[PATCH] drm/bochs: new driver
Gerd Hoffmann
kraxel at redhat.com
Thu Dec 12 06:24:05 PST 2013
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 at redhat.com>
---
drivers/gpu/drm/Kconfig | 2 +
drivers/gpu/drm/Makefile | 1 +
drivers/gpu/drm/bochs/Kconfig | 11 +
drivers/gpu/drm/bochs/Makefile | 4 +
drivers/gpu/drm/bochs/bochs.h | 164 +++++++++++
drivers/gpu/drm/bochs/bochs_drv.c | 178 ++++++++++++
drivers/gpu/drm/bochs/bochs_fbdev.c | 215 ++++++++++++++
drivers/gpu/drm/bochs/bochs_hw.c | 177 ++++++++++++
drivers/gpu/drm/bochs/bochs_kms.c | 294 +++++++++++++++++++
drivers/gpu/drm/bochs/bochs_mm.c | 546 ++++++++++++++++++++++++++++++++++++
10 files changed, 1592 insertions(+)
create mode 100644 drivers/gpu/drm/bochs/Kconfig
create mode 100644 drivers/gpu/drm/bochs/Makefile
create mode 100644 drivers/gpu/drm/bochs/bochs.h
create mode 100644 drivers/gpu/drm/bochs/bochs_drv.c
create mode 100644 drivers/gpu/drm/bochs/bochs_fbdev.c
create mode 100644 drivers/gpu/drm/bochs/bochs_hw.c
create mode 100644 drivers/gpu/drm/bochs/bochs_kms.c
create mode 100644 drivers/gpu/drm/bochs/bochs_mm.c
diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
index f864275..5f6e715 100644
--- a/drivers/gpu/drm/Kconfig
+++ b/drivers/gpu/drm/Kconfig
@@ -188,6 +188,8 @@ 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"
diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
index cc08b84..e6997e4 100644
--- a/drivers/gpu/drm/Makefile
+++ b/drivers/gpu/drm/Makefile
@@ -56,6 +56,7 @@ 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-$(CONFIG_DRM_TEGRA) += tegra/
obj-y += i2c/
diff --git a/drivers/gpu/drm/bochs/Kconfig b/drivers/gpu/drm/bochs/Kconfig
new file mode 100644
index 0000000..c8fcf12
--- /dev/null
+++ b/drivers/gpu/drm/bochs/Kconfig
@@ -0,0 +1,11 @@
+config DRM_BOCHS
+ tristate "DRM Support for bochs dispi vga interface (qemu stdvga)"
+ depends on DRM && PCI
+ select DRM_KMS_HELPER
+ select FB_SYS_FILLRECT
+ select FB_SYS_COPYAREA
+ select FB_SYS_IMAGEBLIT
+ select DRM_TTM
+ help
+ Choose this option for qemu.
+ If M is selected the module will be called bochs-drm.
diff --git a/drivers/gpu/drm/bochs/Makefile b/drivers/gpu/drm/bochs/Makefile
new file mode 100644
index 0000000..844a556
--- /dev/null
+++ b/drivers/gpu/drm/bochs/Makefile
@@ -0,0 +1,4 @@
+ccflags-y := -Iinclude/drm
+bochs-drm-y := bochs_drv.o bochs_mm.o bochs_kms.o bochs_fbdev.o bochs_hw.o
+
+obj-$(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
index 0000000..741965c
--- /dev/null
+++ b/drivers/gpu/drm/bochs/bochs.h
@@ -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
index 0000000..395bba2
--- /dev/null
+++ b/drivers/gpu/drm/bochs/bochs_drv.c
@@ -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 at 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
index 0000000..4da5206
--- /dev/null
+++ b/drivers/gpu/drm/bochs/bochs_fbdev.c
@@ -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
index 0000000..f7e7971
--- /dev/null
+++ b/drivers/gpu/drm/bochs/bochs_hw.c
@@ -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)
+{
+ u64 offset = 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 %llx, 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
index 0000000..62ec7d4
--- /dev/null
+++ b/drivers/gpu/drm/bochs/bochs_kms.c
@@ -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
index 0000000..afe104f
--- /dev/null
+++ b/drivers/gpu/drm/bochs/bochs_mm.c
@@ -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 = roundup(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,
+};
--
1.8.3.1
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