linux/drivers/scsi/qla2xxx/qla_isr.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"
#include <linux/delay.h>
#include <scsi/scsi_tcq.h>
static void qla2x00_mbx_completion(scsi_qla_host_t *, uint16_t);
static void qla2x00_process_completed_request(struct scsi_qla_host *, uint32_t);
static void qla2x00_status_entry(scsi_qla_host_t *, void *);
static void qla2x00_status_cont_entry(scsi_qla_host_t *, sts_cont_entry_t *);
static void qla2x00_error_entry(scsi_qla_host_t *, sts_entry_t *);
static void qla2x00_ms_entry(scsi_qla_host_t *, ms_iocb_entry_t *);
static void qla24xx_ms_entry(scsi_qla_host_t *, struct ct_entry_24xx *);
/**
* qla2100_intr_handler() - Process interrupts for the ISP2100 and ISP2200.
* @irq:
* @dev_id: SCSI driver HA context
*
* Called by system whenever the host adapter generates an interrupt.
*
* Returns handled flag.
*/
irqreturn_t
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers Maintain a per-CPU global "struct pt_regs *" variable which can be used instead of passing regs around manually through all ~1800 interrupt handlers in the Linux kernel. The regs pointer is used in few places, but it potentially costs both stack space and code to pass it around. On the FRV arch, removing the regs parameter from all the genirq function results in a 20% speed up of the IRQ exit path (ie: from leaving timer_interrupt() to leaving do_IRQ()). Where appropriate, an arch may override the generic storage facility and do something different with the variable. On FRV, for instance, the address is maintained in GR28 at all times inside the kernel as part of general exception handling. Having looked over the code, it appears that the parameter may be handed down through up to twenty or so layers of functions. Consider a USB character device attached to a USB hub, attached to a USB controller that posts its interrupts through a cascaded auxiliary interrupt controller. A character device driver may want to pass regs to the sysrq handler through the input layer which adds another few layers of parameter passing. I've build this code with allyesconfig for x86_64 and i386. I've runtested the main part of the code on FRV and i386, though I can't test most of the drivers. I've also done partial conversion for powerpc and MIPS - these at least compile with minimal configurations. This will affect all archs. Mostly the changes should be relatively easy. Take do_IRQ(), store the regs pointer at the beginning, saving the old one: struct pt_regs *old_regs = set_irq_regs(regs); And put the old one back at the end: set_irq_regs(old_regs); Don't pass regs through to generic_handle_irq() or __do_IRQ(). In timer_interrupt(), this sort of change will be necessary: - update_process_times(user_mode(regs)); - profile_tick(CPU_PROFILING, regs); + update_process_times(user_mode(get_irq_regs())); + profile_tick(CPU_PROFILING); I'd like to move update_process_times()'s use of get_irq_regs() into itself, except that i386, alone of the archs, uses something other than user_mode(). Some notes on the interrupt handling in the drivers: (*) input_dev() is now gone entirely. The regs pointer is no longer stored in the input_dev struct. (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does something different depending on whether it's been supplied with a regs pointer or not. (*) Various IRQ handler function pointers have been moved to type irq_handler_t. Signed-Off-By: David Howells <dhowells@redhat.com> (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 13:55:46 +00:00
qla2100_intr_handler(int irq, void *dev_id)
{
scsi_qla_host_t *ha;
struct device_reg_2xxx __iomem *reg;
int status;
unsigned long flags;
unsigned long iter;
uint16_t hccr;
uint16_t mb[4];
ha = (scsi_qla_host_t *) dev_id;
if (!ha) {
printk(KERN_INFO
"%s(): NULL host pointer\n", __func__);
return (IRQ_NONE);
}
reg = &ha->iobase->isp;
status = 0;
spin_lock_irqsave(&ha->hardware_lock, flags);
for (iter = 50; iter--; ) {
hccr = RD_REG_WORD(&reg->hccr);
if (hccr & HCCR_RISC_PAUSE) {
if (pci_channel_offline(ha->pdev))
break;
/*
* Issue a "HARD" reset in order for the RISC interrupt
* bit to be cleared. Schedule a big hammmer to get
* out of the RISC PAUSED state.
*/
WRT_REG_WORD(&reg->hccr, HCCR_RESET_RISC);
RD_REG_WORD(&reg->hccr);
ha->isp_ops->fw_dump(ha, 1);
set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
break;
} else if ((RD_REG_WORD(&reg->istatus) & ISR_RISC_INT) == 0)
break;
if (RD_REG_WORD(&reg->semaphore) & BIT_0) {
WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
RD_REG_WORD(&reg->hccr);
/* Get mailbox data. */
mb[0] = RD_MAILBOX_REG(ha, reg, 0);
if (mb[0] > 0x3fff && mb[0] < 0x8000) {
qla2x00_mbx_completion(ha, mb[0]);
status |= MBX_INTERRUPT;
} else if (mb[0] > 0x7fff && mb[0] < 0xc000) {
mb[1] = RD_MAILBOX_REG(ha, reg, 1);
mb[2] = RD_MAILBOX_REG(ha, reg, 2);
mb[3] = RD_MAILBOX_REG(ha, reg, 3);
qla2x00_async_event(ha, mb);
} else {
/*EMPTY*/
DEBUG2(printk("scsi(%ld): Unrecognized "
"interrupt type (%d).\n",
ha->host_no, mb[0]));
}
/* Release mailbox registers. */
WRT_REG_WORD(&reg->semaphore, 0);
RD_REG_WORD(&reg->semaphore);
} else {
qla2x00_process_response_queue(ha);
WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
RD_REG_WORD(&reg->hccr);
}
}
spin_unlock_irqrestore(&ha->hardware_lock, flags);
if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
(status & MBX_INTERRUPT) && ha->flags.mbox_int) {
set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
up(&ha->mbx_intr_sem);
}
return (IRQ_HANDLED);
}
/**
* qla2300_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
* @irq:
* @dev_id: SCSI driver HA context
*
* Called by system whenever the host adapter generates an interrupt.
*
* Returns handled flag.
*/
irqreturn_t
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers Maintain a per-CPU global "struct pt_regs *" variable which can be used instead of passing regs around manually through all ~1800 interrupt handlers in the Linux kernel. The regs pointer is used in few places, but it potentially costs both stack space and code to pass it around. On the FRV arch, removing the regs parameter from all the genirq function results in a 20% speed up of the IRQ exit path (ie: from leaving timer_interrupt() to leaving do_IRQ()). Where appropriate, an arch may override the generic storage facility and do something different with the variable. On FRV, for instance, the address is maintained in GR28 at all times inside the kernel as part of general exception handling. Having looked over the code, it appears that the parameter may be handed down through up to twenty or so layers of functions. Consider a USB character device attached to a USB hub, attached to a USB controller that posts its interrupts through a cascaded auxiliary interrupt controller. A character device driver may want to pass regs to the sysrq handler through the input layer which adds another few layers of parameter passing. I've build this code with allyesconfig for x86_64 and i386. I've runtested the main part of the code on FRV and i386, though I can't test most of the drivers. I've also done partial conversion for powerpc and MIPS - these at least compile with minimal configurations. This will affect all archs. Mostly the changes should be relatively easy. Take do_IRQ(), store the regs pointer at the beginning, saving the old one: struct pt_regs *old_regs = set_irq_regs(regs); And put the old one back at the end: set_irq_regs(old_regs); Don't pass regs through to generic_handle_irq() or __do_IRQ(). In timer_interrupt(), this sort of change will be necessary: - update_process_times(user_mode(regs)); - profile_tick(CPU_PROFILING, regs); + update_process_times(user_mode(get_irq_regs())); + profile_tick(CPU_PROFILING); I'd like to move update_process_times()'s use of get_irq_regs() into itself, except that i386, alone of the archs, uses something other than user_mode(). Some notes on the interrupt handling in the drivers: (*) input_dev() is now gone entirely. The regs pointer is no longer stored in the input_dev struct. (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does something different depending on whether it's been supplied with a regs pointer or not. (*) Various IRQ handler function pointers have been moved to type irq_handler_t. Signed-Off-By: David Howells <dhowells@redhat.com> (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 13:55:46 +00:00
qla2300_intr_handler(int irq, void *dev_id)
{
scsi_qla_host_t *ha;
struct device_reg_2xxx __iomem *reg;
int status;
unsigned long flags;
unsigned long iter;
uint32_t stat;
uint16_t hccr;
uint16_t mb[4];
ha = (scsi_qla_host_t *) dev_id;
if (!ha) {
printk(KERN_INFO
"%s(): NULL host pointer\n", __func__);
return (IRQ_NONE);
}
reg = &ha->iobase->isp;
status = 0;
spin_lock_irqsave(&ha->hardware_lock, flags);
for (iter = 50; iter--; ) {
stat = RD_REG_DWORD(&reg->u.isp2300.host_status);
if (stat & HSR_RISC_PAUSED) {
if (pci_channel_offline(ha->pdev))
break;
hccr = RD_REG_WORD(&reg->hccr);
if (hccr & (BIT_15 | BIT_13 | BIT_11 | BIT_8))
qla_printk(KERN_INFO, ha, "Parity error -- "
"HCCR=%x, Dumping firmware!\n", hccr);
else
qla_printk(KERN_INFO, ha, "RISC paused -- "
"HCCR=%x, Dumping firmware!\n", hccr);
/*
* Issue a "HARD" reset in order for the RISC
* interrupt bit to be cleared. Schedule a big
* hammmer to get out of the RISC PAUSED state.
