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 | |
Stefan Richter | eb5b35a | 2010-07-07 14:13:14 +0200 | [diff] [blame] | 21 | #include <linux/bug.h> |
Stefan Richter | be5bbd6 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 22 | #include <linux/compat.h> |
| 23 | #include <linux/delay.h> |
| 24 | #include <linux/device.h> |
| 25 | #include <linux/errno.h> |
Stefan Richter | 77c9a5d | 2009-06-05 16:26:18 +0200 | [diff] [blame] | 26 | #include <linux/firewire.h> |
Stefan Richter | be5bbd6 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 27 | #include <linux/firewire-cdev.h> |
| 28 | #include <linux/idr.h> |
Stefan Richter | 4a9bde9 | 2010-02-20 22:24:43 +0100 | [diff] [blame] | 29 | #include <linux/irqflags.h> |
Jay Fenlason, Stefan Richter | b1bda4c | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 30 | #include <linux/jiffies.h> |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 31 | #include <linux/kernel.h> |
Stefan Richter | fb44303 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 32 | #include <linux/kref.h> |
Stefan Richter | be5bbd6 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 33 | #include <linux/mm.h> |
| 34 | #include <linux/module.h> |
Stefan Richter | d67cfb9 | 2008-10-05 10:37:11 +0200 | [diff] [blame] | 35 | #include <linux/mutex.h> |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 36 | #include <linux/poll.h> |
Stefan Richter | ae2a976 | 2010-07-29 09:31:56 +0200 | [diff] [blame] | 37 | #include <linux/sched.h> /* required for linux/wait.h */ |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 38 | #include <linux/slab.h> |
Jay Fenlason | cf417e54 | 2008-10-03 11:19:09 -0400 | [diff] [blame] | 39 | #include <linux/spinlock.h> |
Stefan Richter | 281e203 | 2010-01-24 16:45:03 +0100 | [diff] [blame] | 40 | #include <linux/string.h> |
Stefan Richter | be5bbd6 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 41 | #include <linux/time.h> |
Stefan Richter | e034d24 | 2009-06-06 18:36:24 +0200 | [diff] [blame] | 42 | #include <linux/uaccess.h> |
Stefan Richter | be5bbd6 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 43 | #include <linux/vmalloc.h> |
| 44 | #include <linux/wait.h> |
Jay Fenlason, Stefan Richter | b1bda4c | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 45 | #include <linux/workqueue.h> |
Stefan Richter | be5bbd6 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 46 | |
Stefan Richter | a64408b | 2007-09-29 10:41:58 +0200 | [diff] [blame] | 47 | #include <asm/system.h> |
Stefan Richter | be5bbd6 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 48 | |
Stefan Richter | 77c9a5d | 2009-06-05 16:26:18 +0200 | [diff] [blame] | 49 | #include "core.h" |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 50 | |
Stefan Richter | 604f451 | 2010-06-20 22:52:55 +0200 | [diff] [blame] | 51 | /* |
| 52 | * ABI version history is documented in linux/firewire-cdev.h. |
| 53 | */ |
Clemens Ladisch | 18d6271 | 2012-03-18 19:05:29 +0100 | [diff] [blame] | 54 | #define FW_CDEV_KERNEL_VERSION 5 |
Stefan Richter | 8e2b2b4 | 2010-07-23 13:05:39 +0200 | [diff] [blame] | 55 | #define FW_CDEV_VERSION_EVENT_REQUEST2 4 |
| 56 | #define FW_CDEV_VERSION_ALLOCATE_REGION_END 4 |
Stefan Richter | 604f451 | 2010-06-20 22:52:55 +0200 | [diff] [blame] | 57 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 58 | struct client { |
Kristian Høgsberg | 344bbc4 | 2007-03-07 12:12:43 -0500 | [diff] [blame] | 59 | u32 version; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 60 | struct fw_device *device; |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame] | 61 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 62 | spinlock_t lock; |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame] | 63 | bool in_shutdown; |
| 64 | struct idr resource_idr; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 65 | struct list_head event_list; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 66 | wait_queue_head_t wait; |
Clemens Ladisch | 5a5e62d | 2011-01-10 17:28:39 +0100 | [diff] [blame] | 67 | wait_queue_head_t tx_flush_wait; |
Kristian Høgsberg | da8ecff | 2007-03-27 01:43:39 -0400 | [diff] [blame] | 68 | u64 bus_reset_closure; |
Kristian Høgsberg | 9aad812 | 2007-02-16 17:34:38 -0500 | [diff] [blame] | 69 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 70 | struct fw_iso_context *iso_context; |
Kristian Høgsberg | abaa574 | 2007-04-30 15:03:14 -0400 | [diff] [blame] | 71 | u64 iso_closure; |
Kristian Høgsberg | 9aad812 | 2007-02-16 17:34:38 -0500 | [diff] [blame] | 72 | struct fw_iso_buffer buffer; |
| 73 | unsigned long vm_start; |
Kristian Høgsberg | 97bd9ef | 2007-03-07 12:12:41 -0500 | [diff] [blame] | 74 | |
Stefan Richter | bf54e14 | 2010-07-16 22:25:51 +0200 | [diff] [blame] | 75 | struct list_head phy_receiver_link; |
| 76 | u64 phy_receiver_closure; |
| 77 | |
Kristian Høgsberg | 97bd9ef | 2007-03-07 12:12:41 -0500 | [diff] [blame] | 78 | struct list_head link; |
Stefan Richter | fb44303 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 79 | struct kref kref; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 80 | }; |
| 81 | |
Stefan Richter | fb44303 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 82 | static inline void client_get(struct client *client) |
| 83 | { |
| 84 | kref_get(&client->kref); |
| 85 | } |
| 86 | |
| 87 | static void client_release(struct kref *kref) |
| 88 | { |
| 89 | struct client *client = container_of(kref, struct client, kref); |
| 90 | |
| 91 | fw_device_put(client->device); |
| 92 | kfree(client); |
| 93 | } |
| 94 | |
| 95 | static void client_put(struct client *client) |
| 96 | { |
| 97 | kref_put(&client->kref, client_release); |
| 98 | } |
| 99 | |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 100 | struct client_resource; |
| 101 | typedef void (*client_resource_release_fn_t)(struct client *, |
| 102 | struct client_resource *); |
| 103 | struct client_resource { |
| 104 | client_resource_release_fn_t release; |
| 105 | int handle; |
| 106 | }; |
| 107 | |
| 108 | struct address_handler_resource { |
| 109 | struct client_resource resource; |
| 110 | struct fw_address_handler handler; |
| 111 | __u64 closure; |
| 112 | struct client *client; |
| 113 | }; |
| 114 | |
| 115 | struct outbound_transaction_resource { |
| 116 | struct client_resource resource; |
| 117 | struct fw_transaction transaction; |
| 118 | }; |
| 119 | |
| 120 | struct inbound_transaction_resource { |
| 121 | struct client_resource resource; |
Jay Fenlason | 08bd34c | 2010-05-18 14:02:45 -0400 | [diff] [blame] | 122 | struct fw_card *card; |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 123 | struct fw_request *request; |
| 124 | void *data; |
| 125 | size_t length; |
| 126 | }; |
| 127 | |
| 128 | struct descriptor_resource { |
| 129 | struct client_resource resource; |
| 130 | struct fw_descriptor descriptor; |
| 131 | u32 data[0]; |
| 132 | }; |
| 133 | |
Jay Fenlason, Stefan Richter | b1bda4c | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 134 | struct iso_resource { |
| 135 | struct client_resource resource; |
| 136 | struct client *client; |
| 137 | /* Schedule work and access todo only with client->lock held. */ |
| 138 | struct delayed_work work; |
Stefan Richter | 1ec3c02 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 139 | enum {ISO_RES_ALLOC, ISO_RES_REALLOC, ISO_RES_DEALLOC, |
| 140 | ISO_RES_ALLOC_ONCE, ISO_RES_DEALLOC_ONCE,} todo; |
Jay Fenlason, Stefan Richter | b1bda4c | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 141 | int generation; |
| 142 | u64 channels; |
| 143 | s32 bandwidth; |
| 144 | struct iso_resource_event *e_alloc, *e_dealloc; |
| 145 | }; |
| 146 | |
Jay Fenlason, Stefan Richter | b1bda4c | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 147 | static void release_iso_resource(struct client *, struct client_resource *); |
| 148 | |
Stefan Richter | 9fb551b | 2009-10-08 00:41:10 +0200 | [diff] [blame] | 149 | static void schedule_iso_resource(struct iso_resource *r, unsigned long delay) |
| 150 | { |
| 151 | client_get(r->client); |
Stefan Richter | 105e53f | 2011-05-01 20:50:31 +0200 | [diff] [blame] | 152 | if (!queue_delayed_work(fw_workqueue, &r->work, delay)) |
Stefan Richter | 9fb551b | 2009-10-08 00:41:10 +0200 | [diff] [blame] | 153 | client_put(r->client); |
| 154 | } |
| 155 | |
| 156 | static void schedule_if_iso_resource(struct client_resource *resource) |
| 157 | { |
| 158 | if (resource->release == release_iso_resource) |
| 159 | schedule_iso_resource(container_of(resource, |
| 160 | struct iso_resource, resource), 0); |
| 161 | } |
| 162 | |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 163 | /* |
| 164 | * dequeue_event() just kfree()'s the event, so the event has to be |
| 165 | * the first field in a struct XYZ_event. |
| 166 | */ |
| 167 | struct event { |
| 168 | struct { void *data; size_t size; } v[2]; |
| 169 | struct list_head link; |
| 170 | }; |
| 171 | |
| 172 | struct bus_reset_event { |
| 173 | struct event event; |
| 174 | struct fw_cdev_event_bus_reset reset; |
| 175 | }; |
| 176 | |
| 177 | struct outbound_transaction_event { |
| 178 | struct event event; |
| 179 | struct client *client; |
| 180 | struct outbound_transaction_resource r; |
| 181 | struct fw_cdev_event_response response; |
| 182 | }; |
| 183 | |
| 184 | struct inbound_transaction_event { |
| 185 | struct event event; |
Stefan Richter | e205597 | 2010-06-20 22:53:55 +0200 | [diff] [blame] | 186 | union { |
| 187 | struct fw_cdev_event_request request; |
| 188 | struct fw_cdev_event_request2 request2; |
| 189 | } req; |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 190 | }; |
| 191 | |
| 192 | struct iso_interrupt_event { |
| 193 | struct event event; |
| 194 | struct fw_cdev_event_iso_interrupt interrupt; |
| 195 | }; |
| 196 | |
Stefan Richter | 872e330 | 2010-07-29 18:19:22 +0200 | [diff] [blame] | 197 | struct iso_interrupt_mc_event { |
| 198 | struct event event; |
| 199 | struct fw_cdev_event_iso_interrupt_mc interrupt; |
| 200 | }; |
| 201 | |
Jay Fenlason, Stefan Richter | b1bda4c | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 202 | struct iso_resource_event { |
| 203 | struct event event; |
Stefan Richter | e21fcf7 | 2009-10-08 00:41:38 +0200 | [diff] [blame] | 204 | struct fw_cdev_event_iso_resource iso_resource; |
Jay Fenlason, Stefan Richter | b1bda4c | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 205 | }; |
| 206 | |
Stefan Richter | 850bb6f | 2010-07-16 22:25:14 +0200 | [diff] [blame] | 207 | struct outbound_phy_packet_event { |
| 208 | struct event event; |
| 209 | struct client *client; |
| 210 | struct fw_packet p; |
| 211 | struct fw_cdev_event_phy_packet phy_packet; |
| 212 | }; |
| 213 | |
Stefan Richter | bf54e14 | 2010-07-16 22:25:51 +0200 | [diff] [blame] | 214 | struct inbound_phy_packet_event { |
| 215 | struct event event; |
| 216 | struct fw_cdev_event_phy_packet phy_packet; |
| 217 | }; |
| 218 | |
Stefan Richter | 9c1176b | 2011-08-11 00:06:04 +0200 | [diff] [blame] | 219 | #ifdef CONFIG_COMPAT |
| 220 | static void __user *u64_to_uptr(u64 value) |
| 221 | { |
| 222 | if (is_compat_task()) |
| 223 | return compat_ptr(value); |
| 224 | else |
| 225 | return (void __user *)(unsigned long)value; |
| 226 | } |
| 227 | |
| 228 | static u64 uptr_to_u64(void __user *ptr) |
| 229 | { |
| 230 | if (is_compat_task()) |
| 231 | return ptr_to_compat(ptr); |
| 232 | else |
| 233 | return (u64)(unsigned long)ptr; |
| 234 | } |
| 235 | #else |
| 236 | static inline void __user *u64_to_uptr(u64 value) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 237 | { |
| 238 | return (void __user *)(unsigned long)value; |
| 239 | } |
| 240 | |
Stefan Richter | 9c1176b | 2011-08-11 00:06:04 +0200 | [diff] [blame] | 241 | static inline u64 uptr_to_u64(void __user *ptr) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 242 | { |
Stefan Richter | 9c1176b | 2011-08-11 00:06:04 +0200 | [diff] [blame] | 243 | return (u64)(unsigned long)ptr; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 244 | } |
Stefan Richter | 9c1176b | 2011-08-11 00:06:04 +0200 | [diff] [blame] | 245 | #endif /* CONFIG_COMPAT */ |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 246 | |
| 247 | static int fw_device_op_open(struct inode *inode, struct file *file) |
| 248 | { |
| 249 | struct fw_device *device; |
| 250 | struct client *client; |
| 251 | |
Stefan Richter | 96b1906 | 2008-02-02 15:01:09 +0100 | [diff] [blame] | 252 | device = fw_device_get_by_devt(inode->i_rdev); |
Kristian Høgsberg | a3aca3d | 2007-03-07 12:12:44 -0500 | [diff] [blame] | 253 | if (device == NULL) |
| 254 | return -ENODEV; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 255 | |
Jay Fenlason | 551f4cb | 2008-05-16 11:15:23 -0400 | [diff] [blame] | 256 | if (fw_device_is_shutdown(device)) { |
| 257 | fw_device_put(device); |
| 258 | return -ENODEV; |
| 259 | } |
| 260 | |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 261 | client = kzalloc(sizeof(*client), GFP_KERNEL); |
Stefan Richter | 96b1906 | 2008-02-02 15:01:09 +0100 | [diff] [blame] | 262 | if (client == NULL) { |
| 263 | fw_device_put(device); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 264 | return -ENOMEM; |
Stefan Richter | 96b1906 | 2008-02-02 15:01:09 +0100 | [diff] [blame] | 265 | } |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 266 | |
Stefan Richter | 96b1906 | 2008-02-02 15:01:09 +0100 | [diff] [blame] | 267 | client->device = device; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 268 | spin_lock_init(&client->lock); |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame] | 269 | idr_init(&client->resource_idr); |
| 270 | INIT_LIST_HEAD(&client->event_list); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 271 | init_waitqueue_head(&client->wait); |
Clemens Ladisch | 5a5e62d | 2011-01-10 17:28:39 +0100 | [diff] [blame] | 272 | init_waitqueue_head(&client->tx_flush_wait); |
Stefan Richter | bf54e14 | 2010-07-16 22:25:51 +0200 | [diff] [blame] | 273 | INIT_LIST_HEAD(&client->phy_receiver_link); |
