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 | * |
| 186 | * - override internal blacklist |
| 187 | * Instead of adding to the built-in blacklist, use only the workarounds |
| 188 | * specified in the module load parameter. |
| 189 | * Useful if a blacklist entry interfered with a non-broken device. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | */ |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 191 | static int sbp2_default_workarounds; |
| 192 | module_param_named(workarounds, sbp2_default_workarounds, int, 0644); |
| 193 | MODULE_PARM_DESC(workarounds, "Work around device bugs (default = 0" |
| 194 | ", 128kB max transfer = " __stringify(SBP2_WORKAROUND_128K_MAX_TRANS) |
| 195 | ", 36 byte inquiry = " __stringify(SBP2_WORKAROUND_INQUIRY_36) |
| 196 | ", skip mode page 8 = " __stringify(SBP2_WORKAROUND_MODE_SENSE_8) |
Stefan Richter | e9a1c52 | 2006-05-15 22:06:37 +0200 | [diff] [blame] | 197 | ", fix capacity = " __stringify(SBP2_WORKAROUND_FIX_CAPACITY) |
Stefan Richter | 679c0cd | 2006-05-15 22:08:09 +0200 | [diff] [blame] | 198 | ", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE) |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 199 | ", or a combination)"); |
| 200 | |
Stefan Richter | d7794c8 | 2007-05-27 13:17:15 +0200 | [diff] [blame] | 201 | /* |
| 202 | * This influences the format of the sysfs attribute |
| 203 | * /sys/bus/scsi/devices/.../ieee1394_id. |
| 204 | * |
| 205 | * The default format is like in older kernels: %016Lx:%d:%d |
| 206 | * It contains the target's EUI-64, a number given to the logical unit by |
| 207 | * the ieee1394 driver's nodemgr (starting at 0), and the LUN. |
| 208 | * |
| 209 | * The long format is: %016Lx:%06x:%04x |
| 210 | * It contains the target's EUI-64, the unit directory's directory_ID as per |
| 211 | * IEEE 1212 clause 7.7.19, and the LUN. This format comes closest to the |
| 212 | * format of SBP(-3) target port and logical unit identifier as per SAM (SCSI |
| 213 | * Architecture Model) rev.2 to 4 annex A. Therefore and because it is |
| 214 | * independent of the implementation of the ieee1394 nodemgr, the longer format |
| 215 | * is recommended for future use. |
| 216 | */ |
| 217 | static int sbp2_long_sysfs_ieee1394_id; |
| 218 | module_param_named(long_ieee1394_id, sbp2_long_sysfs_ieee1394_id, bool, 0644); |
| 219 | MODULE_PARM_DESC(long_ieee1394_id, "8+3+2 bytes format of ieee1394_id in sysfs " |
| 220 | "(default = backwards-compatible = N, SAM-conforming = Y)"); |
| 221 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | |
Stefan Richter | edf1fb2 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 223 | #define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args) |
| 224 | #define SBP2_ERR(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | /* |
| 227 | * Globals |
| 228 | */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 229 | static void sbp2scsi_complete_all_commands(struct sbp2_lu *, u32); |
| 230 | static void sbp2scsi_complete_command(struct sbp2_lu *, u32, struct scsi_cmnd *, |
Stefan Richter | ea42ea0 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 231 | void (*)(struct scsi_cmnd *)); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 232 | static struct sbp2_lu *sbp2_alloc_device(struct unit_directory *); |
| 233 | static int sbp2_start_device(struct sbp2_lu *); |
| 234 | static void sbp2_remove_device(struct sbp2_lu *); |
| 235 | static int sbp2_login_device(struct sbp2_lu *); |
| 236 | static int sbp2_reconnect_device(struct sbp2_lu *); |
| 237 | static int sbp2_logout_device(struct sbp2_lu *); |
Stefan Richter | ea42ea0 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 238 | static void sbp2_host_reset(struct hpsb_host *); |
| 239 | static int sbp2_handle_status_write(struct hpsb_host *, int, int, quadlet_t *, |
| 240 | u64, size_t, u16); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 241 | static int sbp2_agent_reset(struct sbp2_lu *, int); |
| 242 | static void sbp2_parse_unit_directory(struct sbp2_lu *, |
Stefan Richter | ea42ea0 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 243 | struct unit_directory *); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 244 | static int sbp2_set_busy_timeout(struct sbp2_lu *); |
| 245 | static int sbp2_max_speed_and_size(struct sbp2_lu *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | |
| 248 | static const u8 sbp2_speedto_max_payload[] = { 0x7, 0x8, 0x9, 0xA, 0xB, 0xC }; |
| 249 | |
Stefan Richter | 261b5f6 | 2007-08-11 11:52:08 +0200 | [diff] [blame] | 250 | static DEFINE_RWLOCK(sbp2_hi_logical_units_lock); |
| 251 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | static struct hpsb_highlevel sbp2_highlevel = { |
Stefan Richter | ea42ea0 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 253 | .name = SBP2_DEVICE_NAME, |
| 254 | .host_reset = sbp2_host_reset, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | }; |
| 256 | |
| 257 | static struct hpsb_address_ops sbp2_ops = { |
Stefan Richter | ea42ea0 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 258 | .write = sbp2_handle_status_write |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | }; |
| 260 | |
| 261 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA |
Stefan Richter | ea42ea0 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 262 | static int sbp2_handle_physdma_write(struct hpsb_host *, int, int, quadlet_t *, |
| 263 | u64, size_t, u16); |
| 264 | static int sbp2_handle_physdma_read(struct hpsb_host *, int, quadlet_t *, u64, |
| 265 | size_t, u16); |
| 266 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | static struct hpsb_address_ops sbp2_physdma_ops = { |
Stefan Richter | ea42ea0 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 268 | .read = sbp2_handle_physdma_read, |
| 269 | .write = sbp2_handle_physdma_write, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | }; |
| 271 | #endif |
| 272 | |
Stefan Richter | ea42ea0 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 273 | |
| 274 | /* |
| 275 | * Interface to driver core and IEEE 1394 core |
| 276 | */ |
| 277 | static struct ieee1394_device_id sbp2_id_table[] = { |
| 278 | { |
| 279 | .match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION, |
| 280 | .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY & 0xffffff, |
| 281 | .version = SBP2_SW_VERSION_ENTRY & 0xffffff}, |
| 282 | {} |
| 283 | }; |
| 284 | MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table); |
| 285 | |
| 286 | static int sbp2_probe(struct device *); |
| 287 | static int sbp2_remove(struct device *); |
| 288 | static int sbp2_update(struct unit_directory *); |
| 289 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | static struct hpsb_protocol_driver sbp2_driver = { |
Ben Collins | ed30c26 | 2006-11-23 13:59:48 -0500 | [diff] [blame] | 291 | .name = SBP2_DEVICE_NAME, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | .id_table = sbp2_id_table, |
| 293 | .update = sbp2_update, |
| 294 | .driver = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | .probe = sbp2_probe, |
| 296 | .remove = sbp2_remove, |
| 297 | }, |
| 298 | }; |
| 299 | |
Stefan Richter | ea42ea0 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 300 | |
| 301 | /* |
| 302 | * Interface to SCSI core |
| 303 | */ |
| 304 | static int sbp2scsi_queuecommand(struct scsi_cmnd *, |
| 305 | void (*)(struct scsi_cmnd *)); |
| 306 | static int sbp2scsi_abort(struct scsi_cmnd *); |
| 307 | static int sbp2scsi_reset(struct scsi_cmnd *); |
| 308 | static int sbp2scsi_slave_alloc(struct scsi_device *); |
| 309 | static int sbp2scsi_slave_configure(struct scsi_device *); |
| 310 | static void sbp2scsi_slave_destroy(struct scsi_device *); |
| 311 | static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *, |
| 312 | struct device_attribute *, char *); |
| 313 | |
| 314 | static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL); |
| 315 | |
| 316 | static struct device_attribute *sbp2_sysfs_sdev_attrs[] = { |
| 317 | &dev_attr_ieee1394_id, |
| 318 | NULL |
| 319 | }; |
| 320 | |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 321 | static struct scsi_host_template sbp2_shost_template = { |
Stefan Richter | ea42ea0 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 322 | .module = THIS_MODULE, |
| 323 | .name = "SBP-2 IEEE-1394", |
| 324 | .proc_name = SBP2_DEVICE_NAME, |
| 325 | .queuecommand = sbp2scsi_queuecommand, |
| 326 | .eh_abort_handler = sbp2scsi_abort, |
| 327 | .eh_device_reset_handler = sbp2scsi_reset, |
| 328 | .slave_alloc = sbp2scsi_slave_alloc, |
| 329 | .slave_configure = sbp2scsi_slave_configure, |
| 330 | .slave_destroy = sbp2scsi_slave_destroy, |
| 331 | .this_id = -1, |
| 332 | .sg_tablesize = SG_ALL, |
| 333 | .use_clustering = ENABLE_CLUSTERING, |
| 334 | .cmd_per_lun = SBP2_MAX_CMDS, |
| 335 | .can_queue = SBP2_MAX_CMDS, |
Stefan Richter | ea42ea0 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 336 | .sdev_attrs = sbp2_sysfs_sdev_attrs, |
| 337 | }; |
| 338 | |
Stefan Richter | 4618fd3 | 2006-12-30 15:37:09 +0100 | [diff] [blame] | 339 | /* for match-all entries in sbp2_workarounds_table */ |
| 340 | #define SBP2_ROM_VALUE_WILDCARD 0x1000000 |
Stefan Richter | ea42ea0 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 341 | |
Stefan Richter | a80614d | 2006-02-14 22:04:19 -0500 | [diff] [blame] | 342 | /* |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 343 | * List of devices with known bugs. |
| 344 | * |
| 345 | * The firmware_revision field, masked with 0xffff00, is the best indicator |
| 346 | * for the type of bridge chip of a device. It yields a few false positives |
| 347 | * but this did not break correctly behaving devices so far. |
Stefan Richter | a80614d | 2006-02-14 22:04:19 -0500 | [diff] [blame] | 348 | */ |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 349 | static const struct { |
| 350 | u32 firmware_revision; |
Stefan Richter | e9a1c52 | 2006-05-15 22:06:37 +0200 | [diff] [blame] | 351 | u32 model_id; |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 352 | unsigned workarounds; |
| 353 | } sbp2_workarounds_table[] = { |
Ben Collins | 4b9a334 | 2006-06-12 18:10:18 -0400 | [diff] [blame] | 354 | /* DViCO Momobay CX-1 with TSB42AA9 bridge */ { |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 355 | .firmware_revision = 0x002800, |
Ben Collins | 4b9a334 | 2006-06-12 18:10:18 -0400 | [diff] [blame] | 356 | .model_id = 0x001010, |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 357 | .workarounds = SBP2_WORKAROUND_INQUIRY_36 | |
| 358 | SBP2_WORKAROUND_MODE_SENSE_8, |
| 359 | }, |
| 360 | /* Initio bridges, actually only needed for some older ones */ { |
| 361 | .firmware_revision = 0x000200, |
Stefan Richter | 4618fd3 | 2006-12-30 15:37:09 +0100 | [diff] [blame] | 362 | .model_id = SBP2_ROM_VALUE_WILDCARD, |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 363 | .workarounds = SBP2_WORKAROUND_INQUIRY_36, |
| 364 | }, |
| 365 | /* Symbios bridge */ { |
| 366 | .firmware_revision = 0xa0b800, |
Stefan Richter | 4618fd3 | 2006-12-30 15:37:09 +0100 | [diff] [blame] | 367 | .model_id = SBP2_ROM_VALUE_WILDCARD, |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 368 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS, |
Stefan Richter | e9a1c52 | 2006-05-15 22:06:37 +0200 | [diff] [blame] | 369 | }, |
Stefan Richter | e9a1c52 | 2006-05-15 22:06:37 +0200 | [diff] [blame] | 370 | /* iPod 4th generation */ { |
| 371 | .firmware_revision = 0x0a2700, |
| 372 | .model_id = 0x000021, |
| 373 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, |
| 374 | }, |
| 375 | /* iPod mini */ { |
| 376 | .firmware_revision = 0x0a2700, |
| 377 | .model_id = 0x000023, |
| 378 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, |
| 379 | }, |
| 380 | /* iPod Photo */ { |
| 381 | .firmware_revision = 0x0a2700, |
| 382 | .model_id = 0x00007e, |
| 383 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 384 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | }; |
| 386 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | /************************************** |
| 388 | * General utility functions |
| 389 | **************************************/ |
| 390 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | #ifndef __BIG_ENDIAN |
| 392 | /* |
| 393 | * Converts a buffer from be32 to cpu byte ordering. Length is in bytes. |
| 394 | */ |
Stefan Richter | 2b01b80 | 2006-07-03 12:02:28 -0400 | [diff] [blame] | 395 | static inline void sbp2util_be32_to_cpu_buffer(void *buffer, int length) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | { |
| 397 | u32 *temp = buffer; |
| 398 | |
| 399 | for (length = (length >> 2); length--; ) |
| 400 | temp[length] = be32_to_cpu(temp[length]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | } |
| 402 | |
| 403 | /* |
| 404 | * Converts a buffer from cpu to be32 byte ordering. Length is in bytes. |
| 405 | */ |
Stefan Richter | 2b01b80 | 2006-07-03 12:02:28 -0400 | [diff] [blame] | 406 | static inline void sbp2util_cpu_to_be32_buffer(void *buffer, int length) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | { |
| 408 | u32 *temp = buffer; |
| 409 | |
| 410 | for (length = (length >> 2); length--; ) |
| 411 | temp[length] = cpu_to_be32(temp[length]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | } |
| 413 | #else /* BIG_ENDIAN */ |
| 414 | /* Why waste the cpu cycles? */ |
Stefan Richter | 611aa19 | 2006-08-02 18:44:00 +0200 | [diff] [blame] | 415 | #define sbp2util_be32_to_cpu_buffer(x,y) do {} while (0) |
| 416 | #define sbp2util_cpu_to_be32_buffer(x,y) do {} while (0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | #endif |
| 418 | |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 419 | static DECLARE_WAIT_QUEUE_HEAD(sbp2_access_wq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | |
Stefan Richter | e8398bb | 2006-07-23 22:19:00 +0200 | [diff] [blame] | 421 | /* |
| 422 | * Waits for completion of an SBP-2 access request. |
| 423 | * Returns nonzero if timed out or prematurely interrupted. |
| 424 | */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 425 | static int sbp2util_access_timeout(struct sbp2_lu *lu, int timeout) |
Stefan Richter | e8398bb | 2006-07-23 22:19:00 +0200 | [diff] [blame] | 426 | { |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 427 | long leftover; |
Stefan Richter | e8398bb | 2006-07-23 22:19:00 +0200 | [diff] [blame] | 428 | |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 429 | leftover = wait_event_interruptible_timeout( |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 430 | sbp2_access_wq, lu->access_complete, timeout); |
| 431 | lu->access_complete = 0; |
Stefan Richter | e8398bb | 2006-07-23 22:19:00 +0200 | [diff] [blame] | 432 | return leftover <= 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | } |
| 434 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 435 | static void sbp2_free_packet(void *packet) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | { |
| 437 | hpsb_free_tlabel(packet); |
| 438 | hpsb_free_packet(packet); |
| 439 | } |
| 440 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 441 | /* |
| 442 | * This is much like hpsb_node_write(), except it ignores the response |
| 443 | * subaction and returns immediately. Can be used from atomic context. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | */ |
| 445 | 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] | 446 | quadlet_t *buf, size_t len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | { |
| 448 | struct hpsb_packet *packet; |
| 449 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 450 | packet = hpsb_make_writepacket(ne->host, ne->nodeid, addr, buf, len); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 451 | if (!packet) |
