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- /*
- * 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;
- 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;
- 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;
- }
- 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;
- }
- 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(dev, file, handle);
- if (obj == NULL)
- return -ENOENT;
- bo = gem_to_mga_bo(obj);
- *offset = mgag200_bo_mmap_offset(bo);
- drm_gem_object_unreference_unlocked(obj);
- return 0;
- }
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