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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Intel IXP4xx Ethernet driver for Linux
4 *
5 * Copyright (C) 2007 Krzysztof Halasa <khc@pm.waw.pl>
6 *
7 * Ethernet port config (0x00 is not present on IXP42X):
8 *
9 * logical port 0x00 0x10 0x20
10 * NPE 0 (NPE-A) 1 (NPE-B) 2 (NPE-C)
11 * physical PortId 2 0 1
12 * TX queue 23 24 25
13 * RX-free queue 26 27 28
14 * TX-done queue is always 31, per-port RX and TX-ready queues are configurable
15 *
16 * Queue entries:
17 * bits 0 -> 1 - NPE ID (RX and TX-done)
18 * bits 0 -> 2 - priority (TX, per 802.1D)
19 * bits 3 -> 4 - port ID (user-set?)
20 * bits 5 -> 31 - physical descriptor address
21 */
22
23#include <linux/delay.h>
24#include <linux/dma-mapping.h>
25#include <linux/dmapool.h>
26#include <linux/etherdevice.h>
27#include <linux/if_vlan.h>
28#include <linux/io.h>
29#include <linux/kernel.h>
30#include <linux/net_tstamp.h>
31#include <linux/of.h>
32#include <linux/of_mdio.h>
33#include <linux/of_net.h>
34#include <linux/phy.h>
35#include <linux/platform_device.h>
36#include <linux/ptp_classify.h>
37#include <linux/slab.h>
38#include <linux/module.h>
39#include <linux/soc/ixp4xx/npe.h>
40#include <linux/soc/ixp4xx/qmgr.h>
41#include <linux/soc/ixp4xx/cpu.h>
42#include <linux/types.h>
43
44#define IXP4XX_ETH_NPEA 0x00
45#define IXP4XX_ETH_NPEB 0x10
46#define IXP4XX_ETH_NPEC 0x20
47
48#include "ixp46x_ts.h"
49
50#define DEBUG_DESC 0
51#define DEBUG_RX 0
52#define DEBUG_TX 0
53#define DEBUG_PKT_BYTES 0
54#define DEBUG_MDIO 0
55#define DEBUG_CLOSE 0
56
57#define DRV_NAME "ixp4xx_eth"
58
59#define MAX_NPES 3
60
61#define RX_DESCS 64 /* also length of all RX queues */
62#define TX_DESCS 16 /* also length of all TX queues */
63#define TXDONE_QUEUE_LEN 64 /* dwords */
64
65#define POOL_ALLOC_SIZE (sizeof(struct desc) * (RX_DESCS + TX_DESCS))
66#define REGS_SIZE 0x1000
67
68/* MRU is said to be 14320 in a code dump, the SW manual says that
69 * MRU/MTU is 16320 and includes VLAN and ethernet headers.
70 * See "IXP400 Software Programmer's Guide" section 10.3.2, page 161.
71 *
72 * FIXME: we have chosen the safe default (14320) but if you can test
73 * jumboframes, experiment with 16320 and see what happens!
74 */
75#define MAX_MRU (14320 - VLAN_ETH_HLEN)
76#define RX_BUFF_SIZE ALIGN((NET_IP_ALIGN) + MAX_MRU, 4)
77
78#define NAPI_WEIGHT 16
79#define MDIO_INTERVAL (3 * HZ)
80#define MAX_MDIO_RETRIES 100 /* microseconds, typically 30 cycles */
81#define MAX_CLOSE_WAIT 1000 /* microseconds, typically 2-3 cycles */
82
83#define NPE_ID(port_id) ((port_id) >> 4)
84#define PHYSICAL_ID(port_id) ((NPE_ID(port_id) + 2) % 3)
85#define TX_QUEUE(port_id) (NPE_ID(port_id) + 23)
86#define RXFREE_QUEUE(port_id) (NPE_ID(port_id) + 26)
87#define TXDONE_QUEUE 31
88
89#define PTP_SLAVE_MODE 1
90#define PTP_MASTER_MODE 2
91#define PORT2CHANNEL(p) NPE_ID(p->id)
92
93/* TX Control Registers */
94#define TX_CNTRL0_TX_EN 0x01
95#define TX_CNTRL0_HALFDUPLEX 0x02
96#define TX_CNTRL0_RETRY 0x04
97#define TX_CNTRL0_PAD_EN 0x08
98#define TX_CNTRL0_APPEND_FCS 0x10
99#define TX_CNTRL0_2DEFER 0x20
100#define TX_CNTRL0_RMII 0x40 /* reduced MII */
101#define TX_CNTRL1_RETRIES 0x0F /* 4 bits */
102
103/* RX Control Registers */
104#define RX_CNTRL0_RX_EN 0x01
105#define RX_CNTRL0_PADSTRIP_EN 0x02
106#define RX_CNTRL0_SEND_FCS 0x04
107#define RX_CNTRL0_PAUSE_EN 0x08
108#define RX_CNTRL0_LOOP_EN 0x10
109#define RX_CNTRL0_ADDR_FLTR_EN 0x20
110#define RX_CNTRL0_RX_RUNT_EN 0x40
111#define RX_CNTRL0_BCAST_DIS 0x80
112#define RX_CNTRL1_DEFER_EN 0x01
113
114/* Core Control Register */
115#define CORE_RESET 0x01
116#define CORE_RX_FIFO_FLUSH 0x02
117#define CORE_TX_FIFO_FLUSH 0x04
118#define CORE_SEND_JAM 0x08
119#define CORE_MDC_EN 0x10 /* MDIO using NPE-B ETH-0 only */
120
121#define DEFAULT_TX_CNTRL0 (TX_CNTRL0_TX_EN | TX_CNTRL0_RETRY | \
122 TX_CNTRL0_PAD_EN | TX_CNTRL0_APPEND_FCS | \
123 TX_CNTRL0_2DEFER)
124#define DEFAULT_RX_CNTRL0 RX_CNTRL0_RX_EN
125#define DEFAULT_CORE_CNTRL CORE_MDC_EN
126
127
128/* NPE message codes */
129#define NPE_GETSTATUS 0x00
130#define NPE_EDB_SETPORTADDRESS 0x01
131#define NPE_EDB_GETMACADDRESSDATABASE 0x02
132#define NPE_EDB_SETMACADDRESSSDATABASE 0x03
133#define NPE_GETSTATS 0x04
134#define NPE_RESETSTATS 0x05
135#define NPE_SETMAXFRAMELENGTHS 0x06
136#define NPE_VLAN_SETRXTAGMODE 0x07
137#define NPE_VLAN_SETDEFAULTRXVID 0x08
138#define NPE_VLAN_SETPORTVLANTABLEENTRY 0x09
139#define NPE_VLAN_SETPORTVLANTABLERANGE 0x0A
140#define NPE_VLAN_SETRXQOSENTRY 0x0B
141#define NPE_VLAN_SETPORTIDEXTRACTIONMODE 0x0C
142#define NPE_STP_SETBLOCKINGSTATE 0x0D
143#define NPE_FW_SETFIREWALLMODE 0x0E
144#define NPE_PC_SETFRAMECONTROLDURATIONID 0x0F
145#define NPE_PC_SETAPMACTABLE 0x11
146#define NPE_SETLOOPBACK_MODE 0x12
147#define NPE_PC_SETBSSIDTABLE 0x13
148#define NPE_ADDRESS_FILTER_CONFIG 0x14
149#define NPE_APPENDFCSCONFIG 0x15
150#define NPE_NOTIFY_MAC_RECOVERY_DONE 0x16
151#define NPE_MAC_RECOVERY_START 0x17
152
153
154#ifdef __ARMEB__
155typedef struct sk_buff buffer_t;
156#define free_buffer dev_kfree_skb
157#define free_buffer_irq dev_consume_skb_irq
158#else
159typedef void buffer_t;
160#define free_buffer kfree
161#define free_buffer_irq kfree
162#endif
163
164/* Information about built-in Ethernet MAC interfaces */
165struct eth_plat_info {
166 u8 rxq; /* configurable, currently 0 - 31 only */
167 u8 txreadyq;
168 u8 hwaddr[ETH_ALEN];
169 u8 npe; /* NPE instance used by this interface */
170 bool has_mdio; /* If this instance has an MDIO bus */
171};
172
173struct eth_regs {
174 u32 tx_control[2], __res1[2]; /* 000 */
175 u32 rx_control[2], __res2[2]; /* 010 */
176 u32 random_seed, __res3[3]; /* 020 */
177 u32 partial_empty_threshold, __res4; /* 030 */
178 u32 partial_full_threshold, __res5; /* 038 */
179 u32 tx_start_bytes, __res6[3]; /* 040 */
180 u32 tx_deferral, rx_deferral, __res7[2];/* 050 */
181 u32 tx_2part_deferral[2], __res8[2]; /* 060 */
182 u32 slot_time, __res9[3]; /* 070 */
183 u32 mdio_command[4]; /* 080 */
184 u32 mdio_status[4]; /* 090 */
185 u32 mcast_mask[6], __res10[2]; /* 0A0 */
186 u32 mcast_addr[6], __res11[2]; /* 0C0 */
187 u32 int_clock_threshold, __res12[3]; /* 0E0 */
188 u32 hw_addr[6], __res13[61]; /* 0F0 */
189 u32 core_control; /* 1FC */
190};
191
192struct port {
193 struct eth_regs __iomem *regs;
194 struct ixp46x_ts_regs __iomem *timesync_regs;
195 int phc_index;
196 struct npe *npe;
197 struct net_device *netdev;
198 struct napi_struct napi;
199 struct eth_plat_info *plat;
200 buffer_t *rx_buff_tab[RX_DESCS], *tx_buff_tab[TX_DESCS];
201 struct desc *desc_tab; /* coherent */
202 dma_addr_t desc_tab_phys;
203 int id; /* logical port ID */
204 int speed, duplex;
205 u8 firmware[4];
206 int hwts_tx_en;
207 int hwts_rx_en;
208};
209
210/* NPE message structure */
211struct msg {
212#ifdef __ARMEB__
213 u8 cmd, eth_id, byte2, byte3;
214 u8 byte4, byte5, byte6, byte7;
215#else
216 u8 byte3, byte2, eth_id, cmd;
217 u8 byte7, byte6, byte5, byte4;
218#endif
219};
220
221/* Ethernet packet descriptor */
222struct desc {
223 u32 next; /* pointer to next buffer, unused */
224
225#ifdef __ARMEB__
226 u16 buf_len; /* buffer length */
227 u16 pkt_len; /* packet length */
228 u32 data; /* pointer to data buffer in RAM */
229 u8 dest_id;
230 u8 src_id;
231 u16 flags;
232 u8 qos;
233 u8 padlen;
234 u16 vlan_tci;
235#else
236 u16 pkt_len; /* packet length */
237 u16 buf_len; /* buffer length */
238 u32 data; /* pointer to data buffer in RAM */
239 u16 flags;
240 u8 src_id;
241 u8 dest_id;
242 u16 vlan_tci;
243 u8 padlen;
244 u8 qos;
245#endif
246
247#ifdef __ARMEB__
248 u8 dst_mac_0, dst_mac_1, dst_mac_2, dst_mac_3;
249 u8 dst_mac_4, dst_mac_5, src_mac_0, src_mac_1;
250 u8 src_mac_2, src_mac_3, src_mac_4, src_mac_5;
251#else
252 u8 dst_mac_3, dst_mac_2, dst_mac_1, dst_mac_0;
253 u8 src_mac_1, src_mac_0, dst_mac_5, dst_mac_4;
254 u8 src_mac_5, src_mac_4, src_mac_3, src_mac_2;
255#endif
256};
257
258
259#define rx_desc_phys(port, n) ((port)->desc_tab_phys + \
260 (n) * sizeof(struct desc))
261#define rx_desc_ptr(port, n) (&(port)->desc_tab[n])
262
263#define tx_desc_phys(port, n) ((port)->desc_tab_phys + \
264 ((n) + RX_DESCS) * sizeof(struct desc))
265#define tx_desc_ptr(port, n) (&(port)->desc_tab[(n) + RX_DESCS])
266
267#ifndef __ARMEB__
268static inline void memcpy_swab32(u32 *dest, u32 *src, int cnt)
269{
270 int i;
271 for (i = 0; i < cnt; i++)
272 dest[i] = swab32(src[i]);
273}
274#endif
275
276static DEFINE_SPINLOCK(mdio_lock);
277static struct eth_regs __iomem *mdio_regs; /* mdio command and status only */
278static struct mii_bus *mdio_bus;
279static struct device_node *mdio_bus_np;
280static int ports_open;
281static struct port *npe_port_tab[MAX_NPES];
282static struct dma_pool *dma_pool;
283
284static int ixp_ptp_match(struct sk_buff *skb, u16 uid_hi, u32 uid_lo, u16 seqid)
285{
286 u8 *data = skb->data;
287 unsigned int offset;
288 u16 *hi, *id;
289 u32 lo;
290
291 if (ptp_classify_raw(skb) != PTP_CLASS_V1_IPV4)
292 return 0;
293
294 offset = ETH_HLEN + IPV4_HLEN(data) + UDP_HLEN;
295
296 if (skb->len < offset + OFF_PTP_SEQUENCE_ID + sizeof(seqid))
297 return 0;
298
299 hi = (u16 *)(data + offset + OFF_PTP_SOURCE_UUID);
300 id = (u16 *)(data + offset + OFF_PTP_SEQUENCE_ID);
301
302 memcpy(&lo, &hi[1], sizeof(lo));
303
304 return (uid_hi == ntohs(*hi) &&
305 uid_lo == ntohl(lo) &&
306 seqid == ntohs(*id));
307}
308
309static void ixp_rx_timestamp(struct port *port, struct sk_buff *skb)
310{
311 struct skb_shared_hwtstamps *shhwtstamps;
312 struct ixp46x_ts_regs *regs;
313 u64 ns;
314 u32 ch, hi, lo, val;
315 u16 uid, seq;
316
317 if (!port->hwts_rx_en)
318 return;
319
320 ch = PORT2CHANNEL(port);
321
322 regs = port->timesync_regs;
323
324 val = __raw_readl(®s->channel[ch].ch_event);
325
326 if (!(val & RX_SNAPSHOT_LOCKED))
327 return;
328
329 lo = __raw_readl(®s->channel[ch].src_uuid_lo);
330 hi = __raw_readl(®s->channel[ch].src_uuid_hi);
331
332 uid = hi & 0xffff;
333 seq = (hi >> 16) & 0xffff;
334
335 if (!ixp_ptp_match(skb, htons(uid), htonl(lo), htons(seq)))
336 goto out;
337
338 lo = __raw_readl(®s->channel[ch].rx_snap_lo);
339 hi = __raw_readl(®s->channel[ch].rx_snap_hi);
340 ns = ((u64) hi) << 32;
341 ns |= lo;
342 ns <<= TICKS_NS_SHIFT;
343
344 shhwtstamps = skb_hwtstamps(skb);
345 memset(shhwtstamps, 0, sizeof(*shhwtstamps));
346 shhwtstamps->hwtstamp = ns_to_ktime(ns);
347out:
348 __raw_writel(RX_SNAPSHOT_LOCKED, ®s->channel[ch].ch_event);
349}
350
351static void ixp_tx_timestamp(struct port *port, struct sk_buff *skb)
352{
353 struct skb_shared_hwtstamps shhwtstamps;
354 struct ixp46x_ts_regs *regs;
355 struct skb_shared_info *shtx;
356 u64 ns;
357 u32 ch, cnt, hi, lo, val;
358
359 shtx = skb_shinfo(skb);
360 if (unlikely(shtx->tx_flags & SKBTX_HW_TSTAMP && port->hwts_tx_en))
361 shtx->tx_flags |= SKBTX_IN_PROGRESS;
362 else
363 return;
364
365 ch = PORT2CHANNEL(port);
366
367 regs = port->timesync_regs;
368
369 /*
370 * This really stinks, but we have to poll for the Tx time stamp.
371 * Usually, the time stamp is ready after 4 to 6 microseconds.
