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cd5351f4 | 1 | /* |
8bb0daff | 2 | * drivers/gpu/drm/omapdrm/omap_gem.c |
cd5351f4 RC |
3 | * |
4 | * Copyright (C) 2011 Texas Instruments | |
5 | * Author: Rob Clark <rob.clark@linaro.org> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify it | |
8 | * under the terms of the GNU General Public License version 2 as published by | |
9 | * the Free Software Foundation. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
14 | * more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License along with | |
17 | * this program. If not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
2d802453 | 20 | #include <linux/seq_file.h> |
cd5351f4 | 21 | #include <linux/shmem_fs.h> |
2d278f54 | 22 | #include <linux/spinlock.h> |
01c8f1c4 | 23 | #include <linux/pfn_t.h> |
2d278f54 | 24 | |
0de23977 | 25 | #include <drm/drm_vma_manager.h> |
cd5351f4 RC |
26 | |
27 | #include "omap_drv.h" | |
f7f9f453 | 28 | #include "omap_dmm_tiler.h" |
cd5351f4 | 29 | |
cd5351f4 RC |
30 | /* |
31 | * GEM buffer object implementation. | |
32 | */ | |
33 | ||
cd5351f4 | 34 | /* note: we use upper 8 bits of flags for driver-internal flags: */ |
cdb0381d LP |
35 | #define OMAP_BO_MEM_DMA_API 0x01000000 /* memory allocated with the dma_alloc_* API */ |
36 | #define OMAP_BO_MEM_SHMEM 0x02000000 /* memory allocated through shmem backing */ | |
b22e6690 | 37 | #define OMAP_BO_MEM_DMABUF 0x08000000 /* memory imported from a dmabuf */ |
cd5351f4 | 38 | |
cd5351f4 RC |
39 | struct omap_gem_object { |
40 | struct drm_gem_object base; | |
41 | ||
f6b6036e RC |
42 | struct list_head mm_list; |
43 | ||
cd5351f4 RC |
44 | uint32_t flags; |
45 | ||
f7f9f453 RC |
46 | /** width/height for tiled formats (rounded up to slot boundaries) */ |
47 | uint16_t width, height; | |
48 | ||
a6a91827 RC |
49 | /** roll applied when mapping to DMM */ |
50 | uint32_t roll; | |
51 | ||
cd5351f4 | 52 | /** |
b22e6690 | 53 | * paddr contains the buffer DMA address. It is valid for |
cd5351f4 | 54 | * |
b22e6690 LP |
55 | * - buffers allocated through the DMA mapping API (with the |
56 | * OMAP_BO_MEM_DMA_API flag set) | |
57 | * | |
58 | * - buffers imported from dmabuf (with the OMAP_BO_MEM_DMABUF flag set) | |
59 | * if they are physically contiguous (when sgt->orig_nents == 1) | |
60 | * | |
61 | * - buffers mapped through the TILER when paddr_cnt is not zero, in | |
62 | * which case the DMA address points to the TILER aperture | |
63 | * | |
64 | * Physically contiguous buffers have their DMA address equal to the | |
65 | * physical address as we don't remap those buffers through the TILER. | |
66 | * | |
67 | * Buffers mapped to the TILER have their DMA address pointing to the | |
68 | * TILER aperture. As TILER mappings are refcounted (through paddr_cnt) | |
69 | * the DMA address must be accessed through omap_get_get_paddr() to | |
70 | * ensure that the mapping won't disappear unexpectedly. References must | |
71 | * be released with omap_gem_put_paddr(). | |
cd5351f4 RC |
72 | */ |
73 | dma_addr_t paddr; | |
74 | ||
f7f9f453 RC |
75 | /** |
76 | * # of users of paddr | |
77 | */ | |
78 | uint32_t paddr_cnt; | |
79 | ||
b22e6690 LP |
80 | /** |
81 | * If the buffer has been imported from a dmabuf the OMAP_DB_DMABUF flag | |
82 | * is set and the sgt field is valid. | |
83 | */ | |
84 | struct sg_table *sgt; | |
85 | ||
f7f9f453 RC |
86 | /** |
87 | * tiler block used when buffer is remapped in DMM/TILER. | |
88 | */ | |
89 | struct tiler_block *block; | |
90 | ||
cd5351f4 RC |
91 | /** |
92 | * Array of backing pages, if allocated. Note that pages are never | |
93 | * allocated for buffers originally allocated from contiguous memory | |
94 | */ | |
95 | struct page **pages; | |
96 | ||
f3bc9d24 RC |
97 | /** addresses corresponding to pages in above array */ |
98 | dma_addr_t *addrs; | |
99 | ||
cd5351f4 RC |
100 | /** |
101 | * Virtual address, if mapped. | |
102 | */ | |
103 | void *vaddr; | |
104 | ||
105 | /** | |
106 | * sync-object allocated on demand (if needed) | |
107 | * | |
108 | * Per-buffer sync-object for tracking pending and completed hw/dma | |
3f50effd | 109 | * read and write operations. |
cd5351f4 RC |
110 | */ |
111 | struct { | |
112 | uint32_t write_pending; | |
113 | uint32_t write_complete; | |
114 | uint32_t read_pending; | |
115 | uint32_t read_complete; | |
116 | } *sync; | |
117 | }; | |
118 | ||
7ef93b0a | 119 | #define to_omap_bo(x) container_of(x, struct omap_gem_object, base) |
c5b1247b | 120 | |
f7f9f453 RC |
121 | /* To deal with userspace mmap'ings of 2d tiled buffers, which (a) are |
122 | * not necessarily pinned in TILER all the time, and (b) when they are | |
123 | * they are not necessarily page aligned, we reserve one or more small | |
124 | * regions in each of the 2d containers to use as a user-GART where we | |
125 | * can create a second page-aligned mapping of parts of the buffer | |
126 | * being accessed from userspace. | |
127 | * | |
128 | * Note that we could optimize slightly when we know that multiple | |
129 | * tiler containers are backed by the same PAT.. but I'll leave that | |
130 | * for later.. | |
131 | */ | |
132 | #define NUM_USERGART_ENTRIES 2 | |
f4302747 | 133 | struct omap_drm_usergart_entry { |
f7f9f453 RC |
134 | struct tiler_block *block; /* the reserved tiler block */ |
135 | dma_addr_t paddr; | |
136 | struct drm_gem_object *obj; /* the current pinned obj */ | |
137 | pgoff_t obj_pgoff; /* page offset of obj currently | |
138 | mapped in */ | |
139 | }; | |
f4302747 LP |
140 | |
141 | struct omap_drm_usergart { | |
142 | struct omap_drm_usergart_entry entry[NUM_USERGART_ENTRIES]; | |
f7f9f453 RC |
143 | int height; /* height in rows */ |
144 | int height_shift; /* ilog2(height in rows) */ | |
145 | int slot_shift; /* ilog2(width per slot) */ | |
146 | int stride_pfn; /* stride in pages */ | |
147 | int last; /* index of last used entry */ | |
f4302747 | 148 | }; |
f7f9f453 | 149 | |
b902f8f4 LP |
150 | /* ----------------------------------------------------------------------------- |
151 | * Helpers | |
152 | */ | |
153 | ||
154 | /** get mmap offset */ | |
155 | static uint64_t mmap_offset(struct drm_gem_object *obj) | |
156 | { | |
157 | struct drm_device *dev = obj->dev; | |
158 | int ret; | |
159 | size_t size; | |
160 | ||
161 | WARN_ON(!mutex_is_locked(&dev->struct_mutex)); | |
162 | ||
163 | /* Make it mmapable */ | |
164 | size = omap_gem_mmap_size(obj); | |
165 | ret = drm_gem_create_mmap_offset_size(obj, size); | |
166 | if (ret) { | |
167 | dev_err(dev->dev, "could not allocate mmap offset\n"); | |
168 | return 0; | |
169 | } | |
170 | ||
171 | return drm_vma_node_offset_addr(&obj->vma_node); | |
172 | } | |
173 | ||
b22e6690 | 174 | static bool is_contiguous(struct omap_gem_object *omap_obj) |
7ef93b0a | 175 | { |
b22e6690 LP |
176 | if (omap_obj->flags & OMAP_BO_MEM_DMA_API) |
177 | return true; | |
178 | ||
179 | if ((omap_obj->flags & OMAP_BO_MEM_DMABUF) && omap_obj->sgt->nents == 1) | |
180 | return true; | |
181 | ||
182 | return false; | |
7ef93b0a LP |
183 | } |
184 | ||
185 | /* ----------------------------------------------------------------------------- | |
186 | * Eviction | |
187 | */ | |
f7f9f453 RC |
188 | |
189 | static void evict_entry(struct drm_gem_object *obj, | |
f4302747 | 190 | enum tiler_fmt fmt, struct omap_drm_usergart_entry *entry) |
f7f9f453 | 191 | { |
