--- /dev/null
+/*
+ * 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
+ * Dave Airlie
+ */
+#include <drm/drmP.h>
+#include <drm/drm_crtc_helper.h>
+
+#include "cirrus_drv.h"
+
+
+static void cirrus_user_framebuffer_destroy(struct drm_framebuffer *fb)
+{
+ struct cirrus_framebuffer *cirrus_fb = to_cirrus_framebuffer(fb);
+ if (cirrus_fb->obj)
+ drm_gem_object_unreference_unlocked(cirrus_fb->obj);
+ drm_framebuffer_cleanup(fb);
+ kfree(fb);
+}
+
+static const struct drm_framebuffer_funcs cirrus_fb_funcs = {
+ .destroy = cirrus_user_framebuffer_destroy,
+};
+
+int cirrus_framebuffer_init(struct drm_device *dev,
+ struct cirrus_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, &cirrus_fb_funcs);
+ if (ret) {
+ DRM_ERROR("drm_framebuffer_init failed: %d\n", ret);
+ return ret;
+ }
+ return 0;
+}
+
+static struct drm_framebuffer *
+cirrus_user_framebuffer_create(struct drm_device *dev,
+ struct drm_file *filp,
+ struct drm_mode_fb_cmd2 *mode_cmd)
+{
+ struct cirrus_device *cdev = dev->dev_private;
+ struct drm_gem_object *obj;
+ struct cirrus_framebuffer *cirrus_fb;
+ int ret;
+ u32 bpp, depth;
+
+ drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp);
+
+ if (!cirrus_check_framebuffer(cdev, mode_cmd->width, mode_cmd->height,
+ bpp, mode_cmd->pitches[0]))
+ return ERR_PTR(-EINVAL);
+
+ obj = drm_gem_object_lookup(dev, filp, mode_cmd->handles[0]);
+ if (obj == NULL)
+ return ERR_PTR(-ENOENT);
+
+ cirrus_fb = kzalloc(sizeof(*cirrus_fb), GFP_KERNEL);
+ if (!cirrus_fb) {
+ drm_gem_object_unreference_unlocked(obj);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ ret = cirrus_framebuffer_init(dev, cirrus_fb, mode_cmd, obj);
+ if (ret) {
+ drm_gem_object_unreference_unlocked(obj);
+ kfree(cirrus_fb);
+ return ERR_PTR(ret);
+ }
+ return &cirrus_fb->base;
+}
+
+static const struct drm_mode_config_funcs cirrus_mode_funcs = {
+ .fb_create = cirrus_user_framebuffer_create,
+};
+
+/* Unmap the framebuffer from the core and release the memory */
+static void cirrus_vram_fini(struct cirrus_device *cdev)
+{
+ iounmap(cdev->rmmio);
+ cdev->rmmio = NULL;
+ if (cdev->mc.vram_base)
+ release_mem_region(cdev->mc.vram_base, cdev->mc.vram_size);
+}
+
+/* Map the framebuffer from the card and configure the core */
+static int cirrus_vram_init(struct cirrus_device *cdev)
+{
+ /* BAR 0 is VRAM */
+ cdev->mc.vram_base = pci_resource_start(cdev->dev->pdev, 0);
+ cdev->mc.vram_size = pci_resource_len(cdev->dev->pdev, 0);
+
+ if (!request_mem_region(cdev->mc.vram_base, cdev->mc.vram_size,
+ "cirrusdrmfb_vram")) {
+ DRM_ERROR("can't reserve VRAM\n");
+ return -ENXIO;
+ }
+
+ return 0;
+}
+
+/*
+ * Our emulated hardware has two sets of memory. One is video RAM and can
+ * simply be used as a linear framebuffer - the other provides mmio access
+ * to the display registers. The latter can also be accessed via IO port
+ * access, but we map the range and use mmio to program them instead
+ */
+
+int cirrus_device_init(struct cirrus_device *cdev,
+ struct drm_device *ddev,
+ struct pci_dev *pdev, uint32_t flags)
+{
+ int ret;
+
+ cdev->dev = ddev;
+ cdev->flags = flags;
+
+ /* Hardcode the number of CRTCs to 1 */
+ cdev->num_crtc = 1;
+
+ /* BAR 0 is the framebuffer, BAR 1 contains registers */
+ cdev->rmmio_base = pci_resource_start(cdev->dev->pdev, 1);
+ cdev->rmmio_size = pci_resource_len(cdev->dev->pdev, 1);
+
+ if (!request_mem_region(cdev->rmmio_base, cdev->rmmio_size,
