2 * Copyright © 2008 Jérôme Glisse
3 * Copyright © 2010 Marek Olšák <maraeo@gmail.com>
6 * Permission is hereby granted, free of charge, to any person obtaining
7 * a copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
15 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
16 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
17 * NON-INFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT HOLDERS, AUTHORS
18 * AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
21 * USE OR OTHER DEALINGS IN THE SOFTWARE.
23 * The above copyright notice and this permission notice (including the
24 * next paragraph) shall be included in all copies or substantial portions
29 * Marek Olšák <maraeo@gmail.com>
31 * Based on work from libdrm_radeon by:
32 * Aapo Tahkola <aet@rasterburn.org>
33 * Nicolai Haehnle <prefect_@gmx.net>
34 * Jérôme Glisse <glisse@freedesktop.org>
38 This file replaces libdrm's radeon_cs_gem with our own implemention.
39 It's optimized specifically for r300g, but r600g could use it as well.
40 Reloc writes and space checking are faster and simpler than their
41 counterparts in libdrm (the time complexity of all the functions
42 is O(1) in nearly all scenarios, thanks to hashing).
46 cs_add_reloc(cs, buf, read_domain, write_domain) adds a new relocation and
47 also adds the size of 'buf' to the used_gart and used_vram winsys variables
48 based on the domains, which are simply or'd for the accounting purposes.
49 The adding is skipped if the reloc is already present in the list, but it
50 accounts any newly-referenced domains.
52 cs_validate is then called, which just checks:
53 used_vram/gart < vram/gart_size * 0.8
54 The 0.8 number allows for some memory fragmentation. If the validation
55 fails, the pipe driver flushes CS and tries do the validation again,
56 i.e. it validates only that one operation. If it fails again, it drops
57 the operation on the floor and prints some nasty message to stderr.
58 (done in the pipe driver)
60 cs_write_reloc(cs, buf) just writes a reloc that has been added using
61 cs_add_reloc. The read_domain and write_domain parameters have been removed,
62 because we already specify them in cs_add_reloc.
65 #include "radeon_drm_cs.h"
67 #include "util/u_memory.h"
74 #define RELOC_DWORDS (sizeof(struct drm_radeon_cs_reloc) / sizeof(uint32_t))
76 static boolean
radeon_init_cs_context(struct radeon_cs_context
*csc
, int fd
)
80 csc
->relocs_bo
= (struct radeon_bo
**)
81 CALLOC(1, csc
->nrelocs
* sizeof(struct radeon_bo
*));
82 if (!csc
->relocs_bo
) {
86 csc
->relocs
= (struct drm_radeon_cs_reloc
*)
87 CALLOC(1, csc
->nrelocs
* sizeof(struct drm_radeon_cs_reloc
));
93 csc
->chunks
[0].chunk_id
= RADEON_CHUNK_ID_IB
;
94 csc
->chunks
[0].length_dw
= 0;
95 csc
->chunks
[0].chunk_data
= (uint64_t)(uintptr_t)csc
->buf
;
96 csc
->chunks
[1].chunk_id
= RADEON_CHUNK_ID_RELOCS
;
97 csc
->chunks
[1].length_dw
= 0;
98 csc
->chunks
[1].chunk_data
= (uint64_t)(uintptr_t)csc
->relocs
;
100 csc
->chunk_array
[0] = (uint64_t)(uintptr_t)&csc
->chunks
[0];
101 csc
->chunk_array
