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Date: Tue, 18 Jun 2024 20:37:33 +0000
From: "Karan Tilak Kumar (kartilak)" <kartilak@...co.com>
To: John Garry <john.g.garry@...cle.com>,
"Sesidhar Baddela (sebaddel)"
<sebaddel@...co.com>
CC: "Arulprabhu Ponnusamy (arulponn)" <arulponn@...co.com>,
"Dhanraj Jhawar
(djhawar)" <djhawar@...co.com>,
"Gian Carlo Boffa (gcboffa)"
<gcboffa@...co.com>,
"Masa Kai (mkai2)" <mkai2@...co.com>,
"Satish Kharat
(satishkh)" <satishkh@...co.com>,
"jejb@...ux.ibm.com" <jejb@...ux.ibm.com>,
"martin.petersen@...cle.com" <martin.petersen@...cle.com>,
"linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 07/14] scsi: fnic: Add and integrate support for FIP
On Thursday, June 13, 2024 8:47 AM, John Garry <john.g.garry@...cle.com> wrote:
>
> On 10/06/2024 22:50, Karan Tilak Kumar wrote:
> > Add and integrate support for FCoE Initialization
> > (protocol) FIP. This protocol will be exercised on
> > Cisco UCS rack servers.
> > Add support to specifically print FIP related
> > debug messages.
> > Replace existing definitions to handle new
> > data structures.
> > Clean up old and obsolete definitions.
>
> Fill out text up to 72 characters.
>
> It really seems that multiple steps are required below
>
> There are approx 2.5K LoC changes here
>
> I don't know how anyone is supposed to review that
>
> Some sparse comments, below
Thanks for taking the time to review these large changes John.
Appreciate your help with this.
Sure, I'll take care of this in the next version.
> >
> > Reviewed-by: Sesidhar Baddela <sebaddel@...co.com>
> > Reviewed-by: Arulprabhu Ponnusamy <arulponn@...co.com>
> > Reviewed-by: Gian Carlo Boffa <gcboffa@...co.com>
> > Signed-off-by: Karan Tilak Kumar <kartilak@...co.com>
> > ---
> > drivers/scsi/fnic/Makefile | 1 +
> > drivers/scsi/fnic/fip.c | 875 +++++++++++++++++++++++++++++++++
> > drivers/scsi/fnic/fip.h | 341 +++++++++++++
> > drivers/scsi/fnic/fnic.h | 23 +-
> > drivers/scsi/fnic/fnic_fcs.c | 889 ++++++----------------------------
> > drivers/scsi/fnic/fnic_main.c | 47 +-
> > 6 files changed, 1402 insertions(+), 774 deletions(-)
> > create mode 100644 drivers/scsi/fnic/fip.c
> > create mode 100644 drivers/scsi/fnic/fip.h
> >
> > diff --git a/drivers/scsi/fnic/Makefile b/drivers/scsi/fnic/Makefile
> > index af156c69da0c..c025e875009e 100644
> > --- a/drivers/scsi/fnic/Makefile
> > +++ b/drivers/scsi/fnic/Makefile
> > @@ -2,6 +2,7 @@
> > obj-$(CONFIG_FCOE_FNIC) += fnic.o
> >
> > fnic-y := \
> > + fip.o\
> > fnic_attrs.o \
> > fnic_isr.o \
> > fnic_main.o \
> > diff --git a/drivers/scsi/fnic/fip.c b/drivers/scsi/fnic/fip.c
> > new file mode 100644
> > index 000000000000..8d4f6b98407b
> > --- /dev/null
> > +++ b/drivers/scsi/fnic/fip.c
> > @@ -0,0 +1,875 @@
> > +// SPDX-License-Identifier: GPL-2.0-only
> > +/*
> > + * Copyright 2008 Cisco Systems, Inc. All rights reserved.
> > + * Copyright 2007 Nuova Systems, Inc. All rights reserved.
> > + */
> > +#include "fnic.h"
> > +#include "fip.h"
> > +#include <linux/etherdevice.h>
> > +
> > +extern struct workqueue_struct *fnic_fip_queue;
> > +
> > +#define TRUE 1
> > +#define FALSE 0
>
> use true and false for boolean type - they are already available
Sure. Thanks for pointing this out.
I'll take care of this in the next version.
> > +
> > +int drop_rsp = TRUE;
>
> this is not even referenced in this patch
Sure. Thanks for pointing this out.
I'll take remove this in the next version.
> > +
> > +#define FIP_FNIC_RESET_WAIT_COUNT 15
> > +
> > +#define htonll(x) cpu_to_be64(x)
>
> why? just use cpu_to_be64() directly
Yes, thanks for pointing this out.
Based on your comments and Hannes' earlier comments, I'll modify this.
> > +
> > +/****************************** Functions ***********************************/
> > +
> > +/**
> > + * fnic_fcoe_reset_vlans
> > + *
> > + * Frees up the list of discovered vlans
> > + *
> > + * @param fnic driver instance
> > + */
> > +
> > +void fnic_fcoe_reset_vlans(struct fnic *fnic)
> > +{
> > + unsigned long flags;
> > + struct fcoe_vlan *vlan, *next;
> > +
> > + spin_lock_irqsave(&fnic->vlans_lock, flags);
> > + if (!list_empty(&fnic->vlan_list)) {
> > + list_for_each_entry_safe(vlan, next, &fnic->vlan_list, list) {
> > + list_del(&vlan->list);
> > + kfree(vlan);
> > + }
> > + }
> > +
> > + spin_unlock_irqrestore(&fnic->vlans_lock, flags);
> > + FNIC_FIP_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "Reset vlan complete\n");
> > +}
> > +
> > +/**
> > + * fnic_fcoe_send_vlan_req
> > + *
> > + * Sends FIP vlan request to all FCFs MAC
> > + *
> > + * @param fnic driver instance
> > + */
> > +
> > +void fnic_fcoe_send_vlan_req(struct fnic *fnic)
> > +{
> > + struct fnic_iport_s *iport = &fnic->iport;
> > + struct fnic_stats *fnic_stats = &fnic->fnic_stats;
> > + u64 vlan_tov;
> > +
> > + int fr_len;
> > + struct fip_vlan_req_s vlan_req;
> > +
> > + FNIC_FIP_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "Enter send vlan req\n");
> > + fnic_fcoe_reset_vlans(fnic);
> > +
> > + fnic->set_vlan(fnic, 0);
> > + FNIC_FIP_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "set vlan done\n");
> > +
> > + fr_len = sizeof(struct fip_vlan_req_s);
> > +
> > + FNIC_FIP_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "got MAC 0x%x:%x:%x:%x:%x:%x\n", iport->hwmac[0],
> > + iport->hwmac[1], iport->hwmac[2], iport->hwmac[3],
> > + iport->hwmac[4], iport->hwmac[5]);
> > +
> > + memcpy(&vlan_req, &fip_vlan_req_tmpl, fr_len);
> > + memcpy(vlan_req.eth.smac, iport->hwmac, ETH_ALEN);
> > + memcpy(vlan_req.mac_desc.mac, iport->hwmac, ETH_ALEN);
> > +
> > + atomic64_inc(&fnic_stats->vlan_stats.vlan_disc_reqs);
> > +
> > + iport->fip.state = FDLS_FIP_VLAN_DISCOVERY_STARTED;
> > +
> > + fnic_send_fip_frame(iport, &vlan_req, fr_len);
> > + FNIC_FIP_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "vlan req sent\n");
> > +
> > + vlan_tov = jiffies + msecs_to_jiffies(FCOE_CTLR_FIPVLAN_TOV);
> > + mod_timer(&fnic->retry_fip_timer, round_jiffies(vlan_tov));
> > + FNIC_FIP_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "fip timer set\n");
> > +}
> > +
> > +/**
> > + * fnic_fcoe_process_vlan_resp
> > + *
> > + * Processes the vlan response from one FCF and populates VLAN list.
> > + * Will wait for responses from multiple FCFs until timeout.
> > + *
> > + * @param fnic driver instance
> > + * @param fiph received fip frame
> > + */
> > +
> > +void fnic_fcoe_process_vlan_resp(struct fnic *fnic,
> > + struct fip_header_s *fiph)
> > +{
> > + struct fip_vlan_notif_s *vlan_notif = (struct fip_vlan_notif_s *) fiph;
> > +
> > + struct fnic_stats *fnic_stats = &fnic->fnic_stats;
> > + u16 vid;
> > + int num_vlan = 0;
> > + int cur_desc, desc_len;
> > + struct fcoe_vlan *vlan;
> > + struct fip_vlan_desc_s *vlan_desc;
> > + unsigned long flags;
> > +
> > + FNIC_FIP_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "fnic 0x%p got vlan resp\n", fnic);
> > +
> > + desc_len = ntohs(vlan_notif->fip.desc_len);
> > + FNIC_FIP_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "desc_len %d\n", desc_len);
> > +
> > + spin_lock_irqsave(&fnic->vlans_lock, flags);
> > +
> > + cur_desc = 0;
> > + while (desc_len > 0) {
> > + vlan_desc =
> > + (struct fip_vlan_desc_s *) (((char *) vlan_notif->vlans_desc)
> > + + cur_desc * 4);
> > +
> > + if (vlan_desc->type == FIP_TYPE_VLAN) {
> > + if (vlan_desc->len != 1) {
> > + FNIC_FIP_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "Invalid descriptor length(%x) in VLan response\n",
> > + vlan_desc->len);
> > +
> > + }
> > + num_vlan++;
> > + vid = ntohs(vlan_desc->vlan);
> > + FNIC_FIP_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "process_vlan_resp: FIP VLAN %d\n", vid);
> > + vlan = kmalloc(sizeof(*vlan), GFP_ATOMIC);
>
>
> is this alloc under spinlock really required?
Sure. Thanks for pointing this out.
The team will revisit this for the next version.
> > +
> > + if (!vlan) {
> > + /* retry from timer */
> > + FNIC_FIP_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "Mem Alloc failure\n");
> > + spin_unlock_irqrestore(&fnic->vlans_lock, flags);
> > + goto out;
> > + }
> > + memset(vlan, 0, sizeof(struct fcoe_vlan));
>
> kzalloc should have been used
Sure. I'll take care of this in the next version.
> > + vlan->vid = vid & 0x0fff;
> > + vlan->state = FIP_VLAN_AVAIL;
> > + list_add_tail(&vlan->list, &fnic->vlan_list);
> > + break;
> > + } else {
> > + FNIC_FIP_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "Invalid descriptor type(%x) in VLan response\n",
> > + vlan_desc->type);
> > + /*
> > + * Note : received a type=2 descriptor here i.e. FIP
> > + * MAC Address Descriptor
> > + */
> > + }
> > + cur_desc += vlan_desc->len;
> > + desc_len -= vlan_desc->len;
> > + }
> > +
> > + /* any VLAN descriptors present ? */
> > + if (num_vlan == 0) {
> > + atomic64_inc(&fnic_stats->vlan_stats.resp_withno_vlanID);
> > + FNIC_FIP_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "fnic 0x%p No VLAN descriptors in FIP VLAN response\n",
> > + fnic);
> > + }
> > +
> > + spin_unlock_irqrestore(&fnic->vlans_lock, flags);
> > +
> > +out:
> > + return;
> > +}
> > +
> > +/**
> > + * fnic_fcoe_start_fcf_discovery
> > + *
> > + * Starts FIP FCF discovery in a selected vlan
> > + *
> > + * @param fnic driver instance
> > + */
> > +
> > +void fnic_fcoe_start_fcf_discovery(struct fnic *fnic)
> > +{
> > + struct fnic_iport_s *iport = &fnic->iport;
> > + u64 fcs_tov;
> > +
> > + int fr_len;
> > + struct fip_discovery_s disc_sol;
> > +
> > + FNIC_FIP_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "fnic 0x%p start fcf discovery\n", fnic);
> > + fr_len = sizeof(struct fip_discovery_s);
> > + memset(iport->selected_fcf.fcf_mac, 0, ETH_ALEN);
> > +
> > + memcpy(&disc_sol, &fip_discovery_tmpl, fr_len);
> > + memcpy(disc_sol.eth.smac, iport->hwmac, ETH_ALEN);
> > + memcpy(disc_sol.mac_desc.mac, iport->hwmac, ETH_ALEN);
> > + iport->selected_fcf.fcf_priority = 0xFF;
> > +
> > + disc_sol.name_desc.name = htonll(iport->wwnn);
> > + fnic_send_fip_frame(iport, &disc_sol, fr_len);
> > +
> > + iport->fip.state = FDLS_FIP_FCF_DISCOVERY_STARTED;
> > +
> > + fcs_tov = jiffies + msecs_to_jiffies(FCOE_CTLR_FCS_TOV);
> > + mod_timer(&fnic->retry_fip_timer, round_jiffies(fcs_tov));
> > +
> > + FNIC_FIP_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "fnic 0x%p Started FCF discovery", fnic);
> > +
> > +}
> > +
> > +/**
> > + * fnic_fcoe_fip_discovery_resp
> > + *
> > + * Processes FCF advertisements.