372 */
373 for (cnt = 0; cnt < 100; cnt++) {
374 val = __raw_readl(®s->channel[ch].ch_event);
375 if (val & TX_SNAPSHOT_LOCKED)
376 break;
377 udelay(1);
378 }
379 if (!(val & TX_SNAPSHOT_LOCKED)) {
380 shtx->tx_flags &= ~SKBTX_IN_PROGRESS;
381 return;
382 }
383
384 lo = __raw_readl(®s->channel[ch].tx_snap_lo);
385 hi = __raw_readl(®s->channel[ch].tx_snap_hi);
386 ns = ((u64) hi) << 32;
387 ns |= lo;
388 ns <<= TICKS_NS_SHIFT;
389
390 memset(&shhwtstamps, 0, sizeof(shhwtstamps));
391 shhwtstamps.hwtstamp = ns_to_ktime(ns);
392 skb_tstamp_tx(skb, &shhwtstamps);
393
394 __raw_writel(TX_SNAPSHOT_LOCKED, ®s->channel[ch].ch_event);
395}
396
397static int hwtstamp_set(struct net_device *netdev, struct ifreq *ifr)
398{
399 struct hwtstamp_config cfg;
400 struct ixp46x_ts_regs *regs;
401 struct port *port = netdev_priv(netdev);
402 int ret;
403 int ch;
404
405 if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg)))
406 return -EFAULT;
407
408 ret = ixp46x_ptp_find(&port->timesync_regs, &port->phc_index);
409 if (ret)
410 return ret;
411
412 ch = PORT2CHANNEL(port);
413 regs = port->timesync_regs;
414
415 if (cfg.tx_type != HWTSTAMP_TX_OFF && cfg.tx_type != HWTSTAMP_TX_ON)
416 return -ERANGE;
417
418 switch (cfg.rx_filter) {
419 case HWTSTAMP_FILTER_NONE:
420 port->hwts_rx_en = 0;
421 break;
422 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
423 port->hwts_rx_en = PTP_SLAVE_MODE;
424 __raw_writel(0, ®s->channel[ch].ch_control);
425 break;
426 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
427 port->hwts_rx_en = PTP_MASTER_MODE;
428 __raw_writel(MASTER_MODE, ®s->channel[ch].ch_control);
429 break;
430 default:
431 return -ERANGE;
432 }
433
434 port->hwts_tx_en = cfg.tx_type == HWTSTAMP_TX_ON;
435
436 /* Clear out any old time stamps. */
437 __raw_writel(TX_SNAPSHOT_LOCKED | RX_SNAPSHOT_LOCKED,
438 ®s->channel[ch].ch_event);
439
440 return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;
441}
442
443static int hwtstamp_get(struct net_device *netdev, struct ifreq *ifr)
444{
445 struct hwtstamp_config cfg;
446 struct port *port = netdev_priv(netdev);
447
448 cfg.flags = 0;
449 cfg.tx_type = port->hwts_tx_en ? HWTSTAMP_TX_ON : HWTSTAMP_TX_OFF;
450
451 switch (port->hwts_rx_en) {
452 case 0:
453 cfg.rx_filter = HWTSTAMP_FILTER_NONE;
454 break;
455 case PTP_SLAVE_MODE:
456 cfg.rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_SYNC;
457 break;
458 case PTP_MASTER_MODE:
459 cfg.rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ;
460 break;
461 default:
462 WARN_ON_ONCE(1);
463 return -ERANGE;
464 }
465
466 return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;
467}
468
469static int ixp4xx_mdio_cmd(struct mii_bus *bus, int phy_id, int location,
470 int write, u16 cmd)
471{
472 int cycles = 0;
473
474 if (__raw_readl(&mdio_regs->mdio_command[3]) & 0x80) {
475 printk(KERN_ERR "%s: MII not ready to transmit\n", bus->name);
476 return -1;
477 }
478
479 if (write) {
480 __raw_writel(cmd & 0xFF, &mdio_regs->mdio_command[0]);
481 __raw_writel(cmd >> 8, &mdio_regs->mdio_command[1]);
482 }
483 __raw_writel(((phy_id << 5) | location) & 0xFF,
484 &mdio_regs->mdio_command[2]);
485 __raw_writel((phy_id >> 3) | (write << 2) | 0x80 /* GO */,
486 &mdio_regs->mdio_command[3]);
487
488 while ((cycles < MAX_MDIO_RETRIES) &&
489 (__raw_readl(&mdio_regs->mdio_command[3]) & 0x80)) {
490 udelay(1);
491 cycles++;
492 }
493
494 if (cycles == MAX_MDIO_RETRIES) {
495 printk(KERN_ERR "%s #%i: MII write failed\n", bus->name,
496 phy_id);
497 return -1;
498 }
499
500#if DEBUG_MDIO
501 printk(KERN_DEBUG "%s #%i: mdio_%s() took %i cycles\n", bus->name,
502 phy_id, write ? "write" : "read", cycles);
503#endif
504
505 if (write)
506 return 0;
507
508 if (__raw_readl(&mdio_regs->mdio_status[3]) & 0x80) {
509#if DEBUG_MDIO
510 printk(KERN_DEBUG "%s #%i: MII read failed\n", bus->name,
511 phy_id);
512#endif
513 return 0xFFFF; /* don't return error */
514 }
515
516 return (__raw_readl(&mdio_regs->mdio_status[0]) & 0xFF) |
517 ((__raw_readl(&mdio_regs->mdio_status[1]) & 0xFF) << 8);
518}
519
520static int ixp4xx_mdio_read(struct mii_bus *bus, int phy_id, int location)
521{
522 unsigned long flags;
523 int ret;
524
525 spin_lock_irqsave(&mdio_lock, flags);
526 ret = ixp4xx_mdio_cmd(bus, phy_id, location, 0, 0);
527 spin_unlock_irqrestore(&mdio_lock, flags);
528#if DEBUG_MDIO
529 printk(KERN_DEBUG "%s #%i: MII read [%i] -> 0x%X\n", bus->name,
530 phy_id, location, ret);
531#endif
532 return ret;
533}
534
535static int ixp4xx_mdio_write(struct mii_bus *bus, int phy_id, int location,
536 u16 val)
537{
538 unsigned long flags;
539 int ret;
540
541 spin_lock_irqsave(&mdio_lock, flags);
542 ret = ixp4xx_mdio_cmd(bus, phy_id, location, 1, val);
543 spin_unlock_irqrestore(&mdio_lock, flags);
544#if DEBUG_MDIO
545 printk(KERN_DEBUG "%s #%i: MII write [%i] <- 0x%X, err = %i\n",
546 bus->name, phy_id, location, val, ret);
547#endif
548 return ret;
549}
550
551static int ixp4xx_mdio_register(struct eth_regs __iomem *regs)
552{
553 int err;
554
555 if (!(mdio_bus = mdiobus_alloc()))
556 return -ENOMEM;
557
558 mdio_regs = regs;
559 __raw_writel(DEFAULT_CORE_CNTRL, &mdio_regs->core_control);
560 mdio_bus->name = "IXP4xx MII Bus";
561 mdio_bus->read = &ixp4xx_mdio_read;
562 mdio_bus->write = &ixp4xx_mdio_write;
563 snprintf(mdio_bus->id, MII_BUS_ID_SIZE, "ixp4xx-eth-0");
564
565 err = of_mdiobus_register(mdio_bus, mdio_bus_np);
566 if (err)
567 mdiobus_free(mdio_bus);
568 return err;
569}
570
571static void ixp4xx_mdio_remove(void)
572{
573 mdiobus_unregister(mdio_bus);
574 mdiobus_free(mdio_bus);
575}
576
577
578static void ixp4xx_adjust_link(struct net_device *dev)
579{
580 struct port *port = netdev_priv(dev);
581 struct phy_device *phydev = dev->phydev;
582
583 if (!phydev->link) {
584 if (port->speed) {
585 port->speed = 0;
586 printk(KERN_INFO "%s: link down\n", dev->name);
587 }
588 return;
589 }
590
591 if (port->speed == phydev->speed && port->duplex == phydev->duplex)
592 return;
593
594 port->speed = phydev->speed;
595 port->duplex = phydev->duplex;
596
597 if (port->duplex)
598 __raw_writel(DEFAULT_TX_CNTRL0 & ~TX_CNTRL0_HALFDUPLEX,
599 &port->regs->tx_control[0]);
600 else
601 __raw_writel(DEFAULT_TX_CNTRL0 | TX_CNTRL0_HALFDUPLEX,
602 &port->regs->tx_control[0]);
603
604 netdev_info(dev, "%s: link up, speed %u Mb/s, %s duplex\n",
605 dev->name, port->speed, port->duplex ? "full" : "half");
606}
607
608
609static inline void debug_pkt(struct net_device *dev, const char *func,
610 u8 *data, int len)
611{
612#if DEBUG_PKT_BYTES
613 int i;
614
615 netdev_debug(dev, "%s(%i) ", func, len);
616 for (i = 0; i < len; i++) {
617 if (i >= DEBUG_PKT_BYTES)
618 break;
619 printk("%s%02X",
620 ((i == 6) || (i == 12) || (i >= 14)) ? " " : "",
621 data[i]);
622 }
623 printk("\n");
624#endif
625}
626
627
628static inline void debug_desc(u32 phys, struct desc *desc)
629{
630#if DEBUG_DESC
631 printk(KERN_DEBUG "%X: %X %3X %3X %08X %2X < %2X %4X %X"
632 " %X %X %02X%02X%02X%02X%02X%02X < %02X%02X%02X%02X%02X%02X\n",
633 phys, desc->next, desc->buf_len, desc->pkt_len,
634 desc->data, desc->dest_id, desc->src_id, desc->flags,
635 desc->qos, desc->padlen, desc->vlan_tci,
636 desc->dst_mac_0, desc->dst_mac_1, desc->dst_mac_2,
637 desc->dst_mac_3, desc->dst_mac_4, desc->dst_mac_5,
638 desc->src_mac_0, desc->src_mac_1, desc->src_mac_2,
639 desc->src_mac_3, desc->src_mac_4, desc->src_mac_5);
640#endif
641}
642
643static inline int queue_get_desc(unsigned int queue, struct port *port,
644 int is_tx)
645{
646 u32 phys, tab_phys, n_desc;
647 struct desc *tab;
648
649 if (!(phys = qmgr_get_entry(queue)))
650 return -1;
651
652 phys &= ~0x1F; /* mask out non-address bits */
653 tab_phys = is_tx ? tx_desc_phys(port, 0) : rx_desc_phys(port, 0);
654 tab = is_tx ? tx_desc_ptr(port, 0) : rx_desc_ptr(port, 0);
655 n_desc = (phys - tab_phys) / sizeof(struct desc);
656 BUG_ON(n_desc >= (is_tx ? TX_DESCS : RX_DESCS));
657 debug_desc(phys, &tab[n_desc]);
658 BUG_ON(tab[n_desc].next);
659 return n_desc;
660}
661
662static inline void queue_put_desc(unsigned int queue, u32 phys,
663 struct desc *desc)
664{
665 debug_desc(phys, desc);
666 BUG_ON(phys & 0x1F);
667 qmgr_put_entry(queue, phys);
668 /* Don't check for queue overflow here, we've allocated sufficient
669 length and queues >= 32 don't support this check anyway. */
670}
671
672
673static inline void dma_unmap_tx(struct port *port, struct desc *desc)
674{
675#ifdef __ARMEB__
676 dma_unmap_single(&port->netdev->dev, desc->data,
677 desc->buf_len, DMA_TO_DEVICE);
678#else
679 dma_unmap_single(&port->netdev->dev, desc->data & ~3,
680 ALIGN((desc->data & 3) + desc->buf_len, 4),
681 DMA_TO_DEVICE);
682#endif
683}
684
685
686static void eth_rx_irq(void *pdev)
687{
688 struct net_device *dev = pdev;
689 struct port *port = netdev_priv(dev);
690
691#if DEBUG_RX
692 printk(KERN_DEBUG "%s: eth_rx_irq\n", dev->name);
693#endif
694 qmgr_disable_irq(port->plat->rxq);
695 napi_schedule(&port->napi);
696}
697
698static int eth_poll(struct napi_struct *napi, int budget)
699{
700 struct port *port = container_of(napi, struct port, napi);
701 struct net_device *dev = port->netdev;
702 unsigned int rxq = port->plat->rxq, rxfreeq = RXFREE_QUEUE(port->id);
703 int received = 0;
704
705#if DEBUG_RX
706 netdev_debug(dev, "eth_poll\n");
707#endif
708
709 while (received < budget) {
710 struct sk_buff *skb;
711 struct desc *desc;
712 int n;
713#ifdef __ARMEB__
714 struct sk_buff *temp;
715 u32 phys;
716#endif
717
718 if ((n = queue_get_desc(rxq, port, 0)) < 0) {
719#if DEBUG_RX
720 netdev_debug(dev, "eth_poll napi_complete\n");
721#endif
722 napi_complete(napi);
723 qmgr_enable_irq(rxq);
724 if (!qmgr_stat_below_low_watermark(rxq) &&
725 napi_schedule(napi)) { /* not empty again */
726#if DEBUG_RX
727 netdev_debug(dev, "eth_poll napi_schedule succeeded\n");
728#endif
729 qmgr_disable_irq(rxq);
730 continue;
731 }
732#if DEBUG_RX
733 netdev_debug(dev, "eth_poll all done\n");
734#endif
735 return received; /* all work done */
736 }
737
738 desc = rx_desc_ptr(port, n);
739
740#ifdef __ARMEB__
741 if ((skb = netdev_alloc_skb(dev, RX_BUFF_SIZE))) {
742 phys = dma_map_single(&dev->dev, skb->data,
743 RX_BUFF_SIZE, DMA_FROM_DEVICE);
744 if (dma_mapping_error(&dev->dev, phys)) {
745 dev_kfree_skb(skb);
746 skb = NULL;
747 }
748 }
749#else
750 skb = netdev_alloc_skb(dev,
751 ALIGN(NET_IP_ALIGN + desc->pkt_len, 4));
752#endif
753
754 if (!skb) {
755 dev->stats.rx_dropped++;
756 /* put the desc back on RX-ready queue */
757 desc->buf_len = MAX_MRU;
758 desc->pkt_len = 0;
759 queue_put_desc(rxfreeq, rx_desc_phys(port, n), desc);
760 continue;
761 }
762
763 /* process received frame */
764#ifdef __ARMEB__
765 temp = skb;
766 skb = port->rx_buff_tab[n];
767 dma_unmap_single(&dev->dev, desc->data - NET_IP_ALIGN,
768 RX_BUFF_SIZE, DMA_FROM_DEVICE);
769#else
770 dma_sync_single_for_cpu(&dev->dev, desc->data - NET_IP_ALIGN,
771 RX_BUFF_SIZE, DMA_FROM_DEVICE);
772 memcpy_swab32((u32 *)skb->data, (u32 *)port->rx_buff_tab[n],
773 ALIGN(NET_IP_ALIGN + desc->pkt_len, 4) / 4);
774#endif
775 skb_reserve(skb, NET_IP_ALIGN);
776 skb_put(skb, desc->pkt_len);
777
778 debug_pkt(dev, "eth_poll", skb->data, skb->len);
779
780 ixp_rx_timestamp(port, skb);
781 skb->protocol = eth_type_trans(skb, dev);
782 dev->stats.rx_packets++;
783 dev->stats.rx_bytes += skb->len;
784 netif_receive_skb(skb);
785
786 /* put the new buffer on RX-free queue */
787#ifdef __ARMEB__
788 port->rx_buff_tab[n] = temp;
789 desc->data = phys + NET_IP_ALIGN;
790#endif
791 desc->buf_len = MAX_MRU;
792 desc->pkt_len = 0;
793 queue_put_desc(rxfreeq, rx_desc_phys(port, n), desc);
794 received++;
795 }
796
797#if DEBUG_RX
798 netdev_debug(dev, "eth_poll(): end, not all work done\n");
799#endif
800 return received; /* not all work done */
801}
802
803
