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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
David S. Miller
parent
72a9730b3f
commit
7afc5dbde0
@ -5,7 +5,7 @@
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obj-$(CONFIG_BNA) += bna.o
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bna-objs := bnad.o bnad_ethtool.o bna_enet.o bna_tx_rx.o
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bna-objs := bnad.o bnad_ethtool.o bnad_debugfs.o bna_enet.o bna_tx_rx.o
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bna-objs += bfa_msgq.o bfa_ioc.o bfa_ioc_ct.o bfa_cee.o
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bna-objs += cna_fwimg.o
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@ -184,6 +184,41 @@ bfa_nw_cee_mem_claim(struct bfa_cee *cee, u8 *dma_kva, u64 dma_pa)
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(dma_kva + bfa_cee_attr_meminfo());
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}
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/**
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* bfa_cee_get_attr()
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*
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* @brief Send the request to the f/w to fetch CEE attributes.
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*
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* @param[in] Pointer to the CEE module data structure.
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*
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* @return Status
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*/
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enum bfa_status
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bfa_nw_cee_get_attr(struct bfa_cee *cee, struct bfa_cee_attr *attr,
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bfa_cee_get_attr_cbfn_t cbfn, void *cbarg)
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{
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struct bfi_cee_get_req *cmd;
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BUG_ON(!((cee != NULL) && (cee->ioc != NULL)));
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if (!bfa_nw_ioc_is_operational(cee->ioc))
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return BFA_STATUS_IOC_FAILURE;
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if (cee->get_attr_pending == true)
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return BFA_STATUS_DEVBUSY;
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cee->get_attr_pending = true;
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cmd = (struct bfi_cee_get_req *) cee->get_cfg_mb.msg;
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cee->attr = attr;
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cee->cbfn.get_attr_cbfn = cbfn;
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cee->cbfn.get_attr_cbarg = cbarg;
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bfi_h2i_set(cmd->mh, BFI_MC_CEE, BFI_CEE_H2I_GET_CFG_REQ,
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bfa_ioc_portid(cee->ioc));
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bfa_dma_be_addr_set(cmd->dma_addr, cee->attr_dma.pa);
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bfa_nw_ioc_mbox_queue(cee->ioc, &cee->get_cfg_mb, NULL, NULL);
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return BFA_STATUS_OK;
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}
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/**
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* bfa_cee_isrs()
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*
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@ -59,5 +59,7 @@ u32 bfa_nw_cee_meminfo(void);
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void bfa_nw_cee_mem_claim(struct bfa_cee *cee, u8 *dma_kva,
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u64 dma_pa);
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void bfa_nw_cee_attach(struct bfa_cee *cee, struct bfa_ioc *ioc, void *dev);
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enum bfa_status bfa_nw_cee_get_attr(struct bfa_cee *cee,
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struct bfa_cee_attr *attr,
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bfa_cee_get_attr_cbfn_t cbfn, void *cbarg);
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#endif /* __BFA_CEE_H__ */
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@ -74,6 +74,7 @@ static void bfa_ioc_check_attr_wwns(struct bfa_ioc *ioc);
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static void bfa_ioc_event_notify(struct bfa_ioc *, enum bfa_ioc_event);
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static void bfa_ioc_disable_comp(struct bfa_ioc *ioc);
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static void bfa_ioc_lpu_stop(struct bfa_ioc *ioc);
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static void bfa_nw_ioc_debug_save_ftrc(struct bfa_ioc *ioc);
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static void bfa_ioc_fail_notify(struct bfa_ioc *ioc);
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static void bfa_ioc_pf_enabled(struct bfa_ioc *ioc);
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static void bfa_ioc_pf_disabled(struct bfa_ioc *ioc);
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@ -997,6 +998,7 @@ bfa_iocpf_sm_disabled(struct bfa_iocpf *iocpf, enum iocpf_event event)
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static void
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bfa_iocpf_sm_initfail_sync_entry(struct bfa_iocpf *iocpf)
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{
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bfa_nw_ioc_debug_save_ftrc(iocpf->ioc);
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bfa_ioc_hw_sem_get(iocpf->ioc);
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}
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@ -1743,6 +1745,114 @@ bfa_ioc_mbox_flush(struct bfa_ioc *ioc)
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bfa_q_deq(&mod->cmd_q, &cmd);
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}
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/**
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* Read data from SMEM to host through PCI memmap
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*
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* @param[in] ioc memory for IOC
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* @param[in] tbuf app memory to store data from smem
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* @param[in] soff smem offset
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* @param[in] sz size of smem in bytes
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*/
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static int
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bfa_nw_ioc_smem_read(struct bfa_ioc *ioc, void *tbuf, u32 soff, u32 sz)
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{
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u32 pgnum, loff, r32;
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int i, len;
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u32 *buf = tbuf;
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pgnum = PSS_SMEM_PGNUM(ioc->ioc_regs.smem_pg0, soff);
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loff = PSS_SMEM_PGOFF(soff);
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/*
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* Hold semaphore to serialize pll init and fwtrc.