Stefan Richter | 93b3790 | 2011-07-09 16:43:22 +0200 | [diff] [blame] | 274 | INIT_LIST_HEAD(&client->link); |
Stefan Richter | fb44303 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 275 | kref_init(&client->kref); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 276 | |
| 277 | file->private_data = client; |
| 278 | |
Stefan Richter | 3ac26b2 | 2010-04-10 16:38:05 +0100 | [diff] [blame] | 279 | return nonseekable_open(inode, file); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 280 | } |
| 281 | |
| 282 | static void queue_event(struct client *client, struct event *event, |
| 283 | void *data0, size_t size0, void *data1, size_t size1) |
| 284 | { |
| 285 | unsigned long flags; |
| 286 | |
| 287 | event->v[0].data = data0; |
| 288 | event->v[0].size = size0; |
| 289 | event->v[1].data = data1; |
| 290 | event->v[1].size = size1; |
| 291 | |
| 292 | spin_lock_irqsave(&client->lock, flags); |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame] | 293 | if (client->in_shutdown) |
| 294 | kfree(event); |
| 295 | else |
| 296 | list_add_tail(&event->link, &client->event_list); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 297 | spin_unlock_irqrestore(&client->lock, flags); |
Jay Fenlason | 83431cb | 2007-10-08 17:00:29 -0400 | [diff] [blame] | 298 | |
| 299 | wake_up_interruptible(&client->wait); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 300 | } |
| 301 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 302 | static int dequeue_event(struct client *client, |
| 303 | char __user *buffer, size_t count) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 304 | { |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 305 | struct event *event; |
| 306 | size_t size, total; |
Stefan Richter | 2dbd7d7 | 2008-12-14 21:45:45 +0100 | [diff] [blame] | 307 | int i, ret; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 308 | |
Stefan Richter | 2dbd7d7 | 2008-12-14 21:45:45 +0100 | [diff] [blame] | 309 | ret = wait_event_interruptible(client->wait, |
| 310 | !list_empty(&client->event_list) || |
| 311 | fw_device_is_shutdown(client->device)); |
| 312 | if (ret < 0) |
| 313 | return ret; |
Kristian Høgsberg | 2603bf2 | 2007-03-07 12:12:48 -0500 | [diff] [blame] | 314 | |
| 315 | if (list_empty(&client->event_list) && |
| 316 | fw_device_is_shutdown(client->device)) |
| 317 | return -ENODEV; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 318 | |
Stefan Richter | 3ba9498 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 319 | spin_lock_irq(&client->lock); |
Stefan Richter | a459b8a | 2008-12-21 16:49:57 +0100 | [diff] [blame] | 320 | event = list_first_entry(&client->event_list, struct event, link); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 321 | list_del(&event->link); |
Stefan Richter | 3ba9498 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 322 | spin_unlock_irq(&client->lock); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 323 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 324 | total = 0; |
| 325 | for (i = 0; i < ARRAY_SIZE(event->v) && total < count; i++) { |
| 326 | size = min(event->v[i].size, count - total); |
Kristian Høgsberg | 2603bf2 | 2007-03-07 12:12:48 -0500 | [diff] [blame] | 327 | if (copy_to_user(buffer + total, event->v[i].data, size)) { |
Stefan Richter | 2dbd7d7 | 2008-12-14 21:45:45 +0100 | [diff] [blame] | 328 | ret = -EFAULT; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 329 | goto out; |
Kristian Høgsberg | 2603bf2 | 2007-03-07 12:12:48 -0500 | [diff] [blame] | 330 | } |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 331 | total += size; |
| 332 | } |
Stefan Richter | 2dbd7d7 | 2008-12-14 21:45:45 +0100 | [diff] [blame] | 333 | ret = total; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 334 | |
| 335 | out: |
| 336 | kfree(event); |
| 337 | |
Stefan Richter | 2dbd7d7 | 2008-12-14 21:45:45 +0100 | [diff] [blame] | 338 | return ret; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 339 | } |
| 340 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 341 | static ssize_t fw_device_op_read(struct file *file, char __user *buffer, |
| 342 | size_t count, loff_t *offset) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 343 | { |
| 344 | struct client *client = file->private_data; |
| 345 | |
| 346 | return dequeue_event(client, buffer, count); |
| 347 | } |
| 348 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 349 | static void fill_bus_reset_event(struct fw_cdev_event_bus_reset *event, |
| 350 | struct client *client) |
Kristian Høgsberg | 344bbc4 | 2007-03-07 12:12:43 -0500 | [diff] [blame] | 351 | { |
Kristian Høgsberg | da8ecff | 2007-03-27 01:43:39 -0400 | [diff] [blame] | 352 | struct fw_card *card = client->device->card; |
Jay Fenlason | cf417e54 | 2008-10-03 11:19:09 -0400 | [diff] [blame] | 353 | |
Stefan Richter | 3ba9498 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 354 | spin_lock_irq(&card->lock); |
Kristian Høgsberg | 344bbc4 | 2007-03-07 12:12:43 -0500 | [diff] [blame] | 355 | |
Kristian Høgsberg | da8ecff | 2007-03-27 01:43:39 -0400 | [diff] [blame] | 356 | event->closure = client->bus_reset_closure; |
Kristian Høgsberg | 344bbc4 | 2007-03-07 12:12:43 -0500 | [diff] [blame] | 357 | event->type = FW_CDEV_EVENT_BUS_RESET; |
Stefan Richter | cf5a56a | 2008-01-24 01:53:51 +0100 | [diff] [blame] | 358 | event->generation = client->device->generation; |
Kristian Høgsberg | da8ecff | 2007-03-27 01:43:39 -0400 | [diff] [blame] | 359 | event->node_id = client->device->node_id; |
Kristian Høgsberg | 344bbc4 | 2007-03-07 12:12:43 -0500 | [diff] [blame] | 360 | event->local_node_id = card->local_node->node_id; |
Stefan Richter | 250b2b6 | 2010-06-21 23:24:35 +0200 | [diff] [blame] | 361 | event->bm_node_id = card->bm_node_id; |
Kristian Høgsberg | 344bbc4 | 2007-03-07 12:12:43 -0500 | [diff] [blame] | 362 | event->irm_node_id = card->irm_node->node_id; |
| 363 | event->root_node_id = card->root_node->node_id; |
Jay Fenlason | cf417e54 | 2008-10-03 11:19:09 -0400 | [diff] [blame] | 364 | |
Stefan Richter | 3ba9498 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 365 | spin_unlock_irq(&card->lock); |
Kristian Høgsberg | 344bbc4 | 2007-03-07 12:12:43 -0500 | [diff] [blame] | 366 | } |
| 367 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 368 | static void for_each_client(struct fw_device *device, |
| 369 | void (*callback)(struct client *client)) |
Kristian Høgsberg | 2603bf2 | 2007-03-07 12:12:48 -0500 | [diff] [blame] | 370 | { |
Kristian Høgsberg | 2603bf2 | 2007-03-07 12:12:48 -0500 | [diff] [blame] | 371 | struct client *c; |
Kristian Høgsberg | 2603bf2 | 2007-03-07 12:12:48 -0500 | [diff] [blame] | 372 | |
Stefan Richter | d67cfb9 | 2008-10-05 10:37:11 +0200 | [diff] [blame] | 373 | mutex_lock(&device->client_list_mutex); |
Kristian Høgsberg | 2603bf2 | 2007-03-07 12:12:48 -0500 | [diff] [blame] | 374 | list_for_each_entry(c, &device->client_list, link) |
| 375 | callback(c); |
Stefan Richter | d67cfb9 | 2008-10-05 10:37:11 +0200 | [diff] [blame] | 376 | mutex_unlock(&device->client_list_mutex); |
Kristian Høgsberg | 2603bf2 | 2007-03-07 12:12:48 -0500 | [diff] [blame] | 377 | } |
| 378 | |
Jay Fenlason, Stefan Richter | b1bda4c | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 379 | static int schedule_reallocations(int id, void *p, void *data) |
| 380 | { |
Stefan Richter | 9fb551b | 2009-10-08 00:41:10 +0200 | [diff] [blame] | 381 | schedule_if_iso_resource(p); |
Jay Fenlason, Stefan Richter | b1bda4c | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 382 | |
Jay Fenlason, Stefan Richter | b1bda4c | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 383 | return 0; |
| 384 | } |
| 385 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 386 | static void queue_bus_reset_event(struct client *client) |
Kristian Høgsberg | 97bd9ef | 2007-03-07 12:12:41 -0500 | [diff] [blame] | 387 | { |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 388 | struct bus_reset_event *e; |
Kristian Høgsberg | 97bd9ef | 2007-03-07 12:12:41 -0500 | [diff] [blame] | 389 | |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 390 | e = kzalloc(sizeof(*e), GFP_KERNEL); |
| 391 | if (e == NULL) { |
Stefan Richter | 26b4950 | 2012-02-18 22:03:14 +0100 | [diff] [blame] | 392 | fw_notice(client->device->card, "out of memory when allocating event\n"); |
Kristian Høgsberg | 97bd9ef | 2007-03-07 12:12:41 -0500 | [diff] [blame] | 393 | return; |
| 394 | } |
| 395 | |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 396 | fill_bus_reset_event(&e->reset, client); |
Kristian Høgsberg | 97bd9ef | 2007-03-07 12:12:41 -0500 | [diff] [blame] | 397 | |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 398 | queue_event(client, &e->event, |
| 399 | &e->reset, sizeof(e->reset), NULL, 0); |
Jay Fenlason, Stefan Richter | b1bda4c | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 400 | |
| 401 | spin_lock_irq(&client->lock); |
| 402 | idr_for_each(&client->resource_idr, schedule_reallocations, client); |
| 403 | spin_unlock_irq(&client->lock); |
Kristian Høgsberg | 97bd9ef | 2007-03-07 12:12:41 -0500 | [diff] [blame] | 404 | } |
| 405 | |
| 406 | void fw_device_cdev_update(struct fw_device *device) |
| 407 | { |
Kristian Høgsberg | 2603bf2 | 2007-03-07 12:12:48 -0500 | [diff] [blame] | 408 | for_each_client(device, queue_bus_reset_event); |
| 409 | } |
Kristian Høgsberg | 97bd9ef | 2007-03-07 12:12:41 -0500 | [diff] [blame] | 410 | |
Kristian Høgsberg | 2603bf2 | 2007-03-07 12:12:48 -0500 | [diff] [blame] | 411 | static void wake_up_client(struct client *client) |
| 412 | { |
| 413 | wake_up_interruptible(&client->wait); |
| 414 | } |
Kristian Høgsberg | 97bd9ef | 2007-03-07 12:12:41 -0500 | [diff] [blame] | 415 | |
Kristian Høgsberg | 2603bf2 | 2007-03-07 12:12:48 -0500 | [diff] [blame] | 416 | void fw_device_cdev_remove(struct fw_device *device) |
| 417 | { |
| 418 | for_each_client(device, wake_up_client); |
Kristian Høgsberg | 97bd9ef | 2007-03-07 12:12:41 -0500 | [diff] [blame] | 419 | } |
| 420 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 421 | union ioctl_arg { |
| 422 | struct fw_cdev_get_info get_info; |
| 423 | struct fw_cdev_send_request send_request; |
| 424 | struct fw_cdev_allocate allocate; |
| 425 | struct fw_cdev_deallocate deallocate; |
| 426 | struct fw_cdev_send_response send_response; |
| 427 | struct fw_cdev_initiate_bus_reset initiate_bus_reset; |
| 428 | struct fw_cdev_add_descriptor add_descriptor; |
| 429 | struct fw_cdev_remove_descriptor remove_descriptor; |
| 430 | struct fw_cdev_create_iso_context create_iso_context; |
| 431 | struct fw_cdev_queue_iso queue_iso; |
| 432 | struct fw_cdev_start_iso start_iso; |
| 433 | struct fw_cdev_stop_iso stop_iso; |
| 434 | struct fw_cdev_get_cycle_timer get_cycle_timer; |
| 435 | struct fw_cdev_allocate_iso_resource allocate_iso_resource; |
| 436 | struct fw_cdev_send_stream_packet send_stream_packet; |
| 437 | struct fw_cdev_get_cycle_timer2 get_cycle_timer2; |
Stefan Richter | 850bb6f | 2010-07-16 22:25:14 +0200 | [diff] [blame] | 438 | struct fw_cdev_send_phy_packet send_phy_packet; |
Stefan Richter | bf54e14 | 2010-07-16 22:25:51 +0200 | [diff] [blame] | 439 | struct fw_cdev_receive_phy_packets receive_phy_packets; |
Stefan Richter | 872e330 | 2010-07-29 18:19:22 +0200 | [diff] [blame] | 440 | struct fw_cdev_set_iso_channels set_iso_channels; |
Clemens Ladisch | d1bbd20 | 2012-03-18 19:06:39 +0100 | [diff] [blame] | 441 | struct fw_cdev_flush_iso flush_iso; |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 442 | }; |
| 443 | |
| 444 | static int ioctl_get_info(struct client *client, union ioctl_arg *arg) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 445 | { |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 446 | struct fw_cdev_get_info *a = &arg->get_info; |
Kristian Høgsberg | 344bbc4 | 2007-03-07 12:12:43 -0500 | [diff] [blame] | 447 | struct fw_cdev_event_bus_reset bus_reset; |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 448 | unsigned long ret = 0; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 449 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 450 | client->version = a->version; |
Stefan Richter | 604f451 | 2010-06-20 22:52:55 +0200 | [diff] [blame] | 451 | a->version = FW_CDEV_KERNEL_VERSION; |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 452 | a->card = client->device->card->index; |
Kristian Høgsberg | 344bbc4 | 2007-03-07 12:12:43 -0500 | [diff] [blame] | 453 | |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 454 | down_read(&fw_device_rwsem); |
| 455 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 456 | if (a->rom != 0) { |
| 457 | size_t want = a->rom_length; |
Stefan Richter | d84702a | 2007-03-20 19:42:15 +0100 | [diff] [blame] | 458 | size_t have = client->device->config_rom_length * 4; |
Kristian Høgsberg | 344bbc4 | 2007-03-07 12:12:43 -0500 | [diff] [blame] | 459 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 460 | ret = copy_to_user(u64_to_uptr(a->rom), |
| 461 | client->device->config_rom, min(want, have)); |
Kristian Høgsberg | 344bbc4 | 2007-03-07 12:12:43 -0500 | [diff] [blame] | 462 | } |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 463 | a->rom_length = client->device->config_rom_length * 4; |
Kristian Høgsberg | 344bbc4 | 2007-03-07 12:12:43 -0500 | [diff] [blame] | 464 | |
Stefan Richter | c9755e1 | 2008-03-24 20:54:28 +0100 | [diff] [blame] | 465 | up_read(&fw_device_rwsem); |
| 466 | |
| 467 | if (ret != 0) |
| 468 | return -EFAULT; |
| 469 | |
Stefan Richter | 93b3790 | 2011-07-09 16:43:22 +0200 | [diff] [blame] | 470 | mutex_lock(&client->device->client_list_mutex); |
| 471 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 472 | client->bus_reset_closure = a->bus_reset_closure; |
| 473 | if (a->bus_reset != 0) { |
Kristian Høgsberg | da8ecff | 2007-03-27 01:43:39 -0400 | [diff] [blame] | 474 | fill_bus_reset_event(&bus_reset, client); |
