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linux-next/drivers/scsi/aacraid/src.c
Guilherme G. Piccoli d1b490939d scsi: aacraid: Add a small delay after IOP reset 
Commit 0e9973ed33 ("scsi: aacraid: Add periodic checks to see IOP reset
status") changed the way driver checks if a reset succeeded. Now, after an
IOP reset, aacraid immediately start polling a register to verify the reset
is complete.

This behavior cause regressions on the reset path in PowerPC (at least).
Since the delay after the IOP reset was removed by the aforementioned patch,
the fact driver just starts to read a register instantly after the reset
was issued (by writing in another register) "corrupts" the reset procedure,
which ends up failing all the time.

The issue highly impacted kdump on PowerPC, since on kdump path we
proactively issue a reset in adapter (through the reset_devices kernel
parameter).

This patch (re-)adds a delay right after IOP reset is issued. Empirically
we measured that 3 seconds is enough, but for safety reasons we delay
for 5s (and since it was 30s before, 5s is still a small amount).

For reference, without this patch we observe the following messages
on kdump kernel boot process:

  [ 76.294] aacraid 0003:01:00.0: IOP reset failed
  [ 76.294] aacraid 0003:01:00.0: ARC Reset attempt failed
  [ 86.524] aacraid 0003:01:00.0: adapter kernel panic'd ff.
  [ 86.524] aacraid 0003:01:00.0: Controller reset type is 3
  [ 86.524] aacraid 0003:01:00.0: Issuing IOP reset
  [146.534] aacraid 0003:01:00.0: IOP reset failed
  [146.534] aacraid 0003:01:00.0: ARC Reset attempt failed

Fixes: 0e9973ed33 ("scsi: aacraid: Add periodic checks to see IOP reset status")
Cc: stable@vger.kernel.org # v4.13+
Signed-off-by: Guilherme G. Piccoli <gpiccoli@linux.vnet.ibm.com>
Acked-by: Dave Carroll <david.carroll@microsemi.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-09-27 21:42:14 -04:00

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/*
* Adaptec AAC series RAID controller driver
* (c) Copyright 2001 Red Hat Inc.
*
* based on the old aacraid driver that is..
* Adaptec aacraid device driver for Linux.
*
* Copyright (c) 2000-2010 Adaptec, Inc.
* 2010-2015 PMC-Sierra, Inc. (aacraid@pmc-sierra.com)
* 2016-2017 Microsemi Corp. (aacraid@microsemi.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Module Name:
* src.c
*
* Abstract: Hardware Device Interface for PMC SRC based controllers
*
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/spinlock.h>
#include <linux/slab.h>
#include <linux/blkdev.h>
#include <linux/delay.h>
#include <linux/completion.h>
#include <linux/time.h>
#include <linux/interrupt.h>
#include <scsi/scsi_host.h>
#include "aacraid.h"
static int aac_src_get_sync_status(struct aac_dev *dev);
static irqreturn_t aac_src_intr_message(int irq, void *dev_id)
{
struct aac_msix_ctx *ctx;
struct aac_dev *dev;
unsigned long bellbits, bellbits_shifted;
int vector_no;
int isFastResponse, mode;
u32 index, handle;
ctx = (struct aac_msix_ctx *)dev_id;
dev = ctx->dev;
vector_no = ctx->vector_no;
if (dev->msi_enabled) {
mode = AAC_INT_MODE_MSI;
if (vector_no == 0) {
bellbits = src_readl(dev, MUnit.ODR_MSI);
if (bellbits & 0x40000)
mode |= AAC_INT_MODE_AIF;
if (bellbits & 0x1000)
mode |= AAC_INT_MODE_SYNC;
}
} else {
mode = AAC_INT_MODE_INTX;
bellbits = src_readl(dev, MUnit.ODR_R);
if (bellbits & PmDoorBellResponseSent) {
bellbits = PmDoorBellResponseSent;
src_writel(dev, MUnit.ODR_C, bellbits);
src_readl(dev, MUnit.ODR_C);
} else {
bellbits_shifted = (bellbits >> SRC_ODR_SHIFT);
src_writel(dev, MUnit.ODR_C, bellbits);
src_readl(dev, MUnit.ODR_C);
if (bellbits_shifted & DoorBellAifPending)
mode |= AAC_INT_MODE_AIF;
else if (bellbits_shifted & OUTBOUNDDOORBELL_0)
mode |= AAC_INT_MODE_SYNC;
}
}
if (mode & AAC_INT_MODE_SYNC) {
unsigned long sflags;
struct list_head *entry;
int send_it = 0;
extern int aac_sync_mode;
if (!aac_sync_mode && !dev->msi_enabled) {
