[deliverable/linux.git] / drivers / gpu / drm / cirrus / cirrus_main.c

/*
 * 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
 *          Dave Airlie
 */
#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>

#include "cirrus_drv.h"


static void cirrus_user_framebuffer_destroy(struct drm_framebuffer *fb)
{
	struct cirrus_framebuffer *cirrus_fb = to_cirrus_framebuffer(fb);
	if (cirrus_fb->obj)
		drm_gem_object_unreference_unlocked(cirrus_fb->obj);
	drm_framebuffer_cleanup(fb);
	kfree(fb);
}

static const struct drm_framebuffer_funcs cirrus_fb_funcs = {
	.destroy = cirrus_user_framebuffer_destroy,
};

int cirrus_framebuffer_init(struct drm_device *dev,
			    struct cirrus_framebuffer *gfb,
			    struct drm_mode_fb_cmd2 *mode_cmd,
			    struct drm_gem_object *obj)
{
	int ret;

	drm_helper_mode_fill_fb_struct(&gfb->base, mode_cmd);
	gfb->obj = obj;
	ret = drm_framebuffer_init(dev, &gfb->base, &cirrus_fb_funcs);
	if (ret) {
		DRM_ERROR("drm_framebuffer_init failed: %d\n", ret);
		return ret;
	}
	return 0;
}

static struct drm_framebuffer *
cirrus_user_framebuffer_create(struct drm_device *dev,
			       struct drm_file *filp,
			       struct drm_mode_fb_cmd2 *mode_cmd)
{
	struct drm_gem_object *obj;
	struct cirrus_framebuffer *cirrus_fb;
	int ret;
	u32 bpp, depth;

	drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp);
	/* cirrus can't handle > 24bpp framebuffers at all */
	if (bpp > 24)
		return ERR_PTR(-EINVAL);

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

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

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

static const struct drm_mode_config_funcs cirrus_mode_funcs = {
	.fb_create = cirrus_user_framebuffer_create,
};

/* Unmap the framebuffer from the core and release the memory */
static void cirrus_vram_fini(struct cirrus_device *cdev)
{
	iounmap(cdev->rmmio);
	cdev->rmmio = NULL;
	if (cdev->mc.vram_base)
		release_mem_region(cdev->mc.vram_base, cdev->mc.vram_size);
}

/* Map the framebuffer from the card and configure the core */
static int cirrus_vram_init(struct cirrus_device *cdev)
{
	/* BAR 0 is VRAM */
	cdev->mc.vram_base = pci_resource_start(cdev->dev->pdev, 0);
	/* We have 4MB of VRAM */
	cdev->mc.vram_size = 4 * 1024 * 1024;

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

	return 0;
}

/*
 * Our emulated hardware has two sets of memory. One is video RAM and can
 * simply be used as a linear framebuffer - the other provides mmio access
 * to the display registers. The latter can also be accessed via IO port
 * access, but we map the range and use mmio to program them instead
 */

int cirrus_device_init(struct cirrus_device *cdev,
		       struct drm_device *ddev,
		       struct pci_dev *pdev, uint32_t flags)
{
	int ret;

	cdev->dev = ddev;
	cdev->flags = flags;

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

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

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

	cdev->rmmio = ioremap(cdev->rmmio_base, cdev->rmmio_size);

	if (cdev->rmmio == NULL)
		return -ENOMEM;

	ret = cirrus_vram_init(cdev);
	if (ret) {
		release_mem_region(cdev->rmmio_base, cdev->rmmio_size);
		return ret;
	}

	return 0;
}

void cirrus_device_fini(struct cirrus_device *cdev)
{
	release_mem_region(cdev->rmmio_base, cdev->rmmio_size);
	cirrus_vram_fini(cdev);
}

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

int cirrus_driver_load(struct drm_device *dev, unsigned long flags)
{
	struct cirrus_device *cdev;
	int r;

