Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * sbp2.c - SBP-2 protocol driver for IEEE-1394 |
| 3 | * |
| 4 | * Copyright (C) 2000 James Goodwin, Filanet Corporation (www.filanet.com) |
| 5 | * jamesg@filanet.com (JSG) |
| 6 | * |
| 7 | * Copyright (C) 2003 Ben Collins <bcollins@debian.org> |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software Foundation, |
| 21 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 22 | */ |
| 23 | |
| 24 | /* |
| 25 | * Brief Description: |
| 26 | * |
| 27 | * This driver implements the Serial Bus Protocol 2 (SBP-2) over IEEE-1394 |
| 28 | * under Linux. The SBP-2 driver is implemented as an IEEE-1394 high-level |
| 29 | * driver. It also registers as a SCSI lower-level driver in order to accept |
| 30 | * SCSI commands for transport using SBP-2. |
| 31 | * |
Stefan Richter | 2a533b1 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 32 | * You may access any attached SBP-2 (usually storage devices) as regular |
| 33 | * SCSI devices. E.g. mount /dev/sda1, fdisk, mkfs, etc.. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | * |
Stefan Richter | 2a533b1 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 35 | * See http://www.t10.org/drafts.htm#sbp2 for the final draft of the SBP-2 |
| 36 | * specification and for where to purchase the official standard. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | * |
Stefan Richter | 2a533b1 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 38 | * TODO: |
| 39 | * - look into possible improvements of the SCSI error handlers |
| 40 | * - handle Unit_Characteristics.mgt_ORB_timeout and .ORB_size |
| 41 | * - handle Logical_Unit_Number.ordered |
| 42 | * - handle src == 1 in status blocks |
| 43 | * - reimplement the DMA mapping in absence of physical DMA so that |
| 44 | * bus_to_virt is no longer required |
| 45 | * - debug the handling of absent physical DMA |
| 46 | * - replace CONFIG_IEEE1394_SBP2_PHYS_DMA by automatic detection |
| 47 | * (this is easy but depends on the previous two TODO items) |
| 48 | * - make the parameter serialize_io configurable per device |
| 49 | * - move all requests to fetch agent registers into non-atomic context, |
| 50 | * replace all usages of sbp2util_node_write_no_wait by true transactions |
Stefan Richter | 2a533b1 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 51 | * Grep for inline FIXME comments below. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | */ |
| 53 | |
Stefan Richter | 4e6343a | 2007-12-16 17:31:26 +0100 | [diff] [blame] | 54 | #include <linux/blkdev.h> |
Stefan Richter | 902abed | 2006-08-14 18:56:00 +0200 | [diff] [blame] | 55 | #include <linux/compiler.h> |
| 56 | #include <linux/delay.h> |
| 57 | #include <linux/device.h> |
| 58 | #include <linux/dma-mapping.h> |
| 59 | #include <linux/gfp.h> |
| 60 | #include <linux/init.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | #include <linux/kernel.h> |
| 62 | #include <linux/list.h> |
Andrew Morton | f84c922 | 2007-04-23 11:50:56 -0700 | [diff] [blame] | 63 | #include <linux/mm.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | #include <linux/module.h> |
| 65 | #include <linux/moduleparam.h> |
Andrew Morton | f84c922 | 2007-04-23 11:50:56 -0700 | [diff] [blame] | 66 | #include <linux/sched.h> |
Stefan Richter | 902abed | 2006-08-14 18:56:00 +0200 | [diff] [blame] | 67 | #include <linux/slab.h> |
| 68 | #include <linux/spinlock.h> |
| 69 | #include <linux/stat.h> |
| 70 | #include <linux/string.h> |
| 71 | #include <linux/stringify.h> |
| 72 | #include <linux/types.h> |
Stefan Richter | e8398bb | 2006-07-23 22:19:00 +0200 | [diff] [blame] | 73 | #include <linux/wait.h> |
Stefan Richter | 20e2008 | 2007-05-05 17:18:12 +0200 | [diff] [blame] | 74 | #include <linux/workqueue.h> |
Adrian Bunk | 87ae9af | 2007-10-30 10:35:04 +0100 | [diff] [blame] | 75 | #include <linux/scatterlist.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | #include <asm/byteorder.h> |
Stefan Richter | 902abed | 2006-08-14 18:56:00 +0200 | [diff] [blame] | 78 | #include <asm/errno.h> |
| 79 | #include <asm/param.h> |
Stefan Richter | 902abed | 2006-08-14 18:56:00 +0200 | [diff] [blame] | 80 | #include <asm/system.h> |
| 81 | #include <asm/types.h> |
| 82 | |
| 83 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA |
| 84 | #include <asm/io.h> /* for bus_to_virt */ |
| 85 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | |
| 87 | #include <scsi/scsi.h> |
| 88 | #include <scsi/scsi_cmnd.h> |
| 89 | #include <scsi/scsi_dbg.h> |
| 90 | #include <scsi/scsi_device.h> |
| 91 | #include <scsi/scsi_host.h> |
| 92 | |
| 93 | #include "csr1212.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | #include "highlevel.h" |
Stefan Richter | 902abed | 2006-08-14 18:56:00 +0200 | [diff] [blame] | 95 | #include "hosts.h" |
| 96 | #include "ieee1394.h" |
| 97 | #include "ieee1394_core.h" |
| 98 | #include "ieee1394_hotplug.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | #include "ieee1394_transactions.h" |
Stefan Richter | 902abed | 2006-08-14 18:56:00 +0200 | [diff] [blame] | 100 | #include "ieee1394_types.h" |
| 101 | #include "nodemgr.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | #include "sbp2.h" |
| 103 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | /* |
| 105 | * Module load parameter definitions |
| 106 | */ |
| 107 | |
| 108 | /* |
| 109 | * Change max_speed on module load if you have a bad IEEE-1394 |
| 110 | * controller that has trouble running 2KB packets at 400mb. |
| 111 | * |
| 112 | * NOTE: On certain OHCI parts I have seen short packets on async transmit |
| 113 | * (probably due to PCI latency/throughput issues with the part). You can |
| 114 | * bump down the speed if you are running into problems. |
| 115 | */ |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 116 | static int sbp2_max_speed = IEEE1394_SPEED_MAX; |
| 117 | module_param_named(max_speed, sbp2_max_speed, int, 0644); |
Stefan Richter | 28b0667 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 118 | MODULE_PARM_DESC(max_speed, "Force max speed " |
| 119 | "(3 = 800Mb/s, 2 = 400Mb/s, 1 = 200Mb/s, 0 = 100Mb/s)"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | |
| 121 | /* |
Stefan Richter | 77bba7a | 2007-06-17 23:54:52 +0200 | [diff] [blame] | 122 | * Set serialize_io to 0 or N to use dynamically appended lists of command ORBs. |
| 123 | * This is and always has been buggy in multiple subtle ways. See above TODOs. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | */ |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 125 | static int sbp2_serialize_io = 1; |
Stefan Richter | 77bba7a | 2007-06-17 23:54:52 +0200 | [diff] [blame] | 126 | module_param_named(serialize_io, sbp2_serialize_io, bool, 0444); |
| 127 | MODULE_PARM_DESC(serialize_io, "Serialize requests coming from SCSI drivers " |
| 128 | "(default = Y, faster but buggy = N)"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | |
| 130 | /* |
Stefan Richter | 4e6343a | 2007-12-16 17:31:26 +0100 | [diff] [blame] | 131 | * Adjust max_sectors if you'd like to influence how many sectors each SCSI |
| 132 | * command can transfer at most. Please note that some older SBP-2 bridge |
| 133 | * chips are broken for transfers greater or equal to 128KB, therefore |
| 134 | * max_sectors used to be a safe 255 sectors for many years. We now have a |
| 135 | * default of 0 here which means that we let the SCSI stack choose a limit. |
| 136 | * |
| 137 | * The SBP2_WORKAROUND_128K_MAX_TRANS flag, if set either in the workarounds |
| 138 | * module parameter or in the sbp2_workarounds_table[], will override the |
| 139 | * value of max_sectors. We should use sbp2_workarounds_table[] to cover any |
| 140 | * bridge chip which becomes known to need the 255 sectors limit. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | */ |
Stefan Richter | 4e6343a | 2007-12-16 17:31:26 +0100 | [diff] [blame] | 142 | static int sbp2_max_sectors; |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 143 | module_param_named(max_sectors, sbp2_max_sectors, int, 0444); |
| 144 | MODULE_PARM_DESC(max_sectors, "Change max sectors per I/O supported " |
Stefan Richter | 4e6343a | 2007-12-16 17:31:26 +0100 | [diff] [blame] | 145 | "(default = 0 = use SCSI stack's default)"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | |
| 147 | /* |
| 148 | * Exclusive login to sbp2 device? In most cases, the sbp2 driver should |
| 149 | * do an exclusive login, as it's generally unsafe to have two hosts |
| 150 | * talking to a single sbp2 device at the same time (filesystem coherency, |
| 151 | * etc.). If you're running an sbp2 device that supports multiple logins, |
| 152 | * and you're either running read-only filesystems or some sort of special |
Ben Collins | 20f4578 | 2006-06-12 18:13:11 -0400 | [diff] [blame] | 153 | * filesystem supporting multiple hosts, e.g. OpenGFS, Oracle Cluster |
| 154 | * File System, or Lustre, then set exclusive_login to zero. |
| 155 | * |
| 156 | * So far only bridges from Oxford Semiconductor are known to support |
| 157 | * concurrent logins. Depending on firmware, four or two concurrent logins |
| 158 | * are possible on OXFW911 and newer Oxsemi bridges. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | */ |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 160 | static int sbp2_exclusive_login = 1; |
Stefan Richter | 77bba7a | 2007-06-17 23:54:52 +0200 | [diff] [blame] | 161 | module_param_named(exclusive_login, sbp2_exclusive_login, bool, 0644); |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 162 | MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device " |
Stefan Richter | 77bba7a | 2007-06-17 23:54:52 +0200 | [diff] [blame] | 163 | "(default = Y, use N for concurrent initiators)"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | |
| 165 | /* |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 166 | * If any of the following workarounds is required for your device to work, |
| 167 | * please submit the kernel messages logged by sbp2 to the linux1394-devel |
| 168 | * mailing list. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | * |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 170 | * - 128kB max transfer |
| 171 | * Limit transfer size. Necessary for some old bridges. |
| 172 | * |
| 173 | * - 36 byte inquiry |
| 174 | * When scsi_mod probes the device, let the inquiry command look like that |
| 175 | * from MS Windows. |
| 176 | * |
| 177 | * - skip mode page 8 |
| 178 | * Suppress sending of mode_sense for mode page 8 if the device pretends to |
| 179 | * support the SCSI Primary Block commands instead of Reduced Block Commands. |
Stefan Richter | e9a1c52 | 2006-05-15 22:06:37 +0200 | [diff] [blame] | 180 | * |
| 181 | * - fix capacity |
| 182 | * Tell sd_mod to correct the last sector number reported by read_capacity. |
| 183 | * Avoids access beyond actual disk limits on devices with an off-by-one bug. |
| 184 | * Don't use this with devices which don't have this bug. |
Stefan Richter | 679c0cd | 2006-05-15 22:08:09 +0200 | [diff] [blame] | 185 | * |
Stefan Richter | d94a983 | 2008-02-03 23:07:44 +0100 | [diff] [blame] | 186 | * - delay inquiry |
| 187 | * Wait extra SBP2_INQUIRY_DELAY seconds after login before SCSI inquiry. |
| 188 | * |
Stefan Richter | 3719122 | 2008-05-11 00:35:55 +0200 | [diff] [blame] | 189 | * - power condition |
| 190 | * Set the power condition field in the START STOP UNIT commands sent by |
| 191 | * sd_mod on suspend, resume, and shutdown (if manage_start_stop is on). |
| 192 | * Some disks need this to spin down or to resume properly. |
| 193 | * |
Stefan Richter | 679c0cd | 2006-05-15 22:08:09 +0200 | [diff] [blame] | 194 | * - override internal blacklist |
| 195 | * Instead of adding to the built-in blacklist, use only the workarounds |
| 196 | * specified in the module load parameter. |
| 197 | * Useful if a blacklist entry interfered with a non-broken device. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | */ |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 199 | static int sbp2_default_workarounds; |
| 200 | module_param_named(workarounds, sbp2_default_workarounds, int, 0644); |
| 201 | MODULE_PARM_DESC(workarounds, "Work around device bugs (default = 0" |
| 202 | ", 128kB max transfer = " __stringify(SBP2_WORKAROUND_128K_MAX_TRANS) |
| 203 | ", 36 byte inquiry = " __stringify(SBP2_WORKAROUND_INQUIRY_36) |
| 204 | ", skip mode page 8 = " __stringify(SBP2_WORKAROUND_MODE_SENSE_8) |
Stefan Richter | e9a1c52 | 2006-05-15 22:06:37 +0200 | [diff] [blame] | 205 | ", fix capacity = " __stringify(SBP2_WORKAROUND_FIX_CAPACITY) |
Stefan Richter | d94a983 | 2008-02-03 23:07:44 +0100 | [diff] [blame] | 206 | ", delay inquiry = " __stringify(SBP2_WORKAROUND_DELAY_INQUIRY) |
Stefan Richter | 3719122 | 2008-05-11 00:35:55 +0200 | [diff] [blame] | 207 | ", set power condition in start stop unit = " |
| 208 | __stringify(SBP2_WORKAROUND_POWER_CONDITION) |
Stefan Richter | 679c0cd | 2006-05-15 22:08:09 +0200 | [diff] [blame] | 209 | ", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE) |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 210 | ", or a combination)"); |
| 211 | |
Stefan Richter | d7794c8 | 2007-05-27 13:17:15 +0200 | [diff] [blame] | 212 | /* |
| 213 | * This influences the format of the sysfs attribute |
| 214 | * /sys/bus/scsi/devices/.../ieee1394_id. |
| 215 | * |
| 216 | * The default format is like in older kernels: %016Lx:%d:%d |
| 217 | * It contains the target's EUI-64, a number given to the logical unit by |
| 218 | * the ieee1394 driver's nodemgr (starting at 0), and the LUN. |
| 219 | * |
| 220 | * The long format is: %016Lx:%06x:%04x |
| 221 | * It contains the target's EUI-64, the unit directory's directory_ID as per |
| 222 | * IEEE 1212 clause 7.7.19, and the LUN. This format comes closest to the |
| 223 | * format of SBP(-3) target port and logical unit identifier as per SAM (SCSI |
| 224 | * Architecture Model) rev.2 to 4 annex A. Therefore and because it is |
| 225 | * independent of the implementation of the ieee1394 nodemgr, the longer format |
| 226 | * is recommended for future use. |
| 227 | */ |
| 228 | static int sbp2_long_sysfs_ieee1394_id; |
| 229 | module_param_named(long_ieee1394_id, sbp2_long_sysfs_ieee1394_id, bool, 0644); |
| 230 | MODULE_PARM_DESC(long_ieee1394_id, "8+3+2 bytes format of ieee1394_id in sysfs " |
| 231 | "(default = backwards-compatible = N, SAM-conforming = Y)"); |
| 232 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | |
Stefan Richter | edf1fb2 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 234 | #define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args) |
| 235 | #define SBP2_ERR(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | /* |
| 238 | * Globals |
| 239 | */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 240 | static void sbp2scsi_complete_all_commands(struct sbp2_lu *, u32); |
| 241 | static void sbp2scsi_complete_command(struct sbp2_lu *, u32, struct scsi_cmnd *, |
Stefan Richter | ea42ea0 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 242 | void (*)(struct scsi_cmnd *)); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 243 | static struct sbp2_lu *sbp2_alloc_device(struct unit_directory *); |
| 244 | static int sbp2_start_device(struct sbp2_lu *); |
| 245 | static void sbp2_remove_device(struct sbp2_lu *); |
| 246 | static int sbp2_login_device(struct sbp2_lu *); |
| 247 | static int sbp2_reconnect_device(struct sbp2_lu *); |
| 248 | static int sbp2_logout_device(struct sbp2_lu *); |
Stefan Richter | ea42ea0 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 249 | static void sbp2_host_reset(struct hpsb_host *); |
| 250 | static int sbp2_handle_status_write(struct hpsb_host *, int, int, quadlet_t *, |
| 251 | u64, size_t, u16); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 252 | static int sbp2_agent_reset(struct sbp2_lu *, int); |
| 253 | static void sbp2_parse_unit_directory(struct sbp2_lu *, |
Stefan Richter | ea42ea0 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 254 | struct unit_directory *); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 255 | static int sbp2_set_busy_timeout(struct sbp2_lu *); |
| 256 | static int sbp2_max_speed_and_size(struct sbp2_lu *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | |
| 259 | static const u8 sbp2_speedto_max_payload[] = { 0x7, 0x8, 0x9, 0xA, 0xB, 0xC }; |
| 260 | |
Stefan Richter | 261b5f6 | 2007-08-11 11:52:08 +0200 | [diff] [blame] | 261 | static DEFINE_RWLOCK(sbp2_hi_logical_units_lock); |
| 262 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | static struct hpsb_highlevel sbp2_highlevel = { |
Stefan Richter | ea42ea0 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 264 | .name = SBP2_DEVICE_NAME, |
| 265 | .host_reset = sbp2_host_reset, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | }; |
| 267 | |
| 268 | static struct hpsb_address_ops sbp2_ops = { |
Stefan Richter | ea42ea0 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 269 | .write = sbp2_handle_status_write |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | }; |
| 271 | |
| 272 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA |
Stefan Richter | ea42ea0 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 273 | static int sbp2_handle_physdma_write(struct hpsb_host *, int, int, quadlet_t *, |
| 274 | u64, size_t, u16); |
| 275 | static int sbp2_handle_physdma_read(struct hpsb_host *, int, quadlet_t *, u64, |
| 276 | size_t, u16); |
| 277 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | static struct hpsb_address_ops sbp2_physdma_ops = { |
Stefan Richter | ea42ea0 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 279 | .read = sbp2_handle_physdma_read, |
| 280 | .write = sbp2_handle_physdma_write, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | }; |
| 282 | #endif |
| 283 | |
Stefan Richter | ea42ea0 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 284 | |
| 285 | /* |
| 286 | * Interface to driver core and IEEE 1394 core |
| 287 | */ |
| 288 | static struct ieee1394_device_id sbp2_id_table[] = { |
| 289 | { |
| 290 | .match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION, |
| 291 | .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY & 0xffffff, |
| 292 | .version = SBP2_SW_VERSION_ENTRY & 0xffffff}, |
| 293 | {} |
| 294 | }; |
| 295 | MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table); |
| 296 | |
| 297 | static int sbp2_probe(struct device *); |
| 298 | static int sbp2_remove(struct device *); |
| 299 | static int sbp2_update(struct unit_directory *); |
| 300 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | static struct hpsb_protocol_driver sbp2_driver = { |
Ben Collins | ed30c26 | 2006-11-23 13:59:48 -0500 | [diff] [blame] | 302 | .name = SBP2_DEVICE_NAME, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | .id_table = sbp2_id_table, |
| 304 | .update = sbp2_update, |
| 305 | .driver = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | .probe = sbp2_probe, |
| 307 | .remove = sbp2_remove, |
| 308 | }, |
| 309 | }; |
| 310 | |
Stefan Richter | ea42ea0 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 311 | |
| 312 | /* |
| 313 | * Interface to SCSI core |
| 314 | */ |
| 315 | static int sbp2scsi_queuecommand(struct scsi_cmnd *, |
| 316 | void (*)(struct scsi_cmnd *)); |
| 317 | static int sbp2scsi_abort(struct scsi_cmnd *); |
| 318 | static int sbp2scsi_reset(struct scsi_cmnd *); |
| 319 | static int sbp2scsi_slave_alloc(struct scsi_device *); |
| 320 | static int sbp2scsi_slave_configure(struct scsi_device *); |
| 321 | static void sbp2scsi_slave_destroy(struct scsi_device *); |
| 322 | static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *, |
| 323 | struct device_attribute *, char *); |
| 324 | |
| 325 | static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL); |
| 326 | |
| 327 | static struct device_attribute *sbp2_sysfs_sdev_attrs[] = { |
| 328 | &dev_attr_ieee1394_id, |
| 329 | NULL |
| 330 | }; |
| 331 | |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 332 | static struct scsi_host_template sbp2_shost_template = { |
Stefan Richter | ea42ea0 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 333 | .module = THIS_MODULE, |
| 334 | .name = "SBP-2 IEEE-1394", |
| 335 | .proc_name = SBP2_DEVICE_NAME, |
| 336 | .queuecommand = sbp2scsi_queuecommand, |
| 337 | .eh_abort_handler = sbp2scsi_abort, |
| 338 | .eh_device_reset_handler = sbp2scsi_reset, |
| 339 | .slave_alloc = sbp2scsi_slave_alloc, |
| 340 | .slave_configure = sbp2scsi_slave_configure, |
| 341 | .slave_destroy = sbp2scsi_slave_destroy, |
| 342 | .this_id = -1, |
| 343 | .sg_tablesize = SG_ALL, |
| 344 | .use_clustering = ENABLE_CLUSTERING, |
| 345 | .cmd_per_lun = SBP2_MAX_CMDS, |
| 346 | .can_queue = SBP2_MAX_CMDS, |
Stefan Richter | ea42ea0 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 347 | .sdev_attrs = sbp2_sysfs_sdev_attrs, |
| 348 | }; |
| 349 | |
Stefan Richter | 4618fd3 | 2006-12-30 15:37:09 +0100 | [diff] [blame] | 350 | /* for match-all entries in sbp2_workarounds_table */ |
| 351 | #define SBP2_ROM_VALUE_WILDCARD 0x1000000 |
Stefan Richter | ea42ea0 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 352 | |
Stefan Richter | a80614d | 2006-02-14 22:04:19 -0500 | [diff] [blame] | 353 | /* |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 354 | * List of devices with known bugs. |
| 355 | * |
| 356 | * The firmware_revision field, masked with 0xffff00, is the best indicator |
| 357 | * for the type of bridge chip of a device. It yields a few false positives |
| 358 | * but this did not break correctly behaving devices so far. |
Stefan Richter | a80614d | 2006-02-14 22:04:19 -0500 | [diff] [blame] | 359 | */ |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 360 | static const struct { |
| 361 | u32 firmware_revision; |
Stefan Richter | e9a1c52 | 2006-05-15 22:06:37 +0200 | [diff] [blame] | 362 | u32 model_id; |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 363 | unsigned workarounds; |
| 364 | } sbp2_workarounds_table[] = { |
Ben Collins | 4b9a334 | 2006-06-12 18:10:18 -0400 | [diff] [blame] | 365 | /* DViCO Momobay CX-1 with TSB42AA9 bridge */ { |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 366 | .firmware_revision = 0x002800, |
Ben Collins | 4b9a334 | 2006-06-12 18:10:18 -0400 | [diff] [blame] | 367 | .model_id = 0x001010, |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 368 | .workarounds = SBP2_WORKAROUND_INQUIRY_36 | |
Stefan Richter | 3719122 | 2008-05-11 00:35:55 +0200 | [diff] [blame] | 369 | SBP2_WORKAROUND_MODE_SENSE_8 | |
| 370 | SBP2_WORKAROUND_POWER_CONDITION, |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 371 | }, |
Stefan Richter | d94a983 | 2008-02-03 23:07:44 +0100 | [diff] [blame] | 372 | /* DViCO Momobay FX-3A with TSB42AA9A bridge */ { |
| 373 | .firmware_revision = 0x002800, |
| 374 | .model_id = 0x000000, |
Stefan Richter | 3719122 | 2008-05-11 00:35:55 +0200 | [diff] [blame] | 375 | .workarounds = SBP2_WORKAROUND_DELAY_INQUIRY | |
| 376 | SBP2_WORKAROUND_POWER_CONDITION, |
Stefan Richter | d94a983 | 2008-02-03 23:07:44 +0100 | [diff] [blame] | 377 | }, |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 378 | /* Initio bridges, actually only needed for some older ones */ { |
| 379 | .firmware_revision = 0x000200, |
Stefan Richter | 4618fd3 | 2006-12-30 15:37:09 +0100 | [diff] [blame] | 380 | .model_id = SBP2_ROM_VALUE_WILDCARD, |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 381 | .workarounds = SBP2_WORKAROUND_INQUIRY_36, |
| 382 | }, |
Stefan Richter | 3719122 | 2008-05-11 00:35:55 +0200 | [diff] [blame] | 383 | /* PL-3507 bridge with Prolific firmware */ { |
| 384 | .firmware_revision = 0x012800, |
| 385 | .model_id = SBP2_ROM_VALUE_WILDCARD, |
| 386 | .workarounds = SBP2_WORKAROUND_POWER_CONDITION, |
| 387 | }, |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 388 | /* Symbios bridge */ { |
| 389 | .firmware_revision = 0xa0b800, |
Stefan Richter | 4618fd3 | 2006-12-30 15:37:09 +0100 | [diff] [blame] | 390 | .model_id = SBP2_ROM_VALUE_WILDCARD, |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 391 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS, |
Stefan Richter | e9a1c52 | 2006-05-15 22:06:37 +0200 | [diff] [blame] | 392 | }, |
Stefan Richter | 6e45ef4 | 2008-03-11 22:32:52 +0100 | [diff] [blame] | 393 | /* Datafab MD2-FW2 with Symbios/LSILogic SYM13FW500 bridge */ { |
| 394 | .firmware_revision = 0x002600, |
| 395 | .model_id = SBP2_ROM_VALUE_WILDCARD, |
| 396 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS, |
| 397 | }, |
Stefan Richter | e9a1c52 | 2006-05-15 22:06:37 +0200 | [diff] [blame] | 398 | /* iPod 4th generation */ { |
| 399 | .firmware_revision = 0x0a2700, |
| 400 | .model_id = 0x000021, |
| 401 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, |
| 402 | }, |
| 403 | /* iPod mini */ { |
| 404 | .firmware_revision = 0x0a2700, |
| 405 | .model_id = 0x000023, |
| 406 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, |
| 407 | }, |
| 408 | /* iPod Photo */ { |
| 409 | .firmware_revision = 0x0a2700, |
| 410 | .model_id = 0x00007e, |
| 411 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 412 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | }; |
| 414 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | /************************************** |
| 416 | * General utility functions |
| 417 | **************************************/ |
| 418 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | #ifndef __BIG_ENDIAN |
| 420 | /* |
| 421 | * Converts a buffer from be32 to cpu byte ordering. Length is in bytes. |
| 422 | */ |
Stefan Richter | 2b01b80 | 2006-07-03 12:02:28 -0400 | [diff] [blame] | 423 | static inline void sbp2util_be32_to_cpu_buffer(void *buffer, int length) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | { |
| 425 | u32 *temp = buffer; |
| 426 | |
| 427 | for (length = (length >> 2); length--; ) |
| 428 | temp[length] = be32_to_cpu(temp[length]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | } |
| 430 | |
| 431 | /* |
| 432 | * Converts a buffer from cpu to be32 byte ordering. Length is in bytes. |
| 433 | */ |
Stefan Richter | 2b01b80 | 2006-07-03 12:02:28 -0400 | [diff] [blame] | 434 | static inline void sbp2util_cpu_to_be32_buffer(void *buffer, int length) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | { |
| 436 | u32 *temp = buffer; |
| 437 | |
| 438 | for (length = (length >> 2); length--; ) |
| 439 | temp[length] = cpu_to_be32(temp[length]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | } |
| 441 | #else /* BIG_ENDIAN */ |
| 442 | /* Why waste the cpu cycles? */ |
Stefan Richter | 611aa19 | 2006-08-02 18:44:00 +0200 | [diff] [blame] | 443 | #define sbp2util_be32_to_cpu_buffer(x,y) do {} while (0) |
| 444 | #define sbp2util_cpu_to_be32_buffer(x,y) do {} while (0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | #endif |
| 446 | |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 447 | static DECLARE_WAIT_QUEUE_HEAD(sbp2_access_wq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | |
Stefan Richter | e8398bb | 2006-07-23 22:19:00 +0200 | [diff] [blame] | 449 | /* |
| 450 | * Waits for completion of an SBP-2 access request. |
| 451 | * Returns nonzero if timed out or prematurely interrupted. |
| 452 | */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 453 | static int sbp2util_access_timeout(struct sbp2_lu *lu, int timeout) |
Stefan Richter | e8398bb | 2006-07-23 22:19:00 +0200 | [diff] [blame] | 454 | { |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 455 | long leftover; |
Stefan Richter | e8398bb | 2006-07-23 22:19:00 +0200 | [diff] [blame] | 456 | |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 457 | leftover = wait_event_interruptible_timeout( |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 458 | sbp2_access_wq, lu->access_complete, timeout); |
| 459 | lu->access_complete = 0; |
Stefan Richter | e8398bb | 2006-07-23 22:19:00 +0200 | [diff] [blame] | 460 | return leftover <= 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | } |
| 462 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 463 | static void sbp2_free_packet(void *packet) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | { |
| 465 | hpsb_free_tlabel(packet); |
| 466 | hpsb_free_packet(packet); |
| 467 | } |
| 468 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 469 | /* |
| 470 | * This is much like hpsb_node_write(), except it ignores the response |
| 471 | * subaction and returns immediately. Can be used from atomic context. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | */ |
| 473 | static int sbp2util_node_write_no_wait(struct node_entry *ne, u64 addr, |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 474 | quadlet_t *buf, size_t len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | { |
| 476 | struct hpsb_packet *packet; |
| 477 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 478 | packet = hpsb_make_writepacket(ne->host, ne->nodeid, addr, buf, len); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 479 | if (!packet) |
| 480 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 482 | hpsb_set_packet_complete_task(packet, sbp2_free_packet, packet); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 483 | hpsb_node_fill_packet(ne, packet); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 484 | if (hpsb_send_packet(packet) < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | sbp2_free_packet(packet); |
| 486 | return -EIO; |
| 487 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | return 0; |
| 489 | } |
| 490 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 491 | static void sbp2util_notify_fetch_agent(struct sbp2_lu *lu, u64 offset, |
| 492 | quadlet_t *data, size_t len) |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 493 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 494 | /* There is a small window after a bus reset within which the node |
| 495 | * entry's generation is current but the reconnect wasn't completed. */ |
| 496 | if (unlikely(atomic_read(&lu->state) == SBP2LU_STATE_IN_RESET)) |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 497 | return; |
| 498 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 499 | if (hpsb_node_write(lu->ne, lu->command_block_agent_addr + offset, |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 500 | data, len)) |
| 501 | SBP2_ERR("sbp2util_notify_fetch_agent failed."); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 502 | |
| 503 | /* Now accept new SCSI commands, unless a bus reset happended during |
| 504 | * hpsb_node_write. */ |
| 505 | if (likely(atomic_read(&lu->state) != SBP2LU_STATE_IN_RESET)) |
| 506 | scsi_unblock_requests(lu->shost); |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 507 | } |
| 508 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 509 | static void sbp2util_write_orb_pointer(struct work_struct *work) |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 510 | { |
Stefan Richter | ec9b7e1 | 2006-12-07 23:23:25 +0100 | [diff] [blame] | 511 | struct sbp2_lu *lu = container_of(work, struct sbp2_lu, protocol_work); |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 512 | quadlet_t data[2]; |
| 513 | |
Stefan Richter | ec9b7e1 | 2006-12-07 23:23:25 +0100 | [diff] [blame] | 514 | data[0] = ORB_SET_NODE_ID(lu->hi->host->node_id); |
| 515 | data[1] = lu->last_orb_dma; |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 516 | sbp2util_cpu_to_be32_buffer(data, 8); |
Stefan Richter | ec9b7e1 | 2006-12-07 23:23:25 +0100 | [diff] [blame] | 517 | sbp2util_notify_fetch_agent(lu, SBP2_ORB_POINTER_OFFSET, data, 8); |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 518 | } |
| 519 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 520 | static void sbp2util_write_doorbell(struct work_struct *work) |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 521 | { |
Stefan Richter | ec9b7e1 | 2006-12-07 23:23:25 +0100 | [diff] [blame] | 522 | struct sbp2_lu *lu = container_of(work, struct sbp2_lu, protocol_work); |
| 523 | |
| 524 | sbp2util_notify_fetch_agent(lu, SBP2_DOORBELL_OFFSET, NULL, 4); |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 525 | } |
| 526 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 527 | static int sbp2util_create_command_orb_pool(struct sbp2_lu *lu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 529 | struct sbp2_command_info *cmd; |
Stefan Richter | cd8c79f | 2008-08-09 20:16:24 +0200 | [diff] [blame] | 530 | struct device *dmadev = lu->hi->host->device.parent; |
Stefan Richter | 3d269cb | 2007-02-04 20:57:38 +0100 | [diff] [blame] | 531 | int i, orbs = sbp2_serialize_io ? 2 : SBP2_MAX_CMDS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | for (i = 0; i < orbs; i++) { |
Stefan Richter | 3d269cb | 2007-02-04 20:57:38 +0100 | [diff] [blame] | 534 | cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); |
| 535 | if (!cmd) |
Stefan Richter | cd8c79f | 2008-08-09 20:16:24 +0200 | [diff] [blame] | 536 | goto failed_alloc; |
| 537 | |
| 538 | cmd->command_orb_dma = |
| 539 | dma_map_single(dmadev, &cmd->command_orb, |
| 540 | sizeof(struct sbp2_command_orb), |
| 541 | DMA_TO_DEVICE); |
| 542 | if (dma_mapping_error(dmadev, cmd->command_orb_dma)) |
| 543 | goto failed_orb; |
| 544 | |
| 545 | cmd->sge_dma = |
| 546 | dma_map_single(dmadev, &cmd->scatter_gather_element, |
| 547 | sizeof(cmd->scatter_gather_element), |
| 548 | DMA_TO_DEVICE); |
| 549 | if (dma_mapping_error(dmadev, cmd->sge_dma)) |
| 550 | goto failed_sge; |
| 551 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 552 | INIT_LIST_HEAD(&cmd->list); |
| 553 | list_add_tail(&cmd->list, &lu->cmd_orb_completed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | return 0; |
Stefan Richter | cd8c79f | 2008-08-09 20:16:24 +0200 | [diff] [blame] | 556 | |
| 557 | failed_sge: |
| 558 | dma_unmap_single(dmadev, cmd->command_orb_dma, |
| 559 | sizeof(struct sbp2_command_orb), DMA_TO_DEVICE); |
| 560 | failed_orb: |
| 561 | kfree(cmd); |
| 562 | failed_alloc: |
| 563 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | } |
| 565 | |
Stefan Richter | a2ee3f9 | 2007-08-11 11:51:16 +0200 | [diff] [blame] | 566 | static void sbp2util_remove_command_orb_pool(struct sbp2_lu *lu, |
