--- zzzz-none-000/linux-3.10.107/drivers/gpu/drm/radeon/radeon_ring.c 2017-06-27 09:49:32.000000000 +0000 +++ scorpion-7490-727/linux-3.10.107/drivers/gpu/drm/radeon/radeon_ring.c 2021-02-04 17:41:59.000000000 +0000 @@ -26,278 +26,8 @@ * Jerome Glisse * Christian König */ -#include -#include #include -#include -#include "radeon_reg.h" #include "radeon.h" -#include "atom.h" - -/* - * IB - * IBs (Indirect Buffers) and areas of GPU accessible memory where - * commands are stored. You can put a pointer to the IB in the - * command ring and the hw will fetch the commands from the IB - * and execute them. Generally userspace acceleration drivers - * produce command buffers which are send to the kernel and - * put in IBs for execution by the requested ring. - */ -static int radeon_debugfs_sa_init(struct radeon_device *rdev); - -/** - * radeon_ib_get - request an IB (Indirect Buffer) - * - * @rdev: radeon_device pointer - * @ring: ring index the IB is associated with - * @ib: IB object returned - * @size: requested IB size - * - * Request an IB (all asics). IBs are allocated using the - * suballocator. - * Returns 0 on success, error on failure. - */ -int radeon_ib_get(struct radeon_device *rdev, int ring, - struct radeon_ib *ib, struct radeon_vm *vm, - unsigned size) -{ - int i, r; - - r = radeon_sa_bo_new(rdev, &rdev->ring_tmp_bo, &ib->sa_bo, size, 256, true); - if (r) { - dev_err(rdev->dev, "failed to get a new IB (%d)\n", r); - return r; - } - - r = radeon_semaphore_create(rdev, &ib->semaphore); - if (r) { - return r; - } - - ib->ring = ring; - ib->fence = NULL; - ib->ptr = radeon_sa_bo_cpu_addr(ib->sa_bo); - ib->vm = vm; - if (vm) { - /* ib pool is bound at RADEON_VA_IB_OFFSET in virtual address - * space and soffset is the offset inside the pool bo - */ - ib->gpu_addr = ib->sa_bo->soffset + RADEON_VA_IB_OFFSET; - } else { - ib->gpu_addr = radeon_sa_bo_gpu_addr(ib->sa_bo); - } - ib->is_const_ib = false; - for (i = 0; i < RADEON_NUM_RINGS; ++i) - ib->sync_to[i] = NULL; - - return 0; -} - -/** - * radeon_ib_free - free an IB (Indirect Buffer) - * - * @rdev: radeon_device pointer - * @ib: IB object to free - * - * Free an IB (all asics). - */ -void radeon_ib_free(struct radeon_device *rdev, struct radeon_ib *ib) -{ - radeon_semaphore_free(rdev, &ib->semaphore, ib->fence); - radeon_sa_bo_free(rdev, &ib->sa_bo, ib->fence); - radeon_fence_unref(&ib->fence); -} - -/** - * radeon_ib_sync_to - sync to fence before executing the IB - * - * @ib: IB object to add fence to - * @fence: fence to sync to - * - * Sync to the fence before executing the IB - */ -void radeon_ib_sync_to(struct radeon_ib *ib, struct radeon_fence *fence) -{ - struct radeon_fence *other; - - if (!fence) - return; - - other = ib->sync_to[fence->ring]; - ib->sync_to[fence->ring] = radeon_fence_later(fence, other); -} - -/** - * radeon_ib_schedule - schedule an IB (Indirect Buffer) on the ring - * - * @rdev: radeon_device pointer - * @ib: IB object to schedule - * @const_ib: Const IB to schedule (SI only) - * - * Schedule an IB on the associated ring (all asics). - * Returns 0 on success, error on failure. - * - * On SI, there are two parallel engines fed from the primary ring, - * the CE (Constant Engine) and the DE (Drawing Engine). Since - * resource descriptors have moved to memory, the CE allows you to - * prime the caches while the DE is updating register state so that - * the resource descriptors will be already in