diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_sync.c | 162 |
1 files changed, 159 insertions, 3 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_sync.c b/src/mesa/drivers/dri/i965/brw_sync.c index 77d382cab6f..1c5d5a50b6a 100644 --- a/src/mesa/drivers/dri/i965/brw_sync.c +++ b/src/mesa/drivers/dri/i965/brw_sync.c @@ -38,6 +38,8 @@ * performance bottleneck, though. */ +#include <libsync.h> /* Requires Android or libdrm-2.4.72 */ + #include "main/imports.h" #include "brw_context.h" @@ -47,11 +49,19 @@ struct brw_fence { struct brw_context *brw; enum brw_fence_type { + /** The fence waits for completion of brw_fence::batch_bo. */ BRW_FENCE_TYPE_BO_WAIT, + + /** The fence waits for brw_fence::sync_fd to signal. */ + BRW_FENCE_TYPE_SYNC_FD, } type; - /** The fence waits for completion of this batch. */ - drm_intel_bo *batch_bo; + union { + drm_intel_bo *batch_bo; + + /* This struct owns the fd. */ + int sync_fd; + }; mtx_t mutex; bool signalled; @@ -74,6 +84,9 @@ brw_fence_init(struct brw_context *brw, struct brw_fence *fence, case BRW_FENCE_TYPE_BO_WAIT: fence->batch_bo = NULL; break; + case BRW_FENCE_TYPE_SYNC_FD: + fence->sync_fd = -1; + break; } } @@ -85,6 +98,10 @@ brw_fence_finish(struct brw_fence *fence) if (fence->batch_bo) drm_intel_bo_unreference(fence->batch_bo); break; + case BRW_FENCE_TYPE_SYNC_FD: + if (fence->sync_fd != -1) + close(fence->sync_fd); + break; } mtx_destroy(&fence->mutex); @@ -109,11 +126,46 @@ brw_fence_insert_locked(struct brw_context *brw, struct brw_fence *fence) return false; } break; + case BRW_FENCE_TYPE_SYNC_FD: + assert(!fence->signalled); + + if (fence->sync_fd == -1) { + /* Create an out-fence that signals after all pending commands + * complete. + */ + if (intel_batchbuffer_flush_fence(brw, -1, &fence->sync_fd) < 0) + return false; + assert(fence->sync_fd != -1); + } else { + /* Wait on the in-fence before executing any subsequently submitted + * commands. + */ + if (intel_batchbuffer_flush(brw) < 0) + return false; + + /* Emit a dummy batch just for the fence. */ + brw_emit_mi_flush(brw); + if (intel_batchbuffer_flush_fence(brw, fence->sync_fd, NULL) < 0) + return false; + } + break; } return true; } +static bool MUST_CHECK +brw_fence_insert(struct brw_context *brw, struct brw_fence *fence) +{ + bool ret; + + mtx_lock(&fence->mutex); + ret = brw_fence_insert_locked(brw, fence); + mtx_unlock(&fence->mutex); + + return ret; +} + static bool brw_fence_has_completed_locked(struct brw_fence *fence) { @@ -135,6 +187,16 @@ brw_fence_has_completed_locked(struct brw_fence *fence) fence->signalled = true; return true; + + case BRW_FENCE_TYPE_SYNC_FD: + assert(fence->sync_fd != -1); + + if (sync_wait(fence->sync_fd, 0) == -1) + return false; + + fence->signalled = true; + + return true; } return false; @@ -156,6 +218,8 @@ static bool brw_fence_client_wait_locked(struct brw_context *brw, struct brw_fence *fence, uint64_t timeout) { + int32_t timeout_i32; + if (fence->signalled) return true; @@ -182,6 +246,20 @@ brw_fence_client_wait_locked(struct brw_context *brw, struct brw_fence *fence, fence->batch_bo = NULL; return true; + case BRW_FENCE_TYPE_SYNC_FD: + if (fence->sync_fd == -1) + return false; + + if (timeout > INT32_MAX) + timeout_i32 = -1; + else + timeout_i32 = timeout; + + if (sync_wait(fence->sync_fd, timeout_i32) == -1) + return false; + + fence->signalled = true; + return true; } assert(!"bad enum brw_fence_type"); @@ -216,6 +294,16 @@ brw_fence_server_wait(struct brw_context *brw, struct brw_fence *fence) * the previous one is done. */ break; + case BRW_FENCE_TYPE_SYNC_FD: + assert(fence->sync_fd != -1); + + /* The user wants explicit synchronization, so give them what they want. */ + if (!brw_fence_insert(brw, fence)) { + /* FIXME: There exists no way yet to report an error here. If an error + * occurs, continue silently and hope for the best. + */ + } + break; } } @@ -350,12 +438,80 @@ brw_dri_server_wait_sync(__DRIcontext *ctx, void *_fence, unsigned flags) brw_fence_server_wait(fence->brw, fence); } +static unsigned +brw_dri_get_capabilities(__DRIscreen *dri_screen) +{ + struct intel_screen *screen = dri_screen->driverPrivate; + unsigned caps = 0; + + if (screen->has_exec_fence) + caps |= __DRI_FENCE_CAP_NATIVE_FD; + + return caps; +} + +static void * +brw_dri_create_fence_fd(__DRIcontext *dri_ctx, int fd) +{ + struct brw_context *brw = dri_ctx->driverPrivate; + struct brw_fence *fence; + + assert(brw->screen->has_exec_fence); + + fence = calloc(1, sizeof(*fence)); + if (!fence) + return NULL; + + brw_fence_init(brw, fence, BRW_FENCE_TYPE_SYNC_FD); + + if (fd == -1) { + /* Create an out-fence fd */ + if (!brw_fence_insert_locked(brw, fence)) + goto fail; + } else { + /* Import the sync fd as an in-fence. */ + fence->sync_fd = fd; + } + + assert(fence->sync_fd != -1); + + return fence; + +fail: + brw_fence_finish(fence); + free(fence); + return NULL; +} + +static int +brw_dri_get_fence_fd_locked(struct brw_fence *fence) +{ + assert(fence->type == BRW_FENCE_TYPE_SYNC_FD); + return dup(fence->sync_fd); +} + +static int +brw_dri_get_fence_fd(__DRIscreen *dri_screen, void *_fence) +{ + struct brw_fence *fence = _fence; + int fd; + + mtx_lock(&fence->mutex); + fd = brw_dri_get_fence_fd_locked(fence); + mtx_unlock(&fence->mutex); + + return fd; +} + const __DRI2fenceExtension intelFenceExtension = { - .base = { __DRI2_FENCE, 1 }, + .base = { __DRI2_FENCE, 2 }, .create_fence = brw_dri_create_fence, .destroy_fence = brw_dri_destroy_fence, .client_wait_sync = brw_dri_client_wait_sync, .server_wait_sync = brw_dri_server_wait_sync, .get_fence_from_cl_event = NULL, + .get_capabilities = brw_dri_get_capabilities, + .create_fence_fd = brw_dri_create_fence_fd, + .get_fence_fd = brw_dri_get_fence_fd, }; |