Stefan Richter | 93b3790 | 2011-07-09 16:43:22 +0200 | [diff] [blame] | 475 | ret = copy_to_user(u64_to_uptr(a->bus_reset), |
| 476 | &bus_reset, sizeof(bus_reset)); |
Kristian Høgsberg | 344bbc4 | 2007-03-07 12:12:43 -0500 | [diff] [blame] | 477 | } |
Stefan Richter | 93b3790 | 2011-07-09 16:43:22 +0200 | [diff] [blame] | 478 | if (ret == 0 && list_empty(&client->link)) |
| 479 | list_add_tail(&client->link, &client->device->client_list); |
Kristian Høgsberg | 344bbc4 | 2007-03-07 12:12:43 -0500 | [diff] [blame] | 480 | |
Stefan Richter | 93b3790 | 2011-07-09 16:43:22 +0200 | [diff] [blame] | 481 | mutex_unlock(&client->device->client_list_mutex); |
| 482 | |
| 483 | return ret ? -EFAULT : 0; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 484 | } |
| 485 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 486 | static int add_client_resource(struct client *client, |
| 487 | struct client_resource *resource, gfp_t gfp_mask) |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 488 | { |
| 489 | unsigned long flags; |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame] | 490 | int ret; |
| 491 | |
| 492 | retry: |
| 493 | if (idr_pre_get(&client->resource_idr, gfp_mask) == 0) |
| 494 | return -ENOMEM; |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 495 | |
| 496 | spin_lock_irqsave(&client->lock, flags); |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame] | 497 | if (client->in_shutdown) |
| 498 | ret = -ECANCELED; |
| 499 | else |
| 500 | ret = idr_get_new(&client->resource_idr, resource, |
| 501 | &resource->handle); |
Jay Fenlason, Stefan Richter | b1bda4c | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 502 | if (ret >= 0) { |
Stefan Richter | fb44303 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 503 | client_get(client); |
Stefan Richter | 9fb551b | 2009-10-08 00:41:10 +0200 | [diff] [blame] | 504 | schedule_if_iso_resource(resource); |
Jay Fenlason, Stefan Richter | b1bda4c | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 505 | } |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 506 | spin_unlock_irqrestore(&client->lock, flags); |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame] | 507 | |
| 508 | if (ret == -EAGAIN) |
| 509 | goto retry; |
| 510 | |
| 511 | return ret < 0 ? ret : 0; |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 512 | } |
| 513 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 514 | static int release_client_resource(struct client *client, u32 handle, |
| 515 | client_resource_release_fn_t release, |
Stefan Richter | e21fcf7 | 2009-10-08 00:41:38 +0200 | [diff] [blame] | 516 | struct client_resource **return_resource) |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 517 | { |
Stefan Richter | e21fcf7 | 2009-10-08 00:41:38 +0200 | [diff] [blame] | 518 | struct client_resource *resource; |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 519 | |
Stefan Richter | 3ba9498 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 520 | spin_lock_irq(&client->lock); |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame] | 521 | if (client->in_shutdown) |
Stefan Richter | e21fcf7 | 2009-10-08 00:41:38 +0200 | [diff] [blame] | 522 | resource = NULL; |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame] | 523 | else |
Stefan Richter | e21fcf7 | 2009-10-08 00:41:38 +0200 | [diff] [blame] | 524 | resource = idr_find(&client->resource_idr, handle); |
| 525 | if (resource && resource->release == release) |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame] | 526 | idr_remove(&client->resource_idr, handle); |
Stefan Richter | 3ba9498 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 527 | spin_unlock_irq(&client->lock); |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 528 | |
Stefan Richter | e21fcf7 | 2009-10-08 00:41:38 +0200 | [diff] [blame] | 529 | if (!(resource && resource->release == release)) |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 530 | return -EINVAL; |
| 531 | |
Stefan Richter | e21fcf7 | 2009-10-08 00:41:38 +0200 | [diff] [blame] | 532 | if (return_resource) |
| 533 | *return_resource = resource; |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 534 | else |
Stefan Richter | e21fcf7 | 2009-10-08 00:41:38 +0200 | [diff] [blame] | 535 | resource->release(client, resource); |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 536 | |
Stefan Richter | fb44303 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 537 | client_put(client); |
| 538 | |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 539 | return 0; |
| 540 | } |
| 541 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 542 | static void release_transaction(struct client *client, |
| 543 | struct client_resource *resource) |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 544 | { |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 545 | } |
| 546 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 547 | static void complete_transaction(struct fw_card *card, int rcode, |
| 548 | void *payload, size_t length, void *data) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 549 | { |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 550 | struct outbound_transaction_event *e = data; |
| 551 | struct fw_cdev_event_response *rsp = &e->response; |
| 552 | struct client *client = e->client; |
Kristian Høgsberg | 28cf6a0 | 2007-03-07 12:12:50 -0500 | [diff] [blame] | 553 | unsigned long flags; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 554 | |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 555 | if (length < rsp->length) |
| 556 | rsp->length = length; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 557 | if (rcode == RCODE_COMPLETE) |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 558 | memcpy(rsp->data, payload, rsp->length); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 559 | |
Kristian Høgsberg | 28cf6a0 | 2007-03-07 12:12:50 -0500 | [diff] [blame] | 560 | spin_lock_irqsave(&client->lock, flags); |
Clemens Ladisch | 5a5e62d | 2011-01-10 17:28:39 +0100 | [diff] [blame] | 561 | idr_remove(&client->resource_idr, e->r.resource.handle); |
| 562 | if (client->in_shutdown) |
| 563 | wake_up(&client->tx_flush_wait); |
Kristian Høgsberg | 28cf6a0 | 2007-03-07 12:12:50 -0500 | [diff] [blame] | 564 | spin_unlock_irqrestore(&client->lock, flags); |
| 565 | |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 566 | rsp->type = FW_CDEV_EVENT_RESPONSE; |
| 567 | rsp->rcode = rcode; |
David Moore | 8401d92 | 2008-07-29 23:46:25 -0700 | [diff] [blame] | 568 | |
| 569 | /* |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 570 | * In the case that sizeof(*rsp) doesn't align with the position of the |
David Moore | 8401d92 | 2008-07-29 23:46:25 -0700 | [diff] [blame] | 571 | * data, and the read is short, preserve an extra copy of the data |
| 572 | * to stay compatible with a pre-2.6.27 bug. Since the bug is harmless |
| 573 | * for short reads and some apps depended on it, this is both safe |
| 574 | * and prudent for compatibility. |
| 575 | */ |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 576 | if (rsp->length <= sizeof(*rsp) - offsetof(typeof(*rsp), data)) |
| 577 | queue_event(client, &e->event, rsp, sizeof(*rsp), |
| 578 | rsp->data, rsp->length); |
David Moore | 8401d92 | 2008-07-29 23:46:25 -0700 | [diff] [blame] | 579 | else |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 580 | queue_event(client, &e->event, rsp, sizeof(*rsp) + rsp->length, |
David Moore | 8401d92 | 2008-07-29 23:46:25 -0700 | [diff] [blame] | 581 | NULL, 0); |
Stefan Richter | fb44303 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 582 | |
Clemens Ladisch | 5a5e62d | 2011-01-10 17:28:39 +0100 | [diff] [blame] | 583 | /* Drop the idr's reference */ |
| 584 | client_put(client); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 585 | } |
| 586 | |
Jay Fenlason, Stefan Richter | acfe833 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 587 | static int init_request(struct client *client, |
| 588 | struct fw_cdev_send_request *request, |
| 589 | int destination_id, int speed) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 590 | { |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 591 | struct outbound_transaction_event *e; |
Stefan Richter | 1f3125a | 2008-12-05 22:44:42 +0100 | [diff] [blame] | 592 | int ret; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 593 | |
Stefan Richter | 18e9b10 | 2009-03-10 21:02:21 +0100 | [diff] [blame] | 594 | if (request->tcode != TCODE_STREAM_DATA && |
| 595 | (request->length > 4096 || request->length > 512 << speed)) |
Stefan Richter | 5d3fd69 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 596 | return -EIO; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 597 | |
Clemens Ladisch | a8e93f3 | 2010-07-07 14:37:30 +0200 | [diff] [blame] | 598 | if (request->tcode == TCODE_WRITE_QUADLET_REQUEST && |
| 599 | request->length < 4) |
| 600 | return -EINVAL; |
| 601 | |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 602 | e = kmalloc(sizeof(*e) + request->length, GFP_KERNEL); |
| 603 | if (e == NULL) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 604 | return -ENOMEM; |
| 605 | |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 606 | e->client = client; |
| 607 | e->response.length = request->length; |
| 608 | e->response.closure = request->closure; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 609 | |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 610 | if (request->data && |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 611 | copy_from_user(e->response.data, |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 612 | u64_to_uptr(request->data), request->length)) { |
Stefan Richter | 1f3125a | 2008-12-05 22:44:42 +0100 | [diff] [blame] | 613 | ret = -EFAULT; |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame] | 614 | goto failed; |
Stefan Richter | 1f3125a | 2008-12-05 22:44:42 +0100 | [diff] [blame] | 615 | } |
| 616 | |
Jay Fenlason, Stefan Richter | acfe833 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 617 | e->r.resource.release = release_transaction; |
| 618 | ret = add_client_resource(client, &e->r.resource, GFP_KERNEL); |
| 619 | if (ret < 0) |
| 620 | goto failed; |
| 621 | |
Jay Fenlason, Stefan Richter | acfe833 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 622 | fw_send_request(client->device->card, &e->r.transaction, |
Stefan Richter | 664d801 | 2009-03-10 21:01:54 +0100 | [diff] [blame] | 623 | request->tcode, destination_id, request->generation, |
| 624 | speed, request->offset, e->response.data, |
| 625 | request->length, complete_transaction, e); |
| 626 | return 0; |
Jay Fenlason, Stefan Richter | acfe833 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 627 | |
Jay Fenlason, Stefan Richter | acfe833 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 628 | failed: |
| 629 | kfree(e); |
| 630 | |
| 631 | return ret; |
| 632 | } |
| 633 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 634 | static int ioctl_send_request(struct client *client, union ioctl_arg *arg) |
Jay Fenlason, Stefan Richter | acfe833 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 635 | { |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 636 | switch (arg->send_request.tcode) { |
Stefan Richter | 1f3125a | 2008-12-05 22:44:42 +0100 | [diff] [blame] | 637 | case TCODE_WRITE_QUADLET_REQUEST: |
| 638 | case TCODE_WRITE_BLOCK_REQUEST: |
| 639 | case TCODE_READ_QUADLET_REQUEST: |
| 640 | case TCODE_READ_BLOCK_REQUEST: |
| 641 | case TCODE_LOCK_MASK_SWAP: |
| 642 | case TCODE_LOCK_COMPARE_SWAP: |
| 643 | case TCODE_LOCK_FETCH_ADD: |
| 644 | case TCODE_LOCK_LITTLE_ADD: |
| 645 | case TCODE_LOCK_BOUNDED_ADD: |
| 646 | case TCODE_LOCK_WRAP_ADD: |
| 647 | case TCODE_LOCK_VENDOR_DEPENDENT: |
| 648 | break; |
| 649 | default: |
Jay Fenlason, Stefan Richter | acfe833 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 650 | return -EINVAL; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 651 | } |
| 652 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 653 | return init_request(client, &arg->send_request, client->device->node_id, |
Jay Fenlason, Stefan Richter | acfe833 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 654 | client->device->max_speed); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 655 | } |
| 656 | |
Stefan Richter | 281e203 | 2010-01-24 16:45:03 +0100 | [diff] [blame] | 657 | static inline bool is_fcp_request(struct fw_request *request) |
| 658 | { |
| 659 | return request == NULL; |
| 660 | } |
| 661 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 662 | static void release_request(struct client *client, |
| 663 | struct client_resource *resource) |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 664 | { |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 665 | struct inbound_transaction_resource *r = container_of(resource, |
| 666 | struct inbound_transaction_resource, resource); |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 667 | |
Stefan Richter | 281e203 | 2010-01-24 16:45:03 +0100 | [diff] [blame] | 668 | if (is_fcp_request(r->request)) |
| 669 | kfree(r->data); |
| 670 | else |
Jay Fenlason | 08bd34c | 2010-05-18 14:02:45 -0400 | [diff] [blame] | 671 | fw_send_response(r->card, r->request, RCODE_CONFLICT_ERROR); |
Stefan Richter | 0244f57 | 2010-06-20 22:52:27 +0200 | [diff] [blame] | 672 | |
| 673 | fw_card_put(r->card); |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 674 | kfree(r); |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 675 | } |
| 676 | |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 677 | static void handle_request(struct fw_card *card, struct fw_request *request, |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 678 | int tcode, int destination, int source, |
Stefan Richter | 33e553f | 2010-06-20 22:50:35 +0200 | [diff] [blame] | 679 | int generation, unsigned long long offset, |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 680 | void *payload, size_t length, void *callback_data) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 681 | { |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 682 | struct address_handler_resource *handler = callback_data; |