cache when the draw is - * processed. To accomplish this, the userspace driver submits two - * IBs, one for the CE and one for the DE. If there is a CE IB (called - * a CONST_IB), it will be put on the ring prior to the DE IB. Prior - * to SI there was just a DE IB. - */ -int radeon_ib_schedule(struct radeon_device *rdev, struct radeon_ib *ib, - struct radeon_ib *const_ib) -{ - struct radeon_ring *ring = &rdev->ring[ib->ring]; - bool need_sync = false; - int i, r = 0; - - if (!ib->length_dw || !ring->ready) { - /* TODO: Nothings in the ib we should report. */ - dev_err(rdev->dev, "couldn't schedule ib\n"); - return -EINVAL; - } - - /* 64 dwords should be enough for fence too */ - r = radeon_ring_lock(rdev, ring, 64 + RADEON_NUM_RINGS * 8); - if (r) { - dev_err(rdev->dev, "scheduling IB failed (%d).\n", r); - return r; - } - for (i = 0; i < RADEON_NUM_RINGS; ++i) { - struct radeon_fence *fence = ib->sync_to[i]; - if (radeon_fence_need_sync(fence, ib->ring)) { - need_sync = true; - radeon_semaphore_sync_rings(rdev, ib->semaphore, - fence->ring, ib->ring); - radeon_fence_note_sync(fence, ib->ring); - } - } - /* immediately free semaphore when we don't need to sync */ - if (!need_sync) { - radeon_semaphore_free(rdev, &ib->semaphore, NULL); - } - /* if we can't remember our last VM flush then flush now! */ - /* XXX figure out why we have to flush for every IB */ - if (ib->vm /*&& !ib->vm->last_flush*/) { - radeon_ring_vm_flush(rdev, ib->ring, ib->vm); - } - if (const_ib) { - radeon_ring_ib_execute(rdev, const_ib->ring, const_ib); - radeon_semaphore_free(rdev, &const_ib->semaphore, NULL); - } - radeon_ring_ib_execute(rdev, ib->ring, ib); - r = radeon_fence_emit(rdev, &ib->fence, ib->ring); - if (r) { - dev_err(rdev->dev, "failed to emit fence for new IB (%d)\n", r); - radeon_ring_unlock_undo(rdev, ring); - return r; - } - if (const_ib) { - const_ib->fence = radeon_fence_ref(ib->fence); - } - /* we just flushed the VM, remember that */ - if (ib->vm && !ib->vm->last_flush) { - ib->vm->last_flush = radeon_fence_ref(ib->fence); - } - radeon_ring_unlock_commit(rdev, ring); - return 0; -} - -/** - * radeon_ib_pool_init - Init the IB (Indirect Buffer) pool - * - * @rdev: radeon_device pointer - * - * Initialize the suballocator to manage a pool of memory - * for use as IBs (all asics). - * Returns 0 on success, error on failure. - */ -int radeon_ib_pool_init(struct radeon_device *rdev) -{ - int r; - - if (rdev->ib_pool_ready) { - return 0; - } - r = radeon_sa_bo_manager_init(rdev, &rdev->ring_tmp_bo, - RADEON_IB_POOL_SIZE*64*1024, - RADEON_GPU_PAGE_SIZE, - RADEON_GEM_DOMAIN_GTT); - if (r) { - return r; - } - - r = radeon_sa_bo_manager_start(rdev, &rdev->ring_tmp_bo); - if (r) { - return r; - } - - rdev->ib_pool_ready = true; - if (radeon_debugfs_sa_init(rdev)) { - dev_err(rdev->dev, "failed to register debugfs file for SA\n"); - } - return 0; -} - -/** - * radeon_ib_pool_fini - Free the IB (Indirect Buffer) pool - * - * @rdev: radeon_device pointer - * - * Tear down the suballocator managing the pool of memory - * for use as IBs (all asics). - */ -void radeon_ib_pool_fini(struct radeon_device *rdev) -{ - if (rdev->ib_pool_ready) { - radeon_sa_bo_manager_suspend(rdev, &rdev->ring_tmp_bo); - radeon_sa_bo_manager_fini(rdev, &rdev->ring_tmp_bo); - rdev->ib_pool_ready = false; - } -} - -/** - * radeon_ib_ring_tests - test IBs on the rings - * - * @rdev: radeon_device pointer - * - * Test an IB (Indirect Buffer) on each ring. - * If the test fails, disable the ring. - * Returns 0 on success, error if the primary GFX ring - * IB test fails. - */ -int radeon_ib_ring_tests(struct radeon_device *rdev) -{ - unsigned i; - int r; - - for (i = 0; i < RADEON_NUM_RINGS; ++i) { - struct radeon_ring *ring = &rdev->ring[i]; - - if (!ring->ready) - continue; - - r = radeon_ib_test(rdev, i, ring); - if (r) { - ring->ready = false; - - if (i == RADEON_RING_TYPE_GFX_INDEX) { - /* oh, oh, that's really bad */ - DRM_ERROR("radeon: failed testing IB on GFX ring (%d).\n", r); - rdev->accel_working = false; - return r; - - } else { - /* still not good, but we can live with it */ - DRM_ERROR("radeon: failed testing IB on ring %d (%d).\n", i, r); - } - } - } - return 0; -} /* * Rings @@ -315,27 +45,6 @@ static int radeon_debugfs_ring_init(struct radeon_device *rdev, struct radeon_ring *ring); /** - * radeon_ring_write - write a value to the ring - * - * @ring: radeon_ring structure holding ring information - * @v: dword (dw) value to write - * - * Write a value to the requested ring buffer (all asics). - */ -void radeon_ring_write(struct radeon_ring *ring, uint32_t v) -{ -#if DRM_DEBUG_CODE - if (ring->count_dw <= 0) { - DRM_ERROR("radeon: writing more dwords to the ring than expected!\n"); - } -#endif - ring->ring[ring->wptr++] = v; - ring->wptr &= ring->ptr_mask; - ring->count_dw--; - ring->ring_free_dw--; -} - -/** * radeon_ring_supports_scratch_reg - check if the ring supports * writing to scratch registers * @@ -368,19 +77,17 @@ */ void radeon_ring_free_size(struct radeon_device *rdev, struct radeon_ring *ring) { - u32 rptr; + uint32_t rptr = radeon_ring_get_rptr(rdev, ring); - if (rdev->wb.enabled && ring != &rdev->ring[R600_RING_TYPE_UVD_INDEX]) - rptr = le32_to_cpu(rdev->wb.wb[ring->rptr_offs/4]); - else - rptr = RREG32(ring->rptr_reg); - ring->rptr = (rptr & ring->ptr_reg_mask) >> ring->ptr_reg_shift; /* This works because ring_size is a power of 2 */ - ring->ring_free_dw = (ring->rptr + (ring->ring_size / 4)); + ring->ring_free_dw = rptr + (ring->ring_size / 4); ring->ring_free_dw -= ring->wptr; ring->ring_free_dw &= ring->ptr_mask; if (!ring->ring_free_dw) { + /* this is an empty ring */ ring->ring_free_dw = ring->ring_size / 4; + /* update lockup info to avoid false positive */ + radeon_ring_lockup_update(rdev, ring); } } @@ -404,19 +111,13 @@ /* Align requested size with padding so unlock_commit can * pad safely */ radeon_ring_free_size(rdev, ring); - if (ring->ring_free_dw == (ring->ring_size / 4)) { - /* This is an empty ring update lockup info to avoid - * false positive. - */ - radeon_ring_lockup_update(ring); - } ndw = (ndw + ring->align_mask) & ~ring->align_mask; while (ndw > (ring->ring_free_dw - 1)) { radeon_ring_free_size(rdev, ring); if (ndw < ring->ring_free_dw) { break; } - r = radeon_fence_wait_next_locked(rdev, ring->idx); + r = radeon_fence_wait_next(rdev, ring->idx); if (r) return r; } @@ -455,19 +156,30 @@ * * @rdev: radeon_device pointer * @ring: radeon_ring structure holding ring information + * @hdp_flush: Whether or not to perform an HDP cache flush * * Update the wptr (write pointer) to tell the GPU to * execute new commands on the ring buffer (all asics). */ -void radeon_ring_commit(struct radeon_device *rdev, struct radeon_ring *ring) +void radeon_ring_commit(struct radeon_device *rdev, struct radeon_ring *ring, + bool hdp_flush) { + /* If we are emitting the