| 452 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 454 | hpsb_set_packet_complete_task(packet, sbp2_free_packet, packet); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | hpsb_node_fill_packet(ne, packet); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 456 | if (hpsb_send_packet(packet) < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | sbp2_free_packet(packet); |
| 458 | return -EIO; |
| 459 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | return 0; |
| 461 | } |
| 462 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 463 | static void sbp2util_notify_fetch_agent(struct sbp2_lu *lu, u64 offset, |
| 464 | quadlet_t *data, size_t len) |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 465 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 466 | /* There is a small window after a bus reset within which the node |
| 467 | * entry's generation is current but the reconnect wasn't completed. */ |
| 468 | if (unlikely(atomic_read(&lu->state) == SBP2LU_STATE_IN_RESET)) |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 469 | return; |
| 470 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 471 | if (hpsb_node_write(lu->ne, lu->command_block_agent_addr + offset, |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 472 | data, len)) |
| 473 | SBP2_ERR("sbp2util_notify_fetch_agent failed."); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 474 | |
| 475 | /* Now accept new SCSI commands, unless a bus reset happended during |
| 476 | * hpsb_node_write. */ |
| 477 | if (likely(atomic_read(&lu->state) != SBP2LU_STATE_IN_RESET)) |
| 478 | scsi_unblock_requests(lu->shost); |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 479 | } |
| 480 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 481 | static void sbp2util_write_orb_pointer(struct work_struct *work) |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 482 | { |
Stefan Richter | ec9b7e1 | 2006-12-07 23:23:25 +0100 | [diff] [blame] | 483 | struct sbp2_lu *lu = container_of(work, struct sbp2_lu, protocol_work); |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 484 | quadlet_t data[2]; |
| 485 | |
Stefan Richter | ec9b7e1 | 2006-12-07 23:23:25 +0100 | [diff] [blame] | 486 | data[0] = ORB_SET_NODE_ID(lu->hi->host->node_id); |
| 487 | data[1] = lu->last_orb_dma; |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 488 | sbp2util_cpu_to_be32_buffer(data, 8); |
Stefan Richter | ec9b7e1 | 2006-12-07 23:23:25 +0100 | [diff] [blame] | 489 | sbp2util_notify_fetch_agent(lu, SBP2_ORB_POINTER_OFFSET, data, 8); |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 490 | } |
| 491 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 492 | static void sbp2util_write_doorbell(struct work_struct *work) |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 493 | { |
Stefan Richter | ec9b7e1 | 2006-12-07 23:23:25 +0100 | [diff] [blame] | 494 | struct sbp2_lu *lu = container_of(work, struct sbp2_lu, protocol_work); |
| 495 | |
| 496 | sbp2util_notify_fetch_agent(lu, SBP2_DOORBELL_OFFSET, NULL, 4); |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 497 | } |
| 498 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 499 | static int sbp2util_create_command_orb_pool(struct sbp2_lu *lu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 501 | struct sbp2_fwhost_info *hi = lu->hi; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 502 | struct sbp2_command_info *cmd; |
Stefan Richter | 3d269cb | 2007-02-04 20:57:38 +0100 | [diff] [blame] | 503 | int i, orbs = sbp2_serialize_io ? 2 : SBP2_MAX_CMDS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | for (i = 0; i < orbs; i++) { |
Stefan Richter | 3d269cb | 2007-02-04 20:57:38 +0100 | [diff] [blame] | 506 | cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); |
| 507 | if (!cmd) |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 508 | return -ENOMEM; |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 509 | cmd->command_orb_dma = dma_map_single(hi->host->device.parent, |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 510 | &cmd->command_orb, |
| 511 | sizeof(struct sbp2_command_orb), |
Stefan Richter | 9b7d9c0 | 2006-11-22 21:44:34 +0100 | [diff] [blame] | 512 | DMA_TO_DEVICE); |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 513 | cmd->sge_dma = dma_map_single(hi->host->device.parent, |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 514 | &cmd->scatter_gather_element, |
| 515 | sizeof(cmd->scatter_gather_element), |
Stefan Richter | 2446a79 | 2007-02-04 20:54:57 +0100 | [diff] [blame] | 516 | DMA_TO_DEVICE); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 517 | INIT_LIST_HEAD(&cmd->list); |
| 518 | list_add_tail(&cmd->list, &lu->cmd_orb_completed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | return 0; |
| 521 | } |
| 522 | |
Stefan Richter | a2ee3f9 | 2007-08-11 11:51:16 +0200 | [diff] [blame] | 523 | static void sbp2util_remove_command_orb_pool(struct sbp2_lu *lu, |
| 524 | struct hpsb_host *host) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | struct list_head *lh, *next; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 527 | struct sbp2_command_info *cmd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | unsigned long flags; |
| 529 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 530 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
| 531 | if (!list_empty(&lu->cmd_orb_completed)) |
| 532 | list_for_each_safe(lh, next, &lu->cmd_orb_completed) { |
| 533 | cmd = list_entry(lh, struct sbp2_command_info, list); |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 534 | dma_unmap_single(host->device.parent, |
| 535 | cmd->command_orb_dma, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | sizeof(struct sbp2_command_orb), |
Stefan Richter | 9b7d9c0 | 2006-11-22 21:44:34 +0100 | [diff] [blame] | 537 | DMA_TO_DEVICE); |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 538 | dma_unmap_single(host->device.parent, cmd->sge_dma, |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 539 | sizeof(cmd->scatter_gather_element), |
Stefan Richter | 2446a79 | 2007-02-04 20:54:57 +0100 | [diff] [blame] | 540 | DMA_TO_DEVICE); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 541 | kfree(cmd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | } |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 543 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | return; |
| 545 | } |
| 546 | |
| 547 | /* |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 548 | * Finds the sbp2_command for a given outstanding command ORB. |
| 549 | * Only looks at the in-use list. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | */ |
| 551 | static struct sbp2_command_info *sbp2util_find_command_for_orb( |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 552 | struct sbp2_lu *lu, dma_addr_t orb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 554 | struct sbp2_command_info *cmd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | unsigned long flags; |
| 556 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 557 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
| 558 | if (!list_empty(&lu->cmd_orb_inuse)) |
| 559 | list_for_each_entry(cmd, &lu->cmd_orb_inuse, list) |
| 560 | if (cmd->command_orb_dma == orb) { |
| 561 | spin_unlock_irqrestore( |
| 562 | &lu->cmd_orb_lock, flags); |
| 563 | return cmd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | } |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 565 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 566 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 567 | } |
| 568 | |
| 569 | /* |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 570 | * Finds the sbp2_command for a given outstanding SCpnt. |
| 571 | * Only looks at the in-use list. |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 572 | * Must be called with lu->cmd_orb_lock held. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | */ |
Stefan Richter | 24c7cd0 | 2006-04-01 21:11:41 +0200 | [diff] [blame] | 574 | static struct sbp2_command_info *sbp2util_find_command_for_SCpnt( |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 575 | struct sbp2_lu *lu, void *SCpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 577 | struct sbp2_command_info *cmd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 579 | if (!list_empty(&lu->cmd_orb_inuse)) |
| 580 | list_for_each_entry(cmd, &lu->cmd_orb_inuse, list) |
| 581 | if (cmd->Current_SCpnt == SCpnt) |
| 582 | return cmd; |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 583 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | } |
| 585 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 586 | static struct sbp2_command_info *sbp2util_allocate_command_orb( |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 587 | struct sbp2_lu *lu, |
| 588 | struct scsi_cmnd *Current_SCpnt, |
| 589 | void (*Current_done)(struct scsi_cmnd *)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | { |
| 591 | struct list_head *lh; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 592 | struct sbp2_command_info *cmd = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | unsigned long flags; |
| 594 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 595 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
| 596 | if (!list_empty(&lu->cmd_orb_completed)) { |
| 597 | lh = lu->cmd_orb_completed.next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | list_del(lh); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 599 | cmd = list_entry(lh, struct sbp2_command_info, list); |
| 600 | cmd->Current_done = Current_done; |
| 601 | cmd->Current_SCpnt = Current_SCpnt; |
| 602 | list_add_tail(&cmd->list, &lu->cmd_orb_inuse); |
| 603 | } else |
Stefan Richter | d024ebc | 2006-03-28 20:03:55 -0500 | [diff] [blame] | 604 | SBP2_ERR("%s: no orbs available", __FUNCTION__); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 605 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); |
| 606 | return cmd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | } |
| 608 | |
Stefan Richter | 58272c1 | 2006-11-04 09:55:33 +0100 | [diff] [blame] | 609 | /* |
| 610 | * Unmaps the DMAs of a command and moves the command to the completed ORB list. |
| 611 | * Must be called with lu->cmd_orb_lock held. |
| 612 | */ |
| 613 | static void sbp2util_mark_command_completed(struct sbp2_lu *lu, |
| 614 | struct sbp2_command_info *cmd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 615 | { |
Stefan Richter | 58272c1 | 2006-11-04 09:55:33 +0100 | [diff] [blame] | 616 | struct hpsb_host *host = lu->ud->ne->host; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 618 | if (cmd->cmd_dma) { |
| 619 | if (cmd->dma_type == CMD_DMA_SINGLE) |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 620 | dma_unmap_single(host->device.parent, cmd->cmd_dma, |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 621 | cmd->dma_size, cmd->dma_dir); |
| 622 | else if (cmd->dma_type == CMD_DMA_PAGE) |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 623 | dma_unmap_page(host->device.parent, cmd->cmd_dma, |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 624 | cmd->dma_size, cmd->dma_dir); |
Stefan Richter | edf1fb2 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 625 | /* XXX: Check for CMD_DMA_NONE bug */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 626 | cmd->dma_type = CMD_DMA_NONE; |
| 627 | cmd->cmd_dma = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | } |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 629 | if (cmd->sge_buffer) { |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 630 | dma_unmap_sg(host->device.parent, cmd->sge_buffer, |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 631 | cmd->dma_size, cmd->dma_dir); |
| 632 | cmd->sge_buffer = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 633 | } |
Stefan Richter | cd641f6 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 634 | list_move_tail(&cmd->list, &lu->cmd_orb_completed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | } |
| 636 | |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 637 | /* |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 638 | * Is lu valid? Is the 1394 node still present? |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 639 | */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 640 | static inline int sbp2util_node_is_available(struct sbp2_lu *lu) |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 641 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 642 | return lu && lu->ne && !lu->ne->in_limbo; |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 643 | } |
| 644 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | /********************************************* |
| 646 | * IEEE-1394 core driver stack related section |
| 647 | *********************************************/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | |
| 649 | static int sbp2_probe(struct device *dev) |
| 650 | { |
| 651 | struct unit_directory *ud; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 652 | struct sbp2_lu *lu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 654 | ud = container_of(dev, struct unit_directory, device); |
| 655 | |
| 656 | /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s) |
| 657 | * instead. */ |
| 658 | if (ud->flags & UNIT_DIRECTORY_HAS_LUN_DIRECTORY) |
| 659 | return -ENODEV; |
| 660 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 661 | lu = sbp2_alloc_device(ud); |
| 662 | if (!lu) |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 663 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 664 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 665 | sbp2_parse_unit_directory(lu, ud); |
| 666 | return sbp2_start_device(lu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 667 | } |
| 668 | |
| 669 | static int sbp2_remove(struct device *dev) |
| 670 | { |
| 671 | struct unit_directory *ud; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 672 | struct sbp2_lu *lu; |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 673 | struct scsi_device *sdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 674 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | ud = container_of(dev, struct unit_directory, device); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 676 | lu = ud->device.driver_data; |
| 677 | if (!lu) |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 678 | return 0; |
| 679 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 680 | if (lu->shost) { |
Stefan Richter | bf637ec | 2006-01-31 00:13:06 -0500 | [diff] [blame] | 681 | /* Get rid of enqueued commands if there is no chance to |
| 682 | * send them. */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 683 | if (!sbp2util_node_is_available(lu)) |
| 684 | sbp2scsi_complete_all_commands(lu, DID_NO_CONNECT); |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 685 | /* scsi_remove_device() may trigger shutdown functions of SCSI |
Stefan Richter | bf637ec | 2006-01-31 00:13:06 -0500 | [diff] [blame] | 686 | * highlevel drivers which would deadlock if blocked. */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 687 | atomic_set(&lu->state, SBP2LU_STATE_IN_SHUTDOWN); |
| 688 | scsi_unblock_requests(lu->shost); |
Stefan Richter | bf637ec | 2006-01-31 00:13:06 -0500 | [diff] [blame] | 689 | } |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 690 | sdev = lu->sdev; |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 691 | if (sdev) { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 692 | lu->sdev = NULL; |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 693 | scsi_remove_device(sdev); |
| 694 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 695 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 696 | sbp2_logout_device(lu); |
| 697 | sbp2_remove_device(lu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | |
| 699 | return 0; |
| 700 | } |