6796cb16 | 192 | struct omap_gem_object *omap_obj = to_omap_bo(obj); |
f4302747 LP |
193 | struct omap_drm_private *priv = obj->dev->dev_private; |
194 | int n = priv->usergart[fmt].height; | |
6796cb16 DH |
195 | size_t size = PAGE_SIZE * n; |
196 | loff_t off = mmap_offset(obj) + | |
197 | (entry->obj_pgoff << PAGE_SHIFT); | |
198 | const int m = 1 + ((omap_obj->width << fmt) / PAGE_SIZE); | |
199 | ||
200 | if (m > 1) { | |
201 | int i; | |
202 | /* if stride > than PAGE_SIZE then sparse mapping: */ | |
203 | for (i = n; i > 0; i--) { | |
204 | unmap_mapping_range(obj->dev->anon_inode->i_mapping, | |
205 | off, PAGE_SIZE, 1); | |
206 | off += PAGE_SIZE * m; | |
e559895a | 207 | } |
6796cb16 DH |
208 | } else { |
209 | unmap_mapping_range(obj->dev->anon_inode->i_mapping, | |
210 | off, size, 1); | |
f7f9f453 RC |
211 | } |
212 | ||
213 | entry->obj = NULL; | |
214 | } | |
215 | ||
216 | /* Evict a buffer from usergart, if it is mapped there */ | |
217 | static void evict(struct drm_gem_object *obj) | |
218 | { | |
219 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
f4302747 | 220 | struct omap_drm_private *priv = obj->dev->dev_private; |
f7f9f453 RC |
221 | |
222 | if (omap_obj->flags & OMAP_BO_TILED) { | |
223 | enum tiler_fmt fmt = gem2fmt(omap_obj->flags); | |
224 | int i; | |
225 | ||
f7f9f453 | 226 | for (i = 0; i < NUM_USERGART_ENTRIES; i++) { |
f4302747 LP |
227 | struct omap_drm_usergart_entry *entry = |
228 | &priv->usergart[fmt].entry[i]; | |
229 | ||
f7f9f453 RC |
230 | if (entry->obj == obj) |
231 | evict_entry(obj, fmt, entry); | |
232 | } | |
233 | } | |
234 | } | |
235 | ||
7ef93b0a LP |
236 | /* ----------------------------------------------------------------------------- |
237 | * Page Management | |
8b6b569e | 238 | */ |
cd5351f4 RC |
239 | |
240 | /** ensure backing pages are allocated */ | |
241 | static int omap_gem_attach_pages(struct drm_gem_object *obj) | |
242 | { | |
8b6b569e | 243 | struct drm_device *dev = obj->dev; |
cd5351f4 RC |
244 | struct omap_gem_object *omap_obj = to_omap_bo(obj); |
245 | struct page **pages; | |
d4eb23a9 EG |
246 | int npages = obj->size >> PAGE_SHIFT; |
247 | int i, ret; | |
8b6b569e | 248 | dma_addr_t *addrs; |
cd5351f4 RC |
249 | |
250 | WARN_ON(omap_obj->pages); | |
251 | ||
0cdbe8ac | 252 | pages = drm_gem_get_pages(obj); |
cd5351f4 RC |
253 | if (IS_ERR(pages)) { |
254 | dev_err(obj->dev->dev, "could not get pages: %ld\n", PTR_ERR(pages)); | |
255 | return PTR_ERR(pages); | |
256 | } | |
257 | ||
f3bc9d24 RC |
258 | /* for non-cached buffers, ensure the new pages are clean because |
259 | * DSS, GPU, etc. are not cache coherent: | |
260 | */ | |
261 | if (omap_obj->flags & (OMAP_BO_WC|OMAP_BO_UNCACHED)) { | |
23d84ed9 | 262 | addrs = kmalloc(npages * sizeof(*addrs), GFP_KERNEL); |
d4eb23a9 EG |
263 | if (!addrs) { |
264 | ret = -ENOMEM; | |
265 | goto free_pages; | |
266 | } | |
267 | ||
f3bc9d24 | 268 | for (i = 0; i < npages; i++) { |
8b6b569e | 269 | addrs[i] = dma_map_page(dev->dev, pages[i], |
f3bc9d24 | 270 | 0, PAGE_SIZE, DMA_BIDIRECTIONAL); |
579ef254 TV |
271 | |
272 | if (dma_mapping_error(dev->dev, addrs[i])) { | |
273 | dev_warn(dev->dev, | |
274 | "%s: failed to map page\n", __func__); | |
275 | ||
276 | for (i = i - 1; i >= 0; --i) { | |
277 | dma_unmap_page(dev->dev, addrs[i], | |
278 | PAGE_SIZE, DMA_BIDIRECTIONAL); | |
279 | } | |
280 | ||
281 | ret = -ENOMEM; | |
282 | goto free_addrs; | |
283 | } | |
f3bc9d24 | 284 | } |
8b6b569e | 285 | } else { |
23d84ed9 | 286 | addrs = kzalloc(npages * sizeof(*addrs), GFP_KERNEL); |
d4eb23a9 EG |
287 | if (!addrs) { |
288 | ret = -ENOMEM; | |
289 | goto free_pages; | |
290 | } | |
f3bc9d24 RC |
291 | } |
292 | ||
8b6b569e | 293 | omap_obj->addrs = addrs; |
cd5351f4 | 294 | omap_obj->pages = pages; |
8b6b569e | 295 | |
cd5351f4 | 296 | return 0; |
d4eb23a9 | 297 | |
579ef254 TV |
298 | free_addrs: |
299 | kfree(addrs); | |
d4eb23a9 | 300 | free_pages: |
ddcd09d6 | 301 | drm_gem_put_pages(obj, pages, true, false); |
d4eb23a9 EG |
302 | |
303 | return ret; | |
cd5351f4 RC |
304 | } |
305 | ||
b902f8f4 LP |
306 | /* acquire pages when needed (for example, for DMA where physically |
307 | * contiguous buffer is not required | |
308 | */ | |
309 | static int get_pages(struct drm_gem_object *obj, struct page ***pages) | |
310 | { | |
311 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
312 | int ret = 0; | |
313 | ||
cdb0381d | 314 | if ((omap_obj->flags & OMAP_BO_MEM_SHMEM) && !omap_obj->pages) { |
b902f8f4 LP |
315 | ret = omap_gem_attach_pages(obj); |
316 | if (ret) { | |
317 | dev_err(obj->dev->dev, "could not attach pages\n"); | |
318 | return ret; | |
319 | } | |
320 | } | |
321 | ||
322 | /* TODO: even phys-contig.. we should have a list of pages? */ | |
323 | *pages = omap_obj->pages; | |
324 | ||
325 | return 0; | |
326 | } | |
327 | ||
cd5351f4 RC |
328 | /** release backing pages */ |
329 | static void omap_gem_detach_pages(struct drm_gem_object *obj) | |
330 | { | |
331 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
f3bc9d24 RC |
332 | |
333 | /* for non-cached buffers, ensure the new pages are clean because | |
334 | * DSS, GPU, etc. are not cache coherent: | |
335 | */ | |
336 | if (omap_obj->flags & (OMAP_BO_WC|OMAP_BO_UNCACHED)) { | |
337 | int i, npages = obj->size >> PAGE_SHIFT; | |
338 | for (i = 0; i < npages; i++) { | |
339 | dma_unmap_page(obj->dev->dev, omap_obj->addrs[i], | |
340 | PAGE_SIZE, DMA_BIDIRECTIONAL); | |
341 | } | |
f3bc9d24 RC |
342 | } |
343 | ||
8b6b569e RC |
344 | kfree(omap_obj->addrs); |
345 | omap_obj->addrs = NULL; | |
346 | ||
ddcd09d6 | 347 | drm_gem_put_pages(obj, omap_obj->pages, true, false); |
cd5351f4 RC |
348 | omap_obj->pages = NULL; |
349 | } | |
350 | ||
6ad11bc3 RC |
351 | /* get buffer flags */ |
352 | uint32_t omap_gem_flags(struct drm_gem_object *obj) | |
353 | { | |
354 | return to_omap_bo(obj)->flags; | |
355 | } | |
356 | ||
c5b1247b RC |
357 | uint64_t omap_gem_mmap_offset(struct drm_gem_object *obj) |
358 | { | |
359 | uint64_t offset; | |
360 | mutex_lock(&obj->dev->struct_mutex); | |
361 | offset = mmap_offset(obj); | |
362 | mutex_unlock(&obj->dev->struct_mutex); | |
363 | return offset; | |
364 | } | |
365 | ||
f7f9f453 RC |
366 | /** get mmap size */ |
367 | size_t omap_gem_mmap_size(struct drm_gem_object *obj) | |
368 | { | |
369 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
370 | size_t size = obj->size; | |
371 | ||
372 | if (omap_obj->flags & OMAP_BO_TILED) { | |
373 | /* for tiled buffers, the virtual size has stride rounded up | |
374 | * to 4kb.. (to hide the fact that row n+1 might start 16kb or | |
375 | * 32kb later!). But we don't back the entire buffer with | |
376 | * pages, only the valid picture part.. so need to adjust for | |
377 | * this in the size used to mmap and generate mmap offset | |
378 | */ | |
379 | size = tiler_vsize(gem2fmt(omap_obj->flags), | |
380 | omap_obj->width, omap_obj->height); | |
381 | } | |
382 | ||
383 | return size; | |
384 | } | |
385 | ||
3c810c61 RC |
386 | /* get tiled size, returns -EINVAL if not tiled buffer */ |
387 | int omap_gem_tiled_size(struct drm_gem_object *obj, uint16_t *w, uint16_t *h) | |
388 | { | |
389 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
390 | if (omap_obj->flags & OMAP_BO_TILED) { | |
391 | *w = omap_obj->width; | |
392 | *h = omap_obj->height; | |
393 | return 0; | |
394 | } | |
395 | return -EINVAL; | |
396 | } | |
f7f9f453 | 397 | |
7ef93b0a LP |
