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bna: Add debugfs interface. 

Change details:
	- Add debugfs support to obtain firmware trace, saved firmware trace on
	  an IOC crash, driver info and read/write to registers.

	- debugfs hierarchy:
	  bna/pci_dev:<pci_name>
	  where the pci_name corresponds to the one under /sys/bus/pci/drivers/bna

	- Following are the new debugfs entries added:
	  fwtrc: collect current firmware trace.
	  fwsave: collect last saved fw trace as a result of firmware crash.
	  regwr: write one word to chip register
	  regrd: read one or more words from chip register.
	  drvinfo: collect the driver information.

Signed-off-by: Krishna Gudipati <kgudipat@brocade.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Krishna Gudipati 2011-12-22 13:30:19 +00:00 committed by David S. Miller
parent 72a9730b3f
commit 7afc5dbde0
10 changed files with 827 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/net/ethernet/brocade/bna/Makefile
View File

@ -5,7 +5,7 @@
obj-$(CONFIG_BNA) += bna.o
bna-objs := bnad.o bnad_ethtool.o bna_enet.o bna_tx_rx.o
bna-objs := bnad.o bnad_ethtool.o bnad_debugfs.o bna_enet.o bna_tx_rx.o
bna-objs += bfa_msgq.o bfa_ioc.o bfa_ioc_ct.o bfa_cee.o
bna-objs += cna_fwimg.o

35
drivers/net/ethernet/brocade/bna/bfa_cee.c
View File

@ -184,6 +184,41 @@ bfa_nw_cee_mem_claim(struct bfa_cee *cee, u8 *dma_kva, u64 dma_pa)
(dma_kva + bfa_cee_attr_meminfo());
}
/**
* bfa_cee_get_attr()
*
* @brief Send the request to the f/w to fetch CEE attributes.
*
* @param[in] Pointer to the CEE module data structure.
*
* @return Status
*/
enum bfa_status
bfa_nw_cee_get_attr(struct bfa_cee *cee, struct bfa_cee_attr *attr,
bfa_cee_get_attr_cbfn_t cbfn, void *cbarg)
{
struct bfi_cee_get_req *cmd;
BUG_ON(!((cee != NULL) && (cee->ioc != NULL)));
if (!bfa_nw_ioc_is_operational(cee->ioc))
return BFA_STATUS_IOC_FAILURE;
if (cee->get_attr_pending == true)
return BFA_STATUS_DEVBUSY;
cee->get_attr_pending = true;
cmd = (struct bfi_cee_get_req *) cee->get_cfg_mb.msg;
cee->attr = attr;
cee->cbfn.get_attr_cbfn = cbfn;
cee->cbfn.get_attr_cbarg = cbarg;
bfi_h2i_set(cmd->mh, BFI_MC_CEE, BFI_CEE_H2I_GET_CFG_REQ,
bfa_ioc_portid(cee->ioc));
bfa_dma_be_addr_set(cmd->dma_addr, cee->attr_dma.pa);
bfa_nw_ioc_mbox_queue(cee->ioc, &cee->get_cfg_mb, NULL, NULL);
return BFA_STATUS_OK;
}
/**
* bfa_cee_isrs()
*

4
drivers/net/ethernet/brocade/bna/bfa_cee.h
View File

@ -59,5 +59,7 @@ u32 bfa_nw_cee_meminfo(void);
void bfa_nw_cee_mem_claim(struct bfa_cee *cee, u8 *dma_kva,
u64 dma_pa);
void bfa_nw_cee_attach(struct bfa_cee *cee, struct bfa_ioc *ioc, void *dev);
enum bfa_status bfa_nw_cee_get_attr(struct bfa_cee *cee,
struct bfa_cee_attr *attr,
bfa_cee_get_attr_cbfn_t cbfn, void *cbarg);
#endif /* __BFA_CEE_H__ */

