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Commit 7afc5dbd authored by Krishna Gudipati's avatar Krishna Gudipati Committed by David S. Miller
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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: default avatarKrishna Gudipati <kgudipat@brocade.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 72a9730b

drivers/net/ethernet/brocade/bna/Makefile

+1 −1
Original line number Original line Diff line number Diff line
@@ -5,7 +5,7 @@ 




obj-$(CONFIG_BNA) += bna.o

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 += bfa_msgq.o bfa_ioc.o bfa_ioc_ct.o bfa_cee.o

bna-objs += cna_fwimg.o

bna-objs += cna_fwimg.o

drivers/net/ethernet/brocade/bna/bfa_cee.c

+35 −0
Original line number Original line Diff line number Diff line
@@ -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());

		(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()

 * bfa_cee_isrs()

 *

 *

drivers/net/ethernet/brocade/bna/bfa_cee.h

+3 −1
Original line number Original line Diff line number Diff line
@@ -59,5 +59,7 @@ u32 bfa_nw_cee_meminfo(void); 
void bfa_nw_cee_mem_claim(struct bfa_cee *cee, u8 *dma_kva,

void bfa_nw_cee_mem_claim(struct bfa_cee *cee, u8 *dma_kva,

	u64 dma_pa);

	u64 dma_pa);

void bfa_nw_cee_attach(struct bfa_cee *cee, struct bfa_ioc *ioc, void *dev);

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__ */
 
#endif /* __BFA_CEE_H__ */

drivers/net/ethernet/brocade/bna/bfa_ioc.c

+121 −0
Original line number Original line Diff line number Diff line
@@ -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_event_notify(struct bfa_ioc *, enum bfa_ioc_event);

static void bfa_ioc_disable_comp(struct bfa_ioc *ioc);

static void bfa_ioc_disable_comp(struct bfa_ioc *ioc);

static void bfa_ioc_lpu_stop(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_fail_notify(struct bfa_ioc *ioc);

static void bfa_ioc_pf_enabled(struct bfa_ioc *ioc);

static void bfa_ioc_pf_enabled(struct bfa_ioc *ioc);

static void bfa_ioc_pf_disabled(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

static void

bfa_iocpf_sm_initfail_sync_entry(struct bfa_iocpf *iocpf)

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);

	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);

		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

static void

bfa_ioc_fail_notify(struct bfa_ioc *ioc)

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);

	ioc->cbfn->hbfail_cbfn(ioc->bfa);

	bfa_ioc_event_notify(ioc, BFA_IOC_E_FAILED);

	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);

	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

static u32

bfa_ioc_smem_pgnum(struct bfa_ioc *ioc, u32 fmaddr)

bfa_ioc_smem_pgnum(struct bfa_ioc *ioc, u32 fmaddr)

{

{

drivers/net/ethernet/brocade/bna/bfa_ioc.h

+6 −0
Original line number Original line Diff line number Diff line
@@ -27,6 +27,8 @@ 
#define BFA_IOC_HWSEM_TOV	500	/* msecs */

#define BFA_IOC_HWSEM_TOV	500	/* msecs */

#define BFA_IOC_HB_TOV		500	/* msecs */

#define BFA_IOC_HB_TOV		500	/* msecs */

#define BFA_IOC_POLL_TOV	200	/* 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

 * 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);

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_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_get_attr(struct bfa_ioc *ioc, struct bfa_ioc_attr *ioc_attr);

void bfa_nw_ioc_notify_register(struct bfa_ioc *ioc,

void bfa_nw_ioc_notify_register(struct bfa_ioc *ioc,

	struct bfa_ioc_notify *notify);

	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,

bool bfa_nw_ioc_fwver_cmp(struct bfa_ioc *ioc,

			struct bfi_ioc_image_hdr *fwhdr);

			struct bfi_ioc_image_hdr *fwhdr);

mac_t bfa_nw_ioc_get_mac(struct bfa_ioc *ioc);

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

 * Timeout APIs