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caab277b | 1 | // SPDX-License-Identifier: GPL-2.0-only |
cd5351f4 | 2 | /* |
1b409fda | 3 | * Copyright (C) 2011 Texas Instruments Incorporated - https://www.ti.com/ |
cd5351f4 | 4 | * Author: Rob Clark <rob.clark@linaro.org> |
cd5351f4 RC |
5 | */ |
6 | ||
81f6156c | 7 | #include <linux/dma-mapping.h> |
2d802453 | 8 | #include <linux/seq_file.h> |
cd5351f4 | 9 | #include <linux/shmem_fs.h> |
2d278f54 | 10 | #include <linux/spinlock.h> |
01c8f1c4 | 11 | #include <linux/pfn_t.h> |
2d278f54 | 12 | |
81f6156c | 13 | #include <drm/drm_prime.h> |
0de23977 | 14 | #include <drm/drm_vma_manager.h> |
cd5351f4 RC |
15 | |
16 | #include "omap_drv.h" | |
f7f9f453 | 17 | #include "omap_dmm_tiler.h" |
cd5351f4 | 18 | |
cd5351f4 RC |
19 | /* |
20 | * GEM buffer object implementation. | |
21 | */ | |
22 | ||
cd5351f4 | 23 | /* note: we use upper 8 bits of flags for driver-internal flags: */ |
cdb0381d LP |
24 | #define OMAP_BO_MEM_DMA_API 0x01000000 /* memory allocated with the dma_alloc_* API */ |
25 | #define OMAP_BO_MEM_SHMEM 0x02000000 /* memory allocated through shmem backing */ | |
b22e6690 | 26 | #define OMAP_BO_MEM_DMABUF 0x08000000 /* memory imported from a dmabuf */ |
cd5351f4 | 27 | |
cd5351f4 RC |
28 | struct omap_gem_object { |
29 | struct drm_gem_object base; | |
30 | ||
f6b6036e RC |
31 | struct list_head mm_list; |
32 | ||
dfe9cfcc | 33 | u32 flags; |
cd5351f4 | 34 | |
f7f9f453 | 35 | /** width/height for tiled formats (rounded up to slot boundaries) */ |
dfe9cfcc | 36 | u16 width, height; |
f7f9f453 | 37 | |
a6a91827 | 38 | /** roll applied when mapping to DMM */ |
dfe9cfcc | 39 | u32 roll; |
a6a91827 | 40 | |
1948d28d | 41 | /** protects pin_cnt, block, pages, dma_addrs and vaddr */ |
3cbd0c58 LP |
42 | struct mutex lock; |
43 | ||
cd5351f4 | 44 | /** |
16869083 | 45 | * dma_addr contains the buffer DMA address. It is valid for |
cd5351f4 | 46 | * |
b22e6690 LP |
47 | * - buffers allocated through the DMA mapping API (with the |
48 | * OMAP_BO_MEM_DMA_API flag set) | |
49 | * | |
50 | * - buffers imported from dmabuf (with the OMAP_BO_MEM_DMABUF flag set) | |
51 | * if they are physically contiguous (when sgt->orig_nents == 1) | |
52 | * | |
1948d28d ID |
53 | * - buffers mapped through the TILER when pin_cnt is not zero, in which |
54 | * case the DMA address points to the TILER aperture | |
b22e6690 LP |
55 | * |
56 | * Physically contiguous buffers have their DMA address equal to the | |
57 | * physical address as we don't remap those buffers through the TILER. | |
58 | * | |
59 | * Buffers mapped to the TILER have their DMA address pointing to the | |
1948d28d ID |
60 | * TILER aperture. As TILER mappings are refcounted (through pin_cnt) |
61 | * the DMA address must be accessed through omap_gem_pin() to ensure | |
62 | * that the mapping won't disappear unexpectedly. References must be | |
63 | * released with omap_gem_unpin(). | |
cd5351f4 | 64 | */ |
16869083 | 65 | dma_addr_t dma_addr; |
cd5351f4 | 66 | |
f7f9f453 | 67 | /** |
1948d28d | 68 | * # of users |
f7f9f453 | 69 | */ |
1948d28d | 70 | refcount_t pin_cnt; |
f7f9f453 | 71 | |
b22e6690 LP |
72 | /** |
73 | * If the buffer has been imported from a dmabuf the OMAP_DB_DMABUF flag | |
74 | * is set and the sgt field is valid. | |
75 | */ | |
76 | struct sg_table *sgt; | |
77 | ||
f7f9f453 RC |
78 | /** |
79 | * tiler block used when buffer is remapped in DMM/TILER. | |
80 | */ | |
81 | struct tiler_block *block; | |
82 | ||
cd5351f4 RC |
83 | /** |
84 | * Array of backing pages, if allocated. Note that pages are never | |
85 | * allocated for buffers originally allocated from contiguous memory | |
86 | */ | |
87 | struct page **pages; | |
88 | ||
f3bc9d24 | 89 | /** addresses corresponding to pages in above array */ |
57c22f7c | 90 | dma_addr_t *dma_addrs; |
f3bc9d24 | 91 | |
cd5351f4 RC |
92 | /** |
93 | * Virtual address, if mapped. | |
94 | */ | |
95 | void *vaddr; | |
cd5351f4 RC |
96 | }; |
97 | ||
7ef93b0a | 98 | #define to_omap_bo(x) container_of(x, struct omap_gem_object, base) |
c5b1247b | 99 | |
f7f9f453 RC |
100 | /* To deal with userspace mmap'ings of 2d tiled buffers, which (a) are |
101 | * not necessarily pinned in TILER all the time, and (b) when they are | |
102 | * they are not necessarily page aligned, we reserve one or more small | |
103 | * regions in each of the 2d containers to use as a user-GART where we | |
104 | * can create a second page-aligned mapping of parts of the buffer | |
105 | * being accessed from userspace. | |
106 | * | |
107 | * Note that we could optimize slightly when we know that multiple | |
108 | * tiler containers are backed by the same PAT.. but I'll leave that | |
109 | * for later.. | |
110 | */ | |
111 | #define NUM_USERGART_ENTRIES 2 | |
f4302747 | 112 | struct omap_drm_usergart_entry { |
f7f9f453 | 113 | struct tiler_block *block; /* the reserved tiler block */ |
16869083 | 114 | dma_addr_t dma_addr; |
f7f9f453 RC |
115 | struct drm_gem_object *obj; /* the current pinned obj */ |
116 | pgoff_t obj_pgoff; /* page offset of obj currently | |
117 | mapped in */ | |
118 | }; | |
f4302747 LP |
119 | |
120 | struct omap_drm_usergart { | |
121 | struct omap_drm_usergart_entry entry[NUM_USERGART_ENTRIES]; | |
f7f9f453 RC |
122 | int height; /* height in rows */ |
123 | int height_shift; /* ilog2(height in rows) */ | |
124 | int slot_shift; /* ilog2(width per slot) */ | |
125 | int stride_pfn; /* stride in pages */ | |
126 | int last; /* index of last used entry */ | |
f4302747 | 127 | }; |
f7f9f453 | 128 | |
b902f8f4 LP |
129 | /* ----------------------------------------------------------------------------- |
130 | * Helpers | |
131 | */ | |
132 | ||
133 | /** get mmap offset */ | |
dc8c9aee | 134 | u64 omap_gem_mmap_offset(struct drm_gem_object *obj) |
b902f8f4 LP |
135 | { |
136 | struct drm_device *dev = obj->dev; | |
137 | int ret; | |
138 | size_t size; | |
139 | ||
b902f8f4 LP |
140 | /* Make it mmapable */ |
141 | size = omap_gem_mmap_size(obj); | |
142 | ret = drm_gem_create_mmap_offset_size(obj, size); | |
143 | if (ret) { | |
144 | dev_err(dev->dev, "could not allocate mmap offset\n"); | |
145 | return 0; | |
146 | } | |
147 | ||
148 | return drm_vma_node_offset_addr(&obj->vma_node); | |
149 | } | |
150 | ||
620063e1 | 151 | static bool omap_gem_is_contiguous(struct omap_gem_object *omap_obj) |
7ef93b0a | 152 | { |
b22e6690 LP |
153 | if (omap_obj->flags & OMAP_BO_MEM_DMA_API) |
154 | return true; | |
155 | ||
156 | if ((omap_obj->flags & OMAP_BO_MEM_DMABUF) && omap_obj->sgt->nents == 1) | |
157 | return true; | |
158 | ||
159 | return false; | |
7ef93b0a LP |
160 | } |
161 | ||
162 | /* ----------------------------------------------------------------------------- | |
163 | * Eviction | |
164 | */ | |
f7f9f453 | 165 | |
620063e1 | 166 | static void omap_gem_evict_entry(struct drm_gem_object *obj, |
f4302747 | 167 | enum tiler_fmt fmt, struct omap_drm_usergart_entry *entry) |
f7f9f453 | 168 | { |
6796cb16 | 169 | struct omap_gem_object *omap_obj = to_omap_bo(obj); |
f4302747 LP |
170 | struct omap_drm_private *priv = obj->dev->dev_private; |
171 | int n = priv->usergart[fmt].height; | |
6796cb16 | 172 | size_t size = PAGE_SIZE * n; |