+ "cirrusdrmfb_mmio")) {
+ DRM_ERROR("can't reserve mmio registers\n");
+ return -ENOMEM;
+ }
+
+ cdev->rmmio = ioremap(cdev->rmmio_base, cdev->rmmio_size);
+
+ if (cdev->rmmio == NULL)
+ return -ENOMEM;
+
+ ret = cirrus_vram_init(cdev);
+ if (ret) {
+ release_mem_region(cdev->rmmio_base, cdev->rmmio_size);
+ return ret;
+ }
+
+ return 0;
+}
+
+void cirrus_device_fini(struct cirrus_device *cdev)
+{
+ release_mem_region(cdev->rmmio_base, cdev->rmmio_size);
+ cirrus_vram_fini(cdev);
+}
+
+/*
+ * Functions here will be called by the core once it's bound the driver to
+ * a PCI device
+ */
+
+int cirrus_driver_load(struct drm_device *dev, unsigned long flags)
+{
+ struct cirrus_device *cdev;
+ int r;
+
+ cdev = kzalloc(sizeof(struct cirrus_device), GFP_KERNEL);
+ if (cdev == NULL)
+ return -ENOMEM;
+ dev->dev_private = (void *)cdev;
+
+ r = cirrus_device_init(cdev, dev, dev->pdev, flags);
+ if (r) {
+ dev_err(&dev->pdev->dev, "Fatal error during GPU init: %d\n", r);
+ goto out;
+ }
+
+ r = cirrus_mm_init(cdev);
+ if (r) {
+ dev_err(&dev->pdev->dev, "fatal err on mm init\n");
+ goto out;
+ }
+
+ r = cirrus_modeset_init(cdev);
+ if (r) {
+ dev_err(&dev->pdev->dev, "Fatal error during modeset init: %d\n", r);
+ goto out;
+ }
+
+ dev->mode_config.funcs = (void *)&cirrus_mode_funcs;
+
+ return 0;
+out:
+ cirrus_driver_unload(dev);
+ return r;
+}
+
+int cirrus_driver_unload(struct drm_device *dev)
+{
+ struct cirrus_device *cdev = dev->dev_private;
+
+ if (cdev == NULL)
+ return 0;
+ cirrus_modeset_fini(cdev);
+ cirrus_mm_fini(cdev);
+ cirrus_device_fini(cdev);
+ kfree(cdev);
+ dev->dev_private = NULL;
+ return 0;
+}
+
+int cirrus_gem_create(struct drm_device *dev,
+ u32 size, bool iskernel,
+ struct drm_gem_object **obj)
+{
+ struct cirrus_bo *cirrusbo;
+ int ret;
+
+ *obj = NULL;
+
+ size = roundup(size, PAGE_SIZE);
+ if (size == 0)
+ return -EINVAL;
+
+ ret = cirrus_bo_create(dev, size, 0, 0, &cirrusbo);
+ if (ret) {
+ if (ret != -ERESTARTSYS)
+ DRM_ERROR("failed to allocate GEM object\n");
+ return ret;
+ }
+ *obj = &cirrusbo->gem;
+ return 0;
+}
+
+int cirrus_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 = cirrus_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 cirrus_bo_unref(struct cirrus_bo **bo)
+{
+ struct ttm_buffer_object *tbo;
+
+ if ((*bo) == NULL)
+ return;
+
+ tbo = &((*bo)->bo);
+ ttm_bo_unref(&tbo);
+ *bo = NULL;
+}
+
+void cirrus_gem_free_object(struct drm_gem_object *obj)
+{
+ struct cirrus_bo *cirrus_bo = gem_to_cirrus_bo(obj);
+
+ cirrus_bo_unref(&cirrus_bo);
+}
+
+
+static inline u64 cirrus_bo_mmap_offset(struct cirrus_bo *bo)
+{
+ return drm_vma_node_offset_addr(&bo->bo.vma_node);
+}
+
+int
+cirrus_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 cirrus_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_cirrus_bo(obj);
+ *offset = cirrus_bo_mmap_offset(bo);
+
+ drm_gem_object_unreference(obj);
+ ret = 0;
+out_unlock:
+ mutex_unlock(&dev->struct_mutex);
+ return ret;
+
+}
+
+bool cirrus_check_framebuffer(struct cirrus_device *cdev, int width, int height,
+ int bpp, int pitch)
+{
+ const int max_pitch = 0x1FF << 3; /* (4096 - 1) & ~111b bytes */
+ const int max_size = cdev->mc.vram_size;
+
+ if (bpp > cirrus_bpp)
+ return false;
+ if (bpp > 32)
+ return false;
+
+ if (pitch > max_pitch)
+ return false;
+
+ if (pitch * height > max_size)
+ return false;
+
+ return true;
+}
Code Review / kvmfornfv.git / blobdiff