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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * RapidIO mport driver for Tsi721 PCIExpress-to-SRIO bridge
4 *
5 * Copyright 2011 Integrated Device Technology, Inc.
6 * Alexandre Bounine <alexandre.bounine@idt.com>
7 * Chul Kim <chul.kim@idt.com>
8 */
9
10#include <linux/io.h>
11#include <linux/errno.h>
12#include <linux/init.h>
13#include <linux/ioport.h>
14#include <linux/kernel.h>
15#include <linux/module.h>
16#include <linux/pci.h>
17#include <linux/rio.h>
18#include <linux/rio_drv.h>
19#include <linux/dma-mapping.h>
20#include <linux/interrupt.h>
21#include <linux/kfifo.h>
22#include <linux/delay.h>
23
24#include "tsi721.h"
25
26#ifdef DEBUG
27u32 tsi_dbg_level;
28module_param_named(dbg_level, tsi_dbg_level, uint, S_IWUSR | S_IRUGO);
29MODULE_PARM_DESC(dbg_level, "Debugging output level (default 0 = none)");
30#endif
31
32static int pcie_mrrs = -1;
33module_param(pcie_mrrs, int, S_IRUGO);
34MODULE_PARM_DESC(pcie_mrrs, "PCIe MRRS override value (0...5)");
35
36static u8 mbox_sel = 0x0f;
37module_param(mbox_sel, byte, S_IRUGO);
38MODULE_PARM_DESC(mbox_sel,
39 "RIO Messaging MBOX Selection Mask (default: 0x0f = all)");
40
41static DEFINE_SPINLOCK(tsi721_maint_lock);
42
43static void tsi721_omsg_handler(struct tsi721_device *priv, int ch);
44static void tsi721_imsg_handler(struct tsi721_device *priv, int ch);
45
46/**
47 * tsi721_lcread - read from local SREP config space
48 * @mport: RapidIO master port info
49 * @index: ID of RapdiIO interface
50 * @offset: Offset into configuration space
51 * @len: Length (in bytes) of the maintenance transaction
52 * @data: Value to be read into
53 *
54 * Generates a local SREP space read.
55 *
56 * Returns: %0 on success or %-EINVAL on failure.
57 */
58static int tsi721_lcread(struct rio_mport *mport, int index, u32 offset,
59 int len, u32 *data)
60{
61 struct tsi721_device *priv = mport->priv;
62
63 if (len != sizeof(u32))
64 return -EINVAL; /* only 32-bit access is supported */
65
66 *data = ioread32(priv->regs + offset);
67
68 return 0;
69}
70
71/**
72 * tsi721_lcwrite - write into local SREP config space
73 * @mport: RapidIO master port info
74 * @index: ID of RapdiIO interface
75 * @offset: Offset into configuration space
76 * @len: Length (in bytes) of the maintenance transaction
77 * @data: Value to be written
78 *
79 * Generates a local write into SREP configuration space.
80 *
81 * Returns: %0 on success or %-EINVAL on failure.
82 */
83static int tsi721_lcwrite(struct rio_mport *mport, int index, u32 offset,
84 int len, u32 data)
85{
86 struct tsi721_device *priv = mport->priv;
87
88 if (len != sizeof(u32))
89 return -EINVAL; /* only 32-bit access is supported */
90
91 iowrite32(data, priv->regs + offset);
92
93 return 0;
94}
95
96/**
97 * tsi721_maint_dma - Helper function to generate RapidIO maintenance
98 * transactions using designated Tsi721 DMA channel.
99 * @priv: pointer to tsi721 private data
100 * @sys_size: RapdiIO transport system size
101 * @destid: Destination ID of transaction
102 * @hopcount: Number of hops to target device
103 * @offset: Offset into configuration space
104 * @len: Length (in bytes) of the maintenance transaction
105 * @data: Location to be read from or write into
106 * @do_wr: Operation flag (1 == MAINT_WR)
107 *
108 * Generates a RapidIO maintenance transaction (Read or Write).
109 * Returns: %0 on success and %-EINVAL or %-EFAULT on failure.
110 */
111static int tsi721_maint_dma(struct tsi721_device *priv, u32 sys_size,
112 u16 destid, u8 hopcount, u32 offset, int len,
113 u32 *data, int do_wr)
114{
115 void __iomem *regs = priv->regs + TSI721_DMAC_BASE(priv->mdma.ch_id);
116 struct tsi721_dma_desc *bd_ptr;
117 u32 rd_count, swr_ptr, ch_stat;
118 unsigned long flags;
119 int i, err = 0;
120 u32 op = do_wr ? MAINT_WR : MAINT_RD;
121
122 if (offset > (RIO_MAINT_SPACE_SZ - len) || (len != sizeof(u32)))
123 return -EINVAL;
124
125 spin_lock_irqsave(&tsi721_maint_lock, flags);
126
127 bd_ptr = priv->mdma.bd_base;
128
129 rd_count = ioread32(regs + TSI721_DMAC_DRDCNT);
130
131 /* Initialize DMA descriptor */
132 bd_ptr[0].type_id = cpu_to_le32((DTYPE2 << 29) | (op << 19) | destid);
133 bd_ptr[0].bcount = cpu_to_le32((sys_size << 26) | 0x04);
134 bd_ptr[0].raddr_lo = cpu_to_le32((hopcount << 24) | offset);
135 bd_ptr[0].raddr_hi = 0;
136 if (do_wr)
137 bd_ptr[0].data[0] = cpu_to_be32p(data);
138 else
139 bd_ptr[0].data[0] = 0xffffffff;
140
141 mb();
142
143 /* Start DMA operation */
144 iowrite32(rd_count + 2, regs + TSI721_DMAC_DWRCNT);
145 ioread32(regs + TSI721_DMAC_DWRCNT);
146 i = 0;
147
148 /* Wait until DMA transfer is finished */
149 while ((ch_stat = ioread32(regs + TSI721_DMAC_STS))
150 & TSI721_DMAC_STS_RUN) {
151 udelay(1);
152 if (++i >= 5000000) {
153 tsi_debug(MAINT, &priv->pdev->dev,
154 "DMA[%d] read timeout ch_status=%x",
155 priv->mdma.ch_id, ch_stat);
156 if (!do_wr)
157 *data = 0xffffffff;
158 err = -EIO;
159 goto err_out;
160 }
161 }
162
163 if (ch_stat & TSI721_DMAC_STS_ABORT) {
164 /* If DMA operation aborted due to error,
165 * reinitialize DMA channel
166 */
167 tsi_debug(MAINT, &priv->pdev->dev, "DMA ABORT ch_stat=%x",
168 ch_stat);
169 tsi_debug(MAINT, &priv->pdev->dev,
170 "OP=%d : destid=%x hc=%x off=%x",
171 do_wr ? MAINT_WR : MAINT_RD,
172 destid, hopcount, offset);
173 iowrite32(TSI721_DMAC_INT_ALL, regs + TSI721_DMAC_INT);
174 iowrite32(TSI721_DMAC_CTL_INIT, regs + TSI721_DMAC_CTL);
175 udelay(10);
176 iowrite32(0, regs + TSI721_DMAC_DWRCNT);
177 udelay(1);
178 if (!do_wr)
179 *data = 0xffffffff;
180 err = -EIO;
181 goto err_out;
182 }
183
184 if (!do_wr)
185 *data = be32_to_cpu(bd_ptr[0].data[0]);
186
187 /*
188 * Update descriptor status FIFO RD pointer.
189 * NOTE: Skipping check and clear FIFO entries because we are waiting
190 * for transfer to be completed.
191 */
192 swr_ptr = ioread32(regs + TSI721_DMAC_DSWP);
193 iowrite32(swr_ptr, regs + TSI721_DMAC_DSRP);
194
195err_out:
196 spin_unlock_irqrestore(&tsi721_maint_lock, flags);
197
198 return err;
199}
200
201/**
202 * tsi721_cread_dma - Generate a RapidIO maintenance read transaction
203 * using Tsi721 BDMA engine.
204 * @mport: RapidIO master port control structure
205 * @index: ID of RapdiIO interface
206 * @destid: Destination ID of transaction
207 * @hopcount: Number of hops to target device
208 * @offset: Offset into configuration space
209 * @len: Length (in bytes) of the maintenance transaction
210 * @data: Location to be read into
211 *
212 * Generates a RapidIO maintenance read transaction.
213 * Returns: %0 on success and %-EINVAL or %-EFAULT on failure.
214 */
215static int tsi721_cread_dma(struct rio_mport *mport, int index, u16 destid,
216 u8 hopcount, u32 offset, int len, u32 *data)
217{
218 struct tsi721_device *priv = mport->priv;
219
220 return tsi721_maint_dma(priv, mport->sys_size, destid, hopcount,
221 offset, len, data, 0);
222}
223
224/**
225 * tsi721_cwrite_dma - Generate a RapidIO maintenance write transaction
226 * using Tsi721 BDMA engine
227 * @mport: RapidIO master port control structure
228 * @index: ID of RapdiIO interface
229 * @destid: Destination ID of transaction
230 * @hopcount: Number of hops to target device
231 * @offset: Offset into configuration space
232 * @len: Length (in bytes) of the maintenance transaction
233 * @data: Value to be written
234 *
235 * Generates a RapidIO maintenance write transaction.
236 * Returns: %0 on success and %-EINVAL or %-EFAULT on failure.
237 */
238static int tsi721_cwrite_dma(struct rio_mport *mport, int index, u16 destid,
239 u8 hopcount, u32 offset, int len, u32 data)
240{
241 struct tsi721_device *priv = mport->priv;
242 u32 temp = data;
243
244 return tsi721_maint_dma(priv, mport->sys_size, destid, hopcount,
245 offset, len, &temp, 1);
246}
247
248/**
249 * tsi721_pw_handler - Tsi721 inbound port-write interrupt handler
250 * @priv: tsi721 device private structure
251 *
252 * Handles inbound port-write interrupts. Copies PW message from an internal
253 * buffer into PW message FIFO and schedules deferred routine to process
254 * queued messages.
255 *
256 * Returns: %0
257 */
258static int
259tsi721_pw_handler(struct tsi721_device *priv)
260{
261 u32 pw_stat;
262 u32 pw_buf[TSI721_RIO_PW_MSG_SIZE/sizeof(u32)];
263
264
265 pw_stat = ioread32(priv->regs + TSI721_RIO_PW_RX_STAT);
266
267 if (pw_stat & TSI721_RIO_PW_RX_STAT_PW_VAL) {
268 pw_buf[0] = ioread32(priv->regs + TSI721_RIO_PW_RX_CAPT(0));
269 pw_buf[1] = ioread32(priv->regs + TSI721_RIO_PW_RX_CAPT(1));
270 pw_buf[2] = ioread32(priv->regs + TSI721_RIO_PW_RX_CAPT(2));
271 pw_buf[3] = ioread32(priv->regs + TSI721_RIO_PW_RX_CAPT(3));
272
273 /* Queue PW message (if there is room in FIFO),
274 * otherwise discard it.
275 */
276 spin_lock(&priv->pw_fifo_lock);
277 if (kfifo_avail(&priv->pw_fifo) >= TSI721_RIO_PW_MSG_SIZE)
278 kfifo_in(&priv->pw_fifo, pw_buf,
279 TSI721_RIO_PW_MSG_SIZE);
280 else
281 priv->pw_discard_count++;
282 spin_unlock(&priv->pw_fifo_lock);
283 }
284
285 /* Clear pending PW interrupts */
286 iowrite32(TSI721_RIO_PW_RX_STAT_PW_DISC | TSI721_RIO_PW_RX_STAT_PW_VAL,
287 priv->regs + TSI721_RIO_PW_RX_STAT);
288
289 schedule_work(&priv->pw_work);
290
291 return 0;
292}
293
294static void tsi721_pw_dpc(struct work_struct *work)
295{
296 struct tsi721_device *priv = container_of(work, struct tsi721_device,
297 pw_work);
298 union rio_pw_msg pwmsg;
299
300 /*
301 * Process port-write messages
302 */
303 while (kfifo_out_spinlocked(&priv->pw_fifo, (unsigned char *)&pwmsg,
304 TSI721_RIO_PW_MSG_SIZE, &priv->pw_fifo_lock)) {
305 /* Pass the port-write message to RIO core for processing */
306 rio_inb_pwrite_handler(&priv->mport, &pwmsg);
307 }
308}
309
310/**
311 * tsi721_pw_enable - enable/disable port-write interface init
312 * @mport: Master port implementing the port write unit
313 * @enable: 1=enable; 0=disable port-write message handling
314 *
315 * Returns: %0
316 */
317static int tsi721_pw_enable(struct rio_mport *mport, int enable)
318{
319 struct tsi721_device *priv = mport->priv;
320 u32 rval;
321
322 rval = ioread32(priv->regs + TSI721_RIO_EM_INT_ENABLE);
323
324 if (enable)
325 rval |= TSI721_RIO_EM_INT_ENABLE_PW_RX;
326 else
327 rval &= ~TSI721_RIO_EM_INT_ENABLE_PW_RX;
328
329 /* Clear pending PW interrupts */
330 iowrite32(TSI721_RIO_PW_RX_STAT_PW_DISC | TSI721_RIO_PW_RX_STAT_PW_VAL,
331 priv->regs + TSI721_RIO_PW_RX_STAT);
332 /* Update enable bits */
333 iowrite32(rval, priv->regs + TSI721_RIO_EM_INT_ENABLE);
334
335 return 0;
336}
337
338/**
339 * tsi721_dsend - Send a RapidIO doorbell
340 * @mport: RapidIO master port info
341 * @index: ID of RapidIO interface
342 * @destid: Destination ID of target device
343 * @data: 16-bit info field of RapidIO doorbell
344 *
345 * Sends a RapidIO doorbell message.
346 *
347 * Returns: %0
348 */
349static int tsi721_dsend(struct rio_mport *mport, int index,
350 u16 destid, u16 data)
351{
352 struct tsi721_device *priv = mport->priv;
353 u32 offset;
354
355 offset = (((mport->sys_size) ? RIO_TT_CODE_16 : RIO_TT_CODE_8) << 18) |
356 (destid << 2);
357
358 tsi_debug(DBELL, &priv->pdev->dev,
359 "Send Doorbell 0x%04x to destID 0x%x", data, destid);
360 iowrite16be(data, priv->odb_base + offset);
361
362 return 0;
363}
364
365/**
366 * tsi721_dbell_handler - Tsi721 doorbell interrupt handler
367 * @priv: tsi721 device-specific data structure
368 *
369 * Handles inbound doorbell interrupts. Copies doorbell entry from an internal
370 * buffer into DB message FIFO and schedules deferred routine to process
371 * queued DBs.
372 *
373 * Returns: %0
374 */
375static int
376tsi721_dbell_handler(struct tsi721_device *priv)
377{
378 u32 regval;
379
380 /* Disable IDB interrupts */
381 regval = ioread32(priv->regs + TSI721_SR_CHINTE(IDB_QUEUE));
382 regval &= ~TSI721_SR_CHINT_IDBQRCV;
383 iowrite32(regval,
384 priv->regs + TSI721_SR_CHINTE(IDB_QUEUE));
385
386 schedule_work(&priv->idb_work);
387
388 return 0;
389}
390
391static void tsi721_db_dpc(struct work_struct *work)
392{
393 struct tsi721_device *priv = container_of(work, struct tsi721_device,
394 idb_work);
395 struct rio_mport *mport;
396 struct rio_dbell *dbell;
397 int found = 0;
398 u32 wr_ptr, rd_ptr;
399 u64 *idb_entry;
400 u32 regval;
401 union {
402 u64 msg;
403 u8 bytes[8];
404 } idb;
405
406 /*
407 * Process queued inbound doorbells
408 */
409 mport = &priv->mport;
410
411 wr_ptr = ioread32(priv->regs + TSI721_IDQ_WP(IDB_QUEUE)) % IDB_QSIZE;
412 rd_ptr = ioread32(priv->regs + TSI721_IDQ_RP(IDB_QUEUE)) % IDB_QSIZE;
413
414 while (wr_ptr != rd_ptr) {
415 idb_entry = (u64 *)(priv->idb_base +
416 (TSI721_IDB_ENTRY_SIZE * rd_ptr));
417 rd_ptr++;
418 rd_ptr %= IDB_QSIZE;
419 idb.msg = *idb_entry;
420 *idb_entry = 0;
421
422 /* Process one doorbell */
423 list_for_each_entry(dbell, &mport->dbells, node) {
424 if ((dbell->res->start <= DBELL_INF(idb.bytes)) &&
425 (dbell->res->end >= DBELL_INF(idb.bytes))) {
426 found = 1;
427 break;
428 }
429 }
430
431 if (found) {
432 dbell->dinb(mport, dbell->dev_id, DBELL_SID(idb.bytes),
433 DBELL_TID(idb.bytes), DBELL_INF(idb.bytes));
434 } else {
435 tsi_debug(DBELL, &priv->pdev->dev,
436 "spurious IDB sid %2.2x tid %2.2x info %4.4x",
437 DBELL_SID(idb.bytes), DBELL_TID(idb.bytes),
438 DBELL_INF(idb.bytes));
439 }
440
441 wr_ptr = ioread32(priv->regs +
442 TSI721_IDQ_WP(IDB_QUEUE)) % IDB_QSIZE;
443 }
444
445 iowrite32(rd_ptr & (IDB_QSIZE - 1),
446 priv->regs + TSI721_IDQ_RP(IDB_QUEUE));
447
448 /* Re-enable IDB interrupts */
449 regval = ioread32(priv->regs + TSI721_SR_CHINTE(IDB_QUEUE));
450 regval |= TSI721_SR_CHINT_IDBQRCV;
451 iowrite32(regval,
452 priv->regs + TSI721_SR_CHINTE(IDB_QUEUE));
453
454 wr_ptr = ioread32(priv->regs + TSI721_IDQ_WP(IDB_QUEUE)) % IDB_QSIZE;
455 if (wr_ptr != rd_ptr)
456 schedule_work(&priv->idb_work);
457}
458
459/**
460 * tsi721_irqhandler - Tsi721 interrupt handler
461 * @irq: Linux interrupt number
462 * @ptr: Pointer to interrupt-specific data (tsi721_device structure)
463 *
464 * Handles Tsi721 interrupts signaled using MSI and INTA. Checks reported
465 * interrupt events and calls an event-specific handler(s).
466 *
467 * Returns: %IRQ_HANDLED or %IRQ_NONE
468 */
469static irqreturn_t tsi721_irqhandler(int irq, void *ptr)
470{
471 struct tsi721_device *priv = (struct tsi721_device *)ptr;
472 u32 dev_int;
473 u32 dev_ch_int;
474 u32 intval;
475 u32 ch_inte;
476
477 /* For MSI mode disable all device-level interrupts */
478 if (priv->flags & TSI721_USING_MSI)
479 iowrite32(0, priv->regs + TSI721_DEV_INTE);
480
481 dev_int = ioread32(priv->regs + TSI721_DEV_INT);
482 if (!dev_int)
483 return IRQ_NONE;
484
485 dev_ch_int = ioread32(priv->regs + TSI721_DEV_CHAN_INT);
486
487 if (dev_int & TSI721_DEV_INT_SR2PC_CH) {
488 /* Service SR2PC Channel interrupts */
489 if (dev_ch_int & TSI721_INT_SR2PC_CHAN(IDB_QUEUE)) {
490 /* Service Inbound Doorbell interrupt */
491 intval = ioread32(priv->regs +
492 TSI721_SR_CHINT(IDB_QUEUE));
493 if (intval & TSI721_SR_CHINT_IDBQRCV)
494 tsi721_dbell_handler(priv);
495 else
496 tsi_info(&priv->pdev->dev,
497 "Unsupported SR_CH_INT %x", intval);
498
499 /* Clear interrupts */
500 iowrite32(intval,
501 priv->regs + TSI721_SR_CHINT(IDB_QUEUE));
502 ioread32(priv->regs + TSI721_SR_CHINT(IDB_QUEUE));
503 }
504 }
505
506 if (dev_int & TSI721_DEV_INT_SMSG_CH) {
507 int ch;
508
509 /*
510 * Service channel interrupts from Messaging Engine
511 */
512
513 if (dev_ch_int & TSI721_INT_IMSG_CHAN_M) { /* Inbound Msg */
514 /* Disable signaled OB MSG Channel interrupts */
515 ch_inte = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
516 ch_inte &= ~(dev_ch_int & TSI721_INT_IMSG_CHAN_M);
517 iowrite32(ch_inte, priv->regs + TSI721_DEV_CHAN_INTE);
518
519 /*
520 * Process Inbound Message interrupt for each MBOX
521 */
522 for (ch = 4; ch < RIO_MAX_MBOX + 4; ch++) {
523 if (!(dev_ch_int & TSI721_INT_IMSG_CHAN(ch)))
524 continue;
525 tsi721_imsg_handler(priv, ch);
526 }
527 }
528
529 if (dev_ch_int & TSI721_INT_OMSG_CHAN_M) { /* Outbound Msg */
530 /* Disable signaled OB MSG Channel interrupts */
531 ch_inte = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
532 ch_inte &= ~(dev_ch_int & TSI721_INT_OMSG_CHAN_M);
533 iowrite32(ch_inte, priv->regs + TSI721_DEV_CHAN_INTE);
534
535 /*
536 * Process Outbound Message interrupts for each MBOX
537 */
538
539 for (ch = 0; ch < RIO_MAX_MBOX; ch++) {
540 if (!(dev_ch_int & TSI721_INT_OMSG_CHAN(ch)))
541 continue;
542 tsi721_omsg_handler(priv, ch);
543 }
544 }
545 }
546
547 if (dev_int & TSI721_DEV_INT_SRIO) {
548 /* Service SRIO MAC interrupts */
549 intval = ioread32(priv->regs + TSI721_RIO_EM_INT_STAT);
550 if (intval & TSI721_RIO_EM_INT_STAT_PW_RX)
551 tsi721_pw_handler(priv);
552 }
553
554#ifdef CONFIG_RAPIDIO_DMA_ENGINE
555 if (dev_int & TSI721_DEV_INT_BDMA_CH) {
556 int ch;
557
558 if (dev_ch_int & TSI721_INT_BDMA_CHAN_M) {
559 tsi_debug(DMA, &priv->pdev->dev,
560 "IRQ from DMA channel 0x%08x", dev_ch_int);
561
562 for (ch = 0; ch < TSI721_DMA_MAXCH; ch++) {
563 if (!(dev_ch_int & TSI721_INT_BDMA_CHAN(ch)))
564 continue;
565 tsi721_bdma_handler(&priv->bdma[ch]);
566 }
567 }
568 }
569#endif
570
571 /* For MSI mode re-enable device-level interrupts */
572 if (priv->flags & TSI721_USING_MSI) {
573 dev_int = TSI721_DEV_INT_SR2PC_CH | TSI721_DEV_INT_SRIO |
574 TSI721_DEV_INT_SMSG_CH | TSI721_DEV_INT_BDMA_CH;
575 iowrite32(dev_int, priv->regs + TSI721_DEV_INTE);
576 }
577
578 return IRQ_HANDLED;
579}
580
581static void tsi721_interrupts_init(struct tsi721_device *priv)
582{
583 u32 intr;
584
585 /* Enable IDB interrupts */
586 iowrite32(TSI721_SR_CHINT_ALL,
587 priv->regs + TSI721_SR_CHINT(IDB_QUEUE));
588 iowrite32(TSI721_SR_CHINT_IDBQRCV,
589 priv->regs + TSI721_SR_CHINTE(IDB_QUEUE));
590
591 /* Enable SRIO MAC interrupts */
592 iowrite32(TSI721_RIO_EM_DEV_INT_EN_INT,
593 priv->regs + TSI721_RIO_EM_DEV_INT_EN);
594
595 /* Enable interrupts from channels in use */
596#ifdef CONFIG_RAPIDIO_DMA_ENGINE
597 intr = TSI721_INT_SR2PC_CHAN(IDB_QUEUE) |
598 (TSI721_INT_BDMA_CHAN_M &
599 ~TSI721_INT_BDMA_CHAN(TSI721_DMACH_MAINT));
600#else
601 intr = TSI721_INT_SR2PC_CHAN(IDB_QUEUE);
602#endif
603 iowrite32(intr, priv->regs + TSI721_DEV_CHAN_INTE);
604
605 if (priv->flags & TSI721_USING_MSIX)
606 intr = TSI721_DEV_INT_SRIO;
607 else
608 intr = TSI721_DEV_INT_SR2PC_CH | TSI721_DEV_INT_SRIO |
609 TSI721_DEV_INT_SMSG_CH | TSI721_DEV_INT_BDMA_CH;
610
611 iowrite32(intr, priv->regs + TSI721_DEV_INTE);
612 ioread32(priv->regs + TSI721_DEV_INTE);
613}
614
615#ifdef CONFIG_PCI_MSI
616/**
617 * tsi721_omsg_msix - MSI-X interrupt handler for outbound messaging
618 * @irq: Linux interrupt number
619 * @ptr: Pointer to interrupt-specific data (tsi721_device structure)
620 *
621 * Handles outbound messaging interrupts signaled using MSI-X.
622 *
623 * Returns: %IRQ_HANDLED
624 */
625static irqreturn_t tsi721_omsg_msix(int irq, void *ptr)
626{
627 struct tsi721_device *priv = (struct tsi721_device *)ptr;
628 int mbox;
629
630 mbox = (irq - priv->msix[TSI721_VECT_OMB0_DONE].vector) % RIO_MAX_MBOX;
631 tsi721_omsg_handler(priv, mbox);
632 return IRQ_HANDLED;
633}
634
635/**
636 * tsi721_imsg_msix - MSI-X interrupt handler for inbound messaging
637 * @irq: Linux interrupt number
638 * @ptr: Pointer to interrupt-specific data (tsi721_device structure)
639 *
640 * Handles inbound messaging interrupts signaled using MSI-X.
641 *
642 * Returns: %IRQ_HANDLED
643 */
644static irqreturn_t tsi721_imsg_msix(int irq, void *ptr)
645{
646 struct tsi721_device *priv = (struct tsi721_device *)ptr;
647 int mbox;
648
649 mbox = (irq - priv->msix[TSI721_VECT_IMB0_RCV].vector) % RIO_MAX_MBOX;
650 tsi721_imsg_handler(priv, mbox + 4);
651 return IRQ_HANDLED;
652}
653
654/**
655 * tsi721_srio_msix - Tsi721 MSI-X SRIO MAC interrupt handler
656 * @irq: Linux interrupt number
657 * @ptr: Pointer to interrupt-specific data (tsi721_device structure)
658 *
659 * Handles Tsi721 interrupts from SRIO MAC.
660 *
661 * Returns: %IRQ_HANDLED
662 */
663static irqreturn_t tsi721_srio_msix(int irq, void *ptr)
664{
665 struct tsi721_device *priv = (struct tsi721_device *)ptr;
666 u32 srio_int;
667
668 /* Service SRIO MAC interrupts */
669 srio_int = ioread32(priv->regs + TSI721_RIO_EM_INT_STAT);
670 if (srio_int & TSI721_RIO_EM_INT_STAT_PW_RX)
671 tsi721_pw_handler(priv);
672
673 return IRQ_HANDLED;
674}
675
676/**
677 * tsi721_sr2pc_ch_msix - Tsi721 MSI-X SR2PC Channel interrupt handler
678 * @irq: Linux interrupt number
679 * @ptr: Pointer to interrupt-specific data (tsi721_device structure)
680 *
681 * Handles Tsi721 interrupts from SR2PC Channel.
682 * NOTE: At this moment services only one SR2PC channel associated with inbound
683 * doorbells.
684 *
685 * Returns: %IRQ_HANDLED
686 */
687static irqreturn_t tsi721_sr2pc_ch_msix(int irq, void *ptr)
688{
689 struct tsi721_device *priv = (struct tsi721_device *)ptr;
690 u32 sr_ch_int;
691
692 /* Service Inbound DB interrupt from SR2PC channel */
693 sr_ch_int = ioread32(priv->regs + TSI721_SR_CHINT(IDB_QUEUE));
694 if (sr_ch_int & TSI721_SR_CHINT_IDBQRCV)
695 tsi721_dbell_handler(priv);
696
697 /* Clear interrupts */
698 iowrite32(sr_ch_int, priv->regs + TSI721_SR_CHINT(IDB_QUEUE));
699 /* Read back to ensure that interrupt was cleared */
700 sr_ch_int = ioread32(priv->regs + TSI721_SR_CHINT(IDB_QUEUE));
701
702 return IRQ_HANDLED;
703}
704
705/**
706 * tsi721_request_msix - register interrupt service for MSI-X mode.
707 * @priv: tsi721 device-specific data structure
708 *
709 * Registers MSI-X interrupt service routines for interrupts that are active
710 * immediately after mport initialization. Messaging interrupt service routines
711 * should be registered during corresponding open requests.
712 *
713 * Returns: %0 on success or -errno value on failure.
714 */
715static int tsi721_request_msix(struct tsi721_device *priv)
716{
717 int err = 0;
718
719 err = request_irq(priv->msix[TSI721_VECT_IDB].vector,
720 tsi721_sr2pc_ch_msix, 0,
721 priv->msix[TSI721_VECT_IDB].irq_name, (void *)priv);
722 if (err)
723 return err;
724
725 err = request_irq(priv->msix[TSI721_VECT_PWRX].vector,
726 tsi721_srio_msix, 0,
727 priv->msix[TSI721_VECT_PWRX].irq_name, (void *)priv);
728 if (err) {
729 free_irq(priv->msix[TSI721_VECT_IDB].vector, (void *)priv);
730 return err;
731 }
732
733 return 0;
734}
735
736/**
737 * tsi721_enable_msix - Attempts to enable MSI-X support for Tsi721.
738 * @priv: pointer to tsi721 private data
739 *
740 * Configures MSI-X support for Tsi721. Supports only an exact number
741 * of requested vectors.
742 *
743 * Returns: %0 on success or -errno value on failure.
744 */
745static int tsi721_enable_msix(struct tsi721_device *priv)
746{
747 struct msix_entry entries[TSI721_VECT_MAX];
748 int err;
749 int i;
750
751 entries[TSI721_VECT_IDB].entry = TSI721_MSIX_SR2PC_IDBQ_RCV(IDB_QUEUE);
752 entries[TSI721_VECT_PWRX].entry = TSI721_MSIX_SRIO_MAC_INT;
753
754 /*
755 * Initialize MSI-X entries for Messaging Engine:
756 * this driver supports four RIO mailboxes (inbound and outbound)
757 * NOTE: Inbound message MBOX 0...4 use IB channels 4...7. Therefore
758 * offset +4 is added to IB MBOX number.