| 567 | struct hpsb_host *host) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | struct list_head *lh, *next; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 570 | struct sbp2_command_info *cmd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | unsigned long flags; |
| 572 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 573 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
| 574 | if (!list_empty(&lu->cmd_orb_completed)) |
| 575 | list_for_each_safe(lh, next, &lu->cmd_orb_completed) { |
| 576 | cmd = list_entry(lh, struct sbp2_command_info, list); |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 577 | dma_unmap_single(host->device.parent, |
| 578 | cmd->command_orb_dma, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | sizeof(struct sbp2_command_orb), |
Stefan Richter | 9b7d9c0 | 2006-11-22 21:44:34 +0100 | [diff] [blame] | 580 | DMA_TO_DEVICE); |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 581 | dma_unmap_single(host->device.parent, cmd->sge_dma, |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 582 | sizeof(cmd->scatter_gather_element), |
Stefan Richter | 2446a79 | 2007-02-04 20:54:57 +0100 | [diff] [blame] | 583 | DMA_TO_DEVICE); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 584 | kfree(cmd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | } |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 586 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | return; |
| 588 | } |
| 589 | |
| 590 | /* |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 591 | * Finds the sbp2_command for a given outstanding command ORB. |
| 592 | * Only looks at the in-use list. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | */ |
| 594 | static struct sbp2_command_info *sbp2util_find_command_for_orb( |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 595 | struct sbp2_lu *lu, dma_addr_t orb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 597 | struct sbp2_command_info *cmd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | unsigned long flags; |
| 599 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 600 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
| 601 | if (!list_empty(&lu->cmd_orb_inuse)) |
| 602 | list_for_each_entry(cmd, &lu->cmd_orb_inuse, list) |
| 603 | if (cmd->command_orb_dma == orb) { |
| 604 | spin_unlock_irqrestore( |
| 605 | &lu->cmd_orb_lock, flags); |
| 606 | return cmd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | } |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 608 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 609 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | } |
| 611 | |
| 612 | /* |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 613 | * Finds the sbp2_command for a given outstanding SCpnt. |
| 614 | * Only looks at the in-use list. |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 615 | * Must be called with lu->cmd_orb_lock held. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | */ |
Stefan Richter | 24c7cd0 | 2006-04-01 21:11:41 +0200 | [diff] [blame] | 617 | static struct sbp2_command_info *sbp2util_find_command_for_SCpnt( |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 618 | struct sbp2_lu *lu, void *SCpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 620 | struct sbp2_command_info *cmd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 621 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 622 | if (!list_empty(&lu->cmd_orb_inuse)) |
| 623 | list_for_each_entry(cmd, &lu->cmd_orb_inuse, list) |
| 624 | if (cmd->Current_SCpnt == SCpnt) |
| 625 | return cmd; |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 626 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | } |
| 628 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | static struct sbp2_command_info *sbp2util_allocate_command_orb( |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 630 | struct sbp2_lu *lu, |
| 631 | struct scsi_cmnd *Current_SCpnt, |
| 632 | void (*Current_done)(struct scsi_cmnd *)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 633 | { |
| 634 | struct list_head *lh; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 635 | struct sbp2_command_info *cmd = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 636 | unsigned long flags; |
| 637 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 638 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
| 639 | if (!list_empty(&lu->cmd_orb_completed)) { |
| 640 | lh = lu->cmd_orb_completed.next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | list_del(lh); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 642 | cmd = list_entry(lh, struct sbp2_command_info, list); |
| 643 | cmd->Current_done = Current_done; |
| 644 | cmd->Current_SCpnt = Current_SCpnt; |
| 645 | list_add_tail(&cmd->list, &lu->cmd_orb_inuse); |
| 646 | } else |
Harvey Harrison | b1ce1fd | 2008-03-05 18:24:54 -0800 | [diff] [blame] | 647 | SBP2_ERR("%s: no orbs available", __func__); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 648 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); |
| 649 | return cmd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 650 | } |
| 651 | |
Stefan Richter | 58272c1 | 2006-11-04 09:55:33 +0100 | [diff] [blame] | 652 | /* |
| 653 | * Unmaps the DMAs of a command and moves the command to the completed ORB list. |
| 654 | * Must be called with lu->cmd_orb_lock held. |
| 655 | */ |
| 656 | static void sbp2util_mark_command_completed(struct sbp2_lu *lu, |
| 657 | struct sbp2_command_info *cmd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | { |
Stefan Richter | ed6ffd0 | 2008-08-14 09:28:14 +0200 | [diff] [blame] | 659 | if (scsi_sg_count(cmd->Current_SCpnt)) |
| 660 | dma_unmap_sg(lu->ud->ne->host->device.parent, |
| 661 | scsi_sglist(cmd->Current_SCpnt), |
| 662 | scsi_sg_count(cmd->Current_SCpnt), |
| 663 | cmd->Current_SCpnt->sc_data_direction); |
Stefan Richter | cd641f6 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 664 | list_move_tail(&cmd->list, &lu->cmd_orb_completed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | } |
| 666 | |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 667 | /* |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 668 | * Is lu valid? Is the 1394 node still present? |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 669 | */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 670 | static inline int sbp2util_node_is_available(struct sbp2_lu *lu) |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 671 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 672 | return lu && lu->ne && !lu->ne->in_limbo; |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 673 | } |
| 674 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | /********************************************* |
| 676 | * IEEE-1394 core driver stack related section |
| 677 | *********************************************/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 678 | |
| 679 | static int sbp2_probe(struct device *dev) |
| 680 | { |
| 681 | struct unit_directory *ud; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 682 | struct sbp2_lu *lu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 683 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 684 | ud = container_of(dev, struct unit_directory, device); |
| 685 | |
| 686 | /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s) |
| 687 | * instead. */ |
| 688 | if (ud->flags & UNIT_DIRECTORY_HAS_LUN_DIRECTORY) |
| 689 | return -ENODEV; |
| 690 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 691 | lu = sbp2_alloc_device(ud); |
| 692 | if (!lu) |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 693 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 695 | sbp2_parse_unit_directory(lu, ud); |
| 696 | return sbp2_start_device(lu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 697 | } |
| 698 | |
| 699 | static int sbp2_remove(struct device *dev) |
| 700 | { |
| 701 | struct unit_directory *ud; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 702 | struct sbp2_lu *lu; |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 703 | struct scsi_device *sdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 704 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 705 | ud = container_of(dev, struct unit_directory, device); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 706 | lu = ud->device.driver_data; |
| 707 | if (!lu) |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 708 | return 0; |
| 709 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 710 | if (lu->shost) { |
Stefan Richter | bf637ec | 2006-01-31 00:13:06 -0500 | [diff] [blame] | 711 | /* Get rid of enqueued commands if there is no chance to |
| 712 | * send them. */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 713 | if (!sbp2util_node_is_available(lu)) |
| 714 | sbp2scsi_complete_all_commands(lu, DID_NO_CONNECT); |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 715 | /* scsi_remove_device() may trigger shutdown functions of SCSI |
Stefan Richter | bf637ec | 2006-01-31 00:13:06 -0500 | [diff] [blame] | 716 | * highlevel drivers which would deadlock if blocked. */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 717 | atomic_set(&lu->state, SBP2LU_STATE_IN_SHUTDOWN); |
| 718 | scsi_unblock_requests(lu->shost); |
Stefan Richter | bf637ec | 2006-01-31 00:13:06 -0500 | [diff] [blame] | 719 | } |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 720 | sdev = lu->sdev; |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 721 | if (sdev) { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 722 | lu->sdev = NULL; |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 723 | scsi_remove_device(sdev); |
| 724 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 725 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 726 | sbp2_logout_device(lu); |
| 727 | sbp2_remove_device(lu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 728 | |
| 729 | return 0; |
| 730 | } |
| 731 | |
| 732 | static int sbp2_update(struct unit_directory *ud) |
| 733 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 734 | struct sbp2_lu *lu = ud->device.driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 735 | |
Stefan Richter | a338406 | 2008-08-16 13:39:26 +0200 | [diff] [blame] | 736 | if (sbp2_reconnect_device(lu) != 0) { |
| 737 | /* |
| 738 | * Reconnect failed. If another bus reset happened, |
| 739 | * let nodemgr proceed and call sbp2_update again later |
| 740 | * (or sbp2_remove if this node went away). |
| 741 | */ |
| 742 | if (!hpsb_node_entry_valid(lu->ne)) |
| 743 | return 0; |
| 744 | /* |
| 745 | * Or the target rejected the reconnect because we weren't |
| 746 | * fast enough. Try a regular login, but first log out |
| 747 | * just in case of any weirdness. |
| 748 | */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 749 | sbp2_logout_device(lu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | |
Stefan Richter | a338406 | 2008-08-16 13:39:26 +0200 | [diff] [blame] | 751 | if (sbp2_login_device(lu) != 0) { |
| 752 | if (!hpsb_node_entry_valid(lu->ne)) |
| 753 | return 0; |
| 754 | |
| 755 | /* Maybe another initiator won the login. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 756 | SBP2_ERR("Failed to reconnect to sbp2 device!"); |
| 757 | return -EBUSY; |
| 758 | } |
| 759 | } |
| 760 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 761 | sbp2_set_busy_timeout(lu); |
| 762 | sbp2_agent_reset(lu, 1); |
| 763 | sbp2_max_speed_and_size(lu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 764 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 765 | /* Complete any pending commands with busy (so they get retried) |
| 766 | * and remove them from our queue. */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 767 | sbp2scsi_complete_all_commands(lu, DID_BUS_BUSY); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | |
Stefan Richter | 4fc383c | 2006-08-14 18:46:00 +0200 | [diff] [blame] | 769 | /* Accept new commands unless there was another bus reset in the |
| 770 | * meantime. */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 771 | if (hpsb_node_entry_valid(lu->ne)) { |
| 772 | atomic_set(&lu->state, SBP2LU_STATE_RUNNING); |
| 773 | scsi_unblock_requests(lu->shost); |
Stefan Richter | 4fc383c | 2006-08-14 18:46:00 +0200 | [diff] [blame] | 774 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 775 | return 0; |
| 776 | } |
| 777 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 778 | static struct sbp2_lu *sbp2_alloc_device(struct unit_directory *ud) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | { |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 780 | struct sbp2_fwhost_info *hi; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 781 | struct Scsi_Host *shost = NULL; |
| 782 | struct sbp2_lu *lu = NULL; |
Stefan Richter | 261b5f6 | 2007-08-11 11:52:08 +0200 | [diff] [blame] | 783 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 785 | lu = kzalloc(sizeof(*lu), GFP_KERNEL); |
| 786 | if (!lu) { |
| 787 | SBP2_ERR("failed to create lu"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 788 | goto failed_alloc; |
| 789 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 790 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 791 | lu->ne = ud->ne; |
| 792 | lu->ud = ud; |
| 793 | lu->speed_code = IEEE1394_SPEED_100; |
| 794 | lu->max_payload_size = sbp2_speedto_max_payload[IEEE1394_SPEED_100]; |
| 795 | lu->status_fifo_addr = CSR1212_INVALID_ADDR_SPACE; |
| 796 | INIT_LIST_HEAD(&lu->cmd_orb_inuse); |
| 797 | INIT_LIST_HEAD(&lu->cmd_orb_completed); |
| 798 | INIT_LIST_HEAD(&lu->lu_list); |
| 799 | spin_lock_init(&lu->cmd_orb_lock); |
| 800 | atomic_set(&lu->state, SBP2LU_STATE_RUNNING); |
| 801 | INIT_WORK(&lu->protocol_work, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 802 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 803 | ud->device.driver_data = lu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | |
| 805 | hi = hpsb_get_hostinfo(&sbp2_highlevel, ud->ne->host); |
| 806 | if (!hi) { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 807 | hi = hpsb_create_hostinfo(&sbp2_highlevel, ud->ne->host, |
| 808 | sizeof(*hi)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | if (!hi) { |
| 810 | SBP2_ERR("failed to allocate hostinfo"); |
| 811 | goto failed_alloc; |
| 812 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 813 | hi->host = ud->ne->host; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 814 | INIT_LIST_HEAD(&hi->logical_units); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 815 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA |
| 817 | /* Handle data movement if physical dma is not |
Stefan Richter | 5566405 | 2006-03-28 19:59:42 -0500 | [diff] [blame] | 818 | * enabled or not supported on host controller */ |
| 819 | if (!hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host, |
| 820 | &sbp2_physdma_ops, |
| 821 | 0x0ULL, 0xfffffffcULL)) { |
| 822 | SBP2_ERR("failed to register lower 4GB address range"); |
| 823 | goto failed_alloc; |
| 824 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 825 | #endif |
| 826 | } |
| 827 | |
Stefan Richter | ed6ffd0 | 2008-08-14 09:28:14 +0200 | [diff] [blame] | 828 | if (dma_get_max_seg_size(hi->host->device.parent) > SBP2_MAX_SEG_SIZE) |
| 829 | BUG_ON(dma_set_max_seg_size(hi->host->device.parent, |
| 830 | SBP2_MAX_SEG_SIZE)); |
| 831 | |
Stefan Richter | 147830f | 2006-03-28 19:54:52 -0500 | [diff] [blame] | 832 | /* Prevent unloading of the 1394 host */ |
| 833 | if (!try_module_get(hi->host->driver->owner)) { |
| 834 | SBP2_ERR("failed to get a reference on 1394 host driver"); |
| 835 | goto failed_alloc; |
| 836 | } |
| 837 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 838 | lu->hi = hi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 839 | |
Stefan Richter | 261b5f6 | 2007-08-11 11:52:08 +0200 | [diff] [blame] | 840 | write_lock_irqsave(&sbp2_hi_logical_units_lock, flags); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 841 | list_add_tail(&lu->lu_list, &hi->logical_units); |
Stefan Richter | 261b5f6 | 2007-08-11 11:52:08 +0200 | [diff] [blame] | 842 | write_unlock_irqrestore(&sbp2_hi_logical_units_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 843 | |
Stefan Richter | 35bdddb | 2006-01-31 00:13:33 -0500 | [diff] [blame] | 844 | /* Register the status FIFO address range. We could use the same FIFO |
| 845 | * for targets at different nodes. However we need different FIFOs per |
Stefan Richter | a54c9d3 | 2006-05-15 22:09:46 +0200 | [diff] [blame] | 846 | * target in order to support multi-unit devices. |
| 847 | * The FIFO is located out of the local host controller's physical range |
| 848 | * but, if possible, within the posted write area. Status writes will |
| 849 | * then be performed as unified transactions. This slightly reduces |
| 850 | * bandwidth usage, and some Prolific based devices seem to require it. |
| 851 | */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 852 | lu->status_fifo_addr = hpsb_allocate_and_register_addrspace( |
Stefan Richter | 35bdddb | 2006-01-31 00:13:33 -0500 | [diff] [blame] | 853 | &sbp2_highlevel, ud->ne->host, &sbp2_ops, |
| 854 | sizeof(struct sbp2_status_block), sizeof(quadlet_t), |