dc8c9aee | 173 | loff_t off = omap_gem_mmap_offset(obj) + |
6796cb16 | 174 | (entry->obj_pgoff << PAGE_SHIFT); |
cc8dd766 | 175 | const int m = DIV_ROUND_UP(omap_obj->width << fmt, PAGE_SIZE); |
6796cb16 DH |
176 | |
177 | if (m > 1) { | |
178 | int i; | |
179 | /* if stride > than PAGE_SIZE then sparse mapping: */ | |
180 | for (i = n; i > 0; i--) { | |
181 | unmap_mapping_range(obj->dev->anon_inode->i_mapping, | |
182 | off, PAGE_SIZE, 1); | |
183 | off += PAGE_SIZE * m; | |
e559895a | 184 | } |
6796cb16 DH |
185 | } else { |
186 | unmap_mapping_range(obj->dev->anon_inode->i_mapping, | |
187 | off, size, 1); | |
f7f9f453 RC |
188 | } |
189 | ||
190 | entry->obj = NULL; | |
191 | } | |
192 | ||
193 | /* Evict a buffer from usergart, if it is mapped there */ | |
620063e1 | 194 | static void omap_gem_evict(struct drm_gem_object *obj) |
f7f9f453 RC |
195 | { |
196 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
f4302747 | 197 | struct omap_drm_private *priv = obj->dev->dev_private; |
f7f9f453 | 198 | |
48b34ac0 | 199 | if (omap_obj->flags & OMAP_BO_TILED_MASK) { |
f7f9f453 RC |
200 | enum tiler_fmt fmt = gem2fmt(omap_obj->flags); |
201 | int i; | |
202 | ||
f7f9f453 | 203 | for (i = 0; i < NUM_USERGART_ENTRIES; i++) { |
f4302747 LP |
204 | struct omap_drm_usergart_entry *entry = |
205 | &priv->usergart[fmt].entry[i]; | |
206 | ||
f7f9f453 | 207 | if (entry->obj == obj) |
620063e1 | 208 | omap_gem_evict_entry(obj, fmt, entry); |
f7f9f453 RC |
209 | } |
210 | } | |
211 | } | |
212 | ||
7ef93b0a LP |
213 | /* ----------------------------------------------------------------------------- |
214 | * Page Management | |
8b6b569e | 215 | */ |
cd5351f4 | 216 | |
3cbd0c58 LP |
217 | /* |
218 | * Ensure backing pages are allocated. Must be called with the omap_obj.lock | |
219 | * held. | |
220 | */ | |
cd5351f4 RC |
221 | static int omap_gem_attach_pages(struct drm_gem_object *obj) |
222 | { | |
8b6b569e | 223 | struct drm_device *dev = obj->dev; |
cd5351f4 RC |
224 | struct omap_gem_object *omap_obj = to_omap_bo(obj); |
225 | struct page **pages; | |
d4eb23a9 EG |
226 | int npages = obj->size >> PAGE_SHIFT; |
227 | int i, ret; | |
8b6b569e | 228 | dma_addr_t *addrs; |
cd5351f4 | 229 | |
3cbd0c58 LP |
230 | lockdep_assert_held(&omap_obj->lock); |
231 | ||
2491244d LP |
232 | /* |
233 | * If not using shmem (in which case backing pages don't need to be | |
234 | * allocated) or if pages are already allocated we're done. | |
235 | */ | |
236 | if (!(omap_obj->flags & OMAP_BO_MEM_SHMEM) || omap_obj->pages) | |
237 | return 0; | |
cd5351f4 | 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)) { | |
6da2ec56 | 249 | addrs = kmalloc_array(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 { |
6396bb22 | 273 | addrs = kcalloc(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 | ||
3cbd0c58 | 293 | /* Release backing pages. Must be called with the omap_obj.lock held. */ |
cd5351f4 RC |
294 | static void omap_gem_detach_pages(struct drm_gem_object *obj) |
295 | { | |
296 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
930dc19c LP |
297 | unsigned int npages = obj->size >> PAGE_SHIFT; |
298 | unsigned int i; | |
f3bc9d24 | 299 | |
3cbd0c58 LP |
300 | lockdep_assert_held(&omap_obj->lock); |
301 | ||
930dc19c LP |
302 | for (i = 0; i < npages; i++) { |
303 | if (omap_obj->dma_addrs[i]) | |
304 | dma_unmap_page(obj->dev->dev, omap_obj->dma_addrs[i], | |
97817fd4 | 305 | PAGE_SIZE, DMA_TO_DEVICE); |
f3bc9d24 RC |
306 | } |
307 | ||
57c22f7c LP |
308 | kfree(omap_obj->dma_addrs); |
309 | omap_obj->dma_addrs = NULL; | |
8b6b569e | 310 | |
ddcd09d6 | 311 | drm_gem_put_pages(obj, omap_obj->pages, true, false); |
cd5351f4 RC |
312 | omap_obj->pages = NULL; |
313 | } | |
314 | ||
6ad11bc3 | 315 | /* get buffer flags */ |
dfe9cfcc | 316 | u32 omap_gem_flags(struct drm_gem_object *obj) |
6ad11bc3 RC |
317 | { |
318 | return to_omap_bo(obj)->flags; | |
319 | } | |
320 | ||
f7f9f453 RC |
321 | /** get mmap size */ |
322 | size_t omap_gem_mmap_size(struct drm_gem_object *obj) | |
323 | { | |
324 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
325 | size_t size = obj->size; | |
326 | ||
48b34ac0 | 327 | if (omap_obj->flags & OMAP_BO_TILED_MASK) { |
f7f9f453 RC |
328 | /* for tiled buffers, the virtual size has stride rounded up |
329 | * to 4kb.. (to hide the fact that row n+1 might start 16kb or | |
330 | * 32kb later!). But we don't back the entire buffer with | |
331 | * pages, only the valid picture part.. so need to adjust for | |
332 | * this in the size used to mmap and generate mmap offset | |
333 | */ | |
334 | size = tiler_vsize(gem2fmt(omap_obj->flags), | |
335 | omap_obj->width, omap_obj->height); | |
336 | } | |
337 | ||
338 | return size; | |
339 | } | |
340 | ||
7ef93b0a LP |
341 | /* ----------------------------------------------------------------------------- |
342 | * Fault Handling | |
343 | */ | |
344 | ||
f7f9f453 | 345 | /* Normal handling for the case of faulting in non-tiled buffers */ |
620063e1 | 346 | static vm_fault_t omap_gem_fault_1d(struct drm_gem_object *obj, |
f7f9f453 RC |
347 | struct vm_area_struct *vma, struct vm_fault *vmf) |
348 | { | |
349 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
350 | unsigned long pfn; | |
351 | pgoff_t pgoff; | |
352 | ||
353 | /* We don't use vmf->pgoff since that has the fake offset: */ | |
1a29d85e | 354 | pgoff = (vmf->address - vma->vm_start) >> PAGE_SHIFT; |
f7f9f453 RC |
355 | |
356 | if (omap_obj->pages) { | |
d61ce7da | 357 | omap_gem_cpu_sync_page(obj, pgoff); |
f7f9f453 RC |
358 | pfn = page_to_pfn(omap_obj->pages[pgoff]); |
359 | } else { | |
620063e1 | 360 | BUG_ON(!omap_gem_is_contiguous(omap_obj)); |
16869083 | 361 | pfn = (omap_obj->dma_addr >> PAGE_SHIFT) + pgoff; |
f7f9f453 RC |
362 | } |
363 | ||
1a29d85e | 364 | VERB("Inserting %p pfn %lx, pa %lx", (void *)vmf->address, |
f7f9f453 RC |
365 | pfn, pfn << PAGE_SHIFT); |
366 | ||
6ada1328 SJ |
367 | return vmf_insert_mixed(vma, vmf->address, |
368 | __pfn_to_pfn_t(pfn, PFN_DEV)); | |
f7f9f453 RC |
369 | } |
370 | ||
371 | /* Special handling for the case of faulting in 2d tiled buffers */ | |
620063e1 | 372 | static vm_fault_t omap_gem_fault_2d(struct drm_gem_object *obj, |
f7f9f453 RC |
373 | struct vm_area_struct *vma, struct vm_fault *vmf) |
374 | { | |
375 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
f4302747 LP |
376 | struct omap_drm_private *priv = obj->dev->dev_private; |
377 | struct omap_drm_usergart_entry *entry; | |
f7f9f453 RC |
378 | enum tiler_fmt fmt = gem2fmt(omap_obj->flags); |
379 | struct page *pages[64]; /* XXX is this too much to have on stack? */ | |
380 | unsigned long pfn; | |
381 | pgoff_t pgoff, base_pgoff; | |
1a29d85e | 382 | unsigned long vaddr; |
6ada1328 SJ |
383 | int i, err, slots; |
384 | vm_fault_t ret = VM_FAULT_NOPAGE; | |
f7f9f453 | 385 | |
e559895a RC |
386 | /* |
387 | * Note the height of the slot is also equal to the number of pages | |
388 | * that need to be mapped in to fill 4kb wide CPU page. If the slot | |
389 | * height is 64, then 64 pages fill a 4kb wide by 64 row region. | |
390 | */ | |
f4302747 LP |
391 | const int n = priv->usergart[fmt].height; |
392 | const int n_shift = priv->usergart[fmt].height_shift; | |
e559895a RC |
