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drm/bochs: new driver
DRM driver for (virtual) vga cards using the bochs dispi interface, such as the qemu standard vga (qemu -vga std). Don't bother supporting anything but 32bpp for now, even though the virtual hardware is able to do that. Known issue: mmap(/dev/fb0) doesn't work. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Gerd Hoffmann
Dave Airlie
parent
859ae233cd
commit
0a6659bdc5
@ -192,6 +192,8 @@ source "drivers/gpu/drm/tilcdc/Kconfig"
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source "drivers/gpu/drm/qxl/Kconfig"
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source "drivers/gpu/drm/qxl/Kconfig"
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source "drivers/gpu/drm/bochs/Kconfig"
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source "drivers/gpu/drm/msm/Kconfig"
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source "drivers/gpu/drm/msm/Kconfig"
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source "drivers/gpu/drm/tegra/Kconfig"
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source "drivers/gpu/drm/tegra/Kconfig"
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@ -58,6 +58,7 @@ obj-$(CONFIG_DRM_SHMOBILE) +=shmobile/
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obj-$(CONFIG_DRM_OMAP) += omapdrm/
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obj-$(CONFIG_DRM_OMAP) += omapdrm/
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obj-$(CONFIG_DRM_TILCDC) += tilcdc/
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obj-$(CONFIG_DRM_TILCDC) += tilcdc/
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obj-$(CONFIG_DRM_QXL) += qxl/
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obj-$(CONFIG_DRM_QXL) += qxl/
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obj-$(CONFIG_DRM_BOCHS) += bochs/
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obj-$(CONFIG_DRM_MSM) += msm/
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obj-$(CONFIG_DRM_MSM) += msm/
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obj-$(CONFIG_DRM_TEGRA) += tegra/
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obj-$(CONFIG_DRM_TEGRA) += tegra/
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obj-y += i2c/
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obj-y += i2c/
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11
drivers/gpu/drm/bochs/Kconfig
Normal file
11
drivers/gpu/drm/bochs/Kconfig
Normal file
@ -0,0 +1,11 @@
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config DRM_BOCHS
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tristate "DRM Support for bochs dispi vga interface (qemu stdvga)"
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depends on DRM && PCI
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select DRM_KMS_HELPER
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select FB_SYS_FILLRECT
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select FB_SYS_COPYAREA
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select FB_SYS_IMAGEBLIT
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select DRM_TTM
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help
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Choose this option for qemu.
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If M is selected the module will be called bochs-drm.
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4
drivers/gpu/drm/bochs/Makefile
Normal file
4
drivers/gpu/drm/bochs/Makefile
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@ -0,0 +1,4 @@
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ccflags-y := -Iinclude/drm
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bochs-drm-y := bochs_drv.o bochs_mm.o bochs_kms.o bochs_fbdev.o bochs_hw.o
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obj-$(CONFIG_DRM_BOCHS) += bochs-drm.o
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164
drivers/gpu/drm/bochs/bochs.h
Normal file
164
drivers/gpu/drm/bochs/bochs.h
Normal file
@ -0,0 +1,164 @@
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#include <linux/io.h>
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#include <linux/fb.h>
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#include <drm/drmP.h>
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#include <drm/drm_crtc.h>
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#include <drm/drm_crtc_helper.h>
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#include <drm/drm_fb_helper.h>
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#include <ttm/ttm_bo_driver.h>
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#include <ttm/ttm_page_alloc.h>
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/* ---------------------------------------------------------------------- */
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#define VBE_DISPI_IOPORT_INDEX 0x01CE
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#define VBE_DISPI_IOPORT_DATA 0x01CF
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#define VBE_DISPI_INDEX_ID 0x0
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#define VBE_DISPI_INDEX_XRES 0x1
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#define VBE_DISPI_INDEX_YRES 0x2
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#define VBE_DISPI_INDEX_BPP 0x3
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#define VBE_DISPI_INDEX_ENABLE 0x4
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#define VBE_DISPI_INDEX_BANK 0x5
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#define VBE_DISPI_INDEX_VIRT_WIDTH 0x6
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#define VBE_DISPI_INDEX_VIRT_HEIGHT 0x7
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#define VBE_DISPI_INDEX_X_OFFSET 0x8
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#define VBE_DISPI_INDEX_Y_OFFSET 0x9
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#define VBE_DISPI_INDEX_VIDEO_MEMORY_64K 0xa
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#define VBE_DISPI_ID0 0xB0C0
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#define VBE_DISPI_ID1 0xB0C1
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#define VBE_DISPI_ID2 0xB0C2
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#define VBE_DISPI_ID3 0xB0C3
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#define VBE_DISPI_ID4 0xB0C4
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#define VBE_DISPI_ID5 0xB0C5
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#define VBE_DISPI_DISABLED 0x00
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#define VBE_DISPI_ENABLED 0x01
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#define VBE_DISPI_GETCAPS 0x02
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#define VBE_DISPI_8BIT_DAC 0x20
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#define VBE_DISPI_LFB_ENABLED 0x40
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#define VBE_DISPI_NOCLEARMEM 0x80
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/* ---------------------------------------------------------------------- */
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enum bochs_types {
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BOCHS_QEMU_STDVGA,
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BOCHS_UNKNOWN,
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};
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struct bochs_framebuffer {
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struct drm_framebuffer base;
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struct drm_gem_object *obj;
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};
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struct bochs_device {
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/* hw */
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void __iomem *mmio;
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int ioports;
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void __iomem *fb_map;
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unsigned long fb_base;
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unsigned long fb_size;
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/* mode */
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u16 xres;
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u16 yres;
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u16 yres_virtual;
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u32 stride;
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u32 bpp;
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/* drm */
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struct drm_device *dev;
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struct drm_crtc crtc;
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struct drm_encoder encoder;
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struct drm_connector connector;
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bool mode_config_initialized;
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/* ttm */
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struct {
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struct drm_global_reference mem_global_ref;
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struct ttm_bo_global_ref bo_global_ref;
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struct ttm_bo_device bdev;
