drm/msm: Add a struct to pass configuration to msm_gpu_init()

The amount of information that we need to pass into msm_gpu_init()
is steadily increasing, so add a new struct to stabilize the function
call and make it easier to add new configuration down the line.
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

drivers/gpu/drm/msm/adreno/adreno_gpu.c

@@ -342,6 +342,7 @@ int adreno_gpu_init(struct drm_device *drm, struct platform_device *pdev,
 		struct adreno_gpu *adreno_gpu, const struct adreno_gpu_funcs *funcs)
 {
 	struct adreno_platform_config *config = pdev->dev.platform_data;
+	struct msm_gpu_config adreno_gpu_config  = { 0 };
 	struct msm_gpu *gpu = &adreno_gpu->base;
 	int ret;
 
@@ -360,9 +361,16 @@ int adreno_gpu_init(struct drm_device *drm, struct platform_device *pdev,
 	DBG("fast_rate=%u, slow_rate=27000000, bus_freq=%u",
 			gpu->fast_rate, gpu->bus_freq);
 
+	adreno_gpu_config.ioname = "kgsl_3d0_reg_memory";
+	adreno_gpu_config.irqname = "kgsl_3d0_irq";
+
+	adreno_gpu_config.va_start = SZ_16M;
+	adreno_gpu_config.va_end = 0xffffffff;
+
+	adreno_gpu_config.ringsz = RB_SIZE;
+
 	ret = msm_gpu_init(drm, pdev, &adreno_gpu->base, &funcs->base,
-			adreno_gpu->info->name, "kgsl_3d0_reg_memory", "kgsl_3d0_irq",
-			RB_SIZE);
+			adreno_gpu->info->name, &adreno_gpu_config);
 	if (ret)
 		return ret;
 

drivers/gpu/drm/msm/msm_gpu.c

@@ -562,7 +562,7 @@ static int get_clocks(struct platform_device *pdev, struct msm_gpu *gpu)
 
 int msm_gpu_init(struct drm_device *drm, struct platform_device *pdev,
 		struct msm_gpu *gpu, const struct msm_gpu_funcs *funcs,
-		const char *name, const char *ioname, const char *irqname, int ringsz)
+		const char *name, struct msm_gpu_config *config)
 {
 	struct iommu_domain *iommu;
 	int ret;
@@ -593,14 +593,14 @@ int msm_gpu_init(struct drm_device *drm, struct platform_device *pdev,
 
 
 	/* Map registers: */
-	gpu->mmio = msm_ioremap(pdev, ioname, name);
+	gpu->mmio = msm_ioremap(pdev, config->ioname, name);
 	if (IS_ERR(gpu->mmio)) {
 		ret = PTR_ERR(gpu->mmio);
 		goto fail;
 	}
 
 	/* Get Interrupt: */
-	gpu->irq = platform_get_irq_byname(pdev, irqname);
+	gpu->irq = platform_get_irq_byname(pdev, config->irqname);
 	if (gpu->irq < 0) {
 		ret = gpu->irq;
 		dev_err(drm->dev, "failed to get irq: %d\n", ret);
@@ -640,9 +640,8 @@ int msm_gpu_init(struct drm_device *drm, struct platform_device *pdev,
 	 */
 	iommu = iommu_domain_alloc(&platform_bus_type);
 	if (iommu) {
-		/* TODO 32b vs 64b address space.. */
-		iommu->geometry.aperture_start = SZ_16M;
-		iommu->geometry.aperture_end = 0xffffffff;
+		iommu->geometry.aperture_start = config->va_start;
+		iommu->geometry.aperture_end = config->va_end;
 
 		dev_info(drm->dev, "%s: using IOMMU\n", name);
 		gpu->aspace = msm_gem_address_space_create(&pdev->dev,
@@ -663,7 +662,7 @@ int msm_gpu_init(struct drm_device *drm, struct platform_device *pdev,
 
 	/* Create ringbuffer: */
 	mutex_lock(&drm->struct_mutex);
-	gpu->rb = msm_ringbuffer_new(gpu, ringsz);
+	gpu->rb = msm_ringbuffer_new(gpu, config->ringsz);
 	mutex_unlock(&drm->struct_mutex);
 	if (IS_ERR(gpu->rb)) {
 		ret = PTR_ERR(gpu->rb);

drivers/gpu/drm/msm/msm_gpu.h

@@ -28,6 +28,14 @@
 struct msm_gem_submit;
 struct msm_gpu_perfcntr;
 
+struct msm_gpu_config {
+	const char *ioname;
+	const char *irqname;
+	uint64_t va_start;
+	uint64_t va_end;
+	unsigned int ringsz;
+};
+
 /* So far, with hardware that I've seen to date, we can have:
  *  + zero, one, or two z180 2d cores
  *  + a3xx or a2xx 3d core, which share a common CP (the firmware
@@ -208,7 +216,8 @@ void msm_gpu_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit,
 
 int msm_gpu_init(struct drm_device *drm, struct platform_device *pdev,
 		struct msm_gpu *gpu, const struct msm_gpu_funcs *funcs,
-		const char *name, const char *ioname, const char *irqname, int ringsz);
+		const char *name, struct msm_gpu_config *config);
+
 void msm_gpu_cleanup(struct msm_gpu *gpu);
 
 struct msm_gpu *adreno_load_gpu(struct drm_device *dev);