804static void eth_txdone_irq(void *unused)
805{
806 u32 phys;
807
808#if DEBUG_TX
809 printk(KERN_DEBUG DRV_NAME ": eth_txdone_irq\n");
810#endif
811 while ((phys = qmgr_get_entry(TXDONE_QUEUE)) != 0) {
812 u32 npe_id, n_desc;
813 struct port *port;
814 struct desc *desc;
815 int start;
816
817 npe_id = phys & 3;
818 BUG_ON(npe_id >= MAX_NPES);
819 port = npe_port_tab[npe_id];
820 BUG_ON(!port);
821 phys &= ~0x1F; /* mask out non-address bits */
822 n_desc = (phys - tx_desc_phys(port, 0)) / sizeof(struct desc);
823 BUG_ON(n_desc >= TX_DESCS);
824 desc = tx_desc_ptr(port, n_desc);
825 debug_desc(phys, desc);
826
827 if (port->tx_buff_tab[n_desc]) { /* not the draining packet */
828 port->netdev->stats.tx_packets++;
829 port->netdev->stats.tx_bytes += desc->pkt_len;
830
831 dma_unmap_tx(port, desc);
832#if DEBUG_TX
833 printk(KERN_DEBUG "%s: eth_txdone_irq free %p\n",
834 port->netdev->name, port->tx_buff_tab[n_desc]);
835#endif
836 free_buffer_irq(port->tx_buff_tab[n_desc]);
837 port->tx_buff_tab[n_desc] = NULL;
838 }
839
840 start = qmgr_stat_below_low_watermark(port->plat->txreadyq);
841 queue_put_desc(port->plat->txreadyq, phys, desc);
842 if (start) { /* TX-ready queue was empty */
843#if DEBUG_TX
844 printk(KERN_DEBUG "%s: eth_txdone_irq xmit ready\n",
845 port->netdev->name);
846#endif
847 netif_wake_queue(port->netdev);
848 }
849 }
850}
851
852static netdev_tx_t eth_xmit(struct sk_buff *skb, struct net_device *dev)
853{
854 struct port *port = netdev_priv(dev);
855 unsigned int txreadyq = port->plat->txreadyq;
856 int len, offset, bytes, n;
857 void *mem;
858 u32 phys;
859 struct desc *desc;
860
861#if DEBUG_TX
862 netdev_debug(dev, "eth_xmit\n");
863#endif
864
865 if (unlikely(skb->len > MAX_MRU)) {
866 dev_kfree_skb(skb);
867 dev->stats.tx_errors++;
868 return NETDEV_TX_OK;
869 }
870
871 debug_pkt(dev, "eth_xmit", skb->data, skb->len);
872
873 len = skb->len;
874#ifdef __ARMEB__
875 offset = 0; /* no need to keep alignment */
876 bytes = len;
877 mem = skb->data;
878#else
879 offset = (uintptr_t)skb->data & 3; /* keep 32-bit alignment */
880 bytes = ALIGN(offset + len, 4);
881 if (!(mem = kmalloc(bytes, GFP_ATOMIC))) {
882 dev_kfree_skb(skb);
883 dev->stats.tx_dropped++;
884 return NETDEV_TX_OK;
885 }
886 memcpy_swab32(mem, (u32 *)((uintptr_t)skb->data & ~3), bytes / 4);
887#endif
888
889 phys = dma_map_single(&dev->dev, mem, bytes, DMA_TO_DEVICE);
890 if (dma_mapping_error(&dev->dev, phys)) {
891 dev_kfree_skb(skb);
892#ifndef __ARMEB__
893 kfree(mem);
894#endif
895 dev->stats.tx_dropped++;
896 return NETDEV_TX_OK;
897 }
898
899 n = queue_get_desc(txreadyq, port, 1);
900 BUG_ON(n < 0);
901 desc = tx_desc_ptr(port, n);
902
903#ifdef __ARMEB__
904 port->tx_buff_tab[n] = skb;
905#else
906 port->tx_buff_tab[n] = mem;
907#endif
908 desc->data = phys + offset;
909 desc->buf_len = desc->pkt_len = len;
910
911 /* NPE firmware pads short frames with zeros internally */
912 wmb();
913 queue_put_desc(TX_QUEUE(port->id), tx_desc_phys(port, n), desc);
914
915 if (qmgr_stat_below_low_watermark(txreadyq)) { /* empty */
916#if DEBUG_TX
917 netdev_debug(dev, "eth_xmit queue full\n");
918#endif
919 netif_stop_queue(dev);
920 /* we could miss TX ready interrupt */
921 /* really empty in fact */
922 if (!qmgr_stat_below_low_watermark(txreadyq)) {
923#if DEBUG_TX
924 netdev_debug(dev, "eth_xmit ready again\n");
925#endif
926 netif_wake_queue(dev);
927 }
928 }
929
930#if DEBUG_TX
931 netdev_debug(dev, "eth_xmit end\n");
932#endif
933
934 ixp_tx_timestamp(port, skb);
935 skb_tx_timestamp(skb);
936
937#ifndef __ARMEB__
938 dev_kfree_skb(skb);
939#endif
940 return NETDEV_TX_OK;
941}
942
943
944static void eth_set_mcast_list(struct net_device *dev)
945{
946 struct port *port = netdev_priv(dev);
947 struct netdev_hw_addr *ha;
948 u8 diffs[ETH_ALEN], *addr;
949 int i;
950 static const u8 allmulti[] = { 0x01, 0x00, 0x00, 0x00, 0x00, 0x00 };
951
952 if ((dev->flags & IFF_ALLMULTI) && !(dev->flags & IFF_PROMISC)) {
953 for (i = 0; i < ETH_ALEN; i++) {
954 __raw_writel(allmulti[i], &port->regs->mcast_addr[i]);
955 __raw_writel(allmulti[i], &port->regs->mcast_mask[i]);
956 }
957 __raw_writel(DEFAULT_RX_CNTRL0 | RX_CNTRL0_ADDR_FLTR_EN,
958 &port->regs->rx_control[0]);
959 return;
960 }
961
962 if ((dev->flags & IFF_PROMISC) || netdev_mc_empty(dev)) {
963 __raw_writel(DEFAULT_RX_CNTRL0 & ~RX_CNTRL0_ADDR_FLTR_EN,
964 &port->regs->rx_control[0]);
965 return;
966 }
967
968 eth_zero_addr(diffs);
969
970 addr = NULL;
971 netdev_for_each_mc_addr(ha, dev) {
972 if (!addr)
973 addr = ha->addr; /* first MAC address */
974 for (i = 0; i < ETH_ALEN; i++)
975 diffs[i] |= addr[i] ^ ha->addr[i];
976 }
977
978 for (i = 0; i < ETH_ALEN; i++) {
979 __raw_writel(addr[i], &port->regs->mcast_addr[i]);
980 __raw_writel(~diffs[i], &port->regs->mcast_mask[i]);
981 }
982
983 __raw_writel(DEFAULT_RX_CNTRL0 | RX_CNTRL0_ADDR_FLTR_EN,
984 &port->regs->rx_control[0]);
985}
986
987
988static int eth_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
989{
990 if (!netif_running(dev))
991 return -EINVAL;
992
993 if (cpu_is_ixp46x()) {
994 if (cmd == SIOCSHWTSTAMP)
995 return hwtstamp_set(dev, req);
996 if (cmd == SIOCGHWTSTAMP)
997 return hwtstamp_get(dev, req);
998 }
999
1000 return phy_mii_ioctl(dev->phydev, req, cmd);
1001}
1002
1003/* ethtool support */
1004
1005static void ixp4xx_get_drvinfo(struct net_device *dev,
1006 struct ethtool_drvinfo *info)
1007{
1008 struct port *port = netdev_priv(dev);
1009
1010 strscpy(info->driver, DRV_NAME, sizeof(info->driver));
1011 snprintf(info->fw_version, sizeof(info->fw_version), "%u:%u:%u:%u",
1012 port->firmware[0], port->firmware[1],
1013 port->firmware[2], port->firmware[3]);
1014 strscpy(info->bus_info, "internal", sizeof(info->bus_info));
1015}
1016
1017static int ixp4xx_get_ts_info(struct net_device *dev,
1018 struct ethtool_ts_info *info)
1019{
1020 struct port *port = netdev_priv(dev);
1021
1022 if (port->phc_index < 0)
1023 ixp46x_ptp_find(&port->timesync_regs, &port->phc_index);
1024
1025 info->phc_index = port->phc_index;
1026
1027 if (info->phc_index < 0) {
1028 info->so_timestamping =
1029 SOF_TIMESTAMPING_TX_SOFTWARE |
1030 SOF_TIMESTAMPING_RX_SOFTWARE |
1031 SOF_TIMESTAMPING_SOFTWARE;
1032 return 0;
1033 }
1034 info->so_timestamping =
1035 SOF_TIMESTAMPING_TX_HARDWARE |
1036 SOF_TIMESTAMPING_RX_HARDWARE |
1037 SOF_TIMESTAMPING_RAW_HARDWARE;
1038 info->tx_types =
1039 (1 << HWTSTAMP_TX_OFF) |
1040 (1 << HWTSTAMP_TX_ON);
1041 info->rx_filters =
1042 (1 << HWTSTAMP_FILTER_NONE) |
1043 (1 << HWTSTAMP_FILTER_PTP_V1_L4_SYNC) |
1044 (1 << HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ);
1045 return 0;
1046}
1047
1048static const struct ethtool_ops ixp4xx_ethtool_ops = {
1049 .get_drvinfo = ixp4xx_get_drvinfo,
1050 .nway_reset = phy_ethtool_nway_reset,
1051 .get_link = ethtool_op_get_link,
1052 .get_ts_info = ixp4xx_get_ts_info,
1053 .get_link_ksettings = phy_ethtool_get_link_ksettings,
1054 .set_link_ksettings = phy_ethtool_set_link_ksettings,
1055};
1056
1057
1058static int request_queues(struct port *port)
1059{
1060 int err;
1061
1062 err = qmgr_request_queue(RXFREE_QUEUE(port->id), RX_DESCS, 0, 0,
1063 "%s:RX-free", port->netdev->name);
1064 if (err)
1065 return err;
1066
1067 err = qmgr_request_queue(port->plat->rxq, RX_DESCS, 0, 0,
1068 "%s:RX", port->netdev->name);
1069 if (err)
1070 goto rel_rxfree;
1071
1072 err = qmgr_request_queue(TX_QUEUE(port->id), TX_DESCS, 0, 0,
1073 "%s:TX", port->netdev->name);
1074 if (err)
1075 goto rel_rx;
1076
1077 err = qmgr_request_queue(port->plat->txreadyq, TX_DESCS, 0, 0,
1078 "%s:TX-ready", port->netdev->name);
1079 if (err)
1080 goto rel_tx;
1081
1082 /* TX-done queue handles skbs sent out by the NPEs */
1083 if (!ports_open) {
1084 err = qmgr_request_queue(TXDONE_QUEUE, TXDONE_QUEUE_LEN, 0, 0,
1085 "%s:TX-done", DRV_NAME);
1086 if (err)
1087 goto rel_txready;
1088 }
1089 return 0;
1090
1091rel_txready:
1092 qmgr_release_queue(port->plat->txreadyq);
1093rel_tx:
1094 qmgr_release_queue(TX_QUEUE(port->id));
1095rel_rx:
1096 qmgr_release_queue(port->plat->rxq);
1097rel_rxfree:
1098 qmgr_release_queue(RXFREE_QUEUE(port->id));
1099 printk(KERN_DEBUG "%s: unable to request hardware queues\n",
1100 port->netdev->name);
1101 return err;
1102}
1103
1104static void release_queues(struct port *port)
1105{
1106 qmgr_release_queue(RXFREE_QUEUE(port->id));
1107 qmgr_release_queue(port->plat->rxq);
1108 qmgr_release_queue(TX_QUEUE(port->id));
1109 qmgr_release_queue(port->plat->txreadyq);
1110
1111 if (!ports_open)
1112 qmgr_release_queue(TXDONE_QUEUE);
1113}
1114
1115static int init_queues(struct port *port)
1116{
1117 int i;
1118
1119 if (!ports_open) {
1120 dma_pool = dma_pool_create(DRV_NAME, &port->netdev->dev,
1121 POOL_ALLOC_SIZE, 32, 0);
1122 if (!dma_pool)
1123 return -ENOMEM;
1124 }
1125
1126 port->desc_tab = dma_pool_zalloc(dma_pool, GFP_KERNEL, &port->desc_tab_phys);
1127 if (!port->desc_tab)
1128 return -ENOMEM;
1129 memset(port->rx_buff_tab, 0, sizeof(port->rx_buff_tab)); /* tables */
1130 memset(port->tx_buff_tab, 0, sizeof(port->tx_buff_tab));
1131
1132 /* Setup RX buffers */
1133 for (i = 0; i < RX_DESCS; i++) {
1134 struct desc *desc = rx_desc_ptr(port, i);
1135 buffer_t *buff; /* skb or kmalloc()ated memory */
1136 void *data;
1137#ifdef __ARMEB__
1138 if (!(buff = netdev_alloc_skb(port->netdev, RX_BUFF_SIZE)))
1139 return -ENOMEM;
1140 data = buff->data;
1141#else
1142 if (!(buff = kmalloc(RX_BUFF_SIZE, GFP_KERNEL)))
1143 return -ENOMEM;
1144 data = buff;
1145#endif
1146 desc->buf_len = MAX_MRU;
1147 desc->data = dma_map_single(&port->netdev->dev, data,
1148 RX_BUFF_SIZE, DMA_FROM_DEVICE);
1149 if (dma_mapping_error(&port->netdev->dev, desc->data)) {
1150 free_buffer(buff);
1151 return -EIO;
1152 }
1153 desc->data += NET_IP_ALIGN;
1154 port->rx_buff_tab[i] = buff;
1155 }
1156
1157 return 0;
1158}
1159
1160static void destroy_queues(struct port *port)
1161{
1162 int i;
1163
1164 if (port->desc_tab) {
1165 for (i = 0; i < RX_DESCS; i++) {
1166 struct desc *desc = rx_desc_ptr(port, i);
1167 buffer_t *buff = port->rx_buff_tab[i];
1168 if (buff) {
1169 dma_unmap_single(&port->netdev->dev,
1170 desc->data - NET_IP_ALIGN,
1171 RX_BUFF_SIZE, DMA_FROM_DEVICE);
1172 free_buffer(buff);
1173 }
1174 }
1175 for (i = 0; i < TX_DESCS; i++) {
1176 struct desc *desc = tx_desc_ptr(port, i);
1177 buffer_t *buff = port->tx_buff_tab[i];
1178 if (buff) {
1179 dma_unmap_tx(port, desc);
1180 free_buffer(buff);
1181 }
1182 }
1183 dma_pool_free(dma_pool, port->desc_tab, port->desc_tab_phys);
1184 port->desc_tab = NULL;
1185 }
1186
1187 if (!ports_open && dma_pool) {
1188 dma_pool_destroy(dma_pool);
1189 dma_pool = NULL;
1190 }
1191}
1192
1193static int ixp4xx_do_change_mtu(struct net_device *dev, int new_mtu)
1194{
1195 struct port *port = netdev_priv(dev);
1196 struct npe *npe = port->npe;
1197 int framesize, chunks;
1198 struct msg msg = {};
1199
1200 /* adjust for ethernet headers */
1201 framesize = new_mtu + VLAN_ETH_HLEN;
1202 /* max rx/tx 64 byte chunks */
1203 chunks = DIV_ROUND_UP(framesize, 64);
1204
1205 msg.cmd = NPE_SETMAXFRAMELENGTHS;
1206 msg.eth_id = port->id;
1207
1208 /* Firmware wants to know buffer size in 64 byte chunks */
1209 msg.byte2 = chunks << 8;
1210 msg.byte3 = chunks << 8;
1211
1212 msg.byte4 = msg.byte6 = framesize >> 8;
1213 msg.byte5 = msg.byte7 = framesize & 0xff;
1214
1215 if (npe_send_recv_message(npe, &msg, "ETH_SET_MAX_FRAME_LENGTH"))
1216 return -EIO;
1217 netdev_dbg(dev, "set MTU on NPE %s to %d bytes\n",
1218 npe_name(npe), new_mtu);
1219
1220 return 0;
1221}
1222
1223static int ixp4xx_eth_change_mtu(struct net_device *dev, int new_mtu)
1224{
1225 int ret;
1226
1227 /* MTU can only be changed when the interface is up. We also
1228 * set the MTU from dev->mtu when opening the device.