HDP flush via the ring buffer, we need to + * do it before padding. + */ + if (hdp_flush && rdev->asic->ring[ring->idx]->hdp_flush) + rdev->asic->ring[ring->idx]->hdp_flush(rdev, ring); /* We pad to match fetch size */ while (ring->wptr & ring->align_mask) { radeon_ring_write(ring, ring->nop); } - DRM_MEMORYBARRIER(); - WREG32(ring->wptr_reg, (ring->wptr << ring->ptr_reg_shift) & ring->ptr_reg_mask); - (void)RREG32(ring->wptr_reg); + mb(); + /* If we are emitting the HDP flush via MMIO, we need to do it after + * all CPU writes to VRAM finished. + */ + if (hdp_flush && rdev->asic->mmio_hdp_flush) + rdev->asic->mmio_hdp_flush(rdev); + radeon_ring_set_wptr(rdev, ring); } /** @@ -476,12 +188,14 @@ * * @rdev: radeon_device pointer * @ring: radeon_ring structure holding ring information + * @hdp_flush: Whether or not to perform an HDP cache flush * * Call radeon_ring_commit() then unlock the ring (all asics). */ -void radeon_ring_unlock_commit(struct radeon_device *rdev, struct radeon_ring *ring) +void radeon_ring_unlock_commit(struct radeon_device *rdev, struct radeon_ring *ring, + bool hdp_flush) { - radeon_ring_commit(rdev, ring); + radeon_ring_commit(rdev, ring, hdp_flush); mutex_unlock(&rdev->ring_lock); } @@ -511,39 +225,17 @@ } /** - * radeon_ring_force_activity - add some nop packets to the ring - * - * @rdev: radeon_device pointer - * @ring: radeon_ring structure holding ring information - * - * Add some nop packets to the ring to force activity (all asics). - * Used for lockup detection to see if the rptr is advancing. - */ -void radeon_ring_force_activity(struct radeon_device *rdev, struct radeon_ring *ring) -{ - int r; - - radeon_ring_free_size(rdev, ring); - if (ring->rptr == ring->wptr) { - r = radeon_ring_alloc(rdev, ring, 1); - if (!r) { - radeon_ring_write(ring, ring->nop); - radeon_ring_commit(rdev, ring); - } - } -} - -/** * radeon_ring_lockup_update - update lockup variables * * @ring: radeon_ring structure holding ring information * * Update the last rptr value and timestamp (all asics). */ -void radeon_ring_lockup_update(struct radeon_ring *ring) +void radeon_ring_lockup_update(struct radeon_device *rdev, + struct radeon_ring *ring) { - ring->last_rptr = ring->rptr; - ring->last_activity = jiffies; + atomic_set(&ring->last_rptr, radeon_ring_get_rptr(rdev, ring)); + atomic64_set(&ring->last_activity, jiffies_64); } /** @@ -551,42 +243,23 @@ * @rdev: radeon device structure * @ring: radeon_ring structure holding ring information * - * We don't need to initialize the lockup tracking information as we will either - * have CP rptr to a different value of jiffies wrap around which will force - * initialization of the lockup tracking informations. - * - * A possible false positivie is if we get call after while and last_cp_rptr == - * the current CP rptr, even if it's unlikely it might happen. To avoid this - * if the elapsed time since last call is bigger than 2 second than we return - * false and update the tracking information. Due to this the caller must call - * radeon_ring_test_lockup several time in less than 2sec for lockup to be reported - * the fencing code should be cautious about that. - * - * Caller should write to the ring to force CP to do something so we don't get - * false positive when CP is just gived nothing to do. - * - **/ + */ bool radeon_ring_test_lockup(struct radeon_device *rdev, struct radeon_ring *ring) { - unsigned long cjiffies, elapsed; - uint32_t