src_writel(dev, MUnit.ODR_C, bellbits);
src_readl(dev, MUnit.ODR_C);
}
if (dev->sync_fib) {
if (dev->sync_fib->callback)
dev->sync_fib->callback(dev->sync_fib->callback_data,
dev->sync_fib);
spin_lock_irqsave(&dev->sync_fib->event_lock, sflags);
if (dev->sync_fib->flags & FIB_CONTEXT_FLAG_WAIT) {
dev->management_fib_count--;
up(&dev->sync_fib->event_wait);
}
spin_unlock_irqrestore(&dev->sync_fib->event_lock,
sflags);
spin_lock_irqsave(&dev->sync_lock, sflags);
if (!list_empty(&dev->sync_fib_list)) {
entry = dev->sync_fib_list.next;
dev->sync_fib = list_entry(entry,
struct fib,
fiblink);
list_del(entry);
send_it = 1;
} else {
dev->sync_fib = NULL;
}
spin_unlock_irqrestore(&dev->sync_lock, sflags);
if (send_it) {
aac_adapter_sync_cmd(dev, SEND_SYNCHRONOUS_FIB,
(u32)dev->sync_fib->hw_fib_pa,
0, 0, 0, 0, 0,
NULL, NULL, NULL, NULL, NULL);
}
}
if (!dev->msi_enabled)
mode = 0;
}
if (mode & AAC_INT_MODE_AIF) {
/* handle AIF */
if (dev->sa_firmware) {
u32 events = src_readl(dev, MUnit.SCR0);
aac_intr_normal(dev, events, 1, 0, NULL);
writel(events, &dev->IndexRegs->Mailbox[0]);
src_writel(dev, MUnit.IDR, 1 << 23);
} else {
if (dev->aif_thread && dev->fsa_dev)
aac_intr_normal(dev, 0, 2, 0, NULL);
}
if (dev->msi_enabled)
aac_src_access_devreg(dev, AAC_CLEAR_AIF_BIT);
mode = 0;
}
if (mode) {
index = dev->host_rrq_idx[vector_no];
for (;;) {
isFastResponse = 0;
/* remove toggle bit (31) */
handle = le32_to_cpu((dev->host_rrq[index])
& 0x7fffffff);
/* check fast response bits (30, 1) */
if (handle & 0x40000000)
isFastResponse = 1;
handle &= 0x0000ffff;
if (handle == 0)
break;
handle >>= 2;
if (dev->msi_enabled && dev->max_msix > 1)
atomic_dec(&dev->rrq_outstanding[vector_no]);
aac_intr_normal(dev, handle, 0, isFastResponse, NULL);
dev->host_rrq[index++] = 0;
if (index == (vector_no + 1) * dev->vector_cap)
index = vector_no * dev->vector_cap;
dev->host_rrq_idx[vector_no] = index;
}
mode = 0;
}
return IRQ_HANDLED;
}
/**
* aac_src_disable_interrupt - Disable interrupts
* @dev: Adapter
*/
static void aac_src_disable_interrupt(struct aac_dev *dev)
{
src_writel(dev, MUnit.OIMR, dev->OIMR = 0xffffffff);
}
/**
* aac_src_enable_interrupt_message - Enable interrupts
* @dev: Adapter
*/
static void aac_src_enable_interrupt_message(struct aac_dev *dev)
{
aac_src_access_devreg(dev, AAC_ENABLE_INTERRUPT);
}
/**
* src_sync_cmd - send a command and wait
* @dev: Adapter
* @command: Command to execute
* @p1: first parameter
* @ret: adapter status
*
* This routine will send a synchronous command to the adapter and wait
* for its completion.
*/
static int src_sync_cmd(struct aac_dev *dev, u32 command,
u32 p1, u32 p2, u32 p3, u32 p4, u32 p5, u32 p6,
u32 *status, u32 * r1, u32 * r2, u32 * r3, u32 * r4)
{
unsigned long start;
unsigned long delay;
int ok;
/*
* Write the command into Mailbox 0
*/
writel(command, &dev->IndexRegs->Mailbox[0]);
/*
* Write the parameters into Mailboxes 1 - 6
*/
writel(p1, &dev->IndexRegs->Mailbox[1]);
writel(p2, &dev->IndexRegs->Mailbox[2]);
writel(p3, &dev->IndexRegs->Mailbox[3]);
writel(p4, &dev->IndexRegs->Mailbox[4]);
/*
* Clear the synch command doorbell to start on a clean slate.
*/
if (!dev->msi_enabled)
src_writel(dev,
MUnit.ODR_C,
OUTBOUNDDOORBELL_0 << SRC_ODR_SHIFT);
/*
* Disable doorbell interrupts
*/
src_writel(dev, MUnit.OIMR, dev->OIMR = 0xffffffff);
/*
* Force the completion of the mask register write before issuing
* the interrupt.
*/
src_readl(dev, MUnit.OIMR);
/*
* Signal that there is a new synch command
*/
src_writel(dev, MUnit.IDR, INBOUNDDOORBELL_0 << SRC_IDR_SHIFT);
if (!dev->sync_mode || command != SEND_SYNCHRONOUS_FIB) {
ok = 0;
start = jiffies;
if (command == IOP_RESET_ALWAYS) {
/* Wait up to 10 sec */
delay = 10*HZ;
} else {
/* Wait up to 5 minutes */
delay = 300*HZ;
}
while (time_before(jiffies, start+delay)) {
udelay(5); /* Delay 5 microseconds to let Mon960 get info. */
/*
* Mon960 will set doorbell0 bit when it has completed the command.