121
drivers/net/ethernet/brocade/bna/bfa_ioc.c
View File

@ -74,6 +74,7 @@ static void bfa_ioc_check_attr_wwns(struct bfa_ioc *ioc);
static void bfa_ioc_event_notify(struct bfa_ioc *, enum bfa_ioc_event);
static void bfa_ioc_disable_comp(struct bfa_ioc *ioc);
static void bfa_ioc_lpu_stop(struct bfa_ioc *ioc);
static void bfa_nw_ioc_debug_save_ftrc(struct bfa_ioc *ioc);
static void bfa_ioc_fail_notify(struct bfa_ioc *ioc);
static void bfa_ioc_pf_enabled(struct bfa_ioc *ioc);
static void bfa_ioc_pf_disabled(struct bfa_ioc *ioc);
@ -997,6 +998,7 @@ bfa_iocpf_sm_disabled(struct bfa_iocpf *iocpf, enum iocpf_event event)
static void
bfa_iocpf_sm_initfail_sync_entry(struct bfa_iocpf *iocpf)
{
bfa_nw_ioc_debug_save_ftrc(iocpf->ioc);
bfa_ioc_hw_sem_get(iocpf->ioc);
}
@ -1743,6 +1745,114 @@ bfa_ioc_mbox_flush(struct bfa_ioc *ioc)
bfa_q_deq(&mod->cmd_q, &cmd);
}
/**
* Read data from SMEM to host through PCI memmap
*
* @param[in] ioc memory for IOC
* @param[in] tbuf app memory to store data from smem
* @param[in] soff smem offset
* @param[in] sz size of smem in bytes
*/
static int
bfa_nw_ioc_smem_read(struct bfa_ioc *ioc, void *tbuf, u32 soff, u32 sz)
{
u32 pgnum, loff, r32;
int i, len;
u32 *buf = tbuf;
pgnum = PSS_SMEM_PGNUM(ioc->ioc_regs.smem_pg0, soff);
loff = PSS_SMEM_PGOFF(soff);
/*
* Hold semaphore to serialize pll init and fwtrc.
*/
if (bfa_nw_ioc_sem_get(ioc->ioc_regs.ioc_init_sem_reg) == 0)
return 1;
writel(pgnum, ioc->ioc_regs.host_page_num_fn);
len = sz/sizeof(u32);
for (i = 0; i < len; i++) {
r32 = swab32(readl((loff) + (ioc->ioc_regs.smem_page_start)));
buf[i] = be32_to_cpu(r32);
loff += sizeof(u32);
/**
* handle page offset wrap around
*/
loff = PSS_SMEM_PGOFF(loff);
if (loff == 0) {
pgnum++;
writel(pgnum, ioc->ioc_regs.host_page_num_fn);
}
}
writel(PSS_SMEM_PGNUM(ioc->ioc_regs.smem_pg0, 0),
ioc->ioc_regs.host_page_num_fn);
/*
* release semaphore
*/
readl(ioc->ioc_regs.ioc_init_sem_reg);
writel(1, ioc->ioc_regs.ioc_init_sem_reg);
return 0;
}
/**
* Retrieve saved firmware trace from a prior IOC failure.
*/
int
bfa_nw_ioc_debug_fwtrc(struct bfa_ioc *ioc, void *trcdata, int *trclen)
{
u32 loff = BFI_IOC_TRC_OFF + BNA_DBG_FWTRC_LEN * ioc->port_id;
int tlen, status = 0;
tlen = *trclen;
if (tlen > BNA_DBG_FWTRC_LEN)
tlen = BNA_DBG_FWTRC_LEN;
status = bfa_nw_ioc_smem_read(ioc, trcdata, loff, tlen);
*trclen = tlen;
return status;
}
/**
* Save firmware trace if configured.
*/
static void
bfa_nw_ioc_debug_save_ftrc(struct bfa_ioc *ioc)
{
int tlen;
if (ioc->dbg_fwsave_once) {
ioc->dbg_fwsave_once = 0;
if (ioc->dbg_fwsave_len) {
tlen = ioc->dbg_fwsave_len;
bfa_nw_ioc_debug_fwtrc(ioc, ioc->dbg_fwsave, &tlen);
}
}
}
/**
* Retrieve saved firmware trace from a prior IOC failure.
*/
int
bfa_nw_ioc_debug_fwsave(struct bfa_ioc *ioc, void *trcdata, int *trclen)
{
int tlen;
if (ioc->dbg_fwsave_len == 0)
return BFA_STATUS_ENOFSAVE;
tlen = *trclen;
if (tlen > ioc->dbg_fwsave_len)
tlen = ioc->dbg_fwsave_len;
memcpy(trcdata, ioc->dbg_fwsave, tlen);
*trclen = tlen;
return BFA_STATUS_OK;
}
static void
bfa_ioc_fail_notify(struct bfa_ioc *ioc)
{
@ -1751,6 +1861,7 @@ bfa_ioc_fail_notify(struct bfa_ioc *ioc)
*/
ioc->cbfn->hbfail_cbfn(ioc->bfa);
bfa_ioc_event_notify(ioc, BFA_IOC_E_FAILED);
bfa_nw_ioc_debug_save_ftrc(ioc);
}
/**
@ -2058,6 +2169,16 @@ bfa_nw_ioc_disable(struct bfa_ioc *ioc)
bfa_fsm_send_event(ioc, IOC_E_DISABLE);
}
/**
* Initialize memory for saving firmware trace.
*/
void
bfa_nw_ioc_debug_memclaim(struct bfa_ioc *ioc, void *dbg_fwsave)
{
ioc->dbg_fwsave = dbg_fwsave;
ioc->dbg_fwsave_len = ioc->iocpf.auto_recover ? BNA_DBG_FWTRC_LEN : 0;
}
static u32
bfa_ioc_smem_pgnum(struct bfa_ioc *ioc, u32 fmaddr)
{

