[mirror_ubuntu-artful-kernel.git] / drivers / gpu / drm / mgag200 / mgag200_main.c

/*
 * Copyright 2010 Matt Turner.
 * Copyright 2012 Red Hat
 *
 * This file is subject to the terms and conditions of the GNU General
 * Public License version 2. See the file COPYING in the main
 * directory of this archive for more details.
 *
 * Authors: Matthew Garrett
 *          Matt Turner
 *          Dave Airlie
 */
#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>
#include "mgag200_drv.h"

static void mga_user_framebuffer_destroy(struct drm_framebuffer *fb)
{
	struct mga_framebuffer *mga_fb = to_mga_framebuffer(fb);
	if (mga_fb->obj)
		drm_gem_object_unreference_unlocked(mga_fb->obj);
	drm_framebuffer_cleanup(fb);
	kfree(fb);
}

static int mga_user_framebuffer_create_handle(struct drm_framebuffer *fb,
						 struct drm_file *file_priv,
						 unsigned int *handle)
{
	return 0;
}

static const struct drm_framebuffer_funcs mga_fb_funcs = {
	.destroy = mga_user_framebuffer_destroy,
	.create_handle = mga_user_framebuffer_create_handle,
};

int mgag200_framebuffer_init(struct drm_device *dev,
			     struct mga_framebuffer *gfb,
			     struct drm_mode_fb_cmd2 *mode_cmd,
			     struct drm_gem_object *obj)
{
	int ret = drm_framebuffer_init(dev, &gfb->base, &mga_fb_funcs);
	if (ret) {
		DRM_ERROR("drm_framebuffer_init failed: %d\n", ret);
		return ret;
	}
	drm_helper_mode_fill_fb_struct(&gfb->base, mode_cmd);
	gfb->obj = obj;
	return 0;
}

static struct drm_framebuffer *
mgag200_user_framebuffer_create(struct drm_device *dev,
				struct drm_file *filp,
				struct drm_mode_fb_cmd2 *mode_cmd)
{
	struct drm_gem_object *obj;
	struct mga_framebuffer *mga_fb;
	int ret;

	obj = drm_gem_object_lookup(dev, filp, mode_cmd->handles[0]);
	if (obj == NULL)
		return ERR_PTR(-ENOENT);

	mga_fb = kzalloc(sizeof(*mga_fb), GFP_KERNEL);
	if (!mga_fb) {
		drm_gem_object_unreference_unlocked(obj);
		return ERR_PTR(-ENOMEM);
	}

	ret = mgag200_framebuffer_init(dev, mga_fb, mode_cmd, obj);
	if (ret) {
		drm_gem_object_unreference_unlocked(obj);
		kfree(mga_fb);
		return ERR_PTR(ret);
	}
	return &mga_fb->base;
}

static const struct drm_mode_config_funcs mga_mode_funcs = {
	.fb_create = mgag200_user_framebuffer_create,
};

/* Unmap the framebuffer from the core and release the memory */
static void mga_vram_fini(struct mga_device *mdev)
{
	pci_iounmap(mdev->dev->pdev, mdev->rmmio);
	mdev->rmmio = NULL;
	if (mdev->mc.vram_base)
		release_mem_region(mdev->mc.vram_base, mdev->mc.vram_window);
}

static int mga_probe_vram(struct mga_device *mdev, void __iomem *mem)
{
	int offset;
	int orig;
	int test1, test2;
	int orig1, orig2;

	/* Probe */
	orig = ioread16(mem);
	iowrite16(0, mem);

	for (offset = 0x100000; offset < mdev->mc.vram_window; offset += 0x4000) {
		orig1 = ioread8(mem + offset);
		orig2 = ioread8(mem + offset + 0x100);

		iowrite16(0xaa55, mem + offset);
		iowrite16(0xaa55, mem + offset + 0x100);

		test1 = ioread16(mem + offset);
		test2 = ioread16(mem);

		iowrite16(orig1, mem + offset);
		iowrite16(orig2, mem + offset + 0x100);

		if (test1 != 0xaa55) {
			break;
		}

		if (test2) {
			break;
		}
	}

	iowrite16(orig, mem);
	return offset - 65536;
}

/* Map the framebuffer from the card and configure the core */
static int mga_vram_init(struct mga_device *mdev)
{
	void __iomem *mem;
	struct apertures_struct *aper = alloc_apertures(1);
	if (!aper)
		return -ENOMEM;

