blob: f90531fc00c911a01f795fbd692c33e74a939bb9 [file] [log] [blame]
Rob Clarkcd5351f2011-11-12 12:09:40 -06001/*
Rob Clark8bb0daf2013-02-11 12:43:09 -05002 * drivers/gpu/drm/omapdrm/omap_gem.c
Rob Clarkcd5351f2011-11-12 12:09:40 -06003 *
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
20
21#include <linux/spinlock.h>
22#include <linux/shmem_fs.h>
David Herrmann0de23972013-07-24 21:07:52 +020023#include <drm/drm_vma_manager.h>
Rob Clarkcd5351f2011-11-12 12:09:40 -060024
25#include "omap_drv.h"
Rob Clarkf7f9f452011-12-05 19:19:22 -060026#include "omap_dmm_tiler.h"
Rob Clarkcd5351f2011-11-12 12:09:40 -060027
28/* remove these once drm core helpers are merged */
YAMANE Toshiaki801d5bc2012-11-14 19:32:56 +090029struct page **_drm_gem_get_pages(struct drm_gem_object *obj, gfp_t gfpmask);
Rob Clarkcd5351f2011-11-12 12:09:40 -060030void _drm_gem_put_pages(struct drm_gem_object *obj, struct page **pages,
31 bool dirty, bool accessed);
Rob Clarkf7f9f452011-12-05 19:19:22 -060032int _drm_gem_create_mmap_offset_size(struct drm_gem_object *obj, size_t size);
Rob Clarkcd5351f2011-11-12 12:09:40 -060033
34/*
35 * GEM buffer object implementation.
36 */
37
38#define to_omap_bo(x) container_of(x, struct omap_gem_object, base)
39
40/* note: we use upper 8 bits of flags for driver-internal flags: */
41#define OMAP_BO_DMA 0x01000000 /* actually is physically contiguous */
42#define OMAP_BO_EXT_SYNC 0x02000000 /* externally allocated sync object */
43#define OMAP_BO_EXT_MEM 0x04000000 /* externally allocated memory */
44
45
46struct omap_gem_object {
47 struct drm_gem_object base;
48
Rob Clarkf6b60362012-03-05 10:48:36 -060049 struct list_head mm_list;
50
Rob Clarkcd5351f2011-11-12 12:09:40 -060051 uint32_t flags;
52
Rob Clarkf7f9f452011-12-05 19:19:22 -060053 /** width/height for tiled formats (rounded up to slot boundaries) */
54 uint16_t width, height;
55
Rob Clarka6a91822011-12-09 23:26:08 -060056 /** roll applied when mapping to DMM */
57 uint32_t roll;
58
Rob Clarkcd5351f2011-11-12 12:09:40 -060059 /**
60 * If buffer is allocated physically contiguous, the OMAP_BO_DMA flag
Rob Clarkf7f9f452011-12-05 19:19:22 -060061 * is set and the paddr is valid. Also if the buffer is remapped in
62 * TILER and paddr_cnt > 0, then paddr is valid. But if you are using
63 * the physical address and OMAP_BO_DMA is not set, then you should
64 * be going thru omap_gem_{get,put}_paddr() to ensure the mapping is
65 * not removed from under your feet.
Rob Clarkcd5351f2011-11-12 12:09:40 -060066 *
67 * Note that OMAP_BO_SCANOUT is a hint from userspace that DMA capable
68 * buffer is requested, but doesn't mean that it is. Use the
69 * OMAP_BO_DMA flag to determine if the buffer has a DMA capable
70 * physical address.
71 */
72 dma_addr_t paddr;
73
74 /**
Rob Clarkf7f9f452011-12-05 19:19:22 -060075 * # of users of paddr
76 */
77 uint32_t paddr_cnt;
78
79 /**
80 * tiler block used when buffer is remapped in DMM/TILER.
81 */
82 struct tiler_block *block;
83
84 /**
Rob Clarkcd5351f2011-11-12 12:09:40 -060085 * Array of backing pages, if allocated. Note that pages are never
86 * allocated for buffers originally allocated from contiguous memory
87 */
88 struct page **pages;
89
Rob Clarkf3bc9d22011-12-20 16:54:28 -060090 /** addresses corresponding to pages in above array */
91 dma_addr_t *addrs;
92
Rob Clarkcd5351f2011-11-12 12:09:40 -060093 /**
94 * Virtual address, if mapped.
95 */
96 void *vaddr;
97
98 /**
99 * sync-object allocated on demand (if needed)
100 *
101 * Per-buffer sync-object for tracking pending and completed hw/dma
102 * read and write operations. The layout in memory is dictated by
103 * the SGX firmware, which uses this information to stall the command
104 * stream if a surface is not ready yet.
105 *
106 * Note that when buffer is used by SGX, the sync-object needs to be
107 * allocated from a special heap of sync-objects. This way many sync
108 * objects can be packed in a page, and not waste GPU virtual address
109 * space. Because of this we have to have a omap_gem_set_sync_object()
110 * API to allow replacement of the syncobj after it has (potentially)
111 * already been allocated. A bit ugly but I haven't thought of a
112 * better alternative.
113 */
114 struct {
115 uint32_t write_pending;
116 uint32_t write_complete;
117 uint32_t read_pending;
118 uint32_t read_complete;
119 } *sync;
120};
121
Rob Clarkc5b12472012-01-18 18:33:02 -0600122static int get_pages(struct drm_gem_object *obj, struct page ***pages);
123static uint64_t mmap_offset(struct drm_gem_object *obj);
124
Rob Clarkf7f9f452011-12-05 19:19:22 -0600125/* To deal with userspace mmap'ings of 2d tiled buffers, which (a) are
126 * not necessarily pinned in TILER all the time, and (b) when they are
127 * they are not necessarily page aligned, we reserve one or more small
128 * regions in each of the 2d containers to use as a user-GART where we
129 * can create a second page-aligned mapping of parts of the buffer
130 * being accessed from userspace.
131 *
132 * Note that we could optimize slightly when we know that multiple
133 * tiler containers are backed by the same PAT.. but I'll leave that
134 * for later..
135 */
136#define NUM_USERGART_ENTRIES 2
137struct usergart_entry {
138 struct tiler_block *block; /* the reserved tiler block */
139 dma_addr_t paddr;
140 struct drm_gem_object *obj; /* the current pinned obj */
141 pgoff_t obj_pgoff; /* page offset of obj currently
142 mapped in */
143};
144static struct {
145 struct usergart_entry entry[NUM_USERGART_ENTRIES];
146 int height; /* height in rows */
147 int height_shift; /* ilog2(height in rows) */
148 int slot_shift; /* ilog2(width per slot) */
149 int stride_pfn; /* stride in pages */
150 int last; /* index of last used entry */
151} *usergart;
152
153static void evict_entry(struct drm_gem_object *obj,
154 enum tiler_fmt fmt, struct usergart_entry *entry)
155{
156 if (obj->dev->dev_mapping) {
Rob Clarke5598952012-03-05 10:48:40 -0600157 struct omap_gem_object *omap_obj = to_omap_bo(obj);
158 int n = usergart[fmt].height;
159 size_t size = PAGE_SIZE * n;
Rob Clarkc5b12472012-01-18 18:33:02 -0600160 loff_t off = mmap_offset(obj) +
Rob Clarkf7f9f452011-12-05 19:19:22 -0600161 (entry->obj_pgoff << PAGE_SHIFT);
Rob Clarke5598952012-03-05 10:48:40 -0600162 const int m = 1 + ((omap_obj->width << fmt) / PAGE_SIZE);
163 if (m > 1) {
164 int i;
165 /* if stride > than PAGE_SIZE then sparse mapping: */
166 for (i = n; i > 0; i--) {
167 unmap_mapping_range(obj->dev->dev_mapping,
168 off, PAGE_SIZE, 1);
169 off += PAGE_SIZE * m;
170 }
171 } else {
172 unmap_mapping_range(obj->dev->dev_mapping, off, size, 1);
173 }
Rob Clarkf7f9f452011-12-05 19:19:22 -0600174 }
175
176 entry->obj = NULL;
177}
178
179/* Evict a buffer from usergart, if it is mapped there */
180static void evict(struct drm_gem_object *obj)
181{
182 struct omap_gem_object *omap_obj = to_omap_bo(obj);
183
184 if (omap_obj->flags & OMAP_BO_TILED) {
185 enum tiler_fmt fmt = gem2fmt(omap_obj->flags);
186 int i;
187
188 if (!usergart)
189 return;
190
191 for (i = 0; i < NUM_USERGART_ENTRIES; i++) {
192 struct usergart_entry *entry = &usergart[fmt].entry[i];
193 if (entry->obj == obj)
194 evict_entry(obj, fmt, entry);
195 }
196 }
197}
198
Rob Clarkcd5351f2011-11-12 12:09:40 -0600199/* GEM objects can either be allocated from contiguous memory (in which
200 * case obj->filp==NULL), or w/ shmem backing (obj->filp!=NULL). But non
201 * contiguous buffers can be remapped in TILER/DMM if they need to be
202 * contiguous... but we don't do this all the time to reduce pressure
203 * on TILER/DMM space when we know at allocation time that the buffer
204 * will need to be scanned out.
