2 * Copyright © 2014-2017 Broadcom
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5 * copy of this software and associated documentation files (the "Software"),
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11 * The above copyright notice and this permission notice (including the next
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16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
25 * @file v3d_simulator.c
27 * Implements VC5 simulation on top of a non-VC5 GEM fd.
29 * This file's goal is to emulate the VC5 ioctls' behavior in the kernel on
30 * top of the simpenrose software simulator. Generally, VC5 driver BOs have a
31 * GEM-side copy of their contents and a simulator-side memory area that the
32 * GEM contents get copied into during simulation. Once simulation is done,
33 * the simulator's data is copied back out to the GEM BOs, so that rendering
34 * appears on the screen as if actual hardware rendering had been done.
36 * One of the limitations of this code is that we shouldn't really need a
37 * GEM-side BO for non-window-system BOs. However, do we need unique BO
38 * handles for each of our GEM bos so that this file can look up its state
39 * from the handle passed in at submit ioctl time (also, a couple of places
40 * outside of this file still call ioctls directly on the fd).
42 * Another limitation is that BO import doesn't work unless the underlying
43 * window system's BO size matches what VC5 is going to use, which of course
44 * doesn't work out in practice. This means that for now, only DRI3 (VC5
45 * makes the winsys BOs) is supported, not DRI2 (window system makes the winys
49 #ifdef USE_V3D_SIMULATOR
52 #include "util/hash_table.h"
53 #include "util/ralloc.h"
55 #include "util/u_dynarray.h"
56 #include "util/u_memory.h"
57 #include "util/u_mm.h"
58 #include "drm-uapi/i915_drm.h"
59 #include "v3d_simulator_wrapper.h"
61 #include "v3d_screen.h"
62 #include "v3d_context.h"
64 /** Global (across GEM fds) state for the simulator */
65 static struct v3d_simulator_state
{
72 /* Base virtual address of the heap. */
74 /* Base hardware address of the heap. */
76 /* Size of the heap. */
79 struct mem_block
*heap
;
80 struct mem_block
*overflow
;
82 /** Mapping from GEM fd to struct v3d_simulator_file * */
83 struct hash_table
*fd_map
;
85 struct util_dynarray bin_oom
;
88 .mutex
= _MTX_INITIALIZER_NP
,
91 /** Per-GEM-fd state for the simulator. */
92 struct v3d_simulator_file
{
95 /** Mapping from GEM handle to struct v3d_simulator_bo * */
96 struct hash_table
*bo_map
;
98 struct mem_block
*gmp
;
101 /** Actual GEM fd is i915, so we should use their create ioctl. */
105 /** Wrapper for drm_v3d_bo tracking the simulator-specific state. */
106 struct v3d_simulator_bo
{
107 struct v3d_simulator_file
*file
;
109 /** Area for this BO within sim_state->mem */
110 struct mem_block
*block
;
112 uint64_t mmap_offset
;
122 return (void *)(uintptr_t)key
;
125 static struct v3d_simulator_file
*
126 v3d_get_simulator_file_for_fd(int fd
)
128 struct hash_entry
*entry
= _mesa_hash_table_search(sim_state
.fd_map
,
130 return entry
? entry
->data
: NULL
;
133 /* A marker placed just after each BO, then checked after rendering to make
134 * sure it's still there.
136 #define BO_SENTINEL 0xfedcba98
139 #define GMP_ALIGN2 17
142 * Sets the range of GPU virtual address space to have the given GMP
143 * permissions (bit 0 = read, bit 1 = write, write-only forbidden).
146 set_gmp_flags(struct v3d_simulator_file
*file
,
147 uint32_t offset
, uint32_t size
, uint32_t flag
)
149 assert((offset
& ((1 << GMP_ALIGN2
) - 1)) == 0);
150 int gmp_offset
= offset
>> GMP_ALIGN2
;
151 int gmp_count
= align(size
, 1 << GMP_ALIGN2
) >> GMP_ALIGN2
;
152 uint32_t *gmp
= file
->gmp_vaddr
;
156 for (int i
= gmp_offset
; i
< gmp_offset
+ gmp_count
; i
++) {
157 int32_t bitshift
= (i
% 16) * 2;
158 gmp
[i
/ 16] &= ~(0x3 << bitshift
);
159 gmp
[i
/ 16] |= flag
<< bitshift
;
164 * Allocates space in simulator memory and returns a tracking struct for it
165 * that also contains the drm_gem_cma_object struct.