Ben Collins | 40ae6c5 | 2006-06-12 18:13:49 -0400 | [diff] [blame] | 855 | ud->ne->host->low_addr_space, CSR1212_ALL_SPACE_END); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 856 | if (lu->status_fifo_addr == CSR1212_INVALID_ADDR_SPACE) { |
Stefan Richter | 35bdddb | 2006-01-31 00:13:33 -0500 | [diff] [blame] | 857 | SBP2_ERR("failed to allocate status FIFO address range"); |
| 858 | goto failed_alloc; |
| 859 | } |
| 860 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 861 | shost = scsi_host_alloc(&sbp2_shost_template, sizeof(unsigned long)); |
| 862 | if (!shost) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 863 | SBP2_ERR("failed to register scsi host"); |
| 864 | goto failed_alloc; |
| 865 | } |
| 866 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 867 | shost->hostdata[0] = (unsigned long)lu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 869 | if (!scsi_add_host(shost, &ud->device)) { |
| 870 | lu->shost = shost; |
| 871 | return lu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | } |
| 873 | |
| 874 | SBP2_ERR("failed to add scsi host"); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 875 | scsi_host_put(shost); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 876 | |
| 877 | failed_alloc: |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 878 | sbp2_remove_device(lu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 879 | return NULL; |
| 880 | } |
| 881 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 882 | static void sbp2_host_reset(struct hpsb_host *host) |
| 883 | { |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 884 | struct sbp2_fwhost_info *hi; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 885 | struct sbp2_lu *lu; |
Stefan Richter | 261b5f6 | 2007-08-11 11:52:08 +0200 | [diff] [blame] | 886 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 887 | |
| 888 | hi = hpsb_get_hostinfo(&sbp2_highlevel, host); |
Stefan Richter | 2cccbb5 | 2006-08-14 18:59:00 +0200 | [diff] [blame] | 889 | if (!hi) |
| 890 | return; |
Stefan Richter | 261b5f6 | 2007-08-11 11:52:08 +0200 | [diff] [blame] | 891 | |
| 892 | read_lock_irqsave(&sbp2_hi_logical_units_lock, flags); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 893 | list_for_each_entry(lu, &hi->logical_units, lu_list) |
| 894 | if (likely(atomic_read(&lu->state) != |
Stefan Richter | 2cccbb5 | 2006-08-14 18:59:00 +0200 | [diff] [blame] | 895 | SBP2LU_STATE_IN_SHUTDOWN)) { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 896 | atomic_set(&lu->state, SBP2LU_STATE_IN_RESET); |
| 897 | scsi_block_requests(lu->shost); |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 898 | } |
Stefan Richter | 261b5f6 | 2007-08-11 11:52:08 +0200 | [diff] [blame] | 899 | read_unlock_irqrestore(&sbp2_hi_logical_units_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 900 | } |
| 901 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 902 | static int sbp2_start_device(struct sbp2_lu *lu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 903 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 904 | struct sbp2_fwhost_info *hi = lu->hi; |
James Bottomley | 146f726 | 2005-09-10 12:44:09 -0500 | [diff] [blame] | 905 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 906 | |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 907 | lu->login_response = dma_alloc_coherent(hi->host->device.parent, |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 908 | sizeof(struct sbp2_login_response), |
Stefan Richter | 9b7d9c0 | 2006-11-22 21:44:34 +0100 | [diff] [blame] | 909 | &lu->login_response_dma, GFP_KERNEL); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 910 | if (!lu->login_response) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 911 | goto alloc_fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 912 | |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 913 | lu->query_logins_orb = dma_alloc_coherent(hi->host->device.parent, |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 914 | sizeof(struct sbp2_query_logins_orb), |
Stefan Richter | 9b7d9c0 | 2006-11-22 21:44:34 +0100 | [diff] [blame] | 915 | &lu->query_logins_orb_dma, GFP_KERNEL); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 916 | if (!lu->query_logins_orb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 917 | goto alloc_fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 919 | lu->query_logins_response = dma_alloc_coherent(hi->host->device.parent, |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 920 | sizeof(struct sbp2_query_logins_response), |
Stefan Richter | 9b7d9c0 | 2006-11-22 21:44:34 +0100 | [diff] [blame] | 921 | &lu->query_logins_response_dma, GFP_KERNEL); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 922 | if (!lu->query_logins_response) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 923 | goto alloc_fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 924 | |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 925 | lu->reconnect_orb = dma_alloc_coherent(hi->host->device.parent, |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 926 | sizeof(struct sbp2_reconnect_orb), |
Stefan Richter | 9b7d9c0 | 2006-11-22 21:44:34 +0100 | [diff] [blame] | 927 | &lu->reconnect_orb_dma, GFP_KERNEL); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 928 | if (!lu->reconnect_orb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | goto alloc_fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 930 | |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 931 | lu->logout_orb = dma_alloc_coherent(hi->host->device.parent, |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 932 | sizeof(struct sbp2_logout_orb), |
Stefan Richter | 9b7d9c0 | 2006-11-22 21:44:34 +0100 | [diff] [blame] | 933 | &lu->logout_orb_dma, GFP_KERNEL); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 934 | if (!lu->logout_orb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 935 | goto alloc_fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 936 | |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 937 | lu->login_orb = dma_alloc_coherent(hi->host->device.parent, |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 938 | sizeof(struct sbp2_login_orb), |
Stefan Richter | 9b7d9c0 | 2006-11-22 21:44:34 +0100 | [diff] [blame] | 939 | &lu->login_orb_dma, GFP_KERNEL); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 940 | if (!lu->login_orb) |
Stefan Richter | eaceec7 | 2005-12-13 11:05:05 -0500 | [diff] [blame] | 941 | goto alloc_fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 942 | |
Stefan Richter | 3d269cb | 2007-02-04 20:57:38 +0100 | [diff] [blame] | 943 | if (sbp2util_create_command_orb_pool(lu)) |
| 944 | goto alloc_fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 946 | /* Wait a second before trying to log in. Previously logged in |
| 947 | * initiators need a chance to reconnect. */ |
Stefan Richter | 902abed | 2006-08-14 18:56:00 +0200 | [diff] [blame] | 948 | if (msleep_interruptible(1000)) { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 949 | sbp2_remove_device(lu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 950 | return -EINTR; |
| 951 | } |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 952 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 953 | if (sbp2_login_device(lu)) { |
| 954 | sbp2_remove_device(lu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 955 | return -EBUSY; |
| 956 | } |
| 957 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 958 | sbp2_set_busy_timeout(lu); |
| 959 | sbp2_agent_reset(lu, 1); |
| 960 | sbp2_max_speed_and_size(lu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 961 | |
Stefan Richter | d94a983 | 2008-02-03 23:07:44 +0100 | [diff] [blame] | 962 | if (lu->workarounds & SBP2_WORKAROUND_DELAY_INQUIRY) |
| 963 | ssleep(SBP2_INQUIRY_DELAY); |
| 964 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 965 | error = scsi_add_device(lu->shost, 0, lu->ud->id, 0); |
James Bottomley | 146f726 | 2005-09-10 12:44:09 -0500 | [diff] [blame] | 966 | if (error) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | SBP2_ERR("scsi_add_device failed"); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 968 | sbp2_logout_device(lu); |
| 969 | sbp2_remove_device(lu); |
James Bottomley | 146f726 | 2005-09-10 12:44:09 -0500 | [diff] [blame] | 970 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 971 | } |
| 972 | |
| 973 | return 0; |
Stefan Richter | eaceec7 | 2005-12-13 11:05:05 -0500 | [diff] [blame] | 974 | |
| 975 | alloc_fail: |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 976 | SBP2_ERR("Could not allocate memory for lu"); |
| 977 | sbp2_remove_device(lu); |
Stefan Richter | eaceec7 | 2005-12-13 11:05:05 -0500 | [diff] [blame] | 978 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 979 | } |
| 980 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 981 | static void sbp2_remove_device(struct sbp2_lu *lu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 982 | { |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 983 | struct sbp2_fwhost_info *hi; |
Stefan Richter | 261b5f6 | 2007-08-11 11:52:08 +0200 | [diff] [blame] | 984 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 985 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 986 | if (!lu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 987 | return; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 988 | hi = lu->hi; |
Stefan Richter | a2ee3f9 | 2007-08-11 11:51:16 +0200 | [diff] [blame] | 989 | if (!hi) |
| 990 | goto no_hi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 991 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 992 | if (lu->shost) { |
| 993 | scsi_remove_host(lu->shost); |
| 994 | scsi_host_put(lu->shost); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 995 | } |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 996 | flush_scheduled_work(); |
Stefan Richter | a2ee3f9 | 2007-08-11 11:51:16 +0200 | [diff] [blame] | 997 | sbp2util_remove_command_orb_pool(lu, hi->host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 998 | |
Stefan Richter | 261b5f6 | 2007-08-11 11:52:08 +0200 | [diff] [blame] | 999 | write_lock_irqsave(&sbp2_hi_logical_units_lock, flags); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1000 | list_del(&lu->lu_list); |
Stefan Richter | 261b5f6 | 2007-08-11 11:52:08 +0200 | [diff] [blame] | 1001 | write_unlock_irqrestore(&sbp2_hi_logical_units_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1002 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1003 | if (lu->login_response) |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 1004 | dma_free_coherent(hi->host->device.parent, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1005 | sizeof(struct sbp2_login_response), |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1006 | lu->login_response, |
| 1007 | lu->login_response_dma); |
| 1008 | if (lu->login_orb) |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 1009 | dma_free_coherent(hi->host->device.parent, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1010 | sizeof(struct sbp2_login_orb), |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1011 | lu->login_orb, |
| 1012 | lu->login_orb_dma); |
| 1013 | if (lu->reconnect_orb) |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 1014 | dma_free_coherent(hi->host->device.parent, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1015 | sizeof(struct sbp2_reconnect_orb), |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1016 | lu->reconnect_orb, |
| 1017 | lu->reconnect_orb_dma); |
| 1018 | if (lu->logout_orb) |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 1019 | dma_free_coherent(hi->host->device.parent, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | sizeof(struct sbp2_logout_orb), |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1021 | lu->logout_orb, |
| 1022 | lu->logout_orb_dma); |
| 1023 | if (lu->query_logins_orb) |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 1024 | dma_free_coherent(hi->host->device.parent, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1025 | sizeof(struct sbp2_query_logins_orb), |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1026 | lu->query_logins_orb, |
| 1027 | lu->query_logins_orb_dma); |
| 1028 | if (lu->query_logins_response) |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 1029 | dma_free_coherent(hi->host->device.parent, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1030 | sizeof(struct sbp2_query_logins_response), |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1031 | lu->query_logins_response, |
| 1032 | lu->query_logins_response_dma); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1033 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1034 | if (lu->status_fifo_addr != CSR1212_INVALID_ADDR_SPACE) |
Stefan Richter | 35bdddb | 2006-01-31 00:13:33 -0500 | [diff] [blame] | 1035 | hpsb_unregister_addrspace(&sbp2_highlevel, hi->host, |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1036 | lu->status_fifo_addr); |
Stefan Richter | 35bdddb | 2006-01-31 00:13:33 -0500 | [diff] [blame] | 1037 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1038 | lu->ud->device.driver_data = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1039 | |
Stefan Richter | a2ee3f9 | 2007-08-11 11:51:16 +0200 | [diff] [blame] | 1040 | module_put(hi->host->driver->owner); |
| 1041 | no_hi: |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1042 | kfree(lu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1043 | } |
| 1044 | |
| 1045 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA |
| 1046 | /* |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1047 | * Deal with write requests on adapters which do not support physical DMA or |
| 1048 | * have it switched off. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1049 | */ |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1050 | static int sbp2_handle_physdma_write(struct hpsb_host *host, int nodeid, |
| 1051 | int destid, quadlet_t *data, u64 addr, |
| 1052 | size_t length, u16 flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1053 | { |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1054 | memcpy(bus_to_virt((u32) addr), data, length); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1055 | return RCODE_COMPLETE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1056 | } |
| 1057 | |
| 1058 | /* |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1059 | * Deal with read requests on adapters which do not support physical DMA or |
| 1060 | * have it switched off. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1061 | */ |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1062 | static int sbp2_handle_physdma_read(struct hpsb_host *host, int nodeid, |
| 1063 | quadlet_t *data, u64 addr, size_t length, |
| 1064 | u16 flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1065 | { |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1066 | memcpy(data, bus_to_virt((u32) addr), length); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1067 | return RCODE_COMPLETE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1068 | } |
| 1069 | #endif |
| 1070 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1071 | /************************************** |
| 1072 | * SBP-2 protocol related section |
| 1073 | **************************************/ |
| 1074 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1075 | static int sbp2_query_logins(struct sbp2_lu *lu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1076 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1077 | struct sbp2_fwhost_info *hi = lu->hi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1078 | quadlet_t data[2]; |
| 1079 | int max_logins; |
| 1080 | int active_logins; |
| 1081 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1082 | lu->query_logins_orb->reserved1 = 0x0; |
| 1083 | lu->query_logins_orb->reserved2 = 0x0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1084 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1085 | lu->query_logins_orb->query_response_lo = lu->query_logins_response_dma; |
| 1086 | lu->query_logins_orb->query_response_hi = |
| 1087 | ORB_SET_NODE_ID(hi->host->node_id); |
| 1088 | lu->query_logins_orb->lun_misc = |
| 1089 | ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST); |
| 1090 | lu->query_logins_orb->lun_misc |= ORB_SET_NOTIFY(1); |
| 1091 | lu->query_logins_orb->lun_misc |= ORB_SET_LUN(lu->lun); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1092 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1093 | lu->query_logins_orb->reserved_resp_length = |
| 1094 | ORB_SET_QUERY_LOGINS_RESP_LENGTH( |
| 1095 | sizeof(struct sbp2_query_logins_response)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1096 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1097 | lu->query_logins_orb->status_fifo_hi = |
| 1098 | ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id); |
| 1099 | lu->query_logins_orb->status_fifo_lo = |
| 1100 | ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1101 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1102 | sbp2util_cpu_to_be32_buffer(lu->query_logins_orb, |