398 | /* ----------------------------------------------------------------------------- |
399 | * Fault Handling | |
400 | */ | |
401 | ||
f7f9f453 RC |
402 | /* Normal handling for the case of faulting in non-tiled buffers */ |
403 | static int fault_1d(struct drm_gem_object *obj, | |
404 | struct vm_area_struct *vma, struct vm_fault *vmf) | |
405 | { | |
406 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
407 | unsigned long pfn; | |
408 | pgoff_t pgoff; | |
409 | ||
410 | /* We don't use vmf->pgoff since that has the fake offset: */ | |
411 | pgoff = ((unsigned long)vmf->virtual_address - | |
412 | vma->vm_start) >> PAGE_SHIFT; | |
413 | ||
414 | if (omap_obj->pages) { | |
8b6b569e | 415 | omap_gem_cpu_sync(obj, pgoff); |
f7f9f453 RC |
416 | pfn = page_to_pfn(omap_obj->pages[pgoff]); |
417 | } else { | |
b22e6690 | 418 | BUG_ON(!is_contiguous(omap_obj)); |
f7f9f453 RC |
419 | pfn = (omap_obj->paddr >> PAGE_SHIFT) + pgoff; |
420 | } | |
421 | ||
422 | VERB("Inserting %p pfn %lx, pa %lx", vmf->virtual_address, | |
423 | pfn, pfn << PAGE_SHIFT); | |
424 | ||
01c8f1c4 DW |
425 | return vm_insert_mixed(vma, (unsigned long)vmf->virtual_address, |
426 | __pfn_to_pfn_t(pfn, PFN_DEV)); | |
f7f9f453 RC |
427 | } |
428 | ||
429 | /* Special handling for the case of faulting in 2d tiled buffers */ | |
430 | static int fault_2d(struct drm_gem_object *obj, | |
431 | struct vm_area_struct *vma, struct vm_fault *vmf) | |
432 | { | |
433 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
f4302747 LP |
434 | struct omap_drm_private *priv = obj->dev->dev_private; |
435 | struct omap_drm_usergart_entry *entry; | |
f7f9f453 RC |
436 | enum tiler_fmt fmt = gem2fmt(omap_obj->flags); |
437 | struct page *pages[64]; /* XXX is this too much to have on stack? */ | |
438 | unsigned long pfn; | |
439 | pgoff_t pgoff, base_pgoff; | |
440 | void __user *vaddr; | |
441 | int i, ret, slots; | |
442 | ||
e559895a RC |
443 | /* |
444 | * Note the height of the slot is also equal to the number of pages | |
445 | * that need to be mapped in to fill 4kb wide CPU page. If the slot | |
446 | * height is 64, then 64 pages fill a 4kb wide by 64 row region. | |
447 | */ | |
f4302747 LP |
448 | const int n = priv->usergart[fmt].height; |
449 | const int n_shift = priv->usergart[fmt].height_shift; | |
e559895a RC |
450 | |
451 | /* | |
452 | * If buffer width in bytes > PAGE_SIZE then the virtual stride is | |
453 | * rounded up to next multiple of PAGE_SIZE.. this need to be taken | |
454 | * into account in some of the math, so figure out virtual stride | |
455 | * in pages | |
f7f9f453 | 456 | */ |
e559895a | 457 | const int m = 1 + ((omap_obj->width << fmt) / PAGE_SIZE); |
f7f9f453 RC |
458 | |
459 | /* We don't use vmf->pgoff since that has the fake offset: */ | |
460 | pgoff = ((unsigned long)vmf->virtual_address - | |
461 | vma->vm_start) >> PAGE_SHIFT; | |
462 | ||
e559895a RC |
463 | /* |
464 | * Actual address we start mapping at is rounded down to previous slot | |
f7f9f453 RC |
465 | * boundary in the y direction: |
466 | */ | |
e559895a | 467 | base_pgoff = round_down(pgoff, m << n_shift); |
f7f9f453 | 468 | |
e559895a | 469 | /* figure out buffer width in slots */ |
f4302747 | 470 | slots = omap_obj->width >> priv->usergart[fmt].slot_shift; |
f7f9f453 | 471 | |
e559895a RC |
472 | vaddr = vmf->virtual_address - ((pgoff - base_pgoff) << PAGE_SHIFT); |
473 | ||
f4302747 | 474 | entry = &priv->usergart[fmt].entry[priv->usergart[fmt].last]; |
e559895a | 475 | |
f7f9f453 RC |
476 | /* evict previous buffer using this usergart entry, if any: */ |
477 | if (entry->obj) | |
478 | evict_entry(entry->obj, fmt, entry); | |
479 | ||
480 | entry->obj = obj; | |
481 | entry->obj_pgoff = base_pgoff; | |
482 | ||
e559895a RC |
483 | /* now convert base_pgoff to phys offset from virt offset: */ |
484 | base_pgoff = (base_pgoff >> n_shift) * slots; | |
485 | ||
486 | /* for wider-than 4k.. figure out which part of the slot-row we want: */ | |
487 | if (m > 1) { | |
488 | int off = pgoff % m; | |
489 | entry->obj_pgoff += off; | |
490 | base_pgoff /= m; | |
491 | slots = min(slots - (off << n_shift), n); | |
492 | base_pgoff += off << n_shift; | |
493 | vaddr += off << PAGE_SHIFT; | |
494 | } | |
495 | ||
496 | /* | |
497 | * Map in pages. Beyond the valid pixel part of the buffer, we set | |
498 | * pages[i] to NULL to get a dummy page mapped in.. if someone | |
499 | * reads/writes it they will get random/undefined content, but at | |
500 | * least it won't be corrupting whatever other random page used to | |
501 | * be mapped in, or other undefined behavior. | |
f7f9f453 RC |
502 | */ |
503 | memcpy(pages, &omap_obj->pages[base_pgoff], | |
504 | sizeof(struct page *) * slots); | |
505 | memset(pages + slots, 0, | |
e559895a | 506 | sizeof(struct page *) * (n - slots)); |
f7f9f453 | 507 | |
a6a91827 | 508 | ret = tiler_pin(entry->block, pages, ARRAY_SIZE(pages), 0, true); |
f7f9f453 RC |
509 | if (ret) { |
510 | dev_err(obj->dev->dev, "failed to pin: %d\n", ret); | |
511 | return ret; | |
512 | } | |
513 | ||
f7f9f453 RC |
514 | pfn = entry->paddr >> PAGE_SHIFT; |
515 | ||
516 | VERB("Inserting %p pfn %lx, pa %lx", vmf->virtual_address, | |
517 | pfn, pfn << PAGE_SHIFT); | |
518 | ||
e559895a | 519 | for (i = n; i > 0; i--) { |
01c8f1c4 DW |
520 | vm_insert_mixed(vma, (unsigned long)vaddr, |
521 | __pfn_to_pfn_t(pfn, PFN_DEV)); | |
f4302747 | 522 | pfn += priv->usergart[fmt].stride_pfn; |
e559895a | 523 | vaddr += PAGE_SIZE * m; |
f7f9f453 RC |
524 | } |
525 | ||
526 | /* simple round-robin: */ | |
f4302747 LP |
527 | priv->usergart[fmt].last = (priv->usergart[fmt].last + 1) |
528 | % NUM_USERGART_ENTRIES; | |
f7f9f453 RC |
529 | |
530 | return 0; | |
531 | } | |
532 | ||
cd5351f4 RC |
533 | /** |
534 | * omap_gem_fault - pagefault handler for GEM objects | |
535 | * @vma: the VMA of the GEM object | |
536 | * @vmf: fault detail | |
537 | * | |
538 | * Invoked when a fault occurs on an mmap of a GEM managed area. GEM | |
539 | * does most of the work for us including the actual map/unmap calls | |
540 | * but we need to do the actual page work. | |
541 | * | |
542 | * The VMA was set up by GEM. In doing so it also ensured that the | |
543 | * vma->vm_private_data points to the GEM object that is backing this | |
544 | * mapping. | |
545 | */ | |
546 | int omap_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) | |
547 | { | |
548 | struct drm_gem_object *obj = vma->vm_private_data; | |
549 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
550 | struct drm_device *dev = obj->dev; | |
551 | struct page **pages; | |
cd5351f4 RC |
552 | int ret; |
553 | ||
554 | /* Make sure we don't parallel update on a fault, nor move or remove | |
555 | * something from beneath our feet | |
556 | */ | |
557 | mutex_lock(&dev->struct_mutex); | |
558 | ||
559 | /* if a shmem backed object, make sure we have pages attached now */ | |
560 | ret = get_pages(obj, &pages); | |
ae053039 | 561 | if (ret) |
cd5351f4 | 562 | goto fail; |
cd5351f4 RC |
563 | |
564 | /* where should we do corresponding put_pages().. we are mapping | |
565 | * the original page, rather than thru a GART, so we can't rely | |
566 | * on eviction to trigger this. But munmap() or all mappings should | |
567 | * probably trigger put_pages()? | |
568 | */ | |
569 | ||
f7f9f453 RC |
570 | if (omap_obj->flags & OMAP_BO_TILED) |
571 | ret = fault_2d(obj, vma, vmf); | |
572 | else | |
