Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* ------------------------------------------------------------ |
| 2 | * ibmvscsi.c |
| 3 | * (C) Copyright IBM Corporation 1994, 2004 |
| 4 | * Authors: Colin DeVilbiss (devilbis@us.ibm.com) |
| 5 | * Santiago Leon (santil@us.ibm.com) |
| 6 | * Dave Boutcher (sleddog@us.ibm.com) |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
| 21 | * USA |
| 22 | * |
| 23 | * ------------------------------------------------------------ |
| 24 | * Emulation of a SCSI host adapter for Virtual I/O devices |
| 25 | * |
| 26 | * This driver supports the SCSI adapter implemented by the IBM |
| 27 | * Power5 firmware. That SCSI adapter is not a physical adapter, |
| 28 | * but allows Linux SCSI peripheral drivers to directly |
| 29 | * access devices in another logical partition on the physical system. |
| 30 | * |
| 31 | * The virtual adapter(s) are present in the open firmware device |
| 32 | * tree just like real adapters. |
| 33 | * |
| 34 | * One of the capabilities provided on these systems is the ability |
| 35 | * to DMA between partitions. The architecture states that for VSCSI, |
| 36 | * the server side is allowed to DMA to and from the client. The client |
| 37 | * is never trusted to DMA to or from the server directly. |
| 38 | * |
| 39 | * Messages are sent between partitions on a "Command/Response Queue" |
| 40 | * (CRQ), which is just a buffer of 16 byte entries in the receiver's |
| 41 | * Senders cannot access the buffer directly, but send messages by |
| 42 | * making a hypervisor call and passing in the 16 bytes. The hypervisor |
Bart Van Assche | 9b7dac0 | 2009-12-04 20:43:37 +0100 | [diff] [blame] | 43 | * puts the message in the next 16 byte space in round-robin fashion, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | * turns on the high order bit of the message (the valid bit), and |
| 45 | * generates an interrupt to the receiver (if interrupts are turned on.) |
| 46 | * The receiver just turns off the valid bit when they have copied out |
| 47 | * the message. |
| 48 | * |
| 49 | * The VSCSI client builds a SCSI Remote Protocol (SRP) Information Unit |
| 50 | * (IU) (as defined in the T10 standard available at www.t10.org), gets |
| 51 | * a DMA address for the message, and sends it to the server as the |
| 52 | * payload of a CRQ message. The server DMAs the SRP IU and processes it, |
| 53 | * including doing any additional data transfers. When it is done, it |
| 54 | * DMAs the SRP response back to the same address as the request came from, |
| 55 | * and sends a CRQ message back to inform the client that the request has |
| 56 | * completed. |
| 57 | * |
| 58 | * Note that some of the underlying infrastructure is different between |
| 59 | * machines conforming to the "RS/6000 Platform Architecture" (RPA) and |
| 60 | * the older iSeries hypervisor models. To support both, some low level |
| 61 | * routines have been broken out into rpa_vscsi.c and iseries_vscsi.c. |
| 62 | * The Makefile should pick one, not two, not zero, of these. |
| 63 | * |
| 64 | * TODO: This is currently pretty tied to the IBM i/pSeries hypervisor |
| 65 | * interfaces. It would be really nice to abstract this above an RDMA |
| 66 | * layer. |
| 67 | */ |
| 68 | |
| 69 | #include <linux/module.h> |
| 70 | #include <linux/moduleparam.h> |
| 71 | #include <linux/dma-mapping.h> |
| 72 | #include <linux/delay.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 73 | #include <linux/slab.h> |
Brian King | 126c5cc | 2009-06-08 16:19:08 -0500 | [diff] [blame] | 74 | #include <linux/of.h> |
Brian King | 64355b9 | 2010-02-21 10:37:57 -0600 | [diff] [blame] | 75 | #include <linux/pm.h> |
David Woodhouse | d3849d5 | 2007-09-22 08:29:36 +1000 | [diff] [blame] | 76 | #include <asm/firmware.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | #include <asm/vio.h> |
| 78 | #include <scsi/scsi.h> |
| 79 | #include <scsi/scsi_cmnd.h> |
| 80 | #include <scsi/scsi_host.h> |
| 81 | #include <scsi/scsi_device.h> |
FUJITA Tomonori | 4d68041 | 2007-06-27 16:32:50 +0900 | [diff] [blame] | 82 | #include <scsi/scsi_transport_srp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | #include "ibmvscsi.h" |
| 84 | |
| 85 | /* The values below are somewhat arbitrary default values, but |
| 86 | * OS/400 will use 3 busses (disks, CDs, tapes, I think.) |
| 87 | * Note that there are 3 bits of channel value, 6 bits of id, and |
| 88 | * 5 bits of LUN. |
| 89 | */ |
| 90 | static int max_id = 64; |
| 91 | static int max_channel = 3; |
Robert Jennings | e1a5ce5 | 2009-06-08 16:19:03 -0500 | [diff] [blame] | 92 | static int init_timeout = 300; |
| 93 | static int login_timeout = 60; |
| 94 | static int info_timeout = 30; |
| 95 | static int abort_timeout = 60; |
| 96 | static int reset_timeout = 60; |
Robert Jennings | a897ff2 | 2007-03-28 12:45:46 -0500 | [diff] [blame] | 97 | static int max_requests = IBMVSCSI_MAX_REQUESTS_DEFAULT; |
Brian King | 4f10aae | 2008-12-17 17:19:33 -0600 | [diff] [blame] | 98 | static int max_events = IBMVSCSI_MAX_REQUESTS_DEFAULT + 2; |
Robert Jennings | c1988e3 | 2009-06-08 16:19:07 -0500 | [diff] [blame] | 99 | static int fast_fail = 1; |
Brian King | 126c5cc | 2009-06-08 16:19:08 -0500 | [diff] [blame] | 100 | static int client_reserve = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | |
FUJITA Tomonori | 4d68041 | 2007-06-27 16:32:50 +0900 | [diff] [blame] | 102 | static struct scsi_transport_template *ibmvscsi_transport_template; |
| 103 | |
Dave C Boutcher | 2b541f8 | 2006-01-19 13:34:44 -0600 | [diff] [blame] | 104 | #define IBMVSCSI_VERSION "1.5.8" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | |
David Woodhouse | d3849d5 | 2007-09-22 08:29:36 +1000 | [diff] [blame] | 106 | static struct ibmvscsi_ops *ibmvscsi_ops; |
| 107 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | MODULE_DESCRIPTION("IBM Virtual SCSI"); |
| 109 | MODULE_AUTHOR("Dave Boutcher"); |
| 110 | MODULE_LICENSE("GPL"); |
| 111 | MODULE_VERSION(IBMVSCSI_VERSION); |
| 112 | |
| 113 | module_param_named(max_id, max_id, int, S_IRUGO | S_IWUSR); |
| 114 | MODULE_PARM_DESC(max_id, "Largest ID value for each channel"); |
| 115 | module_param_named(max_channel, max_channel, int, S_IRUGO | S_IWUSR); |
| 116 | MODULE_PARM_DESC(max_channel, "Largest channel value"); |
| 117 | module_param_named(init_timeout, init_timeout, int, S_IRUGO | S_IWUSR); |
| 118 | MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds"); |
Brian King | 21465ed | 2008-12-08 17:01:47 -0600 | [diff] [blame] | 119 | module_param_named(max_requests, max_requests, int, S_IRUGO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter"); |
Robert Jennings | c1988e3 | 2009-06-08 16:19:07 -0500 | [diff] [blame] | 121 | module_param_named(fast_fail, fast_fail, int, S_IRUGO | S_IWUSR); |
| 122 | MODULE_PARM_DESC(fast_fail, "Enable fast fail. [Default=1]"); |
Brian King | 126c5cc | 2009-06-08 16:19:08 -0500 | [diff] [blame] | 123 | module_param_named(client_reserve, client_reserve, int, S_IRUGO ); |
| 124 | MODULE_PARM_DESC(client_reserve, "Attempt client managed reserve/release"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | |
| 126 | /* ------------------------------------------------------------ |
| 127 | * Routines for the event pool and event structs |
| 128 | */ |
| 129 | /** |
| 130 | * initialize_event_pool: - Allocates and initializes the event pool for a host |
| 131 | * @pool: event_pool to be initialized |
| 132 | * @size: Number of events in pool |
| 133 | * @hostdata: ibmvscsi_host_data who owns the event pool |
| 134 | * |
| 135 | * Returns zero on success. |
| 136 | */ |
| 137 | static int initialize_event_pool(struct event_pool *pool, |
| 138 | int size, struct ibmvscsi_host_data *hostdata) |
| 139 | { |
| 140 | int i; |
| 141 | |
| 142 | pool->size = size; |
| 143 | pool->next = 0; |
FUJITA Tomonori | 4c021dd13 | 2006-04-07 19:10:03 +0900 | [diff] [blame] | 144 | pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | if (!pool->events) |
| 146 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | |
| 148 | pool->iu_storage = |
| 149 | dma_alloc_coherent(hostdata->dev, |
| 150 | pool->size * sizeof(*pool->iu_storage), |
| 151 | &pool->iu_token, 0); |
| 152 | if (!pool->iu_storage) { |
| 153 | kfree(pool->events); |
| 154 | return -ENOMEM; |
| 155 | } |
| 156 | |
| 157 | for (i = 0; i < pool->size; ++i) { |
| 158 | struct srp_event_struct *evt = &pool->events[i]; |
| 159 | memset(&evt->crq, 0x00, sizeof(evt->crq)); |
| 160 | atomic_set(&evt->free, 1); |
| 161 | evt->crq.valid = 0x80; |
| 162 | evt->crq.IU_length = sizeof(*evt->xfer_iu); |
| 163 | evt->crq.IU_data_ptr = pool->iu_token + |
| 164 | sizeof(*evt->xfer_iu) * i; |
| 165 | evt->xfer_iu = pool->iu_storage + i; |
| 166 | evt->hostdata = hostdata; |
James Bottomley | 4dddbc2 | 2005-09-06 17:11:54 -0500 | [diff] [blame] | 167 | evt->ext_list = NULL; |
| 168 | evt->ext_list_token = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | } |
| 170 | |
| 171 | return 0; |
| 172 | } |
| 173 | |
| 174 | /** |
| 175 | * release_event_pool: - Frees memory of an event pool of a host |
| 176 | * @pool: event_pool to be released |
| 177 | * @hostdata: ibmvscsi_host_data who owns the even pool |
| 178 | * |
| 179 | * Returns zero on success. |
| 180 | */ |
| 181 | static void release_event_pool(struct event_pool *pool, |
| 182 | struct ibmvscsi_host_data *hostdata) |
| 183 | { |
| 184 | int i, in_use = 0; |
James Bottomley | 4dddbc2 | 2005-09-06 17:11:54 -0500 | [diff] [blame] | 185 | for (i = 0; i < pool->size; ++i) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | if (atomic_read(&pool->events[i].free) != 1) |
| 187 | ++in_use; |
James Bottomley | 4dddbc2 | 2005-09-06 17:11:54 -0500 | [diff] [blame] | 188 | if (pool->events[i].ext_list) { |
| 189 | dma_free_coherent(hostdata->dev, |
FUJITA Tomonori | ef26567 | 2006-03-26 03:57:14 +0900 | [diff] [blame] | 190 | SG_ALL * sizeof(struct srp_direct_buf), |
James Bottomley | 4dddbc2 | 2005-09-06 17:11:54 -0500 | [diff] [blame] | 191 | pool->events[i].ext_list, |
| 192 | pool->events[i].ext_list_token); |
| 193 | } |
| 194 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | if (in_use) |
Brian King | 6c0a60e | 2007-06-13 17:12:19 -0500 | [diff] [blame] | 196 | dev_warn(hostdata->dev, "releasing event pool with %d " |
| 197 | "events still in use?\n", in_use); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | kfree(pool->events); |
| 199 | dma_free_coherent(hostdata->dev, |
| 200 | pool->size * sizeof(*pool->iu_storage), |
| 201 | pool->iu_storage, pool->iu_token); |
| 202 | } |
| 203 | |
| 204 | /** |
| 205 | * valid_event_struct: - Determines if event is valid. |
| 206 | * @pool: event_pool that contains the event |
| 207 | * @evt: srp_event_struct to be checked for validity |
| 208 | * |
| 209 | * Returns zero if event is invalid, one otherwise. |
| 210 | */ |
| 211 | static int valid_event_struct(struct event_pool *pool, |
| 212 | struct srp_event_struct *evt) |
| 213 | { |
| 214 | int index = evt - pool->events; |
| 215 | if (index < 0 || index >= pool->size) /* outside of bounds */ |
| 216 | return 0; |
| 217 | if (evt != pool->events + index) /* unaligned */ |
| 218 | return 0; |
| 219 | return 1; |
| 220 | } |
| 221 | |
| 222 | /** |
| 223 | * ibmvscsi_free-event_struct: - Changes status of event to "free" |
| 224 | * @pool: event_pool that contains the event |
| 225 | * @evt: srp_event_struct to be modified |
| 226 | * |
| 227 | */ |
| 228 | static void free_event_struct(struct event_pool *pool, |
| 229 | struct srp_event_struct *evt) |
| 230 | { |
| 231 | if (!valid_event_struct(pool, evt)) { |
Brian King | 6c0a60e | 2007-06-13 17:12:19 -0500 | [diff] [blame] | 232 | dev_err(evt->hostdata->dev, "Freeing invalid event_struct %p " |
| 233 | "(not in pool %p)\n", evt, pool->events); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | return; |
| 235 | } |
| 236 | if (atomic_inc_return(&evt->free) != 1) { |
Brian King | 6c0a60e | 2007-06-13 17:12:19 -0500 | [diff] [blame] | 237 | dev_err(evt->hostdata->dev, "Freeing event_struct %p " |
| 238 | "which is not in use!\n", evt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | return; |
| 240 | } |
| 241 | } |
| 242 | |
| 243 | /** |
| 244 | * get_evt_struct: - Gets the next free event in pool |
| 245 | * @pool: event_pool that contains the events to be searched |
| 246 | * |
| 247 | * Returns the next event in "free" state, and NULL if none are free. |
| 248 | * Note that no synchronization is done here, we assume the host_lock |
| 249 | * will syncrhonze things. |
| 250 | */ |
| 251 | static struct srp_event_struct *get_event_struct(struct event_pool *pool) |
| 252 | { |
| 253 | int i; |
| 254 | int poolsize = pool->size; |
| 255 | int offset = pool->next; |
| 256 | |
| 257 | for (i = 0; i < poolsize; i++) { |
| 258 | offset = (offset + 1) % poolsize; |
| 259 | if (!atomic_dec_if_positive(&pool->events[offset].free)) { |
| 260 | pool->next = offset; |
| 261 | return &pool->events[offset]; |
| 262 | } |
| 263 | } |
| 264 | |
| 265 | printk(KERN_ERR "ibmvscsi: found no event struct in pool!\n"); |
| 266 | return NULL; |
| 267 | } |
| 268 | |
| 269 | /** |
| 270 | * init_event_struct: Initialize fields in an event struct that are always |
| 271 | * required. |
| 272 | * @evt: The event |
| 273 | * @done: Routine to call when the event is responded to |
| 274 | * @format: SRP or MAD format |
| 275 | * @timeout: timeout value set in the CRQ |
| 276 | */ |
| 277 | static void init_event_struct(struct srp_event_struct *evt_struct, |
| 278 | void (*done) (struct srp_event_struct *), |
| 279 | u8 format, |
| 280 | int timeout) |
| 281 | { |
| 282 | evt_struct->cmnd = NULL; |
| 283 | evt_struct->cmnd_done = NULL; |
| 284 | evt_struct->sync_srp = NULL; |
| 285 | evt_struct->crq.format = format; |
| 286 | evt_struct->crq.timeout = timeout; |
| 287 | evt_struct->done = done; |
| 288 | } |
| 289 | |
