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1/* r128_cce.c -- ATI Rage 128 driver -*- linux-c -*-
2 * Created: Wed Apr 5 19:24:19 2000 by kevin@precisioninsight.com
3 */
4/*
5 * Copyright 2000 Precision Insight, Inc., Cedar Park, Texas.
6 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
7 * All Rights Reserved.
8 *
9 * Permission is hereby granted, free of charge, to any person obtaining a
10 * copy of this software and associated documentation files (the "Software"),
11 * to deal in the Software without restriction, including without limitation
12 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
13 * and/or sell copies of the Software, and to permit persons to whom the
14 * Software is furnished to do so, subject to the following conditions:
15 *
16 * The above copyright notice and this permission notice (including the next
17 * paragraph) shall be included in all copies or substantial portions of the
18 * Software.
19 *
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
21 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
23 * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
24 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
25 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
26 * DEALINGS IN THE SOFTWARE.
27 *
28 * Authors:
29 * Gareth Hughes <gareth@valinux.com>
30 */
31
32#include <linux/firmware.h>
33#include <linux/platform_device.h>
34#include <linux/slab.h>
35
36#include "drmP.h"
37#include "drm.h"
38#include "r128_drm.h"
39#include "r128_drv.h"
40
41#define R128_FIFO_DEBUG 0
42
43#define FIRMWARE_NAME "r128/r128_cce.bin"
44
45MODULE_FIRMWARE(FIRMWARE_NAME);
46
47static int R128_READ_PLL(struct drm_device *dev, int addr)
48{
49 drm_r128_private_t *dev_priv = dev->dev_private;
50
51 R128_WRITE8(R128_CLOCK_CNTL_INDEX, addr & 0x1f);
52 return R128_READ(R128_CLOCK_CNTL_DATA);
53}
54
55#if R128_FIFO_DEBUG
56static void r128_status(drm_r128_private_t *dev_priv)
57{
58 printk("GUI_STAT = 0x%08x\n",
59 (unsigned int)R128_READ(R128_GUI_STAT));
60 printk("PM4_STAT = 0x%08x\n",
61 (unsigned int)R128_READ(R128_PM4_STAT));
62 printk("PM4_BUFFER_DL_WPTR = 0x%08x\n",
63 (unsigned int)R128_READ(R128_PM4_BUFFER_DL_WPTR));
64 printk("PM4_BUFFER_DL_RPTR = 0x%08x\n",
65 (unsigned int)R128_READ(R128_PM4_BUFFER_DL_RPTR));
66 printk("PM4_MICRO_CNTL = 0x%08x\n",
67 (unsigned int)R128_READ(R128_PM4_MICRO_CNTL));
68 printk("PM4_BUFFER_CNTL = 0x%08x\n",
69 (unsigned int)R128_READ(R128_PM4_BUFFER_CNTL));
70}
71#endif
72
73/* ================================================================
74 * Engine, FIFO control
75 */
76
77static int r128_do_pixcache_flush(drm_r128_private_t *dev_priv)
78{
79 u32 tmp;
80 int i;
81
82 tmp = R128_READ(R128_PC_NGUI_CTLSTAT) | R128_PC_FLUSH_ALL;
83 R128_WRITE(R128_PC_NGUI_CTLSTAT, tmp);
84
85 for (i = 0; i < dev_priv->usec_timeout; i++) {
86 if (!(R128_READ(R128_PC_NGUI_CTLSTAT) & R128_PC_BUSY))
87 return 0;
88 DRM_UDELAY(1);
89 }
90
91#if R128_FIFO_DEBUG
92 DRM_ERROR("failed!\n");
93#endif
94 return -EBUSY;
95}
96
97static int r128_do_wait_for_fifo(drm_r128_private_t *dev_priv, int entries)
98{
99 int i;
100
101 for (i = 0; i < dev_priv->usec_timeout; i++) {
102 int slots = R128_READ(R128_GUI_STAT) & R128_GUI_FIFOCNT_MASK;
103 if (slots >= entries)
104 return 0;
105 DRM_UDELAY(1);
106 }
107
108#if R128_FIFO_DEBUG
109 DRM_ERROR("failed!\n");
110#endif
111 return -EBUSY;
112}
113
114static int r128_do_wait_for_idle(drm_r128_private_t *dev_priv)
115{
116 int i, ret;
117
118 ret = r128_do_wait_for_fifo(dev_priv, 64);
119 if (ret)
120 return ret;
121
122 for (i = 0; i < dev_priv->usec_timeout; i++) {
123 if (!(R128_READ(R128_GUI_STAT) & R128_GUI_ACTIVE)) {
124 r128_do_pixcache_flush(dev_priv);
125 return 0;
126 }
127 DRM_UDELAY(1);
128 }
129
130#if R128_FIFO_DEBUG
131 DRM_ERROR("failed!\n");
132#endif
133 return -EBUSY;
134}
135
136/* ================================================================
137 * CCE control, initialization
138 */
139
140/* Load the microcode for the CCE */
141static int r128_cce_load_microcode(drm_r128_private_t *dev_priv)
142{
143 struct platform_device *pdev;
144 const struct firmware *fw;
145 const __be32 *fw_data;
146 int rc, i;
147
148 DRM_DEBUG("\n");
149
150 pdev = platform_device_register_simple("r128_cce", 0, NULL, 0);
151 if (IS_ERR(pdev)) {
152 printk(KERN_ERR "r128_cce: Failed to register firmware\n");
153 return PTR_ERR(pdev);
154 }
155 rc = request_firmware(&fw, FIRMWARE_NAME, &pdev->dev);
156 platform_device_unregister(pdev);
157 if (rc) {
158 printk(KERN_ERR "r128_cce: Failed to load firmware \"%s\"\n",
159 FIRMWARE_NAME);
160 return rc;
161 }
162
163 if (fw->size != 256 * 8) {
164 printk(KERN_ERR
165 "r128_cce: Bogus length %zu in firmware \"%s\"\n",
166 fw->size, FIRMWARE_NAME);
167 rc = -EINVAL;
168 goto out_release;
169 }
170
171 r128_do_wait_for_idle(dev_priv);
172
173 fw_data = (const __be32 *)fw->data;
174 R128_WRITE(R128_PM4_MICROCODE_ADDR, 0);
175 for (i = 0; i < 256; i++) {
176 R128_WRITE(R128_PM4_MICROCODE_DATAH,
177 be32_to_cpup(&fw_data[i * 2]));
178 R128_WRITE(R128_PM4_MICROCODE_DATAL,
179 be32_to_cpup(&fw_data[i * 2 + 1]));
180 }
181
182out_release:
183 release_firmware(fw);
184 return rc;
185}
186
187/* Flush any pending commands to the CCE. This should only be used just
188 * prior to a wait for idle, as it informs the engine that the command
189 * stream is ending.
190 */
191static void r128_do_cce_flush(drm_r128_private_t *dev_priv)
192{
193 u32 tmp;
194
195 tmp = R128_READ(R128_PM4_BUFFER_DL_WPTR) | R128_PM4_BUFFER_DL_DONE;
196 R128_WRITE(R128_PM4_BUFFER_DL_WPTR, tmp);
197}
198
199/* Wait for the CCE to go idle.
200 */
201int r128_do_cce_idle(drm_r128_private_t *dev_priv)
202{
203 int i;
204
205 for (i = 0; i < dev_priv->usec_timeout; i++) {
206 if (GET_RING_HEAD(dev_priv) == dev_priv->ring.tail) {
207 int pm4stat = R128_READ(R128_PM4_STAT);
208 if (((pm4stat & R128_PM4_FIFOCNT_MASK) >=
209 dev_priv->cce_fifo_size) &&
210 !(pm4stat & (R128_PM4_BUSY |
211 R128_PM4_GUI_ACTIVE))) {
212 return r128_do_pixcache_flush(dev_priv);
213 }
214 }
215 DRM_UDELAY(1);
216 }
217
218#if R128_FIFO_DEBUG
219 DRM_ERROR("failed!\n");
220 r128_status(dev_priv);
221#endif
222 return -EBUSY;
223}
224
225/* Start the Concurrent Command Engine.
226 */
227static void r128_do_cce_start(drm_r128_private_t *dev_priv)
228{
229 r128_do_wait_for_idle(dev_priv);
230
231 R128_WRITE(R128_PM4_BUFFER_CNTL,
232 dev_priv->cce_mode | dev_priv->ring.size_l2qw
233 | R128_PM4_BUFFER_CNTL_NOUPDATE);
234 R128_READ(R128_PM4_BUFFER_ADDR); /* as per the sample code */
235 R128_WRITE(R128_PM4_MICRO_CNTL, R128_PM4_MICRO_FREERUN);
236
237 dev_priv->cce_running = 1;
238}
239
240/* Reset the Concurrent Command Engine. This will not flush any pending
241 * commands, so you must wait for the CCE command stream to complete
242 * before calling this routine.