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bool initialized;
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} ttm;
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/* fbdev */
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struct {
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struct bochs_framebuffer gfb;
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struct drm_fb_helper helper;
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int size;
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int x1, y1, x2, y2; /* dirty rect */
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spinlock_t dirty_lock;
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bool initialized;
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} fb;
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};
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#define to_bochs_framebuffer(x) container_of(x, struct bochs_framebuffer, base)
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struct bochs_bo {
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struct ttm_buffer_object bo;
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struct ttm_placement placement;
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struct ttm_bo_kmap_obj kmap;
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struct drm_gem_object gem;
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u32 placements[3];
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int pin_count;
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};
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static inline struct bochs_bo *bochs_bo(struct ttm_buffer_object *bo)
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{
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return container_of(bo, struct bochs_bo, bo);
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}
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static inline struct bochs_bo *gem_to_bochs_bo(struct drm_gem_object *gem)
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{
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return container_of(gem, struct bochs_bo, gem);
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}
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#define DRM_FILE_PAGE_OFFSET (0x100000000ULL >> PAGE_SHIFT)
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static inline u64 bochs_bo_mmap_offset(struct bochs_bo *bo)
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{
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return drm_vma_node_offset_addr(&bo->bo.vma_node);
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}
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/* ---------------------------------------------------------------------- */
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/* bochs_hw.c */
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int bochs_hw_init(struct drm_device *dev, uint32_t flags);
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void bochs_hw_fini(struct drm_device *dev);
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void bochs_hw_setmode(struct bochs_device *bochs,
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struct drm_display_mode *mode);
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void bochs_hw_setbase(struct bochs_device *bochs,
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int x, int y, u64 addr);
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/* bochs_mm.c */
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int bochs_mm_init(struct bochs_device *bochs);
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void bochs_mm_fini(struct bochs_device *bochs);
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int bochs_mmap(struct file *filp, struct vm_area_struct *vma);
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int bochs_gem_create(struct drm_device *dev, u32 size, bool iskernel,
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struct drm_gem_object **obj);
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int bochs_gem_init_object(struct drm_gem_object *obj);
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void bochs_gem_free_object(struct drm_gem_object *obj);
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int bochs_dumb_create(struct drm_file *file, struct drm_device *dev,
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struct drm_mode_create_dumb *args);
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int bochs_dumb_mmap_offset(struct drm_file *file, struct drm_device *dev,
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uint32_t handle, uint64_t *offset);
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int bochs_framebuffer_init(struct drm_device *dev,
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struct bochs_framebuffer *gfb,
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struct drm_mode_fb_cmd2 *mode_cmd,
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struct drm_gem_object *obj);
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int bochs_bo_pin(struct bochs_bo *bo, u32 pl_flag, u64 *gpu_addr);
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int bochs_bo_unpin(struct bochs_bo *bo);
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extern const struct drm_mode_config_funcs bochs_mode_funcs;
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/* bochs_kms.c */
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int bochs_kms_init(struct bochs_device *bochs);
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void bochs_kms_fini(struct bochs_device *bochs);
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/* bochs_fbdev.c */
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int bochs_fbdev_init(struct bochs_device *bochs);
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void bochs_fbdev_fini(struct bochs_device *bochs);
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178
drivers/gpu/drm/bochs/bochs_drv.c
Normal file
178
drivers/gpu/drm/bochs/bochs_drv.c
Normal file
@ -0,0 +1,178 @@
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/mm.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include "bochs.h"
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static bool enable_fbdev = true;
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module_param_named(fbdev, enable_fbdev, bool, 0444);
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MODULE_PARM_DESC(fbdev, "register fbdev device");
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/* ---------------------------------------------------------------------- */
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/* drm interface */
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static int bochs_unload(struct drm_device *dev)
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{
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struct bochs_device *bochs = dev->dev_private;
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bochs_fbdev_fini(bochs);
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bochs_kms_fini(bochs);
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bochs_mm_fini(bochs);
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bochs_hw_fini(dev);
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kfree(bochs);
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dev->dev_private = NULL;
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return 0;
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}
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static int bochs_load(struct drm_device *dev, unsigned long flags)
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{
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struct bochs_device *bochs;
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int ret;
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bochs = kzalloc(sizeof(*bochs), GFP_KERNEL);
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if (bochs == NULL)
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return -ENOMEM;
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dev->dev_private = bochs;
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bochs->dev = dev;
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ret = bochs_hw_init(dev, flags);
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if (ret)
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goto err;
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ret = bochs_mm_init(bochs);
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if (ret)
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goto err;
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ret = bochs_kms_init(bochs);
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if (ret)
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goto err;
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if (enable_fbdev)
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bochs_fbdev_init(bochs);
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return 0;
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err:
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bochs_unload(dev);
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return ret;
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}
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static const struct file_operations bochs_fops = {
