| /* |
| * 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 <drm/drmP.h> |
| #include <drm/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 const struct drm_framebuffer_funcs mga_fb_funcs = { |
| .destroy = mga_user_framebuffer_destroy, |
| }; |
| |
| 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_helper_mode_fill_fb_struct(&gfb->base, mode_cmd); |
| gfb->obj = obj; |
| ret = drm_framebuffer_init(dev, &gfb->base, &mga_fb_funcs); |
| if (ret) { |
| DRM_ERROR("drm_framebuffer_init failed: %d\n", ret); |
| return ret; |
| } |
| 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, |
| }; |
| |
| 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); |
| if (!aper) |
| return -ENOMEM; |
| |
| /* 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; |
| |
| remove_conflicting_framebuffers(aper, "mgafb", true); |
| kfree(aper); |
| |
| if (!devm_request_mem_region(mdev->dev->dev, 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 (!devm_request_mem_region(mdev->dev->dev, mdev->rmmio_base, mdev->rmmio_size, |
| "mgadrmfb_mmio")) { |
| DRM_ERROR("can't reserve mmio registers\n"); |
| return -ENOMEM; |
| } |
| |
| mdev->rmmio = pcim_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) |
| return ret; |
| |
| mdev->bpp_shifts[0] = 0; |
| mdev->bpp_shifts[1] = 1; |
| mdev->bpp_shifts[2] = 0; |
| mdev->bpp_shifts[3] = 2; |
| return 0; |
| } |
| |
| /* |
| * 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 = devm_kzalloc(dev->dev, 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); |
| return r; |
| } |
| 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.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); |
| goto out; |
| } |
| |
| /* Make small buffers to store a hardware cursor (double buffered icon updates) */ |
| mgag200_bo_create(dev, roundup(48*64, PAGE_SIZE), 0, 0, |
| &mdev->cursor.pixels_1); |
| mgag200_bo_create(dev, roundup(48*64, PAGE_SIZE), 0, 0, |
| &mdev->cursor.pixels_2); |
| if (!mdev->cursor.pixels_2 || !mdev->cursor.pixels_1) |
| goto cursor_nospace; |
| mdev->cursor.pixels_current = mdev->cursor.pixels_1; |
| mdev->cursor.pixels_prev = mdev->cursor.pixels_2; |
| goto cursor_done; |
| cursor_nospace: |
| mdev->cursor.pixels_1 = NULL; |
| mdev->cursor.pixels_2 = NULL; |
| dev_warn(&dev->pdev->dev, "Could not allocate space for cursors. Not doing hardware cursors.\n"); |
| cursor_done: |
| |
| 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); |
| 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; |
| |
| } |