Dave Airlie | f9aa76a | 2012-04-17 14:12:29 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2012 Red Hat |
| 3 | * |
| 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. |
| 7 | * |
| 8 | * Authors: Matthew Garrett |
| 9 | * Dave Airlie |
| 10 | */ |
David Howells | 760285e | 2012-10-02 18:01:07 +0100 | [diff] [blame] | 11 | #include <drm/drmP.h> |
| 12 | #include <drm/drm_crtc_helper.h> |
Dave Airlie | f9aa76a | 2012-04-17 14:12:29 +0100 | [diff] [blame] | 13 | |
| 14 | #include "cirrus_drv.h" |
| 15 | |
| 16 | |
| 17 | static void cirrus_user_framebuffer_destroy(struct drm_framebuffer *fb) |
| 18 | { |
| 19 | struct cirrus_framebuffer *cirrus_fb = to_cirrus_framebuffer(fb); |
| 20 | if (cirrus_fb->obj) |
| 21 | drm_gem_object_unreference_unlocked(cirrus_fb->obj); |
| 22 | drm_framebuffer_cleanup(fb); |
| 23 | kfree(fb); |
| 24 | } |
| 25 | |
Dave Airlie | f9aa76a | 2012-04-17 14:12:29 +0100 | [diff] [blame] | 26 | static const struct drm_framebuffer_funcs cirrus_fb_funcs = { |
| 27 | .destroy = cirrus_user_framebuffer_destroy, |
Dave Airlie | f9aa76a | 2012-04-17 14:12:29 +0100 | [diff] [blame] | 28 | }; |
| 29 | |
| 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) |
| 34 | { |
| 35 | int ret; |
| 36 | |
Daniel Vetter | c7d73f6 | 2012-12-13 23:38:38 +0100 | [diff] [blame] | 37 | drm_helper_mode_fill_fb_struct(&gfb->base, mode_cmd); |
| 38 | gfb->obj = obj; |
Dave Airlie | f9aa76a | 2012-04-17 14:12:29 +0100 | [diff] [blame] | 39 | ret = drm_framebuffer_init(dev, &gfb->base, &cirrus_fb_funcs); |
| 40 | if (ret) { |
| 41 | DRM_ERROR("drm_framebuffer_init failed: %d\n", ret); |
| 42 | return ret; |
| 43 | } |
Dave Airlie | f9aa76a | 2012-04-17 14:12:29 +0100 | [diff] [blame] | 44 | return 0; |
| 45 | } |
| 46 | |
| 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) |
| 51 | { |
| 52 | struct drm_gem_object *obj; |
| 53 | struct cirrus_framebuffer *cirrus_fb; |
| 54 | int ret; |
| 55 | u32 bpp, depth; |
| 56 | |
| 57 | drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp); |
| 58 | /* cirrus can't handle > 24bpp framebuffers at all */ |
| 59 | if (bpp > 24) |
| 60 | return ERR_PTR(-EINVAL); |
| 61 | |
| 62 | obj = drm_gem_object_lookup(dev, filp, mode_cmd->handles[0]); |
| 63 | if (obj == NULL) |
| 64 | return ERR_PTR(-ENOENT); |
| 65 | |
| 66 | cirrus_fb = kzalloc(sizeof(*cirrus_fb), GFP_KERNEL); |
| 67 | if (!cirrus_fb) { |
| 68 | drm_gem_object_unreference_unlocked(obj); |
| 69 | return ERR_PTR(-ENOMEM); |
| 70 | } |
| 71 | |
| 72 | ret = cirrus_framebuffer_init(dev, cirrus_fb, mode_cmd, obj); |
| 73 | if (ret) { |
| 74 | drm_gem_object_unreference_unlocked(obj); |
| 75 | kfree(cirrus_fb); |
| 76 | return ERR_PTR(ret); |
| 77 | } |
| 78 | return &cirrus_fb->base; |
| 79 | } |
| 80 | |
| 81 | static const struct drm_mode_config_funcs cirrus_mode_funcs = { |
| 82 | .fb_create = cirrus_user_framebuffer_create, |
| 83 | }; |
| 84 | |
| 85 | /* Unmap the framebuffer from the core and release the memory */ |
| 86 | static void cirrus_vram_fini(struct cirrus_device *cdev) |
| 87 | { |
| 88 | iounmap(cdev->rmmio); |
| 89 | cdev->rmmio = NULL; |
| 90 | if (cdev->mc.vram_base) |
| 91 | release_mem_region(cdev->mc.vram_base, cdev->mc.vram_size); |
| 92 | } |
| 93 | |
