From: Alex Deucher Date: Fri, 28 Jul 2017 16:14:15 +0000 (-0400) Subject: drm/amdgpu: use 256 bit buffers for all wb allocations (v2) X-Git-Tag: v4.14-rc1~8^2~28^2~22 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=97407b63ea605c12f328ce46b155026080b34246;p=platform%2Fkernel%2Flinux-rpi.git drm/amdgpu: use 256 bit buffers for all wb allocations (v2) May waste a bit of memory, but simplifies the interface significantly. v2: convert internal accounting to use 256bit slots Reviewed-by: Christian König Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h index d492ff7..19ee2a4 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h @@ -1131,10 +1131,6 @@ struct amdgpu_wb { int amdgpu_wb_get(struct amdgpu_device *adev, u32 *wb); void amdgpu_wb_free(struct amdgpu_device *adev, u32 wb); -int amdgpu_wb_get_64bit(struct amdgpu_device *adev, u32 *wb); -int amdgpu_wb_get_256bit(struct amdgpu_device *adev, u32 *wb); -void amdgpu_wb_free_64bit(struct amdgpu_device *adev, u32 wb); -void amdgpu_wb_free_256bit(struct amdgpu_device *adev, u32 wb); void amdgpu_get_pcie_info(struct amdgpu_device *adev); diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c index d33e106..a6f6cb0 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c @@ -504,7 +504,8 @@ static int amdgpu_wb_init(struct amdgpu_device *adev) int r; if (adev->wb.wb_obj == NULL) { - r = amdgpu_bo_create_kernel(adev, AMDGPU_MAX_WB * sizeof(uint32_t), + /* AMDGPU_MAX_WB * sizeof(uint32_t) * 8 = AMDGPU_MAX_WB 256bit slots */ + r = amdgpu_bo_create_kernel(adev, AMDGPU_MAX_WB * sizeof(uint32_t) * 8, PAGE_SIZE, AMDGPU_GEM_DOMAIN_GTT, &adev->wb.wb_obj, &adev->wb.gpu_addr, (void **)&adev->wb.wb); @@ -535,47 +536,10 @@ static int amdgpu_wb_init(struct amdgpu_device *adev) int amdgpu_wb_get(struct amdgpu_device *adev, u32 *wb) { unsigned long offset = find_first_zero_bit(adev->wb.used, adev->wb.num_wb); - if (offset < adev->wb.num_wb) { - __set_bit(offset, adev->wb.used); - *wb = offset; - return 0; - } else { - return -EINVAL; - } -} -/** - * amdgpu_wb_get_64bit - Allocate a wb entry - * - * @adev: amdgpu_device pointer - * @wb: wb index - * - * Allocate a wb slot for use by the driver (all asics). - * Returns 0 on success or -EINVAL on failure. - */ -int amdgpu_wb_get_64bit(struct amdgpu_device *adev, u32 *wb) -{ - unsigned long offset = bitmap_find_next_zero_area_off(adev->wb.used, - adev->wb.num_wb, 0, 2, 7, 0); - if ((offset + 1) < adev->wb.num_wb) { + if (offset < adev->wb.num_wb) { __set_bit(offset, adev->wb.used); - __set_bit(offset + 1, adev->wb.used); - *wb = offset; - return 0; - } else { - return -EINVAL; - } -} - -int amdgpu_wb_get_256bit(struct amdgpu_device *adev, u32 *wb) -{ - int i = 0; - unsigned long offset = bitmap_find_next_zero_area_off(adev->wb.used, - adev->wb.num_wb, 0, 8, 63, 0); - if ((offset + 7) < adev->wb.num_wb) { - for (i = 0; i < 8; i++) - __set_bit(offset + i, adev->wb.used); - *wb = offset; + *wb = offset * 8; /* convert to dw offset */ return 0; } else { return -EINVAL; @@ -597,39 +561,6 @@ void amdgpu_wb_free(struct amdgpu_device *adev, u32 wb) } /** - * amdgpu_wb_free_64bit - Free a wb entry - * - * @adev: amdgpu_device pointer - * @wb: wb index - * - * Free a wb slot allocated for use by the driver (all asics) - */ -void amdgpu_wb_free_64bit(struct amdgpu_device *adev, u32 wb) -{ - if ((wb + 1) < adev->wb.num_wb) { - __clear_bit(wb, adev->wb.used); - __clear_bit(wb + 1, adev->wb.used); - } -} - -/** - * amdgpu_wb_free_256bit - Free a wb entry - * - * @adev: amdgpu_device pointer - * @wb: wb index - * - * Free a wb slot allocated for use by the driver (all asics) - */ -void amdgpu_wb_free_256bit(struct amdgpu_device *adev, u32 wb) -{ - int i = 0; - - if ((wb + 7) < adev->wb.num_wb) - for (i = 0; i < 8; i++) - __clear_bit(wb + i, adev->wb.used); -} - -/** * amdgpu_vram_location - try to find VRAM location * @adev: amdgpu device structure holding all necessary informations * @mc: memory controller structure holding memory informations diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c index 3874be8..704475674 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c @@ -184,47 +184,22 @@ int amdgpu_ring_init(struct amdgpu_device *adev, struct amdgpu_ring *ring, return r; } - if (ring->funcs->support_64bit_ptrs) { - r = amdgpu_wb_get_64bit(adev, &ring->rptr_offs); - if (r) { - dev_err(adev->dev, "(%d) ring rptr_offs wb alloc failed\n", r); - return r; - } - - r = amdgpu_wb_get_64bit(adev, &ring->wptr_offs); - if (r) { - dev_err(adev->dev, "(%d) ring wptr_offs wb alloc failed\n", r); - return r; - } - - } else { - r = amdgpu_wb_get(adev, &ring->rptr_offs); - if (r) { - dev_err(adev->dev, "(%d) ring rptr_offs wb alloc failed\n", r); - return r; - } - - r = amdgpu_wb_get(adev, &ring->wptr_offs); - if (r) { - dev_err(adev->dev, "(%d) ring wptr_offs wb alloc failed\n", r); - return r; - } - + r = amdgpu_wb_get(adev, &ring->rptr_offs); + if (r) { + dev_err(adev->dev, "(%d) ring rptr_offs wb alloc failed\n", r); + return r; } - if (amdgpu_sriov_vf(adev) && ring->funcs->type == AMDGPU_RING_TYPE_GFX) { - r = amdgpu_wb_get_256bit(adev, &ring->fence_offs); - if (r) { - dev_err(adev->dev, "(%d) ring fence_offs wb alloc failed\n", r); - return r; - } + r = amdgpu_wb_get(adev, &ring->wptr_offs); + if (r) { + dev_err(adev->dev, "(%d) ring wptr_offs wb alloc failed\n", r); + return r; + } - } else { - r = amdgpu_wb_get(adev, &ring->fence_offs); - if (r) { - dev_err(adev->dev, "(%d) ring fence_offs wb alloc failed\n", r); - return r; - } + r = amdgpu_wb_get(adev, &ring->fence_offs); + if (r) { + dev_err(adev->dev, "(%d) ring fence_offs wb alloc failed\n", r); + return r; } r = amdgpu_wb_get(adev, &ring->cond_exe_offs); @@ -286,19 +261,11 @@ void amdgpu_ring_fini(struct amdgpu_ring *ring) { ring->ready = false; - if (ring->funcs->support_64bit_ptrs) { - amdgpu_wb_free_64bit(ring->adev, ring->rptr_offs); - amdgpu_wb_free_64bit(ring->adev, ring->wptr_offs); - } else { - amdgpu_wb_free(ring->adev, ring->rptr_offs); - amdgpu_wb_free(ring->adev, ring->wptr_offs); - } + amdgpu_wb_free(ring->adev, ring->rptr_offs); + amdgpu_wb_free(ring->adev, ring->wptr_offs); amdgpu_wb_free(ring->adev, ring->cond_exe_offs); - if (amdgpu_sriov_vf(ring->adev) && ring->funcs->type == AMDGPU_RING_TYPE_GFX) - amdgpu_wb_free_256bit(ring->adev, ring->fence_offs); - else - amdgpu_wb_free(ring->adev, ring->fence_offs); + amdgpu_wb_free(ring->adev, ring->fence_offs); amdgpu_bo_free_kernel(&ring->ring_obj, &ring->gpu_addr,