drivers/gpu/drm/mgag200/mgag200_main.c

   1 /*
   2  * Copyright 2010 Matt Turner.
   3  * Copyright 2012 Red Hat
   4  *
   5  * This file is subject to the terms and conditions of the GNU General
   6  * Public License version 2. See the file COPYING in the main
   7  * directory of this archive for more details.
   8  *
   9  * Authors: Matthew Garrett
  10  *          Matt Turner
  11  *          Dave Airlie
  12  */
  13 #include <drm/drmP.h>
  14 #include <drm/drm_crtc_helper.h>
  15 #include "mgag200_drv.h"
  16
  17 static void mga_user_framebuffer_destroy(struct drm_framebuffer *fb)
  18 {
  19         struct mga_framebuffer *mga_fb = to_mga_framebuffer(fb);
  20         if (mga_fb->obj)
  21                 drm_gem_object_unreference_unlocked(mga_fb->obj);
  22         drm_framebuffer_cleanup(fb);
  23         kfree(fb);
  24 }
  25
  26 static const struct drm_framebuffer_funcs mga_fb_funcs = {
  27         .destroy = mga_user_framebuffer_destroy,
  28 };
  29
  30 int mgag200_framebuffer_init(struct drm_device *dev,
  31                              struct mga_framebuffer *gfb,
  32                              struct drm_mode_fb_cmd2 *mode_cmd,
  33                              struct drm_gem_object *obj)
  34 {
  35         int ret;
  36
  37         drm_helper_mode_fill_fb_struct(&gfb->base, mode_cmd);
  38         gfb->obj = obj;
  39         ret = drm_framebuffer_init(dev, &gfb->base, &mga_fb_funcs);
  40         if (ret) {
  41                 DRM_ERROR("drm_framebuffer_init failed: %d\n", ret);
  42                 return ret;
  43         }
  44         return 0;
  45 }
  46
  47 static struct drm_framebuffer *
  48 mgag200_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 mga_framebuffer *mga_fb;
  54         int ret;
  55
  56         obj = drm_gem_object_lookup(dev, filp, mode_cmd->handles[0]);
  57         if (obj == NULL)
  58                 return ERR_PTR(-ENOENT);
  59
  60         mga_fb = kzalloc(sizeof(*mga_fb), GFP_KERNEL);
  61         if (!mga_fb) {
  62                 drm_gem_object_unreference_unlocked(obj);
  63                 return ERR_PTR(-ENOMEM);
  64         }
  65
  66         ret = mgag200_framebuffer_init(dev, mga_fb, mode_cmd, obj);
  67         if (ret) {
  68                 drm_gem_object_unreference_unlocked(obj);
  69                 kfree(mga_fb);
  70                 return ERR_PTR(ret);
  71         }
  72         return &mga_fb->base;
  73 }
  74
  75 static const struct drm_mode_config_funcs mga_mode_funcs = {
  76         .fb_create = mgag200_user_framebuffer_create,
  77 };
  78
  79 static int mga_probe_vram(struct mga_device *mdev, void __iomem *mem)
  80 {
  81         int offset;
  82         int orig;
  83         int test1, test2;
  84         int orig1, orig2;
  85         unsigned int vram_size;
  86
  87         /* Probe */
  88         orig = ioread16(mem);
  89         iowrite16(0, mem);
  90
  91         vram_size = mdev->mc.vram_window;
  92
  93         if ((mdev->type == G200_EW3) && (vram_size >= 0x1000000)) {
  94                 vram_size = vram_size - 0x400000;
  95         }
  96
  97         for (offset = 0x100000; offset < vram_size; offset += 0x4000) {
  98                 orig1 = ioread8(mem + offset);
  99                 orig2 = ioread8(mem + offset + 0x100);
 100
 101                 iowrite16(0xaa55, mem + offset);
 102                 iowrite16(0xaa55, mem + offset + 0x100);
 103
 104                 test1 = ioread16(mem + offset);
 105                 test2 = ioread16(mem);
 106
 107                 iowrite16(orig1, mem + offset);
 108                 iowrite16(orig2, mem + offset + 0x100);
 109
 110                 if (test1 != 0xaa55) {
 111                         break;
 112                 }
 113
 114                 if (test2) {
 115                         break;
 116                 }
 117         }
 118
 119         iowrite16(orig, mem);
 120         return offset - 65536;
 121 }
 122
 123 /* Map the framebuffer from the card and configure the core */
 124 static int mga_vram_init(struct mga_device *mdev)
 125 {
 126         void __iomem *mem;