*/
WRT_REG_WORD(&reg->hccr, HCCR_RESET_RISC);
RD_REG_WORD(&reg->hccr);
ha->isp_ops->fw_dump(ha, 1);
set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
break;
} else if ((stat & HSR_RISC_INT) == 0)
break;
switch (stat & 0xff) {
case 0x1:
case 0x2:
case 0x10:
case 0x11:
qla2x00_mbx_completion(ha, MSW(stat));
status |= MBX_INTERRUPT;
/* Release mailbox registers. */
WRT_REG_WORD(&reg->semaphore, 0);
break;
case 0x12:
mb[0] = MSW(stat);
mb[1] = RD_MAILBOX_REG(ha, reg, 1);
mb[2] = RD_MAILBOX_REG(ha, reg, 2);
mb[3] = RD_MAILBOX_REG(ha, reg, 3);
qla2x00_async_event(ha, mb);
break;
case 0x13:
qla2x00_process_response_queue(ha);
break;
case 0x15:
mb[0] = MBA_CMPLT_1_16BIT;
mb[1] = MSW(stat);
qla2x00_async_event(ha, mb);
break;
case 0x16:
mb[0] = MBA_SCSI_COMPLETION;
mb[1] = MSW(stat);
mb[2] = RD_MAILBOX_REG(ha, reg, 2);
qla2x00_async_event(ha, mb);
break;
default:
DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
"(%d).\n",
ha->host_no, stat & 0xff));
break;
}
WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
RD_REG_WORD_RELAXED(&reg->hccr);
}
spin_unlock_irqrestore(&ha->hardware_lock, flags);
if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
(status & MBX_INTERRUPT) && ha->flags.mbox_int) {
set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
up(&ha->mbx_intr_sem);
}
return (IRQ_HANDLED);
}
/**
* qla2x00_mbx_completion() - Process mailbox command completions.
* @ha: SCSI driver HA context
* @mb0: Mailbox0 register
*/
static void
qla2x00_mbx_completion(scsi_qla_host_t *ha, uint16_t mb0)
{
uint16_t cnt;
uint16_t __iomem *wptr;
struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
/* Load return mailbox registers. */
ha->flags.mbox_int = 1;
ha->mailbox_out[0] = mb0;
wptr = (uint16_t __iomem *)MAILBOX_REG(ha, reg, 1);
for (cnt = 1; cnt < ha->mbx_count; cnt++) {
if (IS_QLA2200(ha) && cnt == 8)
wptr = (uint16_t __iomem *)MAILBOX_REG(ha, reg, 8);
if (cnt == 4 || cnt == 5)
ha->mailbox_out[cnt] = qla2x00_debounce_register(wptr);
else
ha->mailbox_out[cnt] = RD_REG_WORD(wptr);
wptr++;
}
if (ha->mcp) {
DEBUG3(printk("%s(%ld): Got mailbox completion. cmd=%x.\n",
__func__, ha->host_no, ha->mcp->mb[0]));
} else {
DEBUG2_3(printk("%s(%ld): MBX pointer ERROR!\n",
__func__, ha->host_no));
}
}
/**
* qla2x00_async_event() - Process aynchronous events.
* @ha: SCSI driver HA context
* @mb: Mailbox registers (0 - 3)
*/
void
qla2x00_async_event(scsi_qla_host_t *ha, uint16_t *mb)
{
#define LS_UNKNOWN 2
static char *link_speeds[5] = { "1", "2", "?", "4", "8" };
char *link_speed;
uint16_t handle_cnt;
uint16_t cnt;
uint32_t handles[5];
struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
uint32_t rscn_entry, host_pid;
uint8_t rscn_queue_index;
/* Setup to process RIO completion. */
handle_cnt = 0;
switch (mb[0]) {
case MBA_SCSI_COMPLETION:
handles[0] = le32_to_cpu((uint32_t)((mb[2] << 16) | mb[1]));
handle_cnt = 1;
break;
case MBA_CMPLT_1_16BIT:
handles[0] = mb[1];
handle_cnt = 1;
mb[0] = MBA_SCSI_COMPLETION;
break;
case MBA_CMPLT_2_16BIT:
handles[0] = mb[1];
handles[1] = mb[2];
handle_cnt = 2;
mb[0] = MBA_SCSI_COMPLETION;
break;
case MBA_CMPLT_3_16BIT:
handles[0] = mb[1];
handles[1] = mb[2];
handles[2] = mb[3];
handle_cnt = 3;
mb[0] = MBA_SCSI_COMPLETION;
break;
case MBA_CMPLT_4_16BIT:
handles[0] = mb[1];
handles[1] = mb[2];
handles[2] = mb[3];
handles[3] = (uint32_t)RD_MAILBOX_REG(ha, reg, 6);
handle_cnt = 4;
mb[0] = MBA_SCSI_COMPLETION;
break;
case MBA_CMPLT_5_16BIT:
handles[0] = mb[1];
handles[1] = mb[2];
handles[2] = mb[3];
handles[3] = (uint32_t)RD_MAILBOX_REG(ha, reg, 6);
handles[4] = (uint32_t)RD_MAILBOX_REG(ha, reg, 7);
handle_cnt = 5;
mb[0] = MBA_SCSI_COMPLETION;
break;
case MBA_CMPLT_2_32BIT:
handles[0] = le32_to_cpu((uint32_t)((mb[2] << 16) | mb[1]));
handles[1] = le32_to_cpu(
((uint32_t)(RD_MAILBOX_REG(ha, reg, 7) << 16)) |
RD_MAILBOX_REG(ha, reg, 6));
handle_cnt = 2;
mb[0] = MBA_SCSI_COMPLETION;
break;
default:
break;
}
switch (mb[0]) {
case MBA_SCSI_COMPLETION: /* Fast Post */
if (!ha->flags.online)
break;
for (cnt = 0; cnt < handle_cnt; cnt++)
qla2x00_process_completed_request(ha, handles[cnt]);
break;
case MBA_RESET: /* Reset */
DEBUG2(printk("scsi(%ld): Asynchronous RESET.\n", ha->host_no));
set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
break;
case MBA_SYSTEM_ERR: /* System Error */
qla_printk(KERN_INFO, ha,
"ISP System Error - mbx1=%xh mbx2=%xh mbx3=%xh.\n",
mb[1], mb[2], mb[3]);
ha->isp_ops->fw_dump(ha, 1);
if (IS_FWI2_CAPABLE(ha)) {
if (mb[1] == 0 && mb[2] == 0) {
qla_printk(KERN_ERR, ha,
"Unrecoverable Hardware Error: adapter "
"marked OFFLINE!\n");
ha->flags.online = 0;
} else
set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
} else if (mb[1] == 0) {
qla_printk(KERN_INFO, ha,
"Unrecoverable Hardware Error: adapter marked "
"OFFLINE!\n");
ha->flags.online = 0;
} else
set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
break;
case MBA_REQ_TRANSFER_ERR: /* Request Transfer Error */
DEBUG2(printk("scsi(%ld): ISP Request Transfer Error.\n",
ha->host_no));
qla_printk(KERN_WARNING, ha, "ISP Request Transfer Error.\n");
set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
break;
case MBA_RSP_TRANSFER_ERR: /* Response Transfer Error */
DEBUG2(printk("scsi(%ld): ISP Response Transfer Error.\n",
ha->host_no));
qla_printk(KERN_WARNING, ha, "ISP Response Transfer Error.\n");
set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
break;
case MBA_WAKEUP_THRES: /* Request Queue Wake-up */
DEBUG2(printk("scsi(%ld): Asynchronous WAKEUP_THRES.\n",
ha->host_no));
break;
case MBA_LIP_OCCURRED: /* Loop Initialization Procedure */
DEBUG2(printk("scsi(%ld): LIP occured (%x).\n", ha->host_no,
mb[1]));
qla_printk(KERN_INFO, ha, "LIP occured (%x).\n", mb[1]);
if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
atomic_set(&ha->loop_state, LOOP_DOWN);
atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
qla2x00_mark_all_devices_lost(ha, 1);
}
if (ha->parent) {
atomic_set(&ha->vp_state, VP_FAILED);
fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
}
set_bit(REGISTER_FC4_NEEDED, &ha->dpc_flags);
ha->flags.management_server_logged_in = 0;
break;
case MBA_LOOP_UP: /* Loop Up Event */
if (IS_QLA2100(ha) || IS_QLA2200(ha)) {
link_speed = link_speeds[0];
ha->link_data_rate = PORT_SPEED_1GB;
} else {
link_speed = link_speeds[LS_UNKNOWN];
if (mb[1] < 5)
link_speed = link_speeds[mb[1]];
ha->link_data_rate = mb[1];
}
DEBUG2(printk("scsi(%ld): Asynchronous LOOP UP (%s Gbps).\n",
ha->host_no, link_speed));
qla_printk(KERN_INFO, ha, "LOOP UP detected (%s Gbps).\n",
link_speed);
ha->flags.management_server_logged_in = 0;
break;
case MBA_LOOP_DOWN: /* Loop Down Event */
DEBUG2(printk("scsi(%ld): Asynchronous LOOP DOWN (%x).\n",
ha->host_no, mb[1]));
qla_printk(KERN_INFO, ha, "LOOP DOWN detected (%x).\n", mb[1]);
if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
atomic_set(&ha->loop_state, LOOP_DOWN);
atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
ha->device_flags |= DFLG_NO_CABLE;
qla2x00_mark_all_devices_lost(ha, 1);
}
if (ha->parent) {
atomic_set(&ha->vp_state, VP_FAILED);
fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
}
ha->flags.management_server_logged_in = 0;
ha->link_data_rate = PORT_SPEED_UNKNOWN;
if (ql2xfdmienable)
set_bit(REGISTER_FDMI_NEEDED, &ha->dpc_flags);
break;
case MBA_LIP_RESET: /* LIP reset occurred */
DEBUG2(printk("scsi(%ld): Asynchronous LIP RESET (%x).\n",
ha->host_no, mb[1]));
qla_printk(KERN_INFO, ha,
"LIP reset occured (%x).\n", mb[1]);
if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
atomic_set(&ha->loop_state, LOOP_DOWN);
atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
qla2x00_mark_all_devices_lost(ha, 1);
}
if (ha->parent) {
atomic_set(&ha->vp_state, VP_FAILED);
fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
}
set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
ha->operating_mode = LOOP;
ha->flags.management_server_logged_in = 0;
break;
case MBA_POINT_TO_POINT: /* Point-to-Point */
if (IS_QLA2100(ha))
break;
DEBUG2(printk("scsi(%ld): Asynchronous P2P MODE received.\n",
ha->host_no));
/*
* Until there's a transition from loop down to loop up, treat
* this as loop down only.
*/
if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
atomic_set(&ha->loop_state, LOOP_DOWN);
if (!atomic_read(&ha->loop_down_timer))
atomic_set(&ha->loop_down_timer,
LOOP_DOWN_TIME);
qla2x00_mark_all_devices_lost(ha, 1);
}
if (ha->parent) {
atomic_set(&ha->vp_state, VP_FAILED);
fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
}
if (!(test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags))) {
set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
}
set_bit(REGISTER_FC4_NEEDED, &ha->dpc_flags);
ha->flags.gpsc_supported = 1;
ha->flags.management_server_logged_in = 0;
break;
case MBA_CHG_IN_CONNECTION: /* Change in connection mode */
if (IS_QLA2100(ha))
break;
DEBUG2(printk("scsi(%ld): Asynchronous Change In Connection "
"received.\n",
ha->host_no));
qla_printk(KERN_INFO, ha,
"Configuration change detected: value=%x.\n", mb[1]);
if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
atomic_set(&ha->loop_state, LOOP_DOWN);
if (!atomic_read(&ha->loop_down_timer))
atomic_set(&ha->loop_down_timer,
LOOP_DOWN_TIME);
qla2x00_mark_all_devices_lost(ha, 1);
}
if (ha->parent) {
atomic_set(&ha->vp_state, VP_FAILED);
fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
}
set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
set_bit(LOCAL_LOOP_UPDATE, &ha->dpc_flags);
break;
case MBA_PORT_UPDATE: /* Port database update */
/*
* If PORT UPDATE is global (recieved LIP_OCCURED/LIP_RESET
* event etc. earlier indicating loop is down) then process
* it. Otherwise ignore it and Wait for RSCN to come in.
*/
atomic_set(&ha->loop_down_timer, 0);
if (atomic_read(&ha->loop_state) != LOOP_DOWN &&
atomic_read(&ha->loop_state) != LOOP_DEAD) {
DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE "
"ignored %04x/%04x/%04x.\n", ha->host_no, mb[1],
mb[2], mb[3]));
break;
}
DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE.\n",
ha->host_no));
DEBUG(printk(KERN_INFO
"scsi(%ld): Port database changed %04x %04x %04x.\n",
ha->host_no, mb[1], mb[2], mb[3]));
/*
* Mark all devices as missing so we will login again.
*/
atomic_set(&ha->loop_state, LOOP_UP);
qla2x00_mark_all_devices_lost(ha, 1);
ha->flags.rscn_queue_overflow = 1;
set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
set_bit(LOCAL_LOOP_UPDATE, &ha->dpc_flags);
break;
case MBA_RSCN_UPDATE: /* State Change Registration */
/* Check if the Vport has issued a SCR */
if (ha->parent && test_bit(VP_SCR_NEEDED, &ha->vp_flags))
break;
/* Only handle SCNs for our Vport index. */
if (ha->flags.npiv_supported && ha->vp_idx != mb[3])
break;
DEBUG2(printk("scsi(%ld): Asynchronous RSCR UPDATE.\n",
ha->host_no));
DEBUG(printk(KERN_INFO
"scsi(%ld): RSCN database changed -- %04x %04x %04x.\n",
ha->host_no, mb[1], mb[2], mb[3]));
rscn_entry = (mb[1] << 16) | mb[2];
host_pid = (ha->d_id.b.domain << 16) | (ha->d_id.b.area << 8) |
ha->d_id.b.al_pa;
if (rscn_entry == host_pid) {
DEBUG(printk(KERN_INFO
"scsi(%ld): Ignoring RSCN update to local host "
"port ID (%06x)\n",
ha->host_no, host_pid));
break;
}
rscn_queue_index = ha->rscn_in_ptr + 1;
if (rscn_queue_index == MAX_RSCN_COUNT)
rscn_queue_index = 0;
if (rscn_queue_index != ha->rscn_out_ptr) {
ha->rscn_queue[ha->rscn_in_ptr] = rscn_entry;
ha->rscn_in_ptr = rscn_queue_index;
} else {
ha->flags.rscn_queue_overflow = 1;
}
atomic_set(&ha->loop_state, LOOP_UPDATE);
atomic_set(&ha->loop_down_timer, 0);
ha->flags.management_server_logged_in = 0;
set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
set_bit(RSCN_UPDATE, &ha->dpc_flags);
break;
/* case MBA_RIO_RESPONSE: */
case MBA_ZIO_RESPONSE:
DEBUG2(printk("scsi(%ld): [R|Z]IO update completion.\n",
ha->host_no));
DEBUG(printk(KERN_INFO
"scsi(%ld): [R|Z]IO update completion.\n",
ha->host_no));
if (IS_FWI2_CAPABLE(ha))
qla24xx_process_response_queue(ha);
else
qla2x00_process_response_queue(ha);
break;
case MBA_DISCARD_RND_FRAME:
DEBUG2(printk("scsi(%ld): Discard RND Frame -- %04x %04x "
"%04x.\n", ha->host_no, mb[1], mb[2], mb[3]));
break;
case MBA_TRACE_NOTIFICATION:
DEBUG2(printk("scsi(%ld): Trace Notification -- %04x %04x.\n",
ha->host_no, mb[1], mb[2]));
break;
}
if (!ha->parent && ha->num_vhosts)
qla2x00_alert_all_vps(ha, mb);
}
static void
qla2x00_adjust_sdev_qdepth_up(struct scsi_device *sdev, void *data)
{
fc_port_t *fcport = data;
if (fcport->ha->max_q_depth <= sdev->queue_depth)
return;
if (sdev->ordered_tags)
scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG,
sdev->queue_depth + 1);
else
scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG,
sdev->queue_depth + 1);
fcport->last_ramp_up = jiffies;
DEBUG2(qla_printk(KERN_INFO, fcport->ha,
"scsi(%ld:%d:%d:%d): Queue depth adjusted-up to %d.\n",
fcport->ha->host_no, sdev->channel, sdev->id, sdev->lun,
sdev->queue_depth));
}
static void
qla2x00_adjust_sdev_qdepth_down(struct scsi_device *sdev, void *data)
{
fc_port_t *fcport = data;
if (!scsi_track_queue_full(sdev, sdev->queue_depth - 1))
return;
DEBUG2(qla_printk(KERN_INFO, fcport->ha,
"scsi(%ld:%d:%d:%d): Queue depth adjusted-down to %d.\n",
fcport->ha->host_no, sdev->channel, sdev->id, sdev->lun,
sdev->queue_depth));
}
static inline void
qla2x00_ramp_up_queue_depth(scsi_qla_host_t *ha, srb_t *sp)
{
fc_port_t *fcport;
struct scsi_device *sdev;
sdev = sp->cmd->device;
if (sdev->queue_depth >= ha->max_q_depth)
return;
fcport = sp->fcport;
if (time_before(jiffies,
fcport->last_ramp_up + ql2xqfullrampup * HZ))
return;
if (time_before(jiffies,
fcport->last_queue_full + ql2xqfullrampup * HZ))
return;
starget_for_each_device(sdev->sdev_target, fcport,
qla2x00_adjust_sdev_qdepth_up);
}
/**
* qla2x00_process_completed_request() - Process a Fast Post response.