| 683 | struct inbound_transaction_resource *r; |
| 684 | struct inbound_transaction_event *e; |
Stefan Richter | e205597 | 2010-06-20 22:53:55 +0200 | [diff] [blame] | 685 | size_t event_size0; |
Stefan Richter | 281e203 | 2010-01-24 16:45:03 +0100 | [diff] [blame] | 686 | void *fcp_frame = NULL; |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame] | 687 | int ret; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 688 | |
Stefan Richter | 0244f57 | 2010-06-20 22:52:27 +0200 | [diff] [blame] | 689 | /* card may be different from handler->client->device->card */ |
| 690 | fw_card_get(card); |
| 691 | |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 692 | r = kmalloc(sizeof(*r), GFP_ATOMIC); |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 693 | e = kmalloc(sizeof(*e), GFP_ATOMIC); |
Stefan Richter | bf54e14 | 2010-07-16 22:25:51 +0200 | [diff] [blame] | 694 | if (r == NULL || e == NULL) { |
Stefan Richter | 26b4950 | 2012-02-18 22:03:14 +0100 | [diff] [blame] | 695 | fw_notice(card, "out of memory when allocating event\n"); |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame] | 696 | goto failed; |
Stefan Richter | bf54e14 | 2010-07-16 22:25:51 +0200 | [diff] [blame] | 697 | } |
Jay Fenlason | 08bd34c | 2010-05-18 14:02:45 -0400 | [diff] [blame] | 698 | r->card = card; |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 699 | r->request = request; |
| 700 | r->data = payload; |
| 701 | r->length = length; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 702 | |
Stefan Richter | 281e203 | 2010-01-24 16:45:03 +0100 | [diff] [blame] | 703 | if (is_fcp_request(request)) { |
| 704 | /* |
| 705 | * FIXME: Let core-transaction.c manage a |
| 706 | * single reference-counted copy? |
| 707 | */ |
| 708 | fcp_frame = kmemdup(payload, length, GFP_ATOMIC); |
| 709 | if (fcp_frame == NULL) |
| 710 | goto failed; |
| 711 | |
| 712 | r->data = fcp_frame; |
| 713 | } |
| 714 | |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 715 | r->resource.release = release_request; |
| 716 | ret = add_client_resource(handler->client, &r->resource, GFP_ATOMIC); |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame] | 717 | if (ret < 0) |
| 718 | goto failed; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 719 | |
Stefan Richter | e205597 | 2010-06-20 22:53:55 +0200 | [diff] [blame] | 720 | if (handler->client->version < FW_CDEV_VERSION_EVENT_REQUEST2) { |
| 721 | struct fw_cdev_event_request *req = &e->req.request; |
| 722 | |
| 723 | if (tcode & 0x10) |
| 724 | tcode = TCODE_LOCK_REQUEST; |
| 725 | |
| 726 | req->type = FW_CDEV_EVENT_REQUEST; |
| 727 | req->tcode = tcode; |
| 728 | req->offset = offset; |
| 729 | req->length = length; |
| 730 | req->handle = r->resource.handle; |
| 731 | req->closure = handler->closure; |
| 732 | event_size0 = sizeof(*req); |
| 733 | } else { |
| 734 | struct fw_cdev_event_request2 *req = &e->req.request2; |
| 735 | |
| 736 | req->type = FW_CDEV_EVENT_REQUEST2; |
| 737 | req->tcode = tcode; |
| 738 | req->offset = offset; |
| 739 | req->source_node_id = source; |
| 740 | req->destination_node_id = destination; |
| 741 | req->card = card->index; |
| 742 | req->generation = generation; |
| 743 | req->length = length; |
| 744 | req->handle = r->resource.handle; |
| 745 | req->closure = handler->closure; |
| 746 | event_size0 = sizeof(*req); |
| 747 | } |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 748 | |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 749 | queue_event(handler->client, &e->event, |
Stefan Richter | e205597 | 2010-06-20 22:53:55 +0200 | [diff] [blame] | 750 | &e->req, event_size0, r->data, length); |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame] | 751 | return; |
| 752 | |
| 753 | failed: |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 754 | kfree(r); |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame] | 755 | kfree(e); |
Stefan Richter | 281e203 | 2010-01-24 16:45:03 +0100 | [diff] [blame] | 756 | kfree(fcp_frame); |
| 757 | |
| 758 | if (!is_fcp_request(request)) |
Clemens Ladisch | db5d247 | 2009-12-24 12:05:58 +0100 | [diff] [blame] | 759 | fw_send_response(card, request, RCODE_CONFLICT_ERROR); |
Stefan Richter | 0244f57 | 2010-06-20 22:52:27 +0200 | [diff] [blame] | 760 | |
| 761 | fw_card_put(card); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 762 | } |
| 763 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 764 | static void release_address_handler(struct client *client, |
| 765 | struct client_resource *resource) |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 766 | { |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 767 | struct address_handler_resource *r = |
| 768 | container_of(resource, struct address_handler_resource, resource); |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 769 | |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 770 | fw_core_remove_address_handler(&r->handler); |
| 771 | kfree(r); |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 772 | } |
| 773 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 774 | static int ioctl_allocate(struct client *client, union ioctl_arg *arg) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 775 | { |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 776 | struct fw_cdev_allocate *a = &arg->allocate; |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 777 | struct address_handler_resource *r; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 778 | struct fw_address_region region; |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame] | 779 | int ret; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 780 | |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 781 | r = kmalloc(sizeof(*r), GFP_KERNEL); |
| 782 | if (r == NULL) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 783 | return -ENOMEM; |
| 784 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 785 | region.start = a->offset; |
Stefan Richter | 8e2b2b4 | 2010-07-23 13:05:39 +0200 | [diff] [blame] | 786 | if (client->version < FW_CDEV_VERSION_ALLOCATE_REGION_END) |
| 787 | region.end = a->offset + a->length; |
| 788 | else |
| 789 | region.end = a->region_end; |
| 790 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 791 | r->handler.length = a->length; |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 792 | r->handler.address_callback = handle_request; |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 793 | r->handler.callback_data = r; |
| 794 | r->closure = a->closure; |
| 795 | r->client = client; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 796 | |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 797 | ret = fw_core_add_address_handler(&r->handler, ®ion); |
Stefan Richter | 3e0b5f0 | 2008-12-14 19:21:01 +0100 | [diff] [blame] | 798 | if (ret < 0) { |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 799 | kfree(r); |
Stefan Richter | 3e0b5f0 | 2008-12-14 19:21:01 +0100 | [diff] [blame] | 800 | return ret; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 801 | } |
Stefan Richter | 8e2b2b4 | 2010-07-23 13:05:39 +0200 | [diff] [blame] | 802 | a->offset = r->handler.offset; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 803 | |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 804 | r->resource.release = release_address_handler; |
| 805 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame] | 806 | if (ret < 0) { |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 807 | release_address_handler(client, &r->resource); |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame] | 808 | return ret; |
| 809 | } |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 810 | a->handle = r->resource.handle; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 811 | |
| 812 | return 0; |
| 813 | } |
| 814 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 815 | static int ioctl_deallocate(struct client *client, union ioctl_arg *arg) |
Kristian Høgsberg | 9472316 | 2007-03-14 17:34:55 -0400 | [diff] [blame] | 816 | { |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 817 | return release_client_resource(client, arg->deallocate.handle, |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame] | 818 | release_address_handler, NULL); |
Kristian Høgsberg | 9472316 | 2007-03-14 17:34:55 -0400 | [diff] [blame] | 819 | } |
| 820 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 821 | static int ioctl_send_response(struct client *client, union ioctl_arg *arg) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 822 | { |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 823 | struct fw_cdev_send_response *a = &arg->send_response; |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 824 | struct client_resource *resource; |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 825 | struct inbound_transaction_resource *r; |
Stefan Richter | 7e44c0b | 2009-10-08 00:39:56 +0200 | [diff] [blame] | 826 | int ret = 0; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 827 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 828 | if (release_client_resource(client, a->handle, |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame] | 829 | release_request, &resource) < 0) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 830 | return -EINVAL; |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame] | 831 | |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 832 | r = container_of(resource, struct inbound_transaction_resource, |
| 833 | resource); |
Stefan Richter | 281e203 | 2010-01-24 16:45:03 +0100 | [diff] [blame] | 834 | if (is_fcp_request(r->request)) |
| 835 | goto out; |
| 836 | |
Clemens Ladisch | a10c0ce7 | 2010-05-19 08:28:32 +0200 | [diff] [blame] | 837 | if (a->length != fw_get_response_length(r->request)) { |
| 838 | ret = -EINVAL; |
| 839 | kfree(r->request); |
| 840 | goto out; |
| 841 | } |
| 842 | if (copy_from_user(r->data, u64_to_uptr(a->data), a->length)) { |
Stefan Richter | 281e203 | 2010-01-24 16:45:03 +0100 | [diff] [blame] | 843 | ret = -EFAULT; |
| 844 | kfree(r->request); |
| 845 | goto out; |
Stefan Richter | 7e44c0b | 2009-10-08 00:39:56 +0200 | [diff] [blame] | 846 | } |
Jay Fenlason | 08bd34c | 2010-05-18 14:02:45 -0400 | [diff] [blame] | 847 | fw_send_response(r->card, r->request, a->rcode); |
Stefan Richter | 7e44c0b | 2009-10-08 00:39:56 +0200 | [diff] [blame] | 848 | out: |
Stefan Richter | 0244f57 | 2010-06-20 22:52:27 +0200 | [diff] [blame] | 849 | fw_card_put(r->card); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 850 | kfree(r); |
| 851 | |
Stefan Richter | 7e44c0b | 2009-10-08 00:39:56 +0200 | [diff] [blame] | 852 | return ret; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 853 | } |
| 854 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 855 | static int ioctl_initiate_bus_reset(struct client *client, union ioctl_arg *arg) |
Kristian Høgsberg | 5371842 | 2007-03-07 12:12:42 -0500 | [diff] [blame] | 856 | { |
Stefan Richter | 02d37be | 2010-07-08 16:09:06 +0200 | [diff] [blame] | 857 | fw_schedule_bus_reset(client->device->card, true, |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 858 | arg->initiate_bus_reset.type == FW_CDEV_SHORT_RESET); |
Stefan Richter | 02d37be | 2010-07-08 16:09:06 +0200 | [diff] [blame] | 859 | return 0; |
Kristian Høgsberg | 5371842 | 2007-03-07 12:12:42 -0500 | [diff] [blame] | 860 | } |
| 861 | |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 862 | static void release_descriptor(struct client *client, |
| 863 | struct client_resource *resource) |
| 864 | { |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 865 | struct descriptor_resource *r = |
| 866 | container_of(resource, struct descriptor_resource, resource); |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 867 | |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 868 | fw_core_remove_descriptor(&r->descriptor); |
| 869 | kfree(r); |
Kristian Høgsberg | 3964a44 | 2007-03-27 01:43:41 -0400 | [diff] [blame] | 870 | } |
| 871 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 872 | static int ioctl_add_descriptor(struct client *client, union ioctl_arg *arg) |
Kristian Høgsberg | 66dea3e | 2007-03-28 21:26:42 +0200 | [diff] [blame] | 873 | { |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 874 | struct fw_cdev_add_descriptor *a = &arg->add_descriptor; |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 875 | struct descriptor_resource *r; |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame] | 876 | int ret; |
Kristian Høgsberg | 66dea3e | 2007-03-28 21:26:42 +0200 | [diff] [blame] | 877 | |
Stefan Richter | de487da | 2009-03-10 21:00:23 +0100 | [diff] [blame] | 878 | /* Access policy: Allow this ioctl only on local nodes' device files. */ |
Stefan Richter | 9236889 | 2009-05-13 21:42:14 +0200 | [diff] [blame] | 879 | if (!client->device->is_local) |
Stefan Richter | de487da | 2009-03-10 21:00:23 +0100 | [diff] [blame] | 880 | return -ENOSYS; |
| 881 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 882 | if (a->length > 256) |
Kristian Høgsberg | 66dea3e | 2007-03-28 21:26:42 +0200 | [diff] [blame] | 883 | return -EINVAL; |
| 884 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 885 | r = kmalloc(sizeof(*r) + a->length * 4, GFP_KERNEL); |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 886 | if (r == NULL) |
Kristian Høgsberg | 66dea3e | 2007-03-28 21:26:42 +0200 | [diff] [blame] | 887 | return -ENOMEM; |
| 888 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 889 | if (copy_from_user(r->data, u64_to_uptr(a->data), a->length * 4)) { |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame] | 890 | ret = -EFAULT; |
| 891 | goto failed; |
Kristian Høgsberg | 66dea3e | 2007-03-28 21:26:42 +0200 | [diff] [blame] | 892 | } |
| 893 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 894 | r->descriptor.length = a->length; |
| 895 | r->descriptor.immediate = a->immediate; |
