From: Tom Stellard <thomas.stellard@xxxxxxx>
Also add a new RADEON_INFO query to check that CP DMA packets are
supported on the compute ring.
v2:
- Don't bump kms version, so this patch can be backported to stable
kernels.
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Tom Stellard <thomas.stellard@xxxxxxx>
---
drivers/gpu/drm/radeon/radeon_kms.c | 3 +
drivers/gpu/drm/radeon/si.c | 106 +++++++++++++++++++++---------------
include/uapi/drm/radeon_drm.h | 2 +
3 files changed, 66 insertions(+), 45 deletions(-)
diff --git a/drivers/gpu/drm/radeon/radeon_kms.c b/drivers/gpu/drm/radeon/radeon_kms.c
index 49ff3d1..cc2ca38 100644
--- a/drivers/gpu/drm/radeon/radeon_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_kms.c
@@ -433,6 +433,9 @@ int radeon_info_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
return -EINVAL;
}
break;
+ case RADEON_INFO_SI_CP_DMA_COMPUTE:
+ *value = 1;
+ break;
default:
DRM_DEBUG_KMS("Invalid request %d\n", info->request);
return -EINVAL;
diff --git a/drivers/gpu/drm/radeon/si.c b/drivers/gpu/drm/radeon/si.c
index daa8d2d..8a21132 100644
--- a/drivers/gpu/drm/radeon/si.c
+++ b/drivers/gpu/drm/radeon/si.c
@@ -4083,13 +4083,64 @@ static int si_vm_packet3_ce_check(struct radeon_device *rdev,
return 0;
}
+static int si_vm_packet3_cp_dma_check(u32 *ib, u32 idx)
+{
+ u32 start_reg, reg, i;
+ u32 command = ib[idx + 4];
+ u32 info = ib[idx + 1];
+ u32 idx_value = ib[idx];
+ if (command & PACKET3_CP_DMA_CMD_SAS) {
+ /* src address space is register */
+ if (((info & 0x60000000) >> 29) == 0) {
+ start_reg = idx_value << 2;
+ if (command & PACKET3_CP_DMA_CMD_SAIC) {
+ reg = start_reg;
+ if (!si_vm_reg_valid(reg)) {
+ DRM_ERROR("CP DMA Bad SRC register\n");
+ return -EINVAL;
+ }
+ } else {
+ for (i = 0; i < (command & 0x1fffff); i++) {
+ reg = start_reg + (4 * i);
+ if (!si_vm_reg_valid(reg)) {
+ DRM_ERROR("CP DMA Bad SRC register\n");
+ return -EINVAL;
+ }
+ }
+ }
+ }
+ }
+ if (command & PACKET3_CP_DMA_CMD_DAS) {
+ /* dst address space is register */
+ if (((info & 0x00300000) >> 20) == 0) {
+ start_reg = ib[idx + 2];
+ if (command & PACKET3_CP_DMA_CMD_DAIC) {
+ reg = start_reg;
+ if (!si_vm_reg_valid(reg)) {
+ DRM_ERROR("CP DMA Bad DST register\n");
+ return -EINVAL;
+ }
+ } else {
+ for (i = 0; i < (command & 0x1fffff); i++) {
+ reg = start_reg + (4 * i);
+ if (!si_vm_reg_valid(reg)) {
+ DRM_ERROR("CP DMA Bad DST register\n");
+ return -EINVAL;
+ }
+ }
+ }
+ }
+ }
+ return 0;
+}
+
static int si_vm_packet3_gfx_check(struct radeon_device *rdev,
u32 *ib, struct radeon_cs_packet *pkt)
{
+ int r;
u32 idx = pkt->idx + 1;
u32 idx_value = ib[idx];
u32 start_reg, end_reg, reg, i;
- u32 command, info;
switch (pkt->opcode) {
case PACKET3_NOP:
@@ -4190,50 +4241,9 @@ static int si_vm_packet3_gfx_check(struct radeon_device *rdev,
}
break;
case PACKET3_CP_DMA:
- command = ib[idx + 4];
- info = ib[idx + 1];
- if (command & PACKET3_CP_DMA_CMD_SAS) {
- /* src address space is register */
- if (((info & 0x60000000) >> 29) == 0) {
- start_reg = idx_value << 2;
- if (command & PACKET3_CP_DMA_CMD_SAIC) {
- reg = start_reg;
- if (!si_vm_reg_valid(reg)) {
- DRM_ERROR("CP DMA Bad SRC register\n");
- return -EINVAL;
- }
- } else {
- for (i = 0; i < (command & 0x1fffff); i++) {
- reg = start_reg + (4 * i);
- if (!si_vm_reg_valid(reg)) {
- DRM_ERROR("CP DMA Bad SRC register\n");
- return -EINVAL;
- }
- }
- }
- }
- }
- if (command & PACKET3_CP_DMA_CMD_DAS) {
- /* dst address space is register */
- if (((info & 0x00300000) >> 20) == 0) {
- start_reg = ib[idx + 2];
- if (command & PACKET3_CP_DMA_CMD_DAIC) {
- reg = start_reg;
- if (!si_vm_reg_valid(reg)) {
- DRM_ERROR("CP DMA Bad DST register\n");
- return -EINVAL;
- }
- } else {
- for (i = 0; i < (command & 0x1fffff); i++) {
- reg = start_reg + (4 * i);
- if (!si_vm_reg_valid(reg)) {
- DRM_ERROR("CP DMA Bad DST register\n");
- return -EINVAL;
- }
- }
- }
- }
- }
+ r = si_vm_packet3_cp_dma_check(ib, idx);
+ if (r)
+ return r;
break;
default:
DRM_ERROR("Invalid GFX packet3: 0x%x\n", pkt->opcode);
@@ -4245,6 +4255,7 @@ static int si_vm_packet3_gfx_check(struct radeon_device *rdev,
static int si_vm_packet3_compute_check(struct radeon_device *rdev,
u32 *ib, struct radeon_cs_packet *pkt)
{
+ int r;
u32 idx = pkt->idx + 1;
u32 idx_value = ib[idx];
u32 start_reg, reg, i;
@@ -4317,6 +4328,11 @@ static int si_vm_packet3_compute_check(struct radeon_device *rdev,
return -EINVAL;
}
break;
+ case PACKET3_CP_DMA:
+ r = si_vm_packet3_cp_dma_check(ib, idx);
+ if (r)
+ return r;
+ break;
default:
DRM_ERROR("Invalid Compute packet3: 0x%x\n", pkt->opcode);
return -EINVAL;
diff --git a/include/uapi/drm/radeon_drm.h b/include/uapi/drm/radeon_drm.h
index 321d4ac..fa8b3ad 100644
--- a/include/uapi/drm/radeon_drm.h
+++ b/include/uapi/drm/radeon_drm.h
@@ -979,6 +979,8 @@ struct drm_radeon_cs {
#define RADEON_INFO_RING_WORKING 0x15
/* SI tile mode array */
#define RADEON_INFO_SI_TILE_MODE_ARRAY 0x16
+/* query if CP DMA is supported on the compute ring */
+#define RADEON_INFO_SI_CP_DMA_COMPUTE 0x17
struct drm_radeon_info {
--
1.8.1.5
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