759 */
760 for (i = 0; i < RIO_MAX_MBOX; i++) {
761 entries[TSI721_VECT_IMB0_RCV + i].entry =
762 TSI721_MSIX_IMSG_DQ_RCV(i + 4);
763 entries[TSI721_VECT_IMB0_INT + i].entry =
764 TSI721_MSIX_IMSG_INT(i + 4);
765 entries[TSI721_VECT_OMB0_DONE + i].entry =
766 TSI721_MSIX_OMSG_DONE(i);
767 entries[TSI721_VECT_OMB0_INT + i].entry =
768 TSI721_MSIX_OMSG_INT(i);
769 }
770
771#ifdef CONFIG_RAPIDIO_DMA_ENGINE
772 /*
773 * Initialize MSI-X entries for Block DMA Engine:
774 * this driver supports XXX DMA channels
775 * (one is reserved for SRIO maintenance transactions)
776 */
777 for (i = 0; i < TSI721_DMA_CHNUM; i++) {
778 entries[TSI721_VECT_DMA0_DONE + i].entry =
779 TSI721_MSIX_DMACH_DONE(i);
780 entries[TSI721_VECT_DMA0_INT + i].entry =
781 TSI721_MSIX_DMACH_INT(i);
782 }
783#endif /* CONFIG_RAPIDIO_DMA_ENGINE */
784
785 err = pci_enable_msix_exact(priv->pdev, entries, ARRAY_SIZE(entries));
786 if (err) {
787 tsi_err(&priv->pdev->dev,
788 "Failed to enable MSI-X (err=%d)", err);
789 return err;
790 }
791
792 /*
793 * Copy MSI-X vector information into tsi721 private structure
794 */
795 priv->msix[TSI721_VECT_IDB].vector = entries[TSI721_VECT_IDB].vector;
796 snprintf(priv->msix[TSI721_VECT_IDB].irq_name, IRQ_DEVICE_NAME_MAX,
797 DRV_NAME "-idb@pci:%s", pci_name(priv->pdev));
798 priv->msix[TSI721_VECT_PWRX].vector = entries[TSI721_VECT_PWRX].vector;
799 snprintf(priv->msix[TSI721_VECT_PWRX].irq_name, IRQ_DEVICE_NAME_MAX,
800 DRV_NAME "-pwrx@pci:%s", pci_name(priv->pdev));
801
802 for (i = 0; i < RIO_MAX_MBOX; i++) {
803 priv->msix[TSI721_VECT_IMB0_RCV + i].vector =
804 entries[TSI721_VECT_IMB0_RCV + i].vector;
805 snprintf(priv->msix[TSI721_VECT_IMB0_RCV + i].irq_name,
806 IRQ_DEVICE_NAME_MAX, DRV_NAME "-imbr%d@pci:%s",
807 i, pci_name(priv->pdev));
808
809 priv->msix[TSI721_VECT_IMB0_INT + i].vector =
810 entries[TSI721_VECT_IMB0_INT + i].vector;
811 snprintf(priv->msix[TSI721_VECT_IMB0_INT + i].irq_name,
812 IRQ_DEVICE_NAME_MAX, DRV_NAME "-imbi%d@pci:%s",
813 i, pci_name(priv->pdev));
814
815 priv->msix[TSI721_VECT_OMB0_DONE + i].vector =
816 entries[TSI721_VECT_OMB0_DONE + i].vector;
817 snprintf(priv->msix[TSI721_VECT_OMB0_DONE + i].irq_name,
818 IRQ_DEVICE_NAME_MAX, DRV_NAME "-ombd%d@pci:%s",
819 i, pci_name(priv->pdev));
820
821 priv->msix[TSI721_VECT_OMB0_INT + i].vector =
822 entries[TSI721_VECT_OMB0_INT + i].vector;
823 snprintf(priv->msix[TSI721_VECT_OMB0_INT + i].irq_name,
824 IRQ_DEVICE_NAME_MAX, DRV_NAME "-ombi%d@pci:%s",
825 i, pci_name(priv->pdev));
826 }
827
828#ifdef CONFIG_RAPIDIO_DMA_ENGINE
829 for (i = 0; i < TSI721_DMA_CHNUM; i++) {
830 priv->msix[TSI721_VECT_DMA0_DONE + i].vector =
831 entries[TSI721_VECT_DMA0_DONE + i].vector;
832 snprintf(priv->msix[TSI721_VECT_DMA0_DONE + i].irq_name,
833 IRQ_DEVICE_NAME_MAX, DRV_NAME "-dmad%d@pci:%s",
834 i, pci_name(priv->pdev));
835
836 priv->msix[TSI721_VECT_DMA0_INT + i].vector =
837 entries[TSI721_VECT_DMA0_INT + i].vector;
838 snprintf(priv->msix[TSI721_VECT_DMA0_INT + i].irq_name,
839 IRQ_DEVICE_NAME_MAX, DRV_NAME "-dmai%d@pci:%s",
840 i, pci_name(priv->pdev));
841 }
842#endif /* CONFIG_RAPIDIO_DMA_ENGINE */
843
844 return 0;
845}
846#endif /* CONFIG_PCI_MSI */
847
848static int tsi721_request_irq(struct tsi721_device *priv)
849{
850 int err;
851
852#ifdef CONFIG_PCI_MSI
853 if (priv->flags & TSI721_USING_MSIX)
854 err = tsi721_request_msix(priv);
855 else
856#endif
857 err = request_irq(priv->pdev->irq, tsi721_irqhandler,
858 (priv->flags & TSI721_USING_MSI) ? 0 : IRQF_SHARED,
859 DRV_NAME, (void *)priv);
860
861 if (err)
862 tsi_err(&priv->pdev->dev,
863 "Unable to allocate interrupt, err=%d", err);
864
865 return err;
866}
867
868static void tsi721_free_irq(struct tsi721_device *priv)
869{
870#ifdef CONFIG_PCI_MSI
871 if (priv->flags & TSI721_USING_MSIX) {
872 free_irq(priv->msix[TSI721_VECT_IDB].vector, (void *)priv);
873 free_irq(priv->msix[TSI721_VECT_PWRX].vector, (void *)priv);
874 } else
875#endif
876 free_irq(priv->pdev->irq, (void *)priv);
877}
878
879static int
880tsi721_obw_alloc(struct tsi721_device *priv, struct tsi721_obw_bar *pbar,
881 u32 size, int *win_id)
882{
883 u64 win_base;
884 u64 bar_base;
885 u64 bar_end;
886 u32 align;
887 struct tsi721_ob_win *win;
888 struct tsi721_ob_win *new_win = NULL;
889 int new_win_idx = -1;
890 int i = 0;
891
892 bar_base = pbar->base;
893 bar_end = bar_base + pbar->size;
894 win_base = bar_base;
895 align = size/TSI721_PC2SR_ZONES;
896
897 while (i < TSI721_IBWIN_NUM) {
898 for (i = 0; i < TSI721_IBWIN_NUM; i++) {
899 if (!priv->ob_win[i].active) {
900 if (new_win == NULL) {
901 new_win = &priv->ob_win[i];
902 new_win_idx = i;
903 }
904 continue;
905 }
906
907 /*
908 * If this window belongs to the current BAR check it
909 * for overlap
910 */
911 win = &priv->ob_win[i];
912
913 if (win->base >= bar_base && win->base < bar_end) {
914 if (win_base < (win->base + win->size) &&
915 (win_base + size) > win->base) {
916 /* Overlap detected */
917 win_base = win->base + win->size;
918 win_base = ALIGN(win_base, align);
919 break;
920 }
921 }
922 }
923 }
924
925 if (win_base + size > bar_end)
926 return -ENOMEM;
927
928 if (!new_win) {
929 tsi_err(&priv->pdev->dev, "OBW count tracking failed");
930 return -EIO;
931 }
932
933 new_win->active = true;
934 new_win->base = win_base;
935 new_win->size = size;
936 new_win->pbar = pbar;
937 priv->obwin_cnt--;
938 pbar->free -= size;
939 *win_id = new_win_idx;
940 return 0;
941}
942
943static int tsi721_map_outb_win(struct rio_mport *mport, u16 destid, u64 rstart,
944 u32 size, u32 flags, dma_addr_t *laddr)
945{
946 struct tsi721_device *priv = mport->priv;
947 int i;
948 struct tsi721_obw_bar *pbar;
949 struct tsi721_ob_win *ob_win;
950 int obw = -1;
951 u32 rval;
952 u64 rio_addr;
953 u32 zsize;
954 int ret = -ENOMEM;
955
956 tsi_debug(OBW, &priv->pdev->dev,
957 "did=%d ra=0x%llx sz=0x%x", destid, rstart, size);
958
959 if (!is_power_of_2(size) || (size < 0x8000) || (rstart & (size - 1)))
960 return -EINVAL;
961
962 if (priv->obwin_cnt == 0)
963 return -EBUSY;
964
965 for (i = 0; i < 2; i++) {
966 if (priv->p2r_bar[i].free >= size) {
967 pbar = &priv->p2r_bar[i];
968 ret = tsi721_obw_alloc(priv, pbar, size, &obw);
969 if (!ret)
970 break;
971 }
972 }
973
974 if (ret)
975 return ret;
976
977 WARN_ON(obw == -1);
978 ob_win = &priv->ob_win[obw];
979 ob_win->destid = destid;
980 ob_win->rstart = rstart;
981 tsi_debug(OBW, &priv->pdev->dev,
982 "allocated OBW%d @%llx", obw, ob_win->base);
983
984 /*
985 * Configure Outbound Window
986 */
987
988 zsize = size/TSI721_PC2SR_ZONES;
989 rio_addr = rstart;
990
991 /*
992 * Program Address Translation Zones:
993 * This implementation uses all 8 zones associated wit window.
994 */
995 for (i = 0; i < TSI721_PC2SR_ZONES; i++) {
996
997 while (ioread32(priv->regs + TSI721_ZONE_SEL) &
998 TSI721_ZONE_SEL_GO) {
999 udelay(1);
1000 }
1001
1002 rval = (u32)(rio_addr & TSI721_LUT_DATA0_ADD) |
1003 TSI721_LUT_DATA0_NREAD | TSI721_LUT_DATA0_NWR;
1004 iowrite32(rval, priv->regs + TSI721_LUT_DATA0);
1005 rval = (u32)(rio_addr >> 32);
1006 iowrite32(rval, priv->regs + TSI721_LUT_DATA1);
1007 rval = destid;
1008 iowrite32(rval, priv->regs + TSI721_LUT_DATA2);
1009
1010 rval = TSI721_ZONE_SEL_GO | (obw << 3) | i;
1011 iowrite32(rval, priv->regs + TSI721_ZONE_SEL);
1012
1013 rio_addr += zsize;
1014 }
1015
1016 iowrite32(TSI721_OBWIN_SIZE(size) << 8,
1017 priv->regs + TSI721_OBWINSZ(obw));
1018 iowrite32((u32)(ob_win->base >> 32), priv->regs + TSI721_OBWINUB(obw));
1019 iowrite32((u32)(ob_win->base & TSI721_OBWINLB_BA) | TSI721_OBWINLB_WEN,
1020 priv->regs + TSI721_OBWINLB(obw));
1021
1022 *laddr = ob_win->base;
1023 return 0;
1024}
1025
1026static void tsi721_unmap_outb_win(struct rio_mport *mport,
1027 u16 destid, u64 rstart)
1028{
1029 struct tsi721_device *priv = mport->priv;
1030 struct tsi721_ob_win *ob_win;
1031 int i;
1032
1033 tsi_debug(OBW, &priv->pdev->dev, "did=%d ra=0x%llx", destid, rstart);
1034
1035 for (i = 0; i < TSI721_OBWIN_NUM; i++) {
1036 ob_win = &priv->ob_win[i];
1037
1038 if (ob_win->active &&
1039 ob_win->destid == destid && ob_win->rstart == rstart) {
1040 tsi_debug(OBW, &priv->pdev->dev,
1041 "free OBW%d @%llx", i, ob_win->base);
1042 ob_win->active = false;
1043 iowrite32(0, priv->regs + TSI721_OBWINLB(i));
1044 ob_win->pbar->free += ob_win->size;
1045 priv->obwin_cnt++;
1046 break;
1047 }
1048 }
1049}
1050
1051/**
1052 * tsi721_init_pc2sr_mapping - initializes outbound (PCIe->SRIO)
1053 * translation regions.
1054 * @priv: pointer to tsi721 private data
1055 *
1056 * Disables SREP translation regions.
1057 */
1058static void tsi721_init_pc2sr_mapping(struct tsi721_device *priv)
1059{
1060 int i, z;
1061 u32 rval;
1062
1063 /* Disable all PC2SR translation windows */
1064 for (i = 0; i < TSI721_OBWIN_NUM; i++)
1065 iowrite32(0, priv->regs + TSI721_OBWINLB(i));
1066
1067 /* Initialize zone lookup tables to avoid ECC errors on reads */
1068 iowrite32(0, priv->regs + TSI721_LUT_DATA0);
1069 iowrite32(0, priv->regs + TSI721_LUT_DATA1);
1070 iowrite32(0, priv->regs + TSI721_LUT_DATA2);
1071
1072 for (i = 0; i < TSI721_OBWIN_NUM; i++) {
1073 for (z = 0; z < TSI721_PC2SR_ZONES; z++) {
1074 while (ioread32(priv->regs + TSI721_ZONE_SEL) &
1075 TSI721_ZONE_SEL_GO) {
1076 udelay(1);
1077 }
1078 rval = TSI721_ZONE_SEL_GO | (i << 3) | z;
1079 iowrite32(rval, priv->regs + TSI721_ZONE_SEL);
1080 }
1081 }
1082
1083 if (priv->p2r_bar[0].size == 0 && priv->p2r_bar[1].size == 0) {
1084 priv->obwin_cnt = 0;
1085 return;
1086 }
1087
1088 priv->p2r_bar[0].free = priv->p2r_bar[0].size;
1089 priv->p2r_bar[1].free = priv->p2r_bar[1].size;
1090
1091 for (i = 0; i < TSI721_OBWIN_NUM; i++)
1092 priv->ob_win[i].active = false;
1093
1094 priv->obwin_cnt = TSI721_OBWIN_NUM;
1095}
1096
1097/**
1098 * tsi721_rio_map_inb_mem -- Mapping inbound memory region.
1099 * @mport: RapidIO master port
1100 * @lstart: Local memory space start address.
1101 * @rstart: RapidIO space start address.
1102 * @size: The mapping region size.
1103 * @flags: Flags for mapping. 0 for using default flags.
1104 *
1105 * Return: 0 -- Success.
1106 *
1107 * This function will create the inbound mapping
1108 * from rstart to lstart.
1109 */
1110static int tsi721_rio_map_inb_mem(struct rio_mport *mport, dma_addr_t lstart,
1111 u64 rstart, u64 size, u32 flags)
1112{
1113 struct tsi721_device *priv = mport->priv;
1114 int i, avail = -1;
1115 u32 regval;
1116 struct tsi721_ib_win *ib_win;
1117 bool direct = (lstart == rstart);
1118 u64 ibw_size;
1119 dma_addr_t loc_start;
1120 u64 ibw_start;
1121 struct tsi721_ib_win_mapping *map = NULL;
1122 int ret = -EBUSY;
1123
1124 /* Max IBW size supported by HW is 16GB */
1125 if (size > 0x400000000UL)
1126 return -EINVAL;
1127
1128 if (direct) {
1129 /* Calculate minimal acceptable window size and base address */
1130
1131 ibw_size = roundup_pow_of_two(size);
1132 ibw_start = lstart & ~(ibw_size - 1);
1133
1134 tsi_debug(IBW, &priv->pdev->dev,
1135 "Direct (RIO_0x%llx -> PCIe_%pad), size=0x%llx, ibw_start = 0x%llx",
1136 rstart, &lstart, size, ibw_start);
1137
1138 while ((lstart + size) > (ibw_start + ibw_size)) {
1139 ibw_size *= 2;
1140 ibw_start = lstart & ~(ibw_size - 1);
1141 /* Check for crossing IBW max size 16GB */
1142 if (ibw_size > 0x400000000UL)
1143 return -EBUSY;
1144 }
1145
1146 loc_start = ibw_start;
1147
1148 map = kzalloc(sizeof(struct tsi721_ib_win_mapping), GFP_ATOMIC);
1149 if (map == NULL)
1150 return -ENOMEM;
1151
1152 } else {
1153 tsi_debug(IBW, &priv->pdev->dev,
1154 "Translated (RIO_0x%llx -> PCIe_%pad), size=0x%llx",
1155 rstart, &lstart, size);
1156
1157 if (!is_power_of_2(size) || size < 0x1000 ||
1158 ((u64)lstart & (size - 1)) || (rstart & (size - 1)))
1159 return -EINVAL;
1160 if (priv->ibwin_cnt == 0)
1161 return -EBUSY;
1162 ibw_start = rstart;
1163 ibw_size = size;
1164 loc_start = lstart;
1165 }
1166
1167 /*
1168 * Scan for overlapping with active regions and mark the first available
1169 * IB window at the same time.
1170 */
1171 for (i = 0; i < TSI721_IBWIN_NUM; i++) {
1172 ib_win = &priv->ib_win[i];
1173
1174 if (!ib_win->active) {
1175 if (avail == -1) {
1176 avail = i;
1177 ret = 0;
1178 }
1179 } else if (ibw_start < (ib_win->rstart + ib_win->size) &&
1180 (ibw_start + ibw_size) > ib_win->rstart) {
1181 /* Return error if address translation involved */
1182 if (!direct || ib_win->xlat) {
1183 ret = -EFAULT;
1184 break;
1185 }
1186
1187 /*
1188 * Direct mappings usually are larger than originally
1189 * requested fragments - check if this new request fits
1190 * into it.
1191 */
1192 if (rstart >= ib_win->rstart &&
1193 (rstart + size) <= (ib_win->rstart +
1194 ib_win->size)) {
1195 /* We are in - no further mapping required */
1196 map->lstart = lstart;
1197 list_add_tail(&map->node, &ib_win->mappings);
1198 return 0;
1199 }
1200
1201 ret = -EFAULT;
1202 break;
1203 }
1204 }
1205
1206 if (ret)
1207 goto out;
1208 i = avail;
1209
1210 /* Sanity check: available IB window must be disabled at this point */
1211 regval = ioread32(priv->regs + TSI721_IBWIN_LB(i));
1212 if (WARN_ON(regval & TSI721_IBWIN_LB_WEN)) {
1213 ret = -EIO;
1214 goto out;
1215 }
1216
1217 ib_win = &priv->ib_win[i];
1218 ib_win->active = true;
1219 ib_win->rstart = ibw_start;
1220 ib_win->lstart = loc_start;
1221 ib_win->size = ibw_size;
1222 ib_win->xlat = (lstart != rstart);
1223 INIT_LIST_HEAD(&ib_win->mappings);
1224
1225 /*
1226 * When using direct IBW mapping and have larger than requested IBW size
1227 * we can have multiple local memory blocks mapped through the same IBW
1228 * To handle this situation we maintain list of "clients" for such IBWs.
1229 */
1230 if (direct) {
1231 map->lstart = lstart;
1232 list_add_tail(&map->node, &ib_win->mappings);
1233 }
1234
1235 iowrite32(TSI721_IBWIN_SIZE(ibw_size) << 8,
1236 priv->regs + TSI721_IBWIN_SZ(i));
1237
1238 iowrite32(((u64)loc_start >> 32), priv->regs + TSI721_IBWIN_TUA(i));
1239 iowrite32(((u64)loc_start & TSI721_IBWIN_TLA_ADD),
1240 priv->regs + TSI721_IBWIN_TLA(i));
1241
1242 iowrite32(ibw_start >> 32, priv->regs + TSI721_IBWIN_UB(i));
1243 iowrite32((ibw_start & TSI721_IBWIN_LB_BA) | TSI721_IBWIN_LB_WEN,
1244 priv->regs + TSI721_IBWIN_LB(i));
1245
1246 priv->ibwin_cnt--;
1247
1248 tsi_debug(IBW, &priv->pdev->dev,
1249 "Configured IBWIN%d (RIO_0x%llx -> PCIe_%pad), size=0x%llx",
1250 i, ibw_start, &loc_start, ibw_size);
1251
1252 return 0;
1253out:
1254 kfree(map);
1255 return ret;
1256}
1257
1258/**
1259 * tsi721_rio_unmap_inb_mem -- Unmapping inbound memory region.
1260 * @mport: RapidIO master port
1261 * @lstart: Local memory space start address.
1262 */
1263static void tsi721_rio_unmap_inb_mem(struct rio_mport *mport,
1264 dma_addr_t lstart)
1265{
1266 struct tsi721_device *priv = mport->priv;
1267 struct tsi721_ib_win *ib_win;
1268 int i;
1269
1270 tsi_debug(IBW, &priv->pdev->dev,
1271 "Unmap IBW mapped to PCIe_%pad", &lstart);
1272
1273 /* Search for matching active inbound translation window */
1274 for (i = 0; i < TSI721_IBWIN_NUM; i++) {
1275 ib_win = &priv->ib_win[i];
1276
1277 /* Address translating IBWs must to be an exact march */
1278 if (!ib_win->active ||
1279 (ib_win->xlat && lstart != ib_win->lstart))
1280 continue;
1281
1282 if (lstart >= ib_win->lstart &&
1283 lstart < (ib_win->lstart + ib_win->size)) {
1284
1285 if (!ib_win->xlat) {
1286 struct tsi721_ib_win_mapping *map;
1287 int found = 0;
1288
1289 list_for_each_entry(map,
1290 &ib_win->mappings, node) {
1291 if (map->lstart == lstart) {
1292 list_del(&map->node);
1293 kfree(map);
1294 found = 1;
1295 break;
1296 }
1297 }
1298
1299 if (!found)
1300 continue;
1301
1302 if (!list_empty(&ib_win->mappings))
1303 break;
1304 }
1305
1306 tsi_debug(IBW, &priv->pdev->dev, "Disable IBWIN_%d", i);
1307 iowrite32(0, priv->regs + TSI721_IBWIN_LB(i));
1308 ib_win->active = false;
1309 priv->ibwin_cnt++;
1310 break;
1311 }
1312 }
1313
1314 if (i == TSI721_IBWIN_NUM)
1315 tsi_debug(IBW, &priv->pdev->dev,
1316 "IB window mapped to %pad not found", &lstart);
1317}
1318
1319/**
1320 * tsi721_init_sr2pc_mapping - initializes inbound (SRIO->PCIe)
1321 * translation regions.
1322 * @priv: pointer to tsi721 private data
1323 *
1324 * Disables inbound windows.
1325 */
1326static void tsi721_init_sr2pc_mapping(struct tsi721_device *priv)
1327{
1328 int i;
1329
1330 /* Disable all SR2PC inbound windows */
1331 for (i = 0; i < TSI721_IBWIN_NUM; i++)
1332 iowrite32(0, priv->regs + TSI721_IBWIN_LB(i));
1333 priv->ibwin_cnt = TSI721_IBWIN_NUM;
1334}
1335
1336/*
1337 * tsi721_close_sr2pc_mapping - closes all active inbound (SRIO->PCIe)
1338 * translation regions.
1339 * @priv: pointer to tsi721 device private data
1340 */
1341static void tsi721_close_sr2pc_mapping(struct tsi721_device *priv)
1342{
1343 struct tsi721_ib_win *ib_win;
1344 int i;
1345
1346 /* Disable all active SR2PC inbound windows */
1347 for (i = 0; i < TSI721_IBWIN_NUM; i++) {
1348 ib_win = &priv->ib_win[i];
1349 if (ib_win->active) {
1350 iowrite32(0, priv->regs + TSI721_IBWIN_LB(i));
1351 ib_win->active = false;
1352 }
1353 }
1354}
1355
1356/**
1357 * tsi721_port_write_init - Inbound port write interface init
1358 * @priv: pointer to tsi721 private data
1359 *
1360 * Initializes inbound port write handler.
1361 * Returns: %0 on success or %-ENOMEM on failure.
1362 */
1363static int tsi721_port_write_init(struct tsi721_device *priv)
1364{
1365 priv->pw_discard_count = 0;
1366 INIT_WORK(&priv->pw_work, tsi721_pw_dpc);
1367 spin_lock_init(&priv->pw_fifo_lock);
1368 if (kfifo_alloc(&priv->pw_fifo,
1369 TSI721_RIO_PW_MSG_SIZE * 32, GFP_KERNEL)) {
1370 tsi_err(&priv->pdev->dev, "PW FIFO allocation failed");
1371 return -ENOMEM;
1372 }
1373
1374 /* Use reliable port-write capture mode */
1375 iowrite32(TSI721_RIO_PW_CTL_PWC_REL, priv->regs + TSI721_RIO_PW_CTL);
1376 return 0;
1377}
1378
1379static void tsi721_port_write_free(struct tsi721_device *priv)
1380{
1381 kfifo_free(&priv->pw_fifo);
1382}
1383
1384static int tsi721_doorbell_init(struct tsi721_device *priv)
1385{
1386 /* Outbound Doorbells do not require any setup.
1387 * Tsi721 uses dedicated PCI BAR1 to generate doorbells.
1388 * That BAR1 was mapped during the probe routine.
1389 */
1390
1391 /* Initialize Inbound Doorbell processing DPC and queue */
1392 priv->db_discard_count = 0;
1393 INIT_WORK(&priv->idb_work, tsi721_db_dpc);
1394
1395 /* Allocate buffer for inbound doorbells queue */
1396 priv->idb_base = dma_alloc_coherent(&priv->pdev->dev,
1397 IDB_QSIZE * TSI721_IDB_ENTRY_SIZE,
1398 &priv->idb_dma, GFP_KERNEL);
1399 if (!priv->idb_base)
1400 return -ENOMEM;
1401
1402 tsi_debug(DBELL, &priv->pdev->dev,
1403 "Allocated IDB buffer @ %p (phys = %pad)",
1404 priv->idb_base, &priv->idb_dma);
1405
1406 iowrite32(TSI721_IDQ_SIZE_VAL(IDB_QSIZE),
1407 priv->regs + TSI721_IDQ_SIZE(IDB_QUEUE));
1408 iowrite32(((u64)priv->idb_dma >> 32),
1409 priv->regs + TSI721_IDQ_BASEU(IDB_QUEUE));
1410 iowrite32(((u64)priv->idb_dma & TSI721_IDQ_BASEL_ADDR),
1411 priv->regs + TSI721_IDQ_BASEL(IDB_QUEUE));
1412 /* Enable accepting all inbound doorbells */
1413 iowrite32(0, priv->regs + TSI721_IDQ_MASK(IDB_QUEUE));
1414
1415 iowrite32(TSI721_IDQ_INIT, priv->regs + TSI721_IDQ_CTL(IDB_QUEUE));
1416
1417 iowrite32(0, priv->regs + TSI721_IDQ_RP(IDB_QUEUE));
1418
1419 return 0;
1420}
1421
1422static void tsi721_doorbell_free(struct tsi721_device *priv)
1423{
1424 if (priv->idb_base == NULL)
1425 return;
1426
1427 /* Free buffer allocated for inbound doorbell queue */
1428 dma_free_coherent(&priv->pdev->dev, IDB_QSIZE * TSI721_IDB_ENTRY_SIZE,
1429 priv->idb_base, priv->idb_dma);
1430 priv->idb_base = NULL;
1431}
1432
1433/**
1434 * tsi721_bdma_maint_init - Initialize maintenance request BDMA channel.
1435 * @priv: pointer to tsi721 private data
1436 *
1437 * Initialize BDMA channel allocated for RapidIO maintenance read/write
1438 * request generation
1439 *
1440 * Returns: %0 on success or %-ENOMEM on failure.
1441 */
1442static int tsi721_bdma_maint_init(struct tsi721_device *priv)
1443{
1444 struct tsi721_dma_desc *bd_ptr;
1445 u64 *sts_ptr;
1446 dma_addr_t bd_phys, sts_phys;
1447 int sts_size;
1448 int bd_num = 2;
1449 void __iomem *regs;
1450
1451 tsi_debug(MAINT, &priv->pdev->dev,
1452 "Init BDMA_%d Maintenance requests", TSI721_DMACH_MAINT);
1453
1454 /*
1455 * Initialize DMA channel for maintenance requests
1456 */
1457
1458 priv->mdma.ch_id = TSI721_DMACH_MAINT;
1459 regs = priv->regs + TSI721_DMAC_BASE(TSI721_DMACH_MAINT);
1460
1461 /* Allocate space for DMA descriptors */
1462 bd_ptr = dma_alloc_coherent(&priv->pdev->dev,
1463 bd_num * sizeof(struct tsi721_dma_desc),
1464 &bd_phys, GFP_KERNEL);
1465 if (!bd_ptr)
1466 return -ENOMEM;
1467
1468 priv->mdma.bd_num = bd_num;
1469 priv->mdma.bd_phys = bd_phys;
1470 priv->mdma.bd_base = bd_ptr;
1471
1472 tsi_debug(MAINT, &priv->pdev->dev, "DMA descriptors @ %p (phys = %pad)",
1473 bd_ptr, &bd_phys);
1474
1475 /* Allocate space for descriptor status FIFO */
1476 sts_size = (bd_num >= TSI721_DMA_MINSTSSZ) ?