	/* BAR 0 is VRAM */
	mdev->mc.vram_base = pci_resource_start(mdev->dev->pdev, 0);
	mdev->mc.vram_window = pci_resource_len(mdev->dev->pdev, 0);

	aper->ranges[0].base = mdev->mc.vram_base;
	aper->ranges[0].size = mdev->mc.vram_window;
	aper->count = 1;

	remove_conflicting_framebuffers(aper, "mgafb", true);

	if (!request_mem_region(mdev->mc.vram_base, mdev->mc.vram_window,
				"mgadrmfb_vram")) {
		DRM_ERROR("can't reserve VRAM\n");
		return -ENXIO;
	}

	mem = pci_iomap(mdev->dev->pdev, 0, 0);

	mdev->mc.vram_size = mga_probe_vram(mdev, mem);

	pci_iounmap(mdev->dev->pdev, mem);

	return 0;
}

static int mgag200_device_init(struct drm_device *dev,
			       uint32_t flags)
{
	struct mga_device *mdev = dev->dev_private;
	int ret, option;

	mdev->type = flags;

	/* Hardcode the number of CRTCs to 1 */
	mdev->num_crtc = 1;

	pci_read_config_dword(dev->pdev, PCI_MGA_OPTION, &option);
	mdev->has_sdram = !(option & (1 << 14));

	/* BAR 0 is the framebuffer, BAR 1 contains registers */
	mdev->rmmio_base = pci_resource_start(mdev->dev->pdev, 1);
	mdev->rmmio_size = pci_resource_len(mdev->dev->pdev, 1);

	if (!request_mem_region(mdev->rmmio_base, mdev->rmmio_size,
				"mgadrmfb_mmio")) {
		DRM_ERROR("can't reserve mmio registers\n");
		return -ENOMEM;
	}

	mdev->rmmio = pci_iomap(dev->pdev, 1, 0);
	if (mdev->rmmio == NULL)
		return -ENOMEM;

	/* stash G200 SE model number for later use */
	if (IS_G200_SE(mdev))
		mdev->reg_1e24 = RREG32(0x1e24);

	ret = mga_vram_init(mdev);
	if (ret) {
		release_mem_region(mdev->rmmio_base, mdev->rmmio_size);
		return ret;
	}

	mdev->bpp_shifts[0] = 0;
	mdev->bpp_shifts[1] = 1;
	mdev->bpp_shifts[2] = 0;
	mdev->bpp_shifts[3] = 2;
	return 0;
}

void mgag200_device_fini(struct mga_device *mdev)
{
	release_mem_region(mdev->rmmio_base, mdev->rmmio_size);
	mga_vram_fini(mdev);
}

/*
 * Functions here will be called by the core once it's bound the driver to
 * a PCI device
 */


int mgag200_driver_load(struct drm_device *dev, unsigned long flags)
{
	struct mga_device *mdev;
	int r;

	mdev = kzalloc(sizeof(struct mga_device), GFP_KERNEL);
	if (mdev == NULL)
		return -ENOMEM;
	dev->dev_private = (void *)mdev;
	mdev->dev = dev;

	r = mgag200_device_init(dev, flags);
	if (r) {
		dev_err(&dev->pdev->dev, "Fatal error during GPU init: %d\n", r);
		goto out;
	}
	r = mgag200_mm_init(mdev);
	if (r)
		goto out;

	drm_mode_config_init(dev);
	dev->mode_config.funcs = (void *)&mga_mode_funcs;
	dev->mode_config.min_width = 0;
	dev->mode_config.min_height = 0;
	dev->mode_config.preferred_depth = 24;
	dev->mode_config.prefer_shadow = 1;