| 290 | /* ------------------------------------------------------------ |
| 291 | * Routines for receiving SCSI responses from the hosting partition |
| 292 | */ |
| 293 | |
| 294 | /** |
| 295 | * set_srp_direction: Set the fields in the srp related to data |
| 296 | * direction and number of buffers based on the direction in |
| 297 | * the scsi_cmnd and the number of buffers |
| 298 | */ |
| 299 | static void set_srp_direction(struct scsi_cmnd *cmd, |
| 300 | struct srp_cmd *srp_cmd, |
| 301 | int numbuf) |
| 302 | { |
FUJITA Tomonori | ef26567 | 2006-03-26 03:57:14 +0900 | [diff] [blame] | 303 | u8 fmt; |
| 304 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | if (numbuf == 0) |
| 306 | return; |
| 307 | |
FUJITA Tomonori | ef26567 | 2006-03-26 03:57:14 +0900 | [diff] [blame] | 308 | if (numbuf == 1) |
| 309 | fmt = SRP_DATA_DESC_DIRECT; |
| 310 | else { |
| 311 | fmt = SRP_DATA_DESC_INDIRECT; |
| 312 | numbuf = min(numbuf, MAX_INDIRECT_BUFS); |
| 313 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | if (cmd->sc_data_direction == DMA_TO_DEVICE) |
FUJITA Tomonori | ef26567 | 2006-03-26 03:57:14 +0900 | [diff] [blame] | 315 | srp_cmd->data_out_desc_cnt = numbuf; |
| 316 | else |
| 317 | srp_cmd->data_in_desc_cnt = numbuf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | } |
FUJITA Tomonori | ef26567 | 2006-03-26 03:57:14 +0900 | [diff] [blame] | 319 | |
| 320 | if (cmd->sc_data_direction == DMA_TO_DEVICE) |
| 321 | srp_cmd->buf_fmt = fmt << 4; |
| 322 | else |
| 323 | srp_cmd->buf_fmt = fmt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | } |
| 325 | |
| 326 | /** |
| 327 | * unmap_cmd_data: - Unmap data pointed in srp_cmd based on the format |
| 328 | * @cmd: srp_cmd whose additional_data member will be unmapped |
| 329 | * @dev: device for which the memory is mapped |
| 330 | * |
| 331 | */ |
James Bottomley | 4dddbc2 | 2005-09-06 17:11:54 -0500 | [diff] [blame] | 332 | static void unmap_cmd_data(struct srp_cmd *cmd, |
| 333 | struct srp_event_struct *evt_struct, |
| 334 | struct device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | { |
FUJITA Tomonori | ef26567 | 2006-03-26 03:57:14 +0900 | [diff] [blame] | 336 | u8 out_fmt, in_fmt; |
| 337 | |
| 338 | out_fmt = cmd->buf_fmt >> 4; |
| 339 | in_fmt = cmd->buf_fmt & ((1U << 4) - 1); |
| 340 | |
| 341 | if (out_fmt == SRP_NO_DATA_DESC && in_fmt == SRP_NO_DATA_DESC) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | return; |
James Bottomley | 4dddbc2 | 2005-09-06 17:11:54 -0500 | [diff] [blame] | 343 | |
FUJITA Tomonori | a71fa1f | 2010-04-02 15:50:24 +0900 | [diff] [blame] | 344 | if (evt_struct->cmnd) |
| 345 | scsi_dma_unmap(evt_struct->cmnd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | } |
| 347 | |
FUJITA Tomonori | 9413d7b | 2007-05-26 00:32:58 +0900 | [diff] [blame] | 348 | static int map_sg_list(struct scsi_cmnd *cmd, int nseg, |
FUJITA Tomonori | ef26567 | 2006-03-26 03:57:14 +0900 | [diff] [blame] | 349 | struct srp_direct_buf *md) |
James Bottomley | 4dddbc2 | 2005-09-06 17:11:54 -0500 | [diff] [blame] | 350 | { |
| 351 | int i; |
FUJITA Tomonori | 9413d7b | 2007-05-26 00:32:58 +0900 | [diff] [blame] | 352 | struct scatterlist *sg; |
James Bottomley | 4dddbc2 | 2005-09-06 17:11:54 -0500 | [diff] [blame] | 353 | u64 total_length = 0; |
| 354 | |
FUJITA Tomonori | 9413d7b | 2007-05-26 00:32:58 +0900 | [diff] [blame] | 355 | scsi_for_each_sg(cmd, sg, nseg, i) { |
FUJITA Tomonori | ef26567 | 2006-03-26 03:57:14 +0900 | [diff] [blame] | 356 | struct srp_direct_buf *descr = md + i; |
FUJITA Tomonori | 9413d7b | 2007-05-26 00:32:58 +0900 | [diff] [blame] | 357 | descr->va = sg_dma_address(sg); |
| 358 | descr->len = sg_dma_len(sg); |
FUJITA Tomonori | ef26567 | 2006-03-26 03:57:14 +0900 | [diff] [blame] | 359 | descr->key = 0; |
FUJITA Tomonori | 9413d7b | 2007-05-26 00:32:58 +0900 | [diff] [blame] | 360 | total_length += sg_dma_len(sg); |
James Bottomley | 4dddbc2 | 2005-09-06 17:11:54 -0500 | [diff] [blame] | 361 | } |
| 362 | return total_length; |
| 363 | } |
| 364 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | /** |
| 366 | * map_sg_data: - Maps dma for a scatterlist and initializes decriptor fields |
| 367 | * @cmd: Scsi_Cmnd with the scatterlist |
| 368 | * @srp_cmd: srp_cmd that contains the memory descriptor |
| 369 | * @dev: device for which to map dma memory |
| 370 | * |
| 371 | * Called by map_data_for_srp_cmd() when building srp cmd from scsi cmd. |
| 372 | * Returns 1 on success. |
| 373 | */ |
| 374 | static int map_sg_data(struct scsi_cmnd *cmd, |
James Bottomley | 4dddbc2 | 2005-09-06 17:11:54 -0500 | [diff] [blame] | 375 | struct srp_event_struct *evt_struct, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | struct srp_cmd *srp_cmd, struct device *dev) |
| 377 | { |
| 378 | |
James Bottomley | 4dddbc2 | 2005-09-06 17:11:54 -0500 | [diff] [blame] | 379 | int sg_mapped; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | u64 total_length = 0; |
FUJITA Tomonori | ef26567 | 2006-03-26 03:57:14 +0900 | [diff] [blame] | 381 | struct srp_direct_buf *data = |
| 382 | (struct srp_direct_buf *) srp_cmd->add_data; |
| 383 | struct srp_indirect_buf *indirect = |
| 384 | (struct srp_indirect_buf *) data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | |
FUJITA Tomonori | 9413d7b | 2007-05-26 00:32:58 +0900 | [diff] [blame] | 386 | sg_mapped = scsi_dma_map(cmd); |
| 387 | if (!sg_mapped) |
| 388 | return 1; |
| 389 | else if (sg_mapped < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | return 0; |
| 391 | |
| 392 | set_srp_direction(cmd, srp_cmd, sg_mapped); |
| 393 | |
| 394 | /* special case; we can use a single direct descriptor */ |
| 395 | if (sg_mapped == 1) { |
FUJITA Tomonori | 9413d7b | 2007-05-26 00:32:58 +0900 | [diff] [blame] | 396 | map_sg_list(cmd, sg_mapped, data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | return 1; |
| 398 | } |
| 399 | |
FUJITA Tomonori | ef26567 | 2006-03-26 03:57:14 +0900 | [diff] [blame] | 400 | indirect->table_desc.va = 0; |
| 401 | indirect->table_desc.len = sg_mapped * sizeof(struct srp_direct_buf); |
| 402 | indirect->table_desc.key = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | |
James Bottomley | 4dddbc2 | 2005-09-06 17:11:54 -0500 | [diff] [blame] | 404 | if (sg_mapped <= MAX_INDIRECT_BUFS) { |
FUJITA Tomonori | 9413d7b | 2007-05-26 00:32:58 +0900 | [diff] [blame] | 405 | total_length = map_sg_list(cmd, sg_mapped, |
FUJITA Tomonori | ef26567 | 2006-03-26 03:57:14 +0900 | [diff] [blame] | 406 | &indirect->desc_list[0]); |
| 407 | indirect->len = total_length; |
James Bottomley | 4dddbc2 | 2005-09-06 17:11:54 -0500 | [diff] [blame] | 408 | return 1; |
| 409 | } |
| 410 | |
| 411 | /* get indirect table */ |
| 412 | if (!evt_struct->ext_list) { |
FUJITA Tomonori | ef26567 | 2006-03-26 03:57:14 +0900 | [diff] [blame] | 413 | evt_struct->ext_list = (struct srp_direct_buf *) |
FUJITA Tomonori | 9413d7b | 2007-05-26 00:32:58 +0900 | [diff] [blame] | 414 | dma_alloc_coherent(dev, |
FUJITA Tomonori | ef26567 | 2006-03-26 03:57:14 +0900 | [diff] [blame] | 415 | SG_ALL * sizeof(struct srp_direct_buf), |
| 416 | &evt_struct->ext_list_token, 0); |
James Bottomley | 4dddbc2 | 2005-09-06 17:11:54 -0500 | [diff] [blame] | 417 | if (!evt_struct->ext_list) { |
Robert Jennings | 7912a0a | 2008-07-24 04:35:27 +1000 | [diff] [blame] | 418 | if (!firmware_has_feature(FW_FEATURE_CMO)) |
| 419 | sdev_printk(KERN_ERR, cmd->device, |
| 420 | "Can't allocate memory " |
| 421 | "for indirect table\n"); |
Robert Jennings | e637d55 | 2009-01-22 13:40:09 -0600 | [diff] [blame] | 422 | scsi_dma_unmap(cmd); |
James Bottomley | 4dddbc2 | 2005-09-06 17:11:54 -0500 | [diff] [blame] | 423 | return 0; |
James Bottomley | 4dddbc2 | 2005-09-06 17:11:54 -0500 | [diff] [blame] | 424 | } |
| 425 | } |
| 426 | |
FUJITA Tomonori | 9413d7b | 2007-05-26 00:32:58 +0900 | [diff] [blame] | 427 | total_length = map_sg_list(cmd, sg_mapped, evt_struct->ext_list); |
James Bottomley | 4dddbc2 | 2005-09-06 17:11:54 -0500 | [diff] [blame] | 428 | |
FUJITA Tomonori | ef26567 | 2006-03-26 03:57:14 +0900 | [diff] [blame] | 429 | indirect->len = total_length; |
| 430 | indirect->table_desc.va = evt_struct->ext_list_token; |
| 431 | indirect->table_desc.len = sg_mapped * sizeof(indirect->desc_list[0]); |
| 432 | memcpy(indirect->desc_list, evt_struct->ext_list, |
| 433 | MAX_INDIRECT_BUFS * sizeof(struct srp_direct_buf)); |
James Bottomley | 4dddbc2 | 2005-09-06 17:11:54 -0500 | [diff] [blame] | 434 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | } |
| 436 | |
| 437 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | * map_data_for_srp_cmd: - Calls functions to map data for srp cmds |
| 439 | * @cmd: struct scsi_cmnd with the memory to be mapped |
| 440 | * @srp_cmd: srp_cmd that contains the memory descriptor |
| 441 | * @dev: dma device for which to map dma memory |
| 442 | * |
| 443 | * Called by scsi_cmd_to_srp_cmd() when converting scsi cmds to srp cmds |
| 444 | * Returns 1 on success. |
| 445 | */ |
| 446 | static int map_data_for_srp_cmd(struct scsi_cmnd *cmd, |
James Bottomley | 4dddbc2 | 2005-09-06 17:11:54 -0500 | [diff] [blame] | 447 | struct srp_event_struct *evt_struct, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | struct srp_cmd *srp_cmd, struct device *dev) |
| 449 | { |
| 450 | switch (cmd->sc_data_direction) { |
| 451 | case DMA_FROM_DEVICE: |
| 452 | case DMA_TO_DEVICE: |
| 453 | break; |
| 454 | case DMA_NONE: |
| 455 | return 1; |
| 456 | case DMA_BIDIRECTIONAL: |
Brian King | 6c0a60e | 2007-06-13 17:12:19 -0500 | [diff] [blame] | 457 | sdev_printk(KERN_ERR, cmd->device, |
| 458 | "Can't map DMA_BIDIRECTIONAL to read/write\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | return 0; |
| 460 | default: |
Brian King | 6c0a60e | 2007-06-13 17:12:19 -0500 | [diff] [blame] | 461 | sdev_printk(KERN_ERR, cmd->device, |
| 462 | "Unknown data direction 0x%02x; can't map!\n", |
| 463 | cmd->sc_data_direction); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | return 0; |
| 465 | } |
| 466 | |
FUJITA Tomonori | 9413d7b | 2007-05-26 00:32:58 +0900 | [diff] [blame] | 467 | return map_sg_data(cmd, evt_struct, srp_cmd, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | } |
| 469 | |
Brian King | 3d0e91f | 2007-06-13 17:12:26 -0500 | [diff] [blame] | 470 | /** |
| 471 | * purge_requests: Our virtual adapter just shut down. purge any sent requests |
| 472 | * @hostdata: the adapter |
| 473 | */ |
| 474 | static void purge_requests(struct ibmvscsi_host_data *hostdata, int error_code) |
| 475 | { |
| 476 | struct srp_event_struct *tmp_evt, *pos; |
| 477 | unsigned long flags; |
| 478 | |
| 479 | spin_lock_irqsave(hostdata->host->host_lock, flags); |
| 480 | list_for_each_entry_safe(tmp_evt, pos, &hostdata->sent, list) { |
| 481 | list_del(&tmp_evt->list); |
| 482 | del_timer(&tmp_evt->timer); |
| 483 | if (tmp_evt->cmnd) { |
| 484 | tmp_evt->cmnd->result = (error_code << 16); |
| 485 | unmap_cmd_data(&tmp_evt->iu.srp.cmd, |
| 486 | tmp_evt, |
| 487 | tmp_evt->hostdata->dev); |
| 488 | if (tmp_evt->cmnd_done) |
| 489 | tmp_evt->cmnd_done(tmp_evt->cmnd); |
| 490 | } else if (tmp_evt->done) |
| 491 | tmp_evt->done(tmp_evt); |
| 492 | free_event_struct(&tmp_evt->hostdata->pool, tmp_evt); |
| 493 | } |
| 494 | spin_unlock_irqrestore(hostdata->host->host_lock, flags); |
| 495 | } |
| 496 | |
| 497 | /** |
| 498 | * ibmvscsi_reset_host - Reset the connection to the server |
| 499 | * @hostdata: struct ibmvscsi_host_data to reset |
| 500 | */ |
| 501 | static void ibmvscsi_reset_host(struct ibmvscsi_host_data *hostdata) |
| 502 | { |
| 503 | scsi_block_requests(hostdata->host); |
| 504 | atomic_set(&hostdata->request_limit, 0); |
| 505 | |
| 506 | purge_requests(hostdata, DID_ERROR); |
David Woodhouse | d3849d5 | 2007-09-22 08:29:36 +1000 | [diff] [blame] | 507 | if ((ibmvscsi_ops->reset_crq_queue(&hostdata->queue, hostdata)) || |
| 508 | (ibmvscsi_ops->send_crq(hostdata, 0xC001000000000000LL, 0)) || |
Brian King | 3d0e91f | 2007-06-13 17:12:26 -0500 | [diff] [blame] | 509 | (vio_enable_interrupts(to_vio_dev(hostdata->dev)))) { |
| 510 | atomic_set(&hostdata->request_limit, -1); |
| 511 | dev_err(hostdata->dev, "error after reset\n"); |
| 512 | } |
| 513 | |
| 514 | scsi_unblock_requests(hostdata->host); |
| 515 | } |
| 516 | |
| 517 | /** |
| 518 | * ibmvscsi_timeout - Internal command timeout handler |
| 519 | * @evt_struct: struct srp_event_struct that timed out |
| 520 | * |
| 521 | * Called when an internally generated command times out |
| 522 | */ |
| 523 | static void ibmvscsi_timeout(struct srp_event_struct *evt_struct) |
| 524 | { |
| 525 | struct ibmvscsi_host_data *hostdata = evt_struct->hostdata; |
| 526 | |
| 527 | dev_err(hostdata->dev, "Command timed out (%x). Resetting connection\n", |
| 528 | evt_struct->iu.srp.cmd.opcode); |
| 529 | |
| 530 | ibmvscsi_reset_host(hostdata); |
| 531 | } |
| 532 | |
| 533 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | /* ------------------------------------------------------------ |
| 535 | * Routines for sending and receiving SRPs |
| 536 | */ |
| 537 | /** |
| 538 | * ibmvscsi_send_srp_event: - Transforms event to u64 array and calls send_crq() |
| 539 | * @evt_struct: evt_struct to be sent |
| 540 | * @hostdata: ibmvscsi_host_data of host |
Brian King | 3d0e91f | 2007-06-13 17:12:26 -0500 | [diff] [blame] | 541 | * @timeout: timeout in seconds - 0 means do not time command |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | * |
| 543 | * Returns the value returned from ibmvscsi_send_crq(). (Zero for success) |
| 544 | * Note that this routine assumes that host_lock is held for synchronization |
| 545 | */ |
| 546 | static int ibmvscsi_send_srp_event(struct srp_event_struct *evt_struct, |
Brian King | 3d0e91f | 2007-06-13 17:12:26 -0500 | [diff] [blame] | 547 | struct ibmvscsi_host_data *hostdata, |
