diff options
Diffstat (limited to 'drivers/gpu/drm/mgag200/mgag200_main.c')
| -rw-r--r-- | drivers/gpu/drm/mgag200/mgag200_main.c | 388 |
1 files changed, 388 insertions, 0 deletions
diff --git a/drivers/gpu/drm/mgag200/mgag200_main.c b/drivers/gpu/drm/mgag200/mgag200_main.c new file mode 100644 index 000000000000..636a81cd2f37 --- /dev/null +++ b/drivers/gpu/drm/mgag200/mgag200_main.c @@ -0,0 +1,388 @@ +/* + * Copyright 2010 Matt Turner. + * Copyright 2012 Red Hat + * + * This file is subject to the terms and conditions of the GNU General + * Public License version 2. See the file COPYING in the main + * directory of this archive for more details. + * + * Authors: Matthew Garrett + * Matt Turner + * Dave Airlie + */ +#include "drmP.h" +#include "drm.h" +#include "drm_crtc_helper.h" +#include "mgag200_drv.h" + +static void mga_user_framebuffer_destroy(struct drm_framebuffer *fb) +{ + struct mga_framebuffer *mga_fb = to_mga_framebuffer(fb); + if (mga_fb->obj) + drm_gem_object_unreference_unlocked(mga_fb->obj); + drm_framebuffer_cleanup(fb); + kfree(fb); +} + +static int mga_user_framebuffer_create_handle(struct drm_framebuffer *fb, + struct drm_file *file_priv, + unsigned int *handle) +{ + return 0; +} + +static const struct drm_framebuffer_funcs mga_fb_funcs = { + .destroy = mga_user_framebuffer_destroy, + .create_handle = mga_user_framebuffer_create_handle, +}; + +int mgag200_framebuffer_init(struct drm_device *dev, + struct mga_framebuffer *gfb, + struct drm_mode_fb_cmd2 *mode_cmd, + struct drm_gem_object *obj) +{ + int ret = drm_framebuffer_init(dev, &gfb->base, &mga_fb_funcs); + if (ret) { + DRM_ERROR("drm_framebuffer_init failed: %d\n", ret); + return ret; + } + drm_helper_mode_fill_fb_struct(&gfb->base, mode_cmd); + gfb->obj = obj; + return 0; +} + +static struct drm_framebuffer * +mgag200_user_framebuffer_create(struct drm_device *dev, + struct drm_file *filp, + struct drm_mode_fb_cmd2 *mode_cmd) +{ + struct drm_gem_object *obj; + struct mga_framebuffer *mga_fb; + int ret; + + obj = drm_gem_object_lookup(dev, filp, mode_cmd->handles[0]); + if (obj == NULL) + return ERR_PTR(-ENOENT); + + mga_fb = kzalloc(sizeof(*mga_fb), GFP_KERNEL); + if (!mga_fb) { + drm_gem_object_unreference_unlocked(obj); + return ERR_PTR(-ENOMEM); + } + + ret = mgag200_framebuffer_init(dev, mga_fb, mode_cmd, obj); + if (ret) { + drm_gem_object_unreference_unlocked(obj); + kfree(mga_fb); + return ERR_PTR(ret); + } + return &mga_fb->base; +} + +static const struct drm_mode_config_funcs mga_mode_funcs = { + .fb_create = mgag200_user_framebuffer_create, +}; + +/* Unmap the framebuffer from the core and release the memory */ +static void mga_vram_fini(struct mga_device *mdev) +{ + pci_iounmap(mdev->dev->pdev, mdev->rmmio); + mdev->rmmio = NULL; + if (mdev->mc.vram_base) + release_mem_region(mdev->mc.vram_base, mdev->mc.vram_window); +} + +static int mga_probe_vram(struct mga_device *mdev, void __iomem *mem) +{ + int offset; + int orig; + int test1, test2; + int orig1, orig2; + + /* Probe */ + orig = ioread16(mem); + iowrite16(0, mem); + + for (offset = 0x100000; offset < mdev->mc.vram_window; offset += 0x4000) { + orig1 = ioread8(mem + offset); + orig2 = ioread8(mem + offset + 0x100); + + iowrite16(0xaa55, mem + offset); + iowrite16(0xaa55, mem + offset + 0x100); + + test1 = ioread16(mem + offset); + test2 = ioread16(mem); + + iowrite16(orig1, mem + offset); + iowrite16(orig2, mem + offset + 0x100); + + if (test1 != 0xaa55) { + break; + } + + if (test2) { + break; + } + } + + iowrite16(orig, mem); + return offset - 65536; +} + +/* Map the framebuffer from the card and configure the core */ +static int mga_vram_init(struct mga_device *mdev) +{ + void __iomem *mem; + struct apertures_struct *aper = alloc_apertures(1); + + /* BAR 0 is VRAM */ + mdev->mc.vram_base = pci_resource_start(mdev->dev->pdev, 0); + mdev->mc.vram_window = pci_resource_len(mdev->dev->pdev, 0); + + aper->ranges[0].base = mdev->mc.vram_base; + aper->ranges[0].size = mdev->mc.vram_window; + aper->count = 1; + + remove_conflicting_framebuffers(aper, "mgafb", true); + + if (!request_mem_region(mdev->mc.vram_base, mdev->mc.vram_window, + "mgadrmfb_vram")) { + DRM_ERROR("can't reserve VRAM\n"); + return -ENXIO; + } + + mem = pci_iomap(mdev->dev->pdev, 0, 0); + + mdev->mc.vram_size = mga_probe_vram(mdev, mem); + + pci_iounmap(mdev->dev->pdev, mem); + + return 0; +} + +static int mgag200_device_init(struct drm_device *dev, + uint32_t flags) +{ + struct mga_device *mdev = dev->dev_private; + int ret, option; + + mdev->type = flags; + + /* Hardcode the number of CRTCs to 1 */ + mdev->num_crtc = 1; + + pci_read_config_dword(dev->pdev, PCI_MGA_OPTION, &option); + mdev->has_sdram = !