393 | |
394 | /* | |
395 | * If buffer width in bytes > PAGE_SIZE then the virtual stride is | |
396 | * rounded up to next multiple of PAGE_SIZE.. this need to be taken | |
397 | * into account in some of the math, so figure out virtual stride | |
398 | * in pages | |
f7f9f453 | 399 | */ |
cc8dd766 | 400 | const int m = DIV_ROUND_UP(omap_obj->width << fmt, PAGE_SIZE); |
f7f9f453 RC |
401 | |
402 | /* We don't use vmf->pgoff since that has the fake offset: */ | |
1a29d85e | 403 | pgoff = (vmf->address - vma->vm_start) >> PAGE_SHIFT; |
f7f9f453 | 404 | |
e559895a RC |
405 | /* |
406 | * Actual address we start mapping at is rounded down to previous slot | |
f7f9f453 RC |
407 | * boundary in the y direction: |
408 | */ | |
e559895a | 409 | base_pgoff = round_down(pgoff, m << n_shift); |
f7f9f453 | 410 | |
e559895a | 411 | /* figure out buffer width in slots */ |
f4302747 | 412 | slots = omap_obj->width >> priv->usergart[fmt].slot_shift; |
f7f9f453 | 413 | |
1a29d85e | 414 | vaddr = vmf->address - ((pgoff - base_pgoff) << PAGE_SHIFT); |
e559895a | 415 | |
f4302747 | 416 | entry = &priv->usergart[fmt].entry[priv->usergart[fmt].last]; |
e559895a | 417 | |
f7f9f453 RC |
418 | /* evict previous buffer using this usergart entry, if any: */ |
419 | if (entry->obj) | |
620063e1 | 420 | omap_gem_evict_entry(entry->obj, fmt, entry); |
f7f9f453 RC |
421 | |
422 | entry->obj = obj; | |
423 | entry->obj_pgoff = base_pgoff; | |
424 | ||
e559895a RC |
425 | /* now convert base_pgoff to phys offset from virt offset: */ |
426 | base_pgoff = (base_pgoff >> n_shift) * slots; | |
427 | ||
428 | /* for wider-than 4k.. figure out which part of the slot-row we want: */ | |
429 | if (m > 1) { | |
430 | int off = pgoff % m; | |
431 | entry->obj_pgoff += off; | |
432 | base_pgoff /= m; | |
433 | slots = min(slots - (off << n_shift), n); | |
434 | base_pgoff += off << n_shift; | |
435 | vaddr += off << PAGE_SHIFT; | |
436 | } | |
437 | ||
438 | /* | |
439 | * Map in pages. Beyond the valid pixel part of the buffer, we set | |
440 | * pages[i] to NULL to get a dummy page mapped in.. if someone | |
441 | * reads/writes it they will get random/undefined content, but at | |
442 | * least it won't be corrupting whatever other random page used to | |
443 | * be mapped in, or other undefined behavior. | |
f7f9f453 RC |
444 | */ |
445 | memcpy(pages, &omap_obj->pages[base_pgoff], | |
446 | sizeof(struct page *) * slots); | |
447 | memset(pages + slots, 0, | |
e559895a | 448 | sizeof(struct page *) * (n - slots)); |
f7f9f453 | 449 | |
6ada1328 SJ |
450 | err = tiler_pin(entry->block, pages, ARRAY_SIZE(pages), 0, true); |
451 | if (err) { | |
452 | ret = vmf_error(err); | |
453 | dev_err(obj->dev->dev, "failed to pin: %d\n", err); | |
f7f9f453 RC |
454 | return ret; |
455 | } | |
456 | ||
16869083 | 457 | pfn = entry->dma_addr >> PAGE_SHIFT; |
f7f9f453 | 458 | |
1a29d85e | 459 | VERB("Inserting %p pfn %lx, pa %lx", (void *)vmf->address, |
f7f9f453 RC |
460 | pfn, pfn << PAGE_SHIFT); |
461 | ||
e559895a | 462 | for (i = n; i > 0; i--) { |
6ada1328 SJ |
463 | ret = vmf_insert_mixed(vma, |
464 | vaddr, __pfn_to_pfn_t(pfn, PFN_DEV)); | |
465 | if (ret & VM_FAULT_ERROR) | |
466 | break; | |
f4302747 | 467 | pfn += priv->usergart[fmt].stride_pfn; |
e559895a | 468 | vaddr += PAGE_SIZE * m; |
f7f9f453 RC |
469 | } |
470 | ||
471 | /* simple round-robin: */ | |
f4302747 LP |
472 | priv->usergart[fmt].last = (priv->usergart[fmt].last + 1) |
473 | % NUM_USERGART_ENTRIES; | |
f7f9f453 | 474 | |
6ada1328 | 475 | return ret; |
f7f9f453 RC |
476 | } |
477 | ||
cd5351f4 RC |
478 | /** |
479 | * omap_gem_fault - pagefault handler for GEM objects | |
cd5351f4 RC |
480 | * @vmf: fault detail |
481 | * | |
482 | * Invoked when a fault occurs on an mmap of a GEM managed area. GEM | |
483 | * does most of the work for us including the actual map/unmap calls | |
484 | * but we need to do the actual page work. | |
485 | * | |
486 | * The VMA was set up by GEM. In doing so it also ensured that the | |
487 | * vma->vm_private_data points to the GEM object that is backing this | |
488 | * mapping. | |
489 | */ | |
c5ca5e02 | 490 | static vm_fault_t omap_gem_fault(struct vm_fault *vmf) |
cd5351f4 | 491 | { |
11bac800 | 492 | struct vm_area_struct *vma = vmf->vma; |
cd5351f4 RC |
493 | struct drm_gem_object *obj = vma->vm_private_data; |
494 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
6ada1328 SJ |
495 | int err; |
496 | vm_fault_t ret; | |
cd5351f4 RC |
497 | |
498 | /* Make sure we don't parallel update on a fault, nor move or remove | |
499 | * something from beneath our feet | |
500 | */ | |
3cbd0c58 | 501 | mutex_lock(&omap_obj->lock); |
cd5351f4 RC |
502 | |
503 | /* if a shmem backed object, make sure we have pages attached now */ | |
2491244d | 504 | err = omap_gem_attach_pages(obj); |
6ada1328 SJ |
505 | if (err) { |
506 | ret = vmf_error(err); | |
cd5351f4 | 507 | goto fail; |
6ada1328 | 508 | } |
cd5351f4 RC |
509 | |
510 | /* where should we do corresponding put_pages().. we are mapping | |
511 | * the original page, rather than thru a GART, so we can't rely | |
512 | * on eviction to trigger this. But munmap() or all mappings should | |
513 | * probably trigger put_pages()? | |
514 | */ | |
515 | ||
48b34ac0 | 516 | if (omap_obj->flags & OMAP_BO_TILED_MASK) |
620063e1 | 517 | ret = omap_gem_fault_2d(obj, vma, vmf); |
f7f9f453 | 518 | else |
620063e1 | 519 | ret = omap_gem_fault_1d(obj, vma, vmf); |
cd5351f4 | 520 | |
cd5351f4 RC |
521 | |
522 | fail: | |
3cbd0c58 | 523 | mutex_unlock(&omap_obj->lock); |
6ada1328 | 524 | return ret; |
cd5351f4 RC |
525 | } |
526 | ||
527 | /** We override mainly to fix up some of the vm mapping flags.. */ | |
528 | int omap_gem_mmap(struct file *filp, struct vm_area_struct *vma) | |
529 | { | |
cd5351f4 RC |
530 | int ret; |
531 | ||
532 | ret = drm_gem_mmap(filp, vma); | |
533 | if (ret) { | |
534 | DBG("mmap failed: %d", ret); | |
535 | return ret; | |
536 | } | |
537 | ||
8b6b569e RC |
538 | return omap_gem_mmap_obj(vma->vm_private_data, vma); |
539 | } | |
540 | ||
541 | int omap_gem_mmap_obj(struct drm_gem_object *obj, | |
542 | struct vm_area_struct *vma) | |
543 | { | |
544 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
cd5351f4 | 545 | |
1c71222e | 546 | vm_flags_mod(vma, VM_MIXEDMAP, VM_PFNMAP); |
cd5351f4 RC |
547 | |
548 | if (omap_obj->flags & OMAP_BO_WC) { | |
549 | vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags)); | |
550 | } else if (omap_obj->flags & OMAP_BO_UNCACHED) { | |
551 | vma->vm_page_prot = pgprot_noncached(vm_get_page_prot(vma->vm_flags)); | |
552 | } else { | |
8b6b569e RC |
553 | /* |
554 | * We do have some private objects, at least for scanout buffers | |
555 | * on hardware without DMM/TILER. But these are allocated write- | |
556 | * combine | |
557 | */ | |
558 | if (WARN_ON(!obj->filp)) | |
559 | return -EINVAL; | |
560 | ||
561 | /* | |
562 | * Shunt off cached objs to shmem file so they have their own | |
563 | * address_space (so unmap_mapping_range does what we want, | |
564 | * in particular in the case of mmap'd dmabufs) | |
565 | */ | |
8b6b569e | 566 | vma->vm_pgoff = 0; |
295992fb | 567 | vma_set_file(vma, obj->filp); |
8b6b569e | 568 | |
cd5351f4 RC |
