mgag200_main.c 8.3 KB

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  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. static void mga_user_framebuffer_destroy(struct drm_framebuffer *fb)
  17. {
  18. struct mga_framebuffer *mga_fb = to_mga_framebuffer(fb);
  19. if (mga_fb->obj)
  20. drm_gem_object_unreference_unlocked(mga_fb->obj);
  21. drm_framebuffer_cleanup(fb);
  22. kfree(fb);
  23. }
  24. static const struct drm_framebuffer_funcs mga_fb_funcs = {
  25. .destroy = mga_user_framebuffer_destroy,
  26. };
  27. int mgag200_framebuffer_init(struct drm_device *dev,
  28. struct mga_framebuffer *gfb,
  29. struct drm_mode_fb_cmd2 *mode_cmd,
  30. struct drm_gem_object *obj)
  31. {
  32. int ret;
  33. drm_helper_mode_fill_fb_struct(&gfb->base, mode_cmd);
  34. gfb->obj = obj;
  35. ret = drm_framebuffer_init(dev, &gfb->base, &mga_fb_funcs);
  36. if (ret) {
  37. DRM_ERROR("drm_framebuffer_init failed: %d\n", ret);
  38. return ret;
  39. }
  40. return 0;
  41. }
  42. static struct drm_framebuffer *
  43. mgag200_user_framebuffer_create(struct drm_device *dev,
  44. struct drm_file *filp,
  45. struct drm_mode_fb_cmd2 *mode_cmd)
  46. {
  47. struct drm_gem_object *obj;
  48. struct mga_framebuffer *mga_fb;
  49. int ret;
  50. obj = drm_gem_object_lookup(dev, filp, mode_cmd->handles[0]);
  51. if (obj == NULL)
  52. return ERR_PTR(-ENOENT);
  53. mga_fb = kzalloc(sizeof(*mga_fb), GFP_KERNEL);
  54. if (!mga_fb) {
  55. drm_gem_object_unreference_unlocked(obj);
  56. return ERR_PTR(-ENOMEM);
  57. }
  58. ret = mgag200_framebuffer_init(dev, mga_fb, mode_cmd, obj);
  59. if (ret) {
  60. drm_gem_object_unreference_unlocked(obj);
  61. kfree(mga_fb);
  62. return ERR_PTR(ret);
  63. }
  64. return &mga_fb->base;
  65. }
  66. static const struct drm_mode_config_funcs mga_mode_funcs = {
  67. .fb_create = mgag200_user_framebuffer_create,
  68. };
  69. static int mga_probe_vram(struct mga_device *mdev, void __iomem *mem)
  70. {
  71. int offset;
  72. int orig;
  73. int test1, test2;
  74. int orig1, orig2;
  75. /* Probe */
  76. orig = ioread16(mem);
  77. iowrite16(0, mem);
  78. for (offset = 0x100000; offset < mdev->mc.vram_window; offset += 0x4000) {
  79. orig1 = ioread8(mem + offset);
  80. orig2 = ioread8(mem + offset + 0x100);
  81. iowrite16(0xaa55, mem + offset);
  82. iowrite16(0xaa55, mem + offset + 0x100);
  83. test1 = ioread16(mem + offset);
  84. test2 = ioread16(mem);
  85. iowrite16(orig1, mem + offset);
  86. iowrite16(orig2, mem + offset + 0x100);
  87. if (test1 != 0xaa55) {
  88. break;
  89. }
  90. if (test2) {
  91. break;
  92. }
  93. }
  94. iowrite16(orig, mem);
  95. return offset - 65536;
  96. }
  97. /* Map the framebuffer from the card and configure the core */
  98. static int mga_vram_init(struct mga_device *mdev)
  99. {
  100. void __iomem *mem;
  101. struct apertures_struct *aper = alloc_apertures(1);
  102. if (!aper)
  103. return -ENOMEM;
  104. /* BAR 0 is VRAM */
  105. mdev->mc.vram_base = pci_resource_start(mdev->dev->pdev, 0);
  106. mdev->mc.vram_window = pci_resource_len(mdev->dev->pdev, 0);
  107. aper->ranges[0].base = mdev->mc.vram_base;
  108. aper->ranges[0].size = mdev->mc.vram_window;