	r = mgag200_modeset_init(mdev);
	if (r)
		dev_err(&dev->pdev->dev, "Fatal error during modeset init: %d\n", r);
out:
	if (r)
		mgag200_driver_unload(dev);
	return r;
}

int mgag200_driver_unload(struct drm_device *dev)
{
	struct mga_device *mdev = dev->dev_private;

	if (mdev == NULL)
		return 0;
	mgag200_modeset_fini(mdev);
	mgag200_fbdev_fini(mdev);
	drm_mode_config_cleanup(dev);
	mgag200_mm_fini(mdev);
	mgag200_device_fini(mdev);
	kfree(mdev);
	dev->dev_private = NULL;
	return 0;
}

int mgag200_gem_create(struct drm_device *dev,
		   u32 size, bool iskernel,
		   struct drm_gem_object **obj)
{
	struct mgag200_bo *astbo;
	int ret;

	*obj = NULL;

	size = roundup(size, PAGE_SIZE);
	if (size == 0)
		return -EINVAL;

	ret = mgag200_bo_create(dev, size, 0, 0, &astbo);
	if (ret) {
		if (ret != -ERESTARTSYS)
			DRM_ERROR("failed to allocate GEM object\n");
		return ret;
	}
	*obj = &astbo->gem;
	return 0;
}

int mgag200_dumb_create(struct drm_file *file,
		    struct drm_device *dev,
		    struct drm_mode_create_dumb *args)
{
	int ret;
	struct drm_gem_object *gobj;
	u32 handle;

	args->pitch = args->width * ((args->bpp + 7) / 8);
	args->size = args->pitch * args->height;

	ret = mgag200_gem_create(dev, args->size, false,
			     &gobj);
	if (ret)
		return ret;

	ret = drm_gem_handle_create(file, gobj, &handle);
	drm_gem_object_unreference_unlocked(gobj);
	if (ret)
		return ret;

	args->handle = handle;
	return 0;
}

int mgag200_dumb_destroy(struct drm_file *file,
		     struct drm_device *dev,
		     uint32_t handle)
{
	return drm_gem_handle_delete(file, handle);
}

int mgag200_gem_init_object(struct drm_gem_object *obj)
{
	BUG();
	return 0;
}

void mgag200_bo_unref(struct mgag200_bo **bo)
{
	struct ttm_buffer_object *tbo;

	if ((*bo) == NULL)
		return;

	tbo = &((*bo)->bo);
	ttm_bo_unref(&tbo);
	if (tbo == NULL)
		*bo = NULL;

}

void mgag200_gem_free_object(struct drm_gem_object *obj)
{
	struct mgag200_bo *mgag200_bo = gem_to_mga_bo(obj);

	if (!mgag200_bo)
		return;
	mgag200_bo_unref(&mgag200_bo);
}


static inline u64 mgag200_bo_mmap_offset(struct mgag200_bo *bo)
{
	return bo->bo.addr_space_offset;
}

int
mgag200_dumb_mmap_offset(struct drm_file *file,
		     struct drm_device *dev,
		     uint32_t handle,
		     uint64_t *offset)
{
	struct drm_gem_object *obj;
	int ret;
	struct mgag200_bo *bo;

	mutex_lock(&dev->struct_mutex);
	obj = drm_gem_object_lookup(dev, file, handle);
	if (obj == NULL) {
		ret = -ENOENT;
		goto out_unlock;
	}

	bo = gem_to_mga_bo(obj);
	*offset = mgag200_bo_mmap_offset(bo);

	drm_gem_object_unreference(obj);
	ret = 0;
out_unlock:
	mutex_unlock(&dev->struct_mutex);
	return ret;