6
drivers/net/ethernet/brocade/bna/bfa_ioc.h
View File

@ -27,6 +27,8 @@
#define BFA_IOC_HWSEM_TOV 500 /* msecs */
#define BFA_IOC_HB_TOV 500 /* msecs */
#define BFA_IOC_POLL_TOV 200 /* msecs */
#define BNA_DBG_FWTRC_LEN (BFI_IOC_TRC_ENTS * BFI_IOC_TRC_ENT_SZ + \
BFI_IOC_TRC_HDR_SZ)
/**
* PCI device information required by IOC
@ -306,6 +308,7 @@ void bfa_nw_ioc_disable(struct bfa_ioc *ioc);
void bfa_nw_ioc_error_isr(struct bfa_ioc *ioc);
bool bfa_nw_ioc_is_disabled(struct bfa_ioc *ioc);
bool bfa_nw_ioc_is_operational(struct bfa_ioc *ioc);
void bfa_nw_ioc_get_attr(struct bfa_ioc *ioc, struct bfa_ioc_attr *ioc_attr);
void bfa_nw_ioc_notify_register(struct bfa_ioc *ioc,
struct bfa_ioc_notify *notify);
@ -317,6 +320,9 @@ void bfa_nw_ioc_fwver_get(struct bfa_ioc *ioc,
bool bfa_nw_ioc_fwver_cmp(struct bfa_ioc *ioc,
struct bfi_ioc_image_hdr *fwhdr);
mac_t bfa_nw_ioc_get_mac(struct bfa_ioc *ioc);
void bfa_nw_ioc_debug_memclaim(struct bfa_ioc *ioc, void *dbg_fwsave);
int bfa_nw_ioc_debug_fwtrc(struct bfa_ioc *ioc, void *trcdata, int *trclen);
int bfa_nw_ioc_debug_fwsave(struct bfa_ioc *ioc, void *trcdata, int *trclen);
/*
* Timeout APIs

2
drivers/net/ethernet/brocade/bna/bfi.h
View File

@ -257,6 +257,8 @@ struct bfi_ioc_getattr_reply {
*/
#define BFI_IOC_TRC_OFF (0x4b00)
#define BFI_IOC_TRC_ENTS 256
#define BFI_IOC_TRC_ENT_SZ 16
#define BFI_IOC_TRC_HDR_SZ 32
#define BFI_IOC_FW_SIGNATURE (0xbfadbfad)
#define BFI_IOC_MD5SUM_SZ 4

5
drivers/net/ethernet/brocade/bna/bna_enet.c
View File

@ -1727,6 +1727,7 @@ bna_ioceth_init(struct bna_ioceth *ioceth, struct bna *bna,
bfa_nw_ioc_mem_claim(&ioceth->ioc, kva, dma);
kva = res_info[BNA_RES_MEM_T_FWTRC].res_u.mem_info.mdl[0].kva;
bfa_nw_ioc_debug_memclaim(&ioceth->ioc, kva);
/**
* Attach common modules (Diag, SFP, CEE, Port) and claim respective
@ -1910,8 +1911,8 @@ bna_res_req(struct bna_res_info *res_info)
/* Virtual memory for retreiving fw_trc */
res_info[BNA_RES_MEM_T_FWTRC].res_type = BNA_RES_T_MEM;
res_info[BNA_RES_MEM_T_FWTRC].res_u.mem_info.mem_type = BNA_MEM_T_KVA;
res_info[BNA_RES_MEM_T_FWTRC].res_u.mem_info.num = 0;
res_info[BNA_RES_MEM_T_FWTRC].res_u.mem_info.len = 0;
res_info[BNA_RES_MEM_T_FWTRC].res_u.mem_info.num = 1;
res_info[BNA_RES_MEM_T_FWTRC].res_u.mem_info.len = BNA_DBG_FWTRC_LEN;
/* DMA memory for retreiving stats */
res_info[BNA_RES_MEM_T_STATS].res_type = BNA_RES_T_MEM;

