[PATCH 3/4] drm/radeon: add VM CS parser support for async DMA on cayman/TN/SI
alexdeucher at gmail.com
alexdeucher at gmail.com
Thu Dec 13 09:57:50 PST 2012
From: Alex Deucher <alexander.deucher at amd.com>
Allows us to use async DMA from userspace.
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
drivers/gpu/drm/radeon/evergreen_cs.c | 111 +++++++++++++++++++++++++++++++++
drivers/gpu/drm/radeon/radeon_asic.c | 6 ++
drivers/gpu/drm/radeon/radeon_asic.h | 1 +
3 files changed, 118 insertions(+), 0 deletions(-)
diff --git a/drivers/gpu/drm/radeon/evergreen_cs.c b/drivers/gpu/drm/radeon/evergreen_cs.c
index adfc66f..fefb2cc 100644
--- a/drivers/gpu/drm/radeon/evergreen_cs.c
+++ b/drivers/gpu/drm/radeon/evergreen_cs.c
@@ -3543,3 +3543,114 @@ 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;
+}
diff --git a/drivers/gpu/drm/radeon/radeon_asic.c b/drivers/gpu/drm/radeon/radeon_asic.c
index ac1d570..596bcbe 100644
--- a/drivers/gpu/drm/radeon/radeon_asic.c
+++ b/drivers/gpu/drm/radeon/radeon_asic.c
@@ -1484,6 +1484,7 @@ static struct radeon_asic cayman_asic = {
},
[R600_RING_TYPE_DMA_INDEX] = {
.ib_execute = &cayman_dma_ring_ib_execute,
+ .ib_parse = &evergreen_dma_ib_parse,
.emit_fence = &evergreen_dma_fence_ring_emit,
.emit_semaphore = &r600_dma_semaphore_ring_emit,
.cs_parse = &evergreen_dma_cs_parse,
@@ -1494,6 +1495,7 @@ static struct radeon_asic cayman_asic = {
},
[CAYMAN_RING_TYPE_DMA1_INDEX] = {
.ib_execute = &cayman_dma_ring_ib_execute,
+ .ib_parse = &evergreen_dma_ib_parse,
.emit_fence = &evergreen_dma_fence_ring_emit,
.emit_semaphore = &r600_dma_semaphore_ring_emit,
.cs_parse = &evergreen_dma_cs_parse,
@@ -1609,6 +1611,7 @@ static struct radeon_asic trinity_asic = {
},
[R600_RING_TYPE_DMA_INDEX] = {
.ib_execute = &cayman_dma_ring_ib_execute,
+ .ib_parse = &evergreen_dma_ib_parse,
.emit_fence = &evergreen_dma_fence_ring_emit,
.emit_semaphore = &r600_dma_semaphore_ring_emit,
.cs_parse = &evergreen_dma_cs_parse,
@@ -1619,6 +1622,7 @@ static struct radeon_asic trinity_asic = {
},
[CAYMAN_RING_TYPE_DMA1_INDEX] = {
.ib_execute = &cayman_dma_ring_ib_execute,
+ .ib_parse = &evergreen_dma_ib_parse,
.emit_fence = &evergreen_dma_fence_ring_emit,
.emit_semaphore = &r600_dma_semaphore_ring_emit,
.cs_parse = &evergreen_dma_cs_parse,
@@ -1734,6 +1738,7 @@ static struct radeon_asic si_asic = {
},
[R600_RING_TYPE_DMA_INDEX] = {
.ib_execute = &cayman_dma_ring_ib_execute,
+ .ib_parse = &evergreen_dma_ib_parse,
.emit_fence = &evergreen_dma_fence_ring_emit,
.emit_semaphore = &r600_dma_semaphore_ring_emit,
.cs_parse = NULL,
@@ -1744,6 +1749,7 @@ static struct radeon_asic si_asic = {
},
[CAYMAN_RING_TYPE_DMA1_INDEX] = {
.ib_execute = &cayman_dma_ring_ib_execute,
+ .ib_parse = &evergreen_dma_ib_parse,
.emit_fence = &evergreen_dma_fence_ring_emit,
.emit_semaphore = &r600_dma_semaphore_ring_emit,
.cs_parse = NULL,
diff --git a/drivers/gpu/drm/radeon/radeon_asic.h b/drivers/gpu/drm/radeon/radeon_asic.h
index d2ac646..5f4882c 100644
--- a/drivers/gpu/drm/radeon/radeon_asic.h
+++ b/drivers/gpu/drm/radeon/radeon_asic.h
@@ -473,6 +473,7 @@ void cayman_vm_set_page(struct radeon_device *rdev, uint64_t pe,
uint64_t addr, unsigned count,
uint32_t incr, uint32_t flags);
int evergreen_ib_parse(struct radeon_device *rdev, struct radeon_ib *ib);
+int evergreen_dma_ib_parse(struct radeon_device *rdev, struct radeon_ib *ib);
void cayman_dma_ring_ib_execute(struct radeon_device *rdev,
struct radeon_ib *ib);
bool cayman_dma_is_lockup(struct radeon_device *rdev, struct radeon_ring *ring);
--
1.7.7.5
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