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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 | /** |
16869083 | 53 | * dma_addr 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 | * | |
16869083 | 61 | * - buffers mapped through the TILER when dma_addr_cnt is not zero, in |
b22e6690 LP |
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 | |
16869083 | 68 | * TILER aperture. As TILER mappings are refcounted (through |
bc20c85c LP |
69 | * dma_addr_cnt) the DMA address must be accessed through omap_gem_pin() |
70 | * to ensure that the mapping won't disappear unexpectedly. References | |
71 | * must be released with omap_gem_unpin(). | |
cd5351f4 | 72 | */ |
16869083 | 73 | dma_addr_t dma_addr; |
cd5351f4 | 74 | |
f7f9f453 | 75 | /** |
16869083 | 76 | * # of users of dma_addr |
f7f9f453 | 77 | */ |
16869083 | 78 | uint32_t dma_addr_cnt; |
f7f9f453 | 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 | 97 | /** addresses corresponding to pages in above array */ |
57c22f7c | 98 | dma_addr_t *dma_addrs; |
f3bc9d24 | 99 | |
cd5351f4 RC |
100 | /** |
101 | * Virtual address, if mapped. | |
102 | */ | |
103 | void *vaddr; | |
cd5351f4 RC |
104 | }; |
105 | ||
7ef93b0a | 106 | #define to_omap_bo(x) container_of(x, struct omap_gem_object, base) |
c5b1247b | 107 | |
f7f9f453 RC |
108 | /* To deal with userspace mmap'ings of 2d tiled buffers, which (a) are |
109 | * not necessarily pinned in TILER all the time, and (b) when they are | |
110 | * they are not necessarily page aligned, we reserve one or more small | |
111 | * regions in each of the 2d containers to use as a user-GART where we | |
112 | * can create a second page-aligned mapping of parts of the buffer | |
113 | * being accessed from userspace. | |
114 | * | |
115 | * Note that we could optimize slightly when we know that multiple | |
116 | * tiler containers are backed by the same PAT.. but I'll leave that | |
117 | * for later.. | |
118 | */ | |
119 | #define NUM_USERGART_ENTRIES 2 | |
f4302747 | 120 | struct omap_drm_usergart_entry { |
f7f9f453 | 121 | struct tiler_block *block; /* the reserved tiler block */ |
16869083 | 122 | dma_addr_t dma_addr; |
f7f9f453 RC |
123 | struct drm_gem_object *obj; /* the current pinned obj */ |
124 | pgoff_t obj_pgoff; /* page offset of obj currently | |
125 | mapped in */ | |
126 | }; | |
f4302747 LP |
127 | |
128 | struct omap_drm_usergart { | |
129 | struct omap_drm_usergart_entry entry[NUM_USERGART_ENTRIES]; | |
f7f9f453 RC |
130 | int height; /* height in rows */ |
131 | int height_shift; /* ilog2(height in rows) */ | |
132 | int slot_shift; /* ilog2(width per slot) */ | |
133 | int stride_pfn; /* stride in pages */ | |
134 | int last; /* index of last used entry */ | |
f4302747 | 135 | }; |
f7f9f453 | 136 | |
b902f8f4 LP |
137 | /* ----------------------------------------------------------------------------- |
138 | * Helpers | |
139 | */ | |
140 | ||
141 | /** get mmap offset */ | |
142 | static uint64_t mmap_offset(struct drm_gem_object *obj) | |
143 | { | |
144 | struct drm_device *dev = obj->dev; | |
145 | int ret; | |
146 | size_t size; | |
147 | ||
148 | WARN_ON(!mutex_is_locked(&dev->struct_mutex)); | |
149 | ||
150 | /* Make it mmapable */ | |
151 | size = omap_gem_mmap_size(obj); | |
152 | ret = drm_gem_create_mmap_offset_size(obj, size); | |
153 | if (ret) { | |
154 | dev_err(dev->dev, "could not allocate mmap offset\n"); | |
155 | return 0; | |
156 | } | |
157 | ||
158 | return drm_vma_node_offset_addr(&obj->vma_node); | |
159 | } | |
160 | ||
b22e6690 | 161 | static bool is_contiguous(struct omap_gem_object *omap_obj) |
7ef93b0a | 162 | { |
b22e6690 LP |
163 | if (omap_obj->flags & OMAP_BO_MEM_DMA_API) |
164 | return true; | |
165 | ||
166 | if ((omap_obj->flags & OMAP_BO_MEM_DMABUF) && omap_obj->sgt->nents == 1) | |
167 | return true; | |
168 | ||
169 | return false; | |
7ef93b0a LP |
170 | } |
171 | ||
172 | /* ----------------------------------------------------------------------------- | |
173 | * Eviction | |
174 | */ | |
f7f9f453 RC |
175 | |
176 | static void evict_entry(struct drm_gem_object *obj, | |
f4302747 | 177 | enum tiler_fmt fmt, struct omap_drm_usergart_entry *entry) |
f7f9f453 | 178 | { |
6796cb16 | 179 | struct omap_gem_object *omap_obj = to_omap_bo(obj); |
f4302747 LP |
180 | struct omap_drm_private *priv = obj->dev->dev_private; |
181 | int n = priv->usergart[fmt].height; | |
6796cb16 DH |
182 | size_t size = PAGE_SIZE * n; |
183 | loff_t off = mmap_offset(obj) + | |
184 | (entry->obj_pgoff << PAGE_SHIFT); | |
cc8dd766 | 185 | const int m = DIV_ROUND_UP(omap_obj->width << fmt, PAGE_SIZE); |
6796cb16 DH |
186 | |
187 | if (m > 1) { | |
188 | int i; | |
189 | /* if stride > than PAGE_SIZE then sparse mapping: */ | |
190 | for (i = n; i > 0; i--) { | |
191 | unmap_mapping_range(obj->dev->anon_inode->i_mapping, | |
192 | off, PAGE_SIZE, 1); | |
193 | off += PAGE_SIZE * m; | |
e559895a | 194 | } |
6796cb16 DH |
195 | } else { |
196 | unmap_mapping_range(obj->dev->anon_inode->i_mapping, | |
197 | off, size, 1); | |
f7f9f453 RC |
198 | } |
199 | ||
200 | entry->obj = NULL; | |
201 | } | |
202 | ||
203 | /* Evict a buffer from usergart, if it is mapped there */ | |
204 | static void evict(struct drm_gem_object *obj) | |
205 | { | |
206 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
f4302747 | 207 | struct omap_drm_private *priv = obj->dev->dev_private; |
f7f9f453 RC |
208 | |
209 | if (omap_obj->flags & OMAP_BO_TILED) { | |
210 | enum tiler_fmt fmt = gem2fmt(omap_obj->flags); | |
211 | int i; | |
212 | ||
f7f9f453 | 213 | for (i = 0; i < NUM_USERGART_ENTRIES; i++) { |
f4302747 LP |
214 | struct omap_drm_usergart_entry *entry = |
215 | &priv->usergart[fmt].entry[i]; | |
216 | ||
f7f9f453 RC |
217 | if (entry->obj == obj) |
218 | evict_entry(obj, fmt, entry); | |
219 | } | |
220 | } | |
221 | } | |
222 | ||
7ef93b0a LP |
223 | /* ----------------------------------------------------------------------------- |
224 | * Page Management | |
8b6b569e | 225 | */ |
cd5351f4 RC |
226 | |
227 | /** ensure backing pages are allocated */ | |
228 | static int omap_gem_attach_pages(struct drm_gem_object *obj) | |
229 | { | |
8b6b569e | 230 | struct drm_device *dev = obj->dev; |
cd5351f4 RC |
231 | struct omap_gem_object *omap_obj = to_omap_bo(obj); |
232 | struct page **pages; | |
d4eb23a9 EG |