167 static struct v3d_simulator_bo
*
168 v3d_create_simulator_bo(int fd
, unsigned size
)
170 struct v3d_simulator_file
*file
= v3d_get_simulator_file_for_fd(fd
);
171 struct v3d_simulator_bo
*sim_bo
= rzalloc(file
,
172 struct v3d_simulator_bo
);
173 size
= align(size
, 4096);
177 mtx_lock(&sim_state
.mutex
);
178 sim_bo
->block
= u_mmAllocMem(sim_state
.heap
, size
+ 4, GMP_ALIGN2
, 0);
179 mtx_unlock(&sim_state
.mutex
);
180 assert(sim_bo
->block
);
182 set_gmp_flags(file
, sim_bo
->block
->ofs
, size
, 0x3);
186 /* Allocate space for the buffer in simulator memory. */
187 sim_bo
->sim_vaddr
= sim_state
.mem
+ sim_bo
->block
->ofs
- sim_state
.mem_base
;
188 memset(sim_bo
->sim_vaddr
, 0xd0, size
);
190 *(uint32_t *)(sim_bo
->sim_vaddr
+ sim_bo
->size
) = BO_SENTINEL
;
195 static struct v3d_simulator_bo
*
196 v3d_create_simulator_bo_for_gem(int fd
, int handle
, unsigned size
)
198 struct v3d_simulator_file
*file
= v3d_get_simulator_file_for_fd(fd
);
199 struct v3d_simulator_bo
*sim_bo
=
200 v3d_create_simulator_bo(fd
, size
);
202 sim_bo
->handle
= handle
;
204 /* Map the GEM buffer for copy in/out to the simulator. i915 blocks
205 * dumb mmap on render nodes, so use their ioctl directly if we're on
210 struct drm_i915_gem_mmap_gtt map
= {
214 /* We could potentially use non-gtt (cached) for LLC systems,
215 * but the copy-in/out won't be the limiting factor on
218 ret
= drmIoctl(fd
, DRM_IOCTL_I915_GEM_MMAP_GTT
, &map
);
219 sim_bo
->mmap_offset
= map
.offset
;
221 struct drm_mode_map_dumb map
= {
225 ret
= drmIoctl(fd
, DRM_IOCTL_MODE_MAP_DUMB
, &map
);
226 sim_bo
->mmap_offset
= map
.offset
;
229 fprintf(stderr
, "Failed to get MMAP offset: %d\n", ret
);
233 sim_bo
->gem_vaddr
= mmap(NULL
, sim_bo
->size
,
234 PROT_READ
| PROT_WRITE
, MAP_SHARED
,
235 fd
, sim_bo
->mmap_offset
);
236 if (sim_bo
->gem_vaddr
== MAP_FAILED
) {
237 fprintf(stderr
, "mmap of bo %d (offset 0x%016llx, size %d) failed\n",
238 handle
, (long long)sim_bo
->mmap_offset
, sim_bo
->size
);
242 /* A handle of 0 is used for v3d_gem.c internal allocations that
243 * don't need to go in the lookup table.
