Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright(c) 2007 Intel Corporation. All rights reserved. |
| 3 | * Copyright(c) 2008 Red Hat, Inc. All rights reserved. |
| 4 | * Copyright(c) 2008 Mike Christie |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms and conditions of the GNU General Public License, |
| 8 | * version 2, as published by the Free Software Foundation. |
| 9 | * |
| 10 | * This program is distributed in the hope it will be useful, but WITHOUT |
| 11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 13 | * more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License along with |
| 16 | * this program; if not, write to the Free Software Foundation, Inc., |
| 17 | * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. |
| 18 | * |
| 19 | * Maintained at www.Open-FCoE.org |
| 20 | */ |
| 21 | |
| 22 | #include <linux/module.h> |
| 23 | #include <linux/delay.h> |
| 24 | #include <linux/kernel.h> |
| 25 | #include <linux/types.h> |
| 26 | #include <linux/spinlock.h> |
| 27 | #include <linux/scatterlist.h> |
| 28 | #include <linux/err.h> |
| 29 | #include <linux/crc32.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 30 | #include <linux/slab.h> |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 31 | |
| 32 | #include <scsi/scsi_tcq.h> |
| 33 | #include <scsi/scsi.h> |
| 34 | #include <scsi/scsi_host.h> |
| 35 | #include <scsi/scsi_device.h> |
| 36 | #include <scsi/scsi_cmnd.h> |
| 37 | |
| 38 | #include <scsi/fc/fc_fc2.h> |
| 39 | |
| 40 | #include <scsi/libfc.h> |
| 41 | #include <scsi/fc_encode.h> |
| 42 | |
Robert Love | 8866a5d | 2009-11-03 11:45:58 -0800 | [diff] [blame] | 43 | #include "fc_libfc.h" |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 44 | |
Randy Dunlap | 5520490 | 2011-01-28 16:03:57 -0800 | [diff] [blame] | 45 | static struct kmem_cache *scsi_pkt_cachep; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 46 | |
| 47 | /* SRB state definitions */ |
| 48 | #define FC_SRB_FREE 0 /* cmd is free */ |
| 49 | #define FC_SRB_CMD_SENT (1 << 0) /* cmd has been sent */ |
| 50 | #define FC_SRB_RCV_STATUS (1 << 1) /* response has arrived */ |
| 51 | #define FC_SRB_ABORT_PENDING (1 << 2) /* cmd abort sent to device */ |
Daniel Mack | 3ad2f3f | 2010-02-03 08:01:28 +0800 | [diff] [blame] | 52 | #define FC_SRB_ABORTED (1 << 3) /* abort acknowledged */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 53 | #define FC_SRB_DISCONTIG (1 << 4) /* non-sequential data recvd */ |
| 54 | #define FC_SRB_COMPL (1 << 5) /* fc_io_compl has been run */ |
| 55 | #define FC_SRB_FCP_PROCESSING_TMO (1 << 6) /* timer function processing */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 56 | |
| 57 | #define FC_SRB_READ (1 << 1) |
| 58 | #define FC_SRB_WRITE (1 << 0) |
| 59 | |
| 60 | /* |
Vasu Dev | 8b7ac2b | 2010-10-08 17:12:31 -0700 | [diff] [blame] | 61 | * The SCp.ptr should be tested and set under the scsi_pkt_queue lock |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 62 | */ |
| 63 | #define CMD_SP(Cmnd) ((struct fc_fcp_pkt *)(Cmnd)->SCp.ptr) |
| 64 | #define CMD_ENTRY_STATUS(Cmnd) ((Cmnd)->SCp.have_data_in) |
| 65 | #define CMD_COMPL_STATUS(Cmnd) ((Cmnd)->SCp.this_residual) |
| 66 | #define CMD_SCSI_STATUS(Cmnd) ((Cmnd)->SCp.Status) |
| 67 | #define CMD_RESID_LEN(Cmnd) ((Cmnd)->SCp.buffers_residual) |
| 68 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 69 | /** |
| 70 | * struct fc_fcp_internal - FCP layer internal data |
Chris Leech | c1ecb90 | 2009-12-10 09:59:26 -0800 | [diff] [blame] | 71 | * @scsi_pkt_pool: Memory pool to draw FCP packets from |
| 72 | * @scsi_queue_lock: Protects the scsi_pkt_queue |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 73 | * @scsi_pkt_queue: Current FCP packets |
Vasu Dev | 84c3e1a | 2009-11-03 11:48:06 -0800 | [diff] [blame] | 74 | * @last_can_queue_ramp_down_time: ramp down time |
| 75 | * @last_can_queue_ramp_up_time: ramp up time |
| 76 | * @max_can_queue: max can_queue size |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 77 | */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 78 | struct fc_fcp_internal { |
Chris Leech | c1ecb90 | 2009-12-10 09:59:26 -0800 | [diff] [blame] | 79 | mempool_t *scsi_pkt_pool; |
| 80 | spinlock_t scsi_queue_lock; |
| 81 | struct list_head scsi_pkt_queue; |
| 82 | unsigned long last_can_queue_ramp_down_time; |
| 83 | unsigned long last_can_queue_ramp_up_time; |
| 84 | int max_can_queue; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 85 | }; |
| 86 | |
| 87 | #define fc_get_scsi_internal(x) ((struct fc_fcp_internal *)(x)->scsi_priv) |
| 88 | |
| 89 | /* |
| 90 | * function prototypes |
| 91 | * FC scsi I/O related functions |
| 92 | */ |
| 93 | static void fc_fcp_recv_data(struct fc_fcp_pkt *, struct fc_frame *); |
| 94 | static void fc_fcp_recv(struct fc_seq *, struct fc_frame *, void *); |
| 95 | static void fc_fcp_resp(struct fc_fcp_pkt *, struct fc_frame *); |
| 96 | static void fc_fcp_complete_locked(struct fc_fcp_pkt *); |
| 97 | static void fc_tm_done(struct fc_seq *, struct fc_frame *, void *); |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 98 | static void fc_fcp_error(struct fc_fcp_pkt *, struct fc_frame *); |
john fastabend | ac17ea8 | 2010-11-30 16:18:39 -0800 | [diff] [blame] | 99 | static void fc_fcp_recovery(struct fc_fcp_pkt *, u8 code); |
Kees Cook | 1f0849d | 2017-10-11 12:51:53 -0700 | [diff] [blame] | 100 | static void fc_fcp_timeout(struct timer_list *); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 101 | static void fc_fcp_rec(struct fc_fcp_pkt *); |
| 102 | static void fc_fcp_rec_error(struct fc_fcp_pkt *, struct fc_frame *); |
| 103 | static void fc_fcp_rec_resp(struct fc_seq *, struct fc_frame *, void *); |
| 104 | static void fc_io_compl(struct fc_fcp_pkt *); |
| 105 | |
| 106 | static void fc_fcp_srr(struct fc_fcp_pkt *, enum fc_rctl, u32); |
| 107 | static void fc_fcp_srr_resp(struct fc_seq *, struct fc_frame *, void *); |
| 108 | static void fc_fcp_srr_error(struct fc_fcp_pkt *, struct fc_frame *); |
| 109 | |
| 110 | /* |
| 111 | * command status codes |
| 112 | */ |
| 113 | #define FC_COMPLETE 0 |
| 114 | #define FC_CMD_ABORTED 1 |
| 115 | #define FC_CMD_RESET 2 |
| 116 | #define FC_CMD_PLOGO 3 |
| 117 | #define FC_SNS_RCV 4 |
| 118 | #define FC_TRANS_ERR 5 |
| 119 | #define FC_DATA_OVRRUN 6 |
| 120 | #define FC_DATA_UNDRUN 7 |
| 121 | #define FC_ERROR 8 |
| 122 | #define FC_HRD_ERROR 9 |
john fastabend | ac17ea8 | 2010-11-30 16:18:39 -0800 | [diff] [blame] | 123 | #define FC_CRC_ERROR 10 |
| 124 | #define FC_TIMED_OUT 11 |
Hannes Reinecke | a0452bb | 2016-10-13 15:10:38 +0200 | [diff] [blame] | 125 | #define FC_TRANS_RESET 12 |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 126 | |
| 127 | /* |
| 128 | * Error recovery timeout values. |
| 129 | */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 130 | #define FC_SCSI_TM_TOV (10 * HZ) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 131 | #define FC_HOST_RESET_TIMEOUT (30 * HZ) |
Vasu Dev | 84c3e1a | 2009-11-03 11:48:06 -0800 | [diff] [blame] | 132 | #define FC_CAN_QUEUE_PERIOD (60 * HZ) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 133 | |
| 134 | #define FC_MAX_ERROR_CNT 5 |
| 135 | #define FC_MAX_RECOV_RETRY 3 |
| 136 | |
| 137 | #define FC_FCP_DFLT_QUEUE_DEPTH 32 |
| 138 | |
| 139 | /** |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 140 | * fc_fcp_pkt_alloc() - Allocate a fcp_pkt |
| 141 | * @lport: The local port that the FCP packet is for |
| 142 | * @gfp: GFP flags for allocation |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 143 | * |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 144 | * Return value: fcp_pkt structure or null on allocation failure. |
| 145 | * Context: Can be called from process context, no lock is required. |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 146 | */ |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 147 | static struct fc_fcp_pkt *fc_fcp_pkt_alloc(struct fc_lport *lport, gfp_t gfp) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 148 | { |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 149 | struct fc_fcp_internal *si = fc_get_scsi_internal(lport); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 150 | struct fc_fcp_pkt *fsp; |
| 151 | |
| 152 | fsp = mempool_alloc(si->scsi_pkt_pool, gfp); |
| 153 | if (fsp) { |
| 154 | memset(fsp, 0, sizeof(*fsp)); |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 155 | fsp->lp = lport; |
Yi Zou | f56635a | 2011-01-28 16:03:15 -0800 | [diff] [blame] | 156 | fsp->xfer_ddp = FC_XID_UNKNOWN; |
Elena Reshetova | 22c70d1 | 2017-03-09 09:44:02 +0200 | [diff] [blame] | 157 | refcount_set(&fsp->ref_cnt, 1); |
Kees Cook | 1f0849d | 2017-10-11 12:51:53 -0700 | [diff] [blame] | 158 | timer_setup(&fsp->timer, NULL, 0); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 159 | INIT_LIST_HEAD(&fsp->list); |
| 160 | spin_lock_init(&fsp->scsi_pkt_lock); |
Vasu Dev | 0f02a66 | 2012-05-25 10:26:48 -0700 | [diff] [blame] | 161 | } else { |
| 162 | per_cpu_ptr(lport->stats, get_cpu())->FcpPktAllocFails++; |
| 163 | put_cpu(); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 164 | } |
| 165 | return fsp; |
| 166 | } |
| 167 | |
| 168 | /** |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 169 | * fc_fcp_pkt_release() - Release hold on a fcp_pkt |
| 170 | * @fsp: The FCP packet to be released |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 171 | * |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 172 | * Context: Can be called from process or interrupt context, |
| 173 | * no lock is required. |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 174 | */ |
| 175 | static void fc_fcp_pkt_release(struct fc_fcp_pkt *fsp) |
| 176 | { |
Elena Reshetova | 22c70d1 | 2017-03-09 09:44:02 +0200 | [diff] [blame] | 177 | if (refcount_dec_and_test(&fsp->ref_cnt)) { |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 178 | struct fc_fcp_internal *si = fc_get_scsi_internal(fsp->lp); |
| 179 | |
| 180 | mempool_free(fsp, si->scsi_pkt_pool); |
| 181 | } |
| 182 | } |
| 183 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 184 | /** |
| 185 | * fc_fcp_pkt_hold() - Hold a fcp_pkt |
| 186 | * @fsp: The FCP packet to be held |
| 187 | */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 188 | static void fc_fcp_pkt_hold(struct fc_fcp_pkt *fsp) |
| 189 | { |
Elena Reshetova | 22c70d1 | 2017-03-09 09:44:02 +0200 | [diff] [blame] | 190 | refcount_inc(&fsp->ref_cnt); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 191 | } |
| 192 | |
| 193 | /** |
Bart Van Assche | ce83a4c | 2015-06-05 14:20:40 -0700 | [diff] [blame] | 194 | * fc_fcp_pkt_destroy() - Release hold on a fcp_pkt |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 195 | * @seq: The sequence that the FCP packet is on (required by destructor API) |
| 196 | * @fsp: The FCP packet to be released |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 197 | * |
Hannes Reinecke | 3afd2d1 | 2016-10-18 10:01:38 +0200 | [diff] [blame] | 198 | * This routine is called by a destructor callback in the fc_exch_seq_send() |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 199 | * routine of the libfc Transport Template. The 'struct fc_seq' is a required |
| 200 | * argument even though it is not used by this routine. |
| 201 | * |
| 202 | * Context: No locking required. |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 203 | */ |
| 204 | static void fc_fcp_pkt_destroy(struct fc_seq *seq, void *fsp) |
| 205 | { |
| 206 | fc_fcp_pkt_release(fsp); |
| 207 | } |
| 208 | |
| 209 | /** |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 210 | * fc_fcp_lock_pkt() - Lock a fcp_pkt and increase its reference count |
| 211 | * @fsp: The FCP packet to be locked and incremented |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 212 | * |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 213 | * We should only return error if we return a command to SCSI-ml before |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 214 | * getting a response. This can happen in cases where we send a abort, but |
| 215 | * do not wait for the response and the abort and command can be passing |
| 216 | * each other on the wire/network-layer. |
| 217 | * |
| 218 | * Note: this function locks the packet and gets a reference to allow |
| 219 | * callers to call the completion function while the lock is held and |
| 220 | * not have to worry about the packets refcount. |
| 221 | * |
| 222 | * TODO: Maybe we should just have callers grab/release the lock and |
| 223 | * have a function that they call to verify the fsp and grab a ref if |
| 224 | * needed. |
| 225 | */ |
| 226 | static inline int fc_fcp_lock_pkt(struct fc_fcp_pkt *fsp) |
| 227 | { |
| 228 | spin_lock_bh(&fsp->scsi_pkt_lock); |
| 229 | if (fsp->state & FC_SRB_COMPL) { |
| 230 | spin_unlock_bh(&fsp->scsi_pkt_lock); |
| 231 | return -EPERM; |
| 232 | } |
| 233 | |
| 234 | fc_fcp_pkt_hold(fsp); |
| 235 | return 0; |
| 236 | } |
| 237 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 238 | /** |
| 239 | * fc_fcp_unlock_pkt() - Release a fcp_pkt's lock and decrement its |
| 240 | * reference count |
| 241 | * @fsp: The FCP packet to be unlocked and decremented |
| 242 | */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 243 | static inline void fc_fcp_unlock_pkt(struct fc_fcp_pkt *fsp) |
| 244 | { |
| 245 | spin_unlock_bh(&fsp->scsi_pkt_lock); |
| 246 | fc_fcp_pkt_release(fsp); |
| 247 | } |
| 248 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 249 | /** |
| 250 | * fc_fcp_timer_set() - Start a timer for a fcp_pkt |
| 251 | * @fsp: The FCP packet to start a timer for |
Vasu Dev | f2817ec | 2011-04-01 16:06:40 -0700 | [diff] [blame] | 252 | * @delay: The timeout period in jiffies |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 253 | */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 254 | static void fc_fcp_timer_set(struct fc_fcp_pkt *fsp, unsigned long delay) |
| 255 | { |
Hannes Reinecke | ad3120c | 2016-10-13 15:10:53 +0200 | [diff] [blame] | 256 | if (!(fsp->state & FC_SRB_COMPL)) { |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 257 | mod_timer(&fsp->timer, jiffies + delay); |
Hannes Reinecke | ad3120c | 2016-10-13 15:10:53 +0200 | [diff] [blame] | 258 | fsp->timer_delay = delay; |
| 259 | } |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 260 | } |
| 261 | |
Hannes Reinecke | d11b44e | 2016-10-13 15:10:51 +0200 | [diff] [blame] | 262 | static void fc_fcp_abort_done(struct fc_fcp_pkt *fsp) |
| 263 | { |
| 264 | fsp->state |= FC_SRB_ABORTED; |
| 265 | fsp->state &= ~FC_SRB_ABORT_PENDING; |
| 266 | |
| 267 | if (fsp->wait_for_comp) |
| 268 | complete(&fsp->tm_done); |
| 269 | else |
| 270 | fc_fcp_complete_locked(fsp); |
| 271 | } |
| 272 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 273 | /** |
| 274 | * fc_fcp_send_abort() - Send an abort for exchanges associated with a |
| 275 | * fcp_pkt |
| 276 | * @fsp: The FCP packet to abort exchanges on |
| 277 | */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 278 | static int fc_fcp_send_abort(struct fc_fcp_pkt *fsp) |
| 279 | { |
Hannes Reinecke | d11b44e | 2016-10-13 15:10:51 +0200 | [diff] [blame] | 280 | int rc; |
| 281 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 282 | if (!fsp->seq_ptr) |
| 283 | return -EINVAL; |
| 284 | |
Vasu Dev | 0f02a66 | 2012-05-25 10:26:48 -0700 | [diff] [blame] | 285 | per_cpu_ptr(fsp->lp->stats, get_cpu())->FcpPktAborts++; |
| 286 | put_cpu(); |
| 287 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 288 | fsp->state |= FC_SRB_ABORT_PENDING; |
Hannes Reinecke | 0ebaed1 | 2016-10-18 10:01:49 +0200 | [diff] [blame] | 289 | rc = fc_seq_exch_abort(fsp->seq_ptr, 0); |
Hannes Reinecke | d11b44e | 2016-10-13 15:10:51 +0200 | [diff] [blame] | 290 | /* |
Hannes Reinecke | 0ebaed1 | 2016-10-18 10:01:49 +0200 | [diff] [blame] | 291 | * fc_seq_exch_abort() might return -ENXIO if |
Hannes Reinecke | d11b44e | 2016-10-13 15:10:51 +0200 | [diff] [blame] | 292 | * the sequence is already completed |