}
Commit	Line	Data
414c4531 DA	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	*/
760285e7 DH	13	#include <drm/drmP.h>
760285e7 DH	14	#include <drm/drm_crtc_helper.h>
414c4531 DA	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 int mga_user_framebuffer_create_handle(struct drm_framebuffer *fb,
	27	struct drm_file *file_priv,
	28	unsigned int *handle)
	29	{
	30	return 0;
	31	}
	32
	33	static const struct drm_framebuffer_funcs mga_fb_funcs = {
	34	.destroy = mga_user_framebuffer_destroy,
	35	.create_handle = mga_user_framebuffer_create_handle,
	36	};
	37
	38	int mgag200_framebuffer_init(struct drm_device *dev,
	39	struct mga_framebuffer *gfb,
	40	struct drm_mode_fb_cmd2 *mode_cmd,
	41	struct drm_gem_object *obj)
	42	{
	43	int ret = drm_framebuffer_init(dev, &gfb->base, &mga_fb_funcs);
	44	if (ret) {
	45	DRM_ERROR("drm_framebuffer_init failed: %d\n", ret);
	46	return ret;
	47	}
	48	drm_helper_mode_fill_fb_struct(&gfb->base, mode_cmd);
	49	gfb->obj = obj;
	50	return 0;
	51	}
	52
	53	static struct drm_framebuffer *
	54	mgag200_user_framebuffer_create(struct drm_device *dev,
	55	struct drm_file *filp,
	56	struct drm_mode_fb_cmd2 *mode_cmd)
	57	{
	58	struct drm_gem_object *obj;
	59	struct mga_framebuffer *mga_fb;
	60	int ret;
	61
	62	obj = drm_gem_object_lookup(dev, filp, mode_cmd->handles[0]);
	63	if (obj == NULL)
	64	return ERR_PTR(-ENOENT);
	65
	66	mga_fb = kzalloc(sizeof(*mga_fb), GFP_KERNEL);
	67	if (!mga_fb) {
	68	drm_gem_object_unreference_unlocked(obj);
	69	return ERR_PTR(-ENOMEM);
	70	}
	71
	72	ret = mgag200_framebuffer_init(dev, mga_fb, mode_cmd, obj);
	73	if (ret) {
	74	drm_gem_object_unreference_unlocked(obj);
	75	kfree(mga_fb);
	76	return ERR_PTR(ret);
	77	}
	78	return &mga_fb->base;
79	}
80
81	static const struct drm_mode_config_funcs mga_mode_funcs = {
82	.fb_create = mgag200_user_framebuffer_create,
83	};
84
85	/* Unmap the framebuffer from the core and release the memory */
86	static void mga_vram_fini(struct mga_device *mdev)
87	{
88	pci_iounmap(mdev->dev->pdev, mdev->rmmio);
89	mdev->rmmio = NULL;
90	if (mdev->mc.vram_base)
91	release_mem_region(mdev->mc.vram_base, mdev->mc.vram_window);
92	}
93
94	static int mga_probe_vram(struct mga_device mdev, void __iomem mem)
95	{
96	int offset;
97	int orig;
98	int test1, test2;
99	int orig1, orig2;
100
101	/* Probe */
102	orig = ioread16(mem);
103	iowrite16(0, mem);
104
105	for (offset = 0x100000; offset < mdev->mc.vram_window; offset += 0x4000) {
106	orig1 = ioread8(mem + offset);
107	orig2 = ioread8(mem + offset + 0x100);
108
109	iowrite16(0xaa55, mem + offset);
110	iowrite16(0xaa55, mem + offset + 0x100);
111
112	test1 = ioread16(mem + offset);
113	test2 = ioread16(mem);
114
115	iowrite16(orig1, mem + offset);
116	iowrite16(orig2, mem + offset + 0x100);
117
118	if (test1 != 0xaa55) {
119	break;
120	}
121
122	if (test2) {
123	break;
124	}
125	}
126
127	iowrite16(orig, mem);
128	return offset - 65536;
129	}
130
131	/* Map the framebuffer from the card and configure the core */
132	static int mga_vram_init(struct mga_device *mdev)
133	{
134	void __iomem *mem;
