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linux/drivers/scsi/qla2xxx/qla_rscn.c

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/*
* QLogic Fibre Channel HBA Driver
* Copyright (c) 2003-2005 QLogic Corporation
*
* See LICENSE.qla2xxx for copyright and licensing details.
*/
#include "qla_def.h"
/**
* IO descriptor handle definitions.
*
* Signature form:
*
* |31------28|27-------------------12|11-------0|
* | Type | Rolling Signature | Index |
* |----------|-----------------------|----------|
*
**/
#define HDL_TYPE_SCSI 0
#define HDL_TYPE_ASYNC_IOCB 0x0A
#define HDL_INDEX_BITS 12
#define HDL_ITER_BITS 16
#define HDL_TYPE_BITS 4
#define HDL_INDEX_MASK ((1UL << HDL_INDEX_BITS) - 1)
#define HDL_ITER_MASK ((1UL << HDL_ITER_BITS) - 1)
#define HDL_TYPE_MASK ((1UL << HDL_TYPE_BITS) - 1)
#define HDL_INDEX_SHIFT 0
#define HDL_ITER_SHIFT (HDL_INDEX_SHIFT + HDL_INDEX_BITS)
#define HDL_TYPE_SHIFT (HDL_ITER_SHIFT + HDL_ITER_BITS)
/* Local Prototypes. */
static inline uint32_t qla2x00_to_handle(uint16_t, uint16_t, uint16_t);
static inline uint16_t qla2x00_handle_to_idx(uint32_t);
static inline uint32_t qla2x00_iodesc_to_handle(struct io_descriptor *);
static inline struct io_descriptor *qla2x00_handle_to_iodesc(scsi_qla_host_t *,
uint32_t);
static inline struct io_descriptor *qla2x00_alloc_iodesc(scsi_qla_host_t *);
static inline void qla2x00_free_iodesc(struct io_descriptor *);
static inline void qla2x00_init_io_descriptors(scsi_qla_host_t *);
static void qla2x00_iodesc_timeout(unsigned long);
static inline void qla2x00_add_iodesc_timer(struct io_descriptor *);
static inline void qla2x00_remove_iodesc_timer(struct io_descriptor *);
static inline void qla2x00_update_login_fcport(scsi_qla_host_t *,
struct mbx_entry *, fc_port_t *);
static int qla2x00_send_abort_iocb(scsi_qla_host_t *, struct io_descriptor *,
uint32_t, int);
static int qla2x00_send_abort_iocb_cb(scsi_qla_host_t *, struct io_descriptor *,
struct mbx_entry *);
static int qla2x00_send_adisc_iocb(scsi_qla_host_t *, struct io_descriptor *,
int);
static int qla2x00_send_adisc_iocb_cb(scsi_qla_host_t *, struct io_descriptor *,
struct mbx_entry *);
static int qla2x00_send_logout_iocb(scsi_qla_host_t *, struct io_descriptor *,
int);
static int qla2x00_send_logout_iocb_cb(scsi_qla_host_t *,
struct io_descriptor *, struct mbx_entry *);
static int qla2x00_send_login_iocb(scsi_qla_host_t *, struct io_descriptor *,
port_id_t *, int);
static int qla2x00_send_login_iocb_cb(scsi_qla_host_t *, struct io_descriptor *,
struct mbx_entry *);
/**
* Mailbox IOCB callback array.
**/
static int (*iocb_function_cb_list[LAST_IOCB_CB])
(scsi_qla_host_t *, struct io_descriptor *, struct mbx_entry *) = {
qla2x00_send_abort_iocb_cb,
qla2x00_send_adisc_iocb_cb,
qla2x00_send_logout_iocb_cb,
qla2x00_send_login_iocb_cb,
};
/**
* Generic IO descriptor handle routines.
**/
/**
* qla2x00_to_handle() - Create a descriptor handle.
* @type: descriptor type
* @iter: descriptor rolling signature
* @idx: index to the descriptor array
*
* Returns a composite handle based in the @type, @iter, and @idx.
*/
static inline uint32_t
qla2x00_to_handle(uint16_t type, uint16_t iter, uint16_t idx)
{
return ((uint32_t)(((uint32_t)type << HDL_TYPE_SHIFT) |
((uint32_t)iter << HDL_ITER_SHIFT) |
((uint32_t)idx << HDL_INDEX_SHIFT)));
}
/**
* qla2x00_handle_to_idx() - Retrive the index for a given handle.
* @handle: descriptor handle
*
* Returns the index specified by the @handle.
*/
static inline uint16_t
qla2x00_handle_to_idx(uint32_t handle)
{
return ((uint16_t)(((handle) >> HDL_INDEX_SHIFT) & HDL_INDEX_MASK));
}
/**
* qla2x00_iodesc_to_handle() - Convert an IO descriptor to a unique handle.
* @iodesc: io descriptor
*
* Returns a unique handle for @iodesc.
*/
static inline uint32_t
qla2x00_iodesc_to_handle(struct io_descriptor *iodesc)
{
uint32_t handle;
handle = qla2x00_to_handle(HDL_TYPE_ASYNC_IOCB,
++iodesc->ha->iodesc_signature, iodesc->idx);
iodesc->signature = handle;
return (handle);
}
/**
* qla2x00_handle_to_iodesc() - Retrieve an IO descriptor given a unique handle.
* @ha: HA context
* @handle: handle to io descriptor
*
* Returns a pointer to the io descriptor, or NULL, if the io descriptor does
* not exist or the io descriptors signature does not @handle.
*/
static inline struct io_descriptor *
qla2x00_handle_to_iodesc(scsi_qla_host_t *ha, uint32_t handle)
{
uint16_t idx;
struct io_descriptor *iodesc;
idx = qla2x00_handle_to_idx(handle);
iodesc = &ha->io_descriptors[idx];
if (iodesc)
if (iodesc->signature != handle)
iodesc = NULL;
return (iodesc);
}
/**
* IO descriptor allocation routines.
**/
/**
* qla2x00_alloc_iodesc() - Allocate an IO descriptor from the pool.
* @ha: HA context
*
* Returns a pointer to the allocated io descriptor, or NULL, if none available.
*/
static inline struct io_descriptor *
qla2x00_alloc_iodesc(scsi_qla_host_t *ha)
{
uint16_t iter;
struct io_descriptor *iodesc;
iodesc = NULL;
for (iter = 0; iter < MAX_IO_DESCRIPTORS; iter++) {
if (ha->io_descriptors[iter].used)
continue;
iodesc = &ha->io_descriptors[iter];
iodesc->used = 1;
iodesc->idx = iter;
init_timer(&iodesc->timer);
iodesc->ha = ha;
iodesc->signature = qla2x00_iodesc_to_handle(iodesc);
break;
}
return (iodesc);
}
/**
* qla2x00_free_iodesc() - Free an IO descriptor.
