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drm/bochs: new driver

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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 2013-12-17 18:04:46 +01:00 committed by Dave Airlie
parent 859ae233cd
commit 0a6659bdc5
10 changed files with 1592 additions and 0 deletions
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2
drivers/gpu/drm/Kconfig
View file

@ -192,6 +192,8 @@ source "drivers/gpu/drm/tilcdc/Kconfig"
source "drivers/gpu/drm/qxl/Kconfig"
source "drivers/gpu/drm/bochs/Kconfig"
source "drivers/gpu/drm/msm/Kconfig"
source "drivers/gpu/drm/tegra/Kconfig"

1
drivers/gpu/drm/Makefile
View file

@ -58,6 +58,7 @@ obj-$(CONFIG_DRM_SHMOBILE) +=shmobile/
obj-$(CONFIG_DRM_OMAP) += omapdrm/
obj-$(CONFIG_DRM_TILCDC) += tilcdc/
obj-$(CONFIG_DRM_QXL) += qxl/
obj-$(CONFIG_DRM_BOCHS) += bochs/
obj-$(CONFIG_DRM_MSM) += msm/
obj-$(CONFIG_DRM_TEGRA) += tegra/
obj-y += i2c/

11
drivers/gpu/drm/bochs/Kconfig Normal file
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@ -0,0 +1,11 @@
config DRM_BOCHS
tristate "DRM Support for bochs dispi vga interface (qemu stdvga)"
depends on DRM && PCI
select DRM_KMS_HELPER
select FB_SYS_FILLRECT
select FB_SYS_COPYAREA
select FB_SYS_IMAGEBLIT
select DRM_TTM
help
Choose this option for qemu.
If M is selected the module will be called bochs-drm.

4
drivers/gpu/drm/bochs/Makefile Normal file
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@ -0,0 +1,4 @@
ccflags-y := -Iinclude/drm
bochs-drm-y := bochs_drv.o bochs_mm.o bochs_kms.o bochs_fbdev.o bochs_hw.o
obj-$(CONFIG_DRM_BOCHS) += bochs-drm.o

