Commit df613b96 authored by Andrew Vasquez's avatar Andrew Vasquez Committed by James Bottomley
Browse files

[SCSI] qla2xxx: Add Fibre Channel Event (FCE) tracing support.



FCE support enables the firmware to record FC extended link
services and basic link services frames which have been
transmitted and received by the ISP.  This allows for a limited
view of the FC traffic through the ISP without using a FC
analyzer.  This can be useful in situations where a physical
connection to the FC bus is not possible.

The driver exports this information in two ways -- first, via a
debugfs node exported for all supported ISPs under:

	<debugfs_mount_point>/qla2xxx/qla2xxx_<host_no>/fce

where a read of the 'fce' file will provide a snapshot of the
firmware's FCE buffer; and finally, the FCE buffer will be
extracted during a firmware-dump scenario.
Signed-off-by: default avatarAndrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@HansenPartnership.com>
parent 00b6bd25
qla2xxx-y := qla_os.o qla_init.o qla_mbx.o qla_iocb.o qla_isr.o qla_gs.o \
qla_dbg.o qla_sup.o qla_attr.o qla_mid.o
qla_dbg.o qla_sup.o qla_attr.o qla_mid.o qla_dfs.o
obj-$(CONFIG_SCSI_QLA_FC) += qla2xxx.o
......@@ -1051,6 +1051,7 @@ qla25xx_fw_dump(scsi_qla_host_t *ha, int hardware_locked)
struct qla25xx_fw_dump *fw;
uint32_t ext_mem_cnt;
void *nxt;
struct qla2xxx_fce_chain *fcec;
risc_address = ext_mem_cnt = 0;
flags = 0;
......@@ -1321,10 +1322,31 @@ qla25xx_fw_dump(scsi_qla_host_t *ha, int hardware_locked)
if (rval != QLA_SUCCESS)
goto qla25xx_fw_dump_failed_0;
/* Fibre Channel Trace Buffer. */
nxt = qla2xxx_copy_queues(ha, nxt);
if (ha->eft)
memcpy(nxt, ha->eft, ntohl(ha->fw_dump->eft_size));
/* Fibre Channel Event Buffer. */
if (!ha->fce)
goto qla25xx_fw_dump_failed_0;
ha->fw_dump->version |= __constant_htonl(DUMP_CHAIN_VARIANT);
fcec = nxt + ntohl(ha->fw_dump->eft_size);
fcec->type = __constant_htonl(DUMP_CHAIN_FCE | DUMP_CHAIN_LAST);
fcec->chain_size = htonl(sizeof(struct qla2xxx_fce_chain) +
fce_calc_size(ha->fce_bufs));
fcec->size = htonl(fce_calc_size(ha->fce_bufs));
fcec->addr_l = htonl(LSD(ha->fce_dma));
fcec->addr_h = htonl(MSD(ha->fce_dma));
iter_reg = fcec->eregs;
for (cnt = 0; cnt < 8; cnt++)
*iter_reg++ = htonl(ha->fce_mb[cnt]);
memcpy(iter_reg, ha->fce, ntohl(fcec->size));
qla25xx_fw_dump_failed_0:
if (rval != QLA_SUCCESS) {
qla_printk(KERN_WARNING, ha,
......
......@@ -256,6 +256,25 @@ struct qla25xx_fw_dump {
#define EFT_BYTES_PER_BUFFER 0x4000
#define EFT_SIZE ((EFT_BYTES_PER_BUFFER) * (EFT_NUM_BUFFERS))
#define FCE_NUM_BUFFERS 64
#define FCE_BYTES_PER_BUFFER 0x400
#define FCE_SIZE ((FCE_BYTES_PER_BUFFER) * (FCE_NUM_BUFFERS))
#define fce_calc_size(b) ((FCE_BYTES_PER_BUFFER) * (b))
struct qla2xxx_fce_chain {
uint32_t type;
uint32_t chain_size;
uint32_t size;
uint32_t addr_l;
uint32_t addr_h;
uint32_t eregs[8];
};
#define DUMP_CHAIN_VARIANT 0x80000000
#define DUMP_CHAIN_FCE 0x7FFFFAF0
#define DUMP_CHAIN_LAST 0x80000000
struct qla2xxx_fw_dump {
uint8_t signature[4];
uint32_t version;
......