135	struct apertures_struct *aper = alloc_apertures(1);
0a7fdc59 TR	136	if (!aper)
0a7fdc59 TR	137	return -ENOMEM;
414c4531 DA	138
	139	/* BAR 0 is VRAM */
	140	mdev->mc.vram_base = pci_resource_start(mdev->dev->pdev, 0);
	141	mdev->mc.vram_window = pci_resource_len(mdev->dev->pdev, 0);
	142
	143	aper->ranges[0].base = mdev->mc.vram_base;
	144	aper->ranges[0].size = mdev->mc.vram_window;
	145	aper->count = 1;
	146
	147	remove_conflicting_framebuffers(aper, "mgafb", true);
	148
	149	if (!request_mem_region(mdev->mc.vram_base, mdev->mc.vram_window,
	150	"mgadrmfb_vram")) {
	151	DRM_ERROR("can't reserve VRAM\n");
	152	return -ENXIO;
	153	}
	154
	155	mem = pci_iomap(mdev->dev->pdev, 0, 0);
	156
	157	mdev->mc.vram_size = mga_probe_vram(mdev, mem);
	158
	159	pci_iounmap(mdev->dev->pdev, mem);
	160
	161	return 0;
	162	}
	163
	164	static int mgag200_device_init(struct drm_device *dev,
	165	uint32_t flags)
	166	{
	167	struct mga_device *mdev = dev->dev_private;
	168	int ret, option;
	169
	170	mdev->type = flags;
	171
	172	/* Hardcode the number of CRTCs to 1 */
	173	mdev->num_crtc = 1;
	174
	175	pci_read_config_dword(dev->pdev, PCI_MGA_OPTION, &option);
	176	mdev->has_sdram = !(option & (1 << 14));
	177
	178	/* BAR 0 is the framebuffer, BAR 1 contains registers */
	179	mdev->rmmio_base = pci_resource_start(mdev->dev->pdev, 1);
	180	mdev->rmmio_size = pci_resource_len(mdev->dev->pdev, 1);
	181
	182	if (!request_mem_region(mdev->rmmio_base, mdev->rmmio_size,
	183	"mgadrmfb_mmio")) {
	184	DRM_ERROR("can't reserve mmio registers\n");
	185	return -ENOMEM;
	186	}
	187
	188	mdev->rmmio = pci_iomap(dev->pdev, 1, 0);
	189	if (mdev->rmmio == NULL)
	190	return -ENOMEM;
	191
	192	/* stash G200 SE model number for later use */
	193	if (IS_G200_SE(mdev))
	194	mdev->reg_1e24 = RREG32(0x1e24);
	195
	196	ret = mga_vram_init(mdev);
	197	if (ret) {
	198	release_mem_region(mdev->rmmio_base, mdev->rmmio_size);
	199	return ret;
	200	}
	201
202	mdev->bpp_shifts[0] = 0;
203	mdev->bpp_shifts[1] = 1;
204	mdev->bpp_shifts[2] = 0;
205	mdev->bpp_shifts[3] = 2;
206	return 0;
207	}
208
209	void mgag200_device_fini(struct mga_device *mdev)
210	{
211	release_mem_region(mdev->rmmio_base, mdev->rmmio_size);
212	mga_vram_fini(mdev);
213	}
214
215	/*
216	* Functions here will be called by the core once it's bound the driver to
217	* a PCI device
218	*/
219
220
221	int mgag200_driver_load(struct drm_device *dev, unsigned long flags)
222	{
223	struct mga_device *mdev;
224	int r;
225
226	mdev = kzalloc(sizeof(struct mga_device), GFP_KERNEL);
227	if (mdev == NULL)
228	return -ENOMEM;
229	dev->dev_private = (void *)mdev;
230	mdev->dev = dev;
231
232	r = mgag200_device_init(dev, flags);
233	if (r) {
234	dev_err(&dev->pdev->dev, "Fatal error during GPU init: %d\n", r);
235	goto out;
236	}
237	r = mgag200_mm_init(mdev);
238	if (r)
239	goto out;
240
241	drm_mode_config_init(dev);
242	dev->mode_config.funcs = (void *)&mga_mode_funcs;
243	dev->mode_config.min_width = 0;
244	dev->mode_config.min_height = 0;
245	dev->mode_config.preferred_depth = 24;