1477 bd_num : TSI721_DMA_MINSTSSZ;
1478 sts_size = roundup_pow_of_two(sts_size);
1479 sts_ptr = dma_alloc_coherent(&priv->pdev->dev,
1480 sts_size * sizeof(struct tsi721_dma_sts),
1481 &sts_phys, GFP_KERNEL);
1482 if (!sts_ptr) {
1483 /* Free space allocated for DMA descriptors */
1484 dma_free_coherent(&priv->pdev->dev,
1485 bd_num * sizeof(struct tsi721_dma_desc),
1486 bd_ptr, bd_phys);
1487 priv->mdma.bd_base = NULL;
1488 return -ENOMEM;
1489 }
1490
1491 priv->mdma.sts_phys = sts_phys;
1492 priv->mdma.sts_base = sts_ptr;
1493 priv->mdma.sts_size = sts_size;
1494
1495 tsi_debug(MAINT, &priv->pdev->dev,
1496 "desc status FIFO @ %p (phys = %pad) size=0x%x",
1497 sts_ptr, &sts_phys, sts_size);
1498
1499 /* Initialize DMA descriptors ring */
1500 bd_ptr[bd_num - 1].type_id = cpu_to_le32(DTYPE3 << 29);
1501 bd_ptr[bd_num - 1].next_lo = cpu_to_le32((u64)bd_phys &
1502 TSI721_DMAC_DPTRL_MASK);
1503 bd_ptr[bd_num - 1].next_hi = cpu_to_le32((u64)bd_phys >> 32);
1504
1505 /* Setup DMA descriptor pointers */
1506 iowrite32(((u64)bd_phys >> 32), regs + TSI721_DMAC_DPTRH);
1507 iowrite32(((u64)bd_phys & TSI721_DMAC_DPTRL_MASK),
1508 regs + TSI721_DMAC_DPTRL);
1509
1510 /* Setup descriptor status FIFO */
1511 iowrite32(((u64)sts_phys >> 32), regs + TSI721_DMAC_DSBH);
1512 iowrite32(((u64)sts_phys & TSI721_DMAC_DSBL_MASK),
1513 regs + TSI721_DMAC_DSBL);
1514 iowrite32(TSI721_DMAC_DSSZ_SIZE(sts_size),
1515 regs + TSI721_DMAC_DSSZ);
1516
1517 /* Clear interrupt bits */
1518 iowrite32(TSI721_DMAC_INT_ALL, regs + TSI721_DMAC_INT);
1519
1520 ioread32(regs + TSI721_DMAC_INT);
1521
1522 /* Toggle DMA channel initialization */
1523 iowrite32(TSI721_DMAC_CTL_INIT, regs + TSI721_DMAC_CTL);
1524 ioread32(regs + TSI721_DMAC_CTL);
1525 udelay(10);
1526
1527 return 0;
1528}
1529
1530static int tsi721_bdma_maint_free(struct tsi721_device *priv)
1531{
1532 u32 ch_stat;
1533 struct tsi721_bdma_maint *mdma = &priv->mdma;
1534 void __iomem *regs = priv->regs + TSI721_DMAC_BASE(mdma->ch_id);
1535
1536 if (mdma->bd_base == NULL)
1537 return 0;
1538
1539 /* Check if DMA channel still running */
1540 ch_stat = ioread32(regs + TSI721_DMAC_STS);
1541 if (ch_stat & TSI721_DMAC_STS_RUN)
1542 return -EFAULT;
1543
1544 /* Put DMA channel into init state */
1545 iowrite32(TSI721_DMAC_CTL_INIT, regs + TSI721_DMAC_CTL);
1546
1547 /* Free space allocated for DMA descriptors */
1548 dma_free_coherent(&priv->pdev->dev,
1549 mdma->bd_num * sizeof(struct tsi721_dma_desc),
1550 mdma->bd_base, mdma->bd_phys);
1551 mdma->bd_base = NULL;
1552
1553 /* Free space allocated for status FIFO */
1554 dma_free_coherent(&priv->pdev->dev,
1555 mdma->sts_size * sizeof(struct tsi721_dma_sts),
1556 mdma->sts_base, mdma->sts_phys);
1557 mdma->sts_base = NULL;
1558 return 0;
1559}
1560
1561/* Enable Inbound Messaging Interrupts */
1562static void
1563tsi721_imsg_interrupt_enable(struct tsi721_device *priv, int ch,
1564 u32 inte_mask)
1565{
1566 u32 rval;
1567
1568 if (!inte_mask)
1569 return;
1570
1571 /* Clear pending Inbound Messaging interrupts */
1572 iowrite32(inte_mask, priv->regs + TSI721_IBDMAC_INT(ch));
1573
1574 /* Enable Inbound Messaging interrupts */
1575 rval = ioread32(priv->regs + TSI721_IBDMAC_INTE(ch));
1576 iowrite32(rval | inte_mask, priv->regs + TSI721_IBDMAC_INTE(ch));
1577
1578 if (priv->flags & TSI721_USING_MSIX)
1579 return; /* Finished if we are in MSI-X mode */
1580
1581 /*
1582 * For MSI and INTA interrupt signalling we need to enable next levels
1583 */
1584
1585 /* Enable Device Channel Interrupt */
1586 rval = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
1587 iowrite32(rval | TSI721_INT_IMSG_CHAN(ch),
1588 priv->regs + TSI721_DEV_CHAN_INTE);
1589}
1590
1591/* Disable Inbound Messaging Interrupts */
1592static void
1593tsi721_imsg_interrupt_disable(struct tsi721_device *priv, int ch,
1594 u32 inte_mask)
1595{
1596 u32 rval;
1597
1598 if (!inte_mask)
1599 return;
1600
1601 /* Clear pending Inbound Messaging interrupts */
1602 iowrite32(inte_mask, priv->regs + TSI721_IBDMAC_INT(ch));
1603
1604 /* Disable Inbound Messaging interrupts */
1605 rval = ioread32(priv->regs + TSI721_IBDMAC_INTE(ch));
1606 rval &= ~inte_mask;
1607 iowrite32(rval, priv->regs + TSI721_IBDMAC_INTE(ch));
1608
1609 if (priv->flags & TSI721_USING_MSIX)
1610 return; /* Finished if we are in MSI-X mode */
1611
1612 /*
1613 * For MSI and INTA interrupt signalling we need to disable next levels
1614 */
1615
1616 /* Disable Device Channel Interrupt */
1617 rval = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
1618 rval &= ~TSI721_INT_IMSG_CHAN(ch);
1619 iowrite32(rval, priv->regs + TSI721_DEV_CHAN_INTE);
1620}
1621
1622/* Enable Outbound Messaging interrupts */
1623static void
1624tsi721_omsg_interrupt_enable(struct tsi721_device *priv, int ch,
1625 u32 inte_mask)
1626{
1627 u32 rval;
1628
1629 if (!inte_mask)
1630 return;
1631
1632 /* Clear pending Outbound Messaging interrupts */
1633 iowrite32(inte_mask, priv->regs + TSI721_OBDMAC_INT(ch));
1634
1635 /* Enable Outbound Messaging channel interrupts */
1636 rval = ioread32(priv->regs + TSI721_OBDMAC_INTE(ch));
1637 iowrite32(rval | inte_mask, priv->regs + TSI721_OBDMAC_INTE(ch));
1638
1639 if (priv->flags & TSI721_USING_MSIX)
1640 return; /* Finished if we are in MSI-X mode */
1641
1642 /*
1643 * For MSI and INTA interrupt signalling we need to enable next levels
1644 */
1645
1646 /* Enable Device Channel Interrupt */
1647 rval = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
1648 iowrite32(rval | TSI721_INT_OMSG_CHAN(ch),
1649 priv->regs + TSI721_DEV_CHAN_INTE);
1650}
1651
1652/* Disable Outbound Messaging interrupts */
1653static void
1654tsi721_omsg_interrupt_disable(struct tsi721_device *priv, int ch,
1655 u32 inte_mask)
1656{
1657 u32 rval;
1658
1659 if (!inte_mask)
1660 return;
1661
1662 /* Clear pending Outbound Messaging interrupts */
1663 iowrite32(inte_mask, priv->regs + TSI721_OBDMAC_INT(ch));
1664
1665 /* Disable Outbound Messaging interrupts */
1666 rval = ioread32(priv->regs + TSI721_OBDMAC_INTE(ch));
1667 rval &= ~inte_mask;
1668 iowrite32(rval, priv->regs + TSI721_OBDMAC_INTE(ch));
1669
1670 if (priv->flags & TSI721_USING_MSIX)
1671 return; /* Finished if we are in MSI-X mode */
1672
1673 /*
1674 * For MSI and INTA interrupt signalling we need to disable next levels
1675 */
1676
1677 /* Disable Device Channel Interrupt */
1678 rval = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
1679 rval &= ~TSI721_INT_OMSG_CHAN(ch);
1680 iowrite32(rval, priv->regs + TSI721_DEV_CHAN_INTE);
1681}
1682
1683/**
1684 * tsi721_add_outb_message - Add message to the Tsi721 outbound message queue
1685 * @mport: Master port with outbound message queue
1686 * @rdev: Target of outbound message
1687 * @mbox: Outbound mailbox
1688 * @buffer: Message to add to outbound queue
1689 * @len: Length of message
1690 *
1691 * Returns: %0 on success or -errno value on failure.
1692 */
1693static int
1694tsi721_add_outb_message(struct rio_mport *mport, struct rio_dev *rdev, int mbox,
1695 void *buffer, size_t len)
1696{
1697 struct tsi721_device *priv = mport->priv;
1698 struct tsi721_omsg_desc *desc;
1699 u32 tx_slot;
1700 unsigned long flags;
1701
1702 if (!priv->omsg_init[mbox] ||
1703 len > TSI721_MSG_MAX_SIZE || len < 8)
1704 return -EINVAL;
1705
1706 spin_lock_irqsave(&priv->omsg_ring[mbox].lock, flags);
1707
1708 tx_slot = priv->omsg_ring[mbox].tx_slot;
1709
1710 /* Copy copy message into transfer buffer */
1711 memcpy(priv->omsg_ring[mbox].omq_base[tx_slot], buffer, len);
1712
1713 if (len & 0x7)
1714 len += 8;
1715
1716 /* Build descriptor associated with buffer */
1717 desc = priv->omsg_ring[mbox].omd_base;
1718 desc[tx_slot].type_id = cpu_to_le32((DTYPE4 << 29) | rdev->destid);
1719#ifdef TSI721_OMSG_DESC_INT
1720 /* Request IOF_DONE interrupt generation for each N-th frame in queue */
1721 if (tx_slot % 4 == 0)
1722 desc[tx_slot].type_id |= cpu_to_le32(TSI721_OMD_IOF);
1723#endif
1724 desc[tx_slot].msg_info =
1725 cpu_to_le32((mport->sys_size << 26) | (mbox << 22) |
1726 (0xe << 12) | (len & 0xff8));
1727 desc[tx_slot].bufptr_lo =
1728 cpu_to_le32((u64)priv->omsg_ring[mbox].omq_phys[tx_slot] &
1729 0xffffffff);
1730 desc[tx_slot].bufptr_hi =
1731 cpu_to_le32((u64)priv->omsg_ring[mbox].omq_phys[tx_slot] >> 32);
1732
1733 priv->omsg_ring[mbox].wr_count++;
1734
1735 /* Go to next descriptor */
1736 if (++priv->omsg_ring[mbox].tx_slot == priv->omsg_ring[mbox].size) {
1737 priv->omsg_ring[mbox].tx_slot = 0;
1738 /* Move through the ring link descriptor at the end */
1739 priv->omsg_ring[mbox].wr_count++;
1740 }
1741
1742 mb();
1743
1744 /* Set new write count value */
1745 iowrite32(priv->omsg_ring[mbox].wr_count,
1746 priv->regs + TSI721_OBDMAC_DWRCNT(mbox));
1747 ioread32(priv->regs + TSI721_OBDMAC_DWRCNT(mbox));
1748
1749 spin_unlock_irqrestore(&priv->omsg_ring[mbox].lock, flags);
1750
1751 return 0;
1752}
1753
1754/**
1755 * tsi721_omsg_handler - Outbound Message Interrupt Handler
1756 * @priv: pointer to tsi721 private data
1757 * @ch: number of OB MSG channel to service
1758 *
1759 * Services channel interrupts from outbound messaging engine.
1760 */
1761static void tsi721_omsg_handler(struct tsi721_device *priv, int ch)
1762{
1763 u32 omsg_int;
1764 struct rio_mport *mport = &priv->mport;
1765 void *dev_id = NULL;
1766 u32 tx_slot = 0xffffffff;
1767 int do_callback = 0;
1768
1769 spin_lock(&priv->omsg_ring[ch].lock);
1770
1771 omsg_int = ioread32(priv->regs + TSI721_OBDMAC_INT(ch));
1772
1773 if (omsg_int & TSI721_OBDMAC_INT_ST_FULL)
1774 tsi_info(&priv->pdev->dev,
1775 "OB MBOX%d: Status FIFO is full", ch);
1776
1777 if (omsg_int & (TSI721_OBDMAC_INT_DONE | TSI721_OBDMAC_INT_IOF_DONE)) {
1778 u32 srd_ptr;
1779 u64 *sts_ptr, last_ptr = 0, prev_ptr = 0;
1780 int i, j;
1781
1782 /*
1783 * Find last successfully processed descriptor
1784 */
1785
1786 /* Check and clear descriptor status FIFO entries */
1787 srd_ptr = priv->omsg_ring[ch].sts_rdptr;
1788 sts_ptr = priv->omsg_ring[ch].sts_base;
1789 j = srd_ptr * 8;
1790 while (sts_ptr[j]) {
1791 for (i = 0; i < 8 && sts_ptr[j]; i++, j++) {
1792 prev_ptr = last_ptr;
1793 last_ptr = le64_to_cpu(sts_ptr[j]);
1794 sts_ptr[j] = 0;
1795 }
1796
1797 ++srd_ptr;
1798 srd_ptr %= priv->omsg_ring[ch].sts_size;
1799 j = srd_ptr * 8;
1800 }
1801
1802 if (last_ptr == 0)
1803 goto no_sts_update;
1804
1805 priv->omsg_ring[ch].sts_rdptr = srd_ptr;
1806 iowrite32(srd_ptr, priv->regs + TSI721_OBDMAC_DSRP(ch));
1807
1808 if (!mport->outb_msg[ch].mcback)
1809 goto no_sts_update;
1810
1811 /* Inform upper layer about transfer completion */
1812
1813 tx_slot = (last_ptr - (u64)priv->omsg_ring[ch].omd_phys)/
1814 sizeof(struct tsi721_omsg_desc);
1815
1816 /*
1817 * Check if this is a Link Descriptor (LD).
1818 * If yes, ignore LD and use descriptor processed
1819 * before LD.
1820 */
1821 if (tx_slot == priv->omsg_ring[ch].size) {
1822 if (prev_ptr)
1823 tx_slot = (prev_ptr -
1824 (u64)priv->omsg_ring[ch].omd_phys)/
1825 sizeof(struct tsi721_omsg_desc);
1826 else
1827 goto no_sts_update;
1828 }
1829
1830 if (tx_slot >= priv->omsg_ring[ch].size)
1831 tsi_debug(OMSG, &priv->pdev->dev,
1832 "OB_MSG tx_slot=%x > size=%x",
1833 tx_slot, priv->omsg_ring[ch].size);
1834 WARN_ON(tx_slot >= priv->omsg_ring[ch].size);
1835
1836 /* Move slot index to the next message to be sent */
1837 ++tx_slot;
1838 if (tx_slot == priv->omsg_ring[ch].size)
1839 tx_slot = 0;
1840
1841 dev_id = priv->omsg_ring[ch].dev_id;
1842 do_callback = 1;
1843 }
1844
1845no_sts_update:
1846
1847 if (omsg_int & TSI721_OBDMAC_INT_ERROR) {
1848 /*
1849 * Outbound message operation aborted due to error,
1850 * reinitialize OB MSG channel
1851 */
1852
1853 tsi_debug(OMSG, &priv->pdev->dev, "OB MSG ABORT ch_stat=%x",
1854 ioread32(priv->regs + TSI721_OBDMAC_STS(ch)));
1855
1856 iowrite32(TSI721_OBDMAC_INT_ERROR,
1857 priv->regs + TSI721_OBDMAC_INT(ch));
1858 iowrite32(TSI721_OBDMAC_CTL_RETRY_THR | TSI721_OBDMAC_CTL_INIT,
1859 priv->regs + TSI721_OBDMAC_CTL(ch));
1860 ioread32(priv->regs + TSI721_OBDMAC_CTL(ch));
1861
1862 /* Inform upper level to clear all pending tx slots */
1863 dev_id = priv->omsg_ring[ch].dev_id;
1864 tx_slot = priv->omsg_ring[ch].tx_slot;
1865 do_callback = 1;
1866
1867 /* Synch tx_slot tracking */
1868 iowrite32(priv->omsg_ring[ch].tx_slot,
1869 priv->regs + TSI721_OBDMAC_DRDCNT(ch));
1870 ioread32(priv->regs + TSI721_OBDMAC_DRDCNT(ch));
1871 priv->omsg_ring[ch].wr_count = priv->omsg_ring[ch].tx_slot;
1872 priv->omsg_ring[ch].sts_rdptr = 0;
1873 }
1874
1875 /* Clear channel interrupts */
1876 iowrite32(omsg_int, priv->regs + TSI721_OBDMAC_INT(ch));
1877
1878 if (!(priv->flags & TSI721_USING_MSIX)) {
1879 u32 ch_inte;
1880
1881 /* Re-enable channel interrupts */
1882 ch_inte = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
1883 ch_inte |= TSI721_INT_OMSG_CHAN(ch);
1884 iowrite32(ch_inte, priv->regs + TSI721_DEV_CHAN_INTE);
1885 }
1886
1887 spin_unlock(&priv->omsg_ring[ch].lock);
1888
1889 if (mport->outb_msg[ch].mcback && do_callback)
1890 mport->outb_msg[ch].mcback(mport, dev_id, ch, tx_slot);
1891}
1892
1893/**
1894 * tsi721_open_outb_mbox - Initialize Tsi721 outbound mailbox
1895 * @mport: Master port implementing Outbound Messaging Engine
1896 * @dev_id: Device specific pointer to pass on event
1897 * @mbox: Mailbox to open
1898 * @entries: Number of entries in the outbound mailbox ring
1899 *
1900 * Returns: %0 on success or -errno value on failure.
1901 */
1902static int tsi721_open_outb_mbox(struct rio_mport *mport, void *dev_id,
1903 int mbox, int entries)
1904{
1905 struct tsi721_device *priv = mport->priv;
1906 struct tsi721_omsg_desc *bd_ptr;
1907 int i, rc = 0;
1908
1909 if ((entries < TSI721_OMSGD_MIN_RING_SIZE) ||
1910 (entries > (TSI721_OMSGD_RING_SIZE)) ||
1911 (!is_power_of_2(entries)) || mbox >= RIO_MAX_MBOX) {
1912 rc = -EINVAL;
1913 goto out;
1914 }
1915
1916 if ((mbox_sel & (1 << mbox)) == 0) {
1917 rc = -ENODEV;
1918 goto out;
1919 }
1920
1921 priv->omsg_ring[mbox].dev_id = dev_id;
1922 priv->omsg_ring[mbox].size = entries;
1923 priv->omsg_ring[mbox].sts_rdptr = 0;
1924 spin_lock_init(&priv->omsg_ring[mbox].lock);
1925
1926 /* Outbound Msg Buffer allocation based on
1927 the number of maximum descriptor entries */
1928 for (i = 0; i < entries; i++) {
1929 priv->omsg_ring[mbox].omq_base[i] =
1930 dma_alloc_coherent(
1931 &priv->pdev->dev, TSI721_MSG_BUFFER_SIZE,
1932 &priv->omsg_ring[mbox].omq_phys[i],
1933 GFP_KERNEL);
1934 if (priv->omsg_ring[mbox].omq_base[i] == NULL) {
1935 tsi_debug(OMSG, &priv->pdev->dev,
1936 "ENOMEM for OB_MSG_%d data buffer", mbox);
1937 rc = -ENOMEM;
1938 goto out_buf;
1939 }
1940 }
1941
1942 /* Outbound message descriptor allocation */
1943 priv->omsg_ring[mbox].omd_base = dma_alloc_coherent(
1944 &priv->pdev->dev,
1945 (entries + 1) * sizeof(struct tsi721_omsg_desc),
1946 &priv->omsg_ring[mbox].omd_phys, GFP_KERNEL);
1947 if (priv->omsg_ring[mbox].omd_base == NULL) {
1948 tsi_debug(OMSG, &priv->pdev->dev,
1949 "ENOMEM for OB_MSG_%d descriptor memory", mbox);
1950 rc = -ENOMEM;
1951 goto out_buf;
1952 }
1953
1954 priv->omsg_ring[mbox].tx_slot = 0;
1955
1956 /* Outbound message descriptor status FIFO allocation */
1957 priv->omsg_ring[mbox].sts_size = roundup_pow_of_two(entries + 1);
1958 priv->omsg_ring[mbox].sts_base = dma_alloc_coherent(&priv->pdev->dev,
1959 priv->omsg_ring[mbox].sts_size * sizeof(struct tsi721_dma_sts),
1960 &priv->omsg_ring[mbox].sts_phys,
1961 GFP_KERNEL);
1962 if (priv->omsg_ring[mbox].sts_base == NULL) {
1963 tsi_debug(OMSG, &priv->pdev->dev,
1964 "ENOMEM for OB_MSG_%d status FIFO", mbox);
1965 rc = -ENOMEM;
1966 goto out_desc;
1967 }
1968
1969 /*
1970 * Configure Outbound Messaging Engine
1971 */
1972
1973 /* Setup Outbound Message descriptor pointer */
1974 iowrite32(((u64)priv->omsg_ring[mbox].omd_phys >> 32),
1975 priv->regs + TSI721_OBDMAC_DPTRH(mbox));
1976 iowrite32(((u64)priv->omsg_ring[mbox].omd_phys &
1977 TSI721_OBDMAC_DPTRL_MASK),
1978 priv->regs + TSI721_OBDMAC_DPTRL(mbox));
1979
1980 /* Setup Outbound Message descriptor status FIFO */
1981 iowrite32(((u64)priv->omsg_ring[mbox].sts_phys >> 32),
1982 priv->regs + TSI721_OBDMAC_DSBH(mbox));
1983 iowrite32(((u64)priv->omsg_ring[mbox].sts_phys &
1984 TSI721_OBDMAC_DSBL_MASK),
1985 priv->regs + TSI721_OBDMAC_DSBL(mbox));
1986 iowrite32(TSI721_DMAC_DSSZ_SIZE(priv->omsg_ring[mbox].sts_size),
1987 priv->regs + (u32)TSI721_OBDMAC_DSSZ(mbox));
1988
1989 /* Enable interrupts */
1990
1991#ifdef CONFIG_PCI_MSI
1992 if (priv->flags & TSI721_USING_MSIX) {
1993 int idx = TSI721_VECT_OMB0_DONE + mbox;
1994
1995 /* Request interrupt service if we are in MSI-X mode */
1996 rc = request_irq(priv->msix[idx].vector, tsi721_omsg_msix, 0,
1997 priv->msix[idx].irq_name, (void *)priv);
1998
1999 if (rc) {
2000 tsi_debug(OMSG, &priv->pdev->dev,
2001 "Unable to get MSI-X IRQ for OBOX%d-DONE",
2002 mbox);
2003 goto out_stat;
2004 }
2005
2006 idx = TSI721_VECT_OMB0_INT + mbox;
2007 rc = request_irq(priv->msix[idx].vector, tsi721_omsg_msix, 0,
2008 priv->msix[idx].irq_name, (void *)priv);
2009
2010 if (rc) {
2011 tsi_debug(OMSG, &priv->pdev->dev,
2012 "Unable to get MSI-X IRQ for MBOX%d-INT", mbox);
2013 idx = TSI721_VECT_OMB0_DONE + mbox;
2014 free_irq(priv->msix[idx].vector, (void *)priv);
2015 goto out_stat;
2016 }
2017 }
2018#endif /* CONFIG_PCI_MSI */
2019
2020 tsi721_omsg_interrupt_enable(priv, mbox, TSI721_OBDMAC_INT_ALL);
2021
2022 /* Initialize Outbound Message descriptors ring */
2023 bd_ptr = priv->omsg_ring[mbox].omd_base;
2024 bd_ptr[entries].type_id = cpu_to_le32(DTYPE5 << 29);
2025 bd_ptr[entries].msg_info = 0;
2026 bd_ptr[entries].next_lo =
2027 cpu_to_le32((u64)priv->omsg_ring[mbox].omd_phys &
2028 TSI721_OBDMAC_DPTRL_MASK);
2029 bd_ptr[entries].next_hi =
2030 cpu_to_le32((u64)priv->omsg_ring[mbox].omd_phys >> 32);
2031 priv->omsg_ring[mbox].wr_count = 0;
2032 mb();
2033
2034 /* Initialize Outbound Message engine */
2035 iowrite32(TSI721_OBDMAC_CTL_RETRY_THR | TSI721_OBDMAC_CTL_INIT,
2036 priv->regs + TSI721_OBDMAC_CTL(mbox));
2037 ioread32(priv->regs + TSI721_OBDMAC_DWRCNT(mbox));
2038 udelay(10);
2039
2040 priv->omsg_init[mbox] = 1;
2041
2042 return 0;
2043
2044#ifdef CONFIG_PCI_MSI
2045out_stat:
2046 dma_free_coherent(&priv->pdev->dev,
2047 priv->omsg_ring[mbox].sts_size * sizeof(struct tsi721_dma_sts),
2048 priv->omsg_ring[mbox].sts_base,
2049 priv->omsg_ring[mbox].sts_phys);
2050
2051 priv->omsg_ring[mbox].sts_base = NULL;
2052#endif /* CONFIG_PCI_MSI */
2053
2054out_desc:
2055 dma_free_coherent(&priv->pdev->dev,
2056 (entries + 1) * sizeof(struct tsi721_omsg_desc),
2057 priv->omsg_ring[mbox].omd_base,
2058 priv->omsg_ring[mbox].omd_phys);
2059
2060 priv->omsg_ring[mbox].omd_base = NULL;
2061
2062out_buf:
2063 for (i = 0; i < priv->omsg_ring[mbox].size; i++) {
2064 if (priv->omsg_ring[mbox].omq_base[i]) {
2065 dma_free_coherent(&priv->pdev->dev,
2066 TSI721_MSG_BUFFER_SIZE,
2067 priv->omsg_ring[mbox].omq_base[i],
2068 priv->omsg_ring[mbox].omq_phys[i]);
2069
2070 priv->omsg_ring[mbox].omq_base[i] = NULL;
2071 }
2072 }
2073
2074out:
2075 return rc;
2076}
2077
2078/**
2079 * tsi721_close_outb_mbox - Close Tsi721 outbound mailbox
2080 * @mport: Master port implementing the outbound message unit
2081 * @mbox: Mailbox to close
2082 */
2083static void tsi721_close_outb_mbox(struct rio_mport *mport, int mbox)
2084{
2085 struct tsi721_device *priv = mport->priv;
2086 u32 i;
2087
2088 if (!priv->omsg_init[mbox])
2089 return;
2090 priv->omsg_init[mbox] = 0;
2091
2092 /* Disable Interrupts */
2093
2094 tsi721_omsg_interrupt_disable(priv, mbox, TSI721_OBDMAC_INT_ALL);
2095
2096#ifdef CONFIG_PCI_MSI
2097 if (priv->flags & TSI721_USING_MSIX) {
2098 free_irq(priv->msix[TSI721_VECT_OMB0_DONE + mbox].vector,
2099 (void *)priv);
2100 free_irq(priv->msix[TSI721_VECT_OMB0_INT + mbox].vector,
2101 (void *)priv);
2102 }
2103#endif /* CONFIG_PCI_MSI */
2104
2105 /* Free OMSG Descriptor Status FIFO */
2106 dma_free_coherent(&priv->pdev->dev,
2107 priv->omsg_ring[mbox].sts_size * sizeof(struct tsi721_dma_sts),
2108 priv->omsg_ring[mbox].sts_base,
2109 priv->omsg_ring[mbox].sts_phys);
2110
2111 priv->omsg_ring[mbox].sts_base = NULL;
2112
2113 /* Free OMSG descriptors */
2114 dma_free_coherent(&priv->pdev->dev,
2115 (priv->omsg_ring[mbox].size + 1) *
2116 sizeof(struct tsi721_omsg_desc),
2117 priv->omsg_ring[mbox].omd_base,
2118 priv->omsg_ring[mbox].omd_phys);
2119
2120 priv->omsg_ring[mbox].omd_base = NULL;
2121
2122 /* Free message buffers */
2123 for (i = 0; i < priv->omsg_ring[mbox].size; i++) {
2124 if (priv->omsg_ring[mbox].omq_base[i]) {
2125 dma_free_coherent(&priv->pdev->dev,
2126 TSI721_MSG_BUFFER_SIZE,
2127 priv->omsg_ring[mbox].omq_base[i],
2128 priv->omsg_ring[mbox].omq_phys[i]);
2129
2130 priv->omsg_ring[mbox].omq_base[i] = NULL;
2131 }
2132 }
2133}
2134
2135/**
2136 * tsi721_imsg_handler - Inbound Message Interrupt Handler
2137 * @priv: pointer to tsi721 private data
2138 * @ch: inbound message channel number to service
2139 *
2140 * Services channel interrupts from inbound messaging engine.
2141 */
2142static void tsi721_imsg_handler(struct tsi721_device *priv, int ch)
2143{
2144 u32 mbox = ch - 4;
2145 u32 imsg_int;
2146 struct rio_mport *mport = &priv->mport;
2147
2148 spin_lock(&priv->imsg_ring[mbox].lock);
2149
2150 imsg_int = ioread32(priv->regs + TSI721_IBDMAC_INT(ch));
2151
2152 if (imsg_int & TSI721_IBDMAC_INT_SRTO)
2153 tsi_info(&priv->pdev->dev, "IB MBOX%d SRIO timeout", mbox);
2154
2155 if (imsg_int & TSI721_IBDMAC_INT_PC_ERROR)
2156 tsi_info(&priv->pdev->dev, "IB MBOX%d PCIe error", mbox);
2157
2158 if (imsg_int & TSI721_IBDMAC_INT_FQ_LOW)
2159 tsi_info(&priv->pdev->dev, "IB MBOX%d IB free queue low", mbox);
2160
2161 /* Clear IB channel interrupts */
2162 iowrite32(imsg_int, priv->regs + TSI721_IBDMAC_INT(ch));
2163
2164 /* If an IB Msg is received notify the upper layer */
2165 if (imsg_int & TSI721_IBDMAC_INT_DQ_RCV &&
2166 mport->inb_msg[mbox].mcback)
2167 mport->inb_msg[mbox].mcback(mport,
2168 priv->imsg_ring[mbox].dev_id, mbox, -1);
2169
2170 if (!(priv->flags & TSI721_USING_MSIX)) {
2171 u32 ch_inte;
2172
2173 /* Re-enable channel interrupts */
2174 ch_inte = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
2175 ch_inte |= TSI721_INT_IMSG_CHAN(ch);
2176 iowrite32(ch_inte, priv->regs + TSI721_DEV_CHAN_INTE);
2177 }
2178
2179 spin_unlock(&priv->imsg_ring[mbox].lock);
2180}
2181
2182/**
2183 * tsi721_open_inb_mbox - Initialize Tsi721 inbound mailbox
2184 * @mport: Master port implementing the Inbound Messaging Engine
2185 * @dev_id: Device specific pointer to pass on event
2186 * @mbox: Mailbox to open
2187 * @entries: Number of entries in the inbound mailbox ring
2188 *
2189 * Returns: %0 on success or -errno value on failure.
2190 */
2191static int tsi721_open_inb_mbox(struct rio_mport *mport, void *dev_id,
2192 int mbox, int entries)
2193{
2194 struct tsi721_device *priv = mport->priv;
2195 int ch = mbox + 4;
2196 int i;
2197 u64 *free_ptr;
2198 int rc = 0;
2199
2200 if ((entries < TSI721_IMSGD_MIN_RING_SIZE) ||
2201 (entries > TSI721_IMSGD_RING_SIZE) ||
2202 (!is_power_of_2(entries)) || mbox >= RIO_MAX_MBOX) {
2203 rc = -EINVAL;
2204 goto out;
2205 }
2206
2207 if ((mbox_sel & (1 << mbox)) == 0) {
2208 rc = -ENODEV;
2209 goto out;
2210 }
2211
2212 /* Initialize IB Messaging Ring */
2213 priv->imsg_ring[mbox].dev_id = dev_id;
2214 priv->imsg_ring[mbox].size = entries;
2215 priv->imsg_ring[mbox].rx_slot = 0;
2216 priv->imsg_ring[mbox].desc_rdptr = 0;
2217 priv->imsg_ring[mbox].fq_wrptr = 0;
2218 for (i = 0; i < priv->imsg_ring[mbox].size; i++)
2219 priv->imsg_ring[mbox].imq_base[i] = NULL;
2220 spin_lock_init(&priv->imsg_ring[mbox].lock);
2221
2222 /* Allocate buffers for incoming messages */
2223 priv->imsg_ring[mbox].buf_base =
2224 dma_alloc_coherent(&priv->pdev->dev,
2225 entries * TSI721_MSG_BUFFER_SIZE,
2226 &priv->imsg_ring[mbox].buf_phys,
2227 GFP_KERNEL);
2228
2229 if (priv->imsg_ring[mbox].buf_base == NULL) {
2230 tsi_err(&priv->pdev->dev,
2231 "Failed to allocate buffers for IB MBOX%d", mbox);
2232 rc = -ENOMEM;
2233 goto out;
2234 }
2235
2236 /* Allocate memory for circular free list */
2237 priv->imsg_ring[mbox].imfq_base =
2238 dma_alloc_coherent(&priv->pdev->dev,
2239 entries * 8,
2240 &priv->imsg_ring[mbox].imfq_phys,
2241 GFP_KERNEL);
2242
2243 if (priv->imsg_ring[mbox].imfq_base == NULL) {
2244 tsi_err(&priv->pdev->dev,
2245 "Failed to allocate free queue for IB MBOX%d", mbox);
2246 rc = -ENOMEM;
2247 goto out_buf;
2248 }
2249
2250 /* Allocate memory for Inbound message descriptors */
2251 priv->imsg_ring[mbox].imd_base =
2252 dma_alloc_coherent(&priv->pdev->dev,
2253 entries * sizeof(struct tsi721_imsg_desc),
2254 &priv->imsg_ring[mbox].imd_phys, GFP_KERNEL);
2255
2256 if (priv->imsg_ring[mbox].imd_base == NULL) {
2257 tsi_err(&priv->pdev->dev,
2258 "Failed to allocate descriptor memory for IB MBOX%d",
2259 mbox);
2260 rc = -ENOMEM;
2261 goto out_dma;
2262 }
2263
2264 /* Fill free buffer pointer list */
2265 free_ptr = priv->imsg_ring[mbox].imfq_base;
2266 for (i = 0; i < entries; i++)
2267 free_ptr[i] = cpu_to_le64(
2268 (u64)(priv->imsg_ring[mbox].buf_phys) +
2269 i * 0x1000);
2270
2271 mb();
2272
2273 /*
2274 * For mapping of inbound SRIO Messages into appropriate queues we need
2275 * to set Inbound Device ID register in the messaging engine. We do it
2276 * once when first inbound mailbox is requested.
