From 87ae9afdcada236d0a1b38ce2c465a65916961dc Mon Sep 17 00:00:00 2001 From: Adrian Bunk Date: Tue, 30 Oct 2007 10:35:04 +0100 Subject: cleanup asm/scatterlist.h includes Not architecture specific code should not #include . This patch therefore either replaces them with #include or simply removes them if they were unused. Signed-off-by: Adrian Bunk Signed-off-by: Jens Axboe --- include/scsi/libsas.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/scsi') diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h index 8dda2d6..a466c2c 100644 --- a/include/scsi/libsas.h +++ b/include/scsi/libsas.h @@ -36,7 +36,7 @@ #include #include #include -#include +#include struct block_device; -- cgit v1.1 From a341cd0f6a0fde1f85fec9aa8f81f824ea4a3f92 Mon Sep 17 00:00:00 2001 From: Jeff Garzik Date: Mon, 29 Oct 2007 17:15:22 -0400 Subject: SCSI: add asynchronous event notification API Originally based on a patch by Kristen Carlson Accardi @ Intel. Copious input from James Bottomley. Signed-off-by: Jeff Garzik --- include/scsi/scsi_device.h | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) (limited to 'include/scsi') diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h index d5057bc..66e9058 100644 --- a/include/scsi/scsi_device.h +++ b/include/scsi/scsi_device.h @@ -46,6 +46,22 @@ enum scsi_device_state { * to the scsi lld. */ }; +enum scsi_device_event { + SDEV_EVT_MEDIA_CHANGE = 1, /* media has changed */ + + SDEV_EVT_LAST = SDEV_EVT_MEDIA_CHANGE, + SDEV_EVT_MAXBITS = SDEV_EVT_LAST + 1 +}; + +struct scsi_event { + enum scsi_device_event evt_type; + struct list_head node; + + /* put union of data structures, for non-simple event types, + * here + */ +}; + struct scsi_device { struct Scsi_Host *host; struct request_queue *request_queue; @@ -127,6 +143,10 @@ struct scsi_device { unsigned guess_capacity:1; /* READ_CAPACITY might be too high by 1 */ unsigned retry_hwerror:1; /* Retry HARDWARE_ERROR */ + DECLARE_BITMAP(supported_events, SDEV_EVT_MAXBITS); /* supported events */ + struct list_head event_list; /* asserted events */ + struct work_struct event_work; + unsigned int device_blocked; /* Device returned QUEUE_FULL. */ unsigned int max_device_blocked; /* what device_blocked counts down from */ @@ -275,6 +295,11 @@ extern int scsi_test_unit_ready(struct scsi_device *sdev, int timeout, int retries); extern int scsi_device_set_state(struct scsi_device *sdev, enum scsi_device_state state); +extern struct scsi_event *sdev_evt_alloc(enum scsi_device_event evt_type, + gfp_t gfpflags); +extern void sdev_evt_send(struct scsi_device *sdev, struct scsi_event *evt); +extern void sdev_evt_send_simple(struct scsi_device *sdev, + enum scsi_device_event evt_type, gfp_t gfpflags); extern int scsi_device_quiesce(struct scsi_device *sdev); extern void scsi_device_resume(struct scsi_device *sdev); extern void scsi_target_quiesce(struct scsi_target *); -- cgit v1.1 From 522939d45c293388e6a360210905f9230298df16 Mon Sep 17 00:00:00 2001 From: "Maciej W. Rozycki" Date: Mon, 10 Dec 2007 15:49:31 -0800 Subject: esp_scsi: fix reset cleanup spinlock recursion The esp_reset_cleanup() function is called with the host lock held and invokes starget_for_each_device() which wants to take it too. Here is a fix along the lines of shost_for_each_device()/__shost_for_each_device() adding a __starget_for_each_device() counterpart which assumes the lock has already been taken. Eventually, I think the driver should get modified so that more work is done as a softirq rather than in the interrupt context, but for now it fixes a bug that causes the spinlock debugger to fire. While at it, it fixes a small number of cosmetic problems with starget_for_each_device() too. Signed-off-by: Maciej W. Rozycki Acked-by: David S. Miller Cc: James Bottomley Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/scsi/scsi_device.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include/scsi') diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h index 66e9058..6c2d80b 100644 --- a/include/scsi/scsi_device.h +++ b/include/scsi/scsi_device.h @@ -242,6 +242,9 @@ extern struct scsi_device *__scsi_device_lookup_by_target(struct scsi_target *, uint); extern void starget_for_each_device(struct scsi_target *, void *, void (*fn)(struct scsi_device *, void *)); +extern void __starget_for_each_device(struct scsi_target *, void *, + void (*fn)(struct scsi_device *, + void *)); /* only exposed to implement shost_for_each_device */ extern struct scsi_device *__scsi_iterate_devices(struct Scsi_Host *, -- cgit v1.1 From ac40532ef0b8649e6f7f83859ea0de1c4ed08a19 Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Wed, 2 Jan 2008 17:25:34 +0100 Subject: scsi: revert "[SCSI] Get rid of scsi_cmnd->done" This reverts commit 6f5391c283d7fdcf24bf40786ea79061919d1e1d ("[SCSI] Get rid of scsi_cmnd->done") that was supposed to be a cleanup commit, but apparently it causes regressions: Bug 9370 - v2.6.24-rc2-409-g9418d5d: attempt to access beyond end of device http://bugzilla.kernel.org/show_bug.cgi?id=9370 this patch should be reintroduced in a more split-up form to make testing of it easier. Signed-off-by: Ingo Molnar Acked-by: Matthew Wilcox Cc: James Bottomley Signed-off-by: Linus Torvalds --- include/scsi/scsi_cmnd.h | 2 ++ include/scsi/scsi_driver.h | 1 - include/scsi/sd.h | 13 +++++++++++++ 3 files changed, 15 insertions(+), 1 deletion(-) (limited to 'include/scsi') diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h index 3f47e52..7613c29 100644 --- a/include/scsi/scsi_cmnd.h +++ b/include/scsi/scsi_cmnd.h @@ -34,6 +34,7 @@ struct scsi_cmnd { struct list_head list; /* scsi_cmnd participates in queue lists */ struct list_head eh_entry; /* entry for the host eh_cmd_q */ int eh_eflags; /* Used by error handlr */ + void (*done) (struct scsi_cmnd *); /* Mid-level done function */ /* * A SCSI Command is assigned a nonzero serial_number before passed @@ -121,6 +122,7 @@ extern struct scsi_cmnd *__scsi_get_command(struct Scsi_Host *, gfp_t); extern void scsi_put_command(struct scsi_cmnd *); extern void __scsi_put_command(struct Scsi_Host *, struct scsi_cmnd *, struct device *); +extern void scsi_io_completion(struct scsi_cmnd *, unsigned int); extern void scsi_finish_command(struct scsi_cmnd *cmd); extern void scsi_req_abort_cmd(struct scsi_cmnd *cmd); diff --git a/include/scsi/scsi_driver.h b/include/scsi/scsi_driver.h index 1f5ca7f..56a3047 100644 --- a/include/scsi/scsi_driver.h +++ b/include/scsi/scsi_driver.h @@ -15,7 +15,6 @@ struct scsi_driver { struct device_driver gendrv; void (*rescan)(struct device *); - int (*done)(struct scsi_cmnd *); }; #define to_scsi_driver(drv) \ container_of((drv), struct scsi_driver, gendrv) diff --git a/include/scsi/sd.h b/include/scsi/sd.h index f751331..aa1e716 100644 --- a/include/scsi/sd.h +++ b/include/scsi/sd.h @@ -47,6 +47,19 @@ struct scsi_disk { }; #define to_scsi_disk(obj) container_of(obj,struct scsi_disk,cdev) +static int sd_revalidate_disk(struct gendisk *disk); +static void sd_rw_intr(struct scsi_cmnd * SCpnt); +static int sd_probe(struct device *); +static int sd_remove(struct device *); +static void sd_shutdown(struct device *dev); +static int sd_suspend(struct device *dev, pm_message_t state); +static int sd_resume(struct device *dev); +static void sd_rescan(struct device *); +static void sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer); +static void scsi_disk_release(struct class_device *cdev); +static void sd_print_sense_hdr(struct scsi_disk *, struct scsi_sense_hdr *); +static void sd_print_result(struct scsi_disk *, int); + #define sd_printk(prefix, sdsk, fmt, a...) \ (sdsk)->disk ? \ sdev_printk(prefix, (sdsk)->device, "[%s] " fmt, \ -- cgit v1.1 From 7b3d9545f9ac8b31528dd2d6d8ec8d19922917b8 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sun, 6 Jan 2008 10:17:12 -0800 Subject: Revert "scsi: revert "[SCSI] Get rid of scsi_cmnd->done"" This reverts commit ac40532ef0b8649e6f7f83859ea0de1c4ed08a19, which gets us back the original cleanup of 6f5391c283d7fdcf24bf40786ea79061919d1e1d. It turns out that the bug that was triggered by that commit was apparently not actually triggered by that commit at all, and just the testing conditions had changed enough to make it appear to be due to it. The real problem seems to have been found by Peter Osterlund: "pktcdvd sets it [block device size] when opening the /dev/pktcdvd device, but when the drive is later opened as /dev/scd0, there is nothing that sets it back. (Btw, 40944 is possible if the disk is a CDRW that was formatted with "cdrwtool -m 10236".) The problem is that pktcdvd opens the cd device in non-blocking mode when pktsetup is run, and doesn't close it again until pktsetup -d is run. The effect is that if you meanwhile open the cd device, blkdev.c:do_open() doesn't call bd_set_size() because bdev->bd_openers is non-zero." In particular, to repeat the bug (regardless of whether commit 6f5391c283d7fdcf24bf40786ea79061919d1e1d is applied or not): " 1. Start with an empty drive. 