> > + * They can be:
> > + * solicited Sent in response of a discover FCF FIP request
> > + * We will only store the information of the FCF with
> > + * highest priority.
> > + * We wait until timeout in case of multiple FCFs.
> > + * unsolicited Sent periodically by the FCF for keep alive.
> > + * If FLOGI is in progress or completed and the advertisement is
> > + * received by our selected FCF, refresh the keep alive timer.
> > + *
> > + * @param fnic driver instance
> > + * @param fiph received frame
> > + */
> > +
> > +void fnic_fcoe_fip_discovery_resp(struct fnic *fnic,
> > + struct fip_header_s *fiph)
> > +{
> > + struct fnic_iport_s *iport = &fnic->iport;
> > + struct fip_disc_adv_s *disc_adv = (struct fip_disc_adv_s *) fiph;
> > + u64 fcs_ka_tov;
> > + int fka_has_changed;
> > +
> > + if (iport->fip.state == FDLS_FIP_FCF_DISCOVERY_STARTED) {
> > + if (ntohs(disc_adv->fip.flags) & FIP_FLAG_S) {
> > + FNIC_FIP_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "fnic 0x%p Solicited adv\n", fnic);
> > +
> > + if ((disc_adv->prio_desc.priority <
> > + iport->selected_fcf.fcf_priority)
> > + && (ntohs(disc_adv->fip.flags) & FIP_FLAG_A)) {
> > +
> > + FNIC_FIP_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "fnic 0x%p FCF Available\n", fnic);
> > + memcpy(iport->selected_fcf.fcf_mac, disc_adv->mac_desc.mac,
> > + ETH_ALEN);
> > + iport->selected_fcf.fcf_priority =
> > + disc_adv->prio_desc.priority;
> > + iport->selected_fcf.fka_adv_period =
> > + ntohl(disc_adv->fka_adv_desc.fka_adv);
> > + FNIC_FIP_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "adv time %d",
> > + iport->selected_fcf.fka_adv_period);
> > + iport->selected_fcf.ka_disabled =
> > + (disc_adv->fka_adv_desc.rsvd_D & 1);
> > + }
> > + }
> > + } else if ((iport->fip.state == FDLS_FIP_FLOGI_STARTED)
>
> switch statement is better here
Makes sense. I'll modify this in the next version.
> > + || (iport->fip.state == FDLS_FIP_FLOGI_COMPLETE)) {
> > + if (!(ntohs(disc_adv->fip.flags) & FIP_FLAG_S)) {
> > + /* same fcf */
> > + if (memcmp(iport->selected_fcf.fcf_mac, disc_adv->mac_desc.mac,
> > + ETH_ALEN) == 0) {
> > + if (iport->selected_fcf.fka_adv_period
> > + != ntohl(disc_adv->fka_adv_desc.fka_adv)) {
> > + iport->selected_fcf.fka_adv_period =
> > + ntohl(disc_adv->fka_adv_desc.fka_adv);
> > + FNIC_FIP_DBG(KERN_INFO, fnic->lport->host,
> > + fnic->fnic_num, "change fka to %d",
> > + iport->selected_fcf.fka_adv_period);
> > + }
> > +
> > + fka_has_changed = (iport->selected_fcf.ka_disabled == 1)
> > + && ((disc_adv->fka_adv_desc.rsvd_D & 1) == 0);
> > +
> > + iport->selected_fcf.ka_disabled =
> > + (disc_adv->fka_adv_desc.rsvd_D & 1);
> > + if (!((iport->selected_fcf.ka_disabled)
> > + || (iport->selected_fcf.fka_adv_period == 0))) {
> > +
> > + fcs_ka_tov = jiffies
> > + + 3
> > + *
> > + msecs_to_jiffies(
> > + iport->selected_fcf.fka_adv_period);
> > + mod_timer(&fnic->fcs_ka_timer,
> > + round_jiffies(fcs_ka_tov));
> > +
> > + } else {
> > + if (timer_pending(&fnic->fcs_ka_timer))
> > + del_timer_sync(&fnic->fcs_ka_timer);
> > + }
> > +
> > + if (fka_has_changed) {
> > + u64 tov;
> > +
> > + if (iport->selected_fcf.fka_adv_period != 0) {
> > +
> > + tov = jiffies +
> > + msecs_to_jiffies(
> > + iport->selected_fcf.fka_adv_period);
> > + mod_timer(&fnic->enode_ka_timer,
> > + round_jiffies(tov));
> > +
> > + tov =
> > + jiffies +
> > + msecs_to_jiffies(FCOE_CTLR_VN_KA_TOV);
> > + mod_timer(&fnic->vn_ka_timer, round_jiffies(tov));
>
> all this code is too complicated
I understand the challenge. The Cisco team will review if any simplifications
are possible here.
> > + }
> > + }
> > + }
> > + }
> > + }
> > +}
> > +
> > +/**
> > + * fnic_fcoe_start_flogi
> > + *
> > + * Sends FIP FLOGI to the selected FCF
> > + *
> > + * @param fnic driver instance
> > + */
> > +
> > +void fnic_fcoe_start_flogi(struct fnic *fnic)
> > +{
> > + struct fnic_iport_s *iport = &fnic->iport;
> > +
> > + int fr_len;
> > + struct fip_flogi_s flogi_req;
> > + u64 flogi_tov;
> > +
> > + fr_len = sizeof(struct fip_flogi_s);
> > + FNIC_FIP_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "fnic 0x%p Start fip FLOGI\n", fnic);
> > +
> > + memcpy(&flogi_req, &fip_flogi_tmpl, fr_len);
> > + memcpy(flogi_req.eth.smac, iport->hwmac, ETH_ALEN);
> > + if (iport->usefip)
> > + memcpy(flogi_req.eth.dmac, iport->selected_fcf.fcf_mac, ETH_ALEN);
> > +
> > + flogi_req.flogi_desc.flogi.nport_name = htonll(iport->wwpn);
> > + flogi_req.flogi_desc.flogi.node_name = htonll(iport->wwnn);
> > +
> > + fnic_send_fip_frame(iport, &flogi_req, fr_len);
> > + iport->fip.flogi_retry++;
> > +
> > + iport->fip.state = FDLS_FIP_FLOGI_STARTED;
> > + flogi_tov = jiffies + msecs_to_jiffies(fnic->config.flogi_timeout);
> > + mod_timer(&fnic->retry_fip_timer, round_jiffies(flogi_tov));
> > +}
> > +
> > +/**
> > + * fnic_fcoe_process_flogi_resp
> > + *
> > + * Processes FLOGI response from FCF.
> > + * If successful saves assigned fc_id and MAC, programs firmware
> > + * and starts fdls discovery.
> > + * Else restarts vlan discovery.
> > + *
> > + * @param fnic driver instance
> > + * @param fiph received frame
> > + */
> > +
> > +void fnic_fcoe_process_flogi_resp(struct fnic *fnic,
> > + struct fip_header_s *fiph)
> > +{
> > + struct fnic_iport_s *iport = &fnic->iport;
> > + struct fip_flogi_rsp_s *flogi_rsp = (struct fip_flogi_rsp_s *) fiph;
> > + int desc_len;
> > + uint32_t s_id;
> > +
> > + struct fnic_stats *fnic_stats = &fnic->fnic_stats;
> > +
> > + FNIC_FIP_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "fnic 0x%p FIP FLOGI rsp\n", fnic);
> > + desc_len = ntohs(flogi_rsp->fip.desc_len);
> > + if (desc_len != 38) {
> > + FNIC_FIP_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "Invalid Descriptor List len (%x). Dropping frame\n",
> > + desc_len);
> > + return;
> > + }
> > +
> > + if (!
> > + ((flogi_rsp->rsp_desc.type == 7)
> > + && (flogi_rsp->rsp_desc.len == 36))
> > + || !((flogi_rsp->mac_desc.type == 2)
> > + && (flogi_rsp->mac_desc.len == 2))) {
> > + FNIC_FIP_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "Dropping frame invalid type and len mix\n");
> > + return;
> > + }
> > +
> > + s_id = ntoh24(flogi_rsp->rsp_desc.els.fchdr.sid);
> > + if ((flogi_rsp->rsp_desc.els.fchdr.f_ctl != 0x98)
> > + || (flogi_rsp->rsp_desc.els.fchdr.r_ctl != 0x23)
> > + || (s_id != 0xFFFFFE)
> > + || (flogi_rsp->rsp_desc.els.fchdr.ox_id != FNIC_FLOGI_OXID)
> > + || (flogi_rsp->rsp_desc.els.fchdr.type != 0x01)) {
> > + FNIC_FIP_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "Dropping invalid frame: s_id %x F %x R %x t %x OX_ID %x\n",
> > + s_id,
> > + flogi_rsp->rsp_desc.els.fchdr.f_ctl,
> > + flogi_rsp->rsp_desc.els.fchdr.r_ctl,
> > + flogi_rsp->rsp_desc.els.fchdr.type,
> > + flogi_rsp->rsp_desc.els.fchdr.ox_id);
> > + return;
> > + }
> > +
> > + if (iport->fip.state == FDLS_FIP_FLOGI_STARTED) {
> > + FNIC_FIP_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "fnic 0x%p rsp for pending FLOGI\n", fnic);
> > +
> > + del_timer_sync(&fnic->retry_fip_timer);
> > +
> > + if ((ntohs(flogi_rsp->fip.desc_len) == 38)
> > + && (flogi_rsp->rsp_desc.els.command == FC_LS_ACC)) {
> > +
> > + FNIC_FIP_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "fnic 0x%p FLOGI success\n", fnic);
> > + memcpy(iport->fpma, flogi_rsp->mac_desc.mac, ETH_ALEN);
> > + iport->fcid = ntoh24(flogi_rsp->rsp_desc.els.fchdr.did);
> > +
> > + iport->r_a_tov =
> > + ntohl(flogi_rsp->rsp_desc.els.u.csp_flogi.r_a_tov);
> > + iport->e_d_tov =
> > + ntohl(flogi_rsp->rsp_desc.els.u.csp_flogi.e_d_tov);
> > + memcpy(fnic->iport.fcfmac, iport->selected_fcf.fcf_mac,
> > + ETH_ALEN);
> > + vnic_dev_add_addr(fnic->vdev, flogi_rsp->mac_desc.mac);
> > +
> > + if (fnic_fdls_register_portid(iport, iport->fcid, NULL) != 0) {
> > + FNIC_FIP_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "fnic 0x%p flogi registration failed\n",
> > + fnic);
> > + return;
> > + }
> > +
> > + iport->fip.state = FDLS_FIP_FLOGI_COMPLETE;
> > + iport->state = FNIC_IPORT_STATE_FABRIC_DISC;
> > + FNIC_FIP_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "iport->state:%d\n", iport->state);
> > + if (!((iport->selected_fcf.ka_disabled)
> > + || (iport->selected_fcf.fka_adv_period == 0))) {
> > + u64 tov;
> > +
> > + tov = jiffies
> > + + msecs_to_jiffies(iport->selected_fcf.fka_adv_period);
> > + mod_timer(&fnic->enode_ka_timer, round_jiffies(tov));
> > +
> > + tov = jiffies + msecs_to_jiffies(FCOE_CTLR_VN_KA_TOV);
> > + mod_timer(&fnic->vn_ka_timer, round_jiffies(tov));
> > +
> > + }
> > + } else {
> > + /*
> > + * If there's FLOGI rejects - clear all
> > + * fcf's & restart from scratch
> > + */
> > + atomic64_inc(&fnic_stats->vlan_stats.flogi_rejects);
> > + /* start FCoE VLAN discovery */
> > + fnic_fcoe_send_vlan_req(fnic);
> > +
> > + iport->fip.state = FDLS_FIP_VLAN_DISCOVERY_STARTED;
> > + }
> > + }
> > +}
> > +
> > +/**
> > + * fnic_common_fip_cleanup
> > + *
> > + * Cleans up FCF info and timers in case of link down/CVL
> > + *
> > + * @param fnic driver instance
> > + */
> > +
> > +void fnic_common_fip_cleanup(struct fnic *fnic)
> > +{
> > +
> > + struct fnic_iport_s *iport = &fnic->iport;
> > +
> > + if (!iport->usefip)
> > + return;
> > + FNIC_FIP_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "fnic 0x%p fip cleanup\n", fnic);
> > +
> > + iport->fip.state = FDLS_FIP_INIT;
> > +
> > + del_timer_sync(&fnic->retry_fip_timer);
> > + del_timer_sync(&fnic->fcs_ka_timer);
> > + del_timer_sync(&fnic->enode_ka_timer);
> > + del_timer_sync(&fnic->vn_ka_timer);
> > +
> > + if (!is_zero_ether_addr(iport->fpma))
> > + vnic_dev_del_addr(fnic->vdev, iport->fpma);
> > +
> > + memset(iport->fpma, 0, ETH_ALEN);
> > + iport->fcid = 0;
> > + iport->r_a_tov = 0;
> > + iport->e_d_tov = 0;
> > + memset(fnic->iport.fcfmac, 0, ETH_ALEN);
> > + memset(iport->selected_fcf.fcf_mac, 0, ETH_ALEN);
> > + iport->selected_fcf.fcf_priority = 0;
> > + iport->selected_fcf.fka_adv_period = 0;
> > + iport->selected_fcf.ka_disabled = 0;
> > +
> > + fnic_fcoe_reset_vlans(fnic);
> > +}
> > +
> > +/**
> > + * fnic_fcoe_process_cvl
> > + *
> > + * Processes Clear Virtual Link from FCF
> > + * Verifies that cvl is received from our current FCF for our assigned MAC
> > + * Cleans up and restarts the vlan discovery
> > + *
> > + * @param fnic driver instance
> > + * @param fiph received frame
> > + */
> > +
> > +void fnic_fcoe_process_cvl(struct fnic *fnic, struct fip_header_s *fiph)
> > +{
> > + struct fnic_iport_s *iport = &fnic->iport;
> > + struct fip_cvl_s *cvl_msg = (struct fip_cvl_s *) fiph;
> > + int i;
> > + int found = FALSE;
> > +
> > + FNIC_FIP_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "fnic 0x%p clear virtual link handler\n", fnic);
> > +
> > + if (!