| 701 | |
| 702 | static int sbp2_update(struct unit_directory *ud) |
| 703 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 704 | struct sbp2_lu *lu = ud->device.driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 705 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 706 | if (sbp2_reconnect_device(lu)) { |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 707 | /* Reconnect has failed. Perhaps we didn't reconnect fast |
| 708 | * enough. Try a regular login, but first log out just in |
| 709 | * case of any weirdness. */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 710 | sbp2_logout_device(lu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 712 | if (sbp2_login_device(lu)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 713 | /* Login failed too, just fail, and the backend |
| 714 | * will call our sbp2_remove for us */ |
| 715 | SBP2_ERR("Failed to reconnect to sbp2 device!"); |
| 716 | return -EBUSY; |
| 717 | } |
| 718 | } |
| 719 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 720 | sbp2_set_busy_timeout(lu); |
| 721 | sbp2_agent_reset(lu, 1); |
| 722 | sbp2_max_speed_and_size(lu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 724 | /* Complete any pending commands with busy (so they get retried) |
| 725 | * and remove them from our queue. */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 726 | sbp2scsi_complete_all_commands(lu, DID_BUS_BUSY); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | |
Stefan Richter | 4fc383c | 2006-08-14 18:46:00 +0200 | [diff] [blame] | 728 | /* Accept new commands unless there was another bus reset in the |
| 729 | * meantime. */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 730 | if (hpsb_node_entry_valid(lu->ne)) { |
| 731 | atomic_set(&lu->state, SBP2LU_STATE_RUNNING); |
| 732 | scsi_unblock_requests(lu->shost); |
Stefan Richter | 4fc383c | 2006-08-14 18:46:00 +0200 | [diff] [blame] | 733 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | return 0; |
| 735 | } |
| 736 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 737 | static struct sbp2_lu *sbp2_alloc_device(struct unit_directory *ud) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 738 | { |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 739 | struct sbp2_fwhost_info *hi; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 740 | struct Scsi_Host *shost = NULL; |
| 741 | struct sbp2_lu *lu = NULL; |
Stefan Richter | 261b5f6 | 2007-08-11 11:52:08 +0200 | [diff] [blame] | 742 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 743 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 744 | lu = kzalloc(sizeof(*lu), GFP_KERNEL); |
| 745 | if (!lu) { |
| 746 | SBP2_ERR("failed to create lu"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | goto failed_alloc; |
| 748 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 749 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 750 | lu->ne = ud->ne; |
| 751 | lu->ud = ud; |
| 752 | lu->speed_code = IEEE1394_SPEED_100; |
| 753 | lu->max_payload_size = sbp2_speedto_max_payload[IEEE1394_SPEED_100]; |
| 754 | lu->status_fifo_addr = CSR1212_INVALID_ADDR_SPACE; |
| 755 | INIT_LIST_HEAD(&lu->cmd_orb_inuse); |
| 756 | INIT_LIST_HEAD(&lu->cmd_orb_completed); |
| 757 | INIT_LIST_HEAD(&lu->lu_list); |
| 758 | spin_lock_init(&lu->cmd_orb_lock); |
| 759 | atomic_set(&lu->state, SBP2LU_STATE_RUNNING); |
| 760 | INIT_WORK(&lu->protocol_work, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 762 | ud->device.driver_data = lu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | |
| 764 | hi = hpsb_get_hostinfo(&sbp2_highlevel, ud->ne->host); |
| 765 | if (!hi) { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 766 | hi = hpsb_create_hostinfo(&sbp2_highlevel, ud->ne->host, |
| 767 | sizeof(*hi)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | if (!hi) { |
| 769 | SBP2_ERR("failed to allocate hostinfo"); |
| 770 | goto failed_alloc; |
| 771 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | hi->host = ud->ne->host; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 773 | INIT_LIST_HEAD(&hi->logical_units); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 774 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 775 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA |
| 776 | /* Handle data movement if physical dma is not |
Stefan Richter | 5566405 | 2006-03-28 19:59:42 -0500 | [diff] [blame] | 777 | * enabled or not supported on host controller */ |
| 778 | if (!hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host, |
| 779 | &sbp2_physdma_ops, |
| 780 | 0x0ULL, 0xfffffffcULL)) { |
| 781 | SBP2_ERR("failed to register lower 4GB address range"); |
| 782 | goto failed_alloc; |
| 783 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | #endif |
| 785 | } |
| 786 | |
Stefan Richter | 147830f | 2006-03-28 19:54:52 -0500 | [diff] [blame] | 787 | /* Prevent unloading of the 1394 host */ |
| 788 | if (!try_module_get(hi->host->driver->owner)) { |
| 789 | SBP2_ERR("failed to get a reference on 1394 host driver"); |
| 790 | goto failed_alloc; |
| 791 | } |
| 792 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 793 | lu->hi = hi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 794 | |
Stefan Richter | 261b5f6 | 2007-08-11 11:52:08 +0200 | [diff] [blame] | 795 | write_lock_irqsave(&sbp2_hi_logical_units_lock, flags); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 796 | list_add_tail(&lu->lu_list, &hi->logical_units); |
Stefan Richter | 261b5f6 | 2007-08-11 11:52:08 +0200 | [diff] [blame] | 797 | write_unlock_irqrestore(&sbp2_hi_logical_units_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 798 | |
Stefan Richter | 35bdddb | 2006-01-31 00:13:33 -0500 | [diff] [blame] | 799 | /* Register the status FIFO address range. We could use the same FIFO |
| 800 | * for targets at different nodes. However we need different FIFOs per |
Stefan Richter | a54c9d3 | 2006-05-15 22:09:46 +0200 | [diff] [blame] | 801 | * target in order to support multi-unit devices. |
| 802 | * The FIFO is located out of the local host controller's physical range |
| 803 | * but, if possible, within the posted write area. Status writes will |
| 804 | * then be performed as unified transactions. This slightly reduces |
| 805 | * bandwidth usage, and some Prolific based devices seem to require it. |
| 806 | */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 807 | lu->status_fifo_addr = hpsb_allocate_and_register_addrspace( |
Stefan Richter | 35bdddb | 2006-01-31 00:13:33 -0500 | [diff] [blame] | 808 | &sbp2_highlevel, ud->ne->host, &sbp2_ops, |
| 809 | sizeof(struct sbp2_status_block), sizeof(quadlet_t), |
Ben Collins | 40ae6c5 | 2006-06-12 18:13:49 -0400 | [diff] [blame] | 810 | ud->ne->host->low_addr_space, CSR1212_ALL_SPACE_END); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 811 | if (lu->status_fifo_addr == CSR1212_INVALID_ADDR_SPACE) { |
Stefan Richter | 35bdddb | 2006-01-31 00:13:33 -0500 | [diff] [blame] | 812 | SBP2_ERR("failed to allocate status FIFO address range"); |
| 813 | goto failed_alloc; |
| 814 | } |
| 815 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 816 | shost = scsi_host_alloc(&sbp2_shost_template, sizeof(unsigned long)); |
| 817 | if (!shost) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 818 | SBP2_ERR("failed to register scsi host"); |
| 819 | goto failed_alloc; |
| 820 | } |
| 821 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 822 | shost->hostdata[0] = (unsigned long)lu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 823 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 824 | if (!scsi_add_host(shost, &ud->device)) { |
| 825 | lu->shost = shost; |
| 826 | return lu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 827 | } |
| 828 | |
| 829 | SBP2_ERR("failed to add scsi host"); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 830 | scsi_host_put(shost); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | |
| 832 | failed_alloc: |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 833 | sbp2_remove_device(lu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 834 | return NULL; |
| 835 | } |
| 836 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 837 | static void sbp2_host_reset(struct hpsb_host *host) |
| 838 | { |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 839 | struct sbp2_fwhost_info *hi; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 840 | struct sbp2_lu *lu; |
Stefan Richter | 261b5f6 | 2007-08-11 11:52:08 +0200 | [diff] [blame] | 841 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 842 | |
| 843 | hi = hpsb_get_hostinfo(&sbp2_highlevel, host); |
Stefan Richter | 2cccbb5 | 2006-08-14 18:59:00 +0200 | [diff] [blame] | 844 | if (!hi) |
| 845 | return; |
Stefan Richter | 261b5f6 | 2007-08-11 11:52:08 +0200 | [diff] [blame] | 846 | |
| 847 | read_lock_irqsave(&sbp2_hi_logical_units_lock, flags); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 848 | list_for_each_entry(lu, &hi->logical_units, lu_list) |
| 849 | if (likely(atomic_read(&lu->state) != |
Stefan Richter | 2cccbb5 | 2006-08-14 18:59:00 +0200 | [diff] [blame] | 850 | SBP2LU_STATE_IN_SHUTDOWN)) { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 851 | atomic_set(&lu->state, SBP2LU_STATE_IN_RESET); |
| 852 | scsi_block_requests(lu->shost); |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 853 | } |
Stefan Richter | 261b5f6 | 2007-08-11 11:52:08 +0200 | [diff] [blame] | 854 | read_unlock_irqrestore(&sbp2_hi_logical_units_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 855 | } |
| 856 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 857 | static int sbp2_start_device(struct sbp2_lu *lu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 858 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 859 | struct sbp2_fwhost_info *hi = lu->hi; |
James Bottomley | 146f726 | 2005-09-10 12:44:09 -0500 | [diff] [blame] | 860 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 861 | |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 862 | lu->login_response = dma_alloc_coherent(hi->host->device.parent, |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 863 | sizeof(struct sbp2_login_response), |
Stefan Richter | 9b7d9c0 | 2006-11-22 21:44:34 +0100 | [diff] [blame] | 864 | &lu->login_response_dma, GFP_KERNEL); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 865 | if (!lu->login_response) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | goto alloc_fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 867 | |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 868 | lu->query_logins_orb = dma_alloc_coherent(hi->host->device.parent, |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 869 | sizeof(struct sbp2_query_logins_orb), |
Stefan Richter | 9b7d9c0 | 2006-11-22 21:44:34 +0100 | [diff] [blame] | 870 | &lu->query_logins_orb_dma, GFP_KERNEL); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 871 | if (!lu->query_logins_orb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | goto alloc_fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 873 | |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 874 | lu->query_logins_response = dma_alloc_coherent(hi->host->device.parent, |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 875 | sizeof(struct sbp2_query_logins_response), |
Stefan Richter | 9b7d9c0 | 2006-11-22 21:44:34 +0100 | [diff] [blame] | 876 | &lu->query_logins_response_dma, GFP_KERNEL); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 877 | if (!lu->query_logins_response) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 878 | goto alloc_fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 879 | |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 880 | lu->reconnect_orb = dma_alloc_coherent(hi->host->device.parent, |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 881 | sizeof(struct sbp2_reconnect_orb), |
Stefan Richter | 9b7d9c0 | 2006-11-22 21:44:34 +0100 | [diff] [blame] | 882 | &lu->reconnect_orb_dma, GFP_KERNEL); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 883 | if (!lu->reconnect_orb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 884 | goto alloc_fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 885 | |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 886 | lu->logout_orb = dma_alloc_coherent(hi->host->device.parent, |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 887 | sizeof(struct sbp2_logout_orb), |
Stefan Richter | 9b7d9c0 | 2006-11-22 21:44:34 +0100 | [diff] [blame] | 888 | &lu->logout_orb_dma, GFP_KERNEL); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 889 | if (!lu->logout_orb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | goto alloc_fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 892 | lu->login_orb = dma_alloc_coherent(hi->host->device.parent, |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 893 | sizeof(struct sbp2_login_orb), |
Stefan Richter | 9b7d9c0 | 2006-11-22 21:44:34 +0100 | [diff] [blame] | 894 | &lu->login_orb_dma, GFP_KERNEL); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 895 | if (!lu->login_orb) |
Stefan Richter | eaceec7 | 2005-12-13 11:05:05 -0500 | [diff] [blame] | 896 | goto alloc_fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 897 | |
Stefan Richter | 3d269cb | 2007-02-04 20:57:38 +0100 | [diff] [blame] | 898 | if (sbp2util_create_command_orb_pool(lu)) |
| 899 | goto alloc_fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 900 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 901 | /* Wait a second before trying to log in. Previously logged in |
| 902 | * initiators need a chance to reconnect. */ |
Stefan Richter | 902abed | 2006-08-14 18:56:00 +0200 | [diff] [blame] | 903 | if (msleep_interruptible(1000)) { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 904 | sbp2_remove_device(lu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 905 | return -EINTR; |
| 906 | } |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 907 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 908 | if (sbp2_login_device(lu)) { |
| 909 | sbp2_remove_device(lu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 910 | return -EBUSY; |
| 911 | } |
| 912 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 913 | sbp2_set_busy_timeout(lu); |
| 914 | sbp2_agent_reset(lu, 1); |
| 915 | sbp2_max_speed_and_size(lu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 916 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 917 | error = scsi_add_device(lu->shost, 0, lu->ud->id, 0); |
James Bottomley | 146f726 | 2005-09-10 12:44:09 -0500 | [diff] [blame] | 918 | if (error) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 919 | SBP2_ERR("scsi_add_device failed"); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 920 | sbp2_logout_device(lu); |
| 921 | sbp2_remove_device(lu); |
James Bottomley | 146f726 | 2005-09-10 12:44:09 -0500 | [diff] [blame] | 922 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 923 | } |
| 924 | |
| 925 | return 0; |
Stefan Richter | eaceec7 | 2005-12-13 11:05:05 -0500 | [diff] [blame] | 926 | |
| 927 | alloc_fail: |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 928 | SBP2_ERR("Could not allocate memory for lu"); |
| 929 | sbp2_remove_device(lu); |
Stefan Richter | eaceec7 | 2005-12-13 11:05:05 -0500 | [diff] [blame] | 930 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | } |
| 932 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 933 | static void sbp2_remove_device(struct sbp2_lu *lu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 934 | { |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 935 | struct sbp2_fwhost_info *hi; |
Stefan Richter | 261b5f6 | 2007-08-11 11:52:08 +0200 | [diff] [blame] | 936 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 937 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 938 | if (!lu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | return; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 940 | hi = lu->hi; |