569 | vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); |
570 | } | |
571 | ||
8b6b569e | 572 | return 0; |
cd5351f4 RC |
573 | } |
574 | ||
7ef93b0a LP |
575 | /* ----------------------------------------------------------------------------- |
576 | * Dumb Buffers | |
577 | */ | |
8b6b569e | 578 | |
cd5351f4 RC |
579 | /** |
580 | * omap_gem_dumb_create - create a dumb buffer | |
567cd704 | 581 | * @file: our client file |
cd5351f4 RC |
582 | * @dev: our device |
583 | * @args: the requested arguments copied from userspace | |
584 | * | |
585 | * Allocate a buffer suitable for use for a frame buffer of the | |
586 | * form described by user space. Give userspace a handle by which | |
587 | * to reference it. | |
588 | */ | |
589 | int omap_gem_dumb_create(struct drm_file *file, struct drm_device *dev, | |
590 | struct drm_mode_create_dumb *args) | |
591 | { | |
592 | union omap_gem_size gsize; | |
593 | ||
ce481eda | 594 | args->pitch = DIV_ROUND_UP(args->width * args->bpp, 8); |
6a5228fd | 595 | |
cd5351f4 RC |
596 | args->size = PAGE_ALIGN(args->pitch * args->height); |
597 | ||
598 | gsize = (union omap_gem_size){ | |
599 | .bytes = args->size, | |
600 | }; | |
601 | ||
602 | return omap_gem_new_handle(dev, file, gsize, | |
603 | OMAP_BO_SCANOUT | OMAP_BO_WC, &args->handle); | |
604 | } | |
605 | ||
cd5351f4 RC |
606 | /** |
607 | * omap_gem_dumb_map - buffer mapping for dumb interface | |
608 | * @file: our drm client file | |
609 | * @dev: drm device | |
610 | * @handle: GEM handle to the object (from dumb_create) | |
567cd704 | 611 | * @offset: memory map offset placeholder |
cd5351f4 RC |
612 | * |
613 | * Do the necessary setup to allow the mapping of the frame buffer | |
614 | * into user memory. We don't have to do much here at the moment. | |
615 | */ | |
616 | int omap_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev, | |
dfe9cfcc | 617 | u32 handle, u64 *offset) |
cd5351f4 RC |
618 | { |
619 | struct drm_gem_object *obj; | |
620 | int ret = 0; | |
621 | ||
cd5351f4 | 622 | /* GEM does all our handle to object mapping */ |
a8ad0bd8 | 623 | obj = drm_gem_object_lookup(file, handle); |
cd5351f4 RC |
624 | if (obj == NULL) { |
625 | ret = -ENOENT; | |
626 | goto fail; | |
627 | } | |
628 | ||
629 | *offset = omap_gem_mmap_offset(obj); | |
630 | ||
d742cdd6 | 631 | drm_gem_object_put(obj); |
cd5351f4 RC |
632 | |
633 | fail: | |
cd5351f4 RC |
634 | return ret; |
635 | } | |
636 | ||
e1c1174f | 637 | #ifdef CONFIG_DRM_FBDEV_EMULATION |
a6a91827 RC |
638 | /* Set scrolling position. This allows us to implement fast scrolling |
639 | * for console. | |
9b55b95a RC |
640 | * |
641 | * Call only from non-atomic contexts. | |
a6a91827 | 642 | */ |
dfe9cfcc | 643 | int omap_gem_roll(struct drm_gem_object *obj, u32 roll) |
a6a91827 RC |
644 | { |
645 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
dfe9cfcc | 646 | u32 npages = obj->size >> PAGE_SHIFT; |
a6a91827 RC |
647 | int ret = 0; |
648 | ||
649 | if (roll > npages) { | |
650 | dev_err(obj->dev->dev, "invalid roll: %d\n", roll); | |
651 | return -EINVAL; | |
652 | } | |
653 | ||
a6a91827 RC |
654 | omap_obj->roll = roll; |
655 | ||
3cbd0c58 | 656 | mutex_lock(&omap_obj->lock); |
af69592a | 657 | |
a6a91827 RC |
658 | /* if we aren't mapped yet, we don't need to do anything */ |
659 | if (omap_obj->block) { | |
2491244d | 660 | ret = omap_gem_attach_pages(obj); |
a6a91827 RC |
661 | if (ret) |
662 | goto fail; | |
2491244d LP |
663 | |
664 | ret = tiler_pin(omap_obj->block, omap_obj->pages, npages, | |
665 | roll, true); | |
a6a91827 RC |
666 | if (ret) |
667 | dev_err(obj->dev->dev, "could not repin: %d\n", ret); | |
668 | } | |
669 | ||
670 | fail: | |
3cbd0c58 | 671 | mutex_unlock(&omap_obj->lock); |
a6a91827 RC |
672 | |
673 | return ret; | |
674 | } | |
e1c1174f | 675 | #endif |
a6a91827 | 676 | |
7ef93b0a LP |
677 | /* ----------------------------------------------------------------------------- |
678 | * Memory Management & DMA Sync | |
679 | */ | |
680 | ||
24fbaca0 LP |
681 | /* |
682 | * shmem buffers that are mapped cached are not coherent. | |
683 | * | |
684 | * We keep track of dirty pages using page faulting to perform cache management. | |
685 | * When a page is mapped to the CPU in read/write mode the device can't access | |
686 | * it and omap_obj->dma_addrs[i] is NULL. When a page is mapped to the device | |
687 | * the omap_obj->dma_addrs[i] is set to the DMA address, and the page is | |
688 | * unmapped from the CPU. | |
7ef93b0a | 689 | */ |
620063e1 | 690 | static inline bool omap_gem_is_cached_coherent(struct drm_gem_object *obj) |
7ef93b0a LP |
691 | { |
692 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
cdb0381d | 693 | |
24fbaca0 LP |
694 | return !((omap_obj->flags & OMAP_BO_MEM_SHMEM) && |
695 | ((omap_obj->flags & OMAP_BO_CACHE_MASK) == OMAP_BO_CACHED)); | |
7ef93b0a | 696 | } |
a6a91827 | 697 | |
8b6b569e RC |
698 | /* Sync the buffer for CPU access.. note pages should already be |
699 | * attached, ie. omap_gem_get_pages() | |
700 | */ | |
d61ce7da | 701 | void omap_gem_cpu_sync_page(struct drm_gem_object *obj, int pgoff) |
8b6b569e RC |
702 | { |
703 | struct drm_device *dev = obj->dev; | |
704 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
705 | ||
620063e1 | 706 | if (omap_gem_is_cached_coherent(obj)) |
24fbaca0 LP |
707 | return; |
708 | ||
709 | if (omap_obj->dma_addrs[pgoff]) { | |
57c22f7c | 710 | dma_unmap_page(dev->dev, omap_obj->dma_addrs[pgoff], |
97817fd4 | 711 | PAGE_SIZE, DMA_TO_DEVICE); |
57c22f7c | 712 | omap_obj->dma_addrs[pgoff] = 0; |
8b6b569e RC |
713 | } |
714 | } | |
715 | ||
716 | /* sync the buffer for DMA access */ | |
d61ce7da | 717 | void omap_gem_dma_sync_buffer(struct drm_gem_object *obj, |
8b6b569e RC |
718 | enum dma_data_direction dir) |
719 | { | |
720 | struct drm_device *dev = obj->dev; | |
721 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
4fa6ce48 LP |
722 | int i, npages = obj->size >> PAGE_SHIFT; |
723 | struct page **pages = omap_obj->pages; | |
724 | bool dirty = false; | |
8b6b569e | 725 | |
620063e1 | 726 | if (omap_gem_is_cached_coherent(obj)) |
4fa6ce48 | 727 | return; |
a3d6345d | 728 | |
4fa6ce48 | 729 | for (i = 0; i < npages; i++) { |
57c22f7c | 730 | if (!omap_obj->dma_addrs[i]) { |
4fa6ce48 | 731 | dma_addr_t addr; |
a3d6345d | 732 | |
4fa6ce48 | 733 | addr = dma_map_page(dev->dev, pages[i], 0, |
97817fd4 | 734 | PAGE_SIZE, dir); |
4fa6ce48 LP |
735 | if (dma_mapping_error(dev->dev, addr)) { |
736 | dev_warn(dev->dev, "%s: failed to map page\n", | |
737 | __func__); | |
738 | break; | |
8b6b569e | 739 | } |
8b6b569e | 740 | |
4fa6ce48 | 741 | dirty = true; |
57c22f7c | 742 | omap_obj->dma_addrs[i] = addr; |
8b6b569e RC |
743 | } |
744 | } | |
4fa6ce48 LP |
745 | |
746 | if (dirty) { | |
747 | unmap_mapping_range(obj->filp->f_mapping, 0, | |
748 | omap_gem_mmap_size(obj), 1); | |
749 | } | |
8b6b569e RC |
750 | } |
751 | ||
86ad0397 ID |
752 | static int omap_gem_pin_tiler(struct drm_gem_object *obj) |
753 | { | |
754 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
755 | u32 npages = obj->size >> PAGE_SHIFT; | |
756 | enum tiler_fmt fmt = gem2fmt(omap_obj->flags); | |
757 | struct tiler_block *block; | |
758 | int ret; | |