| 896 | r->descriptor.key = a->key; |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 897 | r->descriptor.data = r->data; |
Kristian Høgsberg | 66dea3e | 2007-03-28 21:26:42 +0200 | [diff] [blame] | 898 | |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 899 | ret = fw_core_add_descriptor(&r->descriptor); |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame] | 900 | if (ret < 0) |
| 901 | goto failed; |
Kristian Høgsberg | 66dea3e | 2007-03-28 21:26:42 +0200 | [diff] [blame] | 902 | |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 903 | r->resource.release = release_descriptor; |
| 904 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame] | 905 | if (ret < 0) { |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 906 | fw_core_remove_descriptor(&r->descriptor); |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame] | 907 | goto failed; |
| 908 | } |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 909 | a->handle = r->resource.handle; |
Kristian Høgsberg | 66dea3e | 2007-03-28 21:26:42 +0200 | [diff] [blame] | 910 | |
| 911 | return 0; |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame] | 912 | failed: |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 913 | kfree(r); |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame] | 914 | |
| 915 | return ret; |
Kristian Høgsberg | 66dea3e | 2007-03-28 21:26:42 +0200 | [diff] [blame] | 916 | } |
| 917 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 918 | static int ioctl_remove_descriptor(struct client *client, union ioctl_arg *arg) |
Kristian Høgsberg | 66dea3e | 2007-03-28 21:26:42 +0200 | [diff] [blame] | 919 | { |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 920 | return release_client_resource(client, arg->remove_descriptor.handle, |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame] | 921 | release_descriptor, NULL); |
Kristian Høgsberg | 66dea3e | 2007-03-28 21:26:42 +0200 | [diff] [blame] | 922 | } |
| 923 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 924 | static void iso_callback(struct fw_iso_context *context, u32 cycle, |
| 925 | size_t header_length, void *header, void *data) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 926 | { |
| 927 | struct client *client = data; |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 928 | struct iso_interrupt_event *e; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 929 | |
Stefan Richter | 56d04cb | 2010-06-08 00:20:10 +0200 | [diff] [blame] | 930 | e = kmalloc(sizeof(*e) + header_length, GFP_ATOMIC); |
Stefan Richter | bf54e14 | 2010-07-16 22:25:51 +0200 | [diff] [blame] | 931 | if (e == NULL) { |
Stefan Richter | 26b4950 | 2012-02-18 22:03:14 +0100 | [diff] [blame] | 932 | fw_notice(context->card, "out of memory when allocating event\n"); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 933 | return; |
Stefan Richter | bf54e14 | 2010-07-16 22:25:51 +0200 | [diff] [blame] | 934 | } |
Stefan Richter | 97c18b7 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 935 | e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT; |
| 936 | e->interrupt.closure = client->iso_closure; |
| 937 | e->interrupt.cycle = cycle; |
| 938 | e->interrupt.header_length = header_length; |
| 939 | memcpy(e->interrupt.header, header, header_length); |
| 940 | queue_event(client, &e->event, &e->interrupt, |
| 941 | sizeof(e->interrupt) + header_length, NULL, 0); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 942 | } |
| 943 | |
Stefan Richter | 872e330 | 2010-07-29 18:19:22 +0200 | [diff] [blame] | 944 | static void iso_mc_callback(struct fw_iso_context *context, |
| 945 | dma_addr_t completed, void *data) |
| 946 | { |
| 947 | struct client *client = data; |
| 948 | struct iso_interrupt_mc_event *e; |
| 949 | |
| 950 | e = kmalloc(sizeof(*e), GFP_ATOMIC); |
| 951 | if (e == NULL) { |
Stefan Richter | 26b4950 | 2012-02-18 22:03:14 +0100 | [diff] [blame] | 952 | fw_notice(context->card, "out of memory when allocating event\n"); |
Stefan Richter | 872e330 | 2010-07-29 18:19:22 +0200 | [diff] [blame] | 953 | return; |
| 954 | } |
| 955 | e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL; |
| 956 | e->interrupt.closure = client->iso_closure; |
| 957 | e->interrupt.completed = fw_iso_buffer_lookup(&client->buffer, |
| 958 | completed); |
| 959 | queue_event(client, &e->event, &e->interrupt, |
| 960 | sizeof(e->interrupt), NULL, 0); |
| 961 | } |
| 962 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 963 | static int ioctl_create_iso_context(struct client *client, union ioctl_arg *arg) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 964 | { |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 965 | struct fw_cdev_create_iso_context *a = &arg->create_iso_context; |
Kristian Høgsberg | 24315c5 | 2007-06-20 17:48:07 -0400 | [diff] [blame] | 966 | struct fw_iso_context *context; |
Stefan Richter | 872e330 | 2010-07-29 18:19:22 +0200 | [diff] [blame] | 967 | fw_iso_callback_t cb; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 968 | |
Stefan Richter | eb5b35a | 2010-07-07 14:13:14 +0200 | [diff] [blame] | 969 | BUILD_BUG_ON(FW_CDEV_ISO_CONTEXT_TRANSMIT != FW_ISO_CONTEXT_TRANSMIT || |
Stefan Richter | 872e330 | 2010-07-29 18:19:22 +0200 | [diff] [blame] | 970 | FW_CDEV_ISO_CONTEXT_RECEIVE != FW_ISO_CONTEXT_RECEIVE || |
| 971 | FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL != |
| 972 | FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL); |
Kristian Høgsberg | 21efb3c | 2007-02-16 17:34:50 -0500 | [diff] [blame] | 973 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 974 | switch (a->type) { |
Stefan Richter | 872e330 | 2010-07-29 18:19:22 +0200 | [diff] [blame] | 975 | case FW_ISO_CONTEXT_TRANSMIT: |
| 976 | if (a->speed > SCODE_3200 || a->channel > 63) |
Kristian Høgsberg | c70dc78 | 2007-03-14 17:34:53 -0400 | [diff] [blame] | 977 | return -EINVAL; |
Stefan Richter | 872e330 | 2010-07-29 18:19:22 +0200 | [diff] [blame] | 978 | |
| 979 | cb = iso_callback; |
Kristian Høgsberg | c70dc78 | 2007-03-14 17:34:53 -0400 | [diff] [blame] | 980 | break; |
| 981 | |
Stefan Richter | 872e330 | 2010-07-29 18:19:22 +0200 | [diff] [blame] | 982 | case FW_ISO_CONTEXT_RECEIVE: |
| 983 | if (a->header_size < 4 || (a->header_size & 3) || |
| 984 | a->channel > 63) |
Kristian Høgsberg | c70dc78 | 2007-03-14 17:34:53 -0400 | [diff] [blame] | 985 | return -EINVAL; |
Stefan Richter | 872e330 | 2010-07-29 18:19:22 +0200 | [diff] [blame] | 986 | |
| 987 | cb = iso_callback; |
| 988 | break; |
| 989 | |
| 990 | case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL: |
| 991 | cb = (fw_iso_callback_t)iso_mc_callback; |
Kristian Høgsberg | c70dc78 | 2007-03-14 17:34:53 -0400 | [diff] [blame] | 992 | break; |
| 993 | |
| 994 | default: |
Kristian Høgsberg | 21efb3c | 2007-02-16 17:34:50 -0500 | [diff] [blame] | 995 | return -EINVAL; |
Kristian Høgsberg | c70dc78 | 2007-03-14 17:34:53 -0400 | [diff] [blame] | 996 | } |
| 997 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 998 | context = fw_iso_context_create(client->device->card, a->type, |
Stefan Richter | 872e330 | 2010-07-29 18:19:22 +0200 | [diff] [blame] | 999 | a->channel, a->speed, a->header_size, cb, client); |
Kristian Høgsberg | 24315c5 | 2007-06-20 17:48:07 -0400 | [diff] [blame] | 1000 | if (IS_ERR(context)) |
| 1001 | return PTR_ERR(context); |
| 1002 | |
Clemens Ladisch | bdfe273 | 2010-06-14 11:46:25 +0200 | [diff] [blame] | 1003 | /* We only support one context at this time. */ |
| 1004 | spin_lock_irq(&client->lock); |
| 1005 | if (client->iso_context != NULL) { |
| 1006 | spin_unlock_irq(&client->lock); |
| 1007 | fw_iso_context_destroy(context); |
| 1008 | return -EBUSY; |
| 1009 | } |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1010 | client->iso_closure = a->closure; |
Kristian Høgsberg | 24315c5 | 2007-06-20 17:48:07 -0400 | [diff] [blame] | 1011 | client->iso_context = context; |
Clemens Ladisch | bdfe273 | 2010-06-14 11:46:25 +0200 | [diff] [blame] | 1012 | spin_unlock_irq(&client->lock); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1013 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1014 | a->handle = 0; |
Kristian Høgsberg | abaa574 | 2007-04-30 15:03:14 -0400 | [diff] [blame] | 1015 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1016 | return 0; |
| 1017 | } |
| 1018 | |
Stefan Richter | 872e330 | 2010-07-29 18:19:22 +0200 | [diff] [blame] | 1019 | static int ioctl_set_iso_channels(struct client *client, union ioctl_arg *arg) |
| 1020 | { |
| 1021 | struct fw_cdev_set_iso_channels *a = &arg->set_iso_channels; |
| 1022 | struct fw_iso_context *ctx = client->iso_context; |
| 1023 | |
| 1024 | if (ctx == NULL || a->handle != 0) |
| 1025 | return -EINVAL; |
| 1026 | |
| 1027 | return fw_iso_context_set_channels(ctx, &a->channels); |
| 1028 | } |
| 1029 | |
Kristian Høgsberg | 1ca31ae | 2007-05-31 11:16:43 -0400 | [diff] [blame] | 1030 | /* Macros for decoding the iso packet control header. */ |
| 1031 | #define GET_PAYLOAD_LENGTH(v) ((v) & 0xffff) |
| 1032 | #define GET_INTERRUPT(v) (((v) >> 16) & 0x01) |
| 1033 | #define GET_SKIP(v) (((v) >> 17) & 0x01) |
Stefan Richter | 7a10034 | 2008-09-12 18:09:55 +0200 | [diff] [blame] | 1034 | #define GET_TAG(v) (((v) >> 18) & 0x03) |
| 1035 | #define GET_SY(v) (((v) >> 20) & 0x0f) |
Kristian Høgsberg | 1ca31ae | 2007-05-31 11:16:43 -0400 | [diff] [blame] | 1036 | #define GET_HEADER_LENGTH(v) (((v) >> 24) & 0xff) |
| 1037 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1038 | static int ioctl_queue_iso(struct client *client, union ioctl_arg *arg) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1039 | { |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1040 | struct fw_cdev_queue_iso *a = &arg->queue_iso; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1041 | struct fw_cdev_iso_packet __user *p, *end, *next; |
Kristian Høgsberg | 9b32d5f | 2007-02-16 17:34:44 -0500 | [diff] [blame] | 1042 | struct fw_iso_context *ctx = client->iso_context; |
Stefan Richter | 872e330 | 2010-07-29 18:19:22 +0200 | [diff] [blame] | 1043 | unsigned long payload, buffer_end, transmit_header_bytes = 0; |
Kristian Høgsberg | 1ca31ae | 2007-05-31 11:16:43 -0400 | [diff] [blame] | 1044 | u32 control; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1045 | int count; |
| 1046 | struct { |
| 1047 | struct fw_iso_packet packet; |
| 1048 | u8 header[256]; |
| 1049 | } u; |
| 1050 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1051 | if (ctx == NULL || a->handle != 0) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1052 | return -EINVAL; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1053 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1054 | /* |
| 1055 | * If the user passes a non-NULL data pointer, has mmap()'ed |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1056 | * the iso buffer, and the pointer points inside the buffer, |
| 1057 | * we setup the payload pointers accordingly. Otherwise we |
Kristian Høgsberg | 9aad812 | 2007-02-16 17:34:38 -0500 | [diff] [blame] | 1058 | * set them both to 0, which will still let packets with |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1059 | * payload_length == 0 through. In other words, if no packets |
| 1060 | * use the indirect payload, the iso buffer need not be mapped |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1061 | * and the a->data pointer is ignored. |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1062 | */ |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1063 | payload = (unsigned long)a->data - client->vm_start; |
Kristian Høgsberg | ef370ee | 2007-03-28 20:46:23 +0200 | [diff] [blame] | 1064 | buffer_end = client->buffer.page_count << PAGE_SHIFT; |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1065 | if (a->data == 0 || client->buffer.pages == NULL || |
Kristian Høgsberg | ef370ee | 2007-03-28 20:46:23 +0200 | [diff] [blame] | 1066 | payload >= buffer_end) { |
Kristian Høgsberg | 9aad812 | 2007-02-16 17:34:38 -0500 | [diff] [blame] | 1067 | payload = 0; |
Kristian Høgsberg | ef370ee | 2007-03-28 20:46:23 +0200 | [diff] [blame] | 1068 | buffer_end = 0; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1069 | } |
| 1070 | |
Stefan Richter | 872e330 | 2010-07-29 18:19:22 +0200 | [diff] [blame] | 1071 | if (ctx->type == FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL && payload & 3) |
| 1072 | return -EINVAL; |
Al Viro | 1ccc914 | 2007-10-14 19:34:40 +0100 | [diff] [blame] | 1073 | |
Stefan Richter | 872e330 | 2010-07-29 18:19:22 +0200 | [diff] [blame] | 1074 | p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(a->packets); |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1075 | if (!access_ok(VERIFY_READ, p, a->size)) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1076 | return -EFAULT; |
| 1077 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1078 | end = (void __user *)p + a->size; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1079 | count = 0; |
| 1080 | while (p < end) { |
Kristian Høgsberg | 1ca31ae | 2007-05-31 11:16:43 -0400 | [diff] [blame] | 1081 | if (get_user(control, &p->control)) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1082 | return -EFAULT; |
Kristian Høgsberg | 1ca31ae | 2007-05-31 11:16:43 -0400 | [diff] [blame] | 1083 | u.packet.payload_length = GET_PAYLOAD_LENGTH(control); |
| 1084 | u.packet.interrupt = GET_INTERRUPT(control); |
| 1085 | u.packet.skip = GET_SKIP(control); |
| 1086 | u.packet.tag = GET_TAG(control); |
| 1087 | u.packet.sy = GET_SY(control); |
| 1088 | u.packet.header_length = GET_HEADER_LENGTH(control); |
Kristian Høgsberg | 295e3fe | 2007-02-16 17:34:40 -0500 | [diff] [blame] | 1089 | |
Stefan Richter | 872e330 | 2010-07-29 18:19:22 +0200 | [diff] [blame] | 1090 | switch (ctx->type) { |
| 1091 | case FW_ISO_CONTEXT_TRANSMIT: |
| 1092 | if (u.packet.header_length & 3) |
Clemens Ladisch | 385ab5b | 2010-03-31 16:26:46 +0200 | [diff] [blame] | 1093 | return -EINVAL; |