rptr; - - cjiffies = jiffies; - if (!time_after(cjiffies, ring->last_activity)) { - /* likely a wrap around */ - radeon_ring_lockup_update(ring); + uint32_t rptr = radeon_ring_get_rptr(rdev, ring); + uint64_t last = atomic64_read(&ring->last_activity); + uint64_t elapsed; + + if (rptr != atomic_read(&ring->last_rptr)) { + /* ring is still working, no lockup */ + radeon_ring_lockup_update(rdev, ring); return false; } - rptr = RREG32(ring->rptr_reg); - ring->rptr = (rptr & ring->ptr_reg_mask) >> ring->ptr_reg_shift; - if (ring->rptr != ring->last_rptr) { - /* CP is still working no lockup */ - radeon_ring_lockup_update(ring); - return false; - } - elapsed = jiffies_to_msecs(cjiffies - ring->last_activity); + + elapsed = jiffies_to_msecs(jiffies_64 - last); if (radeon_lockup_timeout && elapsed >= radeon_lockup_timeout) { - dev_err(rdev->dev, "GPU lockup CP stall for more than %lumsec\n", elapsed); + dev_err(rdev->dev, "ring %d stalled for more than %llumsec\n", + ring->idx, elapsed); return true; } /* give a chance to the GPU ... */ @@ -641,7 +314,7 @@ } /* and then save the content of the ring */ - *data = kmalloc_array(size, sizeof(uint32_t), GFP_KERNEL); + *data = drm_malloc_ab(size, sizeof(uint32_t)); if (!*data) { mutex_unlock(&rdev->ring_lock); return 0; @@ -682,8 +355,8 @@ radeon_ring_write(ring, data[i]); } - radeon_ring_unlock_commit(rdev, ring); - kfree(data); + radeon_ring_unlock_commit(rdev, ring, false); + drm_free_large(data); return 0; } @@ -694,32 +367,23 @@ * @ring: radeon_ring structure holding ring information * @ring_size: size of the ring * @rptr_offs: offset of the rptr writeback location in the WB buffer - * @rptr_reg: MMIO offset of the rptr register - * @wptr_reg: MMIO offset of the wptr register - * @ptr_reg_shift: bit offset of the rptr/wptr values - * @ptr_reg_mask: bit mask of the rptr/wptr values * @nop: nop packet for this ring * * Initialize the driver information for the selected ring (all asics). * Returns 0 on success, error on failure. */ int radeon_ring_init(struct radeon_device *rdev, struct radeon_ring *ring, unsigned ring_size, - unsigned rptr_offs, unsigned rptr_reg, unsigned wptr_reg, - u32 ptr_reg_shift, u32 ptr_reg_mask, u32 nop) + unsigned rptr_offs, u32 nop) { int r; ring->ring_size = ring_size; ring->rptr_offs = rptr_offs; - ring->rptr_reg = rptr_reg; - ring->wptr_reg = wptr_reg; - ring->ptr_reg_shift = ptr_reg_shift; - ring->ptr_reg_mask = ptr_reg_mask; ring->nop = nop; /* Allocate ring buffer */ if (ring->ring_obj == NULL) { r = radeon_bo_create(rdev, ring->ring_size, PAGE_SIZE, true, - RADEON_GEM_DOMAIN_GTT, + RADEON_GEM_DOMAIN_GTT, 0, NULL, NULL, &ring->ring_obj); if (r) { dev_err(rdev->dev, "(%d) ring create failed\n", r); @@ -753,7 +417,7 @@ if (radeon_debugfs_ring_init(rdev, ring)) { DRM_ERROR("Failed to register debugfs file for rings !\n"); } - radeon_ring_lockup_update(ring); + radeon_ring_lockup_update(rdev, ring); return 0; } @@ -800,34 +464,52 @@ struct radeon_device *rdev = dev->dev_private; int ridx = *(int*)node->info_ent->data; struct radeon_ring *ring = &rdev->ring[ridx]; + + uint32_t rptr, wptr, rptr_next; unsigned count, i, j; - u32 tmp; radeon_ring_free_size(rdev, ring); count = (ring->ring_size / 4) - ring->ring_free_dw; - tmp = RREG32(ring->wptr_reg) >> ring->ptr_reg_shift; - seq_printf(m, "wptr(0x%04x): 0x%08x [%5d]\n", ring->wptr_reg, tmp, tmp); - tmp = RREG32(ring->rptr_reg) >> ring->ptr_reg_shift; - seq_printf(m, "rptr(0x%04x): 