isci: Redesign device suspension, abort, cleanup.
This commit changes the means by which outstanding I/Os are handled
for cleanup.
The likelihood is that this commit will be broken into smaller pieces,
however that will be a later revision. Among the changes:
- All completion structures have been removed from the tmf and
abort paths.
- Now using one completed I/O list, with the I/O completed in host bit being
used to select error or normal callback paths.
Signed-off-by: Jeff Skirvin <jeffrey.d.skirvin@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
diff --git a/drivers/scsi/isci/request.h b/drivers/scsi/isci/request.h
index 8d55f78..f3116a5 100644
--- a/drivers/scsi/isci/request.h
+++ b/drivers/scsi/isci/request.h
@@ -61,23 +61,6 @@
#include "scu_task_context.h"
/**
- * struct isci_request_status - This enum defines the possible states of an I/O
- * request.
- *
- *
- */
-enum isci_request_status {
- unallocated = 0x00,
- allocated = 0x01,
- started = 0x02,
- completed = 0x03,
- aborting = 0x04,
- aborted = 0x05,
- terminating = 0x06,
- dead = 0x07
-};
-
-/**
* isci_stp_request - extra request infrastructure to handle pio/atapi protocol
* @pio_len - number of bytes requested at PIO setup
* @status - pio setup ending status value to tell us if we need
@@ -97,13 +80,13 @@
};
struct isci_request {
- enum isci_request_status status;
#define IREQ_COMPLETE_IN_TARGET 0
#define IREQ_TERMINATED 1
#define IREQ_TMF 2
#define IREQ_ACTIVE 3
#define IREQ_PENDING_ABORT 4 /* Set == device was not suspended yet */
#define IREQ_TC_ABORT_POSTED 5
+ #define IREQ_ABORT_PATH_ACTIVE 6
unsigned long flags;
/* XXX kill ttype and ttype_ptr, allocate full sas_task */
union ttype_ptr_union {
@@ -115,7 +98,6 @@
struct list_head completed_node;
/* For use in the reqs_in_process list: */
struct list_head dev_node;
- spinlock_t state_lock;
dma_addr_t request_daddr;
dma_addr_t zero_scatter_daddr;
unsigned int num_sg_entries;
@@ -304,92 +286,6 @@
return ireq->request_daddr + (requested_addr - base_addr);
}
-/**
- * isci_request_change_state() - This function sets the status of the request
- * object.
- * @request: This parameter points to the isci_request object
- * @status: This Parameter is the new status of the object
- *
- */
-static inline enum isci_request_status
-isci_request_change_state(struct isci_request *isci_request,
- enum isci_request_status status)
-{
- enum isci_request_status old_state;
- unsigned long flags;
-
- dev_dbg(&isci_request->isci_host->pdev->dev,
- "%s: isci_request = %p, state = 0x%x\n",
- __func__,
- isci_request,
- status);
-
- BUG_ON(isci_request == NULL);
-
- spin_lock_irqsave(&isci_request->state_lock, flags);
- old_state = isci_request->status;
- isci_request->status = status;
- spin_unlock_irqrestore(&isci_request->state_lock, flags);
-
- return old_state;
-}
-
-/**
- * isci_request_change_started_to_newstate() - This function sets the status of
- * the request object.
- * @request: This parameter points to the isci_request object
- * @status: This Parameter is the new status of the object
- *
- * state previous to any change.
- */
-static inline enum isci_request_status
-isci_request_change_started_to_newstate(struct isci_request *isci_request,
- struct completion *completion_ptr,
- enum isci_request_status newstate)
-{
- enum isci_request_status old_state;
- unsigned long flags;
-
- spin_lock_irqsave(&isci_request->state_lock, flags);
-
- old_state = isci_request->status;
-
- if (old_state == started || old_state == aborting) {
- BUG_ON(isci_request->io_request_completion != NULL);
-
- isci_request->io_request_completion = completion_ptr;
- isci_request->status = newstate;
- }
-
- spin_unlock_irqrestore(&isci_request->state_lock, flags);
-
- dev_dbg(&isci_request->isci_host->pdev->dev,
- "%s: isci_request = %p, old_state = 0x%x\n",
- __func__,
- isci_request,
- old_state);
-
- return old_state;
-}
-
-/**
- * isci_request_change_started_to_aborted() - This function sets the status of
- * the request object.
- * @request: This parameter points to the isci_request object
- * @completion_ptr: This parameter is saved as the kernel completion structure
- * signalled when the old request completes.
- *
- * state previous to any change.
- */
-static inline enum isci_request_status
-isci_request_change_started_to_aborted(struct isci_request *isci_request,
- struct completion *completion_ptr)
-{
- return isci_request_change_started_to_newstate(isci_request,
- completion_ptr,
- aborted);
-}
-
#define isci_request_access_task(req) ((req)->ttype_ptr.io_task_ptr)
#define isci_request_access_tmf(req) ((req)->ttype_ptr.tmf_task_ptr)
@@ -399,8 +295,6 @@
u16 tag);
int isci_request_execute(struct isci_host *ihost, struct isci_remote_device *idev,
struct sas_task *task, u16 tag);
-void isci_terminate_pending_requests(struct isci_host *ihost,
- struct isci_remote_device *idev);
enum sci_status
sci_task_request_construct(struct isci_host *ihost,
struct isci_remote_device *idev,