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
  21         drm_gem_object_put_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                              const 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(dev, &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                                 const 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(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_put_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_put_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         drm_fb_helper_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         if (!mem)
 149                 return -ENOMEM;
 150
 151         mdev->mc.vram_size = mga_probe_vram(mdev, mem);
 152
 153         pci_iounmap(mdev->dev->pdev, mem);
 154
 155         return 0;
 156 }
 157
 158 static int mgag200_device_init(struct drm_device *dev,
 159                                uint32_t flags)
 160 {
 161         struct mga_device *mdev = dev->dev_private;
 162         int ret, option;
 163
 164         mdev->type = flags;
 165
 166         /* Hardcode the number of CRTCs to 1 */
 167         mdev->num_crtc = 1;
 168
 169         pci_read_config_dword(dev->pdev, PCI_MGA_OPTION, &option);
 170         mdev->has_sdram = !(option & (1 << 14));
 171
 172         /* BAR 0 is the framebuffer, BAR 1 contains registers */
 173         mdev->rmmio_base = pci_resource_start(mdev->dev->pdev, 1);
 174         mdev->rmmio_size = pci_resource_len(mdev->dev->pdev, 1);
 175
 176         if (!devm_request_mem_region(mdev->dev->dev, mdev->rmmio_base, mdev->rmmio_size,
 177                                 "mgadrmfb_mmio")) {
 178                 DRM_ERROR("can't reserve mmio registers\n");
 179                 return -ENOMEM;
 180         }
 181
 182         mdev->rmmio = pcim_iomap(dev->pdev, 1, 0);
 183         if (mdev->rmmio == NULL)
 184                 return -ENOMEM;
 185
 186         /* stash G200 SE model number for later use */
 187         if (IS_G200_SE(mdev))
 188                 mdev->unique_rev_id = RREG32(0x1e24);
 189
 190         ret = mga_vram_init(mdev);
 191         if (ret)
 192                 return ret;
 193
 194         mdev->bpp_shifts[0] = 0;
 195         mdev->bpp_shifts[1] = 1;
 196         mdev->bpp_shifts[2] = 0;
 197         mdev->bpp_shifts[3] = 2;
 198         return 0;
 199 }
 200
 201 /*
 202  * Functions here will be called by the core once it's bound the driver to
 203  * a PCI device
 204  */
 205
 206
 207 int mgag200_driver_load(struct drm_device *dev, unsigned long flags)
 208 {
 209         struct mga_device *mdev;
 210         int r;
 211
 212         mdev = devm_kzalloc(dev->dev, sizeof(struct mga_device), GFP_KERNEL);
 213         if (mdev == NULL)
 214                 return -ENOMEM;
 215         dev->dev_private = (void *)mdev;
 216         mdev->dev = dev;
 217
 218         r = mgag200_device_init(dev, flags);
 219         if (r) {
 220                 dev_err(&dev->pdev->dev, "Fatal error during GPU init: %d\n", r);
 221                 return r;
 222         }
 223         r = mgag200_mm_init(mdev);
 224         if (r)
 225                 goto err_mm;
 226
 227         drm_mode_config_init(dev);
 228         dev->mode_config.funcs = (void *)&mga_mode_funcs;
 229         if (IS_G200_SE(mdev) && mdev->mc.vram_size < (2048*1024))
 230                 dev->mode_config.preferred_depth = 16;
 231         else
 232                 dev->mode_config.preferred_depth = 24;
 233         dev->mode_config.prefer_shadow = 1;
 234
 235         r = mgag200_modeset_init(mdev);
 236         if (r) {
 237                 dev_err(&dev->pdev->dev, "Fatal error during modeset init: %d\n", r);
 238                 goto err_modeset;
 239         }
 240
 241         /* Make small buffers to store a hardware cursor (double buffered icon updates) */
 242         mgag200_bo_create(dev, roundup(48*64, PAGE_SIZE), 0, 0,
 243                                           &mdev->cursor.pixels_1);