> > + ((cvl_msg->fcf_mac_desc.type == 2)
> > + && (cvl_msg->fcf_mac_desc.len == 2))
> > +|| !((cvl_msg->name_desc.type == 4) && (cvl_msg->name_desc.len == 3))) {
> > +
> > + FNIC_FIP_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "invalid mix: ft %x fl %x ndt %x ndl %x",
> > + cvl_msg->fcf_mac_desc.type, cvl_msg->fcf_mac_desc.len,
> > + cvl_msg->name_desc.type, cvl_msg->name_desc.len);
> > + }
> > +
> > + if (memcmp
> > + (iport->selected_fcf.fcf_mac, cvl_msg->fcf_mac_desc.mac, ETH_ALEN)
> > + == 0) {
>
> you could do:
>
> if (memcmp
> > + (iport->selected_fcf.fcf_mac, cvl_msg->fcf_mac_desc.mac, ETH_ALEN))
> return;
>
> and then have the rest, below, to reduce indentation
Sure. I'll take care of this in the next version.
> > + for (i = 0; i < ((ntohs(fiph->desc_len) / 5) - 1); i++) {
> > + if (!((cvl_msg->vn_ports_desc[i].type == 11)
> > + && (cvl_msg->vn_ports_desc[i].len == 5))) {
> > +
> > + FNIC_FIP_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "Invalid type and len mix type: %d len: %d\n",
> > + cvl_msg->vn_ports_desc[i].type,
> > + cvl_msg->vn_ports_desc[i].len);
> > + }
> > + if (memcmp(iport->fpma, cvl_msg->vn_ports_desc[i].vn_port_mac,
> > + ETH_ALEN) == 0) {
> > + found = TRUE;
> > + break;
> > + }
> > + }
> > + if (!found)
> > + return;
> > + fnic_common_fip_cleanup(fnic);
> > +
> > + fnic_fcoe_send_vlan_req(fnic);
> > + }
> > +}
> > +
> > +/**
> > + * fdls_fip_recv_frame
> > + *
> > + * Demultiplexer for FIP frames
> > + *
> > + * @param fnic driver instance
> > + * @param frame received ethernet frame
> > + * @return Frame processed by FIP
> > + */
> > +
> > +int fdls_fip_recv_frame(struct fnic *fnic, void *frame)
> > +{
> > + struct eth_hdr_s *eth = (struct eth_hdr_s *) frame;
> > + struct fip_header_s *fiph;
> > + u16 protocol;
> > + u8 sub;
> > +
> > + if (eth->eth_type == ntohs(FIP_ETH_TYPE)) {
> > + fiph = (struct fip_header_s *) (eth + 1);
> > + protocol = ntohs(fiph->protocol);
> > + sub = ntohs(fiph->subcode);
> > +
> > + if (protocol == FIP_DISCOVERY && sub == FIP_SUBCODE_RESP)
> > + fnic_fcoe_fip_discovery_resp(fnic, fiph);
> > + else if (protocol == FIP_VLAN_DISC && sub == FIP_SUBCODE_RESP)
> > + fnic_fcoe_process_vlan_resp(fnic, fiph);
> > + else if (protocol == FIP_KA_CVL && sub == FIP_SUBCODE_RESP)
> > + fnic_fcoe_process_cvl(fnic, fiph);
> > + else if (protocol == FIP_FLOGI && sub == FIP_SUBCODE_RESP)
> > + fnic_fcoe_process_flogi_resp(fnic, fiph);
> > +
> > + return 1;
> > + }
> > + return 0;
>
> what does 1 and 0 mean here?
It is just meant to indicate whether a FIP frame was received or not.
If it was, then the frame can be freed in the caller.
I understand the need to make the meaning clearer here.
I can fix this with the built-in TRUE or FALSE.
Thanks for pointing it out.
> > +}
> > +
> > +void fnic_work_on_fip_timer(struct work_struct *work)
> > +{
> > + struct fnic *fnic = container_of(work, struct fnic, fip_timer_work);
> > + struct fnic_iport_s *iport = &fnic->iport;
> > +
> > + FNIC_FIP_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "FIP timeout\n");
> > +
> > + if (iport->fip.state == FDLS_FIP_VLAN_DISCOVERY_STARTED) {
> > + fnic_vlan_discovery_timeout(fnic);
> > + } else if (iport->fip.state == FDLS_FIP_FCF_DISCOVERY_STARTED) {
> > + u8 zmac[ETH_ALEN] = { 0, 0, 0, 0, 0, 0 };
> > +
> > + FNIC_FIP_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "FCF Discovery timeout\n");
> > + if (memcmp(iport->selected_fcf.fcf_mac, zmac, ETH_ALEN) != 0) {
> > +
> > + if (iport->flags & FNIC_FIRST_LINK_UP)
> > + iport->flags &= ~FNIC_FIRST_LINK_UP;
> > +
> > + fnic_fcoe_start_flogi(fnic);
> > + if (!((iport->selected_fcf.ka_disabled)
> > + || (iport->selected_fcf.fka_adv_period == 0))) {
> > + u64 fcf_tov;
> > +
> > + fcf_tov = jiffies
> > + + 3
> > + * msecs_to_jiffies(iport->selected_fcf.fka_adv_period);
> > + mod_timer(&fnic->fcs_ka_timer, round_jiffies(fcf_tov));
> > + }
> > + } else {
> > + FNIC_FIP_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "FCF Discovery timeout\n");
> > + fnic_vlan_discovery_timeout(fnic);
> > + }
> > + } else if (iport->fip.state == FDLS_FIP_FLOGI_STARTED) {
> > + FNIC_FIP_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "FLOGI timeout\n");
> > + if (iport->fip.flogi_retry < fnic->config.flogi_retries)
> > + fnic_fcoe_start_flogi(fnic);
> > + else
> > + fnic_vlan_discovery_timeout(fnic);
> > + }
> > +}
> > +
> > +/**
> > + * fnic_handle_fip_timer
> > + *
> > + * Timeout handler for FIP discover phase.
> > + * Based on the current state, starts next phase or restarts discovery
> > + *
> > + * @param data Opaque pointer to fnic structure
> > + */
> > +
> > +void fnic_handle_fip_timer(struct timer_list *t)
> > +{
> > + struct fnic *fnic = from_timer(fnic, t, retry_fip_timer);
> > +
> > + INIT_WORK(&fnic->fip_timer_work, fnic_work_on_fip_timer);
>
> do you really need to init every time?
>
> > + queue_work(fnic_fip_queue, &fnic->fip_timer_work);
> > +}
> > +
> > +/**
> > + * fnic_handle_enode_ka_timer
> > + *
> > + * FIP node keep alive.
> > + *
> > + * @param data Opaque pointer to fnic struct
> > + */
> > +void fnic_handle_enode_ka_timer(struct timer_list *t)
> > +{
> > + struct fnic *fnic = from_timer(fnic, t, enode_ka_timer);
> > +
> > + struct fnic_iport_s *iport = &fnic->iport;
> > + int fr_len;
> > + struct fip_enode_ka_s enode_ka;
> > + u64 enode_ka_tov;
> > +
> > + if (iport->fip.state != FDLS_FIP_FLOGI_COMPLETE)
> > + return;
> > +
> > + if ((iport->selected_fcf.ka_disabled)
> > + || (iport->selected_fcf.fka_adv_period == 0)) {
> > + return;
> > + }
> > +
> > + fr_len = sizeof(struct fip_enode_ka_s);
> > +
> > + memcpy(&enode_ka, &fip_enode_ka_tmpl, fr_len);
> > + memcpy(enode_ka.eth.smac, iport->hwmac, ETH_ALEN);
> > + memcpy(enode_ka.eth.dmac, iport->selected_fcf.fcf_mac, ETH_ALEN);
> > + memcpy(enode_ka.mac_desc.mac, iport->hwmac, ETH_ALEN);
> > +
> > + fnic_send_fip_frame(iport, &enode_ka, fr_len);
> > + enode_ka_tov = jiffies
> > + + msecs_to_jiffies(iport->selected_fcf.fka_adv_period);
> > + mod_timer(&fnic->enode_ka_timer, round_jiffies(enode_ka_tov));
> > +}
> > +
> > +/**
> > + * fnic_handle_vn_ka_timer
> > + *
> > + * FIP virtual port keep alive.
> > + *
> > + * @param data Opaque pointer to fnic structure
> > + */
> > +
> > +void fnic_handle_vn_ka_timer(struct timer_list *t)
> > +{
> > + struct fnic *fnic = from_timer(fnic, t, vn_ka_timer);
> > +
> > + struct fnic_iport_s *iport = &fnic->iport;
> > + int fr_len;
> > + struct fip_vn_port_ka_s vn_port_ka;
> > + u64 vn_ka_tov;
> > + uint8_t fcid[3];
> > +
> > + if (iport->fip.state != FDLS_FIP_FLOGI_COMPLETE)
> > + return;
> > +
> > + if ((iport->selected_fcf.ka_disabled)
> > + || (iport->selected_fcf.fka_adv_period == 0)) {
> > + return;
> > + }
>
> exact same code is duplicated from fnic_handle_enode_ka_timer(), above
The Cisco team can evaluate if it is possible to make some modifications
in this area in light of your comments.
> > +
> > + fr_len = sizeof(struct fip_vn_port_ka_s);
> > +
> > + memcpy(&vn_port_ka, &fip_vn_port_ka_tmpl, fr_len);
> > + memcpy(vn_port_ka.eth.smac, iport->fpma, ETH_ALEN);
> > + memcpy(vn_port_ka.eth.dmac, iport->selected_fcf.fcf_mac, ETH_ALEN);
> > + memcpy(vn_port_ka.mac_desc.mac, iport->hwmac, ETH_ALEN);
> > + memcpy(vn_port_ka.vn_port_desc.vn_port_mac, iport->fpma, ETH_ALEN);
> > + hton24(fcid, iport->fcid);
> > + memcpy(vn_port_ka.vn_port_desc.vn_port_id, fcid, 3);
> > + vn_port_ka.vn_port_desc.vn_port_name = htonll(iport->wwpn);
> > +
> > + fnic_send_fip_frame(iport, &vn_port_ka, fr_len);
> > + vn_ka_tov = jiffies + msecs_to_jiffies(FCOE_CTLR_VN_KA_TOV);
> > + mod_timer(&fnic->vn_ka_timer, round_jiffies(vn_ka_tov));
> > +}
> > +
> > +/**
> > + * fnic_vlan_discovery_timeout
> > + *
> > + * End of VLAN discovery or FCF discovery time window
> > + * Start the FCF discovery if VLAN was never used
> > + * Retry in case of FCF not responding or move to next VLAN
> > + *
> > + * @param fnic driver instance
> > + */
> > +
> > +void fnic_vlan_discovery_timeout(struct fnic *fnic)
> > +{
> > + struct fcoe_vlan *vlan;
> > + struct fnic_iport_s *iport = &fnic->iport;
> > + struct fnic_stats *fnic_stats = &fnic->fnic_stats;
> > + unsigned long flags;
> > +
> > + spin_lock_irqsave(&fnic->fnic_lock, flags);
> > + if (fnic->stop_rx_link_events) {
>
> I assume that you are relying in the in-built memory barriers in
> spin_lock_irqsave() and spin_unlock_irqrestore()...