15
drivers/net/ethernet/brocade/bna/bnad.c
View File

@ -44,6 +44,11 @@ static uint bnad_ioc_auto_recover = 1;
module_param(bnad_ioc_auto_recover, uint, 0444);
MODULE_PARM_DESC(bnad_ioc_auto_recover, "Enable / Disable auto recovery");
static uint bna_debugfs_enable = 1;
module_param(bna_debugfs_enable, uint, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(bna_debugfs_enable, "Enables debugfs feature, default=1,"
" Range[false:0|true:1]");
/*
* Global variables
*/
@ -3312,6 +3317,10 @@ bnad_pci_probe(struct pci_dev *pdev,
/* Set link to down state */
netif_carrier_off(netdev);
/* Setup the debugfs node for this bfad */
if (bna_debugfs_enable)
bnad_debugfs_init(bnad);
/* Get resource requirement form bna */
spin_lock_irqsave(&bnad->bna_lock, flags);
bna_res_req(&bnad->res_info[0]);
@ -3433,6 +3442,9 @@ disable_ioceth:
res_free:
bnad_res_free(bnad, &bnad->res_info[0], BNA_RES_T_MAX);
drv_uninit:
/* Remove the debugfs node for this bnad */
kfree(bnad->regdata);
bnad_debugfs_uninit(bnad);
bnad_uninit(bnad);
pci_uninit:
bnad_pci_uninit(pdev);
@ -3479,6 +3491,9 @@ bnad_pci_remove(struct pci_dev *pdev)
mutex_unlock(&bnad->conf_mutex);
bnad_remove_from_list(bnad);
bnad_lock_uninit(bnad);
/* Remove the debugfs node for this bnad */
kfree(bnad->regdata);
bnad_debugfs_uninit(bnad);
bnad_uninit(bnad);
free_netdev(netdev);
}

18
drivers/net/ethernet/brocade/bna/bnad.h
View File

@ -328,6 +328,20 @@ struct bnad {
char adapter_name[BNAD_NAME_LEN];
char port_name[BNAD_NAME_LEN];
char mbox_irq_name[BNAD_NAME_LEN];
/* debugfs specific data */
char *regdata;
u32 reglen;
struct dentry *bnad_dentry_files[5];
struct dentry *port_debugfs_root;
};
struct bnad_drvinfo {
struct bfa_ioc_attr ioc_attr;
struct bfa_cee_attr cee_attr;
struct bfa_flash_attr flash_attr;
u32 cee_status;
u32 flash_status;
};
/*
@ -368,6 +382,10 @@ extern void bnad_netdev_qstats_fill(struct bnad *bnad,
extern void bnad_netdev_hwstats_fill(struct bnad *bnad,
struct rtnl_link_stats64 *stats);
/* Debugfs */
void bnad_debugfs_init(struct bnad *bnad);
void bnad_debugfs_uninit(struct bnad *bnad);
/**
* MACROS
*/