......@@ -2156,6 +2156,7 @@ typedef struct scsi_qla_host {
uint32_t gpsc_supported :1;
uint32_t vsan_enabled :1;
uint32_t npiv_supported :1;
uint32_t fce_enabled :1;
} flags;
atomic_t loop_state;
......@@ -2449,6 +2450,15 @@ typedef struct scsi_qla_host {
dma_addr_t eft_dma;
void *eft;
struct dentry *dfs_dir;
struct dentry *dfs_fce;
dma_addr_t fce_dma;
void *fce;
uint32_t fce_bufs;
uint16_t fce_mb[8];
uint64_t fce_wr, fce_rd;
struct mutex fce_mutex;
uint8_t host_str[16];
uint32_t pci_attr;
uint16_t chip_revision;
......
/*
* 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/debugfs.h>
#include <linux/seq_file.h>
static struct dentry *qla2x00_dfs_root;
static atomic_t qla2x00_dfs_root_count;
static int
qla2x00_dfs_fce_show(struct seq_file *s, void *unused)
{
scsi_qla_host_t *ha = s->private;
uint32_t cnt;
uint32_t *fce;
uint64_t fce_start;
mutex_lock(&ha->fce_mutex);
seq_printf(s, "FCE Trace Buffer\n");
seq_printf(s, "In Pointer = %llx\n\n", ha->fce_wr);
seq_printf(s, "Base = %llx\n\n", (unsigned long long) ha->fce_dma);
seq_printf(s, "FCE Enable Registers\n");
seq_printf(s, "%08x %08x %08x %08x %08x %08x\n",
ha->fce_mb[0], ha->fce_mb[2], ha->fce_mb[3], ha->fce_mb[4],
ha->fce_mb[5], ha->fce_mb[6]);
fce = (uint32_t *) ha->fce;
fce_start = (unsigned long long) ha->fce_dma;
for (cnt = 0; cnt < fce_calc_size(ha->fce_bufs) / 4; cnt++) {
if (cnt % 8 == 0)
seq_printf(s, "\n%llx: ",
(unsigned long long)((cnt * 4) + fce_start));
else
seq_printf(s, " ");
seq_printf(s, "%08x", *fce++);
}
seq_printf(s, "\nEnd\n");
mutex_unlock(&ha->fce_mutex);
return 0;
}
static int
qla2x00_dfs_fce_open(struct inode *inode, struct file *file)
{
scsi_qla_host_t *ha = inode->i_private;
int rval;
if (!ha->flags.fce_enabled)
goto out;
mutex_lock(&ha->fce_mutex);
/* Pause tracing to flush FCE buffers. */
rval = qla2x00_disable_fce_trace(ha, &ha->fce_wr, &ha->fce_rd);
if (rval)
qla_printk(KERN_WARNING, ha,
"DebugFS: Unable to disable FCE (%d).\n", rval);
ha->flags.fce_enabled = 0;
mutex_unlock(&ha->fce_mutex);
out:
return single_open(file, qla2x00_dfs_fce_show, ha);
}
static int
qla2x00_dfs_fce_release(struct inode *inode, struct file *file)
{
scsi_qla_host_t *ha = inode->i_private;
int rval;
if (ha->flags.fce_enabled)
goto out;
mutex_lock(&ha->fce_mutex);
/* Re-enable FCE tracing. */
ha->flags.fce_enabled = 1;
memset(ha->fce, 0, fce_calc_size(ha->fce_bufs));
rval = qla2x00_enable_fce_trace(ha, ha->fce_dma, ha->fce_bufs,
ha->fce_mb, &ha->fce_bufs);
if (rval) {
qla_printk(KERN_WARNING, ha,
"DebugFS: Unable to reinitialize FCE (%d).\n", rval);
ha->flags.fce_enabled = 0;
}
mutex_unlock(&ha->fce_mutex);
out:
return single_release(inode, file);
}
static const struct file_operations dfs_fce_ops = {
.open = qla2x00_dfs_fce_open,
.read = seq_read,
.llseek = seq_lseek,
.release = qla2x00_dfs_fce_release,
};
int