2277 */
2278 if (!(priv->flags & TSI721_IMSGID_SET)) {
2279 iowrite32((u32)priv->mport.host_deviceid,
2280 priv->regs + TSI721_IB_DEVID);
2281 priv->flags |= TSI721_IMSGID_SET;
2282 }
2283
2284 /*
2285 * Configure Inbound Messaging channel (ch = mbox + 4)
2286 */
2287
2288 /* Setup Inbound Message free queue */
2289 iowrite32(((u64)priv->imsg_ring[mbox].imfq_phys >> 32),
2290 priv->regs + TSI721_IBDMAC_FQBH(ch));
2291 iowrite32(((u64)priv->imsg_ring[mbox].imfq_phys &
2292 TSI721_IBDMAC_FQBL_MASK),
2293 priv->regs+TSI721_IBDMAC_FQBL(ch));
2294 iowrite32(TSI721_DMAC_DSSZ_SIZE(entries),
2295 priv->regs + TSI721_IBDMAC_FQSZ(ch));
2296
2297 /* Setup Inbound Message descriptor queue */
2298 iowrite32(((u64)priv->imsg_ring[mbox].imd_phys >> 32),
2299 priv->regs + TSI721_IBDMAC_DQBH(ch));
2300 iowrite32(((u32)priv->imsg_ring[mbox].imd_phys &
2301 (u32)TSI721_IBDMAC_DQBL_MASK),
2302 priv->regs+TSI721_IBDMAC_DQBL(ch));
2303 iowrite32(TSI721_DMAC_DSSZ_SIZE(entries),
2304 priv->regs + TSI721_IBDMAC_DQSZ(ch));
2305
2306 /* Enable interrupts */
2307
2308#ifdef CONFIG_PCI_MSI
2309 if (priv->flags & TSI721_USING_MSIX) {
2310 int idx = TSI721_VECT_IMB0_RCV + mbox;
2311
2312 /* Request interrupt service if we are in MSI-X mode */
2313 rc = request_irq(priv->msix[idx].vector, tsi721_imsg_msix, 0,
2314 priv->msix[idx].irq_name, (void *)priv);
2315
2316 if (rc) {
2317 tsi_debug(IMSG, &priv->pdev->dev,
2318 "Unable to get MSI-X IRQ for IBOX%d-DONE",
2319 mbox);
2320 goto out_desc;
2321 }
2322
2323 idx = TSI721_VECT_IMB0_INT + mbox;
2324 rc = request_irq(priv->msix[idx].vector, tsi721_imsg_msix, 0,
2325 priv->msix[idx].irq_name, (void *)priv);
2326
2327 if (rc) {
2328 tsi_debug(IMSG, &priv->pdev->dev,
2329 "Unable to get MSI-X IRQ for IBOX%d-INT", mbox);
2330 free_irq(
2331 priv->msix[TSI721_VECT_IMB0_RCV + mbox].vector,
2332 (void *)priv);
2333 goto out_desc;
2334 }
2335 }
2336#endif /* CONFIG_PCI_MSI */
2337
2338 tsi721_imsg_interrupt_enable(priv, ch, TSI721_IBDMAC_INT_ALL);
2339
2340 /* Initialize Inbound Message Engine */
2341 iowrite32(TSI721_IBDMAC_CTL_INIT, priv->regs + TSI721_IBDMAC_CTL(ch));
2342 ioread32(priv->regs + TSI721_IBDMAC_CTL(ch));
2343 udelay(10);
2344 priv->imsg_ring[mbox].fq_wrptr = entries - 1;
2345 iowrite32(entries - 1, priv->regs + TSI721_IBDMAC_FQWP(ch));
2346
2347 priv->imsg_init[mbox] = 1;
2348 return 0;
2349
2350#ifdef CONFIG_PCI_MSI
2351out_desc:
2352 dma_free_coherent(&priv->pdev->dev,
2353 priv->imsg_ring[mbox].size * sizeof(struct tsi721_imsg_desc),
2354 priv->imsg_ring[mbox].imd_base,
2355 priv->imsg_ring[mbox].imd_phys);
2356
2357 priv->imsg_ring[mbox].imd_base = NULL;
2358#endif /* CONFIG_PCI_MSI */
2359
2360out_dma:
2361 dma_free_coherent(&priv->pdev->dev,
2362 priv->imsg_ring[mbox].size * 8,
2363 priv->imsg_ring[mbox].imfq_base,
2364 priv->imsg_ring[mbox].imfq_phys);
2365
2366 priv->imsg_ring[mbox].imfq_base = NULL;
2367
2368out_buf:
2369 dma_free_coherent(&priv->pdev->dev,
2370 priv->imsg_ring[mbox].size * TSI721_MSG_BUFFER_SIZE,
2371 priv->imsg_ring[mbox].buf_base,
2372 priv->imsg_ring[mbox].buf_phys);
2373
2374 priv->imsg_ring[mbox].buf_base = NULL;
2375
2376out:
2377 return rc;
2378}
2379
2380/**
2381 * tsi721_close_inb_mbox - Shut down Tsi721 inbound mailbox
2382 * @mport: Master port implementing the Inbound Messaging Engine
2383 * @mbox: Mailbox to close
2384 */
2385static void tsi721_close_inb_mbox(struct rio_mport *mport, int mbox)
2386{
2387 struct tsi721_device *priv = mport->priv;
2388 u32 rx_slot;
2389 int ch = mbox + 4;
2390
2391 if (!priv->imsg_init[mbox]) /* mbox isn't initialized yet */
2392 return;
2393 priv->imsg_init[mbox] = 0;
2394
2395 /* Disable Inbound Messaging Engine */
2396
2397 /* Disable Interrupts */
2398 tsi721_imsg_interrupt_disable(priv, ch, TSI721_OBDMAC_INT_MASK);
2399
2400#ifdef CONFIG_PCI_MSI
2401 if (priv->flags & TSI721_USING_MSIX) {
2402 free_irq(priv->msix[TSI721_VECT_IMB0_RCV + mbox].vector,
2403 (void *)priv);
2404 free_irq(priv->msix[TSI721_VECT_IMB0_INT + mbox].vector,
2405 (void *)priv);
2406 }
2407#endif /* CONFIG_PCI_MSI */
2408
2409 /* Clear Inbound Buffer Queue */
2410 for (rx_slot = 0; rx_slot < priv->imsg_ring[mbox].size; rx_slot++)
2411 priv->imsg_ring[mbox].imq_base[rx_slot] = NULL;
2412
2413 /* Free memory allocated for message buffers */
2414 dma_free_coherent(&priv->pdev->dev,
2415 priv->imsg_ring[mbox].size * TSI721_MSG_BUFFER_SIZE,
2416 priv->imsg_ring[mbox].buf_base,
2417 priv->imsg_ring[mbox].buf_phys);
2418
2419 priv->imsg_ring[mbox].buf_base = NULL;
2420
2421 /* Free memory allocated for free pointr list */
2422 dma_free_coherent(&priv->pdev->dev,
2423 priv->imsg_ring[mbox].size * 8,
2424 priv->imsg_ring[mbox].imfq_base,
2425 priv->imsg_ring[mbox].imfq_phys);
2426
2427 priv->imsg_ring[mbox].imfq_base = NULL;
2428
2429 /* Free memory allocated for RX descriptors */
2430 dma_free_coherent(&priv->pdev->dev,
2431 priv->imsg_ring[mbox].size * sizeof(struct tsi721_imsg_desc),
2432 priv->imsg_ring[mbox].imd_base,
2433 priv->imsg_ring[mbox].imd_phys);
2434
2435 priv->imsg_ring[mbox].imd_base = NULL;
2436}
2437
2438/**
2439 * tsi721_add_inb_buffer - Add buffer to the Tsi721 inbound message queue
2440 * @mport: Master port implementing the Inbound Messaging Engine
2441 * @mbox: Inbound mailbox number
2442 * @buf: Buffer to add to inbound queue
2443 *
2444 * Returns: %0 on success or -errno value on failure.
2445 */
2446static int tsi721_add_inb_buffer(struct rio_mport *mport, int mbox, void *buf)
2447{
2448 struct tsi721_device *priv = mport->priv;
2449 u32 rx_slot;
2450 int rc = 0;
2451
2452 rx_slot = priv->imsg_ring[mbox].rx_slot;
2453 if (priv->imsg_ring[mbox].imq_base[rx_slot]) {
2454 tsi_err(&priv->pdev->dev,
2455 "Error adding inbound buffer %d, buffer exists",
2456 rx_slot);
2457 rc = -EINVAL;
2458 goto out;
2459 }
2460
2461 priv->imsg_ring[mbox].imq_base[rx_slot] = buf;
2462
2463 if (++priv->imsg_ring[mbox].rx_slot == priv->imsg_ring[mbox].size)
2464 priv->imsg_ring[mbox].rx_slot = 0;
2465
2466out:
2467 return rc;
2468}
2469
2470/**
2471 * tsi721_get_inb_message - Fetch inbound message from the Tsi721 MSG Queue
2472 * @mport: Master port implementing the Inbound Messaging Engine
2473 * @mbox: Inbound mailbox number
2474 *
2475 * Returns: pointer to the message on success or %NULL on failure.
2476 */
2477static void *tsi721_get_inb_message(struct rio_mport *mport, int mbox)
2478{
2479 struct tsi721_device *priv = mport->priv;
2480 struct tsi721_imsg_desc *desc;
2481 u32 rx_slot;
2482 void *rx_virt = NULL;
2483 u64 rx_phys;
2484 void *buf = NULL;
2485 u64 *free_ptr;
2486 int ch = mbox + 4;
2487 int msg_size;
2488
2489 if (!priv->imsg_init[mbox])
2490 return NULL;
2491
2492 desc = priv->imsg_ring[mbox].imd_base;
2493 desc += priv->imsg_ring[mbox].desc_rdptr;
2494
2495 if (!(le32_to_cpu(desc->msg_info) & TSI721_IMD_HO))
2496 goto out;
2497
2498 rx_slot = priv->imsg_ring[mbox].rx_slot;
2499 while (priv->imsg_ring[mbox].imq_base[rx_slot] == NULL) {
2500 if (++rx_slot == priv->imsg_ring[mbox].size)
2501 rx_slot = 0;
2502 }
2503
2504 rx_phys = ((u64)le32_to_cpu(desc->bufptr_hi) << 32) |
2505 le32_to_cpu(desc->bufptr_lo);
2506
2507 rx_virt = priv->imsg_ring[mbox].buf_base +
2508 (rx_phys - (u64)priv->imsg_ring[mbox].buf_phys);
2509
2510 buf = priv->imsg_ring[mbox].imq_base[rx_slot];
2511 msg_size = le32_to_cpu(desc->msg_info) & TSI721_IMD_BCOUNT;
2512 if (msg_size == 0)
2513 msg_size = RIO_MAX_MSG_SIZE;
2514
2515 memcpy(buf, rx_virt, msg_size);
2516 priv->imsg_ring[mbox].imq_base[rx_slot] = NULL;
2517
2518 desc->msg_info &= cpu_to_le32(~TSI721_IMD_HO);
2519 if (++priv->imsg_ring[mbox].desc_rdptr == priv->imsg_ring[mbox].size)
2520 priv->imsg_ring[mbox].desc_rdptr = 0;
2521
2522 iowrite32(priv->imsg_ring[mbox].desc_rdptr,
2523 priv->regs + TSI721_IBDMAC_DQRP(ch));
2524
2525 /* Return free buffer into the pointer list */
2526 free_ptr = priv->imsg_ring[mbox].imfq_base;
2527 free_ptr[priv->imsg_ring[mbox].fq_wrptr] = cpu_to_le64(rx_phys);
2528
2529 if (++priv->imsg_ring[mbox].fq_wrptr == priv->imsg_ring[mbox].size)
2530 priv->imsg_ring[mbox].fq_wrptr = 0;
2531
2532 iowrite32(priv->imsg_ring[mbox].fq_wrptr,
2533 priv->regs + TSI721_IBDMAC_FQWP(ch));
2534out:
2535 return buf;
2536}
2537
2538/**
2539 * tsi721_messages_init - Initialization of Messaging Engine
2540 * @priv: pointer to tsi721 private data
2541 *
2542 * Configures Tsi721 messaging engine.
2543 *
2544 * Returns: %0
2545 */
2546static int tsi721_messages_init(struct tsi721_device *priv)
2547{
2548 int ch;
2549
2550 iowrite32(0, priv->regs + TSI721_SMSG_ECC_LOG);
2551 iowrite32(0, priv->regs + TSI721_RETRY_GEN_CNT);
2552 iowrite32(0, priv->regs + TSI721_RETRY_RX_CNT);
2553
2554 /* Set SRIO Message Request/Response Timeout */
2555 iowrite32(TSI721_RQRPTO_VAL, priv->regs + TSI721_RQRPTO);
2556
2557 /* Initialize Inbound Messaging Engine Registers */
2558 for (ch = 0; ch < TSI721_IMSG_CHNUM; ch++) {
2559 /* Clear interrupt bits */
2560 iowrite32(TSI721_IBDMAC_INT_MASK,
2561 priv->regs + TSI721_IBDMAC_INT(ch));
2562 /* Clear Status */
2563 iowrite32(0, priv->regs + TSI721_IBDMAC_STS(ch));
2564
2565 iowrite32(TSI721_SMSG_ECC_COR_LOG_MASK,
2566 priv->regs + TSI721_SMSG_ECC_COR_LOG(ch));
2567 iowrite32(TSI721_SMSG_ECC_NCOR_MASK,
2568 priv->regs + TSI721_SMSG_ECC_NCOR(ch));
2569 }
2570
2571 return 0;
2572}
2573
2574/**
2575 * tsi721_query_mport - Fetch inbound message from the Tsi721 MSG Queue
2576 * @mport: Master port implementing the Inbound Messaging Engine
2577 * @attr: mport device attributes
2578 *
2579 * Returns: pointer to the message on success or %NULL on failure.
2580 */
2581static int tsi721_query_mport(struct rio_mport *mport,
2582 struct rio_mport_attr *attr)
2583{
2584 struct tsi721_device *priv = mport->priv;
2585 u32 rval;
2586
2587 rval = ioread32(priv->regs + 0x100 + RIO_PORT_N_ERR_STS_CSR(0, 0));
2588 if (rval & RIO_PORT_N_ERR_STS_PORT_OK) {
2589 rval = ioread32(priv->regs + 0x100 + RIO_PORT_N_CTL2_CSR(0, 0));
2590 attr->link_speed = (rval & RIO_PORT_N_CTL2_SEL_BAUD) >> 28;
2591 rval = ioread32(priv->regs + 0x100 + RIO_PORT_N_CTL_CSR(0, 0));
2592 attr->link_width = (rval & RIO_PORT_N_CTL_IPW) >> 27;
2593 } else
2594 attr->link_speed = RIO_LINK_DOWN;
2595
2596#ifdef CONFIG_RAPIDIO_DMA_ENGINE
2597 attr->flags = RIO_MPORT_DMA | RIO_MPORT_DMA_SG;
2598 attr->dma_max_sge = 0;
2599 attr->dma_max_size = TSI721_BDMA_MAX_BCOUNT;
2600 attr->dma_align = 0;
2601#else
2602 attr->flags = 0;
2603#endif
2604 return 0;
2605}
2606
2607/**
2608 * tsi721_disable_ints - disables all device interrupts
2609 * @priv: pointer to tsi721 private data
2610 */
2611static void tsi721_disable_ints(struct tsi721_device *priv)
2612{
2613 int ch;
2614
2615 /* Disable all device level interrupts */
2616 iowrite32(0, priv->regs + TSI721_DEV_INTE);
2617
2618 /* Disable all Device Channel interrupts */
2619 iowrite32(0, priv->regs + TSI721_DEV_CHAN_INTE);
2620
2621 /* Disable all Inbound Msg Channel interrupts */
2622 for (ch = 0; ch < TSI721_IMSG_CHNUM; ch++)
2623 iowrite32(0, priv->regs + TSI721_IBDMAC_INTE(ch));
2624
2625 /* Disable all Outbound Msg Channel interrupts */
2626 for (ch = 0; ch < TSI721_OMSG_CHNUM; ch++)
2627 iowrite32(0, priv->regs + TSI721_OBDMAC_INTE(ch));
2628
2629 /* Disable all general messaging interrupts */
2630 iowrite32(0, priv->regs + TSI721_SMSG_INTE);
2631
2632 /* Disable all BDMA Channel interrupts */
2633 for (ch = 0; ch < TSI721_DMA_MAXCH; ch++)
2634 iowrite32(0,
2635 priv->regs + TSI721_DMAC_BASE(ch) + TSI721_DMAC_INTE);
2636
2637 /* Disable all general BDMA interrupts */
2638 iowrite32(0, priv->regs + TSI721_BDMA_INTE);
2639
2640 /* Disable all SRIO Channel interrupts */
2641 for (ch = 0; ch < TSI721_SRIO_MAXCH; ch++)
2642 iowrite32(0, priv->regs + TSI721_SR_CHINTE(ch));
2643
2644 /* Disable all general SR2PC interrupts */
2645 iowrite32(0, priv->regs + TSI721_SR2PC_GEN_INTE);
2646
2647 /* Disable all PC2SR interrupts */
2648 iowrite32(0, priv->regs + TSI721_PC2SR_INTE);
2649
2650 /* Disable all I2C interrupts */
2651 iowrite32(0, priv->regs + TSI721_I2C_INT_ENABLE);
2652
2653 /* Disable SRIO MAC interrupts */
2654 iowrite32(0, priv->regs + TSI721_RIO_EM_INT_ENABLE);
2655 iowrite32(0, priv->regs + TSI721_RIO_EM_DEV_INT_EN);
2656}
2657
2658static struct rio_ops tsi721_rio_ops = {
2659 .lcread = tsi721_lcread,
2660 .lcwrite = tsi721_lcwrite,
2661 .cread = tsi721_cread_dma,
2662 .cwrite = tsi721_cwrite_dma,
2663 .dsend = tsi721_dsend,
2664 .open_inb_mbox = tsi721_open_inb_mbox,
2665 .close_inb_mbox = tsi721_close_inb_mbox,
2666 .open_outb_mbox = tsi721_open_outb_mbox,
2667 .close_outb_mbox = tsi721_close_outb_mbox,
2668 .add_outb_message = tsi721_add_outb_message,
2669 .add_inb_buffer = tsi721_add_inb_buffer,
2670 .get_inb_message = tsi721_get_inb_message,
2671 .map_inb = tsi721_rio_map_inb_mem,
2672 .unmap_inb = tsi721_rio_unmap_inb_mem,
2673 .pwenable = tsi721_pw_enable,
2674 .query_mport = tsi721_query_mport,
2675 .map_outb = tsi721_map_outb_win,
2676 .unmap_outb = tsi721_unmap_outb_win,
2677};
2678
2679static void tsi721_mport_release(struct device *dev)
2680{
2681 struct rio_mport *mport = to_rio_mport(dev);
2682
2683 tsi_debug(EXIT, dev, "%s id=%d", mport->name, mport->id);
2684}
2685
2686/**
2687 * tsi721_setup_mport - Setup Tsi721 as RapidIO subsystem master port
2688 * @priv: pointer to tsi721 private data
2689 *
2690 * Configures Tsi721 as RapidIO master port.
2691 *
2692 * Returns: %0 on success or -errno value on failure.
2693 */
2694static int tsi721_setup_mport(struct tsi721_device *priv)
2695{
2696 struct pci_dev *pdev = priv->pdev;
2697 int err = 0;
2698 struct rio_mport *mport = &priv->mport;
2699
2700 err = rio_mport_initialize(mport);
2701 if (err)
2702 return err;
2703
2704 mport->ops = &tsi721_rio_ops;
2705 mport->index = 0;
2706 mport->sys_size = 0; /* small system */
2707 mport->priv = (void *)priv;
2708 mport->phys_efptr = 0x100;
2709 mport->phys_rmap = 1;
2710 mport->dev.parent = &pdev->dev;
2711 mport->dev.release = tsi721_mport_release;
2712
2713 INIT_LIST_HEAD(&mport->dbells);
2714
2715 rio_init_dbell_res(&mport->riores[RIO_DOORBELL_RESOURCE], 0, 0xffff);
2716 rio_init_mbox_res(&mport->riores[RIO_INB_MBOX_RESOURCE], 0, 3);
2717 rio_init_mbox_res(&mport->riores[RIO_OUTB_MBOX_RESOURCE], 0, 3);
2718 snprintf(mport->name, RIO_MAX_MPORT_NAME, "%s(%s)",
2719 dev_driver_string(&pdev->dev), dev_name(&pdev->dev));
2720
2721 /* Hook up interrupt handler */
2722
2723#ifdef CONFIG_PCI_MSI
2724 if (!tsi721_enable_msix(priv))
2725 priv->flags |= TSI721_USING_MSIX;
2726 else if (!pci_enable_msi(pdev))
2727 priv->flags |= TSI721_USING_MSI;
2728 else
2729 tsi_debug(MPORT, &pdev->dev,
2730 "MSI/MSI-X is not available. Using legacy INTx.");
2731#endif /* CONFIG_PCI_MSI */
2732
2733 err = tsi721_request_irq(priv);
2734
2735 if (err) {
2736 tsi_err(&pdev->dev, "Unable to get PCI IRQ %02X (err=0x%x)",
2737 pdev->irq, err);
2738 return err;
2739 }
2740
2741#ifdef CONFIG_RAPIDIO_DMA_ENGINE
2742 err = tsi721_register_dma(priv);
2743 if (err)
2744 goto err_exit;
2745#endif
2746 /* Enable SRIO link */
2747 iowrite32(ioread32(priv->regs + TSI721_DEVCTL) |
2748 TSI721_DEVCTL_SRBOOT_CMPL,
2749 priv->regs + TSI721_DEVCTL);
2750
2751 if (mport->host_deviceid >= 0)
2752 iowrite32(RIO_PORT_GEN_HOST | RIO_PORT_GEN_MASTER |
2753 RIO_PORT_GEN_DISCOVERED,
2754 priv->regs + (0x100 + RIO_PORT_GEN_CTL_CSR));
2755 else
2756 iowrite32(0, priv->regs + (0x100 + RIO_PORT_GEN_CTL_CSR));
2757
2758 err = rio_register_mport(mport);
2759 if (err) {
2760 tsi721_unregister_dma(priv);
2761 goto err_exit;
2762 }
2763
2764 return 0;
2765
2766err_exit:
2767 tsi721_free_irq(priv);
2768 return err;
2769}
2770
2771static int tsi721_probe(struct pci_dev *pdev,
2772 const struct pci_device_id *id)
2773{
2774 struct tsi721_device *priv;
2775 int err;
2776
2777 priv = kzalloc(sizeof(struct tsi721_device), GFP_KERNEL);
2778 if (!priv) {
2779 err = -ENOMEM;
2780 goto err_exit;
2781 }
2782
2783 err = pci_enable_device(pdev);
2784 if (err) {
2785 tsi_err(&pdev->dev, "Failed to enable PCI device");
2786 goto err_clean;
2787 }
2788
2789 priv->pdev = pdev;
2790
2791#ifdef DEBUG
2792 {
2793 int i;
2794
2795 for (i = 0; i < PCI_STD_NUM_BARS; i++) {
2796 tsi_debug(INIT, &pdev->dev, "res%d %pR",
2797 i, &pdev->resource[i]);
2798 }
2799 }
2800#endif
2801 /*
2802 * Verify BAR configuration
2803 */
2804
2805 /* BAR_0 (registers) must be 512KB+ in 32-bit address space */
2806 if (!(pci_resource_flags(pdev, BAR_0) & IORESOURCE_MEM) ||
2807 pci_resource_flags(pdev, BAR_0) & IORESOURCE_MEM_64 ||
2808 pci_resource_len(pdev, BAR_0) < TSI721_REG_SPACE_SIZE) {
2809 tsi_err(&pdev->dev, "Missing or misconfigured CSR BAR0");
2810 err = -ENODEV;
2811 goto err_disable_pdev;
2812 }
2813
2814 /* BAR_1 (outbound doorbells) must be 16MB+ in 32-bit address space */
2815 if (!(pci_resource_flags(pdev, BAR_1) & IORESOURCE_MEM) ||
2816 pci_resource_flags(pdev, BAR_1) & IORESOURCE_MEM_64 ||
2817 pci_resource_len(pdev, BAR_1) < TSI721_DB_WIN_SIZE) {
2818 tsi_err(&pdev->dev, "Missing or misconfigured Doorbell BAR1");
2819 err = -ENODEV;
2820 goto err_disable_pdev;
2821 }
2822
2823 /*
2824 * BAR_2 and BAR_4 (outbound translation) must be in 64-bit PCIe address
2825 * space.
2826 * NOTE: BAR_2 and BAR_4 are not used by this version of driver.
2827 * It may be a good idea to keep them disabled using HW configuration
2828 * to save PCI memory space.
2829 */
2830
2831 priv->p2r_bar[0].size = priv->p2r_bar[1].size = 0;
2832
2833 if (pci_resource_flags(pdev, BAR_2) & IORESOURCE_MEM_64) {
2834 if (pci_resource_flags(pdev, BAR_2) & IORESOURCE_PREFETCH)
2835 tsi_debug(INIT, &pdev->dev,
2836 "Prefetchable OBW BAR2 will not be used");
2837 else {
2838 priv->p2r_bar[0].base = pci_resource_start(pdev, BAR_2);
2839 priv->p2r_bar[0].size = pci_resource_len(pdev, BAR_2);
2840 }
2841 }
2842
2843 if (pci_resource_flags(pdev, BAR_4) & IORESOURCE_MEM_64) {
2844 if (pci_resource_flags(pdev, BAR_4) & IORESOURCE_PREFETCH)
2845 tsi_debug(INIT, &pdev->dev,
2846 "Prefetchable OBW BAR4 will not be used");
2847 else {
2848 priv->p2r_bar[1].base = pci_resource_start(pdev, BAR_4);
2849 priv->p2r_bar[1].size = pci_resource_len(pdev, BAR_4);
2850 }
2851 }
2852
2853 err = pci_request_regions(pdev, DRV_NAME);
2854 if (err) {
2855 tsi_err(&pdev->dev, "Unable to obtain PCI resources");
2856 goto err_disable_pdev;
2857 }
2858
2859 pci_set_master(pdev);
2860
2861 priv->regs = pci_ioremap_bar(pdev, BAR_0);
2862 if (!priv->regs) {
2863 tsi_err(&pdev->dev, "Unable to map device registers space");
2864 err = -ENOMEM;
2865 goto err_free_res;
2866 }
2867
2868 priv->odb_base = pci_ioremap_bar(pdev, BAR_1);
2869 if (!priv->odb_base) {
2870 tsi_err(&pdev->dev, "Unable to map outbound doorbells space");
2871 err = -ENOMEM;
2872 goto err_unmap_bars;
2873 }
2874
2875 /* Configure DMA attributes. */
2876 if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) {
2877 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
2878 if (err) {
2879 tsi_err(&pdev->dev, "Unable to set DMA mask");
2880 goto err_unmap_bars;
2881 }
2882
2883 if (dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)))
2884 tsi_info(&pdev->dev, "Unable to set consistent DMA mask");
2885 } else {
2886 err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
2887 if (err)
2888 tsi_info(&pdev->dev, "Unable to set consistent DMA mask");
2889 }
2890
2891 BUG_ON(!pci_is_pcie(pdev));
2892
2893 /* Clear "no snoop" and "relaxed ordering" bits. */
2894 pcie_capability_clear_and_set_word(pdev, PCI_EXP_DEVCTL,
2895 PCI_EXP_DEVCTL_RELAX_EN | PCI_EXP_DEVCTL_NOSNOOP_EN, 0);
2896
2897 /* Override PCIe Maximum Read Request Size setting if requested */
2898 if (pcie_mrrs >= 0) {
2899 if (pcie_mrrs <= 5)
2900 pcie_capability_clear_and_set_word(pdev, PCI_EXP_DEVCTL,
2901 PCI_EXP_DEVCTL_READRQ, pcie_mrrs << 12);
2902 else
2903 tsi_info(&pdev->dev,
2904 "Invalid MRRS override value %d", pcie_mrrs);
2905 }
2906
2907 /* Set PCIe completion timeout to 1-10ms */
2908 pcie_capability_clear_and_set_word(pdev, PCI_EXP_DEVCTL2,
2909 PCI_EXP_DEVCTL2_COMP_TIMEOUT, 0x2);
2910
2911 /*
2912 * FIXUP: correct offsets of MSI-X tables in the MSI-X Capability Block
2913 */
2914 pci_write_config_dword(pdev, TSI721_PCIECFG_EPCTL, 0x01);
2915 pci_write_config_dword(pdev, TSI721_PCIECFG_MSIXTBL,
2916 TSI721_MSIXTBL_OFFSET);
2917 pci_write_config_dword(pdev, TSI721_PCIECFG_MSIXPBA,
2918 TSI721_MSIXPBA_OFFSET);
2919 pci_write_config_dword(pdev, TSI721_PCIECFG_EPCTL, 0);
2920 /* End of FIXUP */
2921
2922 tsi721_disable_ints(priv);
2923
2924 tsi721_init_pc2sr_mapping(priv);
2925 tsi721_init_sr2pc_mapping(priv);
2926
2927 if (tsi721_bdma_maint_init(priv)) {
2928 tsi_err(&pdev->dev, "BDMA initialization failed");
2929 err = -ENOMEM;
2930 goto err_unmap_bars;
2931 }
2932
2933 err = tsi721_doorbell_init(priv);
2934 if (err)
2935 goto err_free_bdma;
2936
2937 tsi721_port_write_init(priv);
2938
2939 err = tsi721_messages_init(priv);
2940 if (err)
2941 goto err_free_consistent;
2942
2943 err = tsi721_setup_mport(priv);
2944 if (err)
2945 goto err_free_consistent;
2946
2947 pci_set_drvdata(pdev, priv);
2948 tsi721_interrupts_init(priv);
2949
2950 return 0;
2951
2952err_free_consistent:
2953 tsi721_port_write_free(priv);
2954 tsi721_doorbell_free(priv);
2955err_free_bdma:
2956 tsi721_bdma_maint_free(priv);
2957err_unmap_bars:
2958 if (priv->regs)
2959 iounmap(priv->regs);
2960 if (priv->odb_base)
2961 iounmap(priv->odb_base);
2962err_free_res:
2963 pci_release_regions(pdev);
2964err_disable_pdev:
2965 pci_disable_device(pdev);
2966err_clean:
2967 kfree(priv);
2968err_exit:
2969 return err;
2970}
2971
2972static void tsi721_remove(struct pci_dev *pdev)
2973{
2974 struct tsi721_device *priv = pci_get_drvdata(pdev);
2975
2976 tsi_debug(EXIT, &pdev->dev, "enter");
2977
2978 tsi721_disable_ints(priv);
2979 tsi721_free_irq(priv);
2980 flush_work(&priv->idb_work);
2981 flush_work(&priv->pw_work);
2982 rio_unregister_mport(&priv->mport);
2983
2984 tsi721_unregister_dma(priv);
2985 tsi721_bdma_maint_free(priv);
2986 tsi721_doorbell_free(priv);
2987 tsi721_port_write_free(priv);
2988 tsi721_close_sr2pc_mapping(priv);
2989
2990 if (priv->regs)
2991 iounmap(priv->regs);
2992 if (priv->odb_base)
2993 iounmap(priv->odb_base);
2994#ifdef CONFIG_PCI_MSI
2995 if (priv->flags & TSI721_USING_MSIX)
2996 pci_disable_msix(priv->pdev);
2997 else if (priv->flags & TSI721_USING_MSI)
2998 pci_disable_msi(priv->pdev);
2999#endif
3000 pci_release_regions(pdev);
3001 pci_disable_device(pdev);
3002 pci_set_drvdata(pdev, NULL);
3003 kfree(priv);
3004 tsi_debug(EXIT, &pdev->dev, "exit");
3005}
3006
3007static void tsi721_shutdown(struct pci_dev *pdev)
3008{
3009 struct tsi721_device *priv = pci_get_drvdata(pdev);
3010
3011 tsi_debug(EXIT, &pdev->dev, "enter");
3012
3013 tsi721_disable_ints(priv);
3014 tsi721_dma_stop_all(priv);
3015 pci_disable_device(pdev);
3016}
3017
3018static const struct pci_device_id tsi721_pci_tbl[] = {
3019 { PCI_DEVICE(PCI_VENDOR_ID_IDT, PCI_DEVICE_ID_TSI721) },
3020 { 0, } /* terminate list */
3021};
3022
3023MODULE_DEVICE_TABLE(pci, tsi721_pci_tbl);
3024
3025static struct pci_driver tsi721_driver = {
3026 .name = "tsi721",
3027 .id_table = tsi721_pci_tbl,
3028 .probe = tsi721_probe,
3029 .remove = tsi721_remove,
3030 .shutdown = tsi721_shutdown,
3031};
3032
3033module_pci_driver(tsi721_driver);
3034
3035MODULE_DESCRIPTION("IDT Tsi721 PCIExpress-to-SRIO bridge driver");
3036MODULE_AUTHOR("Integrated Device Technology, Inc.");
3037MODULE_LICENSE("GPL");
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * RapidIO mport driver for Tsi721 PCIExpress-to-SRIO bridge
4 *
5 * Copyright 2011 Integrated Device Technology, Inc.