246 mtx_lock(&sim_state
.mutex
);
247 _mesa_hash_table_insert(file
->bo_map
, int_to_key(handle
),
249 mtx_unlock(&sim_state
.mutex
);
258 v3d_simulator_get_spill(uint32_t spill_size
)
260 struct v3d_simulator_bo
*sim_bo
=
261 v3d_create_simulator_bo(bin_fd
, spill_size
);
263 util_dynarray_append(&sim_state
.bin_oom
, struct v3d_simulator_bo
*,
266 return sim_bo
->block
->ofs
;
270 v3d_free_simulator_bo(struct v3d_simulator_bo
*sim_bo
)
272 struct v3d_simulator_file
*sim_file
= sim_bo
->file
;
274 set_gmp_flags(sim_file
, sim_bo
->block
->ofs
, sim_bo
->size
, 0x0);
276 if (sim_bo
->gem_vaddr
)
277 munmap(sim_bo
->gem_vaddr
, sim_bo
->size
);
279 mtx_lock(&sim_state
.mutex
);
280 u_mmFreeMem(sim_bo
->block
);
281 if (sim_bo
->handle
) {
282 _mesa_hash_table_remove_key(sim_file
->bo_map
,
283 int_to_key(sim_bo
->handle
));
285 mtx_unlock(&sim_state
.mutex
);
289 static struct v3d_simulator_bo
*
290 v3d_get_simulator_bo(struct v3d_simulator_file
*file
, int gem_handle
)
292 mtx_lock(&sim_state
.mutex
);
293 struct hash_entry
*entry
=
294 _mesa_hash_table_search(file
->bo_map
, int_to_key(gem_handle
));
295 mtx_unlock(&sim_state
.mutex
);
297 return entry
? entry
->data
: NULL
;
301 v3d_simulator_copy_in_handle(struct v3d_simulator_file
*file
, int handle
)
303 struct v3d_simulator_bo
*sim_bo
= v3d_get_simulator_bo(file
, handle
);
308 memcpy(sim_bo
->sim_vaddr
, sim_bo
->gem_vaddr
, sim_bo
->size
);
312 v3d_simulator_copy_out_handle(struct v3d_simulator_file
*file
, int handle
)
314 struct v3d_simulator_bo
*sim_bo
= v3d_get_simulator_bo(file
, handle
);
319 memcpy(sim_bo
->gem_vaddr
, sim_bo
->sim_vaddr
, sim_bo
->size
);
321 if (*(uint32_t *)(sim_bo
->sim_vaddr
+
322 sim_bo
->size
) != BO_SENTINEL
) {
323 fprintf(stderr
, "Buffer overflow in handle %d\n",
329 v3d_simulator_pin_bos(struct v3d_simulator_file
*file
,
330 struct drm_v3d_submit_cl
*submit
)
332 uint32_t *bo_handles
= (uint32_t *)(uintptr_t)submit
->bo_handles
;
334 for (int i
= 0; i
< submit
->bo_handle_count
; i
++)
335 v3d_simulator_copy_in_handle(file
, bo_handles
[i
]);
341 v3d_simulator_unpin_bos(struct v3d_simulator_file
*file
,
342 struct drm_v3d_submit_cl
*submit
)
344 uint32_t *bo_handles
= (uint32_t *)(uintptr_t)submit
->bo_handles
;
346 for (int i
= 0; i
< submit
->bo_handle_count
; i
++)
347 v3d_simulator_copy_out_handle(file
, bo_handles
[i
]);
353 v3d_simulator_submit_cl_ioctl(int fd
, struct drm_v3d_submit_cl
*submit
)
355 struct v3d_simulator_file
*file
= v3d_get_simulator_file_for_fd(fd
);
358 ret
= v3d_simulator_pin_bos(file
, submit
);
362 mtx_lock(&sim_state
.submit_lock
);
364 if (sim_state
.ver
>= 41)
365 v3d41_simulator_submit_cl_ioctl(sim_state
.v3d
, submit
, file
->gmp
->ofs
);
367 v3d33_simulator_submit_cl_ioctl(sim_state
.v3d
, submit
, file
->gmp
->ofs
);
369 util_dynarray_foreach(&sim_state
.bin_oom
, struct v3d_simulator_bo
*,
371 v3d_free_simulator_bo(*sim_bo
);
373 util_dynarray_clear(&sim_state
.bin_oom
);
375 mtx_unlock(&sim_state
.submit_lock
);
377 ret
= v3d_simulator_unpin_bos(file
, submit
);
385 * Do fixups after a BO has been opened from a handle.
387 * This could be done at DRM_IOCTL_GEM_OPEN/DRM_IOCTL_GEM_PRIME_FD_TO_HANDLE
388 * time, but we're still using drmPrimeFDToHandle() so we have this helper to
389 * be called afterward instead.
391 void v3d_simulator_open_from_handle(int fd
, int handle
, uint32_t size
)
393 v3d_create_simulator_bo_for_gem(fd
, handle
, size
);
397 * Simulated ioctl(fd, DRM_VC5_CREATE_BO) implementation.
399 * Making a VC5 BO is just a matter of making a corresponding BO on the host.
402 v3d_simulator_create_bo_ioctl(int fd
, struct drm_v3d_create_bo
*args
)
404 struct v3d_simulator_file
*file
= v3d_get_simulator_file_for_fd(fd
);
406 /* i915 bans dumb create on render nodes, so we have to use their
407 * native ioctl in case we're on a render node.