1229 */
1230 if (dev->flags & IFF_UP) {
1231 ret = ixp4xx_do_change_mtu(dev, new_mtu);
1232 if (ret < 0)
1233 return ret;
1234 }
1235
1236 dev->mtu = new_mtu;
1237
1238 return 0;
1239}
1240
1241static int eth_open(struct net_device *dev)
1242{
1243 struct port *port = netdev_priv(dev);
1244 struct npe *npe = port->npe;
1245 struct msg msg;
1246 int i, err;
1247
1248 if (!npe_running(npe)) {
1249 err = npe_load_firmware(npe, npe_name(npe), &dev->dev);
1250 if (err)
1251 return err;
1252
1253 if (npe_recv_message(npe, &msg, "ETH_GET_STATUS")) {
1254 netdev_err(dev, "%s not responding\n", npe_name(npe));
1255 return -EIO;
1256 }
1257 port->firmware[0] = msg.byte4;
1258 port->firmware[1] = msg.byte5;
1259 port->firmware[2] = msg.byte6;
1260 port->firmware[3] = msg.byte7;
1261 }
1262
1263 memset(&msg, 0, sizeof(msg));
1264 msg.cmd = NPE_VLAN_SETRXQOSENTRY;
1265 msg.eth_id = port->id;
1266 msg.byte5 = port->plat->rxq | 0x80;
1267 msg.byte7 = port->plat->rxq << 4;
1268 for (i = 0; i < 8; i++) {
1269 msg.byte3 = i;
1270 if (npe_send_recv_message(port->npe, &msg, "ETH_SET_RXQ"))
1271 return -EIO;
1272 }
1273
1274 msg.cmd = NPE_EDB_SETPORTADDRESS;
1275 msg.eth_id = PHYSICAL_ID(port->id);
1276 msg.byte2 = dev->dev_addr[0];
1277 msg.byte3 = dev->dev_addr[1];
1278 msg.byte4 = dev->dev_addr[2];
1279 msg.byte5 = dev->dev_addr[3];
1280 msg.byte6 = dev->dev_addr[4];
1281 msg.byte7 = dev->dev_addr[5];
1282 if (npe_send_recv_message(port->npe, &msg, "ETH_SET_MAC"))
1283 return -EIO;
1284
1285 memset(&msg, 0, sizeof(msg));
1286 msg.cmd = NPE_FW_SETFIREWALLMODE;
1287 msg.eth_id = port->id;
1288 if (npe_send_recv_message(port->npe, &msg, "ETH_SET_FIREWALL_MODE"))
1289 return -EIO;
1290
1291 ixp4xx_do_change_mtu(dev, dev->mtu);
1292
1293 if ((err = request_queues(port)) != 0)
1294 return err;
1295
1296 if ((err = init_queues(port)) != 0) {
1297 destroy_queues(port);
1298 release_queues(port);
1299 return err;
1300 }
1301
1302 port->speed = 0; /* force "link up" message */
1303 phy_start(dev->phydev);
1304
1305 for (i = 0; i < ETH_ALEN; i++)
1306 __raw_writel(dev->dev_addr[i], &port->regs->hw_addr[i]);
1307 __raw_writel(0x08, &port->regs->random_seed);
1308 __raw_writel(0x12, &port->regs->partial_empty_threshold);
1309 __raw_writel(0x30, &port->regs->partial_full_threshold);
1310 __raw_writel(0x08, &port->regs->tx_start_bytes);
1311 __raw_writel(0x15, &port->regs->tx_deferral);
1312 __raw_writel(0x08, &port->regs->tx_2part_deferral[0]);
1313 __raw_writel(0x07, &port->regs->tx_2part_deferral[1]);
1314 __raw_writel(0x80, &port->regs->slot_time);
1315 __raw_writel(0x01, &port->regs->int_clock_threshold);
1316
1317 /* Populate queues with buffers, no failure after this point */
1318 for (i = 0; i < TX_DESCS; i++)
1319 queue_put_desc(port->plat->txreadyq,
1320 tx_desc_phys(port, i), tx_desc_ptr(port, i));
1321
1322 for (i = 0; i < RX_DESCS; i++)
1323 queue_put_desc(RXFREE_QUEUE(port->id),
1324 rx_desc_phys(port, i), rx_desc_ptr(port, i));
1325
1326 __raw_writel(TX_CNTRL1_RETRIES, &port->regs->tx_control[1]);
1327 __raw_writel(DEFAULT_TX_CNTRL0, &port->regs->tx_control[0]);
1328 __raw_writel(0, &port->regs->rx_control[1]);
1329 __raw_writel(DEFAULT_RX_CNTRL0, &port->regs->rx_control[0]);
1330
1331 napi_enable(&port->napi);
1332 eth_set_mcast_list(dev);
1333 netif_start_queue(dev);
1334
1335 qmgr_set_irq(port->plat->rxq, QUEUE_IRQ_SRC_NOT_EMPTY,
1336 eth_rx_irq, dev);
1337 if (!ports_open) {
1338 qmgr_set_irq(TXDONE_QUEUE, QUEUE_IRQ_SRC_NOT_EMPTY,
1339 eth_txdone_irq, NULL);
1340 qmgr_enable_irq(TXDONE_QUEUE);
1341 }
1342 ports_open++;
1343 /* we may already have RX data, enables IRQ */
1344 napi_schedule(&port->napi);
1345 return 0;
1346}
1347
1348static int eth_close(struct net_device *dev)
1349{
1350 struct port *port = netdev_priv(dev);
1351 struct msg msg;
1352 int buffs = RX_DESCS; /* allocated RX buffers */
1353 int i;
1354
1355 ports_open--;
1356 qmgr_disable_irq(port->plat->rxq);
1357 napi_disable(&port->napi);
1358 netif_stop_queue(dev);
1359
1360 while (queue_get_desc(RXFREE_QUEUE(port->id), port, 0) >= 0)
1361 buffs--;
1362
1363 memset(&msg, 0, sizeof(msg));
1364 msg.cmd = NPE_SETLOOPBACK_MODE;
1365 msg.eth_id = port->id;
1366 msg.byte3 = 1;
1367 if (npe_send_recv_message(port->npe, &msg, "ETH_ENABLE_LOOPBACK"))
1368 netdev_crit(dev, "unable to enable loopback\n");
1369
1370 i = 0;
1371 do { /* drain RX buffers */
1372 while (queue_get_desc(port->plat->rxq, port, 0) >= 0)
1373 buffs--;
1374 if (!buffs)
1375 break;
1376 if (qmgr_stat_empty(TX_QUEUE(port->id))) {
1377 /* we have to inject some packet */
1378 struct desc *desc;
1379 u32 phys;
1380 int n = queue_get_desc(port->plat->txreadyq, port, 1);
1381 BUG_ON(n < 0);
1382 desc = tx_desc_ptr(port, n);
1383 phys = tx_desc_phys(port, n);
1384 desc->buf_len = desc->pkt_len = 1;
1385 wmb();
1386 queue_put_desc(TX_QUEUE(port->id), phys, desc);
1387 }
1388 udelay(1);
1389 } while (++i < MAX_CLOSE_WAIT);
1390
1391 if (buffs)
1392 netdev_crit(dev, "unable to drain RX queue, %i buffer(s)"
1393 " left in NPE\n", buffs);
1394#if DEBUG_CLOSE
1395 if (!buffs)
1396 netdev_debug(dev, "draining RX queue took %i cycles\n", i);
1397#endif
1398
1399 buffs = TX_DESCS;
1400 while (queue_get_desc(TX_QUEUE(port->id), port, 1) >= 0)
1401 buffs--; /* cancel TX */
1402
1403 i = 0;
1404 do {
1405 while (queue_get_desc(port->plat->txreadyq, port, 1) >= 0)
1406 buffs--;
1407 if (!buffs)
1408 break;
1409 } while (++i < MAX_CLOSE_WAIT);
1410
1411 if (buffs)
1412 netdev_crit(dev, "unable to drain TX queue, %i buffer(s) "
1413 "left in NPE\n", buffs);
1414#if DEBUG_CLOSE
1415 if (!buffs)
1416 netdev_debug(dev, "draining TX queues took %i cycles\n", i);
1417#endif
1418
1419 msg.byte3 = 0;
1420 if (npe_send_recv_message(port->npe, &msg, "ETH_DISABLE_LOOPBACK"))
1421 netdev_crit(dev, "unable to disable loopback\n");
1422
1423 phy_stop(dev->phydev);
1424
1425 if (!ports_open)
1426 qmgr_disable_irq(TXDONE_QUEUE);
1427 destroy_queues(port);
1428 release_queues(port);
1429 return 0;
1430}
1431
1432static const struct net_device_ops ixp4xx_netdev_ops = {
1433 .ndo_open = eth_open,
1434 .ndo_stop = eth_close,
1435 .ndo_change_mtu = ixp4xx_eth_change_mtu,
1436 .ndo_start_xmit = eth_xmit,
1437 .ndo_set_rx_mode = eth_set_mcast_list,
1438 .ndo_eth_ioctl = eth_ioctl,
1439 .ndo_set_mac_address = eth_mac_addr,
1440 .ndo_validate_addr = eth_validate_addr,
1441};
1442
1443static struct eth_plat_info *ixp4xx_of_get_platdata(struct device *dev)
1444{
1445 struct device_node *np = dev->of_node;
1446 struct of_phandle_args queue_spec;
1447 struct of_phandle_args npe_spec;
1448 struct device_node *mdio_np;
1449 struct eth_plat_info *plat;
1450 u8 mac[ETH_ALEN];
1451 int ret;
1452
1453 plat = devm_kzalloc(dev, sizeof(*plat), GFP_KERNEL);
1454 if (!plat)
1455 return NULL;
1456
1457 ret = of_parse_phandle_with_fixed_args(np, "intel,npe-handle", 1, 0,
1458 &npe_spec);
1459 if (ret) {
1460 dev_err(dev, "no NPE engine specified\n");
1461 return NULL;
1462 }
1463 /* NPE ID 0x00, 0x10, 0x20... */
1464 plat->npe = (npe_spec.args[0] << 4);
1465
1466 /* Check if this device has an MDIO bus */
1467 mdio_np = of_get_child_by_name(np, "mdio");
1468 if (mdio_np) {
1469 plat->has_mdio = true;
1470 mdio_bus_np = mdio_np;
1471 /* DO NOT put the mdio_np, it will be used */
1472 }
1473
1474 /* Get the rx queue as a resource from queue manager */
1475 ret = of_parse_phandle_with_fixed_args(np, "queue-rx", 1, 0,
1476 &queue_spec);
1477 if (ret) {
1478 dev_err(dev, "no rx queue phandle\n");
1479 return NULL;
1480 }
1481 plat->rxq = queue_spec.args[0];
1482
1483 /* Get the txready queue as resource from queue manager */
1484 ret = of_parse_phandle_with_fixed_args(np, "queue-txready", 1, 0,
1485 &queue_spec);
1486 if (ret) {
1487 dev_err(dev, "no txready queue phandle\n");
1488 return NULL;
1489 }
1490 plat->txreadyq = queue_spec.args[0];
1491
1492 ret = of_get_mac_address(np, mac);
1493 if (!ret) {
1494 dev_info(dev, "Setting macaddr from DT %pM\n", mac);
1495 memcpy(plat->hwaddr, mac, ETH_ALEN);
1496 }
1497
1498 return plat;
1499}
1500
1501static int ixp4xx_eth_probe(struct platform_device *pdev)
1502{
1503 struct phy_device *phydev = NULL;
1504 struct device *dev = &pdev->dev;
1505 struct device_node *np = dev->of_node;
1506 struct eth_plat_info *plat;
1507 struct net_device *ndev;
1508 struct port *port;
1509 int err;
1510
1511 plat = ixp4xx_of_get_platdata(dev);
1512 if (!plat)
1513 return -ENODEV;
1514
1515 if (!(ndev = devm_alloc_etherdev(dev, sizeof(struct port))))
1516 return -ENOMEM;
1517
1518 SET_NETDEV_DEV(ndev, dev);
1519 port = netdev_priv(ndev);
1520 port->netdev = ndev;
1521 port->id = plat->npe;
1522 port->phc_index = -1;
1523
1524 /* Get the port resource and remap */
1525 port->regs = devm_platform_get_and_ioremap_resource(pdev, 0, NULL);
1526 if (IS_ERR(port->regs))
1527 return PTR_ERR(port->regs);
1528
1529 /* Register the MDIO bus if we have it */
1530 if (plat->has_mdio) {
1531 err = ixp4xx_mdio_register(port->regs);
1532 if (err) {
1533 dev_err(dev, "failed to register MDIO bus\n");
1534 return err;
1535 }
1536 }
1537 /* If the instance with the MDIO bus has not yet appeared,
1538 * defer probing until it gets probed.
1539 */
1540 if (!mdio_bus)
1541 return -EPROBE_DEFER;
1542
1543 ndev->netdev_ops = &ixp4xx_netdev_ops;
1544 ndev->ethtool_ops = &ixp4xx_ethtool_ops;
1545 ndev->tx_queue_len = 100;
1546 /* Inherit the DMA masks from the platform device */
1547 ndev->dev.dma_mask = dev->dma_mask;
1548 ndev->dev.coherent_dma_mask = dev->coherent_dma_mask;
1549
1550 ndev->min_mtu = ETH_MIN_MTU;
1551 ndev->max_mtu = MAX_MRU;
1552
1553 netif_napi_add_weight(ndev, &port->napi, eth_poll, NAPI_WEIGHT);
1554
1555 if (!(port->npe = npe_request(NPE_ID(port->id))))
1556 return -EIO;
1557
1558 port->plat = plat;
1559 npe_port_tab[NPE_ID(port->id)] = port;
1560 if (is_valid_ether_addr(plat->hwaddr))
1561 eth_hw_addr_set(ndev, plat->hwaddr);
1562 else
1563 eth_hw_addr_random(ndev);
1564
1565 platform_set_drvdata(pdev, ndev);
1566
1567 __raw_writel(DEFAULT_CORE_CNTRL | CORE_RESET,
1568 &port->regs->core_control);
1569 udelay(50);
1570 __raw_writel(DEFAULT_CORE_CNTRL, &port->regs->core_control);
1571 udelay(50);
1572
1573 phydev = of_phy_get_and_connect(ndev, np, ixp4xx_adjust_link);
1574 if (!phydev) {
1575 err = -ENODEV;
1576 dev_err(dev, "no phydev\n");
1577 goto err_free_mem;
1578 }
1579
1580 phydev->irq = PHY_POLL;
1581
1582 if ((err = register_netdev(ndev)))
1583 goto err_phy_dis;
1584
1585 netdev_info(ndev, "%s: MII PHY %s on %s\n", ndev->name, phydev_name(phydev),
1586 npe_name(port->npe));
1587
1588 return 0;
1589
1590err_phy_dis:
1591 phy_disconnect(phydev);
1592err_free_mem:
1593 npe_port_tab[NPE_ID(port->id)] = NULL;
1594 npe_release(port->npe);
1595 return err;
1596}
1597
1598static void ixp4xx_eth_remove(struct platform_device *pdev)
1599{
1600 struct net_device *ndev = platform_get_drvdata(pdev);
1601 struct phy_device *phydev = ndev->phydev;
1602 struct port *port = netdev_priv(ndev);
1603
1604 unregister_netdev(ndev);
1605 phy_disconnect(phydev);
1606 ixp4xx_mdio_remove();
1607 npe_port_tab[NPE_ID(port->id)] = NULL;
1608 npe_release(port->npe);
1609}
1610
1611static const struct of_device_id ixp4xx_eth_of_match[] = {
1612 {
1613 .compatible = "intel,ixp4xx-ethernet",
1614 },
1615 { },
1616};
1617
1618static struct platform_driver ixp4xx_eth_driver = {
1619 .driver = {
1620 .name = DRV_NAME,
1621 .of_match_table = of_match_ptr(ixp4xx_eth_of_match),
1622 },
1623 .probe = ixp4xx_eth_probe,
1624 .remove_new = ixp4xx_eth_remove,
1625};
1626module_platform_driver(ixp4xx_eth_driver);
1627
1628MODULE_AUTHOR("Krzysztof Halasa");
1629MODULE_DESCRIPTION("Intel IXP4xx Ethernet driver");
1630MODULE_LICENSE("GPL v2");
1631MODULE_ALIAS("platform:ixp4xx_eth");
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Intel IXP4xx Ethernet driver for Linux
4 *
5 * Copyright (C) 2007 Krzysztof Halasa <khc@pm.waw.pl>
6 *
7 * Ethernet port config (0x00 is not present on IXP42X):
8 *
9 * logical port 0x00 0x10 0x20
10 * NPE 0 (NPE-A) 1 (NPE-B) 2 (NPE-C)
11 * physical PortId 2 0 1
12 * TX queue 23 24 25
13 * RX-free queue 26 27 28
14 * TX-done queue is always 31, per-port RX and TX-ready queues are configurable
15 *
16 * Queue entries:
17 * bits 0 -> 1 - NPE ID (RX and TX-done)
18 * bits 0 -> 2 - priority (TX, per 802.1D)
19 * bits 3 -> 4 - port ID (user-set?)