[1] = (uint64_t)(uintptr_t)&csc
->chunks
[1];
103 csc
->cs
.num_chunks
= 2;
104 csc
->cs
.chunks
= (uint64_t)(uintptr_t)csc
->chunk_array
;
108 static void radeon_cs_context_cleanup(struct radeon_cs_context
*csc
)
112 for (i
= 0; i
< csc
->crelocs
; i
++) {
113 p_atomic_dec(&csc
->relocs_bo
[i
]->num_cs_references
);
114 radeon_bo_unref(csc
->relocs_bo
[i
]);
115 csc
->relocs_bo
[i
] = NULL
;
119 csc
->chunks
[0].length_dw
= 0;
120 csc
->chunks
[1].length_dw
= 0;
123 memset(csc
->is_handle_added
, 0, sizeof(csc
->is_handle_added
));
126 static void radeon_destroy_cs_context(struct radeon_cs_context
*csc
)
128 radeon_cs_context_cleanup(csc
);
129 FREE(csc
->relocs_bo
);
133 static struct r300_winsys_cs
*radeon_drm_cs_create(struct r300_winsys_screen
*rws
)
135 struct radeon_drm_winsys
*ws
= radeon_drm_winsys(rws
);
136 struct radeon_drm_cs
*cs
;
138 cs
= CALLOC_STRUCT(radeon_drm_cs
);
145 if (!radeon_init_cs_context(&cs
->csc1
, cs
->ws
->fd
)) {
149 if (!radeon_init_cs_context(&cs
->csc2
, cs
->ws
->fd
)) {
150 radeon_destroy_cs_context(&cs
->csc1
);
155 /* Set the first command buffer as current. */
158 cs
->base
.buf
= cs
->csc
->buf
;
160 p_atomic_inc(&ws
->num_cs
);
164 #define OUT_CS(cs, value) (cs)->buf[(cs)->cdw++] = (value)
166 static INLINE
void update_domains(struct drm_radeon_cs_reloc
*reloc
,
167 enum r300_buffer_domain rd
,
168 enum r300_buffer_domain wd
,
169 enum r300_buffer_domain
*added_domains
)
171 *added_domains
= (rd
| wd
) & ~(reloc
->read_domains
| reloc
->write_domain
);
173 if (reloc
->read_domains
& wd
) {
174 reloc
->read_domains
= rd
;
175 reloc
->write_domain
= wd
;
176 } else if (rd
& reloc
->write_domain
) {
177 reloc
->read_domains
= rd
;
178 reloc
->write_domain
|= wd
;
180 reloc
->read_domains
|= rd
;
181 reloc
->write_domain
|= wd
;
185 int radeon_get_reloc(struct radeon_cs_context
*csc
, struct radeon_bo
*bo
)
187 struct drm_radeon_cs_reloc
*reloc
;
189 unsigned hash
= bo
->handle
& (sizeof(csc
->is_handle_added
)-1);
191 if (csc
->is_handle_added
[hash
]) {
192 reloc
= csc
->relocs_hashlist
[hash
];
193 if (reloc
->handle
== bo
->handle
) {
194 return csc
->reloc_indices_hashlist
[hash
];
197 /* Hash collision, look for the BO in the list of relocs linearly. */
198 for (i
= csc
->crelocs
; i
!= 0;) {
200 reloc
= &csc
->relocs
[i
];
201 if (reloc
->handle
== bo
->handle
) {
202 /* Put this reloc in the hash list.
203 * This will prevent additional hash collisions if there are
204 * several subsequent get_reloc calls of the same buffer.
206 * Example: Assuming buffers A,B,C collide in the hash list,
207 * the following sequence of relocs:
208 * AAAAAAAAAAABBBBBBBBBBBBBBCCCCCCCC
209 * will collide here: ^ and here: ^,
210 * meaning that we should get very few collisions in the end. */
211 csc
->relocs_hashlist
[hash
] = reloc
;
212 csc
->reloc_indices_hashlist
[hash
] = i
;
213 /*printf("write_reloc collision, hash: %i, handle: %i\n", hash, bo->handle);*/
222 static void radeon_add_reloc(struct radeon_cs_context
*csc
,
223 struct radeon_bo
*bo
,
224 enum r300_buffer_domain rd