411 struct drm_i915_gem_create create
= {
414 ret
= drmIoctl(fd
, DRM_IOCTL_I915_GEM_CREATE
, &create
);
416 args
->handle
= create
.handle
;
418 struct drm_mode_create_dumb create
= {
421 .height
= (args
->size
+ 127) / 128,
424 ret
= drmIoctl(fd
, DRM_IOCTL_MODE_CREATE_DUMB
, &create
);
425 assert(ret
!= 0 || create
.size
>= args
->size
);
427 args
->handle
= create
.handle
;
431 struct v3d_simulator_bo
*sim_bo
=
432 v3d_create_simulator_bo_for_gem(fd
, args
->handle
,
435 args
->offset
= sim_bo
->block
->ofs
;
442 * Simulated ioctl(fd, DRM_VC5_MMAP_BO) implementation.
444 * We've already grabbed the mmap offset when we created the sim bo, so just
448 v3d_simulator_mmap_bo_ioctl(int fd
, struct drm_v3d_mmap_bo
*args
)
450 struct v3d_simulator_file
*file
= v3d_get_simulator_file_for_fd(fd
);
451 struct v3d_simulator_bo
*sim_bo
= v3d_get_simulator_bo(file
,
454 args
->offset
= sim_bo
->mmap_offset
;
460 v3d_simulator_get_bo_offset_ioctl(int fd
, struct drm_v3d_get_bo_offset
*args
)
462 struct v3d_simulator_file
*file
= v3d_get_simulator_file_for_fd(fd
);
463 struct v3d_simulator_bo
*sim_bo
= v3d_get_simulator_bo(file
,
466 args
->offset
= sim_bo
->block
->ofs
;
472 v3d_simulator_gem_close_ioctl(int fd
, struct drm_gem_close
*args
)
474 /* Free the simulator's internal tracking. */
475 struct v3d_simulator_file
*file
= v3d_get_simulator_file_for_fd(fd
);
476 struct v3d_simulator_bo
*sim_bo
= v3d_get_simulator_bo(file
,
479 v3d_free_simulator_bo(sim_bo
);
481 /* Pass the call on down. */
482 return drmIoctl(fd
, DRM_IOCTL_GEM_CLOSE
, args
);
486 v3d_simulator_get_param_ioctl(int fd
, struct drm_v3d_get_param
*args
)
488 if (sim_state
.ver
>= 41)
489 return v3d41_simulator_get_param_ioctl(sim_state
.v3d
, args
);
491 return v3d33_simulator_get_param_ioctl(sim_state
.v3d
, args
);
495 v3d_simulator_submit_tfu_ioctl(int fd
, struct drm_v3d_submit_tfu
*args
)
497 struct v3d_simulator_file
*file
= v3d_get_simulator_file_for_fd(fd
);
500 v3d_simulator_copy_in_handle(file
, args
->bo_handles
[0]);
501 v3d_simulator_copy_in_handle(file
, args
->bo_handles
[1]);
502 v3d_simulator_copy_in_handle(file
, args
->bo_handles
[2]);
503 v3d_simulator_copy_in_handle(file
, args
->bo_handles
[3]);
505 if (sim_state
.ver
>= 41)
506 ret
= v3d41_simulator_submit_tfu_ioctl(sim_state
.v3d
, args
);
508 ret
= v3d33_simulator_submit_tfu_ioctl(sim_state
.v3d
, args
);
510 v3d_simulator_copy_out_handle(file
, args
->bo_handles
[0]);
516 v3d_simulator_ioctl(int fd
, unsigned long request
, void *args
)
519 case DRM_IOCTL_V3D_SUBMIT_CL
:
520 return v3d_simulator_submit_cl_ioctl(fd
, args
);
521 case DRM_IOCTL_V3D_CREATE_BO
:
522 return v3d_simulator_create_bo_ioctl(fd
, args
);
523 case DRM_IOCTL_V3D_MMAP_BO
:
524 return v3d_simulator_mmap_bo_ioctl(fd
, args
);
525 case DRM_IOCTL_V3D_GET_BO_OFFSET
:
526 return v3d_simulator_get_bo_offset_ioctl(fd
, args
);
528 case DRM_IOCTL_V3D_WAIT_BO
:
529 /* We do all of the v3d rendering synchronously, so we just
530 * return immediately on the wait ioctls. This ignores any
531 * native rendering to the host BO, so it does mean we race on
532 * front buffer rendering.
