diff options
Diffstat (limited to 'include/scsi')
| -rw-r--r-- | include/scsi/libsas.h | 14 | ||||
| -rw-r--r-- | include/scsi/libsrp.h | 77 | ||||
| -rw-r--r-- | include/scsi/scsi_cmnd.h | 10 | ||||
| -rw-r--r-- | include/scsi/scsi_device.h | 30 | ||||
| -rw-r--r-- | include/scsi/scsi_host.h | 69 | ||||
| -rw-r--r-- | include/scsi/scsi_tgt.h | 19 | ||||
| -rw-r--r-- | include/scsi/scsi_tgt_if.h | 90 | ||||
| -rw-r--r-- | include/scsi/scsi_transport_sas.h | 2 |
8 files changed, 288 insertions, 23 deletions
diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h index 1d77b63..44b2f82 100644 --- a/include/scsi/libsas.h +++ b/include/scsi/libsas.h @@ -339,6 +339,8 @@ struct sas_ha_struct { void (*notify_phy_event)(struct asd_sas_phy *, enum phy_event); void *lldd_ha; /* not touched by sas class code */ + + struct list_head eh_done_q; }; #define SHOST_TO_SAS_HA(_shost) (*(struct sas_ha_struct **)(_shost)->hostdata) @@ -527,13 +529,16 @@ struct sas_task { void *lldd_task; /* for use by LLDDs */ void *uldd_task; + + struct work_struct abort_work; }; -#define SAS_TASK_STATE_PENDING 1 -#define SAS_TASK_STATE_DONE 2 -#define SAS_TASK_STATE_ABORTED 4 +#define SAS_TASK_STATE_PENDING 1 +#define SAS_TASK_STATE_DONE 2 +#define SAS_TASK_STATE_ABORTED 4 +#define SAS_TASK_INITIATOR_ABORTED 8 static inline struct sas_task *sas_alloc_task(gfp_t flags) { @@ -593,6 +598,7 @@ struct sas_domain_function_template { extern int sas_register_ha(struct sas_ha_struct *); extern int sas_unregister_ha(struct sas_ha_struct *); +int sas_phy_reset(struct sas_phy *phy, int hard_reset); extern int sas_queuecommand(struct scsi_cmnd *, void (*scsi_done)(struct scsi_cmnd *)); extern int sas_target_alloc(struct scsi_target *); @@ -625,4 +631,6 @@ void sas_unregister_dev(struct domain_device *); void sas_init_dev(struct domain_device *); +void sas_task_abort(struct sas_task *task); + #endif /* _SASLIB_H_ */ diff --git a/include/scsi/libsrp.h b/include/scsi/libsrp.h new file mode 100644 index 0000000..d143171 --- /dev/null +++ b/include/scsi/libsrp.h @@ -0,0 +1,77 @@ +#ifndef __LIBSRP_H__ +#define __LIBSRP_H__ + +#include <linux/list.h> +#include <scsi/scsi_cmnd.h> +#include <scsi/scsi_host.h> +#include <scsi/srp.h> + +enum iue_flags { + V_DIOVER, + V_WRITE, + V_LINKED, + V_FLYING, +}; + +struct srp_buf { + dma_addr_t dma; + void *buf; +}; + +struct srp_queue { + void *pool; + void *items; + struct kfifo *queue; + spinlock_t lock; +}; + +struct srp_target { + struct Scsi_Host *shost; + struct device *dev; + + spinlock_t lock; + struct list_head cmd_queue; + + size_t srp_iu_size; + struct srp_queue iu_queue; + size_t rx_ring_size; + struct srp_buf **rx_ring; + + void *ldata; +}; + +struct iu_entry { + struct srp_target *target; + + struct list_head ilist; + dma_addr_t remote_token; + unsigned long flags; + + struct srp_buf *sbuf; +}; + +typedef int (srp_rdma_t)(struct scsi_cmnd *, struct scatterlist *, int, + struct srp_direct_buf *, int, + enum dma_data_direction, unsigned int); +extern int srp_target_alloc(struct srp_target *, struct device *, size_t, size_t); +extern void srp_target_free(struct srp_target *); + +extern struct iu_entry *srp_iu_get(struct srp_target *); +extern void srp_iu_put(struct iu_entry *); + +extern int srp_cmd_queue(struct Scsi_Host *, struct srp_cmd *, void *, u64); +extern int srp_transfer_data(struct scsi_cmnd *, struct srp_cmd *, + srp_rdma_t, int, int); + + +static inline struct srp_target *host_to_srp_target(struct Scsi_Host *host) +{ + return (struct srp_target *) host->hostdata; +} + +static inline int srp_cmd_direction(struct srp_cmd *cmd) +{ + return (cmd->buf_fmt >> 4) ? DMA_TO_DEVICE : DMA_FROM_DEVICE; +} + +#endif diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h index be117f8..d6948d0 100644 --- a/include/scsi/scsi_cmnd.h +++ b/include/scsi/scsi_cmnd.h @@ -8,6 +8,7 @@ struct request; struct scatterlist; +struct Scsi_Host; struct scsi_device; @@ -72,6 +73,9 @@ struct scsi_cmnd { unsigned short use_sg; /* Number of pieces of scatter-gather */ unsigned short sglist_len; /* size of malloc'd scatter-gather list */ + /* offset in cmd we are at (for multi-transfer tgt cmds) */ + unsigned offset; + unsigned underflow; /* Return error if less than this amount is transferred */ @@ -119,7 +123,10 @@ struct scsi_cmnd { }; extern struct scsi_cmnd *scsi_get_command(struct scsi_device *, gfp_t); +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); @@ -128,4 +135,7 @@ 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 void scsi_free_sgtable(struct scatterlist *, int); + #endif /* _SCSI_SCSI_CMND_H */ diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h index b401c82..ebf31b1 100644 --- a/include/scsi/scsi_device.h +++ b/include/scsi/scsi_device.h @@ -223,13 +223,13 @@ extern struct scsi_device *__scsi_iterate_devices(struct Scsi_Host *, struct scsi_device *); /** - * shost_for_each_device - iterate over all devices of a host - * @sdev: iterator - * @host: host whiches devices we want to iterate over + * shost_for_each_device - iterate over all devices of a host + * @sdev: the &struct scsi_device to use as a cursor + * @shost: the &struct scsi_host to iterate over * - * This traverses over each devices of @shost. The devices have - * a reference that must be released by scsi_host_put when breaking - * out of the loop. + * Iterator that returns each device attached to @shost. This loop + * takes a reference on each device and releases it at the end. If + * you break out of the loop, you must call scsi_device_put(sdev). */ #define shost_for_each_device(sdev, shost) \ for ((sdev) = __scsi_iterate_devices((shost), NULL); \ @@ -237,17 +237,17 @@ extern struct scsi_device *__scsi_iterate_devices(struct Scsi_Host *, (sdev) = __scsi_iterate_devices((shost), (sdev))) /** - * __shost_for_each_device - iterate over all devices of a host (UNLOCKED) - * @sdev: iterator - * @host: host whiches devices we want to iterate over + * __shost_for_each_device - iterate over all devices of a host (UNLOCKED) + * @sdev: the &struct scsi_device to use as a cursor + * @shost: the &struct scsi_host to iterate over * - * This traverses over each devices of @shost. It does _not_ take a - * reference on the scsi_device, thus it the whole loop must be protected - * by shost->host_lock. + * Iterator that returns each device attached to @shost. It does _not_ + * take a reference on the scsi_device, so the whole loop must be + * protected by shost->host_lock. * - * Note: The only reason why drivers would want to use this is because - * they're need to access the device list in irq context. Otherwise you - * really want to use shost_for_each_device instead. + * Note: The only reason to use this is because you need to access the + * device list in interrupt context. Otherwise you really want to use + * shost_for_each_device instead. */ #define __shost_for_each_device(sdev, shost) \ list_for_each_entry((sdev), &((shost)->__devices), siblings) diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h