| 29,19 → 29,20 |
|---|
| */ |
| #include <drm/drmP.h> |
| #include "radeon.h" |
| #include "radeon_trace.h" |
| |
| |
| int radeon_semaphore_create(struct radeon_device *rdev, |
| struct radeon_semaphore **semaphore) |
| { |
| int r; |
| uint32_t *cpu_addr; |
| int i, r; |
| |
| *semaphore = kmalloc(sizeof(struct radeon_semaphore), GFP_KERNEL); |
| if (*semaphore == NULL) { |
| return -ENOMEM; |
| } |
| r = radeon_sa_bo_new(rdev, &rdev->ring_tmp_bo, |
| &(*semaphore)->sa_bo, 8, 8, true); |
| r = radeon_sa_bo_new(rdev, &rdev->ring_tmp_bo, &(*semaphore)->sa_bo, |
| 8 * RADEON_NUM_SYNCS, 8); |
| if (r) { |
| kfree(*semaphore); |
| *semaphore = NULL; |
| 49,56 → 50,141 |
|---|
| } |
| (*semaphore)->waiters = 0; |
| (*semaphore)->gpu_addr = radeon_sa_bo_gpu_addr((*semaphore)->sa_bo); |
| *((uint64_t*)radeon_sa_bo_cpu_addr((*semaphore)->sa_bo)) = 0; |
| |
| cpu_addr = radeon_sa_bo_cpu_addr((*semaphore)->sa_bo); |
| for (i = 0; i < RADEON_NUM_SYNCS; ++i) |
| cpu_addr[i] = 0; |
| |
| for (i = 0; i < RADEON_NUM_RINGS; ++i) |
| (*semaphore)->sync_to[i] = NULL; |
| |
| return 0; |
| } |
| |
| void radeon_semaphore_emit_signal(struct radeon_device *rdev, int ring, |
| bool radeon_semaphore_emit_signal(struct radeon_device *rdev, int ridx, |
| struct radeon_semaphore *semaphore) |
| { |
| struct radeon_ring *ring = &rdev->ring[ridx]; |
| |
| trace_radeon_semaphore_signale(ridx, semaphore); |
| |
| if (radeon_semaphore_ring_emit(rdev, ridx, ring, semaphore, false)) { |
| --semaphore->waiters; |
| radeon_semaphore_ring_emit(rdev, ring, &rdev->ring[ring], semaphore, false); |
| |
| /* for debugging lockup only, used by sysfs debug files */ |
| ring->last_semaphore_signal_addr = semaphore->gpu_addr; |
| return true; |
| } |
| return false; |
| } |
| |
| void radeon_semaphore_emit_wait(struct radeon_device *rdev, int ring, |
| bool radeon_semaphore_emit_wait(struct radeon_device *rdev, int ridx, |
| struct radeon_semaphore *semaphore) |
| { |
| struct radeon_ring *ring = &rdev->ring[ridx]; |
| |
| trace_radeon_semaphore_wait(ridx, semaphore); |
| |
| if (radeon_semaphore_ring_emit(rdev, ridx, ring, semaphore, true)) { |
| ++semaphore->waiters; |
| radeon_semaphore_ring_emit(rdev, ring, &rdev->ring[ring], semaphore, true); |
| |
| /* for debugging lockup only, used by sysfs debug files */ |
| ring->last_semaphore_wait_addr = semaphore->gpu_addr; |
| return true; |
| } |
| return false; |
| } |
| |
| /* caller must hold ring lock */ |
| /** |
| * radeon_semaphore_sync_to - use the semaphore to sync to a fence |
| * |
| * @semaphore: semaphore object to add fence to |
| * @fence: fence to sync to |
| * |
| * Sync to the fence using this semaphore object |
| */ |
| void radeon_semaphore_sync_to(struct radeon_semaphore *semaphore, |
| struct radeon_fence *fence) |
| { |
| struct radeon_fence *other; |
| |
| if (!fence) |
| return; |
| |
| other = semaphore->sync_to[fence->ring]; |
| semaphore->sync_to[fence->ring] = radeon_fence_later(fence, other); |
| } |
| |
| /** |
| * radeon_semaphore_sync_rings - sync ring to all registered fences |
| * |
| * @rdev: radeon_device pointer |
| * @semaphore: semaphore object to use for sync |
| * @ring: ring that needs sync |
| * |
| * Ensure that all registered fences are signaled before letting |
| * the ring continue. The caller must hold the ring lock. |
| */ |
| int radeon_semaphore_sync_rings(struct radeon_device *rdev, |
| struct radeon_semaphore *semaphore, |
| int signaler, int waiter) |
| int ring) |
| { |
| int r; |
| unsigned count = 0; |
| int i, r; |
| |
| /* no need to signal and wait on the same ring */ |
| if (signaler == waiter) { |
| return 0; |
| } |
| for (i = 0; i < RADEON_NUM_RINGS; ++i) { |
| struct radeon_fence *fence = semaphore->sync_to[i]; |
| |
| /* check if we really need to sync */ |
| if (!radeon_fence_need_sync(fence, ring)) |
| continue; |
| |
| /* prevent GPU deadlocks */ |
| if (!rdev->ring[signaler].ready) { |
| dev_err(rdev->dev, "Trying to sync to a disabled ring!"); |
| if (!rdev->ring[i].ready) { |
| dev_err(rdev->dev, "Syncing to a disabled ring!"); |
| return -EINVAL; |
| } |
| |
| r = radeon_ring_alloc(rdev, &rdev->ring[signaler], 8); |
| if (++count > RADEON_NUM_SYNCS) { |
| /* not enough room, wait manually */ |
| r = radeon_fence_wait(fence, false); |
| if (r) |
| return r; |
| continue; |
| } |
| |
| /* allocate enough space for sync command */ |
| r = radeon_ring_alloc(rdev, &rdev->ring[i], 16); |
| if (r) { |
| return r; |
| } |
| radeon_semaphore_emit_signal(rdev, signaler, semaphore); |
| radeon_ring_commit(rdev, &rdev->ring[signaler]); |
| |
| /* emit the signal semaphore */ |
| if (!radeon_semaphore_emit_signal(rdev, i, semaphore)) { |
| /* signaling wasn't successful wait manually */ |
| radeon_ring_undo(&rdev->ring[i]); |
| r = radeon_fence_wait(fence, false); |
| if (r) |
| return r; |
| continue; |
| } |
| |
| /* we assume caller has already allocated space on waiters ring */ |
| radeon_semaphore_emit_wait(rdev, waiter, semaphore); |
| if (!radeon_semaphore_emit_wait(rdev, ring, semaphore)) { |
| /* waiting wasn't successful wait manually */ |
| radeon_ring_undo(&rdev->ring[i]); |
| r = radeon_fence_wait(fence, false); |
| if (r) |
| return r; |
| continue; |
| } |
| |
| /* for debugging lockup only, used by sysfs debug files */ |
| rdev->ring[signaler].last_semaphore_signal_addr = semaphore->gpu_addr; |
| rdev->ring[waiter].last_semaphore_wait_addr = semaphore->gpu_addr; |
| radeon_ring_commit(rdev, &rdev->ring[i], false); |
| radeon_fence_note_sync(fence, ring); |
| |
| semaphore->gpu_addr += 8; |
| } |
| |
| return 0; |
| } |
| |