233 | int npages = obj->size >> PAGE_SHIFT; |
234 | int i, ret; | |
8b6b569e | 235 | dma_addr_t *addrs; |
cd5351f4 RC |
236 | |
237 | WARN_ON(omap_obj->pages); | |
238 | ||
0cdbe8ac | 239 | pages = drm_gem_get_pages(obj); |
cd5351f4 RC |
240 | if (IS_ERR(pages)) { |
241 | dev_err(obj->dev->dev, "could not get pages: %ld\n", PTR_ERR(pages)); | |
242 | return PTR_ERR(pages); | |
243 | } | |
244 | ||
f3bc9d24 RC |
245 | /* for non-cached buffers, ensure the new pages are clean because |
246 | * DSS, GPU, etc. are not cache coherent: | |
247 | */ | |
248 | if (omap_obj->flags & (OMAP_BO_WC|OMAP_BO_UNCACHED)) { | |
23d84ed9 | 249 | addrs = kmalloc(npages * sizeof(*addrs), GFP_KERNEL); |
d4eb23a9 EG |
250 | if (!addrs) { |
251 | ret = -ENOMEM; | |
252 | goto free_pages; | |
253 | } | |
254 | ||
f3bc9d24 | 255 | for (i = 0; i < npages; i++) { |
8b6b569e | 256 | addrs[i] = dma_map_page(dev->dev, pages[i], |
97817fd4 | 257 | 0, PAGE_SIZE, DMA_TO_DEVICE); |
579ef254 TV |
258 | |
259 | if (dma_mapping_error(dev->dev, addrs[i])) { | |
260 | dev_warn(dev->dev, | |
261 | "%s: failed to map page\n", __func__); | |
262 | ||
263 | for (i = i - 1; i >= 0; --i) { | |
264 | dma_unmap_page(dev->dev, addrs[i], | |
97817fd4 | 265 | PAGE_SIZE, DMA_TO_DEVICE); |
579ef254 TV |
266 | } |
267 | ||
268 | ret = -ENOMEM; | |
269 | goto free_addrs; | |
270 | } | |
f3bc9d24 | 271 | } |
8b6b569e | 272 | } else { |
23d84ed9 | 273 | addrs = kzalloc(npages * sizeof(*addrs), GFP_KERNEL); |
d4eb23a9 EG |
274 | if (!addrs) { |
275 | ret = -ENOMEM; | |
276 | goto free_pages; | |
277 | } | |
f3bc9d24 RC |
278 | } |
279 | ||
57c22f7c | 280 | omap_obj->dma_addrs = addrs; |
cd5351f4 | 281 | omap_obj->pages = pages; |
8b6b569e | 282 | |
cd5351f4 | 283 | return 0; |
d4eb23a9 | 284 | |
579ef254 TV |
285 | free_addrs: |
286 | kfree(addrs); | |
d4eb23a9 | 287 | free_pages: |
ddcd09d6 | 288 | drm_gem_put_pages(obj, pages, true, false); |
d4eb23a9 EG |
289 | |
290 | return ret; | |
cd5351f4 RC |
291 | } |
292 | ||
b902f8f4 LP |
293 | /* acquire pages when needed (for example, for DMA where physically |
294 | * contiguous buffer is not required | |
295 | */ | |
296 | static int get_pages(struct drm_gem_object *obj, struct page ***pages) | |
297 | { | |
298 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
299 | int ret = 0; | |
300 | ||
cdb0381d | 301 | if ((omap_obj->flags & OMAP_BO_MEM_SHMEM) && !omap_obj->pages) { |
b902f8f4 LP |
302 | ret = omap_gem_attach_pages(obj); |
303 | if (ret) { | |
304 | dev_err(obj->dev->dev, "could not attach pages\n"); | |
305 | return ret; | |
306 | } | |
307 | } | |
308 | ||
309 | /* TODO: even phys-contig.. we should have a list of pages? */ | |
310 | *pages = omap_obj->pages; | |
311 | ||
312 | return 0; | |
313 | } | |
314 | ||
cd5351f4 RC |
315 | /** release backing pages */ |
316 | static void omap_gem_detach_pages(struct drm_gem_object *obj) | |
317 | { | |
318 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
930dc19c LP |
319 | unsigned int npages = obj->size >> PAGE_SHIFT; |
320 | unsigned int i; | |
f3bc9d24 | 321 | |
930dc19c LP |
322 | for (i = 0; i < npages; i++) { |
323 | if (omap_obj->dma_addrs[i]) | |
324 | dma_unmap_page(obj->dev->dev, omap_obj->dma_addrs[i], | |
97817fd4 | 325 | PAGE_SIZE, DMA_TO_DEVICE); |
f3bc9d24 RC |
326 | } |
327 | ||
57c22f7c LP |
328 | kfree(omap_obj->dma_addrs); |
329 | omap_obj->dma_addrs = NULL; | |
8b6b569e | 330 | |
ddcd09d6 | 331 | drm_gem_put_pages(obj, omap_obj->pages, true, false); |
cd5351f4 RC |
332 | omap_obj->pages = NULL; |
333 | } | |
334 | ||
6ad11bc3 RC |
335 | /* get buffer flags */ |
336 | uint32_t omap_gem_flags(struct drm_gem_object *obj) | |
337 | { | |
338 | return to_omap_bo(obj)->flags; | |
339 | } | |
340 | ||
c5b1247b RC |
341 | uint64_t omap_gem_mmap_offset(struct drm_gem_object *obj) |
342 | { | |
343 | uint64_t offset; | |
344 | mutex_lock(&obj->dev->struct_mutex); | |
345 | offset = mmap_offset(obj); | |
346 | mutex_unlock(&obj->dev->struct_mutex); | |
347 | return offset; | |
348 | } | |
349 | ||
f7f9f453 RC |
350 | /** get mmap size */ |
351 | size_t omap_gem_mmap_size(struct drm_gem_object *obj) | |
352 | { | |
353 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
354 | size_t size = obj->size; | |
355 | ||
356 | if (omap_obj->flags & OMAP_BO_TILED) { | |
357 | /* for tiled buffers, the virtual size has stride rounded up | |
358 | * to 4kb.. (to hide the fact that row n+1 might start 16kb or | |
359 | * 32kb later!). But we don't back the entire buffer with | |
360 | * pages, only the valid picture part.. so need to adjust for | |
361 | * this in the size used to mmap and generate mmap offset | |
362 | */ | |
363 | size = tiler_vsize(gem2fmt(omap_obj->flags), | |
364 | omap_obj->width, omap_obj->height); | |
365 | } | |
366 | ||
367 | return size; | |
368 | } | |
369 | ||
7ef93b0a LP |
370 | /* ----------------------------------------------------------------------------- |
371 | * Fault Handling | |
372 | */ | |
373 | ||
f7f9f453 RC |
374 | /* Normal handling for the case of faulting in non-tiled buffers */ |
375 | static int fault_1d(struct drm_gem_object *obj, | |
376 | struct vm_area_struct *vma, struct vm_fault *vmf) | |
377 | { | |
378 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
379 | unsigned long pfn; | |
380 | pgoff_t pgoff; | |
381 | ||
382 | /* We don't use vmf->pgoff since that has the fake offset: */ | |
1a29d85e | 383 | pgoff = (vmf->address - vma->vm_start) >> PAGE_SHIFT; |
f7f9f453 RC |
384 | |
385 | if (omap_obj->pages) { | |
d61ce7da | 386 | omap_gem_cpu_sync_page(obj, pgoff); |
f7f9f453 RC |
387 | pfn = page_to_pfn(omap_obj->pages[pgoff]); |
388 | } else { | |
b22e6690 | 389 | BUG_ON(!is_contiguous(omap_obj)); |
16869083 | 390 | pfn = (omap_obj->dma_addr >> PAGE_SHIFT) + pgoff; |
f7f9f453 RC |
391 | } |
392 | ||
1a29d85e | 393 | VERB("Inserting %p pfn %lx, pa %lx", (void *)vmf->address, |
f7f9f453 RC |
394 | pfn, pfn << PAGE_SHIFT); |
395 | ||
1a29d85e | 396 | return vm_insert_mixed(vma, vmf->address, __pfn_to_pfn_t(pfn, PFN_DEV)); |
f7f9f453 RC |
397 | } |
398 | ||
399 | /* Special handling for the case of faulting in 2d tiled buffers */ | |
400 | static int fault_2d(struct drm_gem_object *obj, | |
401 | struct vm_area_struct *vma, struct vm_fault *vmf) | |
402 | { | |
403 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
f4302747 LP |
