[mirror_ubuntu-bionic-kernel.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 int cirrus_user_framebuffer_create_handle(struct drm_framebuffer *fb,
						 struct drm_file *file_priv,
						 unsigned int *handle)
{
	return 0;
}

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

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;

	ret = drm_framebuffer_init(dev, &gfb->base, &cirrus_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 *
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;
}

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

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

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 bo->bo.addr_space_offset;
}

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
	26	static int cirrus_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 cirrus_fb_funcs = {
	34	.destroy = cirrus_user_framebuffer_destroy,
	35	.create_handle = cirrus_user_framebuffer_create_handle,
	36	};
	37
	38	int cirrus_framebuffer_init(struct drm_device *dev,
	39	struct cirrus_framebuffer *gfb,
	40	struct drm_mode_fb_cmd2 *mode_cmd,
	41	struct drm_gem_object *obj)
	42	{
	43	int ret;
	44
	45	ret = drm_framebuffer_init(dev, &gfb->base, &cirrus_fb_funcs);
	46	if (ret) {
	47	DRM_ERROR("drm_framebuffer_init failed: %d\n", ret);
	48	return ret;
	49	}
	50	drm_helper_mode_fill_fb_struct(&gfb->base, mode_cmd);
	51	gfb->obj = obj;
	52	return 0;
	53	}
	54
	55	static struct drm_framebuffer *
	56	cirrus_user_framebuffer_create(struct drm_device *dev,
	57	struct drm_file *filp,
	58	struct drm_mode_fb_cmd2 *mode_cmd)
	59	{
	60	struct drm_gem_object *obj;
	61	struct cirrus_framebuffer *cirrus_fb;
	62	int ret;
	63	u32 bpp, depth;
	64
	65	drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp);
	66	/* cirrus can't handle > 24bpp framebuffers at all */
	67	if (bpp > 24)
	68	return ERR_PTR(-EINVAL);
	69
	70	obj = drm_gem_object_lookup(dev, filp, mode_cmd->handles[0]);
	71	if (obj == NULL)
	72	return ERR_PTR(-ENOENT);
	73
	74	cirrus_fb = kzalloc(sizeof(*cirrus_fb), GFP_KERNEL);
	75	if (!cirrus_fb) {
	76	drm_gem_object_unreference_unlocked(obj);
77	return ERR_PTR(-ENOMEM);
78	}
79
80	ret = cirrus_framebuffer_init(dev, cirrus_fb, mode_cmd, obj);
81	if (ret) {
82	drm_gem_object_unreference_unlocked(obj);
83	kfree(cirrus_fb);
84	return ERR_PTR(ret);
85	}
86	return &cirrus_fb->base;
87	}
88
89	static const struct drm_mode_config_funcs cirrus_mode_funcs = {
90	.fb_create = cirrus_user_framebuffer_create,
91	};
92
93	/* Unmap the framebuffer from the core and release the memory */
94	static void cirrus_vram_fini(struct cirrus_device *cdev)
95	{
96	iounmap(cdev->rmmio);
97	cdev->rmmio = NULL;
98	if (cdev->mc.vram_base)
99	release_mem_region(cdev->mc.vram_base, cdev->mc.vram_size);
100	}
101
102	/* Map the framebuffer from the card and configure the core */
103	static int cirrus_vram_init(struct cirrus_device *cdev)
104	{
105	/* BAR 0 is VRAM */
106	cdev->mc.vram_base = pci_resource_start(cdev->dev->pdev, 0);
107	/* We have 4MB of VRAM */
108	cdev->mc.vram_size = 4 * 1024 * 1024;
109
110	if (!request_mem_region(cdev->mc.vram_base, cdev->mc.vram_size,
111	"cirrusdrmfb_vram")) {
112	DRM_ERROR("can't reserve VRAM\n");
113	return -ENXIO;
114	}
115
116	return 0;
117	}
118
119	/*
120	* Our emulated hardware has two sets of memory. One is video RAM and can
121	* simply be used as a linear framebuffer - the other provides mmio access
122	* to the display registers. The latter can also be accessed via IO port
123	* access, but we map the range and use mmio to program them instead
124	*/
125
126	int cirrus_device_init(struct cirrus_device *cdev,
127	struct drm_device *ddev,
128	struct pci_dev *pdev, uint32_t flags)
129	{
130	int ret;
131
132	cdev->dev = ddev;
133	cdev->flags = flags;
134
135	/* Hardcode the number of CRTCs to 1 */
136	cdev->num_crtc = 1;
137
138	/* BAR 0 is the framebuffer, BAR 1 contains registers */
139	cdev->rmmio_base = pci_resource_start(cdev->dev->pdev, 1);
140	cdev->rmmio_size = pci_resource_len(cdev->dev->pdev, 1);
141
142	if (!request_mem_region(cdev->rmmio_base, cdev->rmmio_size,
143	"cirrusdrmfb_mmio")) {
144	DRM_ERROR("can't reserve mmio registers\n");
