summaryrefslogtreecommitdiffstats
path: root/src/gallium/drivers/v3d/v3d_simulator.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/gallium/drivers/v3d/v3d_simulator.c')
-rw-r--r--src/gallium/drivers/v3d/v3d_simulator.c660
1 files changed, 660 insertions, 0 deletions
diff --git a/src/gallium/drivers/v3d/v3d_simulator.c b/src/gallium/drivers/v3d/v3d_simulator.c
new file mode 100644
index 00000000000..86e4ed3be3d
--- /dev/null
+++ b/src/gallium/drivers/v3d/v3d_simulator.c
@@ -0,0 +1,660 @@
+/*
+ * Copyright © 2014-2017 Broadcom
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+/**
+ * @file vc5_simulator.c
+ *
+ * Implements VC5 simulation on top of a non-VC5 GEM fd.
+ *
+ * This file's goal is to emulate the VC5 ioctls' behavior in the kernel on
+ * top of the simpenrose software simulator. Generally, VC5 driver BOs have a
+ * GEM-side copy of their contents and a simulator-side memory area that the
+ * GEM contents get copied into during simulation. Once simulation is done,
+ * the simulator's data is copied back out to the GEM BOs, so that rendering
+ * appears on the screen as if actual hardware rendering had been done.
+ *
+ * One of the limitations of this code is that we shouldn't really need a
+ * GEM-side BO for non-window-system BOs. However, do we need unique BO
+ * handles for each of our GEM bos so that this file can look up its state
+ * from the handle passed in at submit ioctl time (also, a couple of places
+ * outside of this file still call ioctls directly on the fd).
+ *
+ * Another limitation is that BO import doesn't work unless the underlying
+ * window system's BO size matches what VC5 is going to use, which of course
+ * doesn't work out in practice. This means that for now, only DRI3 (VC5
+ * makes the winsys BOs) is supported, not DRI2 (window system makes the winys
+ * BOs).
+ */
+
+#ifdef USE_V3D_SIMULATOR
+
+#include <sys/mman.h>
+#include "util/hash_table.h"
+#include "util/ralloc.h"
+#include "util/set.h"
+#include "util/u_memory.h"
+#include "util/u_mm.h"
+#include "v3d_simulator_wrapper.h"
+
+#include "v3d_screen.h"
+#include "v3d_context.h"
+
+/** Global (across GEM fds) state for the simulator */
+static struct vc5_simulator_state {
+ mtx_t mutex;
+
+ struct v3d_hw *v3d;
+ int ver;
+
+ /* Base virtual address of the heap. */
+ void *mem;
+ /* Base hardware address of the heap. */
+ uint32_t mem_base;
+ /* Size of the heap. */
+ size_t mem_size;
+
+ struct mem_block *heap;
+ struct mem_block *overflow;
+
+ /** Mapping from GEM handle to struct vc5_simulator_bo * */
+ struct hash_table *fd_map;
+
+ int refcount;
+} sim_state = {
+ .mutex = _MTX_INITIALIZER_NP,
+};
+
+/** Per-GEM-fd state for the simulator. */
+struct vc5_simulator_file {
+ int fd;
+
+ /** Mapping from GEM handle to struct vc5_simulator_bo * */
+ struct hash_table *bo_map;
+
+ struct mem_block *gmp;
+ void *gmp_vaddr;
+};
+
+/** Wrapper for drm_vc5_bo tracking the simulator-specific state. */
+struct vc5_simulator_bo {
+ struct vc5_simulator_file *file;
+
+ /** Area for this BO within sim_state->mem */
+ struct mem_block *block;
+ uint32_t size;
+ void *vaddr;
+
+ void *winsys_map;
+ uint32_t winsys_stride;
+
+ int handle;
+};
+
+static void *
+int_to_key(int key)
+{
+ return (void *)(uintptr_t)key;
+}
+
+static struct vc5_simulator_file *
+vc5_get_simulator_file_for_fd(int fd)
+{
+ struct hash_entry *entry = _mesa_hash_table_search(sim_state.fd_map,
+ int_to_key(fd + 1));
+ return entry ? entry->data : NULL;
+}
+
+/* A marker placed just after each BO, then checked after rendering to make
+ * sure it's still there.