*/
if (aac_src_get_sync_status(dev) & OUTBOUNDDOORBELL_0) {
/*
* Clear the doorbell.
*/
if (dev->msi_enabled)
aac_src_access_devreg(dev,
AAC_CLEAR_SYNC_BIT);
else
src_writel(dev,
MUnit.ODR_C,
OUTBOUNDDOORBELL_0 << SRC_ODR_SHIFT);
ok = 1;
break;
}
/*
* Yield the processor in case we are slow
*/
msleep(1);
}
if (unlikely(ok != 1)) {
/*
* Restore interrupt mask even though we timed out
*/
aac_adapter_enable_int(dev);
return -ETIMEDOUT;
}
/*
* Pull the synch status from Mailbox 0.
*/
if (status)
*status = readl(&dev->IndexRegs->Mailbox[0]);
if (r1)
*r1 = readl(&dev->IndexRegs->Mailbox[1]);
if (r2)
*r2 = readl(&dev->IndexRegs->Mailbox[2]);
if (r3)
*r3 = readl(&dev->IndexRegs->Mailbox[3]);
if (r4)
*r4 = readl(&dev->IndexRegs->Mailbox[4]);
if (command == GET_COMM_PREFERRED_SETTINGS)
dev->max_msix =
readl(&dev->IndexRegs->Mailbox[5]) & 0xFFFF;
/*
* Clear the synch command doorbell.
*/
if (!dev->msi_enabled)
src_writel(dev,
MUnit.ODR_C,
OUTBOUNDDOORBELL_0 << SRC_ODR_SHIFT);
}
/*
* Restore interrupt mask
*/
aac_adapter_enable_int(dev);
return 0;
}
/**
* aac_src_interrupt_adapter - interrupt adapter
* @dev: Adapter
*
* Send an interrupt to the i960 and breakpoint it.
*/
static void aac_src_interrupt_adapter(struct aac_dev *dev)
{
src_sync_cmd(dev, BREAKPOINT_REQUEST,
0, 0, 0, 0, 0, 0,
NULL, NULL, NULL, NULL, NULL);
}
/**
* aac_src_notify_adapter - send an event to the adapter
* @dev: Adapter
* @event: Event to send
*
* Notify the i960 that something it probably cares about has
* happened.
*/
static void aac_src_notify_adapter(struct aac_dev *dev, u32 event)
{
switch (event) {
case AdapNormCmdQue:
src_writel(dev, MUnit.ODR_C,
INBOUNDDOORBELL_1 << SRC_ODR_SHIFT);
break;
case HostNormRespNotFull:
src_writel(dev, MUnit.ODR_C,
INBOUNDDOORBELL_4 << SRC_ODR_SHIFT);
break;
case AdapNormRespQue:
src_writel(dev, MUnit.ODR_C,
INBOUNDDOORBELL_2 << SRC_ODR_SHIFT);
break;
case HostNormCmdNotFull:
src_writel(dev, MUnit.ODR_C,
INBOUNDDOORBELL_3 << SRC_ODR_SHIFT);
break;
case FastIo:
src_writel(dev, MUnit.ODR_C,
INBOUNDDOORBELL_6 << SRC_ODR_SHIFT);
break;
case AdapPrintfDone:
src_writel(dev, MUnit.ODR_C,
INBOUNDDOORBELL_5 << SRC_ODR_SHIFT);
break;
default:
BUG();
break;
}
}
/**
* aac_src_start_adapter - activate adapter
* @dev: Adapter
*
* Start up processing on an i960 based AAC adapter
*/
static void aac_src_start_adapter(struct aac_dev *dev)
{
union aac_init *init;
int i;
/* reset host_rrq_idx first */
for (i = 0; i < dev->max_msix; i++) {
dev->host_rrq_idx[i] = i * dev->vector_cap;
atomic_set(&dev->rrq_outstanding[i], 0);
}
atomic_set(&dev->msix_counter, 0);
dev->fibs_pushed_no = 0;
init = dev->init;
if (dev->comm_interface == AAC_COMM_MESSAGE_TYPE3) {
init->r8.host_elapsed_seconds = cpu_to_le32(get_seconds());
src_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS,
lower_32_bits(dev->init_pa),
upper_32_bits(dev->init_pa),
sizeof(struct _r8) +
(AAC_MAX_HRRQ - 1) * sizeof(struct _rrq),
0, 0, 0, NULL, NULL, NULL, NULL, NULL);
} else {
init->r7.host_elapsed_seconds = cpu_to_le32(get_seconds());
// We can only use a 32 bit address here
src_sync_cmd(dev, INIT_STRUCT_BASE_ADDRESS,
(u32)(ulong)dev->init_pa, 0, 0, 0, 0, 0,
NULL, NULL, NULL, NULL, NULL);
}
}
/**
* aac_src_check_health
* @dev: device to check if healthy
*
* Will attempt to determine if the specified adapter is alive and
* capable of handling requests, returning 0 if alive.
*/
static int aac_src_check_health(struct aac_dev *dev)
{
u32 status = src_readl(dev, MUnit.OMR);
/*
* Check to see if the board panic'd.
*/
if (unlikely(status & KERNEL_PANIC))
goto err_blink;
/*
* Check to see if the board failed any self tests.