Yes John. That's correct.
> > + spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> > + return;
> > + }
> > + spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> > +
> > + if (!iport->usefip)
> > + return;
> > +
> > + spin_lock_irqsave(&fnic->vlans_lock, flags);
>
> it's hardly worth dropping the lock before the !iport->usefip check.
Makes sense. We'll evaluate a modification here for the next version.
> > + if (list_empty(&fnic->vlan_list)) {
> > + /* no vlans available, try again */
> > + spin_unlock_irqrestore(&fnic->vlans_lock, flags);
> > + fnic_fcoe_send_vlan_req(fnic);
> > + return;
> > + }
> > +
> > + vlan = list_first_entry(&fnic->vlan_list, struct fcoe_vlan, list);
> > +
> > + if (vlan->state == FIP_VLAN_SENT) {
> > + if (vlan->sol_count >= FCOE_CTLR_MAX_SOL) {
> > + /*
> > + * no response on this vlan, remove from the list.
> > + * Try the next vlan
> > + */
> > + list_del(&vlan->list);
> > + kfree(vlan);
> > + vlan = NULL;
> > + if (list_empty(&fnic->vlan_list)) {
> > + /* we exhausted all vlans, restart vlan disc */
> > + spin_unlock_irqrestore(&fnic->vlans_lock, flags);
> > + fnic_fcoe_send_vlan_req(fnic);
> > + return;
> > + }
> > + /* check the next vlan */
> > + vlan =
> > + list_first_entry(&fnic->vlan_list, struct fcoe_vlan, list);
> > +
> > + fnic->set_vlan(fnic, vlan->vid);
> > + vlan->state = FIP_VLAN_SENT; /* sent now */
> > +
> > + }
> > + atomic64_inc(&fnic_stats->vlan_stats.sol_expiry_count);
> > +
> > + } else {
> > + fnic->set_vlan(fnic, vlan->vid);
> > + vlan->state = FIP_VLAN_SENT; /* sent now */
> > + }
> > + vlan->sol_count++;
> > + spin_unlock_irqrestore(&fnic->vlans_lock, flags);
> > + fnic_fcoe_start_fcf_discovery(fnic);
> > +}
> > +
> > +/**
> > + * fnic_work_on_fcs_ka_timer - finish handling fcs_ka_timer in process context
> > + * We need to finish this timer in a process context so that we do
> > + * not hand in fip_common_cleanup. Here we clean up, bring the link down
> > + * and restart all FIP discovery.
> > + *
> > + * @work - the work queue that we will be servicing
> > + */
> > +
> > +void fnic_work_on_fcs_ka_timer(struct work_struct *work)
> > +{
> > + struct fnic
> > + *fnic = container_of(work, struct fnic, fip_timer_work);
> > + struct fnic_iport_s *iport = &fnic->iport;
> > +
> > + FNIC_FIP_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "fnic 0x%p fcs ka timeout\n", fnic);
> > +
> > + fnic_common_fip_cleanup(fnic);
> > + spin_lock_irqsave(&fnic->fnic_lock, fnic->lock_flags);
> > + iport->state = FNIC_IPORT_STATE_FIP;
> > + spin_unlock_irqrestore(&fnic->fnic_lock, fnic->lock_flags);
> > +
> > + fnic_fcoe_send_vlan_req(fnic);
> > +}
> > +
> > +/**
> > + * fnic_handle_fcs_ka_timer
> > + *
> > + * No keep alives received from FCF. Clean up, bring the link down
> > + * and restart all the FIP discovery.
> > + *
> > + * @param data Opaque pointer to fnic structure
> > + */
> > +void fnic_handle_fcs_ka_timer(struct timer_list *t)
> > +{
> > + struct fnic *fnic = from_timer(fnic, t, fcs_ka_timer);
> > +
> > + INIT_WORK(&fnic->fip_timer_work, fnic_work_on_fcs_ka_timer);
> > + queue_work(fnic_fip_queue, &fnic->fip_timer_work);
> > +}
> > diff --git a/drivers/scsi/fnic/fip.h b/drivers/scsi/fnic/fip.h
> > new file mode 100644
> > index 000000000000..33562c5a41e0
> > --- /dev/null
> > +++ b/drivers/scsi/fnic/fip.h
> > @@ -0,0 +1,341 @@
> > +/* SPDX-License-Identifier: GPL-2.0-only */
> > +/*
> > + * Copyright 2008 Cisco Systems, Inc. All rights reserved.
> > + * Copyright 2007 Nuova Systems, Inc. All rights reserved.
>
> Is this a driver for HW older than 15 years?
As mentioned to Hannes' in another comment, this driver will have support
for earlier HW as well.
> > + */
> > +#ifndef _FIP_H_
> > +#define _FIP_H_
> > +
> > +#include "fdls_fc.h"
> > +
> > +#define FCOE_ALL_FCFS_MAC {0x01, 0x10, 0x18, 0x01, 0x00, 0x02}
> > +#define FIP_ETH_TYPE 0x8914
> > +
> > +#define FIP_ETH_TYPE_LE 0x1489
> > +#define FCOE_MAX_SIZE_LE 0x2E08
> > +
> > +#define WWNN_LEN 8
> > +
> > +#define FCOE_CTLR_FIPVLAN_TOV (3*1000)
> > +#define FCOE_CTLR_FCS_TOV (3*1000)
> > +#define FCOE_CTLR_VN_KA_TOV (90*1000)
> > +#define FCOE_CTLR_MAX_SOL (5*1000)
> > +
> > +#define FIP_SUBCODE_REQ 1
> > +#define FIP_SUBCODE_RESP 2
> > +
> > +#define FIP_FLAG_S 0x2
> > +#define FIP_FLAG_A 0x4
> > +
> > +/*
> > + * VLAN entry.
> > + */
> > +struct fcoe_vlan {
> > + struct list_head list;
> > + uint16_t vid; /* vlan ID */
> > + uint16_t sol_count; /* no. of sols sent */
> > + uint16_t state; /* state */
> > +};
> > +
> > +enum fdls_vlan_state_e {
> > + FIP_VLAN_AVAIL,
> > + FIP_VLAN_SENT
> > +};
> > +
> > +enum fdls_fip_state_e {
> > + FDLS_FIP_INIT,
> > + FDLS_FIP_VLAN_DISCOVERY_STARTED,
> > + FDLS_FIP_FCF_DISCOVERY_STARTED,
> > + FDLS_FIP_FLOGI_STARTED,
> > + FDLS_FIP_FLOGI_COMPLETE,
> > +};
> > +
> > +enum fip_protocol_code_e {
> > + FIP_DISCOVERY = 1,
> > + FIP_FLOGI,
> > + FIP_KA_CVL,
> > + FIP_VLAN_DISC
> > +};
> > +
> > +struct eth_hdr_s {
> > + uint8_t dmac[6];
> > + uint8_t smac[6];
> > + uint16_t eth_type;
> > +};
> > +
> > +struct fip_header_s {
> > + uint32_t ver:16;
> > +
> > + uint32_t protocol:16;
> > + uint32_t subcode:16;
> > +
> > + uint32_t desc_len:16;
> > + uint32_t flags:16;
> > +} __packed;
>
>
> Do you really want to use __packed?
>
> I don't even get what you are trying to do here in terms of formatting
> of these structures and their members.
Yes John. These are protocol related structures that need the __packed attribute.
Based on Hannes' comments from other patches, we're also evaluating using
the existing headers for these standard protocol structures.
> > +
> > +enum fip_desc_type_e {
> > + FIP_TYPE_PRIORITY = 1,
> > + FIP_TYPE_MAC,
> > + FIP_TYPE_FCMAP,
> > + FIP_TYPE_NAME_ID,
> > + FIP_TYPE_FABRIC,
> > + FIP_TYPE_MAX_FCOE,
> > + FIP_TYPE_FLOGI,
> > + FIP_TYPE_FDISC,
> > + FIP_TYPE_LOGO,
> > + FIP_TYPE_ELP,
> > + FIP_TYPE_VX_PORT,
> > + FIP_TYPE_FKA_ADV,
> > + FIP_TYPE_VENDOR_ID,
> > + FIP_TYPE_VLAN
> > +};
> > +
> > +struct fip_mac_desc_s {
> > + uint8_t type;
> > + uint8_t len;
> > + uint8_t mac[6];
> > +} __packed;
> > +
> > +struct fip_vlan_desc_s {
> > + uint8_t type;
> > + uint8_t len;
> > + uint16_t vlan;
> > +} __packed;
> > +
> > +struct fip_vlan_req_s {
> > + struct eth_hdr_s eth;
> > + struct fip_header_s fip;
> > + struct fip_mac_desc_s mac_desc;
> > +} __packed;
> > +
> > + /*
> > + * Variables:
> > + * eth.smac, mac_desc.mac
> > + */
> > +struct fip_vlan_req_s fip_vlan_req_tmpl = {
>
> static const?
>
> > + .eth = {.dmac = FCOE_ALL_FCFS_MAC,
> > + .eth_type = FIP_ETH_TYPE_LE},
> > + .fip = {.ver = 0x10,
> > + .protocol = FIP_VLAN_DISC << 8,
> > + .subcode = FIP_SUBCODE_REQ << 8,
> > + .desc_len = 2 << 8},
> > + .mac_desc = {.type = FIP_TYPE_MAC, .len = 2}
> > +};
> > +
> > +struct fip_vlan_notif_s {
> > + struct fip_header_s fip;
> > + struct fip_vlan_desc_s vlans_desc[];
> > +} __packed;
> > +
> > +struct fip_vn_port_desc_s {
> > + uint8_t type;
> > + uint8_t len;
> > + uint8_t vn_port_mac[6];
> > + uint8_t rsvd[1];
> > + uint8_t vn_port_id[3];
> > + uint64_t vn_port_name;
> > +} __packed;
> > +
> > +struct fip_vn_port_ka_s {
> > + struct eth_hdr_s eth;
> > + struct fip_header_s fip;
> > + struct fip_mac_desc_s mac_desc;
> > + struct fip_vn_port_desc_s vn_port_desc;
> > +} __packed;
> > +
> > +/*
> > + * Variables:
> > + * fcf_mac, eth.smac, mac_desc.enode_mac
> > + * vn_port_desc:mac, id, port_name
> > + */
> > +struct fip_vn_port_ka_s fip_vn_port_ka_tmpl = {
> > + .eth = {
> > + .eth_type = FIP_ETH_TYPE_LE},
> > + .fip = {
> > + .ver = 0x10,
> > + .protocol = FIP_KA_CVL << 8,
> > + .subcode = FIP_SUBCODE_REQ << 8,
> > + .desc_len = 7 << 8},
> > + .mac_desc = {.type = FIP_TYPE_MAC, .len = 2},
> > + .vn_port_desc = {.type = FIP_TYPE_VX_PORT, .len = 5}
> > +};
> > +
> > +struct fip_enode_ka_s {
> > + struct eth_hdr_s eth;
> > + struct fip_header_s fip;
> > + struct fip_mac_desc_s mac_desc;
> > +} __packed;
> > +
> > +/*
> > + * Variables:
> > + * fcf_mac, eth.smac, mac_desc.enode_mac
> > + */
> > +struct fip_enode_ka_s fip_enode_ka_tmpl = {
> > + .eth = {
> > + .eth_type = FIP_ETH_TYPE_LE},
> > + .fip = {
> > + .ver = 0x10,
> > + .protocol = FIP_KA_CVL << 8,
> > + .subcode = FIP_SUBCODE_REQ << 8,
> > + .desc_len = 2 << 8},
> > + .mac_desc = {.type = FIP_TYPE_MAC, .len = 2}
> > +};
> > +
> > +struct fip_name_desc_s {
> > + uint8_t type;
> > + uint8_t len;
> > + uint8_t rsvd[2];
> > + uint64_t name;
> > +} __packed;
> > +
> > +struct fip_cvl_s {
> > + struct fip_header_s fip;
> > + struct fip_mac_desc_s fcf_mac_desc;
> > + struct fip_name_desc_s name_desc;
> > + struct fip_vn_port_desc_s vn_ports_desc[];
> > +} __packed;
> > +
> > +struct fip_flogi_desc_s {
> > + uint8_t type;
> > + uint8_t len;
> > + uint16_t rsvd;
> > + struct fc_els_s flogi;
> > +} __packed;
> > +
> > +struct fip_flogi_rsp_desc_s {
> > + uint8_t type;
> > + uint8_t len;
> > + uint16_t rsvd;
> > + struct fc_els_s els;
> > +} __packed;
> > +
> > +struct fip_flogi_s {
> > + struct eth_hdr_s eth;
> > + struct fip_header_s fip;
> > + struct fip_flogi_desc_s flogi_desc;
> > + struct fip_mac_desc_s mac_desc;
> > +} __packed;
> > +
> > +struct fip_flogi_rsp_s {
> > + struct fip_header_s fip;
> > + struct fip_flogi_rsp_desc_s rsp_desc;
> > + struct fip_mac_desc_s mac_desc;