6 * Alexandre Bounine <alexandre.bounine@idt.com>
7 * Chul Kim <chul.kim@idt.com>
8 */
9
10#include <linux/io.h>
11#include <linux/errno.h>
12#include <linux/init.h>
13#include <linux/ioport.h>
14#include <linux/kernel.h>
15#include <linux/module.h>
16#include <linux/pci.h>
17#include <linux/rio.h>
18#include <linux/rio_drv.h>
19#include <linux/dma-mapping.h>
20#include <linux/interrupt.h>
21#include <linux/kfifo.h>
22#include <linux/delay.h>
23
24#include "tsi721.h"
25
26#ifdef DEBUG
27u32 tsi_dbg_level;
28module_param_named(dbg_level, tsi_dbg_level, uint, S_IWUSR | S_IRUGO);
29MODULE_PARM_DESC(dbg_level, "Debugging output level (default 0 = none)");
30#endif
31
32static int pcie_mrrs = -1;
33module_param(pcie_mrrs, int, S_IRUGO);
34MODULE_PARM_DESC(pcie_mrrs, "PCIe MRRS override value (0...5)");
35
36static u8 mbox_sel = 0x0f;
37module_param(mbox_sel, byte, S_IRUGO);
38MODULE_PARM_DESC(mbox_sel,
39 "RIO Messaging MBOX Selection Mask (default: 0x0f = all)");
40
41static DEFINE_SPINLOCK(tsi721_maint_lock);
42
43static void tsi721_omsg_handler(struct tsi721_device *priv, int ch);
44static void tsi721_imsg_handler(struct tsi721_device *priv, int ch);
45
46/**
47 * tsi721_lcread - read from local SREP config space
48 * @mport: RapidIO master port info
49 * @index: ID of RapdiIO interface
50 * @offset: Offset into configuration space
51 * @len: Length (in bytes) of the maintenance transaction
52 * @data: Value to be read into
53 *
54 * Generates a local SREP space read. Returns %0 on
55 * success or %-EINVAL on failure.
56 */
57static int tsi721_lcread(struct rio_mport *mport, int index, u32 offset,
58 int len, u32 *data)
59{
60 struct tsi721_device *priv = mport->priv;
61
62 if (len != sizeof(u32))
63 return -EINVAL; /* only 32-bit access is supported */
64
65 *data = ioread32(priv->regs + offset);
66
67 return 0;
68}
69
70/**
71 * tsi721_lcwrite - write into local SREP config space
72 * @mport: RapidIO master port info
73 * @index: ID of RapdiIO interface
74 * @offset: Offset into configuration space
75 * @len: Length (in bytes) of the maintenance transaction
76 * @data: Value to be written
77 *
78 * Generates a local write into SREP configuration space. Returns %0 on
79 * success or %-EINVAL on failure.
80 */
81static int tsi721_lcwrite(struct rio_mport *mport, int index, u32 offset,
82 int len, u32 data)
83{
84 struct tsi721_device *priv = mport->priv;
85
86 if (len != sizeof(u32))
87 return -EINVAL; /* only 32-bit access is supported */
88
89 iowrite32(data, priv->regs + offset);
90
91 return 0;
92}
93
94/**
95 * tsi721_maint_dma - Helper function to generate RapidIO maintenance
96 * transactions using designated Tsi721 DMA channel.
97 * @priv: pointer to tsi721 private data
98 * @sys_size: RapdiIO transport system size
99 * @destid: Destination ID of transaction
100 * @hopcount: Number of hops to target device
101 * @offset: Offset into configuration space
102 * @len: Length (in bytes) of the maintenance transaction
103 * @data: Location to be read from or write into
104 * @do_wr: Operation flag (1 == MAINT_WR)
105 *
106 * Generates a RapidIO maintenance transaction (Read or Write).
107 * Returns %0 on success and %-EINVAL or %-EFAULT on failure.
108 */
109static int tsi721_maint_dma(struct tsi721_device *priv, u32 sys_size,
110 u16 destid, u8 hopcount, u32 offset, int len,
111 u32 *data, int do_wr)
112{
113 void __iomem *regs = priv->regs + TSI721_DMAC_BASE(priv->mdma.ch_id);
114 struct tsi721_dma_desc *bd_ptr;
115 u32 rd_count, swr_ptr, ch_stat;
116 unsigned long flags;
117 int i, err = 0;
118 u32 op = do_wr ? MAINT_WR : MAINT_RD;
119
120 if (offset > (RIO_MAINT_SPACE_SZ - len) || (len != sizeof(u32)))
121 return -EINVAL;
122
123 spin_lock_irqsave(&tsi721_maint_lock, flags);
124
125 bd_ptr = priv->mdma.bd_base;
126
127 rd_count = ioread32(regs + TSI721_DMAC_DRDCNT);
128
129 /* Initialize DMA descriptor */
130 bd_ptr[0].type_id = cpu_to_le32((DTYPE2 << 29) | (op << 19) | destid);
131 bd_ptr[0].bcount = cpu_to_le32((sys_size << 26) | 0x04);
132 bd_ptr[0].raddr_lo = cpu_to_le32((hopcount << 24) | offset);
133 bd_ptr[0].raddr_hi = 0;
134 if (do_wr)
135 bd_ptr[0].data[0] = cpu_to_be32p(data);
136 else
137 bd_ptr[0].data[0] = 0xffffffff;
138
139 mb();
140
141 /* Start DMA operation */
142 iowrite32(rd_count + 2, regs + TSI721_DMAC_DWRCNT);
143 ioread32(regs + TSI721_DMAC_DWRCNT);
144 i = 0;
145
146 /* Wait until DMA transfer is finished */
147 while ((ch_stat = ioread32(regs + TSI721_DMAC_STS))
148 & TSI721_DMAC_STS_RUN) {
149 udelay(1);
150 if (++i >= 5000000) {
151 tsi_debug(MAINT, &priv->pdev->dev,
152 "DMA[%d] read timeout ch_status=%x",
153 priv->mdma.ch_id, ch_stat);
154 if (!do_wr)
155 *data = 0xffffffff;
156 err = -EIO;
157 goto err_out;
158 }
159 }
160
161 if (ch_stat & TSI721_DMAC_STS_ABORT) {
162 /* If DMA operation aborted due to error,
163 * reinitialize DMA channel
164 */
165 tsi_debug(MAINT, &priv->pdev->dev, "DMA ABORT ch_stat=%x",
166 ch_stat);
167 tsi_debug(MAINT, &priv->pdev->dev,
168 "OP=%d : destid=%x hc=%x off=%x",
169 do_wr ? MAINT_WR : MAINT_RD,
170 destid, hopcount, offset);
171 iowrite32(TSI721_DMAC_INT_ALL, regs + TSI721_DMAC_INT);
172 iowrite32(TSI721_DMAC_CTL_INIT, regs + TSI721_DMAC_CTL);
173 udelay(10);
174 iowrite32(0, regs + TSI721_DMAC_DWRCNT);
175 udelay(1);
176 if (!do_wr)
177 *data = 0xffffffff;
178 err = -EIO;
179 goto err_out;
180 }
181
182 if (!do_wr)
183 *data = be32_to_cpu(bd_ptr[0].data[0]);
184
185 /*
186 * Update descriptor status FIFO RD pointer.
187 * NOTE: Skipping check and clear FIFO entries because we are waiting
188 * for transfer to be completed.
189 */
190 swr_ptr = ioread32(regs + TSI721_DMAC_DSWP);
191 iowrite32(swr_ptr, regs + TSI721_DMAC_DSRP);
192
193err_out:
194 spin_unlock_irqrestore(&tsi721_maint_lock, flags);
195
196 return err;
197}
198
199/**
200 * tsi721_cread_dma - Generate a RapidIO maintenance read transaction
201 * using Tsi721 BDMA engine.
202 * @mport: RapidIO master port control structure
203 * @index: ID of RapdiIO interface
204 * @destid: Destination ID of transaction
205 * @hopcount: Number of hops to target device
206 * @offset: Offset into configuration space
207 * @len: Length (in bytes) of the maintenance transaction
208 * @val: Location to be read into
209 *
210 * Generates a RapidIO maintenance read transaction.
211 * Returns %0 on success and %-EINVAL or %-EFAULT on failure.
212 */
213static int tsi721_cread_dma(struct rio_mport *mport, int index, u16 destid,
214 u8 hopcount, u32 offset, int len, u32 *data)
215{
216 struct tsi721_device *priv = mport->priv;
217
218 return tsi721_maint_dma(priv, mport->sys_size, destid, hopcount,
219 offset, len, data, 0);
220}
221
222/**
223 * tsi721_cwrite_dma - Generate a RapidIO maintenance write transaction
224 * using Tsi721 BDMA engine
225 * @mport: RapidIO master port control structure
226 * @index: ID of RapdiIO interface
227 * @destid: Destination ID of transaction
228 * @hopcount: Number of hops to target device
229 * @offset: Offset into configuration space
230 * @len: Length (in bytes) of the maintenance transaction
231 * @val: Value to be written
232 *
233 * Generates a RapidIO maintenance write transaction.
234 * Returns %0 on success and %-EINVAL or %-EFAULT on failure.
235 */
236static int tsi721_cwrite_dma(struct rio_mport *mport, int index, u16 destid,
237 u8 hopcount, u32 offset, int len, u32 data)
238{
239 struct tsi721_device *priv = mport->priv;
240 u32 temp = data;
241
242 return tsi721_maint_dma(priv, mport->sys_size, destid, hopcount,
243 offset, len, &temp, 1);
244}
245
246/**
247 * tsi721_pw_handler - Tsi721 inbound port-write interrupt handler
248 * @priv: tsi721 device private structure
249 *
250 * Handles inbound port-write interrupts. Copies PW message from an internal
251 * buffer into PW message FIFO and schedules deferred routine to process
252 * queued messages.
253 */
254static int
255tsi721_pw_handler(struct tsi721_device *priv)
256{
257 u32 pw_stat;
258 u32 pw_buf[TSI721_RIO_PW_MSG_SIZE/sizeof(u32)];
259
260
261 pw_stat = ioread32(priv->regs + TSI721_RIO_PW_RX_STAT);
262
263 if (pw_stat & TSI721_RIO_PW_RX_STAT_PW_VAL) {
264 pw_buf[0] = ioread32(priv->regs + TSI721_RIO_PW_RX_CAPT(0));
265 pw_buf[1] = ioread32(priv->regs + TSI721_RIO_PW_RX_CAPT(1));
266 pw_buf[2] = ioread32(priv->regs + TSI721_RIO_PW_RX_CAPT(2));
267 pw_buf[3] = ioread32(priv->regs + TSI721_RIO_PW_RX_CAPT(3));
268
269 /* Queue PW message (if there is room in FIFO),
270 * otherwise discard it.
271 */
272 spin_lock(&priv->pw_fifo_lock);
273 if (kfifo_avail(&priv->pw_fifo) >= TSI721_RIO_PW_MSG_SIZE)
274 kfifo_in(&priv->pw_fifo, pw_buf,
275 TSI721_RIO_PW_MSG_SIZE);
276 else
277 priv->pw_discard_count++;
278 spin_unlock(&priv->pw_fifo_lock);
279 }
280
281 /* Clear pending PW interrupts */
282 iowrite32(TSI721_RIO_PW_RX_STAT_PW_DISC | TSI721_RIO_PW_RX_STAT_PW_VAL,
283 priv->regs + TSI721_RIO_PW_RX_STAT);
284
285 schedule_work(&priv->pw_work);
286
287 return 0;
288}
289
290static void tsi721_pw_dpc(struct work_struct *work)
291{
292 struct tsi721_device *priv = container_of(work, struct tsi721_device,
293 pw_work);
294 union rio_pw_msg pwmsg;
295
296 /*
297 * Process port-write messages
298 */
299 while (kfifo_out_spinlocked(&priv->pw_fifo, (unsigned char *)&pwmsg,
300 TSI721_RIO_PW_MSG_SIZE, &priv->pw_fifo_lock)) {
301 /* Pass the port-write message to RIO core for processing */
302 rio_inb_pwrite_handler(&priv->mport, &pwmsg);
303 }
304}
305
306/**
307 * tsi721_pw_enable - enable/disable port-write interface init
308 * @mport: Master port implementing the port write unit
309 * @enable: 1=enable; 0=disable port-write message handling
310 */
311static int tsi721_pw_enable(struct rio_mport *mport, int enable)
312{
313 struct tsi721_device *priv = mport->priv;
314 u32 rval;
315
316 rval = ioread32(priv->regs + TSI721_RIO_EM_INT_ENABLE);
317
318 if (enable)
319 rval |= TSI721_RIO_EM_INT_ENABLE_PW_RX;
320 else
321 rval &= ~TSI721_RIO_EM_INT_ENABLE_PW_RX;
322
323 /* Clear pending PW interrupts */
324 iowrite32(TSI721_RIO_PW_RX_STAT_PW_DISC | TSI721_RIO_PW_RX_STAT_PW_VAL,
325 priv->regs + TSI721_RIO_PW_RX_STAT);
326 /* Update enable bits */
327 iowrite32(rval, priv->regs + TSI721_RIO_EM_INT_ENABLE);
328
329 return 0;
330}
331
332/**
333 * tsi721_dsend - Send a RapidIO doorbell
334 * @mport: RapidIO master port info
335 * @index: ID of RapidIO interface
336 * @destid: Destination ID of target device
337 * @data: 16-bit info field of RapidIO doorbell
338 *
339 * Sends a RapidIO doorbell message. Always returns %0.
340 */
341static int tsi721_dsend(struct rio_mport *mport, int index,
342 u16 destid, u16 data)
343{
344 struct tsi721_device *priv = mport->priv;
345 u32 offset;
346
347 offset = (((mport->sys_size) ? RIO_TT_CODE_16 : RIO_TT_CODE_8) << 18) |
348 (destid << 2);
349
350 tsi_debug(DBELL, &priv->pdev->dev,
351 "Send Doorbell 0x%04x to destID 0x%x", data, destid);
352 iowrite16be(data, priv->odb_base + offset);
353
354 return 0;
355}
356
357/**
358 * tsi721_dbell_handler - Tsi721 doorbell interrupt handler
359 * @priv: tsi721 device-specific data structure
360 *
361 * Handles inbound doorbell interrupts. Copies doorbell entry from an internal
362 * buffer into DB message FIFO and schedules deferred routine to process
363 * queued DBs.
364 */
365static int
366tsi721_dbell_handler(struct tsi721_device *priv)
367{
368 u32 regval;
369
370 /* Disable IDB interrupts */
371 regval = ioread32(priv->regs + TSI721_SR_CHINTE(IDB_QUEUE));
372 regval &= ~TSI721_SR_CHINT_IDBQRCV;
373 iowrite32(regval,
374 priv->regs + TSI721_SR_CHINTE(IDB_QUEUE));
375
376 schedule_work(&priv->idb_work);
377
378 return 0;
379}
380
381static void tsi721_db_dpc(struct work_struct *work)
382{
383 struct tsi721_device *priv = container_of(work, struct tsi721_device,
384 idb_work);
385 struct rio_mport *mport;
386 struct rio_dbell *dbell;
387 int found = 0;
388 u32 wr_ptr, rd_ptr;
389 u64 *idb_entry;
390 u32 regval;
391 union {
392 u64 msg;
393 u8 bytes[8];
394 } idb;
395
396 /*
397 * Process queued inbound doorbells
398 */
399 mport = &priv->mport;
400
401 wr_ptr = ioread32(priv->regs + TSI721_IDQ_WP(IDB_QUEUE)) % IDB_QSIZE;
402 rd_ptr = ioread32(priv->regs + TSI721_IDQ_RP(IDB_QUEUE)) % IDB_QSIZE;
403
404 while (wr_ptr != rd_ptr) {
405 idb_entry = (u64 *)(priv->idb_base +
406 (TSI721_IDB_ENTRY_SIZE * rd_ptr));
407 rd_ptr++;
408 rd_ptr %= IDB_QSIZE;
409 idb.msg = *idb_entry;
410 *idb_entry = 0;
411
412 /* Process one doorbell */
413 list_for_each_entry(dbell, &mport->dbells, node) {
414 if ((dbell->res->start <= DBELL_INF(idb.bytes)) &&
415 (dbell->res->end >= DBELL_INF(idb.bytes))) {
416 found = 1;
417 break;
418 }
419 }
420
421 if (found) {
422 dbell->dinb(mport, dbell->dev_id, DBELL_SID(idb.bytes),
423 DBELL_TID(idb.bytes), DBELL_INF(idb.bytes));
424 } else {
425 tsi_debug(DBELL, &priv->pdev->dev,
426 "spurious IDB sid %2.2x tid %2.2x info %4.4x",
427 DBELL_SID(idb.bytes), DBELL_TID(idb.bytes),
428 DBELL_INF(idb.bytes));
429 }
430
431 wr_ptr = ioread32(priv->regs +
432 TSI721_IDQ_WP(IDB_QUEUE)) % IDB_QSIZE;
433 }
434
435 iowrite32(rd_ptr & (IDB_QSIZE - 1),
436 priv->regs + TSI721_IDQ_RP(IDB_QUEUE));
437
438 /* Re-enable IDB interrupts */
439 regval = ioread32(priv->regs + TSI721_SR_CHINTE(IDB_QUEUE));
440 regval |= TSI721_SR_CHINT_IDBQRCV;
441 iowrite32(regval,
442 priv->regs + TSI721_SR_CHINTE(IDB_QUEUE));
443
444 wr_ptr = ioread32(priv->regs + TSI721_IDQ_WP(IDB_QUEUE)) % IDB_QSIZE;
445 if (wr_ptr != rd_ptr)
446 schedule_work(&priv->idb_work);
447}
448
449/**
450 * tsi721_irqhandler - Tsi721 interrupt handler
451 * @irq: Linux interrupt number
452 * @ptr: Pointer to interrupt-specific data (tsi721_device structure)
453 *
454 * Handles Tsi721 interrupts signaled using MSI and INTA. Checks reported
455 * interrupt events and calls an event-specific handler(s).
456 */
457static irqreturn_t tsi721_irqhandler(int irq, void *ptr)
458{
459 struct tsi721_device *priv = (struct tsi721_device *)ptr;
460 u32 dev_int;
461 u32 dev_ch_int;
462 u32 intval;
463 u32 ch_inte;
464
465 /* For MSI mode disable all device-level interrupts */
466 if (priv->flags & TSI721_USING_MSI)
467 iowrite32(0, priv->regs + TSI721_DEV_INTE);
468
469 dev_int = ioread32(priv->regs + TSI721_DEV_INT);
470 if (!dev_int)
471 return IRQ_NONE;
472
473 dev_ch_int = ioread32(priv->regs + TSI721_DEV_CHAN_INT);
474
475 if (dev_int & TSI721_DEV_INT_SR2PC_CH) {
476 /* Service SR2PC Channel interrupts */
477 if (dev_ch_int & TSI721_INT_SR2PC_CHAN(IDB_QUEUE)) {
478 /* Service Inbound Doorbell interrupt */
479 intval = ioread32(priv->regs +
480 TSI721_SR_CHINT(IDB_QUEUE));
481 if (intval & TSI721_SR_CHINT_IDBQRCV)
482 tsi721_dbell_handler(priv);
483 else
484 tsi_info(&priv->pdev->dev,
485 "Unsupported SR_CH_INT %x", intval);
486
487 /* Clear interrupts */
488 iowrite32(intval,
489 priv->regs + TSI721_SR_CHINT(IDB_QUEUE));
490 ioread32(priv->regs + TSI721_SR_CHINT(IDB_QUEUE));
491 }
492 }
493
494 if (dev_int & TSI721_DEV_INT_SMSG_CH) {
495 int ch;
496
497 /*
498 * Service channel interrupts from Messaging Engine
499 */
500
501 if (dev_ch_int & TSI721_INT_IMSG_CHAN_M) { /* Inbound Msg */
502 /* Disable signaled OB MSG Channel interrupts */
503 ch_inte = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
504 ch_inte &= ~(dev_ch_int & TSI721_INT_IMSG_CHAN_M);
505 iowrite32(ch_inte, priv->regs + TSI721_DEV_CHAN_INTE);
506
507 /*
508 * Process Inbound Message interrupt for each MBOX
509 */
510 for (ch = 4; ch < RIO_MAX_MBOX + 4; ch++) {
511 if (!(dev_ch_int & TSI721_INT_IMSG_CHAN(ch)))
512 continue;
513 tsi721_imsg_handler(priv, ch);
514 }
515 }
516
517 if (dev_ch_int & TSI721_INT_OMSG_CHAN_M) { /* Outbound Msg */
518 /* Disable signaled OB MSG Channel interrupts */
519 ch_inte = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
520 ch_inte &= ~(dev_ch_int & TSI721_INT_OMSG_CHAN_M);
521 iowrite32(ch_inte, priv->regs + TSI721_DEV_CHAN_INTE);
522
523 /*
524 * Process Outbound Message interrupts for each MBOX
525 */
526
527 for (ch = 0; ch < RIO_MAX_MBOX; ch++) {
528 if (!(dev_ch_int & TSI721_INT_OMSG_CHAN(ch)))
529 continue;
530 tsi721_omsg_handler(priv, ch);
531 }
532 }
533 }
534
535 if (dev_int & TSI721_DEV_INT_SRIO) {
536 /* Service SRIO MAC interrupts */
537 intval = ioread32(priv->regs + TSI721_RIO_EM_INT_STAT);
538 if (intval & TSI721_RIO_EM_INT_STAT_PW_RX)
539 tsi721_pw_handler(priv);
540 }
541
542#ifdef CONFIG_RAPIDIO_DMA_ENGINE
543 if (dev_int & TSI721_DEV_INT_BDMA_CH) {
544 int ch;
545
546 if (dev_ch_int & TSI721_INT_BDMA_CHAN_M) {
547 tsi_debug(DMA, &priv->pdev->dev,
548 "IRQ from DMA channel 0x%08x", dev_ch_int);
549
550 for (ch = 0; ch < TSI721_DMA_MAXCH; ch++) {
551 if (!(dev_ch_int & TSI721_INT_BDMA_CHAN(ch)))
552 continue;
553 tsi721_bdma_handler(&priv->bdma[ch]);
554 }
555 }
556 }
557#endif
558
559 /* For MSI mode re-enable device-level interrupts */
560 if (priv->flags & TSI721_USING_MSI) {
561 dev_int = TSI721_DEV_INT_SR2PC_CH | TSI721_DEV_INT_SRIO |
562 TSI721_DEV_INT_SMSG_CH | TSI721_DEV_INT_BDMA_CH;
563 iowrite32(dev_int, priv->regs + TSI721_DEV_INTE);
564 }
565
566 return IRQ_HANDLED;
567}
568
569static void tsi721_interrupts_init(struct tsi721_device *priv)
570{
571 u32 intr;
572
573 /* Enable IDB interrupts */
574 iowrite32(TSI721_SR_CHINT_ALL,
575 priv->regs + TSI721_SR_CHINT(IDB_QUEUE));
576 iowrite32(TSI721_SR_CHINT_IDBQRCV,
577 priv->regs + TSI721_SR_CHINTE(IDB_QUEUE));
578
579 /* Enable SRIO MAC interrupts */
580 iowrite32(TSI721_RIO_EM_DEV_INT_EN_INT,
581 priv->regs + TSI721_RIO_EM_DEV_INT_EN);
582
583 /* Enable interrupts from channels in use */
584#ifdef CONFIG_RAPIDIO_DMA_ENGINE
585 intr = TSI721_INT_SR2PC_CHAN(IDB_QUEUE) |
586 (TSI721_INT_BDMA_CHAN_M &
587 ~TSI721_INT_BDMA_CHAN(TSI721_DMACH_MAINT));
588#else
589 intr = TSI721_INT_SR2PC_CHAN(IDB_QUEUE);
590#endif
591 iowrite32(intr, priv->regs + TSI721_DEV_CHAN_INTE);
592
593 if (priv->flags & TSI721_USING_MSIX)
594 intr = TSI721_DEV_INT_SRIO;
595 else
596 intr = TSI721_DEV_INT_SR2PC_CH | TSI721_DEV_INT_SRIO |
597 TSI721_DEV_INT_SMSG_CH | TSI721_DEV_INT_BDMA_CH;
598
599 iowrite32(intr, priv->regs + TSI721_DEV_INTE);
600 ioread32(priv->regs + TSI721_DEV_INTE);
601}
602
603#ifdef CONFIG_PCI_MSI
604/**
605 * tsi721_omsg_msix - MSI-X interrupt handler for outbound messaging
606 * @irq: Linux interrupt number
607 * @ptr: Pointer to interrupt-specific data (tsi721_device structure)
608 *
609 * Handles outbound messaging interrupts signaled using MSI-X.
610 */
611static irqreturn_t tsi721_omsg_msix(int irq, void *ptr)
612{
613 struct tsi721_device *priv = (struct tsi721_device *)ptr;
614 int mbox;
615
616 mbox = (irq - priv->msix[TSI721_VECT_OMB0_DONE].vector) % RIO_MAX_MBOX;
617 tsi721_omsg_handler(priv, mbox);
618 return IRQ_HANDLED;
619}
620
621/**
622 * tsi721_imsg_msix - MSI-X interrupt handler for inbound messaging
623 * @irq: Linux interrupt number
624 * @ptr: Pointer to interrupt-specific data (tsi721_device structure)
625 *
626 * Handles inbound messaging interrupts signaled using MSI-X.
627 */
628static irqreturn_t tsi721_imsg_msix(int irq, void *ptr)
629{
630 struct tsi721_device *priv = (struct tsi721_device *)ptr;
631 int mbox;
632
633 mbox = (irq - priv->msix[TSI721_VECT_IMB0_RCV].vector) % RIO_MAX_MBOX;
634 tsi721_imsg_handler(priv, mbox + 4);
635 return IRQ_HANDLED;
636}
637
638/**
639 * tsi721_srio_msix - Tsi721 MSI-X SRIO MAC interrupt handler
640 * @irq: Linux interrupt number
641 * @ptr: Pointer to interrupt-specific data (tsi721_device structure)
642 *
643 * Handles Tsi721 interrupts from SRIO MAC.
644 */
645static irqreturn_t tsi721_srio_msix(int irq, void *ptr)
646{
647 struct tsi721_device *priv = (struct tsi721_device *)ptr;
648 u32 srio_int;
649
650 /* Service SRIO MAC interrupts */
651 srio_int = ioread32(priv->regs + TSI721_RIO_EM_INT_STAT);
652 if (srio_int & TSI721_RIO_EM_INT_STAT_PW_RX)
653 tsi721_pw_handler(priv);
654
655 return IRQ_HANDLED;
656}
657
658/**
659 * tsi721_sr2pc_ch_msix - Tsi721 MSI-X SR2PC Channel interrupt handler
660 * @irq: Linux interrupt number
661 * @ptr: Pointer to interrupt-specific data (tsi721_device structure)
662 *
663 * Handles Tsi721 interrupts from SR2PC Channel.
664 * NOTE: At this moment services only one SR2PC channel associated with inbound
665 * doorbells.
666 */
667static irqreturn_t tsi721_sr2pc_ch_msix(int irq, void *ptr)
668{
669 struct tsi721_device *priv = (struct tsi721_device *)ptr;
670 u32 sr_ch_int;
671
672 /* Service Inbound DB interrupt from SR2PC channel */
673 sr_ch_int = ioread32(priv->regs + TSI721_SR_CHINT(IDB_QUEUE));
674 if (sr_ch_int & TSI721_SR_CHINT_IDBQRCV)
675 tsi721_dbell_handler(priv);
676
677 /* Clear interrupts */
678 iowrite32(sr_ch_int, priv->regs + TSI721_SR_CHINT(IDB_QUEUE));
679 /* Read back to ensure that interrupt was cleared */
680 sr_ch_int = ioread32(priv->regs + TSI721_SR_CHINT(IDB_QUEUE));
681
682 return IRQ_HANDLED;
683}
684
685/**
686 * tsi721_request_msix - register interrupt service for MSI-X mode.
687 * @priv: tsi721 device-specific data structure
688 *
689 * Registers MSI-X interrupt service routines for interrupts that are active
690 * immediately after mport initialization. Messaging interrupt service routines
691 * should be registered during corresponding open requests.
692 */
693static int tsi721_request_msix(struct tsi721_device *priv)
694{
695 int err = 0;
696
697 err = request_irq(priv->msix[TSI721_VECT_IDB].vector,
698 tsi721_sr2pc_ch_msix, 0,
699 priv->msix[TSI721_VECT_IDB].irq_name, (void *)priv);
700 if (err)
701 return err;
702
703 err = request_irq(priv->msix[TSI721_VECT_PWRX].vector,
704 tsi721_srio_msix, 0,
705 priv->msix[TSI721_VECT_PWRX].irq_name, (void *)priv);
706 if (err) {
707 free_irq(priv->msix[TSI721_VECT_IDB].vector, (void *)priv);
708 return err;
709 }
710
711 return 0;
712}
713
714/**
715 * tsi721_enable_msix - Attempts to enable MSI-X support for Tsi721.
716 * @priv: pointer to tsi721 private data
717 *
718 * Configures MSI-X support for Tsi721. Supports only an exact number
719 * of requested vectors.
720 */
721static int tsi721_enable_msix(struct tsi721_device *priv)
722{
723 struct msix_entry entries[TSI721_VECT_MAX];
724 int err;
725 int i;
726
727 entries[TSI721_VECT_IDB].entry = TSI721_MSIX_SR2PC_IDBQ_RCV(IDB_QUEUE);
728 entries[TSI721_VECT_PWRX].entry = TSI721_MSIX_SRIO_MAC_INT;
729
730 /*
731 * Initialize MSI-X entries for Messaging Engine:
732 * this driver supports four RIO mailboxes (inbound and outbound)
733 * NOTE: Inbound message MBOX 0...4 use IB channels 4...7. Therefore
734 * offset +4 is added to IB MBOX number.