| 1103 | sizeof(struct sbp2_query_logins_orb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1104 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1105 | memset(lu->query_logins_response, 0, |
| 1106 | sizeof(struct sbp2_query_logins_response)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1107 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1108 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1109 | data[1] = lu->query_logins_orb_dma; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1110 | sbp2util_cpu_to_be32_buffer(data, 8); |
| 1111 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1112 | hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1113 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1114 | if (sbp2util_access_timeout(lu, 2*HZ)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1115 | SBP2_INFO("Error querying logins to SBP-2 device - timed out"); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1116 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1117 | } |
| 1118 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1119 | if (lu->status_block.ORB_offset_lo != lu->query_logins_orb_dma) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1120 | SBP2_INFO("Error querying logins to SBP-2 device - timed out"); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1121 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1122 | } |
| 1123 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1124 | if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) { |
Stefan Richter | 6065772 | 2006-07-23 22:18:00 +0200 | [diff] [blame] | 1125 | SBP2_INFO("Error querying logins to SBP-2 device - failed"); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1126 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1127 | } |
| 1128 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1129 | sbp2util_cpu_to_be32_buffer(lu->query_logins_response, |
| 1130 | sizeof(struct sbp2_query_logins_response)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1131 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1132 | max_logins = RESPONSE_GET_MAX_LOGINS( |
| 1133 | lu->query_logins_response->length_max_logins); |
Ben Collins | 20f4578 | 2006-06-12 18:13:11 -0400 | [diff] [blame] | 1134 | SBP2_INFO("Maximum concurrent logins supported: %d", max_logins); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1135 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1136 | active_logins = RESPONSE_GET_ACTIVE_LOGINS( |
| 1137 | lu->query_logins_response->length_max_logins); |
Ben Collins | 20f4578 | 2006-06-12 18:13:11 -0400 | [diff] [blame] | 1138 | SBP2_INFO("Number of active logins: %d", active_logins); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1139 | |
| 1140 | if (active_logins >= max_logins) { |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1141 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1142 | } |
| 1143 | |
| 1144 | return 0; |
| 1145 | } |
| 1146 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1147 | static int sbp2_login_device(struct sbp2_lu *lu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1148 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1149 | struct sbp2_fwhost_info *hi = lu->hi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1150 | quadlet_t data[2]; |
| 1151 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1152 | if (!lu->login_orb) |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1153 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1154 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1155 | if (!sbp2_exclusive_login && sbp2_query_logins(lu)) { |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1156 | SBP2_INFO("Device does not support any more concurrent logins"); |
| 1157 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1158 | } |
| 1159 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1160 | /* assume no password */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1161 | lu->login_orb->password_hi = 0; |
| 1162 | lu->login_orb->password_lo = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1163 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1164 | lu->login_orb->login_response_lo = lu->login_response_dma; |
| 1165 | lu->login_orb->login_response_hi = ORB_SET_NODE_ID(hi->host->node_id); |
| 1166 | lu->login_orb->lun_misc = ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST); |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1167 | |
| 1168 | /* one second reconnect time */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1169 | lu->login_orb->lun_misc |= ORB_SET_RECONNECT(0); |
| 1170 | lu->login_orb->lun_misc |= ORB_SET_EXCLUSIVE(sbp2_exclusive_login); |
| 1171 | lu->login_orb->lun_misc |= ORB_SET_NOTIFY(1); |
| 1172 | lu->login_orb->lun_misc |= ORB_SET_LUN(lu->lun); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1173 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1174 | lu->login_orb->passwd_resp_lengths = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1175 | ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1176 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1177 | lu->login_orb->status_fifo_hi = |
| 1178 | ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id); |
| 1179 | lu->login_orb->status_fifo_lo = |
| 1180 | ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1181 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1182 | sbp2util_cpu_to_be32_buffer(lu->login_orb, |
| 1183 | sizeof(struct sbp2_login_orb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1184 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1185 | memset(lu->login_response, 0, sizeof(struct sbp2_login_response)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1186 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1187 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1188 | data[1] = lu->login_orb_dma; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1189 | sbp2util_cpu_to_be32_buffer(data, 8); |
| 1190 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1191 | hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1192 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1193 | /* wait up to 20 seconds for login status */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1194 | if (sbp2util_access_timeout(lu, 20*HZ)) { |
Stefan Richter | e8398bb | 2006-07-23 22:19:00 +0200 | [diff] [blame] | 1195 | SBP2_ERR("Error logging into SBP-2 device - timed out"); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1196 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1197 | } |
| 1198 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1199 | /* make sure that the returned status matches the login ORB */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1200 | if (lu->status_block.ORB_offset_lo != lu->login_orb_dma) { |
Stefan Richter | 6065772 | 2006-07-23 22:18:00 +0200 | [diff] [blame] | 1201 | SBP2_ERR("Error logging into SBP-2 device - timed out"); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1202 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1203 | } |
| 1204 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1205 | if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) { |
Stefan Richter | 6065772 | 2006-07-23 22:18:00 +0200 | [diff] [blame] | 1206 | SBP2_ERR("Error logging into SBP-2 device - failed"); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1207 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1208 | } |
| 1209 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1210 | sbp2util_cpu_to_be32_buffer(lu->login_response, |
| 1211 | sizeof(struct sbp2_login_response)); |
| 1212 | lu->command_block_agent_addr = |
| 1213 | ((u64)lu->login_response->command_block_agent_hi) << 32; |
| 1214 | lu->command_block_agent_addr |= |
| 1215 | ((u64)lu->login_response->command_block_agent_lo); |
| 1216 | lu->command_block_agent_addr &= 0x0000ffffffffffffULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1217 | |
| 1218 | SBP2_INFO("Logged into SBP-2 device"); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1219 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1220 | } |
| 1221 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1222 | static int sbp2_logout_device(struct sbp2_lu *lu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1223 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1224 | struct sbp2_fwhost_info *hi = lu->hi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1225 | quadlet_t data[2]; |
| 1226 | int error; |
| 1227 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1228 | lu->logout_orb->reserved1 = 0x0; |
| 1229 | lu->logout_orb->reserved2 = 0x0; |
| 1230 | lu->logout_orb->reserved3 = 0x0; |
| 1231 | lu->logout_orb->reserved4 = 0x0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1232 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1233 | lu->logout_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST); |
| 1234 | lu->logout_orb->login_ID_misc |= |
| 1235 | ORB_SET_LOGIN_ID(lu->login_response->length_login_ID); |
| 1236 | lu->logout_orb->login_ID_misc |= ORB_SET_NOTIFY(1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1237 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1238 | lu->logout_orb->reserved5 = 0x0; |
| 1239 | lu->logout_orb->status_fifo_hi = |
| 1240 | ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id); |
| 1241 | lu->logout_orb->status_fifo_lo = |
| 1242 | ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1243 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1244 | sbp2util_cpu_to_be32_buffer(lu->logout_orb, |
| 1245 | sizeof(struct sbp2_logout_orb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1246 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1247 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1248 | data[1] = lu->logout_orb_dma; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1249 | sbp2util_cpu_to_be32_buffer(data, 8); |
| 1250 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1251 | error = hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1252 | if (error) |
| 1253 | return error; |
| 1254 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1255 | /* wait up to 1 second for the device to complete logout */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1256 | if (sbp2util_access_timeout(lu, HZ)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1257 | return -EIO; |
| 1258 | |
| 1259 | SBP2_INFO("Logged out of SBP-2 device"); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1260 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1261 | } |
| 1262 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1263 | static int sbp2_reconnect_device(struct sbp2_lu *lu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1264 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1265 | struct sbp2_fwhost_info *hi = lu->hi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1266 | quadlet_t data[2]; |
| 1267 | int error; |
| 1268 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1269 | lu->reconnect_orb->reserved1 = 0x0; |
| 1270 | lu->reconnect_orb->reserved2 = 0x0; |
| 1271 | lu->reconnect_orb->reserved3 = 0x0; |
| 1272 | lu->reconnect_orb->reserved4 = 0x0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1273 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1274 | lu->reconnect_orb->login_ID_misc = |
| 1275 | ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST); |
| 1276 | lu->reconnect_orb->login_ID_misc |= |
| 1277 | ORB_SET_LOGIN_ID(lu->login_response->length_login_ID); |
| 1278 | lu->reconnect_orb->login_ID_misc |= ORB_SET_NOTIFY(1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1279 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1280 | lu->reconnect_orb->reserved5 = 0x0; |
| 1281 | lu->reconnect_orb->status_fifo_hi = |
| 1282 | ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id); |
| 1283 | lu->reconnect_orb->status_fifo_lo = |
| 1284 | ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1285 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1286 | sbp2util_cpu_to_be32_buffer(lu->reconnect_orb, |
| 1287 | sizeof(struct sbp2_reconnect_orb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1288 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1289 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1290 | data[1] = lu->reconnect_orb_dma; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1291 | sbp2util_cpu_to_be32_buffer(data, 8); |
| 1292 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1293 | error = hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1294 | if (error) |
| 1295 | return error; |
| 1296 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1297 | /* wait up to 1 second for reconnect status */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1298 | if (sbp2util_access_timeout(lu, HZ)) { |
Stefan Richter | e8398bb | 2006-07-23 22:19:00 +0200 | [diff] [blame] | 1299 | SBP2_ERR("Error reconnecting to SBP-2 device - timed out"); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1300 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1301 | } |
| 1302 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1303 | /* make sure that the returned status matches the reconnect ORB */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1304 | if (lu->status_block.ORB_offset_lo != lu->reconnect_orb_dma) { |
Stefan Richter | 6065772 | 2006-07-23 22:18:00 +0200 | [diff] [blame] | 1305 | SBP2_ERR("Error reconnecting to SBP-2 device - timed out"); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1306 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1307 | } |
| 1308 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1309 | if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) { |
Stefan Richter | 6065772 | 2006-07-23 22:18:00 +0200 | [diff] [blame] | 1310 | SBP2_ERR("Error reconnecting to SBP-2 device - failed"); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1311 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1312 | } |
| 1313 | |
Stefan Richter | 3564409 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1314 | SBP2_INFO("Reconnected to SBP-2 device"); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1315 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1316 | } |
| 1317 | |
| 1318 | /* |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1319 | * Set the target node's Single Phase Retry limit. Affects the target's retry |
| 1320 | * behaviour if our node is too busy to accept requests. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1321 | */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1322 | static int sbp2_set_busy_timeout(struct sbp2_lu *lu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1323 | { |
| 1324 | quadlet_t data; |
| 1325 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1326 | data = cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1327 | if (hpsb_node_write(lu->ne, SBP2_BUSY_TIMEOUT_ADDRESS, &data, 4)) |
Harvey Harrison | b1ce1fd | 2008-03-05 18:24:54 -0800 | [diff] [blame] | 1328 | SBP2_ERR("%s error", __func__); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1329 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1330 | } |
| 1331 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1332 | static void sbp2_parse_unit_directory(struct sbp2_lu *lu, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1333 | struct unit_directory *ud) |
| 1334 | { |
| 1335 | struct csr1212_keyval *kv; |
| 1336 | struct csr1212_dentry *dentry; |
| 1337 | u64 management_agent_addr; |
Stefan Richter | 9117c6d | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1338 | u32 unit_characteristics, firmware_revision; |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 1339 | unsigned workarounds; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1340 | int i; |
| 1341 | |
Stefan Richter | 9117c6d | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1342 | management_agent_addr = 0; |
| 1343 | unit_characteristics = 0; |
| 1344 | firmware_revision = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1345 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1346 | csr1212_for_each_dir_entry(ud->ne->csr, kv, ud->ud_kv, dentry) { |
| 1347 | switch (kv->key.id) { |
| 1348 | case CSR1212_KV_ID_DEPENDENT_INFO: |
Stefan Richter | edf1fb2 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1349 | if (kv->key.type == CSR1212_KV_TYPE_CSR_OFFSET) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1350 | management_agent_addr = |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1351 | CSR1212_REGISTER_SPACE_BASE + |
| 1352 | (kv->value.csr_offset << 2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1353 | |
Stefan Richter | edf1fb2 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1354 | else if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1355 | lu->lun = ORB_SET_LUN(kv->value.immediate); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1356 | break; |
| 1357 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1358 | case SBP2_UNIT_CHARACTERISTICS_KEY: |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1359 | /* FIXME: This is ignored so far. |