573 | ret = fault_1d(obj, vma, vmf); | |
cd5351f4 | 574 | |
cd5351f4 RC |
575 | |
576 | fail: | |
577 | mutex_unlock(&dev->struct_mutex); | |
578 | switch (ret) { | |
579 | case 0: | |
580 | case -ERESTARTSYS: | |
581 | case -EINTR: | |
e1d4ee0f RC |
582 | case -EBUSY: |
583 | /* | |
584 | * EBUSY is ok: this just means that another thread | |
585 | * already did the job. | |
586 | */ | |
cd5351f4 RC |
587 | return VM_FAULT_NOPAGE; |
588 | case -ENOMEM: | |
589 | return VM_FAULT_OOM; | |
590 | default: | |
591 | return VM_FAULT_SIGBUS; | |
592 | } | |
593 | } | |
594 | ||
595 | /** We override mainly to fix up some of the vm mapping flags.. */ | |
596 | int omap_gem_mmap(struct file *filp, struct vm_area_struct *vma) | |
597 | { | |
cd5351f4 RC |
598 | int ret; |
599 | ||
600 | ret = drm_gem_mmap(filp, vma); | |
601 | if (ret) { | |
602 | DBG("mmap failed: %d", ret); | |
603 | return ret; | |
604 | } | |
605 | ||
8b6b569e RC |
606 | return omap_gem_mmap_obj(vma->vm_private_data, vma); |
607 | } | |
608 | ||
609 | int omap_gem_mmap_obj(struct drm_gem_object *obj, | |
610 | struct vm_area_struct *vma) | |
611 | { | |
612 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
cd5351f4 RC |
613 | |
614 | vma->vm_flags &= ~VM_PFNMAP; | |
615 | vma->vm_flags |= VM_MIXEDMAP; | |
616 | ||
617 | if (omap_obj->flags & OMAP_BO_WC) { | |
618 | vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags)); | |
619 | } else if (omap_obj->flags & OMAP_BO_UNCACHED) { | |
620 | vma->vm_page_prot = pgprot_noncached(vm_get_page_prot(vma->vm_flags)); | |
621 | } else { | |
8b6b569e RC |
622 | /* |
623 | * We do have some private objects, at least for scanout buffers | |
624 | * on hardware without DMM/TILER. But these are allocated write- | |
625 | * combine | |
626 | */ | |
627 | if (WARN_ON(!obj->filp)) | |
628 | return -EINVAL; | |
629 | ||
630 | /* | |
631 | * Shunt off cached objs to shmem file so they have their own | |
632 | * address_space (so unmap_mapping_range does what we want, | |
633 | * in particular in the case of mmap'd dmabufs) | |
634 | */ | |
635 | fput(vma->vm_file); | |
8b6b569e | 636 | vma->vm_pgoff = 0; |
cb0942b8 | 637 | vma->vm_file = get_file(obj->filp); |
8b6b569e | 638 | |
cd5351f4 RC |
639 | vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); |
640 | } | |
641 | ||
8b6b569e | 642 | return 0; |
cd5351f4 RC |
643 | } |
644 | ||
7ef93b0a LP |
645 | /* ----------------------------------------------------------------------------- |
646 | * Dumb Buffers | |
647 | */ | |
8b6b569e | 648 | |
cd5351f4 RC |
649 | /** |
650 | * omap_gem_dumb_create - create a dumb buffer | |
651 | * @drm_file: our client file | |
652 | * @dev: our device | |
653 | * @args: the requested arguments copied from userspace | |
654 | * | |
655 | * Allocate a buffer suitable for use for a frame buffer of the | |
656 | * form described by user space. Give userspace a handle by which | |
657 | * to reference it. | |
658 | */ | |
659 | int omap_gem_dumb_create(struct drm_file *file, struct drm_device *dev, | |
660 | struct drm_mode_create_dumb *args) | |
661 | { | |
662 | union omap_gem_size gsize; | |
663 | ||
bdb2b933 | 664 | args->pitch = align_pitch(0, args->width, args->bpp); |
cd5351f4 RC |
665 | args->size = PAGE_ALIGN(args->pitch * args->height); |
666 | ||
667 | gsize = (union omap_gem_size){ | |
668 | .bytes = args->size, | |
669 | }; | |
670 | ||
671 | return omap_gem_new_handle(dev, file, gsize, | |
672 | OMAP_BO_SCANOUT | OMAP_BO_WC, &args->handle); | |
673 | } | |
674 | ||
cd5351f4 RC |
675 | /** |
676 | * omap_gem_dumb_map - buffer mapping for dumb interface | |
677 | * @file: our drm client file | |
678 | * @dev: drm device | |
679 | * @handle: GEM handle to the object (from dumb_create) | |
680 | * | |
681 | * Do the necessary setup to allow the mapping of the frame buffer | |
682 | * into user memory. We don't have to do much here at the moment. | |
683 | */ | |
684 | int omap_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev, | |
685 | uint32_t handle, uint64_t *offset) | |
686 | { | |
687 | struct drm_gem_object *obj; | |
688 | int ret = 0; | |
689 | ||
cd5351f4 | 690 | /* GEM does all our handle to object mapping */ |
a8ad0bd8 | 691 | obj = drm_gem_object_lookup(file, handle); |
cd5351f4 RC |
692 | if (obj == NULL) { |
693 | ret = -ENOENT; | |
694 | goto fail; | |
695 | } | |
696 | ||
697 | *offset = omap_gem_mmap_offset(obj); | |
698 | ||
699 | drm_gem_object_unreference_unlocked(obj); | |
700 | ||
701 | fail: | |
cd5351f4 RC |
702 | return ret; |
703 | } | |
704 | ||
e1c1174f | 705 | #ifdef CONFIG_DRM_FBDEV_EMULATION |
a6a91827 RC |
706 | /* Set scrolling position. This allows us to implement fast scrolling |
707 | * for console. | |
9b55b95a RC |
708 | * |
709 | * Call only from non-atomic contexts. | |
a6a91827 RC |
710 | */ |
711 | int omap_gem_roll(struct drm_gem_object *obj, uint32_t roll) | |
712 | { | |
713 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
714 | uint32_t npages = obj->size >> PAGE_SHIFT; | |
715 | int ret = 0; | |
716 | ||
717 | if (roll > npages) { | |
718 | dev_err(obj->dev->dev, "invalid roll: %d\n", roll); | |
719 | return -EINVAL; | |
720 | } | |
721 | ||
a6a91827 RC |
722 | omap_obj->roll = roll; |
723 | ||
af69592a RC |
724 | mutex_lock(&obj->dev->struct_mutex); |
725 | ||
a6a91827 RC |
726 | /* if we aren't mapped yet, we don't need to do anything */ |
727 | if (omap_obj->block) { | |
728 | struct page **pages; | |
729 | ret = get_pages(obj, &pages); | |
730 | if (ret) | |
731 | goto fail; | |
732 | ret = tiler_pin(omap_obj->block, pages, npages, roll, true); | |
733 | if (ret) | |
734 | dev_err(obj->dev->dev, "could not repin: %d\n", ret); | |
735 | } | |
736 | ||
737 | fail: | |
738 | mutex_unlock(&obj->dev->struct_mutex); | |
739 | ||
740 | return ret; | |
741 | } | |
e1c1174f | 742 | #endif |
a6a91827 | 743 | |
7ef93b0a LP |
744 | /* ----------------------------------------------------------------------------- |
745 | * Memory Management & DMA Sync | |
746 | */ | |
747 | ||
748 | /** | |
749 | * shmem buffers that are mapped cached can simulate coherency via using | |
750 | * page faulting to keep track of dirty pages | |
751 | */ | |
752 | static inline bool is_cached_coherent(struct drm_gem_object *obj) | |
753 | { | |
754 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
cdb0381d LP |
755 | |
756 | return (omap_obj->flags & OMAP_BO_MEM_SHMEM) && | |
7ef93b0a LP |
757 | ((omap_obj->flags & OMAP_BO_CACHE_MASK) == OMAP_BO_CACHED); |
758 | } | |
a6a91827 | 759 | |
8b6b569e RC |
760 | /* Sync the buffer for CPU access.. note pages should already be |
761 | * attached, ie. omap_gem_get_pages() | |
762 | */ | |
763 | void omap_gem_cpu_sync(struct drm_gem_object *obj, int pgoff) | |
764 | { | |
765 | struct drm_device *dev = obj->dev; | |
766 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
767 | ||
768 | if (is_cached_coherent(obj) && omap_obj->addrs[pgoff]) { | |
769 | dma_unmap_page(dev->dev, omap_obj->addrs[pgoff], | |
770 | PAGE_SIZE, DMA_BIDIRECTIONAL); | |
771 | omap_obj->addrs[pgoff] = 0; | |
772 | } | |
773 | } | |
774 | ||
775 | /* sync the buffer for DMA access */ | |
776 | void omap_gem_dma_sync(struct drm_gem_object *obj, | |
777 | enum dma_data_direction dir) | |
778 | { | |
779 | struct drm_device *dev = obj->dev; | |
780 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
781 | ||
782 | if (is_cached_coherent(obj)) { | |
