drm/amdgpu: rename num_doorbells

Rename doorbell.num_doorbells to doorbell.num_kernel_doorbells to
make it more readable.

Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Christian Koenig <christian.koenig@amd.com>
Acked-by: Christian Koenig <christian.koenig@amd.com>
Signed-off-by: Shashank Sharma <shashank.sharma@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -96,7 +96,7 @@ static void amdgpu_doorbell_get_kfd_info(struct amdgpu_device *adev,
 					 size_t *start_offset)
 {
 	/*
-	 * The first num_doorbells are used by amdgpu.
+	 * The first num_kernel_doorbells are used by amdgpu.
 	 * amdkfd takes whatever's left in the aperture.
 	 */
 	if (adev->enable_mes) {
@@ -109,11 +109,11 @@ static void amdgpu_doorbell_get_kfd_info(struct amdgpu_device *adev,
 		*aperture_base = adev->doorbell.base;
 		*aperture_size = 0;
 		*start_offset = 0;
-	} else if (adev->doorbell.size > adev->doorbell.num_doorbells *
+	} else if (adev->doorbell.size > adev->doorbell.num_kernel_doorbells *
 						sizeof(u32)) {
 		*aperture_base = adev->doorbell.base;
 		*aperture_size = adev->doorbell.size;
-		*start_offset = adev->doorbell.num_doorbells * sizeof(u32);
+		*start_offset = adev->doorbell.num_kernel_doorbells * sizeof(u32);
 	} else {
 		*aperture_base = 0;
 		*aperture_size = 0;

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

@@ -602,7 +602,7 @@ u32 amdgpu_mm_rdoorbell(struct amdgpu_device *adev, u32 index)
 	if (amdgpu_device_skip_hw_access(adev))
 		return 0;
 
-	if (index < adev->doorbell.num_doorbells) {
+	if (index < adev->doorbell.num_kernel_doorbells) {
 		return readl(adev->doorbell.ptr + index);
 	} else {
 		DRM_ERROR("reading beyond doorbell aperture: 0x%08x!\n", index);
@@ -625,7 +625,7 @@ void amdgpu_mm_wdoorbell(struct amdgpu_device *adev, u32 index, u32 v)
 	if (amdgpu_device_skip_hw_access(adev))
 		return;
 
-	if (index < adev->doorbell.num_doorbells) {
+	if (index < adev->doorbell.num_kernel_doorbells) {
 		writel(v, adev->doorbell.ptr + index);
 	} else {
 		DRM_ERROR("writing beyond doorbell aperture: 0x%08x!\n", index);
@@ -646,7 +646,7 @@ u64 amdgpu_mm_rdoorbell64(struct amdgpu_device *adev, u32 index)
 	if (amdgpu_device_skip_hw_access(adev))
 		return 0;
 
-	if (index < adev->doorbell.num_doorbells) {
+	if (index < adev->doorbell.num_kernel_doorbells) {
 		return atomic64_read((atomic64_t *)(adev->doorbell.ptr + index));
 	} else {
 		DRM_ERROR("reading beyond doorbell aperture: 0x%08x!\n", index);
@@ -669,7 +669,7 @@ void amdgpu_mm_wdoorbell64(struct amdgpu_device *adev, u32 index, u64 v)
 	if (amdgpu_device_skip_hw_access(adev))
 		return;
 
-	if (index < adev->doorbell.num_doorbells) {
+	if (index < adev->doorbell.num_kernel_doorbells) {
 		atomic64_set((atomic64_t *)(adev->doorbell.ptr + index), v);
 	} else {
 		DRM_ERROR("writing beyond doorbell aperture: 0x%08x!\n", index);
@@ -1060,7 +1060,7 @@ static int amdgpu_device_doorbell_init(struct amdgpu_device *adev)
 	if (adev->asic_type < CHIP_BONAIRE) {
 		adev->doorbell.base = 0;
 		adev->doorbell.size = 0;
-		adev->doorbell.num_doorbells = 0;
+		adev->doorbell.num_kernel_doorbells = 0;
 		adev->doorbell.ptr = NULL;
 		return 0;
 	}
@@ -1075,27 +1075,27 @@ static int amdgpu_device_doorbell_init(struct amdgpu_device *adev)
 	adev->doorbell.size = pci_resource_len(adev->pdev, 2);
 
 	if (adev->enable_mes) {
-		adev->doorbell.num_doorbells =
+		adev->doorbell.num_kernel_doorbells =
 			adev->doorbell.size / sizeof(u32);
 	} else {
-		adev->doorbell.num_doorbells =
+		adev->doorbell.num_kernel_doorbells =
 			min_t(u32, adev->doorbell.size / sizeof(u32),
 			      adev->doorbell_index.max_assignment+1);
-		if (adev->doorbell.num_doorbells == 0)
+		if (adev->doorbell.num_kernel_doorbells == 0)
 			return -EINVAL;
 
 		/* For Vega, reserve and map two pages on doorbell BAR since SDMA
 		 * paging queue doorbell use the second page. The
 		 * AMDGPU_DOORBELL64_MAX_ASSIGNMENT definition assumes all the
 		 * doorbells are in the first page. So with paging queue enabled,
-		 * the max num_doorbells should + 1 page (0x400 in dword)
+		 * the max num_kernel_doorbells should + 1 page (0x400 in dword)
 		 */
 		if (adev->asic_type >= CHIP_VEGA10)
-			adev->doorbell.num_doorbells += 0x400;
+			adev->doorbell.num_kernel_doorbells += 0x400;
 	}
 
 	adev->doorbell.ptr = ioremap(adev->doorbell.base,
-				     adev->doorbell.num_doorbells *
+				     adev->doorbell.num_kernel_doorbells *
 				     sizeof(u32));
 	if (adev->doorbell.ptr == NULL)
 		return -ENOMEM;

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

@@ -29,7 +29,9 @@ struct amdgpu_doorbell {
 	resource_size_t		base;
 	resource_size_t		size;
 	u32 __iomem		*ptr;
-	u32			num_doorbells;	/* Number of doorbells actually reserved for amdgpu. */
+
+	/* Number of doorbells reserved for amdgpu kernel driver */
+	u32 num_kernel_doorbells;
 };
 
 /* Reserved doorbells for amdgpu (including multimedia).