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

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

	r = cirrus_mm_init(cdev);
	if (r)
		dev_err(&dev->pdev->dev, "fatal err on mm init\n");

	r = cirrus_modeset_init(cdev);
	if (r)
		dev_err(&dev->pdev->dev, "Fatal error during modeset init: %d\n", r);

	dev->mode_config.funcs = (void *)&cirrus_mode_funcs;
out:
	if (r)
		cirrus_driver_unload(dev);
	return r;
}

int cirrus_driver_unload(struct drm_device *dev)
{
	struct cirrus_device *cdev = dev->dev_private;

	if (cdev == NULL)
		return 0;
	cirrus_modeset_fini(cdev);
	cirrus_mm_fini(cdev);
	cirrus_device_fini(cdev);
	kfree(cdev);
	dev->dev_private = NULL;
	return 0;
}

int cirrus_gem_create(struct drm_device *dev,
		   u32 size, bool iskernel,
		   struct drm_gem_object **obj)
{
	struct cirrus_bo *cirrusbo;
	int ret;

	*obj = NULL;

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

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

int cirrus_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 = cirrus_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;
}

static void cirrus_bo_unref(struct cirrus_bo **bo)
{
	struct ttm_buffer_object *tbo;

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

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

}

void cirrus_gem_free_object(struct drm_gem_object *obj)
{
	struct cirrus_bo *cirrus_bo = gem_to_cirrus_bo(obj);

	if (!cirrus_bo)
		return;
	cirrus_bo_unref(&cirrus_bo);
}


static inline u64 cirrus_bo_mmap_offset(struct cirrus_bo *bo)
{
	return drm_vma_node_offset_addr(&bo->bo.vma_node);
}

int
cirrus_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 cirrus_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_cirrus_bo(obj);
	*offset = cirrus_bo_mmap_offset(bo);