Stefan Richter | a2ee3f9 | 2007-08-11 11:51:16 +0200 | [diff] [blame] | 941 | if (!hi) |
| 942 | goto no_hi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 943 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 944 | if (lu->shost) { |
| 945 | scsi_remove_host(lu->shost); |
| 946 | scsi_host_put(lu->shost); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 947 | } |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 948 | flush_scheduled_work(); |
Stefan Richter | a2ee3f9 | 2007-08-11 11:51:16 +0200 | [diff] [blame] | 949 | sbp2util_remove_command_orb_pool(lu, hi->host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 950 | |
Stefan Richter | 261b5f6 | 2007-08-11 11:52:08 +0200 | [diff] [blame] | 951 | write_lock_irqsave(&sbp2_hi_logical_units_lock, flags); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 952 | list_del(&lu->lu_list); |
Stefan Richter | 261b5f6 | 2007-08-11 11:52:08 +0200 | [diff] [blame] | 953 | write_unlock_irqrestore(&sbp2_hi_logical_units_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 954 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 955 | if (lu->login_response) |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 956 | dma_free_coherent(hi->host->device.parent, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 957 | sizeof(struct sbp2_login_response), |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 958 | lu->login_response, |
| 959 | lu->login_response_dma); |
| 960 | if (lu->login_orb) |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 961 | dma_free_coherent(hi->host->device.parent, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 962 | sizeof(struct sbp2_login_orb), |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 963 | lu->login_orb, |
| 964 | lu->login_orb_dma); |
| 965 | if (lu->reconnect_orb) |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 966 | dma_free_coherent(hi->host->device.parent, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | sizeof(struct sbp2_reconnect_orb), |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 968 | lu->reconnect_orb, |
| 969 | lu->reconnect_orb_dma); |
| 970 | if (lu->logout_orb) |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 971 | dma_free_coherent(hi->host->device.parent, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | sizeof(struct sbp2_logout_orb), |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 973 | lu->logout_orb, |
| 974 | lu->logout_orb_dma); |
| 975 | if (lu->query_logins_orb) |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 976 | dma_free_coherent(hi->host->device.parent, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 977 | sizeof(struct sbp2_query_logins_orb), |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 978 | lu->query_logins_orb, |
| 979 | lu->query_logins_orb_dma); |
| 980 | if (lu->query_logins_response) |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 981 | dma_free_coherent(hi->host->device.parent, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 982 | sizeof(struct sbp2_query_logins_response), |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 983 | lu->query_logins_response, |
| 984 | lu->query_logins_response_dma); |
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->status_fifo_addr != CSR1212_INVALID_ADDR_SPACE) |
Stefan Richter | 35bdddb | 2006-01-31 00:13:33 -0500 | [diff] [blame] | 987 | hpsb_unregister_addrspace(&sbp2_highlevel, hi->host, |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 988 | lu->status_fifo_addr); |
Stefan Richter | 35bdddb | 2006-01-31 00:13:33 -0500 | [diff] [blame] | 989 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 990 | lu->ud->device.driver_data = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 991 | |
Stefan Richter | a2ee3f9 | 2007-08-11 11:51:16 +0200 | [diff] [blame] | 992 | module_put(hi->host->driver->owner); |
| 993 | no_hi: |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 994 | kfree(lu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 995 | } |
| 996 | |
| 997 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA |
| 998 | /* |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 999 | * Deal with write requests on adapters which do not support physical DMA or |
| 1000 | * have it switched off. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1001 | */ |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1002 | static int sbp2_handle_physdma_write(struct hpsb_host *host, int nodeid, |
| 1003 | int destid, quadlet_t *data, u64 addr, |
| 1004 | size_t length, u16 flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1005 | { |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1006 | memcpy(bus_to_virt((u32) addr), data, length); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1007 | return RCODE_COMPLETE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1008 | } |
| 1009 | |
| 1010 | /* |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1011 | * Deal with read requests on adapters which do not support physical DMA or |
| 1012 | * have it switched off. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1013 | */ |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1014 | static int sbp2_handle_physdma_read(struct hpsb_host *host, int nodeid, |
| 1015 | quadlet_t *data, u64 addr, size_t length, |
| 1016 | u16 flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1017 | { |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1018 | memcpy(data, bus_to_virt((u32) addr), length); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1019 | return RCODE_COMPLETE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | } |
| 1021 | #endif |
| 1022 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1023 | /************************************** |
| 1024 | * SBP-2 protocol related section |
| 1025 | **************************************/ |
| 1026 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1027 | static int sbp2_query_logins(struct sbp2_lu *lu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1028 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1029 | struct sbp2_fwhost_info *hi = lu->hi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1030 | quadlet_t data[2]; |
| 1031 | int max_logins; |
| 1032 | int active_logins; |
| 1033 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1034 | lu->query_logins_orb->reserved1 = 0x0; |
| 1035 | lu->query_logins_orb->reserved2 = 0x0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1036 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1037 | lu->query_logins_orb->query_response_lo = lu->query_logins_response_dma; |
| 1038 | lu->query_logins_orb->query_response_hi = |
| 1039 | ORB_SET_NODE_ID(hi->host->node_id); |
| 1040 | lu->query_logins_orb->lun_misc = |
| 1041 | ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST); |
| 1042 | lu->query_logins_orb->lun_misc |= ORB_SET_NOTIFY(1); |
| 1043 | lu->query_logins_orb->lun_misc |= ORB_SET_LUN(lu->lun); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1044 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1045 | lu->query_logins_orb->reserved_resp_length = |
| 1046 | ORB_SET_QUERY_LOGINS_RESP_LENGTH( |
| 1047 | sizeof(struct sbp2_query_logins_response)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1048 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1049 | lu->query_logins_orb->status_fifo_hi = |
| 1050 | ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id); |
| 1051 | lu->query_logins_orb->status_fifo_lo = |
| 1052 | ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1053 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1054 | sbp2util_cpu_to_be32_buffer(lu->query_logins_orb, |
| 1055 | sizeof(struct sbp2_query_logins_orb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1056 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1057 | memset(lu->query_logins_response, 0, |
| 1058 | sizeof(struct sbp2_query_logins_response)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1059 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1060 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1061 | data[1] = lu->query_logins_orb_dma; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1062 | sbp2util_cpu_to_be32_buffer(data, 8); |
| 1063 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1064 | hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1065 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1066 | if (sbp2util_access_timeout(lu, 2*HZ)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | SBP2_INFO("Error querying logins to SBP-2 device - timed out"); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1068 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1069 | } |
| 1070 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1071 | if (lu->status_block.ORB_offset_lo != lu->query_logins_orb_dma) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1072 | SBP2_INFO("Error querying logins to SBP-2 device - timed out"); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1073 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1074 | } |
| 1075 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1076 | if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) { |
Stefan Richter | 6065772 | 2006-07-23 22:18:00 +0200 | [diff] [blame] | 1077 | SBP2_INFO("Error querying logins to SBP-2 device - failed"); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1078 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1079 | } |
| 1080 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1081 | sbp2util_cpu_to_be32_buffer(lu->query_logins_response, |
| 1082 | sizeof(struct sbp2_query_logins_response)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1083 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1084 | max_logins = RESPONSE_GET_MAX_LOGINS( |
| 1085 | lu->query_logins_response->length_max_logins); |
Ben Collins | 20f4578 | 2006-06-12 18:13:11 -0400 | [diff] [blame] | 1086 | SBP2_INFO("Maximum concurrent logins supported: %d", max_logins); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1087 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1088 | active_logins = RESPONSE_GET_ACTIVE_LOGINS( |
| 1089 | lu->query_logins_response->length_max_logins); |
Ben Collins | 20f4578 | 2006-06-12 18:13:11 -0400 | [diff] [blame] | 1090 | SBP2_INFO("Number of active logins: %d", active_logins); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | |
| 1092 | if (active_logins >= max_logins) { |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1093 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1094 | } |
| 1095 | |
| 1096 | return 0; |
| 1097 | } |
| 1098 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1099 | static int sbp2_login_device(struct sbp2_lu *lu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1100 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1101 | struct sbp2_fwhost_info *hi = lu->hi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1102 | quadlet_t data[2]; |
| 1103 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1104 | if (!lu->login_orb) |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1105 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1106 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1107 | if (!sbp2_exclusive_login && sbp2_query_logins(lu)) { |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1108 | SBP2_INFO("Device does not support any more concurrent logins"); |
| 1109 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1110 | } |
| 1111 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1112 | /* assume no password */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1113 | lu->login_orb->password_hi = 0; |
| 1114 | lu->login_orb->password_lo = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1115 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1116 | lu->login_orb->login_response_lo = lu->login_response_dma; |
| 1117 | lu->login_orb->login_response_hi = ORB_SET_NODE_ID(hi->host->node_id); |
| 1118 | lu->login_orb->lun_misc = ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST); |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1119 | |
| 1120 | /* one second reconnect time */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1121 | lu->login_orb->lun_misc |= ORB_SET_RECONNECT(0); |
| 1122 | lu->login_orb->lun_misc |= ORB_SET_EXCLUSIVE(sbp2_exclusive_login); |
| 1123 | lu->login_orb->lun_misc |= ORB_SET_NOTIFY(1); |
| 1124 | lu->login_orb->lun_misc |= ORB_SET_LUN(lu->lun); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1125 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1126 | lu->login_orb->passwd_resp_lengths = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1127 | ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1128 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1129 | lu->login_orb->status_fifo_hi = |
| 1130 | ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id); |
| 1131 | lu->login_orb->status_fifo_lo = |
| 1132 | ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1133 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1134 | sbp2util_cpu_to_be32_buffer(lu->login_orb, |
| 1135 | sizeof(struct sbp2_login_orb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1136 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1137 | memset(lu->login_response, 0, sizeof(struct sbp2_login_response)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1138 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1139 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1140 | data[1] = lu->login_orb_dma; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1141 | sbp2util_cpu_to_be32_buffer(data, 8); |
| 1142 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1143 | hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1144 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1145 | /* wait up to 20 seconds for login status */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1146 | if (sbp2util_access_timeout(lu, 20*HZ)) { |
Stefan Richter | e8398bb | 2006-07-23 22:19:00 +0200 | [diff] [blame] | 1147 | SBP2_ERR("Error logging into SBP-2 device - timed out"); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1148 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1149 | } |
| 1150 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1151 | /* make sure that the returned status matches the login ORB */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1152 | if (lu->status_block.ORB_offset_lo != lu->login_orb_dma) { |
Stefan Richter | 6065772 | 2006-07-23 22:18:00 +0200 | [diff] [blame] | 1153 | SBP2_ERR("Error logging into SBP-2 device - timed out"); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1154 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1155 | } |
| 1156 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1157 | if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) { |
Stefan Richter | 6065772 | 2006-07-23 22:18:00 +0200 | [diff] [blame] | 1158 | SBP2_ERR("Error logging into SBP-2 device - failed"); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1159 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1160 | } |
| 1161 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1162 | sbp2util_cpu_to_be32_buffer(lu->login_response, |
| 1163 | sizeof(struct sbp2_login_response)); |
| 1164 | lu->command_block_agent_addr = |
| 1165 | ((u64)lu->login_response->command_block_agent_hi) << 32; |
| 1166 | lu->command_block_agent_addr |= |
| 1167 | ((u64)lu->login_response->command_block_agent_lo); |
| 1168 | lu->command_block_agent_addr &= 0x0000ffffffffffffULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1169 | |
| 1170 | SBP2_INFO("Logged into SBP-2 device"); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1171 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1172 | } |
