1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright 2010 Matt Turner.
4 * Copyright 2012 Red Hat
6 * Authors: Matthew Garrett
11 #include <drm/drm_crtc_helper.h>
12 #include "mgag200_drv.h"
14 static void mga_user_framebuffer_destroy(struct drm_framebuffer *fb)
16 struct mga_framebuffer *mga_fb = to_mga_framebuffer(fb);
18 drm_gem_object_put_unlocked(mga_fb->obj);
19 drm_framebuffer_cleanup(fb);
23 static const struct drm_framebuffer_funcs mga_fb_funcs = {
24 .destroy = mga_user_framebuffer_destroy,
27 int mgag200_framebuffer_init(struct drm_device *dev,
28 struct mga_framebuffer *gfb,
29 const struct drm_mode_fb_cmd2 *mode_cmd,
30 struct drm_gem_object *obj)
34 drm_helper_mode_fill_fb_struct(dev, &gfb->base, mode_cmd);
36 ret = drm_framebuffer_init(dev, &gfb->base, &mga_fb_funcs);
38 DRM_ERROR("drm_framebuffer_init failed: %d\n", ret);
44 static struct drm_framebuffer *
45 mgag200_user_framebuffer_create(struct drm_device *dev,
46 struct drm_file *filp,
47 const struct drm_mode_fb_cmd2 *mode_cmd)
49 struct drm_gem_object *obj;
50 struct mga_framebuffer *mga_fb;
53 obj = drm_gem_object_lookup(filp, mode_cmd->handles[0]);
55 return ERR_PTR(-ENOENT);
57 mga_fb = kzalloc(sizeof(*mga_fb), GFP_KERNEL);
59 drm_gem_object_put_unlocked(obj);
60 return ERR_PTR(-ENOMEM);
63 ret = mgag200_framebuffer_init(dev, mga_fb, mode_cmd, obj);
65 drm_gem_object_put_unlocked(obj);
72 static const struct drm_mode_config_funcs mga_mode_funcs = {
73 .fb_create = mgag200_user_framebuffer_create,
76 static int mga_probe_vram(struct mga_device *mdev, void __iomem *mem)
82 unsigned int vram_size;
88 vram_size = mdev->mc.vram_window;
90 if ((mdev->type == G200_EW3) && (vram_size >= 0x1000000)) {
91 vram_size = vram_size - 0x400000;
94 for (offset = 0x100000; offset < vram_size; offset += 0x4000) {
95 orig1 = ioread8(mem + offset);
96 orig2 = ioread8(mem + offset + 0x100);
98 iowrite16(0xaa55, mem + offset);
99 iowrite16(0xaa55, mem + offset + 0x100);
101 test1 = ioread16(mem + offset);
102 test2 = ioread16(mem);
104 iowrite16(orig1, mem + offset);
105 iowrite16(orig2, mem + offset + 0x100);
107 if (test1 != 0xaa55) {
116 iowrite16(orig, mem);
117 return offset - 65536;
120 /* Map the framebuffer from the card and configure the core */
121 static int mga_vram_init(struct mga_device *mdev)
126 mdev->mc.vram_base = pci_resource_start(mdev->dev->pdev, 0);
127 mdev->mc.vram_window = pci_resource_len(mdev->dev->pdev, 0);
129 if (!devm_request_mem_region(mdev->dev->dev, mdev->mc.vram_base, mdev->mc.vram_window,
131 DRM_ERROR("can't reserve VRAM\n");
135 mem = pci_iomap(mdev->dev->pdev, 0, 0);
139 mdev->mc.vram_size = mga_probe_vram(mdev, mem);
141 pci_iounmap(mdev->dev->pdev, mem);
146 static int mgag200_device_init(struct drm_device *dev,
149 struct mga_device *mdev = dev->dev_private;
154 /* Hardcode the number of CRTCs to 1 */