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*/
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if (bfa_nw_ioc_sem_get(ioc->ioc_regs.ioc_init_sem_reg) == 0)
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return 1;
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writel(pgnum, ioc->ioc_regs.host_page_num_fn);
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len = sz/sizeof(u32);
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for (i = 0; i < len; i++) {
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r32 = swab32(readl((loff) + (ioc->ioc_regs.smem_page_start)));
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buf[i] = be32_to_cpu(r32);
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loff += sizeof(u32);
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/**
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* handle page offset wrap around
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*/
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loff = PSS_SMEM_PGOFF(loff);
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if (loff == 0) {
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pgnum++;
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writel(pgnum, ioc->ioc_regs.host_page_num_fn);
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}
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}
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writel(PSS_SMEM_PGNUM(ioc->ioc_regs.smem_pg0, 0),
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ioc->ioc_regs.host_page_num_fn);
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/*
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* release semaphore
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*/
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readl(ioc->ioc_regs.ioc_init_sem_reg);
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writel(1, ioc->ioc_regs.ioc_init_sem_reg);
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return 0;
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}
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/**
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* Retrieve saved firmware trace from a prior IOC failure.
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*/
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int
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bfa_nw_ioc_debug_fwtrc(struct bfa_ioc *ioc, void *trcdata, int *trclen)
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{
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u32 loff = BFI_IOC_TRC_OFF + BNA_DBG_FWTRC_LEN * ioc->port_id;
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int tlen, status = 0;
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tlen = *trclen;
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if (tlen > BNA_DBG_FWTRC_LEN)
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tlen = BNA_DBG_FWTRC_LEN;
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status = bfa_nw_ioc_smem_read(ioc, trcdata, loff, tlen);
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*trclen = tlen;
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return status;
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}
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/**
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* Save firmware trace if configured.
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*/
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static void
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bfa_nw_ioc_debug_save_ftrc(struct bfa_ioc *ioc)
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{
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int tlen;
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if (ioc->dbg_fwsave_once) {
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ioc->dbg_fwsave_once = 0;
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if (ioc->dbg_fwsave_len) {
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tlen = ioc->dbg_fwsave_len;
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bfa_nw_ioc_debug_fwtrc(ioc, ioc->dbg_fwsave, &tlen);
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}
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}
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}
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/**
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* Retrieve saved firmware trace from a prior IOC failure.
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*/
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int
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bfa_nw_ioc_debug_fwsave(struct bfa_ioc *ioc, void *trcdata, int *trclen)
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{
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int tlen;
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if (ioc->dbg_fwsave_len == 0)
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return BFA_STATUS_ENOFSAVE;
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tlen = *trclen;
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if (tlen > ioc->dbg_fwsave_len)
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tlen = ioc->dbg_fwsave_len;
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memcpy(trcdata, ioc->dbg_fwsave, tlen);
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*trclen = tlen;
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return BFA_STATUS_OK;
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}
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static void
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bfa_ioc_fail_notify(struct bfa_ioc *ioc)
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{
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@ -1751,6 +1861,7 @@ bfa_ioc_fail_notify(struct bfa_ioc *ioc)
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*/
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ioc->cbfn->hbfail_cbfn(ioc->bfa);
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bfa_ioc_event_notify(ioc, BFA_IOC_E_FAILED);
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bfa_nw_ioc_debug_save_ftrc(ioc);
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}
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/**
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@ -2058,6 +2169,16 @@ bfa_nw_ioc_disable(struct bfa_ioc *ioc)
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bfa_fsm_send_event(ioc, IOC_E_DISABLE);
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}
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/**
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* Initialize memory for saving firmware trace.