735 */
736 for (i = 0; i < RIO_MAX_MBOX; i++) {
737 entries[TSI721_VECT_IMB0_RCV + i].entry =
738 TSI721_MSIX_IMSG_DQ_RCV(i + 4);
739 entries[TSI721_VECT_IMB0_INT + i].entry =
740 TSI721_MSIX_IMSG_INT(i + 4);
741 entries[TSI721_VECT_OMB0_DONE + i].entry =
742 TSI721_MSIX_OMSG_DONE(i);
743 entries[TSI721_VECT_OMB0_INT + i].entry =
744 TSI721_MSIX_OMSG_INT(i);
745 }
746
747#ifdef CONFIG_RAPIDIO_DMA_ENGINE
748 /*
749 * Initialize MSI-X entries for Block DMA Engine:
750 * this driver supports XXX DMA channels
751 * (one is reserved for SRIO maintenance transactions)
752 */
753 for (i = 0; i < TSI721_DMA_CHNUM; i++) {
754 entries[TSI721_VECT_DMA0_DONE + i].entry =
755 TSI721_MSIX_DMACH_DONE(i);
756 entries[TSI721_VECT_DMA0_INT + i].entry =
757 TSI721_MSIX_DMACH_INT(i);
758 }
759#endif /* CONFIG_RAPIDIO_DMA_ENGINE */
760
761 err = pci_enable_msix_exact(priv->pdev, entries, ARRAY_SIZE(entries));
762 if (err) {
763 tsi_err(&priv->pdev->dev,
764 "Failed to enable MSI-X (err=%d)", err);
765 return err;
766 }
767
768 /*
769 * Copy MSI-X vector information into tsi721 private structure
770 */
771 priv->msix[TSI721_VECT_IDB].vector = entries[TSI721_VECT_IDB].vector;
772 snprintf(priv->msix[TSI721_VECT_IDB].irq_name, IRQ_DEVICE_NAME_MAX,
773 DRV_NAME "-idb@pci:%s", pci_name(priv->pdev));
774 priv->msix[TSI721_VECT_PWRX].vector = entries[TSI721_VECT_PWRX].vector;
775 snprintf(priv->msix[TSI721_VECT_PWRX].irq_name, IRQ_DEVICE_NAME_MAX,
776 DRV_NAME "-pwrx@pci:%s", pci_name(priv->pdev));
777
778 for (i = 0; i < RIO_MAX_MBOX; i++) {
779 priv->msix[TSI721_VECT_IMB0_RCV + i].vector =
780 entries[TSI721_VECT_IMB0_RCV + i].vector;
781 snprintf(priv->msix[TSI721_VECT_IMB0_RCV + i].irq_name,
782 IRQ_DEVICE_NAME_MAX, DRV_NAME "-imbr%d@pci:%s",
783 i, pci_name(priv->pdev));
784
785 priv->msix[TSI721_VECT_IMB0_INT + i].vector =
786 entries[TSI721_VECT_IMB0_INT + i].vector;
787 snprintf(priv->msix[TSI721_VECT_IMB0_INT + i].irq_name,
788 IRQ_DEVICE_NAME_MAX, DRV_NAME "-imbi%d@pci:%s",
789 i, pci_name(priv->pdev));
790
791 priv->msix[TSI721_VECT_OMB0_DONE + i].vector =
792 entries[TSI721_VECT_OMB0_DONE + i].vector;
793 snprintf(priv->msix[TSI721_VECT_OMB0_DONE + i].irq_name,
794 IRQ_DEVICE_NAME_MAX, DRV_NAME "-ombd%d@pci:%s",
795 i, pci_name(priv->pdev));
796
797 priv->msix[TSI721_VECT_OMB0_INT + i].vector =
798 entries[TSI721_VECT_OMB0_INT + i].vector;
799 snprintf(priv->msix[TSI721_VECT_OMB0_INT + i].irq_name,
800 IRQ_DEVICE_NAME_MAX, DRV_NAME "-ombi%d@pci:%s",
801 i, pci_name(priv->pdev));
802 }
803
804#ifdef CONFIG_RAPIDIO_DMA_ENGINE
805 for (i = 0; i < TSI721_DMA_CHNUM; i++) {
806 priv->msix[TSI721_VECT_DMA0_DONE + i].vector =
807 entries[TSI721_VECT_DMA0_DONE + i].vector;
808 snprintf(priv->msix[TSI721_VECT_DMA0_DONE + i].irq_name,
809 IRQ_DEVICE_NAME_MAX, DRV_NAME "-dmad%d@pci:%s",
810 i, pci_name(priv->pdev));
811
812 priv->msix[TSI721_VECT_DMA0_INT + i].vector =
813 entries[TSI721_VECT_DMA0_INT + i].vector;
814 snprintf(priv->msix[TSI721_VECT_DMA0_INT + i].irq_name,
815 IRQ_DEVICE_NAME_MAX, DRV_NAME "-dmai%d@pci:%s",
816 i, pci_name(priv->pdev));
817 }
818#endif /* CONFIG_RAPIDIO_DMA_ENGINE */
819
820 return 0;
821}
822#endif /* CONFIG_PCI_MSI */
823
824static int tsi721_request_irq(struct tsi721_device *priv)
825{
826 int err;
827
828#ifdef CONFIG_PCI_MSI
829 if (priv->flags & TSI721_USING_MSIX)
830 err = tsi721_request_msix(priv);
831 else
832#endif
833 err = request_irq(priv->pdev->irq, tsi721_irqhandler,
834 (priv->flags & TSI721_USING_MSI) ? 0 : IRQF_SHARED,
835 DRV_NAME, (void *)priv);
836
837 if (err)
838 tsi_err(&priv->pdev->dev,
839 "Unable to allocate interrupt, err=%d", err);
840
841 return err;
842}
843
844static void tsi721_free_irq(struct tsi721_device *priv)
845{
846#ifdef CONFIG_PCI_MSI
847 if (priv->flags & TSI721_USING_MSIX) {
848 free_irq(priv->msix[TSI721_VECT_IDB].vector, (void *)priv);
849 free_irq(priv->msix[TSI721_VECT_PWRX].vector, (void *)priv);
850 } else
851#endif
852 free_irq(priv->pdev->irq, (void *)priv);
853}
854
855static int
856tsi721_obw_alloc(struct tsi721_device *priv, struct tsi721_obw_bar *pbar,
857 u32 size, int *win_id)
858{
859 u64 win_base;
860 u64 bar_base;
861 u64 bar_end;
862 u32 align;
863 struct tsi721_ob_win *win;
864 struct tsi721_ob_win *new_win = NULL;
865 int new_win_idx = -1;
866 int i = 0;
867
868 bar_base = pbar->base;
869 bar_end = bar_base + pbar->size;
870 win_base = bar_base;
871 align = size/TSI721_PC2SR_ZONES;
872
873 while (i < TSI721_IBWIN_NUM) {
874 for (i = 0; i < TSI721_IBWIN_NUM; i++) {
875 if (!priv->ob_win[i].active) {
876 if (new_win == NULL) {
877 new_win = &priv->ob_win[i];
878 new_win_idx = i;
879 }
880 continue;
881 }
882
883 /*
884 * If this window belongs to the current BAR check it
885 * for overlap
886 */
887 win = &priv->ob_win[i];
888
889 if (win->base >= bar_base && win->base < bar_end) {
890 if (win_base < (win->base + win->size) &&
891 (win_base + size) > win->base) {
892 /* Overlap detected */
893 win_base = win->base + win->size;
894 win_base = ALIGN(win_base, align);
895 break;
896 }
897 }
898 }
899 }
900
901 if (win_base + size > bar_end)
902 return -ENOMEM;
903
904 if (!new_win) {
905 tsi_err(&priv->pdev->dev, "OBW count tracking failed");
906 return -EIO;
907 }
908
909 new_win->active = true;
910 new_win->base = win_base;
911 new_win->size = size;
912 new_win->pbar = pbar;
913 priv->obwin_cnt--;
914 pbar->free -= size;
915 *win_id = new_win_idx;
916 return 0;
917}
918
919static int tsi721_map_outb_win(struct rio_mport *mport, u16 destid, u64 rstart,
920 u32 size, u32 flags, dma_addr_t *laddr)
921{
922 struct tsi721_device *priv = mport->priv;
923 int i;
924 struct tsi721_obw_bar *pbar;
925 struct tsi721_ob_win *ob_win;
926 int obw = -1;
927 u32 rval;
928 u64 rio_addr;
929 u32 zsize;
930 int ret = -ENOMEM;
931
932 tsi_debug(OBW, &priv->pdev->dev,
933 "did=%d ra=0x%llx sz=0x%x", destid, rstart, size);
934
935 if (!is_power_of_2(size) || (size < 0x8000) || (rstart & (size - 1)))
936 return -EINVAL;
937
938 if (priv->obwin_cnt == 0)
939 return -EBUSY;
940
941 for (i = 0; i < 2; i++) {
942 if (priv->p2r_bar[i].free >= size) {
943 pbar = &priv->p2r_bar[i];
944 ret = tsi721_obw_alloc(priv, pbar, size, &obw);
945 if (!ret)
946 break;
947 }
948 }
949
950 if (ret)
951 return ret;
952
953 WARN_ON(obw == -1);
954 ob_win = &priv->ob_win[obw];
955 ob_win->destid = destid;
956 ob_win->rstart = rstart;
957 tsi_debug(OBW, &priv->pdev->dev,
958 "allocated OBW%d @%llx", obw, ob_win->base);
959
960 /*
961 * Configure Outbound Window
962 */
963
964 zsize = size/TSI721_PC2SR_ZONES;
965 rio_addr = rstart;
966
967 /*
968 * Program Address Translation Zones:
969 * This implementation uses all 8 zones associated wit window.
970 */
971 for (i = 0; i < TSI721_PC2SR_ZONES; i++) {
972
973 while (ioread32(priv->regs + TSI721_ZONE_SEL) &
974 TSI721_ZONE_SEL_GO) {
975 udelay(1);
976 }
977
978 rval = (u32)(rio_addr & TSI721_LUT_DATA0_ADD) |
979 TSI721_LUT_DATA0_NREAD | TSI721_LUT_DATA0_NWR;
980 iowrite32(rval, priv->regs + TSI721_LUT_DATA0);
981 rval = (u32)(rio_addr >> 32);
982 iowrite32(rval, priv->regs + TSI721_LUT_DATA1);
983 rval = destid;
984 iowrite32(rval, priv->regs + TSI721_LUT_DATA2);
985
986 rval = TSI721_ZONE_SEL_GO | (obw << 3) | i;
987 iowrite32(rval, priv->regs + TSI721_ZONE_SEL);
988
989 rio_addr += zsize;
990 }
991
992 iowrite32(TSI721_OBWIN_SIZE(size) << 8,
993 priv->regs + TSI721_OBWINSZ(obw));
994 iowrite32((u32)(ob_win->base >> 32), priv->regs + TSI721_OBWINUB(obw));
995 iowrite32((u32)(ob_win->base & TSI721_OBWINLB_BA) | TSI721_OBWINLB_WEN,
996 priv->regs + TSI721_OBWINLB(obw));
997
998 *laddr = ob_win->base;
999 return 0;
1000}
1001
1002static void tsi721_unmap_outb_win(struct rio_mport *mport,
1003 u16 destid, u64 rstart)
1004{
1005 struct tsi721_device *priv = mport->priv;
1006 struct tsi721_ob_win *ob_win;
1007 int i;
1008
1009 tsi_debug(OBW, &priv->pdev->dev, "did=%d ra=0x%llx", destid, rstart);
1010
1011 for (i = 0; i < TSI721_OBWIN_NUM; i++) {
1012 ob_win = &priv->ob_win[i];
1013
1014 if (ob_win->active &&
1015 ob_win->destid == destid && ob_win->rstart == rstart) {
1016 tsi_debug(OBW, &priv->pdev->dev,
1017 "free OBW%d @%llx", i, ob_win->base);
1018 ob_win->active = false;
1019 iowrite32(0, priv->regs + TSI721_OBWINLB(i));
1020 ob_win->pbar->free += ob_win->size;
1021 priv->obwin_cnt++;
1022 break;
1023 }
1024 }
1025}
1026
1027/**
1028 * tsi721_init_pc2sr_mapping - initializes outbound (PCIe->SRIO)
1029 * translation regions.
1030 * @priv: pointer to tsi721 private data
1031 *
1032 * Disables SREP translation regions.
1033 */
1034static void tsi721_init_pc2sr_mapping(struct tsi721_device *priv)
1035{
1036 int i, z;
1037 u32 rval;
1038
1039 /* Disable all PC2SR translation windows */
1040 for (i = 0; i < TSI721_OBWIN_NUM; i++)
1041 iowrite32(0, priv->regs + TSI721_OBWINLB(i));
1042
1043 /* Initialize zone lookup tables to avoid ECC errors on reads */
1044 iowrite32(0, priv->regs + TSI721_LUT_DATA0);
1045 iowrite32(0, priv->regs + TSI721_LUT_DATA1);
1046 iowrite32(0, priv->regs + TSI721_LUT_DATA2);
1047
1048 for (i = 0; i < TSI721_OBWIN_NUM; i++) {
1049 for (z = 0; z < TSI721_PC2SR_ZONES; z++) {
1050 while (ioread32(priv->regs + TSI721_ZONE_SEL) &
1051 TSI721_ZONE_SEL_GO) {
1052 udelay(1);
1053 }
1054 rval = TSI721_ZONE_SEL_GO | (i << 3) | z;
1055 iowrite32(rval, priv->regs + TSI721_ZONE_SEL);
1056 }
1057 }
1058
1059 if (priv->p2r_bar[0].size == 0 && priv->p2r_bar[1].size == 0) {
1060 priv->obwin_cnt = 0;
1061 return;
1062 }
1063
1064 priv->p2r_bar[0].free = priv->p2r_bar[0].size;
1065 priv->p2r_bar[1].free = priv->p2r_bar[1].size;
1066
1067 for (i = 0; i < TSI721_OBWIN_NUM; i++)
1068 priv->ob_win[i].active = false;
1069
1070 priv->obwin_cnt = TSI721_OBWIN_NUM;
1071}
1072
1073/**
1074 * tsi721_rio_map_inb_mem -- Mapping inbound memory region.
1075 * @mport: RapidIO master port
1076 * @lstart: Local memory space start address.
1077 * @rstart: RapidIO space start address.
1078 * @size: The mapping region size.
1079 * @flags: Flags for mapping. 0 for using default flags.
1080 *
1081 * Return: 0 -- Success.
1082 *
1083 * This function will create the inbound mapping
1084 * from rstart to lstart.
1085 */
1086static int tsi721_rio_map_inb_mem(struct rio_mport *mport, dma_addr_t lstart,
1087 u64 rstart, u64 size, u32 flags)
1088{
1089 struct tsi721_device *priv = mport->priv;
1090 int i, avail = -1;
1091 u32 regval;
1092 struct tsi721_ib_win *ib_win;
1093 bool direct = (lstart == rstart);
1094 u64 ibw_size;
1095 dma_addr_t loc_start;
1096 u64 ibw_start;
1097 struct tsi721_ib_win_mapping *map = NULL;
1098 int ret = -EBUSY;
1099
1100 /* Max IBW size supported by HW is 16GB */
1101 if (size > 0x400000000UL)
1102 return -EINVAL;
1103
1104 if (direct) {
1105 /* Calculate minimal acceptable window size and base address */
1106
1107 ibw_size = roundup_pow_of_two(size);
1108 ibw_start = lstart & ~(ibw_size - 1);
1109
1110 tsi_debug(IBW, &priv->pdev->dev,
1111 "Direct (RIO_0x%llx -> PCIe_%pad), size=0x%llx, ibw_start = 0x%llx",
1112 rstart, &lstart, size, ibw_start);
1113
1114 while ((lstart + size) > (ibw_start + ibw_size)) {
1115 ibw_size *= 2;
1116 ibw_start = lstart & ~(ibw_size - 1);
1117 /* Check for crossing IBW max size 16GB */
1118 if (ibw_size > 0x400000000UL)
1119 return -EBUSY;
1120 }
1121
1122 loc_start = ibw_start;
1123
1124 map = kzalloc(sizeof(struct tsi721_ib_win_mapping), GFP_ATOMIC);
1125 if (map == NULL)
1126 return -ENOMEM;
1127
1128 } else {
1129 tsi_debug(IBW, &priv->pdev->dev,
1130 "Translated (RIO_0x%llx -> PCIe_%pad), size=0x%llx",
1131 rstart, &lstart, size);
1132
1133 if (!is_power_of_2(size) || size < 0x1000 ||
1134 ((u64)lstart & (size - 1)) || (rstart & (size - 1)))
1135 return -EINVAL;
1136 if (priv->ibwin_cnt == 0)
1137 return -EBUSY;
1138 ibw_start = rstart;
1139 ibw_size = size;
1140 loc_start = lstart;
1141 }
1142
1143 /*
1144 * Scan for overlapping with active regions and mark the first available
1145 * IB window at the same time.
1146 */
1147 for (i = 0; i < TSI721_IBWIN_NUM; i++) {
1148 ib_win = &priv->ib_win[i];
1149
1150 if (!ib_win->active) {
1151 if (avail == -1) {
1152 avail = i;
1153 ret = 0;
1154 }
1155 } else if (ibw_start < (ib_win->rstart + ib_win->size) &&
1156 (ibw_start + ibw_size) > ib_win->rstart) {
1157 /* Return error if address translation involved */
1158 if (!direct || ib_win->xlat) {
1159 ret = -EFAULT;
1160 break;
1161 }
1162
1163 /*
1164 * Direct mappings usually are larger than originally
1165 * requested fragments - check if this new request fits
1166 * into it.
1167 */
1168 if (rstart >= ib_win->rstart &&
1169 (rstart + size) <= (ib_win->rstart +
1170 ib_win->size)) {
1171 /* We are in - no further mapping required */
1172 map->lstart = lstart;
1173 list_add_tail(&map->node, &ib_win->mappings);
1174 return 0;
1175 }
1176
1177 ret = -EFAULT;
1178 break;
1179 }
1180 }
1181
1182 if (ret)
1183 goto out;
1184 i = avail;
1185
1186 /* Sanity check: available IB window must be disabled at this point */
1187 regval = ioread32(priv->regs + TSI721_IBWIN_LB(i));
1188 if (WARN_ON(regval & TSI721_IBWIN_LB_WEN)) {
1189 ret = -EIO;
1190 goto out;
1191 }
1192
1193 ib_win = &priv->ib_win[i];
1194 ib_win->active = true;
1195 ib_win->rstart = ibw_start;
1196 ib_win->lstart = loc_start;
1197 ib_win->size = ibw_size;
1198 ib_win->xlat = (lstart != rstart);
1199 INIT_LIST_HEAD(&ib_win->mappings);
1200
1201 /*
1202 * When using direct IBW mapping and have larger than requested IBW size
1203 * we can have multiple local memory blocks mapped through the same IBW
1204 * To handle this situation we maintain list of "clients" for such IBWs.
1205 */
1206 if (direct) {
1207 map->lstart = lstart;
1208 list_add_tail(&map->node, &ib_win->mappings);
1209 }
1210
1211 iowrite32(TSI721_IBWIN_SIZE(ibw_size) << 8,
1212 priv->regs + TSI721_IBWIN_SZ(i));
1213
1214 iowrite32(((u64)loc_start >> 32), priv->regs + TSI721_IBWIN_TUA(i));
1215 iowrite32(((u64)loc_start & TSI721_IBWIN_TLA_ADD),
1216 priv->regs + TSI721_IBWIN_TLA(i));
1217
1218 iowrite32(ibw_start >> 32, priv->regs + TSI721_IBWIN_UB(i));
1219 iowrite32((ibw_start & TSI721_IBWIN_LB_BA) | TSI721_IBWIN_LB_WEN,
1220 priv->regs + TSI721_IBWIN_LB(i));
1221
1222 priv->ibwin_cnt--;
1223
1224 tsi_debug(IBW, &priv->pdev->dev,
1225 "Configured IBWIN%d (RIO_0x%llx -> PCIe_%pad), size=0x%llx",
1226 i, ibw_start, &loc_start, ibw_size);
1227
1228 return 0;
1229out:
1230 kfree(map);
1231 return ret;
1232}
1233
1234/**
1235 * tsi721_rio_unmap_inb_mem -- Unmapping inbound memory region.
1236 * @mport: RapidIO master port
1237 * @lstart: Local memory space start address.
1238 */
1239static void tsi721_rio_unmap_inb_mem(struct rio_mport *mport,
1240 dma_addr_t lstart)
1241{
1242 struct tsi721_device *priv = mport->priv;
1243 struct tsi721_ib_win *ib_win;
1244 int i;
1245
1246 tsi_debug(IBW, &priv->pdev->dev,
1247 "Unmap IBW mapped to PCIe_%pad", &lstart);
1248
1249 /* Search for matching active inbound translation window */
1250 for (i = 0; i < TSI721_IBWIN_NUM; i++) {
1251 ib_win = &priv->ib_win[i];
1252
1253 /* Address translating IBWs must to be an exact march */
1254 if (!ib_win->active ||
1255 (ib_win->xlat && lstart != ib_win->lstart))
1256 continue;
1257
1258 if (lstart >= ib_win->lstart &&
1259 lstart < (ib_win->lstart + ib_win->size)) {
1260
1261 if (!ib_win->xlat) {
1262 struct tsi721_ib_win_mapping *map;
1263 int found = 0;
1264
1265 list_for_each_entry(map,
1266 &ib_win->mappings, node) {
1267 if (map->lstart == lstart) {
1268 list_del(&map->node);
1269 kfree(map);
1270 found = 1;
1271 break;
1272 }
1273 }
1274
1275 if (!found)
1276 continue;
1277
1278 if (!list_empty(&ib_win->mappings))
1279 break;
1280 }
1281
1282 tsi_debug(IBW, &priv->pdev->dev, "Disable IBWIN_%d", i);
1283 iowrite32(0, priv->regs + TSI721_IBWIN_LB(i));
1284 ib_win->active = false;
1285 priv->ibwin_cnt++;
1286 break;
1287 }
1288 }
1289
1290 if (i == TSI721_IBWIN_NUM)
1291 tsi_debug(IBW, &priv->pdev->dev,
1292 "IB window mapped to %pad not found", &lstart);
1293}
1294
1295/**
1296 * tsi721_init_sr2pc_mapping - initializes inbound (SRIO->PCIe)
1297 * translation regions.
1298 * @priv: pointer to tsi721 private data
1299 *
1300 * Disables inbound windows.
1301 */
1302static void tsi721_init_sr2pc_mapping(struct tsi721_device *priv)
1303{
1304 int i;
1305
1306 /* Disable all SR2PC inbound windows */
1307 for (i = 0; i < TSI721_IBWIN_NUM; i++)
1308 iowrite32(0, priv->regs + TSI721_IBWIN_LB(i));
1309 priv->ibwin_cnt = TSI721_IBWIN_NUM;
1310}
1311
1312/*
1313 * tsi721_close_sr2pc_mapping - closes all active inbound (SRIO->PCIe)
1314 * translation regions.
1315 * @priv: pointer to tsi721 device private data
1316 */
1317static void tsi721_close_sr2pc_mapping(struct tsi721_device *priv)
1318{
1319 struct tsi721_ib_win *ib_win;
1320 int i;
1321
1322 /* Disable all active SR2PC inbound windows */
1323 for (i = 0; i < TSI721_IBWIN_NUM; i++) {
1324 ib_win = &priv->ib_win[i];
1325 if (ib_win->active) {
1326 iowrite32(0, priv->regs + TSI721_IBWIN_LB(i));
1327 ib_win->active = false;
1328 }
1329 }
1330}
1331
1332/**
1333 * tsi721_port_write_init - Inbound port write interface init
1334 * @priv: pointer to tsi721 private data
1335 *
1336 * Initializes inbound port write handler.
1337 * Returns %0 on success or %-ENOMEM on failure.
1338 */
1339static int tsi721_port_write_init(struct tsi721_device *priv)
1340{
1341 priv->pw_discard_count = 0;
1342 INIT_WORK(&priv->pw_work, tsi721_pw_dpc);
1343 spin_lock_init(&priv->pw_fifo_lock);
1344 if (kfifo_alloc(&priv->pw_fifo,
1345 TSI721_RIO_PW_MSG_SIZE * 32, GFP_KERNEL)) {
1346 tsi_err(&priv->pdev->dev, "PW FIFO allocation failed");
1347 return -ENOMEM;
1348 }
1349
1350 /* Use reliable port-write capture mode */
1351 iowrite32(TSI721_RIO_PW_CTL_PWC_REL, priv->regs + TSI721_RIO_PW_CTL);
1352 return 0;
1353}
1354
1355static void tsi721_port_write_free(struct tsi721_device *priv)
1356{
1357 kfifo_free(&priv->pw_fifo);
1358}
1359
1360static int tsi721_doorbell_init(struct tsi721_device *priv)
1361{
1362 /* Outbound Doorbells do not require any setup.
1363 * Tsi721 uses dedicated PCI BAR1 to generate doorbells.
1364 * That BAR1 was mapped during the probe routine.
1365 */
1366
1367 /* Initialize Inbound Doorbell processing DPC and queue */
1368 priv->db_discard_count = 0;
1369 INIT_WORK(&priv->idb_work, tsi721_db_dpc);
1370
1371 /* Allocate buffer for inbound doorbells queue */
1372 priv->idb_base = dma_alloc_coherent(&priv->pdev->dev,
1373 IDB_QSIZE * TSI721_IDB_ENTRY_SIZE,
1374 &priv->idb_dma, GFP_KERNEL);
1375 if (!priv->idb_base)
1376 return -ENOMEM;
1377
1378 tsi_debug(DBELL, &priv->pdev->dev,
1379 "Allocated IDB buffer @ %p (phys = %pad)",
1380 priv->idb_base, &priv->idb_dma);
1381
1382 iowrite32(TSI721_IDQ_SIZE_VAL(IDB_QSIZE),
1383 priv->regs + TSI721_IDQ_SIZE(IDB_QUEUE));
1384 iowrite32(((u64)priv->idb_dma >> 32),
1385 priv->regs + TSI721_IDQ_BASEU(IDB_QUEUE));
1386 iowrite32(((u64)priv->idb_dma & TSI721_IDQ_BASEL_ADDR),
1387 priv->regs + TSI721_IDQ_BASEL(IDB_QUEUE));
1388 /* Enable accepting all inbound doorbells */
1389 iowrite32(0, priv->regs + TSI721_IDQ_MASK(IDB_QUEUE));
1390
1391 iowrite32(TSI721_IDQ_INIT, priv->regs + TSI721_IDQ_CTL(IDB_QUEUE));
1392
1393 iowrite32(0, priv->regs + TSI721_IDQ_RP(IDB_QUEUE));
1394
1395 return 0;
1396}
1397
1398static void tsi721_doorbell_free(struct tsi721_device *priv)
1399{
1400 if (priv->idb_base == NULL)
1401 return;
1402
1403 /* Free buffer allocated for inbound doorbell queue */
1404 dma_free_coherent(&priv->pdev->dev, IDB_QSIZE * TSI721_IDB_ENTRY_SIZE,
1405 priv->idb_base, priv->idb_dma);
1406 priv->idb_base = NULL;
1407}
1408
1409/**
1410 * tsi721_bdma_maint_init - Initialize maintenance request BDMA channel.
1411 * @priv: pointer to tsi721 private data
1412 *
1413 * Initialize BDMA channel allocated for RapidIO maintenance read/write
1414 * request generation
1415 * Returns %0 on success or %-ENOMEM on failure.
1416 */
1417static int tsi721_bdma_maint_init(struct tsi721_device *priv)
1418{
1419 struct tsi721_dma_desc *bd_ptr;
1420 u64 *sts_ptr;
1421 dma_addr_t bd_phys, sts_phys;
1422 int sts_size;
1423 int bd_num = 2;
1424 void __iomem *regs;
1425
1426 tsi_debug(MAINT, &priv->pdev->dev,
1427 "Init BDMA_%d Maintenance requests", TSI721_DMACH_MAINT);
1428
1429 /*
1430 * Initialize DMA channel for maintenance requests
1431 */
1432
1433 priv->mdma.ch_id = TSI721_DMACH_MAINT;
1434 regs = priv->regs + TSI721_DMAC_BASE(TSI721_DMACH_MAINT);
1435
1436 /* Allocate space for DMA descriptors */
1437 bd_ptr = dma_alloc_coherent(&priv->pdev->dev,
1438 bd_num * sizeof(struct tsi721_dma_desc),
1439 &bd_phys, GFP_KERNEL);
1440 if (!bd_ptr)
1441 return -ENOMEM;
1442
1443 priv->mdma.bd_num = bd_num;
1444 priv->mdma.bd_phys = bd_phys;
1445 priv->mdma.bd_base = bd_ptr;
1446
1447 tsi_debug(MAINT, &priv->pdev->dev, "DMA descriptors @ %p (phys = %pad)",
1448 bd_ptr, &bd_phys);
1449
1450 /* Allocate space for descriptor status FIFO */
1451 sts_size = (bd_num >= TSI721_DMA_MINSTSSZ) ?