* @iodesc: io descriptor
*
* NOTE: The io descriptors timer *must* be stopped before it can be free'd.
*/
static inline void
qla2x00_free_iodesc(struct io_descriptor *iodesc)
{
iodesc->used = 0;
iodesc->signature = 0;
}
/**
* qla2x00_remove_iodesc_timer() - Remove an active timer from an IO descriptor.
* @iodesc: io descriptor
*/
static inline void
qla2x00_remove_iodesc_timer(struct io_descriptor *iodesc)
{
if (iodesc->timer.function != NULL) {
del_timer_sync(&iodesc->timer);
iodesc->timer.data = (unsigned long) NULL;
iodesc->timer.function = NULL;
}
}
/**
* qla2x00_init_io_descriptors() - Initialize the pool of IO descriptors.
* @ha: HA context
*/
static inline void
qla2x00_init_io_descriptors(scsi_qla_host_t *ha)
{
uint16_t iter;
for (iter = 0; iter < MAX_IO_DESCRIPTORS; iter++) {
if (!ha->io_descriptors[iter].used)
continue;
qla2x00_remove_iodesc_timer(&ha->io_descriptors[iter]);
qla2x00_free_iodesc(&ha->io_descriptors[iter]);
}
}
/**
* IO descriptor timer routines.
**/
/**
* qla2x00_iodesc_timeout() - Timeout IO descriptor handler.
* @data: io descriptor
*/
static void
qla2x00_iodesc_timeout(unsigned long data)
{
struct io_descriptor *iodesc;
iodesc = (struct io_descriptor *) data;
DEBUG14(printk("scsi(%ld): IO descriptor timeout, index=%x "
"signature=%08x, scheduling ISP abort.\n", iodesc->ha->host_no,
iodesc->idx, iodesc->signature));
qla2x00_free_iodesc(iodesc);
qla_printk(KERN_WARNING, iodesc->ha,
"IO descriptor timeout. Scheduling ISP abort.\n");
set_bit(ISP_ABORT_NEEDED, &iodesc->ha->dpc_flags);
}
/**
* qla2x00_add_iodesc_timer() - Add and start a timer for an IO descriptor.
* @iodesc: io descriptor
*
* NOTE:
* The firmware shall timeout an outstanding mailbox IOCB in 2 * R_A_TOV (in
* tenths of a second) after it hits the wire. But, if there are any request
* resource contraints (i.e. during heavy I/O), exchanges can be held off for
* at most R_A_TOV. Therefore, the driver will wait 4 * R_A_TOV before
* scheduling a recovery (big hammer).
*/
static inline void
qla2x00_add_iodesc_timer(struct io_descriptor *iodesc)
{
unsigned long timeout;
timeout = (iodesc->ha->r_a_tov * 4) / 10;
init_timer(&iodesc->timer);
iodesc->timer.data = (unsigned long) iodesc;
iodesc->timer.expires = jiffies + (timeout * HZ);
iodesc->timer.function =
(void (*) (unsigned long)) qla2x00_iodesc_timeout;
add_timer(&iodesc->timer);
}
/**
* IO descriptor support routines.
**/
/**
* qla2x00_update_login_fcport() - Update fcport data after login processing.
* @ha: HA context
* @mbxstat: Mailbox command status IOCB
* @fcport: port to update
*/
static inline void
qla2x00_update_login_fcport(scsi_qla_host_t *ha, struct mbx_entry *mbxstat,
fc_port_t *fcport)
{
if (le16_to_cpu(mbxstat->mb1) & BIT_0) {
fcport->port_type = FCT_INITIATOR;
} else {
fcport->port_type = FCT_TARGET;
if (le16_to_cpu(mbxstat->mb1) & BIT_1) {
fcport->flags |= FCF_TAPE_PRESENT;
}
}
fcport->login_retry = 0;
fcport->port_login_retry_count = ha->port_down_retry_count *
PORT_RETRY_TIME;
atomic_set(&fcport->port_down_timer, ha->port_down_retry_count *
PORT_RETRY_TIME);
fcport->flags |= FCF_FABRIC_DEVICE;
fcport->flags &= ~FCF_FAILOVER_NEEDED;
fcport->iodesc_idx_sent = IODESC_INVALID_INDEX;
atomic_set(&fcport->state, FCS_ONLINE);
schedule_work(&fcport->rport_add_work);
}
/**
* Mailbox IOCB commands.
**/
/**
* qla2x00_get_mbx_iocb_entry() - Retrieve an IOCB from the request queue.
* @ha: HA context
* @handle: handle to io descriptor
*
* Returns a pointer to the reqest entry, or NULL, if none were available.
*/
static inline struct mbx_entry *
qla2x00_get_mbx_iocb_entry(scsi_qla_host_t *ha, uint32_t handle)
{
uint16_t cnt;
struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
struct mbx_entry *mbxentry;
mbxentry = NULL;
if (ha->req_q_cnt < 3) {
cnt = qla2x00_debounce_register(ISP_REQ_Q_OUT(ha, reg));
if (ha->req_ring_index < cnt)
ha->req_q_cnt = cnt - ha->req_ring_index;
else
ha->req_q_cnt = ha->request_q_length -
(ha->req_ring_index - cnt);
}
if (ha->req_q_cnt >= 3) {
mbxentry = (struct mbx_entry *)ha->request_ring_ptr;
memset(mbxentry, 0, sizeof(struct mbx_entry));
mbxentry->entry_type = MBX_IOCB_TYPE;
mbxentry->entry_count = 1;
mbxentry->sys_define1 = SOURCE_ASYNC_IOCB;
mbxentry->handle = handle;
}
return (mbxentry);
}
/**
* qla2x00_send_abort_iocb() - Issue an abort IOCB to the firmware.
* @ha: HA context
* @iodesc: io descriptor
* @handle_to_abort: firmware handle to abort
* @ha_locked: is function called with the hardware lock
*
* Returns QLA_SUCCESS if the IOCB was issued.