404 | struct omap_drm_private *priv = obj->dev->dev_private; |
405 | struct omap_drm_usergart_entry *entry; | |
f7f9f453 RC |
406 | enum tiler_fmt fmt = gem2fmt(omap_obj->flags); |
407 | struct page *pages[64]; /* XXX is this too much to have on stack? */ | |
408 | unsigned long pfn; | |
409 | pgoff_t pgoff, base_pgoff; | |
1a29d85e | 410 | unsigned long vaddr; |
f7f9f453 RC |
411 | int i, ret, slots; |
412 | ||
e559895a RC |
413 | /* |
414 | * Note the height of the slot is also equal to the number of pages | |
415 | * that need to be mapped in to fill 4kb wide CPU page. If the slot | |
416 | * height is 64, then 64 pages fill a 4kb wide by 64 row region. | |
417 | */ | |
f4302747 LP |
418 | const int n = priv->usergart[fmt].height; |
419 | const int n_shift = priv->usergart[fmt].height_shift; | |
e559895a RC |
420 | |
421 | /* | |
422 | * If buffer width in bytes > PAGE_SIZE then the virtual stride is | |
423 | * rounded up to next multiple of PAGE_SIZE.. this need to be taken | |
424 | * into account in some of the math, so figure out virtual stride | |
425 | * in pages | |
f7f9f453 | 426 | */ |
cc8dd766 | 427 | const int m = DIV_ROUND_UP(omap_obj->width << fmt, PAGE_SIZE); |
f7f9f453 RC |
428 | |
429 | /* We don't use vmf->pgoff since that has the fake offset: */ | |
1a29d85e | 430 | pgoff = (vmf->address - vma->vm_start) >> PAGE_SHIFT; |
f7f9f453 | 431 | |
e559895a RC |
432 | /* |
433 | * Actual address we start mapping at is rounded down to previous slot | |
f7f9f453 RC |
434 | * boundary in the y direction: |
435 | */ | |
e559895a | 436 | base_pgoff = round_down(pgoff, m << n_shift); |
f7f9f453 | 437 | |
e559895a | 438 | /* figure out buffer width in slots */ |
f4302747 | 439 | slots = omap_obj->width >> priv->usergart[fmt].slot_shift; |
f7f9f453 | 440 | |
1a29d85e | 441 | vaddr = vmf->address - ((pgoff - base_pgoff) << PAGE_SHIFT); |
e559895a | 442 | |
f4302747 | 443 | entry = &priv->usergart[fmt].entry[priv->usergart[fmt].last]; |
e559895a | 444 | |
f7f9f453 RC |
445 | /* evict previous buffer using this usergart entry, if any: */ |
446 | if (entry->obj) | |
447 | evict_entry(entry->obj, fmt, entry); | |
448 | ||
449 | entry->obj = obj; | |
450 | entry->obj_pgoff = base_pgoff; | |
451 | ||
e559895a RC |
452 | /* now convert base_pgoff to phys offset from virt offset: */ |
453 | base_pgoff = (base_pgoff >> n_shift) * slots; | |
454 | ||
455 | /* for wider-than 4k.. figure out which part of the slot-row we want: */ | |
456 | if (m > 1) { | |
457 | int off = pgoff % m; | |
458 | entry->obj_pgoff += off; | |
459 | base_pgoff /= m; | |
460 | slots = min(slots - (off << n_shift), n); | |
461 | base_pgoff += off << n_shift; | |
462 | vaddr += off << PAGE_SHIFT; | |
463 | } | |
464 | ||
465 | /* | |
466 | * Map in pages. Beyond the valid pixel part of the buffer, we set | |
467 | * pages[i] to NULL to get a dummy page mapped in.. if someone | |
468 | * reads/writes it they will get random/undefined content, but at | |
469 | * least it won't be corrupting whatever other random page used to | |
470 | * be mapped in, or other undefined behavior. | |
f7f9f453 RC |
471 | */ |
472 | memcpy(pages, &omap_obj->pages[base_pgoff], | |
473 | sizeof(struct page *) * slots); | |
474 | memset(pages + slots, 0, | |
e559895a | 475 | sizeof(struct page *) * (n - slots)); |
f7f9f453 | 476 | |
a6a91827 | 477 | ret = tiler_pin(entry->block, pages, ARRAY_SIZE(pages), 0, true); |
f7f9f453 RC |
478 | if (ret) { |
479 | dev_err(obj->dev->dev, "failed to pin: %d\n", ret); | |
480 | return ret; | |
481 | } | |
482 | ||
16869083 | 483 | pfn = entry->dma_addr >> PAGE_SHIFT; |
f7f9f453 | 484 | |
1a29d85e | 485 | VERB("Inserting %p pfn %lx, pa %lx", (void *)vmf->address, |
f7f9f453 RC |
486 | pfn, pfn << PAGE_SHIFT); |
487 | ||
e559895a | 488 | for (i = n; i > 0; i--) { |
1a29d85e | 489 | vm_insert_mixed(vma, vaddr, __pfn_to_pfn_t(pfn, PFN_DEV)); |
f4302747 | 490 | pfn += priv->usergart[fmt].stride_pfn; |
e559895a | 491 | vaddr += PAGE_SIZE * m; |
f7f9f453 RC |
492 | } |
493 | ||
494 | /* simple round-robin: */ | |
f4302747 LP |
495 | priv->usergart[fmt].last = (priv->usergart[fmt].last + 1) |
496 | % NUM_USERGART_ENTRIES; | |
f7f9f453 RC |
497 | |
498 | return 0; | |
499 | } | |
500 | ||
cd5351f4 RC |
501 | /** |
502 | * omap_gem_fault - pagefault handler for GEM objects | |
cd5351f4 RC |
503 | * @vmf: fault detail |
504 | * | |
505 | * Invoked when a fault occurs on an mmap of a GEM managed area. GEM | |
506 | * does most of the work for us including the actual map/unmap calls | |
507 | * but we need to do the actual page work. | |
508 | * | |
509 | * The VMA was set up by GEM. In doing so it also ensured that the | |
510 | * vma->vm_private_data points to the GEM object that is backing this | |
511 | * mapping. | |
512 | */ | |
11bac800 | 513 | int omap_gem_fault(struct vm_fault *vmf) |
cd5351f4 | 514 | { |
11bac800 | 515 | struct vm_area_struct *vma = vmf->vma; |
cd5351f4 RC |
516 | struct drm_gem_object *obj = vma->vm_private_data; |
517 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
518 | struct drm_device *dev = obj->dev; | |
519 | struct page **pages; | |
cd5351f4 RC |
520 | int ret; |
521 | ||
522 | /* Make sure we don't parallel update on a fault, nor move or remove | |
523 | * something from beneath our feet | |
524 | */ | |
525 | mutex_lock(&dev->struct_mutex); | |
526 | ||
527 | /* if a shmem backed object, make sure we have pages attached now */ | |
528 | ret = get_pages(obj, &pages); | |
ae053039 | 529 | if (ret) |
cd5351f4 | 530 | goto fail; |
cd5351f4 RC |
531 | |
532 | /* where should we do corresponding put_pages().. we are mapping | |
533 | * the original page, rather than thru a GART, so we can't rely | |
534 | * on eviction to trigger this. But munmap() or all mappings should | |
535 | * probably trigger put_pages()? | |
536 | */ | |
537 | ||
f7f9f453 RC |
538 | if (omap_obj->flags & OMAP_BO_TILED) |
539 | ret = fault_2d(obj, vma, vmf); | |
540 | else | |
541 | ret = fault_1d(obj, vma, vmf); | |
cd5351f4 | 542 | |
cd5351f4 RC |
543 | |
544 | fail: | |
545 | mutex_unlock(&dev->struct_mutex); | |
546 | switch (ret) { | |
547 | case 0: | |
548 | case -ERESTARTSYS: | |
549 | case -EINTR: | |
e1d4ee0f RC |
550 | case -EBUSY: |
551 | /* | |
552 | * EBUSY is ok: this just means that another thread | |
553 | * already did the job. | |