1452 bd_num : TSI721_DMA_MINSTSSZ;
1453 sts_size = roundup_pow_of_two(sts_size);
1454 sts_ptr = dma_alloc_coherent(&priv->pdev->dev,
1455 sts_size * sizeof(struct tsi721_dma_sts),
1456 &sts_phys, GFP_KERNEL);
1457 if (!sts_ptr) {
1458 /* Free space allocated for DMA descriptors */
1459 dma_free_coherent(&priv->pdev->dev,
1460 bd_num * sizeof(struct tsi721_dma_desc),
1461 bd_ptr, bd_phys);
1462 priv->mdma.bd_base = NULL;
1463 return -ENOMEM;
1464 }
1465
1466 priv->mdma.sts_phys = sts_phys;
1467 priv->mdma.sts_base = sts_ptr;
1468 priv->mdma.sts_size = sts_size;
1469
1470 tsi_debug(MAINT, &priv->pdev->dev,
1471 "desc status FIFO @ %p (phys = %pad) size=0x%x",
1472 sts_ptr, &sts_phys, sts_size);
1473
1474 /* Initialize DMA descriptors ring */
1475 bd_ptr[bd_num - 1].type_id = cpu_to_le32(DTYPE3 << 29);
1476 bd_ptr[bd_num - 1].next_lo = cpu_to_le32((u64)bd_phys &
1477 TSI721_DMAC_DPTRL_MASK);
1478 bd_ptr[bd_num - 1].next_hi = cpu_to_le32((u64)bd_phys >> 32);
1479
1480 /* Setup DMA descriptor pointers */
1481 iowrite32(((u64)bd_phys >> 32), regs + TSI721_DMAC_DPTRH);
1482 iowrite32(((u64)bd_phys & TSI721_DMAC_DPTRL_MASK),
1483 regs + TSI721_DMAC_DPTRL);
1484
1485 /* Setup descriptor status FIFO */
1486 iowrite32(((u64)sts_phys >> 32), regs + TSI721_DMAC_DSBH);
1487 iowrite32(((u64)sts_phys & TSI721_DMAC_DSBL_MASK),
1488 regs + TSI721_DMAC_DSBL);
1489 iowrite32(TSI721_DMAC_DSSZ_SIZE(sts_size),
1490 regs + TSI721_DMAC_DSSZ);
1491
1492 /* Clear interrupt bits */
1493 iowrite32(TSI721_DMAC_INT_ALL, regs + TSI721_DMAC_INT);
1494
1495 ioread32(regs + TSI721_DMAC_INT);
1496
1497 /* Toggle DMA channel initialization */
1498 iowrite32(TSI721_DMAC_CTL_INIT, regs + TSI721_DMAC_CTL);
1499 ioread32(regs + TSI721_DMAC_CTL);
1500 udelay(10);
1501
1502 return 0;
1503}
1504
1505static int tsi721_bdma_maint_free(struct tsi721_device *priv)
1506{
1507 u32 ch_stat;
1508 struct tsi721_bdma_maint *mdma = &priv->mdma;
1509 void __iomem *regs = priv->regs + TSI721_DMAC_BASE(mdma->ch_id);
1510
1511 if (mdma->bd_base == NULL)
1512 return 0;
1513
1514 /* Check if DMA channel still running */
1515 ch_stat = ioread32(regs + TSI721_DMAC_STS);
1516 if (ch_stat & TSI721_DMAC_STS_RUN)
1517 return -EFAULT;
1518
1519 /* Put DMA channel into init state */
1520 iowrite32(TSI721_DMAC_CTL_INIT, regs + TSI721_DMAC_CTL);
1521
1522 /* Free space allocated for DMA descriptors */
1523 dma_free_coherent(&priv->pdev->dev,
1524 mdma->bd_num * sizeof(struct tsi721_dma_desc),
1525 mdma->bd_base, mdma->bd_phys);
1526 mdma->bd_base = NULL;
1527
1528 /* Free space allocated for status FIFO */
1529 dma_free_coherent(&priv->pdev->dev,
1530 mdma->sts_size * sizeof(struct tsi721_dma_sts),
1531 mdma->sts_base, mdma->sts_phys);
1532 mdma->sts_base = NULL;
1533 return 0;
1534}
1535
1536/* Enable Inbound Messaging Interrupts */
1537static void
1538tsi721_imsg_interrupt_enable(struct tsi721_device *priv, int ch,
1539 u32 inte_mask)
1540{
1541 u32 rval;
1542
1543 if (!inte_mask)
1544 return;
1545
1546 /* Clear pending Inbound Messaging interrupts */
1547 iowrite32(inte_mask, priv->regs + TSI721_IBDMAC_INT(ch));
1548
1549 /* Enable Inbound Messaging interrupts */
1550 rval = ioread32(priv->regs + TSI721_IBDMAC_INTE(ch));
1551 iowrite32(rval | inte_mask, priv->regs + TSI721_IBDMAC_INTE(ch));
1552
1553 if (priv->flags & TSI721_USING_MSIX)
1554 return; /* Finished if we are in MSI-X mode */
1555
1556 /*
1557 * For MSI and INTA interrupt signalling we need to enable next levels
1558 */
1559
1560 /* Enable Device Channel Interrupt */
1561 rval = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
1562 iowrite32(rval | TSI721_INT_IMSG_CHAN(ch),
1563 priv->regs + TSI721_DEV_CHAN_INTE);
1564}
1565
1566/* Disable Inbound Messaging Interrupts */
1567static void
1568tsi721_imsg_interrupt_disable(struct tsi721_device *priv, int ch,
1569 u32 inte_mask)
1570{
1571 u32 rval;
1572
1573 if (!inte_mask)
1574 return;
1575
1576 /* Clear pending Inbound Messaging interrupts */
1577 iowrite32(inte_mask, priv->regs + TSI721_IBDMAC_INT(ch));
1578
1579 /* Disable Inbound Messaging interrupts */
1580 rval = ioread32(priv->regs + TSI721_IBDMAC_INTE(ch));
1581 rval &= ~inte_mask;
1582 iowrite32(rval, priv->regs + TSI721_IBDMAC_INTE(ch));
1583
1584 if (priv->flags & TSI721_USING_MSIX)
1585 return; /* Finished if we are in MSI-X mode */
1586
1587 /*
1588 * For MSI and INTA interrupt signalling we need to disable next levels
1589 */
1590
1591 /* Disable Device Channel Interrupt */
1592 rval = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
1593 rval &= ~TSI721_INT_IMSG_CHAN(ch);
1594 iowrite32(rval, priv->regs + TSI721_DEV_CHAN_INTE);
1595}
1596
1597/* Enable Outbound Messaging interrupts */
1598static void
1599tsi721_omsg_interrupt_enable(struct tsi721_device *priv, int ch,
1600 u32 inte_mask)
1601{
1602 u32 rval;
1603
1604 if (!inte_mask)
1605 return;
1606
1607 /* Clear pending Outbound Messaging interrupts */
1608 iowrite32(inte_mask, priv->regs + TSI721_OBDMAC_INT(ch));
1609
1610 /* Enable Outbound Messaging channel interrupts */
1611 rval = ioread32(priv->regs + TSI721_OBDMAC_INTE(ch));
1612 iowrite32(rval | inte_mask, priv->regs + TSI721_OBDMAC_INTE(ch));
1613
1614 if (priv->flags & TSI721_USING_MSIX)
1615 return; /* Finished if we are in MSI-X mode */
1616
1617 /*
1618 * For MSI and INTA interrupt signalling we need to enable next levels
1619 */
1620
1621 /* Enable Device Channel Interrupt */
1622 rval = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
1623 iowrite32(rval | TSI721_INT_OMSG_CHAN(ch),
1624 priv->regs + TSI721_DEV_CHAN_INTE);
1625}
1626
1627/* Disable Outbound Messaging interrupts */
1628static void
1629tsi721_omsg_interrupt_disable(struct tsi721_device *priv, int ch,
1630 u32 inte_mask)
1631{
1632 u32 rval;
1633
1634 if (!inte_mask)
1635 return;
1636
1637 /* Clear pending Outbound Messaging interrupts */
1638 iowrite32(inte_mask, priv->regs + TSI721_OBDMAC_INT(ch));
1639
1640 /* Disable Outbound Messaging interrupts */
1641 rval = ioread32(priv->regs + TSI721_OBDMAC_INTE(ch));
1642 rval &= ~inte_mask;
1643 iowrite32(rval, priv->regs + TSI721_OBDMAC_INTE(ch));
1644
1645 if (priv->flags & TSI721_USING_MSIX)
1646 return; /* Finished if we are in MSI-X mode */
1647
1648 /*
1649 * For MSI and INTA interrupt signalling we need to disable next levels
1650 */
1651
1652 /* Disable Device Channel Interrupt */
1653 rval = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
1654 rval &= ~TSI721_INT_OMSG_CHAN(ch);
1655 iowrite32(rval, priv->regs + TSI721_DEV_CHAN_INTE);
1656}
1657
1658/**
1659 * tsi721_add_outb_message - Add message to the Tsi721 outbound message queue
1660 * @mport: Master port with outbound message queue
1661 * @rdev: Target of outbound message
1662 * @mbox: Outbound mailbox
1663 * @buffer: Message to add to outbound queue
1664 * @len: Length of message
1665 */
1666static int
1667tsi721_add_outb_message(struct rio_mport *mport, struct rio_dev *rdev, int mbox,
1668 void *buffer, size_t len)
1669{
1670 struct tsi721_device *priv = mport->priv;
1671 struct tsi721_omsg_desc *desc;
1672 u32 tx_slot;
1673 unsigned long flags;
1674
1675 if (!priv->omsg_init[mbox] ||
1676 len > TSI721_MSG_MAX_SIZE || len < 8)
1677 return -EINVAL;
1678
1679 spin_lock_irqsave(&priv->omsg_ring[mbox].lock, flags);
1680
1681 tx_slot = priv->omsg_ring[mbox].tx_slot;
1682
1683 /* Copy copy message into transfer buffer */
1684 memcpy(priv->omsg_ring[mbox].omq_base[tx_slot], buffer, len);
1685
1686 if (len & 0x7)
1687 len += 8;
1688
1689 /* Build descriptor associated with buffer */
1690 desc = priv->omsg_ring[mbox].omd_base;
1691 desc[tx_slot].type_id = cpu_to_le32((DTYPE4 << 29) | rdev->destid);
1692#ifdef TSI721_OMSG_DESC_INT
1693 /* Request IOF_DONE interrupt generation for each N-th frame in queue */
1694 if (tx_slot % 4 == 0)
1695 desc[tx_slot].type_id |= cpu_to_le32(TSI721_OMD_IOF);
1696#endif
1697 desc[tx_slot].msg_info =
1698 cpu_to_le32((mport->sys_size << 26) | (mbox << 22) |
1699 (0xe << 12) | (len & 0xff8));
1700 desc[tx_slot].bufptr_lo =
1701 cpu_to_le32((u64)priv->omsg_ring[mbox].omq_phys[tx_slot] &
1702 0xffffffff);
1703 desc[tx_slot].bufptr_hi =
1704 cpu_to_le32((u64)priv->omsg_ring[mbox].omq_phys[tx_slot] >> 32);
1705
1706 priv->omsg_ring[mbox].wr_count++;
1707
1708 /* Go to next descriptor */
1709 if (++priv->omsg_ring[mbox].tx_slot == priv->omsg_ring[mbox].size) {
1710 priv->omsg_ring[mbox].tx_slot = 0;
1711 /* Move through the ring link descriptor at the end */
1712 priv->omsg_ring[mbox].wr_count++;
1713 }
1714
1715 mb();
1716
1717 /* Set new write count value */
1718 iowrite32(priv->omsg_ring[mbox].wr_count,
1719 priv->regs + TSI721_OBDMAC_DWRCNT(mbox));
1720 ioread32(priv->regs + TSI721_OBDMAC_DWRCNT(mbox));
1721
1722 spin_unlock_irqrestore(&priv->omsg_ring[mbox].lock, flags);
1723
1724 return 0;
1725}
1726
1727/**
1728 * tsi721_omsg_handler - Outbound Message Interrupt Handler
1729 * @priv: pointer to tsi721 private data
1730 * @ch: number of OB MSG channel to service
1731 *
1732 * Services channel interrupts from outbound messaging engine.
1733 */
1734static void tsi721_omsg_handler(struct tsi721_device *priv, int ch)
1735{
1736 u32 omsg_int;
1737 struct rio_mport *mport = &priv->mport;
1738 void *dev_id = NULL;
1739 u32 tx_slot = 0xffffffff;
1740 int do_callback = 0;
1741
1742 spin_lock(&priv->omsg_ring[ch].lock);
1743
1744 omsg_int = ioread32(priv->regs + TSI721_OBDMAC_INT(ch));
1745
1746 if (omsg_int & TSI721_OBDMAC_INT_ST_FULL)
1747 tsi_info(&priv->pdev->dev,
1748 "OB MBOX%d: Status FIFO is full", ch);
1749
1750 if (omsg_int & (TSI721_OBDMAC_INT_DONE | TSI721_OBDMAC_INT_IOF_DONE)) {
1751 u32 srd_ptr;
1752 u64 *sts_ptr, last_ptr = 0, prev_ptr = 0;
1753 int i, j;
1754
1755 /*
1756 * Find last successfully processed descriptor
1757 */
1758
1759 /* Check and clear descriptor status FIFO entries */
1760 srd_ptr = priv->omsg_ring[ch].sts_rdptr;
1761 sts_ptr = priv->omsg_ring[ch].sts_base;
1762 j = srd_ptr * 8;
1763 while (sts_ptr[j]) {
1764 for (i = 0; i < 8 && sts_ptr[j]; i++, j++) {
1765 prev_ptr = last_ptr;
1766 last_ptr = le64_to_cpu(sts_ptr[j]);
1767 sts_ptr[j] = 0;
1768 }
1769
1770 ++srd_ptr;
1771 srd_ptr %= priv->omsg_ring[ch].sts_size;
1772 j = srd_ptr * 8;
1773 }
1774
1775 if (last_ptr == 0)
1776 goto no_sts_update;
1777
1778 priv->omsg_ring[ch].sts_rdptr = srd_ptr;
1779 iowrite32(srd_ptr, priv->regs + TSI721_OBDMAC_DSRP(ch));
1780
1781 if (!mport->outb_msg[ch].mcback)
1782 goto no_sts_update;
1783
1784 /* Inform upper layer about transfer completion */
1785
1786 tx_slot = (last_ptr - (u64)priv->omsg_ring[ch].omd_phys)/
1787 sizeof(struct tsi721_omsg_desc);
1788
1789 /*
1790 * Check if this is a Link Descriptor (LD).
1791 * If yes, ignore LD and use descriptor processed
1792 * before LD.
1793 */
1794 if (tx_slot == priv->omsg_ring[ch].size) {
1795 if (prev_ptr)
1796 tx_slot = (prev_ptr -
1797 (u64)priv->omsg_ring[ch].omd_phys)/
1798 sizeof(struct tsi721_omsg_desc);
1799 else
1800 goto no_sts_update;
1801 }
1802
1803 if (tx_slot >= priv->omsg_ring[ch].size)
1804 tsi_debug(OMSG, &priv->pdev->dev,
1805 "OB_MSG tx_slot=%x > size=%x",
1806 tx_slot, priv->omsg_ring[ch].size);
1807 WARN_ON(tx_slot >= priv->omsg_ring[ch].size);
1808
1809 /* Move slot index to the next message to be sent */
1810 ++tx_slot;
1811 if (tx_slot == priv->omsg_ring[ch].size)
1812 tx_slot = 0;
1813
1814 dev_id = priv->omsg_ring[ch].dev_id;
1815 do_callback = 1;
1816 }
1817
1818no_sts_update:
1819
1820 if (omsg_int & TSI721_OBDMAC_INT_ERROR) {
1821 /*
1822 * Outbound message operation aborted due to error,
1823 * reinitialize OB MSG channel
1824 */
1825
1826 tsi_debug(OMSG, &priv->pdev->dev, "OB MSG ABORT ch_stat=%x",
1827 ioread32(priv->regs + TSI721_OBDMAC_STS(ch)));
1828
1829 iowrite32(TSI721_OBDMAC_INT_ERROR,
1830 priv->regs + TSI721_OBDMAC_INT(ch));
1831 iowrite32(TSI721_OBDMAC_CTL_RETRY_THR | TSI721_OBDMAC_CTL_INIT,
1832 priv->regs + TSI721_OBDMAC_CTL(ch));
1833 ioread32(priv->regs + TSI721_OBDMAC_CTL(ch));
1834
1835 /* Inform upper level to clear all pending tx slots */
1836 dev_id = priv->omsg_ring[ch].dev_id;
1837 tx_slot = priv->omsg_ring[ch].tx_slot;
1838 do_callback = 1;
1839
1840 /* Synch tx_slot tracking */
1841 iowrite32(priv->omsg_ring[ch].tx_slot,
1842 priv->regs + TSI721_OBDMAC_DRDCNT(ch));
1843 ioread32(priv->regs + TSI721_OBDMAC_DRDCNT(ch));
1844 priv->omsg_ring[ch].wr_count = priv->omsg_ring[ch].tx_slot;
1845 priv->omsg_ring[ch].sts_rdptr = 0;
1846 }
1847
1848 /* Clear channel interrupts */
1849 iowrite32(omsg_int, priv->regs + TSI721_OBDMAC_INT(ch));
1850
1851 if (!(priv->flags & TSI721_USING_MSIX)) {
1852 u32 ch_inte;
1853
1854 /* Re-enable channel interrupts */
1855 ch_inte = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
1856 ch_inte |= TSI721_INT_OMSG_CHAN(ch);
1857 iowrite32(ch_inte, priv->regs + TSI721_DEV_CHAN_INTE);
1858 }
1859
1860 spin_unlock(&priv->omsg_ring[ch].lock);
1861
1862 if (mport->outb_msg[ch].mcback && do_callback)
1863 mport->outb_msg[ch].mcback(mport, dev_id, ch, tx_slot);
1864}
1865
1866/**
1867 * tsi721_open_outb_mbox - Initialize Tsi721 outbound mailbox
1868 * @mport: Master port implementing Outbound Messaging Engine
1869 * @dev_id: Device specific pointer to pass on event
1870 * @mbox: Mailbox to open
1871 * @entries: Number of entries in the outbound mailbox ring
1872 */
1873static int tsi721_open_outb_mbox(struct rio_mport *mport, void *dev_id,
1874 int mbox, int entries)
1875{
1876 struct tsi721_device *priv = mport->priv;
1877 struct tsi721_omsg_desc *bd_ptr;
1878 int i, rc = 0;
1879
1880 if ((entries < TSI721_OMSGD_MIN_RING_SIZE) ||
1881 (entries > (TSI721_OMSGD_RING_SIZE)) ||
1882 (!is_power_of_2(entries)) || mbox >= RIO_MAX_MBOX) {
1883 rc = -EINVAL;
1884 goto out;
1885 }
1886
1887 if ((mbox_sel & (1 << mbox)) == 0) {
1888 rc = -ENODEV;
1889 goto out;
1890 }
1891
1892 priv->omsg_ring[mbox].dev_id = dev_id;
1893 priv->omsg_ring[mbox].size = entries;
1894 priv->omsg_ring[mbox].sts_rdptr = 0;
1895 spin_lock_init(&priv->omsg_ring[mbox].lock);
1896
1897 /* Outbound Msg Buffer allocation based on
1898 the number of maximum descriptor entries */
1899 for (i = 0; i < entries; i++) {
1900 priv->omsg_ring[mbox].omq_base[i] =
1901 dma_alloc_coherent(
1902 &priv->pdev->dev, TSI721_MSG_BUFFER_SIZE,
1903 &priv->omsg_ring[mbox].omq_phys[i],
1904 GFP_KERNEL);
1905 if (priv->omsg_ring[mbox].omq_base[i] == NULL) {
1906 tsi_debug(OMSG, &priv->pdev->dev,
1907 "ENOMEM for OB_MSG_%d data buffer", mbox);
1908 rc = -ENOMEM;
1909 goto out_buf;
1910 }
1911 }
1912
1913 /* Outbound message descriptor allocation */
1914 priv->omsg_ring[mbox].omd_base = dma_alloc_coherent(
1915 &priv->pdev->dev,
1916 (entries + 1) * sizeof(struct tsi721_omsg_desc),
1917 &priv->omsg_ring[mbox].omd_phys, GFP_KERNEL);
1918 if (priv->omsg_ring[mbox].omd_base == NULL) {
1919 tsi_debug(OMSG, &priv->pdev->dev,
1920 "ENOMEM for OB_MSG_%d descriptor memory", mbox);
1921 rc = -ENOMEM;
1922 goto out_buf;
1923 }
1924
1925 priv->omsg_ring[mbox].tx_slot = 0;
1926
1927 /* Outbound message descriptor status FIFO allocation */
1928 priv->omsg_ring[mbox].sts_size = roundup_pow_of_two(entries + 1);
1929 priv->omsg_ring[mbox].sts_base = dma_alloc_coherent(&priv->pdev->dev,
1930 priv->omsg_ring[mbox].sts_size * sizeof(struct tsi721_dma_sts),
1931 &priv->omsg_ring[mbox].sts_phys,
1932 GFP_KERNEL);
1933 if (priv->omsg_ring[mbox].sts_base == NULL) {
1934 tsi_debug(OMSG, &priv->pdev->dev,
1935 "ENOMEM for OB_MSG_%d status FIFO", mbox);
1936 rc = -ENOMEM;
1937 goto out_desc;
1938 }
1939
1940 /*
1941 * Configure Outbound Messaging Engine
1942 */
1943
1944 /* Setup Outbound Message descriptor pointer */
1945 iowrite32(((u64)priv->omsg_ring[mbox].omd_phys >> 32),
1946 priv->regs + TSI721_OBDMAC_DPTRH(mbox));
1947 iowrite32(((u64)priv->omsg_ring[mbox].omd_phys &
1948 TSI721_OBDMAC_DPTRL_MASK),
1949 priv->regs + TSI721_OBDMAC_DPTRL(mbox));
1950
1951 /* Setup Outbound Message descriptor status FIFO */
1952 iowrite32(((u64)priv->omsg_ring[mbox].sts_phys >> 32),
1953 priv->regs + TSI721_OBDMAC_DSBH(mbox));
1954 iowrite32(((u64)priv->omsg_ring[mbox].sts_phys &
1955 TSI721_OBDMAC_DSBL_MASK),
1956 priv->regs + TSI721_OBDMAC_DSBL(mbox));
1957 iowrite32(TSI721_DMAC_DSSZ_SIZE(priv->omsg_ring[mbox].sts_size),
1958 priv->regs + (u32)TSI721_OBDMAC_DSSZ(mbox));
1959
1960 /* Enable interrupts */
1961
1962#ifdef CONFIG_PCI_MSI
1963 if (priv->flags & TSI721_USING_MSIX) {
1964 int idx = TSI721_VECT_OMB0_DONE + mbox;
1965
1966 /* Request interrupt service if we are in MSI-X mode */
1967 rc = request_irq(priv->msix[idx].vector, tsi721_omsg_msix, 0,
1968 priv->msix[idx].irq_name, (void *)priv);
1969
1970 if (rc) {
1971 tsi_debug(OMSG, &priv->pdev->dev,
1972 "Unable to get MSI-X IRQ for OBOX%d-DONE",
1973 mbox);
1974 goto out_stat;
1975 }
1976
1977 idx = TSI721_VECT_OMB0_INT + mbox;
1978 rc = request_irq(priv->msix[idx].vector, tsi721_omsg_msix, 0,
1979 priv->msix[idx].irq_name, (void *)priv);
1980
1981 if (rc) {
1982 tsi_debug(OMSG, &priv->pdev->dev,
1983 "Unable to get MSI-X IRQ for MBOX%d-INT", mbox);
1984 idx = TSI721_VECT_OMB0_DONE + mbox;
1985 free_irq(priv->msix[idx].vector, (void *)priv);
1986 goto out_stat;
1987 }
1988 }
1989#endif /* CONFIG_PCI_MSI */
1990
1991 tsi721_omsg_interrupt_enable(priv, mbox, TSI721_OBDMAC_INT_ALL);
1992
1993 /* Initialize Outbound Message descriptors ring */
1994 bd_ptr = priv->omsg_ring[mbox].omd_base;
1995 bd_ptr[entries].type_id = cpu_to_le32(DTYPE5 << 29);
1996 bd_ptr[entries].msg_info = 0;
1997 bd_ptr[entries].next_lo =
1998 cpu_to_le32((u64)priv->omsg_ring[mbox].omd_phys &
1999 TSI721_OBDMAC_DPTRL_MASK);
2000 bd_ptr[entries].next_hi =
2001 cpu_to_le32((u64)priv->omsg_ring[mbox].omd_phys >> 32);
2002 priv->omsg_ring[mbox].wr_count = 0;
2003 mb();
2004
2005 /* Initialize Outbound Message engine */
2006 iowrite32(TSI721_OBDMAC_CTL_RETRY_THR | TSI721_OBDMAC_CTL_INIT,
2007 priv->regs + TSI721_OBDMAC_CTL(mbox));
2008 ioread32(priv->regs + TSI721_OBDMAC_DWRCNT(mbox));
2009 udelay(10);
2010
2011 priv->omsg_init[mbox] = 1;
2012
2013 return 0;
2014
2015#ifdef CONFIG_PCI_MSI
2016out_stat:
2017 dma_free_coherent(&priv->pdev->dev,
2018 priv->omsg_ring[mbox].sts_size * sizeof(struct tsi721_dma_sts),
2019 priv->omsg_ring[mbox].sts_base,
2020 priv->omsg_ring[mbox].sts_phys);
2021
2022 priv->omsg_ring[mbox].sts_base = NULL;
2023#endif /* CONFIG_PCI_MSI */
2024
2025out_desc:
2026 dma_free_coherent(&priv->pdev->dev,
2027 (entries + 1) * sizeof(struct tsi721_omsg_desc),
2028 priv->omsg_ring[mbox].omd_base,
2029 priv->omsg_ring[mbox].omd_phys);
2030
2031 priv->omsg_ring[mbox].omd_base = NULL;
2032
2033out_buf:
2034 for (i = 0; i < priv->omsg_ring[mbox].size; i++) {
2035 if (priv->omsg_ring[mbox].omq_base[i]) {
2036 dma_free_coherent(&priv->pdev->dev,
2037 TSI721_MSG_BUFFER_SIZE,
2038 priv->omsg_ring[mbox].omq_base[i],
2039 priv->omsg_ring[mbox].omq_phys[i]);
2040
2041 priv->omsg_ring[mbox].omq_base[i] = NULL;
2042 }
2043 }
2044
2045out:
2046 return rc;
2047}
2048
2049/**
2050 * tsi721_close_outb_mbox - Close Tsi721 outbound mailbox
2051 * @mport: Master port implementing the outbound message unit
2052 * @mbox: Mailbox to close
2053 */
2054static void tsi721_close_outb_mbox(struct rio_mport *mport, int mbox)
2055{
2056 struct tsi721_device *priv = mport->priv;
2057 u32 i;
2058
2059 if (!priv->omsg_init[mbox])
2060 return;
2061 priv->omsg_init[mbox] = 0;
2062
2063 /* Disable Interrupts */
2064
2065 tsi721_omsg_interrupt_disable(priv, mbox, TSI721_OBDMAC_INT_ALL);
2066
2067#ifdef CONFIG_PCI_MSI
2068 if (priv->flags & TSI721_USING_MSIX) {
2069 free_irq(priv->msix[TSI721_VECT_OMB0_DONE + mbox].vector,
2070 (void *)priv);
2071 free_irq(priv->msix[TSI721_VECT_OMB0_INT + mbox].vector,
2072 (void *)priv);
2073 }
2074#endif /* CONFIG_PCI_MSI */
2075
2076 /* Free OMSG Descriptor Status FIFO */
2077 dma_free_coherent(&priv->pdev->dev,
2078 priv->omsg_ring[mbox].sts_size * sizeof(struct tsi721_dma_sts),
2079 priv->omsg_ring[mbox].sts_base,
2080 priv->omsg_ring[mbox].sts_phys);
2081
2082 priv->omsg_ring[mbox].sts_base = NULL;
2083
2084 /* Free OMSG descriptors */
2085 dma_free_coherent(&priv->pdev->dev,
2086 (priv->omsg_ring[mbox].size + 1) *
2087 sizeof(struct tsi721_omsg_desc),
2088 priv->omsg_ring[mbox].omd_base,
2089 priv->omsg_ring[mbox].omd_phys);
2090
2091 priv->omsg_ring[mbox].omd_base = NULL;
2092
2093 /* Free message buffers */
2094 for (i = 0; i < priv->omsg_ring[mbox].size; i++) {
2095 if (priv->omsg_ring[mbox].omq_base[i]) {
2096 dma_free_coherent(&priv->pdev->dev,
2097 TSI721_MSG_BUFFER_SIZE,
2098 priv->omsg_ring[mbox].omq_base[i],
2099 priv->omsg_ring[mbox].omq_phys[i]);
2100
2101 priv->omsg_ring[mbox].omq_base[i] = NULL;
2102 }
2103 }
2104}
2105
2106/**
2107 * tsi721_imsg_handler - Inbound Message Interrupt Handler
2108 * @priv: pointer to tsi721 private data
2109 * @ch: inbound message channel number to service
2110 *
2111 * Services channel interrupts from inbound messaging engine.
2112 */
2113static void tsi721_imsg_handler(struct tsi721_device *priv, int ch)
2114{
2115 u32 mbox = ch - 4;
2116 u32 imsg_int;
2117 struct rio_mport *mport = &priv->mport;
2118
2119 spin_lock(&priv->imsg_ring[mbox].lock);
2120
2121 imsg_int = ioread32(priv->regs + TSI721_IBDMAC_INT(ch));
2122
2123 if (imsg_int & TSI721_IBDMAC_INT_SRTO)
2124 tsi_info(&priv->pdev->dev, "IB MBOX%d SRIO timeout", mbox);
2125
2126 if (imsg_int & TSI721_IBDMAC_INT_PC_ERROR)
2127 tsi_info(&priv->pdev->dev, "IB MBOX%d PCIe error", mbox);
2128
2129 if (imsg_int & TSI721_IBDMAC_INT_FQ_LOW)
2130 tsi_info(&priv->pdev->dev, "IB MBOX%d IB free queue low", mbox);
2131
2132 /* Clear IB channel interrupts */
2133 iowrite32(imsg_int, priv->regs + TSI721_IBDMAC_INT(ch));
2134
2135 /* If an IB Msg is received notify the upper layer */
2136 if (imsg_int & TSI721_IBDMAC_INT_DQ_RCV &&
2137 mport->inb_msg[mbox].mcback)
2138 mport->inb_msg[mbox].mcback(mport,
2139 priv->imsg_ring[mbox].dev_id, mbox, -1);
2140
2141 if (!(priv->flags & TSI721_USING_MSIX)) {
2142 u32 ch_inte;
2143
2144 /* Re-enable channel interrupts */
2145 ch_inte = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
2146 ch_inte |= TSI721_INT_IMSG_CHAN(ch);
2147 iowrite32(ch_inte, priv->regs + TSI721_DEV_CHAN_INTE);
2148 }
2149
2150 spin_unlock(&priv->imsg_ring[mbox].lock);
2151}
2152
2153/**
2154 * tsi721_open_inb_mbox - Initialize Tsi721 inbound mailbox
2155 * @mport: Master port implementing the Inbound Messaging Engine
2156 * @dev_id: Device specific pointer to pass on event
2157 * @mbox: Mailbox to open
2158 * @entries: Number of entries in the inbound mailbox ring
2159 */
2160static int tsi721_open_inb_mbox(struct rio_mport *mport, void *dev_id,
2161 int mbox, int entries)
2162{
2163 struct tsi721_device *priv = mport->priv;
2164 int ch = mbox + 4;
2165 int i;
2166 u64 *free_ptr;
2167 int rc = 0;
2168
2169 if ((entries < TSI721_IMSGD_MIN_RING_SIZE) ||
2170 (entries > TSI721_IMSGD_RING_SIZE) ||
2171 (!is_power_of_2(entries)) || mbox >= RIO_MAX_MBOX) {
2172 rc = -EINVAL;
2173 goto out;
2174 }
2175
2176 if ((mbox_sel & (1 << mbox)) == 0) {
2177 rc = -ENODEV;
2178 goto out;
2179 }
2180
2181 /* Initialize IB Messaging Ring */
2182 priv->imsg_ring[mbox].dev_id = dev_id;
2183 priv->imsg_ring[mbox].size = entries;
2184 priv->imsg_ring[mbox].rx_slot = 0;
2185 priv->imsg_ring[mbox].desc_rdptr = 0;
2186 priv->imsg_ring[mbox].fq_wrptr = 0;
2187 for (i = 0; i < priv->imsg_ring[mbox].size; i++)
2188 priv->imsg_ring[mbox].imq_base[i] = NULL;
2189 spin_lock_init(&priv->imsg_ring[mbox].lock);
2190
2191 /* Allocate buffers for incoming messages */
2192 priv->imsg_ring[mbox].buf_base =
2193 dma_alloc_coherent(&priv->pdev->dev,
2194 entries * TSI721_MSG_BUFFER_SIZE,
2195 &priv->imsg_ring[mbox].buf_phys,
2196 GFP_KERNEL);
2197
2198 if (priv->imsg_ring[mbox].buf_base == NULL) {
2199 tsi_err(&priv->pdev->dev,
2200 "Failed to allocate buffers for IB MBOX%d", mbox);
2201 rc = -ENOMEM;
2202 goto out;
2203 }
2204
2205 /* Allocate memory for circular free list */
2206 priv->imsg_ring[mbox].imfq_base =
2207 dma_alloc_coherent(&priv->pdev->dev,
2208 entries * 8,
2209 &priv->imsg_ring[mbox].imfq_phys,
2210 GFP_KERNEL);
2211
2212 if (priv->imsg_ring[mbox].imfq_base == NULL) {
2213 tsi_err(&priv->pdev->dev,
2214 "Failed to allocate free queue for IB MBOX%d", mbox);
2215 rc = -ENOMEM;
2216 goto out_buf;
2217 }
2218
2219 /* Allocate memory for Inbound message descriptors */
2220 priv->imsg_ring[mbox].imd_base =
2221 dma_alloc_coherent(&priv->pdev->dev,
2222 entries * sizeof(struct tsi721_imsg_desc),
2223 &priv->imsg_ring[mbox].imd_phys, GFP_KERNEL);
2224
2225 if (priv->imsg_ring[mbox].imd_base == NULL) {
2226 tsi_err(&priv->pdev->dev,
2227 "Failed to allocate descriptor memory for IB MBOX%d",
2228 mbox);
2229 rc = -ENOMEM;
2230 goto out_dma;
2231 }
2232
2233 /* Fill free buffer pointer list */
2234 free_ptr = priv->imsg_ring[mbox].imfq_base;
2235 for (i = 0; i < entries; i++)
2236 free_ptr[i] = cpu_to_le64(
2237 (u64)(priv->imsg_ring[mbox].buf_phys) +
2238 i * 0x1000);
2239
2240 mb();
2241
2242 /*
2243 * For mapping of inbound SRIO Messages into appropriate queues we need
2244 * to set Inbound Device ID register in the messaging engine. We do it
2245 * once when first inbound mailbox is requested.