*/
if (unlikely(status & SELF_TEST_FAILED))
goto err_out;
/*
* Check to see if the board failed any self tests.
*/
if (unlikely(status & MONITOR_PANIC))
goto err_out;
/*
* Wait for the adapter to be up and running.
*/
if (unlikely(!(status & KERNEL_UP_AND_RUNNING)))
return -3;
/*
* Everything is OK
*/
return 0;
err_out:
return -1;
err_blink:
return (status >> 16) & 0xFF;
}
static inline u32 aac_get_vector(struct aac_dev *dev)
{
return atomic_inc_return(&dev->msix_counter)%dev->max_msix;
}
/**
* aac_src_deliver_message
* @fib: fib to issue
*
* Will send a fib, returning 0 if successful.
*/
static int aac_src_deliver_message(struct fib *fib)
{
struct aac_dev *dev = fib->dev;
struct aac_queue *q = &dev->queues->queue[AdapNormCmdQueue];
u32 fibsize;
dma_addr_t address;
struct aac_fib_xporthdr *pFibX;
int native_hba;
#if !defined(writeq)
unsigned long flags;
#endif
u16 vector_no;
atomic_inc(&q->numpending);
native_hba = (fib->flags & FIB_CONTEXT_FLAG_NATIVE_HBA) ? 1 : 0;
if (dev->msi_enabled && dev->max_msix > 1 &&
(native_hba || fib->hw_fib_va->header.Command != AifRequest)) {
if ((dev->comm_interface == AAC_COMM_MESSAGE_TYPE3)
&& dev->sa_firmware)
vector_no = aac_get_vector(dev);
else
vector_no = fib->vector_no;
if (native_hba) {
if (fib->flags & FIB_CONTEXT_FLAG_NATIVE_HBA_TMF) {
struct aac_hba_tm_req *tm_req;
tm_req = (struct aac_hba_tm_req *)
fib->hw_fib_va;
if (tm_req->iu_type ==
HBA_IU_TYPE_SCSI_TM_REQ) {
((struct aac_hba_tm_req *)
fib->hw_fib_va)->reply_qid
= vector_no;
((struct aac_hba_tm_req *)
fib->hw_fib_va)->request_id
+= (vector_no << 16);
} else {
((struct aac_hba_reset_req *)
fib->hw_fib_va)->reply_qid
= vector_no;
((struct aac_hba_reset_req *)
fib->hw_fib_va)->request_id
+= (vector_no << 16);
}
} else {
((struct aac_hba_cmd_req *)
fib->hw_fib_va)->reply_qid
= vector_no;
((struct aac_hba_cmd_req *)
fib->hw_fib_va)->request_id
+= (vector_no << 16);
}
} else {
fib->hw_fib_va->header.Handle += (vector_no << 16);
}
} else {
vector_no = 0;
}
atomic_inc(&dev->rrq_outstanding[vector_no]);
if (native_hba) {
address = fib->hw_fib_pa;
fibsize = (fib->hbacmd_size + 127) / 128 - 1;
if (fibsize > 31)
fibsize = 31;
address |= fibsize;
#if defined(writeq)
src_writeq(dev, MUnit.IQN_L, (u64)address);
#else
spin_lock_irqsave(&fib->dev->iq_lock, flags);
src_writel(dev, MUnit.IQN_H,
upper_32_bits(address) & 0xffffffff);
src_writel(dev, MUnit.IQN_L, address & 0xffffffff);
spin_unlock_irqrestore(&fib->dev->iq_lock, flags);
#endif
} else {
if (dev->comm_interface == AAC_COMM_MESSAGE_TYPE2 ||
dev->comm_interface == AAC_COMM_MESSAGE_TYPE3) {
/* Calculate the amount to the fibsize bits */
fibsize = (le16_to_cpu(fib->hw_fib_va->header.Size)
+ 127) / 128 - 1;
/* New FIB header, 32-bit */
address = fib->hw_fib_pa;
fib->hw_fib_va->header.StructType = FIB_MAGIC2;
fib->hw_fib_va->header.SenderFibAddress =
cpu_to_le32((u32)address);
fib->hw_fib_va->header.u.TimeStamp = 0;
WARN_ON(upper_32_bits(address) != 0L);
} else {
/* Calculate the amount to the fibsize bits */
fibsize = (sizeof(struct aac_fib_xporthdr) +
le16_to_cpu(fib->hw_fib_va->header.Size)
+ 127) / 128 - 1;
/* Fill XPORT header */
pFibX = (struct aac_fib_xporthdr *)
((unsigned char *)fib->hw_fib_va -
sizeof(struct aac_fib_xporthdr));
pFibX->Handle = fib->hw_fib_va->header.Handle;
pFibX->HostAddress =
cpu_to_le64((u64)fib->hw_fib_pa);
pFibX->Size = cpu_to_le32(
le16_to_cpu(fib->hw_fib_va->header.Size));
address = fib->hw_fib_pa -
(u64)sizeof(struct aac_fib_xporthdr);
}
if (fibsize > 31)
fibsize = 31;
address |= fibsize;
#if defined(writeq)
src_writeq(dev, MUnit.IQ_L, (u64)address);
#else