index 39c6f8c..7f1f411 100644 --- a/include/scsi/scsi_host.h +++ b/include/scsi/scsi_host.h @@ -7,6 +7,7 @@ #include <linux/workqueue.h> #include <linux/mutex.h> +struct request_queue; struct block_device; struct completion; struct module; @@ -124,6 +125,39 @@ struct scsi_host_template { void (*done)(struct scsi_cmnd *)); /* + * The transfer functions are used to queue a scsi command to + * the LLD. When the driver is finished processing the command + * the done callback is invoked. + * + * return values: see queuecommand + * + * If the LLD accepts the cmd, it should set the result to an + * appropriate value when completed before calling the done function. + * + * STATUS: REQUIRED FOR TARGET DRIVERS + */ + /* TODO: rename */ + int (* transfer_response)(struct scsi_cmnd *, + void (*done)(struct scsi_cmnd *)); + /* + * This is called to inform the LLD to transfer cmd->request_bufflen + * bytes of the cmd at cmd->offset in the cmd. The cmd->use_sg + * speciefies the number of scatterlist entried in the command + * and cmd->request_buffer contains the scatterlist. + * + * If the command cannot be processed in one transfer_data call + * becuase a scatterlist within the LLD's limits cannot be + * created then transfer_data will be called multiple times. + * It is initially called from process context, and later + * calls are from the interrup context. + */ + int (* transfer_data)(struct scsi_cmnd *, + void (*done)(struct scsi_cmnd *)); + + /* Used as callback for the completion of task management request. */ + int (* tsk_mgmt_response)(u64 mid, int result); + + /* * This is an error handling strategy routine. You don't need to * define one of these if you don't want to - there is a default * routine that is present that should work in most cases. For those @@ -241,6 +275,24 @@ struct scsi_host_template { void (* target_destroy)(struct scsi_target *); /* + * If a host has the ability to discover targets on its own instead + * of scanning the entire bus, it can fill in this function and + * call scsi_scan_host(). This function will be called periodically + * until it returns 1 with the scsi_host and the elapsed time of + * the scan in jiffies. + * + * Status: OPTIONAL + */ + int (* scan_finished)(struct Scsi_Host *, unsigned long); + + /* + * If the host wants to be called before the scan starts, but + * after the midlayer has set up ready for the scan, it can fill + * in this function. + */ + void (* scan_start)(struct Scsi_Host *); + + /* * fill in this function to allow the queue depth of this host * to be changeable (on a per device basis). returns either * the current queue depth setting (may be different from what @@ -552,6 +604,9 @@ struct Scsi_Host { /* task mgmt function in progress */ unsigned tmf_in_progress:1; + /* Asynchronous scan in progress */ + unsigned async_scan:1; + /* * Optional work queue to be utilized by the transport */ @@ -568,6 +623,12 @@ struct Scsi_Host { */ unsigned int max_host_blocked; + /* + * q used for scsi_tgt msgs, async events or any other requests that + * need to be processed in userspace + */ + struct request_queue *uspace_req_q; + /* legacy crap */ unsigned long base; unsigned long io_port; @@ -648,11 +709,6 @@ extern const char *scsi_host_state_name(enum scsi_host_state); extern u64 scsi_calculate_bounce_limit(struct Scsi_Host *); -static inline void scsi_assign_lock(struct Scsi_Host *shost, spinlock_t *lock) -{ - shost->host_lock = lock; -} - static inline struct device *scsi_get_device(struct