qla2x00_dfs_setup(scsi_qla_host_t *ha)
{
if (!IS_QLA25XX(ha))
goto out;
if (!ha->fce)
goto out;
if (qla2x00_dfs_root)
goto create_dir;
atomic_set(&qla2x00_dfs_root_count, 0);
qla2x00_dfs_root = debugfs_create_dir(QLA2XXX_DRIVER_NAME, NULL);
if (!qla2x00_dfs_root) {
qla_printk(KERN_NOTICE, ha,
"DebugFS: Unable to create root directory.\n");
goto out;
}
create_dir:
if (ha->dfs_dir)
goto create_nodes;
mutex_init(&ha->fce_mutex);
ha->dfs_dir = debugfs_create_dir(ha->host_str, qla2x00_dfs_root);
if (!ha->dfs_dir) {
qla_printk(KERN_NOTICE, ha,
"DebugFS: Unable to create ha directory.\n");
goto out;
}
atomic_inc(&qla2x00_dfs_root_count);
create_nodes:
ha->dfs_fce = debugfs_create_file("fce", S_IRUSR, ha->dfs_dir, ha,
&dfs_fce_ops);
if (!ha->dfs_fce) {
qla_printk(KERN_NOTICE, ha,
"DebugFS: Unable to fce node.\n");
goto out;
}
out:
return 0;
}
int
qla2x00_dfs_remove(scsi_qla_host_t *ha)
{
if (ha->dfs_fce) {
debugfs_remove(ha->dfs_fce);
ha->dfs_fce = NULL;
}
if (ha->dfs_dir) {
debugfs_remove(ha->dfs_dir);
ha->dfs_dir = NULL;
atomic_dec(&qla2x00_dfs_root_count);
}
if (atomic_read(&qla2x00_dfs_root_count) == 0 &&
qla2x00_dfs_root) {
debugfs_remove(qla2x00_dfs_root);
qla2x00_dfs_root = NULL;
}
return 0;
}
......@@ -959,6 +959,13 @@ struct device_reg_24xx {
#define TC_EFT_ENABLE 4
#define TC_EFT_DISABLE 5
#define TC_FCE_ENABLE 8
#define TC_FCE_OPTIONS 0
#define TC_FCE_DEFAULT_RX_SIZE 2112
#define TC_FCE_DEFAULT_TX_SIZE 2112
#define TC_FCE_DISABLE 9
#define TC_FCE_DISABLE_TRACE BIT_0
/* MID Support ***************************************************************/
#define MIN_MULTI_ID_FABRIC 64 /* Must be power-of-2. */
......
......@@ -232,6 +232,13 @@ qla2x00_enable_eft_trace(scsi_qla_host_t *, dma_addr_t, uint16_t);
extern int
qla2x00_disable_eft_trace(scsi_qla_host_t *);
extern int
qla2x00_enable_fce_trace(scsi_qla_host_t *, dma_addr_t, uint16_t , uint16_t *,
uint32_t *);
extern int
qla2x00_disable_fce_trace(scsi_qla_host_t *, uint64_t *, uint64_t *);
extern int
qla2x00_read_sfp(scsi_qla_host_t *, dma_addr_t, uint16_t, uint16_t, uint16_t);
......@@ -334,4 +341,10 @@ extern void qla2x00_free_sysfs_attr(scsi_qla_host_t *);
extern void qla2x00_init_host_attr(scsi_qla_host_t *);
extern void qla2x00_alloc_sysfs_attr(scsi_qla_host_t *);
extern void qla2x00_free_sysfs_attr(scsi_qla_host_t *);
/*
* Global Function Prototypes in qla_dfs.c source file.
*/
extern int qla2x00_dfs_setup(scsi_qla_host_t *);
extern int qla2x00_dfs_remove(scsi_qla_host_t *);
#endif /* _QLA_GBL_H */
......@@ -732,9 +732,9 @@ qla2x00_alloc_fw_dump(scsi_qla_host_t *ha)
{
int rval;
uint32_t dump_size, fixed_size, mem_size, req_q_size, rsp_q_size,
eft_size;
dma_addr_t eft_dma;
void *eft;
eft_size, fce_size;
dma_addr_t tc_dma;
void *tc;
if (ha->fw_dump) {
qla_printk(KERN_WARNING, ha,
......@@ -743,7 +743,7 @@ qla2x00_alloc_fw_dump(scsi_qla_host_t *ha)
