Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Char device for device raw access |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 3 | * |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 4 | * Copyright (C) 2005-2007 Kristian Hoegsberg <krh@bitplanet.net> |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software Foundation, |
| 18 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 19 | */ |
| 20 | |
| 21 | #include <linux/module.h> |
| 22 | #include <linux/kernel.h> |
| 23 | #include <linux/wait.h> |
| 24 | #include <linux/errno.h> |
| 25 | #include <linux/device.h> |
| 26 | #include <linux/vmalloc.h> |
Stefan Richter | d67cfb9 | 2008-10-05 10:37:11 +0200 | [diff] [blame] | 27 | #include <linux/mutex.h> |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 28 | #include <linux/poll.h> |
Stefan Richter | a64408b | 2007-09-29 10:41:58 +0200 | [diff] [blame] | 29 | #include <linux/preempt.h> |
| 30 | #include <linux/time.h> |
Jay Fenlason | cf417e54 | 2008-10-03 11:19:09 -0400 | [diff] [blame] | 31 | #include <linux/spinlock.h> |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 32 | #include <linux/delay.h> |
| 33 | #include <linux/mm.h> |
Kristian Høgsberg | a3aca3d | 2007-03-07 12:12:44 -0500 | [diff] [blame] | 34 | #include <linux/idr.h> |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 35 | #include <linux/compat.h> |
Kristian Høgsberg | 9640d3d | 2007-04-30 15:03:15 -0400 | [diff] [blame] | 36 | #include <linux/firewire-cdev.h> |
Stefan Richter | a64408b | 2007-09-29 10:41:58 +0200 | [diff] [blame] | 37 | #include <asm/system.h> |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 38 | #include <asm/uaccess.h> |
| 39 | #include "fw-transaction.h" |
| 40 | #include "fw-topology.h" |
| 41 | #include "fw-device.h" |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 42 | |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 43 | struct client; |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame^] | 44 | struct client_resource; |
| 45 | typedef void (*client_resource_release_fn_t)(struct client *, |
| 46 | struct client_resource *); |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 47 | struct client_resource { |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame^] | 48 | client_resource_release_fn_t release; |
| 49 | int handle; |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 50 | }; |
| 51 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 52 | /* |
| 53 | * dequeue_event() just kfree()'s the event, so the event has to be |
| 54 | * the first field in the struct. |
| 55 | */ |
| 56 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 57 | struct event { |
| 58 | struct { void *data; size_t size; } v[2]; |
| 59 | struct list_head link; |
| 60 | }; |
| 61 | |
Kristian Høgsberg | 97bd9ef | 2007-03-07 12:12:41 -0500 | [diff] [blame] | 62 | struct bus_reset { |
| 63 | struct event event; |
| 64 | struct fw_cdev_event_bus_reset reset; |
| 65 | }; |
| 66 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 67 | struct response { |
| 68 | struct event event; |
| 69 | struct fw_transaction transaction; |
| 70 | struct client *client; |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 71 | struct client_resource resource; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 72 | struct fw_cdev_event_response response; |
| 73 | }; |
| 74 | |
| 75 | struct iso_interrupt { |
| 76 | struct event event; |
| 77 | struct fw_cdev_event_iso_interrupt interrupt; |
| 78 | }; |
| 79 | |
| 80 | struct client { |
Kristian Høgsberg | 344bbc4 | 2007-03-07 12:12:43 -0500 | [diff] [blame] | 81 | u32 version; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 82 | struct fw_device *device; |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame^] | 83 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 84 | spinlock_t lock; |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame^] | 85 | bool in_shutdown; |
| 86 | struct idr resource_idr; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 87 | struct list_head event_list; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 88 | wait_queue_head_t wait; |
Kristian Høgsberg | da8ecff | 2007-03-27 01:43:39 -0400 | [diff] [blame] | 89 | u64 bus_reset_closure; |
Kristian Høgsberg | 9aad812 | 2007-02-16 17:34:38 -0500 | [diff] [blame] | 90 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 91 | struct fw_iso_context *iso_context; |
Kristian Høgsberg | abaa574 | 2007-04-30 15:03:14 -0400 | [diff] [blame] | 92 | u64 iso_closure; |
Kristian Høgsberg | 9aad812 | 2007-02-16 17:34:38 -0500 | [diff] [blame] | 93 | struct fw_iso_buffer buffer; |
| 94 | unsigned long vm_start; |
Kristian Høgsberg | 97bd9ef | 2007-03-07 12:12:41 -0500 | [diff] [blame] | 95 | |
| 96 | struct list_head link; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 97 | }; |
| 98 | |
| 99 | static inline void __user * |
| 100 | u64_to_uptr(__u64 value) |
| 101 | { |
| 102 | return (void __user *)(unsigned long)value; |
| 103 | } |
| 104 | |
| 105 | static inline __u64 |
| 106 | uptr_to_u64(void __user *ptr) |
| 107 | { |
| 108 | return (__u64)(unsigned long)ptr; |
| 109 | } |
| 110 | |
| 111 | static int fw_device_op_open(struct inode *inode, struct file *file) |
| 112 | { |
| 113 | struct fw_device *device; |
| 114 | struct client *client; |
| 115 | |
Stefan Richter | 96b1906 | 2008-02-02 15:01:09 +0100 | [diff] [blame] | 116 | device = fw_device_get_by_devt(inode->i_rdev); |
Kristian Høgsberg | a3aca3d | 2007-03-07 12:12:44 -0500 | [diff] [blame] | 117 | if (device == NULL) |
| 118 | return -ENODEV; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 119 | |
Jay Fenlason | 551f4cb | 2008-05-16 11:15:23 -0400 | [diff] [blame] | 120 | if (fw_device_is_shutdown(device)) { |
| 121 | fw_device_put(device); |
| 122 | return -ENODEV; |
| 123 | } |
| 124 | |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 125 | client = kzalloc(sizeof(*client), GFP_KERNEL); |
Stefan Richter | 96b1906 | 2008-02-02 15:01:09 +0100 | [diff] [blame] | 126 | if (client == NULL) { |
| 127 | fw_device_put(device); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 128 | return -ENOMEM; |
Stefan Richter | 96b1906 | 2008-02-02 15:01:09 +0100 | [diff] [blame] | 129 | } |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 130 | |
Stefan Richter | 96b1906 | 2008-02-02 15:01:09 +0100 | [diff] [blame] | 131 | client->device = device; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 132 | spin_lock_init(&client->lock); |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame^] | 133 | idr_init(&client->resource_idr); |
| 134 | INIT_LIST_HEAD(&client->event_list); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 135 | init_waitqueue_head(&client->wait); |
| 136 | |
| 137 | file->private_data = client; |
| 138 | |
Stefan Richter | d67cfb9 | 2008-10-05 10:37:11 +0200 | [diff] [blame] | 139 | mutex_lock(&device->client_list_mutex); |
Kristian Høgsberg | 97bd9ef | 2007-03-07 12:12:41 -0500 | [diff] [blame] | 140 | list_add_tail(&client->link, &device->client_list); |
Stefan Richter | d67cfb9 | 2008-10-05 10:37:11 +0200 | [diff] [blame] | 141 | mutex_unlock(&device->client_list_mutex); |
Kristian Høgsberg | 97bd9ef | 2007-03-07 12:12:41 -0500 | [diff] [blame] | 142 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 143 | return 0; |
| 144 | } |
| 145 | |
| 146 | static void queue_event(struct client *client, struct event *event, |
| 147 | void *data0, size_t size0, void *data1, size_t size1) |
| 148 | { |
| 149 | unsigned long flags; |
| 150 | |
| 151 | event->v[0].data = data0; |
| 152 | event->v[0].size = size0; |
| 153 | event->v[1].data = data1; |
| 154 | event->v[1].size = size1; |
| 155 | |
| 156 | spin_lock_irqsave(&client->lock, flags); |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame^] | 157 | if (client->in_shutdown) |
| 158 | kfree(event); |
| 159 | else |
| 160 | list_add_tail(&event->link, &client->event_list); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 161 | spin_unlock_irqrestore(&client->lock, flags); |