| 1360 | * See SBP-2 clause 7.4.8. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1361 | unit_characteristics = kv->value.immediate; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1362 | break; |
| 1363 | |
| 1364 | case SBP2_FIRMWARE_REVISION_KEY: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1365 | firmware_revision = kv->value.immediate; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1366 | break; |
| 1367 | |
| 1368 | default: |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1369 | /* FIXME: Check for SBP2_DEVICE_TYPE_AND_LUN_KEY. |
| 1370 | * Its "ordered" bit has consequences for command ORB |
| 1371 | * list handling. See SBP-2 clauses 4.6, 7.4.11, 10.2 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1372 | break; |
| 1373 | } |
| 1374 | } |
| 1375 | |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 1376 | workarounds = sbp2_default_workarounds; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1377 | |
Stefan Richter | 679c0cd | 2006-05-15 22:08:09 +0200 | [diff] [blame] | 1378 | if (!(workarounds & SBP2_WORKAROUND_OVERRIDE)) |
| 1379 | for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) { |
Stefan Richter | 4618fd3 | 2006-12-30 15:37:09 +0100 | [diff] [blame] | 1380 | if (sbp2_workarounds_table[i].firmware_revision != |
| 1381 | SBP2_ROM_VALUE_WILDCARD && |
Stefan Richter | 679c0cd | 2006-05-15 22:08:09 +0200 | [diff] [blame] | 1382 | sbp2_workarounds_table[i].firmware_revision != |
| 1383 | (firmware_revision & 0xffff00)) |
| 1384 | continue; |
Stefan Richter | 4618fd3 | 2006-12-30 15:37:09 +0100 | [diff] [blame] | 1385 | if (sbp2_workarounds_table[i].model_id != |
| 1386 | SBP2_ROM_VALUE_WILDCARD && |
Stefan Richter | 679c0cd | 2006-05-15 22:08:09 +0200 | [diff] [blame] | 1387 | sbp2_workarounds_table[i].model_id != ud->model_id) |
| 1388 | continue; |
| 1389 | workarounds |= sbp2_workarounds_table[i].workarounds; |
| 1390 | break; |
| 1391 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1392 | |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 1393 | if (workarounds) |
Stefan Richter | e9a1c52 | 2006-05-15 22:06:37 +0200 | [diff] [blame] | 1394 | SBP2_INFO("Workarounds for node " NODE_BUS_FMT ": 0x%x " |
| 1395 | "(firmware_revision 0x%06x, vendor_id 0x%06x," |
| 1396 | " model_id 0x%06x)", |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 1397 | NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid), |
Stefan Richter | e9a1c52 | 2006-05-15 22:06:37 +0200 | [diff] [blame] | 1398 | workarounds, firmware_revision, |
| 1399 | ud->vendor_id ? ud->vendor_id : ud->ne->vendor_id, |
| 1400 | ud->model_id); |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 1401 | |
| 1402 | /* We would need one SCSI host template for each target to adjust |
| 1403 | * max_sectors on the fly, therefore warn only. */ |
| 1404 | if (workarounds & SBP2_WORKAROUND_128K_MAX_TRANS && |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1405 | (sbp2_max_sectors * 512) > (128 * 1024)) |
Stefan Richter | 3564409 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1406 | SBP2_INFO("Node " NODE_BUS_FMT ": Bridge only supports 128KB " |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 1407 | "max transfer size. WARNING: Current max_sectors " |
| 1408 | "setting is larger than 128KB (%d sectors)", |
| 1409 | NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid), |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1410 | sbp2_max_sectors); |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 1411 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1412 | /* If this is a logical unit directory entry, process the parent |
| 1413 | * to get the values. */ |
| 1414 | if (ud->flags & UNIT_DIRECTORY_LUN_DIRECTORY) { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1415 | struct unit_directory *parent_ud = container_of( |
| 1416 | ud->device.parent, struct unit_directory, device); |
| 1417 | sbp2_parse_unit_directory(lu, parent_ud); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1418 | } else { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1419 | lu->management_agent_addr = management_agent_addr; |
| 1420 | lu->workarounds = workarounds; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1421 | if (ud->flags & UNIT_DIRECTORY_HAS_LUN) |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1422 | lu->lun = ORB_SET_LUN(ud->lun); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1423 | } |
| 1424 | } |
| 1425 | |
Ben Collins | fd23ade | 2006-06-12 18:14:14 -0400 | [diff] [blame] | 1426 | #define SBP2_PAYLOAD_TO_BYTES(p) (1 << ((p) + 2)) |
| 1427 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1428 | /* |
| 1429 | * This function is called in order to determine the max speed and packet |
| 1430 | * size we can use in our ORBs. Note, that we (the driver and host) only |
| 1431 | * initiate the transaction. The SBP-2 device actually transfers the data |
| 1432 | * (by reading from the DMA area we tell it). This means that the SBP-2 |
| 1433 | * device decides the actual maximum data it can transfer. We just tell it |
| 1434 | * the speed that it needs to use, and the max_rec the host supports, and |
| 1435 | * it takes care of the rest. |
| 1436 | */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1437 | static int sbp2_max_speed_and_size(struct sbp2_lu *lu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1438 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1439 | struct sbp2_fwhost_info *hi = lu->hi; |
Ben Collins | fd23ade | 2006-06-12 18:14:14 -0400 | [diff] [blame] | 1440 | u8 payload; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1441 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1442 | lu->speed_code = hi->host->speed[NODEID_TO_NODE(lu->ne->nodeid)]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1443 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1444 | if (lu->speed_code > sbp2_max_speed) { |
| 1445 | lu->speed_code = sbp2_max_speed; |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1446 | SBP2_INFO("Reducing speed to %s", |
| 1447 | hpsb_speedto_str[sbp2_max_speed]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1448 | } |
| 1449 | |
| 1450 | /* Payload size is the lesser of what our speed supports and what |
| 1451 | * our host supports. */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1452 | payload = min(sbp2_speedto_max_payload[lu->speed_code], |
Ben Collins | fd23ade | 2006-06-12 18:14:14 -0400 | [diff] [blame] | 1453 | (u8) (hi->host->csr.max_rec - 1)); |
| 1454 | |
| 1455 | /* If physical DMA is off, work around limitation in ohci1394: |
| 1456 | * packet size must not exceed PAGE_SIZE */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1457 | if (lu->ne->host->low_addr_space < (1ULL << 32)) |
Ben Collins | fd23ade | 2006-06-12 18:14:14 -0400 | [diff] [blame] | 1458 | while (SBP2_PAYLOAD_TO_BYTES(payload) + 24 > PAGE_SIZE && |
| 1459 | payload) |
| 1460 | payload--; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1461 | |
Stefan Richter | 3564409 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1462 | SBP2_INFO("Node " NODE_BUS_FMT ": Max speed [%s] - Max payload [%u]", |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1463 | NODE_BUS_ARGS(hi->host, lu->ne->nodeid), |
| 1464 | hpsb_speedto_str[lu->speed_code], |
Stefan Richter | 3564409 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1465 | SBP2_PAYLOAD_TO_BYTES(payload)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1466 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1467 | lu->max_payload_size = payload; |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1468 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1469 | } |
| 1470 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1471 | static int sbp2_agent_reset(struct sbp2_lu *lu, int wait) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1472 | { |
| 1473 | quadlet_t data; |
| 1474 | u64 addr; |
| 1475 | int retval; |
Stefan Richter | cc07818 | 2006-07-23 22:12:00 +0200 | [diff] [blame] | 1476 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1477 | |
Stefan Richter | ec9b7e1 | 2006-12-07 23:23:25 +0100 | [diff] [blame] | 1478 | /* flush lu->protocol_work */ |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 1479 | if (wait) |
| 1480 | flush_scheduled_work(); |
| 1481 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1482 | data = ntohl(SBP2_AGENT_RESET_DATA); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1483 | addr = lu->command_block_agent_addr + SBP2_AGENT_RESET_OFFSET; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1484 | |
| 1485 | if (wait) |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1486 | retval = hpsb_node_write(lu->ne, addr, &data, 4); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1487 | else |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1488 | retval = sbp2util_node_write_no_wait(lu->ne, addr, &data, 4); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1489 | |
| 1490 | if (retval < 0) { |
| 1491 | SBP2_ERR("hpsb_node_write failed.\n"); |
| 1492 | return -EIO; |
| 1493 | } |
| 1494 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1495 | /* make sure that the ORB_POINTER is written on next command */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1496 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
| 1497 | lu->last_orb = NULL; |
| 1498 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1499 | |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1500 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1501 | } |
| 1502 | |
Stefan Richter | cd8c79f | 2008-08-09 20:16:24 +0200 | [diff] [blame] | 1503 | static int sbp2_prep_command_orb_sg(struct sbp2_command_orb *orb, |
| 1504 | struct sbp2_fwhost_info *hi, |
| 1505 | struct sbp2_command_info *cmd, |
Stefan Richter | ed6ffd0 | 2008-08-14 09:28:14 +0200 | [diff] [blame] | 1506 | unsigned int sg_count, |
Stefan Richter | cd8c79f | 2008-08-09 20:16:24 +0200 | [diff] [blame] | 1507 | struct scatterlist *sg, |
| 1508 | u32 orb_direction, |
| 1509 | enum dma_data_direction dma_dir) |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1510 | { |
Stefan Richter | cd8c79f | 2008-08-09 20:16:24 +0200 | [diff] [blame] | 1511 | struct device *dmadev = hi->host->device.parent; |
Stefan Richter | ed6ffd0 | 2008-08-14 09:28:14 +0200 | [diff] [blame] | 1512 | struct sbp2_unrestricted_page_table *pt; |
| 1513 | int i, n; |
Stefan Richter | cd8c79f | 2008-08-09 20:16:24 +0200 | [diff] [blame] | 1514 | |
Stefan Richter | ed6ffd0 | 2008-08-14 09:28:14 +0200 | [diff] [blame] | 1515 | n = dma_map_sg(dmadev, sg, sg_count, dma_dir); |
| 1516 | if (n == 0) |
| 1517 | return -ENOMEM; |
| 1518 | |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1519 | orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); |
| 1520 | orb->misc |= ORB_SET_DIRECTION(orb_direction); |
| 1521 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1522 | /* special case if only one element (and less than 64KB in size) */ |
Stefan Richter | ed6ffd0 | 2008-08-14 09:28:14 +0200 | [diff] [blame] | 1523 | if (n == 1) { |
| 1524 | orb->misc |= ORB_SET_DATA_SIZE(sg_dma_len(sg)); |
| 1525 | orb->data_descriptor_lo = sg_dma_address(sg); |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1526 | } else { |
Stefan Richter | ed6ffd0 | 2008-08-14 09:28:14 +0200 | [diff] [blame] | 1527 | pt = &cmd->scatter_gather_element[0]; |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1528 | |
Stefan Richter | cd8c79f | 2008-08-09 20:16:24 +0200 | [diff] [blame] | 1529 | dma_sync_single_for_cpu(dmadev, cmd->sge_dma, |
Stefan Richter | 0a77b17 | 2008-08-09 20:13:00 +0200 | [diff] [blame] | 1530 | sizeof(cmd->scatter_gather_element), |
| 1531 | DMA_TO_DEVICE); |
| 1532 | |
Stefan Richter | ed6ffd0 | 2008-08-14 09:28:14 +0200 | [diff] [blame] | 1533 | for_each_sg(sg, sg, n, i) { |
| 1534 | pt[i].high = cpu_to_be32(sg_dma_len(sg) << 16); |
| 1535 | pt[i].low = cpu_to_be32(sg_dma_address(sg)); |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1536 | } |
| 1537 | |
Stefan Richter | ed6ffd0 | 2008-08-14 09:28:14 +0200 | [diff] [blame] | 1538 | orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1) | |
| 1539 | ORB_SET_DATA_SIZE(n); |
| 1540 | orb->data_descriptor_lo = cmd->sge_dma; |
Stefan Richter | 0a77b17 | 2008-08-09 20:13:00 +0200 | [diff] [blame] | 1541 | |
Stefan Richter | cd8c79f | 2008-08-09 20:16:24 +0200 | [diff] [blame] | 1542 | dma_sync_single_for_device(dmadev, cmd->sge_dma, |
Stefan Richter | 0a77b17 | 2008-08-09 20:13:00 +0200 | [diff] [blame] | 1543 | sizeof(cmd->scatter_gather_element), |
| 1544 | DMA_TO_DEVICE); |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1545 | } |
Stefan Richter | cd8c79f | 2008-08-09 20:16:24 +0200 | [diff] [blame] | 1546 | return 0; |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1547 | } |
| 1548 | |
Stefan Richter | cd8c79f | 2008-08-09 20:16:24 +0200 | [diff] [blame] | 1549 | static int sbp2_create_command_orb(struct sbp2_lu *lu, |
| 1550 | struct sbp2_command_info *cmd, |
| 1551 | struct scsi_cmnd *SCpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1552 | { |
Stefan Richter | 0a77b17 | 2008-08-09 20:13:00 +0200 | [diff] [blame] | 1553 | struct device *dmadev = lu->hi->host->device.parent; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1554 | struct sbp2_command_orb *orb = &cmd->command_orb; |
Stefan Richter | 93c596f | 2008-05-04 16:54:14 +0200 | [diff] [blame] | 1555 | unsigned int scsi_request_bufflen = scsi_bufflen(SCpnt); |
| 1556 | enum dma_data_direction dma_dir = SCpnt->sc_data_direction; |
Stefan Richter | cd8c79f | 2008-08-09 20:16:24 +0200 | [diff] [blame] | 1557 | u32 orb_direction; |
| 1558 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1559 | |
Stefan Richter | 0a77b17 | 2008-08-09 20:13:00 +0200 | [diff] [blame] | 1560 | dma_sync_single_for_cpu(dmadev, cmd->command_orb_dma, |
| 1561 | sizeof(struct sbp2_command_orb), DMA_TO_DEVICE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1562 | /* |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1563 | * Set-up our command ORB. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1564 | * |
| 1565 | * NOTE: We're doing unrestricted page tables (s/g), as this is |
| 1566 | * best performance (at least with the devices I have). This means |
| 1567 | * that data_size becomes the number of s/g elements, and |
| 1568 | * page_size should be zero (for unrestricted). |
| 1569 | */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1570 | orb->next_ORB_hi = ORB_SET_NULL_PTR(1); |
| 1571 | orb->next_ORB_lo = 0x0; |
| 1572 | orb->misc = ORB_SET_MAX_PAYLOAD(lu->max_payload_size); |
| 1573 | orb->misc |= ORB_SET_SPEED(lu->speed_code); |
| 1574 | orb->misc |= ORB_SET_NOTIFY(1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1575 | |
Stefan Richter | 43863eb | 2005-12-12 23:03:24 -0500 | [diff] [blame] | 1576 | if (dma_dir == DMA_NONE) |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1577 | orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER; |
Stefan Richter | 43863eb | 2005-12-12 23:03:24 -0500 | [diff] [blame] | 1578 | else if (dma_dir == DMA_TO_DEVICE && scsi_request_bufflen) |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1579 | orb_direction = ORB_DIRECTION_WRITE_TO_MEDIA; |
Stefan Richter | 43863eb | 2005-12-12 23:03:24 -0500 | [diff] [blame] | 1580 | else if (dma_dir == DMA_FROM_DEVICE && scsi_request_bufflen) |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1581 | orb_direction = ORB_DIRECTION_READ_FROM_MEDIA; |
Stefan Richter | 43863eb | 2005-12-12 23:03:24 -0500 | [diff] [blame] | 1582 | else { |
Stefan Richter | 3564409 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1583 | SBP2_INFO("Falling back to DMA_NONE"); |
Stefan Richter | 43863eb | 2005-12-12 23:03:24 -0500 | [diff] [blame] | 1584 | orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1585 | } |
| 1586 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1587 | /* set up our page table stuff */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1588 | if (orb_direction == ORB_DIRECTION_NO_DATA_TRANSFER) { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1589 | orb->data_descriptor_hi = 0x0; |
| 1590 | orb->data_descriptor_lo = 0x0; |
| 1591 | orb->misc |= ORB_SET_DIRECTION(1); |
Stefan Richter | cd8c79f | 2008-08-09 20:16:24 +0200 | [diff] [blame] | 1592 | ret = 0; |
| 1593 | } else { |
| 1594 | ret = sbp2_prep_command_orb_sg(orb, lu->hi, cmd, |
| 1595 | scsi_sg_count(SCpnt), |
| 1596 | scsi_sglist(SCpnt), |
| 1597 | orb_direction, dma_dir); |
| 1598 | } |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1599 | sbp2util_cpu_to_be32_buffer(orb, sizeof(*orb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1600 | |
Stefan Richter | 93c596f | 2008-05-04 16:54:14 +0200 | [diff] [blame] | 1601 | memset(orb->cdb, 0, sizeof(orb->cdb)); |
| 1602 | memcpy(orb->cdb, SCpnt->cmnd, SCpnt->cmd_len); |
Stefan Richter | 0a77b17 | 2008-08-09 20:13:00 +0200 | [diff] [blame] | 1603 | |
| 1604 | dma_sync_single_for_device(dmadev, cmd->command_orb_dma, |
| 1605 | sizeof(struct sbp2_command_orb), DMA_TO_DEVICE); |
Stefan Richter | cd8c79f | 2008-08-09 20:16:24 +0200 | [diff] [blame] | 1606 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1607 | } |
