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fb1d9738 JB |
1 | /************************************************************************** |
2 | * | |
3 | * Copyright © 2009 VMware, Inc., Palo Alto, CA., USA | |
4 | * All Rights Reserved. | |
5 | * | |
6 | * Permission is hereby granted, free of charge, to any person obtaining a | |
7 | * copy of this software and associated documentation files (the | |
8 | * "Software"), to deal in the Software without restriction, including | |
9 | * without limitation the rights to use, copy, modify, merge, publish, | |
10 | * distribute, sub license, and/or sell copies of the Software, and to | |
11 | * permit persons to whom the Software is furnished to do so, subject to | |
12 | * the following conditions: | |
13 | * | |
14 | * The above copyright notice and this permission notice (including the | |
15 | * next paragraph) shall be included in all copies or substantial portions | |
16 | * of the Software. | |
17 | * | |
18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
19 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
20 | * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL | |
21 | * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, | |
22 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR | |
23 | * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE | |
24 | * USE OR OTHER DEALINGS IN THE SOFTWARE. | |
25 | * | |
26 | **************************************************************************/ | |
27 | ||
28 | #include "vmwgfx_drv.h" | |
29 | #include "drmP.h" | |
30 | #include "ttm/ttm_placement.h" | |
31 | ||
32 | int vmw_fifo_init(struct vmw_private *dev_priv, struct vmw_fifo_state *fifo) | |
33 | { | |
34 | __le32 __iomem *fifo_mem = dev_priv->mmio_virt; | |
35 | uint32_t max; | |
36 | uint32_t min; | |
37 | uint32_t dummy; | |
38 | int ret; | |
39 | ||
40 | fifo->static_buffer_size = VMWGFX_FIFO_STATIC_SIZE; | |
41 | fifo->static_buffer = vmalloc(fifo->static_buffer_size); | |
42 | if (unlikely(fifo->static_buffer == NULL)) | |
43 | return -ENOMEM; | |
44 | ||
45 | fifo->last_buffer_size = VMWGFX_FIFO_STATIC_SIZE; | |
46 | fifo->last_data_size = 0; | |
47 | fifo->last_buffer_add = false; | |
48 | fifo->last_buffer = vmalloc(fifo->last_buffer_size); | |
49 | if (unlikely(fifo->last_buffer == NULL)) { | |
50 | ret = -ENOMEM; | |
51 | goto out_err; | |
52 | } | |
53 | ||
54 | fifo->dynamic_buffer = NULL; | |
55 | fifo->reserved_size = 0; | |
56 | fifo->using_bounce_buffer = false; | |
57 | ||
58 | init_rwsem(&fifo->rwsem); | |
59 | ||
60 | /* | |
61 | * Allow mapping the first page read-only to user-space. | |
62 | */ | |
63 | ||
64 | DRM_INFO("width %d\n", vmw_read(dev_priv, SVGA_REG_WIDTH)); | |
65 | DRM_INFO("height %d\n", vmw_read(dev_priv, SVGA_REG_HEIGHT)); | |
66 | DRM_INFO("bpp %d\n", vmw_read(dev_priv, SVGA_REG_BITS_PER_PIXEL)); | |
67 | ||
68 | mutex_lock(&dev_priv->hw_mutex); | |
69 | dev_priv->enable_state = vmw_read(dev_priv, SVGA_REG_ENABLE); | |
70 | dev_priv->config_done_state = vmw_read(dev_priv, SVGA_REG_CONFIG_DONE); | |
71 | vmw_write(dev_priv, SVGA_REG_ENABLE, 1); | |