Jay Fenlason | 83431cb | 2007-10-08 17:00:29 -0400 | [diff] [blame] | 162 | |
| 163 | wake_up_interruptible(&client->wait); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 164 | } |
| 165 | |
Kristian Høgsberg | 2603bf2 | 2007-03-07 12:12:48 -0500 | [diff] [blame] | 166 | static int |
| 167 | dequeue_event(struct client *client, char __user *buffer, size_t count) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 168 | { |
| 169 | unsigned long flags; |
| 170 | struct event *event; |
| 171 | size_t size, total; |
Kristian Høgsberg | 2603bf2 | 2007-03-07 12:12:48 -0500 | [diff] [blame] | 172 | int i, retval; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 173 | |
Kristian Høgsberg | 2603bf2 | 2007-03-07 12:12:48 -0500 | [diff] [blame] | 174 | retval = wait_event_interruptible(client->wait, |
| 175 | !list_empty(&client->event_list) || |
| 176 | fw_device_is_shutdown(client->device)); |
| 177 | if (retval < 0) |
| 178 | return retval; |
| 179 | |
| 180 | if (list_empty(&client->event_list) && |
| 181 | fw_device_is_shutdown(client->device)) |
| 182 | return -ENODEV; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 183 | |
| 184 | spin_lock_irqsave(&client->lock, flags); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 185 | event = container_of(client->event_list.next, struct event, link); |
| 186 | list_del(&event->link); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 187 | spin_unlock_irqrestore(&client->lock, flags); |
| 188 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 189 | total = 0; |
| 190 | for (i = 0; i < ARRAY_SIZE(event->v) && total < count; i++) { |
| 191 | size = min(event->v[i].size, count - total); |
Kristian Høgsberg | 2603bf2 | 2007-03-07 12:12:48 -0500 | [diff] [blame] | 192 | if (copy_to_user(buffer + total, event->v[i].data, size)) { |
| 193 | retval = -EFAULT; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 194 | goto out; |
Kristian Høgsberg | 2603bf2 | 2007-03-07 12:12:48 -0500 | [diff] [blame] | 195 | } |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 196 | total += size; |
| 197 | } |
| 198 | retval = total; |
| 199 | |
| 200 | out: |
| 201 | kfree(event); |
| 202 | |
| 203 | return retval; |
| 204 | } |
| 205 | |
| 206 | static ssize_t |
| 207 | fw_device_op_read(struct file *file, |
| 208 | char __user *buffer, size_t count, loff_t *offset) |
| 209 | { |
| 210 | struct client *client = file->private_data; |
| 211 | |
| 212 | return dequeue_event(client, buffer, count); |
| 213 | } |
| 214 | |
Kristian Høgsberg | 97bd9ef | 2007-03-07 12:12:41 -0500 | [diff] [blame] | 215 | static void |
Kristian Høgsberg | 344bbc4 | 2007-03-07 12:12:43 -0500 | [diff] [blame] | 216 | fill_bus_reset_event(struct fw_cdev_event_bus_reset *event, |
Kristian Høgsberg | da8ecff | 2007-03-27 01:43:39 -0400 | [diff] [blame] | 217 | struct client *client) |
Kristian Høgsberg | 344bbc4 | 2007-03-07 12:12:43 -0500 | [diff] [blame] | 218 | { |
Kristian Høgsberg | da8ecff | 2007-03-27 01:43:39 -0400 | [diff] [blame] | 219 | struct fw_card *card = client->device->card; |
Jay Fenlason | cf417e54 | 2008-10-03 11:19:09 -0400 | [diff] [blame] | 220 | unsigned long flags; |
| 221 | |
| 222 | spin_lock_irqsave(&card->lock, flags); |
Kristian Høgsberg | 344bbc4 | 2007-03-07 12:12:43 -0500 | [diff] [blame] | 223 | |
Kristian Høgsberg | da8ecff | 2007-03-27 01:43:39 -0400 | [diff] [blame] | 224 | event->closure = client->bus_reset_closure; |
Kristian Høgsberg | 344bbc4 | 2007-03-07 12:12:43 -0500 | [diff] [blame] | 225 | event->type = FW_CDEV_EVENT_BUS_RESET; |
Stefan Richter | cf5a56a | 2008-01-24 01:53:51 +0100 | [diff] [blame] | 226 | event->generation = client->device->generation; |
Kristian Høgsberg | da8ecff | 2007-03-27 01:43:39 -0400 | [diff] [blame] | 227 | event->node_id = client->device->node_id; |
Kristian Høgsberg | 344bbc4 | 2007-03-07 12:12:43 -0500 | [diff] [blame] | 228 | event->local_node_id = card->local_node->node_id; |
| 229 | event->bm_node_id = 0; /* FIXME: We don't track the BM. */ |
| 230 | event->irm_node_id = card->irm_node->node_id; |
| 231 | event->root_node_id = card->root_node->node_id; |
Jay Fenlason | cf417e54 | 2008-10-03 11:19:09 -0400 | [diff] [blame] | 232 | |
| 233 | spin_unlock_irqrestore(&card->lock, flags); |
Kristian Høgsberg | 344bbc4 | 2007-03-07 12:12:43 -0500 | [diff] [blame] | 234 | } |
| 235 | |
| 236 | static void |
Kristian Høgsberg | 2603bf2 | 2007-03-07 12:12:48 -0500 | [diff] [blame] | 237 | for_each_client(struct fw_device *device, |
| 238 | void (*callback)(struct client *client)) |
| 239 | { |
Kristian Høgsberg | 2603bf2 | 2007-03-07 12:12:48 -0500 | [diff] [blame] | 240 | struct client *c; |
Kristian Høgsberg | 2603bf2 | 2007-03-07 12:12:48 -0500 | [diff] [blame] | 241 | |
Stefan Richter | d67cfb9 | 2008-10-05 10:37:11 +0200 | [diff] [blame] | 242 | mutex_lock(&device->client_list_mutex); |
Kristian Høgsberg | 2603bf2 | 2007-03-07 12:12:48 -0500 | [diff] [blame] | 243 | list_for_each_entry(c, &device->client_list, link) |
| 244 | callback(c); |
Stefan Richter | d67cfb9 | 2008-10-05 10:37:11 +0200 | [diff] [blame] | 245 | mutex_unlock(&device->client_list_mutex); |
Kristian Høgsberg | 2603bf2 | 2007-03-07 12:12:48 -0500 | [diff] [blame] | 246 | } |
| 247 | |
| 248 | static void |
Kristian Høgsberg | 97bd9ef | 2007-03-07 12:12:41 -0500 | [diff] [blame] | 249 | queue_bus_reset_event(struct client *client) |
| 250 | { |
| 251 | struct bus_reset *bus_reset; |
Kristian Høgsberg | 97bd9ef | 2007-03-07 12:12:41 -0500 | [diff] [blame] | 252 | |
Stefan Richter | d67cfb9 | 2008-10-05 10:37:11 +0200 | [diff] [blame] | 253 | bus_reset = kzalloc(sizeof(*bus_reset), GFP_KERNEL); |
Kristian Høgsberg | 97bd9ef | 2007-03-07 12:12:41 -0500 | [diff] [blame] | 254 | if (bus_reset == NULL) { |
| 255 | fw_notify("Out of memory when allocating bus reset event\n"); |
| 256 | return; |
| 257 | } |
| 258 | |
Kristian Høgsberg | da8ecff | 2007-03-27 01:43:39 -0400 | [diff] [blame] | 259 | fill_bus_reset_event(&bus_reset->reset, client); |
Kristian Høgsberg | 97bd9ef | 2007-03-07 12:12:41 -0500 | [diff] [blame] | 260 | |
| 261 | queue_event(client, &bus_reset->event, |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 262 | &bus_reset->reset, sizeof(bus_reset->reset), NULL, 0); |
Kristian Høgsberg | 97bd9ef | 2007-03-07 12:12:41 -0500 | [diff] [blame] | 263 | } |
| 264 | |
| 265 | void fw_device_cdev_update(struct fw_device *device) |
| 266 | { |
Kristian Høgsberg | 2603bf2 | 2007-03-07 12:12:48 -0500 | [diff] [blame] | 267 | for_each_client(device, queue_bus_reset_event); |
| 268 | } |
Kristian Høgsberg | 97bd9ef | 2007-03-07 12:12:41 -0500 | [diff] [blame] | 269 | |
Kristian Høgsberg | 2603bf2 | 2007-03-07 12:12:48 -0500 | [diff] [blame] | 270 | static void wake_up_client(struct client *client) |
| 271 | { |
| 272 | wake_up_interruptible(&client->wait); |
| 273 | } |
Kristian Høgsberg | 97bd9ef | 2007-03-07 12:12:41 -0500 | [diff] [blame] | 274 | |
Kristian Høgsberg | 2603bf2 | 2007-03-07 12:12:48 -0500 | [diff] [blame] | 275 | void fw_device_cdev_remove(struct fw_device *device) |
| 276 | { |
| 277 | for_each_client(device, wake_up_client); |
Kristian Høgsberg | 97bd9ef | 2007-03-07 12:12:41 -0500 | [diff] [blame] | 278 | } |
| 279 | |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 280 | static int ioctl_get_info(struct client *client, void *buffer) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 281 | { |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 282 | struct fw_cdev_get_info *get_info = buffer; |
Kristian Høgsberg | 344bbc4 | 2007-03-07 12:12:43 -0500 | [diff] [blame] | 283 | struct fw_cdev_event_bus_reset bus_reset; |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 284 | unsigned long ret = 0; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 285 | |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 286 | client->version = get_info->version; |
| 287 | get_info->version = FW_CDEV_VERSION; |
Jay Fenlason | cf417e54 | 2008-10-03 11:19:09 -0400 | [diff] [blame] | 288 | get_info->card = client->device->card->index; |