+ */
+#define BO_SENTINEL 0xfedcba98
+
+/* 128kb */
+#define GMP_ALIGN2 17
+
+/**
+ * Sets the range of GPU virtual address space to have the given GMP
+ * permissions (bit 0 = read, bit 1 = write, write-only forbidden).
+ */
+static void
+set_gmp_flags(struct vc5_simulator_file *file,
+ uint32_t offset, uint32_t size, uint32_t flag)
+{
+ assert((offset & ((1 << GMP_ALIGN2) - 1)) == 0);
+ int gmp_offset = offset >> GMP_ALIGN2;
+ int gmp_count = align(size, 1 << GMP_ALIGN2) >> GMP_ALIGN2;
+ uint32_t *gmp = file->gmp_vaddr;
+
+ assert(flag <= 0x3);
+
+ for (int i = gmp_offset; i < gmp_offset + gmp_count; i++) {
+ int32_t bitshift = (i % 16) * 2;
+ gmp[i / 16] &= ~(0x3 << bitshift);
+ gmp[i / 16] |= flag << bitshift;
+ }
+}
+
+/**
+ * Allocates space in simulator memory and returns a tracking struct for it
+ * that also contains the drm_gem_cma_object struct.
+ */
+static struct vc5_simulator_bo *
+vc5_create_simulator_bo(int fd, int handle, unsigned size)
+{
+ struct vc5_simulator_file *file = vc5_get_simulator_file_for_fd(fd);
+ struct vc5_simulator_bo *sim_bo = rzalloc(file,
+ struct vc5_simulator_bo);
+ size = align(size, 4096);
+
+ sim_bo->file = file;
+ sim_bo->handle = handle;
+
+ mtx_lock(&sim_state.mutex);
+ sim_bo->block = u_mmAllocMem(sim_state.heap, size + 4, GMP_ALIGN2, 0);
+ mtx_unlock(&sim_state.mutex);
+ assert(sim_bo->block);
+
+ set_gmp_flags(file, sim_bo->block->ofs, size, 0x3);
+
+ sim_bo->size = size;
+ sim_bo->vaddr = sim_state.mem + sim_bo->block->ofs - sim_state.mem_base;
+ memset(sim_bo->vaddr, 0xd0, size);
+
+ *(uint32_t *)(sim_bo->vaddr + sim_bo->size) = BO_SENTINEL;
+
+ /* A handle of 0 is used for vc5_gem.c internal allocations that
+ * don't need to go in the lookup table.
+ */
+ if (handle != 0) {
+ mtx_lock(&sim_state.mutex);
+ _mesa_hash_table_insert(file->bo_map, int_to_key(handle),
+ sim_bo);
+ mtx_unlock(&sim_state.mutex);
+ }
+
+ return sim_bo;
+}
+
+static void
+vc5_free_simulator_bo(struct vc5_simulator_bo *sim_bo)
+{
+ struct vc5_simulator_file *sim_file = sim_bo->file;
+
+ if (sim_bo->winsys_map)
+ munmap(sim_bo->winsys_map, sim_bo->size);
+
+ set_gmp_flags(sim_file, sim_bo->block->ofs, sim_bo->size, 0x0);
+
+ mtx_lock(&sim_state.mutex);
+ u_mmFreeMem(sim_bo->block);
+ if (sim_bo->handle) {
+ struct hash_entry *entry =
+ _mesa_hash_table_search(sim_file->bo_map,
+ int_to_key(sim_bo->handle));
+ _mesa_hash_table_remove(sim_file->bo_map, entry);
+ }
+ mtx_unlock(&sim_state.mutex);
+ ralloc_free(sim_bo);
+}
+
+static struct vc5_simulator_bo *
+vc5_get_simulator_bo(struct vc5_simulator_file *file, int gem_handle)
+{
+ mtx_lock(&sim_state.mutex);
+ struct hash_entry *entry =
+ _mesa_hash_table_search(file->bo_map, int_to_key(gem_handle));
+ mtx_unlock(&sim_state.mutex);
+
+ return entry ? entry->data : NULL;
+}
+
+static int
