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author | Nicholas Bellinger <nab@linux-iscsi.org> | 2010-12-17 11:11:26 -0800 |
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committer | James Bottomley <James.Bottomley@suse.de> | 2011-01-14 10:12:29 -0600 |
commit | c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5 (patch) | |
tree | 71c6344688bf56ea6aaf18c586ab69ff4f077ade /drivers/target/target_core_pscsi.h | |
parent | f4013c3879d1bbd9f3ab8351185decd049502368 (diff) | |
download | linux-c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5.tar.gz linux-c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5.tar.bz2 linux-c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5.zip |
[SCSI] target: Add LIO target core v4.0.0-rc6
LIO target is a full featured in-kernel target framework with the
following feature set:
High-performance, non-blocking, multithreaded architecture with SIMD
support.
Advanced SCSI feature set:
* Persistent Reservations (PRs)
* Asymmetric Logical Unit Assignment (ALUA)
* Protocol and intra-nexus multiplexing, load-balancing and failover (MC/S)
* Full Error Recovery (ERL=0,1,2)
* Active/active task migration and session continuation (ERL=2)
* Thin LUN provisioning (UNMAP and WRITE_SAMExx)
Multiprotocol target plugins
Storage media independence:
* Virtualization of all storage media; transparent mapping of IO to LUNs
* No hard limits on number of LUNs per Target; maximum LUN size ~750 TB
* Backstores: SATA, SAS, SCSI, BluRay, DVD, FLASH, USB, ramdisk, etc.
Standards compliance:
* Full compliance with IETF (RFC 3720)
* Full implementation of SPC-4 PRs and ALUA
Significant code cleanups done by Christoph Hellwig.
[jejb: fix up for new block bdev exclusive interface. Minor fixes from
Randy Dunlap and Dan Carpenter.]
Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/target/target_core_pscsi.h')
-rw-r--r-- | drivers/target/target_core_pscsi.h | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/drivers/target/target_core_pscsi.h b/drivers/target/target_core_pscsi.h new file mode 100644 index 000000000000..a4cd5d352c3a --- /dev/null +++ b/drivers/target/target_core_pscsi.h @@ -0,0 +1,65 @@ +#ifndef TARGET_CORE_PSCSI_H +#define TARGET_CORE_PSCSI_H + +#define PSCSI_VERSION "v4.0" +#define PSCSI_VIRTUAL_HBA_DEPTH 2048 + +/* used in pscsi_find_alloc_len() */ +#ifndef INQUIRY_DATA_SIZE +#define INQUIRY_DATA_SIZE 0x24 +#endif + +/* used in pscsi_add_device_to_list() */ +#define PSCSI_DEFAULT_QUEUEDEPTH 1 + +#define PS_RETRY 5 +#define PS_TIMEOUT_DISK (15*HZ) +#define PS_TIMEOUT_OTHER (500*HZ) + +#include <linux/device.h> +#include <scsi/scsi_driver.h> +#include <scsi/scsi_device.h> +#include <linux/kref.h> +#include <linux/kobject.h> + +struct pscsi_plugin_task { + struct se_task pscsi_task; + unsigned char *pscsi_cdb; + unsigned char __pscsi_cdb[TCM_MAX_COMMAND_SIZE]; + unsigned char pscsi_sense[SCSI_SENSE_BUFFERSIZE]; + int pscsi_direction; + int pscsi_result; + u32 pscsi_resid; + struct request *pscsi_req; +} ____cacheline_aligned; + +#define PDF_HAS_CHANNEL_ID 0x01 +#define PDF_HAS_TARGET_ID 0x02 +#define PDF_HAS_LUN_ID 0x04 +#define PDF_HAS_VPD_UNIT_SERIAL 0x08 +#define PDF_HAS_VPD_DEV_IDENT 0x10 +#define PDF_HAS_VIRT_HOST_ID 0x20 + +struct pscsi_dev_virt { + int pdv_flags; + int pdv_host_id; + int pdv_channel_id; + int pdv_target_id; + int pdv_lun_id; + struct block_device *pdv_bd; + struct scsi_device *pdv_sd; + struct se_hba *pdv_se_hba; +} ____cacheline_aligned; + +typedef enum phv_modes { + PHV_VIRUTAL_HOST_ID, + PHV_LLD_SCSI_HOST_NO +} phv_modes_t; + +struct pscsi_hba_virt { + int phv_host_id; + phv_modes_t phv_mode; + struct Scsi_Host *phv_lld_host; +} ____cacheline_aligned; + +#endif /*** TARGET_CORE_PSCSI_H ***/ |