| 293 | */ |
| 294 | if (rc == -ENXIO) { |
| 295 | fc_fcp_abort_done(fsp); |
| 296 | rc = 0; |
| 297 | } |
| 298 | return rc; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 299 | } |
| 300 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 301 | /** |
| 302 | * fc_fcp_retry_cmd() - Retry a fcp_pkt |
| 303 | * @fsp: The FCP packet to be retried |
| 304 | * |
| 305 | * Sets the status code to be FC_ERROR and then calls |
| 306 | * fc_fcp_complete_locked() which in turn calls fc_io_compl(). |
| 307 | * fc_io_compl() will notify the SCSI-ml that the I/O is done. |
| 308 | * The SCSI-ml will retry the command. |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 309 | */ |
Hannes Reinecke | a0452bb | 2016-10-13 15:10:38 +0200 | [diff] [blame] | 310 | static void fc_fcp_retry_cmd(struct fc_fcp_pkt *fsp, int status_code) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 311 | { |
| 312 | if (fsp->seq_ptr) { |
Hannes Reinecke | 768c72c | 2016-10-18 10:01:50 +0200 | [diff] [blame] | 313 | fc_exch_done(fsp->seq_ptr); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 314 | fsp->seq_ptr = NULL; |
| 315 | } |
| 316 | |
| 317 | fsp->state &= ~FC_SRB_ABORT_PENDING; |
Martin K. Petersen | 1c9fbaf | 2009-01-04 03:14:11 -0500 | [diff] [blame] | 318 | fsp->io_status = 0; |
Hannes Reinecke | a0452bb | 2016-10-13 15:10:38 +0200 | [diff] [blame] | 319 | fsp->status_code = status_code; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 320 | fc_fcp_complete_locked(fsp); |
| 321 | } |
| 322 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 323 | /** |
| 324 | * fc_fcp_ddp_setup() - Calls a LLD's ddp_setup routine to set up DDP context |
| 325 | * @fsp: The FCP packet that will manage the DDP frames |
| 326 | * @xid: The XID that will be used for the DDP exchange |
Yi Zou | b277d2a | 2009-02-27 14:07:21 -0800 | [diff] [blame] | 327 | */ |
| 328 | void fc_fcp_ddp_setup(struct fc_fcp_pkt *fsp, u16 xid) |
| 329 | { |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 330 | struct fc_lport *lport; |
Yi Zou | b277d2a | 2009-02-27 14:07:21 -0800 | [diff] [blame] | 331 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 332 | lport = fsp->lp; |
Yi Zou | b277d2a | 2009-02-27 14:07:21 -0800 | [diff] [blame] | 333 | if ((fsp->req_flags & FC_SRB_READ) && |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 334 | (lport->lro_enabled) && (lport->tt.ddp_setup)) { |
| 335 | if (lport->tt.ddp_setup(lport, xid, scsi_sglist(fsp->cmd), |
| 336 | scsi_sg_count(fsp->cmd))) |
Yi Zou | b277d2a | 2009-02-27 14:07:21 -0800 | [diff] [blame] | 337 | fsp->xfer_ddp = xid; |
| 338 | } |
| 339 | } |
Yi Zou | b277d2a | 2009-02-27 14:07:21 -0800 | [diff] [blame] | 340 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 341 | /** |
| 342 | * fc_fcp_ddp_done() - Calls a LLD's ddp_done routine to release any |
| 343 | * DDP related resources for a fcp_pkt |
| 344 | * @fsp: The FCP packet that DDP had been used on |
Yi Zou | b277d2a | 2009-02-27 14:07:21 -0800 | [diff] [blame] | 345 | */ |
Yi Zou | 6a716a8 | 2011-05-16 16:45:40 -0700 | [diff] [blame] | 346 | void fc_fcp_ddp_done(struct fc_fcp_pkt *fsp) |
Yi Zou | b277d2a | 2009-02-27 14:07:21 -0800 | [diff] [blame] | 347 | { |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 348 | struct fc_lport *lport; |
Yi Zou | b277d2a | 2009-02-27 14:07:21 -0800 | [diff] [blame] | 349 | |
| 350 | if (!fsp) |
| 351 | return; |
| 352 | |
Yi Zou | 5e472d0 | 2009-10-21 16:26:50 -0700 | [diff] [blame] | 353 | if (fsp->xfer_ddp == FC_XID_UNKNOWN) |
| 354 | return; |
| 355 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 356 | lport = fsp->lp; |
| 357 | if (lport->tt.ddp_done) { |
| 358 | fsp->xfer_len = lport->tt.ddp_done(lport, fsp->xfer_ddp); |
Yi Zou | 5e472d0 | 2009-10-21 16:26:50 -0700 | [diff] [blame] | 359 | fsp->xfer_ddp = FC_XID_UNKNOWN; |
Yi Zou | b277d2a | 2009-02-27 14:07:21 -0800 | [diff] [blame] | 360 | } |
| 361 | } |
| 362 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 363 | /** |
Vasu Dev | 84c3e1a | 2009-11-03 11:48:06 -0800 | [diff] [blame] | 364 | * fc_fcp_can_queue_ramp_up() - increases can_queue |
| 365 | * @lport: lport to ramp up can_queue |
Vasu Dev | 84c3e1a | 2009-11-03 11:48:06 -0800 | [diff] [blame] | 366 | */ |
| 367 | static void fc_fcp_can_queue_ramp_up(struct fc_lport *lport) |
| 368 | { |
| 369 | struct fc_fcp_internal *si = fc_get_scsi_internal(lport); |
Robert Love | 9c8cce8 | 2011-04-01 16:06:14 -0700 | [diff] [blame] | 370 | unsigned long flags; |
Vasu Dev | 84c3e1a | 2009-11-03 11:48:06 -0800 | [diff] [blame] | 371 | int can_queue; |
| 372 | |
Robert Love | 9c8cce8 | 2011-04-01 16:06:14 -0700 | [diff] [blame] | 373 | spin_lock_irqsave(lport->host->host_lock, flags); |
| 374 | |
Vasu Dev | 84c3e1a | 2009-11-03 11:48:06 -0800 | [diff] [blame] | 375 | if (si->last_can_queue_ramp_up_time && |
| 376 | (time_before(jiffies, si->last_can_queue_ramp_up_time + |
| 377 | FC_CAN_QUEUE_PERIOD))) |
Robert Love | 9c8cce8 | 2011-04-01 16:06:14 -0700 | [diff] [blame] | 378 | goto unlock; |
Vasu Dev | 84c3e1a | 2009-11-03 11:48:06 -0800 | [diff] [blame] | 379 | |
| 380 | if (time_before(jiffies, si->last_can_queue_ramp_down_time + |
| 381 | FC_CAN_QUEUE_PERIOD)) |
Robert Love | 9c8cce8 | 2011-04-01 16:06:14 -0700 | [diff] [blame] | 382 | goto unlock; |
Vasu Dev | 84c3e1a | 2009-11-03 11:48:06 -0800 | [diff] [blame] | 383 | |
| 384 | si->last_can_queue_ramp_up_time = jiffies; |
| 385 | |
| 386 | can_queue = lport->host->can_queue << 1; |
| 387 | if (can_queue >= si->max_can_queue) { |
| 388 | can_queue = si->max_can_queue; |
| 389 | si->last_can_queue_ramp_down_time = 0; |
| 390 | } |
| 391 | lport->host->can_queue = can_queue; |
| 392 | shost_printk(KERN_ERR, lport->host, "libfc: increased " |
| 393 | "can_queue to %d.\n", can_queue); |
Robert Love | 9c8cce8 | 2011-04-01 16:06:14 -0700 | [diff] [blame] | 394 | |
| 395 | unlock: |
| 396 | spin_unlock_irqrestore(lport->host->host_lock, flags); |
Vasu Dev | 84c3e1a | 2009-11-03 11:48:06 -0800 | [diff] [blame] | 397 | } |
| 398 | |
| 399 | /** |
Vasu Dev | c46be11 | 2009-11-03 11:48:00 -0800 | [diff] [blame] | 400 | * fc_fcp_can_queue_ramp_down() - reduces can_queue |
| 401 | * @lport: lport to reduce can_queue |
| 402 | * |
| 403 | * If we are getting memory allocation failures, then we may |
| 404 | * be trying to execute too many commands. We let the running |
| 405 | * commands complete or timeout, then try again with a reduced |
| 406 | * can_queue. Eventually we will hit the point where we run |
| 407 | * on all reserved structs. |
| 408 | */ |
Hannes Reinecke | c106125 | 2017-04-27 16:25:03 +0200 | [diff] [blame] | 409 | static bool fc_fcp_can_queue_ramp_down(struct fc_lport *lport) |
Vasu Dev | c46be11 | 2009-11-03 11:48:00 -0800 | [diff] [blame] | 410 | { |
| 411 | struct fc_fcp_internal *si = fc_get_scsi_internal(lport); |
Robert Love | 9c8cce8 | 2011-04-01 16:06:14 -0700 | [diff] [blame] | 412 | unsigned long flags; |
Vasu Dev | c46be11 | 2009-11-03 11:48:00 -0800 | [diff] [blame] | 413 | int can_queue; |
Hannes Reinecke | c106125 | 2017-04-27 16:25:03 +0200 | [diff] [blame] | 414 | bool changed = false; |
Vasu Dev | c46be11 | 2009-11-03 11:48:00 -0800 | [diff] [blame] | 415 | |
Robert Love | 9c8cce8 | 2011-04-01 16:06:14 -0700 | [diff] [blame] | 416 | spin_lock_irqsave(lport->host->host_lock, flags); |
| 417 | |
Vasu Dev | 84c3e1a | 2009-11-03 11:48:06 -0800 | [diff] [blame] | 418 | if (si->last_can_queue_ramp_down_time && |
| 419 | (time_before(jiffies, si->last_can_queue_ramp_down_time + |
| 420 | FC_CAN_QUEUE_PERIOD))) |
Robert Love | 9c8cce8 | 2011-04-01 16:06:14 -0700 | [diff] [blame] | 421 | goto unlock; |
Vasu Dev | 84c3e1a | 2009-11-03 11:48:06 -0800 | [diff] [blame] | 422 | |
| 423 | si->last_can_queue_ramp_down_time = jiffies; |
Vasu Dev | c46be11 | 2009-11-03 11:48:00 -0800 | [diff] [blame] | 424 | |
| 425 | can_queue = lport->host->can_queue; |
| 426 | can_queue >>= 1; |
| 427 | if (!can_queue) |
| 428 | can_queue = 1; |
| 429 | lport->host->can_queue = can_queue; |
Hannes Reinecke | c106125 | 2017-04-27 16:25:03 +0200 | [diff] [blame] | 430 | changed = true; |
Robert Love | 9c8cce8 | 2011-04-01 16:06:14 -0700 | [diff] [blame] | 431 | |
| 432 | unlock: |
| 433 | spin_unlock_irqrestore(lport->host->host_lock, flags); |
Hannes Reinecke | c106125 | 2017-04-27 16:25:03 +0200 | [diff] [blame] | 434 | return changed; |
Vasu Dev | c46be11 | 2009-11-03 11:48:00 -0800 | [diff] [blame] | 435 | } |
| 436 | |
| 437 | /* |
| 438 | * fc_fcp_frame_alloc() - Allocates fc_frame structure and buffer. |
| 439 | * @lport: fc lport struct |
| 440 | * @len: payload length |
| 441 | * |
| 442 | * Allocates fc_frame structure and buffer but if fails to allocate |
| 443 | * then reduce can_queue. |
| 444 | */ |
| 445 | static inline struct fc_frame *fc_fcp_frame_alloc(struct fc_lport *lport, |
| 446 | size_t len) |
| 447 | { |
| 448 | struct fc_frame *fp; |
| 449 | |
| 450 | fp = fc_frame_alloc(lport, len); |
Chris Leech | c1ecb90 | 2009-12-10 09:59:26 -0800 | [diff] [blame] | 451 | if (likely(fp)) |
| 452 | return fp; |
| 453 | |
Vasu Dev | 0f02a66 | 2012-05-25 10:26:48 -0700 | [diff] [blame] | 454 | per_cpu_ptr(lport->stats, get_cpu())->FcpFrameAllocFails++; |
| 455 | put_cpu(); |
Chris Leech | c1ecb90 | 2009-12-10 09:59:26 -0800 | [diff] [blame] | 456 | /* error case */ |
Chris Leech | c1ecb90 | 2009-12-10 09:59:26 -0800 | [diff] [blame] | 457 | fc_fcp_can_queue_ramp_down(lport); |
Hannes Reinecke | 5d339d1 | 2016-10-13 15:10:48 +0200 | [diff] [blame] | 458 | shost_printk(KERN_ERR, lport->host, |
| 459 | "libfc: Could not allocate frame, " |
| 460 | "reducing can_queue to %d.\n", lport->host->can_queue); |
Chris Leech | c1ecb90 | 2009-12-10 09:59:26 -0800 | [diff] [blame] | 461 | return NULL; |
Vasu Dev | c46be11 | 2009-11-03 11:48:00 -0800 | [diff] [blame] | 462 | } |
| 463 | |
| 464 | /** |
Hannes Reinecke | 87da3b8 | 2016-10-13 15:10:54 +0200 | [diff] [blame] | 465 | * get_fsp_rec_tov() - Helper function to get REC_TOV |
| 466 | * @fsp: the FCP packet |
| 467 | * |
| 468 | * Returns rec tov in jiffies as rpriv->e_d_tov + 1 second |
| 469 | */ |
| 470 | static inline unsigned int get_fsp_rec_tov(struct fc_fcp_pkt *fsp) |
| 471 | { |
| 472 | struct fc_rport_libfc_priv *rpriv = fsp->rport->dd_data; |
| 473 | unsigned int e_d_tov = FC_DEF_E_D_TOV; |
| 474 | |
| 475 | if (rpriv && rpriv->e_d_tov > e_d_tov) |
| 476 | e_d_tov = rpriv->e_d_tov; |
| 477 | return msecs_to_jiffies(e_d_tov) + HZ; |
| 478 | } |
| 479 | |
| 480 | /** |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 481 | * fc_fcp_recv_data() - Handler for receiving SCSI-FCP data from a target |
| 482 | * @fsp: The FCP packet the data is on |
| 483 | * @fp: The data frame |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 484 | */ |
| 485 | static void fc_fcp_recv_data(struct fc_fcp_pkt *fsp, struct fc_frame *fp) |
| 486 | { |
| 487 | struct scsi_cmnd *sc = fsp->cmd; |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 488 | struct fc_lport *lport = fsp->lp; |
Vasu Dev | 1bd49b4 | 2012-05-25 10:26:43 -0700 | [diff] [blame] | 489 | struct fc_stats *stats; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 490 | struct fc_frame_header *fh; |
| 491 | size_t start_offset; |
| 492 | size_t offset; |
| 493 | u32 crc; |
| 494 | u32 copy_len = 0; |
| 495 | size_t len; |
| 496 | void *buf; |
| 497 | struct scatterlist *sg; |
Robert Love | 5868287 | 2009-11-03 11:47:28 -0800 | [diff] [blame] | 498 | u32 nents; |
john fastabend | ac17ea8 | 2010-11-30 16:18:39 -0800 | [diff] [blame] | 499 | u8 host_bcode = FC_COMPLETE; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 500 | |
| 501 | fh = fc_frame_header_get(fp); |
| 502 | offset = ntohl(fh->fh_parm_offset); |
| 503 | start_offset = offset; |
| 504 | len = fr_len(fp) - sizeof(*fh); |
| 505 | buf = fc_frame_payload_get(fp, 0); |
| 506 | |
Vasu Dev | 5c12c41 | 2010-03-12 16:08:44 -0800 | [diff] [blame] | 507 | /* |
john fastabend | ac17ea8 | 2010-11-30 16:18:39 -0800 | [diff] [blame] | 508 | * if this I/O is ddped then clear it and initiate recovery since data |
| 509 | * frames are expected to be placed directly in that case. |
| 510 | * |
| 511 | * Indicate error to scsi-ml because something went wrong with the |
| 512 | * ddp handling to get us here. |
Vasu Dev | 5c12c41 | 2010-03-12 16:08:44 -0800 | [diff] [blame] | 513 | */ |
| 514 | if (fsp->xfer_ddp != FC_XID_UNKNOWN) { |
| 515 | fc_fcp_ddp_done(fsp); |
john fastabend | ac17ea8 | 2010-11-30 16:18:39 -0800 | [diff] [blame] | 516 | FC_FCP_DBG(fsp, "DDP I/O in fc_fcp_recv_data set ERROR\n"); |
| 517 | host_bcode = FC_ERROR; |
Vasu Dev | 5c12c41 | 2010-03-12 16:08:44 -0800 | [diff] [blame] | 518 | goto err; |
| 519 | } |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 520 | if (offset + len > fsp->data_len) { |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 521 | /* this should never happen */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 522 | if ((fr_flags(fp) & FCPHF_CRC_UNCHECKED) && |
| 523 | fc_frame_crc_check(fp)) |
| 524 | goto crc_err; |
Robert Love | 7414705 | 2009-06-10 15:31:10 -0700 | [diff] [blame] | 525 | FC_FCP_DBG(fsp, "data received past end. len %zx offset %zx " |
| 526 | "data_len %x\n", len, offset, fsp->data_len); |
john fastabend | ac17ea8 | 2010-11-30 16:18:39 -0800 | [diff] [blame] | 527 | |
| 528 | /* Data is corrupted indicate scsi-ml should retry */ |
| 529 | host_bcode = FC_DATA_OVRRUN; |
Vasu Dev | 5c12c41 | 2010-03-12 16:08:44 -0800 | [diff] [blame] | 530 | goto err; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 531 | } |
| 532 | if (offset != fsp->xfer_len) |
| 533 | fsp->state |= FC_SRB_DISCONTIG; |
| 534 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 535 | sg = scsi_sglist(sc); |
Robert Love | 5868287 | 2009-11-03 11:47:28 -0800 | [diff] [blame] | 536 | nents = scsi_sg_count(sc); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 537 | |
Robert Love | 5868287 | 2009-11-03 11:47:28 -0800 | [diff] [blame] | 538 | if (!(fr_flags(fp) & FCPHF_CRC_UNCHECKED)) { |
| 539 | copy_len = fc_copy_buffer_to_sglist(buf, len, sg, &nents, |
Cong Wang | 77dfce0 | 2011-11-25 23:14:23 +0800 | [diff] [blame] | 540 | &offset, NULL); |
Robert Love | 5868287 | 2009-11-03 11:47:28 -0800 | [diff] [blame] | 541 | } else { |
| 542 | crc = crc32(~0, (u8 *) fh, sizeof(*fh)); |
| 543 | copy_len = fc_copy_buffer_to_sglist(buf, len, sg, &nents, |
Cong Wang | 77dfce0 | 2011-11-25 23:14:23 +0800 | [diff] [blame] | 544 | &offset, &crc); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 545 | buf = fc_frame_payload_get(fp, 0); |
Robert Love | 5868287 | 2009-11-03 11:47:28 -0800 | [diff] [blame] | 546 | if (len % 4) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 547 | crc = crc32(crc, buf + len, 4 - (len % 4)); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 548 | |
| 549 | if (~crc != le32_to_cpu(fr_crc(fp))) { |
| 550 | crc_err: |
Vasu Dev | 1bd49b4 | 2012-05-25 10:26:43 -0700 | [diff] [blame] | 551 | stats = per_cpu_ptr(lport->stats, get_cpu()); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 552 | stats->ErrorFrames++; |
Joe Eykholt | f018b73 | 2010-03-12 16:08:55 -0800 | [diff] [blame] | 553 | /* per cpu count, not total count, but OK for limit */ |
Hillf Danton | 688fd36 | 2011-07-27 15:10:28 -0700 | [diff] [blame] | 554 | if (stats->InvalidCRCCount++ < FC_MAX_ERROR_CNT) |
Robert Love | 7414705 | 2009-06-10 15:31:10 -0700 | [diff] [blame] | 555 | printk(KERN_WARNING "libfc: CRC error on data " |
Chris Leech | ce8b5df | 2010-04-09 14:23:10 -0700 | [diff] [blame] | 556 | "frame for port (%6.6x)\n", |
Robert Love | 7b2787e | 2010-05-07 15:18:41 -0700 | [diff] [blame] | 557 | lport->port_id); |
Joe Eykholt | f018b73 | 2010-03-12 16:08:55 -0800 | [diff] [blame] | 558 | put_cpu(); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 559 | /* |
| 560 | * Assume the frame is total garbage. |
| 561 | * We may have copied it over the good part |