2246 */
2247 if (!(priv->flags & TSI721_IMSGID_SET)) {
2248 iowrite32((u32)priv->mport.host_deviceid,
2249 priv->regs + TSI721_IB_DEVID);
2250 priv->flags |= TSI721_IMSGID_SET;
2251 }
2252
2253 /*
2254 * Configure Inbound Messaging channel (ch = mbox + 4)
2255 */
2256
2257 /* Setup Inbound Message free queue */
2258 iowrite32(((u64)priv->imsg_ring[mbox].imfq_phys >> 32),
2259 priv->regs + TSI721_IBDMAC_FQBH(ch));
2260 iowrite32(((u64)priv->imsg_ring[mbox].imfq_phys &
2261 TSI721_IBDMAC_FQBL_MASK),
2262 priv->regs+TSI721_IBDMAC_FQBL(ch));
2263 iowrite32(TSI721_DMAC_DSSZ_SIZE(entries),
2264 priv->regs + TSI721_IBDMAC_FQSZ(ch));
2265
2266 /* Setup Inbound Message descriptor queue */
2267 iowrite32(((u64)priv->imsg_ring[mbox].imd_phys >> 32),
2268 priv->regs + TSI721_IBDMAC_DQBH(ch));
2269 iowrite32(((u32)priv->imsg_ring[mbox].imd_phys &
2270 (u32)TSI721_IBDMAC_DQBL_MASK),
2271 priv->regs+TSI721_IBDMAC_DQBL(ch));
2272 iowrite32(TSI721_DMAC_DSSZ_SIZE(entries),
2273 priv->regs + TSI721_IBDMAC_DQSZ(ch));
2274
2275 /* Enable interrupts */
2276
2277#ifdef CONFIG_PCI_MSI
2278 if (priv->flags & TSI721_USING_MSIX) {
2279 int idx = TSI721_VECT_IMB0_RCV + mbox;
2280
2281 /* Request interrupt service if we are in MSI-X mode */
2282 rc = request_irq(priv->msix[idx].vector, tsi721_imsg_msix, 0,
2283 priv->msix[idx].irq_name, (void *)priv);
2284
2285 if (rc) {
2286 tsi_debug(IMSG, &priv->pdev->dev,
2287 "Unable to get MSI-X IRQ for IBOX%d-DONE",
2288 mbox);
2289 goto out_desc;
2290 }
2291
2292 idx = TSI721_VECT_IMB0_INT + mbox;
2293 rc = request_irq(priv->msix[idx].vector, tsi721_imsg_msix, 0,
2294 priv->msix[idx].irq_name, (void *)priv);
2295
2296 if (rc) {
2297 tsi_debug(IMSG, &priv->pdev->dev,
2298 "Unable to get MSI-X IRQ for IBOX%d-INT", mbox);
2299 free_irq(
2300 priv->msix[TSI721_VECT_IMB0_RCV + mbox].vector,
2301 (void *)priv);
2302 goto out_desc;
2303 }
2304 }
2305#endif /* CONFIG_PCI_MSI */
2306
2307 tsi721_imsg_interrupt_enable(priv, ch, TSI721_IBDMAC_INT_ALL);
2308
2309 /* Initialize Inbound Message Engine */
2310 iowrite32(TSI721_IBDMAC_CTL_INIT, priv->regs + TSI721_IBDMAC_CTL(ch));
2311 ioread32(priv->regs + TSI721_IBDMAC_CTL(ch));
2312 udelay(10);
2313 priv->imsg_ring[mbox].fq_wrptr = entries - 1;
2314 iowrite32(entries - 1, priv->regs + TSI721_IBDMAC_FQWP(ch));
2315
2316 priv->imsg_init[mbox] = 1;
2317 return 0;
2318
2319#ifdef CONFIG_PCI_MSI
2320out_desc:
2321 dma_free_coherent(&priv->pdev->dev,
2322 priv->imsg_ring[mbox].size * sizeof(struct tsi721_imsg_desc),
2323 priv->imsg_ring[mbox].imd_base,
2324 priv->imsg_ring[mbox].imd_phys);
2325
2326 priv->imsg_ring[mbox].imd_base = NULL;
2327#endif /* CONFIG_PCI_MSI */
2328
2329out_dma:
2330 dma_free_coherent(&priv->pdev->dev,
2331 priv->imsg_ring[mbox].size * 8,
2332 priv->imsg_ring[mbox].imfq_base,
2333 priv->imsg_ring[mbox].imfq_phys);
2334
2335 priv->imsg_ring[mbox].imfq_base = NULL;
2336
2337out_buf:
2338 dma_free_coherent(&priv->pdev->dev,
2339 priv->imsg_ring[mbox].size * TSI721_MSG_BUFFER_SIZE,
2340 priv->imsg_ring[mbox].buf_base,
2341 priv->imsg_ring[mbox].buf_phys);
2342
2343 priv->imsg_ring[mbox].buf_base = NULL;
2344
2345out:
2346 return rc;
2347}
2348
2349/**
2350 * tsi721_close_inb_mbox - Shut down Tsi721 inbound mailbox
2351 * @mport: Master port implementing the Inbound Messaging Engine
2352 * @mbox: Mailbox to close
2353 */
2354static void tsi721_close_inb_mbox(struct rio_mport *mport, int mbox)
2355{
2356 struct tsi721_device *priv = mport->priv;
2357 u32 rx_slot;
2358 int ch = mbox + 4;
2359
2360 if (!priv->imsg_init[mbox]) /* mbox isn't initialized yet */
2361 return;
2362 priv->imsg_init[mbox] = 0;
2363
2364 /* Disable Inbound Messaging Engine */
2365
2366 /* Disable Interrupts */
2367 tsi721_imsg_interrupt_disable(priv, ch, TSI721_OBDMAC_INT_MASK);
2368
2369#ifdef CONFIG_PCI_MSI
2370 if (priv->flags & TSI721_USING_MSIX) {
2371 free_irq(priv->msix[TSI721_VECT_IMB0_RCV + mbox].vector,
2372 (void *)priv);
2373 free_irq(priv->msix[TSI721_VECT_IMB0_INT + mbox].vector,
2374 (void *)priv);
2375 }
2376#endif /* CONFIG_PCI_MSI */
2377
2378 /* Clear Inbound Buffer Queue */
2379 for (rx_slot = 0; rx_slot < priv->imsg_ring[mbox].size; rx_slot++)
2380 priv->imsg_ring[mbox].imq_base[rx_slot] = NULL;
2381
2382 /* Free memory allocated for message buffers */
2383 dma_free_coherent(&priv->pdev->dev,
2384 priv->imsg_ring[mbox].size * TSI721_MSG_BUFFER_SIZE,
2385 priv->imsg_ring[mbox].buf_base,
2386 priv->imsg_ring[mbox].buf_phys);
2387
2388 priv->imsg_ring[mbox].buf_base = NULL;
2389
2390 /* Free memory allocated for free pointr list */
2391 dma_free_coherent(&priv->pdev->dev,
2392 priv->imsg_ring[mbox].size * 8,
2393 priv->imsg_ring[mbox].imfq_base,
2394 priv->imsg_ring[mbox].imfq_phys);
2395
2396 priv->imsg_ring[mbox].imfq_base = NULL;
2397
2398 /* Free memory allocated for RX descriptors */
2399 dma_free_coherent(&priv->pdev->dev,
2400 priv->imsg_ring[mbox].size * sizeof(struct tsi721_imsg_desc),
2401 priv->imsg_ring[mbox].imd_base,
2402 priv->imsg_ring[mbox].imd_phys);
2403
2404 priv->imsg_ring[mbox].imd_base = NULL;
2405}
2406
2407/**
2408 * tsi721_add_inb_buffer - Add buffer to the Tsi721 inbound message queue
2409 * @mport: Master port implementing the Inbound Messaging Engine
2410 * @mbox: Inbound mailbox number
2411 * @buf: Buffer to add to inbound queue
2412 */
2413static int tsi721_add_inb_buffer(struct rio_mport *mport, int mbox, void *buf)
2414{
2415 struct tsi721_device *priv = mport->priv;
2416 u32 rx_slot;
2417 int rc = 0;
2418
2419 rx_slot = priv->imsg_ring[mbox].rx_slot;
2420 if (priv->imsg_ring[mbox].imq_base[rx_slot]) {
2421 tsi_err(&priv->pdev->dev,
2422 "Error adding inbound buffer %d, buffer exists",
2423 rx_slot);
2424 rc = -EINVAL;
2425 goto out;
2426 }
2427
2428 priv->imsg_ring[mbox].imq_base[rx_slot] = buf;
2429
2430 if (++priv->imsg_ring[mbox].rx_slot == priv->imsg_ring[mbox].size)
2431 priv->imsg_ring[mbox].rx_slot = 0;
2432
2433out:
2434 return rc;
2435}
2436
2437/**
2438 * tsi721_get_inb_message - Fetch inbound message from the Tsi721 MSG Queue
2439 * @mport: Master port implementing the Inbound Messaging Engine
2440 * @mbox: Inbound mailbox number
2441 *
2442 * Returns pointer to the message on success or NULL on failure.
2443 */
2444static void *tsi721_get_inb_message(struct rio_mport *mport, int mbox)
2445{
2446 struct tsi721_device *priv = mport->priv;
2447 struct tsi721_imsg_desc *desc;
2448 u32 rx_slot;
2449 void *rx_virt = NULL;
2450 u64 rx_phys;
2451 void *buf = NULL;
2452 u64 *free_ptr;
2453 int ch = mbox + 4;
2454 int msg_size;
2455
2456 if (!priv->imsg_init[mbox])
2457 return NULL;
2458
2459 desc = priv->imsg_ring[mbox].imd_base;
2460 desc += priv->imsg_ring[mbox].desc_rdptr;
2461
2462 if (!(le32_to_cpu(desc->msg_info) & TSI721_IMD_HO))
2463 goto out;
2464
2465 rx_slot = priv->imsg_ring[mbox].rx_slot;
2466 while (priv->imsg_ring[mbox].imq_base[rx_slot] == NULL) {
2467 if (++rx_slot == priv->imsg_ring[mbox].size)
2468 rx_slot = 0;
2469 }
2470
2471 rx_phys = ((u64)le32_to_cpu(desc->bufptr_hi) << 32) |
2472 le32_to_cpu(desc->bufptr_lo);
2473
2474 rx_virt = priv->imsg_ring[mbox].buf_base +
2475 (rx_phys - (u64)priv->imsg_ring[mbox].buf_phys);
2476
2477 buf = priv->imsg_ring[mbox].imq_base[rx_slot];
2478 msg_size = le32_to_cpu(desc->msg_info) & TSI721_IMD_BCOUNT;
2479 if (msg_size == 0)
2480 msg_size = RIO_MAX_MSG_SIZE;
2481
2482 memcpy(buf, rx_virt, msg_size);
2483 priv->imsg_ring[mbox].imq_base[rx_slot] = NULL;
2484
2485 desc->msg_info &= cpu_to_le32(~TSI721_IMD_HO);
2486 if (++priv->imsg_ring[mbox].desc_rdptr == priv->imsg_ring[mbox].size)
2487 priv->imsg_ring[mbox].desc_rdptr = 0;
2488
2489 iowrite32(priv->imsg_ring[mbox].desc_rdptr,
2490 priv->regs + TSI721_IBDMAC_DQRP(ch));
2491
2492 /* Return free buffer into the pointer list */
2493 free_ptr = priv->imsg_ring[mbox].imfq_base;
2494 free_ptr[priv->imsg_ring[mbox].fq_wrptr] = cpu_to_le64(rx_phys);
2495
2496 if (++priv->imsg_ring[mbox].fq_wrptr == priv->imsg_ring[mbox].size)
2497 priv->imsg_ring[mbox].fq_wrptr = 0;
2498
2499 iowrite32(priv->imsg_ring[mbox].fq_wrptr,
2500 priv->regs + TSI721_IBDMAC_FQWP(ch));
2501out:
2502 return buf;
2503}
2504
2505/**
2506 * tsi721_messages_init - Initialization of Messaging Engine
2507 * @priv: pointer to tsi721 private data
2508 *
2509 * Configures Tsi721 messaging engine.
2510 */
2511static int tsi721_messages_init(struct tsi721_device *priv)
2512{
2513 int ch;
2514
2515 iowrite32(0, priv->regs + TSI721_SMSG_ECC_LOG);
2516 iowrite32(0, priv->regs + TSI721_RETRY_GEN_CNT);
2517 iowrite32(0, priv->regs + TSI721_RETRY_RX_CNT);
2518
2519 /* Set SRIO Message Request/Response Timeout */
2520 iowrite32(TSI721_RQRPTO_VAL, priv->regs + TSI721_RQRPTO);
2521
2522 /* Initialize Inbound Messaging Engine Registers */
2523 for (ch = 0; ch < TSI721_IMSG_CHNUM; ch++) {
2524 /* Clear interrupt bits */
2525 iowrite32(TSI721_IBDMAC_INT_MASK,
2526 priv->regs + TSI721_IBDMAC_INT(ch));
2527 /* Clear Status */
2528 iowrite32(0, priv->regs + TSI721_IBDMAC_STS(ch));
2529
2530 iowrite32(TSI721_SMSG_ECC_COR_LOG_MASK,
2531 priv->regs + TSI721_SMSG_ECC_COR_LOG(ch));
2532 iowrite32(TSI721_SMSG_ECC_NCOR_MASK,
2533 priv->regs + TSI721_SMSG_ECC_NCOR(ch));
2534 }
2535
2536 return 0;
2537}
2538
2539/**
2540 * tsi721_query_mport - Fetch inbound message from the Tsi721 MSG Queue
2541 * @mport: Master port implementing the Inbound Messaging Engine
2542 * @mbox: Inbound mailbox number
2543 *
2544 * Returns pointer to the message on success or NULL on failure.
2545 */
2546static int tsi721_query_mport(struct rio_mport *mport,
2547 struct rio_mport_attr *attr)
2548{
2549 struct tsi721_device *priv = mport->priv;
2550 u32 rval;
2551
2552 rval = ioread32(priv->regs + 0x100 + RIO_PORT_N_ERR_STS_CSR(0, 0));
2553 if (rval & RIO_PORT_N_ERR_STS_PORT_OK) {
2554 rval = ioread32(priv->regs + 0x100 + RIO_PORT_N_CTL2_CSR(0, 0));
2555 attr->link_speed = (rval & RIO_PORT_N_CTL2_SEL_BAUD) >> 28;
2556 rval = ioread32(priv->regs + 0x100 + RIO_PORT_N_CTL_CSR(0, 0));
2557 attr->link_width = (rval & RIO_PORT_N_CTL_IPW) >> 27;
2558 } else
2559 attr->link_speed = RIO_LINK_DOWN;
2560
2561#ifdef CONFIG_RAPIDIO_DMA_ENGINE
2562 attr->flags = RIO_MPORT_DMA | RIO_MPORT_DMA_SG;
2563 attr->dma_max_sge = 0;
2564 attr->dma_max_size = TSI721_BDMA_MAX_BCOUNT;
2565 attr->dma_align = 0;
2566#else
2567 attr->flags = 0;
2568#endif
2569 return 0;
2570}
2571
2572/**
2573 * tsi721_disable_ints - disables all device interrupts
2574 * @priv: pointer to tsi721 private data
2575 */
2576static void tsi721_disable_ints(struct tsi721_device *priv)
2577{
2578 int ch;
2579
2580 /* Disable all device level interrupts */
2581 iowrite32(0, priv->regs + TSI721_DEV_INTE);
2582
2583 /* Disable all Device Channel interrupts */
2584 iowrite32(0, priv->regs + TSI721_DEV_CHAN_INTE);
2585
2586 /* Disable all Inbound Msg Channel interrupts */
2587 for (ch = 0; ch < TSI721_IMSG_CHNUM; ch++)
2588 iowrite32(0, priv->regs + TSI721_IBDMAC_INTE(ch));
2589
2590 /* Disable all Outbound Msg Channel interrupts */
2591 for (ch = 0; ch < TSI721_OMSG_CHNUM; ch++)
2592 iowrite32(0, priv->regs + TSI721_OBDMAC_INTE(ch));
2593
2594 /* Disable all general messaging interrupts */
2595 iowrite32(0, priv->regs + TSI721_SMSG_INTE);
2596
2597 /* Disable all BDMA Channel interrupts */
2598 for (ch = 0; ch < TSI721_DMA_MAXCH; ch++)
2599 iowrite32(0,
2600 priv->regs + TSI721_DMAC_BASE(ch) + TSI721_DMAC_INTE);
2601
2602 /* Disable all general BDMA interrupts */
2603 iowrite32(0, priv->regs + TSI721_BDMA_INTE);
2604
2605 /* Disable all SRIO Channel interrupts */
2606 for (ch = 0; ch < TSI721_SRIO_MAXCH; ch++)
2607 iowrite32(0, priv->regs + TSI721_SR_CHINTE(ch));
2608
2609 /* Disable all general SR2PC interrupts */
2610 iowrite32(0, priv->regs + TSI721_SR2PC_GEN_INTE);
2611
2612 /* Disable all PC2SR interrupts */
2613 iowrite32(0, priv->regs + TSI721_PC2SR_INTE);
2614
2615 /* Disable all I2C interrupts */
2616 iowrite32(0, priv->regs + TSI721_I2C_INT_ENABLE);
2617
2618 /* Disable SRIO MAC interrupts */
2619 iowrite32(0, priv->regs + TSI721_RIO_EM_INT_ENABLE);
2620 iowrite32(0, priv->regs + TSI721_RIO_EM_DEV_INT_EN);
2621}
2622
2623static struct rio_ops tsi721_rio_ops = {
2624 .lcread = tsi721_lcread,
2625 .lcwrite = tsi721_lcwrite,
2626 .cread = tsi721_cread_dma,
2627 .cwrite = tsi721_cwrite_dma,
2628 .dsend = tsi721_dsend,
2629 .open_inb_mbox = tsi721_open_inb_mbox,
2630 .close_inb_mbox = tsi721_close_inb_mbox,
2631 .open_outb_mbox = tsi721_open_outb_mbox,
2632 .close_outb_mbox = tsi721_close_outb_mbox,
2633 .add_outb_message = tsi721_add_outb_message,
2634 .add_inb_buffer = tsi721_add_inb_buffer,
2635 .get_inb_message = tsi721_get_inb_message,
2636 .map_inb = tsi721_rio_map_inb_mem,
2637 .unmap_inb = tsi721_rio_unmap_inb_mem,
2638 .pwenable = tsi721_pw_enable,
2639 .query_mport = tsi721_query_mport,
2640 .map_outb = tsi721_map_outb_win,
2641 .unmap_outb = tsi721_unmap_outb_win,
2642};
2643
2644static void tsi721_mport_release(struct device *dev)
2645{
2646 struct rio_mport *mport = to_rio_mport(dev);
2647
2648 tsi_debug(EXIT, dev, "%s id=%d", mport->name, mport->id);
2649}
2650
2651/**
2652 * tsi721_setup_mport - Setup Tsi721 as RapidIO subsystem master port
2653 * @priv: pointer to tsi721 private data
2654 *
2655 * Configures Tsi721 as RapidIO master port.
2656 */
2657static int tsi721_setup_mport(struct tsi721_device *priv)
2658{
2659 struct pci_dev *pdev = priv->pdev;
2660 int err = 0;
2661 struct rio_mport *mport = &priv->mport;
2662
2663 err = rio_mport_initialize(mport);
2664 if (err)
2665 return err;
2666
2667 mport->ops = &tsi721_rio_ops;
2668 mport->index = 0;
2669 mport->sys_size = 0; /* small system */
2670 mport->priv = (void *)priv;
2671 mport->phys_efptr = 0x100;
2672 mport->phys_rmap = 1;
2673 mport->dev.parent = &pdev->dev;
2674 mport->dev.release = tsi721_mport_release;
2675
2676 INIT_LIST_HEAD(&mport->dbells);
2677
2678 rio_init_dbell_res(&mport->riores[RIO_DOORBELL_RESOURCE], 0, 0xffff);
2679 rio_init_mbox_res(&mport->riores[RIO_INB_MBOX_RESOURCE], 0, 3);
2680 rio_init_mbox_res(&mport->riores[RIO_OUTB_MBOX_RESOURCE], 0, 3);
2681 snprintf(mport->name, RIO_MAX_MPORT_NAME, "%s(%s)",
2682 dev_driver_string(&pdev->dev), dev_name(&pdev->dev));
2683
2684 /* Hook up interrupt handler */
2685
2686#ifdef CONFIG_PCI_MSI
2687 if (!tsi721_enable_msix(priv))
2688 priv->flags |= TSI721_USING_MSIX;
2689 else if (!pci_enable_msi(pdev))
2690 priv->flags |= TSI721_USING_MSI;
2691 else
2692 tsi_debug(MPORT, &pdev->dev,
2693 "MSI/MSI-X is not available. Using legacy INTx.");
2694#endif /* CONFIG_PCI_MSI */
2695
2696 err = tsi721_request_irq(priv);
2697
2698 if (err) {
2699 tsi_err(&pdev->dev, "Unable to get PCI IRQ %02X (err=0x%x)",
2700 pdev->irq, err);
2701 return err;
2702 }
2703
2704#ifdef CONFIG_RAPIDIO_DMA_ENGINE
2705 err = tsi721_register_dma(priv);
2706 if (err)
2707 goto err_exit;
2708#endif
2709 /* Enable SRIO link */
2710 iowrite32(ioread32(priv->regs + TSI721_DEVCTL) |
2711 TSI721_DEVCTL_SRBOOT_CMPL,
2712 priv->regs + TSI721_DEVCTL);
2713
2714 if (mport->host_deviceid >= 0)
2715 iowrite32(RIO_PORT_GEN_HOST | RIO_PORT_GEN_MASTER |
2716 RIO_PORT_GEN_DISCOVERED,
2717 priv->regs + (0x100 + RIO_PORT_GEN_CTL_CSR));
2718 else
2719 iowrite32(0, priv->regs + (0x100 + RIO_PORT_GEN_CTL_CSR));
2720
2721 err = rio_register_mport(mport);
2722 if (err) {
2723 tsi721_unregister_dma(priv);
2724 goto err_exit;
2725 }
2726
2727 return 0;
2728
2729err_exit:
2730 tsi721_free_irq(priv);
2731 return err;
2732}
2733
2734static int tsi721_probe(struct pci_dev *pdev,
2735 const struct pci_device_id *id)
2736{
2737 struct tsi721_device *priv;
2738 int err;
2739
2740 priv = kzalloc(sizeof(struct tsi721_device), GFP_KERNEL);
2741 if (!priv) {
2742 err = -ENOMEM;
2743 goto err_exit;
2744 }
2745
2746 err = pci_enable_device(pdev);
2747 if (err) {
2748 tsi_err(&pdev->dev, "Failed to enable PCI device");
2749 goto err_clean;
2750 }
2751
2752 priv->pdev = pdev;
2753
2754#ifdef DEBUG
2755 {
2756 int i;
2757
2758 for (i = 0; i < PCI_STD_NUM_BARS; i++) {
2759 tsi_debug(INIT, &pdev->dev, "res%d %pR",
2760 i, &pdev->resource[i]);
2761 }
2762 }
2763#endif
2764 /*
2765 * Verify BAR configuration
2766 */
2767
2768 /* BAR_0 (registers) must be 512KB+ in 32-bit address space */
2769 if (!(pci_resource_flags(pdev, BAR_0) & IORESOURCE_MEM) ||
2770 pci_resource_flags(pdev, BAR_0) & IORESOURCE_MEM_64 ||
2771 pci_resource_len(pdev, BAR_0) < TSI721_REG_SPACE_SIZE) {
2772 tsi_err(&pdev->dev, "Missing or misconfigured CSR BAR0");
2773 err = -ENODEV;
2774 goto err_disable_pdev;
2775 }
2776
2777 /* BAR_1 (outbound doorbells) must be 16MB+ in 32-bit address space */
2778 if (!(pci_resource_flags(pdev, BAR_1) & IORESOURCE_MEM) ||
2779 pci_resource_flags(pdev, BAR_1) & IORESOURCE_MEM_64 ||
2780 pci_resource_len(pdev, BAR_1) < TSI721_DB_WIN_SIZE) {
2781 tsi_err(&pdev->dev, "Missing or misconfigured Doorbell BAR1");
2782 err = -ENODEV;
2783 goto err_disable_pdev;
2784 }
2785
2786 /*
2787 * BAR_2 and BAR_4 (outbound translation) must be in 64-bit PCIe address
2788 * space.
2789 * NOTE: BAR_2 and BAR_4 are not used by this version of driver.
2790 * It may be a good idea to keep them disabled using HW configuration
2791 * to save PCI memory space.
2792 */
2793
2794 priv->p2r_bar[0].size = priv->p2r_bar[1].size = 0;
2795
2796 if (pci_resource_flags(pdev, BAR_2) & IORESOURCE_MEM_64) {
2797 if (pci_resource_flags(pdev, BAR_2) & IORESOURCE_PREFETCH)
2798 tsi_debug(INIT, &pdev->dev,
2799 "Prefetchable OBW BAR2 will not be used");
2800 else {
2801 priv->p2r_bar[0].base = pci_resource_start(pdev, BAR_2);
2802 priv->p2r_bar[0].size = pci_resource_len(pdev, BAR_2);
2803 }
2804 }
2805
2806 if (pci_resource_flags(pdev, BAR_4) & IORESOURCE_MEM_64) {
2807 if (pci_resource_flags(pdev, BAR_4) & IORESOURCE_PREFETCH)
2808 tsi_debug(INIT, &pdev->dev,
2809 "Prefetchable OBW BAR4 will not be used");
2810 else {
2811 priv->p2r_bar[1].base = pci_resource_start(pdev, BAR_4);
2812 priv->p2r_bar[1].size = pci_resource_len(pdev, BAR_4);
2813 }
2814 }
2815
2816 err = pci_request_regions(pdev, DRV_NAME);
2817 if (err) {
2818 tsi_err(&pdev->dev, "Unable to obtain PCI resources");
2819 goto err_disable_pdev;
2820 }
2821
2822 pci_set_master(pdev);
2823
2824 priv->regs = pci_ioremap_bar(pdev, BAR_0);
2825 if (!priv->regs) {
2826 tsi_err(&pdev->dev, "Unable to map device registers space");
2827 err = -ENOMEM;
2828 goto err_free_res;
2829 }
2830
2831 priv->odb_base = pci_ioremap_bar(pdev, BAR_1);
2832 if (!priv->odb_base) {
2833 tsi_err(&pdev->dev, "Unable to map outbound doorbells space");
2834 err = -ENOMEM;
2835 goto err_unmap_bars;
2836 }
2837
2838 /* Configure DMA attributes. */
2839 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
2840 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2841 if (err) {
2842 tsi_err(&pdev->dev, "Unable to set DMA mask");
2843 goto err_unmap_bars;
2844 }
2845
2846 if (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)))
2847 tsi_info(&pdev->dev, "Unable to set consistent DMA mask");
2848 } else {
2849 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
2850 if (err)
2851 tsi_info(&pdev->dev, "Unable to set consistent DMA mask");
2852 }
2853
2854 BUG_ON(!pci_is_pcie(pdev));
2855
2856 /* Clear "no snoop" and "relaxed ordering" bits. */
2857 pcie_capability_clear_and_set_word(pdev, PCI_EXP_DEVCTL,
2858 PCI_EXP_DEVCTL_RELAX_EN | PCI_EXP_DEVCTL_NOSNOOP_EN, 0);
2859
2860 /* Override PCIe Maximum Read Request Size setting if requested */
2861 if (pcie_mrrs >= 0) {
2862 if (pcie_mrrs <= 5)
2863 pcie_capability_clear_and_set_word(pdev, PCI_EXP_DEVCTL,
2864 PCI_EXP_DEVCTL_READRQ, pcie_mrrs << 12);
2865 else
2866 tsi_info(&pdev->dev,
2867 "Invalid MRRS override value %d", pcie_mrrs);
2868 }
2869
2870 /* Set PCIe completion timeout to 1-10ms */
2871 pcie_capability_clear_and_set_word(pdev, PCI_EXP_DEVCTL2,
2872 PCI_EXP_DEVCTL2_COMP_TIMEOUT, 0x2);
2873
2874 /*
2875 * FIXUP: correct offsets of MSI-X tables in the MSI-X Capability Block
2876 */
2877 pci_write_config_dword(pdev, TSI721_PCIECFG_EPCTL, 0x01);
2878 pci_write_config_dword(pdev, TSI721_PCIECFG_MSIXTBL,
2879 TSI721_MSIXTBL_OFFSET);
2880 pci_write_config_dword(pdev, TSI721_PCIECFG_MSIXPBA,
2881 TSI721_MSIXPBA_OFFSET);
2882 pci_write_config_dword(pdev, TSI721_PCIECFG_EPCTL, 0);
2883 /* End of FIXUP */
2884
2885 tsi721_disable_ints(priv);
2886
2887 tsi721_init_pc2sr_mapping(priv);
2888 tsi721_init_sr2pc_mapping(priv);
2889
2890 if (tsi721_bdma_maint_init(priv)) {
2891 tsi_err(&pdev->dev, "BDMA initialization failed");
2892 err = -ENOMEM;
2893 goto err_unmap_bars;
2894 }
2895
2896 err = tsi721_doorbell_init(priv);
2897 if (err)
2898 goto err_free_bdma;
2899
2900 tsi721_port_write_init(priv);
2901
2902 err = tsi721_messages_init(priv);
2903 if (err)
2904 goto err_free_consistent;
2905
2906 err = tsi721_setup_mport(priv);
2907 if (err)
2908 goto err_free_consistent;
2909
2910 pci_set_drvdata(pdev, priv);
2911 tsi721_interrupts_init(priv);
2912
2913 return 0;
2914
2915err_free_consistent:
2916 tsi721_port_write_free(priv);
2917 tsi721_doorbell_free(priv);
2918err_free_bdma:
2919 tsi721_bdma_maint_free(priv);
2920err_unmap_bars:
2921 if (priv->regs)
2922 iounmap(priv->regs);
2923 if (priv->odb_base)
2924 iounmap(priv->odb_base);
2925err_free_res:
2926 pci_release_regions(pdev);
2927 pci_clear_master(pdev);
2928err_disable_pdev:
2929 pci_disable_device(pdev);
2930err_clean:
2931 kfree(priv);
2932err_exit:
2933 return err;
2934}
2935
2936static void tsi721_remove(struct pci_dev *pdev)
2937{
2938 struct tsi721_device *priv = pci_get_drvdata(pdev);
2939
2940 tsi_debug(EXIT, &pdev->dev, "enter");
2941
2942 tsi721_disable_ints(priv);
2943 tsi721_free_irq(priv);
2944 flush_scheduled_work();
2945 rio_unregister_mport(&priv->mport);
2946
2947 tsi721_unregister_dma(priv);
2948 tsi721_bdma_maint_free(priv);
2949 tsi721_doorbell_free(priv);
2950 tsi721_port_write_free(priv);
2951 tsi721_close_sr2pc_mapping(priv);
2952
2953 if (priv->regs)
2954 iounmap(priv->regs);
2955 if (priv->odb_base)
2956 iounmap(priv->odb_base);
2957#ifdef CONFIG_PCI_MSI
2958 if (priv->flags & TSI721_USING_MSIX)
2959 pci_disable_msix(priv->pdev);
2960 else if (priv->flags & TSI721_USING_MSI)
2961 pci_disable_msi(priv->pdev);
2962#endif
2963 pci_release_regions(pdev);
2964 pci_clear_master(pdev);
2965 pci_disable_device(pdev);
2966 pci_set_drvdata(pdev, NULL);
2967 kfree(priv);
2968 tsi_debug(EXIT, &pdev->dev, "exit");
2969}
2970
2971static void tsi721_shutdown(struct pci_dev *pdev)
2972{
2973 struct tsi721_device *priv = pci_get_drvdata(pdev);
2974
2975 tsi_debug(EXIT, &pdev->dev, "enter");
2976
2977 tsi721_disable_ints(priv);
2978 tsi721_dma_stop_all(priv);
2979 pci_clear_master(pdev);
2980 pci_disable_device(pdev);
2981}
2982
2983static const struct pci_device_id tsi721_pci_tbl[] = {
2984 { PCI_DEVICE(PCI_VENDOR_ID_IDT, PCI_DEVICE_ID_TSI721) },
2985 { 0, } /* terminate list */
2986};
2987
2988MODULE_DEVICE_TABLE(pci, tsi721_pci_tbl);
2989
2990static struct pci_driver tsi721_driver = {
2991 .name = "tsi721",
2992 .id_table = tsi721_pci_tbl,
2993 .probe = tsi721_probe,
2994 .remove = tsi721_remove,
2995 .shutdown = tsi721_shutdown,
2996};
2997
2998module_pci_driver(tsi721_driver);
2999
3000MODULE_DESCRIPTION("IDT Tsi721 PCIExpress-to-SRIO bridge driver");
3001MODULE_AUTHOR("Integrated Device Technology, Inc.");
3002MODULE_LICENSE("GPL");