+vc5_simulator_pin_bos(int fd, struct vc5_job *job)
+{
+ struct vc5_simulator_file *file = vc5_get_simulator_file_for_fd(fd);
+ struct set_entry *entry;
+
+ set_foreach(job->bos, entry) {
+ struct vc5_bo *bo = (struct vc5_bo *)entry->key;
+ struct vc5_simulator_bo *sim_bo =
+ vc5_get_simulator_bo(file, bo->handle);
+
+ vc5_bo_map(bo);
+ memcpy(sim_bo->vaddr, bo->map, bo->size);
+ }
+
+ return 0;
+}
+
+static int
+vc5_simulator_unpin_bos(int fd, struct vc5_job *job)
+{
+ struct vc5_simulator_file *file = vc5_get_simulator_file_for_fd(fd);
+ struct set_entry *entry;
+
+ set_foreach(job->bos, entry) {
+ struct vc5_bo *bo = (struct vc5_bo *)entry->key;
+ struct vc5_simulator_bo *sim_bo =
+ vc5_get_simulator_bo(file, bo->handle);
+
+ if (*(uint32_t *)(sim_bo->vaddr +
+ sim_bo->size) != BO_SENTINEL) {
+ fprintf(stderr, "Buffer overflow in %s\n", bo->name);
+ }
+
+ vc5_bo_map(bo);
+ memcpy(bo->map, sim_bo->vaddr, bo->size);
+ }
+
+ return 0;
+}
+
+#if 0
+static void
+vc5_dump_to_file(struct vc5_exec_info *exec)
+{
+ static int dumpno = 0;
+ struct drm_vc5_get_hang_state *state;
+ struct drm_vc5_get_hang_state_bo *bo_state;
+ unsigned int dump_version = 0;
+
+ if (!(vc5_debug & VC5_DEBUG_DUMP))
+ return;
+
+ state = calloc(1, sizeof(*state));
+
+ int unref_count = 0;
+ list_for_each_entry_safe(struct drm_vc5_bo, bo, &exec->unref_list,
+ unref_head) {
+ unref_count++;
+ }
+
+ /* Add one more for the overflow area that isn't wrapped in a BO. */
+ state->bo_count = exec->bo_count + unref_count + 1;
+ bo_state = calloc(state->bo_count, sizeof(*bo_state));
+
+ char *filename = NULL;
+ asprintf(&filename, "vc5-dri-%d.dump", dumpno++);
+ FILE *f = fopen(filename, "w+");
+ if (!f) {
+ fprintf(stderr, "Couldn't open %s: %s", filename,
+ strerror(errno));
+ return;
+ }
+
+ fwrite(&dump_version, sizeof(dump_version), 1, f);
+
+ state->ct0ca = exec->ct0ca;
+ state->ct0ea = exec->ct0ea;
+ state->ct1ca = exec->ct1ca;
+ state->ct1ea = exec->ct1ea;
+ state->start_bin = exec->ct0ca;
+ state->start_render = exec->ct1ca;
+ fwrite(state, sizeof(*state), 1, f);
+
+ int i;
+ for (i = 0; i < exec->bo_count; i++) {
+ struct drm_gem_cma_object *cma_bo = exec->bo[i];
+ bo_state[i].handle = i; /* Not used by the parser. */
+ bo_state[i].paddr = cma_bo->paddr;
+ bo_state[i].size = cma_bo->base.size;
+ }
+
+ list_for_each_entry_safe(struct drm_vc5_bo, bo, &exec->unref_list,
+ unref_head) {
+ struct drm_gem_cma_object *cma_bo = &bo->base;
+ bo_state[i].handle = 0;
+ bo_state[i].paddr = cma_bo->paddr;
+ bo_state[i].size = cma_bo->base.size;
+ i++;
+ }
+
+ /* Add the static overflow memory area. */
+ bo_state[i].handle = exec->bo_count;
+ bo_state[i].paddr = sim_state.overflow->ofs;
+ bo_state[i].size = sim_state.overflow->size;
+ i++;
+
+ fwrite(bo_state, sizeof(*bo_state), state->bo_count, f);
+
+ for (int i = 0; i < exec->bo_count; i++) {