164
drivers/gpu/drm/bochs/bochs.h Normal file
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@ -0,0 +1,164 @@
#include <linux/io.h>
#include <linux/fb.h>
#include <drm/drmP.h>
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_fb_helper.h>
#include <ttm/ttm_bo_driver.h>
#include <ttm/ttm_page_alloc.h>
/* ---------------------------------------------------------------------- */
#define VBE_DISPI_IOPORT_INDEX 0x01CE
#define VBE_DISPI_IOPORT_DATA 0x01CF
#define VBE_DISPI_INDEX_ID 0x0
#define VBE_DISPI_INDEX_XRES 0x1
#define VBE_DISPI_INDEX_YRES 0x2
#define VBE_DISPI_INDEX_BPP 0x3
#define VBE_DISPI_INDEX_ENABLE 0x4
#define VBE_DISPI_INDEX_BANK 0x5
#define VBE_DISPI_INDEX_VIRT_WIDTH 0x6
#define VBE_DISPI_INDEX_VIRT_HEIGHT 0x7
#define VBE_DISPI_INDEX_X_OFFSET 0x8
#define VBE_DISPI_INDEX_Y_OFFSET 0x9
#define VBE_DISPI_INDEX_VIDEO_MEMORY_64K 0xa
#define VBE_DISPI_ID0 0xB0C0
#define VBE_DISPI_ID1 0xB0C1
#define VBE_DISPI_ID2 0xB0C2
#define VBE_DISPI_ID3 0xB0C3
#define VBE_DISPI_ID4 0xB0C4
#define VBE_DISPI_ID5 0xB0C5
#define VBE_DISPI_DISABLED 0x00
#define VBE_DISPI_ENABLED 0x01
#define VBE_DISPI_GETCAPS 0x02
#define VBE_DISPI_8BIT_DAC 0x20
#define VBE_DISPI_LFB_ENABLED 0x40
#define VBE_DISPI_NOCLEARMEM 0x80
/* ---------------------------------------------------------------------- */
enum bochs_types {
BOCHS_QEMU_STDVGA,
BOCHS_UNKNOWN,
};
struct bochs_framebuffer {
struct drm_framebuffer base;
struct drm_gem_object *obj;
};
struct bochs_device {
/* hw */
void __iomem *mmio;
int ioports;
void __iomem *fb_map;
unsigned long fb_base;
unsigned long fb_size;
/* mode */
u16 xres;
u16 yres;
u16 yres_virtual;
u32 stride;
u32 bpp;
/* drm */
struct drm_device *dev;
struct drm_crtc crtc;
struct drm_encoder encoder;
struct drm_connector connector;
bool mode_config_initialized;
/* ttm */
struct {
struct drm_global_reference mem_global_ref;
struct ttm_bo_global_ref bo_global_ref;
struct ttm_bo_device bdev;
bool initialized;
} ttm;
/* fbdev */
struct {
struct bochs_framebuffer gfb;
struct drm_fb_helper helper;
int size;
int x1, y1, x2, y2; /* dirty rect */
spinlock_t dirty_lock;
bool initialized;
} fb;
};
#define to_bochs_framebuffer(x) container_of(x, struct bochs_framebuffer, base)
struct bochs_bo {
struct ttm_buffer_object bo;
struct ttm_placement placement;
struct ttm_bo_kmap_obj kmap;
struct drm_gem_object gem;
u32 placements[3];
int pin_count;
};
static inline struct bochs_bo *bochs_bo(struct ttm_buffer_object *bo)
{
return container_of(bo, struct bochs_bo, bo);
}
static inline struct bochs_bo *gem_to_bochs_bo(struct drm_gem_object *gem)
{
return container_of(gem, struct bochs_bo, gem);
}
#define DRM_FILE_PAGE_OFFSET (0x100000000ULL >> PAGE_SHIFT)
static inline u64 bochs_bo_mmap_offset(struct bochs_bo *bo)
{
return drm_vma_node_offset_addr(&bo->bo.vma_node);
}
/* ---------------------------------------------------------------------- */
/* bochs_hw.c */
int bochs_hw_init(struct drm_device *dev, uint32_t flags);
void bochs_hw_fini(struct drm_device *dev);
void bochs_hw_setmode(struct bochs_device *bochs,
struct drm_display_mode *mode);
void bochs_hw_setbase(struct bochs_device *bochs,
int x, int y, u64 addr);
/* bochs_mm.c */
int bochs_mm_init(struct bochs_device *bochs);
void bochs_mm_fini(struct bochs_device *bochs);
int bochs_mmap(struct file *filp, struct vm_area_struct *vma);
int bochs_gem_create(struct drm_device *dev, u32 size, bool iskernel,
struct drm_gem_object **obj);
int bochs_gem_init_object(struct drm_gem_object *obj);
void bochs_gem_free_object(struct drm_gem_object *obj);
int bochs_dumb_create(struct drm_file *file, struct drm_device *dev,
struct drm_mode_create_dumb *args);
int bochs_dumb_mmap_offset(struct drm_file *file, struct drm_device *dev,
uint32_t handle, uint64_t *offset);
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 bochs_bo_pin(struct bochs_bo *bo, u32 pl_flag, u64 *gpu_addr);
int bochs_bo_unpin(struct bochs_bo *bo);
extern const struct drm_mode_config_funcs bochs_mode_funcs;
/* bochs_kms.c */
int bochs_kms_init(struct bochs_device *bochs);
void bochs_kms_fini(struct bochs_device *bochs);
/* bochs_fbdev.c */
int bochs_fbdev_init(struct bochs_device *bochs);
void bochs_fbdev_fini(struct bochs_device *bochs);