(option & (1 << 14)); + + /* BAR 0 is the framebuffer, BAR 1 contains registers */ + mdev->rmmio_base = pci_resource_start(mdev->dev->pdev, 1); + mdev->rmmio_size = pci_resource_len(mdev->dev->pdev, 1); + + if (!request_mem_region(mdev->rmmio_base, mdev->rmmio_size, + "mgadrmfb_mmio")) { + DRM_ERROR("can't reserve mmio registers\n"); + return -ENOMEM; + } + + mdev->rmmio = pci_iomap(dev->pdev, 1, 0); + if (mdev->rmmio == NULL) + return -ENOMEM; + + /* stash G200 SE model number for later use */ + if (IS_G200_SE(mdev)) + mdev->reg_1e24 = RREG32(0x1e24); + + ret = mga_vram_init(mdev); + if (ret) { + release_mem_region(mdev->rmmio_base, mdev->rmmio_size); + return ret; + } + + mdev->bpp_shifts[0] = 0; + mdev->bpp_shifts[1] = 1; + mdev->bpp_shifts[2] = 0; + mdev->bpp_shifts[3] = 2; + return 0; +} + +void mgag200_device_fini(struct mga_device *mdev) +{ + release_mem_region(mdev->rmmio_base, mdev->rmmio_size); + mga_vram_fini(mdev); +} + +/* + * Functions here will be called by the core once it's bound the driver to + * a PCI device + */ + + +int mgag200_driver_load(struct drm_device *dev, unsigned long flags) +{ + struct mga_device *mdev; + int r; + + mdev = kzalloc(sizeof(struct mga_device), GFP_KERNEL); + if (mdev == NULL) + return -ENOMEM; + dev->dev_private = (void *)mdev; + mdev->dev = dev; + + r = mgag200_device_init(dev, flags); + if (r) { + dev_err(&dev->pdev->dev, "Fatal error during GPU init: %d\n", r); + goto out; + } + r = mgag200_mm_init(mdev); + if (r) + goto out; + + drm_mode_config_init(dev); + dev->mode_config.funcs = (void *)&mga_mode_funcs; + dev->mode_config.min_width = 0; + dev->mode_config.min_height = 0; + dev->mode_config.preferred_depth = 24; + dev->mode_config.prefer_shadow = 1; + + r = mgag200_modeset_init(mdev); + if (r) + dev_err(&dev->pdev->dev, "Fatal error during modeset init: %d\n", r); +out: + if (r) + mgag200_driver_unload(dev); + return r; +} + +int mgag200_driver_unload(struct drm_device *dev) +{ + struct mga_device *mdev = dev->dev_private; + + if (mdev == NULL) + return 0; + mgag200_modeset_fini(mdev); + mgag200_fbdev_fini(mdev); + drm_mode_config_cleanup(dev); + mgag200_mm_fini(mdev); + mgag200_device_fini(mdev); + kfree(mdev); + dev->dev_private = NULL; + return 0; +} + +int mgag200_gem_create(struct drm_device *dev, + u32 size, bool iskernel, + struct drm_gem_object **obj) +{ + struct mgag200_bo *astbo; + int ret; + + *obj = NULL; + + size = roundup(size, PAGE_SIZE); + if (size == 0) + return -EINVAL; + + ret = mgag200_bo_create(dev, size, 0, 0, &astbo); + if (ret) { + if (ret != -ERESTARTSYS) + DRM_ERROR("failed to allocate GEM object\n"); + return ret; + } + *obj = &astbo->gem; + return 0; +} + +int mgag200_dumb_create(struct drm_file *file, + struct drm_device *dev, + struct drm_mode_create_dumb *args) +{ + int ret; + struct drm_gem_object *gobj; + u32 handle; + + args->pitch = args->width * ((args->bpp + 7) / 8); + args->size = args->pitch * args->height; + + ret = mgag200_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; +} + +int mgag200_dumb_destroy(struct drm_file *file, + struct drm_device *dev, + uint32_t handle) +{ + return drm_gem_handle_delete(file, handle); +} + +int mgag200_gem_init_object(struct drm_gem_object *obj) +{ + BUG(); + return 0; +} + +void mgag200_bo_unref(struct mgag200_bo **bo) +{ + struct ttm_buffer_object *tbo; + + if ((*bo) == NULL) + return; + + tbo = &((*bo)->bo); + ttm_bo_unref(&tbo); + if (tbo == NULL) + *bo = NULL; + +} + +void mgag200_gem_free_object(struct drm_gem_object *obj) +{ + struct mgag200_bo *mgag200_bo = gem_to_mga_bo(obj); + + if (!mgag200_bo) + return; + mgag200_bo_unref(&mgag200_bo); +} + + +static inline u64 mgag200_bo_mmap_offset(struct mgag200_bo *bo) +{ + return bo->bo.addr_space_offset; +} + +int +mgag200_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 mgag200_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_mga_bo(obj); + *offset = mgag200_bo_mmap_offset(bo); + + drm_gem_object_unreference(obj); + ret = 0; +out_unlock: + mutex_unlock(&dev->struct_mutex); + return ret; + +} |