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author | Alex Deucher | 2012-12-13 18:17:38 +0100 |
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committer | Alex Deucher | 2012-12-14 16:45:26 +0100 |
commit | cd459e525f4faeefa0bf78e1bcba3e04496b2cb5 (patch) | |
tree | ca8d6d1d855694ce843bdd83d7e48cd00842838f /drivers/gpu/drm/radeon/evergreen_cs.c | |
parent | drm/radeon/kms: add evergreen/cayman CS parser for async DMA (v2) (diff) | |
download | kernel-qcow2-linux-cd459e525f4faeefa0bf78e1bcba3e04496b2cb5.tar.gz kernel-qcow2-linux-cd459e525f4faeefa0bf78e1bcba3e04496b2cb5.tar.xz kernel-qcow2-linux-cd459e525f4faeefa0bf78e1bcba3e04496b2cb5.zip |
drm/radeon: add VM CS parser support for async DMA on cayman/TN/SI
Allows us to use async DMA from userspace.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/evergreen_cs.c')
-rw-r--r-- | drivers/gpu/drm/radeon/evergreen_cs.c | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/evergreen_cs.c b/drivers/gpu/drm/radeon/evergreen_cs.c index 0a1ec4e6f15e..9a9d3ae6c188 100644 --- a/drivers/gpu/drm/radeon/evergreen_cs.c +++ b/drivers/gpu/drm/radeon/evergreen_cs.c @@ -3556,3 +3556,114 @@ int evergreen_ib_parse(struct radeon_device *rdev, struct radeon_ib *ib) return ret; } + +/** + * evergreen_dma_ib_parse() - parse the DMA IB for VM + * @rdev: radeon_device pointer + * @ib: radeon_ib pointer + * + * Parses the DMA IB from the VM CS ioctl + * checks for errors. (Cayman-SI) + * Returns 0 for success and an error on failure. + **/ +int evergreen_dma_ib_parse(struct radeon_device *rdev, struct radeon_ib *ib) +{ + u32 idx = 0; + u32 header, cmd, count, tiled, new_cmd, misc; + + do { + header = ib->ptr[idx]; + cmd = GET_DMA_CMD(header); + count = GET_DMA_COUNT(header); + tiled = GET_DMA_T(header); + new_cmd = GET_DMA_NEW(header); + misc = GET_DMA_MISC(header); + + switch (cmd) { + case DMA_PACKET_WRITE: + if (tiled) + idx += count + 7; + else + idx += count + 3; + break; + case DMA_PACKET_COPY: + if (tiled) { + if (new_cmd) { + switch (misc) { + case 0: + /* L2T, frame to fields */ + idx += 10; + break; + case 1: + /* L2T, T2L partial */ + idx += 12; + break; + case 3: + /* L2T, broadcast */ + idx += 10; + break; + case 4: + /* L2T, T2L */ + idx += 9; + break; + case 5: + /* T2T partial */ + idx += 13; + break; + case 7: + /* L2T, broadcast */ + idx += 10; + break; + default: + DRM_ERROR("bad DMA_PACKET_COPY misc %u\n", misc); + return -EINVAL; + } + } else { + switch (misc) { + case 0: + idx += 9; + break; + default: + DRM_ERROR("bad DMA_PACKET_COPY misc %u\n", misc); + return -EINVAL; + } + } + } else { + if (new_cmd) { + switch (misc) { + case 0: + /* L2L, byte */ + idx += 5; + break; + case 1: + /* L2L, partial */ + idx += 9; + break; + case 4: + /* L2L, dw, broadcast */ + idx += 7; + break; + default: + DRM_ERROR("bad DMA_PACKET_COPY misc %u\n", misc); + return -EINVAL; + } + } else { + /* L2L, dw */ + idx += 5; + } + } + break; + case DMA_PACKET_CONSTANT_FILL: + idx += 4; + break; + case DMA_PACKET_NOP: + idx += 1; + break; + default: + DRM_ERROR("Unknown packet type %d at %d !\n", cmd, idx); + return -EINVAL; + } + } while (idx < ib->length_dw); + + return 0; +} |