--- /dev/null
+/*
+ * 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->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 out;
+
+ 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 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;
+}
+
+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;
+ 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;
+
+}
Code Review / kvmfornfv.git / blobdiff