205 */
206static inline bool is_shmem(struct drm_gem_object *obj)
207{
208 return obj->filp != NULL;
209}
210
Rob Clark8b6b5692012-05-17 02:37:25 -0600211/**
212 * shmem buffers that are mapped cached can simulate coherency via using
213 * page faulting to keep track of dirty pages
214 */
215static inline bool is_cached_coherent(struct drm_gem_object *obj)
216{
217 struct omap_gem_object *omap_obj = to_omap_bo(obj);
218 return is_shmem(obj) &&
219 ((omap_obj->flags & OMAP_BO_CACHE_MASK) == OMAP_BO_CACHED);
220}
221
Rob Clarkcd5351f2011-11-12 12:09:40 -0600222static DEFINE_SPINLOCK(sync_lock);
223
224/** ensure backing pages are allocated */
225static int omap_gem_attach_pages(struct drm_gem_object *obj)
226{
Rob Clark8b6b5692012-05-17 02:37:25 -0600227 struct drm_device *dev = obj->dev;
Rob Clarkcd5351f2011-11-12 12:09:40 -0600228 struct omap_gem_object *omap_obj = to_omap_bo(obj);
229 struct page **pages;
Emil Gooded4eb23a2012-08-17 18:53:26 +0200230 int npages = obj->size >> PAGE_SHIFT;
231 int i, ret;
Rob Clark8b6b5692012-05-17 02:37:25 -0600232 dma_addr_t *addrs;
Rob Clarkcd5351f2011-11-12 12:09:40 -0600233
234 WARN_ON(omap_obj->pages);
235
236 /* TODO: __GFP_DMA32 .. but somehow GFP_HIGHMEM is coming from the
237 * mapping_gfp_mask(mapping) which conflicts w/ GFP_DMA32.. probably
238 * we actually want CMA memory for it all anyways..
239 */
240 pages = _drm_gem_get_pages(obj, GFP_KERNEL);
241 if (IS_ERR(pages)) {
242 dev_err(obj->dev->dev, "could not get pages: %ld\n", PTR_ERR(pages));
243 return PTR_ERR(pages);
244 }
245
Rob Clarkf3bc9d22011-12-20 16:54:28 -0600246 /* for non-cached buffers, ensure the new pages are clean because
247 * DSS, GPU, etc. are not cache coherent:
248 */
249 if (omap_obj->flags & (OMAP_BO_WC|OMAP_BO_UNCACHED)) {
Vincent Penquerc'h23d84ed2012-10-09 19:40:39 +0100250 addrs = kmalloc(npages * sizeof(*addrs), GFP_KERNEL);
Emil Gooded4eb23a2012-08-17 18:53:26 +0200251 if (!addrs) {
252 ret = -ENOMEM;
253 goto free_pages;
254 }
255
Rob Clarkf3bc9d22011-12-20 16:54:28 -0600256 for (i = 0; i < npages; i++) {
Rob Clark8b6b5692012-05-17 02:37:25 -0600257 addrs[i] = dma_map_page(dev->dev, pages[i],
Rob Clarkf3bc9d22011-12-20 16:54:28 -0600258 0, PAGE_SIZE, DMA_BIDIRECTIONAL);
259 }
Rob Clark8b6b5692012-05-17 02:37:25 -0600260 } else {
Vincent Penquerc'h23d84ed2012-10-09 19:40:39 +0100261 addrs = kzalloc(npages * sizeof(*addrs), GFP_KERNEL);
Emil Gooded4eb23a2012-08-17 18:53:26 +0200262 if (!addrs) {
263 ret = -ENOMEM;
264 goto free_pages;
265 }
Rob Clarkf3bc9d22011-12-20 16:54:28 -0600266 }
267
Rob Clark8b6b5692012-05-17 02:37:25 -0600268 omap_obj->addrs = addrs;
Rob Clarkcd5351f2011-11-12 12:09:40 -0600269 omap_obj->pages = pages;
Rob Clark8b6b5692012-05-17 02:37:25 -0600270
Rob Clarkcd5351f2011-11-12 12:09:40 -0600271 return 0;
Emil Gooded4eb23a2012-08-17 18:53:26 +0200272
273free_pages:
274 _drm_gem_put_pages(obj, pages, true, false);
275
276 return ret;
Rob Clarkcd5351f2011-11-12 12:09:40 -0600277}
278
279/** release backing pages */
280static void omap_gem_detach_pages(struct drm_gem_object *obj)
281{
282 struct omap_gem_object *omap_obj = to_omap_bo(obj);
Rob Clarkf3bc9d22011-12-20 16:54:28 -0600283
284 /* for non-cached buffers, ensure the new pages are clean because
285 * DSS, GPU, etc. are not cache coherent:
286 */
287 if (omap_obj->flags & (OMAP_BO_WC|OMAP_BO_UNCACHED)) {
288 int i, npages = obj->size >> PAGE_SHIFT;
289 for (i = 0; i < npages; i++) {
290 dma_unmap_page(obj->dev->dev, omap_obj->addrs[i],
291 PAGE_SIZE, DMA_BIDIRECTIONAL);
292 }
Rob Clarkf3bc9d22011-12-20 16:54:28 -0600293 }
294
Rob Clark8b6b5692012-05-17 02:37:25 -0600295 kfree(omap_obj->addrs);
296 omap_obj->addrs = NULL;
297
Rob Clarkcd5351f2011-11-12 12:09:40 -0600298 _drm_gem_put_pages(obj, omap_obj->pages, true, false);
299 omap_obj->pages = NULL;
300}
301
Rob Clark6ad11bc2012-04-10 13:19:55 -0500302/* get buffer flags */
303uint32_t omap_gem_flags(struct drm_gem_object *obj)
304{
305 return to_omap_bo(obj)->flags;
306}
307
Rob Clarkcd5351f2011-11-12 12:09:40 -0600308/** get mmap offset */
Rob Clarkc5b12472012-01-18 18:33:02 -0600309static uint64_t mmap_offset(struct drm_gem_object *obj)
Rob Clarkcd5351f2011-11-12 12:09:40 -0600310{
Rob Clarkf6b60362012-03-05 10:48:36 -0600311 struct drm_device *dev = obj->dev;
David Herrmann0de23972013-07-24 21:07:52 +0200312 int ret;
313 size_t size;
Rob Clarkf6b60362012-03-05 10:48:36 -0600314
315 WARN_ON(!mutex_is_locked(&dev->struct_mutex));
316
David Herrmann0de23972013-07-24 21:07:52 +0200317 /* Make it mmapable */
318 size = omap_gem_mmap_size(obj);
319 ret = _drm_gem_create_mmap_offset_size(obj, size);
320 if (ret) {
321 dev_err(dev->dev, "could not allocate mmap offset\n");
322 return 0;
Rob Clarkcd5351f2011-11-12 12:09:40 -0600323 }
324
David Herrmann0de23972013-07-24 21:07:52 +0200325 return drm_vma_node_offset_addr(&obj->vma_node);
Rob Clarkcd5351f2011-11-12 12:09:40 -0600326}
327
Rob Clarkc5b12472012-01-18 18:33:02 -0600328uint64_t omap_gem_mmap_offset(struct drm_gem_object *obj)
329{
330 uint64_t offset;
331 mutex_lock(&obj->dev->struct_mutex);
332 offset = mmap_offset(obj);
333 mutex_unlock(&obj->dev->struct_mutex);
334 return offset;
335}
336
Rob Clarkf7f9f452011-12-05 19:19:22 -0600337/** get mmap size */
338size_t omap_gem_mmap_size(struct drm_gem_object *obj)
339{
340 struct omap_gem_object *omap_obj = to_omap_bo(obj);
341 size_t size = obj->size;
342
343 if (omap_obj->flags & OMAP_BO_TILED) {
344 /* for tiled buffers, the virtual size has stride rounded up
345 * to 4kb.. (to hide the fact that row n+1 might start 16kb or
346 * 32kb later!). But we don't back the entire buffer with
347 * pages, only the valid picture part.. so need to adjust for
348 * this in the size used to mmap and generate mmap offset
349 */
350 size = tiler_vsize(gem2fmt(omap_obj->flags),
351 omap_obj->width, omap_obj->height);
352 }
353
354 return size;
355}
356
Rob Clark3c810c62012-08-15 15:18:01 -0500357/* get tiled size, returns -EINVAL if not tiled buffer */
358int omap_gem_tiled_size(struct drm_gem_object *obj, uint16_t *w, uint16_t *h)
359{
360 struct omap_gem_object *omap_obj = to_omap_bo(obj);
361 if (omap_obj->flags & OMAP_BO_TILED) {
362 *w = omap_obj->width;
363 *h = omap_obj->height;
364 return 0;
365 }
366 return -EINVAL;
367}
Rob Clarkf7f9f452011-12-05 19:19:22 -0600368
369/* Normal handling for the case of faulting in non-tiled buffers */
370static int fault_1d(struct drm_gem_object *obj,
371 struct vm_area_struct *vma, struct vm_fault *vmf)
372{
373 struct omap_gem_object *omap_obj = to_omap_bo(obj);
374 unsigned long pfn;
375 pgoff_t pgoff;
376
377 /* We don't use vmf->pgoff since that has the fake offset: */
378 pgoff = ((unsigned long)vmf->virtual_address -
379 vma->vm_start) >> PAGE_SHIFT;
380
381 if (omap_obj->pages) {
Rob Clark8b6b5692012-05-17 02:37:25 -0600382 omap_gem_cpu_sync(obj, pgoff);
Rob Clarkf7f9f452011-12-05 19:19:22 -0600383 pfn = page_to_pfn(omap_obj->pages[pgoff]);
384 } else {
385 BUG_ON(!(omap_obj->flags & OMAP_BO_DMA));
386 pfn = (omap_obj->paddr >> PAGE_SHIFT) + pgoff;
387 }
388
389 VERB("Inserting %p pfn %lx, pa %lx", vmf->virtual_address,
390 pfn, pfn << PAGE_SHIFT);
391
392 return vm_insert_mixed(vma, (unsigned long)vmf->virtual_address, pfn);
393}
394
395/* Special handling for the case of faulting in 2d tiled buffers */
396static int fault_2d(struct drm_gem_object *obj,
397 struct vm_area_struct *vma, struct vm_fault *vmf)
398{
399 struct omap_gem_object *omap_obj = to_omap_bo(obj);
400 struct usergart_entry *entry;
401 enum tiler_fmt fmt = gem2fmt(omap_obj->flags);
402 struct page *pages[64]; /* XXX is this too much to have on stack? */
403 unsigned long pfn;
404 pgoff_t pgoff, base_pgoff;
405 void __user *vaddr;
406 int i, ret, slots;
407
Rob Clarke5598952012-03-05 10:48:40 -0600408 /*
409 * Note the height of the slot is also equal to the number of pages
410 * that need to be mapped in to fill 4kb wide CPU page. If the slot
411 * height is 64, then 64 pages fill a 4kb wide by 64 row region.