| 1173 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1174 | static int sbp2_logout_device(struct sbp2_lu *lu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1175 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1176 | struct sbp2_fwhost_info *hi = lu->hi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1177 | quadlet_t data[2]; |
| 1178 | int error; |
| 1179 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1180 | lu->logout_orb->reserved1 = 0x0; |
| 1181 | lu->logout_orb->reserved2 = 0x0; |
| 1182 | lu->logout_orb->reserved3 = 0x0; |
| 1183 | lu->logout_orb->reserved4 = 0x0; |
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 | lu->logout_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST); |
| 1186 | lu->logout_orb->login_ID_misc |= |
| 1187 | ORB_SET_LOGIN_ID(lu->login_response->length_login_ID); |
| 1188 | lu->logout_orb->login_ID_misc |= ORB_SET_NOTIFY(1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1189 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1190 | lu->logout_orb->reserved5 = 0x0; |
| 1191 | lu->logout_orb->status_fifo_hi = |
| 1192 | ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id); |
| 1193 | lu->logout_orb->status_fifo_lo = |
| 1194 | ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1195 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1196 | sbp2util_cpu_to_be32_buffer(lu->logout_orb, |
| 1197 | sizeof(struct sbp2_logout_orb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1198 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1199 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1200 | data[1] = lu->logout_orb_dma; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1201 | sbp2util_cpu_to_be32_buffer(data, 8); |
| 1202 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1203 | error = hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1204 | if (error) |
| 1205 | return error; |
| 1206 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1207 | /* wait up to 1 second for the device to complete logout */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1208 | if (sbp2util_access_timeout(lu, HZ)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1209 | return -EIO; |
| 1210 | |
| 1211 | SBP2_INFO("Logged out of SBP-2 device"); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1212 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1213 | } |
| 1214 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1215 | static int sbp2_reconnect_device(struct sbp2_lu *lu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1216 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1217 | struct sbp2_fwhost_info *hi = lu->hi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1218 | quadlet_t data[2]; |
| 1219 | int error; |
| 1220 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1221 | lu->reconnect_orb->reserved1 = 0x0; |
| 1222 | lu->reconnect_orb->reserved2 = 0x0; |
| 1223 | lu->reconnect_orb->reserved3 = 0x0; |
| 1224 | lu->reconnect_orb->reserved4 = 0x0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1225 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1226 | lu->reconnect_orb->login_ID_misc = |
| 1227 | ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST); |
| 1228 | lu->reconnect_orb->login_ID_misc |= |
| 1229 | ORB_SET_LOGIN_ID(lu->login_response->length_login_ID); |
| 1230 | lu->reconnect_orb->login_ID_misc |= ORB_SET_NOTIFY(1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1231 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1232 | lu->reconnect_orb->reserved5 = 0x0; |
| 1233 | lu->reconnect_orb->status_fifo_hi = |
| 1234 | ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id); |
| 1235 | lu->reconnect_orb->status_fifo_lo = |
| 1236 | ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr); |
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 | sbp2util_cpu_to_be32_buffer(lu->reconnect_orb, |
| 1239 | sizeof(struct sbp2_reconnect_orb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1240 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1241 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1242 | data[1] = lu->reconnect_orb_dma; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1243 | sbp2util_cpu_to_be32_buffer(data, 8); |
| 1244 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1245 | error = hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1246 | if (error) |
| 1247 | return error; |
| 1248 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1249 | /* wait up to 1 second for reconnect status */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1250 | if (sbp2util_access_timeout(lu, HZ)) { |
Stefan Richter | e8398bb | 2006-07-23 22:19:00 +0200 | [diff] [blame] | 1251 | SBP2_ERR("Error reconnecting to SBP-2 device - timed out"); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1252 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1253 | } |
| 1254 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1255 | /* make sure that the returned status matches the reconnect ORB */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1256 | if (lu->status_block.ORB_offset_lo != lu->reconnect_orb_dma) { |
Stefan Richter | 6065772 | 2006-07-23 22:18:00 +0200 | [diff] [blame] | 1257 | SBP2_ERR("Error reconnecting to SBP-2 device - timed out"); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1258 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1259 | } |
| 1260 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1261 | if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) { |
Stefan Richter | 6065772 | 2006-07-23 22:18:00 +0200 | [diff] [blame] | 1262 | SBP2_ERR("Error reconnecting to SBP-2 device - failed"); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1263 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1264 | } |
| 1265 | |
Stefan Richter | 3564409 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1266 | SBP2_INFO("Reconnected to SBP-2 device"); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1267 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1268 | } |
| 1269 | |
| 1270 | /* |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1271 | * Set the target node's Single Phase Retry limit. Affects the target's retry |
| 1272 | * behaviour if our node is too busy to accept requests. |
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 | static int sbp2_set_busy_timeout(struct sbp2_lu *lu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1275 | { |
| 1276 | quadlet_t data; |
| 1277 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1278 | data = cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1279 | if (hpsb_node_write(lu->ne, SBP2_BUSY_TIMEOUT_ADDRESS, &data, 4)) |
Stefan Richter | d024ebc | 2006-03-28 20:03:55 -0500 | [diff] [blame] | 1280 | SBP2_ERR("%s error", __FUNCTION__); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1281 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1282 | } |
| 1283 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1284 | static void sbp2_parse_unit_directory(struct sbp2_lu *lu, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1285 | struct unit_directory *ud) |
| 1286 | { |
| 1287 | struct csr1212_keyval *kv; |
| 1288 | struct csr1212_dentry *dentry; |
| 1289 | u64 management_agent_addr; |
Stefan Richter | 9117c6d | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1290 | u32 unit_characteristics, firmware_revision; |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 1291 | unsigned workarounds; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1292 | int i; |
| 1293 | |
Stefan Richter | 9117c6d | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1294 | management_agent_addr = 0; |
| 1295 | unit_characteristics = 0; |
| 1296 | firmware_revision = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1297 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1298 | csr1212_for_each_dir_entry(ud->ne->csr, kv, ud->ud_kv, dentry) { |
| 1299 | switch (kv->key.id) { |
| 1300 | case CSR1212_KV_ID_DEPENDENT_INFO: |
Stefan Richter | edf1fb2 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1301 | if (kv->key.type == CSR1212_KV_TYPE_CSR_OFFSET) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1302 | management_agent_addr = |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1303 | CSR1212_REGISTER_SPACE_BASE + |
| 1304 | (kv->value.csr_offset << 2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1305 | |
Stefan Richter | edf1fb2 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1306 | else if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1307 | lu->lun = ORB_SET_LUN(kv->value.immediate); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1308 | break; |
| 1309 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1310 | case SBP2_UNIT_CHARACTERISTICS_KEY: |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1311 | /* FIXME: This is ignored so far. |
| 1312 | * See SBP-2 clause 7.4.8. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1313 | unit_characteristics = kv->value.immediate; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1314 | break; |
| 1315 | |
| 1316 | case SBP2_FIRMWARE_REVISION_KEY: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1317 | firmware_revision = kv->value.immediate; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1318 | break; |
| 1319 | |
| 1320 | default: |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1321 | /* FIXME: Check for SBP2_DEVICE_TYPE_AND_LUN_KEY. |
| 1322 | * Its "ordered" bit has consequences for command ORB |
| 1323 | * 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] | 1324 | break; |
| 1325 | } |
| 1326 | } |
| 1327 | |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 1328 | workarounds = sbp2_default_workarounds; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1329 | |
Stefan Richter | 679c0cd | 2006-05-15 22:08:09 +0200 | [diff] [blame] | 1330 | if (!(workarounds & SBP2_WORKAROUND_OVERRIDE)) |
| 1331 | for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) { |
Stefan Richter | 4618fd3 | 2006-12-30 15:37:09 +0100 | [diff] [blame] | 1332 | if (sbp2_workarounds_table[i].firmware_revision != |
| 1333 | SBP2_ROM_VALUE_WILDCARD && |
Stefan Richter | 679c0cd | 2006-05-15 22:08:09 +0200 | [diff] [blame] | 1334 | sbp2_workarounds_table[i].firmware_revision != |
| 1335 | (firmware_revision & 0xffff00)) |
| 1336 | continue; |
Stefan Richter | 4618fd3 | 2006-12-30 15:37:09 +0100 | [diff] [blame] | 1337 | if (sbp2_workarounds_table[i].model_id != |
| 1338 | SBP2_ROM_VALUE_WILDCARD && |
Stefan Richter | 679c0cd | 2006-05-15 22:08:09 +0200 | [diff] [blame] | 1339 | sbp2_workarounds_table[i].model_id != ud->model_id) |
| 1340 | continue; |
| 1341 | workarounds |= sbp2_workarounds_table[i].workarounds; |
| 1342 | break; |
| 1343 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1344 | |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 1345 | if (workarounds) |
Stefan Richter | e9a1c52 | 2006-05-15 22:06:37 +0200 | [diff] [blame] | 1346 | SBP2_INFO("Workarounds for node " NODE_BUS_FMT ": 0x%x " |
| 1347 | "(firmware_revision 0x%06x, vendor_id 0x%06x," |
| 1348 | " model_id 0x%06x)", |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 1349 | NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid), |
Stefan Richter | e9a1c52 | 2006-05-15 22:06:37 +0200 | [diff] [blame] | 1350 | workarounds, firmware_revision, |
| 1351 | ud->vendor_id ? ud->vendor_id : ud->ne->vendor_id, |
| 1352 | ud->model_id); |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 1353 | |
| 1354 | /* We would need one SCSI host template for each target to adjust |
| 1355 | * max_sectors on the fly, therefore warn only. */ |
| 1356 | if (workarounds & SBP2_WORKAROUND_128K_MAX_TRANS && |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1357 | (sbp2_max_sectors * 512) > (128 * 1024)) |
Stefan Richter | 3564409 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1358 | SBP2_INFO("Node " NODE_BUS_FMT ": Bridge only supports 128KB " |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 1359 | "max transfer size. WARNING: Current max_sectors " |
| 1360 | "setting is larger than 128KB (%d sectors)", |
| 1361 | NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid), |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1362 | sbp2_max_sectors); |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 1363 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1364 | /* If this is a logical unit directory entry, process the parent |
| 1365 | * to get the values. */ |
| 1366 | if (ud->flags & UNIT_DIRECTORY_LUN_DIRECTORY) { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1367 | struct unit_directory *parent_ud = container_of( |
| 1368 | ud->device.parent, struct unit_directory, device); |
| 1369 | sbp2_parse_unit_directory(lu, parent_ud); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1370 | } else { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1371 | lu->management_agent_addr = management_agent_addr; |
| 1372 | lu->workarounds = workarounds; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1373 | if (ud->flags & UNIT_DIRECTORY_HAS_LUN) |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1374 | lu->lun = ORB_SET_LUN(ud->lun); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1375 | } |
| 1376 | } |
| 1377 | |
Ben Collins | fd23ade | 2006-06-12 18:14:14 -0400 | [diff] [blame] | 1378 | #define SBP2_PAYLOAD_TO_BYTES(p) (1 << ((p) + 2)) |
| 1379 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1380 | /* |
| 1381 | * This function is called in order to determine the max speed and packet |
| 1382 | * size we can use in our ORBs. Note, that we (the driver and host) only |
| 1383 | * initiate the transaction. The SBP-2 device actually transfers the data |
| 1384 | * (by reading from the DMA area we tell it). This means that the SBP-2 |
| 1385 | * device decides the actual maximum data it can transfer. We just tell it |
| 1386 | * the speed that it needs to use, and the max_rec the host supports, and |
| 1387 | * it takes care of the rest. |
| 1388 | */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1389 | static int sbp2_max_speed_and_size(struct sbp2_lu *lu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1390 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1391 | struct sbp2_fwhost_info *hi = lu->hi; |
Ben Collins | fd23ade | 2006-06-12 18:14:14 -0400 | [diff] [blame] | 1392 | u8 payload; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1393 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1394 | lu->speed_code = hi->host->speed[NODEID_TO_NODE(lu->ne->nodeid)]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1395 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1396 | if (lu->speed_code > sbp2_max_speed) { |
| 1397 | lu->speed_code = sbp2_max_speed; |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1398 | SBP2_INFO("Reducing speed to %s", |
| 1399 | hpsb_speedto_str[sbp2_max_speed]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1400 | } |
| 1401 | |
| 1402 | /* Payload size is the lesser of what our speed supports and what |
| 1403 | * our host supports. */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1404 | payload = min(sbp2_speedto_max_payload[lu->speed_code], |
Ben Collins | fd23ade | 2006-06-12 18:14:14 -0400 | [diff] [blame] | 1405 | (u8) (hi->host->csr.max_rec - 1)); |
| 1406 | |
| 1407 | /* If physical DMA is off, work around limitation in ohci1394: |
| 1408 | * packet size must not exceed PAGE_SIZE */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1409 | if (lu->ne->host->low_addr_space < (1ULL << 32)) |
Ben Collins | fd23ade | 2006-06-12 18:14:14 -0400 | [diff] [blame] | 1410 | while (SBP2_PAYLOAD_TO_BYTES(payload) + 24 > PAGE_SIZE && |
| 1411 | payload) |
| 1412 | payload--; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1413 | |