*/
static int
qla2x00_send_abort_iocb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
uint32_t handle_to_abort, int ha_locked)
{
unsigned long flags = 0;
struct mbx_entry *mbxentry;
/* Send marker if required. */
if (qla2x00_issue_marker(ha, ha_locked) != QLA_SUCCESS)
return (QLA_FUNCTION_FAILED);
if (!ha_locked)
spin_lock_irqsave(&ha->hardware_lock, flags);
/* Build abort mailbox IOCB. */
mbxentry = qla2x00_get_mbx_iocb_entry(ha, iodesc->signature);
if (mbxentry == NULL) {
if (!ha_locked)
spin_unlock_irqrestore(&ha->hardware_lock, flags);
return (QLA_FUNCTION_FAILED);
}
mbxentry->mb0 = __constant_cpu_to_le16(MBC_ABORT_COMMAND);
mbxentry->mb1 = mbxentry->loop_id.extended =
cpu_to_le16(iodesc->remote_fcport->loop_id);
mbxentry->mb2 = LSW(handle_to_abort);
mbxentry->mb3 = MSW(handle_to_abort);
wmb();
qla2x00_add_iodesc_timer(iodesc);
/* Issue command to ISP. */
qla2x00_isp_cmd(ha);
if (!ha_locked)
spin_unlock_irqrestore(&ha->hardware_lock, flags);
DEBUG14(printk("scsi(%ld): Sending Abort IOCB (%08x) to [%x], aborting "
"%08x.\n", ha->host_no, iodesc->signature,
iodesc->remote_fcport->loop_id, handle_to_abort));
return (QLA_SUCCESS);
}
/**
* qla2x00_send_abort_iocb_cb() - Abort IOCB callback.
* @ha: HA context
* @iodesc: io descriptor
* @mbxstat: mailbox status IOCB
*
* Returns QLA_SUCCESS if @iodesc can be freed by the caller, else, @iodesc
* will be used for a retry.
*/
static int
qla2x00_send_abort_iocb_cb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
struct mbx_entry *mbxstat)
{
DEBUG14(printk("scsi(%ld): Abort IOCB -- sent to [%x/%02x%02x%02x], "
"status=%x mb0=%x.\n", ha->host_no, iodesc->remote_fcport->loop_id,
iodesc->d_id.b.domain, iodesc->d_id.b.area, iodesc->d_id.b.al_pa,
le16_to_cpu(mbxstat->status), le16_to_cpu(mbxstat->mb0)));
return (QLA_SUCCESS);
}
/**
* qla2x00_send_adisc_iocb() - Issue a Get Port Database IOCB to the firmware.
* @ha: HA context
* @iodesc: io descriptor
* @ha_locked: is function called with the hardware lock
*
* Returns QLA_SUCCESS if the IOCB was issued.
*/
static int
qla2x00_send_adisc_iocb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
int ha_locked)
{
unsigned long flags = 0;
struct mbx_entry *mbxentry;
/* Send marker if required. */
if (qla2x00_issue_marker(ha, ha_locked) != QLA_SUCCESS)
return (QLA_FUNCTION_FAILED);
if (!ha_locked)
spin_lock_irqsave(&ha->hardware_lock, flags);
/* Build Get Port Database IOCB. */
mbxentry = qla2x00_get_mbx_iocb_entry(ha, iodesc->signature);
if (mbxentry == NULL) {
if (!ha_locked)
spin_unlock_irqrestore(&ha->hardware_lock, flags);
return (QLA_FUNCTION_FAILED);
}
mbxentry->mb0 = __constant_cpu_to_le16(MBC_GET_PORT_DATABASE);
mbxentry->mb1 = mbxentry->loop_id.extended =
cpu_to_le16(iodesc->remote_fcport->loop_id);
mbxentry->mb2 = cpu_to_le16(MSW(LSD(ha->iodesc_pd_dma)));
mbxentry->mb3 = cpu_to_le16(LSW(LSD(ha->iodesc_pd_dma)));
mbxentry->mb6 = cpu_to_le16(MSW(MSD(ha->iodesc_pd_dma)));
mbxentry->mb7 = cpu_to_le16(LSW(MSD(ha->iodesc_pd_dma)));
mbxentry->mb10 = __constant_cpu_to_le16(BIT_0);
wmb();
qla2x00_add_iodesc_timer(iodesc);
/* Issue command to ISP. */
qla2x00_isp_cmd(ha);
if (!ha_locked)
spin_unlock_irqrestore(&ha->hardware_lock, flags);
DEBUG14(printk("scsi(%ld): Sending Adisc IOCB (%08x) to [%x].\n",
ha->host_no, iodesc->signature, iodesc->remote_fcport->loop_id));
return (QLA_SUCCESS);
}
/**
* qla2x00_send_adisc_iocb_cb() - Get Port Database IOCB callback.
* @ha: HA context
* @iodesc: io descriptor
* @mbxstat: mailbox status IOCB
*
* Returns QLA_SUCCESS if @iodesc can be freed by the caller, else, @iodesc
* will be used for a retry.
*/
static int
qla2x00_send_adisc_iocb_cb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
struct mbx_entry *mbxstat)
{
fc_port_t *remote_fcport;
remote_fcport = iodesc->remote_fcport;
/* Ensure the port IDs are consistent. */
if (remote_fcport->d_id.b24 != iodesc->d_id.b24) {
DEBUG14(printk("scsi(%ld): Adisc IOCB -- ignoring, remote port "
"id changed from [%02x%02x%02x] to [%02x%02x%02x].\n",
ha->host_no, remote_fcport->d_id.b.domain,
remote_fcport->d_id.b.area, remote_fcport->d_id.b.al_pa,
iodesc->d_id.b.domain, iodesc->d_id.b.area,
iodesc->d_id.b.al_pa));
return (QLA_SUCCESS);
}
/* Only process the last command. */
if (remote_fcport->iodesc_idx_sent != iodesc->idx) {
DEBUG14(printk("scsi(%ld): Adisc IOCB -- ignoring, sent to "
"[%02x%02x%02x], expected %x, received %x.\n", ha->host_no,
iodesc->d_id.b.domain, iodesc->d_id.b.area,
iodesc->d_id.b.al_pa, remote_fcport->iodesc_idx_sent,
iodesc->idx));
return (QLA_SUCCESS);
}
if (le16_to_cpu(mbxstat->status) == CS_COMPLETE) {
DEBUG14(printk("scsi(%ld): Adisc IOCB -- marking "
"[%x/%02x%02x%02x] online.\n", ha->host_no,
remote_fcport->loop_id, remote_fcport->d_id.b.domain,
remote_fcport->d_id.b.area, remote_fcport->d_id.b.al_pa));
atomic_set(&remote_fcport->state, FCS_ONLINE);
} else {
DEBUG14(printk("scsi(%ld): Adisc IOCB -- marking "
"[%x/%02x%02x%02x] lost, status=%x mb0=%x.\n", ha->host_no,
remote_fcport->loop_id, remote_fcport->d_id.b.domain,
remote_fcport->d_id.b.area, remote_fcport->d_id.b.al_pa,
le16_to_cpu(mbxstat->status), le16_to_cpu(mbxstat->mb0)));
if (atomic_read(&remote_fcport->state) != FCS_DEVICE_DEAD)
atomic_set(&remote_fcport->state, FCS_DEVICE_LOST);
}
remote_fcport->iodesc_idx_sent = IODESC_INVALID_INDEX;
return (QLA_SUCCESS);
}
/**
* qla2x00_send_logout_iocb() - Issue a fabric port logout IOCB to the firmware.
