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
45 MODULE_FIRMWARE(FIRMWARE_NAME);
46
R128_READ_PLL(struct drm_device * dev,int addr)47 static 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
r128_status(drm_r128_private_t * dev_priv)56 static 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
r128_do_pixcache_flush(drm_r128_private_t * dev_priv)77 static 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
r128_do_wait_for_fifo(drm_r128_private_t * dev_priv,int entries)97 static 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
r128_do_wait_for_idle(drm_r128_private_t * dev_priv)114 static 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 */
r128_cce_load_microcode(drm_r128_private_t * dev_priv)141 static 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
181 out_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 */
r128_do_cce_flush(drm_r128_private_t * dev_priv)190 static 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 */
r128_do_cce_idle(drm_r128_private_t * dev_priv)200 int 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 */
r128_do_cce_start(drm_r128_private_t * dev_priv)226 static 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 */
r128_do_cce_reset(drm_r128_private_t * dev_priv)243 static 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 */
r128_do_cce_stop(drm_r128_private_t * dev_priv)254 static 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 */
r128_do_engine_reset(struct drm_device * dev)265 static 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
r128_cce_init_ring_buffer(struct drm_device * dev,drm_r128_private_t * dev_priv)302 static 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
r128_do_init_cce(struct drm_device * dev,drm_r128_init_t * init)341 static 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
r128_do_cleanup_cce(struct drm_device * dev)589 int 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
r128_cce_init(struct drm_device * dev,void * data,struct drm_file * file_priv)629 int 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
r128_cce_start(struct drm_device * dev,void * data,struct drm_file * file_priv)647 int 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 */
r128_cce_stop(struct drm_device * dev,void * data,struct drm_file * file_priv)669 int 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 */
r128_cce_reset(struct drm_device * dev,void * data,struct drm_file * file_priv)709 int 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
r128_cce_idle(struct drm_device * dev,void * data,struct drm_file * file_priv)726 int 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
r128_engine_reset(struct drm_device * dev,void * data,struct drm_file * file_priv)741 int 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
r128_fullscreen(struct drm_device * dev,void * data,struct drm_file * file_priv)752 int 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
764 static 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
r128_freelist_get(struct drm_device * dev)809 static 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
r128_freelist_reset(struct drm_device * dev)847 void 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
r128_wait_ring(drm_r128_private_t * dev_priv,int n)863 int 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
r128_cce_get_buffers(struct drm_device * dev,struct drm_file * file_priv,struct drm_dma * d)880 static 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
r128_cce_buffers(struct drm_device * dev,void * data,struct drm_file * file_priv)906 int 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 }
937