72 | ||
73 | min = 4; | |
74 | if (dev_priv->capabilities & SVGA_CAP_EXTENDED_FIFO) | |
75 | min = vmw_read(dev_priv, SVGA_REG_MEM_REGS); | |
76 | min <<= 2; | |
77 | ||
78 | if (min < PAGE_SIZE) | |
79 | min = PAGE_SIZE; | |
80 | ||
81 | iowrite32(min, fifo_mem + SVGA_FIFO_MIN); | |
82 | iowrite32(dev_priv->mmio_size, fifo_mem + SVGA_FIFO_MAX); | |
83 | wmb(); | |
84 | iowrite32(min, fifo_mem + SVGA_FIFO_NEXT_CMD); | |
85 | iowrite32(min, fifo_mem + SVGA_FIFO_STOP); | |
86 | iowrite32(0, fifo_mem + SVGA_FIFO_BUSY); | |
87 | mb(); | |
88 | ||
89 | vmw_write(dev_priv, SVGA_REG_CONFIG_DONE, 1); | |
90 | mutex_unlock(&dev_priv->hw_mutex); | |
91 | ||
92 | max = ioread32(fifo_mem + SVGA_FIFO_MAX); | |
93 | min = ioread32(fifo_mem + SVGA_FIFO_MIN); | |
94 | fifo->capabilities = ioread32(fifo_mem + SVGA_FIFO_CAPABILITIES); | |
95 | ||
96 | DRM_INFO("Fifo max 0x%08x min 0x%08x cap 0x%08x\n", | |
97 | (unsigned int) max, | |
98 | (unsigned int) min, | |
99 | (unsigned int) fifo->capabilities); | |
100 | ||
7704befb | 101 | dev_priv->fence_seq = dev_priv->last_read_sequence; |
fb1d9738 JB |
102 | iowrite32(dev_priv->last_read_sequence, fifo_mem + SVGA_FIFO_FENCE); |
103 | ||
104 | return vmw_fifo_send_fence(dev_priv, &dummy); | |
105 | out_err: | |
106 | vfree(fifo->static_buffer); | |
107 | fifo->static_buffer = NULL; | |
108 | return ret; | |
109 | } | |
110 | ||
111 | void vmw_fifo_ping_host(struct vmw_private *dev_priv, uint32_t reason) | |
112 | { | |
113 | __le32 __iomem *fifo_mem = dev_priv->mmio_virt; | |
114 | ||
115 | mutex_lock(&dev_priv->hw_mutex); | |
116 | ||
117 | if (unlikely(ioread32(fifo_mem + SVGA_FIFO_BUSY) == 0)) { | |
118 | iowrite32(1, fifo_mem + SVGA_FIFO_BUSY); | |
119 | vmw_write(dev_priv, SVGA_REG_SYNC, reason); | |
120 | } | |
121 | ||
122 | mutex_unlock(&dev_priv->hw_mutex); | |
123 | } | |
124 | ||
125 | void vmw_fifo_release(struct vmw_private *dev_priv, struct vmw_fifo_state *fifo) | |
126 | { | |
127 | __le32 __iomem *fifo_mem = dev_priv->mmio_virt; | |
128 | ||
129 | mutex_lock(&dev_priv->hw_mutex); | |
130 | ||
131 | while (vmw_read(dev_priv, SVGA_REG_BUSY) != 0) | |
132 | vmw_write(dev_priv, SVGA_REG_SYNC, SVGA_SYNC_GENERIC); | |
133 | ||
134 | dev_priv->last_read_sequence = ioread32(fifo_mem + SVGA_FIFO_FENCE); | |
135 | ||
136 | vmw_write(dev_priv, SVGA_REG_CONFIG_DONE, | |
137 | dev_priv->config_done_state); | |
138 | vmw_write(dev_priv, SVGA_REG_ENABLE, | |
139 | dev_priv->enable_state); | |
140 | ||
141 | mutex_unlock(&dev_priv->hw_mutex); | |
142 | ||
143 | if (likely(fifo->last_buffer != NULL)) { | |
144 | vfree(fifo->last_buffer); | |
145 | fifo->last_buffer = NULL; | |
146 | } | |
147 | ||
148 | if (likely(fifo->static_buffer != NULL)) { | |
149 | vfree(fifo->static_buffer); | |
150 | fifo->static_buffer = NULL; | |
151 | } | |
152 | ||
153 | if (likely(fifo->dynamic_buffer != NULL)) { | |
154 | vfree(fifo->dynamic_buffer); | |
155 | fifo->dynamic_buffer = NULL; | |
156 | } | |
157 | } | |
158 | ||
159 | static bool vmw_fifo_is_full(struct vmw_private *dev_priv, uint32_t bytes) | |