* @ha: SCSI driver HA context
* @index: SRB index
*/
static void
qla2x00_process_completed_request(struct scsi_qla_host *ha, uint32_t index)
{
srb_t *sp;
/* Validate handle. */
if (index >= MAX_OUTSTANDING_COMMANDS) {
DEBUG2(printk("scsi(%ld): Invalid SCSI completion handle %d.\n",
ha->host_no, index));
qla_printk(KERN_WARNING, ha,
"Invalid SCSI completion handle %d.\n", index);
set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
return;
}
sp = ha->outstanding_cmds[index];
if (sp) {
/* Free outstanding command slot. */
ha->outstanding_cmds[index] = NULL;
CMD_COMPL_STATUS(sp->cmd) = 0L;
CMD_SCSI_STATUS(sp->cmd) = 0L;
/* Save ISP completion status */
sp->cmd->result = DID_OK << 16;
qla2x00_ramp_up_queue_depth(ha, sp);
qla2x00_sp_compl(ha, sp);
} else {
DEBUG2(printk("scsi(%ld): Invalid ISP SCSI completion handle\n",
ha->host_no));
qla_printk(KERN_WARNING, ha,
"Invalid ISP SCSI completion handle\n");
set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
}
}
/**
* qla2x00_process_response_queue() - Process response queue entries.
* @ha: SCSI driver HA context
*/
void
qla2x00_process_response_queue(struct scsi_qla_host *ha)
{
struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
sts_entry_t *pkt;
uint16_t handle_cnt;
uint16_t cnt;
if (!ha->flags.online)
return;
while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
pkt = (sts_entry_t *)ha->response_ring_ptr;
ha->rsp_ring_index++;
if (ha->rsp_ring_index == ha->response_q_length) {
ha->rsp_ring_index = 0;
ha->response_ring_ptr = ha->response_ring;
} else {
ha->response_ring_ptr++;
}
if (pkt->entry_status != 0) {
DEBUG3(printk(KERN_INFO
"scsi(%ld): Process error entry.\n", ha->host_no));
qla2x00_error_entry(ha, pkt);
((response_t *)pkt)->signature = RESPONSE_PROCESSED;
wmb();
continue;
}
switch (pkt->entry_type) {
case STATUS_TYPE:
qla2x00_status_entry(ha, pkt);
break;
case STATUS_TYPE_21:
handle_cnt = ((sts21_entry_t *)pkt)->handle_count;
for (cnt = 0; cnt < handle_cnt; cnt++) {
qla2x00_process_completed_request(ha,
((sts21_entry_t *)pkt)->handle[cnt]);
}
break;
case STATUS_TYPE_22:
handle_cnt = ((sts22_entry_t *)pkt)->handle_count;
for (cnt = 0; cnt < handle_cnt; cnt++) {
qla2x00_process_completed_request(ha,
((sts22_entry_t *)pkt)->handle[cnt]);
}
break;
case STATUS_CONT_TYPE:
qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
break;
case MS_IOCB_TYPE:
qla2x00_ms_entry(ha, (ms_iocb_entry_t *)pkt);
break;
default:
/* Type Not Supported. */
DEBUG4(printk(KERN_WARNING
"scsi(%ld): Received unknown response pkt type %x "
"entry status=%x.\n",
ha->host_no, pkt->entry_type, pkt->entry_status));
break;
}
((response_t *)pkt)->signature = RESPONSE_PROCESSED;
wmb();
}
/* Adjust ring index */
WRT_REG_WORD(ISP_RSP_Q_OUT(ha, reg), ha->rsp_ring_index);
}
static inline void
qla2x00_handle_sense(srb_t *sp, uint8_t *sense_data, uint32_t sense_len)
{
struct scsi_cmnd *cp = sp->cmd;
if (sense_len >= SCSI_SENSE_BUFFERSIZE)
sense_len = SCSI_SENSE_BUFFERSIZE;
CMD_ACTUAL_SNSLEN(cp) = sense_len;
sp->request_sense_length = sense_len;
sp->request_sense_ptr = cp->sense_buffer;
if (sp->request_sense_length > 32)
sense_len = 32;
memcpy(cp->sense_buffer, sense_data, sense_len);
sp->request_sense_ptr += sense_len;
sp->request_sense_length -= sense_len;
if (sp->request_sense_length != 0)
sp->ha->status_srb = sp;
DEBUG5(printk("%s(): Check condition Sense data, scsi(%ld:%d:%d:%d) "
"cmd=%p pid=%ld\n", __func__, sp->ha->host_no, cp->device->channel,
cp->device->id, cp->device->lun, cp, cp->serial_number));
if (sense_len)
DEBUG5(qla2x00_dump_buffer(cp->sense_buffer,
CMD_ACTUAL_SNSLEN(cp)));
}
/**
* qla2x00_status_entry() - Process a Status IOCB entry.