759 | ||
760 | BUG_ON(omap_obj->block); | |
761 | ||
762 | if (omap_obj->flags & OMAP_BO_TILED_MASK) { | |
763 | block = tiler_reserve_2d(fmt, omap_obj->width, omap_obj->height, | |
764 | PAGE_SIZE); | |
765 | } else { | |
766 | block = tiler_reserve_1d(obj->size); | |
767 | } | |
768 | ||
769 | if (IS_ERR(block)) { | |
770 | ret = PTR_ERR(block); | |
771 | dev_err(obj->dev->dev, "could not remap: %d (%d)\n", ret, fmt); | |
772 | goto fail; | |
773 | } | |
774 | ||
775 | /* TODO: enable async refill.. */ | |
776 | ret = tiler_pin(block, omap_obj->pages, npages, omap_obj->roll, true); | |
777 | if (ret) { | |
778 | tiler_release(block); | |
779 | dev_err(obj->dev->dev, "could not pin: %d\n", ret); | |
780 | goto fail; | |
781 | } | |
782 | ||
783 | omap_obj->dma_addr = tiler_ssptr(block); | |
784 | omap_obj->block = block; | |
785 | ||
786 | DBG("got dma address: %pad", &omap_obj->dma_addr); | |
787 | ||
788 | fail: | |
789 | return ret; | |
790 | } | |
791 | ||
bc20c85c LP |
792 | /** |
793 | * omap_gem_pin() - Pin a GEM object in memory | |
794 | * @obj: the GEM object | |
795 | * @dma_addr: the DMA address | |
796 | * | |
797 | * Pin the given GEM object in memory and fill the dma_addr pointer with the | |
798 | * object's DMA address. If the buffer is not physically contiguous it will be | |
799 | * remapped through the TILER to provide a contiguous view. | |
800 | * | |
801 | * Pins are reference-counted, calling this function multiple times is allowed | |
802 | * as long the corresponding omap_gem_unpin() calls are balanced. | |
803 | * | |
804 | * Return 0 on success or a negative error code otherwise. | |
cd5351f4 | 805 | */ |
bc20c85c | 806 | int omap_gem_pin(struct drm_gem_object *obj, dma_addr_t *dma_addr) |
cd5351f4 | 807 | { |
a6a91827 | 808 | struct omap_drm_private *priv = obj->dev->dev_private; |
cd5351f4 RC |
809 | struct omap_gem_object *omap_obj = to_omap_bo(obj); |
810 | int ret = 0; | |
811 | ||
3cbd0c58 | 812 | mutex_lock(&omap_obj->lock); |
f7f9f453 | 813 | |
1948d28d ID |
814 | if (!omap_gem_is_contiguous(omap_obj)) { |
815 | if (refcount_read(&omap_obj->pin_cnt) == 0) { | |
f7f9f453 | 816 | |
1948d28d | 817 | refcount_set(&omap_obj->pin_cnt, 1); |
cec4fa75 | 818 | |
2491244d | 819 | ret = omap_gem_attach_pages(obj); |
f7f9f453 RC |
820 | if (ret) |
821 | goto fail; | |
822 | ||
3ccd59f9 ID |
823 | if (omap_obj->flags & OMAP_BO_SCANOUT) { |
824 | if (priv->has_dmm) { | |
825 | ret = omap_gem_pin_tiler(obj); | |
826 | if (ret) | |
827 | goto fail; | |
828 | } | |
1948d28d | 829 | } |
cec4fa75 | 830 | } else { |
1948d28d | 831 | refcount_inc(&omap_obj->pin_cnt); |
f7f9f453 | 832 | } |
cd5351f4 RC |
833 | } |
834 | ||
1948d28d ID |
835 | if (dma_addr) |
836 | *dma_addr = omap_obj->dma_addr; | |
837 | ||
f7f9f453 | 838 | fail: |
3cbd0c58 | 839 | mutex_unlock(&omap_obj->lock); |
cd5351f4 RC |
840 | |
841 | return ret; | |
842 | } | |
843 | ||
bc20c85c | 844 | /** |
d3e4c46d | 845 | * omap_gem_unpin_locked() - Unpin a GEM object from memory |
bc20c85c LP |
846 | * @obj: the GEM object |
847 | * | |
d3e4c46d | 848 | * omap_gem_unpin() without locking. |
cd5351f4 | 849 | */ |
d3e4c46d | 850 | static void omap_gem_unpin_locked(struct drm_gem_object *obj) |
cd5351f4 | 851 | { |
d9c148cf | 852 | struct omap_drm_private *priv = obj->dev->dev_private; |
f7f9f453 | 853 | struct omap_gem_object *omap_obj = to_omap_bo(obj); |
393a949f | 854 | int ret; |
f7f9f453 | 855 | |
1948d28d | 856 | if (omap_gem_is_contiguous(omap_obj)) |
d9c148cf TV |
857 | return; |
858 | ||
1948d28d | 859 | if (refcount_dec_and_test(&omap_obj->pin_cnt)) { |
fe4d0b63 ID |
860 | if (omap_obj->sgt) { |
861 | sg_free_table(omap_obj->sgt); | |
862 | kfree(omap_obj->sgt); | |
863 | omap_obj->sgt = NULL; | |
864 | } | |
3ccd59f9 ID |
865 | if (!(omap_obj->flags & OMAP_BO_SCANOUT)) |
866 | return; | |
1948d28d ID |
867 | if (priv->has_dmm) { |
868 | ret = tiler_unpin(omap_obj->block); | |
869 | if (ret) { | |
870 | dev_err(obj->dev->dev, | |
871 | "could not unpin pages: %d\n", ret); | |
872 | } | |
873 | ret = tiler_release(omap_obj->block); | |
874 | if (ret) { | |
875 | dev_err(obj->dev->dev, | |
876 | "could not release unmap: %d\n", ret); | |
877 | } | |
878 | omap_obj->dma_addr = 0; | |
879 | omap_obj->block = NULL; | |
f7f9f453 RC |
880 | } |
881 | } | |
d3e4c46d | 882 | } |
393a949f | 883 | |
d3e4c46d TV |
884 | /** |
885 | * omap_gem_unpin() - Unpin a GEM object from memory | |
886 | * @obj: the GEM object | |
887 | * | |
888 | * Unpin the given GEM object previously pinned with omap_gem_pin(). Pins are | |
889 | * reference-counted, the actual unpin will only be performed when the number | |
890 | * of calls to this function matches the number of calls to omap_gem_pin(). | |
891 | */ | |
892 | void omap_gem_unpin(struct drm_gem_object *obj) | |
893 | { | |
894 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
895 | ||
896 | mutex_lock(&omap_obj->lock); | |
897 | omap_gem_unpin_locked(obj); | |
3cbd0c58 | 898 | mutex_unlock(&omap_obj->lock); |
cd5351f4 RC |
899 | } |
900 | ||
3c810c61 RC |
901 | /* Get rotated scanout address (only valid if already pinned), at the |
902 | * specified orientation and x,y offset from top-left corner of buffer | |
903 | * (only valid for tiled 2d buffers) | |
904 | */ | |
dfe9cfcc | 905 | int omap_gem_rotated_dma_addr(struct drm_gem_object *obj, u32 orient, |
16869083 | 906 | int x, int y, dma_addr_t *dma_addr) |
3c810c61 RC |
907 | { |
908 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
909 | int ret = -EINVAL; | |
910 | ||
3cbd0c58 LP |
911 | mutex_lock(&omap_obj->lock); |
912 | ||
1948d28d | 913 | if ((refcount_read(&omap_obj->pin_cnt) > 0) && omap_obj->block && |
48b34ac0 | 914 | (omap_obj->flags & OMAP_BO_TILED_MASK)) { |
16869083 | 915 | *dma_addr = tiler_tsptr(omap_obj->block, orient, x, y); |
3c810c61 RC |
916 | ret = 0; |
917 | } | |
3cbd0c58 LP |
918 | |
919 | mutex_unlock(&omap_obj->lock); | |
920 | ||
3c810c61 RC |
921 | return ret; |
922 | } | |
923 | ||
924 | /* Get tiler stride for the buffer (only valid for 2d tiled buffers) */ | |
dfe9cfcc | 925 | int omap_gem_tiled_stride(struct drm_gem_object *obj, u32 orient) |
3c810c61 RC |
926 | { |
927 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
928 | int ret = -EINVAL; | |
48b34ac0 | 929 | if (omap_obj->flags & OMAP_BO_TILED_MASK) |
3c810c61 RC |
930 | ret = tiler_stride(gem2fmt(omap_obj->flags), orient); |
931 | return ret; | |
932 | } | |
933 | ||
6ad11bc3 RC |
934 | /* if !remap, and we don't have pages backing, then fail, rather than |
935 | * increasing the pin count (which we don't really do yet anyways, | |
936 | * because we don't support swapping pages back out). And 'remap' | |
937 | * might not be quite the right name, but I wanted to keep it working | |
bc20c85c | 938 | * similarly to omap_gem_pin(). Note though that mutex is not |
6ad11bc3 | 939 | * aquired if !remap (because this can be called in atomic ctxt), |
bc20c85c | 940 | * but probably omap_gem_unpin() should be changed to work in the |
6ad11bc3 RC |
941 | * same way. If !remap, a matching omap_gem_put_pages() call is not |
942 | * required (and should not be made). | |
943 | */ | |
944 | int omap_gem_get_pages(struct drm_gem_object *obj, struct page ***pages, | |