20 * bits 5 -> 31 - physical descriptor address
21 */
22
23#include <linux/delay.h>
24#include <linux/dma-mapping.h>
25#include <linux/dmapool.h>
26#include <linux/etherdevice.h>
27#include <linux/io.h>
28#include <linux/kernel.h>
29#include <linux/net_tstamp.h>
30#include <linux/of.h>
31#include <linux/of_mdio.h>
32#include <linux/phy.h>
33#include <linux/platform_data/eth_ixp4xx.h>
34#include <linux/platform_device.h>
35#include <linux/ptp_classify.h>
36#include <linux/slab.h>
37#include <linux/module.h>
38#include <linux/soc/ixp4xx/npe.h>
39#include <linux/soc/ixp4xx/qmgr.h>
40#include <mach/hardware.h>
41#include <linux/soc/ixp4xx/cpu.h>
42
43#include "ixp46x_ts.h"
44
45#define DEBUG_DESC 0
46#define DEBUG_RX 0
47#define DEBUG_TX 0
48#define DEBUG_PKT_BYTES 0
49#define DEBUG_MDIO 0
50#define DEBUG_CLOSE 0
51
52#define DRV_NAME "ixp4xx_eth"
53
54#define MAX_NPES 3
55
56#define RX_DESCS 64 /* also length of all RX queues */
57#define TX_DESCS 16 /* also length of all TX queues */
58#define TXDONE_QUEUE_LEN 64 /* dwords */
59
60#define POOL_ALLOC_SIZE (sizeof(struct desc) * (RX_DESCS + TX_DESCS))
61#define REGS_SIZE 0x1000
62#define MAX_MRU 1536 /* 0x600 */
63#define RX_BUFF_SIZE ALIGN((NET_IP_ALIGN) + MAX_MRU, 4)
64
65#define NAPI_WEIGHT 16
66#define MDIO_INTERVAL (3 * HZ)
67#define MAX_MDIO_RETRIES 100 /* microseconds, typically 30 cycles */
68#define MAX_CLOSE_WAIT 1000 /* microseconds, typically 2-3 cycles */
69
70#define NPE_ID(port_id) ((port_id) >> 4)
71#define PHYSICAL_ID(port_id) ((NPE_ID(port_id) + 2) % 3)
72#define TX_QUEUE(port_id) (NPE_ID(port_id) + 23)
73#define RXFREE_QUEUE(port_id) (NPE_ID(port_id) + 26)
74#define TXDONE_QUEUE 31
75
76#define PTP_SLAVE_MODE 1
77#define PTP_MASTER_MODE 2
78#define PORT2CHANNEL(p) NPE_ID(p->id)
79
80/* TX Control Registers */
81#define TX_CNTRL0_TX_EN 0x01
82#define TX_CNTRL0_HALFDUPLEX 0x02
83#define TX_CNTRL0_RETRY 0x04
84#define TX_CNTRL0_PAD_EN 0x08
85#define TX_CNTRL0_APPEND_FCS 0x10
86#define TX_CNTRL0_2DEFER 0x20
87#define TX_CNTRL0_RMII 0x40 /* reduced MII */
88#define TX_CNTRL1_RETRIES 0x0F /* 4 bits */
89
90/* RX Control Registers */
91#define RX_CNTRL0_RX_EN 0x01
92#define RX_CNTRL0_PADSTRIP_EN 0x02
93#define RX_CNTRL0_SEND_FCS 0x04
94#define RX_CNTRL0_PAUSE_EN 0x08
95#define RX_CNTRL0_LOOP_EN 0x10
96#define RX_CNTRL0_ADDR_FLTR_EN 0x20
97#define RX_CNTRL0_RX_RUNT_EN 0x40
98#define RX_CNTRL0_BCAST_DIS 0x80
99#define RX_CNTRL1_DEFER_EN 0x01
100
101/* Core Control Register */
102#define CORE_RESET 0x01
103#define CORE_RX_FIFO_FLUSH 0x02
104#define CORE_TX_FIFO_FLUSH 0x04
105#define CORE_SEND_JAM 0x08
106#define CORE_MDC_EN 0x10 /* MDIO using NPE-B ETH-0 only */
107
108#define DEFAULT_TX_CNTRL0 (TX_CNTRL0_TX_EN | TX_CNTRL0_RETRY | \
109 TX_CNTRL0_PAD_EN | TX_CNTRL0_APPEND_FCS | \
110 TX_CNTRL0_2DEFER)
111#define DEFAULT_RX_CNTRL0 RX_CNTRL0_RX_EN
112#define DEFAULT_CORE_CNTRL CORE_MDC_EN
113
114
115/* NPE message codes */
116#define NPE_GETSTATUS 0x00
117#define NPE_EDB_SETPORTADDRESS 0x01
118#define NPE_EDB_GETMACADDRESSDATABASE 0x02
119#define NPE_EDB_SETMACADDRESSSDATABASE 0x03
120#define NPE_GETSTATS 0x04
121#define NPE_RESETSTATS 0x05
122#define NPE_SETMAXFRAMELENGTHS 0x06
123#define NPE_VLAN_SETRXTAGMODE 0x07
124#define NPE_VLAN_SETDEFAULTRXVID 0x08
125#define NPE_VLAN_SETPORTVLANTABLEENTRY 0x09
126#define NPE_VLAN_SETPORTVLANTABLERANGE 0x0A
127#define NPE_VLAN_SETRXQOSENTRY 0x0B
128#define NPE_VLAN_SETPORTIDEXTRACTIONMODE 0x0C
129#define NPE_STP_SETBLOCKINGSTATE 0x0D
130#define NPE_FW_SETFIREWALLMODE 0x0E
131#define NPE_PC_SETFRAMECONTROLDURATIONID 0x0F
132#define NPE_PC_SETAPMACTABLE 0x11
133#define NPE_SETLOOPBACK_MODE 0x12
134#define NPE_PC_SETBSSIDTABLE 0x13
135#define NPE_ADDRESS_FILTER_CONFIG 0x14
136#define NPE_APPENDFCSCONFIG 0x15
137#define NPE_NOTIFY_MAC_RECOVERY_DONE 0x16
138#define NPE_MAC_RECOVERY_START 0x17
139
140
141#ifdef __ARMEB__
142typedef struct sk_buff buffer_t;
143#define free_buffer dev_kfree_skb
144#define free_buffer_irq dev_consume_skb_irq
145#else
146typedef void buffer_t;
147#define free_buffer kfree
148#define free_buffer_irq kfree
149#endif
150
151struct eth_regs {
152 u32 tx_control[2], __res1[2]; /* 000 */
153 u32 rx_control[2], __res2[2]; /* 010 */
154 u32 random_seed, __res3[3]; /* 020 */
155 u32 partial_empty_threshold, __res4; /* 030 */
156 u32 partial_full_threshold, __res5; /* 038 */
157 u32 tx_start_bytes, __res6[3]; /* 040 */
158 u32 tx_deferral, rx_deferral, __res7[2];/* 050 */
159 u32 tx_2part_deferral[2], __res8[2]; /* 060 */
160 u32 slot_time, __res9[3]; /* 070 */
161 u32 mdio_command[4]; /* 080 */
162 u32 mdio_status[4]; /* 090 */
163 u32 mcast_mask[6], __res10[2]; /* 0A0 */
164 u32 mcast_addr[6], __res11[2]; /* 0C0 */
165 u32 int_clock_threshold, __res12[3]; /* 0E0 */
166 u32 hw_addr[6], __res13[61]; /* 0F0 */
167 u32 core_control; /* 1FC */
168};
169
170struct port {
171 struct eth_regs __iomem *regs;
172 struct npe *npe;
173 struct net_device *netdev;
174 struct napi_struct napi;
175 struct eth_plat_info *plat;
176 buffer_t *rx_buff_tab[RX_DESCS], *tx_buff_tab[TX_DESCS];
177 struct desc *desc_tab; /* coherent */
178 u32 desc_tab_phys;
179 int id; /* logical port ID */
180 int speed, duplex;
181 u8 firmware[4];
182 int hwts_tx_en;
183 int hwts_rx_en;
184};
185
186/* NPE message structure */
187struct msg {
188#ifdef __ARMEB__
189 u8 cmd, eth_id, byte2, byte3;
190 u8 byte4, byte5, byte6, byte7;
191#else
192 u8 byte3, byte2, eth_id, cmd;
193 u8 byte7, byte6, byte5, byte4;
194#endif
195};
196
197/* Ethernet packet descriptor */
198struct desc {
199 u32 next; /* pointer to next buffer, unused */
200
201#ifdef __ARMEB__
202 u16 buf_len; /* buffer length */
203 u16 pkt_len; /* packet length */
204 u32 data; /* pointer to data buffer in RAM */
205 u8 dest_id;
206 u8 src_id;
207 u16 flags;
208 u8 qos;
209 u8 padlen;
210 u16 vlan_tci;
211#else
212 u16 pkt_len; /* packet length */
213 u16 buf_len; /* buffer length */
214 u32 data; /* pointer to data buffer in RAM */
215 u16 flags;
216 u8 src_id;
217 u8 dest_id;
218 u16 vlan_tci;
219 u8 padlen;
220 u8 qos;
221#endif
222
223#ifdef __ARMEB__
224 u8 dst_mac_0, dst_mac_1, dst_mac_2, dst_mac_3;
225 u8 dst_mac_4, dst_mac_5, src_mac_0, src_mac_1;
226 u8 src_mac_2, src_mac_3, src_mac_4, src_mac_5;
227#else
228 u8 dst_mac_3, dst_mac_2, dst_mac_1, dst_mac_0;
229 u8 src_mac_1, src_mac_0, dst_mac_5, dst_mac_4;
230 u8 src_mac_5, src_mac_4, src_mac_3, src_mac_2;
231#endif
232};
233
234
235#define rx_desc_phys(port, n) ((port)->desc_tab_phys + \
236 (n) * sizeof(struct desc))
237#define rx_desc_ptr(port, n) (&(port)->desc_tab[n])
238
239#define tx_desc_phys(port, n) ((port)->desc_tab_phys + \
240 ((n) + RX_DESCS) * sizeof(struct desc))
241#define tx_desc_ptr(port, n) (&(port)->desc_tab[(n) + RX_DESCS])
242
243#ifndef __ARMEB__
244static inline void memcpy_swab32(u32 *dest, u32 *src, int cnt)
245{
246 int i;
247 for (i = 0; i < cnt; i++)
248 dest[i] = swab32(src[i]);
249}
250#endif
251
252static DEFINE_SPINLOCK(mdio_lock);
253static struct eth_regs __iomem *mdio_regs; /* mdio command and status only */
254static struct mii_bus *mdio_bus;
255static struct device_node *mdio_bus_np;
256static int ports_open;
257static struct port *npe_port_tab[MAX_NPES];
258static struct dma_pool *dma_pool;
259
260static int ixp_ptp_match(struct sk_buff *skb, u16 uid_hi, u32 uid_lo, u16 seqid)
261{
262 u8 *data = skb->data;
263 unsigned int offset;
264 u16 *hi, *id;
265 u32 lo;
266
267 if (ptp_classify_raw(skb) != PTP_CLASS_V1_IPV4)
268 return 0;
269
270 offset = ETH_HLEN + IPV4_HLEN(data) + UDP_HLEN;
271
272 if (skb->len < offset + OFF_PTP_SEQUENCE_ID + sizeof(seqid))
273 return 0;
274
275 hi = (u16 *)(data + offset + OFF_PTP_SOURCE_UUID);
276 id = (u16 *)(data + offset + OFF_PTP_SEQUENCE_ID);
277
278 memcpy(&lo, &hi[1], sizeof(lo));
279
280 return (uid_hi == ntohs(*hi) &&
281 uid_lo == ntohl(lo) &&
282 seqid == ntohs(*id));
283}
284
285static void ixp_rx_timestamp(struct port *port, struct sk_buff *skb)
286{
287 struct skb_shared_hwtstamps *shhwtstamps;
288 struct ixp46x_ts_regs *regs;
289 u64 ns;
290 u32 ch, hi, lo, val;
291 u16 uid, seq;
292
293 if (!port->hwts_rx_en)
294 return;
295
296 ch = PORT2CHANNEL(port);
297
298 regs = (struct ixp46x_ts_regs __iomem *) IXP4XX_TIMESYNC_BASE_VIRT;
299
300 val = __raw_readl(®s->channel[ch].ch_event);
301
302 if (!(val & RX_SNAPSHOT_LOCKED))
303 return;
304
305 lo = __raw_readl(®s->channel[ch].src_uuid_lo);
306 hi = __raw_readl(®s->channel[ch].src_uuid_hi);
307
308 uid = hi & 0xffff;
309 seq = (hi >> 16) & 0xffff;
310
311 if (!ixp_ptp_match(skb, htons(uid), htonl(lo), htons(seq)))
312 goto out;
313
314 lo = __raw_readl(®s->channel[ch].rx_snap_lo);
315 hi = __raw_readl(®s->channel[ch].rx_snap_hi);
316 ns = ((u64) hi) << 32;
317 ns |= lo;
318 ns <<= TICKS_NS_SHIFT;
319
320 shhwtstamps = skb_hwtstamps(skb);
321 memset(shhwtstamps, 0, sizeof(*shhwtstamps));
322 shhwtstamps->hwtstamp = ns_to_ktime(ns);
323out:
324 __raw_writel(RX_SNAPSHOT_LOCKED, ®s->channel[ch].ch_event);
325}
326
327static void ixp_tx_timestamp(struct port *port, struct sk_buff *skb)
328{
329 struct skb_shared_hwtstamps shhwtstamps;
330 struct ixp46x_ts_regs *regs;
331 struct skb_shared_info *shtx;
332 u64 ns;
333 u32 ch, cnt, hi, lo, val;
334
335 shtx = skb_shinfo(skb);
336 if (unlikely(shtx->tx_flags & SKBTX_HW_TSTAMP && port->hwts_tx_en))
337 shtx->tx_flags |= SKBTX_IN_PROGRESS;
338 else
339 return;
340
341 ch = PORT2CHANNEL(port);
342
343 regs = (struct ixp46x_ts_regs __iomem *) IXP4XX_TIMESYNC_BASE_VIRT;
344
345 /*
346 * This really stinks, but we have to poll for the Tx time stamp.
347 * Usually, the time stamp is ready after 4 to 6 microseconds.