Stefan Richter | 3564409 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1414 | SBP2_INFO("Node " NODE_BUS_FMT ": Max speed [%s] - Max payload [%u]", |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1415 | NODE_BUS_ARGS(hi->host, lu->ne->nodeid), |
| 1416 | hpsb_speedto_str[lu->speed_code], |
Stefan Richter | 3564409 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1417 | SBP2_PAYLOAD_TO_BYTES(payload)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1418 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1419 | lu->max_payload_size = payload; |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1420 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1421 | } |
| 1422 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1423 | static int sbp2_agent_reset(struct sbp2_lu *lu, int wait) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1424 | { |
| 1425 | quadlet_t data; |
| 1426 | u64 addr; |
| 1427 | int retval; |
Stefan Richter | cc07818 | 2006-07-23 22:12:00 +0200 | [diff] [blame] | 1428 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1429 | |
Stefan Richter | ec9b7e1 | 2006-12-07 23:23:25 +0100 | [diff] [blame] | 1430 | /* flush lu->protocol_work */ |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 1431 | if (wait) |
| 1432 | flush_scheduled_work(); |
| 1433 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1434 | data = ntohl(SBP2_AGENT_RESET_DATA); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1435 | addr = lu->command_block_agent_addr + SBP2_AGENT_RESET_OFFSET; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1436 | |
| 1437 | if (wait) |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1438 | retval = hpsb_node_write(lu->ne, addr, &data, 4); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1439 | else |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1440 | retval = sbp2util_node_write_no_wait(lu->ne, addr, &data, 4); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1441 | |
| 1442 | if (retval < 0) { |
| 1443 | SBP2_ERR("hpsb_node_write failed.\n"); |
| 1444 | return -EIO; |
| 1445 | } |
| 1446 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1447 | /* make sure that the ORB_POINTER is written on next command */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1448 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
| 1449 | lu->last_orb = NULL; |
| 1450 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1451 | |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1452 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1453 | } |
| 1454 | |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1455 | static void sbp2_prep_command_orb_sg(struct sbp2_command_orb *orb, |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1456 | struct sbp2_fwhost_info *hi, |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1457 | struct sbp2_command_info *cmd, |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1458 | unsigned int scsi_use_sg, |
Stefan Richter | 825f1df | 2007-11-04 14:59:24 +0100 | [diff] [blame] | 1459 | struct scatterlist *sg, |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1460 | u32 orb_direction, |
| 1461 | enum dma_data_direction dma_dir) |
| 1462 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1463 | cmd->dma_dir = dma_dir; |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1464 | orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); |
| 1465 | orb->misc |= ORB_SET_DIRECTION(orb_direction); |
| 1466 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1467 | /* special case if only one element (and less than 64KB in size) */ |
Stefan Richter | 5fcf500 | 2008-02-01 22:31:10 +0100 | [diff] [blame] | 1468 | if (scsi_use_sg == 1 && sg->length <= SBP2_MAX_SG_ELEMENT_LENGTH) { |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1469 | |
Stefan Richter | 5fcf500 | 2008-02-01 22:31:10 +0100 | [diff] [blame] | 1470 | cmd->dma_size = sg->length; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1471 | cmd->dma_type = CMD_DMA_PAGE; |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 1472 | cmd->cmd_dma = dma_map_page(hi->host->device.parent, |
Stefan Richter | 825f1df | 2007-11-04 14:59:24 +0100 | [diff] [blame] | 1473 | sg_page(sg), sg->offset, |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1474 | cmd->dma_size, cmd->dma_dir); |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1475 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1476 | orb->data_descriptor_lo = cmd->cmd_dma; |
| 1477 | orb->misc |= ORB_SET_DATA_SIZE(cmd->dma_size); |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1478 | |
| 1479 | } else { |
| 1480 | struct sbp2_unrestricted_page_table *sg_element = |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1481 | &cmd->scatter_gather_element[0]; |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1482 | u32 sg_count, sg_len; |
| 1483 | dma_addr_t sg_addr; |
Stefan Richter | 825f1df | 2007-11-04 14:59:24 +0100 | [diff] [blame] | 1484 | int i, count = dma_map_sg(hi->host->device.parent, sg, |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 1485 | scsi_use_sg, dma_dir); |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1486 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1487 | cmd->dma_size = scsi_use_sg; |
Stefan Richter | 825f1df | 2007-11-04 14:59:24 +0100 | [diff] [blame] | 1488 | cmd->sge_buffer = sg; |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1489 | |
| 1490 | /* use page tables (s/g) */ |
| 1491 | orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1492 | orb->data_descriptor_lo = cmd->sge_dma; |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1493 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1494 | /* loop through and fill out our SBP-2 page tables |
| 1495 | * (and split up anything too large) */ |
Stefan Richter | 825f1df | 2007-11-04 14:59:24 +0100 | [diff] [blame] | 1496 | for (i = 0, sg_count = 0; i < count; i++, sg = sg_next(sg)) { |
| 1497 | sg_len = sg_dma_len(sg); |
| 1498 | sg_addr = sg_dma_address(sg); |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1499 | while (sg_len) { |
| 1500 | sg_element[sg_count].segment_base_lo = sg_addr; |
| 1501 | if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) { |
| 1502 | sg_element[sg_count].length_segment_base_hi = |
| 1503 | PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH); |
| 1504 | sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH; |
| 1505 | sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH; |
| 1506 | } else { |
| 1507 | sg_element[sg_count].length_segment_base_hi = |
| 1508 | PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len); |
| 1509 | sg_len = 0; |
| 1510 | } |
| 1511 | sg_count++; |
| 1512 | } |
| 1513 | } |
| 1514 | |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1515 | orb->misc |= ORB_SET_DATA_SIZE(sg_count); |
| 1516 | |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1517 | sbp2util_cpu_to_be32_buffer(sg_element, |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1518 | (sizeof(struct sbp2_unrestricted_page_table)) * |
| 1519 | sg_count); |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1520 | } |
| 1521 | } |
| 1522 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1523 | static void sbp2_create_command_orb(struct sbp2_lu *lu, |
| 1524 | struct sbp2_command_info *cmd, |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1525 | unchar *scsi_cmd, |
| 1526 | unsigned int scsi_use_sg, |
| 1527 | unsigned int scsi_request_bufflen, |
Stefan Richter | 825f1df | 2007-11-04 14:59:24 +0100 | [diff] [blame] | 1528 | struct scatterlist *sg, |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1529 | enum dma_data_direction dma_dir) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1530 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1531 | struct sbp2_fwhost_info *hi = lu->hi; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1532 | struct sbp2_command_orb *orb = &cmd->command_orb; |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1533 | u32 orb_direction; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1534 | |
| 1535 | /* |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1536 | * Set-up our command ORB. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1537 | * |
| 1538 | * NOTE: We're doing unrestricted page tables (s/g), as this is |
| 1539 | * best performance (at least with the devices I have). This means |
| 1540 | * that data_size becomes the number of s/g elements, and |
| 1541 | * page_size should be zero (for unrestricted). |
| 1542 | */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1543 | orb->next_ORB_hi = ORB_SET_NULL_PTR(1); |
| 1544 | orb->next_ORB_lo = 0x0; |
| 1545 | orb->misc = ORB_SET_MAX_PAYLOAD(lu->max_payload_size); |
| 1546 | orb->misc |= ORB_SET_SPEED(lu->speed_code); |
| 1547 | orb->misc |= ORB_SET_NOTIFY(1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1548 | |
Stefan Richter | 43863eb | 2005-12-12 23:03:24 -0500 | [diff] [blame] | 1549 | if (dma_dir == DMA_NONE) |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1550 | orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER; |
Stefan Richter | 43863eb | 2005-12-12 23:03:24 -0500 | [diff] [blame] | 1551 | else if (dma_dir == DMA_TO_DEVICE && scsi_request_bufflen) |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1552 | orb_direction = ORB_DIRECTION_WRITE_TO_MEDIA; |
Stefan Richter | 43863eb | 2005-12-12 23:03:24 -0500 | [diff] [blame] | 1553 | else if (dma_dir == DMA_FROM_DEVICE && scsi_request_bufflen) |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1554 | orb_direction = ORB_DIRECTION_READ_FROM_MEDIA; |
Stefan Richter | 43863eb | 2005-12-12 23:03:24 -0500 | [diff] [blame] | 1555 | else { |
Stefan Richter | 3564409 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1556 | SBP2_INFO("Falling back to DMA_NONE"); |
Stefan Richter | 43863eb | 2005-12-12 23:03:24 -0500 | [diff] [blame] | 1557 | orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1558 | } |
| 1559 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1560 | /* set up our page table stuff */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1561 | if (orb_direction == ORB_DIRECTION_NO_DATA_TRANSFER) { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1562 | orb->data_descriptor_hi = 0x0; |
| 1563 | orb->data_descriptor_lo = 0x0; |
| 1564 | orb->misc |= ORB_SET_DIRECTION(1); |
FUJITA Tomonori | d7dea2c | 2007-05-14 20:00:04 +0900 | [diff] [blame] | 1565 | } else |
Stefan Richter | 825f1df | 2007-11-04 14:59:24 +0100 | [diff] [blame] | 1566 | sbp2_prep_command_orb_sg(orb, hi, cmd, scsi_use_sg, sg, |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1567 | orb_direction, dma_dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1568 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1569 | sbp2util_cpu_to_be32_buffer(orb, sizeof(*orb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1570 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1571 | memset(orb->cdb, 0, 12); |
| 1572 | memcpy(orb->cdb, scsi_cmd, COMMAND_SIZE(*scsi_cmd)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1573 | } |
| 1574 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1575 | static void sbp2_link_orb_command(struct sbp2_lu *lu, |
| 1576 | struct sbp2_command_info *cmd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1577 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1578 | struct sbp2_fwhost_info *hi = lu->hi; |
Stefan Richter | cc07818 | 2006-07-23 22:12:00 +0200 | [diff] [blame] | 1579 | struct sbp2_command_orb *last_orb; |
| 1580 | dma_addr_t last_orb_dma; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1581 | u64 addr = lu->command_block_agent_addr; |
Stefan Richter | cc07818 | 2006-07-23 22:12:00 +0200 | [diff] [blame] | 1582 | quadlet_t data[2]; |
| 1583 | size_t length; |
| 1584 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1585 | |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 1586 | dma_sync_single_for_device(hi->host->device.parent, |
| 1587 | cmd->command_orb_dma, |
Stefan Richter | 9b7d9c0 | 2006-11-22 21:44:34 +0100 | [diff] [blame] | 1588 | sizeof(struct sbp2_command_orb), |
| 1589 | DMA_TO_DEVICE); |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 1590 | dma_sync_single_for_device(hi->host->device.parent, cmd->sge_dma, |
Stefan Richter | 9b7d9c0 | 2006-11-22 21:44:34 +0100 | [diff] [blame] | 1591 | sizeof(cmd->scatter_gather_element), |
Stefan Richter | 2446a79 | 2007-02-04 20:54:57 +0100 | [diff] [blame] | 1592 | DMA_TO_DEVICE); |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1593 | |
| 1594 | /* check to see if there are any previous orbs to use */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1595 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
| 1596 | last_orb = lu->last_orb; |
| 1597 | last_orb_dma = lu->last_orb_dma; |
Stefan Richter | cc07818 | 2006-07-23 22:12:00 +0200 | [diff] [blame] | 1598 | if (!last_orb) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1599 | /* |
Stefan Richter | cc07818 | 2006-07-23 22:12:00 +0200 | [diff] [blame] | 1600 | * last_orb == NULL means: We know that the target's fetch agent |
| 1601 | * is not active right now. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1602 | */ |
Stefan Richter | cc07818 | 2006-07-23 22:12:00 +0200 | [diff] [blame] | 1603 | addr += SBP2_ORB_POINTER_OFFSET; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1604 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1605 | data[1] = cmd->command_orb_dma; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1606 | sbp2util_cpu_to_be32_buffer(data, 8); |
Stefan Richter | cc07818 | 2006-07-23 22:12:00 +0200 | [diff] [blame] | 1607 | length = 8; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1608 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1609 | /* |
Stefan Richter | cc07818 | 2006-07-23 22:12:00 +0200 | [diff] [blame] | 1610 | * last_orb != NULL means: We know that the target's fetch agent |
| 1611 | * is (very probably) not dead or in reset state right now. |
| 1612 | * We have an ORB already sent that we can append a new one to. |
| 1613 | * The target's fetch agent may or may not have read this |
| 1614 | * previous ORB yet. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1615 | */ |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 1616 | dma_sync_single_for_cpu(hi->host->device.parent, last_orb_dma, |
Stefan Richter | 9b7d9c0 | 2006-11-22 21:44:34 +0100 | [diff] [blame] | 1617 | sizeof(struct sbp2_command_orb), |
| 1618 | DMA_TO_DEVICE); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1619 | last_orb->next_ORB_lo = cpu_to_be32(cmd->command_orb_dma); |
Stefan Richter | cc07818 | 2006-07-23 22:12:00 +0200 | [diff] [blame] | 1620 | wmb(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1621 | /* Tells hardware that this pointer is valid */ |
Stefan Richter | cc07818 | 2006-07-23 22:12:00 +0200 | [diff] [blame] | 1622 | last_orb->next_ORB_hi = 0; |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 1623 | dma_sync_single_for_device(hi->host->device.parent, |
| 1624 | last_orb_dma, |
Stefan Richter | 9b7d9c0 | 2006-11-22 21:44:34 +0100 | [diff] [blame] | 1625 | sizeof(struct sbp2_command_orb), |
| 1626 | DMA_TO_DEVICE); |
Stefan Richter | cc07818 | 2006-07-23 22:12:00 +0200 | [diff] [blame] | 1627 | addr += SBP2_DOORBELL_OFFSET; |
| 1628 | data[0] = 0; |
| 1629 | length = 4; |
| 1630 | } |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1631 | lu->last_orb = &cmd->command_orb; |
| 1632 | lu->last_orb_dma = cmd->command_orb_dma; |
| 1633 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1634 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1635 | if (sbp2util_node_write_no_wait(lu->ne, addr, data, length)) { |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 1636 | /* |