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

}
Commit	Line	Data
f9aa76a8 DA	1	/*
	2	* Copyright 2012 Red Hat
	3	*
	4	* This file is subject to the terms and conditions of the GNU General
	5	* Public License version 2. See the file COPYING in the main
	6	* directory of this archive for more details.
	7	*
	8	* Authors: Matthew Garrett
	9	* Dave Airlie
	10	*/
760285e7 DH	11	#include <drm/drmP.h>
760285e7 DH	12	#include <drm/drm_crtc_helper.h>
f9aa76a8 DA	13
	14	#include "cirrus_drv.h"
	15
	16
	17	static void cirrus_user_framebuffer_destroy(struct drm_framebuffer *fb)
	18	{
	19	struct cirrus_framebuffer *cirrus_fb = to_cirrus_framebuffer(fb);
	20	if (cirrus_fb->obj)
	21	drm_gem_object_unreference_unlocked(cirrus_fb->obj);
	22	drm_framebuffer_cleanup(fb);
	23	kfree(fb);
	24	}
	25
f9aa76a8 DA	26	static const struct drm_framebuffer_funcs cirrus_fb_funcs = {
f9aa76a8 DA	27	.destroy = cirrus_user_framebuffer_destroy,
f9aa76a8 DA	28	};
	29
	30	int cirrus_framebuffer_init(struct drm_device *dev,
	31	struct cirrus_framebuffer *gfb,
	32	struct drm_mode_fb_cmd2 *mode_cmd,
	33	struct drm_gem_object *obj)
	34	{
	35	int ret;
	36
c7d73f6a DV	37	drm_helper_mode_fill_fb_struct(&gfb->base, mode_cmd);
c7d73f6a DV	38	gfb->obj = obj;
f9aa76a8 DA	39	ret = drm_framebuffer_init(dev, &gfb->base, &cirrus_fb_funcs);
	40	if (ret) {
	41	DRM_ERROR("drm_framebuffer_init failed: %d\n", ret);
	42	return ret;
	43	}
f9aa76a8 DA	44	return 0;
	45	}
	46
	47	static struct drm_framebuffer *
	48	cirrus_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 cirrus_framebuffer *cirrus_fb;
	54	int ret;
	55	u32 bpp, depth;
	56
	57	drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp);
	58	/* cirrus can't handle > 24bpp framebuffers at all */
	59	if (bpp > 24)
	60	return ERR_PTR(-EINVAL);
	61
	62	obj = drm_gem_object_lookup(dev, filp, mode_cmd->handles[0]);
	63	if (obj == NULL)
	64	return ERR_PTR(-ENOENT);
	65
	66	cirrus_fb = kzalloc(sizeof(*cirrus_fb), GFP_KERNEL);
	67	if (!cirrus_fb) {
	68	drm_gem_object_unreference_unlocked(obj);
	69	return ERR_PTR(-ENOMEM);
	70	}
	71
	72	ret = cirrus_framebuffer_init(dev, cirrus_fb, mode_cmd, obj);
	73	if (ret) {
	74	drm_gem_object_unreference_unlocked(obj);
	75	kfree(cirrus_fb);
	76	return ERR_PTR(ret);
	77	}
	78	return &cirrus_fb->base;
	79	}
	80
	81	static const struct drm_mode_config_funcs cirrus_mode_funcs = {
	82	.fb_create = cirrus_user_framebuffer_create,
	83	};
	84
	85	/* Unmap the framebuffer from the core and release the memory */
	86	static void cirrus_vram_fini(struct cirrus_device *cdev)
	87	{
	88	iounmap(cdev->rmmio);
	89	cdev->rmmio = NULL;
	90	if (cdev->mc.vram_base)
	91	release_mem_region(cdev->mc.vram_base, cdev->mc.vram_size);
	92	}
	93
	94	/* Map the framebuffer from the card and configure the core */
	95	static int cirrus_vram_init(struct cirrus_device *cdev)
	96	{
	97	/* BAR 0 is VRAM */
	98	cdev->mc.vram_base = pci_resource_start(cdev->dev->pdev, 0);
	99	/* We have 4MB of VRAM */
	100	cdev->mc.vram_size = 4 * 1024 * 1024;
	101
	102	if (!request_mem_region(cdev->mc.vram_base, cdev->mc.vram_size,
	103	"cirrusdrmfb_vram")) {
	104	DRM_ERROR("can't reserve VRAM\n");
	105	return -ENXIO;
	106	}
	107
108	return 0;
109	}
110
111	/*
112	* Our emulated hardware has two sets of memory. One is video RAM and can
113	* simply be used as a linear framebuffer - the other provides mmio access
114	* to the display registers. The latter can also be accessed via IO port
115	* access, but we map the range and use mmio to program them instead
116	*/
117
118	int cirrus_device_init(struct cirrus_device *cdev,
119	struct drm_device *ddev,
120	struct pci_dev *pdev, uint32_t flags)
121	{
122	int ret;
123
124	cdev->dev = ddev;
125	cdev->flags = flags;
126
127	/* Hardcode the number of CRTCs to 1 */
128	cdev->num_crtc = 1;
129
130	/* BAR 0 is the framebuffer, BAR 1 contains registers */
131	cdev->rmmio_base = pci_resource_start(cdev->dev->pdev, 1);
132	cdev->rmmio_size = pci_resource_len(cdev->dev->pdev, 1);
133