| 548 | unsigned long timeout) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | u64 *crq_as_u64 = (u64 *) &evt_struct->crq; |
Robert Jennings | 3c887e8 | 2007-10-30 11:37:07 -0500 | [diff] [blame] | 551 | int request_status = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | int rc; |
| 553 | |
Robert Jennings | a897ff2 | 2007-03-28 12:45:46 -0500 | [diff] [blame] | 554 | /* If we have exhausted our request limit, just fail this request, |
| 555 | * unless it is for a reset or abort. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | * Note that there are rare cases involving driver generated requests |
| 557 | * (such as task management requests) that the mid layer may think we |
| 558 | * can handle more requests (can_queue) when we actually can't |
| 559 | */ |
Dave C Boutcher | cefbda2 | 2006-06-12 21:22:51 -0500 | [diff] [blame] | 560 | if (evt_struct->crq.format == VIOSRP_SRP_FORMAT) { |
| 561 | request_status = |
| 562 | atomic_dec_if_positive(&hostdata->request_limit); |
| 563 | /* If request limit was -1 when we started, it is now even |
| 564 | * less than that |
| 565 | */ |
| 566 | if (request_status < -1) |
| 567 | goto send_error; |
Robert Jennings | a897ff2 | 2007-03-28 12:45:46 -0500 | [diff] [blame] | 568 | /* Otherwise, we may have run out of requests. */ |
Robert Jennings | 3c887e8 | 2007-10-30 11:37:07 -0500 | [diff] [blame] | 569 | /* If request limit was 0 when we started the adapter is in the |
| 570 | * process of performing a login with the server adapter, or |
| 571 | * we may have run out of requests. |
| 572 | */ |
| 573 | else if (request_status == -1 && |
| 574 | evt_struct->iu.srp.login_req.opcode != SRP_LOGIN_REQ) |
| 575 | goto send_busy; |
Robert Jennings | a897ff2 | 2007-03-28 12:45:46 -0500 | [diff] [blame] | 576 | /* Abort and reset calls should make it through. |
| 577 | * Nothing except abort and reset should use the last two |
| 578 | * slots unless we had two or less to begin with. |
| 579 | */ |
| 580 | else if (request_status < 2 && |
| 581 | evt_struct->iu.srp.cmd.opcode != SRP_TSK_MGMT) { |
| 582 | /* In the case that we have less than two requests |
| 583 | * available, check the server limit as a combination |
| 584 | * of the request limit and the number of requests |
| 585 | * in-flight (the size of the send list). If the |
| 586 | * server limit is greater than 2, return busy so |
| 587 | * that the last two are reserved for reset and abort. |
| 588 | */ |
| 589 | int server_limit = request_status; |
| 590 | struct srp_event_struct *tmp_evt; |
| 591 | |
| 592 | list_for_each_entry(tmp_evt, &hostdata->sent, list) { |
| 593 | server_limit++; |
| 594 | } |
| 595 | |
| 596 | if (server_limit > 2) |
| 597 | goto send_busy; |
| 598 | } |
Dave C Boutcher | cefbda2 | 2006-06-12 21:22:51 -0500 | [diff] [blame] | 599 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | |
| 601 | /* Copy the IU into the transfer area */ |
| 602 | *evt_struct->xfer_iu = evt_struct->iu; |
FUJITA Tomonori | ef26567 | 2006-03-26 03:57:14 +0900 | [diff] [blame] | 603 | evt_struct->xfer_iu->srp.rsp.tag = (u64)evt_struct; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 604 | |
| 605 | /* Add this to the sent list. We need to do this |
| 606 | * before we actually send |
| 607 | * in case it comes back REALLY fast |
| 608 | */ |
| 609 | list_add_tail(&evt_struct->list, &hostdata->sent); |
| 610 | |
Brian King | 3d0e91f | 2007-06-13 17:12:26 -0500 | [diff] [blame] | 611 | init_timer(&evt_struct->timer); |
| 612 | if (timeout) { |
| 613 | evt_struct->timer.data = (unsigned long) evt_struct; |
| 614 | evt_struct->timer.expires = jiffies + (timeout * HZ); |
| 615 | evt_struct->timer.function = (void (*)(unsigned long))ibmvscsi_timeout; |
| 616 | add_timer(&evt_struct->timer); |
| 617 | } |
| 618 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | if ((rc = |
David Woodhouse | d3849d5 | 2007-09-22 08:29:36 +1000 | [diff] [blame] | 620 | ibmvscsi_ops->send_crq(hostdata, crq_as_u64[0], crq_as_u64[1])) != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 621 | list_del(&evt_struct->list); |
Brian King | 3d0e91f | 2007-06-13 17:12:26 -0500 | [diff] [blame] | 622 | del_timer(&evt_struct->timer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 623 | |
Robert Jennings | 860784c | 2007-11-12 09:00:23 -0600 | [diff] [blame] | 624 | /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY. |
| 625 | * Firmware will send a CRQ with a transport event (0xFF) to |
| 626 | * tell this client what has happened to the transport. This |
| 627 | * will be handled in ibmvscsi_handle_crq() |
| 628 | */ |
| 629 | if (rc == H_CLOSED) { |
| 630 | dev_warn(hostdata->dev, "send warning. " |
| 631 | "Receive queue closed, will retry.\n"); |
| 632 | goto send_busy; |
| 633 | } |
Brian King | 6c0a60e | 2007-06-13 17:12:19 -0500 | [diff] [blame] | 634 | dev_err(hostdata->dev, "send error %d\n", rc); |
Robert Jennings | a897ff2 | 2007-03-28 12:45:46 -0500 | [diff] [blame] | 635 | atomic_inc(&hostdata->request_limit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 636 | goto send_error; |
| 637 | } |
| 638 | |
| 639 | return 0; |
| 640 | |
Dave C Boutcher | cefbda2 | 2006-06-12 21:22:51 -0500 | [diff] [blame] | 641 | send_busy: |
James Bottomley | 4dddbc2 | 2005-09-06 17:11:54 -0500 | [diff] [blame] | 642 | unmap_cmd_data(&evt_struct->iu.srp.cmd, evt_struct, hostdata->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | free_event_struct(&hostdata->pool, evt_struct); |
Robert Jennings | 3c887e8 | 2007-10-30 11:37:07 -0500 | [diff] [blame] | 645 | if (request_status != -1) |
| 646 | atomic_inc(&hostdata->request_limit); |
Robert Jennings | a897ff2 | 2007-03-28 12:45:46 -0500 | [diff] [blame] | 647 | return SCSI_MLQUEUE_HOST_BUSY; |
Dave C Boutcher | cefbda2 | 2006-06-12 21:22:51 -0500 | [diff] [blame] | 648 | |
| 649 | send_error: |
| 650 | unmap_cmd_data(&evt_struct->iu.srp.cmd, evt_struct, hostdata->dev); |
| 651 | |
| 652 | if (evt_struct->cmnd != NULL) { |
| 653 | evt_struct->cmnd->result = DID_ERROR << 16; |
| 654 | evt_struct->cmnd_done(evt_struct->cmnd); |
| 655 | } else if (evt_struct->done) |
| 656 | evt_struct->done(evt_struct); |
| 657 | |
| 658 | free_event_struct(&hostdata->pool, evt_struct); |
| 659 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | } |
| 661 | |
| 662 | /** |
| 663 | * handle_cmd_rsp: - Handle responses from commands |
| 664 | * @evt_struct: srp_event_struct to be handled |
| 665 | * |
| 666 | * Used as a callback by when sending scsi cmds. |
| 667 | * Gets called by ibmvscsi_handle_crq() |
| 668 | */ |
| 669 | static void handle_cmd_rsp(struct srp_event_struct *evt_struct) |
| 670 | { |
| 671 | struct srp_rsp *rsp = &evt_struct->xfer_iu->srp.rsp; |
| 672 | struct scsi_cmnd *cmnd = evt_struct->cmnd; |
| 673 | |
FUJITA Tomonori | ef26567 | 2006-03-26 03:57:14 +0900 | [diff] [blame] | 674 | if (unlikely(rsp->opcode != SRP_RSP)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | if (printk_ratelimit()) |
Brian King | 6c0a60e | 2007-06-13 17:12:19 -0500 | [diff] [blame] | 676 | dev_warn(evt_struct->hostdata->dev, |
| 677 | "bad SRP RSP type %d\n", rsp->opcode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 678 | } |
| 679 | |
| 680 | if (cmnd) { |
Brian King | c3a3b55 | 2008-04-25 16:58:29 -0500 | [diff] [blame] | 681 | cmnd->result |= rsp->status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | if (((cmnd->result >> 1) & 0x1f) == CHECK_CONDITION) |
| 683 | memcpy(cmnd->sense_buffer, |
FUJITA Tomonori | ef26567 | 2006-03-26 03:57:14 +0900 | [diff] [blame] | 684 | rsp->data, |
| 685 | rsp->sense_data_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | unmap_cmd_data(&evt_struct->iu.srp.cmd, |
James Bottomley | 4dddbc2 | 2005-09-06 17:11:54 -0500 | [diff] [blame] | 687 | evt_struct, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 688 | evt_struct->hostdata->dev); |
| 689 | |
FUJITA Tomonori | ef26567 | 2006-03-26 03:57:14 +0900 | [diff] [blame] | 690 | if (rsp->flags & SRP_RSP_FLAG_DOOVER) |
FUJITA Tomonori | 9413d7b | 2007-05-26 00:32:58 +0900 | [diff] [blame] | 691 | scsi_set_resid(cmnd, rsp->data_out_res_cnt); |
FUJITA Tomonori | ef26567 | 2006-03-26 03:57:14 +0900 | [diff] [blame] | 692 | else if (rsp->flags & SRP_RSP_FLAG_DIOVER) |
FUJITA Tomonori | 9413d7b | 2007-05-26 00:32:58 +0900 | [diff] [blame] | 693 | scsi_set_resid(cmnd, rsp->data_in_res_cnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | } |
| 695 | |
| 696 | if (evt_struct->cmnd_done) |
| 697 | evt_struct->cmnd_done(cmnd); |
| 698 | } |
| 699 | |
| 700 | /** |
| 701 | * lun_from_dev: - Returns the lun of the scsi device |
| 702 | * @dev: struct scsi_device |
| 703 | * |
| 704 | */ |
| 705 | static inline u16 lun_from_dev(struct scsi_device *dev) |
| 706 | { |
| 707 | return (0x2 << 14) | (dev->id << 8) | (dev->channel << 5) | dev->lun; |
| 708 | } |
| 709 | |
| 710 | /** |
| 711 | * ibmvscsi_queue: - The queuecommand function of the scsi template |
| 712 | * @cmd: struct scsi_cmnd to be executed |
| 713 | * @done: Callback function to be called when cmd is completed |
| 714 | */ |
| 715 | static int ibmvscsi_queuecommand(struct scsi_cmnd *cmnd, |
| 716 | void (*done) (struct scsi_cmnd *)) |
| 717 | { |
| 718 | struct srp_cmd *srp_cmd; |
| 719 | struct srp_event_struct *evt_struct; |
FUJITA Tomonori | ef26567 | 2006-03-26 03:57:14 +0900 | [diff] [blame] | 720 | struct srp_indirect_buf *indirect; |
FUJITA Tomonori | 7603e02 | 2007-07-23 09:28:40 +0900 | [diff] [blame] | 721 | struct ibmvscsi_host_data *hostdata = shost_priv(cmnd->device->host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | u16 lun = lun_from_dev(cmnd->device); |
FUJITA Tomonori | ef26567 | 2006-03-26 03:57:14 +0900 | [diff] [blame] | 723 | u8 out_fmt, in_fmt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | |
Brian King | c3a3b55 | 2008-04-25 16:58:29 -0500 | [diff] [blame] | 725 | cmnd->result = (DID_OK << 16); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 726 | evt_struct = get_event_struct(&hostdata->pool); |
| 727 | if (!evt_struct) |
| 728 | return SCSI_MLQUEUE_HOST_BUSY; |
| 729 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | /* Set up the actual SRP IU */ |
| 731 | srp_cmd = &evt_struct->iu.srp.cmd; |
FUJITA Tomonori | ef26567 | 2006-03-26 03:57:14 +0900 | [diff] [blame] | 732 | memset(srp_cmd, 0x00, SRP_MAX_IU_LEN); |
| 733 | srp_cmd->opcode = SRP_CMD; |
Boaz Harrosh | 64a87b2 | 2008-04-30 11:19:47 +0300 | [diff] [blame] | 734 | memcpy(srp_cmd->cdb, cmnd->cmnd, sizeof(srp_cmd->cdb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 735 | srp_cmd->lun = ((u64) lun) << 48; |
| 736 | |
James Bottomley | 4dddbc2 | 2005-09-06 17:11:54 -0500 | [diff] [blame] | 737 | if (!map_data_for_srp_cmd(cmnd, evt_struct, srp_cmd, hostdata->dev)) { |
Robert Jennings | 7912a0a | 2008-07-24 04:35:27 +1000 | [diff] [blame] | 738 | if (!firmware_has_feature(FW_FEATURE_CMO)) |
| 739 | sdev_printk(KERN_ERR, cmnd->device, |
| 740 | "couldn't convert cmd to srp_cmd\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 741 | free_event_struct(&hostdata->pool, evt_struct); |
| 742 | return SCSI_MLQUEUE_HOST_BUSY; |
| 743 | } |
| 744 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 745 | init_event_struct(evt_struct, |
| 746 | handle_cmd_rsp, |
| 747 | VIOSRP_SRP_FORMAT, |
Jens Axboe | 242f9dc | 2008-09-14 05:55:09 -0700 | [diff] [blame] | 748 | cmnd->request->timeout/HZ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 749 | |
| 750 | evt_struct->cmnd = cmnd; |
| 751 | evt_struct->cmnd_done = done; |
| 752 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 753 | /* Fix up dma address of the buffer itself */ |
FUJITA Tomonori | ef26567 | 2006-03-26 03:57:14 +0900 | [diff] [blame] | 754 | indirect = (struct srp_indirect_buf *) srp_cmd->add_data; |
| 755 | out_fmt = srp_cmd->buf_fmt >> 4; |
| 756 | in_fmt = srp_cmd->buf_fmt & ((1U << 4) - 1); |
| 757 | if ((in_fmt == SRP_DATA_DESC_INDIRECT || |
| 758 | out_fmt == SRP_DATA_DESC_INDIRECT) && |
| 759 | indirect->table_desc.va == 0) { |
| 760 | indirect->table_desc.va = evt_struct->crq.IU_data_ptr + |
| 761 | offsetof(struct srp_cmd, add_data) + |
| 762 | offsetof(struct srp_indirect_buf, desc_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | } |
| 764 | |
Brian King | 3d0e91f | 2007-06-13 17:12:26 -0500 | [diff] [blame] | 765 | return ibmvscsi_send_srp_event(evt_struct, hostdata, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | } |
| 767 | |
| 768 | /* ------------------------------------------------------------ |
| 769 | * Routines for driver initialization |
| 770 | */ |
Brian King | 3507e13 | 2009-06-08 16:19:04 -0500 | [diff] [blame] | 771 | |
| 772 | /** |
Brian King | 126c5cc | 2009-06-08 16:19:08 -0500 | [diff] [blame] | 773 | * map_persist_bufs: - Pre-map persistent data for adapter logins |
| 774 | * @hostdata: ibmvscsi_host_data of host |
| 775 | * |
| 776 | * Map the capabilities and adapter info DMA buffers to avoid runtime failures. |
| 777 | * Return 1 on error, 0 on success. |
| 778 | */ |
| 779 | static int map_persist_bufs(struct ibmvscsi_host_data *hostdata) |
| 780 | { |
| 781 | |
| 782 | hostdata->caps_addr = dma_map_single(hostdata->dev, &hostdata->caps, |
| 783 | sizeof(hostdata->caps), DMA_BIDIRECTIONAL); |
| 784 | |
| 785 | if (dma_mapping_error(hostdata->dev, hostdata->caps_addr)) { |
| 786 | dev_err(hostdata->dev, "Unable to map capabilities buffer!\n"); |
| 787 | return 1; |
| 788 | } |
| 789 | |
| 790 | hostdata->adapter_info_addr = dma_map_single(hostdata->dev, |
| 791 | &hostdata->madapter_info, |
| 792 | sizeof(hostdata->madapter_info), |
| 793 | DMA_BIDIRECTIONAL); |
| 794 | if (dma_mapping_error(hostdata->dev, hostdata->adapter_info_addr)) { |
| 795 | dev_err(hostdata->dev, "Unable to map adapter info buffer!\n"); |
| 796 | dma_unmap_single(hostdata->dev, hostdata->caps_addr, |
| 797 | sizeof(hostdata->caps), DMA_BIDIRECTIONAL); |
| 798 | return 1; |
| 799 | } |
| 800 | |
| 801 | return 0; |
| 802 | } |
| 803 | |