2. pktsetup 0 /dev/scd0 3. Insert a CD containing an isofs filesystem. 4. mount /dev/pktcdvd/0 /mnt/tmp 5. umount /mnt/tmp 6. Press the eject button. 7. Insert a DVD containing a non-writable filesystem. 8. mount /dev/scd0 /mnt/tmp 9. find /mnt/tmp -type f -print0 | xargs -0 sha1sum >/dev/null 10. If the DVD contains data beyond the physical size of a CD, you get I/O errors in the terminal, and dmesg reports lots of "attempt to access beyond end of device" errors." which in turn is because the nested open after the media change won't cause the size to be set properly (because the original open still holds the block device, and we only do the bd_set_size() when we don't have other people holding the device open). The proper fix for that is probably to just do something like bdev->bd_inode->i_size = (loff_t)get_capacity(disk)<<9; in fs/block_dev.c:do_open() even for the cases where we're not the original opener (but *not* call bd_set_size(), since that will also change the block size of the device). Cc: Peter Osterlund Cc: James Bottomley Cc: Matthew Wilcox Cc: Ingo Molnar Cc: Andrew Morton Signed-off-by: Linus Torvalds --- include/scsi/scsi_cmnd.h | 2 -- include/scsi/scsi_driver.h | 1 + include/scsi/sd.h | 13 ------------- 3 files changed, 1 insertion(+), 15 deletions(-) (limited to 'include/scsi') diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h index 7613c29..3f47e52 100644 --- a/include/scsi/scsi_cmnd.h +++ b/include/scsi/scsi_cmnd.h @@ -34,7 +34,6 @@ struct scsi_cmnd { struct list_head list; /* scsi_cmnd participates in queue lists */ struct list_head eh_entry; /* entry for the host eh_cmd_q */ int eh_eflags; /* Used by error handlr */ - void (*done) (struct scsi_cmnd *); /* Mid-level done function */ /* * A SCSI Command is assigned a nonzero serial_number before passed @@ -122,7 +121,6 @@ extern struct scsi_cmnd *__scsi_get_command(struct Scsi_Host *, gfp_t); extern void scsi_put_command(struct scsi_cmnd *); extern void __scsi_put_command(struct Scsi_Host *, struct scsi_cmnd *, struct device *); -extern void scsi_io_completion(struct scsi_cmnd *, unsigned int); extern void scsi_finish_command(struct scsi_cmnd *cmd); extern void scsi_req_abort_cmd(struct scsi_cmnd *cmd); diff --git a/include/scsi/scsi_driver.h b/include/scsi/scsi_driver.h index 56a3047..1f5ca7f 100644 --- a/include/scsi/scsi_driver.h +++ b/include/scsi/scsi_driver.h @@ -15,6 +15,7 @@ struct scsi_driver { struct device_driver gendrv; void (*rescan)(struct device *); + int (*done)(struct scsi_cmnd *); }; #define to_scsi_driver(drv) \ container_of((drv), struct scsi_driver, gendrv) diff --git a/include/scsi/sd.h b/include/scsi/sd.h index aa1e716..f751331 100644 --- a/include/scsi/sd.h +++ b/include/scsi/sd.h @@ -47,19 +47,6 @@ struct scsi_disk { }; #define to_scsi_disk(obj) container_of(obj,struct scsi_disk,cdev) -static int sd_revalidate_disk(struct gendisk *disk); -static void sd_rw_intr(struct scsi_cmnd * SCpnt); -static int sd_probe(struct device *); -static int sd_remove(struct device *); -static void sd_shutdown(struct device *dev); -static int sd_suspend(struct device *dev, pm_message_t state); -static int sd_resume(struct device *dev); -static void sd_rescan(struct device *); -static void sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer); -static void scsi_disk_release(struct class_device *cdev); -static void sd_print_sense_hdr(struct scsi_disk *, struct scsi_sense_hdr *); -static void sd_print_result(struct scsi_disk *, int); - #define sd_printk(prefix, sdsk, fmt, a...) \ (sdsk)->disk ? \ sdev_printk(prefix, (sdsk)->device, "[%s] " fmt, \ -- cgit v1.1 From 285e9670d91cdeb6b6693729950339cb45410fdc Mon Sep 17 00:00:00 2001 From: Kay Sievers Date: Tue, 14 Aug 2007 14:10:39 +0200 Subject: [SCSI] sr,sd: send media state change modification events This will send for a card reader slot (remove/add media): UEVENT[1187091572.155884] change /devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/host7/target7:0:0/7:0:0:0 (scsi) UEVENT[1187091572.162314] remove /block/sdb/sdb1 (block) UEVENT[1187091572.172464] add /block/sdb/sdb1 (block) UEVENT[1187091572.175408] change /devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/host7/target7:0:0/7:0:0:0 (scsi) and for a DVD drive (add/eject media): UEVENT[1187091590.189159] change /devices/pci0000:00/0000:00:1f.1/host4/target4:0:0/4:0:0:0 (scsi) UEVENT[1187091590.957124] add /module/isofs (module) UEVENT[1187091604.468207] change /devices/pci0000:00/0000:00:1f.1/host4/target4:0:0/4:0:0:0 (scsi) Userspace gets events, even for unpartitioned media. This unifies the event handling for asynchronoous events (AN) and events caused by perodical polling the device from userspace. Signed-off-by: Kay Sievers [jejb: modified for new event API] Signed-off-by: James Bottomley --- include/scsi/sd.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/scsi') diff --git a/include/scsi/sd.h b/include/scsi/sd.h index f751331..8ea9f73 100644 --- a/include/scsi/sd.h +++ b/include/scsi/sd.h @@ -41,6 +41,7 @@ struct scsi_disk { u32 index; u8 media_present; u8 write_prot; + unsigned previous_state : 1; unsigned WCE : 1; /* state of disk WCE bit */ unsigned RCD : 1; /* state of disk RCD bit, unused */ unsigned DPOFUA : 1; /* state of disk DPOFUA bit */ -- cgit v1.1 From 5929faf3334f4c69f3bb02be59d7c127e0cefa1f Mon Sep 17 00:00:00 2001 From: "Darrick J. Wong" Date: Mon, 5 Nov 2007 11:51:17 -0800 Subject: [SCSI] libsas: Convert sas_proto users to sas_protocol sparse complains about the mixing of enums in libsas. Since the underlying numeric values of both enums are the same, combine them to get rid of the warning. Signed-off-by: Darrick J. Wong Signed-off-by: James Bottomley --- include/scsi/libsas.h | 18 +++++++++--------- include/scsi/sas.h | 13 ++++++------- include/scsi/scsi_transport_sas.h | 8 +------- 3 files changed, 16 insertions(+), 23 deletions(-) (limited to 'include/scsi') diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h index a466c2c..e42374c 100644 --- a/include/scsi/libsas.h +++ b/include/scsi/libsas.h @@ -122,8 +122,8 @@ struct ex_phy { u8 attached_sata_dev:1; u8 attached_sata_ps:1; - enum sas_proto attached_tproto; - enum sas_proto attached_iproto; + enum sas_protocol attached_tproto; + enum sas_protocol attached_iproto; u8 attached_sas_addr[SAS_ADDR_SIZE]; u8 attached_phy_id; @@ -191,8 +191,8 @@ struct domain_device { struct list_head dev_list_node; - enum sas_proto iproto; - enum sas_proto tproto; + enum sas_protocol iproto; + enum sas_protocol tproto; struct sas_rphy *rphy; @@ -245,8 +245,8 @@ struct asd_sas_port { enum sas_class class; u8 sas_addr[SAS_ADDR_SIZE]; u8 attached_sas_addr[SAS_ADDR_SIZE]; - enum sas_proto iproto; - enum sas_proto tproto; + enum sas_protocol iproto; + enum sas_protocol tproto; enum sas_oob_mode oob_mode; @@ -289,8 +289,8 @@ struct asd_sas_phy { int id; /* must be set */ enum sas_class class; - enum sas_proto iproto; - enum sas_proto tproto; + enum sas_protocol iproto; + enum