145	return -ENOMEM;
146	}
147
148	cdev->rmmio = ioremap(cdev->rmmio_base, cdev->rmmio_size);
149
150	if (cdev->rmmio == NULL)
151	return -ENOMEM;
152
153	ret = cirrus_vram_init(cdev);
154	if (ret) {
155	release_mem_region(cdev->rmmio_base, cdev->rmmio_size);
156	return ret;
157	}
158
159	return 0;
160	}
161
162	void cirrus_device_fini(struct cirrus_device *cdev)
163	{
164	release_mem_region(cdev->rmmio_base, cdev->rmmio_size);
165	cirrus_vram_fini(cdev);
166	}
167
168	/*
169	* Functions here will be called by the core once it's bound the driver to
170	* a PCI device
171	*/
172
173	int cirrus_driver_load(struct drm_device *dev, unsigned long flags)
174	{
175	struct cirrus_device *cdev;
176	int r;
177
178	cdev = kzalloc(sizeof(struct cirrus_device), GFP_KERNEL);
179	if (cdev == NULL)
180	return -ENOMEM;
181	dev->dev_private = (void *)cdev;
182
183	r = cirrus_device_init(cdev, dev, dev->pdev, flags);
184	if (r) {
185	dev_err(&dev->pdev->dev, "Fatal error during GPU init: %d\n", r);
186	goto out;
187	}
188
189	r = cirrus_mm_init(cdev);
190	if (r)
191	dev_err(&dev->pdev->dev, "fatal err on mm init\n");
192
193	r = cirrus_modeset_init(cdev);
194	if (r)
195	dev_err(&dev->pdev->dev, "Fatal error during modeset init: %d\n", r);
196
197	dev->mode_config.funcs = (void *)&cirrus_mode_funcs;
198	out:
199	if (r)
200	cirrus_driver_unload(dev);
201	return r;
202	}
203
204	int cirrus_driver_unload(struct drm_device *dev)
205	{
206	struct cirrus_device *cdev = dev->dev_private;
207
208	if (cdev == NULL)
209	return 0;
210	cirrus_modeset_fini(cdev);
211	cirrus_mm_fini(cdev);
212	cirrus_device_fini(cdev);
213	kfree(cdev);
214	dev->dev_private = NULL;
215	return 0;
216	}
217
218	int cirrus_gem_create(struct drm_device *dev,
219	u32 size, bool iskernel,
220	struct drm_gem_object **obj)
221	{
222	struct cirrus_bo *cirrusbo;
223	int ret;
224
225	*obj = NULL;
226
227	size = roundup(size, PAGE_SIZE);
228	if (size == 0)
229	return -EINVAL;
230
231	ret = cirrus_bo_create(dev, size, 0, 0, &cirrusbo);
232	if (ret) {
233	if (ret != -ERESTARTSYS)
234	DRM_ERROR("failed to allocate GEM object\n");
235	return ret;
236	}
237	*obj = &cirrusbo->gem;
238	return 0;
239	}
240
241	int cirrus_dumb_create(struct drm_file *file,
242	struct drm_device *dev,
243	struct drm_mode_create_dumb *args)
244	{
245	int ret;
246	struct drm_gem_object *gobj;
247	u32 handle;
248
249	args->pitch = args->width * ((args->bpp + 7) / 8);
250	args->size = args->pitch * args->height;
251
252	ret = cirrus_gem_create(dev, args->size, false,
253	&gobj);
254	if (ret)
255	return ret;
256
257	ret = drm_gem_handle_create(file, gobj, &handle);
258	drm_gem_object_unreference_unlocked(gobj);
259	if (ret)
260	return ret;
261
262	args->handle = handle;
263	return 0;
264	}
265
266	int cirrus_dumb_destroy(struct drm_file *file,
267	struct drm_device *dev,
268	uint32_t handle)
269	{
270	return drm_gem_handle_delete(file, handle);
271	}
272
273	int cirrus_gem_init_object(struct drm_gem_object *obj)
274	{
275	BUG();
276	return 0;
277	}
278
279	void cirrus_bo_unref(struct cirrus_bo **bo)
280	{
281	struct ttm_buffer_object *tbo;
282
283	if ((*bo) == NULL)
284	return;
285
286	tbo = &((*bo)->bo);
287	ttm_bo_unref(&tbo);
288	if (tbo == NULL)
289	*bo = NULL;
290
291	}
292
293	void cirrus_gem_free_object(struct drm_gem_object *obj)
294	{
295	struct cirrus_bo *cirrus_bo = gem_to_cirrus_bo(obj);
296
297	if (!cirrus_bo)
298	return;
299	cirrus_bo_unref(&cirrus_bo);
300	}
301
302
303	static inline u64 cirrus_bo_mmap_offset(struct cirrus_bo *bo)
304	{
305	return bo->bo.addr_space_offset;
306	}
307
308	int
309	cirrus_dumb_mmap_offset(struct drm_file *file,
310	struct drm_device *dev,
311	uint32_t handle,
312	uint64_t *offset)
313	{
314	struct drm_gem_object *obj;
315	int ret;
316	struct cirrus_bo *bo;
317
318	mutex_lock(&dev->struct_mutex);
319	obj = drm_gem_object_lookup(dev, file, handle);
320	if (obj == NULL) {
321	ret = -ENOENT;
322	goto out_unlock;
323	}
324
325	bo = gem_to_cirrus_bo(obj);
326	*offset = cirrus_bo_mmap_offset(bo);
327
328	drm_gem_object_unreference(obj);
329	ret = 0;
330	out_unlock:
331	mutex_unlock(&dev->struct_mutex);
332	return ret;
333
334	}