Kristian Høgsberg | 344bbc4 | 2007-03-07 12:12:43 -0500 | [diff] [blame] | 289 | |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 290 | down_read(&fw_device_rwsem); |
| 291 | |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 292 | if (get_info->rom != 0) { |
| 293 | void __user *uptr = u64_to_uptr(get_info->rom); |
| 294 | size_t want = get_info->rom_length; |
Stefan Richter | d84702a | 2007-03-20 19:42:15 +0100 | [diff] [blame] | 295 | size_t have = client->device->config_rom_length * 4; |
Kristian Høgsberg | 344bbc4 | 2007-03-07 12:12:43 -0500 | [diff] [blame] | 296 | |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 297 | ret = copy_to_user(uptr, client->device->config_rom, |
| 298 | min(want, have)); |
Kristian Høgsberg | 344bbc4 | 2007-03-07 12:12:43 -0500 | [diff] [blame] | 299 | } |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 300 | get_info->rom_length = client->device->config_rom_length * 4; |
Kristian Høgsberg | 344bbc4 | 2007-03-07 12:12:43 -0500 | [diff] [blame] | 301 | |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 302 | up_read(&fw_device_rwsem); |
| 303 | |
| 304 | if (ret != 0) |
| 305 | return -EFAULT; |
| 306 | |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 307 | client->bus_reset_closure = get_info->bus_reset_closure; |
| 308 | if (get_info->bus_reset != 0) { |
| 309 | void __user *uptr = u64_to_uptr(get_info->bus_reset); |
Kristian Høgsberg | 344bbc4 | 2007-03-07 12:12:43 -0500 | [diff] [blame] | 310 | |
Kristian Høgsberg | da8ecff | 2007-03-27 01:43:39 -0400 | [diff] [blame] | 311 | fill_bus_reset_event(&bus_reset, client); |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 312 | if (copy_to_user(uptr, &bus_reset, sizeof(bus_reset))) |
Kristian Høgsberg | 344bbc4 | 2007-03-07 12:12:43 -0500 | [diff] [blame] | 313 | return -EFAULT; |
| 314 | } |
| 315 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 316 | return 0; |
| 317 | } |
| 318 | |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame^] | 319 | static int |
| 320 | add_client_resource(struct client *client, struct client_resource *resource, |
| 321 | gfp_t gfp_mask) |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 322 | { |
| 323 | unsigned long flags; |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame^] | 324 | int ret; |
| 325 | |
| 326 | retry: |
| 327 | if (idr_pre_get(&client->resource_idr, gfp_mask) == 0) |
| 328 | return -ENOMEM; |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 329 | |
| 330 | spin_lock_irqsave(&client->lock, flags); |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame^] | 331 | if (client->in_shutdown) |
| 332 | ret = -ECANCELED; |
| 333 | else |
| 334 | ret = idr_get_new(&client->resource_idr, resource, |
| 335 | &resource->handle); |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 336 | spin_unlock_irqrestore(&client->lock, flags); |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame^] | 337 | |
| 338 | if (ret == -EAGAIN) |
| 339 | goto retry; |
| 340 | |
| 341 | return ret < 0 ? ret : 0; |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 342 | } |
| 343 | |
| 344 | static int |
| 345 | release_client_resource(struct client *client, u32 handle, |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame^] | 346 | client_resource_release_fn_t release, |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 347 | struct client_resource **resource) |
| 348 | { |
| 349 | struct client_resource *r; |
| 350 | unsigned long flags; |
| 351 | |
| 352 | spin_lock_irqsave(&client->lock, flags); |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame^] | 353 | if (client->in_shutdown) |
| 354 | r = NULL; |
| 355 | else |
| 356 | r = idr_find(&client->resource_idr, handle); |
| 357 | if (r && r->release == release) |
| 358 | idr_remove(&client->resource_idr, handle); |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 359 | spin_unlock_irqrestore(&client->lock, flags); |
| 360 | |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame^] | 361 | if (!(r && r->release == release)) |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 362 | return -EINVAL; |
| 363 | |
| 364 | if (resource) |
| 365 | *resource = r; |
| 366 | else |
| 367 | r->release(client, r); |
| 368 | |
| 369 | return 0; |
| 370 | } |
| 371 | |
| 372 | static void |
| 373 | release_transaction(struct client *client, struct client_resource *resource) |
| 374 | { |
| 375 | struct response *response = |
| 376 | container_of(resource, struct response, resource); |
| 377 | |
| 378 | fw_cancel_transaction(client->device->card, &response->transaction); |
| 379 | } |
| 380 | |
| 381 | static void |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 382 | complete_transaction(struct fw_card *card, int rcode, |
| 383 | void *payload, size_t length, void *data) |
| 384 | { |
| 385 | struct response *response = data; |
| 386 | struct client *client = response->client; |
Kristian Høgsberg | 28cf6a0 | 2007-03-07 12:12:50 -0500 | [diff] [blame] | 387 | unsigned long flags; |
David Moore | 8401d92 | 2008-07-29 23:46:25 -0700 | [diff] [blame] | 388 | struct fw_cdev_event_response *r = &response->response; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 389 | |
David Moore | 8401d92 | 2008-07-29 23:46:25 -0700 | [diff] [blame] | 390 | if (length < r->length) |
| 391 | r->length = length; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 392 | if (rcode == RCODE_COMPLETE) |
David Moore | 8401d92 | 2008-07-29 23:46:25 -0700 | [diff] [blame] | 393 | memcpy(r->data, payload, r->length); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 394 | |
Kristian Høgsberg | 28cf6a0 | 2007-03-07 12:12:50 -0500 | [diff] [blame] | 395 | spin_lock_irqsave(&client->lock, flags); |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame^] | 396 | /* |
| 397 | * If called while in shutdown, the idr tree must be left untouched. |
| 398 | * The idr handle will be removed later. |
| 399 | */ |
| 400 | if (!client->in_shutdown) |
| 401 | idr_remove(&client->resource_idr, response->resource.handle); |
Kristian Høgsberg | 28cf6a0 | 2007-03-07 12:12:50 -0500 | [diff] [blame] | 402 | spin_unlock_irqrestore(&client->lock, flags); |
| 403 | |
David Moore | 8401d92 | 2008-07-29 23:46:25 -0700 | [diff] [blame] | 404 | r->type = FW_CDEV_EVENT_RESPONSE; |
| 405 | r->rcode = rcode; |
| 406 | |
| 407 | /* |
| 408 | * In the case that sizeof(*r) doesn't align with the position of the |
| 409 | * data, and the read is short, preserve an extra copy of the data |
| 410 | * to stay compatible with a pre-2.6.27 bug. Since the bug is harmless |
| 411 | * for short reads and some apps depended on it, this is both safe |
| 412 | * and prudent for compatibility. |
| 413 | */ |
| 414 | if (r->length <= sizeof(*r) - offsetof(typeof(*r), data)) |
| 415 | queue_event(client, &response->event, r, sizeof(*r), |
| 416 | r->data, r->length); |
| 417 | else |
| 418 | queue_event(client, &response->event, r, sizeof(*r) + r->length, |
| 419 | NULL, 0); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 420 | } |
| 421 | |
Jeff Garzik | 350958f | 2007-05-27 07:09:18 -0400 | [diff] [blame] | 422 | static int ioctl_send_request(struct client *client, void *buffer) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 423 | { |
| 424 | struct fw_device *device = client->device; |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 425 | struct fw_cdev_send_request *request = buffer; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 426 | struct response *response; |
Stefan Richter | 1f3125a | 2008-12-05 22:44:42 +0100 | [diff] [blame] | 427 | int ret; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 428 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 429 | /* What is the biggest size we'll accept, really? */ |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 430 | if (request->length > 4096) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 431 | return -EINVAL; |
| 432 | |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 433 | response = kmalloc(sizeof(*response) + request->length, GFP_KERNEL); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 434 | if (response == NULL) |