623
drivers/net/ethernet/brocade/bna/bnad_debugfs.c Normal file
View File

@ -0,0 +1,623 @@
/*
* Linux network driver for Brocade Converged Network Adapter.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License (GPL) Version 2 as
* published by the Free Software Foundation
*
* 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.
*/
/*
* Copyright (c) 2005-2011 Brocade Communications Systems, Inc.
* All rights reserved
* www.brocade.com
*/
#include <linux/debugfs.h>
#include <linux/module.h>
#include "bnad.h"
/*
* BNA debufs interface
*
* To access the interface, debugfs file system should be mounted
* if not already mounted using:
* mount -t debugfs none /sys/kernel/debug
*
* BNA Hierarchy:
* - bna/pci_dev:<pci_name>
* where the pci_name corresponds to the one under /sys/bus/pci/drivers/bna
*
* Debugging service available per pci_dev:
* fwtrc: To collect current firmware trace.
* fwsave: To collect last saved fw trace as a result of firmware crash.
* regwr: To write one word to chip register
* regrd: To read one or more words from chip register.
*/
struct bnad_debug_info {
char *debug_buffer;
void *i_private;
int buffer_len;
};
static int
bnad_debugfs_open_fwtrc(struct inode *inode, struct file *file)
{
struct bnad *bnad = inode->i_private;
struct bnad_debug_info *fw_debug;
unsigned long flags;
int rc;
fw_debug = kzalloc(sizeof(struct bnad_debug_info), GFP_KERNEL);
if (!fw_debug)
return -ENOMEM;
fw_debug->buffer_len = BNA_DBG_FWTRC_LEN;
fw_debug->debug_buffer = kzalloc(fw_debug->buffer_len, GFP_KERNEL);
if (!fw_debug->debug_buffer) {
kfree(fw_debug);
fw_debug = NULL;
pr_warn("bna %s: Failed to allocate fwtrc buffer\n",
pci_name(bnad->pcidev));
return -ENOMEM;
}
spin_lock_irqsave(&bnad->bna_lock, flags);
rc = bfa_nw_ioc_debug_fwtrc(&bnad->bna.ioceth.ioc,
fw_debug->debug_buffer,
&fw_debug->buffer_len);
spin_unlock_irqrestore(&bnad->bna_lock, flags);
if (rc != BFA_STATUS_OK) {
kfree(fw_debug->debug_buffer);
fw_debug->debug_buffer = NULL;
kfree(fw_debug);
fw_debug = NULL;
pr_warn("bnad %s: Failed to collect fwtrc\n",
pci_name(bnad->pcidev));
return -ENOMEM;
}
file->private_data = fw_debug;
return 0;
}
static int
bnad_debugfs_open_fwsave(struct inode *inode, struct file *file)
{
struct bnad *bnad = inode->i_private;
struct bnad_debug_info *fw_debug;
unsigned long flags;
int rc;
fw_debug = kzalloc(sizeof(struct bnad_debug_info), GFP_KERNEL);
if (!fw_debug)
return -ENOMEM;
fw_debug->buffer_len = BNA_DBG_FWTRC_LEN;
fw_debug->debug_buffer = kzalloc(fw_debug->buffer_len, GFP_KERNEL);
if (!fw_debug->debug_buffer) {
kfree(fw_debug);
fw_debug = NULL;
pr_warn("bna %s: Failed to allocate fwsave buffer\n",
pci_name(bnad->pcidev));
return -ENOMEM;
}
spin_lock_irqsave(&bnad->bna_lock, flags);
rc = bfa_nw_ioc_debug_fwsave(&bnad->bna.ioceth.ioc,
fw_debug->debug_buffer,
&fw_debug->buffer_len);
spin_unlock_irqrestore(&bnad->bna_lock, flags);
if (rc != BFA_STATUS_OK && rc != BFA_STATUS_ENOFSAVE) {
kfree(fw_debug->debug_buffer);
fw_debug->debug_buffer = NULL;
kfree(fw_debug);
fw_debug = NULL;
pr_warn("bna %s: Failed to collect fwsave\n",
pci_name(bnad->pcidev));
return -ENOMEM;
}
file->private_data = fw_debug;
return 0;
}
static int
bnad_debugfs_open_reg(struct inode *inode, struct file *file)
{
struct bnad_debug_info *reg_debug;
reg_debug = kzalloc(sizeof(struct bnad_debug_info), GFP_KERNEL);
if (!reg_debug)
return -ENOMEM;
reg_debug->i_private = inode->i_private;
file->private_data = reg_debug;
return 0;
}
static int
bnad_get_debug_drvinfo(struct bnad *bnad, void *buffer, u32 len)
{
struct bnad_drvinfo *drvinfo = (struct bnad_drvinfo *) buffer;
struct bnad_iocmd_comp fcomp;
unsigned long flags = 0;