Rob Clarkf7f9f452011-12-05 19:19:22 -0600412 */
Rob Clarke5598952012-03-05 10:48:40 -0600413 const int n = usergart[fmt].height;
414 const int n_shift = usergart[fmt].height_shift;
415
416 /*
417 * If buffer width in bytes > PAGE_SIZE then the virtual stride is
418 * rounded up to next multiple of PAGE_SIZE.. this need to be taken
419 * into account in some of the math, so figure out virtual stride
420 * in pages
421 */
422 const int m = 1 + ((omap_obj->width << fmt) / PAGE_SIZE);
Rob Clarkf7f9f452011-12-05 19:19:22 -0600423
424 /* We don't use vmf->pgoff since that has the fake offset: */
425 pgoff = ((unsigned long)vmf->virtual_address -
426 vma->vm_start) >> PAGE_SHIFT;
427
Rob Clarke5598952012-03-05 10:48:40 -0600428 /*
429 * Actual address we start mapping at is rounded down to previous slot
Rob Clarkf7f9f452011-12-05 19:19:22 -0600430 * boundary in the y direction:
431 */
Rob Clarke5598952012-03-05 10:48:40 -0600432 base_pgoff = round_down(pgoff, m << n_shift);
Rob Clarkf7f9f452011-12-05 19:19:22 -0600433
Rob Clarke5598952012-03-05 10:48:40 -0600434 /* figure out buffer width in slots */
Rob Clarkf7f9f452011-12-05 19:19:22 -0600435 slots = omap_obj->width >> usergart[fmt].slot_shift;
436
Rob Clarke5598952012-03-05 10:48:40 -0600437 vaddr = vmf->virtual_address - ((pgoff - base_pgoff) << PAGE_SHIFT);
438
439 entry = &usergart[fmt].entry[usergart[fmt].last];
440
Rob Clarkf7f9f452011-12-05 19:19:22 -0600441 /* evict previous buffer using this usergart entry, if any: */
442 if (entry->obj)
443 evict_entry(entry->obj, fmt, entry);
444
445 entry->obj = obj;
446 entry->obj_pgoff = base_pgoff;
447
Rob Clarke5598952012-03-05 10:48:40 -0600448 /* now convert base_pgoff to phys offset from virt offset: */
449 base_pgoff = (base_pgoff >> n_shift) * slots;
Rob Clarkf7f9f452011-12-05 19:19:22 -0600450
Rob Clarke5598952012-03-05 10:48:40 -0600451 /* for wider-than 4k.. figure out which part of the slot-row we want: */
452 if (m > 1) {
453 int off = pgoff % m;
454 entry->obj_pgoff += off;
455 base_pgoff /= m;
456 slots = min(slots - (off << n_shift), n);
457 base_pgoff += off << n_shift;
458 vaddr += off << PAGE_SHIFT;
459 }
460
461 /*
462 * Map in pages. Beyond the valid pixel part of the buffer, we set
463 * pages[i] to NULL to get a dummy page mapped in.. if someone
464 * reads/writes it they will get random/undefined content, but at
465 * least it won't be corrupting whatever other random page used to
466 * be mapped in, or other undefined behavior.
Rob Clarkf7f9f452011-12-05 19:19:22 -0600467 */
468 memcpy(pages, &omap_obj->pages[base_pgoff],
469 sizeof(struct page *) * slots);
470 memset(pages + slots, 0,
Rob Clarke5598952012-03-05 10:48:40 -0600471 sizeof(struct page *) * (n - slots));
Rob Clarkf7f9f452011-12-05 19:19:22 -0600472
Rob Clarka6a91822011-12-09 23:26:08 -0600473 ret = tiler_pin(entry->block, pages, ARRAY_SIZE(pages), 0, true);
Rob Clarkf7f9f452011-12-05 19:19:22 -0600474 if (ret) {
475 dev_err(obj->dev->dev, "failed to pin: %d\n", ret);
476 return ret;
477 }
478
Rob Clarkf7f9f452011-12-05 19:19:22 -0600479 pfn = entry->paddr >> PAGE_SHIFT;
480
481 VERB("Inserting %p pfn %lx, pa %lx", vmf->virtual_address,
482 pfn, pfn << PAGE_SHIFT);
483
Rob Clarke5598952012-03-05 10:48:40 -0600484 for (i = n; i > 0; i--) {
Rob Clarkf7f9f452011-12-05 19:19:22 -0600485 vm_insert_mixed(vma, (unsigned long)vaddr, pfn);
486 pfn += usergart[fmt].stride_pfn;
Rob Clarke5598952012-03-05 10:48:40 -0600487 vaddr += PAGE_SIZE * m;
Rob Clarkf7f9f452011-12-05 19:19:22 -0600488 }
489
490 /* simple round-robin: */
491 usergart[fmt].last = (usergart[fmt].last + 1) % NUM_USERGART_ENTRIES;
492
493 return 0;
494}
495
Rob Clarkcd5351f2011-11-12 12:09:40 -0600496/**
497 * omap_gem_fault - pagefault handler for GEM objects
498 * @vma: the VMA of the GEM object
499 * @vmf: fault detail
500 *
501 * Invoked when a fault occurs on an mmap of a GEM managed area. GEM
502 * does most of the work for us including the actual map/unmap calls
503 * but we need to do the actual page work.
504 *
505 * The VMA was set up by GEM. In doing so it also ensured that the
506 * vma->vm_private_data points to the GEM object that is backing this
507 * mapping.
508 */
509int omap_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
510{
511 struct drm_gem_object *obj = vma->vm_private_data;
512 struct omap_gem_object *omap_obj = to_omap_bo(obj);
513 struct drm_device *dev = obj->dev;
514 struct page **pages;
Rob Clarkcd5351f2011-11-12 12:09:40 -0600515 int ret;
516
517 /* Make sure we don't parallel update on a fault, nor move or remove
518 * something from beneath our feet
519 */
520 mutex_lock(&dev->struct_mutex);
521
522 /* if a shmem backed object, make sure we have pages attached now */
523 ret = get_pages(obj, &pages);
YAMANE Toshiakiae053032012-11-14 19:33:17 +0900524 if (ret)
Rob Clarkcd5351f2011-11-12 12:09:40 -0600525 goto fail;
Rob Clarkcd5351f2011-11-12 12:09:40 -0600526
527 /* where should we do corresponding put_pages().. we are mapping
528 * the original page, rather than thru a GART, so we can't rely
529 * on eviction to trigger this. But munmap() or all mappings should
530 * probably trigger put_pages()?