554 | */ | |
cd5351f4 RC |
555 | return VM_FAULT_NOPAGE; |
556 | case -ENOMEM: | |
557 | return VM_FAULT_OOM; | |
558 | default: | |
559 | return VM_FAULT_SIGBUS; | |
560 | } | |
561 | } | |
562 | ||
563 | /** We override mainly to fix up some of the vm mapping flags.. */ | |
564 | int omap_gem_mmap(struct file *filp, struct vm_area_struct *vma) | |
565 | { | |
cd5351f4 RC |
566 | int ret; |
567 | ||
568 | ret = drm_gem_mmap(filp, vma); | |
569 | if (ret) { | |
570 | DBG("mmap failed: %d", ret); | |
571 | return ret; | |
572 | } | |
573 | ||
8b6b569e RC |
574 | return omap_gem_mmap_obj(vma->vm_private_data, vma); |
575 | } | |
576 | ||
577 | int omap_gem_mmap_obj(struct drm_gem_object *obj, | |
578 | struct vm_area_struct *vma) | |
579 | { | |
580 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
cd5351f4 RC |
581 | |
582 | vma->vm_flags &= ~VM_PFNMAP; | |
583 | vma->vm_flags |= VM_MIXEDMAP; | |
584 | ||
585 | if (omap_obj->flags & OMAP_BO_WC) { | |
586 | vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags)); | |
587 | } else if (omap_obj->flags & OMAP_BO_UNCACHED) { | |
588 | vma->vm_page_prot = pgprot_noncached(vm_get_page_prot(vma->vm_flags)); | |
589 | } else { | |
8b6b569e RC |
590 | /* |
591 | * We do have some private objects, at least for scanout buffers | |
592 | * on hardware without DMM/TILER. But these are allocated write- | |
593 | * combine | |
594 | */ | |
595 | if (WARN_ON(!obj->filp)) | |
596 | return -EINVAL; | |
597 | ||
598 | /* | |
599 | * Shunt off cached objs to shmem file so they have their own | |
600 | * address_space (so unmap_mapping_range does what we want, | |
601 | * in particular in the case of mmap'd dmabufs) | |
602 | */ | |
603 | fput(vma->vm_file); | |
8b6b569e | 604 | vma->vm_pgoff = 0; |
cb0942b8 | 605 | vma->vm_file = get_file(obj->filp); |
8b6b569e | 606 | |
cd5351f4 RC |
607 | vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); |
608 | } | |
609 | ||
8b6b569e | 610 | return 0; |
cd5351f4 RC |
611 | } |
612 | ||
7ef93b0a LP |
613 | /* ----------------------------------------------------------------------------- |
614 | * Dumb Buffers | |
615 | */ | |
8b6b569e | 616 | |
cd5351f4 RC |
617 | /** |
618 | * omap_gem_dumb_create - create a dumb buffer | |
619 | * @drm_file: our client file | |
620 | * @dev: our device | |
621 | * @args: the requested arguments copied from userspace | |
622 | * | |
623 | * Allocate a buffer suitable for use for a frame buffer of the | |
624 | * form described by user space. Give userspace a handle by which | |
625 | * to reference it. | |
626 | */ | |
627 | int omap_gem_dumb_create(struct drm_file *file, struct drm_device *dev, | |
628 | struct drm_mode_create_dumb *args) | |
629 | { | |
630 | union omap_gem_size gsize; | |
631 | ||
ce481eda | 632 | args->pitch = DIV_ROUND_UP(args->width * args->bpp, 8); |
6a5228fd | 633 | |
cd5351f4 RC |
634 | args->size = PAGE_ALIGN(args->pitch * args->height); |
635 | ||
636 | gsize = (union omap_gem_size){ | |
637 | .bytes = args->size, | |
638 | }; | |
639 | ||
640 | return omap_gem_new_handle(dev, file, gsize, | |
641 | OMAP_BO_SCANOUT | OMAP_BO_WC, &args->handle); | |
642 | } | |
643 | ||
cd5351f4 RC |
644 | /** |
645 | * omap_gem_dumb_map - buffer mapping for dumb interface | |
646 | * @file: our drm client file | |
647 | * @dev: drm device | |
648 | * @handle: GEM handle to the object (from dumb_create) | |
649 | * | |
650 | * Do the necessary setup to allow the mapping of the frame buffer | |
651 | * into user memory. We don't have to do much here at the moment. | |
652 | */ | |
653 | int omap_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev, | |
654 | uint32_t handle, uint64_t *offset) | |
655 | { | |
656 | struct drm_gem_object *obj; | |
657 | int ret = 0; | |
658 | ||
cd5351f4 | 659 | /* GEM does all our handle to object mapping */ |
a8ad0bd8 | 660 | obj = drm_gem_object_lookup(file, handle); |
cd5351f4 RC |
661 | if (obj == NULL) { |
662 | ret = -ENOENT; | |
663 | goto fail; | |
664 | } | |
665 | ||
666 | *offset = omap_gem_mmap_offset(obj); | |
667 | ||
668 | drm_gem_object_unreference_unlocked(obj); | |
669 | ||
670 | fail: | |
cd5351f4 RC |
671 | return ret; |
672 | } | |
673 | ||
e1c1174f | 674 | #ifdef CONFIG_DRM_FBDEV_EMULATION |
a6a91827 RC |
675 | /* Set scrolling position. This allows us to implement fast scrolling |
676 | * for console. | |
9b55b95a RC |
677 | * |
678 | * Call only from non-atomic contexts. | |
a6a91827 RC |
679 | */ |
680 | int omap_gem_roll(struct drm_gem_object *obj, uint32_t roll) | |
681 | { | |
682 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
683 | uint32_t npages = obj->size >> PAGE_SHIFT; | |
684 | int ret = 0; | |
685 | ||
686 | if (roll > npages) { | |
687 | dev_err(obj->dev->dev, "invalid roll: %d\n", roll); | |
688 | return -EINVAL; | |
689 | } | |
690 | ||
a6a91827 RC |
691 | omap_obj->roll = roll; |
692 | ||
af69592a RC |
693 | mutex_lock(&obj->dev->struct_mutex); |
694 | ||
a6a91827 RC |
695 | /* if we aren't mapped yet, we don't need to do anything */ |
696 | if (omap_obj->block) { | |
697 | struct page **pages; | |
698 | ret = get_pages(obj, &pages); | |
699 | if (ret) | |
700 | goto fail; | |
701 | ret = tiler_pin(omap_obj->block, pages, npages, roll, true); | |
702 | if (ret) | |
703 | dev_err(obj->dev->dev, "could not repin: %d\n", ret); | |
704 | } | |
705 | ||
706 | fail: | |
707 | mutex_unlock(&obj->dev->struct_mutex); | |
708 | ||
709 | return ret; | |
710 | } | |
e1c1174f | 711 | #endif |
a6a91827 | 712 | |
7ef93b0a LP |
713 | /* ----------------------------------------------------------------------------- |
714 | * Memory Management & DMA Sync | |
715 | */ | |
716 | ||
24fbaca0 LP |
717 | /* |
718 | * shmem buffers that are mapped cached are not coherent. | |
719 | * | |
720 | * We keep track of dirty pages using page faulting to perform cache management. | |
721 | * When a page is mapped to the CPU in read/write mode the device can't access | |
722 | * it and omap_obj->dma_addrs[i] is NULL. When a page is mapped to the device | |
723 | * the omap_obj->dma_addrs[i] is set to the DMA address, and the page is | |
724 | * unmapped from the CPU. | |
7ef93b0a LP |
725 | */ |
726 | static inline bool is_cached_coherent(struct drm_gem_object *obj) | |
727 | { | |
728 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
cdb0381d | 729 | |