> > +} __packed;
> > +
> > +/*
> > + * Variables:
> > + * fcf_mac, eth.smac, mac_desc.enode_mac
> > + */
> > +struct fip_flogi_s fip_flogi_tmpl = {
> > + .eth = {
> > + .eth_type = FIP_ETH_TYPE_LE},
> > + .fip = {
> > + .ver = 0x10,
> > + .protocol = FIP_FLOGI << 8,
> > + .subcode = FIP_SUBCODE_REQ << 8,
> > + .desc_len = 38 << 8,
> > + .flags = 0x80},
> > + .flogi_desc = {
> > + .type = FIP_TYPE_FLOGI, .len = 36,
> > + .flogi = {
> > + .fchdr = {
> > + .r_ctl = 0x22,
> > + .did = {0xFF, 0xFF, 0xFE},
> > + .type = 0x01,
> > + .f_ctl = FNIC_ELS_REQ_FCTL,
> > + .ox_id = FNIC_FLOGI_OXID,
> > + .rx_id = 0xFFFF},
> > + .command = FC_ELS_FLOGI_REQ,
> > + .u.csp_flogi = {
> > + .fc_ph_ver = FNIC_FC_PH_VER,
> > + .b2b_credits =
> > + FNIC_FC_B2B_CREDIT,
> > + .b2b_rdf_size =
> > + FNIC_FC_B2B_RDF_SZ},
> > + .spc3 = {0x88, 0x00}
> > + }
> > + },
> > + .mac_desc = {.type = FIP_TYPE_MAC, .len = 2}
> > +};
> > +
> > +struct fip_fcoe_desc_s {
> > + uint8_t type;
> > + uint8_t len;
> > + uint16_t max_fcoe_size;
> > +} __packed;
> > +
> > +struct fip_discovery_s {
> > + struct eth_hdr_s eth;
> > + struct fip_header_s fip;
> > + struct fip_mac_desc_s mac_desc;
> > + struct fip_name_desc_s name_desc;
> > + struct fip_fcoe_desc_s fcoe_desc;
> > +} __packed;
> > +
> > +/*
> > + * Variables:
> > + * eth.smac, mac_desc.enode_mac, node_name
> > + */
> > +struct fip_discovery_s fip_discovery_tmpl = {
> > + .eth = {.dmac = FCOE_ALL_FCFS_MAC,
> > + .eth_type = FIP_ETH_TYPE_LE},
> > + .fip = {
> > + .ver = 0x10, .protocol = FIP_DISCOVERY << 8,
> > + .subcode = FIP_SUBCODE_REQ << 8, .desc_len = 6 << 8,
> > + .flags = 0x80},
> > + .mac_desc = {.type = FIP_TYPE_MAC, .len = 2},
> > + .name_desc = {.type = FIP_TYPE_NAME_ID, .len = 3},
> > + .fcoe_desc = {
> > + .type = FIP_TYPE_MAX_FCOE, .len = 1,
> > + .max_fcoe_size = FCOE_MAX_SIZE_LE}
> > +};
> > +
> > +struct fip_prio_desc_s {
> > + uint8_t type;
> > + uint8_t len;
> > + uint8_t rsvd;
> > + uint8_t priority;
> > +} __packed;
> > +
> > +struct fip_fabric_desc_s {
> > + uint8_t type;
> > + uint8_t len;
> > + uint16_t vf_id;
> > + uint8_t rsvd;
> > + uint8_t fc_map[3];
> > + uint64_t fabric_name;
> > +} __packed;
> > +
> > +struct fip_fka_adv_desc_s {
> > + uint8_t type;
> > + uint8_t len;
> > + uint8_t rsvd;
> > + uint8_t rsvd_D;
> > + uint32_t fka_adv;
> > +} __packed;
> > +
> > +struct fip_disc_adv_s {
> > + struct fip_header_s fip;
> > + struct fip_prio_desc_s prio_desc;
> > + struct fip_mac_desc_s mac_desc;
> > + struct fip_name_desc_s name_desc;
> > + struct fip_fabric_desc_s fabric_desc;
> > + struct fip_fka_adv_desc_s fka_adv_desc;
> > +} __packed;
> > +
> > +void fnic_fcoe_process_vlan_resp(struct fnic *fnic,
> > + struct fip_header_s *fiph);
> > +void fnic_fcoe_fip_discovery_resp(struct fnic *fnic,
> > + struct fip_header_s *fiph);
> > +void fnic_fcoe_process_flogi_resp(struct fnic *fnic,
> > + struct fip_header_s *fiph);
> > +void fnic_work_on_fip_timer(struct work_struct *work);
> > +void fnic_work_on_fcs_ka_timer(struct work_struct *work);
> > +void fnic_fcoe_send_vlan_req(struct fnic *fnic);
> > +void fnic_fcoe_start_fcf_discovery(struct fnic *fnic);
> > +void fnic_fcoe_start_flogi(struct fnic *fnic);
> > +void fnic_fcoe_process_cvl(struct fnic *fnic,
> > + struct fip_header_s *fiph);
> > +void fnic_vlan_discovery_timeout(struct fnic *fnic);
> > +
> > +#endif /* _FIP_H_ */
> > diff --git a/drivers/scsi/fnic/fnic.h b/drivers/scsi/fnic/fnic.h
> > index 7d7009197dbc..0c7926627663 100644
> > --- a/drivers/scsi/fnic/fnic.h
> > +++ b/drivers/scsi/fnic/fnic.h
> > @@ -230,6 +230,12 @@ do { \
> > "fnic<%d>: %s: %d: " fmt, fnic_num,\
> > __func__, __LINE__, ##args);)
> >
> > +#define FNIC_FIP_DBG(kern_level, host, fnic_num, fmt, args...) \
> > + FNIC_CHECK_LOGGING(FNIC_FCS_LOGGING, \
> > + shost_printk(kern_level, host, \
> > + "fnic<%d>: %s: %d: " fmt, fnic_num,\
> > + __func__, __LINE__, ##args);)
> > +
> > #define FNIC_SCSI_DBG(kern_level, host, fnic_num, fmt, args...) \
> > FNIC_CHECK_LOGGING(FNIC_SCSI_LOGGING, \
> > shost_printk(kern_level, host, \
> > @@ -406,13 +412,15 @@ struct fnic {
> > /*** FIP related data members -- start ***/
> > void (*set_vlan)(struct fnic *, u16 vlan);
> > struct work_struct fip_frame_work;
> > - struct sk_buff_head fip_frame_queue;
> > + struct work_struct fip_timer_work;
> > + struct list_head fip_frame_queue;
> > struct timer_list fip_timer;
> > - struct list_head vlans;
> > spinlock_t vlans_lock;
> > -
> > - struct work_struct event_work;
> > - struct list_head evlist;
> > + struct timer_list retry_fip_timer;
> > + struct timer_list fcs_ka_timer;
> > + struct timer_list enode_ka_timer;
> > + struct timer_list vn_ka_timer;
> > + struct list_head vlan_list;
> > /*** FIP related data members -- end ***/
> >
> > /* copy work queue cache line section */
> > @@ -462,9 +470,6 @@ int fnic_rq_cmpl_handler(struct fnic *fnic, int);
> > int fnic_alloc_rq_frame(struct vnic_rq *rq);
> > void fnic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf);
> > void fnic_flush_tx(struct work_struct *work);
> > -void fnic_eth_send(struct fcoe_ctlr *, struct sk_buff *skb);
> > -void fnic_set_port_id(struct fc_lport *, u32, struct fc_frame *);
> > -void fnic_update_mac(struct fc_lport *, u8 *new);
> > void fnic_update_mac_locked(struct fnic *, u8 *new);
> >
> > int fnic_queuecommand(struct Scsi_Host *, struct scsi_cmnd *);
> > @@ -493,7 +498,7 @@ int fnic_is_abts_pending(struct fnic *, struct scsi_cmnd *);
> > void fnic_handle_fip_frame(struct work_struct *work);
> > void fnic_handle_fip_event(struct fnic *fnic);
> > void fnic_fcoe_reset_vlans(struct fnic *fnic);
> > -void fnic_fcoe_evlist_free(struct fnic *fnic);
> > +extern void fnic_handle_fip_timer(struct timer_list *t);
> >
> > static inline int
> > fnic_chk_state_flags_locked(struct fnic *fnic, unsigned long st_flags)
> > diff --git a/drivers/scsi/fnic/fnic_fcs.c b/drivers/scsi/fnic/fnic_fcs.c
> > index 90d0c4c8920c..8a7c471d3ff5 100644
> > --- a/drivers/scsi/fnic/fnic_fcs.c
> > +++ b/drivers/scsi/fnic/fnic_fcs.c
> > @@ -25,16 +25,9 @@
> > #include "cq_enet_desc.h"
> > #include "cq_exch_desc.h"
> >
> > -static u8 fcoe_all_fcfs[ETH_ALEN] = FIP_ALL_FCF_MACS;
> > -struct workqueue_struct *fnic_fip_queue;
> > +extern struct workqueue_struct *fnic_fip_queue;
> > struct workqueue_struct *fnic_event_queue;
> >
> > -static void fnic_set_eth_mode(struct fnic *);
> > -static void fnic_fcoe_start_fcf_disc(struct fnic *fnic);
> > -static void fnic_fcoe_process_vlan_resp(struct fnic *fnic, struct sk_buff *);
> > -static int fnic_fcoe_vlan_check(struct fnic *fnic, u16 flag);
> > -static int fnic_fcoe_handle_fip_frame(struct fnic *fnic, struct sk_buff *skb);
> > -
> > /* Frame initialization */
> > /*
> > * Variables:
> > @@ -252,11 +245,6 @@ void fnic_handle_link(struct work_struct *work)
> > fnic->lport->host->host_no, FNIC_FC_LE,
> > "Link Status: UP_DOWN",
> > strlen("Link Status: UP_DOWN"));
> > - if (fnic->config.flags & VFCF_FIP_CAPABLE) {
> > - FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,
> > - "deleting fip-timer during link-down\n");
> > - del_timer_sync(&fnic->fip_timer);
> > - }
> > fcoe_ctlr_link_down(&fnic->ctlr);
> > }
> >
> > @@ -299,496 +287,73 @@ void fnic_handle_frame(struct work_struct *work)
> > }
> > }
> >
> > -void fnic_fcoe_evlist_free(struct fnic *fnic)
> > -{
> > - struct fnic_event *fevt = NULL;
> > - struct fnic_event *next = NULL;
> > - unsigned long flags;
> > -
> > - spin_lock_irqsave(&fnic->fnic_lock, flags);
> > - if (list_empty(&fnic->evlist)) {
> > - spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> > - return;
> > - }
> > -
> > - list_for_each_entry_safe(fevt, next, &fnic->evlist, list) {
> > - list_del(&fevt->list);
> > - kfree(fevt);
> > - }
> > - spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> > -}
> > -
> > -void fnic_handle_event(struct work_struct *work)
> > +void fnic_handle_fip_frame(struct work_struct *work)
> > {
> > - struct fnic *fnic = container_of(work, struct fnic, event_work);
> > - struct fnic_event *fevt = NULL;
> > - struct fnic_event *next = NULL;
> > - unsigned long flags;
> > + struct fnic_stats *fnic_stats;
> > + struct fnic_frame_list *cur_frame, *next;
> > + struct fnic *fnic = container_of(work, struct fnic, fip_frame_work);
> >
> > - spin_lock_irqsave(&fnic->fnic_lock, flags);
> > - if (list_empty(&fnic->evlist)) {
> > - spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> > - return;
> > - }
> > + fnic_stats = &fnic->fnic_stats;
> > + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "Processing FIP frame\n");
> >
> > - list_for_each_entry_safe(fevt, next, &fnic->evlist, list) {
> > + spin_lock_irqsave(&fnic->fnic_lock, fnic->lock_flags);
> > + list_for_each_entry_safe(cur_frame, next, &fnic->fip_frame_queue,
> > + links) {
> > if (fnic->stop_rx_link_events) {
> > - list_del(&fevt->list);
> > - kfree(fevt);
> > - spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> > + list_del(&cur_frame->links);
> > + spin_unlock_irqrestore(&fnic->fnic_lock, fnic->lock_flags);
> > + kfree(cur_frame->fp);
> > + kfree(cur_frame);
> > return;
> > }
> > +
> > /*
> > * If we're in a transitional state, just re-queue and return.
> > * The queue will be serviced when we get to a stable state.