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*/
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void
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bfa_nw_ioc_debug_memclaim(struct bfa_ioc *ioc, void *dbg_fwsave)
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{
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ioc->dbg_fwsave = dbg_fwsave;
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ioc->dbg_fwsave_len = ioc->iocpf.auto_recover ? BNA_DBG_FWTRC_LEN : 0;
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}
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static u32
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bfa_ioc_smem_pgnum(struct bfa_ioc *ioc, u32 fmaddr)
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{
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@ -27,6 +27,8 @@
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#define BFA_IOC_HWSEM_TOV 500 /* msecs */
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#define BFA_IOC_HB_TOV 500 /* msecs */
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#define BFA_IOC_POLL_TOV 200 /* msecs */
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#define BNA_DBG_FWTRC_LEN (BFI_IOC_TRC_ENTS * BFI_IOC_TRC_ENT_SZ + \
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BFI_IOC_TRC_HDR_SZ)
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/**
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* PCI device information required by IOC
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@ -306,6 +308,7 @@ void bfa_nw_ioc_disable(struct bfa_ioc *ioc);
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void bfa_nw_ioc_error_isr(struct bfa_ioc *ioc);
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bool bfa_nw_ioc_is_disabled(struct bfa_ioc *ioc);
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bool bfa_nw_ioc_is_operational(struct bfa_ioc *ioc);
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void bfa_nw_ioc_get_attr(struct bfa_ioc *ioc, struct bfa_ioc_attr *ioc_attr);
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void bfa_nw_ioc_notify_register(struct bfa_ioc *ioc,
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struct bfa_ioc_notify *notify);
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@ -317,6 +320,9 @@ void bfa_nw_ioc_fwver_get(struct bfa_ioc *ioc,
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bool bfa_nw_ioc_fwver_cmp(struct bfa_ioc *ioc,
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struct bfi_ioc_image_hdr *fwhdr);
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mac_t bfa_nw_ioc_get_mac(struct bfa_ioc *ioc);
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void bfa_nw_ioc_debug_memclaim(struct bfa_ioc *ioc, void *dbg_fwsave);
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int bfa_nw_ioc_debug_fwtrc(struct bfa_ioc *ioc, void *trcdata, int *trclen);
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int bfa_nw_ioc_debug_fwsave(struct bfa_ioc *ioc, void *trcdata, int *trclen);
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/*
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* Timeout APIs
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@ -257,6 +257,8 @@ struct bfi_ioc_getattr_reply {
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*/
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#define BFI_IOC_TRC_OFF (0x4b00)
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#define BFI_IOC_TRC_ENTS 256
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#define BFI_IOC_TRC_ENT_SZ 16
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#define BFI_IOC_TRC_HDR_SZ 32
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#define BFI_IOC_FW_SIGNATURE (0xbfadbfad)
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#define BFI_IOC_MD5SUM_SZ 4
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@ -1727,6 +1727,7 @@ bna_ioceth_init(struct bna_ioceth *ioceth, struct bna *bna,
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bfa_nw_ioc_mem_claim(&ioceth->ioc, kva, dma);
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kva = res_info[BNA_RES_MEM_T_FWTRC].res_u.mem_info.mdl[0].kva;
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bfa_nw_ioc_debug_memclaim(&ioceth->ioc, kva);
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/**
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* Attach common modules (Diag, SFP, CEE, Port) and claim respective
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@ -1910,8 +1911,8 @@ bna_res_req(struct bna_res_info *res_info)
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/* Virtual memory for retreiving fw_trc */
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res_info[BNA_RES_MEM_T_FWTRC].res_type = BNA_RES_T_MEM;
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res_info[BNA_RES_MEM_T_FWTRC].res_u.mem_info.mem_type = BNA_MEM_T_KVA;
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res_info[BNA_RES_MEM_T_FWTRC].res_u.mem_info.num = 0;
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res_info[BNA_RES_MEM_T_FWTRC].res_u.mem_info.len = 0;
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res_info[BNA_RES_MEM_T_FWTRC].res_u.mem_info.num = 1;
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res_info[BNA_RES_MEM_T_FWTRC].res_u.mem_info.len = BNA_DBG_FWTRC_LEN;
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/* DMA memory for retreiving stats */
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res_info[BNA_RES_MEM_T_STATS].res_type = BNA_RES_T_MEM;
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@ -44,6 +44,11 @@ static uint bnad_ioc_auto_recover = 1;
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module_param(bnad_ioc_auto_recover, uint, 0444);
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MODULE_PARM_DESC(bnad_ioc_auto_recover, "Enable / Disable auto recovery");
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static uint bna_debugfs_enable = 1;
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module_param(bna_debugfs_enable, uint, S_IRUGO | S_IWUSR);
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MODULE_PARM_DESC(bna_debugfs_enable, "Enables debugfs feature, default=1,"
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" Range[false:0|true:1]");
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/*
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* Global variables
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*/