160 | { | |
161 | __le32 __iomem *fifo_mem = dev_priv->mmio_virt; | |
162 | uint32_t max = ioread32(fifo_mem + SVGA_FIFO_MAX); | |
163 | uint32_t next_cmd = ioread32(fifo_mem + SVGA_FIFO_NEXT_CMD); | |
164 | uint32_t min = ioread32(fifo_mem + SVGA_FIFO_MIN); | |
165 | uint32_t stop = ioread32(fifo_mem + SVGA_FIFO_STOP); | |
166 | ||
167 | return ((max - next_cmd) + (stop - min) <= bytes); | |
168 | } | |
169 | ||
170 | static int vmw_fifo_wait_noirq(struct vmw_private *dev_priv, | |
171 | uint32_t bytes, bool interruptible, | |
172 | unsigned long timeout) | |
173 | { | |
174 | int ret = 0; | |
175 | unsigned long end_jiffies = jiffies + timeout; | |
176 | DEFINE_WAIT(__wait); | |
177 | ||
178 | DRM_INFO("Fifo wait noirq.\n"); | |
179 | ||
180 | for (;;) { | |
181 | prepare_to_wait(&dev_priv->fifo_queue, &__wait, | |
182 | (interruptible) ? | |
183 | TASK_INTERRUPTIBLE : TASK_UNINTERRUPTIBLE); | |
184 | if (!vmw_fifo_is_full(dev_priv, bytes)) | |
185 | break; | |
186 | if (time_after_eq(jiffies, end_jiffies)) { | |
187 | ret = -EBUSY; | |
188 | DRM_ERROR("SVGA device lockup.\n"); | |
189 | break; | |
190 | } | |
191 | schedule_timeout(1); | |
192 | if (interruptible && signal_pending(current)) { | |
3d3a5b32 | 193 | ret = -ERESTARTSYS; |
fb1d9738 JB |
194 | break; |
195 | } | |
196 | } | |
197 | finish_wait(&dev_priv->fifo_queue, &__wait); | |
198 | wake_up_all(&dev_priv->fifo_queue); | |
199 | DRM_INFO("Fifo noirq exit.\n"); | |
200 | return ret; | |
201 | } | |
202 | ||
203 | static int vmw_fifo_wait(struct vmw_private *dev_priv, | |
204 | uint32_t bytes, bool interruptible, | |
205 | unsigned long timeout) | |
206 | { | |
207 | long ret = 1L; | |
208 | unsigned long irq_flags; | |
209 | ||
210 | if (likely(!vmw_fifo_is_full(dev_priv, bytes))) | |
211 | return 0; | |
212 | ||
213 | vmw_fifo_ping_host(dev_priv, SVGA_SYNC_FIFOFULL); | |
214 | if (!(dev_priv->capabilities & SVGA_CAP_IRQMASK)) | |
215 | return vmw_fifo_wait_noirq(dev_priv, bytes, | |
216 | interruptible, timeout); | |
217 | ||
218 | mutex_lock(&dev_priv->hw_mutex); | |
219 | if (atomic_add_return(1, &dev_priv->fifo_queue_waiters) > 0) { | |
220 | spin_lock_irqsave(&dev_priv->irq_lock, irq_flags); | |
221 | outl(SVGA_IRQFLAG_FIFO_PROGRESS, | |
222 | dev_priv->io_start + VMWGFX_IRQSTATUS_PORT); | |
223 | vmw_write(dev_priv, SVGA_REG_IRQMASK, | |
224 | vmw_read(dev_priv, SVGA_REG_IRQMASK) | | |
225 | SVGA_IRQFLAG_FIFO_PROGRESS); | |
226 | spin_unlock_irqrestore(&dev_priv->irq_lock, irq_flags); | |
227 | } | |
228 | mutex_unlock(&dev_priv->hw_mutex); | |
229 | ||
230 | if (interruptible) | |
231 | ret = wait_event_interruptible_timeout | |
232 | (dev_priv->fifo_queue, | |
233 | !vmw_fifo_is_full(dev_priv, bytes), timeout); | |
234 | else | |
235 | ret = wait_event_timeout | |
236 | (dev_priv->fifo_queue, | |
237 | !vmw_fifo_is_full(dev_priv, bytes), timeout); | |
238 | ||
3d3a5b32 | 239 | if (unlikely(ret == 0)) |
fb1d9738 JB |
240 | ret = -EBUSY; |
241 | else if (likely(ret > 0)) | |
242 | ret = 0; | |
243 | ||
244 | mutex_lock(&dev_priv->hw_mutex); | |