> > */
> > if (fnic->state != FNIC_IN_FC_MODE &&
> > - fnic->state != FNIC_IN_ETH_MODE) {
> > - spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> > + fnic->state != FNIC_IN_ETH_MODE) {
> > + spin_unlock_irqrestore(&fnic->fnic_lock, fnic->lock_flags);
> > return;
> > }
> >
> > - list_del(&fevt->list);
> > - switch (fevt->event) {
> > - case FNIC_EVT_START_VLAN_DISC:
> > - spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> > - fnic_fcoe_send_vlan_req(fnic);
> > - spin_lock_irqsave(&fnic->fnic_lock, flags);
> > - break;
> > - case FNIC_EVT_START_FCF_DISC:
> > - FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,
> > - "Start FCF Discovery\n");
> > - fnic_fcoe_start_fcf_disc(fnic);
> > - break;
> > - default:
> > - FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,
> > - "Unknown event 0x%x\n", fevt->event);
> > - break;
> > - }
> > - kfree(fevt);
> > - }
> > - spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> > -}
> > -
> > -/**
> > - * is_fnic_fip_flogi_reject() - Check if the Received FIP FLOGI frame is rejected
> > - * @fip: The FCoE controller that received the frame
> > - * @skb: The received FIP frame
> > - *
> > - * Returns non-zero if the frame is rejected with unsupported cmd with
> > - * insufficient resource els explanation.
> > - */
> > -static inline int is_fnic_fip_flogi_reject(struct fcoe_ctlr *fip,
> > - struct sk_buff *skb)
> > -{
> > - struct fc_lport *lport = fip->lp;
> > - struct fip_header *fiph;
> > - struct fc_frame_header *fh = NULL;
> > - struct fip_desc *desc;
> > - struct fip_encaps *els;
> > - u16 op;
> > - u8 els_op;
> > - u8 sub;
> > -
> > - size_t rlen;
> > - size_t dlen = 0;
> > -
> > - if (skb_linearize(skb))
> > - return 0;
> > -
> > - if (skb->len < sizeof(*fiph))
> > - return 0;
> > -
> > - fiph = (struct fip_header *)skb->data;
> > - op = ntohs(fiph->fip_op);
> > - sub = fiph->fip_subcode;
> > -
> > - if (op != FIP_OP_LS)
> > - return 0;
> > -
> > - if (sub != FIP_SC_REP)
> > - return 0;
> > -
> > - rlen = ntohs(fiph->fip_dl_len) * 4;
> > - if (rlen + sizeof(*fiph) > skb->len)
> > - return 0;
> > -
> > - desc = (struct fip_desc *)(fiph + 1);
> > - dlen = desc->fip_dlen * FIP_BPW;
> > -
> > - if (desc->fip_dtype == FIP_DT_FLOGI) {
> > -
> > - if (dlen < sizeof(*els) + sizeof(*fh) + 1)
> > - return 0;
> > -
> > - els = (struct fip_encaps *)desc;
> > - fh = (struct fc_frame_header *)(els + 1);
> > -
> > - if (!fh)
> > - return 0;
> > -
> > - /*
> > - * ELS command code, reason and explanation should be = Reject,
> > - * unsupported command and insufficient resource
> > - */
> > - els_op = *(u8 *)(fh + 1);
> > - if (els_op == ELS_LS_RJT) {
> > - shost_printk(KERN_INFO, lport->host,
> > - "Flogi Request Rejected by Switch\n");
> > - return 1;
> > - }
> > - shost_printk(KERN_INFO, lport->host,
> > - "Flogi Request Accepted by Switch\n");
> > - }
> > - return 0;
> > -}
> > -
> > -void fnic_fcoe_send_vlan_req(struct fnic *fnic)
>
> why is so much being deleted?
The fnic driver, with this change, will be more reliant on FDLS functionality.
These changes are obsolete due to that.
> > -{
> > - struct fcoe_ctlr *fip = &fnic->ctlr;
> > - struct fnic_stats *fnic_stats = &fnic->fnic_stats;
> > - struct sk_buff *skb;
> > - char *eth_fr;
> > - struct fip_vlan *vlan;
> > - u64 vlan_tov;
> > -
> > - fnic_fcoe_reset_vlans(fnic);
> > - fnic->set_vlan(fnic, 0);
> > -
> > - if (printk_ratelimit())
> > - FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > - "Sending VLAN request...\n");
> > -
> > - skb = dev_alloc_skb(sizeof(struct fip_vlan));
> > - if (!skb)
> > - return;
> > -
> > - eth_fr = (char *)skb->data;
> > - vlan = (struct fip_vlan *)eth_fr;
> > -
> > - memset(vlan, 0, sizeof(*vlan));
> > - memcpy(vlan->eth.h_source, fip->ctl_src_addr, ETH_ALEN);
> > - memcpy(vlan->eth.h_dest, fcoe_all_fcfs, ETH_ALEN);
> > - vlan->eth.h_proto = htons(ETH_P_FIP);
> > -
> > - vlan->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
> > - vlan->fip.fip_op = htons(FIP_OP_VLAN);
> > - vlan->fip.fip_subcode = FIP_SC_VL_REQ;
> > - vlan->fip.fip_dl_len = htons(sizeof(vlan->desc) / FIP_BPW);
> > -
> > - vlan->desc.mac.fd_desc.fip_dtype = FIP_DT_MAC;
> > - vlan->desc.mac.fd_desc.fip_dlen = sizeof(vlan->desc.mac) / FIP_BPW;
> > - memcpy(&vlan->desc.mac.fd_mac, fip->ctl_src_addr, ETH_ALEN);
> > -
> > - vlan->desc.wwnn.fd_desc.fip_dtype = FIP_DT_NAME;
> > - vlan->desc.wwnn.fd_desc.fip_dlen = sizeof(vlan->desc.wwnn) / FIP_BPW;
> > - put_unaligned_be64(fip->lp->wwnn, &vlan->desc.wwnn.fd_wwn);
> > - atomic64_inc(&fnic_stats->vlan_stats.vlan_disc_reqs);
> > -
> > - skb_put(skb, sizeof(*vlan));
> > - skb->protocol = htons(ETH_P_FIP);
> > - skb_reset_mac_header(skb);
> > - skb_reset_network_header(skb);
> > - fip->send(fip, skb);
> > -
> > - /* set a timer so that we can retry if there no response */
> > - vlan_tov = jiffies + msecs_to_jiffies(FCOE_CTLR_FIPVLAN_TOV);
> > - mod_timer(&fnic->fip_timer, round_jiffies(vlan_tov));
> > -}
> > -
> > -static void fnic_fcoe_process_vlan_resp(struct fnic *fnic, struct sk_buff *skb)
> > -{
> > - struct fcoe_ctlr *fip = &fnic->ctlr;
> > - struct fip_header *fiph;
> > - struct fip_desc *desc;
> > - struct fnic_stats *fnic_stats = &fnic->fnic_stats;
> > - u16 vid;
> > - size_t rlen;
> > - size_t dlen;
> > - struct fcoe_vlan *vlan;
> > - u64 sol_time;
> > - unsigned long flags;
> > -
> > - FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > - "Received VLAN response...\n");
> > -
> > - fiph = (struct fip_header *) skb->data;
> > -
> > - FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > - "Received VLAN response... OP 0x%x SUB_OP 0x%x\n",
> > - ntohs(fiph->fip_op), fiph->fip_subcode);
> > -
> > - rlen = ntohs(fiph->fip_dl_len) * 4;
> > - fnic_fcoe_reset_vlans(fnic);
> > - spin_lock_irqsave(&fnic->vlans_lock, flags);
> > - desc = (struct fip_desc *)(fiph + 1);
> > - while (rlen > 0) {
> > - dlen = desc->fip_dlen * FIP_BPW;
> > - switch (desc->fip_dtype) {
> > - case FIP_DT_VLAN:
> > - vid = ntohs(((struct fip_vlan_desc *)desc)->fd_vlan);
> > - shost_printk(KERN_INFO, fnic->lport->host,
> > - "process_vlan_resp: FIP VLAN %d\n", vid);
> > - vlan = kzalloc(sizeof(*vlan), GFP_ATOMIC);
> > - if (!vlan) {
> > - /* retry from timer */
> > - spin_unlock_irqrestore(&fnic->vlans_lock,
> > - flags);
> > - goto out;
> > - }
> > - vlan->vid = vid & 0x0fff;
> > - vlan->state = FIP_VLAN_AVAIL;
> > - list_add_tail(&vlan->list, &fnic->vlans);
> > - break;
> > - }
> > - desc = (struct fip_desc *)((char *)desc + dlen);
> > - rlen -= dlen;
> > - }
> > -
> > - /* any VLAN descriptors present ? */
> > - if (list_empty(&fnic->vlans)) {
> > - /* retry from timer */
> > - atomic64_inc(&fnic_stats->vlan_stats.resp_withno_vlanID);
> > - FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > - "No VLAN descriptors in FIP VLAN response\n");
> > - spin_unlock_irqrestore(&fnic->vlans_lock, flags);
> > - goto out;
> > - }
> > -
> > - vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
> > - fnic->set_vlan(fnic, vlan->vid);
> > - vlan->state = FIP_VLAN_SENT; /* sent now */
> > - vlan->sol_count++;
> > - spin_unlock_irqrestore(&fnic->vlans_lock, flags);
> > -
> > - /* start the solicitation */
> > - fcoe_ctlr_link_up(fip);
> > -
> > - sol_time = jiffies + msecs_to_jiffies(FCOE_CTLR_START_DELAY);
> > - mod_timer(&fnic->fip_timer, round_jiffies(sol_time));
> > -out:
> > - return;
> > -}
> > -
> > -static void fnic_fcoe_start_fcf_disc(struct fnic *fnic)
> > -{
> > - unsigned long flags;
> > - struct fcoe_vlan *vlan;
> > - u64 sol_time;
> > -
> > - spin_lock_irqsave(&fnic->vlans_lock, flags);
> > - vlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
> > - fnic->set_vlan(fnic, vlan->vid);
> > - vlan->state = FIP_VLAN_SENT; /* sent now */
> > - vlan->sol_count = 1;
> > - spin_unlock_irqrestore(&fnic->vlans_lock, flags);
> > -
> > - /* start the solicitation */
> > - fcoe_ctlr_link_up(&fnic->ctlr);
> > -
> > - sol_time = jiffies + msecs_to_jiffies(FCOE_CTLR_START_DELAY);
> > - mod_timer(&fnic->fip_timer, round_jiffies(sol_time));
> > -}
> > -
> > -static int fnic_fcoe_vlan_check(struct fnic *fnic, u16 flag)
> > -{
> > - unsigned long flags;
> > - struct fcoe_vlan *fvlan;
> > -
> > - spin_lock_irqsave(&fnic->vlans_lock, flags);
> > - if (list_empty(&fnic->vlans)) {
> > - spin_unlock_irqrestore(&fnic->vlans_lock, flags);
> > - return -EINVAL;
> > - }
> > -
> > - fvlan = list_first_entry(&fnic->vlans, struct fcoe_vlan, list);
> > - if (fvlan->state == FIP_VLAN_USED) {
> > - spin_unlock_irqrestore(&fnic->vlans_lock, flags);
> > - return 0;
> > - }
> > -
> > - if (fvlan->state == FIP_VLAN_SENT) {
> > - fvlan->state = FIP_VLAN_USED;
> > - spin_unlock_irqrestore(&fnic->vlans_lock, flags);
> > - return 0;
> > - }
> > - spin_unlock_irqrestore(&fnic->vlans_lock, flags);
> > - return -EINVAL;
> > -}
> > -
> > -static void fnic_event_enq(struct fnic *fnic, enum fnic_evt ev)
> > -{
> > - struct fnic_event *fevt;
> > - unsigned long flags;
>
> it's very hard to review so much code being deleted....
I understand John. Thanks for your patience and time in reviewing
this large set of changes.