531 */
532
Rob Clarkf7f9f452011-12-05 19:19:22 -0600533 if (omap_obj->flags & OMAP_BO_TILED)
534 ret = fault_2d(obj, vma, vmf);
535 else
536 ret = fault_1d(obj, vma, vmf);
Rob Clarkcd5351f2011-11-12 12:09:40 -0600537
Rob Clarkcd5351f2011-11-12 12:09:40 -0600538
539fail:
540 mutex_unlock(&dev->struct_mutex);
541 switch (ret) {
542 case 0:
543 case -ERESTARTSYS:
544 case -EINTR:
545 return VM_FAULT_NOPAGE;
546 case -ENOMEM:
547 return VM_FAULT_OOM;
548 default:
549 return VM_FAULT_SIGBUS;
550 }
551}
552
553/** We override mainly to fix up some of the vm mapping flags.. */
554int omap_gem_mmap(struct file *filp, struct vm_area_struct *vma)
555{
Rob Clarkcd5351f2011-11-12 12:09:40 -0600556 int ret;
557
558 ret = drm_gem_mmap(filp, vma);
559 if (ret) {
560 DBG("mmap failed: %d", ret);
561 return ret;
562 }
563
Rob Clark8b6b5692012-05-17 02:37:25 -0600564 return omap_gem_mmap_obj(vma->vm_private_data, vma);
565}
566
567int omap_gem_mmap_obj(struct drm_gem_object *obj,
568 struct vm_area_struct *vma)
569{
570 struct omap_gem_object *omap_obj = to_omap_bo(obj);
Rob Clarkcd5351f2011-11-12 12:09:40 -0600571
572 vma->vm_flags &= ~VM_PFNMAP;
573 vma->vm_flags |= VM_MIXEDMAP;
574
575 if (omap_obj->flags & OMAP_BO_WC) {
576 vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags));
577 } else if (omap_obj->flags & OMAP_BO_UNCACHED) {
578 vma->vm_page_prot = pgprot_noncached(vm_get_page_prot(vma->vm_flags));
579 } else {
Rob Clark8b6b5692012-05-17 02:37:25 -0600580 /*
581 * We do have some private objects, at least for scanout buffers
582 * on hardware without DMM/TILER. But these are allocated write-
583 * combine
584 */
585 if (WARN_ON(!obj->filp))
586 return -EINVAL;
587
588 /*
589 * Shunt off cached objs to shmem file so they have their own
590 * address_space (so unmap_mapping_range does what we want,
591 * in particular in the case of mmap'd dmabufs)
592 */
593 fput(vma->vm_file);
Rob Clark8b6b5692012-05-17 02:37:25 -0600594 vma->vm_pgoff = 0;
Al Virocb0942b2012-08-27 14:48:26 -0400595 vma->vm_file = get_file(obj->filp);
Rob Clark8b6b5692012-05-17 02:37:25 -0600596
Rob Clarkcd5351f2011-11-12 12:09:40 -0600597 vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
598 }
599
Rob Clark8b6b5692012-05-17 02:37:25 -0600600 return 0;
Rob Clarkcd5351f2011-11-12 12:09:40 -0600601}
602
Rob Clark8b6b5692012-05-17 02:37:25 -0600603
Rob Clarkcd5351f2011-11-12 12:09:40 -0600604/**
605 * omap_gem_dumb_create - create a dumb buffer
606 * @drm_file: our client file
607 * @dev: our device
608 * @args: the requested arguments copied from userspace
609 *
610 * Allocate a buffer suitable for use for a frame buffer of the
611 * form described by user space. Give userspace a handle by which
612 * to reference it.
613 */
614int omap_gem_dumb_create(struct drm_file *file, struct drm_device *dev,
615 struct drm_mode_create_dumb *args)
616{
617 union omap_gem_size gsize;
618
619 /* in case someone tries to feed us a completely bogus stride: */
620 args->pitch = align_pitch(args->pitch, args->width, args->bpp);
621 args->size = PAGE_ALIGN(args->pitch * args->height);
622
623 gsize = (union omap_gem_size){
624 .bytes = args->size,
625 };
626
627 return omap_gem_new_handle(dev, file, gsize,
628 OMAP_BO_SCANOUT | OMAP_BO_WC, &args->handle);
629}
630
631/**
632 * omap_gem_dumb_destroy - destroy a dumb buffer
633 * @file: client file
634 * @dev: our DRM device
635 * @handle: the object handle
636 *
637 * Destroy a handle that was created via omap_gem_dumb_create.
638 */
639int omap_gem_dumb_destroy(struct drm_file *file, struct drm_device *dev,
640 uint32_t handle)
641{
642 /* No special work needed, drop the reference and see what falls out */
643 return drm_gem_handle_delete(file, handle);
644}
645
646/**
647 * omap_gem_dumb_map - buffer mapping for dumb interface
648 * @file: our drm client file
649 * @dev: drm device
650 * @handle: GEM handle to the object (from dumb_create)
651 *
652 * Do the necessary setup to allow the mapping of the frame buffer
653 * into user memory. We don't have to do much here at the moment.
654 */
655int omap_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev,
656 uint32_t handle, uint64_t *offset)
657{
658 struct drm_gem_object *obj;
659 int ret = 0;
660
Rob Clarkcd5351f2011-11-12 12:09:40 -0600661 /* GEM does all our handle to object mapping */
662 obj = drm_gem_object_lookup(dev, file, handle);
663 if (obj == NULL) {
664 ret = -ENOENT;
665 goto fail;
666 }
667
668 *offset = omap_gem_mmap_offset(obj);
669
670 drm_gem_object_unreference_unlocked(obj);
671
672fail:
Rob Clarkcd5351f2011-11-12 12:09:40 -0600673 return ret;
674}
675
Rob Clarka6a91822011-12-09 23:26:08 -0600676/* Set scrolling position. This allows us to implement fast scrolling
677 * for console.
Rob Clark9b55b952012-03-05 10:48:33 -0600678 *
679 * Call only from non-atomic contexts.
Rob Clarka6a91822011-12-09 23:26:08 -0600680 */
681int omap_gem_roll(struct drm_gem_object *obj, uint32_t roll)
682{
683 struct omap_gem_object *omap_obj = to_omap_bo(obj);
684 uint32_t npages = obj->size >> PAGE_SHIFT;
685 int ret = 0;
686
687 if (roll > npages) {
688 dev_err(obj->dev->dev, "invalid roll: %d\n", roll);
689 return -EINVAL;
690 }
691
Rob Clarka6a91822011-12-09 23:26:08 -0600692 omap_obj->roll = roll;
693
Rob Clarkaf695922011-12-16 11:34:34 -0600694 mutex_lock(&obj->dev->struct_mutex);
695
Rob Clarka6a91822011-12-09 23:26:08 -0600696 /* if we aren't mapped yet, we don't need to do anything */
697 if (omap_obj->block) {
698 struct page **pages;
699 ret = get_pages(obj, &pages);
700 if (ret)
701 goto fail;
702 ret = tiler_pin(omap_obj->block, pages, npages, roll, true);
703 if (ret)
704 dev_err(obj->dev->dev, "could not repin: %d\n", ret);
705 }
706
707fail:
708 mutex_unlock(&obj->dev->struct_mutex);
709
710 return ret;
711}
712
Rob Clark8b6b5692012-05-17 02:37:25 -0600713/* Sync the buffer for CPU access.. note pages should already be
714 * attached, ie. omap_gem_get_pages()
715 */
716void omap_gem_cpu_sync(struct drm_gem_object *obj, int pgoff)
717{
718 struct drm_device *dev = obj->dev;
719 struct omap_gem_object *omap_obj = to_omap_bo(obj);
720
721 if (is_cached_coherent(obj) && omap_obj->addrs[pgoff]) {
722 dma_unmap_page(dev->dev, omap_obj->addrs[pgoff],
723 PAGE_SIZE, DMA_BIDIRECTIONAL);
724 omap_obj->addrs[pgoff] = 0;
725 }
726}
727
728/* sync the buffer for DMA access */
729void omap_gem_dma_sync(struct drm_gem_object *obj,
730 enum dma_data_direction dir)
731{
732 struct drm_device *dev = obj->dev;
733 struct omap_gem_object *omap_obj = to_omap_bo(obj);
734
735 if (is_cached_coherent(obj)) {
736 int i, npages = obj->size >> PAGE_SHIFT;
737 struct page **pages = omap_obj->pages;
738 bool dirty = false;
739
740 for (i = 0; i < npages; i++) {
741 if (!omap_obj->addrs[i]) {
742 omap_obj->addrs[i] = dma_map_page(dev->dev, pages[i], 0,
743 PAGE_SIZE, DMA_BIDIRECTIONAL);
744 dirty = true;
745 }
746 }
747
748 if (dirty) {
749 unmap_mapping_range(obj->filp->f_mapping, 0,
750 omap_gem_mmap_size(obj), 1);
751 }
752 }
753}
754
Rob Clarkcd5351f2011-11-12 12:09:40 -0600755/* Get physical address for DMA.. if 'remap' is true, and the buffer is not
756 * already contiguous, remap it to pin in physically contiguous memory.. (ie.