245 | if (atomic_dec_and_test(&dev_priv->fifo_queue_waiters)) { | |
246 | spin_lock_irqsave(&dev_priv->irq_lock, irq_flags); | |
247 | vmw_write(dev_priv, SVGA_REG_IRQMASK, | |
248 | vmw_read(dev_priv, SVGA_REG_IRQMASK) & | |
249 | ~SVGA_IRQFLAG_FIFO_PROGRESS); | |
250 | spin_unlock_irqrestore(&dev_priv->irq_lock, irq_flags); | |
251 | } | |
252 | mutex_unlock(&dev_priv->hw_mutex); | |
253 | ||
254 | return ret; | |
255 | } | |
256 | ||
257 | void *vmw_fifo_reserve(struct vmw_private *dev_priv, uint32_t bytes) | |
258 | { | |
259 | struct vmw_fifo_state *fifo_state = &dev_priv->fifo; | |
260 | __le32 __iomem *fifo_mem = dev_priv->mmio_virt; | |
261 | uint32_t max; | |
262 | uint32_t min; | |
263 | uint32_t next_cmd; | |
264 | uint32_t reserveable = fifo_state->capabilities & SVGA_FIFO_CAP_RESERVE; | |
265 | int ret; | |
266 | ||
267 | down_write(&fifo_state->rwsem); | |
268 | max = ioread32(fifo_mem + SVGA_FIFO_MAX); | |
269 | min = ioread32(fifo_mem + SVGA_FIFO_MIN); | |
270 | next_cmd = ioread32(fifo_mem + SVGA_FIFO_NEXT_CMD); | |
271 | ||
272 | if (unlikely(bytes >= (max - min))) | |
273 | goto out_err; | |
274 | ||
275 | BUG_ON(fifo_state->reserved_size != 0); | |
276 | BUG_ON(fifo_state->dynamic_buffer != NULL); | |
277 | ||
278 | fifo_state->reserved_size = bytes; | |
279 | ||
280 | while (1) { | |
281 | uint32_t stop = ioread32(fifo_mem + SVGA_FIFO_STOP); | |
282 | bool need_bounce = false; | |
283 | bool reserve_in_place = false; | |
284 | ||
285 | if (next_cmd >= stop) { | |
286 | if (likely((next_cmd + bytes < max || | |
287 | (next_cmd + bytes == max && stop > min)))) | |
288 | reserve_in_place = true; | |
289 | ||
290 | else if (vmw_fifo_is_full(dev_priv, bytes)) { | |
291 | ret = vmw_fifo_wait(dev_priv, bytes, | |
292 | false, 3 * HZ); | |
293 | if (unlikely(ret != 0)) | |
294 | goto out_err; | |
295 | } else | |
296 | need_bounce = true; | |
297 | ||
298 | } else { | |
299 | ||
300 | if (likely((next_cmd + bytes < stop))) | |
301 | reserve_in_place = true; | |
302 | else { | |
303 | ret = vmw_fifo_wait(dev_priv, bytes, | |
304 | false, 3 * HZ); | |
305 | if (unlikely(ret != 0)) | |
306 | goto out_err; | |
307 | } | |
308 | } | |
309 | ||
310 | if (reserve_in_place) { | |
311 | if (reserveable || bytes <= sizeof(uint32_t)) { | |
312 | fifo_state->using_bounce_buffer = false; | |
313 | ||
314 | if (reserveable) | |
315 | iowrite32(bytes, fifo_mem + | |
316 | SVGA_FIFO_RESERVED); | |
317 | return fifo_mem + (next_cmd >> 2); | |
318 | } else { | |
319 | need_bounce = true; | |
320 | } | |
321 | } | |
322 | ||
323 | if (need_bounce) { | |
324 | fifo_state->using_bounce_buffer = true; | |
325 | if (bytes < fifo_state->static_buffer_size) | |
326 | return fifo_state->static_buffer; | |
327 | else { | |
328 | fifo_state->dynamic_buffer = vmalloc(bytes); | |
329 | return fifo_state->dynamic_buffer; | |
330 | } | |
331 | } | |
332 | } | |
333 | out_err: | |
334 | fifo_state->reserved_size = 0; | |
335 | up_write(&fifo_state->rwsem); | |
336 | return NULL; | |
337 | } | |
338 | ||
339 | static void vmw_fifo_res_copy(struct vmw_fifo_state *fifo_state, | |