178
drivers/gpu/drm/bochs/bochs_drv.c Normal file
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@ -0,0 +1,178 @@
/*
* 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 <linux/mm.h>
#include <linux/module.h>
#include <linux/slab.h>
#include "bochs.h"
static bool enable_fbdev = true;
module_param_named(fbdev, enable_fbdev, bool, 0444);
MODULE_PARM_DESC(fbdev, "register fbdev device");
/* ---------------------------------------------------------------------- */
/* drm interface */
static int bochs_unload(struct drm_device *dev)
{
struct bochs_device *bochs = dev->dev_private;
bochs_fbdev_fini(bochs);
bochs_kms_fini(bochs);
bochs_mm_fini(bochs);
bochs_hw_fini(dev);
kfree(bochs);
dev->dev_private = NULL;
return 0;
}
static int bochs_load(struct drm_device *dev, unsigned long flags)
{
struct bochs_device *bochs;
int ret;
bochs = kzalloc(sizeof(*bochs), GFP_KERNEL);
if (bochs == NULL)
return -ENOMEM;
dev->dev_private = bochs;
bochs->dev = dev;
ret = bochs_hw_init(dev, flags);
if (ret)
goto err;
ret = bochs_mm_init(bochs);
if (ret)
goto err;
ret = bochs_kms_init(bochs);
if (ret)
goto err;
if (enable_fbdev)
bochs_fbdev_init(bochs);
return 0;
err:
bochs_unload(dev);
return ret;
}
static const struct file_operations bochs_fops = {
.owner = THIS_MODULE,
.open = drm_open,
.release = drm_release,
.unlocked_ioctl = drm_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = drm_compat_ioctl,
#endif
.poll = drm_poll,
.read = drm_read,
.llseek = no_llseek,
.mmap = bochs_mmap,
};
static struct drm_driver bochs_driver = {
.driver_features = DRIVER_GEM | DRIVER_MODESET,
.load = bochs_load,
.unload = bochs_unload,
.fops = &bochs_fops,
.name = "bochs-drm",
.desc = "bochs dispi vga interface (qemu stdvga)",
.date = "20130925",
.major = 1,
.minor = 0,
.gem_free_object = bochs_gem_free_object,
.dumb_create = bochs_dumb_create,
.dumb_map_offset = bochs_dumb_mmap_offset,
.dumb_destroy = drm_gem_dumb_destroy,
};
/* ---------------------------------------------------------------------- */
/* pci interface */
static int bochs_kick_out_firmware_fb(struct pci_dev *pdev)
{
struct apertures_struct *ap;
ap = alloc_apertures(1);
if (!ap)
return -ENOMEM;
ap->ranges[0].base = pci_resource_start(pdev, 0);
ap->ranges[0].size = pci_resource_len(pdev, 0);
remove_conflicting_framebuffers(ap, "bochsdrmfb", false);
kfree(ap);
return 0;
}
static int bochs_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
int ret;
ret = bochs_kick_out_firmware_fb(pdev);
if (ret)
return ret;
return drm_get_pci_dev(pdev, ent, &bochs_driver);
}
static void bochs_pci_remove(struct pci_dev *pdev)
{
struct drm_device *dev = pci_get_drvdata(pdev);
drm_put_dev(dev);
}
static DEFINE_PCI_DEVICE_TABLE(bochs_pci_tbl) = {
{
.vendor = 0x1234,
.device = 0x1111,
.subvendor = 0x1af4,
.subdevice = 0x1100,
.driver_data = BOCHS_QEMU_STDVGA,
},
{
.vendor = 0x1234,
.device = 0x1111,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
.driver_data = BOCHS_UNKNOWN,
},
{ /* end of list */ }
};
static struct pci_driver bochs_pci_driver = {
.name = "bochs-drm",
.id_table = bochs_pci_tbl,
.probe = bochs_pci_probe,
.remove = bochs_pci_remove,
};
/* ---------------------------------------------------------------------- */
/* module init/exit */
static int __init bochs_init(void)
{
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
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@ -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
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@ -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
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/*
* 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
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/*
* 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,
};