> > -
> > - fevt = kmalloc(sizeof(*fevt), GFP_ATOMIC);
> > - if (!fevt)
> > - return;
> > -
> > - fevt->fnic = fnic;
> > - fevt->event = ev;
> > -
> > - spin_lock_irqsave(&fnic->fnic_lock, flags);
> > - list_add_tail(&fevt->list, &fnic->evlist);
> > - spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> > -
> > - schedule_work(&fnic->event_work);
> > -}
> > -
> > -static int fnic_fcoe_handle_fip_frame(struct fnic *fnic, struct sk_buff *skb)
> > -{
> > - struct fip_header *fiph;
> > - int ret = 1;
> > - u16 op;
> > - u8 sub;
> > -
> > - if (!skb || !(skb->data))
> > - return -1;
> > -
> > - if (skb_linearize(skb))
> > - goto drop;
> > -
> > - fiph = (struct fip_header *)skb->data;
> > - op = ntohs(fiph->fip_op);
> > - sub = fiph->fip_subcode;
> > -
> > - if (FIP_VER_DECAPS(fiph->fip_ver) != FIP_VER)
> > - goto drop;
> > -
> > - if (ntohs(fiph->fip_dl_len) * FIP_BPW + sizeof(*fiph) > skb->len)
> > - goto drop;
> > -
> > - if (op == FIP_OP_DISC && sub == FIP_SC_ADV) {
> > - if (fnic_fcoe_vlan_check(fnic, ntohs(fiph->fip_flags)))
> > - goto drop;
> > - /* pass it on to fcoe */
> > - ret = 1;
> > - } else if (op == FIP_OP_VLAN && sub == FIP_SC_VL_NOTE) {
> > - /* set the vlan as used */
> > - fnic_fcoe_process_vlan_resp(fnic, skb);
> > - ret = 0;
> > - } else if (op == FIP_OP_CTRL && sub == FIP_SC_CLR_VLINK) {
> > - /* received CVL request, restart vlan disc */
> > - fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
> > - /* pass it on to fcoe */
> > - ret = 1;
> > - }
> > -drop:
> > - return ret;
> > -}
> > -
> > -void fnic_handle_fip_frame(struct work_struct *work)
> > -{
> > - struct fnic *fnic = container_of(work, struct fnic, fip_frame_work);
> > - struct fnic_stats *fnic_stats = &fnic->fnic_stats;
> > - unsigned long flags;
> > - struct sk_buff *skb;
> > - struct ethhdr *eh;
> > + list_del(&cur_frame->links);
> >
> > - while ((skb = skb_dequeue(&fnic->fip_frame_queue))) {
> > - spin_lock_irqsave(&fnic->fnic_lock, flags);
> > - if (fnic->stop_rx_link_events) {
> > - spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> > - dev_kfree_skb(skb);
> > - return;
> > - }
> > - /*
> > - * If we're in a transitional state, just re-queue and return.
> > - * The queue will be serviced when we get to a stable state.
> > - */
> > - if (fnic->state != FNIC_IN_FC_MODE &&
> > - fnic->state != FNIC_IN_ETH_MODE) {
> > - skb_queue_head(&fnic->fip_frame_queue, skb);
> > - spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> > - return;
> > - }
> > - spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> > - eh = (struct ethhdr *)skb->data;
> > - if (eh->h_proto == htons(ETH_P_FIP)) {
> > - skb_pull(skb, sizeof(*eh));
> > - if (fnic_fcoe_handle_fip_frame(fnic, skb) <= 0) {
> > - dev_kfree_skb(skb);
> > - continue;
> > - }
> > - /*
> > - * If there's FLOGI rejects - clear all
> > - * fcf's & restart from scratch
> > - */
> > - if (is_fnic_fip_flogi_reject(&fnic->ctlr, skb)) {
> > - atomic64_inc(
> > - &fnic_stats->vlan_stats.flogi_rejects);
> > - shost_printk(KERN_INFO, fnic->lport->host,
> > - "Trigger a Link down - VLAN Disc\n");
> > - fcoe_ctlr_link_down(&fnic->ctlr);
> > - /* start FCoE VLAN discovery */
> > - fnic_fcoe_send_vlan_req(fnic);
> > - dev_kfree_skb(skb);
> > - continue;
> > - }
> > - fcoe_ctlr_recv(&fnic->ctlr, skb);
> > - continue;
> > + if (fdls_fip_recv_frame(fnic, cur_frame->fp)) {
> > + kfree(cur_frame->fp);
> > + kfree(cur_frame);
> > }
> > }
> > + spin_unlock_irqrestore(&fnic->fnic_lock, fnic->lock_flags);
> > }
> >
> > /**
> > * fnic_import_rq_eth_pkt() - handle received FCoE or FIP frame.
> > * @fnic: fnic instance.
> > - * @skb: Ethernet Frame.
> > + * @fp: Ethernet Frame.
> > */
> > -static inline int fnic_import_rq_eth_pkt(struct fnic *fnic, struct sk_buff *skb)
> > +static inline int fnic_import_rq_eth_pkt(struct fnic *fnic, void *fp)
> > {
> > - struct fc_frame *fp;
> > - struct ethhdr *eh;
> > - struct fcoe_hdr *fcoe_hdr;
> > - struct fcoe_crc_eof *ft;
> > + struct fnic_eth_hdr_s *eh;
> > + struct fnic_frame_list *fip_fr_elem;
> > + unsigned long flags;
> >
> > - /*
> > - * Undo VLAN encapsulation if present.
> > - */
> > - eh = (struct ethhdr *)skb->data;
> > - if (eh->h_proto == htons(ETH_P_8021Q)) {
> > - memmove((u8 *)eh + VLAN_HLEN, eh, ETH_ALEN * 2);
> > - eh = skb_pull(skb, VLAN_HLEN);
> > - skb_reset_mac_header(skb);
> > - }
> > - if (eh->h_proto == htons(ETH_P_FIP)) {
> > - if (!(fnic->config.flags & VFCF_FIP_CAPABLE)) {
> > - printk(KERN_ERR "Dropped FIP frame, as firmware "
> > - "uses non-FIP mode, Enable FIP "
> > - "using UCSM\n");
> > - goto drop;
> > - }
> > - if ((fnic_fc_trace_set_data(fnic->lport->host->host_no,
> > - FNIC_FC_RECV|0x80, (char *)skb->data, skb->len)) != 0) {
> > - printk(KERN_ERR "fnic ctlr frame trace error!!!");
> > - }
> > - skb_queue_tail(&fnic->fip_frame_queue, skb);
> > + eh = (struct fnic_eth_hdr_s *) fp;
> > + if ((eh->ether_type == htons(ETH_TYPE_FIP)) && (fnic->iport.usefip)) {
> > + fip_fr_elem = (struct fnic_frame_list *)
> > + kmalloc(sizeof(struct fnic_frame_list), GFP_ATOMIC);
> > + if (!fip_fr_elem)
> > + return 0;
> > + memset(fip_fr_elem, 0, sizeof(struct fnic_frame_list));
> > + fip_fr_elem->fp = fp;
> > + spin_lock_irqsave(&fnic->fnic_lock, flags);
> > + list_add_tail(&fip_fr_elem->links, &fnic->fip_frame_queue);
> > + spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> > queue_work(fnic_fip_queue, &fnic->fip_frame_work);
> > - return 1; /* let caller know packet was used */
> > - }
> > - if (eh->h_proto != htons(ETH_P_FCOE))
> > - goto drop;
> > - skb_set_network_header(skb, sizeof(*eh));
> > - skb_pull(skb, sizeof(*eh));
> > -
> > - fcoe_hdr = (struct fcoe_hdr *)skb->data;
> > - if (FC_FCOE_DECAPS_VER(fcoe_hdr) != FC_FCOE_VER)
> > - goto drop;
> > -
> > - fp = (struct fc_frame *)skb;
> > - fc_frame_init(fp);
> > - fr_sof(fp) = fcoe_hdr->fcoe_sof;
> > - skb_pull(skb, sizeof(struct fcoe_hdr));
> > - skb_reset_transport_header(skb);
> > -
> > - ft = (struct fcoe_crc_eof *)(skb->data + skb->len - sizeof(*ft));
> > - fr_eof(fp) = ft->fcoe_eof;
> > - skb_trim(skb, skb->len - sizeof(*ft));
> > - return 0;
> > -drop:
> > - dev_kfree_skb_irq(skb);
> > - return -1;
> > + return 1; /* let caller know packet was used */
> > + } else
> > + return 0;
> > }
> >
> > /**
> > @@ -800,206 +365,146 @@ static inline int fnic_import_rq_eth_pkt(struct fnic *fnic, struct sk_buff *skb)
> > */
> > void fnic_update_mac_locked(struct fnic *fnic, u8 *new)
> > {
> > - u8 *ctl = fnic->ctlr.ctl_src_addr;
> > + struct fnic_iport_s *iport = &fnic->iport;
> > + u8 *ctl = iport->hwmac;
> > u8 *data = fnic->data_src_addr;
> >
> > if (is_zero_ether_addr(new))
> > new = ctl;
> > if (ether_addr_equal(data, new))
> > return;
> > - FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,
> > - "update_mac %pM\n", new);
> > +
> > + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "Update MAC: %u\n", *new);
> > +
> > if (!is_zero_ether_addr(data) && !ether_addr_equal(data, ctl))
> > vnic_dev_del_addr(fnic->vdev, data);
> > +
> > memcpy(data, new, ETH_ALEN);
> > if (!ether_addr_equal(new, ctl))
> > vnic_dev_add_addr(fnic->vdev, new);
> > }
> >
> > -/**
> > - * fnic_update_mac() - set data MAC address and filters.
> > - * @lport: local port.
> > - * @new: newly-assigned FCoE MAC address.
> > - */
> > -void fnic_update_mac(struct fc_lport *lport, u8 *new)
> > -{
> > - struct fnic *fnic = lport_priv(lport);
> > -
> > - spin_lock_irq(&fnic->fnic_lock);
> > - fnic_update_mac_locked(fnic, new);
> > - spin_unlock_irq(&fnic->fnic_lock);
> > -}
> > -
> > -/**
> > - * fnic_set_port_id() - set the port_ID after successful FLOGI.
> > - * @lport: local port.
> > - * @port_id: assigned FC_ID.
> > - * @fp: received frame containing the FLOGI accept or NULL.
> > - *
> > - * This is called from libfc when a new FC_ID has been assigned.
> > - * This causes us to reset the firmware to FC_MODE and setup the new MAC
> > - * address and FC_ID.
> > - *
> > - * It is also called with FC_ID 0 when we're logged off.
> > - *
> > - * If the FC_ID is due to point-to-point, fp may be NULL.
> > - */
> > -void fnic_set_port_id(struct fc_lport *lport, u32 port_id, struct fc_frame *fp)
> > -{
> > - struct fnic *fnic = lport_priv(lport);
> > - u8 *mac;
> > - int ret;
> > -
> > - FNIC_FCS_DBG(KERN_DEBUG, lport->host, fnic->fnic_num,
> > - "set port_id 0x%x fp 0x%p\n",
> > - port_id, fp);
> > -
> > - /*
> > - * If we're clearing the FC_ID, change to use the ctl_src_addr.
> > - * Set ethernet mode to send FLOGI.
> > - */
> > - if (!port_id) {
> > - fnic_update_mac(lport, fnic->ctlr.ctl_src_addr);
> > - fnic_set_eth_mode(fnic);
> > - return;
> > - }
> > -
> > - if (fp) {
> > - mac = fr_cb(fp)->granted_mac;
> > - if (is_zero_ether_addr(mac)) {
> > - /* non-FIP - FLOGI already accepted - ignore return */
> > - fcoe_ctlr_recv_flogi(&fnic->ctlr, lport, fp);
> > - }
> > - fnic_update_mac(lport, mac);
> > - }
> > -
> > - /* Change state to reflect transition to FC mode */
> > - spin_lock_irq(&fnic->fnic_lock);
> > - if (fnic->state == FNIC_IN_ETH_MODE || fnic->state == FNIC_IN_FC_MODE)
> > - fnic->state = FNIC_IN_ETH_TRANS_FC_MODE;
> > - else {
> > - FNIC_FCS_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
> > - "Unexpected fnic state: %s processing FLOGI response",
> > - fnic_state_to_str(fnic->state));
> > - spin_unlock_irq(&fnic->fnic_lock);
> > - return;
> > - }
> > - spin_unlock_irq(&fnic->fnic_lock);
> > -
> > - /*
> > - * Send FLOGI registration to firmware to set up FC mode.
> > - * The new address will be set up when registration completes.
> > - */
> > - ret = fnic_flogi_reg_handler(fnic, port_id);
> > -
> > - if (ret < 0) {
> > - spin_lock_irq(&fnic->fnic_lock);
> > - if (fnic->state == FNIC_IN_ETH_TRANS_FC_MODE)
> > - fnic->state = FNIC_IN_ETH_MODE;
> > - spin_unlock_irq(&fnic->fnic_lock);
> > - }
> > -}
> > -
> > static void fnic_rq_cmpl_frame_recv(struct vnic_rq *rq, struct cq_desc
> > *cq_desc, struct vnic_rq_buf *buf,
> > int skipped __attribute__((unused)),
> > void *opaque)
> > {
> > struct fnic *fnic = vnic_dev_priv(rq->vdev);
> > - struct sk_buff *skb;
> > - struct fc_frame *fp;
> > + uint8_t *fp;
> > struct fnic_stats *fnic_stats = &fnic->fnic_stats;
> > + unsigned int ethhdr_stripped;
> > u8 type, color, eop, sop, ingress_port, vlan_stripped;
> > - u8 fcoe = 0, fcoe_sof, fcoe_eof;
> > - u8 fcoe_fc_crc_ok = 1, fcoe_enc_error = 0;
> > - u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
> > - u8 ipv6, ipv4, ipv4_fragment, rss_type, csum_not_calc;
> > + u8 fcoe_fnic_crc_ok = 1, fcoe_enc_error = 0;
> > u8 fcs_ok = 1, packet_error = 0;
> > - u16 q_number, completed_index, bytes_written = 0, vlan, checksum;
> > + u16 q_number, completed_index, vlan;
> > u32 rss_hash;
> > + u16 checksum;
> > + u8 csum_not_calc, rss_type, ipv4, ipv6, ipv4_fragment;
> > + u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
> > + u8 fcoe = 0, fcoe_sof, fcoe_eof;
> > u16 exchange_id, tmpl;
> > u8 sof = 0;
> > u8 eof = 0;
> > u32 fcp_bytes_written = 0;
> > + u16 enet_bytes_written = 0;
> > + u32 bytes_written = 0;
> > unsigned long flags;
> > + struct fnic_frame_list *frame_elem = NULL;
> > + struct fnic_eth_hdr_s *eh;
>
> so many local variables tells me that this function is too big without
> even looking at it further
I understand John. This set of changes is only meant to make
the function work with the FDLS functionality.
