1/**
  2 * \file radeon_ioc32.c
  3 *
  4 * 32-bit ioctl compatibility routines for the Radeon DRM.
  5 *
  6 * \author Paul Mackerras <paulus@samba.org>
  7 *
  8 * Copyright (C) Paul Mackerras 2005
  9 * All Rights Reserved.
 10 *
 11 * Permission is hereby granted, free of charge, to any person obtaining a
 12 * copy of this software and associated documentation files (the "Software"),
 13 * to deal in the Software without restriction, including without limitation
 14 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 15 * and/or sell copies of the Software, and to permit persons to whom the
 16 * Software is furnished to do so, subject to the following conditions:
 17 *
 18 * The above copyright notice and this permission notice (including the next
 19 * paragraph) shall be included in all copies or substantial portions of the
 20 * Software.
 21 *
 22 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 23 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 24 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 25 * THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 26 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 27 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 28 * IN THE SOFTWARE.
 29 */
 30#include <linux/compat.h>
 31
 32#include "drmP.h"
 33#include "drm.h"
 34#include "radeon_drm.h"
 35#include "radeon_drv.h"
 36
 37typedef struct drm_radeon_init32 {
 38	int func;
 39	u32 sarea_priv_offset;
 40	int is_pci;
 41	int cp_mode;
 42	int gart_size;
 43	int ring_size;
 44	int usec_timeout;
 45
 46	unsigned int fb_bpp;
 47	unsigned int front_offset, front_pitch;
 48	unsigned int back_offset, back_pitch;
 49	unsigned int depth_bpp;
 50	unsigned int depth_offset, depth_pitch;
 51
 52	u32 fb_offset;
 53	u32 mmio_offset;
 54	u32 ring_offset;
 55	u32 ring_rptr_offset;
 56	u32 buffers_offset;
 57	u32 gart_textures_offset;
 58} drm_radeon_init32_t;
 59
 60static int compat_radeon_cp_init(struct file *file, unsigned int cmd,
 61				 unsigned long arg)
 62{
 63	drm_radeon_init32_t init32;
 64	drm_radeon_init_t __user *init;
 65
 66	if (copy_from_user(&init32, (void __user *)arg, sizeof(init32)))
 67		return -EFAULT;
 68
 69	init = compat_alloc_user_space(sizeof(*init));
 70	if (!access_ok(VERIFY_WRITE, init, sizeof(*init))
 71	    || __put_user(init32.func, &init->func)
 72	    || __put_user(init32.sarea_priv_offset, &init->sarea_priv_offset)
 73	    || __put_user(init32.is_pci, &init->is_pci)
 74	    || __put_user(init32.cp_mode, &init->cp_mode)
 75	    || __put_user(init32.gart_size, &init->gart_size)
 76	    || __put_user(init32.ring_size, &init->ring_size)
 77	    || __put_user(init32.usec_timeout, &init->usec_timeout)
 78	    || __put_user(init32.fb_bpp, &init->fb_bpp)
 79	    || __put_user(init32.front_offset, &init->front_offset)
 80	    || __put_user(init32.front_pitch, &init->front_pitch)
 81	    || __put_user(init32.back_offset, &init->back_offset)
 82	    || __put_user(init32.back_pitch, &init->back_pitch)
 83	    || __put_user(init32.depth_bpp, &init->depth_bpp)
 84	    || __put_user(init32.depth_offset, &init->depth_offset)
 85	    || __put_user(init32.depth_pitch, &init->depth_pitch)
 86	    || __put_user(init32.fb_offset, &init->fb_offset)
 87	    || __put_user(init32.mmio_offset, &init->mmio_offset)
 88	    || __put_user(init32.ring_offset, &init->ring_offset)
 89	    || __put_user(init32.ring_rptr_offset, &init->ring_rptr_offset)
 90	    || __put_user(init32.buffers_offset, &init->buffers_offset)
 91	    || __put_user(init32.gart_textures_offset,
 92			  &init->gart_textures_offset))
 93		return -EFAULT;
 94