243 */
244static void r128_do_cce_reset(drm_r128_private_t *dev_priv)
245{
246 R128_WRITE(R128_PM4_BUFFER_DL_WPTR, 0);
247 R128_WRITE(R128_PM4_BUFFER_DL_RPTR, 0);
248 dev_priv->ring.tail = 0;
249}
250
251/* Stop the Concurrent Command Engine. This will not flush any pending
252 * commands, so you must flush the command stream and wait for the CCE
253 * to go idle before calling this routine.
254 */
255static void r128_do_cce_stop(drm_r128_private_t *dev_priv)
256{
257 R128_WRITE(R128_PM4_MICRO_CNTL, 0);
258 R128_WRITE(R128_PM4_BUFFER_CNTL,
259 R128_PM4_NONPM4 | R128_PM4_BUFFER_CNTL_NOUPDATE);
260
261 dev_priv->cce_running = 0;
262}
263
264/* Reset the engine. This will stop the CCE if it is running.
265 */
266static int r128_do_engine_reset(struct drm_device *dev)
267{
268 drm_r128_private_t *dev_priv = dev->dev_private;
269 u32 clock_cntl_index, mclk_cntl, gen_reset_cntl;
270
271 r128_do_pixcache_flush(dev_priv);
272
273 clock_cntl_index = R128_READ(R128_CLOCK_CNTL_INDEX);
274 mclk_cntl = R128_READ_PLL(dev, R128_MCLK_CNTL);
275
276 R128_WRITE_PLL(R128_MCLK_CNTL,
277 mclk_cntl | R128_FORCE_GCP | R128_FORCE_PIPE3D_CP);
278
279 gen_reset_cntl = R128_READ(R128_GEN_RESET_CNTL);
280
281 /* Taken from the sample code - do not change */
282 R128_WRITE(R128_GEN_RESET_CNTL, gen_reset_cntl | R128_SOFT_RESET_GUI);
283 R128_READ(R128_GEN_RESET_CNTL);
284 R128_WRITE(R128_GEN_RESET_CNTL, gen_reset_cntl & ~R128_SOFT_RESET_GUI);
285 R128_READ(R128_GEN_RESET_CNTL);
286
287 R128_WRITE_PLL(R128_MCLK_CNTL, mclk_cntl);
288 R128_WRITE(R128_CLOCK_CNTL_INDEX, clock_cntl_index);
289 R128_WRITE(R128_GEN_RESET_CNTL, gen_reset_cntl);
290
291 /* Reset the CCE ring */
292 r128_do_cce_reset(dev_priv);
293
294 /* The CCE is no longer running after an engine reset */
295 dev_priv->cce_running = 0;
296
297 /* Reset any pending vertex, indirect buffers */
298 r128_freelist_reset(dev);
299
300 return 0;
301}
302
303static void r128_cce_init_ring_buffer(struct drm_device *dev,
304 drm_r128_private_t *dev_priv)
305{
306 u32 ring_start;
307 u32 tmp;
308
309 DRM_DEBUG("\n");
310
311 /* The manual (p. 2) says this address is in "VM space". This
312 * means it's an offset from the start of AGP space.
313 */
314#if __OS_HAS_AGP
315 if (!dev_priv->is_pci)
316 ring_start = dev_priv->cce_ring->offset - dev->agp->base;
317 else
318#endif
319 ring_start = dev_priv->cce_ring->offset -
320 (unsigned long)dev->sg->virtual;
321
322 R128_WRITE(R128_PM4_BUFFER_OFFSET, ring_start | R128_AGP_OFFSET);
323
324 R128_WRITE(R128_PM4_BUFFER_DL_WPTR, 0);
325 R128_WRITE(R128_PM4_BUFFER_DL_RPTR, 0);
326
327 /* Set watermark control */
328 R128_WRITE(R128_PM4_BUFFER_WM_CNTL,
329 ((R128_WATERMARK_L / 4) << R128_WMA_SHIFT)
330 | ((R128_WATERMARK_M / 4) << R128_WMB_SHIFT)
331 | ((R128_WATERMARK_N / 4) << R128_WMC_SHIFT)
332 | ((R128_WATERMARK_K / 64) << R128_WB_WM_SHIFT));
333
334 /* Force read. Why? Because it's in the examples... */
335 R128_READ(R128_PM4_BUFFER_ADDR);
336
337 /* Turn on bus mastering */
338 tmp = R128_READ(R128_BUS_CNTL) & ~R128_BUS_MASTER_DIS;
339 R128_WRITE(R128_BUS_CNTL, tmp);
340}
341
342static int r128_do_init_cce(struct drm_device *dev, drm_r128_init_t *init)
343{
344 drm_r128_private_t *dev_priv;
345 int rc;
346
347 DRM_DEBUG("\n");
348
349 if (dev->dev_private) {
350 DRM_DEBUG("called when already initialized\n");
351 return -EINVAL;
352 }
353
354 dev_priv = kzalloc(sizeof(drm_r128_private_t), GFP_KERNEL);
355 if (dev_priv == NULL)
356 return -ENOMEM;
357
358 dev_priv->is_pci = init->is_pci;
359
360 if (dev_priv->is_pci && !dev->sg) {
361 DRM_ERROR("PCI GART memory not allocated!\n");
362 dev->dev_private = (void *)dev_priv;
363 r128_do_cleanup_cce(dev);
364 return -EINVAL;
365 }
366
367 dev_priv->usec_timeout = init->usec_timeout;
368 if (dev_priv->usec_timeout < 1 ||
369 dev_priv->usec_timeout > R128_MAX_USEC_TIMEOUT) {
370 DRM_DEBUG("TIMEOUT problem!\n");
371 dev->dev_private = (void *)dev_priv;
372 r128_do_cleanup_cce(dev);
373 return -EINVAL;
374 }
375
376 dev_priv->cce_mode = init->cce_mode;
377
378 /* GH: Simple idle check.
379 */
380 atomic_set(&dev_priv->idle_count, 0);
381
382 /* We don't support anything other than bus-mastering ring mode,
383 * but the ring can be in either AGP or PCI space for the ring
384 * read pointer.
