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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>
This commit is contained in:
Alex Deucher 2012-12-14 00:23:06 -05:00
parent 8696e33f06
commit 9d89d78e3a
1 changed files with 24 additions and 0 deletions
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24
drivers/gpu/drm/radeon/evergreen_cs.c
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@ -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) {