| 435 | return -ENOMEM; |
| 436 | |
| 437 | response->client = client; |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 438 | response->response.length = request->length; |
| 439 | response->response.closure = request->closure; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 440 | |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 441 | if (request->data && |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 442 | copy_from_user(response->response.data, |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 443 | u64_to_uptr(request->data), request->length)) { |
Stefan Richter | 1f3125a | 2008-12-05 22:44:42 +0100 | [diff] [blame] | 444 | ret = -EFAULT; |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame^] | 445 | goto failed; |
Stefan Richter | 1f3125a | 2008-12-05 22:44:42 +0100 | [diff] [blame] | 446 | } |
| 447 | |
| 448 | switch (request->tcode) { |
| 449 | case TCODE_WRITE_QUADLET_REQUEST: |
| 450 | case TCODE_WRITE_BLOCK_REQUEST: |
| 451 | case TCODE_READ_QUADLET_REQUEST: |
| 452 | case TCODE_READ_BLOCK_REQUEST: |
| 453 | case TCODE_LOCK_MASK_SWAP: |
| 454 | case TCODE_LOCK_COMPARE_SWAP: |
| 455 | case TCODE_LOCK_FETCH_ADD: |
| 456 | case TCODE_LOCK_LITTLE_ADD: |
| 457 | case TCODE_LOCK_BOUNDED_ADD: |
| 458 | case TCODE_LOCK_WRAP_ADD: |
| 459 | case TCODE_LOCK_VENDOR_DEPENDENT: |
| 460 | break; |
| 461 | default: |
| 462 | ret = -EINVAL; |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame^] | 463 | goto failed; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 464 | } |
| 465 | |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 466 | response->resource.release = release_transaction; |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame^] | 467 | ret = add_client_resource(client, &response->resource, GFP_KERNEL); |
| 468 | if (ret < 0) |
| 469 | goto failed; |
Kristian Høgsberg | 28cf6a0 | 2007-03-07 12:12:50 -0500 | [diff] [blame] | 470 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 471 | fw_send_request(device->card, &response->transaction, |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 472 | request->tcode & 0x1f, |
Stefan Richter | 907293d | 2007-01-23 21:11:43 +0100 | [diff] [blame] | 473 | device->node->node_id, |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 474 | request->generation, |
Stefan Richter | f139749 | 2007-06-10 21:31:36 +0200 | [diff] [blame] | 475 | device->max_speed, |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 476 | request->offset, |
| 477 | response->response.data, request->length, |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 478 | complete_transaction, response); |
| 479 | |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 480 | if (request->data) |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 481 | return sizeof(request) + request->length; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 482 | else |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 483 | return sizeof(request); |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame^] | 484 | failed: |
Stefan Richter | 1f3125a | 2008-12-05 22:44:42 +0100 | [diff] [blame] | 485 | kfree(response); |
| 486 | |
| 487 | return ret; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 488 | } |
| 489 | |
| 490 | struct address_handler { |
| 491 | struct fw_address_handler handler; |
| 492 | __u64 closure; |
| 493 | struct client *client; |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 494 | struct client_resource resource; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 495 | }; |
| 496 | |
| 497 | struct request { |
| 498 | struct fw_request *request; |
| 499 | void *data; |
| 500 | size_t length; |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 501 | struct client_resource resource; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 502 | }; |
| 503 | |
| 504 | struct request_event { |
| 505 | struct event event; |
| 506 | struct fw_cdev_event_request request; |
| 507 | }; |
| 508 | |
| 509 | static void |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 510 | release_request(struct client *client, struct client_resource *resource) |
| 511 | { |
| 512 | struct request *request = |
| 513 | container_of(resource, struct request, resource); |
| 514 | |
| 515 | fw_send_response(client->device->card, request->request, |
| 516 | RCODE_CONFLICT_ERROR); |
| 517 | kfree(request); |
| 518 | } |
| 519 | |
| 520 | static void |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 521 | handle_request(struct fw_card *card, struct fw_request *r, |
| 522 | int tcode, int destination, int source, |
| 523 | int generation, int speed, |
| 524 | unsigned long long offset, |
| 525 | void *payload, size_t length, void *callback_data) |
| 526 | { |
| 527 | struct address_handler *handler = callback_data; |
| 528 | struct request *request; |
| 529 | struct request_event *e; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 530 | struct client *client = handler->client; |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame^] | 531 | int ret; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 532 | |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 533 | request = kmalloc(sizeof(*request), GFP_ATOMIC); |
| 534 | e = kmalloc(sizeof(*e), GFP_ATOMIC); |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame^] | 535 | if (request == NULL || e == NULL) |
| 536 | goto failed; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 537 | |
| 538 | request->request = r; |
| 539 | request->data = payload; |
| 540 | request->length = length; |
| 541 | |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 542 | request->resource.release = release_request; |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame^] | 543 | ret = add_client_resource(client, &request->resource, GFP_ATOMIC); |
| 544 | if (ret < 0) |
| 545 | goto failed; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 546 | |
| 547 | e->request.type = FW_CDEV_EVENT_REQUEST; |
| 548 | e->request.tcode = tcode; |
| 549 | e->request.offset = offset; |
| 550 | e->request.length = length; |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 551 | e->request.handle = request->resource.handle; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 552 | e->request.closure = handler->closure; |
| 553 | |
| 554 | queue_event(client, &e->event, |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 555 | &e->request, sizeof(e->request), payload, length); |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame^] | 556 | return; |
| 557 | |
| 558 | failed: |
| 559 | kfree(request); |
| 560 | kfree(e); |
| 561 | fw_send_response(card, r, RCODE_CONFLICT_ERROR); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 562 | } |
| 563 | |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 564 | static void |
| 565 | release_address_handler(struct client *client, |
| 566 | struct client_resource *resource) |
| 567 | { |
| 568 | struct address_handler *handler = |
| 569 | container_of(resource, struct address_handler, resource); |
| 570 | |
| 571 | fw_core_remove_address_handler(&handler->handler); |
| 572 | kfree(handler); |
| 573 | } |
| 574 | |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 575 | static int ioctl_allocate(struct client *client, void *buffer) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 576 | { |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 577 | struct fw_cdev_allocate *request = buffer; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 578 | struct address_handler *handler; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 579 | struct fw_address_region region; |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame^] | 580 | int ret; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 581 | |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 582 | handler = kmalloc(sizeof(*handler), GFP_KERNEL); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 583 | if (handler == NULL) |
| 584 | return -ENOMEM; |