 95	return drm_ioctl(file, DRM_IOCTL_RADEON_CP_INIT, (unsigned long)init);
 96}
 97
 98typedef struct drm_radeon_clear32 {
 99	unsigned int flags;
100	unsigned int clear_color;
101	unsigned int clear_depth;
102	unsigned int color_mask;
103	unsigned int depth_mask;	/* misnamed field:  should be stencil */
104	u32 depth_boxes;
105} drm_radeon_clear32_t;
106
107static int compat_radeon_cp_clear(struct file *file, unsigned int cmd,
108				  unsigned long arg)
109{
110	drm_radeon_clear32_t clr32;
111	drm_radeon_clear_t __user *clr;
112
113	if (copy_from_user(&clr32, (void __user *)arg, sizeof(clr32)))
114		return -EFAULT;
115
116	clr = compat_alloc_user_space(sizeof(*clr));
117	if (!access_ok(VERIFY_WRITE, clr, sizeof(*clr))
118	    || __put_user(clr32.flags, &clr->flags)
119	    || __put_user(clr32.clear_color, &clr->clear_color)
120	    || __put_user(clr32.clear_depth, &clr->clear_depth)
121	    || __put_user(clr32.color_mask, &clr->color_mask)
122	    || __put_user(clr32.depth_mask, &clr->depth_mask)
123	    || __put_user((void __user *)(unsigned long)clr32.depth_boxes,
124			  &clr->depth_boxes))
125		return -EFAULT;
126
127	return drm_ioctl(file, DRM_IOCTL_RADEON_CLEAR, (unsigned long)clr);
128}
129
130typedef struct drm_radeon_stipple32 {
131	u32 mask;
132} drm_radeon_stipple32_t;
133
134static int compat_radeon_cp_stipple(struct file *file, unsigned int cmd,
135				    unsigned long arg)
136{
137	drm_radeon_stipple32_t __user *argp = (void __user *)arg;
138	drm_radeon_stipple_t __user *request;
139	u32 mask;
140
141	if (get_user(mask, &argp->mask))
142		return -EFAULT;
143
144	request = compat_alloc_user_space(sizeof(*request));
145	if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
146	    || __put_user((unsigned int __user *)(unsigned long)mask,
147			  &request->mask))
148		return -EFAULT;
149
150	return drm_ioctl(file, DRM_IOCTL_RADEON_STIPPLE, (unsigned long)request);
151}
152
153typedef struct drm_radeon_tex_image32 {
154	unsigned int x, y;	/* Blit coordinates */
155	unsigned int width, height;
156	u32 data;
157} drm_radeon_tex_image32_t;
158
159typedef struct drm_radeon_texture32 {
160	unsigned int offset;
161	int pitch;
162	int format;
163	int width;		/* Texture image coordinates */
164	int height;
165	u32 image;
166} drm_radeon_texture32_t;
167
168static int compat_radeon_cp_texture(struct file *file, unsigned int cmd,
169				    unsigned long arg)
170{
171	drm_radeon_texture32_t req32;
172	drm_radeon_texture_t __user *request;
173	drm_radeon_tex_image32_t img32;
174	drm_radeon_tex_image_t __user *image;
175
176	if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
177		return -EFAULT;
178	if (req32.image == 0)
179		return -EINVAL;
180	if (copy_from_user(&img32, (void __user *)(unsigned long)req32.image,
181			   sizeof(img32)))
182		return -EFAULT;
183
184	request = compat_alloc_user_space(sizeof(*request) + sizeof(*image));
185	if (!access_ok(VERIFY_WRITE, request,
186		       sizeof(*request) + sizeof(*image)))
187		return -EFAULT;
188	image = (drm_radeon_tex_image_t __user *) (request + 1);
189
190	if (__put_user(req32.offset, &request->offset)
191	    || __put_user(req32.pitch, &request->pitch)
192	    || __put_user(req32.format, &request->format)
193	    || __put_user(req32.width, &request->width)
194	    || __put_user(req32.height, &request->height)
195	    || __put_user(image, &request->image)
196	    || __put_user(img32.x, &image->x)
197	    || __put_user(img32.y, &image->y)
198	    || __put_user(img32.width, &image->width)
199	    || __put_user(img32.height, &image->height)
200	    || __put_user((const void __user *)(unsigned long)img32.data,