385 */
386 if ((init->cce_mode != R128_PM4_192BM) &&
387 (init->cce_mode != R128_PM4_128BM_64INDBM) &&
388 (init->cce_mode != R128_PM4_64BM_128INDBM) &&
389 (init->cce_mode != R128_PM4_64BM_64VCBM_64INDBM)) {
390 DRM_DEBUG("Bad cce_mode!\n");
391 dev->dev_private = (void *)dev_priv;
392 r128_do_cleanup_cce(dev);
393 return -EINVAL;
394 }
395
396 switch (init->cce_mode) {
397 case R128_PM4_NONPM4:
398 dev_priv->cce_fifo_size = 0;
399 break;
400 case R128_PM4_192PIO:
401 case R128_PM4_192BM:
402 dev_priv->cce_fifo_size = 192;
403 break;
404 case R128_PM4_128PIO_64INDBM:
405 case R128_PM4_128BM_64INDBM:
406 dev_priv->cce_fifo_size = 128;
407 break;
408 case R128_PM4_64PIO_128INDBM:
409 case R128_PM4_64BM_128INDBM:
410 case R128_PM4_64PIO_64VCBM_64INDBM:
411 case R128_PM4_64BM_64VCBM_64INDBM:
412 case R128_PM4_64PIO_64VCPIO_64INDPIO:
413 dev_priv->cce_fifo_size = 64;
414 break;
415 }
416
417 switch (init->fb_bpp) {
418 case 16:
419 dev_priv->color_fmt = R128_DATATYPE_RGB565;
420 break;
421 case 32:
422 default:
423 dev_priv->color_fmt = R128_DATATYPE_ARGB8888;
424 break;
425 }
426 dev_priv->front_offset = init->front_offset;
427 dev_priv->front_pitch = init->front_pitch;
428 dev_priv->back_offset = init->back_offset;
429 dev_priv->back_pitch = init->back_pitch;
430
431 switch (init->depth_bpp) {
432 case 16:
433 dev_priv->depth_fmt = R128_DATATYPE_RGB565;
434 break;
435 case 24:
436 case 32:
437 default:
438 dev_priv->depth_fmt = R128_DATATYPE_ARGB8888;
439 break;
440 }
441 dev_priv->depth_offset = init->depth_offset;
442 dev_priv->depth_pitch = init->depth_pitch;
443 dev_priv->span_offset = init->span_offset;
444
445 dev_priv->front_pitch_offset_c = (((dev_priv->front_pitch / 8) << 21) |
446 (dev_priv->front_offset >> 5));
447 dev_priv->back_pitch_offset_c = (((dev_priv->back_pitch / 8) << 21) |
448 (dev_priv->back_offset >> 5));
449 dev_priv->depth_pitch_offset_c = (((dev_priv->depth_pitch / 8) << 21) |
450 (dev_priv->depth_offset >> 5) |
451 R128_DST_TILE);
452 dev_priv->span_pitch_offset_c = (((dev_priv->depth_pitch / 8) << 21) |
453 (dev_priv->span_offset >> 5));
454
455 dev_priv->sarea = drm_getsarea(dev);
456 if (!dev_priv->sarea) {
457 DRM_ERROR("could not find sarea!\n");
458 dev->dev_private = (void *)dev_priv;
459 r128_do_cleanup_cce(dev);
460 return -EINVAL;
461 }
462
463 dev_priv->mmio = drm_core_findmap(dev, init->mmio_offset);
464 if (!dev_priv->mmio) {
465 DRM_ERROR("could not find mmio region!\n");
466 dev->dev_private = (void *)dev_priv;
467 r128_do_cleanup_cce(dev);
468 return -EINVAL;
469 }
470 dev_priv->cce_ring = drm_core_findmap(dev, init->ring_offset);
471 if (!dev_priv->cce_ring) {
472 DRM_ERROR("could not find cce ring region!\n");
473 dev->dev_private = (void *)dev_priv;
474 r128_do_cleanup_cce(dev);
475 return -EINVAL;
476 }
477 dev_priv->ring_rptr = drm_core_findmap(dev, init->ring_rptr_offset);
478 if (!dev_priv->ring_rptr) {
479 DRM_ERROR("could not find ring read pointer!\n");
480 dev->dev_private = (void *)dev_priv;
481 r128_do_cleanup_cce(dev);
482 return -EINVAL;
483 }
484 dev->agp_buffer_token = init->buffers_offset;
485 dev->agp_buffer_map = drm_core_findmap(dev, init->buffers_offset);
486 if (!dev->agp_buffer_map) {
487 DRM_ERROR("could not find dma buffer region!\n");
488 dev->dev_private = (void *)dev_priv;
489 r128_do_cleanup_cce(dev);
490 return -EINVAL;
491 }
492
493 if (!dev_priv->is_pci) {
494 dev_priv->agp_textures =
495 drm_core_findmap(dev, init->agp_textures_offset);
496 if (!dev_priv->agp_textures) {
497 DRM_ERROR("could not find agp texture region!\n");
498 dev->dev_private = (void *)dev_priv;
499 r128_do_cleanup_cce(dev);
500 return -EINVAL;
501 }
502 }
503
504 dev_priv->sarea_priv =
505 (drm_r128_sarea_t *) ((u8 *) dev_priv->sarea->handle +
506 init->sarea_priv_offset);
507
508#if __OS_HAS_AGP
509 if (!dev_priv->is_pci) {
510 drm_core_ioremap_wc(dev_priv->cce_ring, dev);
511 drm_core_ioremap_wc(dev_priv->ring_rptr, dev);
512 drm_core_ioremap_wc(dev->agp_buffer_map, dev);
513 if (!dev_priv->cce_ring->handle ||
514 !dev_priv->ring_rptr->handle ||
515 !dev->agp_buffer_map->handle) {
516 DRM_ERROR("Could not ioremap agp regions!\n");
517 dev->dev_private = (void *)dev_priv;
518 r128_do_cleanup_cce(dev);
519 return -ENOMEM;
520 }
521 } else
522#endif
523 {
524 dev_priv->cce_ring->handle =
525 (void *)(unsigned long)dev_priv->cce_ring->offset;
526 dev_priv->ring_rptr->handle =
527 (void *)(unsigned long)dev_priv->ring_rptr->offset;
528 dev->agp_buffer_map->handle =
529 (void *)(unsigned long)dev->agp_buffer_map->offset;
530 }
531
532#if __OS_HAS_AGP
533 if (!dev_priv->is_pci)
534 dev_priv->cce_buffers_offset = dev->agp->base;
535 else
536#endif
537 dev_priv->cce_buffers_offset = (unsigned long)dev->sg->virtual;
538
539 dev_priv->ring.start = (u32 *) dev_priv->cce_ring->handle;
540 dev_priv->ring.end = ((u32 *) dev_priv->cce_ring->handle
541 + init->ring_size / sizeof(u32));
542 dev_priv->ring.size = init->ring_size;
543 dev_priv->ring.size_l2qw = drm_order(init->ring_size / 8);
544
545 dev_priv->ring.tail_mask = (dev_priv->ring.size / sizeof(u32)) - 1;
546
547 dev_priv->ring.high_mark = 128;
548
549 dev_priv->sarea_priv->last_frame = 0;
550 R128_WRITE(R128_LAST_FRAME_REG, dev_priv->sarea_priv->last_frame);
551
552 dev_priv->sarea_priv->last_dispatch = 0;
553 R128_WRITE(R128_LAST_DISPATCH_REG, dev_priv->sarea_priv->last_dispatch);
554
555#if __OS_HAS_AGP
556 if (dev_priv->is_pci) {
557#endif
558 dev_priv->gart_info.table_mask = DMA_BIT_MASK(32);
559 dev_priv->gart_info.gart_table_location = DRM_ATI_GART_MAIN;
560 dev_priv->gart_info.table_size = R128_PCIGART_TABLE_SIZE;
561 dev_priv->gart_info.addr = NULL;
562 dev_priv->gart_info.bus_addr = 0;
563 dev_priv->gart_info.gart_reg_if = DRM_ATI_GART_PCI;
564 if (!drm_ati_pcigart_init(dev, &dev_priv->gart_info)) {
565 DRM_ERROR("failed to init PCI GART!\n");
566 dev->dev_private = (void *)dev_priv;
567 r128_do_cleanup_cce(dev);
568 return -ENOMEM;
569 }
570 R128_WRITE(R128_PCI_GART_PAGE, dev_priv->gart_info.bus_addr);
571#if __OS_HAS_AGP
572 }
573#endif
574
575 r128_cce_init_ring_buffer(dev, dev_priv);
576 rc = r128_cce_load_microcode(dev_priv);
577
578 dev->dev_private = (void *)dev_priv;
579
580 r128_do_engine_reset(dev);
581
582 if (rc) {
583 DRM_ERROR("Failed to load firmware!\n");
584 r128_do_cleanup_cce(dev);
585 }
586
587 return rc;
588}
589
590int r128_do_cleanup_cce(struct drm_device *dev)
591{
592
593 /* Make sure interrupts are disabled here because the uninstall ioctl
594 * may not have been called from userspace and after dev_private
595 * is freed, it's too late.
596 */
597 if (dev->irq_enabled)
598 drm_irq_uninstall(dev);
599
600 if (dev->dev_private) {
601 drm_r128_private_t *dev_priv = dev->dev_private;
602
603#if __OS_HAS_AGP
604 if (!dev_priv->is_pci) {
605 if (dev_priv->cce_ring != NULL)
606 drm_core_ioremapfree(dev_priv->cce_ring, dev);
607 if (dev_priv->ring_rptr != NULL)
608 drm_core_ioremapfree(dev_priv->ring_rptr, dev);
609 if (dev->agp_buffer_map != NULL) {
610 drm_core_ioremapfree(dev->agp_buffer_map, dev);
611 dev->agp_buffer_map = NULL;
612 }
613 } else
614#endif
615 {
616 if (dev_priv->gart_info.bus_addr)
617 if (!drm_ati_pcigart_cleanup(dev,
618 &dev_priv->gart_info))
619 DRM_ERROR
620 ("failed to cleanup PCI GART!\n");
621 }
622
623 kfree(dev->dev_private);
624 dev->dev_private = NULL;
625 }
626
627 return 0;
628}
629
630int r128_cce_init(struct drm_device *dev, void *data, struct drm_file *file_priv)
631{
632 drm_r128_init_t *init = data;
633
634 DRM_DEBUG("\n");
635
636 LOCK_TEST_WITH_RETURN(dev, file_priv);
637
638 switch (init->func) {
639 case R128_INIT_CCE:
640 return r128_do_init_cce(dev, init);
641 case R128_CLEANUP_CCE:
642 return r128_do_cleanup_cce(dev);
643 }
644
645 return -EINVAL;
646}
647
648int r128_cce_start(struct drm_device *dev, void *data, struct drm_file *file_priv)
649{
650 drm_r128_private_t *dev_priv = dev->dev_private;
651 DRM_DEBUG("\n");
652
653 LOCK_TEST_WITH_RETURN(dev, file_priv);
654
655 DEV_INIT_TEST_WITH_RETURN(dev_priv);
656
657 if (dev_priv->cce_running || dev_priv->cce_mode == R128_PM4_NONPM4) {
658 DRM_DEBUG("while CCE running\n");
659 return 0;
660 }
661
662 r128_do_cce_start(dev_priv);
663
664 return 0;
665}
666
667/* Stop the CCE. The engine must have been idled before calling this
668 * routine.