| 562 | * of the buffer. |
| 563 | * If so, we need to retry the entire operation. |
| 564 | * Otherwise, ignore it. |
| 565 | */ |
john fastabend | ac17ea8 | 2010-11-30 16:18:39 -0800 | [diff] [blame] | 566 | if (fsp->state & FC_SRB_DISCONTIG) { |
| 567 | host_bcode = FC_CRC_ERROR; |
Vasu Dev | 5c12c41 | 2010-03-12 16:08:44 -0800 | [diff] [blame] | 568 | goto err; |
john fastabend | ac17ea8 | 2010-11-30 16:18:39 -0800 | [diff] [blame] | 569 | } |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 570 | return; |
| 571 | } |
| 572 | } |
| 573 | |
| 574 | if (fsp->xfer_contig_end == start_offset) |
| 575 | fsp->xfer_contig_end += copy_len; |
| 576 | fsp->xfer_len += copy_len; |
| 577 | |
| 578 | /* |
| 579 | * In the very rare event that this data arrived after the response |
| 580 | * and completes the transfer, call the completion handler. |
| 581 | */ |
| 582 | if (unlikely(fsp->state & FC_SRB_RCV_STATUS) && |
Hannes Reinecke | 87da3b8 | 2016-10-13 15:10:54 +0200 | [diff] [blame] | 583 | fsp->xfer_len == fsp->data_len - fsp->scsi_resid) { |
| 584 | FC_FCP_DBG( fsp, "complete out-of-order sequence\n" ); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 585 | fc_fcp_complete_locked(fsp); |
Hannes Reinecke | 87da3b8 | 2016-10-13 15:10:54 +0200 | [diff] [blame] | 586 | } |
Vasu Dev | 5c12c41 | 2010-03-12 16:08:44 -0800 | [diff] [blame] | 587 | return; |
| 588 | err: |
john fastabend | ac17ea8 | 2010-11-30 16:18:39 -0800 | [diff] [blame] | 589 | fc_fcp_recovery(fsp, host_bcode); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 590 | } |
| 591 | |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 592 | /** |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 593 | * fc_fcp_send_data() - Send SCSI data to a target |
| 594 | * @fsp: The FCP packet the data is on |
| 595 | * @sp: The sequence the data is to be sent on |
| 596 | * @offset: The starting offset for this data request |
| 597 | * @seq_blen: The burst length for this data request |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 598 | * |
| 599 | * Called after receiving a Transfer Ready data descriptor. |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 600 | * If the LLD is capable of sequence offload then send down the |
Uwe Kleine-König | 9ddc5b6 | 2010-01-20 17:02:24 +0100 | [diff] [blame] | 601 | * seq_blen amount of data in single frame, otherwise send |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 602 | * multiple frames of the maximum frame payload supported by |
| 603 | * the target port. |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 604 | */ |
| 605 | static int fc_fcp_send_data(struct fc_fcp_pkt *fsp, struct fc_seq *seq, |
| 606 | size_t offset, size_t seq_blen) |
| 607 | { |
| 608 | struct fc_exch *ep; |
| 609 | struct scsi_cmnd *sc; |
| 610 | struct scatterlist *sg; |
| 611 | struct fc_frame *fp = NULL; |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 612 | struct fc_lport *lport = fsp->lp; |
Chris Leech | 18fa11e | 2009-11-03 11:50:05 -0800 | [diff] [blame] | 613 | struct page *page; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 614 | size_t remaining; |
| 615 | size_t t_blen; |
| 616 | size_t tlen; |
| 617 | size_t sg_bytes; |
| 618 | size_t frame_offset, fh_parm_offset; |
Chris Leech | 18fa11e | 2009-11-03 11:50:05 -0800 | [diff] [blame] | 619 | size_t off; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 620 | int error; |
| 621 | void *data = NULL; |
| 622 | void *page_addr; |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 623 | int using_sg = lport->sg_supp; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 624 | u32 f_ctl; |
| 625 | |
| 626 | WARN_ON(seq_blen <= 0); |
| 627 | if (unlikely(offset + seq_blen > fsp->data_len)) { |
| 628 | /* this should never happen */ |
Robert Love | 7414705 | 2009-06-10 15:31:10 -0700 | [diff] [blame] | 629 | FC_FCP_DBG(fsp, "xfer-ready past end. seq_blen %zx " |
| 630 | "offset %zx\n", seq_blen, offset); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 631 | fc_fcp_send_abort(fsp); |
| 632 | return 0; |
| 633 | } else if (offset != fsp->xfer_len) { |
| 634 | /* Out of Order Data Request - no problem, but unexpected. */ |
Robert Love | 7414705 | 2009-06-10 15:31:10 -0700 | [diff] [blame] | 635 | FC_FCP_DBG(fsp, "xfer-ready non-contiguous. " |
| 636 | "seq_blen %zx offset %zx\n", seq_blen, offset); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 637 | } |
| 638 | |
| 639 | /* |
| 640 | * if LLD is capable of seq_offload then set transport |
| 641 | * burst length (t_blen) to seq_blen, otherwise set t_blen |
| 642 | * to max FC frame payload previously set in fsp->max_payload. |
| 643 | */ |
Yi Zou | 276d681 | 2009-02-27 14:07:10 -0800 | [diff] [blame] | 644 | t_blen = fsp->max_payload; |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 645 | if (lport->seq_offload) { |
| 646 | t_blen = min(seq_blen, (size_t)lport->lso_max); |
Robert Love | 7414705 | 2009-06-10 15:31:10 -0700 | [diff] [blame] | 647 | FC_FCP_DBG(fsp, "fsp=%p:lso:blen=%zx lso_max=0x%x t_blen=%zx\n", |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 648 | fsp, seq_blen, lport->lso_max, t_blen); |
Yi Zou | 276d681 | 2009-02-27 14:07:10 -0800 | [diff] [blame] | 649 | } |
| 650 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 651 | if (t_blen > 512) |
| 652 | t_blen &= ~(512 - 1); /* round down to block size */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 653 | sc = fsp->cmd; |
| 654 | |
| 655 | remaining = seq_blen; |
| 656 | fh_parm_offset = frame_offset = offset; |
| 657 | tlen = 0; |
Hannes Reinecke | c6865b3 | 2016-10-18 10:01:51 +0200 | [diff] [blame] | 658 | seq = fc_seq_start_next(seq); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 659 | f_ctl = FC_FC_REL_OFF; |
| 660 | WARN_ON(!seq); |
| 661 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 662 | sg = scsi_sglist(sc); |
| 663 | |
| 664 | while (remaining > 0 && sg) { |
| 665 | if (offset >= sg->length) { |
| 666 | offset -= sg->length; |
| 667 | sg = sg_next(sg); |
| 668 | continue; |
| 669 | } |
| 670 | if (!fp) { |
| 671 | tlen = min(t_blen, remaining); |
| 672 | |
| 673 | /* |
| 674 | * TODO. Temporary workaround. fc_seq_send() can't |
| 675 | * handle odd lengths in non-linear skbs. |
| 676 | * This will be the final fragment only. |
| 677 | */ |
| 678 | if (tlen % 4) |
| 679 | using_sg = 0; |
Vasu Dev | a7bbc7f | 2009-11-03 11:47:55 -0800 | [diff] [blame] | 680 | fp = fc_frame_alloc(lport, using_sg ? 0 : tlen); |
| 681 | if (!fp) |
| 682 | return -ENOMEM; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 683 | |
Vasu Dev | a7bbc7f | 2009-11-03 11:47:55 -0800 | [diff] [blame] | 684 | data = fc_frame_header_get(fp) + 1; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 685 | fh_parm_offset = frame_offset; |
| 686 | fr_max_payload(fp) = fsp->max_payload; |
| 687 | } |
Chris Leech | 18fa11e | 2009-11-03 11:50:05 -0800 | [diff] [blame] | 688 | |
| 689 | off = offset + sg->offset; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 690 | sg_bytes = min(tlen, sg->length - offset); |
Chris Leech | 18fa11e | 2009-11-03 11:50:05 -0800 | [diff] [blame] | 691 | sg_bytes = min(sg_bytes, |
| 692 | (size_t) (PAGE_SIZE - (off & ~PAGE_MASK))); |
| 693 | page = sg_page(sg) + (off >> PAGE_SHIFT); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 694 | if (using_sg) { |
Chris Leech | 18fa11e | 2009-11-03 11:50:05 -0800 | [diff] [blame] | 695 | get_page(page); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 696 | skb_fill_page_desc(fp_skb(fp), |
| 697 | skb_shinfo(fp_skb(fp))->nr_frags, |
Chris Leech | 18fa11e | 2009-11-03 11:50:05 -0800 | [diff] [blame] | 698 | page, off & ~PAGE_MASK, sg_bytes); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 699 | fp_skb(fp)->data_len += sg_bytes; |
| 700 | fr_len(fp) += sg_bytes; |
| 701 | fp_skb(fp)->truesize += PAGE_SIZE; |
| 702 | } else { |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 703 | /* |
| 704 | * The scatterlist item may be bigger than PAGE_SIZE, |
| 705 | * but we must not cross pages inside the kmap. |
| 706 | */ |
Cong Wang | 77dfce0 | 2011-11-25 23:14:23 +0800 | [diff] [blame] | 707 | page_addr = kmap_atomic(page); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 708 | memcpy(data, (char *)page_addr + (off & ~PAGE_MASK), |
| 709 | sg_bytes); |
Cong Wang | 77dfce0 | 2011-11-25 23:14:23 +0800 | [diff] [blame] | 710 | kunmap_atomic(page_addr); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 711 | data += sg_bytes; |
| 712 | } |
| 713 | offset += sg_bytes; |
| 714 | frame_offset += sg_bytes; |
| 715 | tlen -= sg_bytes; |
| 716 | remaining -= sg_bytes; |
| 717 | |
Yi Zou | d37322a | 2009-10-21 16:27:58 -0700 | [diff] [blame] | 718 | if ((skb_shinfo(fp_skb(fp))->nr_frags < FC_FRAME_SG_LEN) && |
| 719 | (tlen)) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 720 | continue; |
| 721 | |
| 722 | /* |
| 723 | * Send sequence with transfer sequence initiative in case |
| 724 | * this is last FCP frame of the sequence. |
| 725 | */ |
| 726 | if (remaining == 0) |
| 727 | f_ctl |= FC_FC_SEQ_INIT | FC_FC_END_SEQ; |
| 728 | |
| 729 | ep = fc_seq_exch(seq); |
| 730 | fc_fill_fc_hdr(fp, FC_RCTL_DD_SOL_DATA, ep->did, ep->sid, |
| 731 | FC_TYPE_FCP, f_ctl, fh_parm_offset); |
| 732 | |
| 733 | /* |
| 734 | * send fragment using for a sequence. |
| 735 | */ |
Hannes Reinecke | 0cac937 | 2016-10-18 10:01:48 +0200 | [diff] [blame] | 736 | error = fc_seq_send(lport, seq, fp); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 737 | if (error) { |
| 738 | WARN_ON(1); /* send error should be rare */ |
Yi Zou | 8467b96 | 2011-05-16 16:45:57 -0700 | [diff] [blame] | 739 | return error; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 740 | } |
| 741 | fp = NULL; |
| 742 | } |
| 743 | fsp->xfer_len += seq_blen; /* premature count? */ |
| 744 | return 0; |
| 745 | } |
| 746 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 747 | /** |
Hillf Danton | 547fb12 | 2011-07-27 15:10:44 -0700 | [diff] [blame] | 748 | * fc_fcp_abts_resp() - Receive an ABTS response |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 749 | * @fsp: The FCP packet that is being aborted |
| 750 | * @fp: The response frame |
| 751 | */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 752 | static void fc_fcp_abts_resp(struct fc_fcp_pkt *fsp, struct fc_frame *fp) |
| 753 | { |
| 754 | int ba_done = 1; |
| 755 | struct fc_ba_rjt *brp; |
| 756 | struct fc_frame_header *fh; |
| 757 | |
| 758 | fh = fc_frame_header_get(fp); |
| 759 | switch (fh->fh_r_ctl) { |
| 760 | case FC_RCTL_BA_ACC: |
| 761 | break; |
| 762 | case FC_RCTL_BA_RJT: |
| 763 | brp = fc_frame_payload_get(fp, sizeof(*brp)); |
| 764 | if (brp && brp->br_reason == FC_BA_RJT_LOG_ERR) |
| 765 | break; |
| 766 | /* fall thru */ |
| 767 | default: |
| 768 | /* |
| 769 | * we will let the command timeout |
| 770 | * and scsi-ml recover in this case, |
| 771 | * therefore cleared the ba_done flag. |
| 772 | */ |
| 773 | ba_done = 0; |
| 774 | } |
| 775 | |
Hannes Reinecke | d11b44e | 2016-10-13 15:10:51 +0200 | [diff] [blame] | 776 | if (ba_done) |
| 777 | fc_fcp_abort_done(fsp); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 778 | } |
| 779 | |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 780 | /** |
Hillf Danton | 547fb12 | 2011-07-27 15:10:44 -0700 | [diff] [blame] | 781 | * fc_fcp_recv() - Receive an FCP frame |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 782 | * @seq: The sequence the frame is on |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 783 | * @fp: The received frame |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 784 | * @arg: The related FCP packet |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 785 | * |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 786 | * Context: Called from Soft IRQ context. Can not be called |
| 787 | * holding the FCP packet list lock. |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 788 | */ |
| 789 | static void fc_fcp_recv(struct fc_seq *seq, struct fc_frame *fp, void *arg) |
| 790 | { |
| 791 | struct fc_fcp_pkt *fsp = (struct fc_fcp_pkt *)arg; |
Robert Love | a29e764 | 2009-04-21 16:27:41 -0700 | [diff] [blame] | 792 | struct fc_lport *lport = fsp->lp; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 793 | struct fc_frame_header *fh; |
| 794 | struct fcp_txrdy *dd; |
| 795 | u8 r_ctl; |
| 796 | int rc = 0; |
| 797 | |
Vasu Dev | c46be11 | 2009-11-03 11:48:00 -0800 | [diff] [blame] | 798 | if (IS_ERR(fp)) { |
| 799 | fc_fcp_error(fsp, fp); |
| 800 | return; |
| 801 | } |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 802 | |
| 803 | fh = fc_frame_header_get(fp); |
| 804 | r_ctl = fh->fh_r_ctl; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 805 | |
Hannes Reinecke | 57d3ec7e | 2016-10-13 15:10:37 +0200 | [diff] [blame] | 806 | if (lport->state != LPORT_ST_READY) { |
| 807 | FC_FCP_DBG(fsp, "lport state %d, ignoring r_ctl %x\n", |
| 808 | lport->state, r_ctl); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 809 | goto out; |
Hannes Reinecke | 57d3ec7e | 2016-10-13 15:10:37 +0200 | [diff] [blame] | 810 | } |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 811 | if (fc_fcp_lock_pkt(fsp)) |
| 812 | goto out; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 813 | |
| 814 | if (fh->fh_type == FC_TYPE_BLS) { |
| 815 | fc_fcp_abts_resp(fsp, fp); |
| 816 | goto unlock; |
| 817 | } |
| 818 | |
Hannes Reinecke | 57d3ec7e | 2016-10-13 15:10:37 +0200 | [diff] [blame] | 819 | if (fsp->state & (FC_SRB_ABORTED | FC_SRB_ABORT_PENDING)) { |
| 820 | FC_FCP_DBG(fsp, "command aborted, ignoring r_ctl %x\n", r_ctl); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 821 | goto unlock; |
Hannes Reinecke | 57d3ec7e | 2016-10-13 15:10:37 +0200 | [diff] [blame] | 822 | } |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 823 | |
| 824 | if (r_ctl == FC_RCTL_DD_DATA_DESC) { |
| 825 | /* |
| 826 | * received XFER RDY from the target |
| 827 | * need to send data to the target |
| 828 | */ |
| 829 | WARN_ON(fr_flags(fp) & FCPHF_CRC_UNCHECKED); |
| 830 | dd = fc_frame_payload_get(fp, sizeof(*dd)); |
| 831 | WARN_ON(!dd); |
| 832 | |
| 833 | rc = fc_fcp_send_data(fsp, seq, |
| 834 | (size_t) ntohl(dd->ft_data_ro), |
| 835 | (size_t) ntohl(dd->ft_burst_len)); |
| 836 | if (!rc) |
| 837 | seq->rec_data = fsp->xfer_len; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 838 | } else if (r_ctl == FC_RCTL_DD_SOL_DATA) { |
| 839 | /* |
| 840 | * received a DATA frame |
| 841 | * next we will copy the data to the system buffer |
| 842 | */ |
| 843 | WARN_ON(fr_len(fp) < sizeof(*fh)); /* len may be 0 */ |
| 844 | fc_fcp_recv_data(fsp, fp); |
| 845 | seq->rec_data = fsp->xfer_contig_end; |
| 846 | } else if (r_ctl == FC_RCTL_DD_CMD_STATUS) { |
| 847 | WARN_ON(fr_flags(fp) & FCPHF_CRC_UNCHECKED); |
| 848 | |
| 849 | fc_fcp_resp(fsp, fp); |
| 850 | } else { |
Robert Love | 7414705 | 2009-06-10 15:31:10 -0700 | [diff] [blame] | 851 | FC_FCP_DBG(fsp, "unexpected frame. r_ctl %x\n", r_ctl); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 852 | } |
| 853 | unlock: |
| 854 | fc_fcp_unlock_pkt(fsp); |
| 855 | out: |
| 856 | fc_frame_free(fp); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 857 | } |
| 858 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 859 | /** |
| 860 | * fc_fcp_resp() - Handler for FCP responses |
| 861 | * @fsp: The FCP packet the response is for |
| 862 | * @fp: The response frame |
| 863 | */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 864 | static void fc_fcp_resp(struct fc_fcp_pkt *fsp, struct fc_frame *fp) |
| 865 | { |
| 866 | struct fc_frame_header *fh; |
| 867 | struct fcp_resp *fc_rp; |
| 868 | struct fcp_resp_ext *rp_ex; |
| 869 | struct fcp_resp_rsp_info *fc_rp_info; |
| 870 | u32 plen; |
| 871 | u32 expected_len; |
| 872 | u32 respl = 0; |
| 873 | u32 snsl = 0; |
| 874 | u8 flags = 0; |
| 875 | |
| 876 | plen = fr_len(fp); |
| 877 | fh = (struct fc_frame_header *)fr_hdr(fp); |