201			  &image->data))
202		return -EFAULT;
203
204	return drm_ioctl(file, DRM_IOCTL_RADEON_TEXTURE, (unsigned long)request);
205}
206
207typedef struct drm_radeon_vertex2_32 {
208	int idx;		/* Index of vertex buffer */
209	int discard;		/* Client finished with buffer? */
210	int nr_states;
211	u32 state;
212	int nr_prims;
213	u32 prim;
214} drm_radeon_vertex2_32_t;
215
216static int compat_radeon_cp_vertex2(struct file *file, unsigned int cmd,
217				    unsigned long arg)
218{
219	drm_radeon_vertex2_32_t req32;
220	drm_radeon_vertex2_t __user *request;
221
222	if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
223		return -EFAULT;
224
225	request = compat_alloc_user_space(sizeof(*request));
226	if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
227	    || __put_user(req32.idx, &request->idx)
228	    || __put_user(req32.discard, &request->discard)
229	    || __put_user(req32.nr_states, &request->nr_states)
230	    || __put_user((void __user *)(unsigned long)req32.state,
231			  &request->state)
232	    || __put_user(req32.nr_prims, &request->nr_prims)
233	    || __put_user((void __user *)(unsigned long)req32.prim,
234			  &request->prim))
235		return -EFAULT;
236
237	return drm_ioctl(file, DRM_IOCTL_RADEON_VERTEX2, (unsigned long)request);
238}
239
240typedef struct drm_radeon_cmd_buffer32 {
241	int bufsz;
242	u32 buf;
243	int nbox;
244	u32 boxes;
245} drm_radeon_cmd_buffer32_t;
246
247static int compat_radeon_cp_cmdbuf(struct file *file, unsigned int cmd,
248				   unsigned long arg)
249{
250	drm_radeon_cmd_buffer32_t req32;
251	drm_radeon_cmd_buffer_t __user *request;
252
253	if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
254		return -EFAULT;
255
256	request = compat_alloc_user_space(sizeof(*request));
257	if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
258	    || __put_user(req32.bufsz, &request->bufsz)
259	    || __put_user((void __user *)(unsigned long)req32.buf,
260			  &request->buf)
261	    || __put_user(req32.nbox, &request->nbox)
262	    || __put_user((void __user *)(unsigned long)req32.boxes,
263			  &request->boxes))
264		return -EFAULT;
265
266	return drm_ioctl(file, DRM_IOCTL_RADEON_CMDBUF, (unsigned long)request);
267}
268
269typedef struct drm_radeon_getparam32 {
270	int param;
271	u32 value;
272} drm_radeon_getparam32_t;
273
274static int compat_radeon_cp_getparam(struct file *file, unsigned int cmd,
275				     unsigned long arg)
276{
277	drm_radeon_getparam32_t req32;
278	drm_radeon_getparam_t __user *request;
279
280	if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
281		return -EFAULT;
282
283	request = compat_alloc_user_space(sizeof(*request));
284	if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
285	    || __put_user(req32.param, &request->param)
286	    || __put_user((void __user *)(unsigned long)req32.value,
287			  &request->value))
288		return -EFAULT;
289
290	return drm_ioctl(file, DRM_IOCTL_RADEON_GETPARAM, (unsigned long)request);
291}
292
293typedef struct drm_radeon_mem_alloc32 {
294	int region;
295	int alignment;
296	int size;
297	u32 region_offset;	/* offset from start of fb or GART */
298} drm_radeon_mem_alloc32_t;
299
300static int compat_radeon_mem_alloc(struct file *file, unsigned int cmd,
301				   unsigned long arg)
302{
303	drm_radeon_mem_alloc32_t req32;
304	drm_radeon_mem_alloc_t __user *request;
305
306	if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
307		return -EFAULT;
308
309	request = compat_alloc_user_space(sizeof(*request));
310	if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
311	    || __put_user(req32.region, &request->region)
312	    || __put_user(req32.alignment, &request->alignment)