int ret = BFA_STATUS_FAILED;
/* Get IOC info */
spin_lock_irqsave(&bnad->bna_lock, flags);
bfa_nw_ioc_get_attr(&bnad->bna.ioceth.ioc, &drvinfo->ioc_attr);
spin_unlock_irqrestore(&bnad->bna_lock, flags);
/* Retrieve CEE related info */
fcomp.bnad = bnad;
fcomp.comp_status = 0;
init_completion(&fcomp.comp);
spin_lock_irqsave(&bnad->bna_lock, flags);
ret = bfa_nw_cee_get_attr(&bnad->bna.cee, &drvinfo->cee_attr,
bnad_cb_completion, &fcomp);
if (ret != BFA_STATUS_OK) {
spin_unlock_irqrestore(&bnad->bna_lock, flags);
goto out;
}
spin_unlock_irqrestore(&bnad->bna_lock, flags);
wait_for_completion(&fcomp.comp);
drvinfo->cee_status = fcomp.comp_status;
/* Retrieve flash partition info */
fcomp.comp_status = 0;
init_completion(&fcomp.comp);
spin_lock_irqsave(&bnad->bna_lock, flags);
ret = bfa_nw_flash_get_attr(&bnad->bna.flash, &drvinfo->flash_attr,
bnad_cb_completion, &fcomp);
if (ret != BFA_STATUS_OK) {
spin_unlock_irqrestore(&bnad->bna_lock, flags);
goto out;
}
spin_unlock_irqrestore(&bnad->bna_lock, flags);
wait_for_completion(&fcomp.comp);
drvinfo->flash_status = fcomp.comp_status;
out:
return ret;
}
static int
bnad_debugfs_open_drvinfo(struct inode *inode, struct file *file)
{
struct bnad *bnad = inode->i_private;
struct bnad_debug_info *drv_info;
int rc;
drv_info = kzalloc(sizeof(struct bnad_debug_info), GFP_KERNEL);
if (!drv_info)
return -ENOMEM;
drv_info->buffer_len = sizeof(struct bnad_drvinfo);
drv_info->debug_buffer = kzalloc(drv_info->buffer_len, GFP_KERNEL);
if (!drv_info->debug_buffer) {
kfree(drv_info);
drv_info = NULL;
pr_warn("bna %s: Failed to allocate drv info buffer\n",
pci_name(bnad->pcidev));
return -ENOMEM;
}
mutex_lock(&bnad->conf_mutex);
rc = bnad_get_debug_drvinfo(bnad, drv_info->debug_buffer,
drv_info->buffer_len);
mutex_unlock(&bnad->conf_mutex);
if (rc != BFA_STATUS_OK) {
kfree(drv_info->debug_buffer);
drv_info->debug_buffer = NULL;
kfree(drv_info);
drv_info = NULL;
pr_warn("bna %s: Failed to collect drvinfo\n",
pci_name(bnad->pcidev));
return -ENOMEM;
}
file->private_data = drv_info;
return 0;
}
/* Changes the current file position */
static loff_t
bnad_debugfs_lseek(struct file *file, loff_t offset, int orig)
{
loff_t pos = file->f_pos;
struct bnad_debug_info *debug = file->private_data;
if (!debug)
return -EINVAL;
switch (orig) {
case 0:
file->f_pos = offset;
break;
case 1:
file->f_pos += offset;
break;
case 2:
file->f_pos = debug->buffer_len - offset;
break;
default:
return -EINVAL;
}
if (file->f_pos < 0 || file->f_pos > debug->buffer_len) {
file->f_pos = pos;
return -EINVAL;
}
return file->f_pos;
}
static ssize_t
bnad_debugfs_read(struct file *file, char __user *buf,
size_t nbytes, loff_t *pos)
{
struct bnad_debug_info *debug = file->private_data;
if (!debug || !debug->debug_buffer)
return 0;
return simple_read_from_buffer(buf, nbytes, pos,
debug->debug_buffer, debug->buffer_len);
}
#define BFA_REG_CT_ADDRSZ (0x40000)
#define BFA_REG_CB_ADDRSZ (0x20000)
#define BFA_REG_ADDRSZ(__ioc) \
((u32)(bfa_asic_id_ctc(bfa_ioc_devid(__ioc)) ? \
BFA_REG_CT_ADDRSZ : BFA_REG_CB_ADDRSZ))
#define BFA_REG_ADDRMSK(__ioc) (BFA_REG_ADDRSZ(__ioc) - 1)
/*
* Function to check if the register offset passed is valid.
*/
static int
bna_reg_offset_check(struct bfa_ioc *ioc, u32 offset, u32 len)
{
u8 area;
/* check [16:15] */
area = (offset >> 15) & 0x7;
if (area == 0) {
/* PCIe core register */
if ((offset + (len<<2)) > 0x8000) /* 8k dwords or 32KB */
return BFA_STATUS_EINVAL;
} else if (area == 0x1) {
/* CB 32 KB memory page */
if ((offset + (len<<2)) > 0x10000) /* 8k dwords or 32KB */
return BFA_STATUS_EINVAL;
} else {
/* CB register space 64KB */