348 */
349 for (cnt = 0; cnt < 100; cnt++) {
350 val = __raw_readl(®s->channel[ch].ch_event);
351 if (val & TX_SNAPSHOT_LOCKED)
352 break;
353 udelay(1);
354 }
355 if (!(val & TX_SNAPSHOT_LOCKED)) {
356 shtx->tx_flags &= ~SKBTX_IN_PROGRESS;
357 return;
358 }
359
360 lo = __raw_readl(®s->channel[ch].tx_snap_lo);
361 hi = __raw_readl(®s->channel[ch].tx_snap_hi);
362 ns = ((u64) hi) << 32;
363 ns |= lo;
364 ns <<= TICKS_NS_SHIFT;
365
366 memset(&shhwtstamps, 0, sizeof(shhwtstamps));
367 shhwtstamps.hwtstamp = ns_to_ktime(ns);
368 skb_tstamp_tx(skb, &shhwtstamps);
369
370 __raw_writel(TX_SNAPSHOT_LOCKED, ®s->channel[ch].ch_event);
371}
372
373static int hwtstamp_set(struct net_device *netdev, struct ifreq *ifr)
374{
375 struct hwtstamp_config cfg;
376 struct ixp46x_ts_regs *regs;
377 struct port *port = netdev_priv(netdev);
378 int ch;
379
380 if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg)))
381 return -EFAULT;
382
383 if (cfg.flags) /* reserved for future extensions */
384 return -EINVAL;
385
386 ch = PORT2CHANNEL(port);
387 regs = (struct ixp46x_ts_regs __iomem *) IXP4XX_TIMESYNC_BASE_VIRT;
388
389 if (cfg.tx_type != HWTSTAMP_TX_OFF && cfg.tx_type != HWTSTAMP_TX_ON)
390 return -ERANGE;
391
392 switch (cfg.rx_filter) {
393 case HWTSTAMP_FILTER_NONE:
394 port->hwts_rx_en = 0;
395 break;
396 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
397 port->hwts_rx_en = PTP_SLAVE_MODE;
398 __raw_writel(0, ®s->channel[ch].ch_control);
399 break;
400 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
401 port->hwts_rx_en = PTP_MASTER_MODE;
402 __raw_writel(MASTER_MODE, ®s->channel[ch].ch_control);
403 break;
404 default:
405 return -ERANGE;
406 }
407
408 port->hwts_tx_en = cfg.tx_type == HWTSTAMP_TX_ON;
409
410 /* Clear out any old time stamps. */
411 __raw_writel(TX_SNAPSHOT_LOCKED | RX_SNAPSHOT_LOCKED,
412 ®s->channel[ch].ch_event);
413
414 return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;
415}
416
417static int hwtstamp_get(struct net_device *netdev, struct ifreq *ifr)
418{
419 struct hwtstamp_config cfg;
420 struct port *port = netdev_priv(netdev);
421
422 cfg.flags = 0;
423 cfg.tx_type = port->hwts_tx_en ? HWTSTAMP_TX_ON : HWTSTAMP_TX_OFF;
424
425 switch (port->hwts_rx_en) {
426 case 0:
427 cfg.rx_filter = HWTSTAMP_FILTER_NONE;
428 break;
429 case PTP_SLAVE_MODE:
430 cfg.rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_SYNC;
431 break;
432 case PTP_MASTER_MODE:
433 cfg.rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ;
434 break;
435 default:
436 WARN_ON_ONCE(1);
437 return -ERANGE;
438 }
439
440 return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;
441}
442
443static int ixp4xx_mdio_cmd(struct mii_bus *bus, int phy_id, int location,
444 int write, u16 cmd)
445{
446 int cycles = 0;
447
448 if (__raw_readl(&mdio_regs->mdio_command[3]) & 0x80) {
449 printk(KERN_ERR "%s: MII not ready to transmit\n", bus->name);
450 return -1;
451 }
452
453 if (write) {
454 __raw_writel(cmd & 0xFF, &mdio_regs->mdio_command[0]);
455 __raw_writel(cmd >> 8, &mdio_regs->mdio_command[1]);
456 }
457 __raw_writel(((phy_id << 5) | location) & 0xFF,
458 &mdio_regs->mdio_command[2]);
459 __raw_writel((phy_id >> 3) | (write << 2) | 0x80 /* GO */,
460 &mdio_regs->mdio_command[3]);
461
462 while ((cycles < MAX_MDIO_RETRIES) &&
463 (__raw_readl(&mdio_regs->mdio_command[3]) & 0x80)) {
464 udelay(1);
465 cycles++;
466 }
467
468 if (cycles == MAX_MDIO_RETRIES) {
469 printk(KERN_ERR "%s #%i: MII write failed\n", bus->name,
470 phy_id);
471 return -1;
472 }
473
474#if DEBUG_MDIO
475 printk(KERN_DEBUG "%s #%i: mdio_%s() took %i cycles\n", bus->name,
476 phy_id, write ? "write" : "read", cycles);
477#endif
478
479 if (write)
480 return 0;
481
482 if (__raw_readl(&mdio_regs->mdio_status[3]) & 0x80) {
483#if DEBUG_MDIO
484 printk(KERN_DEBUG "%s #%i: MII read failed\n", bus->name,
485 phy_id);
486#endif
487 return 0xFFFF; /* don't return error */
488 }
489
490 return (__raw_readl(&mdio_regs->mdio_status[0]) & 0xFF) |
491 ((__raw_readl(&mdio_regs->mdio_status[1]) & 0xFF) << 8);
492}
493
494static int ixp4xx_mdio_read(struct mii_bus *bus, int phy_id, int location)
495{
496 unsigned long flags;
497 int ret;
498
499 spin_lock_irqsave(&mdio_lock, flags);
500 ret = ixp4xx_mdio_cmd(bus, phy_id, location, 0, 0);
501 spin_unlock_irqrestore(&mdio_lock, flags);
502#if DEBUG_MDIO
503 printk(KERN_DEBUG "%s #%i: MII read [%i] -> 0x%X\n", bus->name,
504 phy_id, location, ret);
505#endif
506 return ret;
507}
508
509static int ixp4xx_mdio_write(struct mii_bus *bus, int phy_id, int location,
510 u16 val)
511{
512 unsigned long flags;
513 int ret;
514
515 spin_lock_irqsave(&mdio_lock, flags);
516 ret = ixp4xx_mdio_cmd(bus, phy_id, location, 1, val);
517 spin_unlock_irqrestore(&mdio_lock, flags);
518#if DEBUG_MDIO
519 printk(KERN_DEBUG "%s #%i: MII write [%i] <- 0x%X, err = %i\n",
520 bus->name, phy_id, location, val, ret);
521#endif
522 return ret;
523}
524
525static int ixp4xx_mdio_register(struct eth_regs __iomem *regs)
526{
527 int err;
528
529 if (!(mdio_bus = mdiobus_alloc()))
530 return -ENOMEM;
531
532 mdio_regs = regs;
533 __raw_writel(DEFAULT_CORE_CNTRL, &mdio_regs->core_control);
534 mdio_bus->name = "IXP4xx MII Bus";
535 mdio_bus->read = &ixp4xx_mdio_read;
536 mdio_bus->write = &ixp4xx_mdio_write;
537 snprintf(mdio_bus->id, MII_BUS_ID_SIZE, "ixp4xx-eth-0");
538
539 err = of_mdiobus_register(mdio_bus, mdio_bus_np);
540 if (err)
541 mdiobus_free(mdio_bus);
542 return err;
543}
544
545static void ixp4xx_mdio_remove(void)
546{
547 mdiobus_unregister(mdio_bus);
548 mdiobus_free(mdio_bus);
549}
550
551
552static void ixp4xx_adjust_link(struct net_device *dev)
553{
554 struct port *port = netdev_priv(dev);
555 struct phy_device *phydev = dev->phydev;
556
557 if (!phydev->link) {
558 if (port->speed) {
559 port->speed = 0;
560 printk(KERN_INFO "%s: link down\n", dev->name);
561 }
562 return;
563 }
564
565 if (port->speed == phydev->speed && port->duplex == phydev->duplex)
566 return;
567
568 port->speed = phydev->speed;
569 port->duplex = phydev->duplex;
570
571 if (port->duplex)
572 __raw_writel(DEFAULT_TX_CNTRL0 & ~TX_CNTRL0_HALFDUPLEX,
573 &port->regs->tx_control[0]);
574 else
575 __raw_writel(DEFAULT_TX_CNTRL0 | TX_CNTRL0_HALFDUPLEX,
576 &port->regs->tx_control[0]);
577
578 netdev_info(dev, "%s: link up, speed %u Mb/s, %s duplex\n",
579 dev->name, port->speed, port->duplex ? "full" : "half");
580}
581
582
583static inline void debug_pkt(struct net_device *dev, const char *func,
584 u8 *data, int len)
585{
586#if DEBUG_PKT_BYTES
587 int i;
588
589 netdev_debug(dev, "%s(%i) ", func, len);
590 for (i = 0; i < len; i++) {
591 if (i >= DEBUG_PKT_BYTES)
592 break;
593 printk("%s%02X",
594 ((i == 6) || (i == 12) || (i >= 14)) ? " " : "",
595 data[i]);
596 }
597 printk("\n");
598#endif
599}
600
601
602static inline void debug_desc(u32 phys, struct desc *desc)
603{
604#if DEBUG_DESC
605 printk(KERN_DEBUG "%X: %X %3X %3X %08X %2X < %2X %4X %X"
606 " %X %X %02X%02X%02X%02X%02X%02X < %02X%02X%02X%02X%02X%02X\n",
607 phys, desc->next, desc->buf_len, desc->pkt_len,
608 desc->data, desc->dest_id, desc->src_id, desc->flags,
609 desc->qos, desc->padlen, desc->vlan_tci,
610 desc->dst_mac_0, desc->dst_mac_1, desc->dst_mac_2,
611 desc->dst_mac_3, desc->dst_mac_4, desc->dst_mac_5,
612 desc->src_mac_0, desc->src_mac_1, desc->src_mac_2,
613 desc->src_mac_3, desc->src_mac_4, desc->src_mac_5);
614#endif
615}
616
617static inline int queue_get_desc(unsigned int queue, struct port *port,
618 int is_tx)
619{
620 u32 phys, tab_phys, n_desc;
621 struct desc *tab;
622
623 if (!(phys = qmgr_get_entry(queue)))
624 return -1;
625
626 phys &= ~0x1F; /* mask out non-address bits */
627 tab_phys = is_tx ? tx_desc_phys(port, 0) : rx_desc_phys(port, 0);
628 tab = is_tx ? tx_desc_ptr(port, 0) : rx_desc_ptr(port, 0);
629 n_desc = (phys - tab_phys) / sizeof(struct desc);
630 BUG_ON(n_desc >= (is_tx ? TX_DESCS : RX_DESCS));
631 debug_desc(phys, &tab[n_desc]);
632 BUG_ON(tab[n_desc].next);
633 return n_desc;
634}
635
636static inline void queue_put_desc(unsigned int queue, u32 phys,
637 struct desc *desc)
638{
639 debug_desc(phys, desc);
640 BUG_ON(phys & 0x1F);
641 qmgr_put_entry(queue, phys);
642 /* Don't check for queue overflow here, we've allocated sufficient
643 length and queues >= 32 don't support this check anyway. */
644}
645
646
647static inline void dma_unmap_tx(struct port *port, struct desc *desc)
648{
649#ifdef __ARMEB__
650 dma_unmap_single(&port->netdev->dev, desc->data,
651 desc->buf_len, DMA_TO_DEVICE);
652#else
653 dma_unmap_single(&port->netdev->dev, desc->data & ~3,
654 ALIGN((desc->data & 3) + desc->buf_len, 4),
655 DMA_TO_DEVICE);
656#endif
657}
658
659
660static void eth_rx_irq(void *pdev)
661{
662 struct net_device *dev = pdev;
663 struct port *port = netdev_priv(dev);
664
665#if DEBUG_RX
666 printk(KERN_DEBUG "%s: eth_rx_irq\n", dev->name);
667#endif
668 qmgr_disable_irq(port->plat->rxq);
669 napi_schedule(&port->napi);
670}
671
672static int eth_poll(struct napi_struct *napi, int budget)
673{
674 struct port *port = container_of(napi, struct port, napi);
675 struct net_device *dev = port->netdev;
676 unsigned int rxq = port->plat->rxq, rxfreeq = RXFREE_QUEUE(port->id);
677 int received = 0;
678
679#if DEBUG_RX
680 netdev_debug(dev, "eth_poll\n");
681#endif
682
683 while (received < budget) {
684 struct sk_buff *skb;
685 struct desc *desc;
686 int n;
687#ifdef __ARMEB__
688 struct sk_buff *temp;
689 u32 phys;
690#endif
691
692 if ((n = queue_get_desc(rxq, port, 0)) < 0) {
693#if DEBUG_RX
694 netdev_debug(dev, "eth_poll napi_complete\n");
695#endif
696 napi_complete(napi);
697 qmgr_enable_irq(rxq);
698 if (!qmgr_stat_below_low_watermark(rxq) &&
699 napi_reschedule(napi)) { /* not empty again */
700#if DEBUG_RX
701 netdev_debug(dev, "eth_poll napi_reschedule succeeded\n");
702#endif
703 qmgr_disable_irq(rxq);
704 continue;
705 }
706#if DEBUG_RX
707 netdev_debug(dev, "eth_poll all done\n");
708#endif
709 return received; /* all work done */
710 }
711
712 desc = rx_desc_ptr(port, n);
713
714#ifdef __ARMEB__
715 if ((skb = netdev_alloc_skb(dev, RX_BUFF_SIZE))) {
716 phys = dma_map_single(&dev->dev, skb->data,
717 RX_BUFF_SIZE, DMA_FROM_DEVICE);
718 if (dma_mapping_error(&dev->dev, phys)) {
719 dev_kfree_skb(skb);
720 skb = NULL;
721 }
722 }
723#else
724 skb = netdev_alloc_skb(dev,
725 ALIGN(NET_IP_ALIGN + desc->pkt_len, 4));
726#endif
727
728 if (!skb) {
729 dev->stats.rx_dropped++;
730 /* put the desc back on RX-ready queue */
731 desc->buf_len = MAX_MRU;
732 desc->pkt_len = 0;
733 queue_put_desc(rxfreeq, rx_desc_phys(port, n), desc);
734 continue;
735 }
736
737 /* process received frame */
738#ifdef __ARMEB__
739 temp = skb;
740 skb = port->rx_buff_tab[n];
741 dma_unmap_single(&dev->dev, desc->data - NET_IP_ALIGN,
742 RX_BUFF_SIZE, DMA_FROM_DEVICE);
743#else
744 dma_sync_single_for_cpu(&dev->dev, desc->data - NET_IP_ALIGN,
745 RX_BUFF_SIZE, DMA_FROM_DEVICE);
746 memcpy_swab32((u32 *)skb->data, (u32 *)port->rx_buff_tab[n],
747 ALIGN(NET_IP_ALIGN + desc->pkt_len, 4) / 4);
748#endif
749 skb_reserve(skb, NET_IP_ALIGN);
750 skb_put(skb, desc->pkt_len);
751
752 debug_pkt(dev, "eth_poll", skb->data, skb->len);
753
754 ixp_rx_timestamp(port, skb);
755 skb->protocol = eth_type_trans(skb, dev);
756 dev->stats.rx_packets++;
757 dev->stats.rx_bytes += skb->len;
758 netif_receive_skb(skb);
759
760 /* put the new buffer on RX-free queue */
761#ifdef __ARMEB__
762 port->rx_buff_tab[n] = temp;
763 desc->data = phys + NET_IP_ALIGN;
764#endif
765 desc->buf_len = MAX_MRU;
766 desc->pkt_len = 0;
767 queue_put_desc(rxfreeq, rx_desc_phys(port, n), desc);
768 received++;
769 }
770
771#if DEBUG_RX
772 netdev_debug(dev, "eth_poll(): end, not all work done\n");