| 585 | |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 586 | region.start = request->offset; |
| 587 | region.end = request->offset + request->length; |
| 588 | handler->handler.length = request->length; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 589 | handler->handler.address_callback = handle_request; |
| 590 | handler->handler.callback_data = handler; |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 591 | handler->closure = request->closure; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 592 | handler->client = client; |
| 593 | |
| 594 | if (fw_core_add_address_handler(&handler->handler, ®ion) < 0) { |
| 595 | kfree(handler); |
| 596 | return -EBUSY; |
| 597 | } |
| 598 | |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 599 | handler->resource.release = release_address_handler; |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame^] | 600 | ret = add_client_resource(client, &handler->resource, GFP_KERNEL); |
| 601 | if (ret < 0) { |
| 602 | release_address_handler(client, &handler->resource); |
| 603 | return ret; |
| 604 | } |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 605 | request->handle = handler->resource.handle; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 606 | |
| 607 | return 0; |
| 608 | } |
| 609 | |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 610 | static int ioctl_deallocate(struct client *client, void *buffer) |
Kristian Høgsberg | 9472316 | 2007-03-14 17:34:55 -0400 | [diff] [blame] | 611 | { |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 612 | struct fw_cdev_deallocate *request = buffer; |
Kristian Høgsberg | 9472316 | 2007-03-14 17:34:55 -0400 | [diff] [blame] | 613 | |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame^] | 614 | return release_client_resource(client, request->handle, |
| 615 | release_address_handler, NULL); |
Kristian Høgsberg | 9472316 | 2007-03-14 17:34:55 -0400 | [diff] [blame] | 616 | } |
| 617 | |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 618 | static int ioctl_send_response(struct client *client, void *buffer) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 619 | { |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 620 | struct fw_cdev_send_response *request = buffer; |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 621 | struct client_resource *resource; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 622 | struct request *r; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 623 | |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame^] | 624 | if (release_client_resource(client, request->handle, |
| 625 | release_request, &resource) < 0) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 626 | return -EINVAL; |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame^] | 627 | |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 628 | r = container_of(resource, struct request, resource); |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 629 | if (request->length < r->length) |
| 630 | r->length = request->length; |
| 631 | if (copy_from_user(r->data, u64_to_uptr(request->data), r->length)) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 632 | return -EFAULT; |
| 633 | |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 634 | fw_send_response(client->device->card, r->request, request->rcode); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 635 | kfree(r); |
| 636 | |
| 637 | return 0; |
| 638 | } |
| 639 | |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 640 | static int ioctl_initiate_bus_reset(struct client *client, void *buffer) |
Kristian Høgsberg | 5371842 | 2007-03-07 12:12:42 -0500 | [diff] [blame] | 641 | { |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 642 | struct fw_cdev_initiate_bus_reset *request = buffer; |
Kristian Høgsberg | 5371842 | 2007-03-07 12:12:42 -0500 | [diff] [blame] | 643 | int short_reset; |
| 644 | |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 645 | short_reset = (request->type == FW_CDEV_SHORT_RESET); |
Kristian Høgsberg | 5371842 | 2007-03-07 12:12:42 -0500 | [diff] [blame] | 646 | |
| 647 | return fw_core_initiate_bus_reset(client->device->card, short_reset); |
| 648 | } |
| 649 | |
Kristian Høgsberg | 66dea3e | 2007-03-28 21:26:42 +0200 | [diff] [blame] | 650 | struct descriptor { |
| 651 | struct fw_descriptor d; |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 652 | struct client_resource resource; |
Kristian Høgsberg | 66dea3e | 2007-03-28 21:26:42 +0200 | [diff] [blame] | 653 | u32 data[0]; |
| 654 | }; |
| 655 | |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 656 | static void release_descriptor(struct client *client, |
| 657 | struct client_resource *resource) |
| 658 | { |
| 659 | struct descriptor *descriptor = |
| 660 | container_of(resource, struct descriptor, resource); |
| 661 | |
| 662 | fw_core_remove_descriptor(&descriptor->d); |
| 663 | kfree(descriptor); |
| 664 | } |
| 665 | |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 666 | static int ioctl_add_descriptor(struct client *client, void *buffer) |
Kristian Høgsberg | 66dea3e | 2007-03-28 21:26:42 +0200 | [diff] [blame] | 667 | { |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 668 | struct fw_cdev_add_descriptor *request = buffer; |
Kristian Høgsberg | 66dea3e | 2007-03-28 21:26:42 +0200 | [diff] [blame] | 669 | struct descriptor *descriptor; |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame^] | 670 | int ret; |
Kristian Høgsberg | 66dea3e | 2007-03-28 21:26:42 +0200 | [diff] [blame] | 671 | |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 672 | if (request->length > 256) |
Kristian Høgsberg | 66dea3e | 2007-03-28 21:26:42 +0200 | [diff] [blame] | 673 | return -EINVAL; |
| 674 | |
| 675 | descriptor = |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 676 | kmalloc(sizeof(*descriptor) + request->length * 4, GFP_KERNEL); |
Kristian Høgsberg | 66dea3e | 2007-03-28 21:26:42 +0200 | [diff] [blame] | 677 | if (descriptor == NULL) |
| 678 | return -ENOMEM; |
| 679 | |
| 680 | if (copy_from_user(descriptor->data, |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 681 | u64_to_uptr(request->data), request->length * 4)) { |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame^] | 682 | ret = -EFAULT; |
| 683 | goto failed; |
Kristian Høgsberg | 66dea3e | 2007-03-28 21:26:42 +0200 | [diff] [blame] | 684 | } |
| 685 | |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 686 | descriptor->d.length = request->length; |
| 687 | descriptor->d.immediate = request->immediate; |
| 688 | descriptor->d.key = request->key; |
Kristian Høgsberg | 66dea3e | 2007-03-28 21:26:42 +0200 | [diff] [blame] | 689 | descriptor->d.data = descriptor->data; |
| 690 | |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame^] | 691 | ret = fw_core_add_descriptor(&descriptor->d); |
| 692 | if (ret < 0) |
| 693 | goto failed; |
Kristian Høgsberg | 66dea3e | 2007-03-28 21:26:42 +0200 | [diff] [blame] | 694 | |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 695 | descriptor->resource.release = release_descriptor; |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame^] | 696 | ret = add_client_resource(client, &descriptor->resource, GFP_KERNEL); |
| 697 | if (ret < 0) { |
| 698 | fw_core_remove_descriptor(&descriptor->d); |
| 699 | goto failed; |
| 700 | } |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 701 | request->handle = descriptor->resource.handle; |
Kristian Høgsberg | 66dea3e | 2007-03-28 21:26:42 +0200 | [diff] [blame] | 702 | |
| 703 | return 0; |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame^] | 704 | failed: |
| 705 | kfree(descriptor); |
| 706 | |
| 707 | return ret; |
Kristian Høgsberg | 66dea3e | 2007-03-28 21:26:42 +0200 | [diff] [blame] | 708 | } |
| 709 | |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 710 | static int ioctl_remove_descriptor(struct client *client, void *buffer) |
Kristian Høgsberg | 66dea3e | 2007-03-28 21:26:42 +0200 | [diff] [blame] | 711 | { |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 712 | struct fw_cdev_remove_descriptor *request = buffer; |