}
ha->fw_dumped = 0;
fixed_size = mem_size = eft_size = 0;
fixed_size = mem_size = eft_size = fce_size = 0;
if (IS_QLA2100(ha) || IS_QLA2200(ha)) {
fixed_size = sizeof(struct qla2100_fw_dump);
} else if (IS_QLA23XX(ha)) {
......@@ -758,20 +758,20 @@ qla2x00_alloc_fw_dump(scsi_qla_host_t *ha)
sizeof(uint32_t);
/* Allocate memory for Extended Trace Buffer. */
eft = dma_alloc_coherent(&ha->pdev->dev, EFT_SIZE, &eft_dma,
tc = dma_alloc_coherent(&ha->pdev->dev, EFT_SIZE, &tc_dma,
GFP_KERNEL);
if (!eft) {
if (!tc) {
qla_printk(KERN_WARNING, ha, "Unable to allocate "
"(%d KB) for EFT.\n", EFT_SIZE / 1024);
goto cont_alloc;
}
rval = qla2x00_enable_eft_trace(ha, eft_dma, EFT_NUM_BUFFERS);
rval = qla2x00_enable_eft_trace(ha, tc_dma, EFT_NUM_BUFFERS);
if (rval) {
qla_printk(KERN_WARNING, ha, "Unable to initialize "
"EFT (%d).\n", rval);
dma_free_coherent(&ha->pdev->dev, EFT_SIZE, eft,
eft_dma);
dma_free_coherent(&ha->pdev->dev, EFT_SIZE, tc,
tc_dma);
goto cont_alloc;
}
......@@ -779,9 +779,41 @@ qla2x00_alloc_fw_dump(scsi_qla_host_t *ha)
EFT_SIZE / 1024);
eft_size = EFT_SIZE;
memset(eft, 0, eft_size);
ha->eft_dma = eft_dma;
ha->eft = eft;
memset(tc, 0, eft_size);
ha->eft_dma = tc_dma;
ha->eft = tc;
/* Allocate memory for Fibre Channel Event Buffer. */
if (!IS_QLA25XX(ha))
goto cont_alloc;
tc = dma_alloc_coherent(&ha->pdev->dev, FCE_SIZE, &tc_dma,
GFP_KERNEL);
if (!tc) {
qla_printk(KERN_WARNING, ha, "Unable to allocate "
"(%d KB) for FCE.\n", FCE_SIZE / 1024);
goto cont_alloc;
}
memset(tc, 0, FCE_SIZE);
rval = qla2x00_enable_fce_trace(ha, tc_dma, FCE_NUM_BUFFERS,
ha->fce_mb, &ha->fce_bufs);
if (rval) {
qla_printk(KERN_WARNING, ha, "Unable to initialize "
"FCE (%d).\n", rval);
dma_free_coherent(&ha->pdev->dev, FCE_SIZE, tc,
tc_dma);
ha->flags.fce_enabled = 0;
goto cont_alloc;
}
qla_printk(KERN_INFO, ha, "Allocated (%d KB) for FCE...\n",
FCE_SIZE / 1024);
fce_size = sizeof(struct qla2xxx_fce_chain) + EFT_SIZE;
ha->flags.fce_enabled = 1;
ha->fce_dma = tc_dma;
ha->fce = tc;
}
cont_alloc:
req_q_size = ha->request_q_length * sizeof(request_t);
......@@ -789,7 +821,7 @@ cont_alloc:
dump_size = offsetof(struct qla2xxx_fw_dump, isp);
dump_size += fixed_size + mem_size + req_q_size + rsp_q_size +
eft_size;
eft_size + fce_size;
ha->fw_dump = vmalloc(dump_size);
if (!ha->fw_dump) {
......@@ -3247,6 +3279,21 @@ qla2x00_abort_isp(scsi_qla_host_t *ha)
"(%d).\n", rval);
}
}
if (ha->fce) {
ha->flags.fce_enabled = 1;
memset(ha->fce, 0,
fce_calc_size(ha->fce_bufs));
rval = qla2x00_enable_fce_trace(ha,
ha->fce_dma, ha->fce_bufs, ha->fce_mb,
&ha->fce_bufs);
if (rval) {
qla_printk(KERN_WARNING, ha,
"Unable to reinitialize FCE "
"(%d).\n", rval);
ha->flags.fce_enabled = 0;
}
}
} else { /* failed the ISP abort */
ha->flags.online = 1;
if (test_bit(ISP_ABORT_RETRY, &ha->dpc_flags)) {
......