| 878 | if (unlikely(plen < sizeof(*fh) + sizeof(*fc_rp))) |
| 879 | goto len_err; |
| 880 | plen -= sizeof(*fh); |
| 881 | fc_rp = (struct fcp_resp *)(fh + 1); |
| 882 | fsp->cdb_status = fc_rp->fr_status; |
| 883 | flags = fc_rp->fr_flags; |
| 884 | fsp->scsi_comp_flags = flags; |
| 885 | expected_len = fsp->data_len; |
| 886 | |
Yi Zou | b277d2a | 2009-02-27 14:07:21 -0800 | [diff] [blame] | 887 | /* if ddp, update xfer len */ |
| 888 | fc_fcp_ddp_done(fsp); |
| 889 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 890 | if (unlikely((flags & ~FCP_CONF_REQ) || fc_rp->fr_status)) { |
| 891 | rp_ex = (void *)(fc_rp + 1); |
| 892 | if (flags & (FCP_RSP_LEN_VAL | FCP_SNS_LEN_VAL)) { |
| 893 | if (plen < sizeof(*fc_rp) + sizeof(*rp_ex)) |
| 894 | goto len_err; |
| 895 | fc_rp_info = (struct fcp_resp_rsp_info *)(rp_ex + 1); |
| 896 | if (flags & FCP_RSP_LEN_VAL) { |
| 897 | respl = ntohl(rp_ex->fr_rsp_len); |
Yi Zou | 3b64b18 | 2012-09-24 11:52:50 -0700 | [diff] [blame] | 898 | if ((respl != FCP_RESP_RSP_INFO_LEN4) && |
| 899 | (respl != FCP_RESP_RSP_INFO_LEN8)) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 900 | goto len_err; |
| 901 | if (fsp->wait_for_comp) { |
| 902 | /* Abuse cdb_status for rsp code */ |
| 903 | fsp->cdb_status = fc_rp_info->rsp_code; |
| 904 | complete(&fsp->tm_done); |
| 905 | /* |
| 906 | * tmfs will not have any scsi cmd so |
| 907 | * exit here |
| 908 | */ |
| 909 | return; |
Yi Zou | 63ac4bb | 2010-04-09 14:23:05 -0700 | [diff] [blame] | 910 | } |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 911 | } |
| 912 | if (flags & FCP_SNS_LEN_VAL) { |
| 913 | snsl = ntohl(rp_ex->fr_sns_len); |
| 914 | if (snsl > SCSI_SENSE_BUFFERSIZE) |
| 915 | snsl = SCSI_SENSE_BUFFERSIZE; |
| 916 | memcpy(fsp->cmd->sense_buffer, |
| 917 | (char *)fc_rp_info + respl, snsl); |
| 918 | } |
| 919 | } |
| 920 | if (flags & (FCP_RESID_UNDER | FCP_RESID_OVER)) { |
| 921 | if (plen < sizeof(*fc_rp) + sizeof(rp_ex->fr_resid)) |
| 922 | goto len_err; |
| 923 | if (flags & FCP_RESID_UNDER) { |
| 924 | fsp->scsi_resid = ntohl(rp_ex->fr_resid); |
| 925 | /* |
| 926 | * The cmnd->underflow is the minimum number of |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 927 | * bytes that must be transferred for this |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 928 | * command. Provided a sense condition is not |
| 929 | * present, make sure the actual amount |
| 930 | * transferred is at least the underflow value |
| 931 | * or fail. |
| 932 | */ |
| 933 | if (!(flags & FCP_SNS_LEN_VAL) && |
| 934 | (fc_rp->fr_status == 0) && |
| 935 | (scsi_bufflen(fsp->cmd) - |
| 936 | fsp->scsi_resid) < fsp->cmd->underflow) |
| 937 | goto err; |
| 938 | expected_len -= fsp->scsi_resid; |
| 939 | } else { |
| 940 | fsp->status_code = FC_ERROR; |
| 941 | } |
| 942 | } |
| 943 | } |
| 944 | fsp->state |= FC_SRB_RCV_STATUS; |
| 945 | |
| 946 | /* |
| 947 | * Check for missing or extra data frames. |
| 948 | */ |
Bart Van Assche | 9de9901 | 2013-08-14 15:40:49 +0000 | [diff] [blame] | 949 | if (unlikely(fsp->cdb_status == SAM_STAT_GOOD && |
| 950 | fsp->xfer_len != expected_len)) { |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 951 | if (fsp->xfer_len < expected_len) { |
| 952 | /* |
| 953 | * Some data may be queued locally, |
| 954 | * Wait a at least one jiffy to see if it is delivered. |
| 955 | * If this expires without data, we may do SRR. |
| 956 | */ |
Hannes Reinecke | ad3120c | 2016-10-13 15:10:53 +0200 | [diff] [blame] | 957 | if (fsp->lp->qfull) { |
| 958 | FC_FCP_DBG(fsp, "tgt %6.6x queue busy retry\n", |
| 959 | fsp->rport->port_id); |
| 960 | return; |
| 961 | } |
Hannes Reinecke | 57d3ec7e | 2016-10-13 15:10:37 +0200 | [diff] [blame] | 962 | FC_FCP_DBG(fsp, "tgt %6.6x xfer len %zx data underrun " |
| 963 | "len %x, data len %x\n", |
| 964 | fsp->rport->port_id, |
| 965 | fsp->xfer_len, expected_len, fsp->data_len); |
Hannes Reinecke | 87da3b8 | 2016-10-13 15:10:54 +0200 | [diff] [blame] | 966 | fc_fcp_timer_set(fsp, get_fsp_rec_tov(fsp)); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 967 | return; |
| 968 | } |
| 969 | fsp->status_code = FC_DATA_OVRRUN; |
Chris Leech | ce8b5df | 2010-04-09 14:23:10 -0700 | [diff] [blame] | 970 | FC_FCP_DBG(fsp, "tgt %6.6x xfer len %zx greater than expected, " |
Robert Love | 7414705 | 2009-06-10 15:31:10 -0700 | [diff] [blame] | 971 | "len %x, data len %x\n", |
| 972 | fsp->rport->port_id, |
| 973 | fsp->xfer_len, expected_len, fsp->data_len); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 974 | } |
| 975 | fc_fcp_complete_locked(fsp); |
| 976 | return; |
| 977 | |
| 978 | len_err: |
Robert Love | 7414705 | 2009-06-10 15:31:10 -0700 | [diff] [blame] | 979 | FC_FCP_DBG(fsp, "short FCP response. flags 0x%x len %u respl %u " |
| 980 | "snsl %u\n", flags, fr_len(fp), respl, snsl); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 981 | err: |
| 982 | fsp->status_code = FC_ERROR; |
| 983 | fc_fcp_complete_locked(fsp); |
| 984 | } |
| 985 | |
| 986 | /** |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 987 | * fc_fcp_complete_locked() - Complete processing of a fcp_pkt with the |
| 988 | * fcp_pkt lock held |
| 989 | * @fsp: The FCP packet to be completed |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 990 | * |
| 991 | * This function may sleep if a timer is pending. The packet lock must be |
| 992 | * held, and the host lock must not be held. |
| 993 | */ |
| 994 | static void fc_fcp_complete_locked(struct fc_fcp_pkt *fsp) |
| 995 | { |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 996 | struct fc_lport *lport = fsp->lp; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 997 | struct fc_seq *seq; |
| 998 | struct fc_exch *ep; |
| 999 | u32 f_ctl; |
| 1000 | |
| 1001 | if (fsp->state & FC_SRB_ABORT_PENDING) |
| 1002 | return; |
| 1003 | |
| 1004 | if (fsp->state & FC_SRB_ABORTED) { |
| 1005 | if (!fsp->status_code) |
| 1006 | fsp->status_code = FC_CMD_ABORTED; |
| 1007 | } else { |
| 1008 | /* |
| 1009 | * Test for transport underrun, independent of response |
| 1010 | * underrun status. |
| 1011 | */ |
Bart Van Assche | 9de9901 | 2013-08-14 15:40:49 +0000 | [diff] [blame] | 1012 | if (fsp->cdb_status == SAM_STAT_GOOD && |
| 1013 | fsp->xfer_len < fsp->data_len && !fsp->io_status && |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1014 | (!(fsp->scsi_comp_flags & FCP_RESID_UNDER) || |
Hannes Reinecke | 57d3ec7e | 2016-10-13 15:10:37 +0200 | [diff] [blame] | 1015 | fsp->xfer_len < fsp->data_len - fsp->scsi_resid)) { |
| 1016 | FC_FCP_DBG(fsp, "data underrun, xfer %zx data %x\n", |
| 1017 | fsp->xfer_len, fsp->data_len); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1018 | fsp->status_code = FC_DATA_UNDRUN; |
Hannes Reinecke | 57d3ec7e | 2016-10-13 15:10:37 +0200 | [diff] [blame] | 1019 | } |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1020 | } |
| 1021 | |
| 1022 | seq = fsp->seq_ptr; |
| 1023 | if (seq) { |
| 1024 | fsp->seq_ptr = NULL; |
| 1025 | if (unlikely(fsp->scsi_comp_flags & FCP_CONF_REQ)) { |
| 1026 | struct fc_frame *conf_frame; |
| 1027 | struct fc_seq *csp; |
| 1028 | |
Hannes Reinecke | c6865b3 | 2016-10-18 10:01:51 +0200 | [diff] [blame] | 1029 | csp = fc_seq_start_next(seq); |
Vasu Dev | c46be11 | 2009-11-03 11:48:00 -0800 | [diff] [blame] | 1030 | conf_frame = fc_fcp_frame_alloc(fsp->lp, 0); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1031 | if (conf_frame) { |
| 1032 | f_ctl = FC_FC_SEQ_INIT; |
| 1033 | f_ctl |= FC_FC_LAST_SEQ | FC_FC_END_SEQ; |
| 1034 | ep = fc_seq_exch(seq); |
| 1035 | fc_fill_fc_hdr(conf_frame, FC_RCTL_DD_SOL_CTL, |
| 1036 | ep->did, ep->sid, |
| 1037 | FC_TYPE_FCP, f_ctl, 0); |
Hannes Reinecke | 0cac937 | 2016-10-18 10:01:48 +0200 | [diff] [blame] | 1038 | fc_seq_send(lport, csp, conf_frame); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1039 | } |
| 1040 | } |
Hannes Reinecke | 768c72c | 2016-10-18 10:01:50 +0200 | [diff] [blame] | 1041 | fc_exch_done(seq); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1042 | } |
Yi Zou | d889b30 | 2010-11-30 16:19:20 -0800 | [diff] [blame] | 1043 | /* |
| 1044 | * Some resets driven by SCSI are not I/Os and do not have |
| 1045 | * SCSI commands associated with the requests. We should not |
| 1046 | * call I/O completion if we do not have a SCSI command. |
| 1047 | */ |
| 1048 | if (fsp->cmd) |
| 1049 | fc_io_compl(fsp); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1050 | } |
| 1051 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1052 | /** |
| 1053 | * fc_fcp_cleanup_cmd() - Cancel the active exchange on a fcp_pkt |
| 1054 | * @fsp: The FCP packet whose exchanges should be canceled |
| 1055 | * @error: The reason for the cancellation |
| 1056 | */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1057 | static void fc_fcp_cleanup_cmd(struct fc_fcp_pkt *fsp, int error) |
| 1058 | { |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1059 | if (fsp->seq_ptr) { |
Hannes Reinecke | 768c72c | 2016-10-18 10:01:50 +0200 | [diff] [blame] | 1060 | fc_exch_done(fsp->seq_ptr); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1061 | fsp->seq_ptr = NULL; |
| 1062 | } |
| 1063 | fsp->status_code = error; |
| 1064 | } |
| 1065 | |
| 1066 | /** |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1067 | * fc_fcp_cleanup_each_cmd() - Cancel all exchanges on a local port |
| 1068 | * @lport: The local port whose exchanges should be canceled |
| 1069 | * @id: The target's ID |
| 1070 | * @lun: The LUN |
| 1071 | * @error: The reason for cancellation |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1072 | * |
| 1073 | * If lun or id is -1, they are ignored. |
| 1074 | */ |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1075 | static void fc_fcp_cleanup_each_cmd(struct fc_lport *lport, unsigned int id, |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1076 | unsigned int lun, int error) |
| 1077 | { |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1078 | struct fc_fcp_internal *si = fc_get_scsi_internal(lport); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1079 | struct fc_fcp_pkt *fsp; |
| 1080 | struct scsi_cmnd *sc_cmd; |
| 1081 | unsigned long flags; |
| 1082 | |
Chris Leech | c1ecb90 | 2009-12-10 09:59:26 -0800 | [diff] [blame] | 1083 | spin_lock_irqsave(&si->scsi_queue_lock, flags); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1084 | restart: |
| 1085 | list_for_each_entry(fsp, &si->scsi_pkt_queue, list) { |
| 1086 | sc_cmd = fsp->cmd; |
| 1087 | if (id != -1 && scmd_id(sc_cmd) != id) |
| 1088 | continue; |
| 1089 | |
| 1090 | if (lun != -1 && sc_cmd->device->lun != lun) |
| 1091 | continue; |
| 1092 | |
| 1093 | fc_fcp_pkt_hold(fsp); |
Chris Leech | c1ecb90 | 2009-12-10 09:59:26 -0800 | [diff] [blame] | 1094 | spin_unlock_irqrestore(&si->scsi_queue_lock, flags); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1095 | |
Bart Van Assche | 8f2777f | 2015-06-05 14:20:51 -0700 | [diff] [blame] | 1096 | spin_lock_bh(&fsp->scsi_pkt_lock); |
| 1097 | if (!(fsp->state & FC_SRB_COMPL)) { |
| 1098 | fsp->state |= FC_SRB_COMPL; |
| 1099 | /* |
| 1100 | * TODO: dropping scsi_pkt_lock and then reacquiring |
| 1101 | * again around fc_fcp_cleanup_cmd() is required, |
| 1102 | * since fc_fcp_cleanup_cmd() calls into |
| 1103 | * fc_seq_set_resp() and that func preempts cpu using |
| 1104 | * schedule. May be schedule and related code should be |
| 1105 | * removed instead of unlocking here to avoid scheduling |
| 1106 | * while atomic bug. |
| 1107 | */ |
| 1108 | spin_unlock_bh(&fsp->scsi_pkt_lock); |
| 1109 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1110 | fc_fcp_cleanup_cmd(fsp, error); |
Bart Van Assche | 8f2777f | 2015-06-05 14:20:51 -0700 | [diff] [blame] | 1111 | |
| 1112 | spin_lock_bh(&fsp->scsi_pkt_lock); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1113 | fc_io_compl(fsp); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1114 | } |
Bart Van Assche | 8f2777f | 2015-06-05 14:20:51 -0700 | [diff] [blame] | 1115 | spin_unlock_bh(&fsp->scsi_pkt_lock); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1116 | |
| 1117 | fc_fcp_pkt_release(fsp); |
Chris Leech | c1ecb90 | 2009-12-10 09:59:26 -0800 | [diff] [blame] | 1118 | spin_lock_irqsave(&si->scsi_queue_lock, flags); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1119 | /* |
| 1120 | * while we dropped the lock multiple pkts could |
| 1121 | * have been released, so we have to start over. |
| 1122 | */ |
| 1123 | goto restart; |
| 1124 | } |
Chris Leech | c1ecb90 | 2009-12-10 09:59:26 -0800 | [diff] [blame] | 1125 | spin_unlock_irqrestore(&si->scsi_queue_lock, flags); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1126 | } |
| 1127 | |
| 1128 | /** |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1129 | * fc_fcp_abort_io() - Abort all FCP-SCSI exchanges on a local port |
| 1130 | * @lport: The local port whose exchanges are to be aborted |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1131 | */ |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1132 | static void fc_fcp_abort_io(struct fc_lport *lport) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1133 | { |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1134 | fc_fcp_cleanup_each_cmd(lport, -1, -1, FC_HRD_ERROR); |
| 1135 | } |
| 1136 | |
| 1137 | /** |
| 1138 | * fc_fcp_pkt_send() - Send a fcp_pkt |
| 1139 | * @lport: The local port to send the FCP packet on |
| 1140 | * @fsp: The FCP packet to send |
| 1141 | * |
| 1142 | * Return: Zero for success and -1 for failure |
Chris Leech | c1ecb90 | 2009-12-10 09:59:26 -0800 | [diff] [blame] | 1143 | * Locks: Called without locks held |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1144 | */ |
| 1145 | static int fc_fcp_pkt_send(struct fc_lport *lport, struct fc_fcp_pkt *fsp) |
| 1146 | { |
| 1147 | struct fc_fcp_internal *si = fc_get_scsi_internal(lport); |
Chris Leech | c1ecb90 | 2009-12-10 09:59:26 -0800 | [diff] [blame] | 1148 | unsigned long flags; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1149 | int rc; |
| 1150 | |
| 1151 | fsp->cmd->SCp.ptr = (char *)fsp; |
| 1152 | fsp->cdb_cmd.fc_dl = htonl(fsp->data_len); |
| 1153 | fsp->cdb_cmd.fc_flags = fsp->req_flags & ~FCP_CFL_LEN_MASK; |
| 1154 | |
Andy Grover | e35fa8c | 2012-01-19 13:39:11 -0800 | [diff] [blame] | 1155 | int_to_scsilun(fsp->cmd->device->lun, &fsp->cdb_cmd.fc_lun); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1156 | memcpy(fsp->cdb_cmd.fc_cdb, fsp->cmd->cmnd, fsp->cmd->cmd_len); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1157 | |
Chris Leech | c1ecb90 | 2009-12-10 09:59:26 -0800 | [diff] [blame] | 1158 | spin_lock_irqsave(&si->scsi_queue_lock, flags); |
| 1159 | list_add_tail(&fsp->list, &si->scsi_pkt_queue); |
| 1160 | spin_unlock_irqrestore(&si->scsi_queue_lock, flags); |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1161 | rc = lport->tt.fcp_cmd_send(lport, fsp, fc_fcp_recv); |
Chris Leech | c1ecb90 | 2009-12-10 09:59:26 -0800 | [diff] [blame] | 1162 | if (unlikely(rc)) { |
| 1163 | spin_lock_irqsave(&si->scsi_queue_lock, flags); |
Neerav Parikh | c9d24a7 | 2011-07-27 15:10:54 -0700 | [diff] [blame] | 1164 | fsp->cmd->SCp.ptr = NULL; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1165 | list_del(&fsp->list); |
Chris Leech | c1ecb90 | 2009-12-10 09:59:26 -0800 | [diff] [blame] | 1166 | spin_unlock_irqrestore(&si->scsi_queue_lock, flags); |
| 1167 | } |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1168 | |
| 1169 | return rc; |
| 1170 | } |
| 1171 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1172 | /** |
| 1173 | * fc_fcp_cmd_send() - Send a FCP command |
| 1174 | * @lport: The local port to send the command on |
| 1175 | * @fsp: The FCP packet the command is on |
| 1176 | * @resp: The handler for the response |
| 1177 | */ |
| 1178 | static int fc_fcp_cmd_send(struct fc_lport *lport, struct fc_fcp_pkt *fsp, |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1179 | void (*resp)(struct fc_seq *, |
| 1180 | struct fc_frame *fp, |
