diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 27 |
1 files changed, 11 insertions, 16 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c index 5230dc1232c9..7592d4b3f28f 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c @@ -60,6 +60,8 @@ #include "amdgpu_ras.h" #include "bif/bif_4_1_d.h" +#define AMDGPU_TTM_VRAM_MAX_DW_READ (size_t)128 + static int amdgpu_map_buffer(struct ttm_buffer_object *bo, struct ttm_mem_reg *mem, unsigned num_pages, uint64_t offset, unsigned window, @@ -2288,27 +2290,20 @@ static ssize_t amdgpu_ttm_vram_read(struct file *f, char __user *buf, if (*pos >= adev->gmc.mc_vram_size) return -ENXIO; + size = min(size, (size_t)(adev->gmc.mc_vram_size - *pos)); while (size) { - unsigned long flags; - uint32_t value; - - if (*pos >= adev->gmc.mc_vram_size) - return result; - - spin_lock_irqsave(&adev->mmio_idx_lock, flags); - WREG32_NO_KIQ(mmMM_INDEX, ((uint32_t)*pos) | 0x80000000); - WREG32_NO_KIQ(mmMM_INDEX_HI, *pos >> 31); - value = RREG32_NO_KIQ(mmMM_DATA); - spin_unlock_irqrestore(&adev->mmio_idx_lock, flags); + size_t bytes = min(size, AMDGPU_TTM_VRAM_MAX_DW_READ * 4); + uint32_t value[AMDGPU_TTM_VRAM_MAX_DW_READ]; - r = put_user(value, (uint32_t *)buf); + amdgpu_device_vram_access(adev, *pos, value, bytes, false); + r = copy_to_user(buf, value, bytes); if (r) return r; - result += 4; - buf += 4; - *pos += 4; - size -= 4; + result += bytes; + buf += bytes; + *pos += bytes; + size -= bytes; } return result; |