340 | __le32 __iomem *fifo_mem, | |
341 | uint32_t next_cmd, | |
342 | uint32_t max, uint32_t min, uint32_t bytes) | |
343 | { | |
344 | uint32_t chunk_size = max - next_cmd; | |
345 | uint32_t rest; | |
346 | uint32_t *buffer = (fifo_state->dynamic_buffer != NULL) ? | |
347 | fifo_state->dynamic_buffer : fifo_state->static_buffer; | |
348 | ||
349 | if (bytes < chunk_size) | |
350 | chunk_size = bytes; | |
351 | ||
352 | iowrite32(bytes, fifo_mem + SVGA_FIFO_RESERVED); | |
353 | mb(); | |
354 | memcpy_toio(fifo_mem + (next_cmd >> 2), buffer, chunk_size); | |
355 | rest = bytes - chunk_size; | |
356 | if (rest) | |
357 | memcpy_toio(fifo_mem + (min >> 2), buffer + (chunk_size >> 2), | |
358 | rest); | |
359 | } | |
360 | ||
361 | static void vmw_fifo_slow_copy(struct vmw_fifo_state *fifo_state, | |
362 | __le32 __iomem *fifo_mem, | |
363 | uint32_t next_cmd, | |
364 | uint32_t max, uint32_t min, uint32_t bytes) | |
365 | { | |
366 | uint32_t *buffer = (fifo_state->dynamic_buffer != NULL) ? | |
367 | fifo_state->dynamic_buffer : fifo_state->static_buffer; | |
368 | ||
369 | while (bytes > 0) { | |
370 | iowrite32(*buffer++, fifo_mem + (next_cmd >> 2)); | |
371 | next_cmd += sizeof(uint32_t); | |
372 | if (unlikely(next_cmd == max)) | |
373 | next_cmd = min; | |
374 | mb(); | |
375 | iowrite32(next_cmd, fifo_mem + SVGA_FIFO_NEXT_CMD); | |
376 | mb(); | |
377 | bytes -= sizeof(uint32_t); | |
378 | } | |
379 | } | |
380 | ||
381 | void vmw_fifo_commit(struct vmw_private *dev_priv, uint32_t bytes) | |
382 | { | |
383 | struct vmw_fifo_state *fifo_state = &dev_priv->fifo; | |
384 | __le32 __iomem *fifo_mem = dev_priv->mmio_virt; | |
385 | uint32_t next_cmd = ioread32(fifo_mem + SVGA_FIFO_NEXT_CMD); | |
386 | uint32_t max = ioread32(fifo_mem + SVGA_FIFO_MAX); | |
387 | uint32_t min = ioread32(fifo_mem + SVGA_FIFO_MIN); | |
388 | bool reserveable = fifo_state->capabilities & SVGA_FIFO_CAP_RESERVE; | |
389 | ||
390 | BUG_ON((bytes & 3) != 0); | |
391 | BUG_ON(bytes > fifo_state->reserved_size); | |
392 | ||
393 | fifo_state->reserved_size = 0; | |
394 | ||
395 | if (fifo_state->using_bounce_buffer) { | |
396 | if (reserveable) | |
397 | vmw_fifo_res_copy(fifo_state, fifo_mem, | |
398 | next_cmd, max, min, bytes); | |
399 | else | |
400 | vmw_fifo_slow_copy(fifo_state, fifo_mem, | |
401 | next_cmd, max, min, bytes); | |
402 | ||
403 | if (fifo_state->dynamic_buffer) { | |
404 | vfree(fifo_state->dynamic_buffer); | |
405 | fifo_state->dynamic_buffer = NULL; | |
406 | } | |
407 | ||
408 | } | |
409 | ||
410 | if (fifo_state->using_bounce_buffer || reserveable) { | |
411 | next_cmd += bytes; | |
412 | if (next_cmd >= max) | |
413 | next_cmd -= max - min; | |
414 | mb(); | |
415 | iowrite32(next_cmd, fifo_mem + SVGA_FIFO_NEXT_CMD); | |
416 | } | |
417 | ||
418 | if (reserveable) | |
419 | iowrite32(0, fifo_mem + SVGA_FIFO_RESERVED); | |
420 | mb(); | |
421 | vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC); | |
422 | up_write(&fifo_state->rwsem); | |
423 | } | |
424 | ||
425 | int vmw_fifo_send_fence(struct vmw_private *dev_priv, uint32_t *sequence) | |