,
225 enum r300_buffer_domain wd
,
226 enum r300_buffer_domain
*added_domains
)
228 struct drm_radeon_cs_reloc
*reloc
;
230 unsigned hash
= bo
->handle
& (sizeof(csc
->is_handle_added
)-1);
232 if (csc
->is_handle_added
[hash
]) {
233 reloc
= csc
->relocs_hashlist
[hash
];
234 if (reloc
->handle
== bo
->handle
) {
235 update_domains(reloc
, rd
, wd
, added_domains
);
239 /* Hash collision, look for the BO in the list of relocs linearly. */
240 for (i
= csc
->crelocs
; i
!= 0;) {
242 reloc
= &csc
->relocs
[i
];
243 if (reloc
->handle
== bo
->handle
) {
244 update_domains(reloc
, rd
, wd
, added_domains
);
246 csc
->relocs_hashlist
[hash
] = reloc
;
247 csc
->reloc_indices_hashlist
[hash
] = i
;
248 /*printf("write_reloc collision, hash: %i, handle: %i\n", hash, bo->handle);*/
254 /* New relocation, check if the backing array is large enough. */
255 if (csc
->crelocs
>= csc
->nrelocs
) {
259 size
= csc
->nrelocs
* sizeof(struct radeon_bo
*);
260 csc
->relocs_bo
= (struct radeon_bo
**)realloc(csc
->relocs_bo
, size
);
262 size
= csc
->nrelocs
* sizeof(struct drm_radeon_cs_reloc
);
263 csc
->relocs
= (struct drm_radeon_cs_reloc
*)realloc(csc
->relocs
, size
);
265 csc
->chunks
[1].chunk_data
= (uint64_t)(uintptr_t)csc
->relocs
;
268 /* Initialize the new relocation. */
270 p_atomic_inc(&bo
->num_cs_references
);
271 csc
->relocs_bo
[csc
->crelocs
] = bo
;
272 reloc
= &csc
->relocs
[csc
->crelocs
];
273 reloc
->handle
= bo
->handle
;
274 reloc
->read_domains
= rd
;
275 reloc
->write_domain
= wd
;
278 csc
->is_handle_added
[hash
] = TRUE
;
279 csc
->relocs_hashlist
[hash
] = reloc
;
280 csc
->reloc_indices_hashlist
[hash
] = csc
->crelocs
;
282 csc
->chunks
[1].length_dw
+= RELOC_DWORDS
;
285 *added_domains
= rd
| wd
;
288 static void radeon_drm_cs_add_reloc(struct r300_winsys_cs
*rcs
,
289 struct r300_winsys_cs_handle
*buf
,
290 enum r300_buffer_domain rd
,
291 enum r300_buffer_domain wd
)
293 struct radeon_drm_cs
*cs
= radeon_drm_cs(rcs
);
294 struct radeon_bo
*bo
= (struct radeon_bo
*)buf
;
295 enum r300_buffer_domain added_domains
;
297 radeon_add_reloc(cs
->csc
, bo
, rd
, wd
, &added_domains
);
302 if (added_domains
& R300_DOMAIN_GTT
)
303 cs
->csc
->used_gart
+= bo
->size
;
304 if (added_domains
& R300_DOMAIN_VRAM
)
305 cs
->csc
->used_vram
+= bo
->size
;
308 static boolean
radeon_drm_cs_validate(struct r300_winsys_cs
*rcs
)
310 struct radeon_drm_cs
*cs
= radeon_drm_cs(rcs
);
312 return cs
->csc
->used_gart
< cs
->ws
->gart_size
* 0.8 &&
313 cs
->csc
->used_vram
< cs
->ws
->vram_size
* 0.8;
316 static void radeon_drm_cs_write_reloc(struct r300_winsys_cs
*rcs
,
317 struct r300_winsys_cs_handle
*buf
)
319 struct radeon_drm_cs
*cs
= radeon_drm_cs(rcs
);
320 struct radeon_bo
*bo
= (struct radeon_bo
*)buf
;
322 unsigned index
= radeon_get_reloc(cs
->csc
, bo
);
325 fprintf(stderr
, "r300: Cannot get a relocation in %s.\n", __func__
);
329 OUT_CS(&cs
->base
, 0xc0001000);
330 OUT_CS(&cs
->base
, index
* RELOC_DWORDS
);
333 static PIPE_THREAD_ROUTINE(radeon_drm_cs_emit_ioctl
, param
)
335 struct radeon_cs_context
