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      1 /*-
      2  * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
      3  * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
      4  * All Rights Reserved.
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a
      7  * copy of this software and associated documentation files (the "Software"),
      8  * to deal in the Software without restriction, including without limitation
      9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
     10  * and/or sell copies of the Software, and to permit persons to whom the
     11  * Software is furnished to do so, subject to the following conditions:
     12  *
     13  * The above copyright notice and this permission notice (including the next
     14  * paragraph) shall be included in all copies or substantial portions of the
     15  * Software.
     16  *
     17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     20  * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
     21  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
     22  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     23  * OTHER DEALINGS IN THE SOFTWARE.
     24  *
     25  * Authors:
     26  *    Rickard E. (Rik) Faith <faith (at) valinux.com>
     27  *    Gareth Hughes <gareth (at) valinux.com>
     28  *
     29  */
     30 
     31 /** @file drm_ioctl.c
     32  * Varios minor DRM ioctls not applicable to other files, such as versioning
     33  * information and reporting DRM information to userland.
     34  */
     35 
     36 #include "drmP.h"
     37 
     38 /*
     39  * Beginning in revision 1.1 of the DRM interface, getunique will return
     40  * a unique in the form pci:oooo:bb:dd.f (o=domain, b=bus, d=device, f=function)
     41  * before setunique has been called.  The format for the bus-specific part of
     42  * the unique is not defined for any other bus.
     43  */
     44 int drm_getunique(struct drm_device *dev, void *data,
     45 		  struct drm_file *file_priv)
     46 {
     47 	struct drm_unique *u = data;
     48 
     49 	if (u->unique_len >= dev->unique_len) {
     50 		if (DRM_COPY_TO_USER(u->unique, dev->unique, dev->unique_len))
     51 			return EFAULT;
     52 	}
     53 	u->unique_len = dev->unique_len;
     54 
     55 	return 0;
     56 }
     57 
     58 /* Deprecated in DRM version 1.1, and will return EBUSY when setversion has
     59  * requested version 1.1 or greater.
     60  */
     61 int drm_setunique(struct drm_device *dev, void *data,
     62 		  struct drm_file *file_priv)
     63 {
     64 #if defined(__NetBSD__)
     65 	return EOPNOTSUPP;
     66 #else
     67 	struct drm_unique *u = data;
     68 	int domain, bus, slot, func, ret;
     69 	char *busid;
     70 
     71 	/* Check and copy in the submitted Bus ID */
     72 	if (!u->unique_len || u->unique_len > 1024)
     73 		return EINVAL;
     74 
     75 	busid = malloc(u->unique_len + 1, DRM_MEM_DRIVER, M_WAITOK);
     76 	if (busid == NULL)
     77 		return ENOMEM;
     78 
     79 	if (DRM_COPY_FROM_USER(busid, u->unique, u->unique_len)) {
     80 		free(busid, DRM_MEM_DRIVER);
     81 		return EFAULT;
     82 	}
     83 	busid[u->unique_len] = '\0';
     84 
     85 	/* Return error if the busid submitted doesn't match the device's actual
     86 	 * busid.
     87 	 */
     88 	ret = sscanf(busid, "PCI:%d:%d:%d", &bus, &slot, &func);
     89 	if (ret != 3) {
     90 		free(busid, DRM_MEM_DRIVER);
     91 		return EINVAL;
     92 	}
     93 	domain = bus >> 8;
     94 	bus &= 0xff;
     95 
     96 	if ((domain != dev->pci_domain) ||
     97 	    (bus != dev->pci_bus) ||
     98 	    (slot != dev->pci_slot) ||
     99 	    (func != dev->pci_func)) {
    100 		free(busid, DRM_MEM_DRIVER);
    101 		return EINVAL;
    102 	}
    103 
    104 	/* Actually set the device's busid now. */
    105 	DRM_LOCK();
    106 	if (dev->unique_len || dev->unique) {
    107 		DRM_UNLOCK();
    108 		return EBUSY;
    109 	}
    110 
    111 	dev->unique_len = u->unique_len;
    112 	dev->unique = busid;
    113 	DRM_UNLOCK();
    114 
    115 	return 0;
    116 #endif
    117 }
    118 
    119 
    120 static int
    121 drm_set_busid(struct drm_device *dev)
    122 {
    123 
    124 	DRM_LOCK();
    125 
    126 	if (dev->unique != NULL) {
    127 		DRM_UNLOCK();
    128 		return EBUSY;
    129 	}
    130 
    131 	dev->unique_len = 20;