757 * map in TILER)
758 */
759int omap_gem_get_paddr(struct drm_gem_object *obj,
760 dma_addr_t *paddr, bool remap)
761{
Rob Clarka6a91822011-12-09 23:26:08 -0600762 struct omap_drm_private *priv = obj->dev->dev_private;
Rob Clarkcd5351f2011-11-12 12:09:40 -0600763 struct omap_gem_object *omap_obj = to_omap_bo(obj);
764 int ret = 0;
765
Rob Clarkf7f9f452011-12-05 19:19:22 -0600766 mutex_lock(&obj->dev->struct_mutex);
767
Rob Clarka6a91822011-12-09 23:26:08 -0600768 if (remap && is_shmem(obj) && priv->has_dmm) {
Rob Clarkf7f9f452011-12-05 19:19:22 -0600769 if (omap_obj->paddr_cnt == 0) {
770 struct page **pages;
Rob Clarka6a91822011-12-09 23:26:08 -0600771 uint32_t npages = obj->size >> PAGE_SHIFT;
Rob Clarkf7f9f452011-12-05 19:19:22 -0600772 enum tiler_fmt fmt = gem2fmt(omap_obj->flags);
773 struct tiler_block *block;
Rob Clarka6a91822011-12-09 23:26:08 -0600774
Rob Clarkf7f9f452011-12-05 19:19:22 -0600775 BUG_ON(omap_obj->block);
776
777 ret = get_pages(obj, &pages);
778 if (ret)
779 goto fail;
780
Rob Clarkf7f9f452011-12-05 19:19:22 -0600781 if (omap_obj->flags & OMAP_BO_TILED) {
782 block = tiler_reserve_2d(fmt,
783 omap_obj->width,
784 omap_obj->height, 0);
785 } else {
786 block = tiler_reserve_1d(obj->size);
787 }
788
789 if (IS_ERR(block)) {
790 ret = PTR_ERR(block);
791 dev_err(obj->dev->dev,
792 "could not remap: %d (%d)\n", ret, fmt);
793 goto fail;
794 }
795
796 /* TODO: enable async refill.. */
Rob Clarka6a91822011-12-09 23:26:08 -0600797 ret = tiler_pin(block, pages, npages,
798 omap_obj->roll, true);
Rob Clarkf7f9f452011-12-05 19:19:22 -0600799 if (ret) {
800 tiler_release(block);
801 dev_err(obj->dev->dev,
802 "could not pin: %d\n", ret);
803 goto fail;
804 }
805
806 omap_obj->paddr = tiler_ssptr(block);
807 omap_obj->block = block;
808
809 DBG("got paddr: %08x", omap_obj->paddr);
810 }
811
812 omap_obj->paddr_cnt++;
813
814 *paddr = omap_obj->paddr;
815 } else if (omap_obj->flags & OMAP_BO_DMA) {
816 *paddr = omap_obj->paddr;
817 } else {
818 ret = -EINVAL;
Rob Clark8b6b5692012-05-17 02:37:25 -0600819 goto fail;
Rob Clarkcd5351f2011-11-12 12:09:40 -0600820 }
821
Rob Clarkf7f9f452011-12-05 19:19:22 -0600822fail:
823 mutex_unlock(&obj->dev->struct_mutex);
Rob Clarkcd5351f2011-11-12 12:09:40 -0600824
825 return ret;
826}
827
828/* Release physical address, when DMA is no longer being performed.. this
829 * could potentially unpin and unmap buffers from TILER
830 */
831int omap_gem_put_paddr(struct drm_gem_object *obj)
832{
Rob Clarkf7f9f452011-12-05 19:19:22 -0600833 struct omap_gem_object *omap_obj = to_omap_bo(obj);
834 int ret = 0;
835
836 mutex_lock(&obj->dev->struct_mutex);
837 if (omap_obj->paddr_cnt > 0) {
838 omap_obj->paddr_cnt--;
839 if (omap_obj->paddr_cnt == 0) {
840 ret = tiler_unpin(omap_obj->block);
841 if (ret) {
842 dev_err(obj->dev->dev,
843 "could not unpin pages: %d\n", ret);
844 goto fail;
845 }
846 ret = tiler_release(omap_obj->block);
847 if (ret) {
848 dev_err(obj->dev->dev,
849 "could not release unmap: %d\n", ret);
850 }
851 omap_obj->block = NULL;
852 }
853 }
854fail:
855 mutex_unlock(&obj->dev->struct_mutex);
856 return ret;
Rob Clarkcd5351f2011-11-12 12:09:40 -0600857}
858
Rob Clark3c810c62012-08-15 15:18:01 -0500859/* Get rotated scanout address (only valid if already pinned), at the
860 * specified orientation and x,y offset from top-left corner of buffer
861 * (only valid for tiled 2d buffers)
862 */
863int omap_gem_rotated_paddr(struct drm_gem_object *obj, uint32_t orient,
864 int x, int y, dma_addr_t *paddr)
865{
866 struct omap_gem_object *omap_obj = to_omap_bo(obj);
867 int ret = -EINVAL;
868
869 mutex_lock(&obj->dev->struct_mutex);
870 if ((omap_obj->paddr_cnt > 0) && omap_obj->block &&
871 (omap_obj->flags & OMAP_BO_TILED)) {
872 *paddr = tiler_tsptr(omap_obj->block, orient, x, y);
873 ret = 0;
874 }
875 mutex_unlock(&obj->dev->struct_mutex);
876 return ret;
877}
878
879/* Get tiler stride for the buffer (only valid for 2d tiled buffers) */
880int omap_gem_tiled_stride(struct drm_gem_object *obj, uint32_t orient)
881{
882 struct omap_gem_object *omap_obj = to_omap_bo(obj);
883 int ret = -EINVAL;
884 if (omap_obj->flags & OMAP_BO_TILED)
885 ret = tiler_stride(gem2fmt(omap_obj->flags), orient);
886 return ret;
887}
888
Rob Clarkcd5351f2011-11-12 12:09:40 -0600889/* acquire pages when needed (for example, for DMA where physically
890 * contiguous buffer is not required
891 */
892static int get_pages(struct drm_gem_object *obj, struct page ***pages)
893{
894 struct omap_gem_object *omap_obj = to_omap_bo(obj);
895 int ret = 0;
896
897 if (is_shmem(obj) && !omap_obj->pages) {
898 ret = omap_gem_attach_pages(obj);
899 if (ret) {
900 dev_err(obj->dev->dev, "could not attach pages\n");
901 return ret;
902 }
903 }
904
905 /* TODO: even phys-contig.. we should have a list of pages? */
906 *pages = omap_obj->pages;
907
908 return 0;
909}
910
Rob Clark6ad11bc2012-04-10 13:19:55 -0500911/* if !remap, and we don't have pages backing, then fail, rather than
912 * increasing the pin count (which we don't really do yet anyways,
913 * because we don't support swapping pages back out). And 'remap'
914 * might not be quite the right name, but I wanted to keep it working
915 * similarly to omap_gem_get_paddr(). Note though that mutex is not
916 * aquired if !remap (because this can be called in atomic ctxt),
917 * but probably omap_gem_get_paddr() should be changed to work in the
918 * same way. If !remap, a matching omap_gem_put_pages() call is not
919 * required (and should not be made).
920 */
921int omap_gem_get_pages(struct drm_gem_object *obj, struct page ***pages,
922 bool remap)
Rob Clarkcd5351f2011-11-12 12:09:40 -0600923{
924 int ret;
Rob Clark6ad11bc2012-04-10 13:19:55 -0500925 if (!remap) {
926 struct omap_gem_object *omap_obj = to_omap_bo(obj);
927 if (!omap_obj->pages)
928 return -ENOMEM;
929 *pages = omap_obj->pages;
930 return 0;
931 }
Rob Clarkcd5351f2011-11-12 12:09:40 -0600932 mutex_lock(&obj->dev->struct_mutex);
933 ret = get_pages(obj, pages);
934 mutex_unlock(&obj->dev->struct_mutex);
935 return ret;
936}
937
938/* release pages when DMA no longer being performed */
939int omap_gem_put_pages(struct drm_gem_object *obj)
940{
941 /* do something here if we dynamically attach/detach pages.. at
942 * least they would no longer need to be pinned if everyone has
943 * released the pages..
944 */
945 return 0;
946}
947
Rob Clarkf7f9f452011-12-05 19:19:22 -0600948/* Get kernel virtual address for CPU access.. this more or less only
949 * exists for omap_fbdev. This should be called with struct_mutex
950 * held.