spin_lock_irqsave(&fib->dev->iq_lock, flags);
src_writel(dev, MUnit.IQ_H,
upper_32_bits(address) & 0xffffffff);
src_writel(dev, MUnit.IQ_L, address & 0xffffffff);
spin_unlock_irqrestore(&fib->dev->iq_lock, flags);
#endif
}
return 0;
}
/**
* aac_src_ioremap
* @size: mapping resize request
*
*/
static int aac_src_ioremap(struct aac_dev *dev, u32 size)
{
if (!size) {
iounmap(dev->regs.src.bar1);
dev->regs.src.bar1 = NULL;
iounmap(dev->regs.src.bar0);
dev->base = dev->regs.src.bar0 = NULL;
return 0;
}
dev->regs.src.bar1 = ioremap(pci_resource_start(dev->pdev, 2),
AAC_MIN_SRC_BAR1_SIZE);
dev->base = NULL;
if (dev->regs.src.bar1 == NULL)
return -1;
dev->base = dev->regs.src.bar0 = ioremap(dev->base_start, size);
if (dev->base == NULL) {
iounmap(dev->regs.src.bar1);
dev->regs.src.bar1 = NULL;
return -1;
}
dev->IndexRegs = &((struct src_registers __iomem *)
dev->base)->u.tupelo.IndexRegs;
return 0;
}
/**
* aac_srcv_ioremap
* @size: mapping resize request
*
*/
static int aac_srcv_ioremap(struct aac_dev *dev, u32 size)
{
if (!size) {
iounmap(dev->regs.src.bar0);
dev->base = dev->regs.src.bar0 = NULL;
return 0;
}
dev->regs.src.bar1 =
ioremap(pci_resource_start(dev->pdev, 2), AAC_MIN_SRCV_BAR1_SIZE);
dev->base = NULL;
if (dev->regs.src.bar1 == NULL)
return -1;
dev->base = dev->regs.src.bar0 = ioremap(dev->base_start, size);
if (dev->base == NULL) {
iounmap(dev->regs.src.bar1);
dev->regs.src.bar1 = NULL;
return -1;
}
dev->IndexRegs = &((struct src_registers __iomem *)
dev->base)->u.denali.IndexRegs;
return 0;
}
void aac_set_intx_mode(struct aac_dev *dev)
{
if (dev->msi_enabled) {
aac_src_access_devreg(dev, AAC_ENABLE_INTX);
dev->msi_enabled = 0;
msleep(5000); /* Delay 5 seconds */
}
}
static void aac_dump_fw_fib_iop_reset(struct aac_dev *dev)
{
__le32 supported_options3;
if (!aac_fib_dump)
return;
supported_options3 = dev->supplement_adapter_info.supported_options3;
if (!(supported_options3 & AAC_OPTION_SUPPORTED3_IOP_RESET_FIB_DUMP))
return;
aac_adapter_sync_cmd(dev, IOP_RESET_FW_FIB_DUMP,
0, 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, NULL);
}
static bool aac_is_ctrl_up_and_running(struct aac_dev *dev)
{
bool ctrl_up = true;
unsigned long status, start;
bool is_up = false;
start = jiffies;
do {
schedule();
status = src_readl(dev, MUnit.OMR);
if (status == 0xffffffff)
status = 0;
if (status & KERNEL_BOOTING) {
start = jiffies;
continue;
}
if (time_after(jiffies, start+HZ*SOFT_RESET_TIME)) {
ctrl_up = false;
break;
}
is_up = status & KERNEL_UP_AND_RUNNING;
} while (!is_up);
return ctrl_up;
}
static void aac_notify_fw_of_iop_reset(struct aac_dev *dev)
{
aac_adapter_sync_cmd(dev, IOP_RESET_ALWAYS, 0, 0, 0, 0, 0, 0, NULL,
NULL, NULL, NULL, NULL);
}
static void aac_send_iop_reset(struct aac_dev *dev)
{
aac_dump_fw_fib_iop_reset(dev);
aac_notify_fw_of_iop_reset(dev);
aac_set_intx_mode(dev);
src_writel(dev, MUnit.IDR, IOP_SRC_RESET_MASK);
msleep(5000);
}
static void aac_send_hardware_soft_reset(struct aac_dev *dev)
{
u_int32_t val;
val = readl(((char *)(dev->base) + IBW_SWR_OFFSET));
val |= 0x01;
writel(val, ((char *)(dev->base) + IBW_SWR_OFFSET));
msleep_interruptible(20000);
}
static int aac_src_restart_adapter(struct aac_dev *dev, int bled, u8 reset_type)
{
bool is_ctrl_up;
int ret = 0;
if (bled < 0)
goto invalid_out;
if (bled)
dev_err(&dev->pdev->dev, "adapter kernel panic'd %x.\n", bled);
/*
* When there is a BlinkLED, IOP_RESET has not effect
*/
if (bled >= 2 && dev->sa_firmware && reset_type & HW_IOP_RESET)
reset_type &= ~HW_IOP_RESET;
dev->a_ops.adapter_enable_int = aac_src_disable_interrupt;
dev_err(&dev->pdev->dev, "Controller reset type is %d\n", reset_type);