157 pci_read_config_dword(dev->pdev, PCI_MGA_OPTION, &option);
158 mdev->has_sdram = !(option & (1 << 14));
160 /* BAR 0 is the framebuffer, BAR 1 contains registers */
161 mdev->rmmio_base = pci_resource_start(mdev->dev->pdev, 1);
162 mdev->rmmio_size = pci_resource_len(mdev->dev->pdev, 1);
164 if (!devm_request_mem_region(mdev->dev->dev, mdev->rmmio_base, mdev->rmmio_size,
166 DRM_ERROR("can't reserve mmio registers\n");
170 mdev->rmmio = pcim_iomap(dev->pdev, 1, 0);
171 if (mdev->rmmio == NULL)
174 /* stash G200 SE model number for later use */
175 if (IS_G200_SE(mdev))
176 mdev->unique_rev_id = RREG32(0x1e24);
178 ret = mga_vram_init(mdev);
182 mdev->bpp_shifts[0] = 0;
183 mdev->bpp_shifts[1] = 1;
184 mdev->bpp_shifts[2] = 0;
185 mdev->bpp_shifts[3] = 2;
190 * Functions here will be called by the core once it's bound the driver to
195 int mgag200_driver_load(struct drm_device *dev, unsigned long flags)
197 struct mga_device *mdev;
200 mdev = devm_kzalloc(dev->dev, sizeof(struct mga_device), GFP_KERNEL);
203 dev->dev_private = (void *)mdev;
206 r = mgag200_device_init(dev, flags);
208 dev_err(&dev->pdev->dev, "Fatal error during GPU init: %d\n", r);
211 r = mgag200_mm_init(mdev);
215 drm_mode_config_init(dev);
216 dev->mode_config.funcs = (void *)&mga_mode_funcs;
217 if (IS_G200_SE(mdev) && mdev->mc.vram_size < (2048*1024))
218 dev->mode_config.preferred_depth = 16;
220 dev->mode_config.preferred_depth = 24;
221 dev->mode_config.prefer_shadow = 1;
223 r = mgag200_modeset_init(mdev);
225 dev_err(&dev->pdev->dev, "Fatal error during modeset init: %d\n", r);
229 /* Make small buffers to store a hardware cursor (double buffered icon updates) */
230 mdev->cursor.pixels_1 = drm_gem_vram_create(dev, &dev->vram_mm->bdev,
231 roundup(48*64, PAGE_SIZE),
233 mdev->cursor.pixels_2 = drm_gem_vram_create(dev, &dev->vram_mm->bdev,
234 roundup(48*64, PAGE_SIZE),
236 if (IS_ERR(mdev->cursor.pixels_2) || IS_ERR(mdev->cursor.pixels_1)) {
237 mdev->cursor.pixels_1 = NULL;
238 mdev->cursor.pixels_2 = NULL;
239 dev_warn(&dev->pdev->dev,
240 "Could not allocate space for cursors. Not doing hardware cursors.\n");
242 mdev->cursor.pixels_current = NULL;
247 drm_mode_config_cleanup(dev);
248 mgag200_mm_fini(mdev);
250 dev->dev_private = NULL;
255 void mgag200_driver_unload(struct drm_device *dev)
257 struct mga_device *mdev = dev->dev_private;
261 mgag200_modeset_fini(mdev);
262 mgag200_fbdev_fini(mdev);
263 drm_mode_config_cleanup(dev);
264 mgag200_mm_fini(mdev);
265 dev->dev_private = NULL;
268 int mgag200_gem_create(struct drm_device *dev,
269 u32 size, bool iskernel,
270 struct drm_gem_object **obj)
272 struct drm_gem_vram_object *gbo;
277 size = roundup(size, PAGE_SIZE);
281 gbo = drm_gem_vram_create(dev, &dev->vram_mm->bdev, size, 0, false);
284 if (ret != -ERESTARTSYS)
285 DRM_ERROR("failed to allocate GEM object\n");