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.owner = THIS_MODULE,
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.open = drm_open,
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.release = drm_release,
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.unlocked_ioctl = drm_ioctl,
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#ifdef CONFIG_COMPAT
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.compat_ioctl = drm_compat_ioctl,
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#endif
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.poll = drm_poll,
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.read = drm_read,
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.llseek = no_llseek,
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.mmap = bochs_mmap,
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};
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static struct drm_driver bochs_driver = {
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.driver_features = DRIVER_GEM | DRIVER_MODESET,
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.load = bochs_load,
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.unload = bochs_unload,
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.fops = &bochs_fops,
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.name = "bochs-drm",
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.desc = "bochs dispi vga interface (qemu stdvga)",
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.date = "20130925",
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.major = 1,
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.minor = 0,
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.gem_free_object = bochs_gem_free_object,
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.dumb_create = bochs_dumb_create,
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.dumb_map_offset = bochs_dumb_mmap_offset,
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.dumb_destroy = drm_gem_dumb_destroy,
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};
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/* ---------------------------------------------------------------------- */
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/* pci interface */
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static int bochs_kick_out_firmware_fb(struct pci_dev *pdev)
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{
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struct apertures_struct *ap;
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ap = alloc_apertures(1);
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if (!ap)
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return -ENOMEM;
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ap->ranges[0].base = pci_resource_start(pdev, 0);
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ap->ranges[0].size = pci_resource_len(pdev, 0);
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remove_conflicting_framebuffers(ap, "bochsdrmfb", false);
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kfree(ap);
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return 0;
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}
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static int bochs_pci_probe(struct pci_dev *pdev,
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const struct pci_device_id *ent)
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{
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int ret;
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ret = bochs_kick_out_firmware_fb(pdev);
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if (ret)
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return ret;
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return drm_get_pci_dev(pdev, ent, &bochs_driver);
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}
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static void bochs_pci_remove(struct pci_dev *pdev)
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{
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struct drm_device *dev = pci_get_drvdata(pdev);
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drm_put_dev(dev);
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}
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static DEFINE_PCI_DEVICE_TABLE(bochs_pci_tbl) = {
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{
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.vendor = 0x1234,
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.device = 0x1111,
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.subvendor = 0x1af4,
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.subdevice = 0x1100,
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.driver_data = BOCHS_QEMU_STDVGA,
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},
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{
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.vendor = 0x1234,
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.device = 0x1111,
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.subvendor = PCI_ANY_ID,
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.subdevice = PCI_ANY_ID,
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.driver_data = BOCHS_UNKNOWN,
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},
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{ /* end of list */ }
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};
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static struct pci_driver bochs_pci_driver = {
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.name = "bochs-drm",
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.id_table = bochs_pci_tbl,
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.probe = bochs_pci_probe,
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.remove = bochs_pci_remove,
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};
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/* ---------------------------------------------------------------------- */
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/* module init/exit */
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static int __init bochs_init(void)
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||||||
|
{
|
||||||
|
return drm_pci_init(&bochs_driver, &bochs_pci_driver);
|
||||||
|
}
|
||||||
|
|
||||||
|
static void __exit bochs_exit(void)
|
||||||
|
{
|
||||||
|
drm_pci_exit(&bochs_driver, &bochs_pci_driver);
|
||||||
|
}
|
||||||
|
|
||||||
|
module_init(bochs_init);
|
||||||
|
module_exit(bochs_exit);
|
||||||
|
|
||||||
|
MODULE_DEVICE_TABLE(pci, bochs_pci_tbl);
|
||||||
|
MODULE_AUTHOR("Gerd Hoffmann <kraxel@redhat.com>");
|
||||||
|
MODULE_LICENSE("GPL");
|
||||||
215
drivers/gpu/drm/bochs/bochs_fbdev.c
Normal file
215
drivers/gpu/drm/bochs/bochs_fbdev.c
Normal file
@ -0,0 +1,215 @@
|
|||||||
|
/*
|
||||||
|
* This program is free software; you can redistribute it and/or modify
|
||||||
|
* it under the terms of the GNU General Public License as published by
|
||||||
|
* the Free Software Foundation; either version 2 of the License, or
|
||||||
|
* (at your option) any later version.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include "bochs.h"
|
||||||
|
|
||||||
|
/* ---------------------------------------------------------------------- */
|
||||||
|
|
||||||
|
static struct fb_ops bochsfb_ops = {
|
||||||
|
.owner = THIS_MODULE,
|
||||||
|
.fb_check_var = drm_fb_helper_check_var,
|
||||||
|
.fb_set_par = drm_fb_helper_set_par,
|
||||||
|
.fb_fillrect = sys_fillrect,
|
||||||
|
.fb_copyarea = sys_copyarea,
|
||||||
|
.fb_imageblit = sys_imageblit,
|
||||||
|
.fb_pan_display = drm_fb_helper_pan_display,
|
||||||
|
.fb_blank = drm_fb_helper_blank,
|
||||||
|
.fb_setcmap = drm_fb_helper_setcmap,
|
||||||
|
};
|
||||||
|
|
||||||
|
static int bochsfb_create_object(struct bochs_device *bochs,
|
||||||
|
struct drm_mode_fb_cmd2 *mode_cmd,
|
||||||
|
struct drm_gem_object **gobj_p)
|
||||||
|
{
|
||||||
|
struct drm_device *dev = bochs->dev;
|
||||||
|
struct drm_gem_object *gobj;
|
||||||
|
u32 size;
|
||||||
|
int ret = 0;
|
||||||
|
|
||||||
|
size = mode_cmd->pitches[0] * mode_cmd->height;
|
||||||
|
ret = bochs_gem_create(dev, size, true, &gobj);
|
||||||
|
if (ret)
|
||||||
|
return ret;
|
||||||
|
|
||||||
|
*gobj_p = gobj;
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int bochsfb_create(struct drm_fb_helper *helper,
|
||||||
|
struct drm_fb_helper_surface_size *sizes)
|
||||||
|
{
|
||||||
|
struct bochs_device *bochs =
|
||||||
|
container_of(helper, struct bochs_device, fb.helper);
|
||||||
|
struct drm_device *dev = bochs->dev;
|
||||||
|
struct fb_info *info;
|
||||||
|
struct drm_framebuffer *fb;
|
||||||
|
struct drm_mode_fb_cmd2 mode_cmd;
|
||||||
|
struct device *device = &dev->pdev->dev;
|
||||||
|
struct drm_gem_object *gobj = NULL;
|
||||||
|
struct bochs_bo *bo = NULL;
|
||||||
|
int size, ret;
|
||||||
|
|
||||||
|
if (sizes->surface_bpp != 32)
|
||||||
|
return -EINVAL;
|
||||||
|
|
||||||
|
mode_cmd.width = sizes->surface_width;
|
||||||
|
mode_cmd.height = sizes->surface_height;
|
||||||
|
mode_cmd.pitches[0] = mode_cmd.width * ((sizes->surface_bpp + 7) / 8);
|
||||||
|
mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