if (reset_type & HW_IOP_RESET) {
dev_info(&dev->pdev->dev, "Issuing IOP reset\n");
aac_send_iop_reset(dev);
/*
* Creates a delay or wait till up and running comes thru
*/
is_ctrl_up = aac_is_ctrl_up_and_running(dev);
if (!is_ctrl_up)
dev_err(&dev->pdev->dev, "IOP reset failed\n");
else {
dev_info(&dev->pdev->dev, "IOP reset succeded\n");
goto set_startup;
}
}
if (!dev->sa_firmware) {
dev_err(&dev->pdev->dev, "ARC Reset attempt failed\n");
ret = -ENODEV;
goto out;
}
if (reset_type & HW_SOFT_RESET) {
dev_info(&dev->pdev->dev, "Issuing SOFT reset\n");
aac_send_hardware_soft_reset(dev);
dev->msi_enabled = 0;
is_ctrl_up = aac_is_ctrl_up_and_running(dev);
if (!is_ctrl_up) {
dev_err(&dev->pdev->dev, "SOFT reset failed\n");
ret = -ENODEV;
goto out;
} else
dev_info(&dev->pdev->dev, "SOFT reset succeded\n");
}
set_startup:
if (startup_timeout < 300)
startup_timeout = 300;
out:
return ret;
invalid_out:
if (src_readl(dev, MUnit.OMR) & KERNEL_PANIC)
ret = -ENODEV;
goto out;
}
/**
* aac_src_select_comm - Select communications method
* @dev: Adapter
* @comm: communications method
*/
static int aac_src_select_comm(struct aac_dev *dev, int comm)
{
switch (comm) {
case AAC_COMM_MESSAGE:
dev->a_ops.adapter_intr = aac_src_intr_message;
dev->a_ops.adapter_deliver = aac_src_deliver_message;
break;
default:
return 1;
}
return 0;
}
/**
* aac_src_init - initialize an Cardinal Frey Bar card
* @dev: device to configure
*
*/
int aac_src_init(struct aac_dev *dev)
{
unsigned long start;
unsigned long status;
int restart = 0;
int instance = dev->id;
const char *name = dev->name;
dev->a_ops.adapter_ioremap = aac_src_ioremap;
dev->a_ops.adapter_comm = aac_src_select_comm;
dev->base_size = AAC_MIN_SRC_BAR0_SIZE;
if (aac_adapter_ioremap(dev, dev->base_size)) {
printk(KERN_WARNING "%s: unable to map adapter.\n", name);
goto error_iounmap;
}
/* Failure to reset here is an option ... */
dev->a_ops.adapter_sync_cmd = src_sync_cmd;
dev->a_ops.adapter_enable_int = aac_src_disable_interrupt;
if ((aac_reset_devices || reset_devices) &&
!aac_src_restart_adapter(dev, 0, IOP_HWSOFT_RESET))
++restart;
/*
* Check to see if the board panic'd while booting.
*/
status = src_readl(dev, MUnit.OMR);
if (status & KERNEL_PANIC) {
if (aac_src_restart_adapter(dev,
aac_src_check_health(dev), IOP_HWSOFT_RESET))
goto error_iounmap;
++restart;
}
/*
* Check to see if the board failed any self tests.
*/
status = src_readl(dev, MUnit.OMR);
if (status & SELF_TEST_FAILED) {
printk(KERN_ERR "%s%d: adapter self-test failed.\n",
dev->name, instance);
goto error_iounmap;
}
/*
* Check to see if the monitor panic'd while booting.
*/
if (status & MONITOR_PANIC) {
printk(KERN_ERR "%s%d: adapter monitor panic.\n",
dev->name, instance);
goto error_iounmap;
}
start = jiffies;
/*
* Wait for the adapter to be up and running. Wait up to 3 minutes
*/
while (!((status = src_readl(dev, MUnit.OMR)) &
KERNEL_UP_AND_RUNNING)) {
if ((restart &&
(status & (KERNEL_PANIC|SELF_TEST_FAILED|MONITOR_PANIC))) ||
time_after(jiffies, start+HZ*startup_timeout)) {
printk(KERN_ERR "%s%d: adapter kernel failed to start, init status = %lx.\n",
dev->name, instance, status);
goto error_iounmap;
}
if (!restart &&
((status & (KERNEL_PANIC|SELF_TEST_FAILED|MONITOR_PANIC)) ||
time_after(jiffies, start + HZ *
((startup_timeout > 60)
? (startup_timeout - 60)
: (startup_timeout / 2))))) {
if (likely(!aac_src_restart_adapter(dev,
aac_src_check_health(dev), IOP_HWSOFT_RESET)))
start = jiffies;
++restart;
}
msleep(1);
}
if (restart && aac_commit)
aac_commit = 1;
/*
* Fill in the common function dispatch table.