+ struct drm_gem_cma_object *cma_bo = exec->bo[i];
+ fwrite(cma_bo->vaddr, cma_bo->base.size, 1, f);
+ }
+
+ list_for_each_entry_safe(struct drm_vc5_bo, bo, &exec->unref_list,
+ unref_head) {
+ struct drm_gem_cma_object *cma_bo = &bo->base;
+ fwrite(cma_bo->vaddr, cma_bo->base.size, 1, f);
+ }
+
+ void *overflow = calloc(1, sim_state.overflow->size);
+ fwrite(overflow, 1, sim_state.overflow->size, f);
+ free(overflow);
+
+ free(state);
+ free(bo_state);
+ fclose(f);
+}
+#endif
+
+int
+vc5_simulator_flush(struct vc5_context *vc5,
+ struct drm_v3d_submit_cl *submit, struct vc5_job *job)
+{
+ struct vc5_screen *screen = vc5->screen;
+ int fd = screen->fd;
+ struct vc5_simulator_file *file = vc5_get_simulator_file_for_fd(fd);
+ struct vc5_surface *csurf = vc5_surface(vc5->framebuffer.cbufs[0]);
+ struct vc5_resource *ctex = csurf ? vc5_resource(csurf->base.texture) : NULL;
+ struct vc5_simulator_bo *csim_bo = ctex ? vc5_get_simulator_bo(file, ctex->bo->handle) : NULL;
+ uint32_t winsys_stride = ctex ? csim_bo->winsys_stride : 0;
+ uint32_t sim_stride = ctex ? ctex->slices[0].stride : 0;
+ uint32_t row_len = MIN2(sim_stride, winsys_stride);
+ int ret;
+
+ if (ctex && csim_bo->winsys_map) {
+#if 0
+ fprintf(stderr, "%dx%d %d %d %d\n",
+ ctex->base.b.width0, ctex->base.b.height0,
+ winsys_stride,
+ sim_stride,
+ ctex->bo->size);
+#endif
+
+ for (int y = 0; y < ctex->base.height0; y++) {
+ memcpy(ctex->bo->map + y * sim_stride,
+ csim_bo->winsys_map + y * winsys_stride,
+ row_len);
+ }
+ }
+
+ ret = vc5_simulator_pin_bos(fd, job);
+ if (ret)
+ return ret;
+
+ //vc5_dump_to_file(&exec);
+
+ if (sim_state.ver >= 41)
+ v3d41_simulator_flush(sim_state.v3d, submit, file->gmp->ofs);
+ else
+ v3d33_simulator_flush(sim_state.v3d, submit, file->gmp->ofs);
+
+ ret = vc5_simulator_unpin_bos(fd, job);
+ if (ret)
+ return ret;
+
+ if (ctex && csim_bo->winsys_map) {
+ for (int y = 0; y < ctex->base.height0; y++) {
+ memcpy(csim_bo->winsys_map + y * winsys_stride,
+ ctex->bo->map + y * sim_stride,
+ row_len);
+ }
+ }
+
+ return 0;
+}
+
+/**
+ * Map the underlying GEM object from the real hardware GEM handle.
+ */
+static void *
+vc5_simulator_map_winsys_bo(int fd, struct vc5_simulator_bo *sim_bo)
+{
+ int ret;
+ void *map;
+
+ struct drm_mode_map_dumb map_dumb = {
+ .handle = sim_bo->handle,
+ };
+ ret = drmIoctl(fd, DRM_IOCTL_MODE_MAP_DUMB, &map_dumb);
+ if (ret != 0) {
+ fprintf(stderr, "map ioctl failure\n");
+ abort();
+ }
+
+ map = mmap(NULL, sim_bo->size, PROT_READ | PROT_WRITE, MAP_SHARED,
+ fd, map_dumb.offset);
+ if (map == MAP_FAILED) {
+ fprintf(stderr,
+ "mmap of bo %d (offset 0x%016llx, size %d) failed\n",
+ sim_bo->handle, (long long)map_dumb.offset,
+ (int)sim_bo->size);
+ abort();
+ }
+
+ return map;
+}
+
+/**
+ * Do fixups after a BO has been opened from a handle.