| 804 | /** |
| 805 | * unmap_persist_bufs: - Unmap persistent data needed for adapter logins |
| 806 | * @hostdata: ibmvscsi_host_data of host |
| 807 | * |
| 808 | * Unmap the capabilities and adapter info DMA buffers |
| 809 | */ |
| 810 | static void unmap_persist_bufs(struct ibmvscsi_host_data *hostdata) |
| 811 | { |
| 812 | dma_unmap_single(hostdata->dev, hostdata->caps_addr, |
| 813 | sizeof(hostdata->caps), DMA_BIDIRECTIONAL); |
| 814 | |
| 815 | dma_unmap_single(hostdata->dev, hostdata->adapter_info_addr, |
| 816 | sizeof(hostdata->madapter_info), DMA_BIDIRECTIONAL); |
| 817 | } |
| 818 | |
| 819 | /** |
Brian King | 3507e13 | 2009-06-08 16:19:04 -0500 | [diff] [blame] | 820 | * login_rsp: - Handle response to SRP login request |
| 821 | * @evt_struct: srp_event_struct with the response |
| 822 | * |
| 823 | * Used as a "done" callback by when sending srp_login. Gets called |
| 824 | * by ibmvscsi_handle_crq() |
| 825 | */ |
| 826 | static void login_rsp(struct srp_event_struct *evt_struct) |
| 827 | { |
| 828 | struct ibmvscsi_host_data *hostdata = evt_struct->hostdata; |
| 829 | switch (evt_struct->xfer_iu->srp.login_rsp.opcode) { |
| 830 | case SRP_LOGIN_RSP: /* it worked! */ |
| 831 | break; |
| 832 | case SRP_LOGIN_REJ: /* refused! */ |
| 833 | dev_info(hostdata->dev, "SRP_LOGIN_REJ reason %u\n", |
| 834 | evt_struct->xfer_iu->srp.login_rej.reason); |
| 835 | /* Login failed. */ |
| 836 | atomic_set(&hostdata->request_limit, -1); |
| 837 | return; |
| 838 | default: |
| 839 | dev_err(hostdata->dev, "Invalid login response typecode 0x%02x!\n", |
| 840 | evt_struct->xfer_iu->srp.login_rsp.opcode); |
| 841 | /* Login failed. */ |
| 842 | atomic_set(&hostdata->request_limit, -1); |
| 843 | return; |
| 844 | } |
| 845 | |
| 846 | dev_info(hostdata->dev, "SRP_LOGIN succeeded\n"); |
Brian King | 126c5cc | 2009-06-08 16:19:08 -0500 | [diff] [blame] | 847 | hostdata->client_migrated = 0; |
Brian King | 3507e13 | 2009-06-08 16:19:04 -0500 | [diff] [blame] | 848 | |
| 849 | /* Now we know what the real request-limit is. |
| 850 | * This value is set rather than added to request_limit because |
| 851 | * request_limit could have been set to -1 by this client. |
| 852 | */ |
| 853 | atomic_set(&hostdata->request_limit, |
| 854 | evt_struct->xfer_iu->srp.login_rsp.req_lim_delta); |
| 855 | |
| 856 | /* If we had any pending I/Os, kick them */ |
| 857 | scsi_unblock_requests(hostdata->host); |
| 858 | } |
| 859 | |
| 860 | /** |
| 861 | * send_srp_login: - Sends the srp login |
| 862 | * @hostdata: ibmvscsi_host_data of host |
| 863 | * |
| 864 | * Returns zero if successful. |
| 865 | */ |
| 866 | static int send_srp_login(struct ibmvscsi_host_data *hostdata) |
| 867 | { |
| 868 | int rc; |
| 869 | unsigned long flags; |
| 870 | struct srp_login_req *login; |
| 871 | struct srp_event_struct *evt_struct = get_event_struct(&hostdata->pool); |
| 872 | |
| 873 | BUG_ON(!evt_struct); |
| 874 | init_event_struct(evt_struct, login_rsp, |
| 875 | VIOSRP_SRP_FORMAT, login_timeout); |
| 876 | |
| 877 | login = &evt_struct->iu.srp.login_req; |
| 878 | memset(login, 0, sizeof(*login)); |
| 879 | login->opcode = SRP_LOGIN_REQ; |
| 880 | login->req_it_iu_len = sizeof(union srp_iu); |
| 881 | login->req_buf_fmt = SRP_BUF_FORMAT_DIRECT | SRP_BUF_FORMAT_INDIRECT; |
| 882 | |
| 883 | spin_lock_irqsave(hostdata->host->host_lock, flags); |
| 884 | /* Start out with a request limit of 0, since this is negotiated in |
| 885 | * the login request we are just sending and login requests always |
| 886 | * get sent by the driver regardless of request_limit. |
| 887 | */ |
| 888 | atomic_set(&hostdata->request_limit, 0); |
| 889 | |
| 890 | rc = ibmvscsi_send_srp_event(evt_struct, hostdata, login_timeout * 2); |
| 891 | spin_unlock_irqrestore(hostdata->host->host_lock, flags); |
| 892 | dev_info(hostdata->dev, "sent SRP login\n"); |
| 893 | return rc; |
| 894 | }; |
| 895 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 896 | /** |
Brian King | 126c5cc | 2009-06-08 16:19:08 -0500 | [diff] [blame] | 897 | * capabilities_rsp: - Handle response to MAD adapter capabilities request |
| 898 | * @evt_struct: srp_event_struct with the response |
| 899 | * |
| 900 | * Used as a "done" callback by when sending adapter_info. |
| 901 | */ |
| 902 | static void capabilities_rsp(struct srp_event_struct *evt_struct) |
| 903 | { |
| 904 | struct ibmvscsi_host_data *hostdata = evt_struct->hostdata; |
| 905 | |
| 906 | if (evt_struct->xfer_iu->mad.capabilities.common.status) { |
| 907 | dev_err(hostdata->dev, "error 0x%X getting capabilities info\n", |
| 908 | evt_struct->xfer_iu->mad.capabilities.common.status); |
| 909 | } else { |
| 910 | if (hostdata->caps.migration.common.server_support != SERVER_SUPPORTS_CAP) |
| 911 | dev_info(hostdata->dev, "Partition migration not supported\n"); |
| 912 | |
| 913 | if (client_reserve) { |
| 914 | if (hostdata->caps.reserve.common.server_support == |
| 915 | SERVER_SUPPORTS_CAP) |
| 916 | dev_info(hostdata->dev, "Client reserve enabled\n"); |
| 917 | else |
| 918 | dev_info(hostdata->dev, "Client reserve not supported\n"); |
| 919 | } |
| 920 | } |
| 921 | |
| 922 | send_srp_login(hostdata); |
| 923 | } |
| 924 | |
| 925 | /** |
| 926 | * send_mad_capabilities: - Sends the mad capabilities request |
| 927 | * and stores the result so it can be retrieved with |
| 928 | * @hostdata: ibmvscsi_host_data of host |
| 929 | */ |
| 930 | static void send_mad_capabilities(struct ibmvscsi_host_data *hostdata) |
| 931 | { |
| 932 | struct viosrp_capabilities *req; |
| 933 | struct srp_event_struct *evt_struct; |
| 934 | unsigned long flags; |
Grant Likely | 61c7a08 | 2010-04-13 16:12:29 -0700 | [diff] [blame] | 935 | struct device_node *of_node = hostdata->dev->of_node; |
Brian King | 126c5cc | 2009-06-08 16:19:08 -0500 | [diff] [blame] | 936 | const char *location; |
| 937 | |
| 938 | evt_struct = get_event_struct(&hostdata->pool); |
| 939 | BUG_ON(!evt_struct); |
| 940 | |
| 941 | init_event_struct(evt_struct, capabilities_rsp, |
| 942 | VIOSRP_MAD_FORMAT, info_timeout); |
| 943 | |
| 944 | req = &evt_struct->iu.mad.capabilities; |
| 945 | memset(req, 0, sizeof(*req)); |
| 946 | |
| 947 | hostdata->caps.flags = CAP_LIST_SUPPORTED; |
| 948 | if (hostdata->client_migrated) |
| 949 | hostdata->caps.flags |= CLIENT_MIGRATED; |
| 950 | |
| 951 | strncpy(hostdata->caps.name, dev_name(&hostdata->host->shost_gendev), |
| 952 | sizeof(hostdata->caps.name)); |
| 953 | hostdata->caps.name[sizeof(hostdata->caps.name) - 1] = '\0'; |
| 954 | |
| 955 | location = of_get_property(of_node, "ibm,loc-code", NULL); |
| 956 | location = location ? location : dev_name(hostdata->dev); |
| 957 | strncpy(hostdata->caps.loc, location, sizeof(hostdata->caps.loc)); |
| 958 | hostdata->caps.loc[sizeof(hostdata->caps.loc) - 1] = '\0'; |
| 959 | |
| 960 | req->common.type = VIOSRP_CAPABILITIES_TYPE; |
| 961 | req->buffer = hostdata->caps_addr; |
| 962 | |
| 963 | hostdata->caps.migration.common.cap_type = MIGRATION_CAPABILITIES; |
| 964 | hostdata->caps.migration.common.length = sizeof(hostdata->caps.migration); |
| 965 | hostdata->caps.migration.common.server_support = SERVER_SUPPORTS_CAP; |
| 966 | hostdata->caps.migration.ecl = 1; |
| 967 | |
| 968 | if (client_reserve) { |
| 969 | hostdata->caps.reserve.common.cap_type = RESERVATION_CAPABILITIES; |
| 970 | hostdata->caps.reserve.common.length = sizeof(hostdata->caps.reserve); |
| 971 | hostdata->caps.reserve.common.server_support = SERVER_SUPPORTS_CAP; |
| 972 | hostdata->caps.reserve.type = CLIENT_RESERVE_SCSI_2; |
| 973 | req->common.length = sizeof(hostdata->caps); |
| 974 | } else |
| 975 | req->common.length = sizeof(hostdata->caps) - sizeof(hostdata->caps.reserve); |
| 976 | |
| 977 | spin_lock_irqsave(hostdata->host->host_lock, flags); |
| 978 | if (ibmvscsi_send_srp_event(evt_struct, hostdata, info_timeout * 2)) |
| 979 | dev_err(hostdata->dev, "couldn't send CAPABILITIES_REQ!\n"); |
| 980 | spin_unlock_irqrestore(hostdata->host->host_lock, flags); |
| 981 | }; |
| 982 | |
| 983 | /** |
Robert Jennings | c1988e3 | 2009-06-08 16:19:07 -0500 | [diff] [blame] | 984 | * fast_fail_rsp: - Handle response to MAD enable fast fail |
| 985 | * @evt_struct: srp_event_struct with the response |
| 986 | * |
| 987 | * Used as a "done" callback by when sending enable fast fail. Gets called |
| 988 | * by ibmvscsi_handle_crq() |
| 989 | */ |
| 990 | static void fast_fail_rsp(struct srp_event_struct *evt_struct) |
| 991 | { |
| 992 | struct ibmvscsi_host_data *hostdata = evt_struct->hostdata; |
| 993 | u8 status = evt_struct->xfer_iu->mad.fast_fail.common.status; |
| 994 | |
| 995 | if (status == VIOSRP_MAD_NOT_SUPPORTED) |
| 996 | dev_err(hostdata->dev, "fast_fail not supported in server\n"); |
| 997 | else if (status == VIOSRP_MAD_FAILED) |
| 998 | dev_err(hostdata->dev, "fast_fail request failed\n"); |
| 999 | else if (status != VIOSRP_MAD_SUCCESS) |
| 1000 | dev_err(hostdata->dev, "error 0x%X enabling fast_fail\n", status); |
| 1001 | |
Brian King | 126c5cc | 2009-06-08 16:19:08 -0500 | [diff] [blame] | 1002 | send_mad_capabilities(hostdata); |
Robert Jennings | c1988e3 | 2009-06-08 16:19:07 -0500 | [diff] [blame] | 1003 | } |
| 1004 | |
| 1005 | /** |
| 1006 | * init_host - Start host initialization |
| 1007 | * @hostdata: ibmvscsi_host_data of host |
| 1008 | * |
| 1009 | * Returns zero if successful. |
| 1010 | */ |
| 1011 | static int enable_fast_fail(struct ibmvscsi_host_data *hostdata) |
| 1012 | { |
| 1013 | int rc; |
| 1014 | unsigned long flags; |
| 1015 | struct viosrp_fast_fail *fast_fail_mad; |
| 1016 | struct srp_event_struct *evt_struct; |
| 1017 | |
Brian King | 126c5cc | 2009-06-08 16:19:08 -0500 | [diff] [blame] | 1018 | if (!fast_fail) { |
| 1019 | send_mad_capabilities(hostdata); |
| 1020 | return 0; |
| 1021 | } |
Robert Jennings | c1988e3 | 2009-06-08 16:19:07 -0500 | [diff] [blame] | 1022 | |
| 1023 | evt_struct = get_event_struct(&hostdata->pool); |
| 1024 | BUG_ON(!evt_struct); |
| 1025 | |
| 1026 | init_event_struct(evt_struct, fast_fail_rsp, VIOSRP_MAD_FORMAT, info_timeout); |
| 1027 | |
| 1028 | fast_fail_mad = &evt_struct->iu.mad.fast_fail; |
| 1029 | memset(fast_fail_mad, 0, sizeof(*fast_fail_mad)); |
| 1030 | fast_fail_mad->common.type = VIOSRP_ENABLE_FAST_FAIL; |
| 1031 | fast_fail_mad->common.length = sizeof(*fast_fail_mad); |
| 1032 | |
| 1033 | spin_lock_irqsave(hostdata->host->host_lock, flags); |
| 1034 | rc = ibmvscsi_send_srp_event(evt_struct, hostdata, info_timeout * 2); |
| 1035 | spin_unlock_irqrestore(hostdata->host->host_lock, flags); |
| 1036 | return rc; |
| 1037 | } |
| 1038 | |
| 1039 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1040 | * adapter_info_rsp: - Handle response to MAD adapter info request |
| 1041 | * @evt_struct: srp_event_struct with the response |
| 1042 | * |
| 1043 | * Used as a "done" callback by when sending adapter_info. Gets called |
| 1044 | * by ibmvscsi_handle_crq() |
| 1045 | */ |
| 1046 | static void adapter_info_rsp(struct srp_event_struct *evt_struct) |
| 1047 | { |
| 1048 | struct ibmvscsi_host_data *hostdata = evt_struct->hostdata; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1049 | |
| 1050 | if (evt_struct->xfer_iu->mad.adapter_info.common.status) { |
Brian King | 6c0a60e | 2007-06-13 17:12:19 -0500 | [diff] [blame] | 1051 | dev_err(hostdata->dev, "error %d getting adapter info\n", |
| 1052 | evt_struct->xfer_iu->mad.adapter_info.common.status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1053 | } else { |
Brian King | 6c0a60e | 2007-06-13 17:12:19 -0500 | [diff] [blame] | 1054 | dev_info(hostdata->dev, "host srp version: %s, " |
| 1055 | "host partition %s (%d), OS %d, max io %u\n", |
| 1056 | hostdata->madapter_info.srp_version, |
| 1057 | hostdata->madapter_info.partition_name, |
| 1058 | hostdata->madapter_info.partition_number, |
| 1059 | hostdata->madapter_info.os_type, |
| 1060 | hostdata->madapter_info.port_max_txu[0]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1061 | |
| 1062 | if (hostdata->madapter_info.port_max_txu[0]) |
| 1063 | hostdata->host->max_sectors = |
| 1064 | hostdata->madapter_info.port_max_txu[0] >> 9; |
Dave C Boutcher | 154fb61 | 2005-09-13 10:09:02 -0500 | [diff] [blame] | 1065 | |
| 1066 | if (hostdata->madapter_info.os_type == 3 && |
| 1067 | strcmp(hostdata->madapter_info.srp_version, "1.6a") <= 0) { |
Brian King | 6c0a60e | 2007-06-13 17:12:19 -0500 | [diff] [blame] | 1068 | dev_err(hostdata->dev, "host (Ver. %s) doesn't support large transfers\n", |
| 1069 | hostdata->madapter_info.srp_version); |
| 1070 | dev_err(hostdata->dev, "limiting scatterlists to %d\n", |
| 1071 | MAX_INDIRECT_BUFS); |
Dave C Boutcher | 154fb61 | 2005-09-13 10:09:02 -0500 | [diff] [blame] | 1072 | hostdata->host->sg_tablesize = MAX_INDIRECT_BUFS; |
| 1073 | } |
Brian King | e08afeb | 2009-06-23 17:14:01 -0500 | [diff] [blame] | 1074 | |
| 1075 | if (hostdata->madapter_info.os_type == 3) { |
| 1076 | enable_fast_fail(hostdata); |
| 1077 | return; |
| 1078 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1079 | } |
Brian King | 3507e13 | 2009-06-08 16:19:04 -0500 | [diff] [blame] | 1080 | |
Brian King | e08afeb | 2009-06-23 17:14:01 -0500 | [diff] [blame] | 1081 | send_srp_login(hostdata); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1082 | } |
| 1083 | |
| 1084 | /** |
| 1085 | * send_mad_adapter_info: - Sends the mad adapter info request |
| 1086 | * and stores the result so it can be retrieved with |
| 1087 | * sysfs. We COULD consider causing a failure if the |
| 1088 | * returned SRP version doesn't match ours. |
| 1089 | * @hostdata: ibmvscsi_host_data of host |
| 1090 | * |
| 1091 | * Returns zero if successful. |
| 1092 | */ |
| 1093 | static void send_mad_adapter_info(struct ibmvscsi_host_data *hostdata) |
| 1094 | { |
| 1095 | struct viosrp_adapter_info *req; |
| 1096 | struct srp_event_struct *evt_struct; |