|
||||||
|
sizes->surface_depth);
|
||||||
|
size = mode_cmd.pitches[0] * mode_cmd.height;
|
||||||
|
|
||||||
|
/* alloc, pin & map bo */
|
||||||
|
ret = bochsfb_create_object(bochs, &mode_cmd, &gobj);
|
||||||
|
if (ret) {
|
||||||
|
DRM_ERROR("failed to create fbcon backing object %d\n", ret);
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
bo = gem_to_bochs_bo(gobj);
|
||||||
|
|
||||||
|
ret = ttm_bo_reserve(&bo->bo, true, false, false, 0);
|
||||||
|
if (ret)
|
||||||
|
return ret;
|
||||||
|
|
||||||
|
ret = bochs_bo_pin(bo, TTM_PL_FLAG_VRAM, NULL);
|
||||||
|
if (ret) {
|
||||||
|
DRM_ERROR("failed to pin fbcon\n");
|
||||||
|
ttm_bo_unreserve(&bo->bo);
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages,
|
||||||
|
&bo->kmap);
|
||||||
|
if (ret) {
|
||||||
|
DRM_ERROR("failed to kmap fbcon\n");
|
||||||
|
ttm_bo_unreserve(&bo->bo);
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
ttm_bo_unreserve(&bo->bo);
|
||||||
|
|
||||||
|
/* init fb device */
|
||||||
|
info = framebuffer_alloc(0, device);
|
||||||
|
if (info == NULL)
|
||||||
|
return -ENOMEM;
|
||||||
|
|
||||||
|
info->par = &bochs->fb.helper;
|
||||||
|
|
||||||
|
ret = bochs_framebuffer_init(bochs->dev, &bochs->fb.gfb, &mode_cmd, gobj);
|
||||||
|
if (ret)
|
||||||
|
return ret;
|
||||||
|
|
||||||
|
bochs->fb.size = size;
|
||||||
|
|
||||||
|
/* setup helper */
|
||||||
|
fb = &bochs->fb.gfb.base;
|
||||||
|
bochs->fb.helper.fb = fb;
|
||||||
|
bochs->fb.helper.fbdev = info;
|
||||||
|
|
||||||
|
strcpy(info->fix.id, "bochsdrmfb");
|
||||||
|
|
||||||
|
info->flags = FBINFO_DEFAULT;
|
||||||
|
info->fbops = &bochsfb_ops;
|
||||||
|
|
||||||
|
drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
|
||||||
|
drm_fb_helper_fill_var(info, &bochs->fb.helper, sizes->fb_width,
|
||||||
|
sizes->fb_height);
|
||||||
|
|
||||||
|
info->screen_base = bo->kmap.virtual;
|
||||||
|
info->screen_size = size;
|
||||||
|
|
||||||
|
#if 0
|
||||||
|
/* FIXME: get this right for mmap(/dev/fb0) */
|
||||||
|
info->fix.smem_start = bochs_bo_mmap_offset(bo);
|
||||||
|
info->fix.smem_len = size;
|
||||||
|
#endif
|
||||||
|
|
||||||
|
ret = fb_alloc_cmap(&info->cmap, 256, 0);
|
||||||
|
if (ret) {
|
||||||
|
DRM_ERROR("%s: can't allocate color map\n", info->fix.id);
|
||||||
|
return -ENOMEM;
|
||||||
|
}
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int bochs_fbdev_destroy(struct bochs_device *bochs)
|
||||||
|
{
|
||||||
|
struct bochs_framebuffer *gfb = &bochs->fb.gfb;
|
||||||
|
struct fb_info *info;
|
||||||
|
|
||||||
|
DRM_DEBUG_DRIVER("\n");
|
||||||
|
|
||||||
|
if (bochs->fb.helper.fbdev) {
|
||||||
|
info = bochs->fb.helper.fbdev;
|
||||||
|
|
||||||
|
unregister_framebuffer(info);
|
||||||
|
if (info->cmap.len)
|
||||||
|
fb_dealloc_cmap(&info->cmap);
|
||||||
|
framebuffer_release(info);
|
||||||
|
}
|
||||||
|
|
||||||
|
if (gfb->obj) {
|
||||||
|
drm_gem_object_unreference_unlocked(gfb->obj);
|
||||||
|
gfb->obj = NULL;
|
||||||
|
}
|
||||||
|
|
||||||
|
drm_fb_helper_fini(&bochs->fb.helper);
|
||||||
|
drm_framebuffer_unregister_private(&gfb->base);
|
||||||
|
drm_framebuffer_cleanup(&gfb->base);
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
void bochs_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
|
||||||
|
u16 blue, int regno)
|
||||||
|
{
|
||||||
|
}
|
||||||
|
|
||||||
|
void bochs_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
|
||||||
|
u16 *blue, int regno)
|
||||||
|
{
|
||||||
|
*red = regno;
|
||||||
|
*green = regno;
|
||||||
|
*blue = regno;
|
||||||
|
}
|
||||||
|
|
||||||
|
static struct drm_fb_helper_funcs bochs_fb_helper_funcs = {
|
||||||
|
.gamma_set = bochs_fb_gamma_set,
|
||||||
|
.gamma_get = bochs_fb_gamma_get,
|
||||||
|
.fb_probe = bochsfb_create,
|
||||||
|
};
|
||||||
|
|
||||||
|
int bochs_fbdev_init(struct bochs_device *bochs)
|
||||||
|
{
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
bochs->fb.helper.funcs = &bochs_fb_helper_funcs;
|
||||||
|
spin_lock_init(&bochs->fb.dirty_lock);
|
||||||
|
|
||||||
|
ret = drm_fb_helper_init(bochs->dev, &bochs->fb.helper,
|
||||||
|
1, 1);
|
||||||
|
if (ret)
|
||||||
|
return ret;
|
||||||
|
|
||||||
|
drm_fb_helper_single_add_all_connectors(&bochs->fb.helper);
|
||||||
|
drm_helper_disable_unused_functions(bochs->dev);
|
||||||
|
drm_fb_helper_initial_config(&bochs->fb.helper, 32);
|
||||||
|
|
||||||
|
bochs->fb.initialized = true;
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
void bochs_fbdev_fini(struct bochs_device *bochs)
|
||||||
|
{
|
||||||
|
if (!bochs->fb.initialized)
|
||||||
|
return;
|
||||||
|
|
||||||
|
bochs_fbdev_destroy(bochs);
|
||||||
|
bochs->fb.initialized = false;
|
||||||
|
}
|
||||||
177
drivers/gpu/drm/bochs/bochs_hw.c
Normal file
177
drivers/gpu/drm/bochs/bochs_hw.c
Normal file
@ -0,0 +1,177 @@
|
|||||||
|
/*
|
||||||
|
* This program is free software; you can redistribute it and/or modify
|
||||||
|
* it under the terms of the GNU General Public License as published by
|
||||||
|
* the Free Software Foundation; either version 2 of the License, or
|
||||||
|
* (at your option) any later version.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include "bochs.h"
|
||||||
|
|
||||||
|
/* ---------------------------------------------------------------------- */
|
||||||
|
|
||||||
|
static void bochs_vga_writeb(struct bochs_device *bochs, u16 ioport, u8 val)
|
||||||
|
{
|
||||||
|
if (WARN_ON(ioport < 0x3c0 || ioport > 0x3df))
|
||||||
|
return;
|
||||||
|
|
||||||
|
if (bochs->mmio) {
|
||||||
|
int offset = ioport - 0x3c0 + 0x400;
|
||||||
|
writeb(val, bochs->mmio + offset);
|
||||||
|
} else {
|
||||||
|
outb(val, ioport);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
static u16 bochs_dispi_read(struct bochs_device *bochs, u16 reg)
|
||||||
|
{
|
||||||
|
u16 ret = 0;
|
||||||
|
|
||||||
|
if (bochs->mmio) {
|
||||||
|
int offset = 0x500 + (reg << 1);
|
||||||
|
ret = readw(bochs->mmio + offset);
|
||||||
|
} else {
|
||||||
|
outw(reg, VBE_DISPI_IOPORT_INDEX);
|
||||||
|
ret = inw(VBE_DISPI_IOPORT_DATA);
|
||||||
|
}
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void bochs_dispi_write(struct bochs_device *bochs, u16 reg, u16 val)
|
||||||
|
{
|
||||||
|
if (bochs->mmio) {
|
||||||
|
int offset = 0x500 + (reg << 1);
|
||||||
|
writew(val, bochs->mmio + offset);
|
||||||
|
} else {
|
||||||
|
outw(reg, VBE_DISPI_IOPORT_INDEX);
|
||||||
|
outw(val, VBE_DISPI_IOPORT_DATA);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
int bochs_hw_init(struct drm_device *dev, uint32_t flags)
|
||||||
|
{
|
||||||
|
struct bochs_device *bochs = dev->dev_private;
|
||||||
|
struct pci_dev *pdev = dev->pdev;
|
||||||
|
unsigned long addr, size, mem, ioaddr, iosize;
|
||||||
|
u16 id;
|
||||||
|
|
||||||
|
if (/* (ent->driver_data == BOCHS_QEMU_STDVGA) && */
|
||||||
|
(pdev->resource[2].flags & IORESOURCE_MEM)) {
|
||||||
|
/* mmio bar with vga and bochs registers present */
|
||||||
|
if (pci_request_region(pdev, 2, "bochs-drm") != 0) {
|
||||||
|
DRM_ERROR("Cannot request mmio region\n");
|
||||||
|
return -EBUSY;
|
||||||
|
}
|
||||||
|
ioaddr = pci_resource_start(pdev, 2);
|
||||||
|
iosize = pci_resource_len(pdev, 2);
|
||||||
|
bochs->mmio = ioremap(ioaddr, iosize);
|
||||||
|
if (bochs->mmio == NULL) {
|
||||||
|
DRM_ERROR("Cannot map mmio region\n");
|
||||||
|
return -ENOMEM;
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
ioaddr = VBE_DISPI_IOPORT_INDEX;
|
||||||
|
iosize = 2;
|
||||||
|
if (!request_region(ioaddr, iosize, "bochs-drm")) {
|
||||||
|
DRM_ERROR("Cannot request ioports\n");
|
||||||
|
return -EBUSY;
|
||||||
|
}
|
||||||
|
bochs->ioports = 1;
|
||||||
|
}
|
||||||
|
|
||||||
|
id = bochs_dispi_read(bochs, VBE_DISPI_INDEX_ID);
|
||||||
|
mem = bochs_dispi_read(bochs, VBE_DISPI_INDEX_VIDEO_MEMORY_64K)
|
||||||
|
* 64 * 1024;
|
||||||
|
if ((id & 0xfff0) != VBE_DISPI_ID0) {
|
||||||
|
DRM_ERROR("ID mismatch\n");
|
||||||
|
return -ENODEV;
|
||||||
|
}
|
||||||
|
|
||||||
|
if ((pdev->resource[0].flags & IORESOURCE_MEM) == 0)
|
||||||
|
return -ENODEV;
|
||||||
|
addr = pci_resource_start(pdev, 0);
|
||||||
|
size = pci_resource_len(pdev, 0);
|
||||||
|
if (addr == 0)
|
||||||
|
return -ENODEV;
|
||||||
|
if (size != mem) {
|
||||||
|
DRM_ERROR("Size mismatch: pci=%ld, bochs=%ld\n",
|
||||||
|
size, mem);
|
||||||
|
size = min(size, mem);
|
||||||
|
}
|
||||||
|
|
||||||
|
if (pci_request_region(pdev, 0, "bochs-drm") != 0) {
|
||||||
|
DRM_ERROR("Cannot request framebuffer\n");
|
||||||
|
return -EBUSY;
|
||||||
|
}
|
||||||
|
|
||||||
|
bochs->fb_map = ioremap(addr, size);
|
||||||
|
if (bochs->fb_map == NULL) {
|
||||||
|
DRM_ERROR("Cannot map framebuffer\n");
|
||||||
|
return -ENOMEM;
|
||||||
|
}
|
||||||
|
bochs->fb_base = addr;
|
||||||
|
bochs->fb_size = size;
|
||||||
|
|
||||||
|
DRM_INFO("Found bochs VGA, ID 0x%x.\n", id);
|
||||||
|
DRM_INFO("Framebuffer size %ld kB @ 0x%lx, %s @ 0x%lx.\n",
|
||||||
|
size / 1024, addr,
|
||||||
|
bochs->ioports ? "ioports" : "mmio",
|
||||||
|
ioaddr);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
void bochs_hw_fini(struct drm_device *dev)
|
||||||
|
{
|
||||||
|
struct bochs_device *bochs = dev->dev_private;
|
||||||
|
|
||||||
|
if (bochs->mmio)
|
||||||
|
iounmap(bochs->mmio);
|
||||||
|
if (bochs->ioports)
|
||||||
|
release_region(VBE_DISPI_IOPORT_INDEX, 2);
|
||||||
|
if (bochs->fb_map)
|
||||||
|
iounmap(bochs->fb_map);