* @ha: SCSI driver HA context
* @pkt: Entry pointer
*/
static void
qla2x00_status_entry(scsi_qla_host_t *ha, void *pkt)
{
srb_t *sp;
fc_port_t *fcport;
struct scsi_cmnd *cp;
sts_entry_t *sts;
struct sts_entry_24xx *sts24;
uint16_t comp_status;
uint16_t scsi_status;
uint8_t lscsi_status;
int32_t resid;
uint32_t sense_len, rsp_info_len, resid_len, fw_resid_len;
uint8_t *rsp_info, *sense_data;
sts = (sts_entry_t *) pkt;
sts24 = (struct sts_entry_24xx *) pkt;
if (IS_FWI2_CAPABLE(ha)) {
comp_status = le16_to_cpu(sts24->comp_status);
scsi_status = le16_to_cpu(sts24->scsi_status) & SS_MASK;
} else {
comp_status = le16_to_cpu(sts->comp_status);
scsi_status = le16_to_cpu(sts->scsi_status) & SS_MASK;
}
/* Fast path completion. */
if (comp_status == CS_COMPLETE && scsi_status == 0) {
qla2x00_process_completed_request(ha, sts->handle);
return;
}
/* Validate handle. */
if (sts->handle < MAX_OUTSTANDING_COMMANDS) {
sp = ha->outstanding_cmds[sts->handle];
ha->outstanding_cmds[sts->handle] = NULL;
} else
sp = NULL;
if (sp == NULL) {
DEBUG2(printk("scsi(%ld): Status Entry invalid handle.\n",
ha->host_no));
qla_printk(KERN_WARNING, ha, "Status Entry invalid handle.\n");
set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
qla2xxx_wake_dpc(ha);
return;
}
cp = sp->cmd;
if (cp == NULL) {
DEBUG2(printk("scsi(%ld): Command already returned back to OS "
"pkt->handle=%d sp=%p.\n", ha->host_no, sts->handle, sp));
qla_printk(KERN_WARNING, ha,
"Command is NULL: already returned to OS (sp=%p)\n", sp);
return;
}
lscsi_status = scsi_status & STATUS_MASK;
CMD_ENTRY_STATUS(cp) = sts->entry_status;
CMD_COMPL_STATUS(cp) = comp_status;
CMD_SCSI_STATUS(cp) = scsi_status;
fcport = sp->fcport;
sense_len = rsp_info_len = resid_len = fw_resid_len = 0;
if (IS_FWI2_CAPABLE(ha)) {
sense_len = le32_to_cpu(sts24->sense_len);
rsp_info_len = le32_to_cpu(sts24->rsp_data_len);
resid_len = le32_to_cpu(sts24->rsp_residual_count);
fw_resid_len = le32_to_cpu(sts24->residual_len);
rsp_info = sts24->data;
sense_data = sts24->data;
host_to_fcp_swap(sts24->data, sizeof(sts24->data));
} else {
sense_len = le16_to_cpu(sts->req_sense_length);
rsp_info_len = le16_to_cpu(sts->rsp_info_len);
resid_len = le32_to_cpu(sts->residual_length);
rsp_info = sts->rsp_info;
sense_data = sts->req_sense_data;
}
/* Check for any FCP transport errors. */
if (scsi_status & SS_RESPONSE_INFO_LEN_VALID) {
/* Sense data lies beyond any FCP RESPONSE data. */
if (IS_FWI2_CAPABLE(ha))
sense_data += rsp_info_len;
if (rsp_info_len > 3 && rsp_info[3]) {
DEBUG2(printk("scsi(%ld:%d:%d:%d) FCP I/O protocol "
"failure (%x/%02x%02x%02x%02x%02x%02x%02x%02x)..."
"retrying command\n", ha->host_no,
cp->device->channel, cp->device->id,
cp->device->lun, rsp_info_len, rsp_info[0],
rsp_info[1], rsp_info[2], rsp_info[3], rsp_info[4],
rsp_info[5], rsp_info[6], rsp_info[7]));
cp->result = DID_BUS_BUSY << 16;
qla2x00_sp_compl(ha, sp);
return;
}
}
/*
* Based on Host and scsi status generate status code for Linux
*/
switch (comp_status) {
case CS_COMPLETE:
case CS_QUEUE_FULL:
if (scsi_status == 0) {
cp->result = DID_OK << 16;
break;
}
if (scsi_status & (SS_RESIDUAL_UNDER | SS_RESIDUAL_OVER)) {
resid = resid_len;
scsi_set_resid(cp, resid);
CMD_RESID_LEN(cp) = resid;
if (!lscsi_status &&
((unsigned)(scsi_bufflen(cp) - resid) <
cp->underflow)) {
qla_printk(KERN_INFO, ha,
"scsi(%ld:%d:%d:%d): Mid-layer underflow "
"detected (%x of %x bytes)...returning "
"error status.\n", ha->host_no,
cp->device->channel, cp->device->id,
cp->device->lun, resid,
scsi_bufflen(cp));
cp->result = DID_ERROR << 16;
break;
}
}
cp->result = DID_OK << 16 | lscsi_status;
if (lscsi_status == SAM_STAT_TASK_SET_FULL) {
DEBUG2(printk(KERN_INFO
"scsi(%ld): QUEUE FULL status detected "
"0x%x-0x%x.\n", ha->host_no, comp_status,
scsi_status));
/* Adjust queue depth for all luns on the port. */
fcport->last_queue_full = jiffies;
starget_for_each_device(cp->device->sdev_target,
fcport, qla2x00_adjust_sdev_qdepth_down);
break;
}
if (lscsi_status != SS_CHECK_CONDITION)
break;
memset(cp->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
if (!(scsi_status & SS_SENSE_LEN_VALID))
break;
qla2x00_handle_sense(sp, sense_data, sense_len);
break;
case CS_DATA_UNDERRUN:
resid = resid_len;
/* Use F/W calculated residual length. */
if (IS_FWI2_CAPABLE(ha)) {
if (scsi_status & SS_RESIDUAL_UNDER &&
resid != fw_resid_len) {
scsi_status &= ~SS_RESIDUAL_UNDER;
lscsi_status = 0;
}
resid = fw_resid_len;
}
if (scsi_status & SS_RESIDUAL_UNDER) {
scsi_set_resid(cp, resid);
CMD_RESID_LEN(cp) = resid;
} else {
DEBUG2(printk(KERN_INFO
"scsi(%ld:%d:%d) UNDERRUN status detected "
"0x%x-0x%x. resid=0x%x fw_resid=0x%x cdb=0x%x "
"os_underflow=0x%x\n", ha->host_no,
cp->device->id, cp->device->lun, comp_status,
scsi_status, resid_len, resid, cp->cmnd[0],
cp->underflow));
}
/*
* Check to see if SCSI Status is non zero. If so report SCSI
* Status.
*/
if (lscsi_status != 0) {
cp->result = DID_OK << 16 | lscsi_status;
if (lscsi_status == SAM_STAT_TASK_SET_FULL) {
DEBUG2(printk(KERN_INFO
"scsi(%ld): QUEUE FULL status detected "
"0x%x-0x%x.\n", ha->host_no, comp_status,
scsi_status));
/*
* Adjust queue depth for all luns on the
* port.
*/
fcport->last_queue_full = jiffies;
starget_for_each_device(
cp->device->sdev_target, fcport,
qla2x00_adjust_sdev_qdepth_down);
break;
}
if (lscsi_status != SS_CHECK_CONDITION)
break;
memset(cp->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
if (!(scsi_status & SS_SENSE_LEN_VALID))
break;
qla2x00_handle_sense(sp, sense_data, sense_len);
/*
* In case of a Underrun condition, set both the lscsi
* status and the completion status to appropriate
* values.
*/
if (resid &&
((unsigned)(scsi_bufflen(cp) - resid) <
cp->underflow)) {
DEBUG2(qla_printk(KERN_INFO, ha,
"scsi(%ld:%d:%d:%d): Mid-layer underflow "
"detected (%x of %x bytes)...returning "
"error status.\n", ha->host_no,
cp->device->channel, cp->device->id,
cp->device->lun, resid,
scsi_bufflen(cp)));
cp->result = DID_ERROR << 16 | lscsi_status;
}
} else {
/*
* If RISC reports underrun and target does not report
* it then we must have a lost frame, so tell upper
* layer to retry it by reporting a bus busy.
*/
if (!(scsi_status & SS_RESIDUAL_UNDER)) {
DEBUG2(printk("scsi(%ld:%d:%d:%d) Dropped "
"frame(s) detected (%x of %x bytes)..."
"retrying command.\n", ha->host_no,
cp->device->channel, cp->device->id,
cp->device->lun, resid,
scsi_bufflen(cp)));
cp->result = DID_BUS_BUSY << 16;
break;
}
/* Handle mid-layer underflow */
if ((unsigned)(scsi_bufflen(cp) - resid) <
cp->underflow) {
qla_printk(KERN_INFO, ha,
"scsi(%ld:%d:%d:%d): Mid-layer underflow "
"detected (%x of %x bytes)...returning "
"error status.\n", ha->host_no,
cp->device->channel, cp->device->id,
cp->device->lun, resid,
scsi_bufflen(cp));
cp->result = DID_ERROR << 16;
break;
}
/* Everybody online, looking good... */
cp->result = DID_OK << 16;
}
break;
case CS_DATA_OVERRUN:
DEBUG2(printk(KERN_INFO
"scsi(%ld:%d:%d): OVERRUN status detected 0x%x-0x%x\n",
ha->host_no, cp->device->id, cp->device->lun, comp_status,
scsi_status));
DEBUG2(printk(KERN_INFO
"CDB: 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",
cp->cmnd[0], cp->cmnd[1], cp->cmnd[2], cp->cmnd[3],
cp->cmnd[4], cp->cmnd[5]));
DEBUG2(printk(KERN_INFO
"PID=0x%lx req=0x%x xtra=0x%x -- returning DID_ERROR "
"status!\n",
cp->serial_number, scsi_bufflen(cp), resid_len));
cp->result = DID_ERROR << 16;
break;
case CS_PORT_LOGGED_OUT:
case CS_PORT_CONFIG_CHG:
case CS_PORT_BUSY:
case CS_INCOMPLETE:
case CS_PORT_UNAVAILABLE:
/*
* If the port is in Target Down state, return all IOs for this
* Target with DID_NO_CONNECT ELSE Queue the IOs in the
* retry_queue.