  109. remove_conflicting_framebuffers(aper, "mgafb", true);
  110. kfree(aper);
  111. if (!devm_request_mem_region(mdev->dev->dev, mdev->mc.vram_base, mdev->mc.vram_window,
  112. "mgadrmfb_vram")) {
  113. DRM_ERROR("can't reserve VRAM\n");
  114. return -ENXIO;
  115. }
  116. mem = pci_iomap(mdev->dev->pdev, 0, 0);
  117. mdev->mc.vram_size = mga_probe_vram(mdev, mem);
  118. pci_iounmap(mdev->dev->pdev, mem);
  119. return 0;
  120. }
  121. static int mgag200_device_init(struct drm_device *dev,
  122. uint32_t flags)
  123. {
  124. struct mga_device *mdev = dev->dev_private;
  125. int ret, option;
  126. mdev->type = flags;
  127. /* Hardcode the number of CRTCs to 1 */
  128. mdev->num_crtc = 1;
  129. pci_read_config_dword(dev->pdev, PCI_MGA_OPTION, &option);
  130. mdev->has_sdram = !(option & (1 << 14));
  131. /* BAR 0 is the framebuffer, BAR 1 contains registers */
  132. mdev->rmmio_base = pci_resource_start(mdev->dev->pdev, 1);
  133. mdev->rmmio_size = pci_resource_len(mdev->dev->pdev, 1);
  134. if (!devm_request_mem_region(mdev->dev->dev, mdev->rmmio_base, mdev->rmmio_size,
  135. "mgadrmfb_mmio")) {
  136. DRM_ERROR("can't reserve mmio registers\n");
  137. return -ENOMEM;
  138. }
  139. mdev->rmmio = pcim_iomap(dev->pdev, 1, 0);
  140. if (mdev->rmmio == NULL)
  141. return -ENOMEM;
  142. /* stash G200 SE model number for later use */
  143. if (IS_G200_SE(mdev))
  144. mdev->unique_rev_id = RREG32(0x1e24);
  145. ret = mga_vram_init(mdev);
  146. if (ret)
  147. return ret;
  148. mdev->bpp_shifts[0] = 0;
  149. mdev->bpp_shifts[1] = 1;
  150. mdev->bpp_shifts[2] = 0;
  151. mdev->bpp_shifts[3] = 2;
  152. return 0;
  153. }
  154. /*
  155. * Functions here will be called by the core once it's bound the driver to
  156. * a PCI device
  157. */
  158. int mgag200_driver_load(struct drm_device *dev, unsigned long flags)
  159. {
  160. struct mga_device *mdev;
  161. int r;
  162. mdev = devm_kzalloc(dev->dev, sizeof(struct mga_device), GFP_KERNEL);
  163. if (mdev == NULL)
  164. return -ENOMEM;
  165. dev->dev_private = (void *)mdev;
  166. mdev->dev = dev;
  167. r = mgag200_device_init(dev, flags);
  168. if (r) {
  169. dev_err(&dev->pdev->dev, "Fatal error during GPU init: %d\n", r);
  170. return r;
  171. }
  172. r = mgag200_mm_init(mdev);
  173. if (r)
  174. goto out;
  175. drm_mode_config_init(dev);
  176. dev->mode_config.funcs = (void *)&mga_mode_funcs;
  177. dev->mode_config.preferred_depth = 24;
  178. dev->mode_config.prefer_shadow = 1;
  179. r = mgag200_modeset_init(mdev);
  180. if (r) {
  181. dev_err(&dev->pdev->dev, "Fatal error during modeset init: %d\n", r);
  182. goto out;
  183. }
  184. /* Make small buffers to store a hardware cursor (double buffered icon updates) */
  185. mgag200_bo_create(dev, roundup(48*64, PAGE_SIZE), 0, 0,
  186. &mdev->cursor.pixels_1);
  187. mgag200_bo_create(dev, roundup(48*64, PAGE_SIZE), 0, 0,
  188. &mdev->cursor.pixels_2);
  189. if (!mdev->cursor.pixels_2 || !mdev->cursor.pixels_1)
  190. goto cursor_nospace;
  191. mdev->cursor.pixels_current = mdev->cursor.pixels_1;
  192. mdev->cursor.pixels_prev = mdev->cursor.pixels_2;
  193. goto cursor_done;
  194. cursor_nospace:
  195. mdev->cursor.pixels_1 = NULL;