 127         struct apertures_struct *aper = alloc_apertures(1);
 128         if (!aper)
 129                 return -ENOMEM;
 130
 131         /* BAR 0 is VRAM */
 132         mdev->mc.vram_base = pci_resource_start(mdev->dev->pdev, 0);
 133         mdev->mc.vram_window = pci_resource_len(mdev->dev->pdev, 0);
 134
 135         aper->ranges[0].base = mdev->mc.vram_base;
 136         aper->ranges[0].size = mdev->mc.vram_window;
 137
 138         remove_conflicting_framebuffers(aper, "mgafb", true);
 139         kfree(aper);
 140
 141         if (!devm_request_mem_region(mdev->dev->dev, mdev->mc.vram_base, mdev->mc.vram_window,
 142                                 "mgadrmfb_vram")) {
 143                 DRM_ERROR("can't reserve VRAM\n");
 144                 return -ENXIO;
 145         }
 146
 147         mem = pci_iomap(mdev->dev->pdev, 0, 0);
 148
 149         mdev->mc.vram_size = mga_probe_vram(mdev, mem);
 150
 151         pci_iounmap(mdev->dev->pdev, mem);
 152
 153         return 0;
 154 }
 155
 156 static int mgag200_device_init(struct drm_device *dev,
 157                                uint32_t flags)
 158 {
 159         struct mga_device *mdev = dev->dev_private;
 160         int ret, option;
 161
 162         mdev->type = flags;
 163
 164         /* Hardcode the number of CRTCs to 1 */
 165         mdev->num_crtc = 1;
 166
 167         pci_read_config_dword(dev->pdev, PCI_MGA_OPTION, &option);
 168         mdev->has_sdram = !(option & (1 << 14));
 169
 170         /* BAR 0 is the framebuffer, BAR 1 contains registers */
 171         mdev->rmmio_base = pci_resource_start(mdev->dev->pdev, 1);
 172         mdev->rmmio_size = pci_resource_len(mdev->dev->pdev, 1);
 173
 174         if (!devm_request_mem_region(mdev->dev->dev, mdev->rmmio_base, mdev->rmmio_size,
 175                                 "mgadrmfb_mmio")) {
 176                 DRM_ERROR("can't reserve mmio registers\n");
 177                 return -ENOMEM;
 178         }
 179
 180         mdev->rmmio = pcim_iomap(dev->pdev, 1, 0);
 181         if (mdev->rmmio == NULL)
 182                 return -ENOMEM;
 183
 184         /* stash G200 SE model number for later use */
 185         if (IS_G200_SE(mdev))
 186                 mdev->unique_rev_id = RREG32(0x1e24);
 187
 188         ret = mga_vram_init(mdev);
 189         if (ret)
 190                 return ret;
 191
 192         mdev->bpp_shifts[0] = 0;
 193         mdev->bpp_shifts[1] = 1;
 194         mdev->bpp_shifts[2] = 0;
 195         mdev->bpp_shifts[3] = 2;
 196         return 0;
 197 }
 198
 199 /*
 200  * Functions here will be called by the core once it's bound the driver to
 201  * a PCI device
 202  */
 203
 204
 205 int mgag200_driver_load(struct drm_device *dev, unsigned long flags)
 206 {
 207         struct mga_device *mdev;
 208         int r;
 209
 210         mdev = devm_kzalloc(dev->dev, sizeof(struct mga_device), GFP_KERNEL);
 211         if (mdev == NULL)
 212                 return -ENOMEM;
 213         dev->dev_private = (void *)mdev;
 214         mdev->dev = dev;
 215
 216         r = mgag200_device_init(dev, flags);
 217         if (r) {
 218                 dev_err(&dev->pdev->dev, "Fatal error during GPU init: %d\n", r);
 219                 return r;
 220         }
 221         r = mgag200_mm_init(mdev);
 222         if (r)
 223                 goto err_mm;
 224
 225         drm_mode_config_init(dev);
 226         dev->mode_config.funcs = (void *)&mga_mode_funcs;
 227         if (IS_G200_SE(mdev) && mdev->mc.vram_size < (2048*1024))
 228                 dev->mode_config.preferred_depth = 16;
 229         else
 230                 dev->mode_config.preferred_depth = 24;
 231         dev->mode_config.prefer_shadow = 1;
 232
 233         r = mgag200_modeset_init(mdev);
 234         if (r) {
 235                 dev_err(&dev->pdev->dev, "Fatal error during modeset init: %d\n", r);
 236                 goto err_modeset;
 237         }
 238
 239         /* Make small buffers to store a hardware cursor (double buffered icon updates) */
 240         mgag200_bo_create(dev, roundup(48*64, PAGE_SIZE), 0, 0,