Stefan Richter | ae2a976 | 2010-07-29 09:31:56 +0200 | [diff] [blame] | 1094 | transmit_header_bytes = u.packet.header_length; |
Stefan Richter | 872e330 | 2010-07-29 18:19:22 +0200 | [diff] [blame] | 1095 | break; |
| 1096 | |
| 1097 | case FW_ISO_CONTEXT_RECEIVE: |
Stefan Richter | 69e61d0 | 2010-07-28 23:49:45 +0200 | [diff] [blame] | 1098 | if (u.packet.header_length == 0 || |
| 1099 | u.packet.header_length % ctx->header_size != 0) |
Kristian Høgsberg | 295e3fe | 2007-02-16 17:34:40 -0500 | [diff] [blame] | 1100 | return -EINVAL; |
Stefan Richter | 872e330 | 2010-07-29 18:19:22 +0200 | [diff] [blame] | 1101 | break; |
| 1102 | |
| 1103 | case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL: |
| 1104 | if (u.packet.payload_length == 0 || |
| 1105 | u.packet.payload_length & 3) |
| 1106 | return -EINVAL; |
| 1107 | break; |
Kristian Høgsberg | 295e3fe | 2007-02-16 17:34:40 -0500 | [diff] [blame] | 1108 | } |
| 1109 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1110 | next = (struct fw_cdev_iso_packet __user *) |
Stefan Richter | ae2a976 | 2010-07-29 09:31:56 +0200 | [diff] [blame] | 1111 | &p->header[transmit_header_bytes / 4]; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1112 | if (next > end) |
| 1113 | return -EINVAL; |
| 1114 | if (__copy_from_user |
Stefan Richter | ae2a976 | 2010-07-29 09:31:56 +0200 | [diff] [blame] | 1115 | (u.packet.header, p->header, transmit_header_bytes)) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1116 | return -EFAULT; |
Kristian Høgsberg | 98b6cbe | 2007-02-16 17:34:51 -0500 | [diff] [blame] | 1117 | if (u.packet.skip && ctx->type == FW_ISO_CONTEXT_TRANSMIT && |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1118 | u.packet.header_length + u.packet.payload_length > 0) |
| 1119 | return -EINVAL; |
Kristian Høgsberg | ef370ee | 2007-03-28 20:46:23 +0200 | [diff] [blame] | 1120 | if (payload + u.packet.payload_length > buffer_end) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1121 | return -EINVAL; |
| 1122 | |
Kristian Høgsberg | 9b32d5f | 2007-02-16 17:34:44 -0500 | [diff] [blame] | 1123 | if (fw_iso_context_queue(ctx, &u.packet, |
| 1124 | &client->buffer, payload)) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1125 | break; |
| 1126 | |
| 1127 | p = next; |
| 1128 | payload += u.packet.payload_length; |
| 1129 | count++; |
| 1130 | } |
Clemens Ladisch | 13882a8 | 2011-05-02 09:33:56 +0200 | [diff] [blame] | 1131 | fw_iso_context_queue_flush(ctx); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1132 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1133 | a->size -= uptr_to_u64(p) - a->packets; |
| 1134 | a->packets = uptr_to_u64(p); |
| 1135 | a->data = client->vm_start + payload; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1136 | |
| 1137 | return count; |
| 1138 | } |
| 1139 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1140 | static int ioctl_start_iso(struct client *client, union ioctl_arg *arg) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1141 | { |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1142 | struct fw_cdev_start_iso *a = &arg->start_iso; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1143 | |
Stefan Richter | eb5b35a | 2010-07-07 14:13:14 +0200 | [diff] [blame] | 1144 | BUILD_BUG_ON( |
| 1145 | FW_CDEV_ISO_CONTEXT_MATCH_TAG0 != FW_ISO_CONTEXT_MATCH_TAG0 || |
| 1146 | FW_CDEV_ISO_CONTEXT_MATCH_TAG1 != FW_ISO_CONTEXT_MATCH_TAG1 || |
| 1147 | FW_CDEV_ISO_CONTEXT_MATCH_TAG2 != FW_ISO_CONTEXT_MATCH_TAG2 || |
| 1148 | FW_CDEV_ISO_CONTEXT_MATCH_TAG3 != FW_ISO_CONTEXT_MATCH_TAG3 || |
| 1149 | FW_CDEV_ISO_CONTEXT_MATCH_ALL_TAGS != FW_ISO_CONTEXT_MATCH_ALL_TAGS); |
| 1150 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1151 | if (client->iso_context == NULL || a->handle != 0) |
Kristian Høgsberg | abaa574 | 2007-04-30 15:03:14 -0400 | [diff] [blame] | 1152 | return -EINVAL; |
Stefan Richter | fae6031 | 2008-02-20 21:10:06 +0100 | [diff] [blame] | 1153 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1154 | if (client->iso_context->type == FW_ISO_CONTEXT_RECEIVE && |
| 1155 | (a->tags == 0 || a->tags > 15 || a->sync > 15)) |
| 1156 | return -EINVAL; |
Kristian Høgsberg | eb0306e | 2007-03-14 17:34:54 -0400 | [diff] [blame] | 1157 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1158 | return fw_iso_context_start(client->iso_context, |
| 1159 | a->cycle, a->sync, a->tags); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1160 | } |
| 1161 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1162 | static int ioctl_stop_iso(struct client *client, union ioctl_arg *arg) |
Kristian Høgsberg | b829566 | 2007-02-16 17:34:42 -0500 | [diff] [blame] | 1163 | { |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1164 | struct fw_cdev_stop_iso *a = &arg->stop_iso; |
Kristian Høgsberg | abaa574 | 2007-04-30 15:03:14 -0400 | [diff] [blame] | 1165 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1166 | if (client->iso_context == NULL || a->handle != 0) |
Kristian Høgsberg | abaa574 | 2007-04-30 15:03:14 -0400 | [diff] [blame] | 1167 | return -EINVAL; |
| 1168 | |
Kristian Høgsberg | b829566 | 2007-02-16 17:34:42 -0500 | [diff] [blame] | 1169 | return fw_iso_context_stop(client->iso_context); |
| 1170 | } |
| 1171 | |
Clemens Ladisch | d1bbd20 | 2012-03-18 19:06:39 +0100 | [diff] [blame] | 1172 | static int ioctl_flush_iso(struct client *client, union ioctl_arg *arg) |
| 1173 | { |
| 1174 | struct fw_cdev_flush_iso *a = &arg->flush_iso; |
| 1175 | |
| 1176 | if (client->iso_context == NULL || a->handle != 0) |
| 1177 | return -EINVAL; |
| 1178 | |
| 1179 | return fw_iso_context_flush_completions(client->iso_context); |
| 1180 | } |
| 1181 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1182 | static int ioctl_get_cycle_timer2(struct client *client, union ioctl_arg *arg) |
Stefan Richter | a64408b | 2007-09-29 10:41:58 +0200 | [diff] [blame] | 1183 | { |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1184 | struct fw_cdev_get_cycle_timer2 *a = &arg->get_cycle_timer2; |
Stefan Richter | a64408b | 2007-09-29 10:41:58 +0200 | [diff] [blame] | 1185 | struct fw_card *card = client->device->card; |
Stefan Richter | abfe5a0 | 2010-02-20 12:13:49 +0100 | [diff] [blame] | 1186 | struct timespec ts = {0, 0}; |
Stefan Richter | 4a9bde9 | 2010-02-20 22:24:43 +0100 | [diff] [blame] | 1187 | u32 cycle_time; |
Stefan Richter | abfe5a0 | 2010-02-20 12:13:49 +0100 | [diff] [blame] | 1188 | int ret = 0; |
Stefan Richter | a64408b | 2007-09-29 10:41:58 +0200 | [diff] [blame] | 1189 | |
Stefan Richter | 4a9bde9 | 2010-02-20 22:24:43 +0100 | [diff] [blame] | 1190 | local_irq_disable(); |
Stefan Richter | a64408b | 2007-09-29 10:41:58 +0200 | [diff] [blame] | 1191 | |
Stefan Richter | 0fcff4e | 2010-06-12 20:35:52 +0200 | [diff] [blame] | 1192 | cycle_time = card->driver->read_csr(card, CSR_CYCLE_TIME); |
Stefan Richter | abfe5a0 | 2010-02-20 12:13:49 +0100 | [diff] [blame] | 1193 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1194 | switch (a->clk_id) { |
Stefan Richter | abfe5a0 | 2010-02-20 12:13:49 +0100 | [diff] [blame] | 1195 | case CLOCK_REALTIME: getnstimeofday(&ts); break; |
| 1196 | case CLOCK_MONOTONIC: do_posix_clock_monotonic_gettime(&ts); break; |
| 1197 | case CLOCK_MONOTONIC_RAW: getrawmonotonic(&ts); break; |
| 1198 | default: |
| 1199 | ret = -EINVAL; |
| 1200 | } |
Stefan Richter | a64408b | 2007-09-29 10:41:58 +0200 | [diff] [blame] | 1201 | |
Stefan Richter | 4a9bde9 | 2010-02-20 22:24:43 +0100 | [diff] [blame] | 1202 | local_irq_enable(); |
Stefan Richter | a64408b | 2007-09-29 10:41:58 +0200 | [diff] [blame] | 1203 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1204 | a->tv_sec = ts.tv_sec; |
| 1205 | a->tv_nsec = ts.tv_nsec; |
| 1206 | a->cycle_timer = cycle_time; |
Stefan Richter | abfe5a0 | 2010-02-20 12:13:49 +0100 | [diff] [blame] | 1207 | |
| 1208 | return ret; |
| 1209 | } |
| 1210 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1211 | static int ioctl_get_cycle_timer(struct client *client, union ioctl_arg *arg) |
Stefan Richter | abfe5a0 | 2010-02-20 12:13:49 +0100 | [diff] [blame] | 1212 | { |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1213 | struct fw_cdev_get_cycle_timer *a = &arg->get_cycle_timer; |
Stefan Richter | abfe5a0 | 2010-02-20 12:13:49 +0100 | [diff] [blame] | 1214 | struct fw_cdev_get_cycle_timer2 ct2; |
| 1215 | |
| 1216 | ct2.clk_id = CLOCK_REALTIME; |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1217 | ioctl_get_cycle_timer2(client, (union ioctl_arg *)&ct2); |
Stefan Richter | abfe5a0 | 2010-02-20 12:13:49 +0100 | [diff] [blame] | 1218 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1219 | a->local_time = ct2.tv_sec * USEC_PER_SEC + ct2.tv_nsec / NSEC_PER_USEC; |
| 1220 | a->cycle_timer = ct2.cycle_timer; |
Stefan Richter | 4a9bde9 | 2010-02-20 22:24:43 +0100 | [diff] [blame] | 1221 | |
Stefan Richter | a64408b | 2007-09-29 10:41:58 +0200 | [diff] [blame] | 1222 | return 0; |
| 1223 | } |
| 1224 | |
Jay Fenlason, Stefan Richter | b1bda4c | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 1225 | static void iso_resource_work(struct work_struct *work) |
| 1226 | { |
| 1227 | struct iso_resource_event *e; |
| 1228 | struct iso_resource *r = |
| 1229 | container_of(work, struct iso_resource, work.work); |
| 1230 | struct client *client = r->client; |
| 1231 | int generation, channel, bandwidth, todo; |
| 1232 | bool skip, free, success; |
| 1233 | |
| 1234 | spin_lock_irq(&client->lock); |
| 1235 | generation = client->device->generation; |
| 1236 | todo = r->todo; |
| 1237 | /* Allow 1000ms grace period for other reallocations. */ |
| 1238 | if (todo == ISO_RES_ALLOC && |
Clemens Ladisch | e71084a | 2011-01-22 15:05:03 +0100 | [diff] [blame] | 1239 | time_before64(get_jiffies_64(), |
| 1240 | client->device->card->reset_jiffies + HZ)) { |
Stefan Richter | 9fb551b | 2009-10-08 00:41:10 +0200 | [diff] [blame] | 1241 | schedule_iso_resource(r, DIV_ROUND_UP(HZ, 3)); |
Jay Fenlason, Stefan Richter | b1bda4c | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 1242 | skip = true; |
| 1243 | } else { |
| 1244 | /* We could be called twice within the same generation. */ |
| 1245 | skip = todo == ISO_RES_REALLOC && |
| 1246 | r->generation == generation; |
| 1247 | } |
Stefan Richter | 1ec3c02 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 1248 | free = todo == ISO_RES_DEALLOC || |
| 1249 | todo == ISO_RES_ALLOC_ONCE || |
| 1250 | todo == ISO_RES_DEALLOC_ONCE; |
Jay Fenlason, Stefan Richter | b1bda4c | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 1251 | r->generation = generation; |
| 1252 | spin_unlock_irq(&client->lock); |
| 1253 | |
| 1254 | if (skip) |
| 1255 | goto out; |
| 1256 | |
| 1257 | bandwidth = r->bandwidth; |
| 1258 | |
| 1259 | fw_iso_resource_manage(client->device->card, generation, |
| 1260 | r->channels, &channel, &bandwidth, |
Stefan Richter | 1ec3c02 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 1261 | todo == ISO_RES_ALLOC || |
| 1262 | todo == ISO_RES_REALLOC || |
Stefan Richter | f30e6d3 | 2011-04-22 15:13:54 +0200 | [diff] [blame] | 1263 | todo == ISO_RES_ALLOC_ONCE); |
Jay Fenlason, Stefan Richter | b1bda4c | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 1264 | /* |
| 1265 | * Is this generation outdated already? As long as this resource sticks |
| 1266 | * in the idr, it will be scheduled again for a newer generation or at |
| 1267 | * shutdown. |
| 1268 | */ |
| 1269 | if (channel == -EAGAIN && |
| 1270 | (todo == ISO_RES_ALLOC || todo == ISO_RES_REALLOC)) |
| 1271 | goto out; |
| 1272 | |
| 1273 | success = channel >= 0 || bandwidth > 0; |
| 1274 | |
| 1275 | spin_lock_irq(&client->lock); |
| 1276 | /* |
| 1277 | * Transit from allocation to reallocation, except if the client |
| 1278 | * requested deallocation in the meantime. |
| 1279 | */ |
| 1280 | if (r->todo == ISO_RES_ALLOC) |
| 1281 | r->todo = ISO_RES_REALLOC; |
| 1282 | /* |
| 1283 | * Allocation or reallocation failure? Pull this resource out of the |
| 1284 | * idr and prepare for deletion, unless the client is shutting down. |
| 1285 | */ |
| 1286 | if (r->todo == ISO_RES_REALLOC && !success && |
| 1287 | !client->in_shutdown && |
| 1288 | idr_find(&client->resource_idr, r->resource.handle)) { |
| 1289 | idr_remove(&client->resource_idr, r->resource.handle); |
| 1290 | client_put(client); |
| 1291 | free = true; |
| 1292 | } |
| 1293 | spin_unlock_irq(&client->lock); |
| 1294 | |
| 1295 | if (todo == ISO_RES_ALLOC && channel >= 0) |
Stefan Richter | 5d9cb7d | 2009-01-08 23:07:40 +0100 | [diff] [blame] | 1296 | r->channels = 1ULL << channel; |
Jay Fenlason, Stefan Richter | b1bda4c | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 1297 | |
| 1298 | if (todo == ISO_RES_REALLOC && success) |
| 1299 | goto out; |
| 1300 | |
Stefan Richter | 1ec3c02 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 1301 | if (todo == ISO_RES_ALLOC || todo == ISO_RES_ALLOC_ONCE) { |
Jay Fenlason, Stefan Richter | b1bda4c | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 1302 | e = r->e_alloc; |
| 1303 | r->e_alloc = NULL; |
| 1304 | } else { |
| 1305 | e = r->e_dealloc; |
| 1306 | r->e_dealloc = NULL; |
| 1307 | } |
Stefan Richter | e21fcf7 | 2009-10-08 00:41:38 +0200 | [diff] [blame] | 1308 | e->iso_resource.handle = r->resource.handle; |
| 1309 | e->iso_resource.channel = channel; |
| 1310 | e->iso_resource.bandwidth = bandwidth; |
Jay Fenlason, Stefan Richter | b1bda4c | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 1311 | |
| 1312 | queue_event(client, &e->event, |
Stefan Richter | e21fcf7 | 2009-10-08 00:41:38 +0200 | [diff] [blame] | 1313 | &e->iso_resource, sizeof(e->iso_resource), NULL, 0); |
Jay Fenlason, Stefan Richter | b1bda4c | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 1314 | |
| 1315 | if (free) { |
| 1316 | cancel_delayed_work(&r->work); |
| 1317 | kfree(r->e_alloc); |
| 1318 | kfree(r->e_dealloc); |
| 1319 | kfree(r); |
| 1320 | } |
| 1321 | out: |
| 1322 | client_put(client); |
| 1323 | } |
| 1324 | |