| 1181 | void *arg)) |
| 1182 | { |
| 1183 | struct fc_frame *fp; |
| 1184 | struct fc_seq *seq; |
| 1185 | struct fc_rport *rport; |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1186 | struct fc_rport_libfc_priv *rpriv; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1187 | const size_t len = sizeof(fsp->cdb_cmd); |
| 1188 | int rc = 0; |
| 1189 | |
| 1190 | if (fc_fcp_lock_pkt(fsp)) |
| 1191 | return 0; |
| 1192 | |
Vasu Dev | c46be11 | 2009-11-03 11:48:00 -0800 | [diff] [blame] | 1193 | fp = fc_fcp_frame_alloc(lport, sizeof(fsp->cdb_cmd)); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1194 | if (!fp) { |
| 1195 | rc = -1; |
| 1196 | goto unlock; |
| 1197 | } |
| 1198 | |
| 1199 | memcpy(fc_frame_payload_get(fp, len), &fsp->cdb_cmd, len); |
Yi Zou | b277d2a | 2009-02-27 14:07:21 -0800 | [diff] [blame] | 1200 | fr_fsp(fp) = fsp; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1201 | rport = fsp->rport; |
| 1202 | fsp->max_payload = rport->maxframe_size; |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1203 | rpriv = rport->dd_data; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1204 | |
| 1205 | fc_fill_fc_hdr(fp, FC_RCTL_DD_UNSOL_CMD, rport->port_id, |
Robert Love | 7b2787e | 2010-05-07 15:18:41 -0700 | [diff] [blame] | 1206 | rpriv->local_port->port_id, FC_TYPE_FCP, |
Joe Eykholt | 24f089e | 2010-07-20 15:21:01 -0700 | [diff] [blame] | 1207 | FC_FCTL_REQ, 0); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1208 | |
Hannes Reinecke | 3afd2d1 | 2016-10-18 10:01:38 +0200 | [diff] [blame] | 1209 | seq = fc_exch_seq_send(lport, fp, resp, fc_fcp_pkt_destroy, fsp, 0); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1210 | if (!seq) { |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1211 | rc = -1; |
| 1212 | goto unlock; |
| 1213 | } |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1214 | fsp->seq_ptr = seq; |
| 1215 | fc_fcp_pkt_hold(fsp); /* hold for fc_fcp_pkt_destroy */ |
| 1216 | |
Kees Cook | 841b86f | 2017-10-23 09:40:42 +0200 | [diff] [blame] | 1217 | fsp->timer.function = fc_fcp_timeout; |
john fastabend | 05fee64 | 2010-11-30 16:18:49 -0800 | [diff] [blame] | 1218 | if (rpriv->flags & FC_RP_FLAGS_REC_SUPPORTED) |
Vasu Dev | f2817ec | 2011-04-01 16:06:40 -0700 | [diff] [blame] | 1219 | fc_fcp_timer_set(fsp, get_fsp_rec_tov(fsp)); |
john fastabend | 05fee64 | 2010-11-30 16:18:49 -0800 | [diff] [blame] | 1220 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1221 | unlock: |
| 1222 | fc_fcp_unlock_pkt(fsp); |
| 1223 | return rc; |
| 1224 | } |
| 1225 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1226 | /** |
| 1227 | * fc_fcp_error() - Handler for FCP layer errors |
| 1228 | * @fsp: The FCP packet the error is on |
| 1229 | * @fp: The frame that has errored |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1230 | */ |
| 1231 | static void fc_fcp_error(struct fc_fcp_pkt *fsp, struct fc_frame *fp) |
| 1232 | { |
| 1233 | int error = PTR_ERR(fp); |
| 1234 | |
| 1235 | if (fc_fcp_lock_pkt(fsp)) |
| 1236 | return; |
| 1237 | |
Robert Love | 7414705 | 2009-06-10 15:31:10 -0700 | [diff] [blame] | 1238 | if (error == -FC_EX_CLOSED) { |
Hannes Reinecke | a0452bb | 2016-10-13 15:10:38 +0200 | [diff] [blame] | 1239 | fc_fcp_retry_cmd(fsp, FC_ERROR); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1240 | goto unlock; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1241 | } |
Robert Love | 7414705 | 2009-06-10 15:31:10 -0700 | [diff] [blame] | 1242 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1243 | /* |
| 1244 | * clear abort pending, because the lower layer |
| 1245 | * decided to force completion. |
| 1246 | */ |
| 1247 | fsp->state &= ~FC_SRB_ABORT_PENDING; |
| 1248 | fsp->status_code = FC_CMD_PLOGO; |
| 1249 | fc_fcp_complete_locked(fsp); |
| 1250 | unlock: |
| 1251 | fc_fcp_unlock_pkt(fsp); |
| 1252 | } |
| 1253 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1254 | /** |
| 1255 | * fc_fcp_pkt_abort() - Abort a fcp_pkt |
| 1256 | * @fsp: The FCP packet to abort on |
| 1257 | * |
| 1258 | * Called to send an abort and then wait for abort completion |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1259 | */ |
Robert Love | c340111 | 2009-10-21 16:27:06 -0700 | [diff] [blame] | 1260 | static int fc_fcp_pkt_abort(struct fc_fcp_pkt *fsp) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1261 | { |
| 1262 | int rc = FAILED; |
Hillf Danton | fa79dbd | 2011-01-28 16:03:21 -0800 | [diff] [blame] | 1263 | unsigned long ticks_left; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1264 | |
Hannes Reinecke | 57d3ec7e | 2016-10-13 15:10:37 +0200 | [diff] [blame] | 1265 | FC_FCP_DBG(fsp, "pkt abort state %x\n", fsp->state); |
| 1266 | if (fc_fcp_send_abort(fsp)) { |
| 1267 | FC_FCP_DBG(fsp, "failed to send abort\n"); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1268 | return FAILED; |
Hannes Reinecke | 57d3ec7e | 2016-10-13 15:10:37 +0200 | [diff] [blame] | 1269 | } |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1270 | |
Hannes Reinecke | d11b44e | 2016-10-13 15:10:51 +0200 | [diff] [blame] | 1271 | if (fsp->state & FC_SRB_ABORTED) { |
| 1272 | FC_FCP_DBG(fsp, "target abort cmd completed\n"); |
| 1273 | return SUCCESS; |
| 1274 | } |
| 1275 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1276 | init_completion(&fsp->tm_done); |
| 1277 | fsp->wait_for_comp = 1; |
| 1278 | |
| 1279 | spin_unlock_bh(&fsp->scsi_pkt_lock); |
Hillf Danton | fa79dbd | 2011-01-28 16:03:21 -0800 | [diff] [blame] | 1280 | ticks_left = wait_for_completion_timeout(&fsp->tm_done, |
| 1281 | FC_SCSI_TM_TOV); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1282 | spin_lock_bh(&fsp->scsi_pkt_lock); |
| 1283 | fsp->wait_for_comp = 0; |
| 1284 | |
Hillf Danton | fa79dbd | 2011-01-28 16:03:21 -0800 | [diff] [blame] | 1285 | if (!ticks_left) { |
Robert Love | 7414705 | 2009-06-10 15:31:10 -0700 | [diff] [blame] | 1286 | FC_FCP_DBG(fsp, "target abort cmd failed\n"); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1287 | } else if (fsp->state & FC_SRB_ABORTED) { |
Robert Love | 7414705 | 2009-06-10 15:31:10 -0700 | [diff] [blame] | 1288 | FC_FCP_DBG(fsp, "target abort cmd passed\n"); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1289 | rc = SUCCESS; |
| 1290 | fc_fcp_complete_locked(fsp); |
| 1291 | } |
| 1292 | |
| 1293 | return rc; |
| 1294 | } |
| 1295 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1296 | /** |
| 1297 | * fc_lun_reset_send() - Send LUN reset command |
| 1298 | * @data: The FCP packet that identifies the LUN to be reset |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1299 | */ |
Kees Cook | 1f0849d | 2017-10-11 12:51:53 -0700 | [diff] [blame] | 1300 | static void fc_lun_reset_send(struct timer_list *t) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1301 | { |
Kees Cook | 1f0849d | 2017-10-11 12:51:53 -0700 | [diff] [blame] | 1302 | struct fc_fcp_pkt *fsp = from_timer(fsp, t, timer); |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1303 | struct fc_lport *lport = fsp->lp; |
john fastabend | e0883a3 | 2010-11-30 16:18:44 -0800 | [diff] [blame] | 1304 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1305 | if (lport->tt.fcp_cmd_send(lport, fsp, fc_tm_done)) { |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1306 | if (fsp->recov_retry++ >= FC_MAX_RECOV_RETRY) |
| 1307 | return; |
| 1308 | if (fc_fcp_lock_pkt(fsp)) |
| 1309 | return; |
Kees Cook | 841b86f | 2017-10-23 09:40:42 +0200 | [diff] [blame] | 1310 | fsp->timer.function = fc_lun_reset_send; |
Vasu Dev | f2817ec | 2011-04-01 16:06:40 -0700 | [diff] [blame] | 1311 | fc_fcp_timer_set(fsp, get_fsp_rec_tov(fsp)); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1312 | fc_fcp_unlock_pkt(fsp); |
| 1313 | } |
| 1314 | } |
| 1315 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1316 | /** |
| 1317 | * fc_lun_reset() - Send a LUN RESET command to a device |
| 1318 | * and wait for the reply |
Uwe Kleine-König | b595076 | 2010-11-01 15:38:34 -0400 | [diff] [blame] | 1319 | * @lport: The local port to sent the command on |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1320 | * @fsp: The FCP packet that identifies the LUN to be reset |
| 1321 | * @id: The SCSI command ID |
| 1322 | * @lun: The LUN ID to be reset |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1323 | */ |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1324 | static int fc_lun_reset(struct fc_lport *lport, struct fc_fcp_pkt *fsp, |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1325 | unsigned int id, unsigned int lun) |
| 1326 | { |
| 1327 | int rc; |
| 1328 | |
| 1329 | fsp->cdb_cmd.fc_dl = htonl(fsp->data_len); |
| 1330 | fsp->cdb_cmd.fc_tm_flags = FCP_TMF_LUN_RESET; |
Andy Grover | e35fa8c | 2012-01-19 13:39:11 -0800 | [diff] [blame] | 1331 | int_to_scsilun(lun, &fsp->cdb_cmd.fc_lun); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1332 | |
| 1333 | fsp->wait_for_comp = 1; |
| 1334 | init_completion(&fsp->tm_done); |
| 1335 | |
Kees Cook | 1f0849d | 2017-10-11 12:51:53 -0700 | [diff] [blame] | 1336 | fc_lun_reset_send(&fsp->timer); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1337 | |
| 1338 | /* |
| 1339 | * wait for completion of reset |
| 1340 | * after that make sure all commands are terminated |
| 1341 | */ |
| 1342 | rc = wait_for_completion_timeout(&fsp->tm_done, FC_SCSI_TM_TOV); |
| 1343 | |
| 1344 | spin_lock_bh(&fsp->scsi_pkt_lock); |
| 1345 | fsp->state |= FC_SRB_COMPL; |
| 1346 | spin_unlock_bh(&fsp->scsi_pkt_lock); |
| 1347 | |
| 1348 | del_timer_sync(&fsp->timer); |
| 1349 | |
| 1350 | spin_lock_bh(&fsp->scsi_pkt_lock); |
| 1351 | if (fsp->seq_ptr) { |
Hannes Reinecke | 768c72c | 2016-10-18 10:01:50 +0200 | [diff] [blame] | 1352 | fc_exch_done(fsp->seq_ptr); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1353 | fsp->seq_ptr = NULL; |
| 1354 | } |
| 1355 | fsp->wait_for_comp = 0; |
| 1356 | spin_unlock_bh(&fsp->scsi_pkt_lock); |
| 1357 | |
| 1358 | if (!rc) { |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1359 | FC_SCSI_DBG(lport, "lun reset failed\n"); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1360 | return FAILED; |
| 1361 | } |
| 1362 | |
| 1363 | /* cdb_status holds the tmf's rsp code */ |
| 1364 | if (fsp->cdb_status != FCP_TMF_CMPL) |
| 1365 | return FAILED; |
| 1366 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1367 | FC_SCSI_DBG(lport, "lun reset to lun %u completed\n", lun); |
| 1368 | fc_fcp_cleanup_each_cmd(lport, id, lun, FC_CMD_ABORTED); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1369 | return SUCCESS; |
| 1370 | } |
| 1371 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1372 | /** |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 1373 | * fc_tm_done() - Task Management response handler |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1374 | * @seq: The sequence that the response is on |
| 1375 | * @fp: The response frame |
| 1376 | * @arg: The FCP packet the response is for |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1377 | */ |
| 1378 | static void fc_tm_done(struct fc_seq *seq, struct fc_frame *fp, void *arg) |
| 1379 | { |
| 1380 | struct fc_fcp_pkt *fsp = arg; |
| 1381 | struct fc_frame_header *fh; |
| 1382 | |
| 1383 | if (IS_ERR(fp)) { |
| 1384 | /* |
| 1385 | * If there is an error just let it timeout or wait |
| 1386 | * for TMF to be aborted if it timedout. |
| 1387 | * |
| 1388 | * scsi-eh will escalate for when either happens. |
| 1389 | */ |
Dan Carpenter | e4a9a98 | 2011-01-28 16:03:31 -0800 | [diff] [blame] | 1390 | return; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1391 | } |
| 1392 | |
| 1393 | if (fc_fcp_lock_pkt(fsp)) |
Yi Zou | b5fe5e9 | 2010-11-30 16:19:35 -0800 | [diff] [blame] | 1394 | goto out; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1395 | |
| 1396 | /* |
| 1397 | * raced with eh timeout handler. |
| 1398 | */ |
Yi Zou | b5fe5e9 | 2010-11-30 16:19:35 -0800 | [diff] [blame] | 1399 | if (!fsp->seq_ptr || !fsp->wait_for_comp) |
| 1400 | goto out_unlock; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1401 | |
| 1402 | fh = fc_frame_header_get(fp); |
| 1403 | if (fh->fh_type != FC_TYPE_BLS) |
| 1404 | fc_fcp_resp(fsp, fp); |
| 1405 | fsp->seq_ptr = NULL; |
Hannes Reinecke | 768c72c | 2016-10-18 10:01:50 +0200 | [diff] [blame] | 1406 | fc_exch_done(seq); |
Yi Zou | b5fe5e9 | 2010-11-30 16:19:35 -0800 | [diff] [blame] | 1407 | out_unlock: |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1408 | fc_fcp_unlock_pkt(fsp); |
Yi Zou | b5fe5e9 | 2010-11-30 16:19:35 -0800 | [diff] [blame] | 1409 | out: |
| 1410 | fc_frame_free(fp); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1411 | } |
| 1412 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1413 | /** |
| 1414 | * fc_fcp_cleanup() - Cleanup all FCP exchanges on a local port |
| 1415 | * @lport: The local port to be cleaned up |
| 1416 | */ |
| 1417 | static void fc_fcp_cleanup(struct fc_lport *lport) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1418 | { |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1419 | fc_fcp_cleanup_each_cmd(lport, -1, -1, FC_ERROR); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1420 | } |
| 1421 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1422 | /** |
| 1423 | * fc_fcp_timeout() - Handler for fcp_pkt timeouts |
| 1424 | * @data: The FCP packet that has timed out |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1425 | * |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1426 | * If REC is supported then just issue it and return. The REC exchange will |
| 1427 | * complete or time out and recovery can continue at that point. Otherwise, |
| 1428 | * if the response has been received without all the data it has been |
| 1429 | * ER_TIMEOUT since the response was received. If the response has not been |
| 1430 | * received we see if data was received recently. If it has been then we |
| 1431 | * continue waiting, otherwise, we abort the command. |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1432 | */ |
Kees Cook | 1f0849d | 2017-10-11 12:51:53 -0700 | [diff] [blame] | 1433 | static void fc_fcp_timeout(struct timer_list *t) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1434 | { |
Kees Cook | 1f0849d | 2017-10-11 12:51:53 -0700 | [diff] [blame] | 1435 | struct fc_fcp_pkt *fsp = from_timer(fsp, t, timer); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1436 | struct fc_rport *rport = fsp->rport; |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1437 | struct fc_rport_libfc_priv *rpriv = rport->dd_data; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1438 | |
| 1439 | if (fc_fcp_lock_pkt(fsp)) |
| 1440 | return; |
| 1441 | |
| 1442 | if (fsp->cdb_cmd.fc_tm_flags) |
| 1443 | goto unlock; |
| 1444 | |
Hannes Reinecke | ad3120c | 2016-10-13 15:10:53 +0200 | [diff] [blame] | 1445 | if (fsp->lp->qfull) { |
| 1446 | FC_FCP_DBG(fsp, "fcp timeout, resetting timer delay %d\n", |
| 1447 | fsp->timer_delay); |
Kees Cook | 841b86f | 2017-10-23 09:40:42 +0200 | [diff] [blame] | 1448 | fsp->timer.function = fc_fcp_timeout; |
Hannes Reinecke | ad3120c | 2016-10-13 15:10:53 +0200 | [diff] [blame] | 1449 | fc_fcp_timer_set(fsp, fsp->timer_delay); |
| 1450 | goto unlock; |
| 1451 | } |
| 1452 | FC_FCP_DBG(fsp, "fcp timeout, delay %d flags %x state %x\n", |
| 1453 | fsp->timer_delay, rpriv->flags, fsp->state); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1454 | fsp->state |= FC_SRB_FCP_PROCESSING_TMO; |
| 1455 | |
Vasu Dev | 5b97fab | 2012-10-09 01:43:24 +0000 | [diff] [blame] | 1456 | if (rpriv->flags & FC_RP_FLAGS_REC_SUPPORTED) |
Yi Zou | a752359 | 2012-07-06 10:40:31 -0700 | [diff] [blame] | 1457 | fc_fcp_rec(fsp); |
Vasu Dev | 5b97fab | 2012-10-09 01:43:24 +0000 | [diff] [blame] | 1458 | else if (fsp->state & FC_SRB_RCV_STATUS) |
| 1459 | fc_fcp_complete_locked(fsp); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1460 | else |
john fastabend | ac17ea8 | 2010-11-30 16:18:39 -0800 | [diff] [blame] | 1461 | fc_fcp_recovery(fsp, FC_TIMED_OUT); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1462 | fsp->state &= ~FC_SRB_FCP_PROCESSING_TMO; |