*/
dev->a_ops.adapter_interrupt = aac_src_interrupt_adapter;
dev->a_ops.adapter_disable_int = aac_src_disable_interrupt;
dev->a_ops.adapter_enable_int = aac_src_disable_interrupt;
dev->a_ops.adapter_notify = aac_src_notify_adapter;
dev->a_ops.adapter_sync_cmd = src_sync_cmd;
dev->a_ops.adapter_check_health = aac_src_check_health;
dev->a_ops.adapter_restart = aac_src_restart_adapter;
dev->a_ops.adapter_start = aac_src_start_adapter;
/*
* First clear out all interrupts. Then enable the one's that we
* can handle.
*/
aac_adapter_comm(dev, AAC_COMM_MESSAGE);
aac_adapter_disable_int(dev);
src_writel(dev, MUnit.ODR_C, 0xffffffff);
aac_adapter_enable_int(dev);
if (aac_init_adapter(dev) == NULL)
goto error_iounmap;
if (dev->comm_interface != AAC_COMM_MESSAGE_TYPE1)
goto error_iounmap;
dev->msi = !pci_enable_msi(dev->pdev);
dev->aac_msix[0].vector_no = 0;
dev->aac_msix[0].dev = dev;
if (request_irq(dev->pdev->irq, dev->a_ops.adapter_intr,
IRQF_SHARED, "aacraid", &(dev->aac_msix[0])) < 0) {
if (dev->msi)
pci_disable_msi(dev->pdev);
printk(KERN_ERR "%s%d: Interrupt unavailable.\n",
name, instance);
goto error_iounmap;
}
dev->dbg_base = pci_resource_start(dev->pdev, 2);
dev->dbg_base_mapped = dev->regs.src.bar1;
dev->dbg_size = AAC_MIN_SRC_BAR1_SIZE;
dev->a_ops.adapter_enable_int = aac_src_enable_interrupt_message;
aac_adapter_enable_int(dev);
if (!dev->sync_mode) {
/*
* Tell the adapter that all is configured, and it can
* start accepting requests
*/
aac_src_start_adapter(dev);
}
return 0;
error_iounmap:
return -1;
}
/**
* aac_srcv_init - initialize an SRCv card
* @dev: device to configure
*
*/
int aac_srcv_init(struct aac_dev *dev)
{
unsigned long start;
unsigned long status;
int restart = 0;
int instance = dev->id;
const char *name = dev->name;
dev->a_ops.adapter_ioremap = aac_srcv_ioremap;
dev->a_ops.adapter_comm = aac_src_select_comm;
dev->base_size = AAC_MIN_SRCV_BAR0_SIZE;
if (aac_adapter_ioremap(dev, dev->base_size)) {
printk(KERN_WARNING "%s: unable to map adapter.\n", name);
goto error_iounmap;
}
/* Failure to reset here is an option ... */
dev->a_ops.adapter_sync_cmd = src_sync_cmd;
dev->a_ops.adapter_enable_int = aac_src_disable_interrupt;
if ((aac_reset_devices || reset_devices) &&
!aac_src_restart_adapter(dev, 0, IOP_HWSOFT_RESET))
++restart;
/*
* Check to see if flash update is running.
* Wait for the adapter to be up and running. Wait up to 5 minutes
*/
status = src_readl(dev, MUnit.OMR);
if (status & FLASH_UPD_PENDING) {
start = jiffies;
do {
status = src_readl(dev, MUnit.OMR);
if (time_after(jiffies, start+HZ*FWUPD_TIMEOUT)) {
printk(KERN_ERR "%s%d: adapter flash update failed.\n",
dev->name, instance);
goto error_iounmap;
}
} while (!(status & FLASH_UPD_SUCCESS) &&
!(status & FLASH_UPD_FAILED));
/* Delay 10 seconds.
* Because right now FW is doing a soft reset,
* do not read scratch pad register at this time
*/
ssleep(10);
}
/*
* Check to see if the board panic'd while booting.
*/
status = src_readl(dev, MUnit.OMR);
if (status & KERNEL_PANIC) {
if (aac_src_restart_adapter(dev,
aac_src_check_health(dev), IOP_HWSOFT_RESET))
goto error_iounmap;
++restart;
}
/*
* Check to see if the board failed any self tests.
*/
status = src_readl(dev, MUnit.OMR);
if (status & SELF_TEST_FAILED) {
printk(KERN_ERR "%s%d: adapter self-test failed.\n", dev->name, instance);
goto error_iounmap;
}
/*
* Check to see if the monitor panic'd while booting.
*/
if (status & MONITOR_PANIC) {
printk(KERN_ERR "%s%d: adapter monitor panic.\n", dev->name, instance);
goto error_iounmap;
}
start = jiffies;
/*
* Wait for the adapter to be up and running. Wait up to 3 minutes
*/
while (!((status = src_readl(dev, MUnit.OMR)) &
KERNEL_UP_AND_RUNNING) ||
status == 0xffffffff) {
if ((restart &&
(status & (KERNEL_PANIC|SELF_TEST_FAILED|MONITOR_PANIC))) ||
time_after(jiffies, start+HZ*startup_timeout)) {
printk(KERN_ERR "%s%d: adapter kernel failed to start, init status = %lx.\n",
dev->name, instance, status);
goto error_iounmap;
}
if (!restart &&
((status & (KERNEL_PANIC|SELF_TEST_FAILED|MONITOR_PANIC)) ||
time_after(jiffies, start + HZ *
((startup_timeout > 60)
? (startup_timeout - 60)
: (startup_timeout / 2))))) {
if (likely(!aac_src_restart_adapter(dev,
aac_src_check_health(dev), IOP_HWSOFT_RESET)))
start = jiffies;
++restart;
}
msleep(1);
}
if (restart && aac_commit)
aac_commit = 1;
/*
* Fill in the common function dispatch table.
