diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_ip.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_ip.c | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ip.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ip.c index 6aa54156bbc9..65505bc50399 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ip.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ip.c @@ -409,3 +409,157 @@ bool amdgpu_device_ip_is_valid(struct amdgpu_device *adev, return false; } + +/** + * amdgpu_ip_from_ring() - Find IP block type corresponding to ring type. + * + * @ring_type: The ring type whose IP block you are looking for. + */ +static enum amd_ip_block_type amdgpu_ip_from_ring(const enum amdgpu_ring_type ring_type) +{ + switch (ring_type) { + case AMDGPU_RING_TYPE_GFX: + case AMDGPU_RING_TYPE_COMPUTE: + return AMD_IP_BLOCK_TYPE_GFX; + + case AMDGPU_RING_TYPE_SDMA: + return AMD_IP_BLOCK_TYPE_SDMA; + + case AMDGPU_RING_TYPE_UVD: + case AMDGPU_RING_TYPE_UVD_ENC: + return AMD_IP_BLOCK_TYPE_UVD; + + case AMDGPU_RING_TYPE_VCE: + return AMD_IP_BLOCK_TYPE_VCE; + + case AMDGPU_RING_TYPE_VCN_DEC: + case AMDGPU_RING_TYPE_VCN_ENC: + return AMD_IP_BLOCK_TYPE_VCN; + + case AMDGPU_RING_TYPE_VCN_JPEG: + return AMD_IP_BLOCK_TYPE_JPEG; + + case AMDGPU_RING_TYPE_VPE: + return AMD_IP_BLOCK_TYPE_VPE; + + default: + return AMD_IP_BLOCK_TYPE_NUM; + } +} + +/** + * amdgpu_ring_mask_from_ip() - Find mask of ring types corresponding to an IP block type. + * + * @ip_type: The IP block type whose rings you are looking for. + */ +static u32 amdgpu_ring_mask_from_ip(const enum amd_ip_block_type ip_type) +{ + switch (ip_type) { + case AMD_IP_BLOCK_TYPE_GFX: + return BIT(AMDGPU_RING_TYPE_GFX) | BIT(AMDGPU_RING_TYPE_COMPUTE); + + case AMD_IP_BLOCK_TYPE_SDMA: + return BIT(AMDGPU_RING_TYPE_SDMA); + + case AMD_IP_BLOCK_TYPE_UVD: + return BIT(AMDGPU_RING_TYPE_UVD) | BIT(AMDGPU_RING_TYPE_UVD_ENC); + + case AMD_IP_BLOCK_TYPE_VCE: + return BIT(AMD_IP_BLOCK_TYPE_VCE); + + case AMD_IP_BLOCK_TYPE_VCN: + return BIT(AMDGPU_RING_TYPE_VCN_DEC) | BIT(AMDGPU_RING_TYPE_VCN_ENC); + + case AMD_IP_BLOCK_TYPE_JPEG: + return BIT(AMDGPU_RING_TYPE_VCN_JPEG); + + case AMD_IP_BLOCK_TYPE_VPE: + return BIT(AMDGPU_RING_TYPE_VPE); + + default: + return 0; + } +} + +/** + * amdgpu_filter_rings() - Filter rings according to a mask. + * + * @adev: amdgpu_device pointer + * @ring_type_mask: Mask of ring types you are looking for + * @out_rings: Array of rings which is going to be filled + * @out_num_rings: Number of rings which were filtered + */ +static void amdgpu_filter_rings(struct amdgpu_device *adev, const u32 ring_type_mask, + struct amdgpu_ring **out_rings, u32 *out_num_rings) +{ + u32 num_rings = 0; + int i; + + for (i = 0; i < adev->num_rings; ++i) { + if (BIT(adev->rings[i]->funcs->type) & ring_type_mask) + out_rings[num_rings++] = adev->rings[i]; + } + + *out_num_rings = num_rings; +} + +/** + * amdgpu_device_ip_soft_reset() - Perform a graceful soft reset on an IP block. + * + * @guilty_ring: The ring which is guilty of causing a reset. + * @guilty_fence: The fence which didn't signal. + * + * IP block soft reset is used when attempting to recover + * from a GPU hang in a situation where a more fine grained + * reset type isn't available or didn't work. This effectively + * resets all rings that belong to the same device IP block + * and re-initializes the device IP block. + * + * The reset is handled gracefully, meaning that we try to + * minimize collateral damage (ie. avoid rejecting non-guilty jobs) + * as well as back up and restore the contents of all rings + * so that the system can move on from the hang. + */ +int amdgpu_device_ip_soft_reset(struct amdgpu_ring *guilty_ring, + struct amdgpu_fence *guilty_fence) +{ + struct amdgpu_device *adev = guilty_ring->adev; + struct amdgpu_ring *rings[AMDGPU_MAX_RINGS]; + struct amdgpu_ip_block *ip_block; + enum amd_ip_block_type ip_type; + u32 num_rings, ring_type_mask; + int r; + + ip_type = amdgpu_ip_from_ring(guilty_ring->funcs->type); + ip_block = amdgpu_device_ip_get_ip_block(adev, ip_type); + + if (!ip_block || !ip_block->version->funcs->soft_reset) { + dev_warn(adev->dev, "IP block soft reset not supported on %s\n", + ip_block->version->funcs->name); + return -EOPNOTSUPP; + } + + dev_err(adev->dev, "Starting %s IP block soft reset\n", + ip_block->version->funcs->name); + + ring_type_mask = amdgpu_ring_mask_from_ip(ip_type); + amdgpu_filter_rings(adev, ring_type_mask, rings, &num_rings); + + amdgpu_device_lock_reset_domain(adev->reset_domain); + amdgpu_multi_ring_reset_helper_begin(rings, num_rings, guilty_ring, guilty_fence); + + r = ip_block->version->funcs->soft_reset(ip_block); + + r = amdgpu_multi_ring_reset_helper_end(rings, num_rings, guilty_ring, r); + amdgpu_device_unlock_reset_domain(adev->reset_domain); + + if (r) { + dev_err(adev->dev, "Failed %s IP block soft reset: %d\n", + ip_block->version->funcs->name, r); + return r; + } + + dev_err(adev->dev, "Successful %s IP block soft reset\n", + ip_block->version->funcs->name); + return 0; +} |