sas_protocol tproto; enum sas_phy_type type; enum sas_phy_role role; @@ -537,7 +537,7 @@ struct sas_task { spinlock_t task_state_lock; unsigned task_state_flags; - enum sas_proto task_proto; + enum sas_protocol task_proto; /* Used by the discovery code. */ struct timer_list timer; diff --git a/include/scsi/sas.h b/include/scsi/sas.h index 2f4b6af..e9fd022 100644 --- a/include/scsi/sas.h +++ b/include/scsi/sas.h @@ -102,13 +102,12 @@ enum sas_dev_type { SATA_PM_PORT= 8, }; -/* Partly from IDENTIFY address frame. */ -enum sas_proto { - SATA_PROTO = 1, - SAS_PROTO_SMP = 2, /* protocol */ - SAS_PROTO_STP = 4, /* protocol */ - SAS_PROTO_SSP = 8, /* protocol */ - SAS_PROTO_ALL = 0xE, +enum sas_protocol { + SAS_PROTOCOL_SATA = 0x01, + SAS_PROTOCOL_SMP = 0x02, + SAS_PROTOCOL_STP = 0x04, + SAS_PROTOCOL_SSP = 0x08, + SAS_PROTOCOL_ALL = 0x0E, }; /* From the spec; local phys only */ diff --git a/include/scsi/scsi_transport_sas.h b/include/scsi/scsi_transport_sas.h index abdfd2e..007d929 100644 --- a/include/scsi/scsi_transport_sas.h +++ b/include/scsi/scsi_transport_sas.h @@ -4,6 +4,7 @@ #include #include #include +#include struct scsi_transport_template; struct sas_rphy; @@ -16,13 +17,6 @@ enum sas_device_type { SAS_FANOUT_EXPANDER_DEVICE, }; -enum sas_protocol { - SAS_PROTOCOL_SATA = 0x01, - SAS_PROTOCOL_SMP = 0x02, - SAS_PROTOCOL_STP = 0x04, - SAS_PROTOCOL_SSP = 0x08, -}; - static inline int sas_protocol_ata(enum sas_protocol proto) { return ((proto & SAS_PROTOCOL_SATA) || -- cgit v1.1 From 8ee24023ef43c77cdaea1add00e1e45cc4fc3261 Mon Sep 17 00:00:00 2001 From: "Darrick J. Wong" Date: Mon, 5 Nov 2007 11:52:14 -0800 Subject: [SCSI] libsas: Fix various sparse complaints Annotate sas_queuecommand with locking details, and clean up a few more sparse warnings about static/non-static declarations. Signed-off-by: Darrick J. Wong Signed-off-by: James Bottomley --- include/scsi/libsas.h | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) (limited to 'include/scsi') diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h index e42374c..93248cd 100644 --- a/include/scsi/libsas.h +++ b/include/scsi/libsas.h @@ -563,7 +563,7 @@ struct sas_task { struct work_struct abort_work; }; - +extern struct kmem_cache *sas_task_cache; #define SAS_TASK_STATE_PENDING 1 #define SAS_TASK_STATE_DONE 2 @@ -573,7 +573,6 @@ struct sas_task { static inline struct sas_task *sas_alloc_task(gfp_t flags) { - extern struct kmem_cache *sas_task_cache; struct sas_task *task = kmem_cache_zalloc(sas_task_cache, flags); if (task) { @@ -590,7 +589,6 @@ static inline struct sas_task *sas_alloc_task(gfp_t flags) static inline void sas_free_task(struct sas_task *task) { if (task) { - extern struct kmem_cache *sas_task_cache; BUG_ON(!list_empty(&task->list)); kmem_cache_free(sas_task_cache, task); } -- cgit v1.1 From 25d7c363f2663fe399e623c9bd819258c9760bdc Mon Sep 17 00:00:00 2001 From: Tony Battersby Date: Mon, 12 Nov 2007 10:00:44 -0500 Subject: [SCSI] move single_lun flag from scsi_device to scsi_target Some SCSI tape medium changers that need the BLIST_SINGLELUN flag have the medium changer at one LUN and the tape drive at a different LUN. The inquiry string of the tape drive may be different from that of the medium changer. In order for single_lun to be effective, every scsi_device under a given scsi_target must have it set. This means that there needs to be a blacklist entry for BOTH the medium changer AND the tape drive, which is impractical because some medium changers may be paired with a variety of different tape drive models. It makes more sense to put the single_lun flag in scsi_target instead of scsi_device, which causes every device at a given target ID to inherit the single_lun flag from one LUN. This makes it possible to blacklist just the medium changer and not the tape drive. Signed-off-by: Tony Battersby Signed-off-by: James Bottomley --- include/scsi/scsi_device.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'include/scsi') diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h index 6c2d80b..45bb12b 100644 --- a/include/scsi/scsi_device.h +++ b/include/scsi/scsi_device.h @@ -122,9 +122,6 @@ struct scsi_device { unsigned tagged_supported:1; /* Supports SCSI-II tagged queuing */ unsigned simple_tags:1; /* simple queue tag messages are enabled */ unsigned ordered_tags:1;/* ordered queue tag messages are enabled */ - unsigned single_lun:1; /* Indicates we should only allow I/O to - * one of the luns for the device at a - * time. */ unsigned was_reset:1; /* There was a bus reset on the bus for * this device */ unsigned expecting_cc_ua:1; /* Expecting a CHECK_CONDITION/UNIT_ATTN @@ -202,6 +199,9 @@ struct scsi_target { unsigned int id; /* target id ... replace * scsi_device.id eventually */ unsigned int create:1; /* signal that it needs to be added */ + unsigned int single_lun:1; /* Indicates we should only + * allow I/O to one of the luns + * for the device at a time. */ unsigned int pdt_1f_for_no_lun; /* PDT = 0x1f */ /* means no lun present */ -- cgit v1.1 From 001aac257cf8adbe90cdcba6e07f8d12dfc8fa6b Mon Sep 17 00:00:00 2001 From: James Bottomley Date: Sun, 2 Dec 2007 19:10:40 +0200 Subject: [SCSI] sd,sr: add early detection of medium not present The current scsi_test_unit_ready() is updated to return sense code information (in struct scsi_sense_hdr). The sd and sr drivers are changed to interpret the sense code return asc 0x3a as no media and adjust the device status accordingly. Signed-off-by: James Bottomley --- include/scsi/scsi_device.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/scsi') diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h index 45bb12b..e0c645a 100644 --- a/include/scsi/scsi_device.h +++ b/include/scsi/scsi_device.h @@ -295,7 +295,7 @@ extern int scsi_mode_select(struct scsi_device *sdev, int pf, int sp, struct scsi_mode_data *data, struct scsi_sense_hdr *); extern int scsi_test_unit_ready(struct scsi_device *sdev, int timeout, - int retries); + int retries, struct scsi_sense_hdr *sshdr); extern int scsi_device_set_state(struct scsi_device *sdev, enum scsi_device_state state); extern struct scsi_event *sdev_evt_alloc(enum scsi_device_event evt_type, -- cgit v1.1 From 843c0a8a76078cf961b244b839683d0667313740 Mon Sep 17 00:00:00 2001 From: Mike Christie Date: Thu, 13 Dec 2007 12:43:20 -0600 Subject: [SCSI] libiscsi, iscsi_tcp: add device support This patch adds logical unit reset support. This should work for ib_iser, but I have not finished testing that driver so it is not hooked in yet. This patch also temporarily reverts the iscsi_tcp r2t write out patch. That code is completely rewritten in this patchset. Signed-off-by: Mike Christie Signed-off-by: James Bottomley --- include/scsi/iscsi_if.h | 2 ++ include/scsi/iscsi_proto.h | 2 ++ include/scsi/libiscsi.h | 25 +++++++++++++++---------- 3 files changed, 19 insertions(+), 10 deletions(-) (limited to 'include/scsi') diff --git a/include/scsi/iscsi_if.h b/include/scsi/iscsi_if.h index 50e907f..bff0b1f 100644 --- a/include/scsi/iscsi_if.h +++ b/include/scsi/iscsi_if.h @@ -236,6 +236,7 @@ enum iscsi_param { ISCSI_PARAM_PASSWORD, ISCSI_PARAM_PASSWORD_IN, + ISCSI_PARAM_FAST_ABORT, /* must always be last */ ISCSI_PARAM_MAX, }; @@ -266,6 +267,7 @@ enum iscsi_param { #define ISCSI_USERNAME_IN (1 << ISCSI_PARAM_USERNAME_IN) #define ISCSI_PASSWORD (1 << ISCSI_PARAM_PASSWORD) #define ISCSI_PASSWORD_IN (1 << ISCSI_PARAM_PASSWORD_IN) +#define ISCSI_FAST_ABORT (1 << ISCSI_PARAM_FAST_ABORT) /* iSCSI HBA params */ enum iscsi_host_param { diff --git a/include/scsi/iscsi_proto.h b/include/scsi/iscsi_proto.h index 8d1e4e8..751c81e 100644 --- a/include/scsi/iscsi_proto.h +++ b/include/scsi/iscsi_proto.h @@ -600,6 +600,8 @@ struct iscsi_reject { #define ISCSI_MIN_MAX_BURST_LEN 512 #define ISCSI_MAX_MAX_BURST_LEN 16777215 +#define ISCSI_DEF_TIME2WAIT 2 + /************************* RFC 3720 End *****************************/ #endif /* ISCSI_PROTO_H */ diff --git a/include/scsi/libiscsi.h