783 | int i, npages = obj->size >> PAGE_SHIFT; | |
784 | struct page **pages = omap_obj->pages; | |
785 | bool dirty = false; | |
786 | ||
787 | for (i = 0; i < npages; i++) { | |
788 | if (!omap_obj->addrs[i]) { | |
a3d6345d TV |
789 | dma_addr_t addr; |
790 | ||
791 | addr = dma_map_page(dev->dev, pages[i], 0, | |
8b6b569e | 792 | PAGE_SIZE, DMA_BIDIRECTIONAL); |
a3d6345d TV |
793 | |
794 | if (dma_mapping_error(dev->dev, addr)) { | |
795 | dev_warn(dev->dev, | |
796 | "%s: failed to map page\n", | |
797 | __func__); | |
798 | break; | |
799 | } | |
800 | ||
8b6b569e | 801 | dirty = true; |
a3d6345d | 802 | omap_obj->addrs[i] = addr; |
8b6b569e RC |
803 | } |
804 | } | |
805 | ||
806 | if (dirty) { | |
807 | unmap_mapping_range(obj->filp->f_mapping, 0, | |
808 | omap_gem_mmap_size(obj), 1); | |
809 | } | |
810 | } | |
811 | } | |
812 | ||
cd5351f4 RC |
813 | /* Get physical address for DMA.. if 'remap' is true, and the buffer is not |
814 | * already contiguous, remap it to pin in physically contiguous memory.. (ie. | |
815 | * map in TILER) | |
816 | */ | |
817 | int omap_gem_get_paddr(struct drm_gem_object *obj, | |
818 | dma_addr_t *paddr, bool remap) | |
819 | { | |
a6a91827 | 820 | struct omap_drm_private *priv = obj->dev->dev_private; |
cd5351f4 RC |
821 | struct omap_gem_object *omap_obj = to_omap_bo(obj); |
822 | int ret = 0; | |
823 | ||
f7f9f453 RC |
824 | mutex_lock(&obj->dev->struct_mutex); |
825 | ||
b22e6690 | 826 | if (!is_contiguous(omap_obj) && remap && priv->has_dmm) { |
f7f9f453 RC |
827 | if (omap_obj->paddr_cnt == 0) { |
828 | struct page **pages; | |
a6a91827 | 829 | uint32_t npages = obj->size >> PAGE_SHIFT; |
f7f9f453 RC |
830 | enum tiler_fmt fmt = gem2fmt(omap_obj->flags); |
831 | struct tiler_block *block; | |
a6a91827 | 832 | |
f7f9f453 RC |
833 | BUG_ON(omap_obj->block); |
834 | ||
835 | ret = get_pages(obj, &pages); | |
836 | if (ret) | |
837 | goto fail; | |
838 | ||
f7f9f453 RC |
839 | if (omap_obj->flags & OMAP_BO_TILED) { |
840 | block = tiler_reserve_2d(fmt, | |
841 | omap_obj->width, | |
842 | omap_obj->height, 0); | |
843 | } else { | |
844 | block = tiler_reserve_1d(obj->size); | |
845 | } | |
846 | ||
847 | if (IS_ERR(block)) { | |
848 | ret = PTR_ERR(block); | |
849 | dev_err(obj->dev->dev, | |
850 | "could not remap: %d (%d)\n", ret, fmt); | |
851 | goto fail; | |
852 | } | |
853 | ||
854 | /* TODO: enable async refill.. */ | |
a6a91827 RC |
855 | ret = tiler_pin(block, pages, npages, |
856 | omap_obj->roll, true); | |
f7f9f453 RC |
857 | if (ret) { |
858 | tiler_release(block); | |
859 | dev_err(obj->dev->dev, | |
860 | "could not pin: %d\n", ret); | |
861 | goto fail; | |
862 | } | |
863 | ||
864 | omap_obj->paddr = tiler_ssptr(block); | |
865 | omap_obj->block = block; | |
866 | ||
2d31ca3a | 867 | DBG("got paddr: %pad", &omap_obj->paddr); |
f7f9f453 RC |
868 | } |
869 | ||
870 | omap_obj->paddr_cnt++; | |
871 | ||
872 | *paddr = omap_obj->paddr; | |
b22e6690 | 873 | } else if (is_contiguous(omap_obj)) { |
f7f9f453 RC |
874 | *paddr = omap_obj->paddr; |
875 | } else { | |
876 | ret = -EINVAL; | |
8b6b569e | 877 | goto fail; |
cd5351f4 RC |
878 | } |
879 | ||
f7f9f453 RC |
880 | fail: |
881 | mutex_unlock(&obj->dev->struct_mutex); | |
cd5351f4 RC |
882 | |
883 | return ret; | |
884 | } | |
885 | ||
886 | /* Release physical address, when DMA is no longer being performed.. this | |
887 | * could potentially unpin and unmap buffers from TILER | |
888 | */ | |
393a949f | 889 | void omap_gem_put_paddr(struct drm_gem_object *obj) |
cd5351f4 | 890 | { |
f7f9f453 | 891 | struct omap_gem_object *omap_obj = to_omap_bo(obj); |
393a949f | 892 | int ret; |
f7f9f453 RC |
893 | |
894 | mutex_lock(&obj->dev->struct_mutex); | |
895 | if (omap_obj->paddr_cnt > 0) { | |
896 | omap_obj->paddr_cnt--; | |
897 | if (omap_obj->paddr_cnt == 0) { | |
898 | ret = tiler_unpin(omap_obj->block); | |
899 | if (ret) { | |
900 | dev_err(obj->dev->dev, | |
901 | "could not unpin pages: %d\n", ret); | |
f7f9f453 RC |
902 | } |
903 | ret = tiler_release(omap_obj->block); | |
904 | if (ret) { | |
905 | dev_err(obj->dev->dev, | |
906 | "could not release unmap: %d\n", ret); | |
907 | } | |
3f4d17c4 | 908 | omap_obj->paddr = 0; |
f7f9f453 RC |
909 | omap_obj->block = NULL; |
910 | } | |
911 | } | |
393a949f | 912 | |
f7f9f453 | 913 | mutex_unlock(&obj->dev->struct_mutex); |
cd5351f4 RC |
914 | } |
915 | ||
3c810c61 RC |
916 | /* Get rotated scanout address (only valid if already pinned), at the |
917 | * specified orientation and x,y offset from top-left corner of buffer | |
918 | * (only valid for tiled 2d buffers) | |
919 | */ | |
920 | int omap_gem_rotated_paddr(struct drm_gem_object *obj, uint32_t orient, | |
921 | int x, int y, dma_addr_t *paddr) | |
922 | { | |
923 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
924 | int ret = -EINVAL; | |
925 | ||
926 | mutex_lock(&obj->dev->struct_mutex); | |
927 | if ((omap_obj->paddr_cnt > 0) && omap_obj->block && | |
928 | (omap_obj->flags & OMAP_BO_TILED)) { | |
929 | *paddr = tiler_tsptr(omap_obj->block, orient, x, y); | |
930 | ret = 0; | |
931 | } | |
932 | mutex_unlock(&obj->dev->struct_mutex); | |
933 | return ret; | |
934 | } | |
935 | ||
936 | /* Get tiler stride for the buffer (only valid for 2d tiled buffers) */ | |
937 | int omap_gem_tiled_stride(struct drm_gem_object *obj, uint32_t orient) | |
938 | { | |
939 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
940 | int ret = -EINVAL; | |
941 | if (omap_obj->flags & OMAP_BO_TILED) | |
942 | ret = tiler_stride(gem2fmt(omap_obj->flags), orient); | |
943 | return ret; | |
944 | } | |
945 | ||
6ad11bc3 RC |
946 | /* if !remap, and we don't have pages backing, then fail, rather than |
947 | * increasing the pin count (which we don't really do yet anyways, | |
948 | * because we don't support swapping pages back out). And 'remap' | |
949 | * might not be quite the right name, but I wanted to keep it working | |
950 | * similarly to omap_gem_get_paddr(). Note though that mutex is not | |
951 | * aquired if !remap (because this can be called in atomic ctxt), | |
952 | * but probably omap_gem_get_paddr() should be changed to work in the | |
953 | * same way. If !remap, a matching omap_gem_put_pages() call is not | |
954 | * required (and should not be made). | |
955 | */ | |
956 | int omap_gem_get_pages(struct drm_gem_object *obj, struct page ***pages, | |
957 | bool remap) | |
cd5351f4 RC |
958 | { |
959 | int ret; | |
6ad11bc3 RC |
960 | if (!remap) { |
961 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
962 | if (!omap_obj->pages) | |
963 | return -ENOMEM; | |
964 | *pages = omap_obj->pages; | |
965 | return 0; | |
966 | } | |
cd5351f4 RC |
967 | mutex_lock(&obj->dev->struct_mutex); |
968 | ret = get_pages(obj, pages); | |
969 | mutex_unlock(&obj->dev->struct_mutex); | |
970 | return ret; | |
971 | } | |
972 | ||
973 | /* release pages when DMA no longer being performed */ | |
974 | int omap_gem_put_pages(struct drm_gem_object *obj) | |
975 | { | |
976 | /* do something here if we dynamically attach/detach pages.. at | |
977 | * least they would no longer need to be pinned if everyone has | |
978 | * released the pages.. | |
979 | */ | |
980 | return 0; | |
981 | } | |
982 | ||
e1c1174f | 983 | #ifdef CONFIG_DRM_FBDEV_EMULATION |
f7f9f453 RC |
984 | /* Get kernel virtual address for CPU access.. this more or less only |
985 | * exists for omap_fbdev. This should be called with struct_mutex | |