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@ -3312,6 +3317,10 @@ bnad_pci_probe(struct pci_dev *pdev,
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/* Set link to down state */
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netif_carrier_off(netdev);
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/* Setup the debugfs node for this bfad */
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if (bna_debugfs_enable)
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bnad_debugfs_init(bnad);
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/* Get resource requirement form bna */
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spin_lock_irqsave(&bnad->bna_lock, flags);
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bna_res_req(&bnad->res_info[0]);
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@ -3433,6 +3442,9 @@ disable_ioceth:
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res_free:
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bnad_res_free(bnad, &bnad->res_info[0], BNA_RES_T_MAX);
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drv_uninit:
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/* Remove the debugfs node for this bnad */
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kfree(bnad->regdata);
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bnad_debugfs_uninit(bnad);
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bnad_uninit(bnad);
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pci_uninit:
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bnad_pci_uninit(pdev);
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@ -3479,6 +3491,9 @@ bnad_pci_remove(struct pci_dev *pdev)
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mutex_unlock(&bnad->conf_mutex);
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bnad_remove_from_list(bnad);
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bnad_lock_uninit(bnad);
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/* Remove the debugfs node for this bnad */
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kfree(bnad->regdata);
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bnad_debugfs_uninit(bnad);
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bnad_uninit(bnad);
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free_netdev(netdev);
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}
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@ -328,6 +328,20 @@ struct bnad {
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char adapter_name[BNAD_NAME_LEN];
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char port_name[BNAD_NAME_LEN];
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char mbox_irq_name[BNAD_NAME_LEN];
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/* debugfs specific data */
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char *regdata;
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u32 reglen;
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struct dentry *bnad_dentry_files[5];
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struct dentry *port_debugfs_root;
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};
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struct bnad_drvinfo {
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struct bfa_ioc_attr ioc_attr;
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struct bfa_cee_attr cee_attr;
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struct bfa_flash_attr flash_attr;
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u32 cee_status;
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u32 flash_status;
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};
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/*
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@ -368,6 +382,10 @@ extern void bnad_netdev_qstats_fill(struct bnad *bnad,
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extern void bnad_netdev_hwstats_fill(struct bnad *bnad,
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struct rtnl_link_stats64 *stats);
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/* Debugfs */
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void bnad_debugfs_init(struct bnad *bnad);
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void bnad_debugfs_uninit(struct bnad *bnad);
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/**
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* MACROS
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*/
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623
drivers/net/ethernet/brocade/bna/bnad_debugfs.c
Normal file
623
drivers/net/ethernet/brocade/bna/bnad_debugfs.c
Normal file
@ -0,0 +1,623 @@
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/*
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* Linux network driver for Brocade Converged Network Adapter.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License (GPL) Version 2 as
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* published by the Free Software Foundation
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*/
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/*
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* Copyright (c) 2005-2011 Brocade Communications Systems, Inc.
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* All rights reserved
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* www.brocade.com
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*/
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#include <linux/debugfs.h>
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#include <linux/module.h>
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#include "bnad.h"
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/*
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* BNA debufs interface
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*
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* To access the interface, debugfs file system should be mounted
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* if not already mounted using:
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* mount -t debugfs none /sys/kernel/debug
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*
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* BNA Hierarchy:
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* - 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;
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user