    132 	dev->unique = malloc(dev->unique_len + 1, DRM_MEM_DRIVER, M_NOWAIT);
    133 	if (dev->unique == NULL) {
    134 		DRM_UNLOCK();
    135 		return ENOMEM;
    136 	}
    137 
    138 	snprintf(dev->unique, dev->unique_len, "pci:%04x:%02x:%02x.%1x",
    139 	    dev->pci_domain, dev->pci_bus, dev->pci_slot, dev->pci_func);
    140 
    141 	DRM_UNLOCK();
    142 
    143 	return 0;
    144 }
    145 
    146 int drm_getmap(struct drm_device *dev, void *data, struct drm_file *file_priv)
    147 {
    148 	struct drm_map     *map = data;
    149 	drm_local_map_t    *mapinlist;
    150 	int          idx;
    151 	int	     i = 0;
    152 
    153 	idx = map->offset;
    154 
    155 	DRM_LOCK();
    156 	if (idx < 0) {
    157 		DRM_UNLOCK();
    158 		return EINVAL;
    159 	}
    160 
    161 	TAILQ_FOREACH(mapinlist, &dev->maplist, link) {
    162 		if (i == idx) {
    163 			map->offset = mapinlist->offset;
    164 			map->size   = mapinlist->size;
    165 			map->type   = mapinlist->type;
    166 			map->flags  = mapinlist->flags;
    167 			map->handle = mapinlist->handle;
    168 			map->mtrr   = mapinlist->mtrr;
    169 			break;
    170 		}
    171 		i++;
    172 	}
    173 
    174 	DRM_UNLOCK();
    175 
    176  	if (mapinlist == NULL)
    177 		return EINVAL;
    178 
    179 	return 0;
    180 }
    181 
    182 int drm_getclient(struct drm_device *dev, void *data,
    183 		  struct drm_file *file_priv)
    184 {
    185 	struct drm_client *client = data;
    186 	struct drm_file *pt;
    187 	int idx;
    188 	int i = 0;
    189 
    190 	idx = client->idx;
    191 	DRM_LOCK();
    192 	TAILQ_FOREACH(pt, &dev->files, link) {
    193 		if (i == idx) {
    194 			client->auth  = pt->authenticated;
    195 			client->pid   = pt->pid;
    196 			client->uid   = pt->uid;
    197 			client->magic = pt->magic;
    198 			client->iocs  = pt->ioctl_count;
    199 			DRM_UNLOCK();
    200 			return 0;
    201 		}
    202 		i++;
    203 	}
    204 	DRM_UNLOCK();
    205 
    206 	return EINVAL;
    207 }
    208 
    209 int drm_getstats(struct drm_device *dev, void *data, struct drm_file *file_priv)
    210 {
    211 	struct drm_stats *stats = data;
    212 	int          i;
    213 
    214 	memset(stats, 0, sizeof(struct drm_stats));
    215 
    216 	DRM_LOCK();
    217 
    218 	for (i = 0; i < dev->counters; i++) {
    219 		if (dev->types[i] == _DRM_STAT_LOCK)
    220 			stats->data[i].value =
    221 			    (dev->lock.hw_lock ? dev->lock.hw_lock->lock : 0);
    222 		else
    223 			stats->data[i].value = atomic_read(&dev->counts[i]);
    224 		stats->data[i].type = dev->types[i];
    225 	}
    226 
    227 	stats->count = dev->counters;
    228 
    229 	DRM_UNLOCK();
    230 
    231 	return 0;
    232 }
    233 
    234 #define DRM_IF_MAJOR	1
    235 #define DRM_IF_MINOR	2
    236 
    237 int drm_setversion(struct drm_device *dev, void *data,
    238 		   struct drm_file *file_priv)
    239 {
    240 	struct drm_set_version *sv = data;
    241 	struct drm_set_version ver;
    242 	int if_version;
    243 
    244 	/* Save the incoming data, and set the response before continuing
    245 	 * any further.
    246 	 */
    247 	ver = *sv;
    248 	sv->drm_di_major = DRM_IF_MAJOR;
    249 	sv->drm_di_minor = DRM_IF_MINOR;
    250 	sv->drm_dd_major = dev->driver->major;
    251 	sv->drm_dd_minor = dev->driver->minor;
    252 
    253 	if (ver.drm_di_major != -1) {
    254 		if (ver.drm_di_major != DRM_IF_MAJOR ||
    255 		    ver.drm_di_minor < 0 || ver.drm_di_minor > DRM_IF_MINOR) {
    256 			return EINVAL;
    257 		}
    258 		if_version = DRM_IF_VERSION(ver.drm_di_major,
    259 		    ver.drm_dd_minor);
    260 		dev->if_version = DRM_MAX(if_version, dev->if_version);
    261 		if (ver.drm_di_minor >= 1) {
    262 			/*
    263 			 * Version 1.1 includes tying of DRM to specific device
    264 			 */
    265 			drm_set_busid(dev);
    266 		}
    267 	}
    268 
    269 	if (ver.drm_dd_major != -1) {
    270 		if (ver.drm_dd_major != dev->driver->major ||
    271 		    ver.drm_dd_minor < 0 ||
    272 		    ver.drm_dd_minor > dev->driver->minor)
    273 		{
    274 			return EINVAL;
    275 		}
    276 	}
    277 
    278 	return 0;
    279 }
    280 
    281 
    282 int drm_noop(struct drm_device *dev, void *data, struct drm_file *file_priv)
    283 {
    284 	DRM_DEBUG("\n");
    285 	return 0;
    286 }
    287