24fbaca0 LP |
730 | return !((omap_obj->flags & OMAP_BO_MEM_SHMEM) && |
731 | ((omap_obj->flags & OMAP_BO_CACHE_MASK) == OMAP_BO_CACHED)); | |
7ef93b0a | 732 | } |
a6a91827 | 733 | |
8b6b569e RC |
734 | /* Sync the buffer for CPU access.. note pages should already be |
735 | * attached, ie. omap_gem_get_pages() | |
736 | */ | |
d61ce7da | 737 | void omap_gem_cpu_sync_page(struct drm_gem_object *obj, int pgoff) |
8b6b569e RC |
738 | { |
739 | struct drm_device *dev = obj->dev; | |
740 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
741 | ||
24fbaca0 LP |
742 | if (is_cached_coherent(obj)) |
743 | return; | |
744 | ||
745 | if (omap_obj->dma_addrs[pgoff]) { | |
57c22f7c | 746 | dma_unmap_page(dev->dev, omap_obj->dma_addrs[pgoff], |
97817fd4 | 747 | PAGE_SIZE, DMA_TO_DEVICE); |
57c22f7c | 748 | omap_obj->dma_addrs[pgoff] = 0; |
8b6b569e RC |
749 | } |
750 | } | |
751 | ||
752 | /* sync the buffer for DMA access */ | |
d61ce7da | 753 | void omap_gem_dma_sync_buffer(struct drm_gem_object *obj, |
8b6b569e RC |
754 | enum dma_data_direction dir) |
755 | { | |
756 | struct drm_device *dev = obj->dev; | |
757 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
4fa6ce48 LP |
758 | int i, npages = obj->size >> PAGE_SHIFT; |
759 | struct page **pages = omap_obj->pages; | |
760 | bool dirty = false; | |
8b6b569e | 761 | |
24fbaca0 | 762 | if (is_cached_coherent(obj)) |
4fa6ce48 | 763 | return; |
a3d6345d | 764 | |
4fa6ce48 | 765 | for (i = 0; i < npages; i++) { |
57c22f7c | 766 | if (!omap_obj->dma_addrs[i]) { |
4fa6ce48 | 767 | dma_addr_t addr; |
a3d6345d | 768 | |
4fa6ce48 | 769 | addr = dma_map_page(dev->dev, pages[i], 0, |
97817fd4 | 770 | PAGE_SIZE, dir); |
4fa6ce48 LP |
771 | if (dma_mapping_error(dev->dev, addr)) { |
772 | dev_warn(dev->dev, "%s: failed to map page\n", | |
773 | __func__); | |
774 | break; | |
8b6b569e | 775 | } |
8b6b569e | 776 | |
4fa6ce48 | 777 | dirty = true; |
57c22f7c | 778 | omap_obj->dma_addrs[i] = addr; |
8b6b569e RC |
779 | } |
780 | } | |
4fa6ce48 LP |
781 | |
782 | if (dirty) { | |
783 | unmap_mapping_range(obj->filp->f_mapping, 0, | |
784 | omap_gem_mmap_size(obj), 1); | |
785 | } | |
8b6b569e RC |
786 | } |
787 | ||
bc20c85c LP |
788 | /** |
789 | * omap_gem_pin() - Pin a GEM object in memory | |
790 | * @obj: the GEM object | |
791 | * @dma_addr: the DMA address | |
792 | * | |
793 | * Pin the given GEM object in memory and fill the dma_addr pointer with the | |
794 | * object's DMA address. If the buffer is not physically contiguous it will be | |
795 | * remapped through the TILER to provide a contiguous view. | |
796 | * | |
797 | * Pins are reference-counted, calling this function multiple times is allowed | |
798 | * as long the corresponding omap_gem_unpin() calls are balanced. | |
799 | * | |
800 | * Return 0 on success or a negative error code otherwise. | |
cd5351f4 | 801 | */ |
bc20c85c | 802 | int omap_gem_pin(struct drm_gem_object *obj, dma_addr_t *dma_addr) |
cd5351f4 | 803 | { |
a6a91827 | 804 | struct omap_drm_private *priv = obj->dev->dev_private; |
cd5351f4 RC |
805 | struct omap_gem_object *omap_obj = to_omap_bo(obj); |
806 | int ret = 0; | |
807 | ||
f7f9f453 RC |
808 | mutex_lock(&obj->dev->struct_mutex); |
809 | ||
aa0408bc | 810 | if (!is_contiguous(omap_obj) && priv->has_dmm) { |
16869083 | 811 | if (omap_obj->dma_addr_cnt == 0) { |
f7f9f453 | 812 | struct page **pages; |
a6a91827 | 813 | uint32_t npages = obj->size >> PAGE_SHIFT; |
f7f9f453 RC |
814 | enum tiler_fmt fmt = gem2fmt(omap_obj->flags); |
815 | struct tiler_block *block; | |
a6a91827 | 816 | |
f7f9f453 RC |
817 | BUG_ON(omap_obj->block); |
818 | ||
819 | ret = get_pages(obj, &pages); | |
820 | if (ret) | |
821 | goto fail; | |
822 | ||
f7f9f453 RC |
823 | if (omap_obj->flags & OMAP_BO_TILED) { |
824 | block = tiler_reserve_2d(fmt, | |
825 | omap_obj->width, | |
826 | omap_obj->height, 0); | |
827 | } else { | |
828 | block = tiler_reserve_1d(obj->size); | |
829 | } | |
830 | ||
831 | if (IS_ERR(block)) { | |
832 | ret = PTR_ERR(block); | |
833 | dev_err(obj->dev->dev, | |
834 | "could not remap: %d (%d)\n", ret, fmt); | |
835 | goto fail; | |
836 | } | |
837 | ||
838 | /* TODO: enable async refill.. */ | |
a6a91827 RC |
839 | ret = tiler_pin(block, pages, npages, |
840 | omap_obj->roll, true); | |
f7f9f453 RC |
841 | if (ret) { |
842 | tiler_release(block); | |
843 | dev_err(obj->dev->dev, | |
844 | "could not pin: %d\n", ret); | |
845 | goto fail; | |
846 | } | |
847 | ||
16869083 | 848 | omap_obj->dma_addr = tiler_ssptr(block); |
f7f9f453 RC |
849 | omap_obj->block = block; |
850 | ||
16869083 | 851 | DBG("got dma address: %pad", &omap_obj->dma_addr); |
f7f9f453 RC |
852 | } |
853 | ||
16869083 | 854 | omap_obj->dma_addr_cnt++; |
f7f9f453 | 855 | |
16869083 | 856 | *dma_addr = omap_obj->dma_addr; |
b22e6690 | 857 | } else if (is_contiguous(omap_obj)) { |
16869083 | 858 | *dma_addr = omap_obj->dma_addr; |
f7f9f453 RC |
859 | } else { |
860 | ret = -EINVAL; | |
8b6b569e | 861 | goto fail; |
cd5351f4 RC |
862 | } |
863 | ||
f7f9f453 RC |
864 | fail: |
865 | mutex_unlock(&obj->dev->struct_mutex); | |
cd5351f4 RC |
866 | |
867 | return ret; | |
868 | } | |
869 | ||
bc20c85c LP |
870 | /** |
871 | * omap_gem_unpin() - Unpin a GEM object from memory | |
872 | * @obj: the GEM object | |
873 | * | |
874 | * Unpin the given GEM object previously pinned with omap_gem_pin(). Pins are | |
875 | * reference-counted, the actualy unpin will only be performed when the number | |
876 | * of calls to this function matches the number of calls to omap_gem_pin(). | |
cd5351f4 | 877 | */ |
bc20c85c | 878 | void omap_gem_unpin(struct drm_gem_object *obj) |
cd5351f4 | 879 | { |
f7f9f453 | 880 | struct omap_gem_object *omap_obj = to_omap_bo(obj); |
393a949f | 881 | int ret; |
f7f9f453 RC |
882 | |
883 | mutex_lock(&obj->dev->struct_mutex); | |
16869083 LP |
884 | if (omap_obj->dma_addr_cnt > 0) { |
885 | omap_obj->dma_addr_cnt--; | |
886 | if (omap_obj->dma_addr_cnt == 0) { | |
f7f9f453 RC |
887 | ret = tiler_unpin(omap_obj->block); |
888 | if (ret) { | |
889 | dev_err(obj->dev->dev, | |
890 | "could not unpin pages: %d\n", ret); | |
f7f9f453 RC |
891 | } |
892 | ret = tiler_release(omap_obj->block); | |
893 | if (ret) { | |
894 | dev_err(obj->dev->dev, | |
895 | "could not release unmap: %d\n", ret); | |
896 | } | |
16869083 | 897 | omap_obj->dma_addr = 0; |