986 | * held. | |
cd5351f4 RC |
987 | */ |
988 | void *omap_gem_vaddr(struct drm_gem_object *obj) | |
989 | { | |
990 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
696e3ca3 | 991 | WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); |
f7f9f453 RC |
992 | if (!omap_obj->vaddr) { |
993 | struct page **pages; | |
994 | int ret = get_pages(obj, &pages); | |
995 | if (ret) | |
996 | return ERR_PTR(ret); | |
997 | omap_obj->vaddr = vmap(pages, obj->size >> PAGE_SHIFT, | |
998 | VM_MAP, pgprot_writecombine(PAGE_KERNEL)); | |
999 | } | |
cd5351f4 RC |
1000 | return omap_obj->vaddr; |
1001 | } | |
e1c1174f | 1002 | #endif |
cd5351f4 | 1003 | |
7ef93b0a LP |
1004 | /* ----------------------------------------------------------------------------- |
1005 | * Power Management | |
1006 | */ | |
cd5351f4 | 1007 | |
e78edba1 AG |
1008 | #ifdef CONFIG_PM |
1009 | /* re-pin objects in DMM in resume path: */ | |
1010 | int omap_gem_resume(struct device *dev) | |
1011 | { | |
1012 | struct drm_device *drm_dev = dev_get_drvdata(dev); | |
1013 | struct omap_drm_private *priv = drm_dev->dev_private; | |
1014 | struct omap_gem_object *omap_obj; | |
1015 | int ret = 0; | |
1016 | ||
1017 | list_for_each_entry(omap_obj, &priv->obj_list, mm_list) { | |
1018 | if (omap_obj->block) { | |
1019 | struct drm_gem_object *obj = &omap_obj->base; | |
1020 | uint32_t npages = obj->size >> PAGE_SHIFT; | |
1021 | WARN_ON(!omap_obj->pages); /* this can't happen */ | |
1022 | ret = tiler_pin(omap_obj->block, | |
1023 | omap_obj->pages, npages, | |
1024 | omap_obj->roll, true); | |
1025 | if (ret) { | |
1026 | dev_err(dev, "could not repin: %d\n", ret); | |
1027 | return ret; | |
1028 | } | |
1029 | } | |
1030 | } | |
1031 | ||
1032 | return 0; | |
1033 | } | |
1034 | #endif | |
1035 | ||
7ef93b0a LP |
1036 | /* ----------------------------------------------------------------------------- |
1037 | * DebugFS | |
1038 | */ | |
1039 | ||
f6b6036e RC |
1040 | #ifdef CONFIG_DEBUG_FS |
1041 | void omap_gem_describe(struct drm_gem_object *obj, struct seq_file *m) | |
1042 | { | |
f6b6036e | 1043 | struct omap_gem_object *omap_obj = to_omap_bo(obj); |
0de23977 | 1044 | uint64_t off; |
f6b6036e | 1045 | |
0de23977 | 1046 | off = drm_vma_node_start(&obj->vma_node); |
f6b6036e | 1047 | |
2d31ca3a | 1048 | seq_printf(m, "%08x: %2d (%2d) %08llx %pad (%2d) %p %4d", |
f6b6036e | 1049 | omap_obj->flags, obj->name, obj->refcount.refcount.counter, |
2d31ca3a | 1050 | off, &omap_obj->paddr, omap_obj->paddr_cnt, |
f6b6036e RC |
1051 | omap_obj->vaddr, omap_obj->roll); |
1052 | ||
1053 | if (omap_obj->flags & OMAP_BO_TILED) { | |
1054 | seq_printf(m, " %dx%d", omap_obj->width, omap_obj->height); | |
1055 | if (omap_obj->block) { | |
1056 | struct tcm_area *area = &omap_obj->block->area; | |
1057 | seq_printf(m, " (%dx%d, %dx%d)", | |
1058 | area->p0.x, area->p0.y, | |
1059 | area->p1.x, area->p1.y); | |
1060 | } | |
1061 | } else { | |
1062 | seq_printf(m, " %d", obj->size); | |
1063 | } | |
1064 | ||
1065 | seq_printf(m, "\n"); | |
1066 | } | |
1067 | ||
1068 | void omap_gem_describe_objects(struct list_head *list, struct seq_file *m) | |
1069 | { | |
1070 | struct omap_gem_object *omap_obj; | |
1071 | int count = 0; | |
1072 | size_t size = 0; | |
1073 | ||
1074 | list_for_each_entry(omap_obj, list, mm_list) { | |
1075 | struct drm_gem_object *obj = &omap_obj->base; | |
1076 | seq_printf(m, " "); | |
1077 | omap_gem_describe(obj, m); | |
1078 | count++; | |
1079 | size += obj->size; | |
1080 | } | |
1081 | ||
1082 | seq_printf(m, "Total %d objects, %zu bytes\n", count, size); | |
1083 | } | |
1084 | #endif | |
1085 | ||
7ef93b0a LP |
1086 | /* ----------------------------------------------------------------------------- |
1087 | * Buffer Synchronization | |
cd5351f4 RC |
1088 | */ |
1089 | ||
7ef93b0a LP |
1090 | static DEFINE_SPINLOCK(sync_lock); |
1091 | ||
cd5351f4 RC |
1092 | struct omap_gem_sync_waiter { |
1093 | struct list_head list; | |
1094 | struct omap_gem_object *omap_obj; | |
1095 | enum omap_gem_op op; | |
1096 | uint32_t read_target, write_target; | |
1097 | /* notify called w/ sync_lock held */ | |
1098 | void (*notify)(void *arg); | |
1099 | void *arg; | |
1100 | }; | |
1101 | ||
1102 | /* list of omap_gem_sync_waiter.. the notify fxn gets called back when | |
1103 | * the read and/or write target count is achieved which can call a user | |
1104 | * callback (ex. to kick 3d and/or 2d), wakeup blocked task (prep for | |
1105 | * cpu access), etc. | |
1106 | */ | |
1107 | static LIST_HEAD(waiters); | |
1108 | ||
1109 | static inline bool is_waiting(struct omap_gem_sync_waiter *waiter) | |
1110 | { | |
1111 | struct omap_gem_object *omap_obj = waiter->omap_obj; | |
1112 | if ((waiter->op & OMAP_GEM_READ) && | |
f2cff0f3 | 1113 | (omap_obj->sync->write_complete < waiter->write_target)) |
cd5351f4 RC |
1114 | return true; |
1115 | if ((waiter->op & OMAP_GEM_WRITE) && | |
f2cff0f3 | 1116 | (omap_obj->sync->read_complete < waiter->read_target)) |
cd5351f4 RC |
1117 | return true; |
1118 | return false; | |
1119 | } | |
1120 | ||
1121 | /* macro for sync debug.. */ | |
1122 | #define SYNCDBG 0 | |
1123 | #define SYNC(fmt, ...) do { if (SYNCDBG) \ | |
1124 | printk(KERN_ERR "%s:%d: "fmt"\n", \ | |
1125 | __func__, __LINE__, ##__VA_ARGS__); \ | |
1126 | } while (0) | |
1127 | ||
1128 | ||
1129 | static void sync_op_update(void) | |
1130 | { | |
1131 | struct omap_gem_sync_waiter *waiter, *n; | |
1132 | list_for_each_entry_safe(waiter, n, &waiters, list) { | |
1133 | if (!is_waiting(waiter)) { | |
1134 | list_del(&waiter->list); | |
1135 | SYNC("notify: %p", waiter); | |
1136 | waiter->notify(waiter->arg); | |
1137 | kfree(waiter); | |
1138 | } | |
1139 | } | |
1140 | } | |
1141 | ||
1142 | static inline int sync_op(struct drm_gem_object *obj, | |
1143 | enum omap_gem_op op, bool start) | |
1144 | { | |
1145 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
1146 | int ret = 0; | |
1147 | ||
1148 | spin_lock(&sync_lock); | |
1149 | ||
1150 | if (!omap_obj->sync) { | |
1151 | omap_obj->sync = kzalloc(sizeof(*omap_obj->sync), GFP_ATOMIC); | |
1152 | if (!omap_obj->sync) { | |
1153 | ret = -ENOMEM; | |
1154 | goto unlock; | |
1155 | } | |
1156 | } | |
1157 | ||
1158 | if (start) { | |
1159 | if (op & OMAP_GEM_READ) | |
1160 | omap_obj->sync->read_pending++; | |
1161 | if (op & OMAP_GEM_WRITE) | |
1162 | omap_obj->sync->write_pending++; | |
1163 | } else { | |
1164 | if (op & OMAP_GEM_READ) | |
1165 | omap_obj->sync->read_complete++; | |
1166 | if (op & OMAP_GEM_WRITE) | |
1167 | omap_obj->sync->write_complete++; | |
1168 | sync_op_update(); | |
1169 | } | |
1170 | ||
1171 | unlock: | |
1172 | spin_unlock(&sync_lock); | |
1173 | ||
1174 | return ret; | |
1175 | } | |
1176 | ||
cd5351f4 RC |
1177 | /* mark the start of read and/or write operation */ |
1178 | int omap_gem_op_start(struct drm_gem_object *obj, enum omap_gem_op op) | |
1179 | { | |
1180 | return sync_op(obj, op, true); | |
1181 | } | |
1182 | ||
1183 | int omap_gem_op_finish(struct drm_gem_object *obj, enum omap_gem_op op) | |
1184 | { | |
1185 | return sync_op(obj, op, false); | |
1186 | } | |
1187 | ||
1188 | static DECLARE_WAIT_QUEUE_HEAD(sync_event); | |
1189 | ||
1190 | static void sync_notify(void *arg) | |
1191 | { | |
1192 | struct task_struct **waiter_task = arg; | |
1193 | *waiter_task = NULL; | |
1194 | wake_up_all(&sync_event); | |
1195 | } | |
1196 | ||