Rob Clarkcd5351f2011-11-12 12:09:40 -0600951 */
952void *omap_gem_vaddr(struct drm_gem_object *obj)
953{
954 struct omap_gem_object *omap_obj = to_omap_bo(obj);
YAMANE Toshiaki696e3ca2012-11-14 19:33:43 +0900955 WARN_ON(!mutex_is_locked(&obj->dev->struct_mutex));
Rob Clarkf7f9f452011-12-05 19:19:22 -0600956 if (!omap_obj->vaddr) {
957 struct page **pages;
958 int ret = get_pages(obj, &pages);
959 if (ret)
960 return ERR_PTR(ret);
961 omap_obj->vaddr = vmap(pages, obj->size >> PAGE_SHIFT,
962 VM_MAP, pgprot_writecombine(PAGE_KERNEL));
963 }
Rob Clarkcd5351f2011-11-12 12:09:40 -0600964 return omap_obj->vaddr;
965}
966
Andy Grosse78edba2012-12-19 14:53:37 -0600967#ifdef CONFIG_PM
968/* re-pin objects in DMM in resume path: */
969int omap_gem_resume(struct device *dev)
970{
971 struct drm_device *drm_dev = dev_get_drvdata(dev);
972 struct omap_drm_private *priv = drm_dev->dev_private;
973 struct omap_gem_object *omap_obj;
974 int ret = 0;
975
976 list_for_each_entry(omap_obj, &priv->obj_list, mm_list) {
977 if (omap_obj->block) {
978 struct drm_gem_object *obj = &omap_obj->base;
979 uint32_t npages = obj->size >> PAGE_SHIFT;
980 WARN_ON(!omap_obj->pages); /* this can't happen */
981 ret = tiler_pin(omap_obj->block,
982 omap_obj->pages, npages,
983 omap_obj->roll, true);
984 if (ret) {
985 dev_err(dev, "could not repin: %d\n", ret);
986 return ret;
987 }
988 }
989 }
990
991 return 0;
992}
993#endif
994
Rob Clarkf6b60362012-03-05 10:48:36 -0600995#ifdef CONFIG_DEBUG_FS
996void omap_gem_describe(struct drm_gem_object *obj, struct seq_file *m)
997{
998 struct drm_device *dev = obj->dev;
999 struct omap_gem_object *omap_obj = to_omap_bo(obj);
David Herrmann0de23972013-07-24 21:07:52 +02001000 uint64_t off;
Rob Clarkf6b60362012-03-05 10:48:36 -06001001
YAMANE Toshiaki696e3ca2012-11-14 19:33:43 +09001002 WARN_ON(!mutex_is_locked(&dev->struct_mutex));
Rob Clarkf6b60362012-03-05 10:48:36 -06001003
David Herrmann0de23972013-07-24 21:07:52 +02001004 off = drm_vma_node_start(&obj->vma_node);
Rob Clarkf6b60362012-03-05 10:48:36 -06001005
1006 seq_printf(m, "%08x: %2d (%2d) %08llx %08Zx (%2d) %p %4d",
1007 omap_obj->flags, obj->name, obj->refcount.refcount.counter,
1008 off, omap_obj->paddr, omap_obj->paddr_cnt,
1009 omap_obj->vaddr, omap_obj->roll);
1010
1011 if (omap_obj->flags & OMAP_BO_TILED) {
1012 seq_printf(m, " %dx%d", omap_obj->width, omap_obj->height);
1013 if (omap_obj->block) {
1014 struct tcm_area *area = &omap_obj->block->area;
1015 seq_printf(m, " (%dx%d, %dx%d)",
1016 area->p0.x, area->p0.y,
1017 area->p1.x, area->p1.y);
1018 }
1019 } else {
1020 seq_printf(m, " %d", obj->size);
1021 }
1022
1023 seq_printf(m, "\n");
1024}
1025
1026void omap_gem_describe_objects(struct list_head *list, struct seq_file *m)
1027{
1028 struct omap_gem_object *omap_obj;
1029 int count = 0;
1030 size_t size = 0;
1031
1032 list_for_each_entry(omap_obj, list, mm_list) {
1033 struct drm_gem_object *obj = &omap_obj->base;
1034 seq_printf(m, " ");
1035 omap_gem_describe(obj, m);
1036 count++;
1037 size += obj->size;
1038 }
1039
1040 seq_printf(m, "Total %d objects, %zu bytes\n", count, size);
1041}
1042#endif
1043
Rob Clarkcd5351f2011-11-12 12:09:40 -06001044/* Buffer Synchronization:
1045 */
1046
1047struct omap_gem_sync_waiter {
1048 struct list_head list;
1049 struct omap_gem_object *omap_obj;
1050 enum omap_gem_op op;
1051 uint32_t read_target, write_target;
1052 /* notify called w/ sync_lock held */
1053 void (*notify)(void *arg);
1054 void *arg;
1055};
1056
1057/* list of omap_gem_sync_waiter.. the notify fxn gets called back when
1058 * the read and/or write target count is achieved which can call a user
1059 * callback (ex. to kick 3d and/or 2d), wakeup blocked task (prep for
1060 * cpu access), etc.
1061 */
1062static LIST_HEAD(waiters);
1063
1064static inline bool is_waiting(struct omap_gem_sync_waiter *waiter)
1065{
1066 struct omap_gem_object *omap_obj = waiter->omap_obj;
1067 if ((waiter->op & OMAP_GEM_READ) &&
1068 (omap_obj->sync->read_complete < waiter->read_target))
1069 return true;
1070 if ((waiter->op & OMAP_GEM_WRITE) &&
1071 (omap_obj->sync->write_complete < waiter->write_target))
1072 return true;
1073 return false;
1074}
1075
1076/* macro for sync debug.. */
1077#define SYNCDBG 0
1078#define SYNC(fmt, ...) do { if (SYNCDBG) \
1079 printk(KERN_ERR "%s:%d: "fmt"\n", \
1080 __func__, __LINE__, ##__VA_ARGS__); \
1081 } while (0)
1082
1083
1084static void sync_op_update(void)
1085{
1086 struct omap_gem_sync_waiter *waiter, *n;
1087 list_for_each_entry_safe(waiter, n, &waiters, list) {
1088 if (!is_waiting(waiter)) {
1089 list_del(&waiter->list);
1090 SYNC("notify: %p", waiter);
1091 waiter->notify(waiter->arg);
1092 kfree(waiter);
1093 }
1094 }
1095}
1096
1097static inline int sync_op(struct drm_gem_object *obj,
1098 enum omap_gem_op op, bool start)
1099{
1100 struct omap_gem_object *omap_obj = to_omap_bo(obj);
1101 int ret = 0;
1102
1103 spin_lock(&sync_lock);
1104
1105 if (!omap_obj->sync) {
1106 omap_obj->sync = kzalloc(sizeof(*omap_obj->sync), GFP_ATOMIC);
1107 if (!omap_obj->sync) {
1108 ret = -ENOMEM;
1109 goto unlock;
1110 }
1111 }
1112
1113 if (start) {
1114 if (op & OMAP_GEM_READ)
1115 omap_obj->sync->read_pending++;
1116 if (op & OMAP_GEM_WRITE)
1117 omap_obj->sync->write_pending++;
1118 } else {
1119 if (op & OMAP_GEM_READ)
1120 omap_obj->sync->read_complete++;
1121 if (op & OMAP_GEM_WRITE)
1122 omap_obj->sync->write_complete++;
1123 sync_op_update();
1124 }
1125
1126unlock:
1127 spin_unlock(&sync_lock);
1128
1129 return ret;
1130}
1131
1132/* it is a bit lame to handle updates in this sort of polling way, but
1133 * in case of PVR, the GPU can directly update read/write complete
1134 * values, and not really tell us which ones it updated.. this also
1135 * means that sync_lock is not quite sufficient. So we'll need to
1136 * do something a bit better when it comes time to add support for
1137 * separate 2d hw..