|
||||||
|
pci_release_regions(dev->pdev);
|
||||||
|
}
|
||||||
|
|
||||||
|
void bochs_hw_setmode(struct bochs_device *bochs,
|
||||||
|
struct drm_display_mode *mode)
|
||||||
|
{
|
||||||
|
bochs->xres = mode->hdisplay;
|
||||||
|
bochs->yres = mode->vdisplay;
|
||||||
|
bochs->bpp = 32;
|
||||||
|
bochs->stride = mode->hdisplay * (bochs->bpp / 8);
|
||||||
|
bochs->yres_virtual = bochs->fb_size / bochs->stride;
|
||||||
|
|
||||||
|
DRM_DEBUG_DRIVER("%dx%d @ %d bpp, vy %d\n",
|
||||||
|
bochs->xres, bochs->yres, bochs->bpp,
|
||||||
|
bochs->yres_virtual);
|
||||||
|
|
||||||
|
bochs_vga_writeb(bochs, 0x3c0, 0x20); /* unblank */
|
||||||
|
|
||||||
|
bochs_dispi_write(bochs, VBE_DISPI_INDEX_BPP, bochs->bpp);
|
||||||
|
bochs_dispi_write(bochs, VBE_DISPI_INDEX_XRES, bochs->xres);
|
||||||
|
bochs_dispi_write(bochs, VBE_DISPI_INDEX_YRES, bochs->yres);
|
||||||
|
bochs_dispi_write(bochs, VBE_DISPI_INDEX_BANK, 0);
|
||||||
|
bochs_dispi_write(bochs, VBE_DISPI_INDEX_VIRT_WIDTH, bochs->xres);
|
||||||
|
bochs_dispi_write(bochs, VBE_DISPI_INDEX_VIRT_HEIGHT,
|
||||||
|
bochs->yres_virtual);
|
||||||
|
bochs_dispi_write(bochs, VBE_DISPI_INDEX_X_OFFSET, 0);
|
||||||
|
bochs_dispi_write(bochs, VBE_DISPI_INDEX_Y_OFFSET, 0);
|
||||||
|
|
||||||
|
bochs_dispi_write(bochs, VBE_DISPI_INDEX_ENABLE,
|
||||||
|
VBE_DISPI_ENABLED | VBE_DISPI_LFB_ENABLED);
|
||||||
|
}
|
||||||
|
|
||||||
|
void bochs_hw_setbase(struct bochs_device *bochs,
|
||||||
|
int x, int y, u64 addr)
|
||||||
|
{
|
||||||
|
unsigned long offset = (unsigned long)addr +
|
||||||
|
y * bochs->stride +
|
||||||
|
x * (bochs->bpp / 8);
|
||||||
|
int vy = offset / bochs->stride;
|
||||||
|
int vx = (offset % bochs->stride) * 8 / bochs->bpp;
|
||||||
|
|
||||||
|
DRM_DEBUG_DRIVER("x %d, y %d, addr %llx -> offset %lx, vx %d, vy %d\n",
|
||||||
|
x, y, addr, offset, vx, vy);
|
||||||
|
bochs_dispi_write(bochs, VBE_DISPI_INDEX_X_OFFSET, vx);
|
||||||
|
bochs_dispi_write(bochs, VBE_DISPI_INDEX_Y_OFFSET, vy);
|
||||||
|
}
|
||||||
294
drivers/gpu/drm/bochs/bochs_kms.c
Normal file
294
drivers/gpu/drm/bochs/bochs_kms.c
Normal file
@ -0,0 +1,294 @@
|
|||||||
|
/*
|
||||||
|
* This program is free software; you can redistribute it and/or modify
|
||||||
|
* it under the terms of the GNU General Public License as published by
|
||||||
|
* the Free Software Foundation; either version 2 of the License, or
|
||||||
|
* (at your option) any later version.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include "bochs.h"
|
||||||
|
|
||||||
|
static int defx = 1024;
|
||||||
|
static int defy = 768;
|
||||||
|
|
||||||
|
module_param(defx, int, 0444);
|
||||||
|
module_param(defy, int, 0444);
|
||||||
|
MODULE_PARM_DESC(defx, "default x resolution");
|
||||||
|
MODULE_PARM_DESC(defy, "default y resolution");
|
||||||
|
|
||||||
|
/* ---------------------------------------------------------------------- */
|
||||||
|
|
||||||
|
static void bochs_crtc_load_lut(struct drm_crtc *crtc)
|
||||||
|
{
|
||||||
|
}
|
||||||
|
|
||||||
|
static void bochs_crtc_dpms(struct drm_crtc *crtc, int mode)
|
||||||
|
{
|
||||||
|
switch (mode) {
|
||||||
|
case DRM_MODE_DPMS_ON:
|
||||||
|
case DRM_MODE_DPMS_STANDBY:
|
||||||
|
case DRM_MODE_DPMS_SUSPEND:
|
||||||
|
case DRM_MODE_DPMS_OFF:
|
||||||
|
default:
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
static bool bochs_crtc_mode_fixup(struct drm_crtc *crtc,
|
||||||
|
const struct drm_display_mode *mode,
|
||||||
|
struct drm_display_mode *adjusted_mode)
|
||||||
|
{
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int bochs_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
|
||||||
|
struct drm_framebuffer *old_fb)
|
||||||
|
{
|
||||||
|
struct bochs_device *bochs =
|
||||||
|
container_of(crtc, struct bochs_device, crtc);
|
||||||
|
struct bochs_framebuffer *bochs_fb;
|
||||||
|
struct bochs_bo *bo;
|
||||||
|
u64 gpu_addr = 0;
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
if (old_fb) {
|
||||||
|
bochs_fb = to_bochs_framebuffer(old_fb);
|
||||||
|
bo = gem_to_bochs_bo(bochs_fb->obj);
|
||||||
|
ret = ttm_bo_reserve(&bo->bo, true, false, false, 0);
|
||||||
|
if (ret) {
|
||||||
|
DRM_ERROR("failed to reserve old_fb bo\n");
|
||||||
|
} else {
|
||||||
|
bochs_bo_unpin(bo);
|
||||||
|
ttm_bo_unreserve(&bo->bo);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
if (WARN_ON(crtc->fb == NULL))
|
||||||
|
return -EINVAL;
|
||||||
|
|
||||||
|
bochs_fb = to_bochs_framebuffer(crtc->fb);
|
||||||
|
bo = gem_to_bochs_bo(bochs_fb->obj);
|
||||||
|
ret = ttm_bo_reserve(&bo->bo, true, false, false, 0);
|
||||||
|
if (ret)
|
||||||
|
return ret;
|
||||||
|
|
||||||
|
ret = bochs_bo_pin(bo, TTM_PL_FLAG_VRAM, &gpu_addr);
|
||||||
|
if (ret) {
|
||||||
|
ttm_bo_unreserve(&bo->bo);
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
ttm_bo_unreserve(&bo->bo);
|
||||||
|
bochs_hw_setbase(bochs, x, y, gpu_addr);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int bochs_crtc_mode_set(struct drm_crtc *crtc,
|
||||||
|
struct drm_display_mode *mode,
|
||||||
|
struct drm_display_mode *adjusted_mode,
|
||||||
|
int x, int y, struct drm_framebuffer *old_fb)
|
||||||
|
{
|
||||||
|
struct bochs_device *bochs =
|
||||||
|
container_of(crtc, struct bochs_device, crtc);
|
||||||
|
|
||||||
|
bochs_hw_setmode(bochs, mode);
|
||||||
|
bochs_crtc_mode_set_base(crtc, x, y, old_fb);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void bochs_crtc_prepare(struct drm_crtc *crtc)
|
||||||
|
{
|
||||||
|
}
|
||||||
|
|
||||||
|
static void bochs_crtc_commit(struct drm_crtc *crtc)
|
||||||
|
{
|
||||||
|
}
|
||||||
|
|
||||||
|
static void bochs_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
|
||||||
|
u16 *blue, uint32_t start, uint32_t size)
|
||||||
|
{
|
||||||
|
}
|
||||||
|
|
||||||
|
/* These provide the minimum set of functions required to handle a CRTC */
|
||||||
|
static const struct drm_crtc_funcs bochs_crtc_funcs = {
|
||||||
|
.gamma_set = bochs_crtc_gamma_set,
|
||||||
|
.set_config = drm_crtc_helper_set_config,
|
||||||
|
.destroy = drm_crtc_cleanup,
|
||||||
|
};
|
||||||
|
|
||||||
|
static const struct drm_crtc_helper_funcs bochs_helper_funcs = {
|
||||||
|
.dpms = bochs_crtc_dpms,
|
||||||
|
.mode_fixup = bochs_crtc_mode_fixup,
|
||||||
|
.mode_set = bochs_crtc_mode_set,
|
||||||
|
.mode_set_base = bochs_crtc_mode_set_base,
|
||||||
|
.prepare = bochs_crtc_prepare,
|
||||||
|
.commit = bochs_crtc_commit,
|
||||||
|
.load_lut = bochs_crtc_load_lut,
|
||||||
|
};
|
||||||
|
|
||||||
|
static void bochs_crtc_init(struct drm_device *dev)
|
||||||
|
{
|
||||||
|
struct bochs_device *bochs = dev->dev_private;
|
||||||
|
struct drm_crtc *crtc = &bochs->crtc;
|
||||||
|
|
||||||
|
drm_crtc_init(dev, crtc, &bochs_crtc_funcs);
|
||||||
|
drm_mode_crtc_set_gamma_size(crtc, 256);
|
||||||
|
drm_crtc_helper_add(crtc, &bochs_helper_funcs);
|
||||||
|
}
|
||||||
|
|
||||||
|
static bool bochs_encoder_mode_fixup(struct drm_encoder *encoder,
|
||||||
|
const struct drm_display_mode *mode,
|
||||||
|
struct drm_display_mode *adjusted_mode)
|
||||||
|
{
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void bochs_encoder_mode_set(struct drm_encoder *encoder,
|
||||||
|
struct drm_display_mode *mode,
|
||||||
|
struct drm_display_mode *adjusted_mode)
|
||||||
|
{
|
||||||
|
}
|
||||||
|
|
||||||
|
static void bochs_encoder_dpms(struct drm_encoder *encoder, int state)
|
||||||
|
{
|
||||||
|
}
|
||||||
|
|
||||||
|
static void bochs_encoder_prepare(struct drm_encoder *encoder)
|
||||||
|
{
|
||||||
|
}
|
||||||
|
|
||||||
|
static void bochs_encoder_commit(struct drm_encoder *encoder)
|
||||||
|
{
|
||||||
|
}
|
||||||
|
|
||||||
|
static const struct drm_encoder_helper_funcs bochs_encoder_helper_funcs = {
|
||||||
|
.dpms = bochs_encoder_dpms,
|
||||||
|
.mode_fixup = bochs_encoder_mode_fixup,
|
||||||
|
.mode_set = bochs_encoder_mode_set,
|
||||||
|
.prepare = bochs_encoder_prepare,
|
||||||
|
.commit = bochs_encoder_commit,
|
||||||
|
};
|
||||||
|
|
||||||
|
static const struct drm_encoder_funcs bochs_encoder_encoder_funcs = {
|
||||||
|
.destroy = drm_encoder_cleanup,
|
||||||
|
};
|
||||||
|
|
||||||
|
static void bochs_encoder_init(struct drm_device *dev)
|
||||||
|
{
|
||||||
|
struct bochs_device *bochs = dev->dev_private;
|
||||||
|
struct drm_encoder *encoder = &bochs->encoder;
|
||||||
|
|
||||||
|
encoder->possible_crtcs = 0x1;
|
||||||
|
drm_encoder_init(dev, encoder, &bochs_encoder_encoder_funcs,
|
||||||
|
DRM_MODE_ENCODER_DAC);
|
||||||
|
drm_encoder_helper_add(encoder, &bochs_encoder_helper_funcs);
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
int bochs_connector_get_modes(struct drm_connector *connector)
|
||||||
|
{
|
||||||
|
int count;
|
||||||
|
|
||||||
|
count = drm_add_modes_noedid(connector, 8192, 8192);
|
||||||
|
drm_set_preferred_mode(connector, defx, defy);
|
||||||
|
return count;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int bochs_connector_mode_valid(struct drm_connector *connector,
|
||||||
|
struct drm_display_mode *mode)
|
||||||
|
{
|
||||||
|
struct bochs_device *bochs =
|
||||||
|
container_of(connector, struct bochs_device, connector);
|
||||||
|
unsigned long size = mode->hdisplay * mode->vdisplay * 4;
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Make sure we can fit two framebuffers into video memory.
|
||||||
|
* This allows up to 1600x1200 with 16 MB (default size).