1197 | int omap_gem_op_sync(struct drm_gem_object *obj, enum omap_gem_op op) | |
1198 | { | |
1199 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
1200 | int ret = 0; | |
1201 | if (omap_obj->sync) { | |
1202 | struct task_struct *waiter_task = current; | |
1203 | struct omap_gem_sync_waiter *waiter = | |
1204 | kzalloc(sizeof(*waiter), GFP_KERNEL); | |
1205 | ||
ae053039 | 1206 | if (!waiter) |
cd5351f4 | 1207 | return -ENOMEM; |
cd5351f4 RC |
1208 | |
1209 | waiter->omap_obj = omap_obj; | |
1210 | waiter->op = op; | |
1211 | waiter->read_target = omap_obj->sync->read_pending; | |
1212 | waiter->write_target = omap_obj->sync->write_pending; | |
1213 | waiter->notify = sync_notify; | |
1214 | waiter->arg = &waiter_task; | |
1215 | ||
1216 | spin_lock(&sync_lock); | |
1217 | if (is_waiting(waiter)) { | |
1218 | SYNC("waited: %p", waiter); | |
1219 | list_add_tail(&waiter->list, &waiters); | |
1220 | spin_unlock(&sync_lock); | |
1221 | ret = wait_event_interruptible(sync_event, | |
1222 | (waiter_task == NULL)); | |
1223 | spin_lock(&sync_lock); | |
1224 | if (waiter_task) { | |
1225 | SYNC("interrupted: %p", waiter); | |
1226 | /* we were interrupted */ | |
1227 | list_del(&waiter->list); | |
1228 | waiter_task = NULL; | |
1229 | } else { | |
1230 | /* freed in sync_op_update() */ | |
1231 | waiter = NULL; | |
1232 | } | |
1233 | } | |
1234 | spin_unlock(&sync_lock); | |
d2c87e2d | 1235 | kfree(waiter); |
cd5351f4 RC |
1236 | } |
1237 | return ret; | |
1238 | } | |
1239 | ||
1240 | /* call fxn(arg), either synchronously or asynchronously if the op | |
1241 | * is currently blocked.. fxn() can be called from any context | |
1242 | * | |
1243 | * (TODO for now fxn is called back from whichever context calls | |
3f50effd | 1244 | * omap_gem_op_finish().. but this could be better defined later |
cd5351f4 RC |
1245 | * if needed) |
1246 | * | |
1247 | * TODO more code in common w/ _sync().. | |
1248 | */ | |
1249 | int omap_gem_op_async(struct drm_gem_object *obj, enum omap_gem_op op, | |
1250 | void (*fxn)(void *arg), void *arg) | |
1251 | { | |
1252 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
1253 | if (omap_obj->sync) { | |
1254 | struct omap_gem_sync_waiter *waiter = | |
1255 | kzalloc(sizeof(*waiter), GFP_ATOMIC); | |
1256 | ||
ae053039 | 1257 | if (!waiter) |
cd5351f4 | 1258 | return -ENOMEM; |
cd5351f4 RC |
1259 | |
1260 | waiter->omap_obj = omap_obj; | |
1261 | waiter->op = op; | |
1262 | waiter->read_target = omap_obj->sync->read_pending; | |
1263 | waiter->write_target = omap_obj->sync->write_pending; | |
1264 | waiter->notify = fxn; | |
1265 | waiter->arg = arg; | |
1266 | ||
1267 | spin_lock(&sync_lock); | |
1268 | if (is_waiting(waiter)) { | |
1269 | SYNC("waited: %p", waiter); | |
1270 | list_add_tail(&waiter->list, &waiters); | |
1271 | spin_unlock(&sync_lock); | |
1272 | return 0; | |
1273 | } | |
1274 | ||
1275 | spin_unlock(&sync_lock); | |
15ec2ca9 SP |
1276 | |
1277 | kfree(waiter); | |
cd5351f4 RC |
1278 | } |
1279 | ||
1280 | /* no waiting.. */ | |
1281 | fxn(arg); | |
1282 | ||
1283 | return 0; | |
1284 | } | |
1285 | ||
7ef93b0a LP |
1286 | /* ----------------------------------------------------------------------------- |
1287 | * Constructor & Destructor | |
1288 | */ | |
1289 | ||
cd5351f4 RC |
1290 | void omap_gem_free_object(struct drm_gem_object *obj) |
1291 | { | |
1292 | struct drm_device *dev = obj->dev; | |
76c4055f | 1293 | struct omap_drm_private *priv = dev->dev_private; |
cd5351f4 RC |
1294 | struct omap_gem_object *omap_obj = to_omap_bo(obj); |
1295 | ||
f7f9f453 RC |
1296 | evict(obj); |
1297 | ||
f6b6036e RC |
1298 | WARN_ON(!mutex_is_locked(&dev->struct_mutex)); |
1299 | ||
76c4055f | 1300 | spin_lock(&priv->list_lock); |
f6b6036e | 1301 | list_del(&omap_obj->mm_list); |
76c4055f | 1302 | spin_unlock(&priv->list_lock); |
f6b6036e | 1303 | |
9a0774e0 RC |
1304 | /* this means the object is still pinned.. which really should |
1305 | * not happen. I think.. | |
1306 | */ | |
1307 | WARN_ON(omap_obj->paddr_cnt > 0); | |
1308 | ||
3f50effd TV |
1309 | if (omap_obj->pages) { |
1310 | if (omap_obj->flags & OMAP_BO_MEM_DMABUF) | |
1311 | kfree(omap_obj->pages); | |
1312 | else | |
cd5351f4 | 1313 | omap_gem_detach_pages(obj); |
3f50effd | 1314 | } |
ae053039 | 1315 | |
3f50effd | 1316 | if (omap_obj->flags & OMAP_BO_MEM_DMA_API) { |
266c73b7 LT |
1317 | dma_free_wc(dev->dev, obj->size, omap_obj->vaddr, |
1318 | omap_obj->paddr); | |
3f50effd TV |
1319 | } else if (omap_obj->vaddr) { |
1320 | vunmap(omap_obj->vaddr); | |
1321 | } else if (obj->import_attach) { | |
1322 | drm_prime_gem_destroy(obj, omap_obj->sgt); | |
cd5351f4 RC |
1323 | } |
1324 | ||
3f50effd | 1325 | kfree(omap_obj->sync); |
cd5351f4 RC |
1326 | |
1327 | drm_gem_object_release(obj); | |
1328 | ||
00e9c7c7 | 1329 | kfree(omap_obj); |
cd5351f4 RC |
1330 | } |
1331 | ||
1332 | /* GEM buffer object constructor */ | |
1333 | struct drm_gem_object *omap_gem_new(struct drm_device *dev, | |
1334 | union omap_gem_size gsize, uint32_t flags) | |
1335 | { | |
a6a91827 | 1336 | struct omap_drm_private *priv = dev->dev_private; |
cd5351f4 | 1337 | struct omap_gem_object *omap_obj; |
92b4b445 | 1338 | struct drm_gem_object *obj; |
ab5a60c3 | 1339 | struct address_space *mapping; |
cd5351f4 RC |
1340 | size_t size; |
1341 | int ret; | |
1342 | ||
9cba3b99 | 1343 | /* Validate the flags and compute the memory and cache flags. */ |
cd5351f4 | 1344 | if (flags & OMAP_BO_TILED) { |
f4302747 | 1345 | if (!priv->usergart) { |
f7f9f453 | 1346 | dev_err(dev->dev, "Tiled buffers require DMM\n"); |
92b4b445 | 1347 | return NULL; |
f7f9f453 RC |
1348 | } |
1349 | ||
9cba3b99 LP |
1350 | /* |
1351 | * Tiled buffers are always shmem paged backed. When they are | |
1352 | * scanned out, they are remapped into DMM/TILER. | |
f7f9f453 RC |
1353 | */ |
1354 | flags &= ~OMAP_BO_SCANOUT; | |
9cba3b99 | 1355 | flags |= OMAP_BO_MEM_SHMEM; |
f7f9f453 | 1356 | |
9cba3b99 LP |
1357 | /* |
1358 | * Currently don't allow cached buffers. There is some caching | |
1359 | * stuff that needs to be handled better. | |
f7f9f453 | 1360 | */ |
7cb0d6c1 TV |
1361 | flags &= ~(OMAP_BO_CACHED|OMAP_BO_WC|OMAP_BO_UNCACHED); |
1362 | flags |= tiler_get_cpu_cache_flags(); | |
9cba3b99 LP |
1363 | } else if ((flags & OMAP_BO_SCANOUT) && !priv->has_dmm) { |
1364 | /* | |
b22e6690 LP |
1365 | * OMAP_BO_SCANOUT hints that the buffer doesn't need to be |
1366 | * tiled. However, to lower the pressure on memory allocation, | |
1367 | * use contiguous memory only if no TILER is available. | |
9cba3b99 LP |
1368 | */ |
1369 | flags |= OMAP_BO_MEM_DMA_API; | |
3f50effd | 1370 | } else if (!(flags & OMAP_BO_MEM_DMABUF)) { |
9cba3b99 | 1371 | /* |
3f50effd | 1372 | * All other buffers not backed by dma_buf are shmem-backed. |
9cba3b99 LP |
1373 | */ |
1374 | flags |= OMAP_BO_MEM_SHMEM; | |
f7f9f453 | 1375 | } |
cd5351f4 | 1376 | |
9cba3b99 | 1377 | /* Allocate the initialize the OMAP GEM object. */ |
cd5351f4 | 1378 | omap_obj = kzalloc(sizeof(*omap_obj), GFP_KERNEL); |
78110bb8 | 1379 | if (!omap_obj) |
a903e3b6 | 1380 | return NULL; |
f6b6036e | 1381 | |
cd5351f4 | 1382 | obj = &omap_obj->base; |
9cba3b99 | 1383 | omap_obj->flags = flags; |
cd5351f4 | 1384 | |
9cba3b99 LP |
1385 | if (flags & OMAP_BO_TILED) { |
1386 | /* | |
1387 | * For tiled buffers align dimensions to slot boundaries and | |
1388 | * calculate size based on aligned dimensions. | |