| 1608 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1609 | static void sbp2_link_orb_command(struct sbp2_lu *lu, |
| 1610 | struct sbp2_command_info *cmd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1611 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1612 | struct sbp2_fwhost_info *hi = lu->hi; |
Stefan Richter | cc07818 | 2006-07-23 22:12:00 +0200 | [diff] [blame] | 1613 | struct sbp2_command_orb *last_orb; |
| 1614 | dma_addr_t last_orb_dma; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1615 | u64 addr = lu->command_block_agent_addr; |
Stefan Richter | cc07818 | 2006-07-23 22:12:00 +0200 | [diff] [blame] | 1616 | quadlet_t data[2]; |
| 1617 | size_t length; |
| 1618 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1619 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1620 | /* check to see if there are any previous orbs to use */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1621 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
| 1622 | last_orb = lu->last_orb; |
| 1623 | last_orb_dma = lu->last_orb_dma; |
Stefan Richter | cc07818 | 2006-07-23 22:12:00 +0200 | [diff] [blame] | 1624 | if (!last_orb) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1625 | /* |
Stefan Richter | cc07818 | 2006-07-23 22:12:00 +0200 | [diff] [blame] | 1626 | * last_orb == NULL means: We know that the target's fetch agent |
| 1627 | * is not active right now. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1628 | */ |
Stefan Richter | cc07818 | 2006-07-23 22:12:00 +0200 | [diff] [blame] | 1629 | addr += SBP2_ORB_POINTER_OFFSET; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1630 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1631 | data[1] = cmd->command_orb_dma; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1632 | sbp2util_cpu_to_be32_buffer(data, 8); |
Stefan Richter | cc07818 | 2006-07-23 22:12:00 +0200 | [diff] [blame] | 1633 | length = 8; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1634 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1635 | /* |
Stefan Richter | cc07818 | 2006-07-23 22:12:00 +0200 | [diff] [blame] | 1636 | * last_orb != NULL means: We know that the target's fetch agent |
| 1637 | * is (very probably) not dead or in reset state right now. |
| 1638 | * We have an ORB already sent that we can append a new one to. |
| 1639 | * The target's fetch agent may or may not have read this |
| 1640 | * previous ORB yet. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1641 | */ |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 1642 | dma_sync_single_for_cpu(hi->host->device.parent, last_orb_dma, |
Stefan Richter | 9b7d9c0 | 2006-11-22 21:44:34 +0100 | [diff] [blame] | 1643 | sizeof(struct sbp2_command_orb), |
| 1644 | DMA_TO_DEVICE); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1645 | last_orb->next_ORB_lo = cpu_to_be32(cmd->command_orb_dma); |
Stefan Richter | cc07818 | 2006-07-23 22:12:00 +0200 | [diff] [blame] | 1646 | wmb(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1647 | /* Tells hardware that this pointer is valid */ |
Stefan Richter | cc07818 | 2006-07-23 22:12:00 +0200 | [diff] [blame] | 1648 | last_orb->next_ORB_hi = 0; |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 1649 | dma_sync_single_for_device(hi->host->device.parent, |
| 1650 | last_orb_dma, |
Stefan Richter | 9b7d9c0 | 2006-11-22 21:44:34 +0100 | [diff] [blame] | 1651 | sizeof(struct sbp2_command_orb), |
| 1652 | DMA_TO_DEVICE); |
Stefan Richter | cc07818 | 2006-07-23 22:12:00 +0200 | [diff] [blame] | 1653 | addr += SBP2_DOORBELL_OFFSET; |
| 1654 | data[0] = 0; |
| 1655 | length = 4; |
| 1656 | } |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1657 | lu->last_orb = &cmd->command_orb; |
| 1658 | lu->last_orb_dma = cmd->command_orb_dma; |
| 1659 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1660 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1661 | if (sbp2util_node_write_no_wait(lu->ne, addr, data, length)) { |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 1662 | /* |
| 1663 | * sbp2util_node_write_no_wait failed. We certainly ran out |
| 1664 | * of transaction labels, perhaps just because there were no |
| 1665 | * context switches which gave khpsbpkt a chance to collect |
| 1666 | * free tlabels. Try again in non-atomic context. If necessary, |
| 1667 | * the workqueue job will sleep to guaranteedly get a tlabel. |
| 1668 | * We do not accept new commands until the job is over. |
| 1669 | */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1670 | scsi_block_requests(lu->shost); |
| 1671 | PREPARE_WORK(&lu->protocol_work, |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 1672 | last_orb ? sbp2util_write_doorbell: |
Stefan Richter | ec9b7e1 | 2006-12-07 23:23:25 +0100 | [diff] [blame] | 1673 | sbp2util_write_orb_pointer); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1674 | schedule_work(&lu->protocol_work); |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 1675 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1676 | } |
| 1677 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1678 | static int sbp2_send_command(struct sbp2_lu *lu, struct scsi_cmnd *SCpnt, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1679 | void (*done)(struct scsi_cmnd *)) |
| 1680 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1681 | struct sbp2_command_info *cmd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1682 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1683 | cmd = sbp2util_allocate_command_orb(lu, SCpnt, done); |
| 1684 | if (!cmd) |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1685 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1686 | |
Stefan Richter | cd8c79f | 2008-08-09 20:16:24 +0200 | [diff] [blame] | 1687 | if (sbp2_create_command_orb(lu, cmd, SCpnt)) |
| 1688 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1689 | |
Stefan Richter | cd8c79f | 2008-08-09 20:16:24 +0200 | [diff] [blame] | 1690 | sbp2_link_orb_command(lu, cmd); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1691 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1692 | } |
| 1693 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1694 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1695 | * Translates SBP-2 status into SCSI sense data for check conditions |
| 1696 | */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1697 | static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status, |
| 1698 | unchar *sense_data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1699 | { |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1700 | /* OK, it's pretty ugly... ;-) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1701 | sense_data[0] = 0x70; |
| 1702 | sense_data[1] = 0x0; |
| 1703 | sense_data[2] = sbp2_status[9]; |
| 1704 | sense_data[3] = sbp2_status[12]; |
| 1705 | sense_data[4] = sbp2_status[13]; |
| 1706 | sense_data[5] = sbp2_status[14]; |
| 1707 | sense_data[6] = sbp2_status[15]; |
| 1708 | sense_data[7] = 10; |
| 1709 | sense_data[8] = sbp2_status[16]; |
| 1710 | sense_data[9] = sbp2_status[17]; |
| 1711 | sense_data[10] = sbp2_status[18]; |
| 1712 | sense_data[11] = sbp2_status[19]; |
| 1713 | sense_data[12] = sbp2_status[10]; |
| 1714 | sense_data[13] = sbp2_status[11]; |
| 1715 | sense_data[14] = sbp2_status[20]; |
| 1716 | sense_data[15] = sbp2_status[21]; |
| 1717 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1718 | return sbp2_status[8] & 0x3f; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1719 | } |
| 1720 | |
Stefan Richter | 3e98eab4 | 2006-07-23 22:16:00 +0200 | [diff] [blame] | 1721 | static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid, |
| 1722 | int destid, quadlet_t *data, u64 addr, |
| 1723 | size_t length, u16 fl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1724 | { |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1725 | struct sbp2_fwhost_info *hi; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1726 | struct sbp2_lu *lu = NULL, *lu_tmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1727 | struct scsi_cmnd *SCpnt = NULL; |
Stefan Richter | 3e98eab4 | 2006-07-23 22:16:00 +0200 | [diff] [blame] | 1728 | struct sbp2_status_block *sb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1729 | u32 scsi_status = SBP2_SCSI_STATUS_GOOD; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1730 | struct sbp2_command_info *cmd; |
Jody McIntyre | 7945619 | 2005-11-07 06:29:39 -0500 | [diff] [blame] | 1731 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1732 | |
Stefan Richter | 6065772 | 2006-07-23 22:18:00 +0200 | [diff] [blame] | 1733 | if (unlikely(length < 8 || length > sizeof(struct sbp2_status_block))) { |
| 1734 | SBP2_ERR("Wrong size of status block"); |
| 1735 | return RCODE_ADDRESS_ERROR; |
| 1736 | } |
| 1737 | if (unlikely(!host)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1738 | SBP2_ERR("host is NULL - this is bad!"); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1739 | return RCODE_ADDRESS_ERROR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1740 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1741 | hi = hpsb_get_hostinfo(&sbp2_highlevel, host); |
Stefan Richter | 6065772 | 2006-07-23 22:18:00 +0200 | [diff] [blame] | 1742 | if (unlikely(!hi)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1743 | SBP2_ERR("host info is NULL - this is bad!"); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1744 | return RCODE_ADDRESS_ERROR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1745 | } |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1746 | |
| 1747 | /* Find the unit which wrote the status. */ |
Stefan Richter | 261b5f6 | 2007-08-11 11:52:08 +0200 | [diff] [blame] | 1748 | read_lock_irqsave(&sbp2_hi_logical_units_lock, flags); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1749 | list_for_each_entry(lu_tmp, &hi->logical_units, lu_list) { |
| 1750 | if (lu_tmp->ne->nodeid == nodeid && |
| 1751 | lu_tmp->status_fifo_addr == addr) { |
| 1752 | lu = lu_tmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1753 | break; |
| 1754 | } |
| 1755 | } |
Stefan Richter | 261b5f6 | 2007-08-11 11:52:08 +0200 | [diff] [blame] | 1756 | read_unlock_irqrestore(&sbp2_hi_logical_units_lock, flags); |
| 1757 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1758 | if (unlikely(!lu)) { |
| 1759 | SBP2_ERR("lu is NULL - device is gone?"); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1760 | return RCODE_ADDRESS_ERROR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1761 | } |
| 1762 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1763 | /* Put response into lu status fifo buffer. The first two bytes |
Stefan Richter | 3e98eab4 | 2006-07-23 22:16:00 +0200 | [diff] [blame] | 1764 | * come in big endian bit order. Often the target writes only a |
| 1765 | * truncated status block, minimally the first two quadlets. The rest |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1766 | * is implied to be zeros. */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1767 | sb = &lu->status_block; |
Stefan Richter | 3e98eab4 | 2006-07-23 22:16:00 +0200 | [diff] [blame] | 1768 | memset(sb->command_set_dependent, 0, sizeof(sb->command_set_dependent)); |
| 1769 | memcpy(sb, data, length); |
| 1770 | sbp2util_be32_to_cpu_buffer(sb, 8); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1771 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1772 | /* Ignore unsolicited status. Handle command ORB status. */ |
Stefan Richter | 6065772 | 2006-07-23 22:18:00 +0200 | [diff] [blame] | 1773 | if (unlikely(STATUS_GET_SRC(sb->ORB_offset_hi_misc) == 2)) |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1774 | cmd = NULL; |
Stefan Richter | 6065772 | 2006-07-23 22:18:00 +0200 | [diff] [blame] | 1775 | else |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1776 | cmd = sbp2util_find_command_for_orb(lu, sb->ORB_offset_lo); |
| 1777 | if (cmd) { |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1778 | /* Grab SCSI command pointers and check status. */ |
Stefan Richter | 6065772 | 2006-07-23 22:18:00 +0200 | [diff] [blame] | 1779 | /* |
| 1780 | * FIXME: If the src field in the status is 1, the ORB DMA must |
| 1781 | * not be reused until status for a subsequent ORB is received. |
| 1782 | */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1783 | SCpnt = cmd->Current_SCpnt; |
| 1784 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
| 1785 | sbp2util_mark_command_completed(lu, cmd); |
| 1786 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1787 | |
| 1788 | if (SCpnt) { |
Stefan Richter | abbca10 | 2006-08-14 18:51:00 +0200 | [diff] [blame] | 1789 | u32 h = sb->ORB_offset_hi_misc; |
| 1790 | u32 r = STATUS_GET_RESP(h); |
| 1791 | |
| 1792 | if (r != RESP_STATUS_REQUEST_COMPLETE) { |
Stefan Richter | 3564409 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1793 | SBP2_INFO("resp 0x%x, sbp_status 0x%x", |
Stefan Richter | abbca10 | 2006-08-14 18:51:00 +0200 | [diff] [blame] | 1794 | r, STATUS_GET_SBP_STATUS(h)); |
Stefan Richter | 6065772 | 2006-07-23 22:18:00 +0200 | [diff] [blame] | 1795 | scsi_status = |
Stefan Richter | abbca10 | 2006-08-14 18:51:00 +0200 | [diff] [blame] | 1796 | r == RESP_STATUS_TRANSPORT_FAILURE ? |
| 1797 | SBP2_SCSI_STATUS_BUSY : |
Stefan Richter | 6065772 | 2006-07-23 22:18:00 +0200 | [diff] [blame] | 1798 | SBP2_SCSI_STATUS_COMMAND_TERMINATED; |
Stefan Richter | abbca10 | 2006-08-14 18:51:00 +0200 | [diff] [blame] | 1799 | } |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1800 | |
Stefan Richter | edf1fb2 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1801 | if (STATUS_GET_LEN(h) > 1) |
Stefan Richter | 3e98eab4 | 2006-07-23 22:16:00 +0200 | [diff] [blame] | 1802 | scsi_status = sbp2_status_to_sense_data( |
| 1803 | (unchar *)sb, SCpnt->sense_buffer); |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1804 | |
Stefan Richter | edf1fb2 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1805 | if (STATUS_TEST_DEAD(h)) |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1806 | sbp2_agent_reset(lu, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1807 | } |
| 1808 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1809 | /* Check here to see if there are no commands in-use. If there |
Stefan Richter | cc07818 | 2006-07-23 22:12:00 +0200 | [diff] [blame] | 1810 | * are none, we know that the fetch agent left the active state |
| 1811 | * _and_ that we did not reactivate it yet. Therefore clear |
| 1812 | * last_orb so that next time we write directly to the |
| 1813 | * ORB_POINTER register. That way the fetch agent does not need |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1814 | * to refetch the next_ORB. */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1815 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
| 1816 | if (list_empty(&lu->cmd_orb_inuse)) |
| 1817 | lu->last_orb = NULL; |
| 1818 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1819 | |
| 1820 | } else { |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1821 | /* It's probably status after a management request. */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1822 | if ((sb->ORB_offset_lo == lu->reconnect_orb_dma) || |
| 1823 | (sb->ORB_offset_lo == lu->login_orb_dma) || |
| 1824 | (sb->ORB_offset_lo == lu->query_logins_orb_dma) || |
| 1825 | (sb->ORB_offset_lo == lu->logout_orb_dma)) { |
| 1826 | lu->access_complete = 1; |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1827 | wake_up_interruptible(&sbp2_access_wq); |
Stefan Richter | e8398bb | 2006-07-23 22:19:00 +0200 | [diff] [blame] | 1828 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1829 | } |
| 1830 | |
Stefan Richter | edf1fb2 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1831 | if (SCpnt) |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1832 | sbp2scsi_complete_command(lu, scsi_status, SCpnt, |
| 1833 | cmd->Current_done); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1834 | return RCODE_COMPLETE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1835 | } |
| 1836 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1837 | /************************************** |
| 1838 | * SCSI interface related section |
| 1839 | **************************************/ |
| 1840 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1841 | static int sbp2scsi_queuecommand(struct scsi_cmnd *SCpnt, |
| 1842 | void (*done)(struct scsi_cmnd *)) |
| 1843 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1844 | struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0]; |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1845 | struct sbp2_fwhost_info *hi; |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 1846 | int result = DID_NO_CONNECT << 16; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1847 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1848 | if (unlikely(!sbp2util_node_is_available(lu))) |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 1849 | goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1850 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1851 | hi = lu->hi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1852 | |