* @ha: HA context
* @iodesc: io descriptor
* @ha_locked: is function called with the hardware lock
*
* Returns QLA_SUCCESS if the IOCB was issued.
*/
static int
qla2x00_send_logout_iocb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
int ha_locked)
{
unsigned long flags = 0;
struct mbx_entry *mbxentry;
/* Send marker if required. */
if (qla2x00_issue_marker(ha, ha_locked) != QLA_SUCCESS)
return (QLA_FUNCTION_FAILED);
if (!ha_locked)
spin_lock_irqsave(&ha->hardware_lock, flags);
/* Build fabric port logout mailbox IOCB. */
mbxentry = qla2x00_get_mbx_iocb_entry(ha, iodesc->signature);
if (mbxentry == NULL) {
if (!ha_locked)
spin_unlock_irqrestore(&ha->hardware_lock, flags);
return (QLA_FUNCTION_FAILED);
}
mbxentry->mb0 = __constant_cpu_to_le16(MBC_LOGOUT_FABRIC_PORT);
mbxentry->mb1 = mbxentry->loop_id.extended =
cpu_to_le16(iodesc->remote_fcport->loop_id);
wmb();
qla2x00_add_iodesc_timer(iodesc);
/* Issue command to ISP. */
qla2x00_isp_cmd(ha);
if (!ha_locked)
spin_unlock_irqrestore(&ha->hardware_lock, flags);
DEBUG14(printk("scsi(%ld): Sending Logout IOCB (%08x) to [%x].\n",
ha->host_no, iodesc->signature, iodesc->remote_fcport->loop_id));
return (QLA_SUCCESS);
}
/**
* qla2x00_send_logout_iocb_cb() - Fabric port logout IOCB callback.
* @ha: HA context
* @iodesc: io descriptor
* @mbxstat: mailbox status IOCB
*
* Returns QLA_SUCCESS if @iodesc can be freed by the caller, else, @iodesc
* will be used for a retry.
*/
static int
qla2x00_send_logout_iocb_cb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
struct mbx_entry *mbxstat)
{
DEBUG14(printk("scsi(%ld): Logout IOCB -- sent to [%x/%02x%02x%02x], "
"status=%x mb0=%x mb1=%x.\n", ha->host_no,
iodesc->remote_fcport->loop_id,
iodesc->remote_fcport->d_id.b.domain,
iodesc->remote_fcport->d_id.b.area,
iodesc->remote_fcport->d_id.b.al_pa, le16_to_cpu(mbxstat->status),
le16_to_cpu(mbxstat->mb0), le16_to_cpu(mbxstat->mb1)));
return (QLA_SUCCESS);
}
/**
* qla2x00_send_login_iocb() - Issue a fabric port login IOCB to the firmware.
* @ha: HA context
* @iodesc: io descriptor
* @d_id: port id for device
* @ha_locked: is function called with the hardware lock
*
* Returns QLA_SUCCESS if the IOCB was issued.
*/
static int
qla2x00_send_login_iocb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
port_id_t *d_id, int ha_locked)
{
unsigned long flags = 0;
struct mbx_entry *mbxentry;
/* Send marker if required. */
if (qla2x00_issue_marker(ha, ha_locked) != QLA_SUCCESS)
return (QLA_FUNCTION_FAILED);
if (!ha_locked)
spin_lock_irqsave(&ha->hardware_lock, flags);
/* Build fabric port login mailbox IOCB. */
mbxentry = qla2x00_get_mbx_iocb_entry(ha, iodesc->signature);
if (mbxentry == NULL) {
if (!ha_locked)
spin_unlock_irqrestore(&ha->hardware_lock, flags);
return (QLA_FUNCTION_FAILED);
}
mbxentry->mb0 = __constant_cpu_to_le16(MBC_LOGIN_FABRIC_PORT);
mbxentry->mb1 = mbxentry->loop_id.extended =
cpu_to_le16(iodesc->remote_fcport->loop_id);
mbxentry->mb2 = cpu_to_le16(d_id->b.domain);
mbxentry->mb3 = cpu_to_le16(d_id->b.area << 8 | d_id->b.al_pa);
mbxentry->mb10 = __constant_cpu_to_le16(BIT_0);
wmb();
qla2x00_add_iodesc_timer(iodesc);
/* Issue command to ISP. */
qla2x00_isp_cmd(ha);
if (!ha_locked)
spin_unlock_irqrestore(&ha->hardware_lock, flags);
DEBUG14(printk("scsi(%ld): Sending Login IOCB (%08x) to "
"[%x/%02x%02x%02x].\n", ha->host_no, iodesc->signature,
iodesc->remote_fcport->loop_id, d_id->b.domain, d_id->b.area,
d_id->b.al_pa));
return (QLA_SUCCESS);
}
/**
* qla2x00_send_login_iocb_cb() - Fabric port logout IOCB callback.
* @ha: HA context
* @iodesc: io descriptor
* @mbxstat: mailbox status IOCB
*
* Returns QLA_SUCCESS if @iodesc can be freed by the caller, else, @iodesc
* will be used for a retry.
