2 * Copyright 2012 Red Hat
4 * This file is subject to the terms and conditions of the GNU General
5 * Public License version 2. See the file COPYING in the main
6 * directory of this archive for more details.
8 * Authors: Matthew Garrett
12 #include <drm/drm_crtc_helper.h>
14 #include "cirrus_drv.h"
17 static void cirrus_user_framebuffer_destroy(struct drm_framebuffer *fb)
19 struct cirrus_framebuffer *cirrus_fb = to_cirrus_framebuffer(fb);
21 drm_gem_object_unreference_unlocked(cirrus_fb->obj);
22 drm_framebuffer_cleanup(fb);
26 static const struct drm_framebuffer_funcs cirrus_fb_funcs = {
27 .destroy = cirrus_user_framebuffer_destroy,
30 int cirrus_framebuffer_init(struct drm_device *dev,
31 struct cirrus_framebuffer *gfb,
32 struct drm_mode_fb_cmd2 *mode_cmd,
33 struct drm_gem_object *obj)
37 drm_helper_mode_fill_fb_struct(&gfb->base, mode_cmd);
39 ret = drm_framebuffer_init(dev, &gfb->base, &cirrus_fb_funcs);
41 DRM_ERROR("drm_framebuffer_init failed: %d\n", ret);
47 static struct drm_framebuffer *
48 cirrus_user_framebuffer_create(struct drm_device *dev,
49 struct drm_file *filp,
50 struct drm_mode_fb_cmd2 *mode_cmd)
52 struct drm_gem_object *obj;
53 struct cirrus_framebuffer *cirrus_fb;
57 drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp);
58 /* cirrus can't handle > 24bpp framebuffers at all */
60 return ERR_PTR(-EINVAL);
62 obj = drm_gem_object_lookup(dev, filp, mode_cmd->handles[0]);
64 return ERR_PTR(-ENOENT);
66 cirrus_fb = kzalloc(sizeof(*cirrus_fb), GFP_KERNEL);
68 drm_gem_object_unreference_unlocked(obj);
69 return ERR_PTR(-ENOMEM);
72 ret = cirrus_framebuffer_init(dev, cirrus_fb, mode_cmd, obj);
74 drm_gem_object_unreference_unlocked(obj);
78 return &cirrus_fb->base;
81 static const struct drm_mode_config_funcs cirrus_mode_funcs = {
82 .fb_create = cirrus_user_framebuffer_create,
85 /* Unmap the framebuffer from the core and release the memory */
86 static void cirrus_vram_fini(struct cirrus_device *cdev)
90 if (cdev->mc.vram_base)
91 release_mem_region(cdev->mc.vram_base, cdev->mc.vram_size);
94 /* Map the framebuffer from the card and configure the core */
95 static int cirrus_vram_init(struct cirrus_device *cdev)
98 cdev->mc.vram_base = pci_resource_start(cdev->dev->pdev, 0);
99 /* We have 4MB of VRAM */
100 cdev->mc.vram_size = 4 * 1024 * 1024;
102 if (!request_mem_region(cdev->mc.vram_base, cdev->mc.vram_size,
103 "cirrusdrmfb_vram")) {
104 DRM_ERROR("can't reserve VRAM\n");
112 * Our emulated hardware has two sets of memory. One is video RAM and can
113 * simply be used as a linear framebuffer - the other provides mmio access
114 * to the display registers. The latter can also be accessed via IO port
115 * access, but we map the range and use mmio to program them instead
118 int cirrus_device_init(struct cirrus_device *cdev,
119 struct drm_device *ddev,
120 struct pci_dev *pdev, uint32_t flags)
127 /* Hardcode the number of CRTCs to 1 */
130 /* BAR 0 is the framebuffer, BAR 1 contains registers */