b/include/scsi/libiscsi.h index b4b3113..89429f4 100644 --- a/include/scsi/libiscsi.h +++ b/include/scsi/libiscsi.h @@ -57,11 +57,14 @@ struct iscsi_nopin; #define ISCSI_MAX_CMD_PER_LUN 128 /* Task Mgmt states */ -#define TMABORT_INITIAL 0x0 -#define TMABORT_SUCCESS 0x1 -#define TMABORT_FAILED 0x2 -#define TMABORT_TIMEDOUT 0x3 -#define TMABORT_NOT_FOUND 0x4 +enum { + TMF_INITIAL, + TMF_QUEUED, + TMF_SUCCESS, + TMF_FAILED, + TMF_TIMEDOUT, + TMF_NOT_FOUND, +}; /* Connection suspend "bit" */ #define ISCSI_SUSPEND_BIT 1 @@ -91,7 +94,6 @@ enum { ISCSI_TASK_COMPLETED, ISCSI_TASK_PENDING, ISCSI_TASK_RUNNING, - ISCSI_TASK_ABORTING, }; struct iscsi_cmd_task { @@ -110,7 +112,6 @@ struct iscsi_cmd_task { unsigned data_count; /* remaining Data-Out */ struct scsi_cmnd *sc; /* associated SCSI cmd*/ struct iscsi_conn *conn; /* used connection */ - struct iscsi_mgmt_task *mtask; /* tmf mtask in progr */ /* state set/tested under session->lock */ int state; @@ -152,10 +153,11 @@ struct iscsi_conn { struct iscsi_cmd_task *ctask; /* xmit ctask in progress */ /* xmit */ - struct kfifo *mgmtqueue; /* mgmt (control) xmit queue */ + struct list_head mgmtqueue; /* mgmt (control) xmit queue */ struct list_head mgmt_run_list; /* list of control tasks */ struct list_head xmitqueue; /* data-path cmd queue */ struct list_head run_list; /* list of cmds in progress */ + struct list_head requeue; /* tasks needing another run */ struct work_struct xmitwork; /* per-conn. xmit workqueue */ unsigned long suspend_tx; /* suspend Tx */ unsigned long suspend_rx; /* suspend Rx */ @@ -163,8 +165,8 @@ struct iscsi_conn { /* abort */ wait_queue_head_t ehwait; /* used in eh_abort() */ struct iscsi_tm tmhdr; - struct timer_list tmabort_timer; - int tmabort_state; /* see TMABORT_INITIAL, etc.*/ + struct timer_list tmf_timer; + int tmf_state; /* see TMF_INITIAL, etc.*/ /* negotiated params */ unsigned max_recv_dlength; /* initiator_max_recv_dsl*/ @@ -231,6 +233,7 @@ struct iscsi_session { int pdu_inorder_en; int dataseq_inorder_en; int erl; + int fast_abort; int tpgt; char *username; char *username_in; @@ -268,6 +271,7 @@ struct iscsi_session { extern int iscsi_change_queue_depth(struct scsi_device *sdev, int depth); extern int iscsi_eh_abort(struct scsi_cmnd *sc); extern int iscsi_eh_host_reset(struct scsi_cmnd *sc); +extern int iscsi_eh_device_reset(struct scsi_cmnd *sc); extern int iscsi_queuecommand(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *)); @@ -326,6 +330,7 @@ extern int __iscsi_complete_pdu(struct iscsi_conn *, struct iscsi_hdr *, char *, int); extern int iscsi_verify_itt(struct iscsi_conn *, struct iscsi_hdr *, uint32_t *); +extern void iscsi_requeue_ctask(struct iscsi_cmd_task *ctask); /* * generic helpers -- cgit v1.1 From da32dd681f7a1a17073c42b375fc23cf73c92155 Mon Sep 17 00:00:00 2001 From: Olaf Kirch Date: Thu, 13 Dec 2007 12:43:21 -0600 Subject: [SCSI] iscsi_tcp: rewrite recv path Rewrite recv path. Fixes: - data digest processing and error handling. - ahs support. Some fixups by Mike Christie Signed-off-by: Olaf Kirch Signed-off-by: Mike Christie Signed-off-by: James Bottomley --- include/scsi/libiscsi.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'include/scsi') diff --git a/include/scsi/libiscsi.h b/include/scsi/libiscsi.h index 89429f4..e1fb3d0 100644 --- a/include/scsi/libiscsi.h +++ b/include/scsi/libiscsi.h @@ -77,6 +77,10 @@ enum { #define ISCSI_ADDRESS_BUF_LEN 64 +enum { + ISCSI_DIGEST_SIZE = sizeof(__u32), +}; + struct iscsi_mgmt_task { /* * Becuae LLDs allocate their hdr differently, this is a pointer to -- cgit v1.1 From 004d6530f83bee43a55b51bb5960db96e7ae0ffa Mon Sep 17 00:00:00 2001 From: Boaz Harrosh Date: Thu, 13 Dec 2007 12:43:23 -0600 Subject: [SCSI] iscsi_tcp, libiscsi: initial AHS Support at libiscsi generic code - currently code assumes a storage space of pdu header is allocated at llds ctask and is pointed to by iscsi_cmd_task->hdr. Here I add a hdr_max field pertaining to that storage, and an hdr_len that accumulates the current use of the pdu-header. - Add an iscsi_next_hdr() inline which returns the next free space to write new Header at. Also iscsi_next_hdr() is used to retrieve the address at which to write the header-digest. - Add iscsi_add_hdr(length). What the user do is calls iscsi_next_hdr() for address of the new header, than calls iscsi_add_hdr(length) with the size of the new header. iscsi_add_hdr() will check if space is available and update to the new size. length must be padded according to standard. - Add 2 padding inline helpers thanks to Olaf. Current patch does not use them but Following patches will. Also moved definition of ISCSI_PAD_LEN to iscsi_proto.h which had PAD_WORD_LEN that was never used anywhere. - Let iscsi_prep_scsi_cmd_pdu() signal an Error return since now it is possible that it will fail. - I was tired of yet again writing a "this is a digest" comment next to sizeof(__u32) so I defined a new ISCSI_DIGEST_SIZE. Now I don't need any comments. Changed all places that used sizeof(__u32) or "4" in connection to a digest. iscsi_tcp specific code - At struct iscsi_tcp_cmd_task allocate maximum space allowed in standard for all headers following the iscsi_cmd header. and mark it so in iscsi_tcp_session_create() - At iscsi_send_cmd_hdr() retrieve the correct headers size and write header digest at iscsi_next_hdr(). Signed-off-by: Boaz Harrosh Signed-off-by: Olaf Kirch Signed-off-by: Mike Christie Signed-off-by: James Bottomley --- include/scsi/iscsi_proto.h | 10 +++++++++- include/scsi/libiscsi.h | 33 +++++++++++++++++++++++++++++++-- 2 files changed, 40 insertions(+), 3 deletions(-) (limited to 'include/scsi') diff --git a/include/scsi/iscsi_proto.h b/include/scsi/iscsi_proto.h index 751c81e..6947082 100644 --- a/include/scsi/iscsi_proto.h +++ b/include/scsi/iscsi_proto.h @@ -27,7 +27,7 @@ #define ISCSI_LISTEN_PORT 3260 /* Padding word length */ -#define PAD_WORD_LEN 4 +#define ISCSI_PAD_LEN 4 /* * useful common(control and data pathes) macro @@ -147,6 +147,14 @@ struct iscsi_rlength_ahdr { __be32 read_length; }; +/* Extended CDB AHS */ +struct iscsi_ecdb_ahdr { + __be16 ahslength; /* CDB length - 15, including reserved byte */ + uint8_t ahstype; + uint8_t reserved; + uint8_t ecdb[260 - 16]; /* 4-byte aligned extended CDB spillover */ +}; + /* SCSI Response Header */ struct iscsi_cmd_rsp { uint8_t opcode; diff --git a/include/scsi/libiscsi.h b/include/scsi/libiscsi.h index e1fb3d0..a9a9e86 100644 --- a/include/scsi/libiscsi.h +++ b/include/scsi/libiscsi.h @@ -78,6 +78,9 @@ enum { #define ISCSI_ADDRESS_BUF_LEN 64 enum { + /* this is the maximum possible storage for AHSs */ + ISCSI_MAX_AHS_SIZE = sizeof(struct iscsi_ecdb_ahdr) + + sizeof(struct iscsi_rlength_ahdr), ISCSI_DIGEST_SIZE = sizeof(__u32), }; @@ -102,10 +105,13 @@ enum { struct iscsi_cmd_task { /* - * Becuae LLDs allocate their hdr differently, this is a pointer to - * that storage. It must be setup at session creation time. + * Because LLDs allocate their hdr differently, this is a pointer + * and length to that storage. It must be setup at session + * creation time. */ struct iscsi_cmd *hdr; + unsigned short hdr_max; + unsigned short hdr_len; /* accumulated size of hdr used */ int itt; /* this ITT */ uint32_t unsol_datasn; @@ -124,6 +130,11 @@ struct iscsi_cmd_task { void *dd_data; /* driver/transport data */ }; +static inline void* iscsi_next_hdr(struct iscsi_cmd_task *ctask) +{ + return (void*)ctask->hdr + ctask->hdr_len; +} + struct iscsi_conn { struct iscsi_cls_conn *cls_conn; /* ptr to class connection */ void *dd_data; /* iscsi_transport data */ @@ -342,4 +353,22 @@ extern void iscsi_requeue_ctask(struct iscsi_cmd_task *ctask); extern void iscsi_pool_free(struct iscsi_queue *, void **); extern int iscsi_pool_init(struct iscsi_queue *, int, void ***, int); +/* + * inline functions to deal with padding. + */ +static inline unsigned int +iscsi_padded(unsigned int len) +{ + return (len + ISCSI_PAD_LEN - 1) & ~(ISCSI_PAD_LEN - 1); +} + +static inline unsigned int +iscsi_padding(unsigned int len) +{ + len &= (ISCSI_PAD_LEN - 1); + if (len) + len = ISCSI_PAD_LEN - len; + return len; +} + #endif -- cgit v1.1 From 6320377fd94316e58f75d0be6f6e7a644950a4ee Mon Sep 17 00:00:00 2001 From: Olaf Kirch Date: Thu, 13 Dec 2007 12:43:25 -0600 Subject: [SCSI] libiscsi, iscsi_tcp: iscsi pool cleanup iscsi_pool_init simplified iscsi_pool_init currently has a lot of duplicate kfree() calls it does when some allocation fails. This patch simplifies the code a little by using iscsi_pool_free to tear down the pool in case of an error. iscsi_pool_init also returns a copy of the item array to the caller. Not all callers use this array, so we make it optional. Instead of allocating a second array and return that, allocate just one array, of twice the size. Update users of iscsi_pool_{init,free} This patch drops the (now useless) second argument to iscsi_pool_free, and updates all callers. It also removes the ctask->r2ts array, which was never used anyway. Since the items argument to iscsi_pool_init is now optional, we can pass NULL instead. Signed-off-by: Olaf Kirch Signed-off-by: Mike Christie Signed-off-by: James Bottomley --- include/scsi/libiscsi.h | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) (limited to 'include/scsi') diff --git a/include/scsi/libiscsi.h b/include/scsi/libiscsi.h index a9a9e86..4b3e3c1 100644 --- a/include/scsi/libiscsi.h +++ b/include/scsi/libiscsi.h @@ -215,7 +215,7 @@ struct iscsi_conn { uint32_t eh_abort_cnt; }; -struct iscsi_queue { +struct iscsi_pool { struct kfifo *queue; /* FIFO Queue */ void **pool; /* Pool of elements */ int max; /* Max number of elements */ @@ -274,10 +274,10 @@ struct iscsi_session { int cmds_max; /* size of cmds array */ struct iscsi_cmd_task **cmds; /* Original Cmds arr */ - struct iscsi_queue cmdpool; /* PDU's pool */ + struct iscsi_pool cmdpool; /* PDU's pool */ int mgmtpool_max; /* size of mgmt array */ struct iscsi_mgmt_task **mgmt_cmds; /* Original mgmt arr */ - struct iscsi_queue mgmtpool; /* Mgmt PDU's pool */ + struct iscsi_pool mgmtpool; /* Mgmt PDU's pool */ }; /* @@ -350,8 +350,8 @@ extern void iscsi_requeue_ctask(struct iscsi_cmd_task *ctask); /* * generic helpers */ -extern void iscsi_pool_free(struct iscsi_queue *, void **); -extern int iscsi_pool_init(struct iscsi_queue *, int, void ***, int); +extern void iscsi_pool_free(struct iscsi_pool *); +extern int iscsi_pool_init(struct iscsi_pool *, int, void ***, int); /* * inline functions to deal with padding. -- cgit v1.1 From b3a7ea8d50f6028964b468d13a095dfb2508b2fb Mon Sep 17 00:00:00 2001 From: Mike Christie Date: Thu, 13 Dec 2007 12:43:26 -0600 Subject: [SCSI] libiscsi: do not block session during logout There is not need to block the session during logout. Since we are going to fail the commands that were blocked just fail them immediately instead. Signed-off-by: Mike Christie Signed-off-by: James Bottomley --- include/scsi/libiscsi.h | 2 ++ include/scsi/scsi_transport_iscsi.h | 1 + 2 files changed, 3 insertions(+) (limited to 'include/scsi') diff --git a/include/scsi/libiscsi.h b/include/scsi/libiscsi.h index 4b3e3c1..d68f745 100644 --- a/include/scsi/libiscsi.h +++ b/include/scsi/libiscsi.h @@ -346,6 +346,8 @@ extern int __iscsi_complete_pdu(struct iscsi_conn *, struct iscsi_hdr *, extern int iscsi_verify_itt(struct iscsi_conn *, struct iscsi_hdr *, uint32_t *); extern void iscsi_requeue_ctask(struct iscsi_cmd_task *ctask); +extern void iscsi_free_mgmt_task(struct iscsi_conn *conn, + struct iscsi_mgmt_task *mtask); /* * generic helpers diff --git a/include/scsi/scsi_transport_iscsi.h b/include/scsi/scsi_transport_iscsi.h index 7ff6199..b8d97bd 100644 --- a/include/scsi/scsi_transport_iscsi.h +++ b/include/scsi/scsi_transport_iscsi.h @@ -176,6 +176,7 @@ struct iscsi_cls_conn { #define ISCSI_STATE_TERMINATE 4 #define ISCSI_STATE_IN_RECOVERY 5 #define ISCSI_STATE_RECOVERY_FAILED 6 +#define ISCSI_STATE_LOGGING_OUT 7 struct iscsi_cls_session { struct list_head sess_list; /* item in session_list */ -- cgit v1.1 From 2697478903d0ad8bdbf868b1346ae4b891662bb1 Mon Sep 17 00:00:00 2001 From: Mike Christie Date: Thu, 13 Dec 2007 12:43:29 -0600 Subject: [SCSI] libiscsi: fix shutdown We were using the device delete sysfs file to remove each device then logout. Now in 2.6.21 this will not work because the sysfs delete file returns immediately and does not wait for the device removal to complete. This causes a hang if a cache sync is needed during shutdown. Before .21, that approach had other problems, so this patch fixes the shutdown code so that we remove the target and unbind the session before logging out and shut down the session Signed-off-by: Mike Christie Signed-off-by: James Bottomley --- include/scsi/iscsi_if.h | 7 +++++++ include/scsi/iscsi_proto.h | 2 ++ include/scsi/scsi_transport_iscsi.h | 7 +++++-- 3 files changed, 14 insertions(+), 2 deletions(-) (limited to 'include/scsi') diff --git a/include/scsi/iscsi_if.h b/include/scsi/iscsi_if.h index bff0b1f..8a4426d 100644 --- a/include/scsi/iscsi_if.h +++ b/include/scsi/iscsi_if.h @@ -49,12 +49,15 @@ enum iscsi_uevent_e { ISCSI_UEVENT_TGT_DSCVR = UEVENT_BASE + 15, ISCSI_UEVENT_SET_HOST_PARAM = UEVENT_BASE + 16, + ISCSI_UEVENT_UNBIND_SESSION = UEVENT_BASE + 17, /* up events */ ISCSI_KEVENT_RECV_PDU = KEVENT_BASE + 1, ISCSI_KEVENT_CONN_ERROR = KEVENT_BASE + 2, ISCSI_KEVENT_IF_ERROR = KEVENT_BASE + 3, ISCSI_KEVENT_DESTROY_SESSION = KEVENT_BASE + 4, + ISCSI_KEVENT_UNBIND_SESSION = KEVENT_BASE + 5, + ISCSI_KEVENT_CREATE_SESSION = KEVENT_BASE + 6, }; enum iscsi_tgt_dscvr { @@ -156,6 +159,10 @@ struct iscsi_uevent { uint32_t sid; uint32_t cid; } c_conn_ret; + struct msg_unbind_session { + uint32_t sid; + uint32_t host_no; + } unbind_session; struct msg_recv_req { uint32_t sid; uint32_t cid; diff --git a/include/scsi/iscsi_proto.h b/include/scsi/iscsi_proto.h index 6947082..318a909 100644 --- a/include/scsi/iscsi_proto.h +++ b/include/scsi/iscsi_proto.h @@ -21,6 +21,8 @@ #ifndef ISCSI_PROTO_H #define ISCSI_PROTO_H +#include + #define ISCSI_DRAFT20_VERSION 0x00 /* default iSCSI listen port for incoming connections */ diff --git a/include/scsi/scsi_transport_iscsi.h b/include/scsi/scsi_transport_iscsi.h index b8d97bd..093b403 100644 --- a/include/scsi/scsi_transport_iscsi.h +++ b/include/scsi/scsi_transport_iscsi.h @@ -186,6 +186,7 @@ struct iscsi_cls_session { /* recovery fields */ int recovery_tmo; struct delayed_work recovery_work; + struct work_struct unbind_work; int target_id; @@ -206,6 +207,8 @@ struct iscsi_cls_session { struct iscsi_host { struct list_head sessions; struct mutex mutex; + struct workqueue_struct *unbind_workq; + char unbind_workq_name[KOBJ_NAME_LEN]; }; /* @@ -215,8 +218,8 @@ extern struct iscsi_cls_session *iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport); extern int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id); -extern int iscsi_if_create_session_done(struct iscsi_cls_conn *conn); -extern int iscsi_if_destroy_session_done(struct iscsi_cls_conn *conn); +extern int iscsi_session_event(struct iscsi_cls_session *session, + enum iscsi_uevent_e event); extern struct iscsi_cls_session *iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *t, unsigned int target_id); -- cgit v1.1 From f6d5180c78780d63b0577edeb3ce41eeb3e93eea Mon Sep 17 00:00:00 2001 From: Mike Christie Date: Thu, 13 Dec 2007 12:43:30 -0600 Subject: [SCSI] libiscsi: fix nop handling During root boot and shutdown the target could send us nops. At this time iscsid cannot be running, so the target will drop the session and the boot or shutdown will hang. To handle this and allow us to better control when to check the network this patch moves the nop handling to the kernel. Signed-off-by: Mike Christie Signed-off-by: James Bottomley --- include/scsi/iscsi_if.h | 11 +++++++++++ include/scsi/libiscsi.h | 8 ++++++++ 2 files changed, 19 insertions(+) (limited to 'include/scsi') diff --git a/include/scsi/iscsi_if.h