  196. mdev->cursor.pixels_2 = NULL;
  197. dev_warn(&dev->pdev->dev, "Could not allocate space for cursors. Not doing hardware cursors.\n");
  198. cursor_done:
  199. out:
  200. if (r)
  201. mgag200_driver_unload(dev);
  202. return r;
  203. }
  204. int mgag200_driver_unload(struct drm_device *dev)
  205. {
  206. struct mga_device *mdev = dev->dev_private;
  207. if (mdev == NULL)
  208. return 0;
  209. mgag200_modeset_fini(mdev);
  210. mgag200_fbdev_fini(mdev);
  211. drm_mode_config_cleanup(dev);
  212. mgag200_mm_fini(mdev);
  213. dev->dev_private = NULL;
  214. return 0;
  215. }
  216. int mgag200_gem_create(struct drm_device *dev,
  217. u32 size, bool iskernel,
  218. struct drm_gem_object **obj)
  219. {
  220. struct mgag200_bo *astbo;
  221. int ret;
  222. *obj = NULL;
  223. size = roundup(size, PAGE_SIZE);
  224. if (size == 0)
  225. return -EINVAL;
  226. ret = mgag200_bo_create(dev, size, 0, 0, &astbo);
  227. if (ret) {
  228. if (ret != -ERESTARTSYS)
  229. DRM_ERROR("failed to allocate GEM object\n");
  230. return ret;
  231. }
  232. *obj = &astbo->gem;
  233. return 0;
  234. }
  235. int mgag200_dumb_create(struct drm_file *file,
  236. struct drm_device *dev,
  237. struct drm_mode_create_dumb *args)
  238. {
  239. int ret;
  240. struct drm_gem_object *gobj;
  241. u32 handle;
  242. args->pitch = args->width * ((args->bpp + 7) / 8);
  243. args->size = args->pitch * args->height;
  244. ret = mgag200_gem_create(dev, args->size, false,
  245. &gobj);
  246. if (ret)
  247. return ret;
  248. ret = drm_gem_handle_create(file, gobj, &handle);
  249. drm_gem_object_unreference_unlocked(gobj);
  250. if (ret)
  251. return ret;
  252. args->handle = handle;
  253. return 0;
  254. }
  255. int mgag200_dumb_destroy(struct drm_file *file,
  256. struct drm_device *dev,
  257. uint32_t handle)
  258. {
  259. return drm_gem_handle_delete(file, handle);
  260. }
  261. int mgag200_gem_init_object(struct drm_gem_object *obj)
  262. {
  263. BUG();
  264. return 0;
  265. }
  266. void mgag200_bo_unref(struct mgag200_bo **bo)
  267. {
  268. struct ttm_buffer_object *tbo;
  269. if ((*bo) == NULL)
  270. return;
  271. tbo = &((*bo)->bo);
  272. ttm_bo_unref(&tbo);
  273. if (tbo == NULL)
  274. *bo = NULL;
  275. }
  276. void mgag200_gem_free_object(struct drm_gem_object *obj)
  277. {
  278. struct mgag200_bo *mgag200_bo = gem_to_mga_bo(obj);
  279. if (!mgag200_bo)
  280. return;
  281. mgag200_bo_unref(&mgag200_bo);
  282. }
  283. static inline u64 mgag200_bo_mmap_offset(struct mgag200_bo *bo)
  284. {
  285. return bo->bo.addr_space_offset;
  286. }
  287. int
  288. mgag200_dumb_mmap_offset(struct drm_file *file,
  289. struct drm_device *dev,
  290. uint32_t handle,
  291. uint64_t *offset)
  292. {
  293. struct drm_gem_object *obj;
  294. int ret;
  295. struct mgag200_bo *bo;
  296. mutex_lock(&dev->struct_mutex);
  297. obj = drm_gem_object_lookup(dev, file, handle);
  298. if (obj == NULL) {
  299. ret = -ENOENT;
  300. goto out_unlock;
  301. }
  302. bo = gem_to_mga_bo(obj);
  303. *offset = mgag200_bo_mmap_offset(bo);
  304. drm_gem_object_unreference(obj);
  305. ret = 0;
  306. out_unlock:
  307. mutex_unlock(&dev->struct_mutex);
  308. return ret;
  309. }