945 | bool remap) | |
cd5351f4 | 946 | { |
2491244d | 947 | struct omap_gem_object *omap_obj = to_omap_bo(obj); |
3cbd0c58 | 948 | int ret = 0; |
2491244d | 949 | |
3cbd0c58 LP |
950 | mutex_lock(&omap_obj->lock); |
951 | ||
952 | if (remap) { | |
953 | ret = omap_gem_attach_pages(obj); | |
954 | if (ret) | |
955 | goto unlock; | |
6ad11bc3 | 956 | } |
3cbd0c58 LP |
957 | |
958 | if (!omap_obj->pages) { | |
959 | ret = -ENOMEM; | |
960 | goto unlock; | |
961 | } | |
962 | ||
2491244d | 963 | *pages = omap_obj->pages; |
3cbd0c58 LP |
964 | |
965 | unlock: | |
966 | mutex_unlock(&omap_obj->lock); | |
967 | ||
cd5351f4 RC |
968 | return ret; |
969 | } | |
970 | ||
971 | /* release pages when DMA no longer being performed */ | |
972 | int omap_gem_put_pages(struct drm_gem_object *obj) | |
973 | { | |
974 | /* do something here if we dynamically attach/detach pages.. at | |
975 | * least they would no longer need to be pinned if everyone has | |
976 | * released the pages.. | |
977 | */ | |
978 | return 0; | |
979 | } | |
980 | ||
1948d28d ID |
981 | struct sg_table *omap_gem_get_sg(struct drm_gem_object *obj, |
982 | enum dma_data_direction dir) | |
fe4d0b63 ID |
983 | { |
984 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
985 | dma_addr_t addr; | |
986 | struct sg_table *sgt; | |
987 | struct scatterlist *sg; | |
988 | unsigned int count, len, stride, i; | |
989 | int ret; | |
990 | ||
991 | ret = omap_gem_pin(obj, &addr); | |
992 | if (ret) | |
993 | return ERR_PTR(ret); | |
994 | ||
995 | mutex_lock(&omap_obj->lock); | |
996 | ||
997 | sgt = omap_obj->sgt; | |
998 | if (sgt) | |
999 | goto out; | |
1000 | ||
1001 | sgt = kzalloc(sizeof(*sgt), GFP_KERNEL); | |
1002 | if (!sgt) { | |
1003 | ret = -ENOMEM; | |
1004 | goto err_unpin; | |
1005 | } | |
1006 | ||
1948d28d ID |
1007 | if (addr) { |
1008 | if (omap_obj->flags & OMAP_BO_TILED_MASK) { | |
1009 | enum tiler_fmt fmt = gem2fmt(omap_obj->flags); | |
fe4d0b63 | 1010 | |
1948d28d ID |
1011 | len = omap_obj->width << (int)fmt; |
1012 | count = omap_obj->height; | |
1013 | stride = tiler_stride(fmt, 0); | |
1014 | } else { | |
1015 | len = obj->size; | |
1016 | count = 1; | |
1017 | stride = 0; | |
1018 | } | |
fe4d0b63 | 1019 | } else { |
1948d28d | 1020 | count = obj->size >> PAGE_SHIFT; |
fe4d0b63 ID |
1021 | } |
1022 | ||
1023 | ret = sg_alloc_table(sgt, count, GFP_KERNEL); | |
1024 | if (ret) | |
1025 | goto err_free; | |
1026 | ||
1948d28d ID |
1027 | /* this must be after omap_gem_pin() to ensure we have pages attached */ |
1028 | omap_gem_dma_sync_buffer(obj, dir); | |
1029 | ||
1030 | if (addr) { | |
1031 | for_each_sg(sgt->sgl, sg, count, i) { | |
1032 | sg_set_page(sg, phys_to_page(addr), len, | |
1033 | offset_in_page(addr)); | |
1034 | sg_dma_address(sg) = addr; | |
1035 | sg_dma_len(sg) = len; | |
fe4d0b63 | 1036 | |
1948d28d ID |
1037 | addr += stride; |
1038 | } | |
1039 | } else { | |
1040 | for_each_sg(sgt->sgl, sg, count, i) { | |
1041 | sg_set_page(sg, omap_obj->pages[i], PAGE_SIZE, 0); | |
1042 | sg_dma_address(sg) = omap_obj->dma_addrs[i]; | |
1043 | sg_dma_len(sg) = PAGE_SIZE; | |
1044 | } | |
fe4d0b63 ID |
1045 | } |
1046 | ||
1047 | omap_obj->sgt = sgt; | |
1048 | out: | |
1049 | mutex_unlock(&omap_obj->lock); | |
1050 | return sgt; | |
1051 | ||
1052 | err_free: | |
1053 | kfree(sgt); | |
1054 | err_unpin: | |
1055 | mutex_unlock(&omap_obj->lock); | |
1056 | omap_gem_unpin(obj); | |
1057 | return ERR_PTR(ret); | |
1058 | } | |
1059 | ||
1060 | void omap_gem_put_sg(struct drm_gem_object *obj, struct sg_table *sgt) | |
1061 | { | |
1062 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
1063 | ||
1064 | if (WARN_ON(omap_obj->sgt != sgt)) | |
1065 | return; | |
1066 | ||
1067 | omap_gem_unpin(obj); | |
1068 | } | |
1069 | ||
e1c1174f | 1070 | #ifdef CONFIG_DRM_FBDEV_EMULATION |
3cbd0c58 LP |
1071 | /* |
1072 | * Get kernel virtual address for CPU access.. this more or less only | |
1073 | * exists for omap_fbdev. | |
cd5351f4 RC |
1074 | */ |
1075 | void *omap_gem_vaddr(struct drm_gem_object *obj) | |
1076 | { | |
1077 | struct omap_gem_object *omap_obj = to_omap_bo(obj); | |
3cbd0c58 LP |
1078 | void *vaddr; |
1079 | int ret; | |
1080 | ||
1081 | mutex_lock(&omap_obj->lock); | |
620063e1 | 1082 | |
3cbd0c58 | 1083 | if (!omap_obj->vaddr) { |
2491244d | 1084 | ret = omap_gem_attach_pages(obj); |
3cbd0c58 LP |
1085 | if (ret) { |
1086 | vaddr = ERR_PTR(ret); | |
1087 | goto unlock; | |
1088 | } | |
1089 | ||
2491244d | 1090 | omap_obj->vaddr = vmap(omap_obj->pages, obj->size >> PAGE_SHIFT, |
f7f9f453 RC |
1091 | VM_MAP, pgprot_writecombine(PAGE_KERNEL)); |
1092 | } | |
3cbd0c58 LP |
1093 | |
1094 | vaddr = omap_obj->vaddr; | |
1095 | ||
1096 | unlock: | |
1097 | mutex_unlock(&omap_obj->lock); | |
1098 | return vaddr; | |
cd5351f4 | 1099 | } |
e1c1174f | 1100 | #endif |
cd5351f4 | 1101 | |
7ef93b0a LP |
1102 | /* ----------------------------------------------------------------------------- |
1103 | * Power Management | |
1104 | */ | |
cd5351f4 | 1105 | |
e78edba1 AG |
1106 | #ifdef CONFIG_PM |
1107 | /* re-pin objects in DMM in resume path: */ | |
7fb15c48 | 1108 | int omap_gem_resume(struct drm_device *dev) |
e78edba1 | 1109 | { |
7fb15c48 | 1110 | struct omap_drm_private *priv = dev->dev_private; |
e78edba1 AG |
1111 | struct omap_gem_object *omap_obj; |
1112 | int ret = 0; | |
1113 | ||
5117bd89 | 1114 | mutex_lock(&priv->list_lock); |
e78edba1 AG |
1115 | list_for_each_entry(omap_obj, &priv->obj_list, mm_list) { |
1116 | if (omap_obj->block) { | |
1117 | struct drm_gem_object *obj = &omap_obj->base; | |
dfe9cfcc LP |
1118 | u32 npages = obj->size >> PAGE_SHIFT; |
1119 | ||
e78edba1 AG |
1120 | WARN_ON(!omap_obj->pages); /* this can't happen */ |
1121 | ret = tiler_pin(omap_obj->block, | |
1122 | omap_obj->pages, npages, | |
1123 | omap_obj->roll, true); | |
1124 | if (ret) { | |
7fb15c48 | 1125 | dev_err(dev->dev, "could not repin: %d\n", ret); |
5117bd89 | 1126 | goto done; |
e78edba1 AG |
1127 | } |
1128 | } | |
1129 | } | |
1130 | ||
5117bd89 DV |
1131 | done: |
1132 | mutex_unlock(&priv->list_lock); | |
1133 | return ret; | |
e78edba1 AG |
1134 | } |
1135 | #endif | |
1136 | ||
7ef93b0a LP |
1137 | /* ----------------------------------------------------------------------------- |
1138 | * DebugFS | |
1139 | */ | |
1140 | ||
f6b6036e RC |
1141 | #ifdef CONFIG_DEBUG_FS |
1142 | void omap_gem_describe(struct drm_gem_object *obj, struct seq_file *m) | |
1143 | { | |
f6b6036e | 1144 | struct omap_gem_object *omap_obj = to_omap_bo(obj); |
dfe9cfcc | 1145 | u64 off; |
f6b6036e | 1146 | |
0de23977 | 1147 | off = drm_vma_node_start(&obj->vma_node); |
f6b6036e | 1148 | |
3cbd0c58 LP |
1149 | mutex_lock(&omap_obj->lock); |
1150 | ||
2d31ca3a | 1151 | seq_printf(m, "%08x: %2d (%2d) %08llx %pad (%2d) %p %4d", |
2c935bc5 | 1152 | omap_obj->flags, obj->name, kref_read(&obj->refcount), |
cec4fa75 | 1153 | off, &omap_obj->dma_addr, |
1948d28d | 1154 | refcount_read(&omap_obj->pin_cnt), |
f6b6036e RC |
1155 | omap_obj->vaddr, omap_obj->roll); |
1156 | ||
48b34ac0 | 1157 | if (omap_obj->flags & OMAP_BO_TILED_MASK) { |
f6b6036e RC |
1158 | seq_printf(m, " %dx%d", omap_obj->width, omap_obj->height); |
1159 | if (omap_obj->block) { | |