773#endif
774 return received; /* not all work done */
775}
776
777
778static void eth_txdone_irq(void *unused)
779{
780 u32 phys;
781
782#if DEBUG_TX
783 printk(KERN_DEBUG DRV_NAME ": eth_txdone_irq\n");
784#endif
785 while ((phys = qmgr_get_entry(TXDONE_QUEUE)) != 0) {
786 u32 npe_id, n_desc;
787 struct port *port;
788 struct desc *desc;
789 int start;
790
791 npe_id = phys & 3;
792 BUG_ON(npe_id >= MAX_NPES);
793 port = npe_port_tab[npe_id];
794 BUG_ON(!port);
795 phys &= ~0x1F; /* mask out non-address bits */
796 n_desc = (phys - tx_desc_phys(port, 0)) / sizeof(struct desc);
797 BUG_ON(n_desc >= TX_DESCS);
798 desc = tx_desc_ptr(port, n_desc);
799 debug_desc(phys, desc);
800
801 if (port->tx_buff_tab[n_desc]) { /* not the draining packet */
802 port->netdev->stats.tx_packets++;
803 port->netdev->stats.tx_bytes += desc->pkt_len;
804
805 dma_unmap_tx(port, desc);
806#if DEBUG_TX
807 printk(KERN_DEBUG "%s: eth_txdone_irq free %p\n",
808 port->netdev->name, port->tx_buff_tab[n_desc]);
809#endif
810 free_buffer_irq(port->tx_buff_tab[n_desc]);
811 port->tx_buff_tab[n_desc] = NULL;
812 }
813
814 start = qmgr_stat_below_low_watermark(port->plat->txreadyq);
815 queue_put_desc(port->plat->txreadyq, phys, desc);
816 if (start) { /* TX-ready queue was empty */
817#if DEBUG_TX
818 printk(KERN_DEBUG "%s: eth_txdone_irq xmit ready\n",
819 port->netdev->name);
820#endif
821 netif_wake_queue(port->netdev);
822 }
823 }
824}
825
826static int eth_xmit(struct sk_buff *skb, struct net_device *dev)
827{
828 struct port *port = netdev_priv(dev);
829 unsigned int txreadyq = port->plat->txreadyq;
830 int len, offset, bytes, n;
831 void *mem;
832 u32 phys;
833 struct desc *desc;
834
835#if DEBUG_TX
836 netdev_debug(dev, "eth_xmit\n");
837#endif
838
839 if (unlikely(skb->len > MAX_MRU)) {
840 dev_kfree_skb(skb);
841 dev->stats.tx_errors++;
842 return NETDEV_TX_OK;
843 }
844
845 debug_pkt(dev, "eth_xmit", skb->data, skb->len);
846
847 len = skb->len;
848#ifdef __ARMEB__
849 offset = 0; /* no need to keep alignment */
850 bytes = len;
851 mem = skb->data;
852#else
853 offset = (int)skb->data & 3; /* keep 32-bit alignment */
854 bytes = ALIGN(offset + len, 4);
855 if (!(mem = kmalloc(bytes, GFP_ATOMIC))) {
856 dev_kfree_skb(skb);
857 dev->stats.tx_dropped++;
858 return NETDEV_TX_OK;
859 }
860 memcpy_swab32(mem, (u32 *)((int)skb->data & ~3), bytes / 4);
861#endif
862
863 phys = dma_map_single(&dev->dev, mem, bytes, DMA_TO_DEVICE);
864 if (dma_mapping_error(&dev->dev, phys)) {
865 dev_kfree_skb(skb);
866#ifndef __ARMEB__
867 kfree(mem);
868#endif
869 dev->stats.tx_dropped++;
870 return NETDEV_TX_OK;
871 }
872
873 n = queue_get_desc(txreadyq, port, 1);
874 BUG_ON(n < 0);
875 desc = tx_desc_ptr(port, n);
876
877#ifdef __ARMEB__
878 port->tx_buff_tab[n] = skb;
879#else
880 port->tx_buff_tab[n] = mem;
881#endif
882 desc->data = phys + offset;
883 desc->buf_len = desc->pkt_len = len;
884
885 /* NPE firmware pads short frames with zeros internally */
886 wmb();
887 queue_put_desc(TX_QUEUE(port->id), tx_desc_phys(port, n), desc);
888
889 if (qmgr_stat_below_low_watermark(txreadyq)) { /* empty */
890#if DEBUG_TX
891 netdev_debug(dev, "eth_xmit queue full\n");
892#endif
893 netif_stop_queue(dev);
894 /* we could miss TX ready interrupt */
895 /* really empty in fact */
896 if (!qmgr_stat_below_low_watermark(txreadyq)) {
897#if DEBUG_TX
898 netdev_debug(dev, "eth_xmit ready again\n");
899#endif
900 netif_wake_queue(dev);
901 }
902 }
903
904#if DEBUG_TX
905 netdev_debug(dev, "eth_xmit end\n");
906#endif
907
908 ixp_tx_timestamp(port, skb);
909 skb_tx_timestamp(skb);
910
911#ifndef __ARMEB__
912 dev_kfree_skb(skb);
913#endif
914 return NETDEV_TX_OK;
915}
916
917
918static void eth_set_mcast_list(struct net_device *dev)
919{
920 struct port *port = netdev_priv(dev);
921 struct netdev_hw_addr *ha;
922 u8 diffs[ETH_ALEN], *addr;
923 int i;
924 static const u8 allmulti[] = { 0x01, 0x00, 0x00, 0x00, 0x00, 0x00 };
925
926 if ((dev->flags & IFF_ALLMULTI) && !(dev->flags & IFF_PROMISC)) {
927 for (i = 0; i < ETH_ALEN; i++) {
928 __raw_writel(allmulti[i], &port->regs->mcast_addr[i]);
929 __raw_writel(allmulti[i], &port->regs->mcast_mask[i]);
930 }
931 __raw_writel(DEFAULT_RX_CNTRL0 | RX_CNTRL0_ADDR_FLTR_EN,
932 &port->regs->rx_control[0]);
933 return;
934 }
935
936 if ((dev->flags & IFF_PROMISC) || netdev_mc_empty(dev)) {
937 __raw_writel(DEFAULT_RX_CNTRL0 & ~RX_CNTRL0_ADDR_FLTR_EN,
938 &port->regs->rx_control[0]);
939 return;
940 }
941
942 eth_zero_addr(diffs);
943
944 addr = NULL;
945 netdev_for_each_mc_addr(ha, dev) {
946 if (!addr)
947 addr = ha->addr; /* first MAC address */
948 for (i = 0; i < ETH_ALEN; i++)
949 diffs[i] |= addr[i] ^ ha->addr[i];
950 }
951
952 for (i = 0; i < ETH_ALEN; i++) {
953 __raw_writel(addr[i], &port->regs->mcast_addr[i]);
954 __raw_writel(~diffs[i], &port->regs->mcast_mask[i]);
955 }
956
957 __raw_writel(DEFAULT_RX_CNTRL0 | RX_CNTRL0_ADDR_FLTR_EN,
958 &port->regs->rx_control[0]);
959}
960
961
962static int eth_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
963{
964 if (!netif_running(dev))
965 return -EINVAL;
966
967 if (cpu_is_ixp46x()) {
968 if (cmd == SIOCSHWTSTAMP)
969 return hwtstamp_set(dev, req);
970 if (cmd == SIOCGHWTSTAMP)
971 return hwtstamp_get(dev, req);
972 }
973
974 return phy_mii_ioctl(dev->phydev, req, cmd);
975}
976
977/* ethtool support */
978
979static void ixp4xx_get_drvinfo(struct net_device *dev,
980 struct ethtool_drvinfo *info)
981{
982 struct port *port = netdev_priv(dev);
983
984 strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
985 snprintf(info->fw_version, sizeof(info->fw_version), "%u:%u:%u:%u",
986 port->firmware[0], port->firmware[1],
987 port->firmware[2], port->firmware[3]);
988 strlcpy(info->bus_info, "internal", sizeof(info->bus_info));
989}
990
991int ixp46x_phc_index = -1;
992EXPORT_SYMBOL_GPL(ixp46x_phc_index);
993
994static int ixp4xx_get_ts_info(struct net_device *dev,
995 struct ethtool_ts_info *info)
996{
997 if (!cpu_is_ixp46x()) {
998 info->so_timestamping =
999 SOF_TIMESTAMPING_TX_SOFTWARE |
1000 SOF_TIMESTAMPING_RX_SOFTWARE |
1001 SOF_TIMESTAMPING_SOFTWARE;
1002 info->phc_index = -1;
1003 return 0;
1004 }
1005 info->so_timestamping =
1006 SOF_TIMESTAMPING_TX_HARDWARE |
1007 SOF_TIMESTAMPING_RX_HARDWARE |
1008 SOF_TIMESTAMPING_RAW_HARDWARE;
1009 info->phc_index = ixp46x_phc_index;
1010 info->tx_types =
1011 (1 << HWTSTAMP_TX_OFF) |
1012 (1 << HWTSTAMP_TX_ON);
1013 info->rx_filters =
1014 (1 << HWTSTAMP_FILTER_NONE) |
1015 (1 << HWTSTAMP_FILTER_PTP_V1_L4_SYNC) |
1016 (1 << HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ);
1017 return 0;
1018}
1019
1020static const struct ethtool_ops ixp4xx_ethtool_ops = {
1021 .get_drvinfo = ixp4xx_get_drvinfo,
1022 .nway_reset = phy_ethtool_nway_reset,
1023 .get_link = ethtool_op_get_link,
1024 .get_ts_info = ixp4xx_get_ts_info,
1025 .get_link_ksettings = phy_ethtool_get_link_ksettings,
1026 .set_link_ksettings = phy_ethtool_set_link_ksettings,
1027};
1028
1029
1030static int request_queues(struct port *port)
1031{
1032 int err;
1033
1034 err = qmgr_request_queue(RXFREE_QUEUE(port->id), RX_DESCS, 0, 0,
1035 "%s:RX-free", port->netdev->name);
1036 if (err)
1037 return err;
1038
1039 err = qmgr_request_queue(port->plat->rxq, RX_DESCS, 0, 0,
1040 "%s:RX", port->netdev->name);
1041 if (err)
1042 goto rel_rxfree;
1043
1044 err = qmgr_request_queue(TX_QUEUE(port->id), TX_DESCS, 0, 0,
1045 "%s:TX", port->netdev->name);
1046 if (err)
1047 goto rel_rx;
1048
1049 err = qmgr_request_queue(port->plat->txreadyq, TX_DESCS, 0, 0,
1050 "%s:TX-ready", port->netdev->name);
1051 if (err)
1052 goto rel_tx;
1053
1054 /* TX-done queue handles skbs sent out by the NPEs */
1055 if (!ports_open) {
1056 err = qmgr_request_queue(TXDONE_QUEUE, TXDONE_QUEUE_LEN, 0, 0,
1057 "%s:TX-done", DRV_NAME);
1058 if (err)
1059 goto rel_txready;
1060 }
1061 return 0;
1062
1063rel_txready:
1064 qmgr_release_queue(port->plat->txreadyq);
1065rel_tx:
1066 qmgr_release_queue(TX_QUEUE(port->id));
1067rel_rx:
1068 qmgr_release_queue(port->plat->rxq);
1069rel_rxfree:
1070 qmgr_release_queue(RXFREE_QUEUE(port->id));
1071 printk(KERN_DEBUG "%s: unable to request hardware queues\n",
1072 port->netdev->name);
1073 return err;
1074}
1075
1076static void release_queues(struct port *port)
1077{
1078 qmgr_release_queue(RXFREE_QUEUE(port->id));
1079 qmgr_release_queue(port->plat->rxq);
1080 qmgr_release_queue(TX_QUEUE(port->id));
1081 qmgr_release_queue(port->plat->txreadyq);
1082
1083 if (!ports_open)
1084 qmgr_release_queue(TXDONE_QUEUE);
1085}
1086
1087static int init_queues(struct port *port)
1088{
1089 int i;
1090
1091 if (!ports_open) {
1092 dma_pool = dma_pool_create(DRV_NAME, &port->netdev->dev,
1093 POOL_ALLOC_SIZE, 32, 0);
1094 if (!dma_pool)
1095 return -ENOMEM;
1096 }
1097
1098 if (!(port->desc_tab = dma_pool_alloc(dma_pool, GFP_KERNEL,
1099 &port->desc_tab_phys)))
1100 return -ENOMEM;
1101 memset(port->desc_tab, 0, POOL_ALLOC_SIZE);
1102 memset(port->rx_buff_tab, 0, sizeof(port->rx_buff_tab)); /* tables */
1103 memset(port->tx_buff_tab, 0, sizeof(port->tx_buff_tab));
1104
1105 /* Setup RX buffers */
1106 for (i = 0; i < RX_DESCS; i++) {
1107 struct desc *desc = rx_desc_ptr(port, i);
1108 buffer_t *buff; /* skb or kmalloc()ated memory */
1109 void *data;
1110#ifdef __ARMEB__
1111 if (!(buff = netdev_alloc_skb(port->netdev, RX_BUFF_SIZE)))
1112 return -ENOMEM;
1113 data = buff->data;
1114#else
1115 if (!(buff = kmalloc(RX_BUFF_SIZE, GFP_KERNEL)))
1116 return -ENOMEM;
1117 data = buff;
1118#endif
1119 desc->buf_len = MAX_MRU;
1120 desc->data = dma_map_single(&port->netdev->dev, data,
1121 RX_BUFF_SIZE, DMA_FROM_DEVICE);
1122 if (dma_mapping_error(&port->netdev->dev, desc->data)) {
1123 free_buffer(buff);
1124 return -EIO;
1125 }
1126 desc->data += NET_IP_ALIGN;
1127 port->rx_buff_tab[i] = buff;
1128 }
1129
1130 return 0;
1131}
1132
1133static void destroy_queues(struct port *port)
1134{
1135 int i;
1136
1137 if (port->desc_tab) {
1138 for (i = 0; i < RX_DESCS; i++) {
1139 struct desc *desc = rx_desc_ptr(port, i);
1140 buffer_t *buff = port->rx_buff_tab[i];
1141 if (buff) {
1142 dma_unmap_single(&port->netdev->dev,
1143 desc->data - NET_IP_ALIGN,
1144 RX_BUFF_SIZE, DMA_FROM_DEVICE);
1145 free_buffer(buff);
1146 }
1147 }
1148 for (i = 0; i < TX_DESCS; i++) {
1149 struct desc *desc = tx_desc_ptr(port, i);
1150 buffer_t *buff = port->tx_buff_tab[i];
1151 if (buff) {
1152 dma_unmap_tx(port, desc);
1153 free_buffer(buff);
1154 }
1155 }
1156 dma_pool_free(dma_pool, port->desc_tab, port->desc_tab_phys);
1157 port->desc_tab = NULL;
1158 }
1159
1160 if (!ports_open && dma_pool) {
1161 dma_pool_destroy(dma_pool);
1162 dma_pool = NULL;
1163 }
1164}
1165
1166static int eth_open(struct net_device *dev)
1167{
1168 struct port *port = netdev_priv(dev);
1169 struct npe *npe = port->npe;
1170 struct msg msg;
1171 int i, err;
1172
1173 if (!npe_running(npe)) {
1174 err = npe_load_firmware(npe, npe_name(npe), &dev->dev);
1175 if (err)
1176 return err;
1177
1178 if (npe_recv_message(npe, &msg, "ETH_GET_STATUS")) {
1179 netdev_err(dev, "%s not responding\n", npe_name(npe));
1180 return -EIO;
1181 }
1182 port->firmware[0] = msg.byte4;
1183 port->firmware[1] = msg.byte5;
1184 port->firmware[2] = msg.byte6;
1185 port->firmware[3] = msg.byte7;
1186 }
1187
1188 memset(&msg, 0, sizeof(msg));
1189 msg.cmd = NPE_VLAN_SETRXQOSENTRY;
1190 msg.eth_id = port->id;
1191 msg.byte5 = port->plat->rxq | 0x80;
1192 msg.byte7 = port->plat->rxq << 4;
1193 for (i = 0; i < 8; i++) {
1194 msg.byte3 = i;
1195 if (npe_send_recv_message(port->npe, &msg, "ETH_SET_RXQ"))
1196 return -EIO;
1197 }
1198
1199 msg.cmd = NPE_EDB_SETPORTADDRESS;
1200 msg.eth_id = PHYSICAL_ID(port->id);