*csc
= (struct radeon_cs_context
*)param
;
338 if (drmCommandWriteRead(csc
->fd
, DRM_RADEON_CS
,
339 &csc
->cs
, sizeof(struct drm_radeon_cs
))) {
340 if (debug_get_bool_option("RADEON_DUMP_CS", FALSE
)) {
343 fprintf(stderr
, "radeon: The kernel rejected CS, dumping...\n");
344 for (i
= 0; i
< csc
->chunks
[0].length_dw
; i
++) {
345 fprintf(stderr
, "0x%08X\n", csc
->buf
[i
]);
348 fprintf(stderr
, "radeon: The kernel rejected CS, "
349 "see dmesg for more information.\n");
353 for (i
= 0; i
< csc
->crelocs
; i
++)
354 p_atomic_dec(&csc
->relocs_bo
[i
]->num_active_ioctls
);
358 void radeon_drm_cs_sync_flush(struct r300_winsys_cs
*rcs
)
360 struct radeon_drm_cs
*cs
= radeon_drm_cs(rcs
);
362 /* Wait for any pending ioctl to complete. */
364 pipe_thread_wait(cs
->thread
);
369 DEBUG_GET_ONCE_BOOL_OPTION(thread
, "RADEON_THREAD", TRUE
)
371 void radeon_drm_cs_flush(struct r300_winsys_cs
*rcs
)
373 struct radeon_drm_cs
*cs
= radeon_drm_cs(rcs
);
374 struct radeon_cs_context
*tmp
;
376 radeon_drm_cs_sync_flush(rcs
);
378 /* If the CS is not empty, emit it in a newly-spawned thread. */
380 unsigned i
, crelocs
= cs
->csc
->crelocs
;
382 cs
->csc
->chunks
[0].length_dw
= cs
->base
.cdw
;
384 for (i
= 0; i
< crelocs
; i
++)
385 p_atomic_inc(&cs
->csc
->relocs_bo
[i
]->num_active_ioctls
);
387 if (cs
->ws
->num_cpus
> 1 && debug_get_option_thread()) {
388 cs
->thread
= pipe_thread_create(radeon_drm_cs_emit_ioctl
, cs
->csc
);
391 radeon_drm_cs_emit_ioctl(cs
->csc
);
395 /* Flip command streams. */
400 /* Prepare a new CS. */
401 radeon_cs_context_cleanup(cs
->csc
);
403 cs
->base
.buf
= cs
->csc
->buf
;
407 static void radeon_drm_cs_destroy(struct r300_winsys_cs
*rcs
)
409 struct radeon_drm_cs
*cs
= radeon_drm_cs(rcs
);
410 radeon_drm_cs_sync_flush(rcs
);
411 radeon_cs_context_cleanup(&cs
->csc1
);
412 radeon_cs_context_cleanup(&cs
->csc2
);
413 p_atomic_dec(&cs
->ws
->num_cs
);
414 radeon_destroy_cs_context(&cs
->csc1
);
415 radeon_destroy_cs_context(&cs
->csc2
);
419 static void radeon_drm_cs_set_flush(struct r300_winsys_cs
*rcs
,
420 void (*flush
)(void *), void *user
)
422 struct radeon_drm_cs
*cs
= radeon_drm_cs(rcs
);
423 cs
->flush_cs
= flush
;
424 cs
->flush_data
= user
;
427 static boolean
radeon_bo_is_referenced(struct r300_winsys_cs
*rcs
,
428 struct r300_winsys_cs_handle
*_buf
)
430 struct radeon_drm_cs
*cs
= radeon_drm_cs(rcs
);
431 struct radeon_bo
*bo
= (struct radeon_bo
*)_buf
;
433 return radeon_bo_is_referenced_by_cs(cs
, bo
);
436 void radeon_drm_cs_init_functions(struct radeon_drm_winsys
*ws
)
438 ws
->base
.cs_create
= radeon_drm_cs_create
;
439 ws
->base
.cs_destroy
= radeon_drm_cs_destroy
;
440 ws
->base
.cs_add_reloc
= radeon_drm_cs_add_reloc
;
441 ws
->base
.cs_validate
= radeon_drm_cs_validate
;
442 ws
->base
.cs_write_reloc
= radeon_drm_cs_write_reloc
;
443 ws
->base
.cs_flush
= radeon_drm_cs_flush
;
444 ws
->base
.cs_sync_flush
= radeon_drm_cs_sync_flush
;
445 ws
->base
.cs_set_flush
= radeon_drm_cs_set_flush
;
446 ws
->base
.cs_is_buffer_referenced
= radeon_bo_is_referenced
;