| 94 | /* Map the framebuffer from the card and configure the core */ |
| 95 | static int cirrus_vram_init(struct cirrus_device *cdev) |
| 96 | { |
| 97 | /* BAR 0 is VRAM */ |
| 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; |
| 101 | |
| 102 | if (!request_mem_region(cdev->mc.vram_base, cdev->mc.vram_size, |
| 103 | "cirrusdrmfb_vram")) { |
| 104 | DRM_ERROR("can't reserve VRAM\n"); |
| 105 | return -ENXIO; |
| 106 | } |
| 107 | |
| 108 | return 0; |
| 109 | } |
| 110 | |
| 111 | /* |
| 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 |
| 116 | */ |
| 117 | |
| 118 | int cirrus_device_init(struct cirrus_device *cdev, |
| 119 | struct drm_device *ddev, |
| 120 | struct pci_dev *pdev, uint32_t flags) |
| 121 | { |
| 122 | int ret; |
| 123 | |
| 124 | cdev->dev = ddev; |
| 125 | cdev->flags = flags; |
| 126 | |
| 127 | /* Hardcode the number of CRTCs to 1 */ |
| 128 | cdev->num_crtc = 1; |
| 129 | |
| 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); |
| 133 | |
| 134 | if (!request_mem_region(cdev->rmmio_base, cdev->rmmio_size, |
| 135 | "cirrusdrmfb_mmio")) { |
| 136 | DRM_ERROR("can't reserve mmio registers\n"); |
| 137 | return -ENOMEM; |
| 138 | } |
| 139 | |
| 140 | cdev->rmmio = ioremap(cdev->rmmio_base, cdev->rmmio_size); |
| 141 | |
| 142 | if (cdev->rmmio == NULL) |
| 143 | return -ENOMEM; |
| 144 | |
| 145 | ret = cirrus_vram_init(cdev); |
| 146 | if (ret) { |
| 147 | release_mem_region(cdev->rmmio_base, cdev->rmmio_size); |
| 148 | return ret; |
| 149 | } |
| 150 | |
| 151 | return 0; |
| 152 | } |
| 153 | |
| 154 | void cirrus_device_fini(struct cirrus_device *cdev) |
| 155 | { |
| 156 | release_mem_region(cdev->rmmio_base, cdev->rmmio_size); |
| 157 | cirrus_vram_fini(cdev); |
| 158 | } |
| 159 | |
| 160 | /* |
| 161 | * Functions here will be called by the core once it's bound the driver to |
| 162 | * a PCI device |
| 163 | */ |
| 164 | |
| 165 | int cirrus_driver_load(struct drm_device *dev, unsigned long flags) |
| 166 | { |
| 167 | struct cirrus_device *cdev; |
| 168 | int r; |
| 169 | |
| 170 | cdev = kzalloc(sizeof(struct cirrus_device), GFP_KERNEL); |
| 171 | if (cdev == NULL) |
| 172 | return -ENOMEM; |
| 173 | dev->dev_private = (void *)cdev; |
| 174 | |
| 175 | r = cirrus_device_init(cdev, dev, dev->pdev, flags); |
| 176 | if (r) { |
| 177 | dev_err(&dev->pdev->dev, "Fatal error during GPU init: %d\n", r); |
| 178 | goto out; |
| 179 | } |
| 180 | |
| 181 | r = cirrus_mm_init(cdev); |
| 182 | if (r) |
| 183 | dev_err(&dev->pdev->dev, "fatal err on mm init\n"); |
| 184 | |
| 185 | r = cirrus_modeset_init(cdev); |
| 186 | if (r) |
| 187 | dev_err(&dev->pdev->dev, "Fatal error during modeset init: %d\n", r); |
| 188 | |
| 189 | dev->mode_config.funcs = (void *)&cirrus_mode_funcs; |
| 190 | out: |
| 191 | if (r) |
| 192 | cirrus_driver_unload(dev); |
| 193 | return r; |
| 194 | } |
| 195 | |
| 196 | int cirrus_driver_unload(struct drm_device *dev) |
| 197 | { |
| 198 | struct cirrus_device *cdev = dev->dev_private; |
| 199 | |
| 200 | if (cdev == NULL) |
| 201 | return 0; |
| 202 | cirrus_modeset_fini(cdev); |
| 203 | cirrus_mm_fini(cdev); |
| 204 | cirrus_device_fini(cdev); |
| 205 | kfree(cdev); |
| 206 | dev->dev_private = NULL; |
| 207 | return 0; |
| 208 | } |