f7f9f453 RC |
898 | omap_obj->block = NULL; |
899 | } | |
900 | } | |
393a949f | 901 | |
f7f9f453 | 902 | mutex_unlock(&obj->dev->struct_mutex); |
cd5351f4 RC |
903 | } |
904 | ||
3c810c61 RC |
905 | /* Get rotated scanout address (only valid if already pinned), at the |
906 | * specified orientation and x,y offset from top-left corner of buffer | |
907 | * (only valid for tiled 2d buffers) | |
908 | */ | |
16869083 LP |
909 | int omap_gem_rotated_dma_addr(struct drm_gem_object *obj, uint32_t orient, |
910 | int x, int y, dma_addr_t *dma_addr) | |
3c810c61 RC |
911 | { |
912 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
913 | int ret = -EINVAL; | |
914 | ||
915 | mutex_lock(&obj->dev->struct_mutex); | |
16869083 | 916 | if ((omap_obj->dma_addr_cnt > 0) && omap_obj->block && |
3c810c61 | 917 | (omap_obj->flags & OMAP_BO_TILED)) { |
16869083 | 918 | *dma_addr = tiler_tsptr(omap_obj->block, orient, x, y); |
3c810c61 RC |
919 | ret = 0; |
920 | } | |
921 | mutex_unlock(&obj->dev->struct_mutex); | |
922 | return ret; | |
923 | } | |
924 | ||
925 | /* Get tiler stride for the buffer (only valid for 2d tiled buffers) */ | |
926 | int omap_gem_tiled_stride(struct drm_gem_object *obj, uint32_t orient) | |
927 | { | |
928 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
929 | int ret = -EINVAL; | |
930 | if (omap_obj->flags & OMAP_BO_TILED) | |
931 | ret = tiler_stride(gem2fmt(omap_obj->flags), orient); | |
932 | return ret; | |
933 | } | |
934 | ||
6ad11bc3 RC |
935 | /* if !remap, and we don't have pages backing, then fail, rather than |
936 | * increasing the pin count (which we don't really do yet anyways, | |
937 | * because we don't support swapping pages back out). And 'remap' | |
938 | * might not be quite the right name, but I wanted to keep it working | |
bc20c85c | 939 | * similarly to omap_gem_pin(). Note though that mutex is not |
6ad11bc3 | 940 | * aquired if !remap (because this can be called in atomic ctxt), |
bc20c85c | 941 | * but probably omap_gem_unpin() should be changed to work in the |
6ad11bc3 RC |
942 | * same way. If !remap, a matching omap_gem_put_pages() call is not |
943 | * required (and should not be made). | |
944 | */ | |
945 | int omap_gem_get_pages(struct drm_gem_object *obj, struct page ***pages, | |
946 | bool remap) | |
cd5351f4 RC |
947 | { |
948 | int ret; | |
6ad11bc3 RC |
949 | if (!remap) { |
950 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
951 | if (!omap_obj->pages) | |
952 | return -ENOMEM; | |
953 | *pages = omap_obj->pages; | |
954 | return 0; | |
955 | } | |
cd5351f4 RC |
956 | mutex_lock(&obj->dev->struct_mutex); |
957 | ret = get_pages(obj, pages); | |
958 | mutex_unlock(&obj->dev->struct_mutex); | |
959 | return ret; | |
960 | } | |
961 | ||
962 | /* release pages when DMA no longer being performed */ | |
963 | int omap_gem_put_pages(struct drm_gem_object *obj) | |
964 | { | |
965 | /* do something here if we dynamically attach/detach pages.. at | |
966 | * least they would no longer need to be pinned if everyone has | |
967 | * released the pages.. | |
968 | */ | |
969 | return 0; | |
970 | } | |
971 | ||
e1c1174f | 972 | #ifdef CONFIG_DRM_FBDEV_EMULATION |
f7f9f453 RC |
973 | /* Get kernel virtual address for CPU access.. this more or less only |
974 | * exists for omap_fbdev. This should be called with struct_mutex | |
975 | * held. | |
cd5351f4 RC |
976 | */ |
977 | void *omap_gem_vaddr(struct drm_gem_object *obj) | |
978 | { | |
979 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
696e3ca3 | 980 | WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex)); |
f7f9f453 RC |
981 | if (!omap_obj->vaddr) { |
982 | struct page **pages; | |
983 | int ret = get_pages(obj, &pages); | |
984 | if (ret) | |
985 | return ERR_PTR(ret); | |
986 | omap_obj->vaddr = vmap(pages, obj->size >> PAGE_SHIFT, | |
987 | VM_MAP, pgprot_writecombine(PAGE_KERNEL)); | |
988 | } | |
cd5351f4 RC |
989 | return omap_obj->vaddr; |
990 | } | |
e1c1174f | 991 | #endif |
cd5351f4 | 992 | |
7ef93b0a LP |
993 | /* ----------------------------------------------------------------------------- |
994 | * Power Management | |
995 | */ | |
cd5351f4 | 996 | |
e78edba1 AG |
997 | #ifdef CONFIG_PM |
998 | /* re-pin objects in DMM in resume path: */ | |
999 | int omap_gem_resume(struct device *dev) | |
1000 | { | |
1001 | struct drm_device *drm_dev = dev_get_drvdata(dev); | |
1002 | struct omap_drm_private *priv = drm_dev->dev_private; | |
1003 | struct omap_gem_object *omap_obj; | |
1004 | int ret = 0; | |
1005 | ||
638fe887 | 1006 | mutex_lock(&priv->list_lock); |
e78edba1 AG |
1007 | list_for_each_entry(omap_obj, &priv->obj_list, mm_list) { |
1008 | if (omap_obj->block) { | |
1009 | struct drm_gem_object *obj = &omap_obj->base; | |
1010 | uint32_t npages = obj->size >> PAGE_SHIFT; | |
1011 | WARN_ON(!omap_obj->pages); /* this can't happen */ | |
1012 | ret = tiler_pin(omap_obj->block, | |
1013 | omap_obj->pages, npages, | |
1014 | omap_obj->roll, true); | |
1015 | if (ret) { | |
1016 | dev_err(dev, "could not repin: %d\n", ret); | |
638fe887 | 1017 | goto done; |
e78edba1 AG |
1018 | } |
1019 | } | |
1020 | } | |
1021 | ||
638fe887 DV |
1022 | done: |
1023 | mutex_unlock(&priv->list_lock); | |
1024 | return ret; | |
e78edba1 AG |
1025 | } |
1026 | #endif | |
1027 | ||
7ef93b0a LP |
1028 | /* ----------------------------------------------------------------------------- |
1029 | * DebugFS | |
1030 | */ | |
1031 | ||
f6b6036e RC |
1032 | #ifdef CONFIG_DEBUG_FS |
1033 | void omap_gem_describe(struct drm_gem_object *obj, struct seq_file *m) | |
1034 | { | |
f6b6036e | 1035 | struct omap_gem_object *omap_obj = to_omap_bo(obj); |
0de23977 | 1036 | uint64_t off; |
f6b6036e | 1037 | |
0de23977 | 1038 | off = drm_vma_node_start(&obj->vma_node); |
f6b6036e | 1039 | |
2d31ca3a | 1040 | seq_printf(m, "%08x: %2d (%2d) %08llx %pad (%2d) %p %4d", |
2c935bc5 | 1041 | omap_obj->flags, obj->name, kref_read(&obj->refcount), |
16869083 | 1042 | off, &omap_obj->dma_addr, omap_obj->dma_addr_cnt, |
f6b6036e RC |
1043 | omap_obj->vaddr, omap_obj->roll); |
1044 | ||
1045 | if (omap_obj->flags & OMAP_BO_TILED) { | |
1046 | seq_printf(m, " %dx%d", omap_obj->width, omap_obj->height); | |
1047 | if (omap_obj->block) { | |
1048 | struct tcm_area *area = &omap_obj->block->area; | |
1049 | seq_printf(m, " (%dx%d, %dx%d)", | |