Jay Fenlason, Stefan Richter | b1bda4c | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 1325 | static void release_iso_resource(struct client *client, |
| 1326 | struct client_resource *resource) |
| 1327 | { |
| 1328 | struct iso_resource *r = |
| 1329 | container_of(resource, struct iso_resource, resource); |
| 1330 | |
| 1331 | spin_lock_irq(&client->lock); |
| 1332 | r->todo = ISO_RES_DEALLOC; |
Stefan Richter | 9fb551b | 2009-10-08 00:41:10 +0200 | [diff] [blame] | 1333 | schedule_iso_resource(r, 0); |
Jay Fenlason, Stefan Richter | b1bda4c | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 1334 | spin_unlock_irq(&client->lock); |
| 1335 | } |
| 1336 | |
Stefan Richter | 1ec3c02 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 1337 | static int init_iso_resource(struct client *client, |
| 1338 | struct fw_cdev_allocate_iso_resource *request, int todo) |
Jay Fenlason, Stefan Richter | b1bda4c | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 1339 | { |
Jay Fenlason, Stefan Richter | b1bda4c | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 1340 | struct iso_resource_event *e1, *e2; |
| 1341 | struct iso_resource *r; |
| 1342 | int ret; |
| 1343 | |
| 1344 | if ((request->channels == 0 && request->bandwidth == 0) || |
| 1345 | request->bandwidth > BANDWIDTH_AVAILABLE_INITIAL || |
| 1346 | request->bandwidth < 0) |
| 1347 | return -EINVAL; |
| 1348 | |
| 1349 | r = kmalloc(sizeof(*r), GFP_KERNEL); |
| 1350 | e1 = kmalloc(sizeof(*e1), GFP_KERNEL); |
| 1351 | e2 = kmalloc(sizeof(*e2), GFP_KERNEL); |
| 1352 | if (r == NULL || e1 == NULL || e2 == NULL) { |
| 1353 | ret = -ENOMEM; |
| 1354 | goto fail; |
| 1355 | } |
| 1356 | |
| 1357 | INIT_DELAYED_WORK(&r->work, iso_resource_work); |
| 1358 | r->client = client; |
Stefan Richter | 1ec3c02 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 1359 | r->todo = todo; |
Jay Fenlason, Stefan Richter | b1bda4c | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 1360 | r->generation = -1; |
| 1361 | r->channels = request->channels; |
| 1362 | r->bandwidth = request->bandwidth; |
| 1363 | r->e_alloc = e1; |
| 1364 | r->e_dealloc = e2; |
| 1365 | |
Stefan Richter | e21fcf7 | 2009-10-08 00:41:38 +0200 | [diff] [blame] | 1366 | e1->iso_resource.closure = request->closure; |
| 1367 | e1->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED; |
| 1368 | e2->iso_resource.closure = request->closure; |
| 1369 | e2->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED; |
Jay Fenlason, Stefan Richter | b1bda4c | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 1370 | |
Stefan Richter | 1ec3c02 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 1371 | if (todo == ISO_RES_ALLOC) { |
| 1372 | r->resource.release = release_iso_resource; |
| 1373 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); |
Stefan Richter | 81610b8 | 2009-01-11 13:44:46 +0100 | [diff] [blame] | 1374 | if (ret < 0) |
| 1375 | goto fail; |
Stefan Richter | 1ec3c02 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 1376 | } else { |
| 1377 | r->resource.release = NULL; |
| 1378 | r->resource.handle = -1; |
Stefan Richter | 9fb551b | 2009-10-08 00:41:10 +0200 | [diff] [blame] | 1379 | schedule_iso_resource(r, 0); |
Stefan Richter | 1ec3c02 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 1380 | } |
Jay Fenlason, Stefan Richter | b1bda4c | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 1381 | request->handle = r->resource.handle; |
| 1382 | |
| 1383 | return 0; |
| 1384 | fail: |
| 1385 | kfree(r); |
| 1386 | kfree(e1); |
| 1387 | kfree(e2); |
| 1388 | |
| 1389 | return ret; |
| 1390 | } |
| 1391 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1392 | static int ioctl_allocate_iso_resource(struct client *client, |
| 1393 | union ioctl_arg *arg) |
Stefan Richter | 1ec3c02 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 1394 | { |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1395 | return init_iso_resource(client, |
| 1396 | &arg->allocate_iso_resource, ISO_RES_ALLOC); |
Stefan Richter | 1ec3c02 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 1397 | } |
| 1398 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1399 | static int ioctl_deallocate_iso_resource(struct client *client, |
| 1400 | union ioctl_arg *arg) |
Jay Fenlason, Stefan Richter | b1bda4c | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 1401 | { |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1402 | return release_client_resource(client, |
| 1403 | arg->deallocate.handle, release_iso_resource, NULL); |
Jay Fenlason, Stefan Richter | b1bda4c | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 1404 | } |
| 1405 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1406 | static int ioctl_allocate_iso_resource_once(struct client *client, |
| 1407 | union ioctl_arg *arg) |
Stefan Richter | 1ec3c02 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 1408 | { |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1409 | return init_iso_resource(client, |
| 1410 | &arg->allocate_iso_resource, ISO_RES_ALLOC_ONCE); |
Stefan Richter | 1ec3c02 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 1411 | } |
| 1412 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1413 | static int ioctl_deallocate_iso_resource_once(struct client *client, |
| 1414 | union ioctl_arg *arg) |
Stefan Richter | 1ec3c02 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 1415 | { |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1416 | return init_iso_resource(client, |
| 1417 | &arg->allocate_iso_resource, ISO_RES_DEALLOC_ONCE); |
Stefan Richter | 1ec3c02 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 1418 | } |
| 1419 | |
Stefan Richter | c8a2590 | 2009-03-10 20:59:16 +0100 | [diff] [blame] | 1420 | /* |
| 1421 | * Returns a speed code: Maximum speed to or from this device, |
| 1422 | * limited by the device's link speed, the local node's link speed, |
| 1423 | * and all PHY port speeds between the two links. |
| 1424 | */ |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1425 | static int ioctl_get_speed(struct client *client, union ioctl_arg *arg) |
Stefan Richter | 33580a3 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 1426 | { |
Stefan Richter | c8a2590 | 2009-03-10 20:59:16 +0100 | [diff] [blame] | 1427 | return client->device->max_speed; |
Stefan Richter | 33580a3 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 1428 | } |
| 1429 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1430 | static int ioctl_send_broadcast_request(struct client *client, |
| 1431 | union ioctl_arg *arg) |
Jay Fenlason, Stefan Richter | acfe833 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 1432 | { |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1433 | struct fw_cdev_send_request *a = &arg->send_request; |
Jay Fenlason, Stefan Richter | acfe833 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 1434 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1435 | switch (a->tcode) { |
Jay Fenlason, Stefan Richter | acfe833 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 1436 | case TCODE_WRITE_QUADLET_REQUEST: |
| 1437 | case TCODE_WRITE_BLOCK_REQUEST: |
| 1438 | break; |
| 1439 | default: |
| 1440 | return -EINVAL; |
| 1441 | } |
| 1442 | |
Stefan Richter | 1566f3d | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 1443 | /* Security policy: Only allow accesses to Units Space. */ |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1444 | if (a->offset < CSR_REGISTER_BASE + CSR_CONFIG_ROM_END) |
Stefan Richter | 1566f3d | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 1445 | return -EACCES; |
| 1446 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1447 | return init_request(client, a, LOCAL_BUS | 0x3f, SCODE_100); |
Jay Fenlason, Stefan Richter | acfe833 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 1448 | } |
| 1449 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1450 | static int ioctl_send_stream_packet(struct client *client, union ioctl_arg *arg) |
Jay Fenlason | f8c2287 | 2009-03-05 19:08:40 +0100 | [diff] [blame] | 1451 | { |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1452 | struct fw_cdev_send_stream_packet *a = &arg->send_stream_packet; |
Stefan Richter | 18e9b10 | 2009-03-10 21:02:21 +0100 | [diff] [blame] | 1453 | struct fw_cdev_send_request request; |
| 1454 | int dest; |
Jay Fenlason | f8c2287 | 2009-03-05 19:08:40 +0100 | [diff] [blame] | 1455 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1456 | if (a->speed > client->device->card->link_speed || |
| 1457 | a->length > 1024 << a->speed) |
Stefan Richter | 18e9b10 | 2009-03-10 21:02:21 +0100 | [diff] [blame] | 1458 | return -EIO; |
Jay Fenlason | f8c2287 | 2009-03-05 19:08:40 +0100 | [diff] [blame] | 1459 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1460 | if (a->tag > 3 || a->channel > 63 || a->sy > 15) |
Stefan Richter | 18e9b10 | 2009-03-10 21:02:21 +0100 | [diff] [blame] | 1461 | return -EINVAL; |
| 1462 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1463 | dest = fw_stream_packet_destination_id(a->tag, a->channel, a->sy); |
Stefan Richter | 18e9b10 | 2009-03-10 21:02:21 +0100 | [diff] [blame] | 1464 | request.tcode = TCODE_STREAM_DATA; |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1465 | request.length = a->length; |
| 1466 | request.closure = a->closure; |
| 1467 | request.data = a->data; |
| 1468 | request.generation = a->generation; |
Stefan Richter | 18e9b10 | 2009-03-10 21:02:21 +0100 | [diff] [blame] | 1469 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1470 | return init_request(client, &request, dest, a->speed); |
Jay Fenlason | f8c2287 | 2009-03-05 19:08:40 +0100 | [diff] [blame] | 1471 | } |
| 1472 | |
Stefan Richter | 850bb6f | 2010-07-16 22:25:14 +0200 | [diff] [blame] | 1473 | static void outbound_phy_packet_callback(struct fw_packet *packet, |
| 1474 | struct fw_card *card, int status) |
| 1475 | { |
| 1476 | struct outbound_phy_packet_event *e = |
| 1477 | container_of(packet, struct outbound_phy_packet_event, p); |
| 1478 | |
| 1479 | switch (status) { |
| 1480 | /* expected: */ |
| 1481 | case ACK_COMPLETE: e->phy_packet.rcode = RCODE_COMPLETE; break; |
| 1482 | /* should never happen with PHY packets: */ |
| 1483 | case ACK_PENDING: e->phy_packet.rcode = RCODE_COMPLETE; break; |
| 1484 | case ACK_BUSY_X: |
| 1485 | case ACK_BUSY_A: |
| 1486 | case ACK_BUSY_B: e->phy_packet.rcode = RCODE_BUSY; break; |
| 1487 | case ACK_DATA_ERROR: e->phy_packet.rcode = RCODE_DATA_ERROR; break; |
| 1488 | case ACK_TYPE_ERROR: e->phy_packet.rcode = RCODE_TYPE_ERROR; break; |
| 1489 | /* stale generation; cancelled; on certain controllers: no ack */ |
| 1490 | default: e->phy_packet.rcode = status; break; |
| 1491 | } |
Stefan Richter | cc55021 | 2010-07-18 13:00:50 +0200 | [diff] [blame] | 1492 | e->phy_packet.data[0] = packet->timestamp; |
Stefan Richter | 850bb6f | 2010-07-16 22:25:14 +0200 | [diff] [blame] | 1493 | |
Stefan Richter | cc55021 | 2010-07-18 13:00:50 +0200 | [diff] [blame] | 1494 | queue_event(e->client, &e->event, &e->phy_packet, |
| 1495 | sizeof(e->phy_packet) + e->phy_packet.length, NULL, 0); |
Stefan Richter | 850bb6f | 2010-07-16 22:25:14 +0200 | [diff] [blame] | 1496 | client_put(e->client); |
| 1497 | } |
| 1498 | |
| 1499 | static int ioctl_send_phy_packet(struct client *client, union ioctl_arg *arg) |
| 1500 | { |
| 1501 | struct fw_cdev_send_phy_packet *a = &arg->send_phy_packet; |
| 1502 | struct fw_card *card = client->device->card; |
| 1503 | struct outbound_phy_packet_event *e; |
| 1504 | |
| 1505 | /* Access policy: Allow this ioctl only on local nodes' device files. */ |
| 1506 | if (!client->device->is_local) |
| 1507 | return -ENOSYS; |
| 1508 | |
Stefan Richter | cc55021 | 2010-07-18 13:00:50 +0200 | [diff] [blame] | 1509 | e = kzalloc(sizeof(*e) + 4, GFP_KERNEL); |
Stefan Richter | 850bb6f | 2010-07-16 22:25:14 +0200 | [diff] [blame] | 1510 | if (e == NULL) |
| 1511 | return -ENOMEM; |
| 1512 | |
| 1513 | client_get(client); |
| 1514 | e->client = client; |
| 1515 | e->p.speed = SCODE_100; |
| 1516 | e->p.generation = a->generation; |
Clemens Ladisch | 5b06db1 | 2010-11-30 08:24:47 +0100 | [diff] [blame] | 1517 | e->p.header[0] = TCODE_LINK_INTERNAL << 4; |
| 1518 | e->p.header[1] = a->data[0]; |
| 1519 | e->p.header[2] = a->data[1]; |
| 1520 | e->p.header_length = 12; |
Stefan Richter | 850bb6f | 2010-07-16 22:25:14 +0200 | [diff] [blame] | 1521 | e->p.callback = outbound_phy_packet_callback; |
| 1522 | e->phy_packet.closure = a->closure; |
| 1523 | e->phy_packet.type = FW_CDEV_EVENT_PHY_PACKET_SENT; |
Stefan Richter | cc55021 | 2010-07-18 13:00:50 +0200 | [diff] [blame] | 1524 | if (is_ping_packet(a->data)) |
| 1525 | e->phy_packet.length = 4; |
Stefan Richter | 850bb6f | 2010-07-16 22:25:14 +0200 | [diff] [blame] | 1526 | |
| 1527 | card->driver->send_request(card, &e->p); |
| 1528 | |
| 1529 | return 0; |
| 1530 | } |
| 1531 | |
Stefan Richter | bf54e14 | 2010-07-16 22:25:51 +0200 | [diff] [blame] | 1532 | static int ioctl_receive_phy_packets(struct client *client, union ioctl_arg *arg) |
| 1533 | { |
| 1534 | struct fw_cdev_receive_phy_packets *a = &arg->receive_phy_packets; |
| 1535 | struct fw_card *card = client->device->card; |
| 1536 | |
| 1537 | /* Access policy: Allow this ioctl only on local nodes' device files. */ |
| 1538 | if (!client->device->is_local) |
| 1539 | return -ENOSYS; |
| 1540 | |
| 1541 | spin_lock_irq(&card->lock); |
| 1542 | |
| 1543 | list_move_tail(&client->phy_receiver_link, &card->phy_receiver_list); |
| 1544 | client->phy_receiver_closure = a->closure; |
| 1545 | |
| 1546 | spin_unlock_irq(&card->lock); |
| 1547 | |
| 1548 | return 0; |
| 1549 | } |
| 1550 | |
| 1551 | void fw_cdev_handle_phy_packet(struct fw_card *card, struct fw_packet *p) |
| 1552 | { |
| 1553 | struct client *client; |
| 1554 | struct inbound_phy_packet_event *e; |
| 1555 | unsigned long flags; |
| 1556 | |
| 1557 | spin_lock_irqsave(&card->lock, flags); |
| 1558 | |
| 1559 | list_for_each_entry(client, &card->phy_receiver_list, phy_receiver_link) { |