| 1463 | unlock: |
| 1464 | fc_fcp_unlock_pkt(fsp); |
| 1465 | } |
| 1466 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1467 | /** |
| 1468 | * fc_fcp_rec() - Send a REC ELS request |
| 1469 | * @fsp: The FCP packet to send the REC request on |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1470 | */ |
| 1471 | static void fc_fcp_rec(struct fc_fcp_pkt *fsp) |
| 1472 | { |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1473 | struct fc_lport *lport; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1474 | struct fc_frame *fp; |
| 1475 | struct fc_rport *rport; |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1476 | struct fc_rport_libfc_priv *rpriv; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1477 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1478 | lport = fsp->lp; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1479 | rport = fsp->rport; |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1480 | rpriv = rport->dd_data; |
| 1481 | if (!fsp->seq_ptr || rpriv->rp_state != RPORT_ST_READY) { |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1482 | fsp->status_code = FC_HRD_ERROR; |
Martin K. Petersen | 1c9fbaf | 2009-01-04 03:14:11 -0500 | [diff] [blame] | 1483 | fsp->io_status = 0; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1484 | fc_fcp_complete_locked(fsp); |
| 1485 | return; |
| 1486 | } |
john fastabend | e0883a3 | 2010-11-30 16:18:44 -0800 | [diff] [blame] | 1487 | |
Vasu Dev | c46be11 | 2009-11-03 11:48:00 -0800 | [diff] [blame] | 1488 | fp = fc_fcp_frame_alloc(lport, sizeof(struct fc_els_rec)); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1489 | if (!fp) |
| 1490 | goto retry; |
| 1491 | |
| 1492 | fr_seq(fp) = fsp->seq_ptr; |
| 1493 | fc_fill_fc_hdr(fp, FC_RCTL_ELS_REQ, rport->port_id, |
Robert Love | 7b2787e | 2010-05-07 15:18:41 -0700 | [diff] [blame] | 1494 | rpriv->local_port->port_id, FC_TYPE_ELS, |
Joe Eykholt | 24f089e | 2010-07-20 15:21:01 -0700 | [diff] [blame] | 1495 | FC_FCTL_REQ, 0); |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1496 | if (lport->tt.elsct_send(lport, rport->port_id, fp, ELS_REC, |
| 1497 | fc_fcp_rec_resp, fsp, |
Yi Zou | 3a91090 | 2010-11-30 16:19:30 -0800 | [diff] [blame] | 1498 | 2 * lport->r_a_tov)) { |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1499 | fc_fcp_pkt_hold(fsp); /* hold while REC outstanding */ |
| 1500 | return; |
| 1501 | } |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1502 | retry: |
| 1503 | if (fsp->recov_retry++ < FC_MAX_RECOV_RETRY) |
Yi Zou | 3a91090 | 2010-11-30 16:19:30 -0800 | [diff] [blame] | 1504 | fc_fcp_timer_set(fsp, get_fsp_rec_tov(fsp)); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1505 | else |
john fastabend | ac17ea8 | 2010-11-30 16:18:39 -0800 | [diff] [blame] | 1506 | fc_fcp_recovery(fsp, FC_TIMED_OUT); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1507 | } |
| 1508 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1509 | /** |
| 1510 | * fc_fcp_rec_resp() - Handler for REC ELS responses |
| 1511 | * @seq: The sequence the response is on |
| 1512 | * @fp: The response frame |
| 1513 | * @arg: The FCP packet the response is on |
| 1514 | * |
| 1515 | * If the response is a reject then the scsi layer will handle |
| 1516 | * the timeout. If the response is a LS_ACC then if the I/O was not completed |
| 1517 | * set the timeout and return. If the I/O was completed then complete the |
| 1518 | * exchange and tell the SCSI layer. |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1519 | */ |
| 1520 | static void fc_fcp_rec_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) |
| 1521 | { |
| 1522 | struct fc_fcp_pkt *fsp = (struct fc_fcp_pkt *)arg; |
| 1523 | struct fc_els_rec_acc *recp; |
| 1524 | struct fc_els_ls_rjt *rjt; |
| 1525 | u32 e_stat; |
| 1526 | u8 opcode; |
| 1527 | u32 offset; |
| 1528 | enum dma_data_direction data_dir; |
| 1529 | enum fc_rctl r_ctl; |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1530 | struct fc_rport_libfc_priv *rpriv; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1531 | |
| 1532 | if (IS_ERR(fp)) { |
| 1533 | fc_fcp_rec_error(fsp, fp); |
| 1534 | return; |
| 1535 | } |
| 1536 | |
| 1537 | if (fc_fcp_lock_pkt(fsp)) |
| 1538 | goto out; |
| 1539 | |
| 1540 | fsp->recov_retry = 0; |
| 1541 | opcode = fc_frame_payload_op(fp); |
| 1542 | if (opcode == ELS_LS_RJT) { |
| 1543 | rjt = fc_frame_payload_get(fp, sizeof(*rjt)); |
| 1544 | switch (rjt->er_reason) { |
| 1545 | default: |
Hannes Reinecke | 57d3ec7e | 2016-10-13 15:10:37 +0200 | [diff] [blame] | 1546 | FC_FCP_DBG(fsp, |
| 1547 | "device %x invalid REC reject %d/%d\n", |
Robert Love | 7414705 | 2009-06-10 15:31:10 -0700 | [diff] [blame] | 1548 | fsp->rport->port_id, rjt->er_reason, |
| 1549 | rjt->er_explan); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1550 | /* fall through */ |
| 1551 | case ELS_RJT_UNSUP: |
Robert Love | 7414705 | 2009-06-10 15:31:10 -0700 | [diff] [blame] | 1552 | FC_FCP_DBG(fsp, "device does not support REC\n"); |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1553 | rpriv = fsp->rport->dd_data; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1554 | /* |
| 1555 | * if we do not spport RECs or got some bogus |
| 1556 | * reason then resetup timer so we check for |
| 1557 | * making progress. |
| 1558 | */ |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1559 | rpriv->flags &= ~FC_RP_FLAGS_REC_SUPPORTED; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1560 | break; |
| 1561 | case ELS_RJT_LOGIC: |
| 1562 | case ELS_RJT_UNAB: |
Hannes Reinecke | 57d3ec7e | 2016-10-13 15:10:37 +0200 | [diff] [blame] | 1563 | FC_FCP_DBG(fsp, "device %x REC reject %d/%d\n", |
| 1564 | fsp->rport->port_id, rjt->er_reason, |
| 1565 | rjt->er_explan); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1566 | /* |
Hannes Reinecke | 9ca1e18 | 2016-10-13 15:10:50 +0200 | [diff] [blame] | 1567 | * If response got lost or is stuck in the |
| 1568 | * queue somewhere we have no idea if and when |
| 1569 | * the response will be received. So quarantine |
| 1570 | * the xid and retry the command. |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1571 | */ |
Hannes Reinecke | 9ca1e18 | 2016-10-13 15:10:50 +0200 | [diff] [blame] | 1572 | if (rjt->er_explan == ELS_EXPL_OXID_RXID) { |
| 1573 | struct fc_exch *ep = fc_seq_exch(fsp->seq_ptr); |
| 1574 | ep->state |= FC_EX_QUARANTINE; |
Hannes Reinecke | a0452bb | 2016-10-13 15:10:38 +0200 | [diff] [blame] | 1575 | fsp->state |= FC_SRB_ABORTED; |
| 1576 | fc_fcp_retry_cmd(fsp, FC_TRANS_RESET); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1577 | break; |
| 1578 | } |
Hannes Reinecke | a0452bb | 2016-10-13 15:10:38 +0200 | [diff] [blame] | 1579 | fc_fcp_recovery(fsp, FC_TRANS_RESET); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1580 | break; |
| 1581 | } |
| 1582 | } else if (opcode == ELS_LS_ACC) { |
| 1583 | if (fsp->state & FC_SRB_ABORTED) |
| 1584 | goto unlock_out; |
| 1585 | |
| 1586 | data_dir = fsp->cmd->sc_data_direction; |
| 1587 | recp = fc_frame_payload_get(fp, sizeof(*recp)); |
| 1588 | offset = ntohl(recp->reca_fc4value); |
| 1589 | e_stat = ntohl(recp->reca_e_stat); |
| 1590 | |
| 1591 | if (e_stat & ESB_ST_COMPLETE) { |
| 1592 | |
| 1593 | /* |
| 1594 | * The exchange is complete. |
| 1595 | * |
| 1596 | * For output, we must've lost the response. |
| 1597 | * For input, all data must've been sent. |
| 1598 | * We lost may have lost the response |
| 1599 | * (and a confirmation was requested) and maybe |
| 1600 | * some data. |
| 1601 | * |
| 1602 | * If all data received, send SRR |
| 1603 | * asking for response. If partial data received, |
| 1604 | * or gaps, SRR requests data at start of gap. |
| 1605 | * Recovery via SRR relies on in-order-delivery. |
| 1606 | */ |
| 1607 | if (data_dir == DMA_TO_DEVICE) { |
| 1608 | r_ctl = FC_RCTL_DD_CMD_STATUS; |
| 1609 | } else if (fsp->xfer_contig_end == offset) { |
| 1610 | r_ctl = FC_RCTL_DD_CMD_STATUS; |
| 1611 | } else { |
| 1612 | offset = fsp->xfer_contig_end; |
| 1613 | r_ctl = FC_RCTL_DD_SOL_DATA; |
| 1614 | } |
| 1615 | fc_fcp_srr(fsp, r_ctl, offset); |
| 1616 | } else if (e_stat & ESB_ST_SEQ_INIT) { |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1617 | /* |
| 1618 | * The remote port has the initiative, so just |
| 1619 | * keep waiting for it to complete. |
| 1620 | */ |
Vasu Dev | f2817ec | 2011-04-01 16:06:40 -0700 | [diff] [blame] | 1621 | fc_fcp_timer_set(fsp, get_fsp_rec_tov(fsp)); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1622 | } else { |
| 1623 | |
| 1624 | /* |
| 1625 | * The exchange is incomplete, we have seq. initiative. |
| 1626 | * Lost response with requested confirmation, |
| 1627 | * lost confirmation, lost transfer ready or |
| 1628 | * lost write data. |
| 1629 | * |
| 1630 | * For output, if not all data was received, ask |
| 1631 | * for transfer ready to be repeated. |
| 1632 | * |
| 1633 | * If we received or sent all the data, send SRR to |
| 1634 | * request response. |
| 1635 | * |
| 1636 | * If we lost a response, we may have lost some read |
| 1637 | * data as well. |
| 1638 | */ |
| 1639 | r_ctl = FC_RCTL_DD_SOL_DATA; |
| 1640 | if (data_dir == DMA_TO_DEVICE) { |
| 1641 | r_ctl = FC_RCTL_DD_CMD_STATUS; |
| 1642 | if (offset < fsp->data_len) |
| 1643 | r_ctl = FC_RCTL_DD_DATA_DESC; |
| 1644 | } else if (offset == fsp->xfer_contig_end) { |
| 1645 | r_ctl = FC_RCTL_DD_CMD_STATUS; |
| 1646 | } else if (fsp->xfer_contig_end < offset) { |
| 1647 | offset = fsp->xfer_contig_end; |
| 1648 | } |
| 1649 | fc_fcp_srr(fsp, r_ctl, offset); |
| 1650 | } |
| 1651 | } |
| 1652 | unlock_out: |
| 1653 | fc_fcp_unlock_pkt(fsp); |
| 1654 | out: |
| 1655 | fc_fcp_pkt_release(fsp); /* drop hold for outstanding REC */ |
| 1656 | fc_frame_free(fp); |
| 1657 | } |
| 1658 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1659 | /** |
| 1660 | * fc_fcp_rec_error() - Handler for REC errors |
| 1661 | * @fsp: The FCP packet the error is on |
| 1662 | * @fp: The REC frame |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1663 | */ |
| 1664 | static void fc_fcp_rec_error(struct fc_fcp_pkt *fsp, struct fc_frame *fp) |
| 1665 | { |
| 1666 | int error = PTR_ERR(fp); |
| 1667 | |
| 1668 | if (fc_fcp_lock_pkt(fsp)) |
| 1669 | goto out; |
| 1670 | |
| 1671 | switch (error) { |
| 1672 | case -FC_EX_CLOSED: |
Hannes Reinecke | 57d3ec7e | 2016-10-13 15:10:37 +0200 | [diff] [blame] | 1673 | FC_FCP_DBG(fsp, "REC %p fid %6.6x exchange closed\n", |
| 1674 | fsp, fsp->rport->port_id); |
Hannes Reinecke | a0452bb | 2016-10-13 15:10:38 +0200 | [diff] [blame] | 1675 | fc_fcp_retry_cmd(fsp, FC_ERROR); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1676 | break; |
| 1677 | |
| 1678 | default: |
Chris Leech | ce8b5df | 2010-04-09 14:23:10 -0700 | [diff] [blame] | 1679 | FC_FCP_DBG(fsp, "REC %p fid %6.6x error unexpected error %d\n", |
Robert Love | 7414705 | 2009-06-10 15:31:10 -0700 | [diff] [blame] | 1680 | fsp, fsp->rport->port_id, error); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1681 | fsp->status_code = FC_CMD_PLOGO; |
| 1682 | /* fall through */ |
| 1683 | |
| 1684 | case -FC_EX_TIMEOUT: |
| 1685 | /* |
| 1686 | * Assume REC or LS_ACC was lost. |
| 1687 | * The exchange manager will have aborted REC, so retry. |
| 1688 | */ |
Hannes Reinecke | 57d3ec7e | 2016-10-13 15:10:37 +0200 | [diff] [blame] | 1689 | FC_FCP_DBG(fsp, "REC %p fid %6.6x exchange timeout retry %d/%d\n", |
| 1690 | fsp, fsp->rport->port_id, fsp->recov_retry, |
Robert Love | 7414705 | 2009-06-10 15:31:10 -0700 | [diff] [blame] | 1691 | FC_MAX_RECOV_RETRY); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1692 | if (fsp->recov_retry++ < FC_MAX_RECOV_RETRY) |
| 1693 | fc_fcp_rec(fsp); |
| 1694 | else |
john fastabend | ac17ea8 | 2010-11-30 16:18:39 -0800 | [diff] [blame] | 1695 | fc_fcp_recovery(fsp, FC_ERROR); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1696 | break; |
| 1697 | } |
| 1698 | fc_fcp_unlock_pkt(fsp); |
| 1699 | out: |
| 1700 | fc_fcp_pkt_release(fsp); /* drop hold for outstanding REC */ |
| 1701 | } |
| 1702 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1703 | /** |
Vasu Dev | 5c12c41 | 2010-03-12 16:08:44 -0800 | [diff] [blame] | 1704 | * fc_fcp_recovery() - Handler for fcp_pkt recovery |
| 1705 | * @fsp: The FCP pkt that needs to be aborted |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1706 | */ |
john fastabend | ac17ea8 | 2010-11-30 16:18:39 -0800 | [diff] [blame] | 1707 | static void fc_fcp_recovery(struct fc_fcp_pkt *fsp, u8 code) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1708 | { |
Hannes Reinecke | 57d3ec7e | 2016-10-13 15:10:37 +0200 | [diff] [blame] | 1709 | FC_FCP_DBG(fsp, "start recovery code %x\n", code); |
john fastabend | ac17ea8 | 2010-11-30 16:18:39 -0800 | [diff] [blame] | 1710 | fsp->status_code = code; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1711 | fsp->cdb_status = 0; |
| 1712 | fsp->io_status = 0; |
| 1713 | /* |
| 1714 | * if this fails then we let the scsi command timer fire and |
| 1715 | * scsi-ml escalate. |
| 1716 | */ |
| 1717 | fc_fcp_send_abort(fsp); |
| 1718 | } |
| 1719 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1720 | /** |
| 1721 | * fc_fcp_srr() - Send a SRR request (Sequence Retransmission Request) |
| 1722 | * @fsp: The FCP packet the SRR is to be sent on |
| 1723 | * @r_ctl: The R_CTL field for the SRR request |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1724 | * This is called after receiving status but insufficient data, or |
| 1725 | * when expecting status but the request has timed out. |
| 1726 | */ |
| 1727 | static void fc_fcp_srr(struct fc_fcp_pkt *fsp, enum fc_rctl r_ctl, u32 offset) |
| 1728 | { |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1729 | struct fc_lport *lport = fsp->lp; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1730 | struct fc_rport *rport; |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1731 | struct fc_rport_libfc_priv *rpriv; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1732 | struct fc_exch *ep = fc_seq_exch(fsp->seq_ptr); |
| 1733 | struct fc_seq *seq; |
| 1734 | struct fcp_srr *srr; |
| 1735 | struct fc_frame *fp; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1736 | |
| 1737 | rport = fsp->rport; |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1738 | rpriv = rport->dd_data; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1739 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1740 | if (!(rpriv->flags & FC_RP_FLAGS_RETRY) || |
| 1741 | rpriv->rp_state != RPORT_ST_READY) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1742 | goto retry; /* shouldn't happen */ |
Vasu Dev | c46be11 | 2009-11-03 11:48:00 -0800 | [diff] [blame] | 1743 | fp = fc_fcp_frame_alloc(lport, sizeof(*srr)); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1744 | if (!fp) |
| 1745 | goto retry; |
| 1746 | |
| 1747 | srr = fc_frame_payload_get(fp, sizeof(*srr)); |
| 1748 | memset(srr, 0, sizeof(*srr)); |
| 1749 | srr->srr_op = ELS_SRR; |
| 1750 | srr->srr_ox_id = htons(ep->oxid); |
| 1751 | srr->srr_rx_id = htons(ep->rxid); |
| 1752 | srr->srr_r_ctl = r_ctl; |
| 1753 | srr->srr_rel_off = htonl(offset); |
| 1754 | |
| 1755 | fc_fill_fc_hdr(fp, FC_RCTL_ELS4_REQ, rport->port_id, |
Robert Love | 7b2787e | 2010-05-07 15:18:41 -0700 | [diff] [blame] | 1756 | rpriv->local_port->port_id, FC_TYPE_FCP, |
Joe Eykholt | 24f089e | 2010-07-20 15:21:01 -0700 | [diff] [blame] | 1757 | FC_FCTL_REQ, 0); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1758 | |
Hannes Reinecke | 3afd2d1 | 2016-10-18 10:01:38 +0200 | [diff] [blame] | 1759 | seq = fc_exch_seq_send(lport, fp, fc_fcp_srr_resp, |
| 1760 | fc_fcp_pkt_destroy, |
| 1761 | fsp, get_fsp_rec_tov(fsp)); |
Chris Leech | 8f550f9 | 2009-10-21 16:28:09 -0700 | [diff] [blame] | 1762 | if (!seq) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1763 | goto retry; |