if ((offset + (len<<2)) > BFA_REG_ADDRMSK(ioc))
return BFA_STATUS_EINVAL;
}
return BFA_STATUS_OK;
}
static ssize_t
bnad_debugfs_read_regrd(struct file *file, char __user *buf,
size_t nbytes, loff_t *pos)
{
struct bnad_debug_info *regrd_debug = file->private_data;
struct bnad *bnad = (struct bnad *)regrd_debug->i_private;
ssize_t rc;
if (!bnad->regdata)
return 0;
rc = simple_read_from_buffer(buf, nbytes, pos,
bnad->regdata, bnad->reglen);
if ((*pos + nbytes) >= bnad->reglen) {
kfree(bnad->regdata);
bnad->regdata = NULL;
bnad->reglen = 0;
}
return rc;
}
static ssize_t
bnad_debugfs_write_regrd(struct file *file, const char __user *buf,
size_t nbytes, loff_t *ppos)
{
struct bnad_debug_info *regrd_debug = file->private_data;
struct bnad *bnad = (struct bnad *)regrd_debug->i_private;
struct bfa_ioc *ioc = &bnad->bna.ioceth.ioc;
int addr, len, rc, i;
u32 *regbuf;
void __iomem *rb, *reg_addr;
unsigned long flags;
void *kern_buf;
/* Allocate memory to store the user space buf */
kern_buf = kzalloc(nbytes, GFP_KERNEL);
if (!kern_buf) {
pr_warn("bna %s: Failed to allocate user buffer\n",
pci_name(bnad->pcidev));
return -ENOMEM;
}
if (copy_from_user(kern_buf, (void __user *)buf, nbytes)) {
kfree(kern_buf);
return -ENOMEM;
}
rc = sscanf(kern_buf, "%x:%x", &addr, &len);
if (rc < 2) {
pr_warn("bna %s: Failed to read user buffer\n",
pci_name(bnad->pcidev));
kfree(kern_buf);
return -EINVAL;
}
kfree(kern_buf);
kfree(bnad->regdata);
bnad->regdata = NULL;
bnad->reglen = 0;
bnad->regdata = kzalloc(len << 2, GFP_KERNEL);
if (!bnad->regdata) {
pr_warn("bna %s: Failed to allocate regrd buffer\n",
pci_name(bnad->pcidev));
return -ENOMEM;
}
bnad->reglen = len << 2;
rb = bfa_ioc_bar0(ioc);
addr &= BFA_REG_ADDRMSK(ioc);
/* offset and len sanity check */
rc = bna_reg_offset_check(ioc, addr, len);
if (rc) {
pr_warn("bna %s: Failed reg offset check\n",
pci_name(bnad->pcidev));
kfree(bnad->regdata);
bnad->regdata = NULL;
bnad->reglen = 0;
return -EINVAL;
}
reg_addr = rb + addr;
regbuf = (u32 *)bnad->regdata;
spin_lock_irqsave(&bnad->bna_lock, flags);
for (i = 0; i < len; i++) {
*regbuf = readl(reg_addr);
regbuf++;
reg_addr += sizeof(u32);
}
spin_unlock_irqrestore(&bnad->bna_lock, flags);
return nbytes;
}
static ssize_t
bnad_debugfs_write_regwr(struct file *file, const char __user *buf,
size_t nbytes, loff_t *ppos)
{
struct bnad_debug_info *debug = file->private_data;
struct bnad *bnad = (struct bnad *)debug->i_private;
struct bfa_ioc *ioc = &bnad->bna.ioceth.ioc;
int addr, val, rc;
void __iomem *reg_addr;
unsigned long flags;
void *kern_buf;
/* Allocate memory to store the user space buf */
kern_buf = kzalloc(nbytes, GFP_KERNEL);
if (!kern_buf) {
pr_warn("bna %s: Failed to allocate user buffer\n",
pci_name(bnad->pcidev));
return -ENOMEM;
}
if (copy_from_user(kern_buf, (void __user *)buf, nbytes)) {
kfree(kern_buf);
return -ENOMEM;
}
rc = sscanf(kern_buf, "%x:%x", &addr, &val);
if (rc < 2) {
pr_warn("bna %s: Failed to read user buffer\n",
pci_name(bnad->pcidev));
kfree(kern_buf);
return -EINVAL;
}
kfree(kern_buf);
addr &= BFA_REG_ADDRMSK(ioc); /* offset only 17 bit and word align */
/* offset and len sanity check */
rc = bna_reg_offset_check(ioc, addr, 1);
if (rc) {
pr_warn("bna %s: Failed reg offset check\n",
pci_name(bnad->pcidev));
return -EINVAL;
}
reg_addr = (bfa_ioc_bar0(ioc)) + addr;
spin_lock_irqsave(&bnad->bna_lock, flags);
writel(val, reg_addr);
spin_unlock_irqrestore(&bnad->bna_lock, flags);
return nbytes;
}
static int
bnad_debugfs_release(struct inode *inode, struct file *file)
{
struct bnad_debug_info *debug = file->private_data;
if (!debug)
return 0;
file->private_data = NULL;
kfree(debug);
return 0;
}
static int