 244         mgag200_bo_create(dev, roundup(48*64, PAGE_SIZE), 0, 0,
 245                                           &mdev->cursor.pixels_2);
 246         if (!mdev->cursor.pixels_2 || !mdev->cursor.pixels_1) {
 247                 mdev->cursor.pixels_1 = NULL;
 248                 mdev->cursor.pixels_2 = NULL;
 249                 dev_warn(&dev->pdev->dev,
 250                         "Could not allocate space for cursors. Not doing hardware cursors.\n");
 251         } else {
 252                 mdev->cursor.pixels_current = mdev->cursor.pixels_1;
 253                 mdev->cursor.pixels_prev = mdev->cursor.pixels_2;
 254         }
 255
 256         return 0;
 257
 258 err_modeset:
 259         drm_mode_config_cleanup(dev);
 260         mgag200_mm_fini(mdev);
 261 err_mm:
 262         dev->dev_private = NULL;
 263
 264         return r;
 265 }
 266
 267 void mgag200_driver_unload(struct drm_device *dev)
 268 {
 269         struct mga_device *mdev = dev->dev_private;
 270
 271         if (mdev == NULL)
 272                 return;
 273         mgag200_modeset_fini(mdev);
 274         mgag200_fbdev_fini(mdev);
 275         drm_mode_config_cleanup(dev);
 276         mgag200_mm_fini(mdev);
 277         dev->dev_private = NULL;
 278 }
 279
 280 int mgag200_gem_create(struct drm_device *dev,
 281                    u32 size, bool iskernel,
 282                    struct drm_gem_object **obj)
 283 {
 284         struct mgag200_bo *astbo;
 285         int ret;
 286
 287         *obj = NULL;
 288
 289         size = roundup(size, PAGE_SIZE);
 290         if (size == 0)
 291                 return -EINVAL;
 292
 293         ret = mgag200_bo_create(dev, size, 0, 0, &astbo);
 294         if (ret) {
 295                 if (ret != -ERESTARTSYS)
 296                         DRM_ERROR("failed to allocate GEM object\n");
 297                 return ret;
 298         }
 299         *obj = &astbo->gem;
 300         return 0;
 301 }
 302
 303 int mgag200_dumb_create(struct drm_file *file,
 304                     struct drm_device *dev,
 305                     struct drm_mode_create_dumb *args)
 306 {
 307         int ret;
 308         struct drm_gem_object *gobj;
 309         u32 handle;
 310
 311         args->pitch = args->width * ((args->bpp + 7) / 8);
 312         args->size = args->pitch * args->height;
 313
 314         ret = mgag200_gem_create(dev, args->size, false,
 315                              &gobj);
 316         if (ret)
 317                 return ret;
 318
 319         ret = drm_gem_handle_create(file, gobj, &handle);
 320         drm_gem_object_put_unlocked(gobj);
 321         if (ret)
 322                 return ret;
 323
 324         args->handle = handle;
 325         return 0;
 326 }
 327
 328 static void mgag200_bo_unref(struct mgag200_bo **bo)
 329 {
 330         struct ttm_buffer_object *tbo;
 331
 332         if ((*bo) == NULL)
 333                 return;
 334
 335         tbo = &((*bo)->bo);
 336         ttm_bo_unref(&tbo);
 337         *bo = NULL;
 338 }
 339
 340 void mgag200_gem_free_object(struct drm_gem_object *obj)
 341 {
 342         struct mgag200_bo *mgag200_bo = gem_to_mga_bo(obj);
 343
 344         mgag200_bo_unref(&mgag200_bo);
 345 }
 346
 347
 348 static inline u64 mgag200_bo_mmap_offset(struct mgag200_bo *bo)
 349 {
 350         return drm_vma_node_offset_addr(&bo->bo.vma_node);
 351 }
 352
 353 int
 354 mgag200_dumb_mmap_offset(struct drm_file *file,
 355                      struct drm_device *dev,
 356                      uint32_t handle,
 357                      uint64_t *offset)
 358 {
 359         struct drm_gem_object *obj;
 360         struct mgag200_bo *bo;
 361
 362         obj = drm_gem_object_lookup(file, handle);
 363         if (obj == NULL)
 364                 return -ENOENT;
 365
 366         bo = gem_to_mga_bo(obj);
 367         *offset = mgag200_bo_mmap_offset(bo);
 368
 369         drm_gem_object_put_unlocked(obj);
 370         return 0;
 371 }