|
||||||
|
* If you want more try this:
|
||||||
|
* 'qemu -vga std -global VGA.vgamem_mb=32 $otherargs'
|
||||||
|
*/
|
||||||
|
if (size * 2 > bochs->fb_size)
|
||||||
|
return MODE_BAD;
|
||||||
|
|
||||||
|
return MODE_OK;
|
||||||
|
}
|
||||||
|
|
||||||
|
static struct drm_encoder *
|
||||||
|
bochs_connector_best_encoder(struct drm_connector *connector)
|
||||||
|
{
|
||||||
|
int enc_id = connector->encoder_ids[0];
|
||||||
|
struct drm_mode_object *obj;
|
||||||
|
struct drm_encoder *encoder;
|
||||||
|
|
||||||
|
/* pick the encoder ids */
|
||||||
|
if (enc_id) {
|
||||||
|
obj = drm_mode_object_find(connector->dev, enc_id,
|
||||||
|
DRM_MODE_OBJECT_ENCODER);
|
||||||
|
if (!obj)
|
||||||
|
return NULL;
|
||||||
|
encoder = obj_to_encoder(obj);
|
||||||
|
return encoder;
|
||||||
|
}
|
||||||
|
return NULL;
|
||||||
|
}
|
||||||
|
|
||||||
|
static enum drm_connector_status bochs_connector_detect(struct drm_connector
|
||||||
|
*connector, bool force)
|
||||||
|
{
|
||||||
|
return connector_status_connected;
|
||||||
|
}
|
||||||
|
|
||||||
|
struct drm_connector_helper_funcs bochs_connector_connector_helper_funcs = {
|
||||||
|
.get_modes = bochs_connector_get_modes,
|
||||||
|
.mode_valid = bochs_connector_mode_valid,
|
||||||
|
.best_encoder = bochs_connector_best_encoder,
|
||||||
|
};
|
||||||
|
|
||||||
|
struct drm_connector_funcs bochs_connector_connector_funcs = {
|
||||||
|
.dpms = drm_helper_connector_dpms,
|
||||||
|
.detect = bochs_connector_detect,
|
||||||
|
.fill_modes = drm_helper_probe_single_connector_modes,
|
||||||
|
.destroy = drm_connector_cleanup,
|
||||||
|
};
|
||||||
|
|
||||||
|
static void bochs_connector_init(struct drm_device *dev)
|
||||||
|
{
|
||||||
|
struct bochs_device *bochs = dev->dev_private;
|
||||||
|
struct drm_connector *connector = &bochs->connector;
|
||||||
|
|
||||||
|
drm_connector_init(dev, connector, &bochs_connector_connector_funcs,
|
||||||
|
DRM_MODE_CONNECTOR_VIRTUAL);
|
||||||
|
drm_connector_helper_add(connector,
|
||||||
|
&bochs_connector_connector_helper_funcs);
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
int bochs_kms_init(struct bochs_device *bochs)
|
||||||
|
{
|
||||||
|
drm_mode_config_init(bochs->dev);
|
||||||
|
bochs->mode_config_initialized = true;
|
||||||
|
|
||||||
|
bochs->dev->mode_config.max_width = 8192;
|
||||||
|
bochs->dev->mode_config.max_height = 8192;
|
||||||
|
|
||||||
|
bochs->dev->mode_config.fb_base = bochs->fb_base;
|
||||||
|
bochs->dev->mode_config.preferred_depth = 24;
|
||||||
|
bochs->dev->mode_config.prefer_shadow = 0;
|
||||||
|
|
||||||
|
bochs->dev->mode_config.funcs = (void *)&bochs_mode_funcs;
|
||||||
|
|
||||||
|
bochs_crtc_init(bochs->dev);
|
||||||
|
bochs_encoder_init(bochs->dev);
|
||||||
|
bochs_connector_init(bochs->dev);
|
||||||
|
drm_mode_connector_attach_encoder(&bochs->connector,
|
||||||
|
&bochs->encoder);
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
void bochs_kms_fini(struct bochs_device *bochs)
|
||||||
|
{
|
||||||
|
if (bochs->mode_config_initialized) {
|
||||||
|
drm_mode_config_cleanup(bochs->dev);
|
||||||
|
bochs->mode_config_initialized = false;
|
||||||
|
}
|
||||||
|
}
|
||||||
546
drivers/gpu/drm/bochs/bochs_mm.c
Normal file
546
drivers/gpu/drm/bochs/bochs_mm.c
Normal file
@ -0,0 +1,546 @@
|
|||||||
|
/*
|
||||||
|
* This program is free software; you can redistribute it and/or modify
|
||||||
|
* it under the terms of the GNU General Public License as published by
|
||||||
|
* the Free Software Foundation; either version 2 of the License, or
|
||||||
|
* (at your option) any later version.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include "bochs.h"
|
||||||
|
|
||||||
|
static void bochs_ttm_placement(struct bochs_bo *bo, int domain);
|
||||||
|
|
||||||
|
/* ---------------------------------------------------------------------- */
|
||||||
|
|
||||||
|
static inline struct bochs_device *bochs_bdev(struct ttm_bo_device *bd)
|
||||||
|
{
|
||||||
|
return container_of(bd, struct bochs_device, ttm.bdev);
|
||||||
|
}
|
||||||
|
|
||||||
|
static int bochs_ttm_mem_global_init(struct drm_global_reference *ref)
|
||||||
|
{
|
||||||
|
return ttm_mem_global_init(ref->object);
|
||||||
|
}
|
||||||
|
|
||||||
|
static void bochs_ttm_mem_global_release(struct drm_global_reference *ref)
|
||||||
|
{
|
||||||
|
ttm_mem_global_release(ref->object);
|
||||||
|
}
|
||||||
|
|
||||||
|
static int bochs_ttm_global_init(struct bochs_device *bochs)
|
||||||
|
{
|
||||||
|
struct drm_global_reference *global_ref;
|
||||||
|
int r;
|
||||||
|
|
||||||
|
global_ref = &bochs->ttm.mem_global_ref;
|
||||||
|
global_ref->global_type = DRM_GLOBAL_TTM_MEM;
|
||||||
|
global_ref->size = sizeof(struct ttm_mem_global);
|
||||||
|
global_ref->init = &bochs_ttm_mem_global_init;
|
||||||
|
global_ref->release = &bochs_ttm_mem_global_release;
|
||||||
|
r = drm_global_item_ref(global_ref);
|
||||||
|
if (r != 0) {
|
||||||
|
DRM_ERROR("Failed setting up TTM memory accounting "
|
||||||
|
"subsystem.\n");
|
||||||
|
return r;
|
||||||
|
}
|
||||||
|
|
||||||
|
bochs->ttm.bo_global_ref.mem_glob =
|
||||||
|
bochs->ttm.mem_global_ref.object;
|
||||||
|
global_ref = &bochs->ttm.bo_global_ref.ref;
|
||||||
|
global_ref->global_type = DRM_GLOBAL_TTM_BO;
|
||||||
|
global_ref->size = sizeof(struct ttm_bo_global);
|
||||||
|
global_ref->init = &ttm_bo_global_init;
|
||||||
|
global_ref->release = &ttm_bo_global_release;
|
||||||
|
r = drm_global_item_ref(global_ref);
|
||||||
|
if (r != 0) {
|
||||||
|
DRM_ERROR("Failed setting up TTM BO subsystem.\n");
|
||||||
|
drm_global_item_unref(&bochs->ttm.mem_global_ref);
|
||||||
|
return r;
|
||||||
|
}
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void bochs_ttm_global_release(struct bochs_device *bochs)
|
||||||
|
{
|
||||||
|
if (bochs->ttm.mem_global_ref.release == NULL)
|
||||||
|
return;
|
||||||
|
|
||||||
|
drm_global_item_unref(&bochs->ttm.bo_global_ref.ref);
|
||||||
|
drm_global_item_unref(&bochs->ttm.mem_global_ref);
|
||||||
|
bochs->ttm.mem_global_ref.release = NULL;
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
static void bochs_bo_ttm_destroy(struct ttm_buffer_object *tbo)
|
||||||
|
{
|
||||||
|
struct bochs_bo *bo;
|
||||||
|
|
||||||
|
bo = container_of(tbo, struct bochs_bo, bo);
|
||||||
|
drm_gem_object_release(&bo->gem);
|
||||||
|
kfree(bo);
|
||||||
|
}
|
||||||
|
|
||||||
|
static bool bochs_ttm_bo_is_bochs_bo(struct ttm_buffer_object *bo)
|
||||||
|
{
|
||||||
|
if (bo->destroy == &bochs_bo_ttm_destroy)
|
||||||
|
return true;
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int bochs_bo_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
|
||||||
|
struct ttm_mem_type_manager *man)
|
||||||
|
{
|
||||||
|
switch (type) {
|
||||||
|
case TTM_PL_SYSTEM:
|
||||||
|
man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
|
||||||
|
man->available_caching = TTM_PL_MASK_CACHING;
|
||||||
|
man->default_caching = TTM_PL_FLAG_CACHED;
|
||||||
|
break;
|
||||||
|
case TTM_PL_VRAM:
|
||||||
|
man->func = &ttm_bo_manager_func;
|
||||||
|
man->flags = TTM_MEMTYPE_FLAG_FIXED |
|
||||||
|
TTM_MEMTYPE_FLAG_MAPPABLE;
|
||||||
|
man->available_caching = TTM_PL_FLAG_UNCACHED |
|