1138 */
1139void omap_gem_op_update(void)
1140{
1141 spin_lock(&sync_lock);
1142 sync_op_update();
1143 spin_unlock(&sync_lock);
1144}
1145
1146/* mark the start of read and/or write operation */
1147int omap_gem_op_start(struct drm_gem_object *obj, enum omap_gem_op op)
1148{
1149 return sync_op(obj, op, true);
1150}
1151
1152int omap_gem_op_finish(struct drm_gem_object *obj, enum omap_gem_op op)
1153{
1154 return sync_op(obj, op, false);
1155}
1156
1157static DECLARE_WAIT_QUEUE_HEAD(sync_event);
1158
1159static void sync_notify(void *arg)
1160{
1161 struct task_struct **waiter_task = arg;
1162 *waiter_task = NULL;
1163 wake_up_all(&sync_event);
1164}
1165
1166int omap_gem_op_sync(struct drm_gem_object *obj, enum omap_gem_op op)
1167{
1168 struct omap_gem_object *omap_obj = to_omap_bo(obj);
1169 int ret = 0;
1170 if (omap_obj->sync) {
1171 struct task_struct *waiter_task = current;
1172 struct omap_gem_sync_waiter *waiter =
1173 kzalloc(sizeof(*waiter), GFP_KERNEL);
1174
YAMANE Toshiakiae053032012-11-14 19:33:17 +09001175 if (!waiter)
Rob Clarkcd5351f2011-11-12 12:09:40 -06001176 return -ENOMEM;
Rob Clarkcd5351f2011-11-12 12:09:40 -06001177
1178 waiter->omap_obj = omap_obj;
1179 waiter->op = op;
1180 waiter->read_target = omap_obj->sync->read_pending;
1181 waiter->write_target = omap_obj->sync->write_pending;
1182 waiter->notify = sync_notify;
1183 waiter->arg = &waiter_task;
1184
1185 spin_lock(&sync_lock);
1186 if (is_waiting(waiter)) {
1187 SYNC("waited: %p", waiter);
1188 list_add_tail(&waiter->list, &waiters);
1189 spin_unlock(&sync_lock);
1190 ret = wait_event_interruptible(sync_event,
1191 (waiter_task == NULL));
1192 spin_lock(&sync_lock);
1193 if (waiter_task) {
1194 SYNC("interrupted: %p", waiter);
1195 /* we were interrupted */
1196 list_del(&waiter->list);
1197 waiter_task = NULL;
1198 } else {
1199 /* freed in sync_op_update() */
1200 waiter = NULL;
1201 }
1202 }
1203 spin_unlock(&sync_lock);
1204
YAMANE Toshiakiae053032012-11-14 19:33:17 +09001205 if (waiter)
Rob Clarkcd5351f2011-11-12 12:09:40 -06001206 kfree(waiter);
Rob Clarkcd5351f2011-11-12 12:09:40 -06001207 }
1208 return ret;
1209}
1210
1211/* call fxn(arg), either synchronously or asynchronously if the op
1212 * is currently blocked.. fxn() can be called from any context
1213 *
1214 * (TODO for now fxn is called back from whichever context calls
1215 * omap_gem_op_update().. but this could be better defined later
1216 * if needed)
1217 *
1218 * TODO more code in common w/ _sync()..
1219 */
1220int omap_gem_op_async(struct drm_gem_object *obj, enum omap_gem_op op,
1221 void (*fxn)(void *arg), void *arg)
1222{
1223 struct omap_gem_object *omap_obj = to_omap_bo(obj);
1224 if (omap_obj->sync) {
1225 struct omap_gem_sync_waiter *waiter =
1226 kzalloc(sizeof(*waiter), GFP_ATOMIC);
1227
YAMANE Toshiakiae053032012-11-14 19:33:17 +09001228 if (!waiter)
Rob Clarkcd5351f2011-11-12 12:09:40 -06001229 return -ENOMEM;
Rob Clarkcd5351f2011-11-12 12:09:40 -06001230
1231 waiter->omap_obj = omap_obj;
1232 waiter->op = op;
1233 waiter->read_target = omap_obj->sync->read_pending;
1234 waiter->write_target = omap_obj->sync->write_pending;
1235 waiter->notify = fxn;
1236 waiter->arg = arg;
1237
1238 spin_lock(&sync_lock);
1239 if (is_waiting(waiter)) {
1240 SYNC("waited: %p", waiter);
1241 list_add_tail(&waiter->list, &waiters);
1242 spin_unlock(&sync_lock);
1243 return 0;
1244 }
1245
1246 spin_unlock(&sync_lock);
1247 }
1248
1249 /* no waiting.. */
1250 fxn(arg);
1251
1252 return 0;
1253}
1254
1255/* special API so PVR can update the buffer to use a sync-object allocated
1256 * from it's sync-obj heap. Only used for a newly allocated (from PVR's
1257 * perspective) sync-object, so we overwrite the new syncobj w/ values
1258 * from the already allocated syncobj (if there is one)
1259 */
1260int omap_gem_set_sync_object(struct drm_gem_object *obj, void *syncobj)
1261{
1262 struct omap_gem_object *omap_obj = to_omap_bo(obj);
1263 int ret = 0;
1264
1265 spin_lock(&sync_lock);
1266
1267 if ((omap_obj->flags & OMAP_BO_EXT_SYNC) && !syncobj) {
1268 /* clearing a previously set syncobj */
Peter Huewee6200962013-01-26 00:40:13 +01001269 syncobj = kmemdup(omap_obj->sync, sizeof(*omap_obj->sync),
1270 GFP_ATOMIC);
Rob Clarkcd5351f2011-11-12 12:09:40 -06001271 if (!syncobj) {
1272 ret = -ENOMEM;
1273 goto unlock;
1274 }
Rob Clarkcd5351f2011-11-12 12:09:40 -06001275 omap_obj->flags &= ~OMAP_BO_EXT_SYNC;
1276 omap_obj->sync = syncobj;
1277 } else if (syncobj && !(omap_obj->flags & OMAP_BO_EXT_SYNC)) {
1278 /* replacing an existing syncobj */
1279 if (omap_obj->sync) {
1280 memcpy(syncobj, omap_obj->sync, sizeof(*omap_obj->sync));
1281 kfree(omap_obj->sync);
1282 }
1283 omap_obj->flags |= OMAP_BO_EXT_SYNC;
1284 omap_obj->sync = syncobj;
1285 }
1286
1287unlock:
1288 spin_unlock(&sync_lock);
1289 return ret;
1290}
1291
1292int omap_gem_init_object(struct drm_gem_object *obj)
1293{
1294 return -EINVAL; /* unused */
1295}
1296
1297/* don't call directly.. called from GEM core when it is time to actually
1298 * free the object..
1299 */
1300void omap_gem_free_object(struct drm_gem_object *obj)
1301{
1302 struct drm_device *dev = obj->dev;
1303 struct omap_gem_object *omap_obj = to_omap_bo(obj);
1304
Rob Clarkf7f9f452011-12-05 19:19:22 -06001305 evict(obj);
1306
Rob Clarkf6b60362012-03-05 10:48:36 -06001307 WARN_ON(!mutex_is_locked(&dev->struct_mutex));
1308
1309 list_del(&omap_obj->mm_list);
1310
David Herrmann0de23972013-07-24 21:07:52 +02001311 drm_gem_free_mmap_offset(obj);
Rob Clarkcd5351f2011-11-12 12:09:40 -06001312
Rob Clark9a0774e2012-01-16 12:51:17 -06001313 /* this means the object is still pinned.. which really should
1314 * not happen. I think..
