drm/bochs: new driver
authorGerd Hoffmann <kraxel@redhat.com>
Tue, 17 Dec 2013 17:04:46 +0000 (18:04 +0100)
committerDave Airlie <airlied@redhat.com>
Mon, 23 Dec 2013 01:02:39 +0000 (11:02 +1000)
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>
drivers/gpu/drm/Kconfig
drivers/gpu/drm/Makefile
drivers/gpu/drm/bochs/Kconfig [new file with mode: 0644]
drivers/gpu/drm/bochs/Makefile [new file with mode: 0644]
drivers/gpu/drm/bochs/bochs.h [new file with mode: 0644]
drivers/gpu/drm/bochs/bochs_drv.c [new file with mode: 0644]
drivers/gpu/drm/bochs/bochs_fbdev.c [new file with mode: 0644]
drivers/gpu/drm/bochs/bochs_hw.c [new file with mode: 0644]
drivers/gpu/drm/bochs/bochs_kms.c [new file with mode: 0644]
drivers/gpu/drm/bochs/bochs_mm.c [new file with mode: 0644]

index 5b1cb7e73ee8c1f1be33a949e8d82be2320685de..8e7fa4dbaed867ca45cb9c885db53543a65a74b9 100644 (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"
index d1a5c7277678c7e39db151497b0a734403a09b2e..292a79d64146274428ad1ef251d08e1d78d46bf5 100644 (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-$(CONFIG_DRM_TEGRA) += tegra/
 obj-y                  += i2c/
diff --git a/drivers/gpu/drm/bochs/Kconfig b/drivers/gpu/drm/bochs/Kconfig
new file mode 100644 (file)
index 0000000..c8fcf12
--- /dev/null
@@ -0,0 +1,11 @@
+config DRM_BOCHS
+       tristate "DRM Support for bochs dispi vga interface (qemu stdvga)"
+       depends on DRM && PCI
+       select DRM_KMS_HELPER
+       select FB_SYS_FILLRECT
+       select FB_SYS_COPYAREA
+       select FB_SYS_IMAGEBLIT
+       select DRM_TTM
+       help
+         Choose this option for qemu.
+         If M is selected the module will be called bochs-drm.
diff --git a/drivers/gpu/drm/bochs/Makefile b/drivers/gpu/drm/bochs/Makefile
new file mode 100644 (file)
index 0000000..844a556
--- /dev/null
@@ -0,0 +1,4 @@
+ccflags-y := -Iinclude/drm
+bochs-drm-y := bochs_drv.o bochs_mm.o bochs_kms.o bochs_fbdev.o bochs_hw.o
+
+obj-$(CONFIG_DRM_BOCHS)        += bochs-drm.o
diff --git a/drivers/gpu/drm/bochs/bochs.h b/drivers/gpu/drm/bochs/bochs.h
new file mode 100644 (file)
index 0000000..741965c
--- /dev/null
@@ -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);
diff --git a/drivers/gpu/drm/bochs/bochs_drv.c b/drivers/gpu/drm/bochs/bochs_drv.c
new file mode 100644 (file)
index 0000000..395bba2
--- /dev/null
@@ -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");
diff --git a/drivers/gpu/drm/bochs/bochs_fbdev.c b/drivers/gpu/drm/bochs/bochs_fbdev.c
new file mode 100644 (file)
index 0000000..4da5206
--- /dev/null
@@ -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;
+}
diff --git a/drivers/gpu/drm/bochs/bochs_hw.c b/drivers/gpu/drm/bochs/bochs_hw.c
new file mode 100644 (file)
index 0000000..dbe619e
--- /dev/null
@@ -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);
+}
diff --git a/drivers/gpu/drm/bochs/bochs_kms.c b/drivers/gpu/drm/bochs/bochs_kms.c
new file mode 100644 (file)
index 0000000..62ec7d4
--- /dev/null
@@ -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;
+       }
+}
diff --git a/drivers/gpu/drm/bochs/bochs_mm.c b/drivers/gpu/drm/bochs/bochs_mm.c
new file mode 100644 (file)
index 0000000..ce68587
--- /dev/null
@@ -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,
+};