||||||
|
TTM_PL_FLAG_WC;
|
||||||
|
man->default_caching = TTM_PL_FLAG_WC;
|
||||||
|
break;
|
||||||
|
default:
|
||||||
|
DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
|
||||||
|
return -EINVAL;
|
||||||
|
}
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void
|
||||||
|
bochs_bo_evict_flags(struct ttm_buffer_object *bo, struct ttm_placement *pl)
|
||||||
|
{
|
||||||
|
struct bochs_bo *bochsbo = bochs_bo(bo);
|
||||||
|
|
||||||
|
if (!bochs_ttm_bo_is_bochs_bo(bo))
|
||||||
|
return;
|
||||||
|
|
||||||
|
bochs_ttm_placement(bochsbo, TTM_PL_FLAG_SYSTEM);
|
||||||
|
*pl = bochsbo->placement;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int bochs_bo_verify_access(struct ttm_buffer_object *bo,
|
||||||
|
struct file *filp)
|
||||||
|
{
|
||||||
|
struct bochs_bo *bochsbo = bochs_bo(bo);
|
||||||
|
|
||||||
|
return drm_vma_node_verify_access(&bochsbo->gem.vma_node, filp);
|
||||||
|
}
|
||||||
|
|
||||||
|
static int bochs_ttm_io_mem_reserve(struct ttm_bo_device *bdev,
|
||||||
|
struct ttm_mem_reg *mem)
|
||||||
|
{
|
||||||
|
struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
|
||||||
|
struct bochs_device *bochs = bochs_bdev(bdev);
|
||||||
|
|
||||||
|
mem->bus.addr = NULL;
|
||||||
|
mem->bus.offset = 0;
|
||||||
|
mem->bus.size = mem->num_pages << PAGE_SHIFT;
|
||||||
|
mem->bus.base = 0;
|
||||||
|
mem->bus.is_iomem = false;
|
||||||
|
if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
|
||||||
|
return -EINVAL;
|
||||||
|
switch (mem->mem_type) {
|
||||||
|
case TTM_PL_SYSTEM:
|
||||||
|
/* system memory */
|
||||||
|
return 0;
|
||||||
|
case TTM_PL_VRAM:
|
||||||
|
mem->bus.offset = mem->start << PAGE_SHIFT;
|
||||||
|
mem->bus.base = bochs->fb_base;
|
||||||
|
mem->bus.is_iomem = true;
|
||||||
|
break;
|
||||||
|
default:
|
||||||
|
return -EINVAL;
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void bochs_ttm_io_mem_free(struct ttm_bo_device *bdev,
|
||||||
|
struct ttm_mem_reg *mem)
|
||||||
|
{
|
||||||
|
}
|
||||||
|
|
||||||
|
static int bochs_bo_move(struct ttm_buffer_object *bo,
|
||||||
|
bool evict, bool interruptible,
|
||||||
|
bool no_wait_gpu,
|
||||||
|
struct ttm_mem_reg *new_mem)
|
||||||
|
{
|
||||||
|
return ttm_bo_move_memcpy(bo, evict, no_wait_gpu, new_mem);
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
static void bochs_ttm_backend_destroy(struct ttm_tt *tt)
|
||||||
|
{
|
||||||
|
ttm_tt_fini(tt);
|
||||||
|
kfree(tt);
|
||||||
|
}
|
||||||
|
|
||||||
|
static struct ttm_backend_func bochs_tt_backend_func = {
|
||||||
|
.destroy = &bochs_ttm_backend_destroy,
|
||||||
|
};
|
||||||
|
|
||||||
|
static struct ttm_tt *bochs_ttm_tt_create(struct ttm_bo_device *bdev,
|
||||||
|
unsigned long size,
|
||||||
|
uint32_t page_flags,
|
||||||
|
struct page *dummy_read_page)
|
||||||
|
{
|
||||||
|
struct ttm_tt *tt;
|
||||||
|
|
||||||
|
tt = kzalloc(sizeof(struct ttm_tt), GFP_KERNEL);
|
||||||
|
if (tt == NULL)
|
||||||
|
return NULL;
|
||||||
|
tt->func = &bochs_tt_backend_func;
|
||||||
|
if (ttm_tt_init(tt, bdev, size, page_flags, dummy_read_page)) {
|
||||||
|
kfree(tt);
|
||||||
|
return NULL;
|
||||||
|
}
|
||||||
|
return tt;
|
||||||
|
}
|
||||||
|
|
||||||
|
struct ttm_bo_driver bochs_bo_driver = {
|
||||||
|
.ttm_tt_create = bochs_ttm_tt_create,
|
||||||
|
.ttm_tt_populate = ttm_pool_populate,
|
||||||
|
.ttm_tt_unpopulate = ttm_pool_unpopulate,
|
||||||
|
.init_mem_type = bochs_bo_init_mem_type,
|
||||||
|
.evict_flags = bochs_bo_evict_flags,
|
||||||
|
.move = bochs_bo_move,
|
||||||
|
.verify_access = bochs_bo_verify_access,
|
||||||
|
.io_mem_reserve = &bochs_ttm_io_mem_reserve,
|
||||||
|
.io_mem_free = &bochs_ttm_io_mem_free,
|
||||||
|
};
|
||||||
|
|
||||||
|
int bochs_mm_init(struct bochs_device *bochs)
|
||||||
|
{
|
||||||
|
struct ttm_bo_device *bdev = &bochs->ttm.bdev;
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
ret = bochs_ttm_global_init(bochs);
|
||||||
|
if (ret)
|
||||||
|
return ret;
|
||||||
|
|
||||||
|
ret = ttm_bo_device_init(&bochs->ttm.bdev,
|
||||||
|
bochs->ttm.bo_global_ref.ref.object,
|
||||||
|
&bochs_bo_driver, DRM_FILE_PAGE_OFFSET,
|
||||||
|
true);
|
||||||
|
if (ret) {
|
||||||
|
DRM_ERROR("Error initialising bo driver; %d\n", ret);
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM,
|
||||||
|
bochs->fb_size >> PAGE_SHIFT);
|
||||||
|
if (ret) {
|
||||||
|
DRM_ERROR("Failed ttm VRAM init: %d\n", ret);
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
bochs->ttm.initialized = true;
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
void bochs_mm_fini(struct bochs_device *bochs)
|
||||||
|
{
|
||||||
|
if (!bochs->ttm.initialized)
|
||||||
|
return;
|
||||||
|
|
||||||
|
ttm_bo_device_release(&bochs->ttm.bdev);
|
||||||
|
bochs_ttm_global_release(bochs);
|
||||||
|
bochs->ttm.initialized = false;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void bochs_ttm_placement(struct bochs_bo *bo, int domain)
|
||||||
|
{
|
||||||
|
u32 c = 0;
|
||||||
|
bo->placement.fpfn = 0;
|
||||||
|
bo->placement.lpfn = 0;
|
||||||
|
bo->placement.placement = bo->placements;
|
||||||
|
bo->placement.busy_placement = bo->placements;
|
||||||
|
if (domain & TTM_PL_FLAG_VRAM) {
|
||||||
|
bo->placements[c++] = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED
|
||||||
|
| TTM_PL_FLAG_VRAM;
|
||||||
|
}
|
||||||
|
if (domain & TTM_PL_FLAG_SYSTEM) {
|
||||||
|
bo->placements[c++] = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
|
||||||
|
}
|
||||||
|
if (!c) {
|
||||||
|
bo->placements[c++] = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
|
||||||
|
}
|
||||||
|
bo->placement.num_placement = c;
|
||||||
|
bo->placement.num_busy_placement = c;
|
||||||
|
}
|
||||||
|
|
||||||
|
static inline u64 bochs_bo_gpu_offset(struct bochs_bo *bo)
|
||||||
|
{
|
||||||
|
return bo->bo.offset;
|
||||||
|
}
|
||||||
|
|
||||||
|
int bochs_bo_pin(struct bochs_bo *bo, u32 pl_flag, u64 *gpu_addr)
|
||||||
|
{
|
||||||
|
int i, ret;
|
||||||
|
|
||||||
|
if (bo->pin_count) {
|
||||||
|
bo->pin_count++;
|
||||||
|
if (gpu_addr)
|
||||||
|
*gpu_addr = bochs_bo_gpu_offset(bo);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
bochs_ttm_placement(bo, pl_flag);
|
||||||
|
for (i = 0; i < bo->placement.num_placement; i++)
|
||||||
|
bo->placements[i] |= TTM_PL_FLAG_NO_EVICT;
|
||||||
|
ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
|
||||||
|
if (ret)
|
||||||
|
return ret;
|
||||||
|
|
||||||
|
bo->pin_count = 1;
|
||||||
|
if (gpu_addr)
|
||||||
|
*gpu_addr = bochs_bo_gpu_offset(bo);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
int bochs_bo_unpin(struct bochs_bo *bo)
|
||||||
|
{
|
||||||
|
int i, ret;
|
||||||
|
|
||||||
|
if (!bo->pin_count) {
|
||||||
|
DRM_ERROR("unpin bad %p\n", bo);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
bo->pin_count--;
|
||||||
|
|
||||||
|
if (bo->pin_count)
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
for (i = 0; i < bo->placement.num_placement; i++)
|
||||||
|
bo->placements[i] &= ~TTM_PL_FLAG_NO_EVICT;
|
||||||
|
ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
|
||||||
|
if (ret)
|
||||||
|
return ret;
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
int bochs_mmap(struct file *filp, struct vm_area_struct *vma)