1315 */
1316 WARN_ON(omap_obj->paddr_cnt > 0);
1317
Rob Clarkcd5351f2011-11-12 12:09:40 -06001318 /* don't free externally allocated backing memory */
1319 if (!(omap_obj->flags & OMAP_BO_EXT_MEM)) {
YAMANE Toshiakiae053032012-11-14 19:33:17 +09001320 if (omap_obj->pages)
Rob Clarkcd5351f2011-11-12 12:09:40 -06001321 omap_gem_detach_pages(obj);
YAMANE Toshiakiae053032012-11-14 19:33:17 +09001322
Rob Clarkcd5351f2011-11-12 12:09:40 -06001323 if (!is_shmem(obj)) {
1324 dma_free_writecombine(dev->dev, obj->size,
1325 omap_obj->vaddr, omap_obj->paddr);
Rob Clarkf7f9f452011-12-05 19:19:22 -06001326 } else if (omap_obj->vaddr) {
1327 vunmap(omap_obj->vaddr);
Rob Clarkcd5351f2011-11-12 12:09:40 -06001328 }
1329 }
1330
1331 /* don't free externally allocated syncobj */
YAMANE Toshiakiae053032012-11-14 19:33:17 +09001332 if (!(omap_obj->flags & OMAP_BO_EXT_SYNC))
Rob Clarkcd5351f2011-11-12 12:09:40 -06001333 kfree(omap_obj->sync);
Rob Clarkcd5351f2011-11-12 12:09:40 -06001334
1335 drm_gem_object_release(obj);
1336
1337 kfree(obj);
1338}
1339
1340/* convenience method to construct a GEM buffer object, and userspace handle */
1341int omap_gem_new_handle(struct drm_device *dev, struct drm_file *file,
1342 union omap_gem_size gsize, uint32_t flags, uint32_t *handle)
1343{
1344 struct drm_gem_object *obj;
1345 int ret;
1346
1347 obj = omap_gem_new(dev, gsize, flags);
1348 if (!obj)
1349 return -ENOMEM;
1350
1351 ret = drm_gem_handle_create(file, obj, handle);
1352 if (ret) {
1353 drm_gem_object_release(obj);
1354 kfree(obj); /* TODO isn't there a dtor to call? just copying i915 */
1355 return ret;
1356 }
1357
1358 /* drop reference from allocate - handle holds it now */
1359 drm_gem_object_unreference_unlocked(obj);
1360
1361 return 0;
1362}
1363
1364/* GEM buffer object constructor */
1365struct drm_gem_object *omap_gem_new(struct drm_device *dev,
1366 union omap_gem_size gsize, uint32_t flags)
1367{
Rob Clarka6a91822011-12-09 23:26:08 -06001368 struct omap_drm_private *priv = dev->dev_private;
Rob Clarkcd5351f2011-11-12 12:09:40 -06001369 struct omap_gem_object *omap_obj;
1370 struct drm_gem_object *obj = NULL;
1371 size_t size;
1372 int ret;
1373
1374 if (flags & OMAP_BO_TILED) {
Rob Clarkf7f9f452011-12-05 19:19:22 -06001375 if (!usergart) {
1376 dev_err(dev->dev, "Tiled buffers require DMM\n");
1377 goto fail;
1378 }
Rob Clarkcd5351f2011-11-12 12:09:40 -06001379
Rob Clarkf7f9f452011-12-05 19:19:22 -06001380 /* tiled buffers are always shmem paged backed.. when they are
1381 * scanned out, they are remapped into DMM/TILER
1382 */
1383 flags &= ~OMAP_BO_SCANOUT;
1384
1385 /* currently don't allow cached buffers.. there is some caching
1386 * stuff that needs to be handled better
1387 */
1388 flags &= ~(OMAP_BO_CACHED|OMAP_BO_UNCACHED);
1389 flags |= OMAP_BO_WC;
1390
1391 /* align dimensions to slot boundaries... */
1392 tiler_align(gem2fmt(flags),
1393 &gsize.tiled.width, &gsize.tiled.height);
1394
1395 /* ...and calculate size based on aligned dimensions */
1396 size = tiler_size(gem2fmt(flags),
1397 gsize.tiled.width, gsize.tiled.height);
1398 } else {
1399 size = PAGE_ALIGN(gsize.bytes);
1400 }
Rob Clarkcd5351f2011-11-12 12:09:40 -06001401
1402 omap_obj = kzalloc(sizeof(*omap_obj), GFP_KERNEL);
Joe Perches78110bb2013-02-11 09:41:29 -08001403 if (!omap_obj)
Rob Clarkcd5351f2011-11-12 12:09:40 -06001404 goto fail;
Rob Clarkcd5351f2011-11-12 12:09:40 -06001405
Rob Clarkf6b60362012-03-05 10:48:36 -06001406 list_add(&omap_obj->mm_list, &priv->obj_list);
1407
Rob Clarkcd5351f2011-11-12 12:09:40 -06001408 obj = &omap_obj->base;
1409
Rob Clarka6a91822011-12-09 23:26:08 -06001410 if ((flags & OMAP_BO_SCANOUT) && !priv->has_dmm) {
1411 /* attempt to allocate contiguous memory if we don't
1412 * have DMM for remappign discontiguous buffers
1413 */
Rob Clarkcd5351f2011-11-12 12:09:40 -06001414 omap_obj->vaddr = dma_alloc_writecombine(dev->dev, size,
1415 &omap_obj->paddr, GFP_KERNEL);
YAMANE Toshiakiae053032012-11-14 19:33:17 +09001416 if (omap_obj->vaddr)
Rob Clarkcd5351f2011-11-12 12:09:40 -06001417 flags |= OMAP_BO_DMA;
YAMANE Toshiakiae053032012-11-14 19:33:17 +09001418
Rob Clarkcd5351f2011-11-12 12:09:40 -06001419 }
1420
1421 omap_obj->flags = flags;
1422
Rob Clarkf7f9f452011-12-05 19:19:22 -06001423 if (flags & OMAP_BO_TILED) {
1424 omap_obj->width = gsize.tiled.width;
1425 omap_obj->height = gsize.tiled.height;
1426 }
1427
David Herrmann89c82332013-07-11 11:56:32 +02001428 ret = 0;
YAMANE Toshiakiae053032012-11-14 19:33:17 +09001429 if (flags & (OMAP_BO_DMA|OMAP_BO_EXT_MEM))
David Herrmann89c82332013-07-11 11:56:32 +02001430 drm_gem_private_object_init(dev, obj, size);
YAMANE Toshiakiae053032012-11-14 19:33:17 +09001431 else
Rob Clarkcd5351f2011-11-12 12:09:40 -06001432 ret = drm_gem_object_init(dev, obj, size);
Rob Clarkcd5351f2011-11-12 12:09:40 -06001433
YAMANE Toshiakiae053032012-11-14 19:33:17 +09001434 if (ret)
Rob Clarkcd5351f2011-11-12 12:09:40 -06001435 goto fail;
Rob Clarkcd5351f2011-11-12 12:09:40 -06001436
1437 return obj;
1438
1439fail:
YAMANE Toshiakiae053032012-11-14 19:33:17 +09001440 if (obj)
Rob Clarkcd5351f2011-11-12 12:09:40 -06001441 omap_gem_free_object(obj);
YAMANE Toshiakiae053032012-11-14 19:33:17 +09001442
Rob Clarkcd5351f2011-11-12 12:09:40 -06001443 return NULL;
1444}
Rob Clarkf7f9f452011-12-05 19:19:22 -06001445
1446/* init/cleanup.. if DMM is used, we need to set some stuff up.. */
1447void omap_gem_init(struct drm_device *dev)
1448{
Rob Clarka6a91822011-12-09 23:26:08 -06001449 struct omap_drm_private *priv = dev->dev_private;
Rob Clarkf7f9f452011-12-05 19:19:22 -06001450 const enum tiler_fmt fmts[] = {
1451 TILFMT_8BIT, TILFMT_16BIT, TILFMT_32BIT
1452 };
Andy Gross5c137792012-03-05 10:48:39 -06001453 int i, j;
Rob Clarkf7f9f452011-12-05 19:19:22 -06001454
Andy Grosse5e4e9b2012-10-17 00:30:03 -05001455 if (!dmm_is_available()) {
Rob Clarkf7f9f452011-12-05 19:19:22 -06001456 /* DMM only supported on OMAP4 and later, so this isn't fatal */
Andy Gross5c137792012-03-05 10:48:39 -06001457 dev_warn(dev->dev, "DMM not available, disable DMM support\n");
Rob Clarkf7f9f452011-12-05 19:19:22 -06001458 return;
1459 }
1460
Joe Perches78110bb2013-02-11 09:41:29 -08001461 usergart = kcalloc(3, sizeof(*usergart), GFP_KERNEL);
1462 if (!usergart)
Rob Clarkb3698392011-12-09 23:26:06 -06001463 return;
Rob Clarkf7f9f452011-12-05 19:19:22 -06001464
1465 /* reserve 4k aligned/wide regions for userspace mappings: */
1466 for (i = 0; i < ARRAY_SIZE(fmts); i++) {
1467 uint16_t h = 1, w = PAGE_SIZE >> i;
1468 tiler_align(fmts[i], &w, &h);
1469 /* note: since each region is 1 4kb page wide, and minimum
1470 * number of rows, the height ends up being the same as the
1471 * # of pages in the region
1472 */
1473 usergart[i].height = h;
1474 usergart[i].height_shift = ilog2(h);
Rob Clark3c810c62012-08-15 15:18:01 -05001475 usergart[i].stride_pfn = tiler_stride(fmts[i], 0) >> PAGE_SHIFT;
Rob Clarkf7f9f452011-12-05 19:19:22 -06001476 usergart[i].slot_shift = ilog2((PAGE_SIZE / h) >> i);
1477 for (j = 0; j < NUM_USERGART_ENTRIES; j++) {
1478 struct usergart_entry *entry = &usergart[i].entry[j];
1479 struct tiler_block *block =
1480 tiler_reserve_2d(fmts[i], w, h,
1481 PAGE_SIZE);
1482 if (IS_ERR(block)) {
1483 dev_err(dev->dev,
1484 "reserve failed: %d, %d, %ld\n",
1485 i, j, PTR_ERR(block));
1486 return;
1487 }
1488 entry->paddr = tiler_ssptr(block);
1489 entry->block = block;
1490
1491 DBG("%d:%d: %dx%d: paddr=%08x stride=%d", i, j, w, h,
1492 entry->paddr,
1493 usergart[i].stride_pfn << PAGE_SHIFT);
1494 }
1495 }
Rob Clarka6a91822011-12-09 23:26:08 -06001496
1497 priv->has_dmm = true;
Rob Clarkf7f9f452011-12-05 19:19:22 -06001498}
1499
1500void omap_gem_deinit(struct drm_device *dev)
1501{
1502 /* I believe we can rely on there being no more outstanding GEM
1503 * objects which could depend on usergart/dmm at this point.
1504 */
Rob Clarkf7f9f452011-12-05 19:19:22 -06001505 kfree(usergart);
1506}