+ *
+ * This could be done at DRM_IOCTL_GEM_OPEN/DRM_IOCTL_GEM_PRIME_FD_TO_HANDLE
+ * time, but we're still using drmPrimeFDToHandle() so we have this helper to
+ * be called afterward instead.
+ */
+void vc5_simulator_open_from_handle(int fd, uint32_t winsys_stride,
+ int handle, uint32_t size)
+{
+ struct vc5_simulator_bo *sim_bo =
+ vc5_create_simulator_bo(fd, handle, size);
+
+ sim_bo->winsys_stride = winsys_stride;
+ sim_bo->winsys_map = vc5_simulator_map_winsys_bo(fd, sim_bo);
+}
+
+/**
+ * Simulated ioctl(fd, DRM_VC5_CREATE_BO) implementation.
+ *
+ * Making a VC5 BO is just a matter of making a corresponding BO on the host.
+ */
+static int
+vc5_simulator_create_bo_ioctl(int fd, struct drm_v3d_create_bo *args)
+{
+ int ret;
+ struct drm_mode_create_dumb create = {
+ .width = 128,
+ .bpp = 8,
+ .height = (args->size + 127) / 128,
+ };
+
+ ret = drmIoctl(fd, DRM_IOCTL_MODE_CREATE_DUMB, &create);
+ assert(create.size >= args->size);
+
+ args->handle = create.handle;
+
+ struct vc5_simulator_bo *sim_bo =
+ vc5_create_simulator_bo(fd, create.handle, args->size);
+
+ args->offset = sim_bo->block->ofs;
+
+ return ret;
+}
+
+/**
+ * Simulated ioctl(fd, DRM_VC5_MMAP_BO) implementation.
+ *
+ * We just pass this straight through to dumb mmap.
+ */
+static int
+vc5_simulator_mmap_bo_ioctl(int fd, struct drm_v3d_mmap_bo *args)
+{
+ int ret;
+ struct drm_mode_map_dumb map = {
+ .handle = args->handle,
+ };
+
+ ret = drmIoctl(fd, DRM_IOCTL_MODE_MAP_DUMB, &map);
+ args->offset = map.offset;
+
+ return ret;
+}
+
+static int
+vc5_simulator_get_bo_offset_ioctl(int fd, struct drm_v3d_get_bo_offset *args)
+{
+ struct vc5_simulator_file *file = vc5_get_simulator_file_for_fd(fd);
+ struct vc5_simulator_bo *sim_bo = vc5_get_simulator_bo(file,
+ args->handle);
+
+ args->offset = sim_bo->block->ofs;
+
+ return 0;
+}
+
+static int
+vc5_simulator_gem_close_ioctl(int fd, struct drm_gem_close *args)
+{
+ /* Free the simulator's internal tracking. */
+ struct vc5_simulator_file *file = vc5_get_simulator_file_for_fd(fd);
+ struct vc5_simulator_bo *sim_bo = vc5_get_simulator_bo(file,
+ args->handle);
+
+ vc5_free_simulator_bo(sim_bo);
+
+ /* Pass the call on down. */
+ return drmIoctl(fd, DRM_IOCTL_GEM_CLOSE, args);
+}
+
+static int
+vc5_simulator_get_param_ioctl(int fd, struct drm_v3d_get_param *args)
+{
+ if (sim_state.ver >= 41)
+ return v3d41_simulator_get_param_ioctl(sim_state.v3d, args);
+ else
+ return v3d33_simulator_get_param_ioctl(sim_state.v3d, args);
+}
+
+int
+vc5_simulator_ioctl(int fd, unsigned long request, void *args)
+{
+ switch (request) {
+ case DRM_IOCTL_V3D_CREATE_BO:
+ return vc5_simulator_create_bo_ioctl(fd, args);
+ case DRM_IOCTL_V3D_MMAP_BO:
+ return vc5_simulator_mmap_bo_ioctl(fd, args);
+ case DRM_IOCTL_V3D_GET_BO_OFFSET:
+ return vc5_simulator_get_bo_offset_ioctl(fd, args);
+
+ case DRM_IOCTL_V3D_WAIT_BO:
+ /* We do all of the vc5 rendering synchronously, so we just
+ * return immediately on the wait ioctls. This ignores any
+ * native rendering to the host BO, so it does mean we race on
+ * front buffer rendering.