1050 | area->p0.x, area->p0.y, | |
1051 | area->p1.x, area->p1.y); | |
1052 | } | |
1053 | } else { | |
2150c19b | 1054 | seq_printf(m, " %zu", obj->size); |
f6b6036e RC |
1055 | } |
1056 | ||
1057 | seq_printf(m, "\n"); | |
1058 | } | |
1059 | ||
1060 | void omap_gem_describe_objects(struct list_head *list, struct seq_file *m) | |
1061 | { | |
1062 | struct omap_gem_object *omap_obj; | |
1063 | int count = 0; | |
1064 | size_t size = 0; | |
1065 | ||
1066 | list_for_each_entry(omap_obj, list, mm_list) { | |
1067 | struct drm_gem_object *obj = &omap_obj->base; | |
1068 | seq_printf(m, " "); | |
1069 | omap_gem_describe(obj, m); | |
1070 | count++; | |
1071 | size += obj->size; | |
1072 | } | |
1073 | ||
1074 | seq_printf(m, "Total %d objects, %zu bytes\n", count, size); | |
1075 | } | |
1076 | #endif | |
1077 | ||
7ef93b0a LP |
1078 | /* ----------------------------------------------------------------------------- |
1079 | * Constructor & Destructor | |
1080 | */ | |
1081 | ||
cd5351f4 RC |
1082 | void omap_gem_free_object(struct drm_gem_object *obj) |
1083 | { | |
1084 | struct drm_device *dev = obj->dev; | |
76c4055f | 1085 | struct omap_drm_private *priv = dev->dev_private; |
cd5351f4 RC |
1086 | struct omap_gem_object *omap_obj = to_omap_bo(obj); |
1087 | ||
f7f9f453 RC |
1088 | evict(obj); |
1089 | ||
f6b6036e RC |
1090 | WARN_ON(!mutex_is_locked(&dev->struct_mutex)); |
1091 | ||
638fe887 | 1092 | mutex_lock(&priv->list_lock); |
f6b6036e | 1093 | list_del(&omap_obj->mm_list); |
638fe887 | 1094 | mutex_unlock(&priv->list_lock); |
f6b6036e | 1095 | |
9a0774e0 RC |
1096 | /* this means the object is still pinned.. which really should |
1097 | * not happen. I think.. | |
1098 | */ | |
16869083 | 1099 | WARN_ON(omap_obj->dma_addr_cnt > 0); |
9a0774e0 | 1100 | |
3f50effd TV |
1101 | if (omap_obj->pages) { |
1102 | if (omap_obj->flags & OMAP_BO_MEM_DMABUF) | |
1103 | kfree(omap_obj->pages); | |
1104 | else | |
cd5351f4 | 1105 | omap_gem_detach_pages(obj); |
3f50effd | 1106 | } |
ae053039 | 1107 | |
3f50effd | 1108 | if (omap_obj->flags & OMAP_BO_MEM_DMA_API) { |
266c73b7 | 1109 | dma_free_wc(dev->dev, obj->size, omap_obj->vaddr, |
16869083 | 1110 | omap_obj->dma_addr); |
3f50effd TV |
1111 | } else if (omap_obj->vaddr) { |
1112 | vunmap(omap_obj->vaddr); | |
1113 | } else if (obj->import_attach) { | |
1114 | drm_prime_gem_destroy(obj, omap_obj->sgt); | |
cd5351f4 RC |
1115 | } |
1116 | ||
cd5351f4 RC |
1117 | drm_gem_object_release(obj); |
1118 | ||
00e9c7c7 | 1119 | kfree(omap_obj); |
cd5351f4 RC |
1120 | } |
1121 | ||
1122 | /* GEM buffer object constructor */ | |
1123 | struct drm_gem_object *omap_gem_new(struct drm_device *dev, | |
1124 | union omap_gem_size gsize, uint32_t flags) | |
1125 | { | |
a6a91827 | 1126 | struct omap_drm_private *priv = dev->dev_private; |
cd5351f4 | 1127 | struct omap_gem_object *omap_obj; |
92b4b445 | 1128 | struct drm_gem_object *obj; |
ab5a60c3 | 1129 | struct address_space *mapping; |
cd5351f4 RC |
1130 | size_t size; |
1131 | int ret; | |
1132 | ||
9cba3b99 | 1133 | /* Validate the flags and compute the memory and cache flags. */ |
cd5351f4 | 1134 | if (flags & OMAP_BO_TILED) { |
f4302747 | 1135 | if (!priv->usergart) { |
f7f9f453 | 1136 | dev_err(dev->dev, "Tiled buffers require DMM\n"); |
92b4b445 | 1137 | return NULL; |
f7f9f453 RC |
1138 | } |
1139 | ||
9cba3b99 LP |
1140 | /* |
1141 | * Tiled buffers are always shmem paged backed. When they are | |
1142 | * scanned out, they are remapped into DMM/TILER. | |
f7f9f453 RC |
1143 | */ |
1144 | flags &= ~OMAP_BO_SCANOUT; | |
9cba3b99 | 1145 | flags |= OMAP_BO_MEM_SHMEM; |
f7f9f453 | 1146 | |
9cba3b99 LP |
1147 | /* |
1148 | * Currently don't allow cached buffers. There is some caching | |
1149 | * stuff that needs to be handled better. | |
f7f9f453 | 1150 | */ |
7cb0d6c1 TV |
1151 | flags &= ~(OMAP_BO_CACHED|OMAP_BO_WC|OMAP_BO_UNCACHED); |
1152 | flags |= tiler_get_cpu_cache_flags(); | |
9cba3b99 LP |
1153 | } else if ((flags & OMAP_BO_SCANOUT) && !priv->has_dmm) { |
1154 | /* | |
b22e6690 LP |
1155 | * OMAP_BO_SCANOUT hints that the buffer doesn't need to be |
1156 | * tiled. However, to lower the pressure on memory allocation, | |
1157 | * use contiguous memory only if no TILER is available. | |
9cba3b99 LP |
1158 | */ |
1159 | flags |= OMAP_BO_MEM_DMA_API; | |
3f50effd | 1160 | } else if (!(flags & OMAP_BO_MEM_DMABUF)) { |
9cba3b99 | 1161 | /* |
3f50effd | 1162 | * All other buffers not backed by dma_buf are shmem-backed. |
9cba3b99 LP |
1163 | */ |
1164 | flags |= OMAP_BO_MEM_SHMEM; | |
f7f9f453 | 1165 | } |
cd5351f4 | 1166 | |
9cba3b99 | 1167 | /* Allocate the initialize the OMAP GEM object. */ |
cd5351f4 | 1168 | omap_obj = kzalloc(sizeof(*omap_obj), GFP_KERNEL); |
78110bb8 | 1169 | if (!omap_obj) |
a903e3b6 | 1170 | return NULL; |
f6b6036e | 1171 | |
cd5351f4 | 1172 | obj = &omap_obj->base; |
9cba3b99 | 1173 | omap_obj->flags = flags; |
cd5351f4 | 1174 | |
9cba3b99 LP |
1175 | if (flags & OMAP_BO_TILED) { |
1176 | /* | |
1177 | * For tiled buffers align dimensions to slot boundaries and | |
1178 | * calculate size based on aligned dimensions. | |
a6a91827 | 1179 | */ |
9cba3b99 LP |
1180 | tiler_align(gem2fmt(flags), &gsize.tiled.width, |
1181 | &gsize.tiled.height); | |
ae053039 | 1182 | |
9cba3b99 LP |
1183 | size = tiler_size(gem2fmt(flags), gsize.tiled.width, |
1184 | gsize.tiled.height); | |
cd5351f4 | 1185 | |
f7f9f453 RC |
1186 | omap_obj->width = gsize.tiled.width; |
1187 | omap_obj->height = gsize.tiled.height; | |
9cba3b99 LP |
1188 | } else { |
1189 | size = PAGE_ALIGN(gsize.bytes); | |
f7f9f453 RC |
1190 | } |
1191 | ||
9cba3b99 LP |
1192 | /* Initialize the GEM object. */ |
1193 | if (!(flags & OMAP_BO_MEM_SHMEM)) { | |
89c8233f | 1194 | drm_gem_private_object_init(dev, obj, size); |
ab5a60c3 | 1195 | } else { |
cd5351f4 | 1196 | ret = drm_gem_object_init(dev, obj, size); |
ab5a60c3 | 1197 | if (ret) |
c2eb77ff | 1198 | goto err_free; |
cd5351f4 | 1199 | |
93c76a3d | 1200 | mapping = obj->filp->f_mapping; |
ab5a60c3 DH |
1201 | mapping_set_gfp_mask(mapping, GFP_USER | __GFP_DMA32); |
1202 | } | |
cd5351f4 | 1203 | |
c2eb77ff LP |
1204 | /* Allocate memory if needed. */ |
1205 | if (flags & OMAP_BO_MEM_DMA_API) { | |
266c73b7 | 1206 | omap_obj->vaddr = dma_alloc_wc(dev->dev, size, |
16869083 | 1207 | &omap_obj->dma_addr, |
