diff options
Diffstat (limited to 'drivers/gpu/drm/mgag200/mgag200_main.c')
| -rw-r--r-- | drivers/gpu/drm/mgag200/mgag200_main.c | 371 |
1 files changed, 371 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 000000000..780f983b0 --- /dev/null +++ b/drivers/gpu/drm/mgag200/mgag200_main.c @@ -0,0 +1,371 @@ +/* + * 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); + + drm_gem_object_put_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, + const struct drm_mode_fb_cmd2 *mode_cmd, + struct drm_gem_object *obj) +{ + int ret; + + drm_helper_mode_fill_fb_struct(dev, &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, + const struct drm_mode_fb_cmd2 *mode_cmd) +{ + struct drm_gem_object *obj; + struct mga_framebuffer *mga_fb; + int ret; + + obj = drm_gem_object_lookup(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_put_unlocked(obj); + return ERR_PTR(-ENOMEM); + } + + ret = mgag200_framebuffer_init(dev, mga_fb, mode_cmd, obj); + if (ret) { + drm_gem_object_put_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; + unsigned int vram_size; + + /* Probe */ + orig = ioread16(mem); + iowrite16(0, mem); + + vram_size = mdev->mc.vram_window; + + if ((mdev->type == G200_EW3) && (vram_size >= 0x1000000)) { + vram_size = vram_size - 0x400000; + } + + for (offset = 0x100000; offset < vram_size; 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; + + drm_fb_helper_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); + if (!mem) + return -ENOMEM; + + 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->unique_rev_id = 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 err_mm; + + drm_mode_config_init(dev); + dev->mode_config.funcs = (void *)&mga_mode_funcs; + if (IS_G200_SE(mdev) && mdev->mc.vram_size < (2048*1024)) + dev->mode_config.preferred_depth = 16; + else + 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 err_modeset; + } + + /* 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) { + 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"); + } else { + mdev->cursor.pixels_current = mdev->cursor.pixels_1; + mdev->cursor.pixels_prev = mdev->cursor.pixels_2; + } + + return 0; + +err_modeset: + drm_mode_config_cleanup(dev); + mgag200_mm_fini(mdev); +err_mm: + dev->dev_private = NULL; + + return r; +} + +void mgag200_driver_unload(struct drm_device *dev) +{ + struct mga_device *mdev = dev->dev_private; + + if (mdev == NULL) + return; + mgag200_modeset_fini(mdev); + mgag200_fbdev_fini(mdev); + drm_mode_config_cleanup(dev); + mgag200_mm_fini(mdev); + dev->dev_private = NULL; +} + +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_put_unlocked(gobj); + if (ret) + return ret; + + args->handle = handle; + return 0; +} + +static void mgag200_bo_unref(struct mgag200_bo **bo) +{ + struct ttm_buffer_object *tbo; + + if ((*bo) == NULL) + return; + + tbo = &((*bo)->bo); + ttm_bo_unref(&tbo); + *bo = NULL; +} + +void mgag200_gem_free_object(struct drm_gem_object *obj) +{ + struct mgag200_bo *mgag200_bo = gem_to_mga_bo(obj); + + mgag200_bo_unref(&mgag200_bo); +} + + +static inline u64 mgag200_bo_mmap_offset(struct mgag200_bo *bo) +{ + return drm_vma_node_offset_addr(&bo->bo.vma_node); +} + +int +mgag200_dumb_mmap_offset(struct drm_file *file, + struct drm_device *dev, + uint32_t handle, + uint64_t *offset) +{ + struct drm_gem_object *obj; + struct mgag200_bo *bo; + + obj = drm_gem_object_lookup(file, handle); + if (obj == NULL) + return -ENOENT; + + bo = gem_to_mga_bo(obj); + *offset = mgag200_bo_mmap_offset(bo); + + drm_gem_object_put_unlocked(obj); + return 0; +} |