bnad_debugfs_buffer_release(struct inode *inode, struct file *file)
{
struct bnad_debug_info *debug = file->private_data;
if (!debug)
return 0;
kfree(debug->debug_buffer);
file->private_data = NULL;
kfree(debug);
debug = NULL;
return 0;
}
static const struct file_operations bnad_debugfs_op_fwtrc = {
.owner = THIS_MODULE,
.open = bnad_debugfs_open_fwtrc,
.llseek = bnad_debugfs_lseek,
.read = bnad_debugfs_read,
.release = bnad_debugfs_buffer_release,
};
static const struct file_operations bnad_debugfs_op_fwsave = {
.owner = THIS_MODULE,
.open = bnad_debugfs_open_fwsave,
.llseek = bnad_debugfs_lseek,
.read = bnad_debugfs_read,
.release = bnad_debugfs_buffer_release,
};
static const struct file_operations bnad_debugfs_op_regrd = {
.owner = THIS_MODULE,
.open = bnad_debugfs_open_reg,
.llseek = bnad_debugfs_lseek,
.read = bnad_debugfs_read_regrd,
.write = bnad_debugfs_write_regrd,
.release = bnad_debugfs_release,
};
static const struct file_operations bnad_debugfs_op_regwr = {
.owner = THIS_MODULE,
.open = bnad_debugfs_open_reg,
.llseek = bnad_debugfs_lseek,
.write = bnad_debugfs_write_regwr,
.release = bnad_debugfs_release,
};
static const struct file_operations bnad_debugfs_op_drvinfo = {
.owner = THIS_MODULE,
.open = bnad_debugfs_open_drvinfo,
.llseek = bnad_debugfs_lseek,
.read = bnad_debugfs_read,
.release = bnad_debugfs_buffer_release,
};
struct bnad_debugfs_entry {
const char *name;
mode_t mode;
const struct file_operations *fops;
};
static const struct bnad_debugfs_entry bnad_debugfs_files[] = {
{ "fwtrc", S_IFREG|S_IRUGO, &bnad_debugfs_op_fwtrc, },
{ "fwsave", S_IFREG|S_IRUGO, &bnad_debugfs_op_fwsave, },
{ "regrd", S_IFREG|S_IRUGO|S_IWUSR, &bnad_debugfs_op_regrd, },
{ "regwr", S_IFREG|S_IWUSR, &bnad_debugfs_op_regwr, },
{ "drvinfo", S_IFREG|S_IRUGO, &bnad_debugfs_op_drvinfo, },
};
static struct dentry *bna_debugfs_root;
static atomic_t bna_debugfs_port_count;
/* Initialize debugfs interface for BNA */
void
bnad_debugfs_init(struct bnad *bnad)
{
const struct bnad_debugfs_entry *file;
char name[64];
int i;
/* Setup the BNA debugfs root directory*/
if (!bna_debugfs_root) {
bna_debugfs_root = debugfs_create_dir("bna", NULL);
atomic_set(&bna_debugfs_port_count, 0);
if (!bna_debugfs_root) {
pr_warn("BNA: debugfs root dir creation failed\n");
return;
}
}
/* Setup the pci_dev debugfs directory for the port */
snprintf(name, sizeof(name), "pci_dev:%s", pci_name(bnad->pcidev));
if (!bnad->port_debugfs_root) {
bnad->port_debugfs_root =
debugfs_create_dir(name, bna_debugfs_root);
if (!bnad->port_debugfs_root) {
pr_warn("bna pci_dev %s: root dir creation failed\n",
pci_name(bnad->pcidev));
return;
}
atomic_inc(&bna_debugfs_port_count);
for (i = 0; i < ARRAY_SIZE(bnad_debugfs_files); i++) {
file = &bnad_debugfs_files[i];
bnad->bnad_dentry_files[i] =
debugfs_create_file(file->name,
file->mode,
bnad->port_debugfs_root,
bnad,
file->fops);
if (!bnad->bnad_dentry_files[i]) {
pr_warn(
"BNA pci_dev:%s: create %s entry failed\n",
pci_name(bnad->pcidev), file->name);
return;
}
}
}
}
/* Uninitialize debugfs interface for BNA */
void
bnad_debugfs_uninit(struct bnad *bnad)
{
int i;
for (i = 0; i < ARRAY_SIZE(bnad_debugfs_files); i++) {
if (bnad->bnad_dentry_files[i]) {
debugfs_remove(bnad->bnad_dentry_files[i]);
bnad->bnad_dentry_files[i] = NULL;
}
}
/* Remove the pci_dev debugfs directory for the port */
if (bnad->port_debugfs_root) {
debugfs_remove(bnad->port_debugfs_root);
bnad->port_debugfs_root = NULL;
atomic_dec(&bna_debugfs_port_count);
}
/* Remove the BNA debugfs root directory */
if (atomic_read(&bna_debugfs_port_count) == 0) {
debugfs_remove(bna_debugfs_root);
bna_debugfs_root = NULL;
}
}