Brian King | 06f923c | 2007-06-13 17:12:33 -0500 | [diff] [blame] | 1097 | unsigned long flags; |
FUJITA Tomonori | e5dbfa6 | 2006-04-14 13:52:18 +0900 | [diff] [blame] | 1098 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1099 | evt_struct = get_event_struct(&hostdata->pool); |
Brian King | 3507e13 | 2009-06-08 16:19:04 -0500 | [diff] [blame] | 1100 | BUG_ON(!evt_struct); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1101 | |
| 1102 | init_event_struct(evt_struct, |
| 1103 | adapter_info_rsp, |
| 1104 | VIOSRP_MAD_FORMAT, |
Robert Jennings | e1a5ce5 | 2009-06-08 16:19:03 -0500 | [diff] [blame] | 1105 | info_timeout); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1106 | |
| 1107 | req = &evt_struct->iu.mad.adapter_info; |
| 1108 | memset(req, 0x00, sizeof(*req)); |
| 1109 | |
| 1110 | req->common.type = VIOSRP_ADAPTER_INFO_TYPE; |
| 1111 | req->common.length = sizeof(hostdata->madapter_info); |
Brian King | 126c5cc | 2009-06-08 16:19:08 -0500 | [diff] [blame] | 1112 | req->buffer = hostdata->adapter_info_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1113 | |
Brian King | 06f923c | 2007-06-13 17:12:33 -0500 | [diff] [blame] | 1114 | spin_lock_irqsave(hostdata->host->host_lock, flags); |
Brian King | 126c5cc | 2009-06-08 16:19:08 -0500 | [diff] [blame] | 1115 | if (ibmvscsi_send_srp_event(evt_struct, hostdata, info_timeout * 2)) |
Brian King | 6c0a60e | 2007-06-13 17:12:19 -0500 | [diff] [blame] | 1116 | dev_err(hostdata->dev, "couldn't send ADAPTER_INFO_REQ!\n"); |
Brian King | 06f923c | 2007-06-13 17:12:33 -0500 | [diff] [blame] | 1117 | spin_unlock_irqrestore(hostdata->host->host_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1118 | }; |
| 1119 | |
| 1120 | /** |
Brian King | 3507e13 | 2009-06-08 16:19:04 -0500 | [diff] [blame] | 1121 | * init_adapter: Start virtual adapter initialization sequence |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1122 | * |
Brian King | 3507e13 | 2009-06-08 16:19:04 -0500 | [diff] [blame] | 1123 | */ |
| 1124 | static void init_adapter(struct ibmvscsi_host_data *hostdata) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1125 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1126 | send_mad_adapter_info(hostdata); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1127 | } |
| 1128 | |
| 1129 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1130 | * sync_completion: Signal that a synchronous command has completed |
| 1131 | * Note that after returning from this call, the evt_struct is freed. |
| 1132 | * the caller waiting on this completion shouldn't touch the evt_struct |
| 1133 | * again. |
| 1134 | */ |
| 1135 | static void sync_completion(struct srp_event_struct *evt_struct) |
| 1136 | { |
| 1137 | /* copy the response back */ |
| 1138 | if (evt_struct->sync_srp) |
| 1139 | *evt_struct->sync_srp = *evt_struct->xfer_iu; |
| 1140 | |
| 1141 | complete(&evt_struct->comp); |
| 1142 | } |
| 1143 | |
| 1144 | /** |
| 1145 | * ibmvscsi_abort: Abort a command...from scsi host template |
| 1146 | * send this over to the server and wait synchronously for the response |
| 1147 | */ |
| 1148 | static int ibmvscsi_eh_abort_handler(struct scsi_cmnd *cmd) |
| 1149 | { |
FUJITA Tomonori | 7603e02 | 2007-07-23 09:28:40 +0900 | [diff] [blame] | 1150 | struct ibmvscsi_host_data *hostdata = shost_priv(cmd->device->host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1151 | struct srp_tsk_mgmt *tsk_mgmt; |
| 1152 | struct srp_event_struct *evt; |
| 1153 | struct srp_event_struct *tmp_evt, *found_evt; |
| 1154 | union viosrp_iu srp_rsp; |
| 1155 | int rsp_rc; |
Dave C Boutcher | be042f2 | 2005-08-15 16:52:58 -0500 | [diff] [blame] | 1156 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1157 | u16 lun = lun_from_dev(cmd->device); |
Robert Jennings | 860784c | 2007-11-12 09:00:23 -0600 | [diff] [blame] | 1158 | unsigned long wait_switch = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1159 | |
| 1160 | /* First, find this command in our sent list so we can figure |
| 1161 | * out the correct tag |
| 1162 | */ |
Dave C Boutcher | be042f2 | 2005-08-15 16:52:58 -0500 | [diff] [blame] | 1163 | spin_lock_irqsave(hostdata->host->host_lock, flags); |
Robert Jennings | 860784c | 2007-11-12 09:00:23 -0600 | [diff] [blame] | 1164 | wait_switch = jiffies + (init_timeout * HZ); |
| 1165 | do { |
| 1166 | found_evt = NULL; |
| 1167 | list_for_each_entry(tmp_evt, &hostdata->sent, list) { |
| 1168 | if (tmp_evt->cmnd == cmd) { |
| 1169 | found_evt = tmp_evt; |
| 1170 | break; |
| 1171 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1172 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1173 | |
Robert Jennings | 860784c | 2007-11-12 09:00:23 -0600 | [diff] [blame] | 1174 | if (!found_evt) { |
| 1175 | spin_unlock_irqrestore(hostdata->host->host_lock, flags); |
| 1176 | return SUCCESS; |
| 1177 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1178 | |
Robert Jennings | 860784c | 2007-11-12 09:00:23 -0600 | [diff] [blame] | 1179 | evt = get_event_struct(&hostdata->pool); |
| 1180 | if (evt == NULL) { |
| 1181 | spin_unlock_irqrestore(hostdata->host->host_lock, flags); |
| 1182 | sdev_printk(KERN_ERR, cmd->device, |
| 1183 | "failed to allocate abort event\n"); |
| 1184 | return FAILED; |
| 1185 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1186 | |
Robert Jennings | 860784c | 2007-11-12 09:00:23 -0600 | [diff] [blame] | 1187 | init_event_struct(evt, |
| 1188 | sync_completion, |
| 1189 | VIOSRP_SRP_FORMAT, |
Robert Jennings | e1a5ce5 | 2009-06-08 16:19:03 -0500 | [diff] [blame] | 1190 | abort_timeout); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1191 | |
Robert Jennings | 860784c | 2007-11-12 09:00:23 -0600 | [diff] [blame] | 1192 | tsk_mgmt = &evt->iu.srp.tsk_mgmt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1193 | |
Robert Jennings | 860784c | 2007-11-12 09:00:23 -0600 | [diff] [blame] | 1194 | /* Set up an abort SRP command */ |
| 1195 | memset(tsk_mgmt, 0x00, sizeof(*tsk_mgmt)); |
| 1196 | tsk_mgmt->opcode = SRP_TSK_MGMT; |
| 1197 | tsk_mgmt->lun = ((u64) lun) << 48; |
| 1198 | tsk_mgmt->tsk_mgmt_func = SRP_TSK_ABORT_TASK; |
| 1199 | tsk_mgmt->task_tag = (u64) found_evt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1200 | |
Robert Jennings | 860784c | 2007-11-12 09:00:23 -0600 | [diff] [blame] | 1201 | evt->sync_srp = &srp_rsp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1202 | |
Robert Jennings | 860784c | 2007-11-12 09:00:23 -0600 | [diff] [blame] | 1203 | init_completion(&evt->comp); |
Robert Jennings | e1a5ce5 | 2009-06-08 16:19:03 -0500 | [diff] [blame] | 1204 | rsp_rc = ibmvscsi_send_srp_event(evt, hostdata, abort_timeout * 2); |
Robert Jennings | 860784c | 2007-11-12 09:00:23 -0600 | [diff] [blame] | 1205 | |
| 1206 | if (rsp_rc != SCSI_MLQUEUE_HOST_BUSY) |
| 1207 | break; |
| 1208 | |
| 1209 | spin_unlock_irqrestore(hostdata->host->host_lock, flags); |
| 1210 | msleep(10); |
| 1211 | spin_lock_irqsave(hostdata->host->host_lock, flags); |
| 1212 | } while (time_before(jiffies, wait_switch)); |
| 1213 | |
Dave C Boutcher | be042f2 | 2005-08-15 16:52:58 -0500 | [diff] [blame] | 1214 | spin_unlock_irqrestore(hostdata->host->host_lock, flags); |
Robert Jennings | 860784c | 2007-11-12 09:00:23 -0600 | [diff] [blame] | 1215 | |
Dave C Boutcher | be042f2 | 2005-08-15 16:52:58 -0500 | [diff] [blame] | 1216 | if (rsp_rc != 0) { |
Brian King | 6c0a60e | 2007-06-13 17:12:19 -0500 | [diff] [blame] | 1217 | sdev_printk(KERN_ERR, cmd->device, |
| 1218 | "failed to send abort() event. rc=%d\n", rsp_rc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1219 | return FAILED; |
| 1220 | } |
| 1221 | |
Robert Jennings | 860784c | 2007-11-12 09:00:23 -0600 | [diff] [blame] | 1222 | sdev_printk(KERN_INFO, cmd->device, |
Ingo Molnar | fe33332 | 2009-01-06 14:26:03 +0000 | [diff] [blame] | 1223 | "aborting command. lun 0x%llx, tag 0x%llx\n", |
Robert Jennings | 860784c | 2007-11-12 09:00:23 -0600 | [diff] [blame] | 1224 | (((u64) lun) << 48), (u64) found_evt); |
| 1225 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1226 | wait_for_completion(&evt->comp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1227 | |
| 1228 | /* make sure we got a good response */ |
FUJITA Tomonori | ef26567 | 2006-03-26 03:57:14 +0900 | [diff] [blame] | 1229 | if (unlikely(srp_rsp.srp.rsp.opcode != SRP_RSP)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1230 | if (printk_ratelimit()) |
Brian King | 6c0a60e | 2007-06-13 17:12:19 -0500 | [diff] [blame] | 1231 | sdev_printk(KERN_WARNING, cmd->device, "abort bad SRP RSP type %d\n", |
| 1232 | srp_rsp.srp.rsp.opcode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1233 | return FAILED; |
| 1234 | } |
| 1235 | |
FUJITA Tomonori | ef26567 | 2006-03-26 03:57:14 +0900 | [diff] [blame] | 1236 | if (srp_rsp.srp.rsp.flags & SRP_RSP_FLAG_RSPVALID) |
| 1237 | rsp_rc = *((int *)srp_rsp.srp.rsp.data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1238 | else |
| 1239 | rsp_rc = srp_rsp.srp.rsp.status; |
| 1240 | |
| 1241 | if (rsp_rc) { |
| 1242 | if (printk_ratelimit()) |
Brian King | 6c0a60e | 2007-06-13 17:12:19 -0500 | [diff] [blame] | 1243 | sdev_printk(KERN_WARNING, cmd->device, |
Ingo Molnar | fe33332 | 2009-01-06 14:26:03 +0000 | [diff] [blame] | 1244 | "abort code %d for task tag 0x%llx\n", |
Brian King | 6c0a60e | 2007-06-13 17:12:19 -0500 | [diff] [blame] | 1245 | rsp_rc, tsk_mgmt->task_tag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1246 | return FAILED; |
| 1247 | } |
| 1248 | |
| 1249 | /* Because we dropped the spinlock above, it's possible |
| 1250 | * The event is no longer in our list. Make sure it didn't |
| 1251 | * complete while we were aborting |
| 1252 | */ |
Dave C Boutcher | be042f2 | 2005-08-15 16:52:58 -0500 | [diff] [blame] | 1253 | spin_lock_irqsave(hostdata->host->host_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1254 | found_evt = NULL; |
| 1255 | list_for_each_entry(tmp_evt, &hostdata->sent, list) { |
| 1256 | if (tmp_evt->cmnd == cmd) { |
| 1257 | found_evt = tmp_evt; |
| 1258 | break; |
| 1259 | } |
| 1260 | } |
| 1261 | |
| 1262 | if (found_evt == NULL) { |
Dave C Boutcher | be042f2 | 2005-08-15 16:52:58 -0500 | [diff] [blame] | 1263 | spin_unlock_irqrestore(hostdata->host->host_lock, flags); |
Ingo Molnar | fe33332 | 2009-01-06 14:26:03 +0000 | [diff] [blame] | 1264 | sdev_printk(KERN_INFO, cmd->device, "aborted task tag 0x%llx completed\n", |
Brian King | 6c0a60e | 2007-06-13 17:12:19 -0500 | [diff] [blame] | 1265 | tsk_mgmt->task_tag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1266 | return SUCCESS; |
| 1267 | } |
| 1268 | |
Ingo Molnar | fe33332 | 2009-01-06 14:26:03 +0000 | [diff] [blame] | 1269 | sdev_printk(KERN_INFO, cmd->device, "successfully aborted task tag 0x%llx\n", |
Brian King | 6c0a60e | 2007-06-13 17:12:19 -0500 | [diff] [blame] | 1270 | tsk_mgmt->task_tag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1271 | |
| 1272 | cmd->result = (DID_ABORT << 16); |
| 1273 | list_del(&found_evt->list); |
James Bottomley | 4dddbc2 | 2005-09-06 17:11:54 -0500 | [diff] [blame] | 1274 | unmap_cmd_data(&found_evt->iu.srp.cmd, found_evt, |
| 1275 | found_evt->hostdata->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1276 | free_event_struct(&found_evt->hostdata->pool, found_evt); |
Dave C Boutcher | be042f2 | 2005-08-15 16:52:58 -0500 | [diff] [blame] | 1277 | spin_unlock_irqrestore(hostdata->host->host_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1278 | atomic_inc(&hostdata->request_limit); |
| 1279 | return SUCCESS; |
| 1280 | } |
| 1281 | |
| 1282 | /** |
| 1283 | * ibmvscsi_eh_device_reset_handler: Reset a single LUN...from scsi host |
| 1284 | * template send this over to the server and wait synchronously for the |
| 1285 | * response |
| 1286 | */ |
| 1287 | static int ibmvscsi_eh_device_reset_handler(struct scsi_cmnd *cmd) |
| 1288 | { |
FUJITA Tomonori | 7603e02 | 2007-07-23 09:28:40 +0900 | [diff] [blame] | 1289 | struct ibmvscsi_host_data *hostdata = shost_priv(cmd->device->host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1290 | struct srp_tsk_mgmt *tsk_mgmt; |
| 1291 | struct srp_event_struct *evt; |
| 1292 | struct srp_event_struct *tmp_evt, *pos; |
| 1293 | union viosrp_iu srp_rsp; |
| 1294 | int rsp_rc; |
Dave C Boutcher | be042f2 | 2005-08-15 16:52:58 -0500 | [diff] [blame] | 1295 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1296 | u16 lun = lun_from_dev(cmd->device); |
Robert Jennings | 860784c | 2007-11-12 09:00:23 -0600 | [diff] [blame] | 1297 | unsigned long wait_switch = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1298 | |
Dave C Boutcher | be042f2 | 2005-08-15 16:52:58 -0500 | [diff] [blame] | 1299 | spin_lock_irqsave(hostdata->host->host_lock, flags); |
Robert Jennings | 860784c | 2007-11-12 09:00:23 -0600 | [diff] [blame] | 1300 | wait_switch = jiffies + (init_timeout * HZ); |
| 1301 | do { |
| 1302 | evt = get_event_struct(&hostdata->pool); |
| 1303 | if (evt == NULL) { |
| 1304 | spin_unlock_irqrestore(hostdata->host->host_lock, flags); |
| 1305 | sdev_printk(KERN_ERR, cmd->device, |
| 1306 | "failed to allocate reset event\n"); |
| 1307 | return FAILED; |
| 1308 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1309 | |
Robert Jennings | 860784c | 2007-11-12 09:00:23 -0600 | [diff] [blame] | 1310 | init_event_struct(evt, |
| 1311 | sync_completion, |
| 1312 | VIOSRP_SRP_FORMAT, |
Robert Jennings | e1a5ce5 | 2009-06-08 16:19:03 -0500 | [diff] [blame] | 1313 | reset_timeout); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1314 | |
Robert Jennings | 860784c | 2007-11-12 09:00:23 -0600 | [diff] [blame] | 1315 | tsk_mgmt = &evt->iu.srp.tsk_mgmt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1316 | |
Robert Jennings | 860784c | 2007-11-12 09:00:23 -0600 | [diff] [blame] | 1317 | /* Set up a lun reset SRP command */ |
| 1318 | memset(tsk_mgmt, 0x00, sizeof(*tsk_mgmt)); |
| 1319 | tsk_mgmt->opcode = SRP_TSK_MGMT; |