669 */
670int r128_cce_stop(struct drm_device *dev, void *data, struct drm_file *file_priv)
671{
672 drm_r128_private_t *dev_priv = dev->dev_private;
673 drm_r128_cce_stop_t *stop = data;
674 int ret;
675 DRM_DEBUG("\n");
676
677 LOCK_TEST_WITH_RETURN(dev, file_priv);
678
679 DEV_INIT_TEST_WITH_RETURN(dev_priv);
680
681 /* Flush any pending CCE commands. This ensures any outstanding
682 * commands are exectuted by the engine before we turn it off.
683 */
684 if (stop->flush)
685 r128_do_cce_flush(dev_priv);
686
687 /* If we fail to make the engine go idle, we return an error
688 * code so that the DRM ioctl wrapper can try again.
689 */
690 if (stop->idle) {
691 ret = r128_do_cce_idle(dev_priv);
692 if (ret)
693 return ret;
694 }
695
696 /* Finally, we can turn off the CCE. If the engine isn't idle,
697 * we will get some dropped triangles as they won't be fully
698 * rendered before the CCE is shut down.
699 */
700 r128_do_cce_stop(dev_priv);
701
702 /* Reset the engine */
703 r128_do_engine_reset(dev);
704
705 return 0;
706}
707
708/* Just reset the CCE ring. Called as part of an X Server engine reset.
709 */
710int r128_cce_reset(struct drm_device *dev, void *data, struct drm_file *file_priv)
711{
712 drm_r128_private_t *dev_priv = dev->dev_private;
713 DRM_DEBUG("\n");
714
715 LOCK_TEST_WITH_RETURN(dev, file_priv);
716
717 DEV_INIT_TEST_WITH_RETURN(dev_priv);
718
719 r128_do_cce_reset(dev_priv);
720
721 /* The CCE is no longer running after an engine reset */
722 dev_priv->cce_running = 0;
723
724 return 0;
725}
726
727int r128_cce_idle(struct drm_device *dev, void *data, struct drm_file *file_priv)
728{
729 drm_r128_private_t *dev_priv = dev->dev_private;
730 DRM_DEBUG("\n");
731
732 LOCK_TEST_WITH_RETURN(dev, file_priv);
733
734 DEV_INIT_TEST_WITH_RETURN(dev_priv);
735
736 if (dev_priv->cce_running)
737 r128_do_cce_flush(dev_priv);
738
739 return r128_do_cce_idle(dev_priv);
740}
741
742int r128_engine_reset(struct drm_device *dev, void *data, struct drm_file *file_priv)
743{
744 DRM_DEBUG("\n");
745
746 LOCK_TEST_WITH_RETURN(dev, file_priv);
747
748 DEV_INIT_TEST_WITH_RETURN(dev->dev_private);
749
750 return r128_do_engine_reset(dev);
751}
752
753int r128_fullscreen(struct drm_device *dev, void *data, struct drm_file *file_priv)
754{
755 return -EINVAL;
756}
757
758/* ================================================================
759 * Freelist management
760 */
761#define R128_BUFFER_USED 0xffffffff
762#define R128_BUFFER_FREE 0
763
764#if 0
765static int r128_freelist_init(struct drm_device *dev)
766{
767 struct drm_device_dma *dma = dev->dma;
768 drm_r128_private_t *dev_priv = dev->dev_private;
769 struct drm_buf *buf;
770 drm_r128_buf_priv_t *buf_priv;
771 drm_r128_freelist_t *entry;
772 int i;
773
774 dev_priv->head = kzalloc(sizeof(drm_r128_freelist_t), GFP_KERNEL);
775 if (dev_priv->head == NULL)
776 return -ENOMEM;
777
778 dev_priv->head->age = R128_BUFFER_USED;
779
780 for (i = 0; i < dma->buf_count; i++) {
781 buf = dma->buflist[i];
782 buf_priv = buf->dev_private;
783
784 entry = kmalloc(sizeof(drm_r128_freelist_t), GFP_KERNEL);
785 if (!entry)
786 return -ENOMEM;
787
788 entry->age = R128_BUFFER_FREE;
789 entry->buf = buf;
790 entry->prev = dev_priv->head;
791 entry->next = dev_priv->head->next;
792 if (!entry->next)
793 dev_priv->tail = entry;
794
795 buf_priv->discard = 0;
796 buf_priv->dispatched = 0;
797 buf_priv->list_entry = entry;
798
799 dev_priv->head->next = entry;
800
801 if (dev_priv->head->next)
802 dev_priv->head->next->prev = entry;
803 }
804
805 return 0;
806
807}
808#endif
809
810static struct drm_buf *r128_freelist_get(struct drm_device * dev)
811{
812 struct drm_device_dma *dma = dev->dma;
813 drm_r128_private_t *dev_priv = dev->dev_private;
814 drm_r128_buf_priv_t *buf_priv;
815 struct drm_buf *buf;
816 int i, t;
817
818 /* FIXME: Optimize -- use freelist code */
819
820 for (i = 0; i < dma->buf_count; i++) {
821 buf = dma->buflist[i];
822 buf_priv = buf->dev_private;
823 if (!buf->file_priv)
824 return buf;
825 }
826
827 for (t = 0; t < dev_priv->usec_timeout; t++) {
828 u32 done_age = R128_READ(R128_LAST_DISPATCH_REG);
829
830 for (i = 0; i < dma->buf_count; i++) {
831 buf = dma->buflist[i];
832 buf_priv = buf->dev_private;
833 if (buf->pending && buf_priv->age <= done_age) {
834 /* The buffer has been processed, so it
835 * can now be used.
836 */
837 buf->pending = 0;
838 return buf;
839 }
840 }
841 DRM_UDELAY(1);
842 }
843
844 DRM_DEBUG("returning NULL!\n");
845 return NULL;
846}
847
848void r128_freelist_reset(struct drm_device *dev)
849{
850 struct drm_device_dma *dma = dev->dma;
851 int i;
852
853 for (i = 0; i < dma->buf_count; i++) {
854 struct drm_buf *buf = dma->buflist[i];
855 drm_r128_buf_priv_t *buf_priv = buf->dev_private;
856 buf_priv->age = 0;
857 }
858}
859
860/* ================================================================
861 * CCE command submission
862 */
863
864int r128_wait_ring(drm_r128_private_t *dev_priv, int n)
865{
866 drm_r128_ring_buffer_t *ring = &dev_priv->ring;
867 int i;
868
869 for (i = 0; i < dev_priv->usec_timeout; i++) {
870 r128_update_ring_snapshot(dev_priv);
871 if (ring->space >= n)
872 return 0;
873 DRM_UDELAY(1);
874 }
875
876 /* FIXME: This is being ignored... */
877 DRM_ERROR("failed!\n");
878 return -EBUSY;
879}
880
881static int r128_cce_get_buffers(struct drm_device *dev,
882 struct drm_file *file_priv,
883 struct drm_dma *d)
884{
885 int i;
886 struct drm_buf *buf;
887
888 for (i = d->granted_count; i < d->request_count; i++) {
889 buf = r128_freelist_get(dev);
890 if (!buf)
891 return -EAGAIN;
892
893 buf->file_priv = file_priv;
894
895 if (DRM_COPY_TO_USER(&d->request_indices[i], &buf->idx,
896 sizeof(buf->idx)))
897 return -EFAULT;
898 if (DRM_COPY_TO_USER(&d->request_sizes[i], &buf->total,
899 sizeof(buf->total)))
900 return -EFAULT;
901
902 d->granted_count++;
903 }
904 return 0;
905}
906
907int r128_cce_buffers(struct drm_device *dev, void *data, struct drm_file *file_priv)
908{
909 struct drm_device_dma *dma = dev->dma;
910 int ret = 0;
911 struct drm_dma *d = data;
912
913 LOCK_TEST_WITH_RETURN(dev, file_priv);
914
915 /* Please don't send us buffers.
916 */
917 if (d->send_count != 0) {
918 DRM_ERROR("Process %d trying to send %d buffers via drmDMA\n",
919 DRM_CURRENTPID, d->send_count);
920 return -EINVAL;
921 }
922
923 /* We'll send you buffers.
924 */
925 if (d->request_count < 0 || d->request_count > dma->buf_count) {
926 DRM_ERROR("Process %d trying to get %d buffers (of %d max)\n",
927 DRM_CURRENTPID, d->request_count, dma->buf_count);
928 return -EINVAL;
929 }
930
931 d->granted_count = 0;
932
933 if (d->request_count)
934 ret = r128_cce_get_buffers(dev, file_priv, d);
935
936 return ret;
937}
1/* r128_cce.c -- ATI Rage 128 driver -*- linux-c -*-
2 * Created: Wed Apr 5 19:24:19 2000 by kevin@precisioninsight.com
3 */
4/*
5 * Copyright 2000 Precision Insight, Inc., Cedar Park, Texas.