+ */
+ return 0;
+
+ case DRM_IOCTL_V3D_GET_PARAM:
+ return vc5_simulator_get_param_ioctl(fd, args);
+
+ case DRM_IOCTL_GEM_CLOSE:
+ return vc5_simulator_gem_close_ioctl(fd, args);
+
+ case DRM_IOCTL_GEM_OPEN:
+ case DRM_IOCTL_GEM_FLINK:
+ return drmIoctl(fd, request, args);
+ default:
+ fprintf(stderr, "Unknown ioctl 0x%08x\n", (int)request);
+ abort();
+ }
+}
+
+static void
+vc5_simulator_init_global(const struct v3d_device_info *devinfo)
+{
+ mtx_lock(&sim_state.mutex);
+ if (sim_state.refcount++) {
+ mtx_unlock(&sim_state.mutex);
+ return;
+ }
+
+ sim_state.v3d = v3d_hw_auto_new(NULL);
+ v3d_hw_alloc_mem(sim_state.v3d, 1024 * 1024 * 1024);
+ sim_state.mem_base =
+ v3d_hw_get_mem(sim_state.v3d, &sim_state.mem_size,
+ &sim_state.mem);
+
+ /* Allocate from anywhere from 4096 up. We don't allocate at 0,
+ * because for OQs and some other addresses in the HW, 0 means
+ * disabled.
+ */
+ sim_state.heap = u_mmInit(4096, sim_state.mem_size - 4096);
+
+ /* Make a block of 0xd0 at address 0 to make sure we don't screw up
+ * and land there.
+ */
+ struct mem_block *b = u_mmAllocMem(sim_state.heap, 4096, GMP_ALIGN2, 0);
+ memset(sim_state.mem + b->ofs - sim_state.mem_base, 0xd0, 4096);
+
+ sim_state.ver = v3d_hw_get_version(sim_state.v3d);
+
+ mtx_unlock(&sim_state.mutex);
+
+ sim_state.fd_map =
+ _mesa_hash_table_create(NULL,
+ _mesa_hash_pointer,
+ _mesa_key_pointer_equal);
+
+ if (sim_state.ver >= 41)
+ v3d41_simulator_init_regs(sim_state.v3d);
+ else
+ v3d33_simulator_init_regs(sim_state.v3d);
+}
+
+void
+vc5_simulator_init(struct vc5_screen *screen)
+{
+ vc5_simulator_init_global(&screen->devinfo);
+
+ screen->sim_file = rzalloc(screen, struct vc5_simulator_file);
+ struct vc5_simulator_file *sim_file = screen->sim_file;
+
+ screen->sim_file->bo_map =
+ _mesa_hash_table_create(screen->sim_file,
+ _mesa_hash_pointer,
+ _mesa_key_pointer_equal);
+
+ mtx_lock(&sim_state.mutex);
+ _mesa_hash_table_insert(sim_state.fd_map, int_to_key(screen->fd + 1),
+ screen->sim_file);
+ mtx_unlock(&sim_state.mutex);
+
+ sim_file->gmp = u_mmAllocMem(sim_state.heap, 8096, GMP_ALIGN2, 0);
+ sim_file->gmp_vaddr = (sim_state.mem + sim_file->gmp->ofs -
+ sim_state.mem_base);
+}
+
+void
+vc5_simulator_destroy(struct vc5_screen *screen)
+{
+ mtx_lock(&sim_state.mutex);
+ if (!--sim_state.refcount) {
+ _mesa_hash_table_destroy(sim_state.fd_map, NULL);
+ u_mmDestroy(sim_state.heap);
+ /* No memsetting the struct, because it contains the mutex. */
+ sim_state.mem = NULL;
+ }
+ mtx_unlock(&sim_state.mutex);
+}
+
+#endif /* USE_V3D_SIMULATOR */