Stefan Richter | 5796aa7 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1853 | if (unlikely(!hi)) { |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1854 | SBP2_ERR("sbp2_fwhost_info is NULL - this is bad!"); |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 1855 | goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1856 | } |
| 1857 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1858 | /* Multiple units are currently represented to the SCSI core as separate |
| 1859 | * targets, not as one target with multiple LUs. Therefore return |
| 1860 | * selection time-out to any IO directed at non-zero LUNs. */ |
Stefan Richter | 5796aa7 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1861 | if (unlikely(SCpnt->device->lun)) |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 1862 | goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1863 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1864 | if (unlikely(!hpsb_node_entry_valid(lu->ne))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1865 | SBP2_ERR("Bus reset in progress - rejecting command"); |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 1866 | result = DID_BUS_BUSY << 16; |
| 1867 | goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1868 | } |
| 1869 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1870 | /* Bidirectional commands are not yet implemented, |
| 1871 | * and unknown transfer direction not handled. */ |
Stefan Richter | 5796aa7 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1872 | if (unlikely(SCpnt->sc_data_direction == DMA_BIDIRECTIONAL)) { |
Stefan Richter | 43863eb | 2005-12-12 23:03:24 -0500 | [diff] [blame] | 1873 | SBP2_ERR("Cannot handle DMA_BIDIRECTIONAL - rejecting command"); |
| 1874 | result = DID_ERROR << 16; |
| 1875 | goto done; |
| 1876 | } |
| 1877 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1878 | if (sbp2_send_command(lu, SCpnt, done)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1879 | SBP2_ERR("Error sending SCSI command"); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1880 | sbp2scsi_complete_command(lu, |
| 1881 | SBP2_SCSI_STATUS_SELECTION_TIMEOUT, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1882 | SCpnt, done); |
| 1883 | } |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 1884 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1885 | |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 1886 | done: |
| 1887 | SCpnt->result = result; |
| 1888 | done(SCpnt); |
| 1889 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1890 | } |
| 1891 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1892 | static void sbp2scsi_complete_all_commands(struct sbp2_lu *lu, u32 status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1893 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1894 | struct list_head *lh; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1895 | struct sbp2_command_info *cmd; |
Jody McIntyre | 7945619 | 2005-11-07 06:29:39 -0500 | [diff] [blame] | 1896 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1897 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1898 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
| 1899 | while (!list_empty(&lu->cmd_orb_inuse)) { |
| 1900 | lh = lu->cmd_orb_inuse.next; |
| 1901 | cmd = list_entry(lh, struct sbp2_command_info, list); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1902 | sbp2util_mark_command_completed(lu, cmd); |
| 1903 | if (cmd->Current_SCpnt) { |
| 1904 | cmd->Current_SCpnt->result = status << 16; |
| 1905 | cmd->Current_done(cmd->Current_SCpnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1906 | } |
| 1907 | } |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1908 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1909 | |
| 1910 | return; |
| 1911 | } |
| 1912 | |
| 1913 | /* |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1914 | * Complete a regular SCSI command. Can be called in atomic context. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1915 | */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1916 | static void sbp2scsi_complete_command(struct sbp2_lu *lu, u32 scsi_status, |
| 1917 | struct scsi_cmnd *SCpnt, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1918 | void (*done)(struct scsi_cmnd *)) |
| 1919 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1920 | if (!SCpnt) { |
| 1921 | SBP2_ERR("SCpnt is NULL"); |
| 1922 | return; |
| 1923 | } |
| 1924 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1925 | switch (scsi_status) { |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1926 | case SBP2_SCSI_STATUS_GOOD: |
Stefan Richter | 8f0525f | 2006-03-28 20:03:45 -0500 | [diff] [blame] | 1927 | SCpnt->result = DID_OK << 16; |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1928 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1929 | |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1930 | case SBP2_SCSI_STATUS_BUSY: |
| 1931 | SBP2_ERR("SBP2_SCSI_STATUS_BUSY"); |
| 1932 | SCpnt->result = DID_BUS_BUSY << 16; |
| 1933 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1934 | |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1935 | case SBP2_SCSI_STATUS_CHECK_CONDITION: |
Stefan Richter | 8f0525f | 2006-03-28 20:03:45 -0500 | [diff] [blame] | 1936 | SCpnt->result = CHECK_CONDITION << 1 | DID_OK << 16; |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1937 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1938 | |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1939 | case SBP2_SCSI_STATUS_SELECTION_TIMEOUT: |
| 1940 | SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT"); |
| 1941 | SCpnt->result = DID_NO_CONNECT << 16; |
| 1942 | scsi_print_command(SCpnt); |
| 1943 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1944 | |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1945 | case SBP2_SCSI_STATUS_CONDITION_MET: |
| 1946 | case SBP2_SCSI_STATUS_RESERVATION_CONFLICT: |
| 1947 | case SBP2_SCSI_STATUS_COMMAND_TERMINATED: |
| 1948 | SBP2_ERR("Bad SCSI status = %x", scsi_status); |
| 1949 | SCpnt->result = DID_ERROR << 16; |
| 1950 | scsi_print_command(SCpnt); |
| 1951 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1952 | |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1953 | default: |
| 1954 | SBP2_ERR("Unsupported SCSI status = %x", scsi_status); |
| 1955 | SCpnt->result = DID_ERROR << 16; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1956 | } |
| 1957 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1958 | /* If a bus reset is in progress and there was an error, complete |
| 1959 | * the command as busy so that it will get retried. */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1960 | if (!hpsb_node_entry_valid(lu->ne) |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1961 | && (scsi_status != SBP2_SCSI_STATUS_GOOD)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1962 | SBP2_ERR("Completing command with busy (bus reset)"); |
| 1963 | SCpnt->result = DID_BUS_BUSY << 16; |
| 1964 | } |
| 1965 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1966 | /* Tell the SCSI stack that we're done with this command. */ |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1967 | done(SCpnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1968 | } |
| 1969 | |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 1970 | static int sbp2scsi_slave_alloc(struct scsi_device *sdev) |
| 1971 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1972 | struct sbp2_lu *lu = (struct sbp2_lu *)sdev->host->hostdata[0]; |
Stefan Richter | a80614d | 2006-02-14 22:04:19 -0500 | [diff] [blame] | 1973 | |
Stefan Richter | ef774c1 | 2008-02-17 14:57:10 +0100 | [diff] [blame] | 1974 | if (sdev->lun != 0 || sdev->id != lu->ud->id || sdev->channel != 0) |
| 1975 | return -ENODEV; |
| 1976 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1977 | lu->sdev = sdev; |
Stefan Richter | c394f1e | 2006-08-07 20:48:00 +0200 | [diff] [blame] | 1978 | sdev->allow_restart = 1; |
Stefan Richter | a80614d | 2006-02-14 22:04:19 -0500 | [diff] [blame] | 1979 | |
Stefan Richter | a4b47d6 | 2008-01-27 22:32:22 +0100 | [diff] [blame] | 1980 | /* SBP-2 requires quadlet alignment of the data buffers. */ |
| 1981 | blk_queue_update_dma_alignment(sdev->request_queue, 4 - 1); |
James Bottomley | 465ff31 | 2008-01-01 10:00:10 -0600 | [diff] [blame] | 1982 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1983 | if (lu->workarounds & SBP2_WORKAROUND_INQUIRY_36) |
Stefan Richter | a80614d | 2006-02-14 22:04:19 -0500 | [diff] [blame] | 1984 | sdev->inquiry_len = 36; |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 1985 | return 0; |
| 1986 | } |
| 1987 | |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 1988 | static int sbp2scsi_slave_configure(struct scsi_device *sdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1989 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1990 | struct sbp2_lu *lu = (struct sbp2_lu *)sdev->host->hostdata[0]; |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 1991 | |
Ben Collins | 365c786 | 2005-11-07 06:31:24 -0500 | [diff] [blame] | 1992 | sdev->use_10_for_rw = 1; |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 1993 | |
Stefan Richter | 82f06e8 | 2008-05-11 00:37:14 +0200 | [diff] [blame] | 1994 | if (sbp2_exclusive_login) |
| 1995 | sdev->manage_start_stop = 1; |
Stefan Richter | 1a74bc6 | 2007-01-10 20:17:15 +0100 | [diff] [blame] | 1996 | if (sdev->type == TYPE_ROM) |
| 1997 | sdev->use_10_for_ms = 1; |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 1998 | if (sdev->type == TYPE_DISK && |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1999 | lu->workarounds & SBP2_WORKAROUND_MODE_SENSE_8) |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 2000 | sdev->skip_ms_page_8 = 1; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2001 | if (lu->workarounds & SBP2_WORKAROUND_FIX_CAPACITY) |
Stefan Richter | e9a1c52 | 2006-05-15 22:06:37 +0200 | [diff] [blame] | 2002 | sdev->fix_capacity = 1; |
Stefan Richter | 3719122 | 2008-05-11 00:35:55 +0200 | [diff] [blame] | 2003 | if (lu->workarounds & SBP2_WORKAROUND_POWER_CONDITION) |
| 2004 | sdev->start_stop_pwr_cond = 1; |
Stefan Richter | 4e6343a | 2007-12-16 17:31:26 +0100 | [diff] [blame] | 2005 | if (lu->workarounds & SBP2_WORKAROUND_128K_MAX_TRANS) |
| 2006 | blk_queue_max_sectors(sdev->request_queue, 128 * 1024 / 512); |
Stefan Richter | ed6ffd0 | 2008-08-14 09:28:14 +0200 | [diff] [blame] | 2007 | |
| 2008 | blk_queue_max_segment_size(sdev->request_queue, SBP2_MAX_SEG_SIZE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2009 | return 0; |
| 2010 | } |
| 2011 | |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 2012 | static void sbp2scsi_slave_destroy(struct scsi_device *sdev) |
| 2013 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2014 | ((struct sbp2_lu *)sdev->host->hostdata[0])->sdev = NULL; |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 2015 | return; |
| 2016 | } |
| 2017 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2018 | /* |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2019 | * Called by scsi stack when something has really gone wrong. |
| 2020 | * Usually called when a command has timed-out for some reason. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2021 | */ |
| 2022 | static int sbp2scsi_abort(struct scsi_cmnd *SCpnt) |
| 2023 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2024 | struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0]; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2025 | struct sbp2_command_info *cmd; |
Stefan Richter | 24c7cd0 | 2006-04-01 21:11:41 +0200 | [diff] [blame] | 2026 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2027 | |
Stefan Richter | 3564409 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2028 | SBP2_INFO("aborting sbp2 command"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2029 | scsi_print_command(SCpnt); |
| 2030 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2031 | if (sbp2util_node_is_available(lu)) { |
| 2032 | sbp2_agent_reset(lu, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2033 | |
Stefan Richter | 23077f1 | 2006-09-11 20:17:14 +0200 | [diff] [blame] | 2034 | /* Return a matching command structure to the free pool. */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2035 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
| 2036 | cmd = sbp2util_find_command_for_SCpnt(lu, SCpnt); |
| 2037 | if (cmd) { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2038 | sbp2util_mark_command_completed(lu, cmd); |
| 2039 | if (cmd->Current_SCpnt) { |
| 2040 | cmd->Current_SCpnt->result = DID_ABORT << 16; |
| 2041 | cmd->Current_done(cmd->Current_SCpnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2042 | } |
| 2043 | } |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2044 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2045 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2046 | sbp2scsi_complete_all_commands(lu, DID_BUS_BUSY); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2047 | } |
| 2048 | |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 2049 | return SUCCESS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2050 | } |
| 2051 | |
| 2052 | /* |
| 2053 | * Called by scsi stack when something has really gone wrong. |
| 2054 | */ |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 2055 | static int sbp2scsi_reset(struct scsi_cmnd *SCpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2056 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2057 | struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2058 | |
Stefan Richter | 3564409 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2059 | SBP2_INFO("reset requested"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2060 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2061 | if (sbp2util_node_is_available(lu)) { |
Stefan Richter | 3564409 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2062 | SBP2_INFO("generating sbp2 fetch agent reset"); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2063 | sbp2_agent_reset(lu, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2064 | } |
| 2065 | |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 2066 | return SUCCESS; |
Jeff Garzik | 94d0e7b8 | 2005-05-28 07:55:48 -0400 | [diff] [blame] | 2067 | } |
| 2068 | |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 2069 | static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev, |
| 2070 | struct device_attribute *attr, |
| 2071 | char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2072 | { |
| 2073 | struct scsi_device *sdev; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2074 | struct sbp2_lu *lu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2075 | |
| 2076 | if (!(sdev = to_scsi_device(dev))) |
| 2077 | return 0; |
| 2078 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2079 | if (!(lu = (struct sbp2_lu *)sdev->host->hostdata[0])) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2080 | return 0; |
| 2081 | |
Stefan Richter | d7794c8 | 2007-05-27 13:17:15 +0200 | [diff] [blame] | 2082 | if (sbp2_long_sysfs_ieee1394_id) |
| 2083 | return sprintf(buf, "%016Lx:%06x:%04x\n", |
| 2084 | (unsigned long long)lu->ne->guid, |
| 2085 | lu->ud->directory_id, ORB_SET_LUN(lu->lun)); |
| 2086 | else |
| 2087 | return sprintf(buf, "%016Lx:%d:%d\n", |
| 2088 | (unsigned long long)lu->ne->guid, |
| 2089 | lu->ud->id, ORB_SET_LUN(lu->lun)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2090 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2091 | |
| 2092 | MODULE_AUTHOR("Ben Collins <bcollins@debian.org>"); |
| 2093 | MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver"); |
| 2094 | MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME); |
| 2095 | MODULE_LICENSE("GPL"); |
| 2096 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2097 | static int sbp2_module_init(void) |
| 2098 | { |
| 2099 | int ret; |
| 2100 | |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2101 | if (sbp2_serialize_io) { |
| 2102 | sbp2_shost_template.can_queue = 1; |
| 2103 | sbp2_shost_template.cmd_per_lun = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2104 | } |
| 2105 | |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2106 | sbp2_shost_template.max_sectors = sbp2_max_sectors; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2107 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2108 | hpsb_register_highlevel(&sbp2_highlevel); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2109 | ret = hpsb_register_protocol(&sbp2_driver); |
| 2110 | if (ret) { |
| 2111 | SBP2_ERR("Failed to register protocol"); |
| 2112 | hpsb_unregister_highlevel(&sbp2_highlevel); |
| 2113 | return ret; |
| 2114 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2115 | return 0; |
| 2116 | } |
| 2117 | |
| 2118 | static void __exit sbp2_module_exit(void) |
| 2119 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2120 | hpsb_unregister_protocol(&sbp2_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2121 | hpsb_unregister_highlevel(&sbp2_highlevel); |
| 2122 | } |
| 2123 | |
| 2124 | module_init(sbp2_module_init); |
| 2125 | module_exit(sbp2_module_exit); |