6 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
7 * All Rights Reserved.
8 *
9 * Permission is hereby granted, free of charge, to any person obtaining a
10 * copy of this software and associated documentation files (the "Software"),
11 * to deal in the Software without restriction, including without limitation
12 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
13 * and/or sell copies of the Software, and to permit persons to whom the
14 * Software is furnished to do so, subject to the following conditions:
15 *
16 * The above copyright notice and this permission notice (including the next
17 * paragraph) shall be included in all copies or substantial portions of the
18 * Software.
19 *
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
21 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
23 * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
24 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
25 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
26 * DEALINGS IN THE SOFTWARE.
27 *
28 * Authors:
29 * Gareth Hughes <gareth@valinux.com>
30 */
31
32#include <linux/firmware.h>
33#include <linux/platform_device.h>
34#include <linux/slab.h>
35#include <linux/module.h>
36
37#include <drm/drmP.h>
38#include <drm/r128_drm.h>
39#include "r128_drv.h"
40
41#define R128_FIFO_DEBUG 0
42
43#define FIRMWARE_NAME "r128/r128_cce.bin"
44
45MODULE_FIRMWARE(FIRMWARE_NAME);
46
47static int R128_READ_PLL(struct drm_device *dev, int addr)
48{
49 drm_r128_private_t *dev_priv = dev->dev_private;
50
51 R128_WRITE8(R128_CLOCK_CNTL_INDEX, addr & 0x1f);
52 return R128_READ(R128_CLOCK_CNTL_DATA);
53}
54
55#if R128_FIFO_DEBUG
56static void r128_status(drm_r128_private_t *dev_priv)
57{
58 printk("GUI_STAT = 0x%08x\n",
59 (unsigned int)R128_READ(R128_GUI_STAT));
60 printk("PM4_STAT = 0x%08x\n",
61 (unsigned int)R128_READ(R128_PM4_STAT));
62 printk("PM4_BUFFER_DL_WPTR = 0x%08x\n",
63 (unsigned int)R128_READ(R128_PM4_BUFFER_DL_WPTR));
64 printk("PM4_BUFFER_DL_RPTR = 0x%08x\n",
65 (unsigned int)R128_READ(R128_PM4_BUFFER_DL_RPTR));
66 printk("PM4_MICRO_CNTL = 0x%08x\n",
67 (unsigned int)R128_READ(R128_PM4_MICRO_CNTL));
68 printk("PM4_BUFFER_CNTL = 0x%08x\n",
69 (unsigned int)R128_READ(R128_PM4_BUFFER_CNTL));
70}
71#endif
72
73/* ================================================================
74 * Engine, FIFO control
75 */
76
77static int r128_do_pixcache_flush(drm_r128_private_t *dev_priv)
78{
79 u32 tmp;
80 int i;
81
82 tmp = R128_READ(R128_PC_NGUI_CTLSTAT) | R128_PC_FLUSH_ALL;
83 R128_WRITE(R128_PC_NGUI_CTLSTAT, tmp);
84
85 for (i = 0; i < dev_priv->usec_timeout; i++) {
86 if (!(R128_READ(R128_PC_NGUI_CTLSTAT) & R128_PC_BUSY))
87 return 0;
88 DRM_UDELAY(1);
89 }
90
91#if R128_FIFO_DEBUG
92 DRM_ERROR("failed!\n");
93#endif
94 return -EBUSY;
95}
96
97static int r128_do_wait_for_fifo(drm_r128_private_t *dev_priv, int entries)
98{
99 int i;
100
101 for (i = 0; i < dev_priv->usec_timeout; i++) {
102 int slots = R128_READ(R128_GUI_STAT) & R128_GUI_FIFOCNT_MASK;
103 if (slots >= entries)
104 return 0;
105 DRM_UDELAY(1);
106 }
107
108#if R128_FIFO_DEBUG
109 DRM_ERROR("failed!\n");
110#endif
111 return -EBUSY;
112}
113
114static int r128_do_wait_for_idle(drm_r128_private_t *dev_priv)
115{
116 int i, ret;
117
118 ret = r128_do_wait_for_fifo(dev_priv, 64);
119 if (ret)
120 return ret;
121
122 for (i = 0; i < dev_priv->usec_timeout; i++) {
123 if (!(R128_READ(R128_GUI_STAT) & R128_GUI_ACTIVE)) {
124 r128_do_pixcache_flush(dev_priv);
125 return 0;
126 }
127 DRM_UDELAY(1);
128 }
129
130#if R128_FIFO_DEBUG
131 DRM_ERROR("failed!\n");
132#endif
133 return -EBUSY;
134}
135
136/* ================================================================
137 * CCE control, initialization
138 */
139
140/* Load the microcode for the CCE */
141static int r128_cce_load_microcode(drm_r128_private_t *dev_priv)
142{
143 struct platform_device *pdev;
144 const struct firmware *fw;
145 const __be32 *fw_data;
146 int rc, i;
147
148 DRM_DEBUG("\n");
149
150 pdev = platform_device_register_simple("r128_cce", 0, NULL, 0);
151 if (IS_ERR(pdev)) {
152 pr_err("r128_cce: Failed to register firmware\n");
153 return PTR_ERR(pdev);
154 }
155 rc = request_firmware(&fw, FIRMWARE_NAME, &pdev->dev);
156 platform_device_unregister(pdev);
157 if (rc) {
158 pr_err("r128_cce: Failed to load firmware \"%s\"\n",
159 FIRMWARE_NAME);
160 return rc;
161 }
162
163 if (fw->size != 256 * 8) {
164 pr_err("r128_cce: Bogus length %zu in firmware \"%s\"\n",
165 fw->size, FIRMWARE_NAME);
166 rc = -EINVAL;
167 goto out_release;
168 }
169
170 r128_do_wait_for_idle(dev_priv);
171
172 fw_data = (const __be32 *)fw->data;
173 R128_WRITE(R128_PM4_MICROCODE_ADDR, 0);
174 for (i = 0; i < 256; i++) {
175 R128_WRITE(R128_PM4_MICROCODE_DATAH,
176 be32_to_cpup(&fw_data[i * 2]));
177 R128_WRITE(R128_PM4_MICROCODE_DATAL,
178 be32_to_cpup(&fw_data[i * 2 + 1]));
179 }
180
181out_release:
182 release_firmware(fw);
183 return rc;
184}
185
186/* Flush any pending commands to the CCE. This should only be used just
187 * prior to a wait for idle, as it informs the engine that the command
188 * stream is ending.
189 */
190static void r128_do_cce_flush(drm_r128_private_t *dev_priv)
191{
192 u32 tmp;
193
194 tmp = R128_READ(R128_PM4_BUFFER_DL_WPTR) | R128_PM4_BUFFER_DL_DONE;
195 R128_WRITE(R128_PM4_BUFFER_DL_WPTR, tmp);
196}
197
198/* Wait for the CCE to go idle.
199 */
200int r128_do_cce_idle(drm_r128_private_t *dev_priv)
201{
202 int i;
203
204 for (i = 0; i < dev_priv->usec_timeout; i++) {
205 if (GET_RING_HEAD(dev_priv) == dev_priv->ring.tail) {
206 int pm4stat = R128_READ(R128_PM4_STAT);
207 if (((pm4stat & R128_PM4_FIFOCNT_MASK) >=
208 dev_priv->cce_fifo_size) &&
209 !(pm4stat & (R128_PM4_BUSY |
210 R128_PM4_GUI_ACTIVE))) {
211 return r128_do_pixcache_flush(dev_priv);
212 }
213 }
214 DRM_UDELAY(1);
215 }
216
217#if R128_FIFO_DEBUG
218 DRM_ERROR("failed!\n");
219 r128_status(dev_priv);
220#endif
221 return -EBUSY;
222}
223
224/* Start the Concurrent Command Engine.
225 */
226static void r128_do_cce_start(drm_r128_private_t *dev_priv)
227{
228 r128_do_wait_for_idle(dev_priv);
229
230 R128_WRITE(R128_PM4_BUFFER_CNTL,
231 dev_priv->cce_mode | dev_priv->ring.size_l2qw
232 | R128_PM4_BUFFER_CNTL_NOUPDATE);
233 R128_READ(R128_PM4_BUFFER_ADDR); /* as per the sample code */
234 R128_WRITE(R128_PM4_MICRO_CNTL, R128_PM4_MICRO_FREERUN);
235
236 dev_priv->cce_running = 1;
237}
238
239/* Reset the Concurrent Command Engine. This will not flush any pending
240 * commands, so you must wait for the CCE command stream to complete
241 * before calling this routine.