*/
static int
qla2x00_send_login_iocb_cb(scsi_qla_host_t *ha, struct io_descriptor *iodesc,
struct mbx_entry *mbxstat)
{
int rval;
fc_port_t *fcport, *remote_fcport, *exist_fcport;
struct io_descriptor *abort_iodesc, *login_iodesc;
uint16_t status, mb[8];
uint16_t reuse;
uint16_t remote_loopid;
port_id_t remote_did, inuse_did;
remote_fcport = iodesc->remote_fcport;
/* Only process the last command. */
if (remote_fcport->iodesc_idx_sent != iodesc->idx) {
DEBUG14(printk("scsi(%ld): Login IOCB -- ignoring, sent to "
"[%02x%02x%02x], expected %x, received %x.\n",
ha->host_no, iodesc->d_id.b.domain, iodesc->d_id.b.area,
iodesc->d_id.b.al_pa, remote_fcport->iodesc_idx_sent,
iodesc->idx));
/* Free RSCN fcport resources. */
if (remote_fcport->port_type == FCT_RSCN) {
DEBUG14(printk("scsi(%ld): Login IOCB -- Freeing RSCN "
"fcport %p [%x/%02x%02x%02x] given ignored Login "
"IOCB.\n", ha->host_no, remote_fcport,
remote_fcport->loop_id,
remote_fcport->d_id.b.domain,
remote_fcport->d_id.b.area,
remote_fcport->d_id.b.al_pa));
list_del(&remote_fcport->list);
kfree(remote_fcport);
}
return (QLA_SUCCESS);
}
status = le16_to_cpu(mbxstat->status);
mb[0] = le16_to_cpu(mbxstat->mb0);
mb[1] = le16_to_cpu(mbxstat->mb1);
mb[2] = le16_to_cpu(mbxstat->mb2);
mb[6] = le16_to_cpu(mbxstat->mb6);
mb[7] = le16_to_cpu(mbxstat->mb7);
/* Good status? */
if ((status == CS_COMPLETE || status == CS_COMPLETE_CHKCOND) &&
mb[0] == MBS_COMMAND_COMPLETE) {
DEBUG14(printk("scsi(%ld): Login IOCB -- status=%x mb1=%x pn="
"%02x%02x%02x%02x%02x%02x%02x%02x.\n", ha->host_no, status,
mb[1], mbxstat->port_name[0], mbxstat->port_name[1],
mbxstat->port_name[2], mbxstat->port_name[3],
mbxstat->port_name[4], mbxstat->port_name[5],
mbxstat->port_name[6], mbxstat->port_name[7]));
memcpy(remote_fcport->node_name, mbxstat->node_name, WWN_SIZE);
memcpy(remote_fcport->port_name, mbxstat->port_name, WWN_SIZE);
/* Is the device already in our fcports list? */
if (remote_fcport->port_type != FCT_RSCN) {
DEBUG14(printk("scsi(%ld): Login IOCB -- marking "
"[%x/%02x%02x%02x] online.\n", ha->host_no,
remote_fcport->loop_id,
remote_fcport->d_id.b.domain,
remote_fcport->d_id.b.area,
remote_fcport->d_id.b.al_pa));
qla2x00_update_login_fcport(ha, mbxstat, remote_fcport);
return (QLA_SUCCESS);
}
/* Does the RSCN portname already exist in our fcports list? */
exist_fcport = NULL;
list_for_each_entry(fcport, &ha->fcports, list) {
if (memcmp(remote_fcport->port_name, fcport->port_name,
WWN_SIZE) == 0) {
exist_fcport = fcport;
break;
}
}
if (exist_fcport != NULL) {
DEBUG14(printk("scsi(%ld): Login IOCB -- found RSCN "
"fcport in fcports list [%p].\n", ha->host_no,
exist_fcport));
/* Abort any ADISC that could have been sent. */
if (exist_fcport->iodesc_idx_sent != iodesc->idx &&
exist_fcport->iodesc_idx_sent <
MAX_IO_DESCRIPTORS &&
ha->io_descriptors[exist_fcport->iodesc_idx_sent].
cb_idx == ADISC_PORT_IOCB_CB) {
abort_iodesc = qla2x00_alloc_iodesc(ha);
if (abort_iodesc) {
DEBUG14(printk("scsi(%ld): Login IOCB "
"-- issuing abort to outstanding "
"Adisc [%x/%02x%02x%02x].\n",
ha->host_no, remote_fcport->loop_id,
exist_fcport->d_id.b.domain,
exist_fcport->d_id.b.area,
exist_fcport->d_id.b.al_pa));
abort_iodesc->cb_idx = ABORT_IOCB_CB;
abort_iodesc->d_id.b24 =
exist_fcport->d_id.b24;
abort_iodesc->remote_fcport =
exist_fcport;
exist_fcport->iodesc_idx_sent =
abort_iodesc->idx;
qla2x00_send_abort_iocb(ha,
abort_iodesc, ha->io_descriptors[
exist_fcport->iodesc_idx_sent].
signature, 1);
} else {
DEBUG14(printk("scsi(%ld): Login IOCB "
"-- unable to abort outstanding "
"Adisc [%x/%02x%02x%02x].\n",
ha->host_no, remote_fcport->loop_id,
exist_fcport->d_id.b.domain,
exist_fcport->d_id.b.area,
exist_fcport->d_id.b.al_pa));
}
}
/*
* If the existing fcport is waiting to send an ADISC
* or LOGIN, then reuse remote fcport (RSCN) to
* continue waiting.
*/
reuse = 0;
remote_loopid = remote_fcport->loop_id;
remote_did.b24 = remote_fcport->d_id.b24;
if (exist_fcport->iodesc_idx_sent ==
IODESC_ADISC_NEEDED ||
exist_fcport->iodesc_idx_sent ==
IODESC_LOGIN_NEEDED) {
DEBUG14(printk("scsi(%ld): Login IOCB -- "
"existing fcport [%x/%02x%02x%02x] "
"waiting for IO descriptor, reuse RSCN "
"fcport.\n", ha->host_no,
exist_fcport->loop_id,
exist_fcport->d_id.b.domain,
exist_fcport->d_id.b.area,
exist_fcport->d_id.b.al_pa));
reuse++;
remote_fcport->iodesc_idx_sent =
exist_fcport->iodesc_idx_sent;
exist_fcport->iodesc_idx_sent =
IODESC_INVALID_INDEX;
remote_fcport->loop_id = exist_fcport->loop_id;
remote_fcport->d_id.b24 =
exist_fcport->d_id.b24;
}
/* Logout the old loopid. */
if (!reuse &&
exist_fcport->loop_id != remote_fcport->loop_id &&
exist_fcport->loop_id != FC_NO_LOOP_ID) {
login_iodesc = qla2x00_alloc_iodesc(ha);
if (login_iodesc) {
DEBUG14(printk("scsi(%ld): Login IOCB "
"-- issuing logout to free old "
"loop id [%x/%02x%02x%02x].\n",
ha->host_no, exist_fcport->loop_id,
exist_fcport->d_id.b.domain,
exist_fcport->d_id.b.area,
exist_fcport->d_id.b.al_pa));
login_iodesc->cb_idx =
LOGOUT_PORT_IOCB_CB;
login_iodesc->d_id.b24 =
exist_fcport->d_id.b24;
login_iodesc->remote_fcport =
exist_fcport;
exist_fcport->iodesc_idx_sent =
login_iodesc->idx;
qla2x00_send_logout_iocb(ha,
login_iodesc, 1);
} else {
/* Ran out of IO descriptiors. */
DEBUG14(printk("scsi(%ld): Login IOCB "
"-- unable to logout to free old "
"loop id [%x/%02x%02x%02x].\n",
ha->host_no, exist_fcport->loop_id,
exist_fcport->d_id.b.domain,
exist_fcport->d_id.b.area,
exist_fcport->d_id.b.al_pa));
exist_fcport->iodesc_idx_sent =
IODESC_INVALID_INDEX;
}
}
/* Update existing fcport with remote fcport info. */
DEBUG14(printk("scsi(%ld): Login IOCB -- marking "
"existing fcport [%x/%02x%02x%02x] online.\n",
ha->host_no, remote_loopid, remote_did.b.domain,
remote_did.b.area, remote_did.b.al_pa));
memcpy(exist_fcport->node_name,
remote_fcport->node_name, WWN_SIZE);
exist_fcport->loop_id = remote_loopid;
exist_fcport->d_id.b24 = remote_did.b24;
qla2x00_update_login_fcport(ha, mbxstat, exist_fcport);
/* Finally, free the remote (RSCN) fcport. */
if (!reuse) {
DEBUG14(printk("scsi(%ld): Login IOCB -- "
"Freeing RSCN fcport %p "
"[%x/%02x%02x%02x].\n", ha->host_no,
remote_fcport, remote_fcport->loop_id,
remote_fcport->d_id.b.domain,
remote_fcport->d_id.b.area,
remote_fcport->d_id.b.al_pa));
list_del(&remote_fcport->list);
kfree(remote_fcport);
}
return (QLA_SUCCESS);
}
/*
* A new device has been added, move the RSCN fcport to our
* fcports list.
