drivers/gpu/drm/qxl/qxl_kms.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/qxl/qxl_kms.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/qxl/qxl_kms.c
Extension
.c
Size
9265 bytes
Lines
324
Domain
Driver Families
Bucket
drivers/gpu
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

if (!qdev->surface_mapping) {
			pr_err("Unable to create surface_mapping");
			r = -ENOMEM;
			goto vram_mapping_free;
		}
	}

	DRM_DEBUG_KMS("qxl: vram %llx-%llx(%dM %dk), surface %llx-%llx(%dM %dk, %s)\n",
		 (unsigned long long)qdev->vram_base,
		 (unsigned long long)pci_resource_end(pdev, 0),
		 (int)pci_resource_len(pdev, 0) / 1024 / 1024,
		 (int)pci_resource_len(pdev, 0) / 1024,
		 (unsigned long long)qdev->surfaceram_base,
		 (unsigned long long)pci_resource_end(pdev, sb),
		 (int)qdev->surfaceram_size / 1024 / 1024,
		 (int)qdev->surfaceram_size / 1024,
		 (sb == 4) ? "64bit" : "32bit");

	qdev->rom = ioremap_wc(qdev->rom_base, qdev->rom_size);
	if (!qdev->rom) {
		pr_err("Unable to ioremap ROM\n");
		r = -ENOMEM;
		goto surface_mapping_free;
	}

	if (!qxl_check_device(qdev)) {
		r = -ENODEV;
		goto rom_unmap;
	}

	r = qxl_bo_init(qdev);
	if (r) {
		DRM_ERROR("bo init failed %d\n", r);
		goto rom_unmap;
	}

	qdev->ram_header = ioremap_wc(qdev->vram_base +
				   qdev->rom->ram_header_offset,
				   sizeof(*qdev->ram_header));
	if (!qdev->ram_header) {
		DRM_ERROR("Unable to ioremap RAM header\n");
		r = -ENOMEM;
		goto bo_fini;
	}

	qdev->command_ring = qxl_ring_create(&(qdev->ram_header->cmd_ring_hdr),
					     sizeof(struct qxl_command),
					     QXL_COMMAND_RING_SIZE,
					     qdev->io_base + QXL_IO_NOTIFY_CMD,
					     &qdev->display_event);
	if (!qdev->command_ring) {
		DRM_ERROR("Unable to create command ring\n");
		r = -ENOMEM;
		goto ram_header_unmap;
	}

	qdev->cursor_ring = qxl_ring_create(
				&(qdev->ram_header->cursor_ring_hdr),
				sizeof(struct qxl_command),
				QXL_CURSOR_RING_SIZE,
				qdev->io_base + QXL_IO_NOTIFY_CURSOR,
				&qdev->cursor_event);

	if (!qdev->cursor_ring) {
		DRM_ERROR("Unable to create cursor ring\n");
		r = -ENOMEM;
		goto command_ring_free;
	}

	qdev->release_ring = qxl_ring_create(
				&(qdev->ram_header->release_ring_hdr),
				sizeof(uint64_t),
				QXL_RELEASE_RING_SIZE, 0,
				NULL);

	if (!qdev->release_ring) {
		DRM_ERROR("Unable to create release ring\n");
		r = -ENOMEM;
		goto cursor_ring_free;
	}

	idr_init_base(&qdev->release_idr, 1);
	spin_lock_init(&qdev->release_idr_lock);
	spin_lock_init(&qdev->release_lock);

	idr_init_base(&qdev->surf_id_idr, 1);
	spin_lock_init(&qdev->surf_id_idr_lock);

	mutex_init(&qdev->async_io_mutex);

Annotation

Implementation Notes