| 1320 | tsk_mgmt->lun = ((u64) lun) << 48; |
| 1321 | tsk_mgmt->tsk_mgmt_func = SRP_TSK_LUN_RESET; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1322 | |
Robert Jennings | 860784c | 2007-11-12 09:00:23 -0600 | [diff] [blame] | 1323 | evt->sync_srp = &srp_rsp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1324 | |
Robert Jennings | 860784c | 2007-11-12 09:00:23 -0600 | [diff] [blame] | 1325 | init_completion(&evt->comp); |
Robert Jennings | e1a5ce5 | 2009-06-08 16:19:03 -0500 | [diff] [blame] | 1326 | rsp_rc = ibmvscsi_send_srp_event(evt, hostdata, reset_timeout * 2); |
Robert Jennings | 860784c | 2007-11-12 09:00:23 -0600 | [diff] [blame] | 1327 | |
| 1328 | if (rsp_rc != SCSI_MLQUEUE_HOST_BUSY) |
| 1329 | break; |
| 1330 | |
| 1331 | spin_unlock_irqrestore(hostdata->host->host_lock, flags); |
| 1332 | msleep(10); |
| 1333 | spin_lock_irqsave(hostdata->host->host_lock, flags); |
| 1334 | } while (time_before(jiffies, wait_switch)); |
| 1335 | |
Dave C Boutcher | be042f2 | 2005-08-15 16:52:58 -0500 | [diff] [blame] | 1336 | spin_unlock_irqrestore(hostdata->host->host_lock, flags); |
Robert Jennings | 860784c | 2007-11-12 09:00:23 -0600 | [diff] [blame] | 1337 | |
Dave C Boutcher | be042f2 | 2005-08-15 16:52:58 -0500 | [diff] [blame] | 1338 | if (rsp_rc != 0) { |
Brian King | 6c0a60e | 2007-06-13 17:12:19 -0500 | [diff] [blame] | 1339 | sdev_printk(KERN_ERR, cmd->device, |
| 1340 | "failed to send reset event. rc=%d\n", rsp_rc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1341 | return FAILED; |
| 1342 | } |
| 1343 | |
Ingo Molnar | fe33332 | 2009-01-06 14:26:03 +0000 | [diff] [blame] | 1344 | sdev_printk(KERN_INFO, cmd->device, "resetting device. lun 0x%llx\n", |
Robert Jennings | 860784c | 2007-11-12 09:00:23 -0600 | [diff] [blame] | 1345 | (((u64) lun) << 48)); |
| 1346 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1347 | wait_for_completion(&evt->comp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1348 | |
| 1349 | /* make sure we got a good response */ |
FUJITA Tomonori | ef26567 | 2006-03-26 03:57:14 +0900 | [diff] [blame] | 1350 | if (unlikely(srp_rsp.srp.rsp.opcode != SRP_RSP)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1351 | if (printk_ratelimit()) |
Brian King | 6c0a60e | 2007-06-13 17:12:19 -0500 | [diff] [blame] | 1352 | sdev_printk(KERN_WARNING, cmd->device, "reset bad SRP RSP type %d\n", |
| 1353 | srp_rsp.srp.rsp.opcode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1354 | return FAILED; |
| 1355 | } |
| 1356 | |
FUJITA Tomonori | ef26567 | 2006-03-26 03:57:14 +0900 | [diff] [blame] | 1357 | if (srp_rsp.srp.rsp.flags & SRP_RSP_FLAG_RSPVALID) |
| 1358 | rsp_rc = *((int *)srp_rsp.srp.rsp.data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1359 | else |
| 1360 | rsp_rc = srp_rsp.srp.rsp.status; |
| 1361 | |
| 1362 | if (rsp_rc) { |
| 1363 | if (printk_ratelimit()) |
Brian King | 6c0a60e | 2007-06-13 17:12:19 -0500 | [diff] [blame] | 1364 | sdev_printk(KERN_WARNING, cmd->device, |
Ingo Molnar | fe33332 | 2009-01-06 14:26:03 +0000 | [diff] [blame] | 1365 | "reset code %d for task tag 0x%llx\n", |
Brian King | 6c0a60e | 2007-06-13 17:12:19 -0500 | [diff] [blame] | 1366 | rsp_rc, tsk_mgmt->task_tag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1367 | return FAILED; |
| 1368 | } |
| 1369 | |
| 1370 | /* We need to find all commands for this LUN that have not yet been |
| 1371 | * responded to, and fail them with DID_RESET |
| 1372 | */ |
Dave C Boutcher | be042f2 | 2005-08-15 16:52:58 -0500 | [diff] [blame] | 1373 | spin_lock_irqsave(hostdata->host->host_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1374 | list_for_each_entry_safe(tmp_evt, pos, &hostdata->sent, list) { |
| 1375 | if ((tmp_evt->cmnd) && (tmp_evt->cmnd->device == cmd->device)) { |
| 1376 | if (tmp_evt->cmnd) |
| 1377 | tmp_evt->cmnd->result = (DID_RESET << 16); |
| 1378 | list_del(&tmp_evt->list); |
James Bottomley | 4dddbc2 | 2005-09-06 17:11:54 -0500 | [diff] [blame] | 1379 | unmap_cmd_data(&tmp_evt->iu.srp.cmd, tmp_evt, |
| 1380 | tmp_evt->hostdata->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1381 | free_event_struct(&tmp_evt->hostdata->pool, |
| 1382 | tmp_evt); |
| 1383 | atomic_inc(&hostdata->request_limit); |
| 1384 | if (tmp_evt->cmnd_done) |
| 1385 | tmp_evt->cmnd_done(tmp_evt->cmnd); |
| 1386 | else if (tmp_evt->done) |
| 1387 | tmp_evt->done(tmp_evt); |
| 1388 | } |
| 1389 | } |
Dave C Boutcher | be042f2 | 2005-08-15 16:52:58 -0500 | [diff] [blame] | 1390 | spin_unlock_irqrestore(hostdata->host->host_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1391 | return SUCCESS; |
| 1392 | } |
| 1393 | |
| 1394 | /** |
Brian King | 3d0e91f | 2007-06-13 17:12:26 -0500 | [diff] [blame] | 1395 | * ibmvscsi_eh_host_reset_handler - Reset the connection to the server |
| 1396 | * @cmd: struct scsi_cmnd having problems |
| 1397 | */ |
| 1398 | static int ibmvscsi_eh_host_reset_handler(struct scsi_cmnd *cmd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1399 | { |
Brian King | 3d0e91f | 2007-06-13 17:12:26 -0500 | [diff] [blame] | 1400 | unsigned long wait_switch = 0; |
FUJITA Tomonori | 7603e02 | 2007-07-23 09:28:40 +0900 | [diff] [blame] | 1401 | struct ibmvscsi_host_data *hostdata = shost_priv(cmd->device->host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1402 | |
Brian King | 3d0e91f | 2007-06-13 17:12:26 -0500 | [diff] [blame] | 1403 | dev_err(hostdata->dev, "Resetting connection due to error recovery\n"); |
| 1404 | |
| 1405 | ibmvscsi_reset_host(hostdata); |
| 1406 | |
| 1407 | for (wait_switch = jiffies + (init_timeout * HZ); |
| 1408 | time_before(jiffies, wait_switch) && |
| 1409 | atomic_read(&hostdata->request_limit) < 2;) { |
| 1410 | |
| 1411 | msleep(10); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1412 | } |
Brian King | 3d0e91f | 2007-06-13 17:12:26 -0500 | [diff] [blame] | 1413 | |
| 1414 | if (atomic_read(&hostdata->request_limit) <= 0) |
| 1415 | return FAILED; |
| 1416 | |
| 1417 | return SUCCESS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1418 | } |
| 1419 | |
| 1420 | /** |
| 1421 | * ibmvscsi_handle_crq: - Handles and frees received events in the CRQ |
| 1422 | * @crq: Command/Response queue |
| 1423 | * @hostdata: ibmvscsi_host_data of host |
| 1424 | * |
| 1425 | */ |
| 1426 | void ibmvscsi_handle_crq(struct viosrp_crq *crq, |
| 1427 | struct ibmvscsi_host_data *hostdata) |
| 1428 | { |
Brian King | 6c0a60e | 2007-06-13 17:12:19 -0500 | [diff] [blame] | 1429 | long rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1430 | unsigned long flags; |
| 1431 | struct srp_event_struct *evt_struct = |
| 1432 | (struct srp_event_struct *)crq->IU_data_ptr; |
| 1433 | switch (crq->valid) { |
| 1434 | case 0xC0: /* initialization */ |
| 1435 | switch (crq->format) { |
| 1436 | case 0x01: /* Initialization message */ |
Brian King | 6c0a60e | 2007-06-13 17:12:19 -0500 | [diff] [blame] | 1437 | dev_info(hostdata->dev, "partner initialized\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1438 | /* Send back a response */ |
David Woodhouse | d3849d5 | 2007-09-22 08:29:36 +1000 | [diff] [blame] | 1439 | if ((rc = ibmvscsi_ops->send_crq(hostdata, |
| 1440 | 0xC002000000000000LL, 0)) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1441 | /* Now login */ |
Brian King | 3507e13 | 2009-06-08 16:19:04 -0500 | [diff] [blame] | 1442 | init_adapter(hostdata); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1443 | } else { |
Brian King | 6c0a60e | 2007-06-13 17:12:19 -0500 | [diff] [blame] | 1444 | dev_err(hostdata->dev, "Unable to send init rsp. rc=%ld\n", rc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1445 | } |
| 1446 | |
| 1447 | break; |
| 1448 | case 0x02: /* Initialization response */ |
Brian King | 6c0a60e | 2007-06-13 17:12:19 -0500 | [diff] [blame] | 1449 | dev_info(hostdata->dev, "partner initialization complete\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1450 | |
| 1451 | /* Now login */ |
Brian King | 3507e13 | 2009-06-08 16:19:04 -0500 | [diff] [blame] | 1452 | init_adapter(hostdata); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1453 | break; |
| 1454 | default: |
Brian King | 6c0a60e | 2007-06-13 17:12:19 -0500 | [diff] [blame] | 1455 | dev_err(hostdata->dev, "unknown crq message type: %d\n", crq->format); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1456 | } |
| 1457 | return; |
Dave C Boutcher | 2b541f8 | 2006-01-19 13:34:44 -0600 | [diff] [blame] | 1458 | case 0xFF: /* Hypervisor telling us the connection is closed */ |
| 1459 | scsi_block_requests(hostdata->host); |
Dave C Boutcher | cefbda2 | 2006-06-12 21:22:51 -0500 | [diff] [blame] | 1460 | atomic_set(&hostdata->request_limit, 0); |
Dave C Boutcher | 2b541f8 | 2006-01-19 13:34:44 -0600 | [diff] [blame] | 1461 | if (crq->format == 0x06) { |
| 1462 | /* We need to re-setup the interpartition connection */ |
Brian King | 6c0a60e | 2007-06-13 17:12:19 -0500 | [diff] [blame] | 1463 | dev_info(hostdata->dev, "Re-enabling adapter!\n"); |
Brian King | 126c5cc | 2009-06-08 16:19:08 -0500 | [diff] [blame] | 1464 | hostdata->client_migrated = 1; |
Dave C Boutcher | 2b541f8 | 2006-01-19 13:34:44 -0600 | [diff] [blame] | 1465 | purge_requests(hostdata, DID_REQUEUE); |
David Woodhouse | d3849d5 | 2007-09-22 08:29:36 +1000 | [diff] [blame] | 1466 | if ((ibmvscsi_ops->reenable_crq_queue(&hostdata->queue, |
| 1467 | hostdata)) || |
| 1468 | (ibmvscsi_ops->send_crq(hostdata, |
| 1469 | 0xC001000000000000LL, 0))) { |
Dave C Boutcher | cefbda2 | 2006-06-12 21:22:51 -0500 | [diff] [blame] | 1470 | atomic_set(&hostdata->request_limit, |
| 1471 | -1); |
Brian King | 6c0a60e | 2007-06-13 17:12:19 -0500 | [diff] [blame] | 1472 | dev_err(hostdata->dev, "error after enable\n"); |
Dave C Boutcher | cefbda2 | 2006-06-12 21:22:51 -0500 | [diff] [blame] | 1473 | } |
Dave C Boutcher | 2b541f8 | 2006-01-19 13:34:44 -0600 | [diff] [blame] | 1474 | } else { |
Brian King | 6c0a60e | 2007-06-13 17:12:19 -0500 | [diff] [blame] | 1475 | dev_err(hostdata->dev, "Virtual adapter failed rc %d!\n", |
| 1476 | crq->format); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1477 | |
Dave C Boutcher | 2b541f8 | 2006-01-19 13:34:44 -0600 | [diff] [blame] | 1478 | purge_requests(hostdata, DID_ERROR); |
David Woodhouse | d3849d5 | 2007-09-22 08:29:36 +1000 | [diff] [blame] | 1479 | if ((ibmvscsi_ops->reset_crq_queue(&hostdata->queue, |
| 1480 | hostdata)) || |
| 1481 | (ibmvscsi_ops->send_crq(hostdata, |
| 1482 | 0xC001000000000000LL, 0))) { |
Dave C Boutcher | cefbda2 | 2006-06-12 21:22:51 -0500 | [diff] [blame] | 1483 | atomic_set(&hostdata->request_limit, |
| 1484 | -1); |
Brian King | 6c0a60e | 2007-06-13 17:12:19 -0500 | [diff] [blame] | 1485 | dev_err(hostdata->dev, "error after reset\n"); |
Dave C Boutcher | cefbda2 | 2006-06-12 21:22:51 -0500 | [diff] [blame] | 1486 | } |
Dave C Boutcher | 2b541f8 | 2006-01-19 13:34:44 -0600 | [diff] [blame] | 1487 | } |
| 1488 | scsi_unblock_requests(hostdata->host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1489 | return; |
| 1490 | case 0x80: /* real payload */ |
| 1491 | break; |
| 1492 | default: |
Brian King | 6c0a60e | 2007-06-13 17:12:19 -0500 | [diff] [blame] | 1493 | dev_err(hostdata->dev, "got an invalid message type 0x%02x\n", |
| 1494 | crq->valid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1495 | return; |
| 1496 | } |
| 1497 | |
| 1498 | /* The only kind of payload CRQs we should get are responses to |
| 1499 | * things we send. Make sure this response is to something we |
| 1500 | * actually sent |
| 1501 | */ |
| 1502 | if (!valid_event_struct(&hostdata->pool, evt_struct)) { |
Brian King | 6c0a60e | 2007-06-13 17:12:19 -0500 | [diff] [blame] | 1503 | dev_err(hostdata->dev, "returned correlation_token 0x%p is invalid!\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1504 | (void *)crq->IU_data_ptr); |
| 1505 | return; |
| 1506 | } |
| 1507 | |
| 1508 | if (atomic_read(&evt_struct->free)) { |
Brian King | 6c0a60e | 2007-06-13 17:12:19 -0500 | [diff] [blame] | 1509 | dev_err(hostdata->dev, "received duplicate correlation_token 0x%p!\n", |
| 1510 | (void *)crq->IU_data_ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1511 | return; |
| 1512 | } |
| 1513 | |
| 1514 | if (crq->format == VIOSRP_SRP_FORMAT) |
FUJITA Tomonori | ef26567 | 2006-03-26 03:57:14 +0900 | [diff] [blame] | 1515 | atomic_add(evt_struct->xfer_iu->srp.rsp.req_lim_delta, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1516 | &hostdata->request_limit); |
| 1517 | |
Brian King | 3d0e91f | 2007-06-13 17:12:26 -0500 | [diff] [blame] | 1518 | del_timer(&evt_struct->timer); |
| 1519 | |
Brian King | ca61668 | 2008-05-19 10:27:56 -0500 | [diff] [blame] | 1520 | if ((crq->status != VIOSRP_OK && crq->status != VIOSRP_OK2) && evt_struct->cmnd) |
Brian King | c3a3b55 | 2008-04-25 16:58:29 -0500 | [diff] [blame] | 1521 | evt_struct->cmnd->result = DID_ERROR << 16; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1522 | if (evt_struct->done) |
| 1523 | evt_struct->done(evt_struct); |
| 1524 | else |
Brian King | 6c0a60e | 2007-06-13 17:12:19 -0500 | [diff] [blame] | 1525 | dev_err(hostdata->dev, "returned done() is NULL; not running it!\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1526 | |
| 1527 | /* |
| 1528 | * Lock the host_lock before messing with these structures, since we |
| 1529 | * are running in a task context |
| 1530 | */ |
| 1531 | spin_lock_irqsave(evt_struct->hostdata->host->host_lock, flags); |
| 1532 | list_del(&evt_struct->list); |
| 1533 | free_event_struct(&evt_struct->hostdata->pool, evt_struct); |
| 1534 | spin_unlock_irqrestore(evt_struct->hostdata->host->host_lock, flags); |
| 1535 | } |
| 1536 | |
| 1537 | /** |
| 1538 | * ibmvscsi_get_host_config: Send the command to the server to get host |
| 1539 | * configuration data. The data is opaque to us. |
| 1540 | */ |
| 1541 | static int ibmvscsi_do_host_config(struct ibmvscsi_host_data *hostdata, |