*/
DEBUG14(printk("scsi(%ld): Login IOCB -- adding RSCN fcport "
"[%x/%02x%02x%02x] to fcports list.\n", ha->host_no,
remote_fcport->loop_id, remote_fcport->d_id.b.domain,
remote_fcport->d_id.b.area, remote_fcport->d_id.b.al_pa));
list_del(&remote_fcport->list);
remote_fcport->flags = (FCF_RLC_SUPPORT | FCF_RESCAN_NEEDED);
qla2x00_update_login_fcport(ha, mbxstat, remote_fcport);
list_add_tail(&remote_fcport->list, &ha->fcports);
set_bit(FCPORT_RESCAN_NEEDED, &ha->dpc_flags);
} else {
/* Handle login failure. */
if (remote_fcport->login_retry != 0) {
if (mb[0] == MBS_LOOP_ID_USED) {
inuse_did.b.domain = LSB(mb[1]);
inuse_did.b.area = MSB(mb[2]);
inuse_did.b.al_pa = LSB(mb[2]);
DEBUG14(printk("scsi(%ld): Login IOCB -- loop "
"id [%x] used by port id [%02x%02x%02x].\n",
ha->host_no, remote_fcport->loop_id,
inuse_did.b.domain, inuse_did.b.area,
inuse_did.b.al_pa));
if (remote_fcport->d_id.b24 ==
INVALID_PORT_ID) {
/*
* Invalid port id means we are trying
* to login to a remote port with just
* a loop id without knowing about the
* port id. Copy the port id and try
* again.
*/
remote_fcport->d_id.b24 = inuse_did.b24;
iodesc->d_id.b24 = inuse_did.b24;
} else {
remote_fcport->loop_id++;
rval = qla2x00_find_new_loop_id(ha,
remote_fcport);
if (rval == QLA_FUNCTION_FAILED) {
/* No more loop ids. */
return (QLA_SUCCESS);
}
}
} else if (mb[0] == MBS_PORT_ID_USED) {
/*
* Device has another loop ID. The firmware
* group recommends the driver perform an
* implicit login with the specified ID.
*/
DEBUG14(printk("scsi(%ld): Login IOCB -- port "
"id [%02x%02x%02x] already assigned to "
"loop id [%x].\n", ha->host_no,
iodesc->d_id.b.domain, iodesc->d_id.b.area,
iodesc->d_id.b.al_pa, mb[1]));
remote_fcport->loop_id = mb[1];
} else {
/* Unable to perform login, try again. */
DEBUG14(printk("scsi(%ld): Login IOCB -- "
"failed login [%x/%02x%02x%02x], status=%x "
"mb0=%x mb1=%x mb2=%x mb6=%x mb7=%x.\n",
ha->host_no, remote_fcport->loop_id,
iodesc->d_id.b.domain, iodesc->d_id.b.area,
iodesc->d_id.b.al_pa, status, mb[0], mb[1],
mb[2], mb[6], mb[7]));
}
/* Reissue Login with the same IO descriptor. */
iodesc->signature =
qla2x00_iodesc_to_handle(iodesc);
iodesc->cb_idx = LOGIN_PORT_IOCB_CB;
iodesc->d_id.b24 = remote_fcport->d_id.b24;
remote_fcport->iodesc_idx_sent = iodesc->idx;
remote_fcport->login_retry--;
DEBUG14(printk("scsi(%ld): Login IOCB -- retrying "
"login to [%x/%02x%02x%02x] (%d).\n", ha->host_no,
remote_fcport->loop_id,
remote_fcport->d_id.b.domain,
remote_fcport->d_id.b.area,
remote_fcport->d_id.b.al_pa,
remote_fcport->login_retry));
qla2x00_send_login_iocb(ha, iodesc,
&remote_fcport->d_id, 1);
return (QLA_FUNCTION_FAILED);
} else {
/* No more logins, mark device dead. */
DEBUG14(printk("scsi(%ld): Login IOCB -- failed "
"login [%x/%02x%02x%02x] after retries, status=%x "
"mb0=%x mb1=%x mb2=%x mb6=%x mb7=%x.\n",
ha->host_no, remote_fcport->loop_id,
iodesc->d_id.b.domain, iodesc->d_id.b.area,
iodesc->d_id.b.al_pa, status, mb[0], mb[1],
mb[2], mb[6], mb[7]));
atomic_set(&remote_fcport->state, FCS_DEVICE_DEAD);
if (remote_fcport->port_type == FCT_RSCN) {
DEBUG14(printk("scsi(%ld): Login IOCB -- "
"Freeing dead RSCN fcport %p "
"[%x/%02x%02x%02x].\n", ha->host_no,
remote_fcport, remote_fcport->loop_id,
remote_fcport->d_id.b.domain,
remote_fcport->d_id.b.area,
remote_fcport->d_id.b.al_pa));
list_del(&remote_fcport->list);
kfree(remote_fcport);
}
}
}
return (QLA_SUCCESS);
}
/**
* IO descriptor processing routines.
**/
/**
* qla2x00_alloc_rscn_fcport() - Allocate an RSCN type fcport.
* @ha: HA context
* @flags: allocation flags
*
* Returns a pointer to the allocated RSCN fcport, or NULL, if none available.
*/
fc_port_t *
qla2x00_alloc_rscn_fcport(scsi_qla_host_t *ha, gfp_t flags)
{
fc_port_t *fcport;
fcport = qla2x00_alloc_fcport(ha, flags);
if (fcport == NULL)
return (fcport);
/* Setup RSCN fcport structure. */
fcport->port_type = FCT_RSCN;
return (fcport);
}
/**
* qla2x00_handle_port_rscn() - Handle port RSCN.
* @ha: HA context
* @rscn_entry: RSCN entry
* @fcport: fcport entry to updated
*
* Returns QLA_SUCCESS if the port RSCN was handled.