Kristian Høgsberg | 66dea3e | 2007-03-28 21:26:42 +0200 | [diff] [blame] | 713 | |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame^] | 714 | return release_client_resource(client, request->handle, |
| 715 | release_descriptor, NULL); |
Kristian Høgsberg | 66dea3e | 2007-03-28 21:26:42 +0200 | [diff] [blame] | 716 | } |
| 717 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 718 | static void |
Kristian Høgsberg | 9b32d5f | 2007-02-16 17:34:44 -0500 | [diff] [blame] | 719 | iso_callback(struct fw_iso_context *context, u32 cycle, |
| 720 | size_t header_length, void *header, void *data) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 721 | { |
| 722 | struct client *client = data; |
Stefan Richter | 930e4b7 | 2007-08-03 20:56:31 +0200 | [diff] [blame] | 723 | struct iso_interrupt *irq; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 724 | |
Stefan Richter | 930e4b7 | 2007-08-03 20:56:31 +0200 | [diff] [blame] | 725 | irq = kzalloc(sizeof(*irq) + header_length, GFP_ATOMIC); |
| 726 | if (irq == NULL) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 727 | return; |
| 728 | |
Stefan Richter | 930e4b7 | 2007-08-03 20:56:31 +0200 | [diff] [blame] | 729 | irq->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT; |
| 730 | irq->interrupt.closure = client->iso_closure; |
| 731 | irq->interrupt.cycle = cycle; |
| 732 | irq->interrupt.header_length = header_length; |
| 733 | memcpy(irq->interrupt.header, header, header_length); |
| 734 | queue_event(client, &irq->event, &irq->interrupt, |
| 735 | sizeof(irq->interrupt) + header_length, NULL, 0); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 736 | } |
| 737 | |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 738 | static int ioctl_create_iso_context(struct client *client, void *buffer) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 739 | { |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 740 | struct fw_cdev_create_iso_context *request = buffer; |
Kristian Høgsberg | 24315c5 | 2007-06-20 17:48:07 -0400 | [diff] [blame] | 741 | struct fw_iso_context *context; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 742 | |
Stefan Richter | fae6031 | 2008-02-20 21:10:06 +0100 | [diff] [blame] | 743 | /* We only support one context at this time. */ |
| 744 | if (client->iso_context != NULL) |
| 745 | return -EBUSY; |
| 746 | |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 747 | if (request->channel > 63) |
Kristian Høgsberg | 21efb3c | 2007-02-16 17:34:50 -0500 | [diff] [blame] | 748 | return -EINVAL; |
| 749 | |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 750 | switch (request->type) { |
Kristian Høgsberg | c70dc78 | 2007-03-14 17:34:53 -0400 | [diff] [blame] | 751 | case FW_ISO_CONTEXT_RECEIVE: |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 752 | if (request->header_size < 4 || (request->header_size & 3)) |
Kristian Høgsberg | c70dc78 | 2007-03-14 17:34:53 -0400 | [diff] [blame] | 753 | return -EINVAL; |
| 754 | |
| 755 | break; |
| 756 | |
| 757 | case FW_ISO_CONTEXT_TRANSMIT: |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 758 | if (request->speed > SCODE_3200) |
Kristian Høgsberg | c70dc78 | 2007-03-14 17:34:53 -0400 | [diff] [blame] | 759 | return -EINVAL; |
| 760 | |
| 761 | break; |
| 762 | |
| 763 | default: |
Kristian Høgsberg | 21efb3c | 2007-02-16 17:34:50 -0500 | [diff] [blame] | 764 | return -EINVAL; |
Kristian Høgsberg | c70dc78 | 2007-03-14 17:34:53 -0400 | [diff] [blame] | 765 | } |
| 766 | |
Kristian Høgsberg | 24315c5 | 2007-06-20 17:48:07 -0400 | [diff] [blame] | 767 | context = fw_iso_context_create(client->device->card, |
| 768 | request->type, |
| 769 | request->channel, |
| 770 | request->speed, |
| 771 | request->header_size, |
| 772 | iso_callback, client); |
| 773 | if (IS_ERR(context)) |
| 774 | return PTR_ERR(context); |
| 775 | |
Kristian Høgsberg | abaa574 | 2007-04-30 15:03:14 -0400 | [diff] [blame] | 776 | client->iso_closure = request->closure; |
Kristian Høgsberg | 24315c5 | 2007-06-20 17:48:07 -0400 | [diff] [blame] | 777 | client->iso_context = context; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 778 | |
Kristian Høgsberg | abaa574 | 2007-04-30 15:03:14 -0400 | [diff] [blame] | 779 | /* We only support one context at this time. */ |
| 780 | request->handle = 0; |
| 781 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 782 | return 0; |
| 783 | } |
| 784 | |
Kristian Høgsberg | 1ca31ae | 2007-05-31 11:16:43 -0400 | [diff] [blame] | 785 | /* Macros for decoding the iso packet control header. */ |
| 786 | #define GET_PAYLOAD_LENGTH(v) ((v) & 0xffff) |
| 787 | #define GET_INTERRUPT(v) (((v) >> 16) & 0x01) |
| 788 | #define GET_SKIP(v) (((v) >> 17) & 0x01) |
Stefan Richter | 7a10034 | 2008-09-12 18:09:55 +0200 | [diff] [blame] | 789 | #define GET_TAG(v) (((v) >> 18) & 0x03) |
| 790 | #define GET_SY(v) (((v) >> 20) & 0x0f) |
Kristian Høgsberg | 1ca31ae | 2007-05-31 11:16:43 -0400 | [diff] [blame] | 791 | #define GET_HEADER_LENGTH(v) (((v) >> 24) & 0xff) |
| 792 | |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 793 | static int ioctl_queue_iso(struct client *client, void *buffer) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 794 | { |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 795 | struct fw_cdev_queue_iso *request = buffer; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 796 | struct fw_cdev_iso_packet __user *p, *end, *next; |
Kristian Høgsberg | 9b32d5f | 2007-02-16 17:34:44 -0500 | [diff] [blame] | 797 | struct fw_iso_context *ctx = client->iso_context; |
Kristian Høgsberg | ef370ee | 2007-03-28 20:46:23 +0200 | [diff] [blame] | 798 | unsigned long payload, buffer_end, header_length; |
Kristian Høgsberg | 1ca31ae | 2007-05-31 11:16:43 -0400 | [diff] [blame] | 799 | u32 control; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 800 | int count; |
| 801 | struct { |
| 802 | struct fw_iso_packet packet; |
| 803 | u8 header[256]; |
| 804 | } u; |
| 805 | |
Kristian Høgsberg | abaa574 | 2007-04-30 15:03:14 -0400 | [diff] [blame] | 806 | if (ctx == NULL || request->handle != 0) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 807 | return -EINVAL; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 808 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 809 | /* |
| 810 | * If the user passes a non-NULL data pointer, has mmap()'ed |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 811 | * the iso buffer, and the pointer points inside the buffer, |
| 812 | * we setup the payload pointers accordingly. Otherwise we |
Kristian Høgsberg | 9aad812 | 2007-02-16 17:34:38 -0500 | [diff] [blame] | 813 | * set them both to 0, which will still let packets with |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 814 | * payload_length == 0 through. In other words, if no packets |
| 815 | * use the indirect payload, the iso buffer need not be mapped |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 816 | * and the request->data pointer is ignored. |
| 817 | */ |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 818 | |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 819 | payload = (unsigned long)request->data - client->vm_start; |
Kristian Høgsberg | ef370ee | 2007-03-28 20:46:23 +0200 | [diff] [blame] | 820 | buffer_end = client->buffer.page_count << PAGE_SHIFT; |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 821 | if (request->data == 0 || client->buffer.pages == NULL || |
Kristian Høgsberg | ef370ee | 2007-03-28 20:46:23 +0200 | [diff] [blame] | 822 | payload >= buffer_end) { |
Kristian Høgsberg | 9aad812 | 2007-02-16 17:34:38 -0500 | [diff] [blame] | 823 | payload = 0; |
Kristian Høgsberg | ef370ee | 2007-03-28 20:46:23 +0200 | [diff] [blame] | 824 | buffer_end = 0; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 825 | } |
| 826 | |
Al Viro | 1ccc914 | 2007-10-14 19:34:40 +0100 | [diff] [blame] | 827 | p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(request->packets); |
| 828 | |
| 829 | if (!access_ok(VERIFY_READ, p, request->size)) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 830 | return -EFAULT; |