| 1542 | unsigned char *buffer, int length) |
| 1543 | { |
| 1544 | struct viosrp_host_config *host_config; |
| 1545 | struct srp_event_struct *evt_struct; |
Brian King | 06f923c | 2007-06-13 17:12:33 -0500 | [diff] [blame] | 1546 | unsigned long flags; |
FUJITA Tomonori | e5dbfa6 | 2006-04-14 13:52:18 +0900 | [diff] [blame] | 1547 | dma_addr_t addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1548 | int rc; |
| 1549 | |
| 1550 | evt_struct = get_event_struct(&hostdata->pool); |
| 1551 | if (!evt_struct) { |
Brian King | 6c0a60e | 2007-06-13 17:12:19 -0500 | [diff] [blame] | 1552 | dev_err(hostdata->dev, "couldn't allocate event for HOST_CONFIG!\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1553 | return -1; |
| 1554 | } |
| 1555 | |
| 1556 | init_event_struct(evt_struct, |
| 1557 | sync_completion, |
| 1558 | VIOSRP_MAD_FORMAT, |
Robert Jennings | e1a5ce5 | 2009-06-08 16:19:03 -0500 | [diff] [blame] | 1559 | info_timeout); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1560 | |
| 1561 | host_config = &evt_struct->iu.mad.host_config; |
| 1562 | |
| 1563 | /* Set up a lun reset SRP command */ |
| 1564 | memset(host_config, 0x00, sizeof(*host_config)); |
| 1565 | host_config->common.type = VIOSRP_HOST_CONFIG_TYPE; |
| 1566 | host_config->common.length = length; |
FUJITA Tomonori | e5dbfa6 | 2006-04-14 13:52:18 +0900 | [diff] [blame] | 1567 | host_config->buffer = addr = dma_map_single(hostdata->dev, buffer, |
| 1568 | length, |
| 1569 | DMA_BIDIRECTIONAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1570 | |
FUJITA Tomonori | 8d8bb39 | 2008-07-25 19:44:49 -0700 | [diff] [blame] | 1571 | if (dma_mapping_error(hostdata->dev, host_config->buffer)) { |
Robert Jennings | 7912a0a | 2008-07-24 04:35:27 +1000 | [diff] [blame] | 1572 | if (!firmware_has_feature(FW_FEATURE_CMO)) |
| 1573 | dev_err(hostdata->dev, |
| 1574 | "dma_mapping error getting host config\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1575 | free_event_struct(&hostdata->pool, evt_struct); |
| 1576 | return -1; |
| 1577 | } |
| 1578 | |
| 1579 | init_completion(&evt_struct->comp); |
Brian King | 06f923c | 2007-06-13 17:12:33 -0500 | [diff] [blame] | 1580 | spin_lock_irqsave(hostdata->host->host_lock, flags); |
Robert Jennings | e1a5ce5 | 2009-06-08 16:19:03 -0500 | [diff] [blame] | 1581 | rc = ibmvscsi_send_srp_event(evt_struct, hostdata, info_timeout * 2); |
Brian King | 06f923c | 2007-06-13 17:12:33 -0500 | [diff] [blame] | 1582 | spin_unlock_irqrestore(hostdata->host->host_lock, flags); |
FUJITA Tomonori | e5dbfa6 | 2006-04-14 13:52:18 +0900 | [diff] [blame] | 1583 | if (rc == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1584 | wait_for_completion(&evt_struct->comp); |
FUJITA Tomonori | e5dbfa6 | 2006-04-14 13:52:18 +0900 | [diff] [blame] | 1585 | dma_unmap_single(hostdata->dev, addr, length, DMA_BIDIRECTIONAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1586 | |
| 1587 | return rc; |
| 1588 | } |
| 1589 | |
Robert Jennings | 0979c84 | 2007-03-29 12:30:40 -0500 | [diff] [blame] | 1590 | /** |
| 1591 | * ibmvscsi_slave_configure: Set the "allow_restart" flag for each disk. |
| 1592 | * @sdev: struct scsi_device device to configure |
| 1593 | * |
| 1594 | * Enable allow_restart for a device if it is a disk. Adjust the |
| 1595 | * queue_depth here also as is required by the documentation for |
| 1596 | * struct scsi_host_template. |
| 1597 | */ |
| 1598 | static int ibmvscsi_slave_configure(struct scsi_device *sdev) |
| 1599 | { |
| 1600 | struct Scsi_Host *shost = sdev->host; |
| 1601 | unsigned long lock_flags = 0; |
| 1602 | |
| 1603 | spin_lock_irqsave(shost->host_lock, lock_flags); |
Brian King | d1a357f | 2007-10-25 16:06:34 -0500 | [diff] [blame] | 1604 | if (sdev->type == TYPE_DISK) { |
Robert Jennings | 0979c84 | 2007-03-29 12:30:40 -0500 | [diff] [blame] | 1605 | sdev->allow_restart = 1; |
Robert Jennings | e1a5ce5 | 2009-06-08 16:19:03 -0500 | [diff] [blame] | 1606 | blk_queue_rq_timeout(sdev->request_queue, 120 * HZ); |
Brian King | d1a357f | 2007-10-25 16:06:34 -0500 | [diff] [blame] | 1607 | } |
Robert Jennings | 0979c84 | 2007-03-29 12:30:40 -0500 | [diff] [blame] | 1608 | scsi_adjust_queue_depth(sdev, 0, shost->cmd_per_lun); |
| 1609 | spin_unlock_irqrestore(shost->host_lock, lock_flags); |
| 1610 | return 0; |
| 1611 | } |
| 1612 | |
Brian King | 742d25b | 2007-05-29 15:46:14 -0500 | [diff] [blame] | 1613 | /** |
| 1614 | * ibmvscsi_change_queue_depth - Change the device's queue depth |
| 1615 | * @sdev: scsi device struct |
| 1616 | * @qdepth: depth to set |
Mike Christie | e881a17 | 2009-10-15 17:46:39 -0700 | [diff] [blame] | 1617 | * @reason: calling context |
Brian King | 742d25b | 2007-05-29 15:46:14 -0500 | [diff] [blame] | 1618 | * |
| 1619 | * Return value: |
| 1620 | * actual depth set |
| 1621 | **/ |
Mike Christie | e881a17 | 2009-10-15 17:46:39 -0700 | [diff] [blame] | 1622 | static int ibmvscsi_change_queue_depth(struct scsi_device *sdev, int qdepth, |
| 1623 | int reason) |
Brian King | 742d25b | 2007-05-29 15:46:14 -0500 | [diff] [blame] | 1624 | { |
Mike Christie | e881a17 | 2009-10-15 17:46:39 -0700 | [diff] [blame] | 1625 | if (reason != SCSI_QDEPTH_DEFAULT) |
| 1626 | return -EOPNOTSUPP; |
| 1627 | |
Brian King | 742d25b | 2007-05-29 15:46:14 -0500 | [diff] [blame] | 1628 | if (qdepth > IBMVSCSI_MAX_CMDS_PER_LUN) |
| 1629 | qdepth = IBMVSCSI_MAX_CMDS_PER_LUN; |
| 1630 | |
| 1631 | scsi_adjust_queue_depth(sdev, 0, qdepth); |
| 1632 | return sdev->queue_depth; |
| 1633 | } |
| 1634 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1635 | /* ------------------------------------------------------------ |
| 1636 | * sysfs attributes |
| 1637 | */ |
Brian King | 126c5cc | 2009-06-08 16:19:08 -0500 | [diff] [blame] | 1638 | static ssize_t show_host_vhost_loc(struct device *dev, |
| 1639 | struct device_attribute *attr, char *buf) |
| 1640 | { |
| 1641 | struct Scsi_Host *shost = class_to_shost(dev); |
| 1642 | struct ibmvscsi_host_data *hostdata = shost_priv(shost); |
| 1643 | int len; |
| 1644 | |
| 1645 | len = snprintf(buf, sizeof(hostdata->caps.loc), "%s\n", |
| 1646 | hostdata->caps.loc); |
| 1647 | return len; |
| 1648 | } |
| 1649 | |
| 1650 | static struct device_attribute ibmvscsi_host_vhost_loc = { |
| 1651 | .attr = { |
| 1652 | .name = "vhost_loc", |
| 1653 | .mode = S_IRUGO, |
| 1654 | }, |
| 1655 | .show = show_host_vhost_loc, |
| 1656 | }; |
| 1657 | |
| 1658 | static ssize_t show_host_vhost_name(struct device *dev, |
| 1659 | struct device_attribute *attr, char *buf) |
| 1660 | { |
| 1661 | struct Scsi_Host *shost = class_to_shost(dev); |
| 1662 | struct ibmvscsi_host_data *hostdata = shost_priv(shost); |
| 1663 | int len; |
| 1664 | |
| 1665 | len = snprintf(buf, sizeof(hostdata->caps.name), "%s\n", |
| 1666 | hostdata->caps.name); |
| 1667 | return len; |
| 1668 | } |
| 1669 | |
| 1670 | static struct device_attribute ibmvscsi_host_vhost_name = { |
| 1671 | .attr = { |
| 1672 | .name = "vhost_name", |
| 1673 | .mode = S_IRUGO, |
| 1674 | }, |
| 1675 | .show = show_host_vhost_name, |
| 1676 | }; |
| 1677 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 1678 | static ssize_t show_host_srp_version(struct device *dev, |
| 1679 | struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1680 | { |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 1681 | struct Scsi_Host *shost = class_to_shost(dev); |
FUJITA Tomonori | 7603e02 | 2007-07-23 09:28:40 +0900 | [diff] [blame] | 1682 | struct ibmvscsi_host_data *hostdata = shost_priv(shost); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1683 | int len; |
| 1684 | |
| 1685 | len = snprintf(buf, PAGE_SIZE, "%s\n", |
| 1686 | hostdata->madapter_info.srp_version); |
| 1687 | return len; |
| 1688 | } |
| 1689 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 1690 | static struct device_attribute ibmvscsi_host_srp_version = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1691 | .attr = { |
| 1692 | .name = "srp_version", |
| 1693 | .mode = S_IRUGO, |
| 1694 | }, |
| 1695 | .show = show_host_srp_version, |
| 1696 | }; |
| 1697 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 1698 | static ssize_t show_host_partition_name(struct device *dev, |
| 1699 | struct device_attribute *attr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1700 | char *buf) |
| 1701 | { |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 1702 | struct Scsi_Host *shost = class_to_shost(dev); |
FUJITA Tomonori | 7603e02 | 2007-07-23 09:28:40 +0900 | [diff] [blame] | 1703 | struct ibmvscsi_host_data *hostdata = shost_priv(shost); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1704 | int len; |
| 1705 | |
| 1706 | len = snprintf(buf, PAGE_SIZE, "%s\n", |
| 1707 | hostdata->madapter_info.partition_name); |
| 1708 | return len; |
| 1709 | } |
| 1710 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 1711 | static struct device_attribute ibmvscsi_host_partition_name = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1712 | .attr = { |
| 1713 | .name = "partition_name", |
| 1714 | .mode = S_IRUGO, |
| 1715 | }, |
| 1716 | .show = show_host_partition_name, |
| 1717 | }; |
| 1718 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 1719 | static ssize_t show_host_partition_number(struct device *dev, |
| 1720 | struct device_attribute *attr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1721 | char *buf) |
| 1722 | { |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 1723 | struct Scsi_Host *shost = class_to_shost(dev); |
FUJITA Tomonori | 7603e02 | 2007-07-23 09:28:40 +0900 | [diff] [blame] | 1724 | struct ibmvscsi_host_data *hostdata = shost_priv(shost); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1725 | int len; |
| 1726 | |
| 1727 | len = snprintf(buf, PAGE_SIZE, "%d\n", |
| 1728 | hostdata->madapter_info.partition_number); |
| 1729 | return len; |
| 1730 | } |
| 1731 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 1732 | static struct device_attribute ibmvscsi_host_partition_number = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1733 | .attr = { |
| 1734 | .name = "partition_number", |
| 1735 | .mode = S_IRUGO, |
| 1736 | }, |
| 1737 | .show = show_host_partition_number, |
| 1738 | }; |
| 1739 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 1740 | static ssize_t show_host_mad_version(struct device *dev, |
| 1741 | struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1742 | { |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 1743 | struct Scsi_Host *shost = class_to_shost(dev); |
FUJITA Tomonori | 7603e02 | 2007-07-23 09:28:40 +0900 | [diff] [blame] | 1744 | struct ibmvscsi_host_data *hostdata = shost_priv(shost); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1745 | int len; |
| 1746 | |
| 1747 | len = snprintf(buf, PAGE_SIZE, "%d\n", |
| 1748 | hostdata->madapter_info.mad_version); |
| 1749 | return len; |
| 1750 | } |
| 1751 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 1752 | static struct device_attribute ibmvscsi_host_mad_version = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1753 | .attr = { |
| 1754 | .name = "mad_version", |
| 1755 | .mode = S_IRUGO, |
| 1756 | }, |
| 1757 | .show = show_host_mad_version, |
| 1758 | }; |
| 1759 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 1760 | static ssize_t show_host_os_type(struct device *dev, |
| 1761 | struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1762 | { |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 1763 | struct Scsi_Host *shost = class_to_shost(dev); |
FUJITA Tomonori | 7603e02 | 2007-07-23 09:28:40 +0900 | [diff] [blame] | 1764 | struct ibmvscsi_host_data *hostdata = shost_priv(shost); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1765 | int len; |
| 1766 | |
| 1767 | len = snprintf(buf, PAGE_SIZE, "%d\n", hostdata->madapter_info.os_type); |
| 1768 | return len; |
| 1769 | } |
| 1770 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 1771 | static struct device_attribute ibmvscsi_host_os_type = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1772 | .attr = { |
| 1773 | .name = "os_type", |
| 1774 | .mode = S_IRUGO, |
| 1775 | }, |
| 1776 | .show = show_host_os_type, |
| 1777 | }; |
| 1778 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 1779 | static ssize_t show_host_config(struct device *dev, |
| 1780 | struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1781 | { |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 1782 | struct Scsi_Host *shost = class_to_shost(dev); |
FUJITA Tomonori | 7603e02 | 2007-07-23 09:28:40 +0900 | [diff] [blame] | 1783 | struct ibmvscsi_host_data *hostdata = shost_priv(shost); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1784 | |
| 1785 | /* returns null-terminated host config data */ |
| 1786 | if (ibmvscsi_do_host_config(hostdata, buf, PAGE_SIZE) == 0) |
| 1787 | return strlen(buf); |
| 1788 | else |
| 1789 | return 0; |
| 1790 | } |
| 1791 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 1792 | static struct device_attribute ibmvscsi_host_config = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1793 | .attr = { |
| 1794 | .name = "config", |
| 1795 | .mode = S_IRUGO, |
| 1796 | }, |
| 1797 | .show = show_host_config, |
| 1798 | }; |
| 1799 | |
Tony Jones | ee959b0 | 2008-02-22 00:13:36 +0100 | [diff] [blame] | 1800 | static struct device_attribute *ibmvscsi_attrs[] = { |
Brian King | 126c5cc | 2009-06-08 16:19:08 -0500 | [diff] [blame] | 1801 | &ibmvscsi_host_vhost_loc, |
| 1802 | &ibmvscsi_host_vhost_name, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1803 | &ibmvscsi_host_srp_version, |
| 1804 | &ibmvscsi_host_partition_name, |
| 1805 | &ibmvscsi_host_partition_number, |
| 1806 | &ibmvscsi_host_mad_version, |
| 1807 | &ibmvscsi_host_os_type, |
| 1808 | &ibmvscsi_host_config, |
| 1809 | NULL |
| 1810 | }; |
| 1811 | |
| 1812 | /* ------------------------------------------------------------ |
| 1813 | * SCSI driver registration |