*/
DEBUG2(printk("scsi(%ld:%d:%d): status_entry: Port Down "
"pid=%ld, compl status=0x%x, port state=0x%x\n",
ha->host_no, cp->device->id, cp->device->lun,
cp->serial_number, comp_status,
atomic_read(&fcport->state)));
cp->result = DID_BUS_BUSY << 16;
if (atomic_read(&fcport->state) == FCS_ONLINE) {
qla2x00_mark_device_lost(ha, fcport, 1, 1);
}
break;
case CS_RESET:
DEBUG2(printk(KERN_INFO
"scsi(%ld): RESET status detected 0x%x-0x%x.\n",
ha->host_no, comp_status, scsi_status));
cp->result = DID_RESET << 16;
break;
case CS_ABORTED:
/*
* hv2.19.12 - DID_ABORT does not retry the request if we
* aborted this request then abort otherwise it must be a
* reset.
*/
DEBUG2(printk(KERN_INFO
"scsi(%ld): ABORT status detected 0x%x-0x%x.\n",
ha->host_no, comp_status, scsi_status));
cp->result = DID_RESET << 16;
break;
case CS_TIMEOUT:
cp->result = DID_BUS_BUSY << 16;
if (IS_FWI2_CAPABLE(ha)) {
DEBUG2(printk(KERN_INFO
"scsi(%ld:%d:%d:%d): TIMEOUT status detected "
"0x%x-0x%x\n", ha->host_no, cp->device->channel,
cp->device->id, cp->device->lun, comp_status,
scsi_status));
break;
}
DEBUG2(printk(KERN_INFO
"scsi(%ld:%d:%d:%d): TIMEOUT status detected 0x%x-0x%x "
"sflags=%x.\n", ha->host_no, cp->device->channel,
cp->device->id, cp->device->lun, comp_status, scsi_status,
le16_to_cpu(sts->status_flags)));
/* Check to see if logout occurred. */
if ((le16_to_cpu(sts->status_flags) & SF_LOGOUT_SENT))
qla2x00_mark_device_lost(ha, fcport, 1, 1);
break;
default:
DEBUG3(printk("scsi(%ld): Error detected (unknown status) "
"0x%x-0x%x.\n", ha->host_no, comp_status, scsi_status));
qla_printk(KERN_INFO, ha,
"Unknown status detected 0x%x-0x%x.\n",
comp_status, scsi_status);
cp->result = DID_ERROR << 16;
break;
}
/* Place command on done queue. */
if (ha->status_srb == NULL)
qla2x00_sp_compl(ha, sp);
}
/**
* qla2x00_status_cont_entry() - Process a Status Continuations entry.
* @ha: SCSI driver HA context
* @pkt: Entry pointer
*
* Extended sense data.
*/
static void
qla2x00_status_cont_entry(scsi_qla_host_t *ha, sts_cont_entry_t *pkt)
{
uint8_t sense_sz = 0;
srb_t *sp = ha->status_srb;
struct scsi_cmnd *cp;
if (sp != NULL && sp->request_sense_length != 0) {
cp = sp->cmd;
if (cp == NULL) {
DEBUG2(printk("%s(): Cmd already returned back to OS "
"sp=%p.\n", __func__, sp));
qla_printk(KERN_INFO, ha,
"cmd is NULL: already returned to OS (sp=%p)\n",
sp);
ha->status_srb = NULL;
return;
}
if (sp->request_sense_length > sizeof(pkt->data)) {
sense_sz = sizeof(pkt->data);
} else {
sense_sz = sp->request_sense_length;
}
/* Move sense data. */
if (IS_FWI2_CAPABLE(ha))
host_to_fcp_swap(pkt->data, sizeof(pkt->data));
memcpy(sp->request_sense_ptr, pkt->data, sense_sz);
DEBUG5(qla2x00_dump_buffer(sp->request_sense_ptr, sense_sz));
sp->request_sense_ptr += sense_sz;
sp->request_sense_length -= sense_sz;
/* Place command on done queue. */
if (sp->request_sense_length == 0) {
ha->status_srb = NULL;
qla2x00_sp_compl(ha, sp);
}
}
}
/**
* qla2x00_error_entry() - Process an error entry.
* @ha: SCSI driver HA context
* @pkt: Entry pointer
*/
static void
qla2x00_error_entry(scsi_qla_host_t *ha, sts_entry_t *pkt)
{
srb_t *sp;
#if defined(QL_DEBUG_LEVEL_2)
if (pkt->entry_status & RF_INV_E_ORDER)
qla_printk(KERN_ERR, ha, "%s: Invalid Entry Order\n", __func__);
else if (pkt->entry_status & RF_INV_E_COUNT)
qla_printk(KERN_ERR, ha, "%s: Invalid Entry Count\n", __func__);
else if (pkt->entry_status & RF_INV_E_PARAM)
qla_printk(KERN_ERR, ha,
"%s: Invalid Entry Parameter\n", __func__);
else if (pkt->entry_status & RF_INV_E_TYPE)
qla_printk(KERN_ERR, ha, "%s: Invalid Entry Type\n", __func__);
else if (pkt->entry_status & RF_BUSY)
qla_printk(KERN_ERR, ha, "%s: Busy\n", __func__);
else
qla_printk(KERN_ERR, ha, "%s: UNKNOWN flag error\n", __func__);
#endif
/* Validate handle. */
if (pkt->handle < MAX_OUTSTANDING_COMMANDS)
sp = ha->outstanding_cmds[pkt->handle];
else
sp = NULL;
if (sp) {
/* Free outstanding command slot. */
ha->outstanding_cmds[pkt->handle] = NULL;
/* Bad payload or header */
if (pkt->entry_status &
(RF_INV_E_ORDER | RF_INV_E_COUNT |
RF_INV_E_PARAM | RF_INV_E_TYPE)) {
sp->cmd->result = DID_ERROR << 16;
} else if (pkt->entry_status & RF_BUSY) {
sp->cmd->result = DID_BUS_BUSY << 16;
} else {
sp->cmd->result = DID_ERROR << 16;
}
qla2x00_sp_compl(ha, sp);
} else if (pkt->entry_type == COMMAND_A64_TYPE || pkt->entry_type ==
COMMAND_TYPE || pkt->entry_type == COMMAND_TYPE_7) {
DEBUG2(printk("scsi(%ld): Error entry - invalid handle\n",
ha->host_no));
qla_printk(KERN_WARNING, ha,
"Error entry - invalid handle\n");
set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
qla2xxx_wake_dpc(ha);
}
}
/**
* qla2x00_ms_entry() - Process a Management Server entry.
* @ha: SCSI driver HA context
* @index: Response queue out pointer
*/
static void
qla2x00_ms_entry(scsi_qla_host_t *ha, ms_iocb_entry_t *pkt)
{
srb_t *sp;
DEBUG3(printk("%s(%ld): pkt=%p pkthandle=%d.\n",
__func__, ha->host_no, pkt, pkt->handle1));
/* Validate handle. */
if (pkt->handle1 < MAX_OUTSTANDING_COMMANDS)
sp = ha->outstanding_cmds[pkt->handle1];
else
sp = NULL;
if (sp == NULL) {
DEBUG2(printk("scsi(%ld): MS entry - invalid handle\n",
ha->host_no));
qla_printk(KERN_WARNING, ha, "MS entry - invalid handle\n");
set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
return;
}
CMD_COMPL_STATUS(sp->cmd) = le16_to_cpu(pkt->status);
CMD_ENTRY_STATUS(sp->cmd) = pkt->entry_status;
/* Free outstanding command slot. */
ha->outstanding_cmds[pkt->handle1] = NULL;
qla2x00_sp_compl(ha, sp);
}
/**
* qla24xx_mbx_completion() - Process mailbox command completions.
* @ha: SCSI driver HA context
* @mb0: Mailbox0 register
*/
static void
qla24xx_mbx_completion(scsi_qla_host_t *ha, uint16_t mb0)
{
uint16_t cnt;
uint16_t __iomem *wptr;
struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
/* Load return mailbox registers. */
ha->flags.mbox_int = 1;
ha->mailbox_out[0] = mb0;
wptr = (uint16_t __iomem *)&reg->mailbox1;
for (cnt = 1; cnt < ha->mbx_count; cnt++) {
ha->mailbox_out[cnt] = RD_REG_WORD(wptr);
wptr++;
}
if (ha->mcp) {
DEBUG3(printk("%s(%ld): Got mailbox completion. cmd=%x.\n",
__func__, ha->host_no, ha->mcp->mb[0]));
} else {
DEBUG2_3(printk("%s(%ld): MBX pointer ERROR!\n",
__func__, ha->host_no));
}
}
/**
* qla24xx_process_response_queue() - Process response queue entries.