134	if (!request_mem_region(cdev->rmmio_base, cdev->rmmio_size,
135	"cirrusdrmfb_mmio")) {
136	DRM_ERROR("can't reserve mmio registers\n");
137	return -ENOMEM;
138	}
139
140	cdev->rmmio = ioremap(cdev->rmmio_base, cdev->rmmio_size);
141
142	if (cdev->rmmio == NULL)
143	return -ENOMEM;
144
145	ret = cirrus_vram_init(cdev);
146	if (ret) {
147	release_mem_region(cdev->rmmio_base, cdev->rmmio_size);
148	return ret;
149	}
150
151	return 0;
152	}
153
154	void cirrus_device_fini(struct cirrus_device *cdev)
155	{
156	release_mem_region(cdev->rmmio_base, cdev->rmmio_size);
157	cirrus_vram_fini(cdev);
158	}
159
160	/*
161	* Functions here will be called by the core once it's bound the driver to
162	* a PCI device
163	*/
164
165	int cirrus_driver_load(struct drm_device *dev, unsigned long flags)
166	{
167	struct cirrus_device *cdev;
168	int r;
169
170	cdev = kzalloc(sizeof(struct cirrus_device), GFP_KERNEL);
171	if (cdev == NULL)
172	return -ENOMEM;
173	dev->dev_private = (void *)cdev;
174
175	r = cirrus_device_init(cdev, dev, dev->pdev, flags);
176	if (r) {
177	dev_err(&dev->pdev->dev, "Fatal error during GPU init: %d\n", r);
178	goto out;
179	}
180
181	r = cirrus_mm_init(cdev);
182	if (r)
183	dev_err(&dev->pdev->dev, "fatal err on mm init\n");
184
185	r = cirrus_modeset_init(cdev);
186	if (r)
187	dev_err(&dev->pdev->dev, "Fatal error during modeset init: %d\n", r);
188
189	dev->mode_config.funcs = (void *)&cirrus_mode_funcs;
190	out:
191	if (r)
192	cirrus_driver_unload(dev);
193	return r;
194	}
195
196	int cirrus_driver_unload(struct drm_device *dev)
197	{
198	struct cirrus_device *cdev = dev->dev_private;
199
200	if (cdev == NULL)
201	return 0;
202	cirrus_modeset_fini(cdev);
203	cirrus_mm_fini(cdev);
204	cirrus_device_fini(cdev);
205	kfree(cdev);
206	dev->dev_private = NULL;
207	return 0;
208	}
209
210	int cirrus_gem_create(struct drm_device *dev,
211	u32 size, bool iskernel,
212	struct drm_gem_object **obj)
213	{
214	struct cirrus_bo *cirrusbo;
215	int ret;
216
217	*obj = NULL;
218
219	size = roundup(size, PAGE_SIZE);
220	if (size == 0)
221	return -EINVAL;
222
223	ret = cirrus_bo_create(dev, size, 0, 0, &cirrusbo);
224	if (ret) {
225	if (ret != -ERESTARTSYS)
226	DRM_ERROR("failed to allocate GEM object\n");
227	return ret;
228	}
229	*obj = &cirrusbo->gem;
230	return 0;
231	}
232
233	int cirrus_dumb_create(struct drm_file *file,
234	struct drm_device *dev,
235	struct drm_mode_create_dumb *args)
236	{
237	int ret;
238	struct drm_gem_object *gobj;
239	u32 handle;
240
241	args->pitch = args->width * ((args->bpp + 7) / 8);
242	args->size = args->pitch * args->height;
243
244	ret = cirrus_gem_create(dev, args->size, false,
245	&gobj);
246	if (ret)
247	return ret;
248
249	ret = drm_gem_handle_create(file, gobj, &handle);
250	drm_gem_object_unreference_unlocked(gobj);
251	if (ret)
252	return ret;
253
254	args->handle = handle;
255	return 0;
256	}
257
70d5422b	258	static void cirrus_bo_unref(struct cirrus_bo **bo)
f9aa76a8 DA	259	{
	260	struct ttm_buffer_object *tbo;
	261
	262	if ((*bo) == NULL)
	263	return;
	264
	265	tbo = &((*bo)->bo);
	266	ttm_bo_unref(&tbo);
	267	if (tbo == NULL)
	268	*bo = NULL;
	269
	270	}
	271
	272	void cirrus_gem_free_object(struct drm_gem_object *obj)
	273	{
	274	struct cirrus_bo *cirrus_bo = gem_to_cirrus_bo(obj);
	275
	276	if (!cirrus_bo)
	277	return;
	278	cirrus_bo_unref(&cirrus_bo);
	279	}
	280
	281
	282	static inline u64 cirrus_bo_mmap_offset(struct cirrus_bo *bo)
	283	{
72525b3f	284	return drm_vma_node_offset_addr(&bo->bo.vma_node);
f9aa76a8 DA	285	}
	286
	287	int
	288	cirrus_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 cirrus_bo *bo;
	296
	297	mutex_lock(&dev->struct_mutex);
	298	obj = drm_gem_object_lookup(dev, file, handle);
	299	if (obj == NULL) {
	300	ret = -ENOENT;
	301	goto out_unlock;
	302	}
	303
	304	bo = gem_to_cirrus_bo(obj);
	305	*offset = cirrus_bo_mmap_offset(bo);
	306
	307	drm_gem_object_unreference(obj);
	308	ret = 0;
	309	out_unlock:
	310	mutex_unlock(&dev->struct_mutex);
	311	return ret;
	312
	313	}