266c73b7 | 1208 | GFP_KERNEL); |
c2eb77ff LP |
1209 | if (!omap_obj->vaddr) |
1210 | goto err_release; | |
1211 | } | |
1212 | ||
638fe887 | 1213 | mutex_lock(&priv->list_lock); |
c2eb77ff | 1214 | list_add(&omap_obj->mm_list, &priv->obj_list); |
638fe887 | 1215 | mutex_unlock(&priv->list_lock); |
c2eb77ff | 1216 | |
cd5351f4 RC |
1217 | return obj; |
1218 | ||
c2eb77ff LP |
1219 | err_release: |
1220 | drm_gem_object_release(obj); | |
1221 | err_free: | |
1222 | kfree(omap_obj); | |
cd5351f4 RC |
1223 | return NULL; |
1224 | } | |
f7f9f453 | 1225 | |
b22e6690 LP |
1226 | struct drm_gem_object *omap_gem_new_dmabuf(struct drm_device *dev, size_t size, |
1227 | struct sg_table *sgt) | |
1228 | { | |
1229 | struct omap_drm_private *priv = dev->dev_private; | |
1230 | struct omap_gem_object *omap_obj; | |
1231 | struct drm_gem_object *obj; | |
1232 | union omap_gem_size gsize; | |
1233 | ||
1234 | /* Without a DMM only physically contiguous buffers can be supported. */ | |
1235 | if (sgt->orig_nents != 1 && !priv->has_dmm) | |
1236 | return ERR_PTR(-EINVAL); | |
1237 | ||
1238 | mutex_lock(&dev->struct_mutex); | |
1239 | ||
1240 | gsize.bytes = PAGE_ALIGN(size); | |
1241 | obj = omap_gem_new(dev, gsize, OMAP_BO_MEM_DMABUF | OMAP_BO_WC); | |
1242 | if (!obj) { | |
1243 | obj = ERR_PTR(-ENOMEM); | |
1244 | goto done; | |
1245 | } | |
1246 | ||
1247 | omap_obj = to_omap_bo(obj); | |
1248 | omap_obj->sgt = sgt; | |
1249 | ||
1250 | if (sgt->orig_nents == 1) { | |
16869083 | 1251 | omap_obj->dma_addr = sg_dma_address(sgt->sgl); |
b22e6690 LP |
1252 | } else { |
1253 | /* Create pages list from sgt */ | |
1254 | struct sg_page_iter iter; | |
1255 | struct page **pages; | |
1256 | unsigned int npages; | |
1257 | unsigned int i = 0; | |
1258 | ||
1259 | npages = DIV_ROUND_UP(size, PAGE_SIZE); | |
1260 | pages = kcalloc(npages, sizeof(*pages), GFP_KERNEL); | |
1261 | if (!pages) { | |
1262 | omap_gem_free_object(obj); | |
1263 | obj = ERR_PTR(-ENOMEM); | |
1264 | goto done; | |
1265 | } | |
1266 | ||
1267 | omap_obj->pages = pages; | |
1268 | ||
1269 | for_each_sg_page(sgt->sgl, &iter, sgt->orig_nents, 0) { | |
1270 | pages[i++] = sg_page_iter_page(&iter); | |
1271 | if (i > npages) | |
1272 | break; | |
1273 | } | |
1274 | ||
1275 | if (WARN_ON(i != npages)) { | |
1276 | omap_gem_free_object(obj); | |
1277 | obj = ERR_PTR(-ENOMEM); | |
1278 | goto done; | |
1279 | } | |
1280 | } | |
1281 | ||
1282 | done: | |
1283 | mutex_unlock(&dev->struct_mutex); | |
1284 | return obj; | |
1285 | } | |
1286 | ||
7ef93b0a LP |
1287 | /* convenience method to construct a GEM buffer object, and userspace handle */ |
1288 | int omap_gem_new_handle(struct drm_device *dev, struct drm_file *file, | |
1289 | union omap_gem_size gsize, uint32_t flags, uint32_t *handle) | |
1290 | { | |
1291 | struct drm_gem_object *obj; | |
1292 | int ret; | |
1293 | ||
1294 | obj = omap_gem_new(dev, gsize, flags); | |
1295 | if (!obj) | |
1296 | return -ENOMEM; | |
1297 | ||
1298 | ret = drm_gem_handle_create(file, obj, handle); | |
1299 | if (ret) { | |
cd5351f4 | 1300 | omap_gem_free_object(obj); |
7ef93b0a LP |
1301 | return ret; |
1302 | } | |
ae053039 | 1303 | |
7ef93b0a LP |
1304 | /* drop reference from allocate - handle holds it now */ |
1305 | drm_gem_object_unreference_unlocked(obj); | |
1306 | ||
1307 | return 0; | |
cd5351f4 | 1308 | } |
f7f9f453 | 1309 | |
7ef93b0a LP |
1310 | /* ----------------------------------------------------------------------------- |
1311 | * Init & Cleanup | |
1312 | */ | |
1313 | ||
1314 | /* If DMM is used, we need to set some stuff up.. */ | |
f7f9f453 RC |
1315 | void omap_gem_init(struct drm_device *dev) |
1316 | { | |
a6a91827 | 1317 | struct omap_drm_private *priv = dev->dev_private; |
f4302747 | 1318 | struct omap_drm_usergart *usergart; |
f7f9f453 RC |
1319 | const enum tiler_fmt fmts[] = { |
1320 | TILFMT_8BIT, TILFMT_16BIT, TILFMT_32BIT | |
1321 | }; | |
5c137797 | 1322 | int i, j; |
f7f9f453 | 1323 | |
e5e4e9b7 | 1324 | if (!dmm_is_available()) { |
f7f9f453 | 1325 | /* DMM only supported on OMAP4 and later, so this isn't fatal */ |
5c137797 | 1326 | dev_warn(dev->dev, "DMM not available, disable DMM support\n"); |
f7f9f453 RC |
1327 | return; |
1328 | } | |
1329 | ||
78110bb8 JP |
1330 | usergart = kcalloc(3, sizeof(*usergart), GFP_KERNEL); |
1331 | if (!usergart) | |
b369839b | 1332 | return; |
f7f9f453 RC |
1333 | |
1334 | /* reserve 4k aligned/wide regions for userspace mappings: */ | |
1335 | for (i = 0; i < ARRAY_SIZE(fmts); i++) { | |
1336 | uint16_t h = 1, w = PAGE_SIZE >> i; | |
1337 | tiler_align(fmts[i], &w, &h); | |
1338 | /* note: since each region is 1 4kb page wide, and minimum | |
1339 | * number of rows, the height ends up being the same as the | |
1340 | * # of pages in the region | |
1341 | */ | |
1342 | usergart[i].height = h; | |
1343 | usergart[i].height_shift = ilog2(h); | |
3c810c61 | 1344 | usergart[i].stride_pfn = tiler_stride(fmts[i], 0) >> PAGE_SHIFT; |
f7f9f453 RC |
1345 | usergart[i].slot_shift = ilog2((PAGE_SIZE / h) >> i); |
1346 | for (j = 0; j < NUM_USERGART_ENTRIES; j++) { | |
f4302747 LP |
1347 | struct omap_drm_usergart_entry *entry; |
1348 | struct tiler_block *block; | |
1349 | ||
1350 | entry = &usergart[i].entry[j]; | |
1351 | block = tiler_reserve_2d(fmts[i], w, h, PAGE_SIZE); | |
f7f9f453 RC |
1352 | if (IS_ERR(block)) { |
1353 | dev_err(dev->dev, | |
1354 | "reserve failed: %d, %d, %ld\n", | |
1355 | i, j, PTR_ERR(block)); | |
1356 | return; | |
1357 | } | |
16869083 | 1358 | entry->dma_addr = tiler_ssptr(block); |
f7f9f453 RC |
1359 | entry->block = block; |
1360 | ||
16869083 LP |
1361 | DBG("%d:%d: %dx%d: dma_addr=%pad stride=%d", i, j, w, h, |
1362 | &entry->dma_addr, | |
f7f9f453 RC |
1363 | usergart[i].stride_pfn << PAGE_SHIFT); |
1364 | } | |
1365 | } | |
a6a91827 | 1366 | |
f4302747 | 1367 | priv->usergart = usergart; |
a6a91827 | 1368 | priv->has_dmm = true; |
f7f9f453 RC |
1369 | } |
1370 | ||
1371 | void omap_gem_deinit(struct drm_device *dev) | |
1372 | { | |
f4302747 LP |
1373 | struct omap_drm_private *priv = dev->dev_private; |
1374 | ||
f7f9f453 RC |
1375 | /* I believe we can rely on there being no more outstanding GEM |
1376 | * objects which could depend on usergart/dmm at this point. | |
1377 | */ | |
f4302747 | 1378 | kfree(priv->usergart); |
f7f9f453 | 1379 | } |