| 1560 | e = kmalloc(sizeof(*e) + 8, GFP_ATOMIC); |
| 1561 | if (e == NULL) { |
Stefan Richter | 26b4950 | 2012-02-18 22:03:14 +0100 | [diff] [blame] | 1562 | fw_notice(card, "out of memory when allocating event\n"); |
Stefan Richter | bf54e14 | 2010-07-16 22:25:51 +0200 | [diff] [blame] | 1563 | break; |
| 1564 | } |
| 1565 | e->phy_packet.closure = client->phy_receiver_closure; |
| 1566 | e->phy_packet.type = FW_CDEV_EVENT_PHY_PACKET_RECEIVED; |
| 1567 | e->phy_packet.rcode = RCODE_COMPLETE; |
| 1568 | e->phy_packet.length = 8; |
| 1569 | e->phy_packet.data[0] = p->header[1]; |
| 1570 | e->phy_packet.data[1] = p->header[2]; |
| 1571 | queue_event(client, &e->event, |
| 1572 | &e->phy_packet, sizeof(e->phy_packet) + 8, NULL, 0); |
| 1573 | } |
| 1574 | |
| 1575 | spin_unlock_irqrestore(&card->lock, flags); |
| 1576 | } |
| 1577 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1578 | static int (* const ioctl_handlers[])(struct client *, union ioctl_arg *) = { |
Stefan Richter | b9dc61c | 2010-07-16 22:24:29 +0200 | [diff] [blame] | 1579 | [0x00] = ioctl_get_info, |
| 1580 | [0x01] = ioctl_send_request, |
| 1581 | [0x02] = ioctl_allocate, |
| 1582 | [0x03] = ioctl_deallocate, |
| 1583 | [0x04] = ioctl_send_response, |
| 1584 | [0x05] = ioctl_initiate_bus_reset, |
| 1585 | [0x06] = ioctl_add_descriptor, |
| 1586 | [0x07] = ioctl_remove_descriptor, |
| 1587 | [0x08] = ioctl_create_iso_context, |
| 1588 | [0x09] = ioctl_queue_iso, |
| 1589 | [0x0a] = ioctl_start_iso, |
| 1590 | [0x0b] = ioctl_stop_iso, |
| 1591 | [0x0c] = ioctl_get_cycle_timer, |
| 1592 | [0x0d] = ioctl_allocate_iso_resource, |
| 1593 | [0x0e] = ioctl_deallocate_iso_resource, |
| 1594 | [0x0f] = ioctl_allocate_iso_resource_once, |
| 1595 | [0x10] = ioctl_deallocate_iso_resource_once, |
| 1596 | [0x11] = ioctl_get_speed, |
| 1597 | [0x12] = ioctl_send_broadcast_request, |
| 1598 | [0x13] = ioctl_send_stream_packet, |
| 1599 | [0x14] = ioctl_get_cycle_timer2, |
Stefan Richter | 850bb6f | 2010-07-16 22:25:14 +0200 | [diff] [blame] | 1600 | [0x15] = ioctl_send_phy_packet, |
Stefan Richter | bf54e14 | 2010-07-16 22:25:51 +0200 | [diff] [blame] | 1601 | [0x16] = ioctl_receive_phy_packets, |
Stefan Richter | 872e330 | 2010-07-29 18:19:22 +0200 | [diff] [blame] | 1602 | [0x17] = ioctl_set_iso_channels, |
Clemens Ladisch | d1bbd20 | 2012-03-18 19:06:39 +0100 | [diff] [blame] | 1603 | [0x18] = ioctl_flush_iso, |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 1604 | }; |
| 1605 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 1606 | static int dispatch_ioctl(struct client *client, |
| 1607 | unsigned int cmd, void __user *arg) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1608 | { |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1609 | union ioctl_arg buffer; |
Stefan Richter | 2dbd7d7 | 2008-12-14 21:45:45 +0100 | [diff] [blame] | 1610 | int ret; |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 1611 | |
Stefan Richter | 6458229 | 2010-02-21 17:56:42 +0100 | [diff] [blame] | 1612 | if (fw_device_is_shutdown(client->device)) |
| 1613 | return -ENODEV; |
| 1614 | |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 1615 | if (_IOC_TYPE(cmd) != '#' || |
Stefan Richter | 9cac00b | 2010-04-07 08:30:50 +0200 | [diff] [blame] | 1616 | _IOC_NR(cmd) >= ARRAY_SIZE(ioctl_handlers) || |
| 1617 | _IOC_SIZE(cmd) > sizeof(buffer)) |
Stefan Richter | d873d79 | 2011-07-09 16:42:26 +0200 | [diff] [blame] | 1618 | return -ENOTTY; |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 1619 | |
Stefan Richter | 9cac00b | 2010-04-07 08:30:50 +0200 | [diff] [blame] | 1620 | if (_IOC_DIR(cmd) == _IOC_READ) |
| 1621 | memset(&buffer, 0, _IOC_SIZE(cmd)); |
| 1622 | |
| 1623 | if (_IOC_DIR(cmd) & _IOC_WRITE) |
| 1624 | if (copy_from_user(&buffer, arg, _IOC_SIZE(cmd))) |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 1625 | return -EFAULT; |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 1626 | |
Stefan Richter | 6e95dea | 2010-02-21 17:56:21 +0100 | [diff] [blame] | 1627 | ret = ioctl_handlers[_IOC_NR(cmd)](client, &buffer); |
Stefan Richter | 2dbd7d7 | 2008-12-14 21:45:45 +0100 | [diff] [blame] | 1628 | if (ret < 0) |
| 1629 | return ret; |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 1630 | |
Stefan Richter | 9cac00b | 2010-04-07 08:30:50 +0200 | [diff] [blame] | 1631 | if (_IOC_DIR(cmd) & _IOC_READ) |
| 1632 | if (copy_to_user(arg, &buffer, _IOC_SIZE(cmd))) |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 1633 | return -EFAULT; |
Kristian Høgsberg | 4f25922 | 2007-04-30 15:03:13 -0400 | [diff] [blame] | 1634 | |
Stefan Richter | 2dbd7d7 | 2008-12-14 21:45:45 +0100 | [diff] [blame] | 1635 | return ret; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1636 | } |
| 1637 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 1638 | static long fw_device_op_ioctl(struct file *file, |
| 1639 | unsigned int cmd, unsigned long arg) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1640 | { |
Stefan Richter | 6458229 | 2010-02-21 17:56:42 +0100 | [diff] [blame] | 1641 | return dispatch_ioctl(file->private_data, cmd, (void __user *)arg); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1642 | } |
| 1643 | |
| 1644 | #ifdef CONFIG_COMPAT |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 1645 | static long fw_device_op_compat_ioctl(struct file *file, |
| 1646 | unsigned int cmd, unsigned long arg) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1647 | { |
Stefan Richter | 6458229 | 2010-02-21 17:56:42 +0100 | [diff] [blame] | 1648 | return dispatch_ioctl(file->private_data, cmd, compat_ptr(arg)); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1649 | } |
| 1650 | #endif |
| 1651 | |
| 1652 | static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma) |
| 1653 | { |
| 1654 | struct client *client = file->private_data; |
Kristian Høgsberg | 9aad812 | 2007-02-16 17:34:38 -0500 | [diff] [blame] | 1655 | enum dma_data_direction direction; |
| 1656 | unsigned long size; |
Stefan Richter | 2dbd7d7 | 2008-12-14 21:45:45 +0100 | [diff] [blame] | 1657 | int page_count, ret; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1658 | |
Jay Fenlason | 551f4cb | 2008-05-16 11:15:23 -0400 | [diff] [blame] | 1659 | if (fw_device_is_shutdown(client->device)) |
| 1660 | return -ENODEV; |
| 1661 | |
Kristian Høgsberg | 9aad812 | 2007-02-16 17:34:38 -0500 | [diff] [blame] | 1662 | /* FIXME: We could support multiple buffers, but we don't. */ |
| 1663 | if (client->buffer.pages != NULL) |
| 1664 | return -EBUSY; |
| 1665 | |
| 1666 | if (!(vma->vm_flags & VM_SHARED)) |
| 1667 | return -EINVAL; |
| 1668 | |
| 1669 | if (vma->vm_start & ~PAGE_MASK) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1670 | return -EINVAL; |
| 1671 | |
| 1672 | client->vm_start = vma->vm_start; |
Kristian Høgsberg | 9aad812 | 2007-02-16 17:34:38 -0500 | [diff] [blame] | 1673 | size = vma->vm_end - vma->vm_start; |
| 1674 | page_count = size >> PAGE_SHIFT; |
| 1675 | if (size & ~PAGE_MASK) |
| 1676 | return -EINVAL; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1677 | |
Kristian Høgsberg | 9aad812 | 2007-02-16 17:34:38 -0500 | [diff] [blame] | 1678 | if (vma->vm_flags & VM_WRITE) |
| 1679 | direction = DMA_TO_DEVICE; |
| 1680 | else |
| 1681 | direction = DMA_FROM_DEVICE; |
| 1682 | |
Stefan Richter | 2dbd7d7 | 2008-12-14 21:45:45 +0100 | [diff] [blame] | 1683 | ret = fw_iso_buffer_init(&client->buffer, client->device->card, |
| 1684 | page_count, direction); |
| 1685 | if (ret < 0) |
| 1686 | return ret; |
Kristian Høgsberg | 9aad812 | 2007-02-16 17:34:38 -0500 | [diff] [blame] | 1687 | |
Stefan Richter | 2dbd7d7 | 2008-12-14 21:45:45 +0100 | [diff] [blame] | 1688 | ret = fw_iso_buffer_map(&client->buffer, vma); |
| 1689 | if (ret < 0) |
Kristian Høgsberg | 9aad812 | 2007-02-16 17:34:38 -0500 | [diff] [blame] | 1690 | fw_iso_buffer_destroy(&client->buffer, client->device->card); |
| 1691 | |
Stefan Richter | 2dbd7d7 | 2008-12-14 21:45:45 +0100 | [diff] [blame] | 1692 | return ret; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1693 | } |
| 1694 | |
Clemens Ladisch | 5a5e62d | 2011-01-10 17:28:39 +0100 | [diff] [blame] | 1695 | static int is_outbound_transaction_resource(int id, void *p, void *data) |
| 1696 | { |
| 1697 | struct client_resource *resource = p; |
| 1698 | |
| 1699 | return resource->release == release_transaction; |
| 1700 | } |
| 1701 | |
| 1702 | static int has_outbound_transactions(struct client *client) |
| 1703 | { |
| 1704 | int ret; |
| 1705 | |
| 1706 | spin_lock_irq(&client->lock); |
| 1707 | ret = idr_for_each(&client->resource_idr, |
| 1708 | is_outbound_transaction_resource, NULL); |
| 1709 | spin_unlock_irq(&client->lock); |
| 1710 | |
| 1711 | return ret; |
| 1712 | } |
| 1713 | |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame] | 1714 | static int shutdown_resource(int id, void *p, void *data) |
| 1715 | { |
Stefan Richter | e21fcf7 | 2009-10-08 00:41:38 +0200 | [diff] [blame] | 1716 | struct client_resource *resource = p; |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame] | 1717 | struct client *client = data; |
| 1718 | |
Stefan Richter | e21fcf7 | 2009-10-08 00:41:38 +0200 | [diff] [blame] | 1719 | resource->release(client, resource); |
Stefan Richter | fb44303 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 1720 | client_put(client); |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame] | 1721 | |
| 1722 | return 0; |
| 1723 | } |
| 1724 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1725 | static int fw_device_op_release(struct inode *inode, struct file *file) |
| 1726 | { |
| 1727 | struct client *client = file->private_data; |
Stefan Richter | e21fcf7 | 2009-10-08 00:41:38 +0200 | [diff] [blame] | 1728 | struct event *event, *next_event; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1729 | |
Stefan Richter | bf54e14 | 2010-07-16 22:25:51 +0200 | [diff] [blame] | 1730 | spin_lock_irq(&client->device->card->lock); |
| 1731 | list_del(&client->phy_receiver_link); |
| 1732 | spin_unlock_irq(&client->device->card->lock); |
| 1733 | |
Stefan Richter | 97811e3 | 2008-12-14 19:19:23 +0100 | [diff] [blame] | 1734 | mutex_lock(&client->device->client_list_mutex); |
| 1735 | list_del(&client->link); |
| 1736 | mutex_unlock(&client->device->client_list_mutex); |
| 1737 | |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1738 | if (client->iso_context) |
| 1739 | fw_iso_context_destroy(client->iso_context); |
| 1740 | |
Stefan Richter | 36a755c | 2009-01-05 20:28:10 +0100 | [diff] [blame] | 1741 | if (client->buffer.pages) |
| 1742 | fw_iso_buffer_destroy(&client->buffer, client->device->card); |
| 1743 | |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame] | 1744 | /* Freeze client->resource_idr and client->event_list */ |
Stefan Richter | 3ba9498 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 1745 | spin_lock_irq(&client->lock); |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame] | 1746 | client->in_shutdown = true; |
Stefan Richter | 3ba9498 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 1747 | spin_unlock_irq(&client->lock); |
Kristian Høgsberg | 66dea3e | 2007-03-28 21:26:42 +0200 | [diff] [blame] | 1748 | |
Clemens Ladisch | 5a5e62d | 2011-01-10 17:28:39 +0100 | [diff] [blame] | 1749 | wait_event(client->tx_flush_wait, !has_outbound_transactions(client)); |
| 1750 | |
Jay Fenlason | 45ee319 | 2008-12-21 16:47:17 +0100 | [diff] [blame] | 1751 | idr_for_each(&client->resource_idr, shutdown_resource, client); |
| 1752 | idr_remove_all(&client->resource_idr); |
| 1753 | idr_destroy(&client->resource_idr); |
Kristian Høgsberg | 28cf6a0 | 2007-03-07 12:12:50 -0500 | [diff] [blame] | 1754 | |
Stefan Richter | e21fcf7 | 2009-10-08 00:41:38 +0200 | [diff] [blame] | 1755 | list_for_each_entry_safe(event, next_event, &client->event_list, link) |
| 1756 | kfree(event); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1757 | |
Stefan Richter | fb44303 | 2009-01-04 16:23:29 +0100 | [diff] [blame] | 1758 | client_put(client); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1759 | |
| 1760 | return 0; |
| 1761 | } |
| 1762 | |
| 1763 | static unsigned int fw_device_op_poll(struct file *file, poll_table * pt) |
| 1764 | { |
| 1765 | struct client *client = file->private_data; |
Kristian Høgsberg | 2603bf2 | 2007-03-07 12:12:48 -0500 | [diff] [blame] | 1766 | unsigned int mask = 0; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1767 | |
| 1768 | poll_wait(file, &client->wait, pt); |
| 1769 | |
Kristian Høgsberg | 2603bf2 | 2007-03-07 12:12:48 -0500 | [diff] [blame] | 1770 | if (fw_device_is_shutdown(client->device)) |
| 1771 | mask |= POLLHUP | POLLERR; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1772 | if (!list_empty(&client->event_list)) |
Kristian Høgsberg | 2603bf2 | 2007-03-07 12:12:48 -0500 | [diff] [blame] | 1773 | mask |= POLLIN | POLLRDNORM; |
| 1774 | |
| 1775 | return mask; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1776 | } |
| 1777 | |
Stefan Richter | 21ebcd1 | 2007-01-14 15:29:07 +0100 | [diff] [blame] | 1778 | const struct file_operations fw_device_ops = { |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1779 | .owner = THIS_MODULE, |
Stefan Richter | 3ac26b2 | 2010-04-10 16:38:05 +0100 | [diff] [blame] | 1780 | .llseek = no_llseek, |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1781 | .open = fw_device_op_open, |
| 1782 | .read = fw_device_op_read, |
| 1783 | .unlocked_ioctl = fw_device_op_ioctl, |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1784 | .mmap = fw_device_op_mmap, |
Stefan Richter | 3ac26b2 | 2010-04-10 16:38:05 +0100 | [diff] [blame] | 1785 | .release = fw_device_op_release, |
| 1786 | .poll = fw_device_op_poll, |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1787 | #ifdef CONFIG_COMPAT |
Stefan Richter | 5af4e5e | 2007-01-21 20:45:32 +0100 | [diff] [blame] | 1788 | .compat_ioctl = fw_device_op_compat_ioctl, |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 1789 | #endif |
| 1790 | }; |