......@@ -2414,6 +2414,93 @@ qla2x00_disable_eft_trace(scsi_qla_host_t *ha)
return rval;
}
int
qla2x00_enable_fce_trace(scsi_qla_host_t *ha, dma_addr_t fce_dma,
uint16_t buffers, uint16_t *mb, uint32_t *dwords)
{
int rval;
mbx_cmd_t mc;
mbx_cmd_t *mcp = &mc;
if (!IS_QLA25XX(ha))
return QLA_FUNCTION_FAILED;
DEBUG11(printk("%s(%ld): entered.\n", __func__, ha->host_no));
mcp->mb[0] = MBC_TRACE_CONTROL;
mcp->mb[1] = TC_FCE_ENABLE;
mcp->mb[2] = LSW(fce_dma);
mcp->mb[3] = MSW(fce_dma);
mcp->mb[4] = LSW(MSD(fce_dma));
mcp->mb[5] = MSW(MSD(fce_dma));
mcp->mb[6] = buffers;
mcp->mb[7] = TC_AEN_DISABLE;
mcp->mb[8] = 0;
mcp->mb[9] = TC_FCE_DEFAULT_RX_SIZE;
mcp->mb[10] = TC_FCE_DEFAULT_TX_SIZE;
mcp->out_mb = MBX_10|MBX_9|MBX_8|MBX_7|MBX_6|MBX_5|MBX_4|MBX_3|MBX_2|
MBX_1|MBX_0;
mcp->in_mb = MBX_6|MBX_5|MBX_4|MBX_3|MBX_2|MBX_1|MBX_0;
mcp->tov = 30;
mcp->flags = 0;
rval = qla2x00_mailbox_command(ha, mcp);
if (rval != QLA_SUCCESS) {
DEBUG2_3_11(printk("%s(%ld): failed=%x mb[0]=%x mb[1]=%x.\n",
__func__, ha->host_no, rval, mcp->mb[0], mcp->mb[1]));
} else {
DEBUG11(printk("%s(%ld): done.\n", __func__, ha->host_no));
if (mb)
memcpy(mb, mcp->mb, 8 * sizeof(*mb));
if (dwords)
*dwords = mcp->mb[6];
}
return rval;
}
int
qla2x00_disable_fce_trace(scsi_qla_host_t *ha, uint64_t *wr, uint64_t *rd)
{
int rval;
mbx_cmd_t mc;
mbx_cmd_t *mcp = &mc;
if (!IS_FWI2_CAPABLE(ha))
return QLA_FUNCTION_FAILED;
DEBUG11(printk("%s(%ld): entered.\n", __func__, ha->host_no));
mcp->mb[0] = MBC_TRACE_CONTROL;
mcp->mb[1] = TC_FCE_DISABLE;
mcp->mb[2] = TC_FCE_DISABLE_TRACE;
mcp->out_mb = MBX_2|MBX_1|MBX_0;
mcp->in_mb = MBX_9|MBX_8|MBX_7|MBX_6|MBX_5|MBX_4|MBX_3|MBX_2|
MBX_1|MBX_0;
mcp->tov = 30;
mcp->flags = 0;
rval = qla2x00_mailbox_command(ha, mcp);
if (rval != QLA_SUCCESS) {
DEBUG2_3_11(printk("%s(%ld): failed=%x mb[0]=%x mb[1]=%x.\n",
__func__, ha->host_no, rval, mcp->mb[0], mcp->mb[1]));
} else {
DEBUG11(printk("%s(%ld): done.\n", __func__, ha->host_no));
if (wr)
*wr = (uint64_t) mcp->mb[5] << 48 |
(uint64_t) mcp->mb[4] << 32 |
(uint64_t) mcp->mb[3] << 16 |
(uint64_t) mcp->mb[2];
if (rd)
*rd = (uint64_t) mcp->mb[9] << 48 |
(uint64_t) mcp->mb[8] << 32 |
(uint64_t) mcp->mb[7] << 16 |
(uint64_t) mcp->mb[6];
}
return rval;
}
int
qla2x00_read_sfp(scsi_qla_host_t *ha, dma_addr_t sfp_dma, uint16_t addr,
uint16_t off, uint16_t count)
......
......@@ -1791,6 +1791,8 @@ qla2x00_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
qla2x00_init_host_attr(ha);
qla2x00_dfs_setup(ha);
qla_printk(KERN_INFO, ha, "\n"
" QLogic Fibre Channel HBA Driver: %s\n"
" QLogic %s - %s\n"
......@@ -1822,6 +1824,8 @@ qla2x00_remove_one(struct pci_dev *pdev)
ha = pci_get_drvdata(pdev);
qla2x00_dfs_remove(ha);
qla2x00_free_sysfs_attr(ha);
fc_remove_host(ha->host);
......@@ -1855,6 +1859,9 @@ qla2x00_free_device(scsi_qla_host_t *ha)
kthread_stop(t);
}
if (ha->flags.fce_enabled)
qla2x00_disable_fce_trace(ha, NULL, NULL);
if (ha->eft)
qla2x00_disable_eft_trace(ha);
......@@ -2212,6 +2219,10 @@ qla2x00_mem_free(scsi_qla_host_t *ha)
/* free sp pool */
qla2x00_free_sp_pool(ha);
if (ha->fce)
dma_free_coherent(&ha->pdev->dev, FCE_SIZE, ha->fce,
ha->fce_dma);
if (ha->fw_dump) {
if (ha->eft)
dma_free_coherent(&ha->pdev->dev,
......
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