|
||||||
|
{
|
||||||
|
struct drm_file *file_priv;
|
||||||
|
struct bochs_device *bochs;
|
||||||
|
|
||||||
|
if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
|
||||||
|
return drm_mmap(filp, vma);
|
||||||
|
|
||||||
|
file_priv = filp->private_data;
|
||||||
|
bochs = file_priv->minor->dev->dev_private;
|
||||||
|
return ttm_bo_mmap(filp, vma, &bochs->ttm.bdev);
|
||||||
|
}
|
||||||
|
|
||||||
|
/* ---------------------------------------------------------------------- */
|
||||||
|
|
||||||
|
static int bochs_bo_create(struct drm_device *dev, int size, int align,
|
||||||
|
uint32_t flags, struct bochs_bo **pbochsbo)
|
||||||
|
{
|
||||||
|
struct bochs_device *bochs = dev->dev_private;
|
||||||
|
struct bochs_bo *bochsbo;
|
||||||
|
size_t acc_size;
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
bochsbo = kzalloc(sizeof(struct bochs_bo), GFP_KERNEL);
|
||||||
|
if (!bochsbo)
|
||||||
|
return -ENOMEM;
|
||||||
|
|
||||||
|
ret = drm_gem_object_init(dev, &bochsbo->gem, size);
|
||||||
|
if (ret) {
|
||||||
|
kfree(bochsbo);
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
bochsbo->bo.bdev = &bochs->ttm.bdev;
|
||||||
|
bochsbo->bo.bdev->dev_mapping = dev->dev_mapping;
|
||||||
|
|
||||||
|
bochs_ttm_placement(bochsbo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);
|
||||||
|
|
||||||
|
acc_size = ttm_bo_dma_acc_size(&bochs->ttm.bdev, size,
|
||||||
|
sizeof(struct bochs_bo));
|
||||||
|
|
||||||
|
ret = ttm_bo_init(&bochs->ttm.bdev, &bochsbo->bo, size,
|
||||||
|
ttm_bo_type_device, &bochsbo->placement,
|
||||||
|
align >> PAGE_SHIFT, false, NULL, acc_size,
|
||||||
|
NULL, bochs_bo_ttm_destroy);
|
||||||
|
if (ret)
|
||||||
|
return ret;
|
||||||
|
|
||||||
|
*pbochsbo = bochsbo;
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
int bochs_gem_create(struct drm_device *dev, u32 size, bool iskernel,
|
||||||
|
struct drm_gem_object **obj)
|
||||||
|
{
|
||||||
|
struct bochs_bo *bochsbo;
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
*obj = NULL;
|
||||||
|
|
||||||
|
size = ALIGN(size, PAGE_SIZE);
|
||||||
|
if (size == 0)
|
||||||
|
return -EINVAL;
|
||||||
|
|
||||||
|
ret = bochs_bo_create(dev, size, 0, 0, &bochsbo);
|
||||||
|
if (ret) {
|
||||||
|
if (ret != -ERESTARTSYS)
|
||||||
|
DRM_ERROR("failed to allocate GEM object\n");
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
*obj = &bochsbo->gem;
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
int bochs_dumb_create(struct drm_file *file, struct drm_device *dev,
|
||||||
|
struct drm_mode_create_dumb *args)
|
||||||
|
{
|
||||||
|
struct drm_gem_object *gobj;
|
||||||
|
u32 handle;
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
args->pitch = args->width * ((args->bpp + 7) / 8);
|
||||||
|
args->size = args->pitch * args->height;
|
||||||
|
|
||||||
|
ret = bochs_gem_create(dev, args->size, false,
|
||||||
|
&gobj);
|
||||||
|
if (ret)
|
||||||
|
return ret;
|
||||||
|
|
||||||
|
ret = drm_gem_handle_create(file, gobj, &handle);
|
||||||
|
drm_gem_object_unreference_unlocked(gobj);
|
||||||
|
if (ret)
|
||||||
|
return ret;
|
||||||
|
|
||||||
|
args->handle = handle;
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void bochs_bo_unref(struct bochs_bo **bo)
|
||||||
|
{
|
||||||
|
struct ttm_buffer_object *tbo;
|
||||||
|
|
||||||
|
if ((*bo) == NULL)
|
||||||
|
return;
|
||||||
|
|
||||||
|
tbo = &((*bo)->bo);
|
||||||
|
ttm_bo_unref(&tbo);
|
||||||
|
if (tbo == NULL)
|
||||||
|
*bo = NULL;
|
||||||
|
|
||||||
|
}
|
||||||
|
|
||||||
|
void bochs_gem_free_object(struct drm_gem_object *obj)
|
||||||
|
{
|
||||||
|
struct bochs_bo *bochs_bo = gem_to_bochs_bo(obj);
|
||||||
|
|
||||||
|
if (!bochs_bo)
|
||||||
|
return;
|
||||||
|
bochs_bo_unref(&bochs_bo);
|
||||||
|
}
|
||||||
|
|
||||||
|
int bochs_dumb_mmap_offset(struct drm_file *file, struct drm_device *dev,
|
||||||
|
uint32_t handle, uint64_t *offset)
|
||||||
|
{
|
||||||
|
struct drm_gem_object *obj;
|
||||||
|
int ret;
|
||||||
|
struct bochs_bo *bo;
|
||||||
|
|
||||||
|
mutex_lock(&dev->struct_mutex);
|
||||||
|
obj = drm_gem_object_lookup(dev, file, handle);
|
||||||
|
if (obj == NULL) {
|
||||||
|
ret = -ENOENT;
|
||||||
|
goto out_unlock;
|
||||||
|
}
|
||||||
|
|
||||||
|
bo = gem_to_bochs_bo(obj);
|
||||||
|
*offset = bochs_bo_mmap_offset(bo);
|
||||||
|
|
||||||
|
drm_gem_object_unreference(obj);
|
||||||
|
ret = 0;
|
||||||
|
out_unlock:
|
||||||
|
mutex_unlock(&dev->struct_mutex);
|
||||||
|
return ret;
|
||||||
|
|
||||||
|
}
|
||||||
|
|
||||||
|
/* ---------------------------------------------------------------------- */
|
||||||
|
|
||||||
|
static void bochs_user_framebuffer_destroy(struct drm_framebuffer *fb)
|
||||||
|
{
|
||||||
|
struct bochs_framebuffer *bochs_fb = to_bochs_framebuffer(fb);
|
||||||
|
if (bochs_fb->obj)
|
||||||
|
drm_gem_object_unreference_unlocked(bochs_fb->obj);
|
||||||
|
drm_framebuffer_cleanup(fb);
|
||||||
|
kfree(fb);
|
||||||
|
}
|
||||||
|
|
||||||
|
static const struct drm_framebuffer_funcs bochs_fb_funcs = {
|
||||||
|
.destroy = bochs_user_framebuffer_destroy,
|
||||||
|
};
|
||||||
|
|
||||||
|
int bochs_framebuffer_init(struct drm_device *dev,
|
||||||
|
struct bochs_framebuffer *gfb,
|
||||||
|
struct drm_mode_fb_cmd2 *mode_cmd,
|
||||||
|
struct drm_gem_object *obj)
|
||||||
|
{
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
drm_helper_mode_fill_fb_struct(&gfb->base, mode_cmd);
|
||||||
|
gfb->obj = obj;
|
||||||
|
ret = drm_framebuffer_init(dev, &gfb->base, &bochs_fb_funcs);
|
||||||
|
if (ret) {
|
||||||
|
DRM_ERROR("drm_framebuffer_init failed: %d\n", ret);
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static struct drm_framebuffer *
|
||||||
|
bochs_user_framebuffer_create(struct drm_device *dev,
|
||||||
|
struct drm_file *filp,
|
||||||
|
struct drm_mode_fb_cmd2 *mode_cmd)
|
||||||
|
{
|
||||||
|
struct drm_gem_object *obj;
|
||||||
|
struct bochs_framebuffer *bochs_fb;
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
DRM_DEBUG_DRIVER("%dx%d, format %c%c%c%c\n",
|
||||||
|
mode_cmd->width, mode_cmd->height,
|
||||||
|
(mode_cmd->pixel_format) & 0xff,
|
||||||
|
(mode_cmd->pixel_format >> 8) & 0xff,
|
||||||
|
(mode_cmd->pixel_format >> 16) & 0xff,
|
||||||
|
(mode_cmd->pixel_format >> 24) & 0xff);
|
||||||
|
|
||||||
|
if (mode_cmd->pixel_format != DRM_FORMAT_XRGB8888)
|
||||||
|
return ERR_PTR(-ENOENT);
|
||||||
|
|
||||||
|
obj = drm_gem_object_lookup(dev, filp, mode_cmd->handles[0]);
|
||||||
|
if (obj == NULL)
|
||||||
|
return ERR_PTR(-ENOENT);
|
||||||
|
|
||||||
|
bochs_fb = kzalloc(sizeof(*bochs_fb), GFP_KERNEL);
|
||||||
|
if (!bochs_fb) {
|
||||||
|
drm_gem_object_unreference_unlocked(obj);
|
||||||
|
return ERR_PTR(-ENOMEM);
|
||||||
|
}
|
||||||
|
|
||||||
|
ret = bochs_framebuffer_init(dev, bochs_fb, mode_cmd, obj);
|
||||||
|
if (ret) {
|
||||||
|
drm_gem_object_unreference_unlocked(obj);
|
||||||
|
kfree(bochs_fb);
|
||||||
|
return ERR_PTR(ret);
|
||||||
|
}
|
||||||
|
return &bochs_fb->base;
|
||||||
|
}
|
||||||
|
|
||||||
|
const struct drm_mode_config_funcs bochs_mode_funcs = {
|
||||||
|
.fb_create = bochs_user_framebuffer_create,
|
||||||
|
};
|
||||||
Loading…
Reference in New Issue
Block a user