426 | { | |
427 | struct vmw_fifo_state *fifo_state = &dev_priv->fifo; | |
428 | struct svga_fifo_cmd_fence *cmd_fence; | |
429 | void *fm; | |
430 | int ret = 0; | |
431 | uint32_t bytes = sizeof(__le32) + sizeof(*cmd_fence); | |
432 | ||
433 | fm = vmw_fifo_reserve(dev_priv, bytes); | |
434 | if (unlikely(fm == NULL)) { | |
435 | down_write(&fifo_state->rwsem); | |
436 | *sequence = dev_priv->fence_seq; | |
437 | up_write(&fifo_state->rwsem); | |
438 | ret = -ENOMEM; | |
439 | (void)vmw_fallback_wait(dev_priv, false, true, *sequence, | |
440 | false, 3*HZ); | |
441 | goto out_err; | |
442 | } | |
443 | ||
444 | do { | |
445 | *sequence = dev_priv->fence_seq++; | |
446 | } while (*sequence == 0); | |
447 | ||
448 | if (!(fifo_state->capabilities & SVGA_FIFO_CAP_FENCE)) { | |
449 | ||
450 | /* | |
451 | * Don't request hardware to send a fence. The | |
452 | * waiting code in vmwgfx_irq.c will emulate this. | |
453 | */ | |
454 | ||
455 | vmw_fifo_commit(dev_priv, 0); | |
456 | return 0; | |
457 | } | |
458 | ||
459 | *(__le32 *) fm = cpu_to_le32(SVGA_CMD_FENCE); | |
460 | cmd_fence = (struct svga_fifo_cmd_fence *) | |
461 | ((unsigned long)fm + sizeof(__le32)); | |
462 | ||
463 | iowrite32(*sequence, &cmd_fence->fence); | |
464 | fifo_state->last_buffer_add = true; | |
465 | vmw_fifo_commit(dev_priv, bytes); | |
466 | fifo_state->last_buffer_add = false; | |
467 | ||
468 | out_err: | |
469 | return ret; | |
470 | } | |
471 | ||
472 | /** | |
473 | * Map the first page of the FIFO read-only to user-space. | |
474 | */ | |
475 | ||
476 | static int vmw_fifo_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) | |
477 | { | |
478 | int ret; | |
479 | unsigned long address = (unsigned long)vmf->virtual_address; | |
480 | ||
481 | if (address != vma->vm_start) | |
482 | return VM_FAULT_SIGBUS; | |
483 | ||
484 | ret = vm_insert_pfn(vma, address, vma->vm_pgoff); | |
485 | if (likely(ret == -EBUSY || ret == 0)) | |
486 | return VM_FAULT_NOPAGE; | |
487 | else if (ret == -ENOMEM) | |
488 | return VM_FAULT_OOM; | |
489 | ||
490 | return VM_FAULT_SIGBUS; | |
491 | } | |
492 | ||
493 | static struct vm_operations_struct vmw_fifo_vm_ops = { | |
494 | .fault = vmw_fifo_vm_fault, | |
495 | .open = NULL, | |
496 | .close = NULL | |
497 | }; | |
498 | ||
499 | int vmw_fifo_mmap(struct file *filp, struct vm_area_struct *vma) | |
500 | { | |
501 | struct drm_file *file_priv; | |
502 | struct vmw_private *dev_priv; | |
503 | ||
504 | file_priv = (struct drm_file *)filp->private_data; | |
505 | dev_priv = vmw_priv(file_priv->minor->dev); | |
506 | ||
507 | if (vma->vm_pgoff != (dev_priv->mmio_start >> PAGE_SHIFT) || | |
508 | (vma->vm_end - vma->vm_start) != PAGE_SIZE) | |
509 | return -EINVAL; | |
510 | ||
511 | vma->vm_flags &= ~(VM_WRITE | VM_MAYWRITE); | |
512 | vma->vm_flags |= VM_IO | VM_PFNMAP | VM_DONTEXPAND | VM_SHARED; | |
513 | vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); | |
514 | vma->vm_page_prot = ttm_io_prot(TTM_PL_FLAG_UNCACHED, | |
515 | vma->vm_page_prot); | |
516 | vma->vm_ops = &vmw_fifo_vm_ops; | |
517 | return 0; | |
518 | } |