b/include/scsi/iscsi_if.h index 8a4426d..e19e584 100644 --- a/include/scsi/iscsi_if.h +++ b/include/scsi/iscsi_if.h @@ -244,6 +244,12 @@ enum iscsi_param { ISCSI_PARAM_PASSWORD_IN, ISCSI_PARAM_FAST_ABORT, + ISCSI_PARAM_ABORT_TMO, + ISCSI_PARAM_LU_RESET_TMO, + ISCSI_PARAM_HOST_RESET_TMO, + + ISCSI_PARAM_PING_TMO, + ISCSI_PARAM_RECV_TMO, /* must always be last */ ISCSI_PARAM_MAX, }; @@ -275,6 +281,11 @@ enum iscsi_param { #define ISCSI_PASSWORD (1 << ISCSI_PARAM_PASSWORD) #define ISCSI_PASSWORD_IN (1 << ISCSI_PARAM_PASSWORD_IN) #define ISCSI_FAST_ABORT (1 << ISCSI_PARAM_FAST_ABORT) +#define ISCSI_ABORT_TMO (1 << ISCSI_PARAM_ABORT_TMO) +#define ISCSI_LU_RESET_TMO (1 << ISCSI_PARAM_LU_RESET_TMO) +#define ISCSI_HOST_RESET_TMO (1 << ISCSI_PARAM_HOST_RESET_TMO) +#define ISCSI_PING_TMO (1 << ISCSI_PARAM_PING_TMO) +#define ISCSI_RECV_TMO (1 << ISCSI_PARAM_RECV_TMO) /* iSCSI HBA params */ enum iscsi_host_param { diff --git a/include/scsi/libiscsi.h b/include/scsi/libiscsi.h index d68f745..889f51f 100644 --- a/include/scsi/libiscsi.h +++ b/include/scsi/libiscsi.h @@ -148,6 +148,12 @@ struct iscsi_conn { * conn_stop() flag: stop to recover, stop to terminate */ int stop_stage; + struct timer_list transport_timer; + unsigned long last_recv; + unsigned long last_ping; + int ping_timeout; + int recv_timeout; + struct iscsi_mgmt_task *ping_mtask; /* iSCSI connection-wide sequencing */ uint32_t exp_statsn; @@ -238,6 +244,8 @@ struct iscsi_session { uint32_t queued_cmdsn; /* configuration */ + int abort_timeout; + int lu_reset_timeout; int initial_r2t_en; unsigned max_r2t; int imm_data_en; -- cgit v1.1 From a8ac6311cc21d78fa284cd43f56df2063f536bf1 Mon Sep 17 00:00:00 2001 From: Olaf Kirch Date: Thu, 13 Dec 2007 12:43:35 -0600 Subject: [SCSI] iscsi: convert xmit path to iscsi chunks Convert xmit to iscsi chunks. from michaelc@cs.wisc.edu: Bug fixes, more digest integration, sg chaining conversion and other sg wrapper changes, coding style sync up, and removal of io fields, like pdu_sent, that are not needed. Signed-off-by: Olaf Kirch Signed-off-by: Mike Christie Signed-off-by: James Bottomley --- include/scsi/scsi_transport_iscsi.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/scsi') diff --git a/include/scsi/scsi_transport_iscsi.h b/include/scsi/scsi_transport_iscsi.h index 093b403..404f11d 100644 --- a/include/scsi/scsi_transport_iscsi.h +++ b/include/scsi/scsi_transport_iscsi.h @@ -118,7 +118,7 @@ struct iscsi_transport { char *data, uint32_t data_size); void (*get_stats) (struct iscsi_cls_conn *conn, struct iscsi_stats *stats); - void (*init_cmd_task) (struct iscsi_cmd_task *ctask); + int (*init_cmd_task) (struct iscsi_cmd_task *ctask); void (*init_mgmt_task) (struct iscsi_conn *conn, struct iscsi_mgmt_task *mtask); int (*xmit_cmd_task) (struct iscsi_conn *conn, -- cgit v1.1 From b98e66fa0b687149dc3b26179096dc542c7d5001 Mon Sep 17 00:00:00 2001 From: James Bottomley Date: Fri, 28 Dec 2007 16:35:17 -0600 Subject: [SCSI] libsas: add host SMP processing This adds support for host side SMP processing, via a separate SMP interpreter file. Signed-off-by: James Bottomley --- include/scsi/scsi_transport_sas.h | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'include/scsi') diff --git a/include/scsi/scsi_transport_sas.h b/include/scsi/scsi_transport_sas.h index 007d929..09125fa 100644 --- a/include/scsi/scsi_transport_sas.h +++ b/include/scsi/scsi_transport_sas.h @@ -11,10 +11,10 @@ struct sas_rphy; struct request; enum sas_device_type { - SAS_PHY_UNUSED, - SAS_END_DEVICE, - SAS_EDGE_EXPANDER_DEVICE, - SAS_FANOUT_EXPANDER_DEVICE, + SAS_PHY_UNUSED = 0, + SAS_END_DEVICE = 1, + SAS_EDGE_EXPANDER_DEVICE = 2, + SAS_FANOUT_EXPANDER_DEVICE = 3, }; static inline int sas_protocol_ata(enum sas_protocol proto) -- cgit v1.1 From 32e8ae36b8f80372015b88b63c4358a376c9af0f Mon Sep 17 00:00:00 2001 From: James Bottomley Date: Sun, 30 Dec 2007 12:37:31 -0600 Subject: [SCSI] libsas: don't use made up error codes This is bad for two reasons: 1. If they're returned to outside applications, no-one knows what they mean. 2. Eventually they'll clash with the ever expanding standard error codes. The problem error code in question is ETASK. I've replaced this by ECOMM (communications error on send) a network error code that seems to most closely relay what ETASK meant. Acked-by: Darrick J. Wong Signed-off-by: James Bottomley --- include/scsi/libsas.h | 2 -- 1 file changed, 2 deletions(-) (limited to 'include/scsi') diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h index 93248cd..a075f13 100644 --- a/include/scsi/libsas.h +++ b/include/scsi/libsas.h @@ -91,8 +91,6 @@ enum discover_event { /* ---------- Expander Devices ---------- */ -#define ETASK 0xFA - #define to_dom_device(_obj) container_of(_obj, struct domain_device, dev_obj) #define to_dev_attr(_attr) container_of(_attr, struct domain_dev_attribute,\ attr) -- cgit v1.1 From a0899d4df534d2bcf671b0f647b809842309a9ae Mon Sep 17 00:00:00 2001 From: Hans de Goede Date: Sun, 20 Jan 2008 11:12:26 +0100 Subject: [SCSI] sd: add fix for devices with last sector access problems This patch adds a new scsi_device flag (last_sector_bug) for devices which contain a bug where the device crashes when the last sector is read in a larger then 1 sector read. This is for example the case with sdcards in the HP PSC1350 printer cardreader and in the HP PSC1610 printer cardreader. Signed-off-by: Hans de Goede Signed-off-by: James Bottomley --- include/scsi/scsi_device.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/scsi') diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h index e0c645a..3c8f898 100644 --- a/include/scsi/scsi_device.h +++ b/include/scsi/scsi_device.h @@ -139,6 +139,7 @@ struct scsi_device { unsigned fix_capacity:1; /* READ_CAPACITY is too high by 1 */ unsigned guess_capacity:1; /* READ_CAPACITY might be too high by 1 */ unsigned retry_hwerror:1; /* Retry HARDWARE_ERROR */ + unsigned last_sector_bug:1; /* Always read last sector in a 1 sector read */ DECLARE_BITMAP(supported_events, SDEV_EVT_MAXBITS); /* supported events */ struct list_head event_list; /* asserted events */ -- cgit v1.1 From b30c2fc1113edfb2371427c10503ff942b0a0370 Mon Sep 17 00:00:00 2001 From: James Bottomley Date: Sun, 20 Jan 2008 09:09:40 -0600 Subject: [SCSI] scsi.h: add macro for enclosure bit of inquiry data The macro tells us whether the device is (or contains) an enclosure device. Signed-off-by: James Bottomley --- include/scsi/scsi_device.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'include/scsi') diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h index 3c8f898..ab7acbe 100644 --- a/include/scsi/scsi_device.h +++ b/include/scsi/scsi_device.h @@ -387,6 +387,10 @@ static inline int scsi_device_qas(struct scsi_device *sdev) return 0; return sdev->inquiry[56] & 0x02; } +static inline int scsi_device_enclosure(struct scsi_device *sdev) +{ + return sdev->inquiry[6] & (1<<6); +} #define MODULE_ALIAS_SCSI_DEVICE(type) \ MODULE_ALIAS("scsi:t-" __stringify(type) "*") -- cgit v1.1 From de25deb18016f66dcdede165d07654559bb332bc Mon Sep 17 00:00:00 2001 From: FUJITA Tomonori Date: Wed, 16 Jan 2008 13:32:17 +0900 Subject: [SCSI] use dynamically allocated sense buffer This removes static array sense_buffer in scsi_cmnd and uses dynamically allocated sense_buffer (with GFP_DMA). The reason for doing this is that some architectures need cacheline aligned buffer for DMA: http://lkml.org/lkml/2007/11/19/2 The problems are that scsi_eh_prep_cmnd puts scsi_cmnd::sense_buffer to sglist and some LLDs directly DMA to scsi_cmnd::sense_buffer. It's necessary to DMA to scsi_cmnd::sense_buffer safely. This patch solves these issues. __scsi_get_command allocates sense_buffer via kmem_cache_alloc and attaches it to a scsi_cmnd so everything just work as before. Signed-off-by: FUJITA Tomonori Signed-off-by: James Bottomley --- include/scsi/scsi_cmnd.