| 1637 | * sbp2util_node_write_no_wait failed. We certainly ran out |
| 1638 | * of transaction labels, perhaps just because there were no |
| 1639 | * context switches which gave khpsbpkt a chance to collect |
| 1640 | * free tlabels. Try again in non-atomic context. If necessary, |
| 1641 | * the workqueue job will sleep to guaranteedly get a tlabel. |
| 1642 | * We do not accept new commands until the job is over. |
| 1643 | */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1644 | scsi_block_requests(lu->shost); |
| 1645 | PREPARE_WORK(&lu->protocol_work, |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 1646 | last_orb ? sbp2util_write_doorbell: |
Stefan Richter | ec9b7e1 | 2006-12-07 23:23:25 +0100 | [diff] [blame] | 1647 | sbp2util_write_orb_pointer); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1648 | schedule_work(&lu->protocol_work); |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 1649 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1650 | } |
| 1651 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1652 | 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] | 1653 | void (*done)(struct scsi_cmnd *)) |
| 1654 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1655 | unchar *scsi_cmd = (unchar *)SCpnt->cmnd; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1656 | struct sbp2_command_info *cmd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1657 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1658 | cmd = sbp2util_allocate_command_orb(lu, SCpnt, done); |
| 1659 | if (!cmd) |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1660 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1661 | |
FUJITA Tomonori | d7dea2c | 2007-05-14 20:00:04 +0900 | [diff] [blame] | 1662 | sbp2_create_command_orb(lu, cmd, scsi_cmd, scsi_sg_count(SCpnt), |
Stefan Richter | 825f1df | 2007-11-04 14:59:24 +0100 | [diff] [blame] | 1663 | scsi_bufflen(SCpnt), scsi_sglist(SCpnt), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1664 | SCpnt->sc_data_direction); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1665 | sbp2_link_orb_command(lu, cmd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1666 | |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1667 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1668 | } |
| 1669 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1670 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1671 | * Translates SBP-2 status into SCSI sense data for check conditions |
| 1672 | */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1673 | static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status, |
| 1674 | unchar *sense_data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1675 | { |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1676 | /* OK, it's pretty ugly... ;-) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1677 | sense_data[0] = 0x70; |
| 1678 | sense_data[1] = 0x0; |
| 1679 | sense_data[2] = sbp2_status[9]; |
| 1680 | sense_data[3] = sbp2_status[12]; |
| 1681 | sense_data[4] = sbp2_status[13]; |
| 1682 | sense_data[5] = sbp2_status[14]; |
| 1683 | sense_data[6] = sbp2_status[15]; |
| 1684 | sense_data[7] = 10; |
| 1685 | sense_data[8] = sbp2_status[16]; |
| 1686 | sense_data[9] = sbp2_status[17]; |
| 1687 | sense_data[10] = sbp2_status[18]; |
| 1688 | sense_data[11] = sbp2_status[19]; |
| 1689 | sense_data[12] = sbp2_status[10]; |
| 1690 | sense_data[13] = sbp2_status[11]; |
| 1691 | sense_data[14] = sbp2_status[20]; |
| 1692 | sense_data[15] = sbp2_status[21]; |
| 1693 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1694 | return sbp2_status[8] & 0x3f; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1695 | } |
| 1696 | |
Stefan Richter | 3e98eab4 | 2006-07-23 22:16:00 +0200 | [diff] [blame] | 1697 | static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid, |
| 1698 | int destid, quadlet_t *data, u64 addr, |
| 1699 | size_t length, u16 fl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1700 | { |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1701 | struct sbp2_fwhost_info *hi; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1702 | struct sbp2_lu *lu = NULL, *lu_tmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1703 | struct scsi_cmnd *SCpnt = NULL; |
Stefan Richter | 3e98eab4 | 2006-07-23 22:16:00 +0200 | [diff] [blame] | 1704 | struct sbp2_status_block *sb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1705 | u32 scsi_status = SBP2_SCSI_STATUS_GOOD; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1706 | struct sbp2_command_info *cmd; |
Jody McIntyre | 7945619 | 2005-11-07 06:29:39 -0500 | [diff] [blame] | 1707 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1708 | |
Stefan Richter | 6065772 | 2006-07-23 22:18:00 +0200 | [diff] [blame] | 1709 | if (unlikely(length < 8 || length > sizeof(struct sbp2_status_block))) { |
| 1710 | SBP2_ERR("Wrong size of status block"); |
| 1711 | return RCODE_ADDRESS_ERROR; |
| 1712 | } |
| 1713 | if (unlikely(!host)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1714 | SBP2_ERR("host is NULL - this is bad!"); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1715 | return RCODE_ADDRESS_ERROR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1716 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1717 | hi = hpsb_get_hostinfo(&sbp2_highlevel, host); |
Stefan Richter | 6065772 | 2006-07-23 22:18:00 +0200 | [diff] [blame] | 1718 | if (unlikely(!hi)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1719 | SBP2_ERR("host info is NULL - this is bad!"); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1720 | return RCODE_ADDRESS_ERROR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1721 | } |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1722 | |
| 1723 | /* Find the unit which wrote the status. */ |
Stefan Richter | 261b5f6 | 2007-08-11 11:52:08 +0200 | [diff] [blame] | 1724 | read_lock_irqsave(&sbp2_hi_logical_units_lock, flags); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1725 | list_for_each_entry(lu_tmp, &hi->logical_units, lu_list) { |
| 1726 | if (lu_tmp->ne->nodeid == nodeid && |
| 1727 | lu_tmp->status_fifo_addr == addr) { |
| 1728 | lu = lu_tmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1729 | break; |
| 1730 | } |
| 1731 | } |
Stefan Richter | 261b5f6 | 2007-08-11 11:52:08 +0200 | [diff] [blame] | 1732 | read_unlock_irqrestore(&sbp2_hi_logical_units_lock, flags); |
| 1733 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1734 | if (unlikely(!lu)) { |
| 1735 | SBP2_ERR("lu is NULL - device is gone?"); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1736 | return RCODE_ADDRESS_ERROR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1737 | } |
| 1738 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1739 | /* Put response into lu status fifo buffer. The first two bytes |
Stefan Richter | 3e98eab4 | 2006-07-23 22:16:00 +0200 | [diff] [blame] | 1740 | * come in big endian bit order. Often the target writes only a |
| 1741 | * truncated status block, minimally the first two quadlets. The rest |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1742 | * is implied to be zeros. */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1743 | sb = &lu->status_block; |
Stefan Richter | 3e98eab4 | 2006-07-23 22:16:00 +0200 | [diff] [blame] | 1744 | memset(sb->command_set_dependent, 0, sizeof(sb->command_set_dependent)); |
| 1745 | memcpy(sb, data, length); |
| 1746 | sbp2util_be32_to_cpu_buffer(sb, 8); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1747 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1748 | /* Ignore unsolicited status. Handle command ORB status. */ |
Stefan Richter | 6065772 | 2006-07-23 22:18:00 +0200 | [diff] [blame] | 1749 | if (unlikely(STATUS_GET_SRC(sb->ORB_offset_hi_misc) == 2)) |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1750 | cmd = NULL; |
Stefan Richter | 6065772 | 2006-07-23 22:18:00 +0200 | [diff] [blame] | 1751 | else |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1752 | cmd = sbp2util_find_command_for_orb(lu, sb->ORB_offset_lo); |
| 1753 | if (cmd) { |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 1754 | dma_sync_single_for_cpu(hi->host->device.parent, |
| 1755 | cmd->command_orb_dma, |
Stefan Richter | 9b7d9c0 | 2006-11-22 21:44:34 +0100 | [diff] [blame] | 1756 | sizeof(struct sbp2_command_orb), |
| 1757 | DMA_TO_DEVICE); |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 1758 | dma_sync_single_for_cpu(hi->host->device.parent, cmd->sge_dma, |
Stefan Richter | 9b7d9c0 | 2006-11-22 21:44:34 +0100 | [diff] [blame] | 1759 | sizeof(cmd->scatter_gather_element), |
Stefan Richter | 2446a79 | 2007-02-04 20:54:57 +0100 | [diff] [blame] | 1760 | DMA_TO_DEVICE); |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1761 | /* Grab SCSI command pointers and check status. */ |
Stefan Richter | 6065772 | 2006-07-23 22:18:00 +0200 | [diff] [blame] | 1762 | /* |
| 1763 | * FIXME: If the src field in the status is 1, the ORB DMA must |
| 1764 | * not be reused until status for a subsequent ORB is received. |
| 1765 | */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1766 | SCpnt = cmd->Current_SCpnt; |
| 1767 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
| 1768 | sbp2util_mark_command_completed(lu, cmd); |
| 1769 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1770 | |
| 1771 | if (SCpnt) { |
Stefan Richter | abbca10 | 2006-08-14 18:51:00 +0200 | [diff] [blame] | 1772 | u32 h = sb->ORB_offset_hi_misc; |
| 1773 | u32 r = STATUS_GET_RESP(h); |
| 1774 | |
| 1775 | if (r != RESP_STATUS_REQUEST_COMPLETE) { |
Stefan Richter | 3564409 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1776 | SBP2_INFO("resp 0x%x, sbp_status 0x%x", |
Stefan Richter | abbca10 | 2006-08-14 18:51:00 +0200 | [diff] [blame] | 1777 | r, STATUS_GET_SBP_STATUS(h)); |
Stefan Richter | 6065772 | 2006-07-23 22:18:00 +0200 | [diff] [blame] | 1778 | scsi_status = |
Stefan Richter | abbca10 | 2006-08-14 18:51:00 +0200 | [diff] [blame] | 1779 | r == RESP_STATUS_TRANSPORT_FAILURE ? |
| 1780 | SBP2_SCSI_STATUS_BUSY : |
Stefan Richter | 6065772 | 2006-07-23 22:18:00 +0200 | [diff] [blame] | 1781 | SBP2_SCSI_STATUS_COMMAND_TERMINATED; |
Stefan Richter | abbca10 | 2006-08-14 18:51:00 +0200 | [diff] [blame] | 1782 | } |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1783 | |
Stefan Richter | edf1fb2 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1784 | if (STATUS_GET_LEN(h) > 1) |
Stefan Richter | 3e98eab4 | 2006-07-23 22:16:00 +0200 | [diff] [blame] | 1785 | scsi_status = sbp2_status_to_sense_data( |
| 1786 | (unchar *)sb, SCpnt->sense_buffer); |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1787 | |
Stefan Richter | edf1fb2 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1788 | if (STATUS_TEST_DEAD(h)) |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1789 | sbp2_agent_reset(lu, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1790 | } |
| 1791 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1792 | /* 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] | 1793 | * are none, we know that the fetch agent left the active state |
| 1794 | * _and_ that we did not reactivate it yet. Therefore clear |
| 1795 | * last_orb so that next time we write directly to the |
| 1796 | * ORB_POINTER register. That way the fetch agent does not need |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1797 | * to refetch the next_ORB. */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1798 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
| 1799 | if (list_empty(&lu->cmd_orb_inuse)) |
| 1800 | lu->last_orb = NULL; |
| 1801 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1802 | |
| 1803 | } else { |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1804 | /* It's probably status after a management request. */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1805 | if ((sb->ORB_offset_lo == lu->reconnect_orb_dma) || |
| 1806 | (sb->ORB_offset_lo == lu->login_orb_dma) || |
| 1807 | (sb->ORB_offset_lo == lu->query_logins_orb_dma) || |
| 1808 | (sb->ORB_offset_lo == lu->logout_orb_dma)) { |
| 1809 | lu->access_complete = 1; |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1810 | wake_up_interruptible(&sbp2_access_wq); |
Stefan Richter | e8398bb | 2006-07-23 22:19:00 +0200 | [diff] [blame] | 1811 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1812 | } |
| 1813 | |
Stefan Richter | edf1fb2 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1814 | if (SCpnt) |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1815 | sbp2scsi_complete_command(lu, scsi_status, SCpnt, |
| 1816 | cmd->Current_done); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1817 | return RCODE_COMPLETE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1818 | } |
| 1819 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1820 | /************************************** |
| 1821 | * SCSI interface related section |
| 1822 | **************************************/ |
| 1823 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1824 | static int sbp2scsi_queuecommand(struct scsi_cmnd *SCpnt, |
| 1825 | void (*done)(struct scsi_cmnd *)) |
| 1826 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1827 | struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0]; |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1828 | struct sbp2_fwhost_info *hi; |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 1829 | int result = DID_NO_CONNECT << 16; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1830 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1831 | if (unlikely(!sbp2util_node_is_available(lu))) |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 1832 | goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1833 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1834 | hi = lu->hi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1835 | |
Stefan Richter | 5796aa7 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1836 | if (unlikely(!hi)) { |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1837 | SBP2_ERR("sbp2_fwhost_info is NULL - this is bad!"); |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 1838 | goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1839 | } |
| 1840 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1841 | /* Multiple units are currently represented to the SCSI core as separate |
| 1842 | * targets, not as one target with multiple LUs. Therefore return |
| 1843 | * selection time-out to any IO directed at non-zero LUNs. */ |
Stefan Richter | 5796aa7 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1844 | if (unlikely(SCpnt->device->lun)) |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 1845 | goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1846 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1847 | if (unlikely(!hpsb_node_entry_valid(lu->ne))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1848 | SBP2_ERR("Bus reset in progress - rejecting command"); |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 1849 | result = DID_BUS_BUSY << 16; |
| 1850 | goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1851 | } |
| 1852 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1853 | /* Bidirectional commands are not yet implemented, |
| 1854 | * and unknown transfer direction not handled. */ |
Stefan Richter | 5796aa7 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1855 | if (unlikely(SCpnt->sc_data_direction == DMA_BIDIRECTIONAL)) { |
Stefan Richter | 43863eb | 2005-12-12 23:03:24 -0500 | [diff] [blame] | 1856 | SBP2_ERR("Cannot handle DMA_BIDIRECTIONAL - rejecting command"); |
| 1857 | result = DID_ERROR << 16; |
| 1858 | goto done; |
| 1859 | } |