242 */
243static void r128_do_cce_reset(drm_r128_private_t *dev_priv)
244{
245 R128_WRITE(R128_PM4_BUFFER_DL_WPTR, 0);
246 R128_WRITE(R128_PM4_BUFFER_DL_RPTR, 0);
247 dev_priv->ring.tail = 0;
248}
249
250/* Stop the Concurrent Command Engine. This will not flush any pending
251 * commands, so you must flush the command stream and wait for the CCE
252 * to go idle before calling this routine.
253 */
254static void r128_do_cce_stop(drm_r128_private_t *dev_priv)
255{
256 R128_WRITE(R128_PM4_MICRO_CNTL, 0);
257 R128_WRITE(R128_PM4_BUFFER_CNTL,
258 R128_PM4_NONPM4 | R128_PM4_BUFFER_CNTL_NOUPDATE);
259
260 dev_priv->cce_running = 0;
261}
262
263/* Reset the engine. This will stop the CCE if it is running.
264 */
265static int r128_do_engine_reset(struct drm_device *dev)
266{
267 drm_r128_private_t *dev_priv = dev->dev_private;
268 u32 clock_cntl_index, mclk_cntl, gen_reset_cntl;
269
270 r128_do_pixcache_flush(dev_priv);
271
272 clock_cntl_index = R128_READ(R128_CLOCK_CNTL_INDEX);
273 mclk_cntl = R128_READ_PLL(dev, R128_MCLK_CNTL);
274
275 R128_WRITE_PLL(R128_MCLK_CNTL,
276 mclk_cntl | R128_FORCE_GCP | R128_FORCE_PIPE3D_CP);
277
278 gen_reset_cntl = R128_READ(R128_GEN_RESET_CNTL);
279
280 /* Taken from the sample code - do not change */
281 R128_WRITE(R128_GEN_RESET_CNTL, gen_reset_cntl | R128_SOFT_RESET_GUI);
282 R128_READ(R128_GEN_RESET_CNTL);
283 R128_WRITE(R128_GEN_RESET_CNTL, gen_reset_cntl & ~R128_SOFT_RESET_GUI);
284 R128_READ(R128_GEN_RESET_CNTL);
285
286 R128_WRITE_PLL(R128_MCLK_CNTL, mclk_cntl);
287 R128_WRITE(R128_CLOCK_CNTL_INDEX, clock_cntl_index);
288 R128_WRITE(R128_GEN_RESET_CNTL, gen_reset_cntl);
289
290 /* Reset the CCE ring */
291 r128_do_cce_reset(dev_priv);
292
293 /* The CCE is no longer running after an engine reset */
294 dev_priv->cce_running = 0;
295
296 /* Reset any pending vertex, indirect buffers */
297 r128_freelist_reset(dev);
298
299 return 0;
300}
301
302static void r128_cce_init_ring_buffer(struct drm_device *dev,
303 drm_r128_private_t *dev_priv)
304{
305 u32 ring_start;
306 u32 tmp;
307
308 DRM_DEBUG("\n");
309
310 /* The manual (p. 2) says this address is in "VM space". This
311 * means it's an offset from the start of AGP space.
312 */
313#if IS_ENABLED(CONFIG_AGP)
314 if (!dev_priv->is_pci)
315 ring_start = dev_priv->cce_ring->offset - dev->agp->base;
316 else
317#endif
318 ring_start = dev_priv->cce_ring->offset -
319 (unsigned long)dev->sg->virtual;
320
321 R128_WRITE(R128_PM4_BUFFER_OFFSET, ring_start | R128_AGP_OFFSET);
322
323 R128_WRITE(R128_PM4_BUFFER_DL_WPTR, 0);
324 R128_WRITE(R128_PM4_BUFFER_DL_RPTR, 0);
325
326 /* Set watermark control */
327 R128_WRITE(R128_PM4_BUFFER_WM_CNTL,
328 ((R128_WATERMARK_L / 4) << R128_WMA_SHIFT)
329 | ((R128_WATERMARK_M / 4) << R128_WMB_SHIFT)
330 | ((R128_WATERMARK_N / 4) << R128_WMC_SHIFT)
331 | ((R128_WATERMARK_K / 64) << R128_WB_WM_SHIFT));
332
333 /* Force read. Why? Because it's in the examples... */
334 R128_READ(R128_PM4_BUFFER_ADDR);
335
336 /* Turn on bus mastering */
337 tmp = R128_READ(R128_BUS_CNTL) & ~R128_BUS_MASTER_DIS;
338 R128_WRITE(R128_BUS_CNTL, tmp);
339}
340
341static int r128_do_init_cce(struct drm_device *dev, drm_r128_init_t *init)
342{
343 drm_r128_private_t *dev_priv;
344 int rc;
345
346 DRM_DEBUG("\n");
347
348 if (dev->dev_private) {
349 DRM_DEBUG("called when already initialized\n");
350 return -EINVAL;
351 }
352
353 dev_priv = kzalloc(sizeof(drm_r128_private_t), GFP_KERNEL);
354 if (dev_priv == NULL)
355 return -ENOMEM;
356
357 dev_priv->is_pci = init->is_pci;
358
359 if (dev_priv->is_pci && !dev->sg) {
360 DRM_ERROR("PCI GART memory not allocated!\n");
361 dev->dev_private = (void *)dev_priv;
362 r128_do_cleanup_cce(dev);
363 return -EINVAL;
364 }
365
366 dev_priv->usec_timeout = init->usec_timeout;
367 if (dev_priv->usec_timeout < 1 ||
368 dev_priv->usec_timeout > R128_MAX_USEC_TIMEOUT) {
369 DRM_DEBUG("TIMEOUT problem!\n");
370 dev->dev_private = (void *)dev_priv;
371 r128_do_cleanup_cce(dev);
372 return -EINVAL;
373 }
374
375 dev_priv->cce_mode = init->cce_mode;
376
377 /* GH: Simple idle check.
378 */
379 atomic_set(&dev_priv->idle_count, 0);
380
381 /* We don't support anything other than bus-mastering ring mode,
382 * but the ring can be in either AGP or PCI space for the ring
383 * read pointer.
384 */
385 if ((init->cce_mode != R128_PM4_192BM) &&
386 (init->cce_mode != R128_PM4_128BM_64INDBM) &&
387 (init->cce_mode != R128_PM4_64BM_128INDBM) &&
388 (init->cce_mode != R128_PM4_64BM_64VCBM_64INDBM)) {
389 DRM_DEBUG("Bad cce_mode!\n");
390 dev->dev_private = (void *)dev_priv;
391 r128_do_cleanup_cce(dev);
392 return -EINVAL;
393 }
394
395 switch (init->cce_mode) {
396 case R128_PM4_NONPM4:
397 dev_priv->cce_fifo_size = 0;
398 break;
399 case R128_PM4_192PIO:
400 case R128_PM4_192BM:
401 dev_priv->cce_fifo_size = 192;
402 break;
403 case R128_PM4_128PIO_64INDBM:
404 case R128_PM4_128BM_64INDBM:
405 dev_priv->cce_fifo_size = 128;
406 break;
407 case R128_PM4_64PIO_128INDBM:
408 case R128_PM4_64BM_128INDBM:
409 case R128_PM4_64PIO_64VCBM_64INDBM:
410 case R128_PM4_64BM_64VCBM_64INDBM:
411 case R128_PM4_64PIO_64VCPIO_64INDPIO:
412 dev_priv->cce_fifo_size = 64;
413 break;
414 }
415
416 switch (init->fb_bpp) {
417 case 16:
418 dev_priv->color_fmt = R128_DATATYPE_RGB565;
419 break;
420 case 32:
421 default:
422 dev_priv->color_fmt = R128_DATATYPE_ARGB8888;
423 break;
424 }
425 dev_priv->front_offset = init->front_offset;
426 dev_priv->front_pitch = init->front_pitch;
427 dev_priv->back_offset = init->back_offset;
428 dev_priv->back_pitch = init->back_pitch;
429
430 switch (init->depth_bpp) {
431 case 16:
432 dev_priv->depth_fmt = R128_DATATYPE_RGB565;
433 break;
434 case 24:
435 case 32:
436 default:
437 dev_priv->depth_fmt = R128_DATATYPE_ARGB8888;
438 break;
439 }
440 dev_priv->depth_offset = init->depth_offset;
441 dev_priv->depth_pitch = init->depth_pitch;
442 dev_priv->span_offset = init->span_offset;
443
444 dev_priv->front_pitch_offset_c = (((dev_priv->front_pitch / 8) << 21) |
445 (dev_priv->front_offset >> 5));
446 dev_priv->back_pitch_offset_c = (((dev_priv->back_pitch / 8) << 21) |
447 (dev_priv->back_offset >> 5));
448 dev_priv->depth_pitch_offset_c = (((dev_priv->depth_pitch / 8) << 21) |
449 (dev_priv->depth_offset >> 5) |
450 R128_DST_TILE);
451 dev_priv->span_pitch_offset_c = (((dev_priv->depth_pitch / 8) << 21) |