* @ha: SCSI driver HA context
*/
void
qla24xx_process_response_queue(struct scsi_qla_host *ha)
{
struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
struct sts_entry_24xx *pkt;
if (!ha->flags.online)
return;
while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
pkt = (struct sts_entry_24xx *)ha->response_ring_ptr;
ha->rsp_ring_index++;
if (ha->rsp_ring_index == ha->response_q_length) {
ha->rsp_ring_index = 0;
ha->response_ring_ptr = ha->response_ring;
} else {
ha->response_ring_ptr++;
}
if (pkt->entry_status != 0) {
DEBUG3(printk(KERN_INFO
"scsi(%ld): Process error entry.\n", ha->host_no));
qla2x00_error_entry(ha, (sts_entry_t *) pkt);
((response_t *)pkt)->signature = RESPONSE_PROCESSED;
wmb();
continue;
}
switch (pkt->entry_type) {
case STATUS_TYPE:
qla2x00_status_entry(ha, pkt);
break;
case STATUS_CONT_TYPE:
qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
break;
case MS_IOCB_TYPE:
qla24xx_ms_entry(ha, (struct ct_entry_24xx *)pkt);
break;
case VP_RPT_ID_IOCB_TYPE:
qla24xx_report_id_acquisition(ha,
(struct vp_rpt_id_entry_24xx *)pkt);
break;
default:
/* Type Not Supported. */
DEBUG4(printk(KERN_WARNING
"scsi(%ld): Received unknown response pkt type %x "
"entry status=%x.\n",
ha->host_no, pkt->entry_type, pkt->entry_status));
break;
}
((response_t *)pkt)->signature = RESPONSE_PROCESSED;
wmb();
}
/* Adjust ring index */
WRT_REG_DWORD(&reg->rsp_q_out, ha->rsp_ring_index);
}
static void
qla2xxx_check_risc_status(scsi_qla_host_t *ha)
{
int rval;
uint32_t cnt;
struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
if (!IS_QLA25XX(ha))
return;
rval = QLA_SUCCESS;
WRT_REG_DWORD(&reg->iobase_addr, 0x7C00);
RD_REG_DWORD(&reg->iobase_addr);
WRT_REG_DWORD(&reg->iobase_window, 0x0001);
for (cnt = 10000; (RD_REG_DWORD(&reg->iobase_window) & BIT_0) == 0 &&
rval == QLA_SUCCESS; cnt--) {
if (cnt) {
WRT_REG_DWORD(&reg->iobase_window, 0x0001);
udelay(10);
} else
rval = QLA_FUNCTION_TIMEOUT;
}
if (rval == QLA_SUCCESS)
goto next_test;
WRT_REG_DWORD(&reg->iobase_window, 0x0003);
for (cnt = 100; (RD_REG_DWORD(&reg->iobase_window) & BIT_0) == 0 &&
rval == QLA_SUCCESS; cnt--) {
if (cnt) {
WRT_REG_DWORD(&reg->iobase_window, 0x0003);
udelay(10);
} else
rval = QLA_FUNCTION_TIMEOUT;
}
if (rval != QLA_SUCCESS)
goto done;
next_test:
if (RD_REG_DWORD(&reg->iobase_c8) & BIT_3)
qla_printk(KERN_INFO, ha, "Additional code -- 0x55AA.\n");
done:
WRT_REG_DWORD(&reg->iobase_window, 0x0000);
RD_REG_DWORD(&reg->iobase_window);
}
/**
* qla24xx_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
* @irq:
* @dev_id: SCSI driver HA context
*
* Called by system whenever the host adapter generates an interrupt.
*
* Returns handled flag.
*/
irqreturn_t
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers Maintain a per-CPU global "struct pt_regs *" variable which can be used instead of passing regs around manually through all ~1800 interrupt handlers in the Linux kernel. The regs pointer is used in few places, but it potentially costs both stack space and code to pass it around. On the FRV arch, removing the regs parameter from all the genirq function results in a 20% speed up of the IRQ exit path (ie: from leaving timer_interrupt() to leaving do_IRQ()). Where appropriate, an arch may override the generic storage facility and do something different with the variable. On FRV, for instance, the address is maintained in GR28 at all times inside the kernel as part of general exception handling. Having looked over the code, it appears that the parameter may be handed down through up to twenty or so layers of functions. Consider a USB character device attached to a USB hub, attached to a USB controller that posts its interrupts through a cascaded auxiliary interrupt controller. A character device driver may want to pass regs to the sysrq handler through the input layer which adds another few layers of parameter passing. I've build this code with allyesconfig for x86_64 and i386. I've runtested the main part of the code on FRV and i386, though I can't test most of the drivers. I've also done partial conversion for powerpc and MIPS - these at least compile with minimal configurations. This will affect all archs. Mostly the changes should be relatively easy. Take do_IRQ(), store the regs pointer at the beginning, saving the old one: struct pt_regs *old_regs = set_irq_regs(regs); And put the old one back at the end: set_irq_regs(old_regs); Don't pass regs through to generic_handle_irq() or __do_IRQ(). In timer_interrupt(), this sort of change will be necessary: - update_process_times(user_mode(regs)); - profile_tick(CPU_PROFILING, regs); + update_process_times(user_mode(get_irq_regs())); + profile_tick(CPU_PROFILING); I'd like to move update_process_times()'s use of get_irq_regs() into itself, except that i386, alone of the archs, uses something other than user_mode(). Some notes on the interrupt handling in the drivers: (*) input_dev() is now gone entirely. The regs pointer is no longer stored in the input_dev struct. (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does something different depending on whether it's been supplied with a regs pointer or not. (*) Various IRQ handler function pointers have been moved to type irq_handler_t. Signed-Off-By: David Howells <dhowells@redhat.com> (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 13:55:46 +00:00
qla24xx_intr_handler(int irq, void *dev_id)
{
scsi_qla_host_t *ha;
struct device_reg_24xx __iomem *reg;
int status;
unsigned long flags;
unsigned long iter;
uint32_t stat;
uint32_t hccr;
uint16_t mb[4];
ha = (scsi_qla_host_t *) dev_id;
if (!ha) {
printk(KERN_INFO
"%s(): NULL host pointer\n", __func__);
return IRQ_NONE;
}
reg = &ha->iobase->isp24;
status = 0;
spin_lock_irqsave(&ha->hardware_lock, flags);
for (iter = 50; iter--; ) {
stat = RD_REG_DWORD(&reg->host_status);
if (stat & HSRX_RISC_PAUSED) {
if (pci_channel_offline(ha->pdev))
break;
hccr = RD_REG_DWORD(&reg->hccr);
qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
"Dumping firmware!\n", hccr);
qla2xxx_check_risc_status(ha);
ha->isp_ops->fw_dump(ha, 1);
set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
break;
} else if ((stat & HSRX_RISC_INT) == 0)
break;
switch (stat & 0xff) {
case 0x1:
case 0x2:
case 0x10:
case 0x11:
qla24xx_mbx_completion(ha, MSW(stat));
status |= MBX_INTERRUPT;
break;
case 0x12:
mb[0] = MSW(stat);
mb[1] = RD_REG_WORD(&reg->mailbox1);
mb[2] = RD_REG_WORD(&reg->mailbox2);
mb[3] = RD_REG_WORD(&reg->mailbox3);
qla2x00_async_event(ha, mb);
break;
case 0x13:
qla24xx_process_response_queue(ha);
break;
default:
DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
"(%d).\n",
ha->host_no, stat & 0xff));
break;
}
WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
RD_REG_DWORD_RELAXED(&reg->hccr);
}
spin_unlock_irqrestore(&ha->hardware_lock, flags);
if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
(status & MBX_INTERRUPT) && ha->flags.mbox_int) {
set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
up(&ha->mbx_intr_sem);
}
return IRQ_HANDLED;
}
/**
* qla24xx_ms_entry() - Process a Management Server entry.