131 cdev->rmmio_base = pci_resource_start(cdev->dev->pdev, 1);
132 cdev->rmmio_size = pci_resource_len(cdev->dev->pdev, 1);
134 if (!request_mem_region(cdev->rmmio_base, cdev->rmmio_size,
135 "cirrusdrmfb_mmio")) {
136 DRM_ERROR("can't reserve mmio registers\n");
140 cdev->rmmio = ioremap(cdev->rmmio_base, cdev->rmmio_size);
142 if (cdev->rmmio == NULL)
145 ret = cirrus_vram_init(cdev);
147 release_mem_region(cdev->rmmio_base, cdev->rmmio_size);
154 void cirrus_device_fini(struct cirrus_device *cdev)
156 release_mem_region(cdev->rmmio_base, cdev->rmmio_size);
157 cirrus_vram_fini(cdev);
161 * Functions here will be called by the core once it's bound the driver to
165 int cirrus_driver_load(struct drm_device *dev, unsigned long flags)
167 struct cirrus_device *cdev;
170 cdev = kzalloc(sizeof(struct cirrus_device), GFP_KERNEL);
173 dev->dev_private = (void *)cdev;
175 r = cirrus_device_init(cdev, dev, dev->pdev, flags);
177 dev_err(&dev->pdev->dev, "Fatal error during GPU init: %d\n", r);
181 r = cirrus_mm_init(cdev);
183 dev_err(&dev->pdev->dev, "fatal err on mm init\n");
185 r = cirrus_modeset_init(cdev);
187 dev_err(&dev->pdev->dev, "Fatal error during modeset init: %d\n", r);
189 dev->mode_config.funcs = (void *)&cirrus_mode_funcs;
192 cirrus_driver_unload(dev);
196 int cirrus_driver_unload(struct drm_device *dev)
198 struct cirrus_device *cdev = dev->dev_private;
202 cirrus_modeset_fini(cdev);
203 cirrus_mm_fini(cdev);
204 cirrus_device_fini(cdev);
206 dev->dev_private = NULL;
210 int cirrus_gem_create(struct drm_device *dev,
211 u32 size, bool iskernel,
212 struct drm_gem_object **obj)
214 struct cirrus_bo *cirrusbo;
219 size = roundup(size, PAGE_SIZE);
223 ret = cirrus_bo_create(dev, size, 0, 0, &cirrusbo);
225 if (ret != -ERESTARTSYS)
226 DRM_ERROR("failed to allocate GEM object\n");
229 *obj = &cirrusbo->gem;
233 int cirrus_dumb_create(struct drm_file *file,
234 struct drm_device *dev,
235 struct drm_mode_create_dumb *args)
238 struct drm_gem_object *gobj;
241 args->pitch = args->width * ((args->bpp + 7) / 8);
242 args->size = args->pitch * args->height;
244 ret = cirrus_gem_create(dev, args->size, false,
249 ret = drm_gem_handle_create(file, gobj, &handle);
250 drm_gem_object_unreference_unlocked(gobj);
254 args->handle = handle;
258 static void cirrus_bo_unref(struct cirrus_bo **bo)
260 struct ttm_buffer_object *tbo;
272 void cirrus_gem_free_object(struct drm_gem_object *obj)
274 struct cirrus_bo *cirrus_bo = gem_to_cirrus_bo(obj);
278 cirrus_bo_unref(&cirrus_bo);
282 static inline u64 cirrus_bo_mmap_offset(struct cirrus_bo *bo)
284 return drm_vma_node_offset_addr(&bo->bo.vma_node);
288 cirrus_dumb_mmap_offset(struct drm_file *file,
289 struct drm_device *dev,
293 struct drm_gem_object *obj;
295 struct cirrus_bo *bo;
297 mutex_lock(&dev->struct_mutex);
298 obj = drm_gem_object_lookup(dev, file, handle);
304 bo = gem_to_cirrus_bo(obj);
305 *offset = cirrus_bo_mmap_offset(bo);
307 drm_gem_object_unreference(obj);
310 mutex_unlock(&dev->struct_mutex);