1160 | struct tcm_area *area = &omap_obj->block->area; | |
1161 | seq_printf(m, " (%dx%d, %dx%d)", | |
1162 | area->p0.x, area->p0.y, | |
1163 | area->p1.x, area->p1.y); | |
1164 | } | |
1165 | } else { | |
2150c19b | 1166 | seq_printf(m, " %zu", obj->size); |
f6b6036e RC |
1167 | } |
1168 | ||
3cbd0c58 LP |
1169 | mutex_unlock(&omap_obj->lock); |
1170 | ||
f6b6036e RC |
1171 | seq_printf(m, "\n"); |
1172 | } | |
1173 | ||
1174 | void omap_gem_describe_objects(struct list_head *list, struct seq_file *m) | |
1175 | { | |
1176 | struct omap_gem_object *omap_obj; | |
1177 | int count = 0; | |
1178 | size_t size = 0; | |
1179 | ||
1180 | list_for_each_entry(omap_obj, list, mm_list) { | |
1181 | struct drm_gem_object *obj = &omap_obj->base; | |
1182 | seq_printf(m, " "); | |
1183 | omap_gem_describe(obj, m); | |
1184 | count++; | |
1185 | size += obj->size; | |
1186 | } | |
1187 | ||
1188 | seq_printf(m, "Total %d objects, %zu bytes\n", count, size); | |
1189 | } | |
1190 | #endif | |
1191 | ||
7ef93b0a LP |
1192 | /* ----------------------------------------------------------------------------- |
1193 | * Constructor & Destructor | |
1194 | */ | |
1195 | ||
c5ca5e02 | 1196 | static void omap_gem_free_object(struct drm_gem_object *obj) |
cd5351f4 RC |
1197 | { |
1198 | struct drm_device *dev = obj->dev; | |
76c4055f | 1199 | struct omap_drm_private *priv = dev->dev_private; |
cd5351f4 RC |
1200 | struct omap_gem_object *omap_obj = to_omap_bo(obj); |
1201 | ||
620063e1 | 1202 | omap_gem_evict(obj); |
f7f9f453 | 1203 | |
5117bd89 | 1204 | mutex_lock(&priv->list_lock); |
f6b6036e | 1205 | list_del(&omap_obj->mm_list); |
5117bd89 | 1206 | mutex_unlock(&priv->list_lock); |
f6b6036e | 1207 | |
3cbd0c58 LP |
1208 | /* |
1209 | * We own the sole reference to the object at this point, but to keep | |
1210 | * lockdep happy, we must still take the omap_obj_lock to call | |
1211 | * omap_gem_detach_pages(). This should hardly make any difference as | |
1212 | * there can't be any lock contention. | |
9a0774e0 | 1213 | */ |
3cbd0c58 LP |
1214 | mutex_lock(&omap_obj->lock); |
1215 | ||
1216 | /* The object should not be pinned. */ | |
1948d28d | 1217 | WARN_ON(refcount_read(&omap_obj->pin_cnt) > 0); |
9a0774e0 | 1218 | |
3f50effd TV |
1219 | if (omap_obj->pages) { |
1220 | if (omap_obj->flags & OMAP_BO_MEM_DMABUF) | |
1221 | kfree(omap_obj->pages); | |
1222 | else | |
cd5351f4 | 1223 | omap_gem_detach_pages(obj); |
3f50effd | 1224 | } |
ae053039 | 1225 | |
3f50effd | 1226 | if (omap_obj->flags & OMAP_BO_MEM_DMA_API) { |
266c73b7 | 1227 | dma_free_wc(dev->dev, obj->size, omap_obj->vaddr, |
16869083 | 1228 | omap_obj->dma_addr); |
3f50effd TV |
1229 | } else if (omap_obj->vaddr) { |
1230 | vunmap(omap_obj->vaddr); | |
1231 | } else if (obj->import_attach) { | |
1232 | drm_prime_gem_destroy(obj, omap_obj->sgt); | |
cd5351f4 RC |
1233 | } |
1234 | ||
3cbd0c58 LP |
1235 | mutex_unlock(&omap_obj->lock); |
1236 | ||
cd5351f4 RC |
1237 | drm_gem_object_release(obj); |
1238 | ||
3cbd0c58 LP |
1239 | mutex_destroy(&omap_obj->lock); |
1240 | ||
00e9c7c7 | 1241 | kfree(omap_obj); |
cd5351f4 RC |
1242 | } |
1243 | ||
4ecc5fbc TV |
1244 | static bool omap_gem_validate_flags(struct drm_device *dev, u32 flags) |
1245 | { | |
1246 | struct omap_drm_private *priv = dev->dev_private; | |
1247 | ||
1248 | switch (flags & OMAP_BO_CACHE_MASK) { | |
1249 | case OMAP_BO_CACHED: | |
1250 | case OMAP_BO_WC: | |
1251 | case OMAP_BO_CACHE_MASK: | |
1252 | break; | |
1253 | ||
1254 | default: | |
1255 | return false; | |
1256 | } | |
1257 | ||
1258 | if (flags & OMAP_BO_TILED_MASK) { | |
1259 | if (!priv->usergart) | |
1260 | return false; | |
1261 | ||
1262 | switch (flags & OMAP_BO_TILED_MASK) { | |
1263 | case OMAP_BO_TILED_8: | |
1264 | case OMAP_BO_TILED_16: | |
1265 | case OMAP_BO_TILED_32: | |
1266 | break; | |
1267 | ||
1268 | default: | |
1269 | return false; | |
1270 | } | |
1271 | } | |
1272 | ||
1273 | return true; | |
1274 | } | |
1275 | ||
c5ca5e02 TZ |
1276 | static const struct vm_operations_struct omap_gem_vm_ops = { |
1277 | .fault = omap_gem_fault, | |
1278 | .open = drm_gem_vm_open, | |
1279 | .close = drm_gem_vm_close, | |
1280 | }; | |
1281 | ||
1282 | static const struct drm_gem_object_funcs omap_gem_object_funcs = { | |
1283 | .free = omap_gem_free_object, | |
1284 | .export = omap_gem_prime_export, | |
1285 | .vm_ops = &omap_gem_vm_ops, | |
1286 | }; | |
1287 | ||
a96bf3cb | 1288 | /* GEM buffer object constructor */ |
cd5351f4 | 1289 | struct drm_gem_object *omap_gem_new(struct drm_device *dev, |
dfe9cfcc | 1290 | union omap_gem_size gsize, u32 flags) |
cd5351f4 | 1291 | { |
a6a91827 | 1292 | struct omap_drm_private *priv = dev->dev_private; |
cd5351f4 | 1293 | struct omap_gem_object *omap_obj; |
92b4b445 | 1294 | struct drm_gem_object *obj; |
ab5a60c3 | 1295 | struct address_space *mapping; |
cd5351f4 RC |
1296 | size_t size; |
1297 | int ret; | |
1298 | ||
4ecc5fbc TV |
1299 | if (!omap_gem_validate_flags(dev, flags)) |
1300 | return NULL; | |
1301 | ||
9cba3b99 | 1302 | /* Validate the flags and compute the memory and cache flags. */ |
48b34ac0 | 1303 | if (flags & OMAP_BO_TILED_MASK) { |
9cba3b99 LP |
1304 | /* |
1305 | * Tiled buffers are always shmem paged backed. When they are | |
1306 | * scanned out, they are remapped into DMM/TILER. | |
f7f9f453 | 1307 | */ |
9cba3b99 | 1308 | flags |= OMAP_BO_MEM_SHMEM; |
f7f9f453 | 1309 | |
9cba3b99 LP |
1310 | /* |
1311 | * Currently don't allow cached buffers. There is some caching | |
1312 | * stuff that needs to be handled better. | |
f7f9f453 | 1313 | */ |
7cb0d6c1 TV |
1314 | flags &= ~(OMAP_BO_CACHED|OMAP_BO_WC|OMAP_BO_UNCACHED); |
1315 | flags |= tiler_get_cpu_cache_flags(); | |
a96bf3cb | 1316 | } else if ((flags & OMAP_BO_SCANOUT) && !priv->has_dmm) { |
9cba3b99 | 1317 | /* |
18d7f5ab TV |
1318 | * If we don't have DMM, we must allocate scanout buffers |
1319 | * from contiguous DMA memory. | |
9cba3b99 LP |
1320 | */ |
1321 | flags |= OMAP_BO_MEM_DMA_API; | |
3f50effd | 1322 | } else if (!(flags & OMAP_BO_MEM_DMABUF)) { |
9cba3b99 | 1323 | /* |
3f50effd | 1324 | * All other buffers not backed by dma_buf are shmem-backed. |
9cba3b99 LP |
1325 | */ |
1326 | flags |= OMAP_BO_MEM_SHMEM; | |
f7f9f453 | 1327 | } |
cd5351f4 | 1328 | |
9cba3b99 | 1329 | /* Allocate the initialize the OMAP GEM object. */ |
cd5351f4 | 1330 | omap_obj = kzalloc(sizeof(*omap_obj), GFP_KERNEL); |
78110bb8 | 1331 | if (!omap_obj) |
a903e3b6 | 1332 | return NULL; |
f6b6036e | 1333 | |
cd5351f4 | 1334 | obj = &omap_obj->base; |
9cba3b99 | 1335 | omap_obj->flags = flags; |
3cbd0c58 | 1336 | mutex_init(&omap_obj->lock); |
cd5351f4 | 1337 | |
48b34ac0 | 1338 | if (flags & OMAP_BO_TILED_MASK) { |
9cba3b99 LP |
1339 | /* |
1340 | * For tiled buffers align dimensions to slot boundaries and | |
1341 | * calculate size based on aligned dimensions. | |
a6a91827 | 1342 | */ |
9cba3b99 LP |
1343 | tiler_align(gem2fmt(flags), &gsize.tiled.width, |
1344 | &gsize.tiled.height); | |
ae053039 | 1345 | |
9cba3b99 LP |
1346 | size = tiler_size(gem2fmt(flags), gsize.tiled.width, |
1347 | gsize.tiled.height); | |
cd5351f4 | 1348 | |
f7f9f453 RC |
1349 | omap_obj->width = gsize.tiled.width; |