| 209 | |
| 210 | int cirrus_gem_create(struct drm_device *dev, |
| 211 | u32 size, bool iskernel, |
| 212 | struct drm_gem_object **obj) |
| 213 | { |
| 214 | struct cirrus_bo *cirrusbo; |
| 215 | int ret; |
| 216 | |
| 217 | *obj = NULL; |
| 218 | |
| 219 | size = roundup(size, PAGE_SIZE); |
| 220 | if (size == 0) |
| 221 | return -EINVAL; |
| 222 | |
| 223 | ret = cirrus_bo_create(dev, size, 0, 0, &cirrusbo); |
| 224 | if (ret) { |
| 225 | if (ret != -ERESTARTSYS) |
| 226 | DRM_ERROR("failed to allocate GEM object\n"); |
| 227 | return ret; |
| 228 | } |
| 229 | *obj = &cirrusbo->gem; |
| 230 | return 0; |
| 231 | } |
| 232 | |
| 233 | int cirrus_dumb_create(struct drm_file *file, |
| 234 | struct drm_device *dev, |
| 235 | struct drm_mode_create_dumb *args) |
| 236 | { |
| 237 | int ret; |
| 238 | struct drm_gem_object *gobj; |
| 239 | u32 handle; |
| 240 | |
| 241 | args->pitch = args->width * ((args->bpp + 7) / 8); |
| 242 | args->size = args->pitch * args->height; |
| 243 | |
| 244 | ret = cirrus_gem_create(dev, args->size, false, |
| 245 | &gobj); |
| 246 | if (ret) |
| 247 | return ret; |
| 248 | |
| 249 | ret = drm_gem_handle_create(file, gobj, &handle); |
| 250 | drm_gem_object_unreference_unlocked(gobj); |
| 251 | if (ret) |
| 252 | return ret; |
| 253 | |
| 254 | args->handle = handle; |
| 255 | return 0; |
| 256 | } |
| 257 | |
Rashika | 70d5422 | 2014-01-06 20:29:12 +0530 | [diff] [blame] | 258 | static void cirrus_bo_unref(struct cirrus_bo **bo) |
Dave Airlie | f9aa76a | 2012-04-17 14:12:29 +0100 | [diff] [blame] | 259 | { |
| 260 | struct ttm_buffer_object *tbo; |
| 261 | |
| 262 | if ((*bo) == NULL) |
| 263 | return; |
| 264 | |
| 265 | tbo = &((*bo)->bo); |
| 266 | ttm_bo_unref(&tbo); |
Daniel Vetter | 275c632 | 2014-04-05 10:09:36 +0200 | [diff] [blame] | 267 | *bo = NULL; |
Dave Airlie | f9aa76a | 2012-04-17 14:12:29 +0100 | [diff] [blame] | 268 | } |
| 269 | |
| 270 | void cirrus_gem_free_object(struct drm_gem_object *obj) |
| 271 | { |
| 272 | struct cirrus_bo *cirrus_bo = gem_to_cirrus_bo(obj); |
| 273 | |
Dave Airlie | f9aa76a | 2012-04-17 14:12:29 +0100 | [diff] [blame] | 274 | cirrus_bo_unref(&cirrus_bo); |
| 275 | } |
| 276 | |
| 277 | |
| 278 | static inline u64 cirrus_bo_mmap_offset(struct cirrus_bo *bo) |
| 279 | { |
David Herrmann | 72525b3 | 2013-07-24 21:08:53 +0200 | [diff] [blame] | 280 | return drm_vma_node_offset_addr(&bo->bo.vma_node); |
Dave Airlie | f9aa76a | 2012-04-17 14:12:29 +0100 | [diff] [blame] | 281 | } |
| 282 | |
| 283 | int |
| 284 | cirrus_dumb_mmap_offset(struct drm_file *file, |
| 285 | struct drm_device *dev, |
| 286 | uint32_t handle, |
| 287 | uint64_t *offset) |
| 288 | { |
| 289 | struct drm_gem_object *obj; |
| 290 | int ret; |
| 291 | struct cirrus_bo *bo; |
| 292 | |
| 293 | mutex_lock(&dev->struct_mutex); |
| 294 | obj = drm_gem_object_lookup(dev, file, handle); |
| 295 | if (obj == NULL) { |
| 296 | ret = -ENOENT; |
| 297 | goto out_unlock; |
| 298 | } |
| 299 | |
| 300 | bo = gem_to_cirrus_bo(obj); |
| 301 | *offset = cirrus_bo_mmap_offset(bo); |
| 302 | |
| 303 | drm_gem_object_unreference(obj); |
| 304 | ret = 0; |
| 305 | out_unlock: |
| 306 | mutex_unlock(&dev->struct_mutex); |
| 307 | return ret; |
| 308 | |
| 309 | } |