Scsi_Host *shost) { return shost->shost_gendev.parent; @@ -671,6 +727,9 @@ extern void scsi_unblock_requests(struct Scsi_Host *); extern void scsi_block_requests(struct Scsi_Host *); struct class_container; + +extern struct request_queue *__scsi_alloc_queue(struct Scsi_Host *shost, + void (*) (struct request_queue *)); /* * These two functions are used to allocate and free a pseudo device * which will connect to the host adapter itself rather than any diff --git a/include/scsi/scsi_tgt.h b/include/scsi/scsi_tgt.h new file mode 100644 index 0000000..4f44279 --- /dev/null +++ b/include/scsi/scsi_tgt.h @@ -0,0 +1,19 @@ +/* + * SCSI target definitions + */ + +#include <linux/dma-mapping.h> + +struct Scsi_Host; +struct scsi_cmnd; +struct scsi_lun; + +extern struct Scsi_Host *scsi_tgt_cmd_to_host(struct scsi_cmnd *); +extern int scsi_tgt_alloc_queue(struct Scsi_Host *); +extern void scsi_tgt_free_queue(struct Scsi_Host *); +extern int scsi_tgt_queue_command(struct scsi_cmnd *, struct scsi_lun *, u64); +extern int scsi_tgt_tsk_mgmt_request(struct Scsi_Host *, int, u64, struct scsi_lun *, + void *); +extern struct scsi_cmnd *scsi_host_get_command(struct Scsi_Host *, + enum dma_data_direction, gfp_t); +extern void scsi_host_put_command(struct Scsi_Host *, struct scsi_cmnd *); diff --git a/include/scsi/scsi_tgt_if.h b/include/scsi/scsi_tgt_if.h new file mode 100644 index 0000000..46d5e70 --- /dev/null +++ b/include/scsi/scsi_tgt_if.h @@ -0,0 +1,90 @@ +/* + * SCSI target kernel/user interface + * + * Copyright (C) 2005 FUJITA Tomonori <tomof@acm.org> + * Copyright (C) 2005 Mike Christie <michaelc@cs.wisc.edu> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of the + * License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA + * 02110-1301 USA + */ +#ifndef __SCSI_TARGET_IF_H +#define __SCSI_TARGET_IF_H + +/* user -> kernel */ +#define TGT_UEVENT_CMD_RSP 0x0001 +#define TGT_UEVENT_TSK_MGMT_RSP 0x0002 + +/* kernel -> user */ +#define TGT_KEVENT_CMD_REQ 0x1001 +#define TGT_KEVENT_CMD_DONE 0x1002 +#define TGT_KEVENT_TSK_MGMT_REQ 0x1003 + +struct tgt_event_hdr { + uint16_t version; + uint16_t status; + uint16_t type; + uint16_t len; +} __attribute__ ((aligned (sizeof(uint64_t)))); + +struct tgt_event { + struct tgt_event_hdr hdr; + + union { + /* user-> kernel */ + struct { + int host_no; + uint32_t len; + int result; + aligned_u64 uaddr; + uint8_t rw; + aligned_u64 tag; + } cmd_rsp; + struct { + int host_no; + aligned_u64 mid; + int result; + } tsk_mgmt_rsp; + + + /* kernel -> user */ + struct { + int host_no; + uint32_t data_len; + uint8_t scb[16]; + uint8_t lun[8]; + int attribute; + aligned_u64 tag; + } cmd_req; + struct { + int host_no; + aligned_u64 tag; + int result; + } cmd_done; + struct { + int host_no; + int function; + aligned_u64 tag; + uint8_t lun[8]; + aligned_u64 mid; + } tsk_mgmt_req; + } p; +} __attribute__ ((aligned (sizeof(uint64_t)))); + +#define TGT_RING_SIZE (1UL << 16) +#define TGT_RING_PAGES (TGT_RING_SIZE >> PAGE_SHIFT) +#define TGT_EVENT_PER_PAGE (PAGE_SIZE / sizeof(struct tgt_event)) +#define TGT_MAX_EVENTS (TGT_EVENT_PER_PAGE * TGT_RING_PAGES) + +#endif diff --git a/include/scsi/scsi_transport_sas.h b/include/scsi/scsi_transport_sas.h index 5302437..59633a8 100644 --- a/include/scsi/scsi_transport_sas.h +++ b/include/scsi/scsi_transport_sas.h @@ -73,6 +73,8 @@ struct sas_phy { /* for the list of phys belonging to a port */ struct list_head port_siblings; + + struct work_struct reset_work; }; #define dev_to_phy(d) \ |