0x%08x [%5d]\n", ring->rptr_reg, tmp, tmp); + + wptr = radeon_ring_get_wptr(rdev, ring); + seq_printf(m, "wptr: 0x%08x [%5d]\n", + wptr, wptr); + + rptr = radeon_ring_get_rptr(rdev, ring); + seq_printf(m, "rptr: 0x%08x [%5d]\n", + rptr, rptr); + if (ring->rptr_save_reg) { - seq_printf(m, "rptr next(0x%04x): 0x%08x\n", ring->rptr_save_reg, - RREG32(ring->rptr_save_reg)); - } - seq_printf(m, "driver's copy of the wptr: 0x%08x [%5d]\n", ring->wptr, ring->wptr); - seq_printf(m, "driver's copy of the rptr: 0x%08x [%5d]\n", ring->rptr, ring->rptr); - seq_printf(m, "last semaphore signal addr : 0x%016llx\n", ring->last_semaphore_signal_addr); - seq_printf(m, "last semaphore wait addr : 0x%016llx\n", ring->last_semaphore_wait_addr); + rptr_next = RREG32(ring->rptr_save_reg); + seq_printf(m, "rptr next(0x%04x): 0x%08x [%5d]\n", + ring->rptr_save_reg, rptr_next, rptr_next); + } else + rptr_next = ~0; + + seq_printf(m, "driver's copy of the wptr: 0x%08x [%5d]\n", + ring->wptr, ring->wptr); + seq_printf(m, "last semaphore signal addr : 0x%016llx\n", + ring->last_semaphore_signal_addr); + seq_printf(m, "last semaphore wait addr : 0x%016llx\n", + ring->last_semaphore_wait_addr); seq_printf(m, "%u free dwords in ring\n", ring->ring_free_dw); seq_printf(m, "%u dwords in ring\n", count); + + if (!ring->ring) + return 0; + /* print 8 dw before current rptr as often it's the last executed * packet that is the root issue */ - i = (ring->rptr + ring->ptr_mask + 1 - 32) & ring->ptr_mask; - if (ring->ready) { - for (j = 0; j <= (count + 32); j++) { - seq_printf(m, "r[%5d]=0x%08x\n", i, ring->ring[i]); - i = (i + 1) & ring->ptr_mask; - } + i = (rptr + ring->ptr_mask + 1 - 32) & ring->ptr_mask; + for (j = 0; j <= (count + 32); j++) { + seq_printf(m, "r[%5d]=0x%08x", i, ring->ring[i]); + if (rptr == i) + seq_puts(m, " *"); + if (rptr_next == i) + seq_puts(m, " #"); + seq_puts(m, "\n"); + i = (i + 1) & ring->ptr_mask; } return 0; } @@ -838,6 +520,8 @@ static int radeon_dma1_index = R600_RING_TYPE_DMA_INDEX; static int radeon_dma2_index = CAYMAN_RING_TYPE_DMA1_INDEX; static int r600_uvd_index = R600_RING_TYPE_UVD_INDEX; +static int si_vce1_index = TN_RING_TYPE_VCE1_INDEX; +static int si_vce2_index = TN_RING_TYPE_VCE2_INDEX; static struct drm_info_list radeon_debugfs_ring_info_list[] = { {"radeon_ring_gfx", radeon_debugfs_ring_info, 0, &radeon_gfx_index}, @@ -846,22 +530,8 @@ {"radeon_ring_dma1", radeon_debugfs_ring_info, 0, &radeon_dma1_index}, {"radeon_ring_dma2", radeon_debugfs_ring_info, 0, &radeon_dma2_index}, {"radeon_ring_uvd", radeon_debugfs_ring_info, 0, &r600_uvd_index}, -}; - -static int radeon_debugfs_sa_info(struct seq_file *m, void *data) -{ - struct drm_info_node *node = (struct drm_info_node *) m->private; - struct drm_device *dev = node->minor->dev; - struct radeon_device *rdev = dev->dev_private; - - radeon_sa_bo_dump_debug_info(&rdev->ring_tmp_bo, m); - - return 0; - -} - -static struct drm_info_list radeon_debugfs_sa_list[] = { - {"radeon_sa_info", &radeon_debugfs_sa_info, 0, NULL}, + {"radeon_ring_vce1", radeon_debugfs_ring_info, 0, &si_vce1_index}, + {"radeon_ring_vce2", radeon_debugfs_ring_info, 0, &si_vce2_index}, }; #endif @@ -885,12 +555,3 @@ #endif return 0; } - -static int radeon_debugfs_sa_init(struct radeon_device *rdev) -{ -#if defined(CONFIG_DEBUG_FS) - return radeon_debugfs_add_files(rdev, radeon_debugfs_sa_list, 1); -#else - return 0; -#endif -}