*/
int
qla2x00_handle_port_rscn(scsi_qla_host_t *ha, uint32_t rscn_entry,
fc_port_t *known_fcport, int ha_locked)
{
int rval;
port_id_t rscn_pid;
fc_port_t *fcport, *remote_fcport, *rscn_fcport;
struct io_descriptor *iodesc;
remote_fcport = NULL;
rscn_fcport = NULL;
/* Prepare port id based on incoming entries. */
if (known_fcport) {
rscn_pid.b24 = known_fcport->d_id.b24;
remote_fcport = known_fcport;
DEBUG14(printk("scsi(%ld): Handle RSCN -- process RSCN for "
"fcport [%02x%02x%02x].\n", ha->host_no,
remote_fcport->d_id.b.domain, remote_fcport->d_id.b.area,
remote_fcport->d_id.b.al_pa));
} else {
rscn_pid.b.domain = LSB(MSW(rscn_entry));
rscn_pid.b.area = MSB(LSW(rscn_entry));
rscn_pid.b.al_pa = LSB(LSW(rscn_entry));
DEBUG14(printk("scsi(%ld): Handle RSCN -- process RSCN for "
"port id [%02x%02x%02x].\n", ha->host_no,
rscn_pid.b.domain, rscn_pid.b.area, rscn_pid.b.al_pa));
/*
* Search fcport lists for a known entry at the specified port
* ID.
*/
list_for_each_entry(fcport, &ha->fcports, list) {
if (rscn_pid.b24 == fcport->d_id.b24) {
remote_fcport = fcport;
break;
}
}
list_for_each_entry(fcport, &ha->rscn_fcports, list) {
if (rscn_pid.b24 == fcport->d_id.b24) {
rscn_fcport = fcport;
break;
}
}
if (remote_fcport == NULL)
remote_fcport = rscn_fcport;
}
/*
* If the port is already in our fcport list and online, send an ADISC
* to see if it's still alive. Issue login if a new fcport or the known
* fcport is currently offline.
*/
if (remote_fcport) {
/*
* No need to send request if the remote fcport is currently
* waiting for an available io descriptor.
*/
if (known_fcport == NULL &&
(remote_fcport->iodesc_idx_sent == IODESC_ADISC_NEEDED ||
remote_fcport->iodesc_idx_sent == IODESC_LOGIN_NEEDED)) {
/*
* If previous waiting io descriptor is an ADISC, then
* the new RSCN may come from a new remote fcport being
* plugged into the same location.
*/
if (remote_fcport->port_type == FCT_RSCN) {
remote_fcport->iodesc_idx_sent =
IODESC_LOGIN_NEEDED;
} else if (remote_fcport->iodesc_idx_sent ==
IODESC_ADISC_NEEDED) {
fc_port_t *new_fcport;
remote_fcport->iodesc_idx_sent =
IODESC_INVALID_INDEX;
/* Create new fcport for later login. */
new_fcport = qla2x00_alloc_rscn_fcport(ha,
ha_locked ? GFP_ATOMIC: GFP_KERNEL);
if (new_fcport) {
DEBUG14(printk("scsi(%ld): Handle RSCN "
"-- creating RSCN fcport %p for "
"future login.\n", ha->host_no,
new_fcport));
new_fcport->d_id.b24 =
remote_fcport->d_id.b24;
new_fcport->iodesc_idx_sent =
IODESC_LOGIN_NEEDED;
list_add_tail(&new_fcport->list,
&ha->rscn_fcports);
set_bit(IODESC_PROCESS_NEEDED,
&ha->dpc_flags);
} else {
DEBUG14(printk("scsi(%ld): Handle RSCN "
"-- unable to allocate RSCN fcport "
"for future login.\n",
ha->host_no));
}
}
return (QLA_SUCCESS);
}
/* Send ADISC if the fcport is online */
if (atomic_read(&remote_fcport->state) == FCS_ONLINE ||
remote_fcport->iodesc_idx_sent == IODESC_ADISC_NEEDED) {
atomic_set(&remote_fcport->state, FCS_DEVICE_LOST);
iodesc = qla2x00_alloc_iodesc(ha);
if (iodesc == NULL) {
/* Mark fcport for later adisc processing */
DEBUG14(printk("scsi(%ld): Handle RSCN -- not "
"enough IO descriptors for Adisc, flag "
"for later processing.\n", ha->host_no));
remote_fcport->iodesc_idx_sent =
IODESC_ADISC_NEEDED;
set_bit(IODESC_PROCESS_NEEDED, &ha->dpc_flags);
return (QLA_SUCCESS);
}
iodesc->cb_idx = ADISC_PORT_IOCB_CB;
iodesc->d_id.b24 = rscn_pid.b24;
iodesc->remote_fcport = remote_fcport;
remote_fcport->iodesc_idx_sent = iodesc->idx;
qla2x00_send_adisc_iocb(ha, iodesc, ha_locked);
return (QLA_SUCCESS);
} else if (remote_fcport->iodesc_idx_sent <
MAX_IO_DESCRIPTORS &&
ha->io_descriptors[remote_fcport->iodesc_idx_sent].cb_idx ==
ADISC_PORT_IOCB_CB) {
/*
* Receiving another RSCN while an ADISC is pending,
* abort the IOCB. Use the same descriptor for the
* abort.
*/
uint32_t handle_to_abort;
iodesc = &ha->io_descriptors[
remote_fcport->iodesc_idx_sent];
qla2x00_remove_iodesc_timer(iodesc);
handle_to_abort = iodesc->signature;
iodesc->signature = qla2x00_iodesc_to_handle(iodesc);
iodesc->cb_idx = ABORT_IOCB_CB;
iodesc->d_id.b24 = remote_fcport->d_id.b24;
iodesc->remote_fcport = remote_fcport;
remote_fcport->iodesc_idx_sent = iodesc->idx;
DEBUG14(printk("scsi(%ld): Handle RSCN -- issuing "
"abort to outstanding Adisc [%x/%02x%02x%02x].\n",
ha->host_no, remote_fcport->loop_id,
iodesc->d_id.b.domain, iodesc->d_id.b.area,
iodesc->d_id.b.al_pa));
qla2x00_send_abort_iocb(ha, iodesc, handle_to_abort,
ha_locked);
}
}
/* We need to login to the remote port, find it. */
if (known_fcport) {
remote_fcport = known_fcport;
} else if (rscn_fcport && rscn_fcport->d_id.b24 != INVALID_PORT_ID &&
rscn_fcport->iodesc_idx_sent < MAX_IO_DESCRIPTORS &&
ha->io_descriptors[rscn_fcport->iodesc_idx_sent].cb_idx ==
LOGIN_PORT_IOCB_CB) {
/*
* Ignore duplicate RSCN on fcport which has already
* initiated a login IOCB.