| 1860 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1861 | if (sbp2_send_command(lu, SCpnt, done)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1862 | SBP2_ERR("Error sending SCSI command"); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1863 | sbp2scsi_complete_command(lu, |
| 1864 | SBP2_SCSI_STATUS_SELECTION_TIMEOUT, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1865 | SCpnt, done); |
| 1866 | } |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 1867 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1868 | |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 1869 | done: |
| 1870 | SCpnt->result = result; |
| 1871 | done(SCpnt); |
| 1872 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1873 | } |
| 1874 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1875 | static void sbp2scsi_complete_all_commands(struct sbp2_lu *lu, u32 status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1876 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1877 | struct sbp2_fwhost_info *hi = lu->hi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1878 | struct list_head *lh; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1879 | struct sbp2_command_info *cmd; |
Jody McIntyre | 7945619 | 2005-11-07 06:29:39 -0500 | [diff] [blame] | 1880 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1881 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1882 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
| 1883 | while (!list_empty(&lu->cmd_orb_inuse)) { |
| 1884 | lh = lu->cmd_orb_inuse.next; |
| 1885 | cmd = list_entry(lh, struct sbp2_command_info, list); |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 1886 | dma_sync_single_for_cpu(hi->host->device.parent, |
| 1887 | cmd->command_orb_dma, |
Stefan Richter | 9b7d9c0 | 2006-11-22 21:44:34 +0100 | [diff] [blame] | 1888 | sizeof(struct sbp2_command_orb), |
| 1889 | DMA_TO_DEVICE); |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 1890 | dma_sync_single_for_cpu(hi->host->device.parent, cmd->sge_dma, |
Stefan Richter | 9b7d9c0 | 2006-11-22 21:44:34 +0100 | [diff] [blame] | 1891 | sizeof(cmd->scatter_gather_element), |
Stefan Richter | 2446a79 | 2007-02-04 20:54:57 +0100 | [diff] [blame] | 1892 | DMA_TO_DEVICE); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1893 | sbp2util_mark_command_completed(lu, cmd); |
| 1894 | if (cmd->Current_SCpnt) { |
| 1895 | cmd->Current_SCpnt->result = status << 16; |
| 1896 | cmd->Current_done(cmd->Current_SCpnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1897 | } |
| 1898 | } |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1899 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1900 | |
| 1901 | return; |
| 1902 | } |
| 1903 | |
| 1904 | /* |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1905 | * Complete a regular SCSI command. Can be called in atomic context. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1906 | */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1907 | static void sbp2scsi_complete_command(struct sbp2_lu *lu, u32 scsi_status, |
| 1908 | struct scsi_cmnd *SCpnt, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1909 | void (*done)(struct scsi_cmnd *)) |
| 1910 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1911 | if (!SCpnt) { |
| 1912 | SBP2_ERR("SCpnt is NULL"); |
| 1913 | return; |
| 1914 | } |
| 1915 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1916 | switch (scsi_status) { |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1917 | case SBP2_SCSI_STATUS_GOOD: |
Stefan Richter | 8f0525f | 2006-03-28 20:03:45 -0500 | [diff] [blame] | 1918 | SCpnt->result = DID_OK << 16; |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1919 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1920 | |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1921 | case SBP2_SCSI_STATUS_BUSY: |
| 1922 | SBP2_ERR("SBP2_SCSI_STATUS_BUSY"); |
| 1923 | SCpnt->result = DID_BUS_BUSY << 16; |
| 1924 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1925 | |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1926 | case SBP2_SCSI_STATUS_CHECK_CONDITION: |
Stefan Richter | 8f0525f | 2006-03-28 20:03:45 -0500 | [diff] [blame] | 1927 | SCpnt->result = CHECK_CONDITION << 1 | 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_SELECTION_TIMEOUT: |
| 1931 | SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT"); |
| 1932 | SCpnt->result = DID_NO_CONNECT << 16; |
| 1933 | scsi_print_command(SCpnt); |
| 1934 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1935 | |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1936 | case SBP2_SCSI_STATUS_CONDITION_MET: |
| 1937 | case SBP2_SCSI_STATUS_RESERVATION_CONFLICT: |
| 1938 | case SBP2_SCSI_STATUS_COMMAND_TERMINATED: |
| 1939 | SBP2_ERR("Bad SCSI status = %x", scsi_status); |
| 1940 | SCpnt->result = DID_ERROR << 16; |
| 1941 | scsi_print_command(SCpnt); |
| 1942 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1943 | |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1944 | default: |
| 1945 | SBP2_ERR("Unsupported SCSI status = %x", scsi_status); |
| 1946 | SCpnt->result = DID_ERROR << 16; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1947 | } |
| 1948 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1949 | /* If a bus reset is in progress and there was an error, complete |
| 1950 | * the command as busy so that it will get retried. */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1951 | if (!hpsb_node_entry_valid(lu->ne) |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1952 | && (scsi_status != SBP2_SCSI_STATUS_GOOD)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1953 | SBP2_ERR("Completing command with busy (bus reset)"); |
| 1954 | SCpnt->result = DID_BUS_BUSY << 16; |
| 1955 | } |
| 1956 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1957 | /* Tell the SCSI stack that we're done with this command. */ |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1958 | done(SCpnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1959 | } |
| 1960 | |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 1961 | static int sbp2scsi_slave_alloc(struct scsi_device *sdev) |
| 1962 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1963 | struct sbp2_lu *lu = (struct sbp2_lu *)sdev->host->hostdata[0]; |
Stefan Richter | a80614d | 2006-02-14 22:04:19 -0500 | [diff] [blame] | 1964 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1965 | lu->sdev = sdev; |
Stefan Richter | c394f1e | 2006-08-07 20:48:00 +0200 | [diff] [blame] | 1966 | sdev->allow_restart = 1; |
Stefan Richter | a80614d | 2006-02-14 22:04:19 -0500 | [diff] [blame] | 1967 | |
James Bottomley | 465ff31 | 2008-01-01 10:00:10 -0600 | [diff] [blame] | 1968 | /* |
| 1969 | * Update the dma alignment (minimum alignment requirements for |
| 1970 | * start and end of DMA transfers) to be a sector |
| 1971 | */ |
| 1972 | blk_queue_update_dma_alignment(sdev->request_queue, 511); |
| 1973 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1974 | if (lu->workarounds & SBP2_WORKAROUND_INQUIRY_36) |
Stefan Richter | a80614d | 2006-02-14 22:04:19 -0500 | [diff] [blame] | 1975 | sdev->inquiry_len = 36; |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 1976 | return 0; |
| 1977 | } |
| 1978 | |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 1979 | static int sbp2scsi_slave_configure(struct scsi_device *sdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1980 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1981 | struct sbp2_lu *lu = (struct sbp2_lu *)sdev->host->hostdata[0]; |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 1982 | |
Ben Collins | 365c786 | 2005-11-07 06:31:24 -0500 | [diff] [blame] | 1983 | sdev->use_10_for_rw = 1; |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 1984 | |
Stefan Richter | 1a74bc6 | 2007-01-10 20:17:15 +0100 | [diff] [blame] | 1985 | if (sdev->type == TYPE_ROM) |
| 1986 | sdev->use_10_for_ms = 1; |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 1987 | if (sdev->type == TYPE_DISK && |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1988 | lu->workarounds & SBP2_WORKAROUND_MODE_SENSE_8) |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 1989 | sdev->skip_ms_page_8 = 1; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1990 | if (lu->workarounds & SBP2_WORKAROUND_FIX_CAPACITY) |
Stefan Richter | e9a1c52 | 2006-05-15 22:06:37 +0200 | [diff] [blame] | 1991 | sdev->fix_capacity = 1; |
Stefan Richter | 4e6343a | 2007-12-16 17:31:26 +0100 | [diff] [blame] | 1992 | if (lu->workarounds & SBP2_WORKAROUND_128K_MAX_TRANS) |
| 1993 | blk_queue_max_sectors(sdev->request_queue, 128 * 1024 / 512); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1994 | return 0; |
| 1995 | } |
| 1996 | |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 1997 | static void sbp2scsi_slave_destroy(struct scsi_device *sdev) |
| 1998 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1999 | ((struct sbp2_lu *)sdev->host->hostdata[0])->sdev = NULL; |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 2000 | return; |
| 2001 | } |
| 2002 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2003 | /* |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2004 | * Called by scsi stack when something has really gone wrong. |
| 2005 | * Usually called when a command has timed-out for some reason. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2006 | */ |
| 2007 | static int sbp2scsi_abort(struct scsi_cmnd *SCpnt) |
| 2008 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2009 | struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0]; |
| 2010 | struct sbp2_fwhost_info *hi = lu->hi; |
| 2011 | struct sbp2_command_info *cmd; |
Stefan Richter | 24c7cd0 | 2006-04-01 21:11:41 +0200 | [diff] [blame] | 2012 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2013 | |
Stefan Richter | 3564409 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2014 | SBP2_INFO("aborting sbp2 command"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2015 | scsi_print_command(SCpnt); |
| 2016 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2017 | if (sbp2util_node_is_available(lu)) { |
| 2018 | sbp2_agent_reset(lu, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2019 | |
Stefan Richter | 23077f1 | 2006-09-11 20:17:14 +0200 | [diff] [blame] | 2020 | /* Return a matching command structure to the free pool. */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2021 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
| 2022 | cmd = sbp2util_find_command_for_SCpnt(lu, SCpnt); |
| 2023 | if (cmd) { |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 2024 | dma_sync_single_for_cpu(hi->host->device.parent, |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2025 | cmd->command_orb_dma, |
| 2026 | sizeof(struct sbp2_command_orb), |
Stefan Richter | 9b7d9c0 | 2006-11-22 21:44:34 +0100 | [diff] [blame] | 2027 | DMA_TO_DEVICE); |
Stefan Richter | 97d552e | 2006-12-29 23:47:04 +0100 | [diff] [blame] | 2028 | dma_sync_single_for_cpu(hi->host->device.parent, |
| 2029 | cmd->sge_dma, |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2030 | sizeof(cmd->scatter_gather_element), |
Stefan Richter | 2446a79 | 2007-02-04 20:54:57 +0100 | [diff] [blame] | 2031 | DMA_TO_DEVICE); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2032 | sbp2util_mark_command_completed(lu, cmd); |
| 2033 | if (cmd->Current_SCpnt) { |
| 2034 | cmd->Current_SCpnt->result = DID_ABORT << 16; |
| 2035 | cmd->Current_done(cmd->Current_SCpnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2036 | } |
| 2037 | } |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2038 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2039 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2040 | sbp2scsi_complete_all_commands(lu, DID_BUS_BUSY); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2041 | } |
| 2042 | |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 2043 | return SUCCESS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2044 | } |
| 2045 | |
| 2046 | /* |
| 2047 | * Called by scsi stack when something has really gone wrong. |
| 2048 | */ |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 2049 | static int sbp2scsi_reset(struct scsi_cmnd *SCpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2050 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2051 | struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2052 | |
Stefan Richter | 3564409 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2053 | SBP2_INFO("reset requested"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2054 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2055 | if (sbp2util_node_is_available(lu)) { |
Stefan Richter | 3564409 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2056 | SBP2_INFO("generating sbp2 fetch agent reset"); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2057 | sbp2_agent_reset(lu, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2058 | } |
| 2059 | |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 2060 | return SUCCESS; |
Jeff Garzik | 94d0e7b8 | 2005-05-28 07:55:48 -0400 | [diff] [blame] | 2061 | } |
| 2062 | |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 2063 | static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev, |
| 2064 | struct device_attribute *attr, |
| 2065 | char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2066 | { |
| 2067 | struct scsi_device *sdev; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2068 | struct sbp2_lu *lu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2069 | |
| 2070 | if (!(sdev = to_scsi_device(dev))) |
| 2071 | return 0; |
| 2072 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2073 | if (!(lu = (struct sbp2_lu *)sdev->host->hostdata[0])) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2074 | return 0; |
| 2075 | |
Stefan Richter | d7794c8 | 2007-05-27 13:17:15 +0200 | [diff] [blame] | 2076 | if (sbp2_long_sysfs_ieee1394_id) |
| 2077 | return sprintf(buf, "%016Lx:%06x:%04x\n", |
| 2078 | (unsigned long long)lu->ne->guid, |
| 2079 | lu->ud->directory_id, ORB_SET_LUN(lu->lun)); |
| 2080 | else |
| 2081 | return sprintf(buf, "%016Lx:%d:%d\n", |
| 2082 | (unsigned long long)lu->ne->guid, |
| 2083 | lu->ud->id, ORB_SET_LUN(lu->lun)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2084 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2085 | |
| 2086 | MODULE_AUTHOR("Ben Collins <bcollins@debian.org>"); |
| 2087 | MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver"); |
| 2088 | MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME); |
| 2089 | MODULE_LICENSE("GPL"); |
| 2090 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2091 | static int sbp2_module_init(void) |
| 2092 | { |
| 2093 | int ret; |
| 2094 | |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2095 | if (sbp2_serialize_io) { |
| 2096 | sbp2_shost_template.can_queue = 1; |
| 2097 | sbp2_shost_template.cmd_per_lun = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2098 | } |
| 2099 | |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2100 | sbp2_shost_template.max_sectors = sbp2_max_sectors; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2101 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2102 | hpsb_register_highlevel(&sbp2_highlevel); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2103 | ret = hpsb_register_protocol(&sbp2_driver); |
| 2104 | if (ret) { |
| 2105 | SBP2_ERR("Failed to register protocol"); |
| 2106 | hpsb_unregister_highlevel(&sbp2_highlevel); |
| 2107 | return ret; |
| 2108 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2109 | return 0; |
| 2110 | } |
| 2111 | |
| 2112 | static void __exit sbp2_module_exit(void) |
| 2113 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2114 | hpsb_unregister_protocol(&sbp2_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2115 | hpsb_unregister_highlevel(&sbp2_highlevel); |
| 2116 | } |
| 2117 | |
| 2118 | module_init(sbp2_module_init); |
| 2119 | module_exit(sbp2_module_exit); |