gpu: nvgpu: Add class numbers to characteristics

Some kernel APIs rely on user space knowing class numbers. Allow
querying the numbers from kernel.

Bug 1567274

Change-Id: Idec2fe8ee983ee74bcbf9dfc98f71bbcc1492cfb
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/594402

drivers/gpu/nvgpu/gk20a/gk20a.h

@@ -700,7 +700,8 @@ enum {
 	FERMI_TWOD_A              = 0x902D,
 	KEPLER_COMPUTE_A          = 0xA0C0,
 	KEPLER_INLINE_TO_MEMORY_A = 0xA040,
-	KEPLER_DMA_COPY_A         = 0xA0B5, /*not sure about this one*/
+	KEPLER_DMA_COPY_A         = 0xA0B5,
+	KEPLER_CHANNEL_GPFIFO_C   = 0xA26F,
 };
 
 static inline int support_gk20a_pmu(struct platform_device *dev)

drivers/gpu/nvgpu/gk20a/hal.c

@@ -27,16 +27,16 @@ int gpu_init_hal(struct gk20a *g)
 	switch (ver) {
 	case GK20A_GPUID_GK20A:
 		gk20a_dbg_info("gk20a detected");
-		gk20a_init_hal(&g->ops);
+		gk20a_init_hal(g);
 		break;
 	case GK20A_GPUID_GM20B:
 		gk20a_dbg_info("gm20b detected");
-		if (gm20b_init_hal(&g->ops))
+		if (gm20b_init_hal(g))
 			return -ENODEV;
 		break;
 #if defined(CONFIG_ARCH_TEGRA_18x_SOC)
 	case TEGRA_18x_GPUID:
-		if (TEGRA_18x_GPUID_HAL(&g->ops))
+		if (TEGRA_18x_GPUID_HAL(g))
 			return -ENODEV;
 		break;
 #endif

drivers/gpu/nvgpu/gk20a/hal_gk20a.c

@@ -45,8 +45,11 @@ static struct gpu_ops gk20a_ops = {
 	}
 };
 
-int gk20a_init_hal(struct gpu_ops *gops)
+int gk20a_init_hal(struct gk20a *g)
 {
+	struct gpu_ops *gops = &g->ops;
+	struct nvgpu_gpu_characteristics *c = &g->gpu_characteristics;
+
 	*gops = gk20a_ops;
 	gops->privsecurity = 0;
 	gk20a_init_mc(gops);
@@ -61,5 +64,12 @@ int gk20a_init_hal(struct gpu_ops *gops)
 	gk20a_init_regops(gops);
 	gops->name = "gk20a";
 
+	c->twod_class = FERMI_TWOD_A;
+	c->threed_class = KEPLER_C;
+	c->compute_class = KEPLER_COMPUTE_A;
+	c->gpfifo_class = KEPLER_CHANNEL_GPFIFO_C;
+	c->inline_to_memory_class = KEPLER_INLINE_TO_MEMORY_A;
+	c->dma_copy_class = KEPLER_DMA_COPY_A;
+
 	return 0;
 }

drivers/gpu/nvgpu/gk20a/hal_gk20a.h

@@ -20,9 +20,8 @@
 
 #include <linux/kernel.h>
 
-struct gpu_ops;
 struct gk20a;
 
-int gk20a_init_hal(struct gpu_ops *gops);
+int gk20a_init_hal(struct gk20a *g);
 
 #endif /* __HAL_GK20A__ */

drivers/gpu/nvgpu/gk20a/ltc_gk20a.h

@@ -15,7 +15,7 @@
 
 #ifndef LTC_GK20A_H
 #define LTC_GK20A_H
-struct gk20a;
+struct gpu_ops;
 
 void gk20a_init_ltc(struct gpu_ops *gops);
 #endif

drivers/gpu/nvgpu/gm20b/gr_gm20b.h

@@ -18,9 +18,11 @@
 struct gk20a;
 
 enum {
-	MAXWELL_B                 = 0xB197,
+	MAXWELL_B		= 0xB197,
-	MAXWELL_COMPUTE_B         = 0xB1C0,
+	MAXWELL_COMPUTE_B	= 0xB1C0,
-	MAXWELL_DMA_COPY_A         = 0xB0B5,
+	KEPLER_INLINE_TO_MEMORY_B= 0xA140,
+	MAXWELL_DMA_COPY_A	= 0xB0B5,
+	MAXWELL_CHANNEL_GPFIFO_A= 0xB06F,
 };
 
 #define NVB197_SET_ALPHA_CIRCULAR_BUFFER_SIZE	0x02dc

drivers/gpu/nvgpu/gm20b/hal_gm20b.c

@@ -83,8 +83,11 @@ static struct gpu_ops gm20b_ops = {
 	}
 };
 
-int gm20b_init_hal(struct gpu_ops *gops)
+int gm20b_init_hal(struct gk20a *g)
 {
+	struct gpu_ops *gops = &g->ops;
+	struct nvgpu_gpu_characteristics *c = &g->gpu_characteristics;
+
 	*gops = gm20b_ops;
 #ifdef CONFIG_TEGRA_ACR
 	if (tegra_platform_is_linsim()) {
@@ -127,5 +130,12 @@ int gm20b_init_hal(struct gpu_ops *gops)
 	gm20b_init_regops(gops);
 	gops->name = "gm20b";
 
+	c->twod_class = FERMI_TWOD_A;
+	c->threed_class = MAXWELL_B;
+	c->compute_class = MAXWELL_COMPUTE_B;
+	c->gpfifo_class = MAXWELL_CHANNEL_GPFIFO_A;
+	c->inline_to_memory_class = KEPLER_INLINE_TO_MEMORY_B;
+	c->dma_copy_class = MAXWELL_DMA_COPY_A;
+
 	return 0;
 }

drivers/gpu/nvgpu/gm20b/hal_gm20b.h

@@ -15,7 +15,7 @@
 
 #ifndef _NVHOST_HAL_GM20B_H
 #define _NVHOST_HAL_GM20B_H
-struct gpu_ops;
+struct gk20a;
 
-int gm20b_init_hal(struct gpu_ops *gops);
+int gm20b_init_hal(struct gk20a *g);
 #endif

drivers/gpu/nvgpu/vgpu/vgpu.c

@@ -242,7 +242,7 @@ static int vgpu_init_hal(struct gk20a *g)
 	case GK20A_GPUID_GK20A:
 		gk20a_dbg_info("gk20a detected");
 		/* init gk20a ops then override with virt extensions */
-		gk20a_init_hal(&g->ops);
+		gk20a_init_hal(g);
 		vgpu_init_fifo_ops(&g->ops);
 		vgpu_init_gr_ops(&g->ops);
 		vgpu_init_ltc_ops(&g->ops);

include/uapi/linux/nvgpu.h

@@ -122,6 +122,13 @@ struct nvgpu_gpu_characteristics {
 
 	__u64 flags;
 
+	__u32 twod_class;
+	__u32 threed_class;
+	__u32 compute_class;
+	__u32 gpfifo_class;
+	__u32 inline_to_memory_class;
+	__u32 dma_copy_class;
+
 	/* Notes:
 	   - This struct can be safely appended with new fields. However, always
 	     keep the structure size multiple of 8 and make sure that the binary