452 (dev_priv->span_offset >> 5));
453
454 dev_priv->sarea = drm_legacy_getsarea(dev);
455 if (!dev_priv->sarea) {
456 DRM_ERROR("could not find sarea!\n");
457 dev->dev_private = (void *)dev_priv;
458 r128_do_cleanup_cce(dev);
459 return -EINVAL;
460 }
461
462 dev_priv->mmio = drm_legacy_findmap(dev, init->mmio_offset);
463 if (!dev_priv->mmio) {
464 DRM_ERROR("could not find mmio region!\n");
465 dev->dev_private = (void *)dev_priv;
466 r128_do_cleanup_cce(dev);
467 return -EINVAL;
468 }
469 dev_priv->cce_ring = drm_legacy_findmap(dev, init->ring_offset);
470 if (!dev_priv->cce_ring) {
471 DRM_ERROR("could not find cce ring region!\n");
472 dev->dev_private = (void *)dev_priv;
473 r128_do_cleanup_cce(dev);
474 return -EINVAL;
475 }
476 dev_priv->ring_rptr = drm_legacy_findmap(dev, init->ring_rptr_offset);
477 if (!dev_priv->ring_rptr) {
478 DRM_ERROR("could not find ring read pointer!\n");
479 dev->dev_private = (void *)dev_priv;
480 r128_do_cleanup_cce(dev);
481 return -EINVAL;
482 }
483 dev->agp_buffer_token = init->buffers_offset;
484 dev->agp_buffer_map = drm_legacy_findmap(dev, init->buffers_offset);
485 if (!dev->agp_buffer_map) {
486 DRM_ERROR("could not find dma buffer region!\n");
487 dev->dev_private = (void *)dev_priv;
488 r128_do_cleanup_cce(dev);
489 return -EINVAL;
490 }
491
492 if (!dev_priv->is_pci) {
493 dev_priv->agp_textures =
494 drm_legacy_findmap(dev, init->agp_textures_offset);
495 if (!dev_priv->agp_textures) {
496 DRM_ERROR("could not find agp texture region!\n");
497 dev->dev_private = (void *)dev_priv;
498 r128_do_cleanup_cce(dev);
499 return -EINVAL;
500 }
501 }
502
503 dev_priv->sarea_priv =
504 (drm_r128_sarea_t *) ((u8 *) dev_priv->sarea->handle +
505 init->sarea_priv_offset);
506
507#if IS_ENABLED(CONFIG_AGP)
508 if (!dev_priv->is_pci) {
509 drm_legacy_ioremap_wc(dev_priv->cce_ring, dev);
510 drm_legacy_ioremap_wc(dev_priv->ring_rptr, dev);
511 drm_legacy_ioremap_wc(dev->agp_buffer_map, dev);
512 if (!dev_priv->cce_ring->handle ||
513 !dev_priv->ring_rptr->handle ||
514 !dev->agp_buffer_map->handle) {
515 DRM_ERROR("Could not ioremap agp regions!\n");
516 dev->dev_private = (void *)dev_priv;
517 r128_do_cleanup_cce(dev);
518 return -ENOMEM;
519 }
520 } else
521#endif
522 {
523 dev_priv->cce_ring->handle =
524 (void *)(unsigned long)dev_priv->cce_ring->offset;
525 dev_priv->ring_rptr->handle =
526 (void *)(unsigned long)dev_priv->ring_rptr->offset;
527 dev->agp_buffer_map->handle =
528 (void *)(unsigned long)dev->agp_buffer_map->offset;
529 }
530
531#if IS_ENABLED(CONFIG_AGP)
532 if (!dev_priv->is_pci)
533 dev_priv->cce_buffers_offset = dev->agp->base;
534 else
535#endif
536 dev_priv->cce_buffers_offset = (unsigned long)dev->sg->virtual;
537
538 dev_priv->ring.start = (u32 *) dev_priv->cce_ring->handle;
539 dev_priv->ring.end = ((u32 *) dev_priv->cce_ring->handle
540 + init->ring_size / sizeof(u32));
541 dev_priv->ring.size = init->ring_size;
542 dev_priv->ring.size_l2qw = order_base_2(init->ring_size / 8);
543
544 dev_priv->ring.tail_mask = (dev_priv->ring.size / sizeof(u32)) - 1;
545
546 dev_priv->ring.high_mark = 128;
547
548 dev_priv->sarea_priv->last_frame = 0;
549 R128_WRITE(R128_LAST_FRAME_REG, dev_priv->sarea_priv->last_frame);
550
551 dev_priv->sarea_priv->last_dispatch = 0;
552 R128_WRITE(R128_LAST_DISPATCH_REG, dev_priv->sarea_priv->last_dispatch);
553
554#if IS_ENABLED(CONFIG_AGP)
555 if (dev_priv->is_pci) {
556#endif
557 dev_priv->gart_info.table_mask = DMA_BIT_MASK(32);
558 dev_priv->gart_info.gart_table_location = DRM_ATI_GART_MAIN;
559 dev_priv->gart_info.table_size = R128_PCIGART_TABLE_SIZE;
560 dev_priv->gart_info.addr = NULL;
561 dev_priv->gart_info.bus_addr = 0;
562 dev_priv->gart_info.gart_reg_if = DRM_ATI_GART_PCI;
563 if (!drm_ati_pcigart_init(dev, &dev_priv->gart_info)) {
564 DRM_ERROR("failed to init PCI GART!\n");
565 dev->dev_private = (void *)dev_priv;
566 r128_do_cleanup_cce(dev);
567 return -ENOMEM;
568 }
569 R128_WRITE(R128_PCI_GART_PAGE, dev_priv->gart_info.bus_addr);
570#if IS_ENABLED(CONFIG_AGP)
571 }
572#endif
573
574 r128_cce_init_ring_buffer(dev, dev_priv);
575 rc = r128_cce_load_microcode(dev_priv);
576
577 dev->dev_private = (void *)dev_priv;
578
579 r128_do_engine_reset(dev);
580
581 if (rc) {
582 DRM_ERROR("Failed to load firmware!\n");
583 r128_do_cleanup_cce(dev);
584 }
585
586 return rc;
587}
588
589int r128_do_cleanup_cce(struct drm_device *dev)
590{
591
592 /* Make sure interrupts are disabled here because the uninstall ioctl
593 * may not have been called from userspace and after dev_private
594 * is freed, it's too late.
595 */
596 if (dev->irq_enabled)
597 drm_irq_uninstall(dev);
598
599 if (dev->dev_private) {
600 drm_r128_private_t *dev_priv = dev->dev_private;
601
602#if IS_ENABLED(CONFIG_AGP)
603 if (!dev_priv->is_pci) {
604 if (dev_priv->cce_ring != NULL)
605 drm_legacy_ioremapfree(dev_priv->cce_ring, dev);
606 if (dev_priv->ring_rptr != NULL)
607 drm_legacy_ioremapfree(dev_priv->ring_rptr, dev);
608 if (dev->agp_buffer_map != NULL) {
609 drm_legacy_ioremapfree(dev->agp_buffer_map, dev);
610 dev->agp_buffer_map = NULL;
611 }
612 } else
613#endif
614 {
615 if (dev_priv->gart_info.bus_addr)
616 if (!drm_ati_pcigart_cleanup(dev,
617 &dev_priv->gart_info))
618 DRM_ERROR
619 ("failed to cleanup PCI GART!\n");
620 }
621
622 kfree(dev->dev_private);
623 dev->dev_private = NULL;
624 }
625
626 return 0;
627}
628
629int r128_cce_init(struct drm_device *dev, void *data, struct drm_file *file_priv)
630{
631 drm_r128_init_t *init = data;
632
633 DRM_DEBUG("\n");
634
635 LOCK_TEST_WITH_RETURN(dev, file_priv);
636
637 switch (init->func) {
638 case R128_INIT_CCE:
639 return r128_do_init_cce(dev, init);
640 case R128_CLEANUP_CCE:
641 return r128_do_cleanup_cce(dev);
642 }
643
644 return -EINVAL;
645}
646
647int r128_cce_start(struct drm_device *dev, void *data, struct drm_file *file_priv)
648{
649 drm_r128_private_t *dev_priv = dev->dev_private;
650 DRM_DEBUG("\n");
651
652 LOCK_TEST_WITH_RETURN(dev, file_priv);
653
654 DEV_INIT_TEST_WITH_RETURN(dev_priv);
655
656 if (dev_priv->cce_running || dev_priv->cce_mode == R128_PM4_NONPM4) {
657 DRM_DEBUG("while CCE running\n");
658 return 0;
659 }
660
661 r128_do_cce_start(dev_priv);
662
663 return 0;
664}
665
666/* Stop the CCE. The engine must have been idled before calling this
667 * routine.