313	    || __put_user(req32.size, &request->size)
314	    || __put_user((int __user *)(unsigned long)req32.region_offset,
315			  &request->region_offset))
316		return -EFAULT;
317
318	return drm_ioctl(file, DRM_IOCTL_RADEON_ALLOC, (unsigned long)request);
319}
320
321typedef struct drm_radeon_irq_emit32 {
322	u32 irq_seq;
323} drm_radeon_irq_emit32_t;
324
325static int compat_radeon_irq_emit(struct file *file, unsigned int cmd,
326				  unsigned long arg)
327{
328	drm_radeon_irq_emit32_t req32;
329	drm_radeon_irq_emit_t __user *request;
330
331	if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
332		return -EFAULT;
333
334	request = compat_alloc_user_space(sizeof(*request));
335	if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
336	    || __put_user((int __user *)(unsigned long)req32.irq_seq,
337			  &request->irq_seq))
338		return -EFAULT;
339
340	return drm_ioctl(file, DRM_IOCTL_RADEON_IRQ_EMIT, (unsigned long)request);
341}
342
343/* The two 64-bit arches where alignof(u64)==4 in 32-bit code */
344#if defined (CONFIG_X86_64) || defined(CONFIG_IA64)
345typedef struct drm_radeon_setparam32 {
346	int param;
347	u64 value;
348} __attribute__((packed)) drm_radeon_setparam32_t;
349
350static int compat_radeon_cp_setparam(struct file *file, unsigned int cmd,
351				     unsigned long arg)
352{
353	drm_radeon_setparam32_t req32;
354	drm_radeon_setparam_t __user *request;
355
356	if (copy_from_user(&req32, (void __user *) arg, sizeof(req32)))
357		return -EFAULT;
358
359	request = compat_alloc_user_space(sizeof(*request));
360	if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
361	    || __put_user(req32.param, &request->param)
362	    || __put_user((void __user *)(unsigned long)req32.value,
363			  &request->value))
364		return -EFAULT;
365
366	return drm_ioctl(file, DRM_IOCTL_RADEON_SETPARAM, (unsigned long) request);
367}
368#else
369#define compat_radeon_cp_setparam NULL
370#endif /* X86_64 || IA64 */
371
372drm_ioctl_compat_t *radeon_compat_ioctls[] = {
373	[DRM_RADEON_CP_INIT] = compat_radeon_cp_init,
374	[DRM_RADEON_CLEAR] = compat_radeon_cp_clear,
375	[DRM_RADEON_STIPPLE] = compat_radeon_cp_stipple,
376	[DRM_RADEON_TEXTURE] = compat_radeon_cp_texture,
377	[DRM_RADEON_VERTEX2] = compat_radeon_cp_vertex2,
378	[DRM_RADEON_CMDBUF] = compat_radeon_cp_cmdbuf,
379	[DRM_RADEON_GETPARAM] = compat_radeon_cp_getparam,
380	[DRM_RADEON_SETPARAM] = compat_radeon_cp_setparam,
381	[DRM_RADEON_ALLOC] = compat_radeon_mem_alloc,
382	[DRM_RADEON_IRQ_EMIT] = compat_radeon_irq_emit,
383};
384
385/**
386 * Called whenever a 32-bit process running under a 64-bit kernel
387 * performs an ioctl on /dev/dri/card<n>.
388 *
389 * \param filp file pointer.
390 * \param cmd command.
391 * \param arg user argument.
392 * \return zero on success or negative number on failure.
393 */
394long radeon_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
395{
396	unsigned int nr = DRM_IOCTL_NR(cmd);
397	drm_ioctl_compat_t *fn = NULL;
398	int ret;
399
400	if (nr < DRM_COMMAND_BASE)
401		return drm_compat_ioctl(filp, cmd, arg);
402
403	if (nr < DRM_COMMAND_BASE + DRM_ARRAY_SIZE(radeon_compat_ioctls))
404		fn = radeon_compat_ioctls[nr - DRM_COMMAND_BASE];
405
406	if (fn != NULL)
407		ret = (*fn) (filp, cmd, arg);
408	else
409		ret = drm_ioctl(filp, cmd, arg);
410
411	return ret;
412}
413
414long radeon_kms_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
415{
416	unsigned int nr = DRM_IOCTL_NR(cmd);
417	int ret;
418
419	if (nr < DRM_COMMAND_BASE)
420		return drm_compat_ioctl(filp, cmd, arg);
421
422	ret = drm_ioctl(filp, cmd, arg);
423
424	return ret;
425}