a6a91827 | 1389 | */ |
9cba3b99 LP |
1390 | tiler_align(gem2fmt(flags), &gsize.tiled.width, |
1391 | &gsize.tiled.height); | |
ae053039 | 1392 | |
9cba3b99 LP |
1393 | size = tiler_size(gem2fmt(flags), gsize.tiled.width, |
1394 | gsize.tiled.height); | |
cd5351f4 | 1395 | |
f7f9f453 RC |
1396 | omap_obj->width = gsize.tiled.width; |
1397 | omap_obj->height = gsize.tiled.height; | |
9cba3b99 LP |
1398 | } else { |
1399 | size = PAGE_ALIGN(gsize.bytes); | |
f7f9f453 RC |
1400 | } |
1401 | ||
9cba3b99 LP |
1402 | /* Initialize the GEM object. */ |
1403 | if (!(flags & OMAP_BO_MEM_SHMEM)) { | |
89c8233f | 1404 | drm_gem_private_object_init(dev, obj, size); |
ab5a60c3 | 1405 | } else { |
cd5351f4 | 1406 | ret = drm_gem_object_init(dev, obj, size); |
ab5a60c3 | 1407 | if (ret) |
c2eb77ff | 1408 | goto err_free; |
cd5351f4 | 1409 | |
ab5a60c3 DH |
1410 | mapping = file_inode(obj->filp)->i_mapping; |
1411 | mapping_set_gfp_mask(mapping, GFP_USER | __GFP_DMA32); | |
1412 | } | |
cd5351f4 | 1413 | |
c2eb77ff LP |
1414 | /* Allocate memory if needed. */ |
1415 | if (flags & OMAP_BO_MEM_DMA_API) { | |
266c73b7 LT |
1416 | omap_obj->vaddr = dma_alloc_wc(dev->dev, size, |
1417 | &omap_obj->paddr, | |
1418 | GFP_KERNEL); | |
c2eb77ff LP |
1419 | if (!omap_obj->vaddr) |
1420 | goto err_release; | |
1421 | } | |
1422 | ||
1423 | spin_lock(&priv->list_lock); | |
1424 | list_add(&omap_obj->mm_list, &priv->obj_list); | |
1425 | spin_unlock(&priv->list_lock); | |
1426 | ||
cd5351f4 RC |
1427 | return obj; |
1428 | ||
c2eb77ff LP |
1429 | err_release: |
1430 | drm_gem_object_release(obj); | |
1431 | err_free: | |
1432 | kfree(omap_obj); | |
cd5351f4 RC |
1433 | return NULL; |
1434 | } | |
f7f9f453 | 1435 | |
b22e6690 LP |
1436 | struct drm_gem_object *omap_gem_new_dmabuf(struct drm_device *dev, size_t size, |
1437 | struct sg_table *sgt) | |
1438 | { | |
1439 | struct omap_drm_private *priv = dev->dev_private; | |
1440 | struct omap_gem_object *omap_obj; | |
1441 | struct drm_gem_object *obj; | |
1442 | union omap_gem_size gsize; | |
1443 | ||
1444 | /* Without a DMM only physically contiguous buffers can be supported. */ | |
1445 | if (sgt->orig_nents != 1 && !priv->has_dmm) | |
1446 | return ERR_PTR(-EINVAL); | |
1447 | ||
1448 | mutex_lock(&dev->struct_mutex); | |
1449 | ||
1450 | gsize.bytes = PAGE_ALIGN(size); | |
1451 | obj = omap_gem_new(dev, gsize, OMAP_BO_MEM_DMABUF | OMAP_BO_WC); | |
1452 | if (!obj) { | |
1453 | obj = ERR_PTR(-ENOMEM); | |
1454 | goto done; | |
1455 | } | |
1456 | ||
1457 | omap_obj = to_omap_bo(obj); | |
1458 | omap_obj->sgt = sgt; | |
1459 | ||
1460 | if (sgt->orig_nents == 1) { | |
1461 | omap_obj->paddr = sg_dma_address(sgt->sgl); | |
1462 | } else { | |
1463 | /* Create pages list from sgt */ | |
1464 | struct sg_page_iter iter; | |
1465 | struct page **pages; | |
1466 | unsigned int npages; | |
1467 | unsigned int i = 0; | |
1468 | ||
1469 | npages = DIV_ROUND_UP(size, PAGE_SIZE); | |
1470 | pages = kcalloc(npages, sizeof(*pages), GFP_KERNEL); | |
1471 | if (!pages) { | |
1472 | omap_gem_free_object(obj); | |
1473 | obj = ERR_PTR(-ENOMEM); | |
1474 | goto done; | |
1475 | } | |
1476 | ||
1477 | omap_obj->pages = pages; | |
1478 | ||
1479 | for_each_sg_page(sgt->sgl, &iter, sgt->orig_nents, 0) { | |
1480 | pages[i++] = sg_page_iter_page(&iter); | |
1481 | if (i > npages) | |
1482 | break; | |
1483 | } | |
1484 | ||
1485 | if (WARN_ON(i != npages)) { | |
1486 | omap_gem_free_object(obj); | |
1487 | obj = ERR_PTR(-ENOMEM); | |
1488 | goto done; | |
1489 | } | |
1490 | } | |
1491 | ||
1492 | done: | |
1493 | mutex_unlock(&dev->struct_mutex); | |
1494 | return obj; | |
1495 | } | |
1496 | ||
7ef93b0a LP |
1497 | /* convenience method to construct a GEM buffer object, and userspace handle */ |
1498 | int omap_gem_new_handle(struct drm_device *dev, struct drm_file *file, | |
1499 | union omap_gem_size gsize, uint32_t flags, uint32_t *handle) | |
1500 | { | |
1501 | struct drm_gem_object *obj; | |
1502 | int ret; | |
1503 | ||
1504 | obj = omap_gem_new(dev, gsize, flags); | |
1505 | if (!obj) | |
1506 | return -ENOMEM; | |
1507 | ||
1508 | ret = drm_gem_handle_create(file, obj, handle); | |
1509 | if (ret) { | |
cd5351f4 | 1510 | omap_gem_free_object(obj); |
7ef93b0a LP |
1511 | return ret; |
1512 | } | |
ae053039 | 1513 | |
7ef93b0a LP |
1514 | /* drop reference from allocate - handle holds it now */ |
1515 | drm_gem_object_unreference_unlocked(obj); | |
1516 | ||
1517 | return 0; | |
cd5351f4 | 1518 | } |
f7f9f453 | 1519 | |
7ef93b0a LP |
1520 | /* ----------------------------------------------------------------------------- |
1521 | * Init & Cleanup | |
1522 | */ | |
1523 | ||
1524 | /* If DMM is used, we need to set some stuff up.. */ | |
f7f9f453 RC |
1525 | void omap_gem_init(struct drm_device *dev) |
1526 | { | |
a6a91827 | 1527 | struct omap_drm_private *priv = dev->dev_private; |
f4302747 | 1528 | struct omap_drm_usergart *usergart; |
f7f9f453 RC |
1529 | const enum tiler_fmt fmts[] = { |
1530 | TILFMT_8BIT, TILFMT_16BIT, TILFMT_32BIT | |
1531 | }; | |
5c137797 | 1532 | int i, j; |
f7f9f453 | 1533 | |
e5e4e9b7 | 1534 | if (!dmm_is_available()) { |
f7f9f453 | 1535 | /* DMM only supported on OMAP4 and later, so this isn't fatal */ |
5c137797 | 1536 | dev_warn(dev->dev, "DMM not available, disable DMM support\n"); |
f7f9f453 RC |
1537 | return; |
1538 | } | |
1539 | ||
78110bb8 JP |
1540 | usergart = kcalloc(3, sizeof(*usergart), GFP_KERNEL); |
1541 | if (!usergart) | |
b369839b | 1542 | return; |
f7f9f453 RC |
1543 | |
1544 | /* reserve 4k aligned/wide regions for userspace mappings: */ | |
1545 | for (i = 0; i < ARRAY_SIZE(fmts); i++) { | |
1546 | uint16_t h = 1, w = PAGE_SIZE >> i; | |
1547 | tiler_align(fmts[i], &w, &h); | |
1548 | /* note: since each region is 1 4kb page wide, and minimum | |
1549 | * number of rows, the height ends up being the same as the | |
1550 | * # of pages in the region | |
1551 | */ | |
1552 | usergart[i].height = h; | |
1553 | usergart[i].height_shift = ilog2(h); | |
3c810c61 | 1554 | usergart[i].stride_pfn = tiler_stride(fmts[i], 0) >> PAGE_SHIFT; |
f7f9f453 RC |
1555 | usergart[i].slot_shift = ilog2((PAGE_SIZE / h) >> i); |
1556 | for (j = 0; j < NUM_USERGART_ENTRIES; j++) { | |
f4302747 LP |
1557 | struct omap_drm_usergart_entry *entry; |
1558 | struct tiler_block *block; | |
1559 | ||
1560 | entry = &usergart[i].entry[j]; | |
1561 | block = tiler_reserve_2d(fmts[i], w, h, PAGE_SIZE); | |
f7f9f453 RC |
1562 | if (IS_ERR(block)) { |
1563 | dev_err(dev->dev, | |
1564 | "reserve failed: %d, %d, %ld\n", | |
1565 | i, j, PTR_ERR(block)); | |
1566 | return; | |
1567 | } | |
1568 | entry->paddr = tiler_ssptr(block); | |
1569 | entry->block = block; | |
1570 | ||
2d31ca3a RK |
1571 | DBG("%d:%d: %dx%d: paddr=%pad stride=%d", i, j, w, h, |
1572 | &entry->paddr, | |
f7f9f453 RC |
1573 | usergart[i].stride_pfn << PAGE_SHIFT); |
1574 | } | |
1575 | } | |
a6a91827 | 1576 | |
f4302747 | 1577 | priv->usergart = usergart; |
a6a91827 | 1578 | priv->has_dmm = true; |
f7f9f453 RC |
1579 | } |
1580 | ||
1581 | void omap_gem_deinit(struct drm_device *dev) | |
1582 | { | |
f4302747 LP |
1583 | struct omap_drm_private *priv = dev->dev_private; |
1584 | ||
f7f9f453 RC |
1585 | /* I believe we can rely on there being no more outstanding GEM |
1586 | * objects which could depend on usergart/dmm at this point. | |
1587 | */ | |
f4302747 | 1588 | kfree(priv->usergart); |
f7f9f453 | 1589 | } |