| 1814 | */ |
| 1815 | static struct scsi_host_template driver_template = { |
| 1816 | .module = THIS_MODULE, |
| 1817 | .name = "IBM POWER Virtual SCSI Adapter " IBMVSCSI_VERSION, |
| 1818 | .proc_name = "ibmvscsi", |
| 1819 | .queuecommand = ibmvscsi_queuecommand, |
| 1820 | .eh_abort_handler = ibmvscsi_eh_abort_handler, |
| 1821 | .eh_device_reset_handler = ibmvscsi_eh_device_reset_handler, |
Brian King | 3d0e91f | 2007-06-13 17:12:26 -0500 | [diff] [blame] | 1822 | .eh_host_reset_handler = ibmvscsi_eh_host_reset_handler, |
Robert Jennings | 0979c84 | 2007-03-29 12:30:40 -0500 | [diff] [blame] | 1823 | .slave_configure = ibmvscsi_slave_configure, |
Brian King | 742d25b | 2007-05-29 15:46:14 -0500 | [diff] [blame] | 1824 | .change_queue_depth = ibmvscsi_change_queue_depth, |
Robert Jennings | 7912a0a | 2008-07-24 04:35:27 +1000 | [diff] [blame] | 1825 | .cmd_per_lun = IBMVSCSI_CMDS_PER_LUN_DEFAULT, |
Robert Jennings | a897ff2 | 2007-03-28 12:45:46 -0500 | [diff] [blame] | 1826 | .can_queue = IBMVSCSI_MAX_REQUESTS_DEFAULT, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1827 | .this_id = -1, |
James Bottomley | 4dddbc2 | 2005-09-06 17:11:54 -0500 | [diff] [blame] | 1828 | .sg_tablesize = SG_ALL, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1829 | .use_clustering = ENABLE_CLUSTERING, |
| 1830 | .shost_attrs = ibmvscsi_attrs, |
| 1831 | }; |
| 1832 | |
| 1833 | /** |
Robert Jennings | 7912a0a | 2008-07-24 04:35:27 +1000 | [diff] [blame] | 1834 | * ibmvscsi_get_desired_dma - Calculate IO memory desired by the driver |
| 1835 | * |
| 1836 | * @vdev: struct vio_dev for the device whose desired IO mem is to be returned |
| 1837 | * |
| 1838 | * Return value: |
| 1839 | * Number of bytes of IO data the driver will need to perform well. |
| 1840 | */ |
| 1841 | static unsigned long ibmvscsi_get_desired_dma(struct vio_dev *vdev) |
| 1842 | { |
| 1843 | /* iu_storage data allocated in initialize_event_pool */ |
Brian King | 4f10aae | 2008-12-17 17:19:33 -0600 | [diff] [blame] | 1844 | unsigned long desired_io = max_events * sizeof(union viosrp_iu); |
Robert Jennings | 7912a0a | 2008-07-24 04:35:27 +1000 | [diff] [blame] | 1845 | |
| 1846 | /* add io space for sg data */ |
Brian King | 004dd5e | 2008-08-15 10:48:47 -0500 | [diff] [blame] | 1847 | desired_io += (IBMVSCSI_MAX_SECTORS_DEFAULT * 512 * |
Robert Jennings | 7912a0a | 2008-07-24 04:35:27 +1000 | [diff] [blame] | 1848 | IBMVSCSI_CMDS_PER_LUN_DEFAULT); |
| 1849 | |
| 1850 | return desired_io; |
| 1851 | } |
| 1852 | |
| 1853 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1854 | * Called by bus code for each adapter |
| 1855 | */ |
| 1856 | static int ibmvscsi_probe(struct vio_dev *vdev, const struct vio_device_id *id) |
| 1857 | { |
| 1858 | struct ibmvscsi_host_data *hostdata; |
| 1859 | struct Scsi_Host *host; |
| 1860 | struct device *dev = &vdev->dev; |
FUJITA Tomonori | 4d68041 | 2007-06-27 16:32:50 +0900 | [diff] [blame] | 1861 | struct srp_rport_identifiers ids; |
| 1862 | struct srp_rport *rport; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1863 | unsigned long wait_switch = 0; |
Dave C Boutcher | cefbda2 | 2006-06-12 21:22:51 -0500 | [diff] [blame] | 1864 | int rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1865 | |
Greg Kroah-Hartman | 559fde7 | 2009-05-04 12:40:54 -0700 | [diff] [blame] | 1866 | dev_set_drvdata(&vdev->dev, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1867 | |
| 1868 | host = scsi_host_alloc(&driver_template, sizeof(*hostdata)); |
| 1869 | if (!host) { |
Brian King | 6c0a60e | 2007-06-13 17:12:19 -0500 | [diff] [blame] | 1870 | dev_err(&vdev->dev, "couldn't allocate host data\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1871 | goto scsi_host_alloc_failed; |
| 1872 | } |
| 1873 | |
FUJITA Tomonori | 4d68041 | 2007-06-27 16:32:50 +0900 | [diff] [blame] | 1874 | host->transportt = ibmvscsi_transport_template; |
FUJITA Tomonori | 7603e02 | 2007-07-23 09:28:40 +0900 | [diff] [blame] | 1875 | hostdata = shost_priv(host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1876 | memset(hostdata, 0x00, sizeof(*hostdata)); |
| 1877 | INIT_LIST_HEAD(&hostdata->sent); |
| 1878 | hostdata->host = host; |
| 1879 | hostdata->dev = dev; |
| 1880 | atomic_set(&hostdata->request_limit, -1); |
Robert Jennings | 7912a0a | 2008-07-24 04:35:27 +1000 | [diff] [blame] | 1881 | hostdata->host->max_sectors = IBMVSCSI_MAX_SECTORS_DEFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1882 | |
Brian King | 126c5cc | 2009-06-08 16:19:08 -0500 | [diff] [blame] | 1883 | if (map_persist_bufs(hostdata)) { |
| 1884 | dev_err(&vdev->dev, "couldn't map persistent buffers\n"); |
| 1885 | goto persist_bufs_failed; |
| 1886 | } |
| 1887 | |
Brian King | 4f10aae | 2008-12-17 17:19:33 -0600 | [diff] [blame] | 1888 | rc = ibmvscsi_ops->init_crq_queue(&hostdata->queue, hostdata, max_events); |
Dave C Boutcher | cefbda2 | 2006-06-12 21:22:51 -0500 | [diff] [blame] | 1889 | if (rc != 0 && rc != H_RESOURCE) { |
Brian King | 6c0a60e | 2007-06-13 17:12:19 -0500 | [diff] [blame] | 1890 | dev_err(&vdev->dev, "couldn't initialize crq. rc=%d\n", rc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1891 | goto init_crq_failed; |
| 1892 | } |
Brian King | 4f10aae | 2008-12-17 17:19:33 -0600 | [diff] [blame] | 1893 | if (initialize_event_pool(&hostdata->pool, max_events, hostdata) != 0) { |
Brian King | 6c0a60e | 2007-06-13 17:12:19 -0500 | [diff] [blame] | 1894 | dev_err(&vdev->dev, "couldn't initialize event pool\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1895 | goto init_pool_failed; |
| 1896 | } |
| 1897 | |
| 1898 | host->max_lun = 8; |
| 1899 | host->max_id = max_id; |
| 1900 | host->max_channel = max_channel; |
Brian King | fbc56f0 | 2009-06-08 16:19:01 -0500 | [diff] [blame] | 1901 | host->max_cmd_len = 16; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1902 | |
| 1903 | if (scsi_add_host(hostdata->host, hostdata->dev)) |
| 1904 | goto add_host_failed; |
| 1905 | |
FUJITA Tomonori | 4d68041 | 2007-06-27 16:32:50 +0900 | [diff] [blame] | 1906 | /* we don't have a proper target_port_id so let's use the fake one */ |
| 1907 | memcpy(ids.port_id, hostdata->madapter_info.partition_name, |
| 1908 | sizeof(ids.port_id)); |
FUJITA Tomonori | aebd5e4 | 2007-07-11 15:08:15 +0900 | [diff] [blame] | 1909 | ids.roles = SRP_RPORT_ROLE_TARGET; |
FUJITA Tomonori | 4d68041 | 2007-06-27 16:32:50 +0900 | [diff] [blame] | 1910 | rport = srp_rport_add(host, &ids); |
| 1911 | if (IS_ERR(rport)) |
| 1912 | goto add_srp_port_failed; |
| 1913 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1914 | /* Try to send an initialization message. Note that this is allowed |
| 1915 | * to fail if the other end is not acive. In that case we don't |
| 1916 | * want to scan |
| 1917 | */ |
David Woodhouse | d3849d5 | 2007-09-22 08:29:36 +1000 | [diff] [blame] | 1918 | if (ibmvscsi_ops->send_crq(hostdata, 0xC001000000000000LL, 0) == 0 |
Dave C Boutcher | cefbda2 | 2006-06-12 21:22:51 -0500 | [diff] [blame] | 1919 | || rc == H_RESOURCE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1920 | /* |
| 1921 | * Wait around max init_timeout secs for the adapter to finish |
| 1922 | * initializing. When we are done initializing, we will have a |
| 1923 | * valid request_limit. We don't want Linux scanning before |
| 1924 | * we are ready. |
| 1925 | */ |
| 1926 | for (wait_switch = jiffies + (init_timeout * HZ); |
| 1927 | time_before(jiffies, wait_switch) && |
| 1928 | atomic_read(&hostdata->request_limit) < 2;) { |
| 1929 | |
| 1930 | msleep(10); |
| 1931 | } |
| 1932 | |
| 1933 | /* if we now have a valid request_limit, initiate a scan */ |
| 1934 | if (atomic_read(&hostdata->request_limit) > 0) |
| 1935 | scsi_scan_host(host); |
| 1936 | } |
| 1937 | |
Greg Kroah-Hartman | 559fde7 | 2009-05-04 12:40:54 -0700 | [diff] [blame] | 1938 | dev_set_drvdata(&vdev->dev, hostdata); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1939 | return 0; |
| 1940 | |
FUJITA Tomonori | 4d68041 | 2007-06-27 16:32:50 +0900 | [diff] [blame] | 1941 | add_srp_port_failed: |
| 1942 | scsi_remove_host(hostdata->host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1943 | add_host_failed: |
| 1944 | release_event_pool(&hostdata->pool, hostdata); |
| 1945 | init_pool_failed: |
Brian King | 4f10aae | 2008-12-17 17:19:33 -0600 | [diff] [blame] | 1946 | ibmvscsi_ops->release_crq_queue(&hostdata->queue, hostdata, max_events); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1947 | init_crq_failed: |
Brian King | 126c5cc | 2009-06-08 16:19:08 -0500 | [diff] [blame] | 1948 | unmap_persist_bufs(hostdata); |
| 1949 | persist_bufs_failed: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1950 | scsi_host_put(host); |
| 1951 | scsi_host_alloc_failed: |
| 1952 | return -1; |
| 1953 | } |
| 1954 | |
| 1955 | static int ibmvscsi_remove(struct vio_dev *vdev) |
| 1956 | { |
Greg Kroah-Hartman | 559fde7 | 2009-05-04 12:40:54 -0700 | [diff] [blame] | 1957 | struct ibmvscsi_host_data *hostdata = dev_get_drvdata(&vdev->dev); |
Brian King | 126c5cc | 2009-06-08 16:19:08 -0500 | [diff] [blame] | 1958 | unmap_persist_bufs(hostdata); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1959 | release_event_pool(&hostdata->pool, hostdata); |
David Woodhouse | d3849d5 | 2007-09-22 08:29:36 +1000 | [diff] [blame] | 1960 | ibmvscsi_ops->release_crq_queue(&hostdata->queue, hostdata, |
Brian King | 4f10aae | 2008-12-17 17:19:33 -0600 | [diff] [blame] | 1961 | max_events); |
FUJITA Tomonori | 4d68041 | 2007-06-27 16:32:50 +0900 | [diff] [blame] | 1962 | |
| 1963 | srp_remove_host(hostdata->host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1964 | scsi_remove_host(hostdata->host); |
| 1965 | scsi_host_put(hostdata->host); |
| 1966 | |
| 1967 | return 0; |
| 1968 | } |
| 1969 | |
| 1970 | /** |
Brian King | 64355b9 | 2010-02-21 10:37:57 -0600 | [diff] [blame] | 1971 | * ibmvscsi_resume: Resume from suspend |
| 1972 | * @dev: device struct |
| 1973 | * |
| 1974 | * We may have lost an interrupt across suspend/resume, so kick the |
| 1975 | * interrupt handler |
| 1976 | */ |
| 1977 | static int ibmvscsi_resume(struct device *dev) |
| 1978 | { |
| 1979 | struct ibmvscsi_host_data *hostdata = dev_get_drvdata(dev); |
| 1980 | return ibmvscsi_ops->resume(hostdata); |
| 1981 | } |
| 1982 | |
| 1983 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1984 | * ibmvscsi_device_table: Used by vio.c to match devices in the device tree we |
| 1985 | * support. |
| 1986 | */ |
| 1987 | static struct vio_device_id ibmvscsi_device_table[] __devinitdata = { |
| 1988 | {"vscsi", "IBM,v-scsi"}, |
Stephen Rothwell | fb120da | 2005-08-17 16:42:59 +1000 | [diff] [blame] | 1989 | { "", "" } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1990 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1991 | MODULE_DEVICE_TABLE(vio, ibmvscsi_device_table); |
Stephen Rothwell | 915124d | 2005-10-24 15:12:22 +1000 | [diff] [blame] | 1992 | |
Brian King | 64355b9 | 2010-02-21 10:37:57 -0600 | [diff] [blame] | 1993 | static struct dev_pm_ops ibmvscsi_pm_ops = { |
| 1994 | .resume = ibmvscsi_resume |
| 1995 | }; |
| 1996 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1997 | static struct vio_driver ibmvscsi_driver = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1998 | .id_table = ibmvscsi_device_table, |
| 1999 | .probe = ibmvscsi_probe, |
Stephen Rothwell | 6fdf539 | 2005-10-24 14:53:21 +1000 | [diff] [blame] | 2000 | .remove = ibmvscsi_remove, |
Robert Jennings | 7912a0a | 2008-07-24 04:35:27 +1000 | [diff] [blame] | 2001 | .get_desired_dma = ibmvscsi_get_desired_dma, |
Stephen Rothwell | 6fdf539 | 2005-10-24 14:53:21 +1000 | [diff] [blame] | 2002 | .driver = { |
| 2003 | .name = "ibmvscsi", |
Stephen Rothwell | 915124d | 2005-10-24 15:12:22 +1000 | [diff] [blame] | 2004 | .owner = THIS_MODULE, |
Brian King | 64355b9 | 2010-02-21 10:37:57 -0600 | [diff] [blame] | 2005 | .pm = &ibmvscsi_pm_ops, |
Stephen Rothwell | 6fdf539 | 2005-10-24 14:53:21 +1000 | [diff] [blame] | 2006 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2007 | }; |
| 2008 | |
FUJITA Tomonori | 4d68041 | 2007-06-27 16:32:50 +0900 | [diff] [blame] | 2009 | static struct srp_function_template ibmvscsi_transport_functions = { |
| 2010 | }; |
| 2011 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2012 | int __init ibmvscsi_module_init(void) |
| 2013 | { |
FUJITA Tomonori | 4d68041 | 2007-06-27 16:32:50 +0900 | [diff] [blame] | 2014 | int ret; |
| 2015 | |
Brian King | 4f10aae | 2008-12-17 17:19:33 -0600 | [diff] [blame] | 2016 | /* Ensure we have two requests to do error recovery */ |
| 2017 | driver_template.can_queue = max_requests; |
| 2018 | max_events = max_requests + 2; |
| 2019 | |
David Woodhouse | d3849d5 | 2007-09-22 08:29:36 +1000 | [diff] [blame] | 2020 | if (firmware_has_feature(FW_FEATURE_ISERIES)) |
| 2021 | ibmvscsi_ops = &iseriesvscsi_ops; |
| 2022 | else if (firmware_has_feature(FW_FEATURE_VIO)) |
| 2023 | ibmvscsi_ops = &rpavscsi_ops; |
| 2024 | else |
| 2025 | return -ENODEV; |
| 2026 | |
FUJITA Tomonori | 4d68041 | 2007-06-27 16:32:50 +0900 | [diff] [blame] | 2027 | ibmvscsi_transport_template = |
| 2028 | srp_attach_transport(&ibmvscsi_transport_functions); |
| 2029 | if (!ibmvscsi_transport_template) |
| 2030 | return -ENOMEM; |
| 2031 | |
| 2032 | ret = vio_register_driver(&ibmvscsi_driver); |
| 2033 | if (ret) |
| 2034 | srp_release_transport(ibmvscsi_transport_template); |
| 2035 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2036 | } |
| 2037 | |
| 2038 | void __exit ibmvscsi_module_exit(void) |
| 2039 | { |
| 2040 | vio_unregister_driver(&ibmvscsi_driver); |
FUJITA Tomonori | 4d68041 | 2007-06-27 16:32:50 +0900 | [diff] [blame] | 2041 | srp_release_transport(ibmvscsi_transport_template); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2042 | } |
| 2043 | |
| 2044 | module_init(ibmvscsi_module_init); |
| 2045 | module_exit(ibmvscsi_module_exit); |