668 */
669int r128_cce_stop(struct drm_device *dev, void *data, struct drm_file *file_priv)
670{
671 drm_r128_private_t *dev_priv = dev->dev_private;
672 drm_r128_cce_stop_t *stop = data;
673 int ret;
674 DRM_DEBUG("\n");
675
676 LOCK_TEST_WITH_RETURN(dev, file_priv);
677
678 DEV_INIT_TEST_WITH_RETURN(dev_priv);
679
680 /* Flush any pending CCE commands. This ensures any outstanding
681 * commands are exectuted by the engine before we turn it off.
682 */
683 if (stop->flush)
684 r128_do_cce_flush(dev_priv);
685
686 /* If we fail to make the engine go idle, we return an error
687 * code so that the DRM ioctl wrapper can try again.
688 */
689 if (stop->idle) {
690 ret = r128_do_cce_idle(dev_priv);
691 if (ret)
692 return ret;
693 }
694
695 /* Finally, we can turn off the CCE. If the engine isn't idle,
696 * we will get some dropped triangles as they won't be fully
697 * rendered before the CCE is shut down.
698 */
699 r128_do_cce_stop(dev_priv);
700
701 /* Reset the engine */
702 r128_do_engine_reset(dev);
703
704 return 0;
705}
706
707/* Just reset the CCE ring. Called as part of an X Server engine reset.
708 */
709int r128_cce_reset(struct drm_device *dev, void *data, struct drm_file *file_priv)
710{
711 drm_r128_private_t *dev_priv = dev->dev_private;
712 DRM_DEBUG("\n");
713
714 LOCK_TEST_WITH_RETURN(dev, file_priv);
715
716 DEV_INIT_TEST_WITH_RETURN(dev_priv);
717
718 r128_do_cce_reset(dev_priv);
719
720 /* The CCE is no longer running after an engine reset */
721 dev_priv->cce_running = 0;
722
723 return 0;
724}
725
726int r128_cce_idle(struct drm_device *dev, void *data, struct drm_file *file_priv)
727{
728 drm_r128_private_t *dev_priv = dev->dev_private;
729 DRM_DEBUG("\n");
730
731 LOCK_TEST_WITH_RETURN(dev, file_priv);
732
733 DEV_INIT_TEST_WITH_RETURN(dev_priv);
734
735 if (dev_priv->cce_running)
736 r128_do_cce_flush(dev_priv);
737
738 return r128_do_cce_idle(dev_priv);
739}
740
741int r128_engine_reset(struct drm_device *dev, void *data, struct drm_file *file_priv)
742{
743 DRM_DEBUG("\n");
744
745 LOCK_TEST_WITH_RETURN(dev, file_priv);
746
747 DEV_INIT_TEST_WITH_RETURN(dev->dev_private);
748
749 return r128_do_engine_reset(dev);
750}
751
752int r128_fullscreen(struct drm_device *dev, void *data, struct drm_file *file_priv)
753{
754 return -EINVAL;
755}
756
757/* ================================================================
758 * Freelist management
759 */
760#define R128_BUFFER_USED 0xffffffff
761#define R128_BUFFER_FREE 0
762
763#if 0
764static int r128_freelist_init(struct drm_device *dev)
765{
766 struct drm_device_dma *dma = dev->dma;
767 drm_r128_private_t *dev_priv = dev->dev_private;
768 struct drm_buf *buf;
769 drm_r128_buf_priv_t *buf_priv;
770 drm_r128_freelist_t *entry;
771 int i;
772
773 dev_priv->head = kzalloc(sizeof(drm_r128_freelist_t), GFP_KERNEL);
774 if (dev_priv->head == NULL)
775 return -ENOMEM;
776
777 dev_priv->head->age = R128_BUFFER_USED;
778
779 for (i = 0; i < dma->buf_count; i++) {
780 buf = dma->buflist[i];
781 buf_priv = buf->dev_private;
782
783 entry = kmalloc(sizeof(drm_r128_freelist_t), GFP_KERNEL);
784 if (!entry)
785 return -ENOMEM;
786
787 entry->age = R128_BUFFER_FREE;
788 entry->buf = buf;
789 entry->prev = dev_priv->head;
790 entry->next = dev_priv->head->next;
791 if (!entry->next)
792 dev_priv->tail = entry;
793
794 buf_priv->discard = 0;
795 buf_priv->dispatched = 0;
796 buf_priv->list_entry = entry;
797
798 dev_priv->head->next = entry;
799
800 if (dev_priv->head->next)
801 dev_priv->head->next->prev = entry;
802 }
803
804 return 0;
805
806}
807#endif
808
809static struct drm_buf *r128_freelist_get(struct drm_device * dev)
810{
811 struct drm_device_dma *dma = dev->dma;
812 drm_r128_private_t *dev_priv = dev->dev_private;
813 drm_r128_buf_priv_t *buf_priv;
814 struct drm_buf *buf;
815 int i, t;
816
817 /* FIXME: Optimize -- use freelist code */
818
819 for (i = 0; i < dma->buf_count; i++) {
820 buf = dma->buflist[i];
821 buf_priv = buf->dev_private;
822 if (!buf->file_priv)
823 return buf;
824 }
825
826 for (t = 0; t < dev_priv->usec_timeout; t++) {
827 u32 done_age = R128_READ(R128_LAST_DISPATCH_REG);
828
829 for (i = 0; i < dma->buf_count; i++) {
830 buf = dma->buflist[i];
831 buf_priv = buf->dev_private;
832 if (buf->pending && buf_priv->age <= done_age) {
833 /* The buffer has been processed, so it
834 * can now be used.
835 */
836 buf->pending = 0;
837 return buf;
838 }
839 }
840 DRM_UDELAY(1);
841 }
842
843 DRM_DEBUG("returning NULL!\n");
844 return NULL;
845}
846
847void r128_freelist_reset(struct drm_device *dev)
848{
849 struct drm_device_dma *dma = dev->dma;
850 int i;
851
852 for (i = 0; i < dma->buf_count; i++) {
853 struct drm_buf *buf = dma->buflist[i];
854 drm_r128_buf_priv_t *buf_priv = buf->dev_private;
855 buf_priv->age = 0;
856 }
857}
858
859/* ================================================================
860 * CCE command submission
861 */
862
863int r128_wait_ring(drm_r128_private_t *dev_priv, int n)
864{
865 drm_r128_ring_buffer_t *ring = &dev_priv->ring;
866 int i;
867
868 for (i = 0; i < dev_priv->usec_timeout; i++) {
869 r128_update_ring_snapshot(dev_priv);
870 if (ring->space >= n)
871 return 0;
872 DRM_UDELAY(1);
873 }
874
875 /* FIXME: This is being ignored... */
876 DRM_ERROR("failed!\n");
877 return -EBUSY;
878}
879
880static int r128_cce_get_buffers(struct drm_device *dev,
881 struct drm_file *file_priv,
882 struct drm_dma *d)
883{
884 int i;
885 struct drm_buf *buf;
886
887 for (i = d->granted_count; i < d->request_count; i++) {
888 buf = r128_freelist_get(dev);
889 if (!buf)
890 return -EAGAIN;
891
892 buf->file_priv = file_priv;
893
894 if (copy_to_user(&d->request_indices[i], &buf->idx,
895 sizeof(buf->idx)))
896 return -EFAULT;
897 if (copy_to_user(&d->request_sizes[i], &buf->total,
898 sizeof(buf->total)))
899 return -EFAULT;
900
901 d->granted_count++;
902 }
903 return 0;
904}
905
906int r128_cce_buffers(struct drm_device *dev, void *data, struct drm_file *file_priv)
907{
908 struct drm_device_dma *dma = dev->dma;
909 int ret = 0;
910 struct drm_dma *d = data;
911
912 LOCK_TEST_WITH_RETURN(dev, file_priv);
913
914 /* Please don't send us buffers.
915 */
916 if (d->send_count != 0) {
917 DRM_ERROR("Process %d trying to send %d buffers via drmDMA\n",
918 DRM_CURRENTPID, d->send_count);
919 return -EINVAL;
920 }
921
922 /* We'll send you buffers.
923 */
924 if (d->request_count < 0 || d->request_count > dma->buf_count) {
925 DRM_ERROR("Process %d trying to get %d buffers (of %d max)\n",
926 DRM_CURRENTPID, d->request_count, dma->buf_count);
927 return -EINVAL;
928 }
929
930 d->granted_count = 0;
931
932 if (d->request_count)
933 ret = r128_cce_get_buffers(dev, file_priv, d);
934
935 return ret;
936}