*/
dev->a_ops.adapter_interrupt = aac_src_interrupt_adapter;
dev->a_ops.adapter_disable_int = aac_src_disable_interrupt;
dev->a_ops.adapter_enable_int = aac_src_disable_interrupt;
dev->a_ops.adapter_notify = aac_src_notify_adapter;
dev->a_ops.adapter_sync_cmd = src_sync_cmd;
dev->a_ops.adapter_check_health = aac_src_check_health;
dev->a_ops.adapter_restart = aac_src_restart_adapter;
dev->a_ops.adapter_start = aac_src_start_adapter;
/*
* First clear out all interrupts. Then enable the one's that we
* can handle.
*/
aac_adapter_comm(dev, AAC_COMM_MESSAGE);
aac_adapter_disable_int(dev);
src_writel(dev, MUnit.ODR_C, 0xffffffff);
aac_adapter_enable_int(dev);
if (aac_init_adapter(dev) == NULL)
goto error_iounmap;
if ((dev->comm_interface != AAC_COMM_MESSAGE_TYPE2) &&
(dev->comm_interface != AAC_COMM_MESSAGE_TYPE3))
goto error_iounmap;
if (dev->msi_enabled)
aac_src_access_devreg(dev, AAC_ENABLE_MSIX);
if (aac_acquire_irq(dev))
goto error_iounmap;
dev->dbg_base = pci_resource_start(dev->pdev, 2);
dev->dbg_base_mapped = dev->regs.src.bar1;
dev->dbg_size = AAC_MIN_SRCV_BAR1_SIZE;
dev->a_ops.adapter_enable_int = aac_src_enable_interrupt_message;
aac_adapter_enable_int(dev);
if (!dev->sync_mode) {
/*
* Tell the adapter that all is configured, and it can
* start accepting requests
*/
aac_src_start_adapter(dev);
}
return 0;
error_iounmap:
return -1;
}
void aac_src_access_devreg(struct aac_dev *dev, int mode)
{
u_int32_t val;
switch (mode) {
case AAC_ENABLE_INTERRUPT:
src_writel(dev,
MUnit.OIMR,
dev->OIMR = (dev->msi_enabled ?
AAC_INT_ENABLE_TYPE1_MSIX :
AAC_INT_ENABLE_TYPE1_INTX));
break;
case AAC_DISABLE_INTERRUPT:
src_writel(dev,
MUnit.OIMR,
dev->OIMR = AAC_INT_DISABLE_ALL);
break;
case AAC_ENABLE_MSIX:
/* set bit 6 */
val = src_readl(dev, MUnit.IDR);
val |= 0x40;
src_writel(dev, MUnit.IDR, val);
src_readl(dev, MUnit.IDR);
/* unmask int. */
val = PMC_ALL_INTERRUPT_BITS;
src_writel(dev, MUnit.IOAR, val);
val = src_readl(dev, MUnit.OIMR);
src_writel(dev,
MUnit.OIMR,
val & (~(PMC_GLOBAL_INT_BIT2 | PMC_GLOBAL_INT_BIT0)));
break;
case AAC_DISABLE_MSIX:
/* reset bit 6 */
val = src_readl(dev, MUnit.IDR);
val &= ~0x40;
src_writel(dev, MUnit.IDR, val);
src_readl(dev, MUnit.IDR);
break;
case AAC_CLEAR_AIF_BIT:
/* set bit 5 */
val = src_readl(dev, MUnit.IDR);
val |= 0x20;
src_writel(dev, MUnit.IDR, val);
src_readl(dev, MUnit.IDR);
break;
case AAC_CLEAR_SYNC_BIT:
/* set bit 4 */
val = src_readl(dev, MUnit.IDR);
val |= 0x10;
src_writel(dev, MUnit.IDR, val);
src_readl(dev, MUnit.IDR);
break;
case AAC_ENABLE_INTX:
/* set bit 7 */
val = src_readl(dev, MUnit.IDR);
val |= 0x80;
src_writel(dev, MUnit.IDR, val);
src_readl(dev, MUnit.IDR);
/* unmask int. */
val = PMC_ALL_INTERRUPT_BITS;
src_writel(dev, MUnit.IOAR, val);
src_readl(dev, MUnit.IOAR);
val = src_readl(dev, MUnit.OIMR);
src_writel(dev, MUnit.OIMR,
val & (~(PMC_GLOBAL_INT_BIT2)));
break;
default:
break;
}
}
static int aac_src_get_sync_status(struct aac_dev *dev)
{
int val;
if (dev->msi_enabled)
val = src_readl(dev, MUnit.ODR_MSI) & 0x1000 ? 1 : 0;
else
val = src_readl(dev, MUnit.ODR_R) >> SRC_ODR_SHIFT;
return val;
}
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