 241                                           &mdev->cursor.pixels_1);
 242         mgag200_bo_create(dev, roundup(48*64, PAGE_SIZE), 0, 0,
 243                                           &mdev->cursor.pixels_2);
 244         if (!mdev->cursor.pixels_2 || !mdev->cursor.pixels_1) {
 245                 mdev->cursor.pixels_1 = NULL;
 246                 mdev->cursor.pixels_2 = NULL;
 247                 dev_warn(&dev->pdev->dev,
 248                         "Could not allocate space for cursors. Not doing hardware cursors.\n");
 249         } else {
 250                 mdev->cursor.pixels_current = mdev->cursor.pixels_1;
 251                 mdev->cursor.pixels_prev = mdev->cursor.pixels_2;
 252         }
 253
 254         return 0;
 255
 256 err_modeset:
 257         drm_mode_config_cleanup(dev);
 258         mgag200_mm_fini(mdev);
 259 err_mm:
 260         dev->dev_private = NULL;
 261
 262         return r;
 263 }
 264
 265 int mgag200_driver_unload(struct drm_device *dev)
 266 {
 267         struct mga_device *mdev = dev->dev_private;
 268
 269         if (mdev == NULL)
 270                 return 0;
 271         mgag200_modeset_fini(mdev);
 272         mgag200_fbdev_fini(mdev);
 273         drm_mode_config_cleanup(dev);
 274         mgag200_mm_fini(mdev);
 275         dev->dev_private = NULL;
 276         return 0;
 277 }
 278
 279 int mgag200_gem_create(struct drm_device *dev,
 280                    u32 size, bool iskernel,
 281                    struct drm_gem_object **obj)
 282 {
 283         struct mgag200_bo *astbo;
 284         int ret;
 285
 286         *obj = NULL;
 287
 288         size = roundup(size, PAGE_SIZE);
 289         if (size == 0)
 290                 return -EINVAL;
 291
 292         ret = mgag200_bo_create(dev, size, 0, 0, &astbo);
 293         if (ret) {
 294                 if (ret != -ERESTARTSYS)
 295                         DRM_ERROR("failed to allocate GEM object\n");
 296                 return ret;
 297         }
 298         *obj = &astbo->gem;
 299         return 0;
 300 }
 301
 302 int mgag200_dumb_create(struct drm_file *file,
 303                     struct drm_device *dev,
 304                     struct drm_mode_create_dumb *args)
 305 {
 306         int ret;
 307         struct drm_gem_object *gobj;
 308         u32 handle;
 309
 310         args->pitch = args->width * ((args->bpp + 7) / 8);
 311         args->size = args->pitch * args->height;
 312
 313         ret = mgag200_gem_create(dev, args->size, false,
 314                              &gobj);
 315         if (ret)
 316                 return ret;
 317
 318         ret = drm_gem_handle_create(file, gobj, &handle);
 319         drm_gem_object_unreference_unlocked(gobj);
 320         if (ret)
 321                 return ret;
 322
 323         args->handle = handle;
 324         return 0;
 325 }
 326
 327 static void mgag200_bo_unref(struct mgag200_bo **bo)
 328 {
 329         struct ttm_buffer_object *tbo;
 330
 331         if ((*bo) == NULL)
 332                 return;
 333
 334         tbo = &((*bo)->bo);
 335         ttm_bo_unref(&tbo);
 336         *bo = NULL;
 337 }
 338
 339 void mgag200_gem_free_object(struct drm_gem_object *obj)
 340 {
 341         struct mgag200_bo *mgag200_bo = gem_to_mga_bo(obj);
 342
 343         mgag200_bo_unref(&mgag200_bo);
 344 }
 345
 346
 347 static inline u64 mgag200_bo_mmap_offset(struct mgag200_bo *bo)
 348 {
 349         return drm_vma_node_offset_addr(&bo->bo.vma_node);
 350 }
 351
 352 int
 353 mgag200_dumb_mmap_offset(struct drm_file *file,
 354                      struct drm_device *dev,
 355                      uint32_t handle,
 356                      uint64_t *offset)
 357 {
 358         struct drm_gem_object *obj;
 359         struct mgag200_bo *bo;
 360
 361         obj = drm_gem_object_lookup(dev, file, handle);
 362         if (obj == NULL)
 363                 return -ENOENT;
 364
 365         bo = gem_to_mga_bo(obj);
 366         *offset = mgag200_bo_mmap_offset(bo);
 367
 368         drm_gem_object_unreference_unlocked(obj);
 369         return 0;
 370 }