536 case DRM_IOCTL_V3D_GET_PARAM
:
537 return v3d_simulator_get_param_ioctl(fd
, args
);
539 case DRM_IOCTL_GEM_CLOSE
:
540 return v3d_simulator_gem_close_ioctl(fd
, args
);
542 case DRM_IOCTL_V3D_SUBMIT_TFU
:
543 return v3d_simulator_submit_tfu_ioctl(fd
, args
);
545 case DRM_IOCTL_GEM_OPEN
:
546 case DRM_IOCTL_GEM_FLINK
:
547 return drmIoctl(fd
, request
, args
);
549 fprintf(stderr
, "Unknown ioctl 0x%08x\n", (int)request
);
555 v3d_simulator_init_global(const struct v3d_device_info
*devinfo
)
557 mtx_lock(&sim_state
.mutex
);
558 if (sim_state
.refcount
++) {
559 mtx_unlock(&sim_state
.mutex
);
563 sim_state
.v3d
= v3d_hw_auto_new(NULL
);
564 v3d_hw_alloc_mem(sim_state
.v3d
, 1024 * 1024 * 1024);
566 v3d_hw_get_mem(sim_state
.v3d
, &sim_state
.mem_size
,
569 /* Allocate from anywhere from 4096 up. We don't allocate at 0,
570 * because for OQs and some other addresses in the HW, 0 means
573 sim_state
.heap
= u_mmInit(4096, sim_state
.mem_size
- 4096);
575 /* Make a block of 0xd0 at address 0 to make sure we don't screw up
578 struct mem_block
*b
= u_mmAllocMem(sim_state
.heap
, 4096, GMP_ALIGN2
, 0);
579 memset(sim_state
.mem
+ b
->ofs
- sim_state
.mem_base
, 0xd0, 4096);
581 sim_state
.ver
= v3d_hw_get_version(sim_state
.v3d
);
583 mtx_unlock(&sim_state
.mutex
);
586 _mesa_hash_table_create(NULL
,
588 _mesa_key_pointer_equal
);
590 util_dynarray_init(&sim_state
.bin_oom
, NULL
);
592 if (sim_state
.ver
>= 41)
593 v3d41_simulator_init_regs(sim_state
.v3d
);
595 v3d33_simulator_init_regs(sim_state
.v3d
);
599 v3d_simulator_init(struct v3d_screen
*screen
)
601 v3d_simulator_init_global(&screen
->devinfo
);
603 screen
->sim_file
= rzalloc(screen
, struct v3d_simulator_file
);
604 struct v3d_simulator_file
*sim_file
= screen
->sim_file
;
606 drmVersionPtr version
= drmGetVersion(screen
->fd
);
607 if (version
&& strncmp(version
->name
, "i915", version
->name_len
) == 0)
608 sim_file
->is_i915
= true;
609 drmFreeVersion(version
);
611 screen
->sim_file
->bo_map
=
612 _mesa_hash_table_create(screen
->sim_file
,
614 _mesa_key_pointer_equal
);
616 mtx_lock(&sim_state
.mutex
);
617 _mesa_hash_table_insert(sim_state
.fd_map
, int_to_key(screen
->fd
+ 1),
619 mtx_unlock(&sim_state
.mutex
);
621 sim_file
->gmp
= u_mmAllocMem(sim_state
.heap
, 8096, GMP_ALIGN2
, 0);
622 sim_file
->gmp_vaddr
= (sim_state
.mem
+ sim_file
->gmp
->ofs
-
624 memset(sim_file
->gmp_vaddr
, 0, 8096);
628 v3d_simulator_destroy(struct v3d_screen
*screen
)
630 mtx_lock(&sim_state
.mutex
);
631 if (!--sim_state
.refcount
) {
632 _mesa_hash_table_destroy(sim_state
.fd_map
, NULL
);
633 util_dynarray_fini(&sim_state
.bin_oom
);
634 u_mmDestroy(sim_state
.heap
);
635 /* No memsetting the struct, because it contains the mutex. */
636 sim_state
.mem
= NULL
;
638 mtx_unlock(&sim_state
.mutex
);
641 #endif /* USE_V3D_SIMULATOR */