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RCPT_COUNT_SEVEN(0.00)[11]; R_RATELIMIT(0.00)[to_ip_from(RLqtkr6cif1ebgurukgmwdm7xc)]; RCVD_VIA_SMTP_AUTH(0.00)[]; FREEMAIL_ENVRCPT(0.00)[gmail.com] X-Rspamd-Server: rspamd2.dmz-prg2.suse.org X-Rspamd-Action: no action X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" The DRM aperture helpers are wrappers around video helpers from . There are no callers of these functions. Remove them entirely. Signed-off-by: Thomas Zimmermann Cc: Jonathan Corbet Acked-by: Alex Deucher --- Documentation/gpu/drm-internals.rst | 12 -- MAINTAINERS | 2 - drivers/gpu/drm/Makefile | 1 - drivers/gpu/drm/drm_aperture.c | 192 ---------------------------- include/drm/drm_aperture.h | 38 ------ 5 files changed, 245 deletions(-) delete mode 100644 drivers/gpu/drm/drm_aperture.c delete mode 100644 include/drm/drm_aperture.h diff --git a/Documentation/gpu/drm-internals.rst b/Documentation/gpu/drm-internals.rst index 11d9a5730fb2..cb9ae282771c 100644 --- a/Documentation/gpu/drm-internals.rst +++ b/Documentation/gpu/drm-internals.rst @@ -75,18 +75,6 @@ Module Initialization .. kernel-doc:: include/drm/drm_module.h :doc: overview -Managing Ownership of the Framebuffer Aperture ----------------------------------------------- - -.. kernel-doc:: drivers/gpu/drm/drm_aperture.c - :doc: overview - -.. kernel-doc:: include/drm/drm_aperture.h - :internal: - -.. kernel-doc:: drivers/gpu/drm/drm_aperture.c - :export: - Device Instance and Driver Handling ----------------------------------- diff --git a/MAINTAINERS b/MAINTAINERS index 5a0b7bfb6315..e71e12085a9f 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -7097,12 +7097,10 @@ M: Javier Martinez Canillas L: dri-devel@lists.freedesktop.org S: Maintained T: git https://gitlab.freedesktop.org/drm/misc/kernel.git -F: drivers/gpu/drm/drm_aperture.c F: drivers/gpu/drm/tiny/ofdrm.c F: drivers/gpu/drm/tiny/simpledrm.c F: drivers/video/aperture.c F: drivers/video/nomodeset.c -F: include/drm/drm_aperture.h F: include/linux/aperture.h F: include/video/nomodeset.h diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile index 3894f43f6d47..31d8bf60a2fd 100644 --- a/drivers/gpu/drm/Makefile +++ b/drivers/gpu/drm/Makefile @@ -34,7 +34,6 @@ endif subdir-ccflags-$(CONFIG_DRM_WERROR) += -Werror drm-y := \ - drm_aperture.o \ drm_atomic.o \ drm_atomic_uapi.o \ drm_auth.o \ diff --git a/drivers/gpu/drm/drm_aperture.c b/drivers/gpu/drm/drm_aperture.c deleted file mode 100644 index 5729f3bb4398..000000000000 --- a/drivers/gpu/drm/drm_aperture.c +++ /dev/null @@ -1,192 +0,0 @@ -// SPDX-License-Identifier: MIT - -#include -#include - -#include -#include -#include - -/** - * DOC: overview - * - * A graphics device might be supported by different drivers, but only one - * driver can be active at any given time. Many systems load a generic - * graphics drivers, such as EFI-GOP or VESA, early during the boot process. - * During later boot stages, they replace the generic driver with a dedicated, - * hardware-specific driver. To take over the device the dedicated driver - * first has to remove the generic driver. DRM aperture functions manage - * ownership of DRM framebuffer memory and hand-over between drivers. - * - * DRM drivers should call drm_aperture_remove_conflicting_framebuffers() - * at the top of their probe function. The function removes any generic - * driver that is currently associated with the given framebuffer memory. - * If the framebuffer is located at PCI BAR 0, the rsp code looks as in the - * example given below. - * - * .. code-block:: c - * - * static const struct drm_driver example_driver = { - * ... - * }; - * - * static int remove_conflicting_framebuffers(struct pci_dev *pdev) - * { - * resource_size_t base, size; - * int ret; - * - * base = pci_resource_start(pdev, 0); - * size = pci_resource_len(pdev, 0); - * - * return drm_aperture_remove_conflicting_framebuffers(base, size, - * &example_driver); - * } - * - * static int probe(struct pci_dev *pdev) - * { - * int ret; - * - * // Remove any generic drivers... - * ret = remove_conflicting_framebuffers(pdev); - * if (ret) - * return ret; - * - * // ... and initialize the hardware. - * ... - * - * drm_dev_register(); - * - * return 0; - * } - * - * PCI device drivers should call - * drm_aperture_remove_conflicting_pci_framebuffers() and let it detect the - * framebuffer apertures automatically. Device drivers without knowledge of - * the framebuffer's location shall call drm_aperture_remove_framebuffers(), - * which removes all drivers for known framebuffer. - * - * Drivers that are susceptible to being removed by other drivers, such as - * generic EFI or VESA drivers, have to register themselves as owners of their - * given framebuffer memory. Ownership of the framebuffer memory is achieved - * by calling devm_aperture_acquire_from_firmware(). On success, the driver - * is the owner of the framebuffer range. The function fails if the - * framebuffer is already owned by another driver. See below for an example. - * - * .. code-block:: c - * - * static int acquire_framebuffers(struct drm_device *dev, struct platform_device *pdev) - * { - * resource_size_t base, size; - * - * mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); - * if (!mem) - * return -EINVAL; - * base = mem->start; - * size = resource_size(mem); - * - * return devm_acquire_aperture_from_firmware(dev, base, size); - * } - * - * static int probe(struct platform_device *pdev) - * { - * struct drm_device *dev; - * int ret; - * - * // ... Initialize the device... - * dev = devm_drm_dev_alloc(); - * ... - * - * // ... and acquire ownership of the framebuffer. - * ret = acquire_framebuffers(dev, pdev); - * if (ret) - * return ret; - * - * drm_dev_register(dev, 0); - * - * return 0; - * } - * - * The generic driver is now subject to forced removal by other drivers. This - * only works for platform drivers that support hot unplug. - * When a driver calls drm_aperture_remove_conflicting_framebuffers() et al. - * for the registered framebuffer range, the aperture helpers call - * platform_device_unregister() and the generic driver unloads itself. It - * may not access the device's registers, framebuffer memory, ROM, etc - * afterwards. - */ - -/** - * devm_aperture_acquire_from_firmware - Acquires ownership of a firmware framebuffer - * on behalf of a DRM driver. - * @dev: the DRM device to own the framebuffer memory - * @base: the framebuffer's byte offset in physical memory - * @size: the framebuffer size in bytes - * - * Installs the given device as the new owner of the framebuffer. The function - * expects the framebuffer to be provided by a platform device that has been - * set up by firmware. Firmware can be any generic interface, such as EFI, - * VESA, VGA, etc. If the native hardware driver takes over ownership of the - * framebuffer range, the firmware state gets lost. Aperture helpers will then - * unregister the platform device automatically. Acquired apertures are - * released automatically if the underlying device goes away. - * - * The function fails if the framebuffer range, or parts of it, is currently - * owned by another driver. To evict current owners, callers should use - * drm_aperture_remove_conflicting_framebuffers() et al. before calling this - * function. The function also fails if the given device is not a platform - * device. - * - * Returns: - * 0 on success, or a negative errno value otherwise. - */ -int devm_aperture_acquire_from_firmware(struct drm_device *dev, resource_size_t base, - resource_size_t size) -{ - struct platform_device *pdev; - - if (drm_WARN_ON(dev, !dev_is_platform(dev->dev))) - return -EINVAL; - - pdev = to_platform_device(dev->dev); - - return devm_aperture_acquire_for_platform_device(pdev, base, size); -} -EXPORT_SYMBOL(devm_aperture_acquire_from_firmware); - -/** - * drm_aperture_remove_conflicting_framebuffers - remove existing framebuffers in the given range - * @base: the aperture's base address in physical memory - * @size: aperture size in bytes - * @req_driver: requesting DRM driver - * - * This function removes graphics device drivers which use the memory range described by - * @base and @size. - * - * Returns: - * 0 on success, or a negative errno code otherwise - */ -int drm_aperture_remove_conflicting_framebuffers(resource_size_t base, resource_size_t size, - const struct drm_driver *req_driver) -{ - return aperture_remove_conflicting_devices(base, size, req_driver->name); -} -EXPORT_SYMBOL(drm_aperture_remove_conflicting_framebuffers); - -/** - * drm_aperture_remove_conflicting_pci_framebuffers - remove existing framebuffers for PCI devices - * @pdev: PCI device - * @req_driver: requesting DRM driver - * - * This function removes graphics device drivers using the memory range configured - * for any of @pdev's memory bars. The function assumes that a PCI device with - * shadowed ROM drives a primary display and so kicks out vga16fb. - * - * Returns: - * 0 on success, or a negative errno code otherwise - */ -int drm_aperture_remove_conflicting_pci_framebuffers(struct pci_dev *pdev, - const struct drm_driver *req_driver) -{ - return aperture_remove_conflicting_pci_devices(pdev, req_driver->name); -} -EXPORT_SYMBOL(drm_aperture_remove_conflicting_pci_framebuffers); diff --git a/include/drm/drm_aperture.h b/include/drm/drm_aperture.h deleted file mode 100644 index cbe33b49fd5d..000000000000 --- a/include/drm/drm_aperture.h +++ /dev/null @@ -1,38 +0,0 @@ -/* SPDX-License-Identifier: MIT */ - -#ifndef _DRM_APERTURE_H_ -#define _DRM_APERTURE_H_ - -#include - -struct drm_device; -struct drm_driver; -struct pci_dev; - -int devm_aperture_acquire_from_firmware(struct drm_device *dev, resource_size_t base, - resource_size_t size); - -int drm_aperture_remove_conflicting_framebuffers(resource_size_t base, resource_size_t size, - const struct drm_driver *req_driver); - -int drm_aperture_remove_conflicting_pci_framebuffers(struct pci_dev *pdev, - const struct drm_driver *req_driver); - -/** - * drm_aperture_remove_framebuffers - remove all existing framebuffers - * @req_driver: requesting DRM driver - * - * This function removes all graphics device drivers. Use this function on systems - * that can have their framebuffer located anywhere in memory. - * - * Returns: - * 0 on success, or a negative errno code otherwise - */ -static inline int -drm_aperture_remove_framebuffers(const struct drm_driver *req_driver) -{ - return drm_aperture_remove_conflicting_framebuffers(0, (resource_size_t)-1, - req_driver); -} - -#endif