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/scsi') diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h index 3f47e52..abd7479 100644 --- a/include/scsi/scsi_cmnd.h +++ b/include/scsi/scsi_cmnd.h @@ -88,7 +88,7 @@ struct scsi_cmnd { working on */ #define SCSI_SENSE_BUFFERSIZE 96 - unsigned char sense_buffer[SCSI_SENSE_BUFFERSIZE]; + unsigned char *sense_buffer; /* obtained by REQUEST SENSE when * CHECK CONDITION is received on original * command (auto-sense) */ -- cgit v1.1 From 366ca51f30de1cbb5b356c70b7bb22051c558e41 Mon Sep 17 00:00:00 2001 From: James Bottomley Date: Fri, 18 Jan 2008 10:47:01 -0600 Subject: [SCSI] libsas: abstract STP task status into a function Break out the frame processor for STP tasks from aic94xx so they can be shared by other SAS HBA's Original patch from Jeff Garzik Signed-off-by: James Bottomley --- include/scsi/libsas.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'include/scsi') diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h index a075f13..3ffd6b5 100644 --- a/include/scsi/libsas.h +++ b/include/scsi/libsas.h @@ -672,4 +672,8 @@ extern int sas_ioctl(struct scsi_device *sdev, int cmd, void __user *arg); extern int sas_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy, struct request *req); + +extern void sas_ssp_task_response(struct device *dev, struct sas_task *task, + struct ssp_response_iu *iu); + #endif /* _SASLIB_H_ */ -- cgit v1.1 From 5ed7959ede0936c55e50421a53f153b17080e876 Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Thu, 15 Nov 2007 09:13:11 +0100 Subject: SG: Convert SCSI to use scatterlist helpers for sg chaining Also change scsi_alloc_sgtable() to just return 0/failure, since it maps to the command passed in. ->request_buffer is now no longer needed, once drivers are adapted to use scsi_sglist() it can be killed. Signed-off-by: Jens Axboe --- include/scsi/scsi_cmnd.h | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) (limited to 'include/scsi') diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h index abd7479..a457fca 100644 --- a/include/scsi/scsi_cmnd.h +++ b/include/scsi/scsi_cmnd.h @@ -8,7 +8,6 @@ #include struct request; -struct scatterlist; struct Scsi_Host; struct scsi_device; @@ -68,8 +67,8 @@ struct scsi_cmnd { void *request_buffer; /* Actual requested buffer */ /* These elements define the operation we ultimately want to perform */ + struct sg_table sg_table; unsigned short use_sg; /* Number of pieces of scatter-gather */ - unsigned short __use_sg; unsigned underflow; /* Return error if less than this amount is transferred */ @@ -128,14 +127,14 @@ extern void *scsi_kmap_atomic_sg(struct scatterlist *sg, int sg_count, size_t *offset, size_t *len); extern void scsi_kunmap_atomic_sg(void *virt); -extern struct scatterlist *scsi_alloc_sgtable(struct scsi_cmnd *, gfp_t); +extern int scsi_alloc_sgtable(struct scsi_cmnd *, gfp_t); extern void scsi_free_sgtable(struct scsi_cmnd *); extern int scsi_dma_map(struct scsi_cmnd *cmd); extern void scsi_dma_unmap(struct scsi_cmnd *cmd); #define scsi_sg_count(cmd) ((cmd)->use_sg) -#define scsi_sglist(cmd) ((struct scatterlist *)(cmd)->request_buffer) +#define scsi_sglist(cmd) ((cmd)->sg_table.sgl) #define scsi_bufflen(cmd) ((cmd)->request_bufflen) static inline void scsi_set_resid(struct scsi_cmnd *cmd, int resid) -- cgit v1.1 From bb52d82f45df3a2661d88befba7c79a7db8be496 Mon Sep 17 00:00:00 2001 From: Boaz Harrosh Date: Thu, 13 Dec 2007 16:14:27 -0800 Subject: [SCSI] tgt: use scsi_init_io instead of scsi_alloc_sgtable If we export scsi_init_io()/scsi_release_buffers() instead of scsi_{alloc,free}_sgtable() from scsi_lib than tgt code is much more insulated from scsi_lib changes. As a bonus it will also gain bidi capability when it comes. [jejb: rebase on to sg_table and fix up rejections] Signed-off-by: Boaz Harrosh Acked-by: FUJITA Tomonori Signed-off-by: Andrew Morton Signed-off-by: James Bottomley --- include/scsi/scsi_cmnd.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'include/scsi') diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h index a457fca..09d44f9 100644 --- a/include/scsi/scsi_cmnd.h +++ b/include/scsi/scsi_cmnd.h @@ -127,8 +127,8 @@ extern void *scsi_kmap_atomic_sg(struct scatterlist *sg, int sg_count, size_t *offset, size_t *len); extern void scsi_kunmap_atomic_sg(void *virt); -extern int scsi_alloc_sgtable(struct scsi_cmnd *, gfp_t); -extern void scsi_free_sgtable(struct scsi_cmnd *); +extern int scsi_init_io(struct scsi_cmnd *cmd, gfp_t gfp_mask); +extern void scsi_release_buffers(struct scsi_cmnd *cmd); extern int scsi_dma_map(struct scsi_cmnd *cmd); extern void scsi_dma_unmap(struct scsi_cmnd *cmd); -- cgit v1.1 From 30b0c37b27485a9cb897bfe3824f6f517b8c80d6 Mon Sep 17 00:00:00 2001 From: Boaz Harrosh Date: Thu, 13 Dec 2007 13:47:40 +0200 Subject: [SCSI] implement scsi_data_buffer In preparation for bidi we abstract all IO members of scsi_cmnd, that will need to duplicate, into a substructure. - Group all IO members of scsi_cmnd into a scsi_data_buffer structure. - Adjust accessors to new members. - scsi_{alloc,free}_sgtable receive a scsi_data_buffer instead of scsi_cmnd. And work on it. - Adjust scsi_init_io() and scsi_release_buffers() for above change. - Fix other parts of scsi_lib/scsi.c to members migration. Use accessors where appropriate. - fix Documentation about scsi_cmnd in scsi_host.h - scsi_error.c * Changed needed members of struct scsi_eh_save. * Careful considerations in scsi_eh_prep/restore_cmnd. - sd.c and sr.c * sd and sr would adjust IO size to align on device's block size so code needs to change once we move to scsi_data_buff implementation. * Convert code to use scsi_for_each_sg * Use data accessors where appropriate. - tgt: convert libsrp to use scsi_data_buffer - isd200: This driver still bangs on scsi_cmnd IO members, so need changing [jejb: rebased on top of sg_table patches fixed up conflicts and used the synergy to eliminate use_sg and sg_count] Signed-off-by: Boaz Harrosh Signed-off-by: FUJITA Tomonori Signed-off-by: James Bottomley --- include/scsi/scsi_cmnd.h | 36 ++++++++++++++++++++++-------------- include/scsi/scsi_eh.h | 8 +++----- include/scsi/scsi_host.h | 4 ++-- 3 files changed, 27 insertions(+), 21 deletions(-) (limited to 'include/scsi') diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h index 09d44f9..c6478bb 100644 --- a/include/scsi/scsi_cmnd.h +++ b/include/scsi/scsi_cmnd.h @@ -11,6 +11,11 @@ struct request; struct Scsi_Host; struct scsi_device; +struct scsi_data_buffer { + struct sg_table table; + unsigned length; + int resid; +}; /* embedded in scsi_cmnd */ struct scsi_pointer { @@ -61,15 +66,11 @@ struct scsi_cmnd { /* These elements define the operation we are about to perform */ #define MAX_COMMAND_SIZE 16 unsigned char cmnd[MAX_COMMAND_SIZE]; - unsigned request_bufflen; /* Actual request size */ struct timer_list eh_timeout; /* Used to time out the command. */ - void *request_buffer; /* Actual requested buffer */ /* These elements define the operation we ultimately want to perform */ - struct sg_table sg_table; - unsigned short use_sg; /* Number of pieces of scatter-gather */ - + struct scsi_data_buffer sdb; unsigned underflow; /* Return error if less than this amount is transferred */ @@ -79,10 +80,6 @@ struct scsi_cmnd { reconnects. Probably == sector size */ - int resid; /* Number of bytes requested to be - transferred less actual number - transferred (0 if not supported) */ - struct request *request; /* The command we are working on */ @@ -133,18 +130,29 @@ extern void scsi_release_buffers(struct scsi_cmnd *cmd); extern int scsi_dma_map(struct scsi_cmnd *cmd); extern void scsi_dma_unmap(struct scsi_cmnd *cmd); -#define scsi_sg_count(cmd) ((cmd)->use_sg) -#define scsi_sglist(cmd) ((cmd)->sg_table.sgl) -#define scsi_bufflen(cmd) ((cmd)->request_bufflen) +static inline unsigned scsi_sg_count(struct scsi_cmnd *cmd) +{ + return cmd->sdb.table.nents; +} + +static inline struct scatterlist *scsi_sglist(struct scsi_cmnd *cmd) +{ + return cmd->sdb.table.sgl; +} + +static inline unsigned