[PATCH] drm/radeon/si: Add support for CP DMA to CS checker for compute
Alex Deucher
alexdeucher at gmail.com
Fri Aug 16 12:39:16 PDT 2013
On Fri, Aug 16, 2013 at 3:16 PM, Tom Stellard <tom at stellard.net> wrote:
> From: Tom Stellard <thomas.stellard at amd.com>
>
> Also add a new RADEON_INFO query to check that CP DMA packets are
> supported on the compute ring.
>
> Signed-off-by: Tom Stellard <thomas.stellard at amd.com>
> ---
> drivers/gpu/drm/radeon/radeon_drv.c | 3 +-
> drivers/gpu/drm/radeon/radeon_kms.c | 3 +
> drivers/gpu/drm/radeon/si.c | 106 +++++++++++++++++++++---------------
> include/uapi/drm/radeon_drm.h | 2 +
> 4 files changed, 68 insertions(+), 46 deletions(-)
>
> diff --git a/drivers/gpu/drm/radeon/radeon_drv.c b/drivers/gpu/drm/radeon/radeon_drv.c
> index 29876b1..c2c6da1 100644
> --- a/drivers/gpu/drm/radeon/radeon_drv.c
> +++ b/drivers/gpu/drm/radeon/radeon_drv.c
> @@ -75,9 +75,10 @@
> * 2.32.0 - new info request for rings working
> * 2.33.0 - Add SI tiling mode array query
> * 2.34.0 - Add CIK tiling mode array query
> + * 2.35.0 - Add SI CP DMA compute query
> */
> #define KMS_DRIVER_MAJOR 2
> -#define KMS_DRIVER_MINOR 34
> +#define KMS_DRIVER_MINOR 35
Skip the version bump if we want this to go to stable kernels. We can
query the info ioctl for the cp_dma_compute arg and if it's a kernel
where it doesn't exist, it'll just fail. if it exists the ioctl will
succeed. If we don't want to send this to stable, just bump the
version and skip the info ioctl.
Alex
> #define KMS_DRIVER_PATCHLEVEL 0
> int radeon_driver_load_kms(struct drm_device *dev, unsigned long flags);
> int radeon_driver_unload_kms(struct drm_device *dev);
> 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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