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| author | Alex Deucher <alexander.deucher@amd.com> | 2012-12-14 00:23:06 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2012-12-14 10:45:28 -0500 |
| commit | 9d89d78e3a20980205966fba6345645547e59ceb (patch) | |
| tree | 723101dfc37771a3db6a9df8186278cf15a9390b | |
| parent | 8696e33f06b0c52195152cc6a0e3d52233f486c1 (diff) | |
| download | linux-9d89d78e3a20980205966fba6345645547e59ceb.tar.bz2 | |
drm/radeon: add more pedantic checks in the CP DMA checker
non-mem-to-mem transfers require dw aligned byte count.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
| -rw-r--r-- | drivers/gpu/drm/radeon/evergreen_cs.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/evergreen_cs.c b/drivers/gpu/drm/radeon/evergreen_cs.c index 9a9d3ae6c188..74c6b42d2597 100644 --- a/drivers/gpu/drm/radeon/evergreen_cs.c +++ b/drivers/gpu/drm/radeon/evergreen_cs.c @@ -2256,6 +2256,18 @@ static int evergreen_packet3_check(struct radeon_cs_parser *p, command = radeon_get_ib_value(p, idx+4); size = command & 0x1fffff; info = radeon_get_ib_value(p, idx+1); + if ((((info & 0x60000000) >> 29) != 0) || /* src = GDS or DATA */ + (((info & 0x00300000) >> 20) != 0) || /* dst = GDS */ + ((((info & 0x00300000) >> 20) == 0) && + (command & PACKET3_CP_DMA_CMD_DAS)) || /* dst = register */ + ((((info & 0x60000000) >> 29) == 0) && + (command & PACKET3_CP_DMA_CMD_SAS))) { /* src = register */ + /* non mem to mem copies requires dw aligned count */ + if (size % 4) { + DRM_ERROR("CP DMA command requires dw count alignment\n"); + return -EINVAL; + } + } if (command & PACKET3_CP_DMA_CMD_SAS) { /* src address space is register */ /* GDS is ok */ @@ -3472,6 +3484,18 @@ static int evergreen_vm_packet3_check(struct radeon_device *rdev, case PACKET3_CP_DMA: command = ib[idx + 4]; info = ib[idx + 1]; + if ((((info & 0x60000000) >> 29) != 0) || /* src = GDS or DATA */ + (((info & 0x00300000) >> 20) != 0) || /* dst = GDS */ + ((((info & 0x00300000) >> 20) == 0) && + (command & PACKET3_CP_DMA_CMD_DAS)) || /* dst = register */ + ((((info & 0x60000000) >> 29) == 0) && + (command & PACKET3_CP_DMA_CMD_SAS))) { /* src = register */ + /* non mem to mem copies requires dw aligned count */ + if ((command & 0x1fffff) % 4) { + DRM_ERROR("CP DMA command requires dw count alignment\n"); + return -EINVAL; + } + } if (command & PACKET3_CP_DMA_CMD_SAS) { /* src address space is register */ if (((info & 0x60000000) >> 29) == 0) { |