| 831 | |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 832 | end = (void __user *)p + request->size; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 833 | count = 0; |
| 834 | while (p < end) { |
Kristian Høgsberg | 1ca31ae | 2007-05-31 11:16:43 -0400 | [diff] [blame] | 835 | if (get_user(control, &p->control)) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 836 | return -EFAULT; |
Kristian Høgsberg | 1ca31ae | 2007-05-31 11:16:43 -0400 | [diff] [blame] | 837 | u.packet.payload_length = GET_PAYLOAD_LENGTH(control); |
| 838 | u.packet.interrupt = GET_INTERRUPT(control); |
| 839 | u.packet.skip = GET_SKIP(control); |
| 840 | u.packet.tag = GET_TAG(control); |
| 841 | u.packet.sy = GET_SY(control); |
| 842 | u.packet.header_length = GET_HEADER_LENGTH(control); |
Kristian Høgsberg | 295e3fe | 2007-02-16 17:34:40 -0500 | [diff] [blame] | 843 | |
Kristian Høgsberg | 9b32d5f | 2007-02-16 17:34:44 -0500 | [diff] [blame] | 844 | if (ctx->type == FW_ISO_CONTEXT_TRANSMIT) { |
Kristian Høgsberg | 295e3fe | 2007-02-16 17:34:40 -0500 | [diff] [blame] | 845 | header_length = u.packet.header_length; |
| 846 | } else { |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 847 | /* |
| 848 | * We require that header_length is a multiple of |
| 849 | * the fixed header size, ctx->header_size. |
| 850 | */ |
Kristian Høgsberg | 9b32d5f | 2007-02-16 17:34:44 -0500 | [diff] [blame] | 851 | if (ctx->header_size == 0) { |
| 852 | if (u.packet.header_length > 0) |
| 853 | return -EINVAL; |
| 854 | } else if (u.packet.header_length % ctx->header_size != 0) { |
Kristian Høgsberg | 295e3fe | 2007-02-16 17:34:40 -0500 | [diff] [blame] | 855 | return -EINVAL; |
Kristian Høgsberg | 9b32d5f | 2007-02-16 17:34:44 -0500 | [diff] [blame] | 856 | } |
Kristian Høgsberg | 295e3fe | 2007-02-16 17:34:40 -0500 | [diff] [blame] | 857 | header_length = 0; |
| 858 | } |
| 859 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 860 | next = (struct fw_cdev_iso_packet __user *) |
Kristian Høgsberg | 295e3fe | 2007-02-16 17:34:40 -0500 | [diff] [blame] | 861 | &p->header[header_length / 4]; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 862 | if (next > end) |
| 863 | return -EINVAL; |
| 864 | if (__copy_from_user |
Kristian Høgsberg | 295e3fe | 2007-02-16 17:34:40 -0500 | [diff] [blame] | 865 | (u.packet.header, p->header, header_length)) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 866 | return -EFAULT; |
Kristian Høgsberg | 98b6cbe | 2007-02-16 17:34:51 -0500 | [diff] [blame] | 867 | if (u.packet.skip && ctx->type == FW_ISO_CONTEXT_TRANSMIT && |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 868 | u.packet.header_length + u.packet.payload_length > 0) |
| 869 | return -EINVAL; |
Kristian Høgsberg | ef370ee | 2007-03-28 20:46:23 +0200 | [diff] [blame] | 870 | if (payload + u.packet.payload_length > buffer_end) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 871 | return -EINVAL; |
| 872 | |
Kristian Høgsberg | 9b32d5f | 2007-02-16 17:34:44 -0500 | [diff] [blame] | 873 | if (fw_iso_context_queue(ctx, &u.packet, |
| 874 | &client->buffer, payload)) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 875 | break; |
| 876 | |
| 877 | p = next; |
| 878 | payload += u.packet.payload_length; |
| 879 | count++; |
| 880 | } |
| 881 | |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 882 | request->size -= uptr_to_u64(p) - request->packets; |
| 883 | request->packets = uptr_to_u64(p); |
| 884 | request->data = client->vm_start + payload; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 885 | |
| 886 | return count; |
| 887 | } |
| 888 | |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 889 | static int ioctl_start_iso(struct client *client, void *buffer) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 890 | { |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 891 | struct fw_cdev_start_iso *request = buffer; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 892 | |
Stefan Richter | fae6031 | 2008-02-20 21:10:06 +0100 | [diff] [blame] | 893 | if (client->iso_context == NULL || request->handle != 0) |
Kristian Høgsberg | abaa574 | 2007-04-30 15:03:14 -0400 | [diff] [blame] | 894 | return -EINVAL; |
Stefan Richter | fae6031 | 2008-02-20 21:10:06 +0100 | [diff] [blame] | 895 | |
Kristian Høgsberg | eb0306e | 2007-03-14 17:34:54 -0400 | [diff] [blame] | 896 | if (client->iso_context->type == FW_ISO_CONTEXT_RECEIVE) { |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 897 | if (request->tags == 0 || request->tags > 15) |
Kristian Høgsberg | eb0306e | 2007-03-14 17:34:54 -0400 | [diff] [blame] | 898 | return -EINVAL; |
| 899 | |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 900 | if (request->sync > 15) |
Kristian Høgsberg | eb0306e | 2007-03-14 17:34:54 -0400 | [diff] [blame] | 901 | return -EINVAL; |
| 902 | } |
| 903 | |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 904 | return fw_iso_context_start(client->iso_context, request->cycle, |
| 905 | request->sync, request->tags); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 906 | } |
| 907 | |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 908 | static int ioctl_stop_iso(struct client *client, void *buffer) |
Kristian Høgsberg | b829566 | 2007-02-16 17:34:42 -0500 | [diff] [blame] | 909 | { |
Kristian Høgsberg | abaa574 | 2007-04-30 15:03:14 -0400 | [diff] [blame] | 910 | struct fw_cdev_stop_iso *request = buffer; |
| 911 | |
Stefan Richter | fae6031 | 2008-02-20 21:10:06 +0100 | [diff] [blame] | 912 | if (client->iso_context == NULL || request->handle != 0) |
Kristian Høgsberg | abaa574 | 2007-04-30 15:03:14 -0400 | [diff] [blame] | 913 | return -EINVAL; |
| 914 | |
Kristian Høgsberg | b829566 | 2007-02-16 17:34:42 -0500 | [diff] [blame] | 915 | return fw_iso_context_stop(client->iso_context); |
| 916 | } |
| 917 | |
Stefan Richter | a64408b | 2007-09-29 10:41:58 +0200 | [diff] [blame] | 918 | static int ioctl_get_cycle_timer(struct client *client, void *buffer) |
| 919 | { |
| 920 | struct fw_cdev_get_cycle_timer *request = buffer; |
| 921 | struct fw_card *card = client->device->card; |
| 922 | unsigned long long bus_time; |
| 923 | struct timeval tv; |
| 924 | unsigned long flags; |
| 925 | |
| 926 | preempt_disable(); |
| 927 | local_irq_save(flags); |
| 928 | |
| 929 | bus_time = card->driver->get_bus_time(card); |
| 930 | do_gettimeofday(&tv); |
| 931 | |
| 932 | local_irq_restore(flags); |
| 933 | preempt_enable(); |
| 934 | |
| 935 | request->local_time = tv.tv_sec * 1000000ULL + tv.tv_usec; |
| 936 | request->cycle_timer = bus_time & 0xffffffff; |
| 937 | return 0; |
| 938 | } |
| 939 | |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 940 | static int (* const ioctl_handlers[])(struct client *client, void *buffer) = { |
| 941 | ioctl_get_info, |
| 942 | ioctl_send_request, |
| 943 | ioctl_allocate, |
| 944 | ioctl_deallocate, |
| 945 | ioctl_send_response, |
| 946 | ioctl_initiate_bus_reset, |
| 947 | ioctl_add_descriptor, |
| 948 | ioctl_remove_descriptor, |
| 949 | ioctl_create_iso_context, |
| 950 | ioctl_queue_iso, |
| 951 | ioctl_start_iso, |
| 952 | ioctl_stop_iso, |
Stefan Richter | a64408b | 2007-09-29 10:41:58 +0200 | [diff] [blame] | 953 | ioctl_get_cycle_timer, |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 954 | }; |
| 955 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 956 | static int |
| 957 | dispatch_ioctl(struct client *client, unsigned int cmd, void __user *arg) |
| 958 | { |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 959 | char buffer[256]; |
| 960 | int retval; |
| 961 | |
| 962 | if (_IOC_TYPE(cmd) != '#' || |
| 963 | _IOC_NR(cmd) >= ARRAY_SIZE(ioctl_handlers)) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 964 | return -EINVAL; |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 965 | |
| 966 | if (_IOC_DIR(cmd) & _IOC_WRITE) { |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 967 | if (_IOC_SIZE(cmd) > sizeof(buffer) || |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 968 | copy_from_user(buffer, arg, _IOC_SIZE(cmd))) |