scsi_bufflen(struct scsi_cmnd *cmd) +{ + return cmd->sdb.length; +} static inline void scsi_set_resid(struct scsi_cmnd *cmd, int resid) { - cmd->resid = resid; + cmd->sdb.resid = resid; } static inline int scsi_get_resid(struct scsi_cmnd *cmd) { - return cmd->resid; + return cmd->sdb.resid; } #define scsi_for_each_sg(cmd, sg, nseg, __i) \ diff --git a/include/scsi/scsi_eh.h b/include/scsi/scsi_eh.h index d21b891..1e08be1 100644 --- a/include/scsi/scsi_eh.h +++ b/include/scsi/scsi_eh.h @@ -68,16 +68,14 @@ extern int scsi_get_sense_info_fld(const u8 * sense_buffer, int sb_len, extern int scsi_reset_provider(struct scsi_device *, int); struct scsi_eh_save { + /* saved state */ int result; enum dma_data_direction data_direction; unsigned char cmd_len; unsigned char cmnd[MAX_COMMAND_SIZE]; + struct scsi_data_buffer sdb; - void *buffer; - unsigned bufflen; - unsigned short use_sg; - int resid; - + /* new command support */ struct scatterlist sense_sgl; }; diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h index 0fd4746..cb2bcab 100644 --- a/include/scsi/scsi_host.h +++ b/include/scsi/scsi_host.h @@ -136,9 +136,9 @@ struct scsi_host_template { * the done callback is invoked. * * This is called to inform the LLD to transfer - * cmd->request_bufflen bytes. The cmd->use_sg speciefies the + * scsi_bufflen(cmd) bytes. scsi_sg_count(cmd) speciefies the * number of scatterlist entried in the command and - * cmd->request_buffer contains the scatterlist. + * scsi_sglist(cmd) returns the scatterlist. * * return values: see queuecommand * -- cgit v1.1 From 6f9a35e2dafa0f855ab051c11bdbf739745ff6f5 Mon Sep 17 00:00:00 2001 From: Boaz Harrosh Date: Thu, 13 Dec 2007 13:50:53 +0200 Subject: [SCSI] bidirectional command support At the block level bidi request uses req->next_rq pointer for a second bidi_read request. At Scsi-midlayer a second scsi_data_buffer structure is used for the bidi_read part. This bidi scsi_data_buffer is put on request->next_rq->special. Struct scsi_cmnd is not changed. - Define scsi_bidi_cmnd() to return true if it is a bidi request and a second sgtable was allocated. - Define scsi_in()/scsi_out() to return the in or out scsi_data_buffer from this command This API is to isolate users from the mechanics of bidi. - Define scsi_end_bidi_request() to do what scsi_end_request() does but for a bidi request. This is necessary because bidi commands are a bit tricky here. (See comments in body) - scsi_release_buffers() will also release the bidi_read scsi_data_buffer - scsi_io_completion() on bidi commands will now call scsi_end_bidi_request() and return. - The previous work done in scsi_init_io() is now done in a new scsi_init_sgtable() (which is 99% identical to old scsi_init_io()) The new scsi_init_io() will call the above twice if needed also for the bidi_read command. Only at this point is a command bidi. - In scsi_error.c at scsi_eh_prep/restore_cmnd() make sure bidi-lld is not confused by a get-sense command that looks like bidi. This is done by puting NULL at request->next_rq, and restoring. [jejb: update to sg_table and resolve conflicts also update to blk-end-request and resolve conflicts] Signed-off-by: Boaz Harrosh Signed-off-by: James Bottomley --- include/scsi/scsi_cmnd.h | 19 ++++++++++++++++++- include/scsi/scsi_eh.h | 1 + 2 files changed, 19 insertions(+), 1 deletion(-) (limited to 'include/scsi') diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h index c6478bb..de28aab 100644 --- a/include/scsi/scsi_cmnd.h +++ b/include/scsi/scsi_cmnd.h @@ -2,12 +2,12 @@ #define _SCSI_SCSI_CMND_H #include +#include #include #include #include #include -struct request; struct Scsi_Host; struct scsi_device; @@ -158,4 +158,21 @@ static inline int scsi_get_resid(struct scsi_cmnd *cmd) #define scsi_for_each_sg(cmd, sg, nseg, __i) \ for_each_sg(scsi_sglist(cmd), sg, nseg, __i) +static inline int scsi_bidi_cmnd(struct scsi_cmnd *cmd) +{ + return blk_bidi_rq(cmd->request) && + (cmd->request->next_rq->special != NULL); +} + +static inline struct scsi_data_buffer *scsi_in(struct scsi_cmnd *cmd) +{ + return scsi_bidi_cmnd(cmd) ? + cmd->request->next_rq->special : &cmd->sdb; +} + +static inline struct scsi_data_buffer *scsi_out(struct scsi_cmnd *cmd) +{ + return &cmd->sdb; +} + #endif /* _SCSI_SCSI_CMND_H */ diff --git a/include/scsi/scsi_eh.h b/include/scsi/scsi_eh.h index 1e08be1..25071d5 100644 --- a/include/scsi/scsi_eh.h +++ b/include/scsi/scsi_eh.h @@ -74,6 +74,7 @@ struct scsi_eh_save { unsigned char cmd_len; unsigned char cmnd[MAX_COMMAND_SIZE]; struct scsi_data_buffer sdb; + struct request *next_rq; /* new command support */ struct scatterlist sense_sgl; -- cgit v1.1 From d3f46f39b7092594b498abc12f0c73b0b9913bde Mon Sep 17 00:00:00 2001 From: James Bottomley Date: Tue, 15 Jan 2008 11:11:46 -0600 Subject: [SCSI] remove use_sg_chaining With the sg table code, every SCSI driver is now either chain capable or broken (or has sg_tablesize set so chaining is never activated), so there's no need to have a check in the host template. Also tidy up the code by moving the scatterlist size defines into the SCSI includes and permit the last entry of the scatterlist pools not to be a power of two. Signed-off-by: James Bottomley --- include/scsi/scsi.h | 19 +++++++++++++++++++ include/scsi/scsi_host.h | 13 ------------- 2 files changed, 19 insertions(+), 13 deletions(-) (limited to 'include/scsi') diff --git a/include/scsi/scsi.h b/include/scsi/scsi.h index 702fcfe..0f55f5b 100644 --- a/include/scsi/scsi.h +++ b/include/scsi/scsi.h @@ -11,6 +11,25 @@ #include /* + * The maximum number of SG segments that we will put inside a + * scatterlist (unless chaining is used). Should ideally fit inside a + * single page, to avoid a higher order allocation. We could define this + * to SG_MAX_SINGLE_ALLOC to pack correctly at the highest order. The + * minimum value is 32 + */ +#define SCSI_MAX_SG_SEGMENTS 128 + +/* + * Like SCSI_MAX_SG_SEGMENTS, but for archs that have sg chaining. This limit + * is totally arbitrary, a setting of 2048 will get you at least 8mb ios. + */ +#ifdef ARCH_HAS_SG_CHAIN +#define SCSI_MAX_SG_CHAIN_SEGMENTS 2048 +#else +#define SCSI_MAX_SG_CHAIN_SEGMENTS SCSI_MAX_SG_SEGMENTS +#endif + +/* * SCSI command lengths */ diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h index cb2bcab..5c58d59 100644 --- a/include/scsi/scsi_host.h +++ b/include/scsi/scsi_host.h @@ -39,9 +39,6 @@ struct blk_queue_tags; #define DISABLE_CLUSTERING 0 #define ENABLE_CLUSTERING 1 -#define DISABLE_SG_CHAINING 0 -#define ENABLE_SG_CHAINING 1 - enum scsi_eh_timer_return { EH_NOT_HANDLED, EH_HANDLED, @@ -446,15 +443,6 @@ struct scsi_host_template { unsigned ordered_tag:1; /* - * true if the low-level driver can support sg chaining. this - * will be removed eventually when all the drivers are - * converted to support sg chaining. - * - * Status: OBSOLETE - */ - unsigned use_sg_chaining:1; - - /* * Countdown for host blocking with no commands outstanding */ unsigned int max_host_blocked; @@ -598,7 +586,6 @@ struct Scsi_Host { unsigned unchecked_isa_dma:1; unsigned use_clustering:1; unsigned use_blk_tcq:1; - unsigned use_sg_chaining:1; /* * Host has requested that no further requests come through for the -- cgit v1.1 From c639d14e2f70d086842d37fb8e4f5ab9bd56af2e Mon Sep 17 00:00:00 2001 From: FUJITA Tomonori Date: Wed, 23 Jan 2008 01:32:01 +0900 Subject: [SCSI] scsi_debug: add XDWRITEREAD_10 support Signed-off-by: FUJITA Tomonori Acked-by: Douglas Gilbert Signed-off-by: James Bottomley --- include/scsi/scsi.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/scsi') diff --git a/include/scsi/scsi.h b/include/scsi/scsi.h index 0f55f5b..8225157 100644 --- a/include/scsi/scsi.h +++ b/include/scsi/scsi.h @@ -102,6 +102,7 @@ extern const unsigned char scsi_command_size[8]; #define READ_TOC 0x43 #define LOG_SELECT 0x4c #define LOG_SENSE 0x4d +#define XDWRITEREAD_10 0x53 #define MODE_SELECT_10 0x55 #define RESERVE_10 0x56 #define RELEASE_10 0x57 -- cgit v1.1