Chris Leech | 8f550f9 | 2009-10-21 16:28:09 -0700 | [diff] [blame] | 1764 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1765 | fsp->recov_seq = seq; |
| 1766 | fsp->xfer_len = offset; |
| 1767 | fsp->xfer_contig_end = offset; |
| 1768 | fsp->state &= ~FC_SRB_RCV_STATUS; |
| 1769 | fc_fcp_pkt_hold(fsp); /* hold for outstanding SRR */ |
| 1770 | return; |
| 1771 | retry: |
Hannes Reinecke | a0452bb | 2016-10-13 15:10:38 +0200 | [diff] [blame] | 1772 | fc_fcp_retry_cmd(fsp, FC_TRANS_RESET); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1773 | } |
| 1774 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1775 | /** |
| 1776 | * fc_fcp_srr_resp() - Handler for SRR response |
| 1777 | * @seq: The sequence the SRR is on |
| 1778 | * @fp: The SRR frame |
| 1779 | * @arg: The FCP packet the SRR is on |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1780 | */ |
| 1781 | static void fc_fcp_srr_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) |
| 1782 | { |
| 1783 | struct fc_fcp_pkt *fsp = arg; |
| 1784 | struct fc_frame_header *fh; |
| 1785 | |
| 1786 | if (IS_ERR(fp)) { |
| 1787 | fc_fcp_srr_error(fsp, fp); |
| 1788 | return; |
| 1789 | } |
| 1790 | |
| 1791 | if (fc_fcp_lock_pkt(fsp)) |
| 1792 | goto out; |
| 1793 | |
| 1794 | fh = fc_frame_header_get(fp); |
| 1795 | /* |
Hannes Reinecke | 768c72c | 2016-10-18 10:01:50 +0200 | [diff] [blame] | 1796 | * BUG? fc_fcp_srr_error calls fc_exch_done which would release |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1797 | * the ep. But if fc_fcp_srr_error had got -FC_EX_TIMEOUT, |
Hannes Reinecke | 768c72c | 2016-10-18 10:01:50 +0200 | [diff] [blame] | 1798 | * then fc_exch_timeout would be sending an abort. The fc_exch_done |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1799 | * call by fc_fcp_srr_error would prevent fc_exch.c from seeing |
| 1800 | * an abort response though. |
| 1801 | */ |
| 1802 | if (fh->fh_type == FC_TYPE_BLS) { |
| 1803 | fc_fcp_unlock_pkt(fsp); |
| 1804 | return; |
| 1805 | } |
| 1806 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1807 | switch (fc_frame_payload_op(fp)) { |
| 1808 | case ELS_LS_ACC: |
| 1809 | fsp->recov_retry = 0; |
Vasu Dev | f2817ec | 2011-04-01 16:06:40 -0700 | [diff] [blame] | 1810 | fc_fcp_timer_set(fsp, get_fsp_rec_tov(fsp)); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1811 | break; |
| 1812 | case ELS_LS_RJT: |
| 1813 | default: |
john fastabend | ac17ea8 | 2010-11-30 16:18:39 -0800 | [diff] [blame] | 1814 | fc_fcp_recovery(fsp, FC_ERROR); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1815 | break; |
| 1816 | } |
| 1817 | fc_fcp_unlock_pkt(fsp); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1818 | out: |
Hannes Reinecke | 768c72c | 2016-10-18 10:01:50 +0200 | [diff] [blame] | 1819 | fc_exch_done(seq); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1820 | fc_frame_free(fp); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1821 | } |
| 1822 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1823 | /** |
| 1824 | * fc_fcp_srr_error() - Handler for SRR errors |
| 1825 | * @fsp: The FCP packet that the SRR error is on |
| 1826 | * @fp: The SRR frame |
| 1827 | */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1828 | static void fc_fcp_srr_error(struct fc_fcp_pkt *fsp, struct fc_frame *fp) |
| 1829 | { |
| 1830 | if (fc_fcp_lock_pkt(fsp)) |
| 1831 | goto out; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1832 | switch (PTR_ERR(fp)) { |
| 1833 | case -FC_EX_TIMEOUT: |
Hannes Reinecke | 57d3ec7e | 2016-10-13 15:10:37 +0200 | [diff] [blame] | 1834 | FC_FCP_DBG(fsp, "SRR timeout, retries %d\n", fsp->recov_retry); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1835 | if (fsp->recov_retry++ < FC_MAX_RECOV_RETRY) |
| 1836 | fc_fcp_rec(fsp); |
| 1837 | else |
john fastabend | ac17ea8 | 2010-11-30 16:18:39 -0800 | [diff] [blame] | 1838 | fc_fcp_recovery(fsp, FC_TIMED_OUT); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1839 | break; |
| 1840 | case -FC_EX_CLOSED: /* e.g., link failure */ |
Hannes Reinecke | 57d3ec7e | 2016-10-13 15:10:37 +0200 | [diff] [blame] | 1841 | FC_FCP_DBG(fsp, "SRR error, exchange closed\n"); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1842 | /* fall through */ |
| 1843 | default: |
Hannes Reinecke | a0452bb | 2016-10-13 15:10:38 +0200 | [diff] [blame] | 1844 | fc_fcp_retry_cmd(fsp, FC_ERROR); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1845 | break; |
| 1846 | } |
| 1847 | fc_fcp_unlock_pkt(fsp); |
| 1848 | out: |
Hannes Reinecke | 768c72c | 2016-10-18 10:01:50 +0200 | [diff] [blame] | 1849 | fc_exch_done(fsp->recov_seq); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1850 | } |
| 1851 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1852 | /** |
| 1853 | * fc_fcp_lport_queue_ready() - Determine if the lport and it's queue is ready |
| 1854 | * @lport: The local port to be checked |
| 1855 | */ |
| 1856 | static inline int fc_fcp_lport_queue_ready(struct fc_lport *lport) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1857 | { |
| 1858 | /* lock ? */ |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1859 | return (lport->state == LPORT_ST_READY) && |
| 1860 | lport->link_up && !lport->qfull; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1861 | } |
| 1862 | |
| 1863 | /** |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1864 | * fc_queuecommand() - The queuecommand function of the SCSI template |
Robert Love | 04885b1 | 2011-01-28 16:04:29 -0800 | [diff] [blame] | 1865 | * @shost: The Scsi_Host that the command was issued to |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1866 | * @cmd: The scsi_cmnd to be executed |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1867 | * |
Robert Love | 04885b1 | 2011-01-28 16:04:29 -0800 | [diff] [blame] | 1868 | * This is the i/o strategy routine, called by the SCSI layer. |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1869 | */ |
Robert Love | 04885b1 | 2011-01-28 16:04:29 -0800 | [diff] [blame] | 1870 | int fc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *sc_cmd) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1871 | { |
Robert Love | 04885b1 | 2011-01-28 16:04:29 -0800 | [diff] [blame] | 1872 | struct fc_lport *lport = shost_priv(shost); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1873 | struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device)); |
| 1874 | struct fc_fcp_pkt *fsp; |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1875 | struct fc_rport_libfc_priv *rpriv; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1876 | int rval; |
| 1877 | int rc = 0; |
Vasu Dev | 1bd49b4 | 2012-05-25 10:26:43 -0700 | [diff] [blame] | 1878 | struct fc_stats *stats; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1879 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1880 | rval = fc_remote_port_chkready(rport); |
| 1881 | if (rval) { |
| 1882 | sc_cmd->result = rval; |
Robert Love | 04885b1 | 2011-01-28 16:04:29 -0800 | [diff] [blame] | 1883 | sc_cmd->scsi_done(sc_cmd); |
Mike Christie | be948fc | 2010-08-02 16:02:24 -0500 | [diff] [blame] | 1884 | return 0; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1885 | } |
| 1886 | |
| 1887 | if (!*(struct fc_remote_port **)rport->dd_data) { |
| 1888 | /* |
| 1889 | * rport is transitioning from blocked/deleted to |
| 1890 | * online |
| 1891 | */ |
| 1892 | sc_cmd->result = DID_IMM_RETRY << 16; |
Robert Love | 04885b1 | 2011-01-28 16:04:29 -0800 | [diff] [blame] | 1893 | sc_cmd->scsi_done(sc_cmd); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1894 | goto out; |
| 1895 | } |
| 1896 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1897 | rpriv = rport->dd_data; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1898 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1899 | if (!fc_fcp_lport_queue_ready(lport)) { |
Hannes Reinecke | 5d339d1 | 2016-10-13 15:10:48 +0200 | [diff] [blame] | 1900 | if (lport->qfull) { |
Hannes Reinecke | c106125 | 2017-04-27 16:25:03 +0200 | [diff] [blame] | 1901 | if (fc_fcp_can_queue_ramp_down(lport)) |
| 1902 | shost_printk(KERN_ERR, lport->host, |
| 1903 | "libfc: queue full, " |
| 1904 | "reducing can_queue to %d.\n", |
| 1905 | lport->host->can_queue); |
Hannes Reinecke | 5d339d1 | 2016-10-13 15:10:48 +0200 | [diff] [blame] | 1906 | } |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1907 | rc = SCSI_MLQUEUE_HOST_BUSY; |
| 1908 | goto out; |
| 1909 | } |
| 1910 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1911 | fsp = fc_fcp_pkt_alloc(lport, GFP_ATOMIC); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1912 | if (fsp == NULL) { |
| 1913 | rc = SCSI_MLQUEUE_HOST_BUSY; |
| 1914 | goto out; |
| 1915 | } |
| 1916 | |
| 1917 | /* |
| 1918 | * build the libfc request pkt |
| 1919 | */ |
| 1920 | fsp->cmd = sc_cmd; /* save the cmd */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1921 | fsp->rport = rport; /* set the remote port ptr */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1922 | |
| 1923 | /* |
| 1924 | * set up the transfer length |
| 1925 | */ |
| 1926 | fsp->data_len = scsi_bufflen(sc_cmd); |
| 1927 | fsp->xfer_len = 0; |
| 1928 | |
| 1929 | /* |
| 1930 | * setup the data direction |
| 1931 | */ |
Vasu Dev | 1bd49b4 | 2012-05-25 10:26:43 -0700 | [diff] [blame] | 1932 | stats = per_cpu_ptr(lport->stats, get_cpu()); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1933 | if (sc_cmd->sc_data_direction == DMA_FROM_DEVICE) { |
| 1934 | fsp->req_flags = FC_SRB_READ; |
| 1935 | stats->InputRequests++; |
Joe Eykholt | 5f0e385 | 2010-11-30 16:20:18 -0800 | [diff] [blame] | 1936 | stats->InputBytes += fsp->data_len; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1937 | } else if (sc_cmd->sc_data_direction == DMA_TO_DEVICE) { |
| 1938 | fsp->req_flags = FC_SRB_WRITE; |
| 1939 | stats->OutputRequests++; |
Joe Eykholt | 5f0e385 | 2010-11-30 16:20:18 -0800 | [diff] [blame] | 1940 | stats->OutputBytes += fsp->data_len; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1941 | } else { |
| 1942 | fsp->req_flags = 0; |
| 1943 | stats->ControlRequests++; |
| 1944 | } |
Joe Eykholt | f018b73 | 2010-03-12 16:08:55 -0800 | [diff] [blame] | 1945 | put_cpu(); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1946 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1947 | /* |
| 1948 | * send it to the lower layer |
| 1949 | * if we get -1 return then put the request in the pending |
| 1950 | * queue. |
| 1951 | */ |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1952 | rval = fc_fcp_pkt_send(lport, fsp); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1953 | if (rval != 0) { |
| 1954 | fsp->state = FC_SRB_FREE; |
| 1955 | fc_fcp_pkt_release(fsp); |
| 1956 | rc = SCSI_MLQUEUE_HOST_BUSY; |
| 1957 | } |
| 1958 | out: |
| 1959 | return rc; |
| 1960 | } |
| 1961 | EXPORT_SYMBOL(fc_queuecommand); |
| 1962 | |
| 1963 | /** |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1964 | * fc_io_compl() - Handle responses for completed commands |
| 1965 | * @fsp: The FCP packet that is complete |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1966 | * |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1967 | * Translates fcp_pkt errors to a Linux SCSI errors. |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1968 | * The fcp packet lock must be held when calling. |
| 1969 | */ |
| 1970 | static void fc_io_compl(struct fc_fcp_pkt *fsp) |
| 1971 | { |
| 1972 | struct fc_fcp_internal *si; |
| 1973 | struct scsi_cmnd *sc_cmd; |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1974 | struct fc_lport *lport; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1975 | unsigned long flags; |
| 1976 | |
Yi Zou | b277d2a | 2009-02-27 14:07:21 -0800 | [diff] [blame] | 1977 | /* release outstanding ddp context */ |
| 1978 | fc_fcp_ddp_done(fsp); |
| 1979 | |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1980 | fsp->state |= FC_SRB_COMPL; |
| 1981 | if (!(fsp->state & FC_SRB_FCP_PROCESSING_TMO)) { |
| 1982 | spin_unlock_bh(&fsp->scsi_pkt_lock); |
| 1983 | del_timer_sync(&fsp->timer); |
| 1984 | spin_lock_bh(&fsp->scsi_pkt_lock); |
| 1985 | } |
| 1986 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 1987 | lport = fsp->lp; |
| 1988 | si = fc_get_scsi_internal(lport); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1989 | |
| 1990 | /* |
Vasu Dev | 84c3e1a | 2009-11-03 11:48:06 -0800 | [diff] [blame] | 1991 | * if can_queue ramp down is done then try can_queue ramp up |
| 1992 | * since commands are completing now. |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1993 | */ |
Vasu Dev | 84c3e1a | 2009-11-03 11:48:06 -0800 | [diff] [blame] | 1994 | if (si->last_can_queue_ramp_down_time) |
| 1995 | fc_fcp_can_queue_ramp_up(lport); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1996 | |
| 1997 | sc_cmd = fsp->cmd; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 1998 | CMD_SCSI_STATUS(sc_cmd) = fsp->cdb_status; |
| 1999 | switch (fsp->status_code) { |
| 2000 | case FC_COMPLETE: |
| 2001 | if (fsp->cdb_status == 0) { |
| 2002 | /* |
| 2003 | * good I/O status |
| 2004 | */ |
| 2005 | sc_cmd->result = DID_OK << 16; |
| 2006 | if (fsp->scsi_resid) |
| 2007 | CMD_RESID_LEN(sc_cmd) = fsp->scsi_resid; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2008 | } else { |
| 2009 | /* |
| 2010 | * transport level I/O was ok but scsi |
| 2011 | * has non zero status |
| 2012 | */ |
| 2013 | sc_cmd->result = (DID_OK << 16) | fsp->cdb_status; |
| 2014 | } |
| 2015 | break; |
| 2016 | case FC_ERROR: |
Robert Love | b3ef990c | 2010-03-12 16:08:50 -0800 | [diff] [blame] | 2017 | FC_FCP_DBG(fsp, "Returning DID_ERROR to scsi-ml " |
| 2018 | "due to FC_ERROR\n"); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2019 | sc_cmd->result = DID_ERROR << 16; |
| 2020 | break; |
| 2021 | case FC_DATA_UNDRUN: |
Vasu Dev | 26d9cab | 2009-02-27 10:55:07 -0800 | [diff] [blame] | 2022 | if ((fsp->cdb_status == 0) && !(fsp->req_flags & FC_SRB_READ)) { |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2023 | /* |
| 2024 | * scsi status is good but transport level |
Vasu Dev | 26d9cab | 2009-02-27 10:55:07 -0800 | [diff] [blame] | 2025 | * underrun. |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2026 | */ |
Robert Love | b3ef990c | 2010-03-12 16:08:50 -0800 | [diff] [blame] | 2027 | if (fsp->state & FC_SRB_RCV_STATUS) { |
| 2028 | sc_cmd->result = DID_OK << 16; |
| 2029 | } else { |
| 2030 | FC_FCP_DBG(fsp, "Returning DID_ERROR to scsi-ml" |
| 2031 | " due to FC_DATA_UNDRUN (trans)\n"); |
| 2032 | sc_cmd->result = DID_ERROR << 16; |
| 2033 | } |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2034 | } else { |
| 2035 | /* |
| 2036 | * scsi got underrun, this is an error |
| 2037 | */ |
Robert Love | b3ef990c | 2010-03-12 16:08:50 -0800 | [diff] [blame] | 2038 | FC_FCP_DBG(fsp, "Returning DID_ERROR to scsi-ml " |
| 2039 | "due to FC_DATA_UNDRUN (scsi)\n"); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2040 | CMD_RESID_LEN(sc_cmd) = fsp->scsi_resid; |
| 2041 | sc_cmd->result = (DID_ERROR << 16) | fsp->cdb_status; |
| 2042 | } |
| 2043 | break; |
| 2044 | case FC_DATA_OVRRUN: |
| 2045 | /* |
| 2046 | * overrun is an error |
| 2047 | */ |
Robert Love | b3ef990c | 2010-03-12 16:08:50 -0800 | [diff] [blame] | 2048 | FC_FCP_DBG(fsp, "Returning DID_ERROR to scsi-ml " |
| 2049 | "due to FC_DATA_OVRRUN\n"); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2050 | sc_cmd->result = (DID_ERROR << 16) | fsp->cdb_status; |
| 2051 | break; |
| 2052 | case FC_CMD_ABORTED: |
Hannes Reinecke | 0f4c16a | 2016-10-13 15:10:43 +0200 | [diff] [blame] | 2053 | if (host_byte(sc_cmd->result) == DID_TIME_OUT) |
| 2054 | FC_FCP_DBG(fsp, "Returning DID_TIME_OUT to scsi-ml " |
| 2055 | "due to FC_CMD_ABORTED\n"); |
| 2056 | else { |
| 2057 | FC_FCP_DBG(fsp, "Returning DID_ERROR to scsi-ml " |
| 2058 | "due to FC_CMD_ABORTED\n"); |
| 2059 | set_host_byte(sc_cmd, DID_ERROR); |
| 2060 | } |