*/
DEBUG14(printk("scsi(%ld): Handle RSCN -- ignoring, login "
"already sent to [%02x%02x%02x].\n", ha->host_no,
rscn_fcport->d_id.b.domain, rscn_fcport->d_id.b.area,
rscn_fcport->d_id.b.al_pa));
return (QLA_SUCCESS);
} else if (rscn_fcport && rscn_fcport->d_id.b24 != INVALID_PORT_ID &&
rscn_fcport != remote_fcport) {
/* Reuse same rscn fcport. */
DEBUG14(printk("scsi(%ld): Handle RSCN -- reusing RSCN fcport "
"[%02x%02x%02x].\n", ha->host_no,
rscn_fcport->d_id.b.domain, rscn_fcport->d_id.b.area,
rscn_fcport->d_id.b.al_pa));
remote_fcport = rscn_fcport;
} else {
/* Create new fcport for later login. */
remote_fcport = qla2x00_alloc_rscn_fcport(ha,
ha_locked ? GFP_ATOMIC: GFP_KERNEL);
list_add_tail(&remote_fcport->list, &ha->rscn_fcports);
}
if (remote_fcport == NULL)
return (QLA_SUCCESS);
/* Prepare fcport for login. */
atomic_set(&remote_fcport->state, FCS_DEVICE_LOST);
remote_fcport->login_retry = 3; /* ha->login_retry_count; */
remote_fcport->d_id.b24 = rscn_pid.b24;
iodesc = qla2x00_alloc_iodesc(ha);
if (iodesc == NULL) {
/* Mark fcport for later adisc processing. */
DEBUG14(printk("scsi(%ld): Handle RSCN -- not enough IO "
"descriptors for Login, flag for later processing.\n",
ha->host_no));
remote_fcport->iodesc_idx_sent = IODESC_LOGIN_NEEDED;
set_bit(IODESC_PROCESS_NEEDED, &ha->dpc_flags);
return (QLA_SUCCESS);
}
if (known_fcport == NULL || rscn_pid.b24 != INVALID_PORT_ID) {
remote_fcport->loop_id = ha->min_external_loopid;
rval = qla2x00_find_new_loop_id(ha, remote_fcport);
if (rval == QLA_FUNCTION_FAILED) {
/* No more loop ids, failed. */
DEBUG14(printk("scsi(%ld): Handle RSCN -- no available "
"loop id to perform Login, failed.\n",
ha->host_no));
return (rval);
}
}
iodesc->cb_idx = LOGIN_PORT_IOCB_CB;
iodesc->d_id.b24 = rscn_pid.b24;
iodesc->remote_fcport = remote_fcport;
remote_fcport->iodesc_idx_sent = iodesc->idx;
DEBUG14(printk("scsi(%ld): Handle RSCN -- attempting login to "
"[%x/%02x%02x%02x].\n", ha->host_no, remote_fcport->loop_id,
iodesc->d_id.b.domain, iodesc->d_id.b.area, iodesc->d_id.b.al_pa));
qla2x00_send_login_iocb(ha, iodesc, &rscn_pid, ha_locked);
return (QLA_SUCCESS);
}
/**
* qla2x00_process_iodesc() - Complete IO descriptor processing.
* @ha: HA context
* @mbxstat: Mailbox IOCB status
*/
void
qla2x00_process_iodesc(scsi_qla_host_t *ha, struct mbx_entry *mbxstat)
{
int rval;
uint32_t signature;
fc_port_t *fcport;
struct io_descriptor *iodesc;
signature = mbxstat->handle;
DEBUG14(printk("scsi(%ld): Process IODesc -- processing %08x.\n",
ha->host_no, signature));
/* Retrieve proper IO descriptor. */
iodesc = qla2x00_handle_to_iodesc(ha, signature);
if (iodesc == NULL) {
DEBUG14(printk("scsi(%ld): Process IODesc -- ignoring, "
"incorrect signature %08x.\n", ha->host_no, signature));
return;
}
/* Stop IO descriptor timer. */
qla2x00_remove_iodesc_timer(iodesc);
/* Verify signature match. */
if (iodesc->signature != signature) {
DEBUG14(printk("scsi(%ld): Process IODesc -- ignoring, "
"signature mismatch, sent %08x, received %08x.\n",
ha->host_no, iodesc->signature, signature));
return;
}
/* Go with IOCB callback. */
rval = iocb_function_cb_list[iodesc->cb_idx](ha, iodesc, mbxstat);
if (rval != QLA_SUCCESS) {
/* IO descriptor reused by callback. */
return;
}
qla2x00_free_iodesc(iodesc);
if (test_bit(IODESC_PROCESS_NEEDED, &ha->dpc_flags)) {
/* Scan our fcports list for any RSCN requests. */
list_for_each_entry(fcport, &ha->fcports, list) {
if (fcport->iodesc_idx_sent == IODESC_ADISC_NEEDED ||
fcport->iodesc_idx_sent == IODESC_LOGIN_NEEDED) {
qla2x00_handle_port_rscn(ha, 0, fcport, 1);
return;
}
}
/* Scan our RSCN fcports list for any RSCN requests. */
list_for_each_entry(fcport, &ha->rscn_fcports, list) {
if (fcport->iodesc_idx_sent == IODESC_ADISC_NEEDED ||
fcport->iodesc_idx_sent == IODESC_LOGIN_NEEDED) {
qla2x00_handle_port_rscn(ha, 0, fcport, 1);
return;
}
}
}
clear_bit(IODESC_PROCESS_NEEDED, &ha->dpc_flags);
}
/**
* qla2x00_cancel_io_descriptors() - Cancel all outstanding io descriptors.
* @ha: HA context
*
* This routine will also delete any RSCN entries related to the outstanding
* IO descriptors.
*/
void
qla2x00_cancel_io_descriptors(scsi_qla_host_t *ha)
{
fc_port_t *fcport, *fcptemp;
clear_bit(IODESC_PROCESS_NEEDED, &ha->dpc_flags);
/* Abort all IO descriptors. */
qla2x00_init_io_descriptors(ha);
/* Reset all pending IO descriptors in fcports list. */
list_for_each_entry(fcport, &ha->fcports, list) {
fcport->iodesc_idx_sent = IODESC_INVALID_INDEX;
}
/* Reset all pending IO descriptors in rscn fcports list. */
list_for_each_entry_safe(fcport, fcptemp, &ha->rscn_fcports, list) {
DEBUG14(printk("scsi(%ld): Cancel IOs -- Freeing RSCN fcport "
"%p [%x/%02x%02x%02x].\n", ha->host_no, fcport,
fcport->loop_id, fcport->d_id.b.domain, fcport->d_id.b.area,
fcport->d_id.b.al_pa));
list_del(&fcport->list);
kfree(fcport);
}
}
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