| 969 | return -EFAULT; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 970 | } |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 971 | |
| 972 | retval = ioctl_handlers[_IOC_NR(cmd)](client, buffer); |
| 973 | if (retval < 0) |
| 974 | return retval; |
| 975 | |
| 976 | if (_IOC_DIR(cmd) & _IOC_READ) { |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 977 | if (_IOC_SIZE(cmd) > sizeof(buffer) || |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 978 | copy_to_user(arg, buffer, _IOC_SIZE(cmd))) |
| 979 | return -EFAULT; |
| 980 | } |
| 981 | |
Stefan Richter | 99692f7 | 2008-09-12 18:20:16 +0200 | [diff] [blame] | 982 | return retval; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 983 | } |
| 984 | |
| 985 | static long |
| 986 | fw_device_op_ioctl(struct file *file, |
| 987 | unsigned int cmd, unsigned long arg) |
| 988 | { |
| 989 | struct client *client = file->private_data; |
| 990 | |
Jay Fenlason | 551f4cb | 2008-05-16 11:15:23 -0400 | [diff] [blame] | 991 | if (fw_device_is_shutdown(client->device)) |
| 992 | return -ENODEV; |
| 993 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 994 | return dispatch_ioctl(client, cmd, (void __user *) arg); |
| 995 | } |
| 996 | |
| 997 | #ifdef CONFIG_COMPAT |
| 998 | static long |
| 999 | fw_device_op_compat_ioctl(struct file *file, |
| 1000 | unsigned int cmd, unsigned long arg) |
| 1001 | { |
| 1002 | struct client *client = file->private_data; |
| 1003 | |
Jay Fenlason | 551f4cb | 2008-05-16 11:15:23 -0400 | [diff] [blame] | 1004 | if (fw_device_is_shutdown(client->device)) |
| 1005 | return -ENODEV; |
| 1006 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1007 | return dispatch_ioctl(client, cmd, compat_ptr(arg)); |
| 1008 | } |
| 1009 | #endif |
| 1010 | |
| 1011 | static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma) |
| 1012 | { |
| 1013 | struct client *client = file->private_data; |
Kristian Høgsberg | 9aad812 | 2007-02-16 17:34:38 -0500 | [diff] [blame] | 1014 | enum dma_data_direction direction; |
| 1015 | unsigned long size; |
| 1016 | int page_count, retval; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1017 | |
Jay Fenlason | 551f4cb | 2008-05-16 11:15:23 -0400 | [diff] [blame] | 1018 | if (fw_device_is_shutdown(client->device)) |
| 1019 | return -ENODEV; |
| 1020 | |
Kristian Høgsberg | 9aad812 | 2007-02-16 17:34:38 -0500 | [diff] [blame] | 1021 | /* FIXME: We could support multiple buffers, but we don't. */ |
| 1022 | if (client->buffer.pages != NULL) |
| 1023 | return -EBUSY; |
| 1024 | |
| 1025 | if (!(vma->vm_flags & VM_SHARED)) |
| 1026 | return -EINVAL; |
| 1027 | |
| 1028 | if (vma->vm_start & ~PAGE_MASK) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1029 | return -EINVAL; |
| 1030 | |
| 1031 | client->vm_start = vma->vm_start; |
Kristian Høgsberg | 9aad812 | 2007-02-16 17:34:38 -0500 | [diff] [blame] | 1032 | size = vma->vm_end - vma->vm_start; |
| 1033 | page_count = size >> PAGE_SHIFT; |
| 1034 | if (size & ~PAGE_MASK) |
| 1035 | return -EINVAL; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1036 | |
Kristian Høgsberg | 9aad812 | 2007-02-16 17:34:38 -0500 | [diff] [blame] | 1037 | if (vma->vm_flags & VM_WRITE) |
| 1038 | direction = DMA_TO_DEVICE; |
| 1039 | else |
| 1040 | direction = DMA_FROM_DEVICE; |
| 1041 | |
| 1042 | retval = fw_iso_buffer_init(&client->buffer, client->device->card, |
| 1043 | page_count, direction); |
| 1044 | if (retval < 0) |
| 1045 | return retval; |
| 1046 | |
| 1047 | retval = fw_iso_buffer_map(&client->buffer, vma); |
| 1048 | if (retval < 0) |
| 1049 | fw_iso_buffer_destroy(&client->buffer, client->device->card); |
| 1050 | |
| 1051 | return retval; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1052 | } |
| 1053 | |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame^] | 1054 | static int shutdown_resource(int id, void *p, void *data) |
| 1055 | { |
| 1056 | struct client_resource *r = p; |
| 1057 | struct client *client = data; |
| 1058 | |
| 1059 | r->release(client, r); |
| 1060 | |
| 1061 | return 0; |
| 1062 | } |
| 1063 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1064 | static int fw_device_op_release(struct inode *inode, struct file *file) |
| 1065 | { |
| 1066 | struct client *client = file->private_data; |
Kristian Høgsberg | 2603bf2 | 2007-03-07 12:12:48 -0500 | [diff] [blame] | 1067 | struct event *e, *next_e; |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame^] | 1068 | unsigned long flags; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1069 | |
Stefan Richter | 97811e3 | 2008-12-14 19:19:23 +0100 | [diff] [blame] | 1070 | mutex_lock(&client->device->client_list_mutex); |
| 1071 | list_del(&client->link); |
| 1072 | mutex_unlock(&client->device->client_list_mutex); |
| 1073 | |
Kristian Høgsberg | 9aad812 | 2007-02-16 17:34:38 -0500 | [diff] [blame] | 1074 | if (client->buffer.pages) |
| 1075 | fw_iso_buffer_destroy(&client->buffer, client->device->card); |
| 1076 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1077 | if (client->iso_context) |
| 1078 | fw_iso_context_destroy(client->iso_context); |
| 1079 | |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame^] | 1080 | /* Freeze client->resource_idr and client->event_list */ |
| 1081 | spin_lock_irqsave(&client->lock, flags); |
| 1082 | client->in_shutdown = true; |
| 1083 | spin_unlock_irqrestore(&client->lock, flags); |
Kristian Høgsberg | 66dea3e | 2007-03-28 21:26:42 +0200 | [diff] [blame] | 1084 | |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame^] | 1085 | idr_for_each(&client->resource_idr, shutdown_resource, client); |
| 1086 | idr_remove_all(&client->resource_idr); |
| 1087 | idr_destroy(&client->resource_idr); |
Kristian Høgsberg | 28cf6a0 | 2007-03-07 12:12:50 -0500 | [diff] [blame] | 1088 | |
Kristian Høgsberg | 2603bf2 | 2007-03-07 12:12:48 -0500 | [diff] [blame] | 1089 | list_for_each_entry_safe(e, next_e, &client->event_list, link) |
| 1090 | kfree(e); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1091 | |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame^] | 1092 | /* |
| 1093 | * FIXME: client should be reference-counted. It's extremely unlikely |
| 1094 | * but there may still be transactions being completed at this point. |
| 1095 | */ |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1096 | fw_device_put(client->device); |
| 1097 | kfree(client); |
| 1098 | |
| 1099 | return 0; |
| 1100 | } |
| 1101 | |
| 1102 | static unsigned int fw_device_op_poll(struct file *file, poll_table * pt) |
| 1103 | { |
| 1104 | struct client *client = file->private_data; |
Kristian Høgsberg | 2603bf2 | 2007-03-07 12:12:48 -0500 | [diff] [blame] | 1105 | unsigned int mask = 0; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1106 | |
| 1107 | poll_wait(file, &client->wait, pt); |
| 1108 | |
Kristian Høgsberg | 2603bf2 | 2007-03-07 12:12:48 -0500 | [diff] [blame] | 1109 | if (fw_device_is_shutdown(client->device)) |
| 1110 | mask |= POLLHUP | POLLERR; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1111 | if (!list_empty(&client->event_list)) |
Kristian Høgsberg | 2603bf2 | 2007-03-07 12:12:48 -0500 | [diff] [blame] | 1112 | mask |= POLLIN | POLLRDNORM; |
| 1113 | |
| 1114 | return mask; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1115 | } |
| 1116 | |
Stefan Richter | 21ebcd1 | 2007-01-14 15:29:07 +0100 | [diff] [blame] | 1117 | const struct file_operations fw_device_ops = { |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1118 | .owner = THIS_MODULE, |
| 1119 | .open = fw_device_op_open, |
| 1120 | .read = fw_device_op_read, |
| 1121 | .unlocked_ioctl = fw_device_op_ioctl, |
| 1122 | .poll = fw_device_op_poll, |
| 1123 | .release = fw_device_op_release, |
| 1124 | .mmap = fw_device_op_mmap, |
| 1125 | |
| 1126 | #ifdef CONFIG_COMPAT |
Stefan Richter | 5af4e5e | 2007-01-21 20:45:32 +0100 | [diff] [blame] | 1127 | .compat_ioctl = fw_device_op_compat_ioctl, |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1128 | #endif |
| 1129 | }; |