| 2061 | sc_cmd->result |= fsp->io_status; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2062 | break; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2063 | case FC_CMD_RESET: |
john fastabend | ac17ea8 | 2010-11-30 16:18:39 -0800 | [diff] [blame] | 2064 | FC_FCP_DBG(fsp, "Returning DID_RESET to scsi-ml " |
| 2065 | "due to FC_CMD_RESET\n"); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2066 | sc_cmd->result = (DID_RESET << 16); |
| 2067 | break; |
Hannes Reinecke | a0452bb | 2016-10-13 15:10:38 +0200 | [diff] [blame] | 2068 | case FC_TRANS_RESET: |
| 2069 | FC_FCP_DBG(fsp, "Returning DID_SOFT_ERROR to scsi-ml " |
| 2070 | "due to FC_TRANS_RESET\n"); |
| 2071 | sc_cmd->result = (DID_SOFT_ERROR << 16); |
| 2072 | break; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2073 | case FC_HRD_ERROR: |
john fastabend | ac17ea8 | 2010-11-30 16:18:39 -0800 | [diff] [blame] | 2074 | FC_FCP_DBG(fsp, "Returning DID_NO_CONNECT to scsi-ml " |
| 2075 | "due to FC_HRD_ERROR\n"); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2076 | sc_cmd->result = (DID_NO_CONNECT << 16); |
| 2077 | break; |
john fastabend | ac17ea8 | 2010-11-30 16:18:39 -0800 | [diff] [blame] | 2078 | case FC_CRC_ERROR: |
| 2079 | FC_FCP_DBG(fsp, "Returning DID_PARITY to scsi-ml " |
| 2080 | "due to FC_CRC_ERROR\n"); |
| 2081 | sc_cmd->result = (DID_PARITY << 16); |
| 2082 | break; |
| 2083 | case FC_TIMED_OUT: |
| 2084 | FC_FCP_DBG(fsp, "Returning DID_BUS_BUSY to scsi-ml " |
| 2085 | "due to FC_TIMED_OUT\n"); |
| 2086 | sc_cmd->result = (DID_BUS_BUSY << 16) | fsp->io_status; |
| 2087 | break; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2088 | default: |
Robert Love | b3ef990c | 2010-03-12 16:08:50 -0800 | [diff] [blame] | 2089 | FC_FCP_DBG(fsp, "Returning DID_ERROR to scsi-ml " |
| 2090 | "due to unknown error\n"); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2091 | sc_cmd->result = (DID_ERROR << 16); |
| 2092 | break; |
| 2093 | } |
| 2094 | |
Vasu Dev | 75eee72 | 2010-10-08 17:12:15 -0700 | [diff] [blame] | 2095 | if (lport->state != LPORT_ST_READY && fsp->status_code != FC_COMPLETE) |
| 2096 | sc_cmd->result = (DID_TRANSPORT_DISRUPTED << 16); |
Vasu Dev | e0d93c5 | 2010-07-20 15:19:20 -0700 | [diff] [blame] | 2097 | |
Chris Leech | c1ecb90 | 2009-12-10 09:59:26 -0800 | [diff] [blame] | 2098 | spin_lock_irqsave(&si->scsi_queue_lock, flags); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2099 | list_del(&fsp->list); |
| 2100 | sc_cmd->SCp.ptr = NULL; |
Vasu Dev | 8b7ac2b | 2010-10-08 17:12:31 -0700 | [diff] [blame] | 2101 | spin_unlock_irqrestore(&si->scsi_queue_lock, flags); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2102 | sc_cmd->scsi_done(sc_cmd); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2103 | |
| 2104 | /* release ref from initial allocation in queue command */ |
| 2105 | fc_fcp_pkt_release(fsp); |
| 2106 | } |
| 2107 | |
| 2108 | /** |
Robert Love | 34f42a0 | 2009-02-27 10:55:45 -0800 | [diff] [blame] | 2109 | * fc_eh_abort() - Abort a command |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 2110 | * @sc_cmd: The SCSI command to abort |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2111 | * |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 2112 | * From SCSI host template. |
| 2113 | * Send an ABTS to the target device and wait for the response. |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2114 | */ |
| 2115 | int fc_eh_abort(struct scsi_cmnd *sc_cmd) |
| 2116 | { |
| 2117 | struct fc_fcp_pkt *fsp; |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 2118 | struct fc_lport *lport; |
Vasu Dev | 8b7ac2b | 2010-10-08 17:12:31 -0700 | [diff] [blame] | 2119 | struct fc_fcp_internal *si; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2120 | int rc = FAILED; |
| 2121 | unsigned long flags; |
Vasu Dev | 21cc0bd3 | 2011-08-25 12:40:57 -0700 | [diff] [blame] | 2122 | int rval; |
| 2123 | |
| 2124 | rval = fc_block_scsi_eh(sc_cmd); |
| 2125 | if (rval) |
| 2126 | return rval; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2127 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 2128 | lport = shost_priv(sc_cmd->device->host); |
| 2129 | if (lport->state != LPORT_ST_READY) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2130 | return rc; |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 2131 | else if (!lport->link_up) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2132 | return rc; |
| 2133 | |
Vasu Dev | 8b7ac2b | 2010-10-08 17:12:31 -0700 | [diff] [blame] | 2134 | si = fc_get_scsi_internal(lport); |
| 2135 | spin_lock_irqsave(&si->scsi_queue_lock, flags); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2136 | fsp = CMD_SP(sc_cmd); |
| 2137 | if (!fsp) { |
| 2138 | /* command completed while scsi eh was setting up */ |
Robert Love | 3c2c3bf | 2010-11-30 16:18:23 -0800 | [diff] [blame] | 2139 | spin_unlock_irqrestore(&si->scsi_queue_lock, flags); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2140 | return SUCCESS; |
| 2141 | } |
Geert Uytterhoeven | 83a35e3 | 2013-06-28 11:27:31 +0200 | [diff] [blame] | 2142 | /* grab a ref so the fsp and sc_cmd cannot be released from under us */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2143 | fc_fcp_pkt_hold(fsp); |
Vasu Dev | 8b7ac2b | 2010-10-08 17:12:31 -0700 | [diff] [blame] | 2144 | spin_unlock_irqrestore(&si->scsi_queue_lock, flags); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2145 | |
| 2146 | if (fc_fcp_lock_pkt(fsp)) { |
| 2147 | /* completed while we were waiting for timer to be deleted */ |
| 2148 | rc = SUCCESS; |
| 2149 | goto release_pkt; |
| 2150 | } |
| 2151 | |
Robert Love | c340111 | 2009-10-21 16:27:06 -0700 | [diff] [blame] | 2152 | rc = fc_fcp_pkt_abort(fsp); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2153 | fc_fcp_unlock_pkt(fsp); |
| 2154 | |
| 2155 | release_pkt: |
| 2156 | fc_fcp_pkt_release(fsp); |
| 2157 | return rc; |
| 2158 | } |
| 2159 | EXPORT_SYMBOL(fc_eh_abort); |
| 2160 | |
| 2161 | /** |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 2162 | * fc_eh_device_reset() - Reset a single LUN |
| 2163 | * @sc_cmd: The SCSI command which identifies the device whose |
| 2164 | * LUN is to be reset |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2165 | * |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 2166 | * Set from SCSI host template. |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2167 | */ |
| 2168 | int fc_eh_device_reset(struct scsi_cmnd *sc_cmd) |
| 2169 | { |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 2170 | struct fc_lport *lport; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2171 | struct fc_fcp_pkt *fsp; |
| 2172 | struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device)); |
| 2173 | int rc = FAILED; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2174 | int rval; |
| 2175 | |
Vasu Dev | 21cc0bd3 | 2011-08-25 12:40:57 -0700 | [diff] [blame] | 2176 | rval = fc_block_scsi_eh(sc_cmd); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2177 | if (rval) |
Vasu Dev | 21cc0bd3 | 2011-08-25 12:40:57 -0700 | [diff] [blame] | 2178 | return rval; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2179 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 2180 | lport = shost_priv(sc_cmd->device->host); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2181 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 2182 | if (lport->state != LPORT_ST_READY) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2183 | return rc; |
| 2184 | |
Chris Leech | ce8b5df | 2010-04-09 14:23:10 -0700 | [diff] [blame] | 2185 | FC_SCSI_DBG(lport, "Resetting rport (%6.6x)\n", rport->port_id); |
Robert Love | 7414705 | 2009-06-10 15:31:10 -0700 | [diff] [blame] | 2186 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 2187 | fsp = fc_fcp_pkt_alloc(lport, GFP_NOIO); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2188 | if (fsp == NULL) { |
Robert Love | 7414705 | 2009-06-10 15:31:10 -0700 | [diff] [blame] | 2189 | printk(KERN_WARNING "libfc: could not allocate scsi_pkt\n"); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2190 | goto out; |
| 2191 | } |
| 2192 | |
| 2193 | /* |
| 2194 | * Build the libfc request pkt. Do not set the scsi cmnd, because |
| 2195 | * the sc passed in is not setup for execution like when sent |
| 2196 | * through the queuecommand callout. |
| 2197 | */ |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2198 | fsp->rport = rport; /* set the remote port ptr */ |
| 2199 | |
| 2200 | /* |
| 2201 | * flush outstanding commands |
| 2202 | */ |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 2203 | rc = fc_lun_reset(lport, fsp, scmd_id(sc_cmd), sc_cmd->device->lun); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2204 | fsp->state = FC_SRB_FREE; |
| 2205 | fc_fcp_pkt_release(fsp); |
| 2206 | |
| 2207 | out: |
| 2208 | return rc; |
| 2209 | } |
| 2210 | EXPORT_SYMBOL(fc_eh_device_reset); |
| 2211 | |
| 2212 | /** |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 2213 | * fc_eh_host_reset() - Reset a Scsi_Host. |
| 2214 | * @sc_cmd: The SCSI command that identifies the SCSI host to be reset |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2215 | */ |
| 2216 | int fc_eh_host_reset(struct scsi_cmnd *sc_cmd) |
| 2217 | { |
| 2218 | struct Scsi_Host *shost = sc_cmd->device->host; |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 2219 | struct fc_lport *lport = shost_priv(shost); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2220 | unsigned long wait_tmo; |
| 2221 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 2222 | FC_SCSI_DBG(lport, "Resetting host\n"); |
Robert Love | 7414705 | 2009-06-10 15:31:10 -0700 | [diff] [blame] | 2223 | |
Hannes Reinecke | 31c0a63 | 2016-10-18 10:01:36 +0200 | [diff] [blame] | 2224 | fc_lport_reset(lport); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2225 | wait_tmo = jiffies + FC_HOST_RESET_TIMEOUT; |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 2226 | while (!fc_fcp_lport_queue_ready(lport) && time_before(jiffies, |
| 2227 | wait_tmo)) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2228 | msleep(1000); |
| 2229 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 2230 | if (fc_fcp_lport_queue_ready(lport)) { |
Robert Love | 7414705 | 2009-06-10 15:31:10 -0700 | [diff] [blame] | 2231 | shost_printk(KERN_INFO, shost, "libfc: Host reset succeeded " |
Robert Love | 7b2787e | 2010-05-07 15:18:41 -0700 | [diff] [blame] | 2232 | "on port (%6.6x)\n", lport->port_id); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2233 | return SUCCESS; |
| 2234 | } else { |
Robert Love | 7414705 | 2009-06-10 15:31:10 -0700 | [diff] [blame] | 2235 | shost_printk(KERN_INFO, shost, "libfc: Host reset failed, " |
Chris Leech | ce8b5df | 2010-04-09 14:23:10 -0700 | [diff] [blame] | 2236 | "port (%6.6x) is not ready.\n", |
Robert Love | 7b2787e | 2010-05-07 15:18:41 -0700 | [diff] [blame] | 2237 | lport->port_id); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2238 | return FAILED; |
| 2239 | } |
| 2240 | } |
| 2241 | EXPORT_SYMBOL(fc_eh_host_reset); |
| 2242 | |
| 2243 | /** |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 2244 | * fc_slave_alloc() - Configure the queue depth of a Scsi_Host |
| 2245 | * @sdev: The SCSI device that identifies the SCSI host |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2246 | * |
| 2247 | * Configures queue depth based on host's cmd_per_len. If not set |
| 2248 | * then we use the libfc default. |
| 2249 | */ |
| 2250 | int fc_slave_alloc(struct scsi_device *sdev) |
| 2251 | { |
| 2252 | struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2253 | |
| 2254 | if (!rport || fc_remote_port_chkready(rport)) |
| 2255 | return -ENXIO; |
| 2256 | |
Christoph Hellwig | db5ed4d | 2014-11-13 15:08:42 +0100 | [diff] [blame] | 2257 | scsi_change_queue_depth(sdev, FC_FCP_DFLT_QUEUE_DEPTH); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2258 | return 0; |
| 2259 | } |
| 2260 | EXPORT_SYMBOL(fc_slave_alloc); |
| 2261 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 2262 | /** |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 2263 | * fc_fcp_destory() - Tear down the FCP layer for a given local port |
| 2264 | * @lport: The local port that no longer needs the FCP layer |
| 2265 | */ |
| 2266 | void fc_fcp_destroy(struct fc_lport *lport) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2267 | { |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 2268 | struct fc_fcp_internal *si = fc_get_scsi_internal(lport); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2269 | |
| 2270 | if (!list_empty(&si->scsi_pkt_queue)) |
Robert Love | 7414705 | 2009-06-10 15:31:10 -0700 | [diff] [blame] | 2271 | printk(KERN_ERR "libfc: Leaked SCSI packets when destroying " |
Robert Love | 7b2787e | 2010-05-07 15:18:41 -0700 | [diff] [blame] | 2272 | "port (%6.6x)\n", lport->port_id); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2273 | |
| 2274 | mempool_destroy(si->scsi_pkt_pool); |
| 2275 | kfree(si); |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 2276 | lport->scsi_priv = NULL; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2277 | } |
| 2278 | EXPORT_SYMBOL(fc_fcp_destroy); |
| 2279 | |
Randy Dunlap | 5520490 | 2011-01-28 16:03:57 -0800 | [diff] [blame] | 2280 | int fc_setup_fcp(void) |
Robert Love | 93e6d5a | 2009-11-03 11:46:03 -0800 | [diff] [blame] | 2281 | { |
| 2282 | int rc = 0; |
| 2283 | |
| 2284 | scsi_pkt_cachep = kmem_cache_create("libfc_fcp_pkt", |
| 2285 | sizeof(struct fc_fcp_pkt), |
| 2286 | 0, SLAB_HWCACHE_ALIGN, NULL); |
| 2287 | if (!scsi_pkt_cachep) { |
| 2288 | printk(KERN_ERR "libfc: Unable to allocate SRB cache, " |
| 2289 | "module load failed!"); |
| 2290 | rc = -ENOMEM; |
| 2291 | } |
| 2292 | |
| 2293 | return rc; |
| 2294 | } |
| 2295 | |
Randy Dunlap | 5520490 | 2011-01-28 16:03:57 -0800 | [diff] [blame] | 2296 | void fc_destroy_fcp(void) |
Robert Love | 93e6d5a | 2009-11-03 11:46:03 -0800 | [diff] [blame] | 2297 | { |
| 2298 | if (scsi_pkt_cachep) |
| 2299 | kmem_cache_destroy(scsi_pkt_cachep); |
| 2300 | } |
| 2301 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 2302 | /** |
| 2303 | * fc_fcp_init() - Initialize the FCP layer for a local port |
| 2304 | * @lport: The local port to initialize the exchange layer for |
| 2305 | */ |
| 2306 | int fc_fcp_init(struct fc_lport *lport) |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2307 | { |
| 2308 | int rc; |
| 2309 | struct fc_fcp_internal *si; |
| 2310 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 2311 | if (!lport->tt.fcp_cmd_send) |
| 2312 | lport->tt.fcp_cmd_send = fc_fcp_cmd_send; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2313 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 2314 | if (!lport->tt.fcp_cleanup) |
| 2315 | lport->tt.fcp_cleanup = fc_fcp_cleanup; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2316 | |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 2317 | if (!lport->tt.fcp_abort_io) |
| 2318 | lport->tt.fcp_abort_io = fc_fcp_abort_io; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2319 | |
| 2320 | si = kzalloc(sizeof(struct fc_fcp_internal), GFP_KERNEL); |
| 2321 | if (!si) |
| 2322 | return -ENOMEM; |
Robert Love | 3a3b42b | 2009-11-03 11:47:39 -0800 | [diff] [blame] | 2323 | lport->scsi_priv = si; |
Vasu Dev | 84c3e1a | 2009-11-03 11:48:06 -0800 | [diff] [blame] | 2324 | si->max_can_queue = lport->host->can_queue; |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2325 | INIT_LIST_HEAD(&si->scsi_pkt_queue); |
Chris Leech | c1ecb90 | 2009-12-10 09:59:26 -0800 | [diff] [blame] | 2326 | spin_lock_init(&si->scsi_queue_lock); |
Robert Love | 42e9a92 | 2008-12-09 15:10:17 -0800 | [diff] [blame] | 2327 | |
| 2328 | si->scsi_pkt_pool = mempool_create_slab_pool(2, scsi_pkt_cachep); |
| 2329 | if (!si->scsi_pkt_pool) { |
| 2330 | rc = -ENOMEM; |
| 2331 | goto free_internal; |
| 2332 | } |
| 2333 | return 0; |
| 2334 | |
| 2335 | free_internal: |
| 2336 | kfree(si); |
| 2337 | return rc; |
| 2338 | } |
| 2339 | EXPORT_SYMBOL(fc_fcp_init); |