[PATCH v2 1/2] drm/nouveau: Fetch zcull info from device

[Mel Henning <mhenning@darkrefraction.com>]

This information will be exposed to userspace in the following commit.

Signed-off-by: Mel Henning <mhenning@darkrefraction.com>
---
 drivers/gpu/drm/nouveau/include/nvkm/engine/gr.h   | 19 +++++++++++++
 .../gpu/drm/nouveau/nvkm/subdev/gsp/rm/r535/gr.c   |  9 ++++--
 .../gpu/drm/nouveau/nvkm/subdev/gsp/rm/r570/gr.c   | 32 ++++++++++++++++++++--
 .../drm/nouveau/nvkm/subdev/gsp/rm/r570/nvrm/gr.h  | 19 +++++++++++++
 drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/rm.h    |  2 +-
 5 files changed, 75 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/include/nvkm/engine/gr.h b/drivers/gpu/drm/nouveau/include/nvkm/engine/gr.h
index a2333cfe6955..490ce410f6cb 100644
--- a/drivers/gpu/drm/nouveau/include/nvkm/engine/gr.h
+++ b/drivers/gpu/drm/nouveau/include/nvkm/engine/gr.h
@@ -3,9 +3,28 @@
 #define __NVKM_GR_H__
 #include <core/engine.h>
 
+struct nvkm_gr_zcull_info {
+	__u32 width_align_pixels;
+	__u32 height_align_pixels;
+	__u32 pixel_squares_by_aliquots;
+	__u32 aliquot_total;
+	__u32 zcull_region_byte_multiplier;
+	__u32 zcull_region_header_size;
+	__u32 zcull_subregion_header_size;
+	__u32 subregion_count;
+	__u32 subregion_width_align_pixels;
+	__u32 subregion_height_align_pixels;
+
+	__u32 ctxsw_size;
+	__u32 ctxsw_align;
+};
+
 struct nvkm_gr {
 	const struct nvkm_gr_func *func;
 	struct nvkm_engine engine;
+
+	struct nvkm_gr_zcull_info zcull_info;
+	bool has_zcull_info;
 };
 
 u64 nvkm_gr_units(struct nvkm_gr *);
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r535/gr.c b/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r535/gr.c
index ddb57d5e73d6..73844e1e7294 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r535/gr.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r535/gr.c
@@ -249,7 +249,7 @@ r535_gr_get_ctxbuf_info(struct r535_gr *gr, int i,
 }
 
 static int
-r535_gr_get_ctxbufs_info(struct r535_gr *gr)
+r535_gr_get_ctxbufs_and_zcull_info(struct r535_gr *gr)
 {
 	NV2080_CTRL_INTERNAL_STATIC_GR_GET_CONTEXT_BUFFERS_INFO_PARAMS *info;
 	struct nvkm_subdev *subdev = &gr->base.engine.subdev;
@@ -265,6 +265,9 @@ r535_gr_get_ctxbufs_info(struct r535_gr *gr)
 		r535_gr_get_ctxbuf_info(gr, i, &info->engineContextBuffersInfo[0].engine[i]);
 
 	nvkm_gsp_rm_ctrl_done(&gsp->internal.device.subdevice, info);
+
+	gr->base.has_zcull_info = false;
+
 	return 0;
 }
 
@@ -312,7 +315,7 @@ r535_gr_oneinit(struct nvkm_gr *base)
 	 *
 	 * Also build the information that'll be used to create channel contexts.
 	 */
-	ret = rm->api->gr->get_ctxbufs_info(gr);
+	ret = rm->api->gr->get_ctxbufs_and_zcull_info(gr);
 	if (ret)
 		goto done;
 
@@ -352,5 +355,5 @@ r535_gr_dtor(struct nvkm_gr *base)
 
 const struct nvkm_rm_api_gr
 r535_gr = {
-	.get_ctxbufs_info = r535_gr_get_ctxbufs_info,
+	.get_ctxbufs_and_zcull_info = r535_gr_get_ctxbufs_and_zcull_info,
 };
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r570/gr.c b/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r570/gr.c
index b6cced9b8aa1..3e7af2ffece9 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r570/gr.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r570/gr.c
@@ -164,9 +164,10 @@ r570_gr_scrubber_init(struct r535_gr *gr)
 }
 
 static int
-r570_gr_get_ctxbufs_info(struct r535_gr *gr)
+r570_gr_get_ctxbufs_and_zcull_info(struct r535_gr *gr)
 {
 	NV2080_CTRL_INTERNAL_STATIC_GR_GET_CONTEXT_BUFFERS_INFO_PARAMS *info;
+	NV2080_CTRL_GR_GET_ZCULL_INFO_PARAMS *zcull_info;
 	struct nvkm_subdev *subdev = &gr->base.engine.subdev;
 	struct nvkm_gsp *gsp = subdev->device->gsp;
 
@@ -179,13 +180,40 @@ r570_gr_get_ctxbufs_info(struct r535_gr *gr)
 	for (int i = 0; i < ARRAY_SIZE(info->engineContextBuffersInfo[0].engine); i++)
 		r535_gr_get_ctxbuf_info(gr, i, &info->engineContextBuffersInfo[0].engine[i]);
 
