drm/amdgpu: add NGG parameters

NGG (Next Generation Graphics) is a new feature in GFX9.0.  This
adds the relevant parameters.

Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu.h

@@ -103,6 +103,11 @@ extern char *amdgpu_disable_cu;
 extern char *amdgpu_virtual_display;
 extern unsigned amdgpu_pp_feature_mask;
 extern int amdgpu_vram_page_split;
+extern int amdgpu_ngg;
+extern int amdgpu_prim_buf_per_se;
+extern int amdgpu_pos_buf_per_se;
+extern int amdgpu_cntl_sb_buf_per_se;
+extern int amdgpu_param_buf_per_se;
 
 #define AMDGPU_WAIT_IDLE_TIMEOUT_IN_MS	        3000
 #define AMDGPU_MAX_USEC_TIMEOUT			100000	/* 100 ms */
@@ -957,6 +962,28 @@ struct amdgpu_gfx_funcs {
 	void (*read_wave_sgprs)(struct amdgpu_device *adev, uint32_t simd, uint32_t wave, uint32_t start, uint32_t size, uint32_t *dst);
 };
 
+struct amdgpu_ngg_buf {
+	struct amdgpu_bo	*bo;
+	uint64_t		gpu_addr;
+	uint32_t		size;
+	uint32_t		bo_size;
+};
+
+enum {
+	PRIM = 0,
+	POS,
+	CNTL,
+	PARAM,
+	NGG_BUF_MAX
+};
+
+struct amdgpu_ngg {
+	struct amdgpu_ngg_buf	buf[NGG_BUF_MAX];
+	uint32_t		gds_reserve_addr;
+	uint32_t		gds_reserve_size;
+	bool			init;
+};
+
 struct amdgpu_gfx {
 	struct mutex			gpu_clock_mutex;
 	struct amdgpu_gfx_config	config;
@@ -1000,6 +1027,8 @@ struct amdgpu_gfx {
 	uint32_t                        grbm_soft_reset;
 	uint32_t                        srbm_soft_reset;
 	bool                            in_reset;
+	/* NGG */
+	struct amdgpu_ngg		ngg;
 };
 
 int amdgpu_ib_get(struct amdgpu_device *adev, struct amdgpu_vm *vm,

drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c

@@ -103,6 +103,11 @@ unsigned amdgpu_pg_mask = 0xffffffff;
 char *amdgpu_disable_cu = NULL;
 char *amdgpu_virtual_display = NULL;
 unsigned amdgpu_pp_feature_mask = 0xffffffff;
+int amdgpu_ngg = 0;
+int amdgpu_prim_buf_per_se = 0;
+int amdgpu_pos_buf_per_se = 0;
+int amdgpu_cntl_sb_buf_per_se = 0;
+int amdgpu_param_buf_per_se = 0;
 
 MODULE_PARM_DESC(vramlimit, "Restrict VRAM for testing, in megabytes");
 module_param_named(vramlimit, amdgpu_vram_limit, int, 0600);
@@ -210,6 +215,22 @@ MODULE_PARM_DESC(virtual_display,
 		 "Enable virtual display feature (the virtual_display will be set like xxxx:xx:xx.x,x;xxxx:xx:xx.x,x)");
 module_param_named(virtual_display, amdgpu_virtual_display, charp, 0444);
 
+MODULE_PARM_DESC(ngg, "Next Generation Graphics (1 = enable, 0 = disable(default depending on gfx))");
+module_param_named(ngg, amdgpu_ngg, int, 0444);
+
+MODULE_PARM_DESC(prim_buf_per_se, "the size of Primitive Buffer per Shader Engine (default depending on gfx)");
+module_param_named(prim_buf_per_se, amdgpu_prim_buf_per_se, int, 0444);
+
+MODULE_PARM_DESC(pos_buf_per_se, "the size of Position Buffer per Shader Engine (default depending on gfx)");
+module_param_named(pos_buf_per_se, amdgpu_pos_buf_per_se, int, 0444);
+
+MODULE_PARM_DESC(cntl_sb_buf_per_se, "the size of Control Sideband per Shader Engine (default depending on gfx)");
+module_param_named(cntl_sb_buf_per_se, amdgpu_cntl_sb_buf_per_se, int, 0444);
+
+MODULE_PARM_DESC(param_buf_per_se, "the size of Off-Chip Pramater Cache per Shader Engine (default depending on gfx)");
+module_param_named(param_buf_per_se, amdgpu_param_buf_per_se, int, 0444);
+
+
 static const struct pci_device_id pciidlist[] = {
 #ifdef  CONFIG_DRM_AMDGPU_SI
 	{0x1002, 0x6780, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CHIP_TAHITI},

drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c

@@ -541,6 +541,13 @@ static int amdgpu_info_ioctl(struct drm_device *dev, void *data, struct drm_file
 		dev_info.gc_double_offchip_lds_buf =
 			adev->gfx.config.double_offchip_lds_buf;
 
+		if (amdgpu_ngg) {
+			dev_info.prim_buf_gpu_addr = adev->gfx.ngg.buf[PRIM].gpu_addr;
+			dev_info.pos_buf_gpu_addr = adev->gfx.ngg.buf[POS].gpu_addr;
+			dev_info.cntl_sb_buf_gpu_addr = adev->gfx.ngg.buf[CNTL].gpu_addr;
+			dev_info.param_buf_gpu_addr = adev->gfx.ngg.buf[PARAM].gpu_addr;
+		}
+
 		return copy_to_user(out, &dev_info,
 				    min((size_t)size, sizeof(dev_info))) ? -EFAULT : 0;
 	}

include/uapi/drm/amdgpu_drm.h

@@ -743,6 +743,14 @@ struct drm_amdgpu_info_device {
 	__u32 vce_harvest_config;
 	/* gfx double offchip LDS buffers */
 	__u32 gc_double_offchip_lds_buf;
+	/* NGG Primitive Buffer */
+	__u64 prim_buf_gpu_addr;
+	/* NGG Position Buffer */
+	__u64 pos_buf_gpu_addr;
+	/* NGG Control Sideband */
+	__u64 cntl_sb_buf_gpu_addr;
+	/* NGG Parameter Cache */
+	__u64 param_buf_gpu_addr;
 };
 
 struct drm_amdgpu_info_hw_ip {