246	dev->mode_config.prefer_shadow = 1;
247
248	r = mgag200_modeset_init(mdev);
249	if (r)
250	dev_err(&dev->pdev->dev, "Fatal error during modeset init: %d\n", r);
251	out:
252	if (r)
253	mgag200_driver_unload(dev);
254	return r;
255	}
256
257	int mgag200_driver_unload(struct drm_device *dev)
258	{
259	struct mga_device *mdev = dev->dev_private;
260
261	if (mdev == NULL)
262	return 0;
263	mgag200_modeset_fini(mdev);
264	mgag200_fbdev_fini(mdev);
265	drm_mode_config_cleanup(dev);
266	mgag200_mm_fini(mdev);
267	mgag200_device_fini(mdev);
268	kfree(mdev);
269	dev->dev_private = NULL;
270	return 0;
271	}
272
273	int mgag200_gem_create(struct drm_device *dev,
274	u32 size, bool iskernel,
275	struct drm_gem_object **obj)
276	{
277	struct mgag200_bo *astbo;
278	int ret;
279
280	*obj = NULL;
281
282	size = roundup(size, PAGE_SIZE);
283	if (size == 0)
284	return -EINVAL;
285
286	ret = mgag200_bo_create(dev, size, 0, 0, &astbo);
287	if (ret) {
288	if (ret != -ERESTARTSYS)
289	DRM_ERROR("failed to allocate GEM object\n");
290	return ret;
291	}
292	*obj = &astbo->gem;
293	return 0;
294	}
295
296	int mgag200_dumb_create(struct drm_file *file,
297	struct drm_device *dev,
298	struct drm_mode_create_dumb *args)
299	{
300	int ret;
301	struct drm_gem_object *gobj;
302	u32 handle;
303
304	args->pitch = args->width * ((args->bpp + 7) / 8);
305	args->size = args->pitch * args->height;
306
307	ret = mgag200_gem_create(dev, args->size, false,
308	&gobj);
309	if (ret)
310	return ret;
311
312	ret = drm_gem_handle_create(file, gobj, &handle);
313	drm_gem_object_unreference_unlocked(gobj);
314	if (ret)
315	return ret;
316
317	args->handle = handle;
318	return 0;
319	}
320
321	int mgag200_dumb_destroy(struct drm_file *file,
322	struct drm_device *dev,
323	uint32_t handle)
324	{
325	return drm_gem_handle_delete(file, handle);
326	}
327
328	int mgag200_gem_init_object(struct drm_gem_object *obj)
329	{
330	BUG();
331	return 0;
332	}
333
334	void mgag200_bo_unref(struct mgag200_bo **bo)
335	{
336	struct ttm_buffer_object *tbo;
337
338	if ((*bo) == NULL)
339	return;
340
341	tbo = &((*bo)->bo);
342	ttm_bo_unref(&tbo);
343	if (tbo == NULL)
344	*bo = NULL;
345
346	}
347
348	void mgag200_gem_free_object(struct drm_gem_object *obj)
349	{
350	struct mgag200_bo *mgag200_bo = gem_to_mga_bo(obj);
351
352	if (!mgag200_bo)
353	return;
354	mgag200_bo_unref(&mgag200_bo);
355	}
356
357
358	static inline u64 mgag200_bo_mmap_offset(struct mgag200_bo *bo)
359	{
360	return bo->bo.addr_space_offset;
361	}
362
363	int
364	mgag200_dumb_mmap_offset(struct drm_file *file,
365	struct drm_device *dev,
366	uint32_t handle,
367	uint64_t *offset)
368	{
369	struct drm_gem_object *obj;
370	int ret;
371	struct mgag200_bo *bo;
372
373	mutex_lock(&dev->struct_mutex);
374	obj = drm_gem_object_lookup(dev, file, handle);
375	if (obj == NULL) {
376	ret = -ENOENT;
377	goto out_unlock;
378	}
379
380	bo = gem_to_mga_bo(obj);
381	*offset = mgag200_bo_mmap_offset(bo);
382
383	drm_gem_object_unreference(obj);
384	ret = 0;
385	out_unlock:
386	mutex_unlock(&dev->struct_mutex);
387	return ret;
388
389	}