+	NV2080_CTRL_INTERNAL_ENGINE_CONTEXT_BUFFER_INFO zcull = info->engineContextBuffersInfo[0]
+		.engine[NV0080_CTRL_FIFO_GET_ENGINE_CONTEXT_PROPERTIES_ENGINE_ID_GRAPHICS_ZCULL];
+	gr->base.zcull_info.ctxsw_size = zcull.size;
+	gr->base.zcull_info.ctxsw_align = zcull.alignment;
+
 	nvkm_gsp_rm_ctrl_done(&gsp->internal.device.subdevice, info);
+
+	zcull_info = nvkm_gsp_rm_ctrl_rd(&gsp->internal.device.subdevice,
+					 NV2080_CTRL_CMD_GR_GET_ZCULL_INFO,
+					 sizeof(*zcull_info));
+	if (WARN_ON(IS_ERR(zcull_info)))
+		return PTR_ERR(zcull_info);
+
+	gr->base.zcull_info.width_align_pixels = zcull_info->widthAlignPixels;
+	gr->base.zcull_info.height_align_pixels = zcull_info->heightAlignPixels;
+	gr->base.zcull_info.pixel_squares_by_aliquots = zcull_info->pixelSquaresByAliquots;
+	gr->base.zcull_info.aliquot_total = zcull_info->aliquotTotal;
+	gr->base.zcull_info.zcull_region_byte_multiplier = zcull_info->zcullRegionByteMultiplier;
+	gr->base.zcull_info.zcull_region_header_size = zcull_info->zcullRegionHeaderSize;
+	gr->base.zcull_info.zcull_subregion_header_size = zcull_info->zcullSubregionHeaderSize;
+	gr->base.zcull_info.subregion_count = zcull_info->subregionCount;
+	gr->base.zcull_info.subregion_width_align_pixels = zcull_info->subregionWidthAlignPixels;
+	gr->base.zcull_info.subregion_height_align_pixels = zcull_info->subregionHeightAlignPixels;
+
+	nvkm_gsp_rm_ctrl_done(&gsp->internal.device.subdevice, zcull_info);
+
+	gr->base.has_zcull_info = true;
+
 	return 0;
 }
 
 const struct nvkm_rm_api_gr
 r570_gr = {
-	.get_ctxbufs_info = r570_gr_get_ctxbufs_info,
+	.get_ctxbufs_and_zcull_info = r570_gr_get_ctxbufs_and_zcull_info,
 	.scrubber.init = r570_gr_scrubber_init,
 	.scrubber.fini = r570_gr_scrubber_fini,
 };
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r570/nvrm/gr.h b/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r570/nvrm/gr.h
index feed1dabd9d2..a7a15a4de9d5 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r570/nvrm/gr.h
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r570/nvrm/gr.h
@@ -76,4 +76,23 @@ typedef struct NV2080_CTRL_INTERNAL_GR_INIT_BUG4208224_WAR_PARAMS {
 } NV2080_CTRL_INTERNAL_GR_INIT_BUG4208224_WAR_PARAMS;
 
 #define NV2080_CTRL_CMD_INTERNAL_KGR_INIT_BUG4208224_WAR (0x20800a46) /* finn: Evaluated from "(FINN_NV20_SUBDEVICE_0_INTERNAL_INTERFACE_ID << 8) | NV2080_CTRL_INTERNAL_KGR_INIT_BUG4208224_WAR_PARAMS_MESSAGE_ID" */
+
+#define NV2080_CTRL_CMD_GR_GET_ZCULL_INFO            (0x20801206U) /* finn: Evaluated from "(FINN_NV20_SUBDEVICE_0_GR_INTERFACE_ID << 8) | NV2080_CTRL_GR_GET_ZCULL_INFO_PARAMS_MESSAGE_ID" */
+
+#define NV2080_CTRL_GR_GET_ZCULL_INFO_PARAMS_SUBREGION_SUPPORTED
+#define NV2080_CTRL_GR_GET_ZCULL_INFO_PARAMS_MESSAGE_ID (0x6U)
+
+typedef struct NV2080_CTRL_GR_GET_ZCULL_INFO_PARAMS {
+    NvU32 widthAlignPixels;
+    NvU32 heightAlignPixels;
+    NvU32 pixelSquaresByAliquots;
+    NvU32 aliquotTotal;
+    NvU32 zcullRegionByteMultiplier;
+    NvU32 zcullRegionHeaderSize;
+    NvU32 zcullSubregionHeaderSize;
+    NvU32 subregionCount;
+    NvU32 subregionWidthAlignPixels;
+    NvU32 subregionHeightAlignPixels;
+} NV2080_CTRL_GR_GET_ZCULL_INFO_PARAMS;
+
 #endif
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/rm.h b/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/rm.h
index 393ea775941f..0fb0e67406c6 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/rm.h
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/rm.h
@@ -124,7 +124,7 @@ struct nvkm_rm_api {
 	} *ce, *nvdec, *nvenc, *nvjpg, *ofa;
 
 	const struct nvkm_rm_api_gr {
-		int (*get_ctxbufs_info)(struct r535_gr *);
+		int (*get_ctxbufs_and_zcull_info)(struct r535_gr *);
 		struct {
 			int (*init)(struct r535_gr *);
 			void (*fini)(struct r535_gr *);

-- 
2.52.0