1201 msg.byte2 = dev->dev_addr[0];
1202 msg.byte3 = dev->dev_addr[1];
1203 msg.byte4 = dev->dev_addr[2];
1204 msg.byte5 = dev->dev_addr[3];
1205 msg.byte6 = dev->dev_addr[4];
1206 msg.byte7 = dev->dev_addr[5];
1207 if (npe_send_recv_message(port->npe, &msg, "ETH_SET_MAC"))
1208 return -EIO;
1209
1210 memset(&msg, 0, sizeof(msg));
1211 msg.cmd = NPE_FW_SETFIREWALLMODE;
1212 msg.eth_id = port->id;
1213 if (npe_send_recv_message(port->npe, &msg, "ETH_SET_FIREWALL_MODE"))
1214 return -EIO;
1215
1216 if ((err = request_queues(port)) != 0)
1217 return err;
1218
1219 if ((err = init_queues(port)) != 0) {
1220 destroy_queues(port);
1221 release_queues(port);
1222 return err;
1223 }
1224
1225 port->speed = 0; /* force "link up" message */
1226 phy_start(dev->phydev);
1227
1228 for (i = 0; i < ETH_ALEN; i++)
1229 __raw_writel(dev->dev_addr[i], &port->regs->hw_addr[i]);
1230 __raw_writel(0x08, &port->regs->random_seed);
1231 __raw_writel(0x12, &port->regs->partial_empty_threshold);
1232 __raw_writel(0x30, &port->regs->partial_full_threshold);
1233 __raw_writel(0x08, &port->regs->tx_start_bytes);
1234 __raw_writel(0x15, &port->regs->tx_deferral);
1235 __raw_writel(0x08, &port->regs->tx_2part_deferral[0]);
1236 __raw_writel(0x07, &port->regs->tx_2part_deferral[1]);
1237 __raw_writel(0x80, &port->regs->slot_time);
1238 __raw_writel(0x01, &port->regs->int_clock_threshold);
1239
1240 /* Populate queues with buffers, no failure after this point */
1241 for (i = 0; i < TX_DESCS; i++)
1242 queue_put_desc(port->plat->txreadyq,
1243 tx_desc_phys(port, i), tx_desc_ptr(port, i));
1244
1245 for (i = 0; i < RX_DESCS; i++)
1246 queue_put_desc(RXFREE_QUEUE(port->id),
1247 rx_desc_phys(port, i), rx_desc_ptr(port, i));
1248
1249 __raw_writel(TX_CNTRL1_RETRIES, &port->regs->tx_control[1]);
1250 __raw_writel(DEFAULT_TX_CNTRL0, &port->regs->tx_control[0]);
1251 __raw_writel(0, &port->regs->rx_control[1]);
1252 __raw_writel(DEFAULT_RX_CNTRL0, &port->regs->rx_control[0]);
1253
1254 napi_enable(&port->napi);
1255 eth_set_mcast_list(dev);
1256 netif_start_queue(dev);
1257
1258 qmgr_set_irq(port->plat->rxq, QUEUE_IRQ_SRC_NOT_EMPTY,
1259 eth_rx_irq, dev);
1260 if (!ports_open) {
1261 qmgr_set_irq(TXDONE_QUEUE, QUEUE_IRQ_SRC_NOT_EMPTY,
1262 eth_txdone_irq, NULL);
1263 qmgr_enable_irq(TXDONE_QUEUE);
1264 }
1265 ports_open++;
1266 /* we may already have RX data, enables IRQ */
1267 napi_schedule(&port->napi);
1268 return 0;
1269}
1270
1271static int eth_close(struct net_device *dev)
1272{
1273 struct port *port = netdev_priv(dev);
1274 struct msg msg;
1275 int buffs = RX_DESCS; /* allocated RX buffers */
1276 int i;
1277
1278 ports_open--;
1279 qmgr_disable_irq(port->plat->rxq);
1280 napi_disable(&port->napi);
1281 netif_stop_queue(dev);
1282
1283 while (queue_get_desc(RXFREE_QUEUE(port->id), port, 0) >= 0)
1284 buffs--;
1285
1286 memset(&msg, 0, sizeof(msg));
1287 msg.cmd = NPE_SETLOOPBACK_MODE;
1288 msg.eth_id = port->id;
1289 msg.byte3 = 1;
1290 if (npe_send_recv_message(port->npe, &msg, "ETH_ENABLE_LOOPBACK"))
1291 netdev_crit(dev, "unable to enable loopback\n");
1292
1293 i = 0;
1294 do { /* drain RX buffers */
1295 while (queue_get_desc(port->plat->rxq, port, 0) >= 0)
1296 buffs--;
1297 if (!buffs)
1298 break;
1299 if (qmgr_stat_empty(TX_QUEUE(port->id))) {
1300 /* we have to inject some packet */
1301 struct desc *desc;
1302 u32 phys;
1303 int n = queue_get_desc(port->plat->txreadyq, port, 1);
1304 BUG_ON(n < 0);
1305 desc = tx_desc_ptr(port, n);
1306 phys = tx_desc_phys(port, n);
1307 desc->buf_len = desc->pkt_len = 1;
1308 wmb();
1309 queue_put_desc(TX_QUEUE(port->id), phys, desc);
1310 }
1311 udelay(1);
1312 } while (++i < MAX_CLOSE_WAIT);
1313
1314 if (buffs)
1315 netdev_crit(dev, "unable to drain RX queue, %i buffer(s)"
1316 " left in NPE\n", buffs);
1317#if DEBUG_CLOSE
1318 if (!buffs)
1319 netdev_debug(dev, "draining RX queue took %i cycles\n", i);
1320#endif
1321
1322 buffs = TX_DESCS;
1323 while (queue_get_desc(TX_QUEUE(port->id), port, 1) >= 0)
1324 buffs--; /* cancel TX */
1325
1326 i = 0;
1327 do {
1328 while (queue_get_desc(port->plat->txreadyq, port, 1) >= 0)
1329 buffs--;
1330 if (!buffs)
1331 break;
1332 } while (++i < MAX_CLOSE_WAIT);
1333
1334 if (buffs)
1335 netdev_crit(dev, "unable to drain TX queue, %i buffer(s) "
1336 "left in NPE\n", buffs);
1337#if DEBUG_CLOSE
1338 if (!buffs)
1339 netdev_debug(dev, "draining TX queues took %i cycles\n", i);
1340#endif
1341
1342 msg.byte3 = 0;
1343 if (npe_send_recv_message(port->npe, &msg, "ETH_DISABLE_LOOPBACK"))
1344 netdev_crit(dev, "unable to disable loopback\n");
1345
1346 phy_stop(dev->phydev);
1347
1348 if (!ports_open)
1349 qmgr_disable_irq(TXDONE_QUEUE);
1350 destroy_queues(port);
1351 release_queues(port);
1352 return 0;
1353}
1354
1355static const struct net_device_ops ixp4xx_netdev_ops = {
1356 .ndo_open = eth_open,
1357 .ndo_stop = eth_close,
1358 .ndo_start_xmit = eth_xmit,
1359 .ndo_set_rx_mode = eth_set_mcast_list,
1360 .ndo_do_ioctl = eth_ioctl,
1361 .ndo_set_mac_address = eth_mac_addr,
1362 .ndo_validate_addr = eth_validate_addr,
1363};
1364
1365#ifdef CONFIG_OF
1366static struct eth_plat_info *ixp4xx_of_get_platdata(struct device *dev)
1367{
1368 struct device_node *np = dev->of_node;
1369 struct of_phandle_args queue_spec;
1370 struct of_phandle_args npe_spec;
1371 struct device_node *mdio_np;
1372 struct eth_plat_info *plat;
1373 int ret;
1374
1375 plat = devm_kzalloc(dev, sizeof(*plat), GFP_KERNEL);
1376 if (!plat)
1377 return NULL;
1378
1379 ret = of_parse_phandle_with_fixed_args(np, "intel,npe-handle", 1, 0,
1380 &npe_spec);
1381 if (ret) {
1382 dev_err(dev, "no NPE engine specified\n");
1383 return NULL;
1384 }
1385 /* NPE ID 0x00, 0x10, 0x20... */
1386 plat->npe = (npe_spec.args[0] << 4);
1387
1388 /* Check if this device has an MDIO bus */
1389 mdio_np = of_get_child_by_name(np, "mdio");
1390 if (mdio_np) {
1391 plat->has_mdio = true;
1392 mdio_bus_np = mdio_np;
1393 /* DO NOT put the mdio_np, it will be used */
1394 }
1395
1396 /* Get the rx queue as a resource from queue manager */
1397 ret = of_parse_phandle_with_fixed_args(np, "queue-rx", 1, 0,
1398 &queue_spec);
1399 if (ret) {
1400 dev_err(dev, "no rx queue phandle\n");
1401 return NULL;
1402 }
1403 plat->rxq = queue_spec.args[0];
1404
1405 /* Get the txready queue as resource from queue manager */
1406 ret = of_parse_phandle_with_fixed_args(np, "queue-txready", 1, 0,
1407 &queue_spec);
1408 if (ret) {
1409 dev_err(dev, "no txready queue phandle\n");
1410 return NULL;
1411 }
1412 plat->txreadyq = queue_spec.args[0];
1413
1414 return plat;
1415}
1416#else
1417static struct eth_plat_info *ixp4xx_of_get_platdata(struct device *dev)
1418{
1419 return NULL;
1420}
1421#endif
1422
1423static int ixp4xx_eth_probe(struct platform_device *pdev)
1424{
1425 struct phy_device *phydev = NULL;
1426 struct device *dev = &pdev->dev;
1427 struct device_node *np = dev->of_node;
1428 struct eth_plat_info *plat;
1429 struct net_device *ndev;
1430 struct port *port;
1431 int err;
1432
1433 if (np) {
1434 plat = ixp4xx_of_get_platdata(dev);
1435 if (!plat)
1436 return -ENODEV;
1437 } else {
1438 plat = dev_get_platdata(dev);
1439 if (!plat)
1440 return -ENODEV;
1441 plat->npe = pdev->id;
1442 switch (plat->npe) {
1443 case IXP4XX_ETH_NPEA:
1444 /* If the MDIO bus is not up yet, defer probe */
1445 break;
1446 case IXP4XX_ETH_NPEB:
1447 /* On all except IXP43x, NPE-B is used for the MDIO bus.
1448 * If there is no NPE-B in the feature set, bail out,
1449 * else we have the MDIO bus here.
1450 */
1451 if (!cpu_is_ixp43x()) {
1452 if (!(ixp4xx_read_feature_bits() &
1453 IXP4XX_FEATURE_NPEB_ETH0))
1454 return -ENODEV;
1455 /* Else register the MDIO bus on NPE-B */
1456 plat->has_mdio = true;
1457 }
1458 break;
1459 case IXP4XX_ETH_NPEC:
1460 /* IXP43x lacks NPE-B and uses NPE-C for the MDIO bus
1461 * access, if there is no NPE-C, no bus, nothing works,
1462 * so bail out.
1463 */
1464 if (cpu_is_ixp43x()) {
1465 if (!(ixp4xx_read_feature_bits() &
1466 IXP4XX_FEATURE_NPEC_ETH))
1467 return -ENODEV;
1468 /* Else register the MDIO bus on NPE-B */
1469 plat->has_mdio = true;
1470 }
1471 break;
1472 default:
1473 return -ENODEV;
1474 }
1475 }
1476
1477 if (!(ndev = devm_alloc_etherdev(dev, sizeof(struct port))))
1478 return -ENOMEM;
1479
1480 SET_NETDEV_DEV(ndev, dev);
1481 port = netdev_priv(ndev);
1482 port->netdev = ndev;
1483 port->id = plat->npe;
1484
1485 /* Get the port resource and remap */
1486 port->regs = devm_platform_get_and_ioremap_resource(pdev, 0, NULL);
1487 if (IS_ERR(port->regs))
1488 return PTR_ERR(port->regs);
1489
1490 /* Register the MDIO bus if we have it */
1491 if (plat->has_mdio) {
1492 err = ixp4xx_mdio_register(port->regs);
1493 if (err) {
1494 dev_err(dev, "failed to register MDIO bus\n");
1495 return err;
1496 }
1497 }
1498 /* If the instance with the MDIO bus has not yet appeared,
1499 * defer probing until it gets probed.
1500 */
1501 if (!mdio_bus)
1502 return -EPROBE_DEFER;
1503
1504 ndev->netdev_ops = &ixp4xx_netdev_ops;
1505 ndev->ethtool_ops = &ixp4xx_ethtool_ops;
1506 ndev->tx_queue_len = 100;
1507 /* Inherit the DMA masks from the platform device */
1508 ndev->dev.dma_mask = dev->dma_mask;
1509 ndev->dev.coherent_dma_mask = dev->coherent_dma_mask;
1510
1511 netif_napi_add(ndev, &port->napi, eth_poll, NAPI_WEIGHT);
1512
1513 if (!(port->npe = npe_request(NPE_ID(port->id))))
1514 return -EIO;
1515
1516 port->plat = plat;
1517 npe_port_tab[NPE_ID(port->id)] = port;
1518 memcpy(ndev->dev_addr, plat->hwaddr, ETH_ALEN);
1519
1520 platform_set_drvdata(pdev, ndev);
1521
1522 __raw_writel(DEFAULT_CORE_CNTRL | CORE_RESET,
1523 &port->regs->core_control);
1524 udelay(50);
1525 __raw_writel(DEFAULT_CORE_CNTRL, &port->regs->core_control);
1526 udelay(50);
1527
1528 if (np) {
1529 phydev = of_phy_get_and_connect(ndev, np, ixp4xx_adjust_link);
1530 } else {
1531 phydev = mdiobus_get_phy(mdio_bus, plat->phy);
1532 if (!phydev) {
1533 err = -ENODEV;
1534 dev_err(dev, "could not connect phydev (%d)\n", err);
1535 goto err_free_mem;
1536 }
1537 err = phy_connect_direct(ndev, phydev, ixp4xx_adjust_link,
1538 PHY_INTERFACE_MODE_MII);
1539 if (err)
1540 goto err_free_mem;
1541
1542 }
1543 if (!phydev) {
1544 err = -ENODEV;
1545 dev_err(dev, "no phydev\n");
1546 goto err_free_mem;
1547 }
1548
1549 phydev->irq = PHY_POLL;
1550
1551 if ((err = register_netdev(ndev)))
1552 goto err_phy_dis;
1553
1554 netdev_info(ndev, "%s: MII PHY %i on %s\n", ndev->name, plat->phy,
1555 npe_name(port->npe));
1556
1557 return 0;
1558
1559err_phy_dis:
1560 phy_disconnect(phydev);
1561err_free_mem:
1562 npe_port_tab[NPE_ID(port->id)] = NULL;
1563 npe_release(port->npe);
1564 return err;
1565}
1566
1567static int ixp4xx_eth_remove(struct platform_device *pdev)
1568{
1569 struct net_device *ndev = platform_get_drvdata(pdev);
1570 struct phy_device *phydev = ndev->phydev;
1571 struct port *port = netdev_priv(ndev);
1572
1573 unregister_netdev(ndev);
1574 phy_disconnect(phydev);
1575 ixp4xx_mdio_remove();
1576 npe_port_tab[NPE_ID(port->id)] = NULL;
1577 npe_release(port->npe);
1578 return 0;
1579}
1580
1581static const struct of_device_id ixp4xx_eth_of_match[] = {
1582 {
1583 .compatible = "intel,ixp4xx-ethernet",
1584 },
1585 { },
1586};
1587
1588static struct platform_driver ixp4xx_eth_driver = {
1589 .driver = {
1590 .name = DRV_NAME,
1591 .of_match_table = of_match_ptr(ixp4xx_eth_of_match),
1592 },
1593 .probe = ixp4xx_eth_probe,
1594 .remove = ixp4xx_eth_remove,
1595};
1596module_platform_driver(ixp4xx_eth_driver);
1597
1598MODULE_AUTHOR("Krzysztof Halasa");
1599MODULE_DESCRIPTION("Intel IXP4xx Ethernet driver");
1600MODULE_LICENSE("GPL v2");
1601MODULE_ALIAS("platform:ixp4xx_eth");