* @ha: SCSI driver HA context
* @index: Response queue out pointer
*/
static void
qla24xx_ms_entry(scsi_qla_host_t *ha, struct ct_entry_24xx *pkt)
{
srb_t *sp;
DEBUG3(printk("%s(%ld): pkt=%p pkthandle=%d.\n",
__func__, ha->host_no, pkt, pkt->handle));
DEBUG9(printk("%s: ct pkt dump:\n", __func__));
DEBUG9(qla2x00_dump_buffer((void *)pkt, sizeof(struct ct_entry_24xx)));
/* Validate handle. */
if (pkt->handle < MAX_OUTSTANDING_COMMANDS)
sp = ha->outstanding_cmds[pkt->handle];
else
sp = NULL;
if (sp == NULL) {
DEBUG2(printk("scsi(%ld): MS entry - invalid handle\n",
ha->host_no));
DEBUG10(printk("scsi(%ld): MS entry - invalid handle\n",
ha->host_no));
qla_printk(KERN_WARNING, ha, "MS entry - invalid handle %d\n",
pkt->handle);
set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
return;
}
CMD_COMPL_STATUS(sp->cmd) = le16_to_cpu(pkt->comp_status);
CMD_ENTRY_STATUS(sp->cmd) = pkt->entry_status;
/* Free outstanding command slot. */
ha->outstanding_cmds[pkt->handle] = NULL;
qla2x00_sp_compl(ha, sp);
}
static irqreturn_t
qla24xx_msix_rsp_q(int irq, void *dev_id)
{
scsi_qla_host_t *ha;
struct device_reg_24xx __iomem *reg;
unsigned long flags;
ha = dev_id;
reg = &ha->iobase->isp24;
spin_lock_irqsave(&ha->hardware_lock, flags);
qla24xx_process_response_queue(ha);
WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
return IRQ_HANDLED;
}
static irqreturn_t
qla24xx_msix_default(int irq, void *dev_id)
{
scsi_qla_host_t *ha;
struct device_reg_24xx __iomem *reg;
int status;
unsigned long flags;
uint32_t stat;
uint32_t hccr;
uint16_t mb[4];
ha = dev_id;
reg = &ha->iobase->isp24;
status = 0;
spin_lock_irqsave(&ha->hardware_lock, flags);
do {
stat = RD_REG_DWORD(&reg->host_status);
if (stat & HSRX_RISC_PAUSED) {
if (pci_channel_offline(ha->pdev))
break;
hccr = RD_REG_DWORD(&reg->hccr);
qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
"Dumping firmware!\n", hccr);
qla2xxx_check_risc_status(ha);
ha->isp_ops->fw_dump(ha, 1);
set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
break;
} else if ((stat & HSRX_RISC_INT) == 0)
break;
switch (stat & 0xff) {
case 0x1:
case 0x2:
case 0x10:
case 0x11:
qla24xx_mbx_completion(ha, MSW(stat));
status |= MBX_INTERRUPT;
break;
case 0x12:
mb[0] = MSW(stat);
mb[1] = RD_REG_WORD(&reg->mailbox1);
mb[2] = RD_REG_WORD(&reg->mailbox2);
mb[3] = RD_REG_WORD(&reg->mailbox3);
qla2x00_async_event(ha, mb);
break;
case 0x13:
qla24xx_process_response_queue(ha);
break;
default:
DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
"(%d).\n",
ha->host_no, stat & 0xff));
break;
}
WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
} while (0);
spin_unlock_irqrestore(&ha->hardware_lock, flags);
if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
(status & MBX_INTERRUPT) && ha->flags.mbox_int) {
set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
up(&ha->mbx_intr_sem);
}
return IRQ_HANDLED;
}
/* Interrupt handling helpers. */
struct qla_init_msix_entry {
uint16_t entry;
uint16_t index;
const char *name;
irq_handler_t handler;
};
static struct qla_init_msix_entry imsix_entries[QLA_MSIX_ENTRIES] = {
{ QLA_MSIX_DEFAULT, QLA_MIDX_DEFAULT,
"qla2xxx (default)", qla24xx_msix_default },
{ QLA_MSIX_RSP_Q, QLA_MIDX_RSP_Q,
"qla2xxx (rsp_q)", qla24xx_msix_rsp_q },
};
static void
qla24xx_disable_msix(scsi_qla_host_t *ha)
{
int i;
struct qla_msix_entry *qentry;
for (i = 0; i < QLA_MSIX_ENTRIES; i++) {
qentry = &ha->msix_entries[imsix_entries[i].index];
if (qentry->have_irq)
free_irq(qentry->msix_vector, ha);
}
pci_disable_msix(ha->pdev);
}
static int
qla24xx_enable_msix(scsi_qla_host_t *ha)
{
int i, ret;
struct msix_entry entries[QLA_MSIX_ENTRIES];
struct qla_msix_entry *qentry;
for (i = 0; i < QLA_MSIX_ENTRIES; i++)
entries[i].entry = imsix_entries[i].entry;
ret = pci_enable_msix(ha->pdev, entries, ARRAY_SIZE(entries));
if (ret) {
qla_printk(KERN_WARNING, ha,
"MSI-X: Failed to enable support -- %d/%d\n",
QLA_MSIX_ENTRIES, ret);
goto msix_out;
}
ha->flags.msix_enabled = 1;
for (i = 0; i < QLA_MSIX_ENTRIES; i++) {
qentry = &ha->msix_entries[imsix_entries[i].index];
qentry->msix_vector = entries[i].vector;
qentry->msix_entry = entries[i].entry;
qentry->have_irq = 0;
ret = request_irq(qentry->msix_vector,
imsix_entries[i].handler, 0, imsix_entries[i].name, ha);
if (ret) {
qla_printk(KERN_WARNING, ha,
"MSI-X: Unable to register handler -- %x/%d.\n",
imsix_entries[i].index, ret);
qla24xx_disable_msix(ha);
goto msix_out;
}
qentry->have_irq = 1;
}
msix_out:
return ret;
}
int
qla2x00_request_irqs(scsi_qla_host_t *ha)
{
int ret;
/* If possible, enable MSI-X. */
if (!IS_QLA2432(ha) && !IS_QLA2532(ha))
goto skip_msix;
if (IS_QLA2432(ha) && (ha->chip_revision < QLA_MSIX_CHIP_REV_24XX ||
!QLA_MSIX_FW_MODE_1(ha->fw_attributes))) {
DEBUG2(qla_printk(KERN_WARNING, ha,
"MSI-X: Unsupported ISP2432 (0x%X, 0x%X).\n",
ha->chip_revision, ha->fw_attributes));
goto skip_msix;
}
if (ha->pdev->subsystem_vendor == PCI_VENDOR_ID_HP &&
(ha->pdev->subsystem_device == 0x7040 ||
ha->pdev->subsystem_device == 0x7041 ||
ha->pdev->subsystem_device == 0x1705)) {
DEBUG2(qla_printk(KERN_WARNING, ha,
"MSI-X: Unsupported ISP2432 SSVID/SSDID (0x%X, 0x%X).\n",
ha->pdev->subsystem_vendor,
ha->pdev->subsystem_device));
goto skip_msi;
}
ret = qla24xx_enable_msix(ha);
if (!ret) {
DEBUG2(qla_printk(KERN_INFO, ha,
"MSI-X: Enabled (0x%X, 0x%X).\n", ha->chip_revision,
ha->fw_attributes));
return ret;
}
qla_printk(KERN_WARNING, ha,
"MSI-X: Falling back-to INTa mode -- %d.\n", ret);
skip_msix:
if (!IS_QLA24XX(ha) && !IS_QLA2532(ha))
goto skip_msi;
ret = pci_enable_msi(ha->pdev);
if (!ret) {
DEBUG2(qla_printk(KERN_INFO, ha, "MSI: Enabled.\n"));
ha->flags.msi_enabled = 1;
}
skip_msi:
ret = request_irq(ha->pdev->irq, ha->isp_ops->intr_handler,
IRQF_DISABLED|IRQF_SHARED, QLA2XXX_DRIVER_NAME, ha);
if (!ret) {
ha->flags.inta_enabled = 1;
ha->host->irq = ha->pdev->irq;
} else {
qla_printk(KERN_WARNING, ha,
"Failed to reserve interrupt %d already in use.\n",
ha->pdev->irq);
}
return ret;
}
void
qla2x00_free_irqs(scsi_qla_host_t *ha)
{
if (ha->flags.msix_enabled)
qla24xx_disable_msix(ha);
else if (ha->flags.inta_enabled) {
free_irq(ha->host->irq, ha);
pci_disable_msi(ha->pdev);
}
}