1350 | omap_obj->height = gsize.tiled.height; | |
9cba3b99 LP |
1351 | } else { |
1352 | size = PAGE_ALIGN(gsize.bytes); | |
f7f9f453 RC |
1353 | } |
1354 | ||
c5ca5e02 TZ |
1355 | obj->funcs = &omap_gem_object_funcs; |
1356 | ||
9cba3b99 LP |
1357 | /* Initialize the GEM object. */ |
1358 | if (!(flags & OMAP_BO_MEM_SHMEM)) { | |
89c8233f | 1359 | drm_gem_private_object_init(dev, obj, size); |
ab5a60c3 | 1360 | } else { |
cd5351f4 | 1361 | ret = drm_gem_object_init(dev, obj, size); |
ab5a60c3 | 1362 | if (ret) |
c2eb77ff | 1363 | goto err_free; |
cd5351f4 | 1364 | |
93c76a3d | 1365 | mapping = obj->filp->f_mapping; |
ab5a60c3 DH |
1366 | mapping_set_gfp_mask(mapping, GFP_USER | __GFP_DMA32); |
1367 | } | |
cd5351f4 | 1368 | |
c2eb77ff LP |
1369 | /* Allocate memory if needed. */ |
1370 | if (flags & OMAP_BO_MEM_DMA_API) { | |
266c73b7 | 1371 | omap_obj->vaddr = dma_alloc_wc(dev->dev, size, |
16869083 | 1372 | &omap_obj->dma_addr, |
266c73b7 | 1373 | GFP_KERNEL); |
c2eb77ff LP |
1374 | if (!omap_obj->vaddr) |
1375 | goto err_release; | |
1376 | } | |
1377 | ||
5117bd89 | 1378 | mutex_lock(&priv->list_lock); |
c2eb77ff | 1379 | list_add(&omap_obj->mm_list, &priv->obj_list); |
5117bd89 | 1380 | mutex_unlock(&priv->list_lock); |
c2eb77ff | 1381 | |
cd5351f4 RC |
1382 | return obj; |
1383 | ||
c2eb77ff LP |
1384 | err_release: |
1385 | drm_gem_object_release(obj); | |
1386 | err_free: | |
1387 | kfree(omap_obj); | |
cd5351f4 RC |
1388 | return NULL; |
1389 | } | |
f7f9f453 | 1390 | |
b22e6690 LP |
1391 | struct drm_gem_object *omap_gem_new_dmabuf(struct drm_device *dev, size_t size, |
1392 | struct sg_table *sgt) | |
1393 | { | |
1394 | struct omap_drm_private *priv = dev->dev_private; | |
1395 | struct omap_gem_object *omap_obj; | |
1396 | struct drm_gem_object *obj; | |
1397 | union omap_gem_size gsize; | |
1398 | ||
1399 | /* Without a DMM only physically contiguous buffers can be supported. */ | |
1400 | if (sgt->orig_nents != 1 && !priv->has_dmm) | |
1401 | return ERR_PTR(-EINVAL); | |
1402 | ||
b22e6690 LP |
1403 | gsize.bytes = PAGE_ALIGN(size); |
1404 | obj = omap_gem_new(dev, gsize, OMAP_BO_MEM_DMABUF | OMAP_BO_WC); | |
3cbd0c58 LP |
1405 | if (!obj) |
1406 | return ERR_PTR(-ENOMEM); | |
b22e6690 LP |
1407 | |
1408 | omap_obj = to_omap_bo(obj); | |
3cbd0c58 LP |
1409 | |
1410 | mutex_lock(&omap_obj->lock); | |
1411 | ||
b22e6690 LP |
1412 | omap_obj->sgt = sgt; |
1413 | ||
1414 | if (sgt->orig_nents == 1) { | |
16869083 | 1415 | omap_obj->dma_addr = sg_dma_address(sgt->sgl); |
b22e6690 LP |
1416 | } else { |
1417 | /* Create pages list from sgt */ | |
b22e6690 LP |
1418 | struct page **pages; |
1419 | unsigned int npages; | |
53760655 | 1420 | unsigned int ret; |
b22e6690 LP |
1421 | |
1422 | npages = DIV_ROUND_UP(size, PAGE_SIZE); | |
1423 | pages = kcalloc(npages, sizeof(*pages), GFP_KERNEL); | |
1424 | if (!pages) { | |
1425 | omap_gem_free_object(obj); | |
1426 | obj = ERR_PTR(-ENOMEM); | |
1427 | goto done; | |
1428 | } | |
1429 | ||
1430 | omap_obj->pages = pages; | |
c67e6279 | 1431 | ret = drm_prime_sg_to_page_array(sgt, pages, npages); |
53760655 | 1432 | if (ret) { |
b22e6690 LP |
1433 | omap_gem_free_object(obj); |
1434 | obj = ERR_PTR(-ENOMEM); | |
1435 | goto done; | |
1436 | } | |
1437 | } | |
1438 | ||
1439 | done: | |
3cbd0c58 | 1440 | mutex_unlock(&omap_obj->lock); |
b22e6690 LP |
1441 | return obj; |
1442 | } | |
1443 | ||
7ef93b0a LP |
1444 | /* convenience method to construct a GEM buffer object, and userspace handle */ |
1445 | int omap_gem_new_handle(struct drm_device *dev, struct drm_file *file, | |
dfe9cfcc | 1446 | union omap_gem_size gsize, u32 flags, u32 *handle) |
7ef93b0a LP |
1447 | { |
1448 | struct drm_gem_object *obj; | |
1449 | int ret; | |
1450 | ||
1451 | obj = omap_gem_new(dev, gsize, flags); | |
1452 | if (!obj) | |
1453 | return -ENOMEM; | |
1454 | ||
1455 | ret = drm_gem_handle_create(file, obj, handle); | |
1456 | if (ret) { | |
cd5351f4 | 1457 | omap_gem_free_object(obj); |
7ef93b0a LP |
1458 | return ret; |
1459 | } | |
ae053039 | 1460 | |
7ef93b0a | 1461 | /* drop reference from allocate - handle holds it now */ |
d742cdd6 | 1462 | drm_gem_object_put(obj); |
7ef93b0a LP |
1463 | |
1464 | return 0; | |
cd5351f4 | 1465 | } |
f7f9f453 | 1466 | |
7ef93b0a LP |
1467 | /* ----------------------------------------------------------------------------- |
1468 | * Init & Cleanup | |
1469 | */ | |
1470 | ||
1471 | /* If DMM is used, we need to set some stuff up.. */ | |
f7f9f453 RC |
1472 | void omap_gem_init(struct drm_device *dev) |
1473 | { | |
a6a91827 | 1474 | struct omap_drm_private *priv = dev->dev_private; |
f4302747 | 1475 | struct omap_drm_usergart *usergart; |
f7f9f453 RC |
1476 | const enum tiler_fmt fmts[] = { |
1477 | TILFMT_8BIT, TILFMT_16BIT, TILFMT_32BIT | |
1478 | }; | |
5c137797 | 1479 | int i, j; |
f7f9f453 | 1480 | |
e5e4e9b7 | 1481 | if (!dmm_is_available()) { |
f7f9f453 | 1482 | /* DMM only supported on OMAP4 and later, so this isn't fatal */ |
5c137797 | 1483 | dev_warn(dev->dev, "DMM not available, disable DMM support\n"); |
f7f9f453 RC |
1484 | return; |
1485 | } | |
1486 | ||
78110bb8 JP |
1487 | usergart = kcalloc(3, sizeof(*usergart), GFP_KERNEL); |
1488 | if (!usergart) | |
b369839b | 1489 | return; |
f7f9f453 RC |
1490 | |
1491 | /* reserve 4k aligned/wide regions for userspace mappings: */ | |
1492 | for (i = 0; i < ARRAY_SIZE(fmts); i++) { | |
dfe9cfcc LP |
1493 | u16 h = 1, w = PAGE_SIZE >> i; |
1494 | ||
f7f9f453 RC |
1495 | tiler_align(fmts[i], &w, &h); |
1496 | /* note: since each region is 1 4kb page wide, and minimum | |
1497 | * number of rows, the height ends up being the same as the | |
1498 | * # of pages in the region | |
1499 | */ | |
1500 | usergart[i].height = h; | |
1501 | usergart[i].height_shift = ilog2(h); | |
3c810c61 | 1502 | usergart[i].stride_pfn = tiler_stride(fmts[i], 0) >> PAGE_SHIFT; |
f7f9f453 RC |
1503 | usergart[i].slot_shift = ilog2((PAGE_SIZE / h) >> i); |
1504 | for (j = 0; j < NUM_USERGART_ENTRIES; j++) { | |
f4302747 LP |
1505 | struct omap_drm_usergart_entry *entry; |
1506 | struct tiler_block *block; | |
1507 | ||
1508 | entry = &usergart[i].entry[j]; | |
1509 | block = tiler_reserve_2d(fmts[i], w, h, PAGE_SIZE); | |
f7f9f453 RC |
1510 | if (IS_ERR(block)) { |
1511 | dev_err(dev->dev, | |
1512 | "reserve failed: %d, %d, %ld\n", | |
1513 | i, j, PTR_ERR(block)); | |
1514 | return; | |
1515 | } | |
16869083 | 1516 | entry->dma_addr = tiler_ssptr(block); |
f7f9f453 RC |
1517 | entry->block = block; |
1518 | ||
16869083 LP |
1519 | DBG("%d:%d: %dx%d: dma_addr=%pad stride=%d", i, j, w, h, |
1520 | &entry->dma_addr, | |
f7f9f453 RC |
1521 | usergart[i].stride_pfn << PAGE_SHIFT); |
1522 | } | |
1523 | } | |
a6a91827 | 1524 | |
f4302747 | 1525 | priv->usergart = usergart; |
a6a91827 | 1526 | priv->has_dmm = true; |
f7f9f453 RC |
1527 | } |
1528 | ||
1529 | void omap_gem_deinit(struct drm_device *dev) | |
1530 | { | |
f4302747 LP |
1531 | struct omap_drm_private *priv = dev->dev_private; |
1532 | ||
f7f9f453 RC |
1533 | /* I believe we can rely on there being no more outstanding GEM |
1534 | * objects which could depend on usergart/dmm at this point. | |
1535 | */ | |
f4302747 | 1536 | kfree(priv->usergart); |
f7f9f453 | 1537 | } |