> >
> > dma_unmap_single(&fnic->pdev->dev, buf->dma_addr, buf->len,
> > - DMA_FROM_DEVICE);
> > - skb = buf->os_buf;
> > - fp = (struct fc_frame *)skb;
> > + DMA_FROM_DEVICE);
> > + fp = (uint8_t *) buf->os_buf;
> > buf->os_buf = NULL;
> >
> > cq_desc_dec(cq_desc, &type, &color, &q_number, &completed_index);
> > if (type == CQ_DESC_TYPE_RQ_FCP) {
> > - cq_fcp_rq_desc_dec((struct cq_fcp_rq_desc *)cq_desc,
> > - &type, &color, &q_number, &completed_index,
> > - &eop, &sop, &fcoe_fc_crc_ok, &exchange_id,
> > - &tmpl, &fcp_bytes_written, &sof, &eof,
> > - &ingress_port, &packet_error,
> > - &fcoe_enc_error, &fcs_ok, &vlan_stripped,
> > - &vlan);
> > - skb_trim(skb, fcp_bytes_written);
> > - fr_sof(fp) = sof;
> > - fr_eof(fp) = eof;
> > -
> > + cq_fcp_rq_desc_dec((struct cq_fcp_rq_desc *) cq_desc, &type,
> > + &color, &q_number, &completed_index, &eop, &sop,
> > + &fcoe_fnic_crc_ok, &exchange_id, &tmpl,
> > + &fcp_bytes_written, &sof, &eof, &ingress_port,
> > + &packet_error, &fcoe_enc_error, &fcs_ok,
> > + &vlan_stripped, &vlan);
> > + ethhdr_stripped = 1;
> > + bytes_written = fcp_bytes_written;
> > } else if (type == CQ_DESC_TYPE_RQ_ENET) {
> > - cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
> > - &type, &color, &q_number, &completed_index,
> > - &ingress_port, &fcoe, &eop, &sop,
> > - &rss_type, &csum_not_calc, &rss_hash,
> > - &bytes_written, &packet_error,
> > - &vlan_stripped, &vlan, &checksum,
> > - &fcoe_sof, &fcoe_fc_crc_ok,
> > - &fcoe_enc_error, &fcoe_eof,
> > - &tcp_udp_csum_ok, &udp, &tcp,
> > - &ipv4_csum_ok, &ipv6, &ipv4,
> > - &ipv4_fragment, &fcs_ok);
>
> I think that cq_enet_rq_desc_dec() accepts too many arguments, to say
> the least
>
> I also could not help but notice that there is a cq_enet_rq_desc_dec()
> in this driver and also one in
> drivers/net/ethernet/cisco/enic/cq_enet_desc.h - could they be made common?
Thanks for your observations John. The Cisco team will evaluate your suggestion
w.r.t this.
>
> > - skb_trim(skb, bytes_written);
> > + cq_enet_rq_desc_dec((struct cq_enet_rq_desc *) cq_desc, &type,
> > + &color, &q_number, &completed_index,
> > + &ingress_port, &fcoe, &eop, &sop, &rss_type,
> > + &csum_not_calc, &rss_hash, &enet_bytes_written,
> > + &packet_error, &vlan_stripped, &vlan,
> > + &checksum, &fcoe_sof, &fcoe_fnic_crc_ok,
> > + &fcoe_enc_error, &fcoe_eof, &tcp_udp_csum_ok,
> > + &udp, &tcp, &ipv4_csum_ok, &ipv6, &ipv4,
> > + &ipv4_fragment, &fcs_ok);
> > +
> > + ethhdr_stripped = 0;
> > + bytes_written = enet_bytes_written;
> > +
> > if (!fcs_ok) {
> > atomic64_inc(&fnic_stats->misc_stats.frame_errors);
> > - FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,
> > - "fcs error. dropping packet.\n");
> > + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "fnic 0x%p fcs error. Dropping packet.\n", fnic);
> > goto drop;
> > }
> > - if (fnic_import_rq_eth_pkt(fnic, skb))
> > - return;
> > + eh = (struct fnic_eth_hdr_s *) fp;
> > + if (eh->ether_type != htons(ETH_TYPE_FCOE)) {
> > +
> > + if (fnic_import_rq_eth_pkt(fnic, fp))
> > + return;
> >
> > + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "Dropping ether_type 0x%x",
> > + ntohs(eh->ether_type));
> > + goto drop;
> > + }
> > } else {
> > - /* wrong CQ type*/
> > - shost_printk(KERN_ERR, fnic->lport->host,
> > - "fnic rq_cmpl wrong cq type x%x\n", type);
> > + /* wrong CQ type */
> > + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "fnic rq_cmpl wrong cq type x%x\n", type);
> > goto drop;
> > }
> >
> > - if (!fcs_ok || packet_error || !fcoe_fc_crc_ok || fcoe_enc_error) {
> > + if (!fcs_ok || packet_error || !fcoe_fnic_crc_ok || fcoe_enc_error) {
> > atomic64_inc(&fnic_stats->misc_stats.frame_errors);
> > - FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, fnic->fnic_num,
> > - "fnic rq_cmpl fcoe x%x fcsok x%x"
> > - " pkterr x%x fcoe_fc_crc_ok x%x, fcoe_enc_err"
> > - " x%x\n",
> > - fcoe, fcs_ok, packet_error,
> > - fcoe_fc_crc_ok, fcoe_enc_error);
> > + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "fcoe %x fcsok %x pkterr %x ffco %x fee %x\n",
> > + fcoe, fcs_ok, packet_error,
> > + fcoe_fnic_crc_ok, fcoe_enc_error);
> > goto drop;
> > }
> >
> > spin_lock_irqsave(&fnic->fnic_lock, flags);
> > if (fnic->stop_rx_link_events) {
> > spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> > + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "fnic->stop_rx_link_events: %d\n",
> > + fnic->stop_rx_link_events);
> > goto drop;
> > }
> > - fr_dev(fp) = fnic->lport;
> > +
> > spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> > - if ((fnic_fc_trace_set_data(fnic->lport->host->host_no, FNIC_FC_RECV,
> > - (char *)skb->data, skb->len)) != 0) {
> > - printk(KERN_ERR "fnic ctlr frame trace error!!!");
> > +
> > + frame_elem =
> > + kmalloc(sizeof(struct fnic_frame_list),
> > + GFP_ATOMIC);
>
> GFP_ATOMIC is used way too much
Thanks John. We will evaluate if this is really necessary.
> > + if (!frame_elem) {
> > + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "Unable to alloc frame element of size: %ld\n",
> > + sizeof(struct fnic_frame_list));
> > + goto drop;
> > }
> > + memset(frame_elem, 0, sizeof(struct fnic_frame_list));
> > + frame_elem->fp = fp;
> > + frame_elem->rx_ethhdr_stripped = ethhdr_stripped;
> > + frame_elem->frame_len = bytes_written;
> >
> > - skb_queue_tail(&fnic->frame_queue, skb);
> > queue_work(fnic_event_queue, &fnic->frame_work);
> > -
> > return;
> > +
> > drop:
> > - dev_kfree_skb_irq(skb);
> > + kfree(fp);
> > }
> >
> > static int fnic_rq_cmpl_handler_cont(struct vnic_dev *vdev,
> > @@ -1089,62 +594,6 @@ void fnic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
> > buf->os_buf = NULL;
> > }
> >
> > -/**
> > - * fnic_eth_send() - Send Ethernet frame.
> > - * @fip: fcoe_ctlr instance.
> > - * @skb: Ethernet Frame, FIP, without VLAN encapsulation.
> > - */
> > -void fnic_eth_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
> > -{
> > - struct fnic *fnic = fnic_from_ctlr(fip);
> > - struct vnic_wq *wq = &fnic->wq[0];
> > - dma_addr_t pa;
> > - struct ethhdr *eth_hdr;
> > - struct vlan_ethhdr *vlan_hdr;
> > - unsigned long flags;
> > -
> > - if (!fnic->vlan_hw_insert) {
> > - eth_hdr = (struct ethhdr *)skb_mac_header(skb);
> > - vlan_hdr = skb_push(skb, sizeof(*vlan_hdr) - sizeof(*eth_hdr));
> > - memcpy(vlan_hdr, eth_hdr, 2 * ETH_ALEN);
> > - vlan_hdr->h_vlan_proto = htons(ETH_P_8021Q);
> > - vlan_hdr->h_vlan_encapsulated_proto = eth_hdr->h_proto;
> > - vlan_hdr->h_vlan_TCI = htons(fnic->vlan_id);
> > - if ((fnic_fc_trace_set_data(fnic->lport->host->host_no,
> > - FNIC_FC_SEND|0x80, (char *)eth_hdr, skb->len)) != 0) {
> > - printk(KERN_ERR "fnic ctlr frame trace error!!!");
> > - }
> > - } else {
> > - if ((fnic_fc_trace_set_data(fnic->lport->host->host_no,
> > - FNIC_FC_SEND|0x80, (char *)skb->data, skb->len)) != 0) {
> > - printk(KERN_ERR "fnic ctlr frame trace error!!!");
> > - }
> > - }
> > -
> > - pa = dma_map_single(&fnic->pdev->dev, skb->data, skb->len,
> > - DMA_TO_DEVICE);
> > - if (dma_mapping_error(&fnic->pdev->dev, pa)) {
> > - printk(KERN_ERR "DMA mapping failed\n");
> > - goto free_skb;
> > - }
> > -
> > - spin_lock_irqsave(&fnic->wq_lock[0], flags);
> > - if (!vnic_wq_desc_avail(wq))
> > - goto irq_restore;
> > -
> > - fnic_queue_wq_eth_desc(wq, skb, pa, skb->len,
> > - 0 /* hw inserts cos value */,
> > - fnic->vlan_id, 1);
> > - spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
> > - return;
> > -
> > -irq_restore:
> > - spin_unlock_irqrestore(&fnic->wq_lock[0], flags);
> > - dma_unmap_single(&fnic->pdev->dev, pa, skb->len, DMA_TO_DEVICE);
> > -free_skb:
> > - kfree_skb(skb);
> > -}
> > -
> > /*
> > * Send FC frame.
> > */
> > @@ -1245,6 +694,27 @@ fdls_send_fcoe_frame(struct fnic *fnic, void *payload, int payload_sz,
> > return ret;
> > }
> >
> > +static int
> > +fdls_send_fip_frame(struct fnic *fnic, void *payload, int payload_sz)
> > +{
> > + uint8_t *frame;
> > + int max_framesz = FNIC_FCOE_FRAME_MAXSZ;
> > + int ret;
> > +
> > + frame = kmalloc(max_framesz, GFP_ATOMIC);
>
> why even use GFP_ATOMIC here (and not GFP_KERNEL)?
Thanks John. We will evaluate if this can be done.
> > + if (!frame) {
> > + FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
> > + "fnic 0x%p Failed to allocate fip frame\n", fnic);
> > + return -1;
> > + }
> > + memset(frame, 0, max_framesz);
> > +
> > + memcpy(frame, (uint8_t *) payload, payload_sz);
> > + ret = fnic_send_frame(fnic, frame, payload_sz);
> > +
> > + return ret;
> > +}
> > +
> > int fnic_send_fcoe_frame(struct fnic_iport_s *iport, void *payload,
> > int payload_sz)
> > {
> > @@ -1269,6 +739,18 @@ int fnic_send_fcoe_frame(struct fnic_iport_s *iport, void *payload,
> > return ret;
> > }
> >
> > +int
>
> who checks this return value? None, AFAICS
Thanks John. We will evaluate if the return value is really necessary.
>
> > +fnic_send_fip_frame(struct fnic_iport_s *iport, void *payload,
> > + int payload_sz)
> > +{
> > + struct fnic *fnic = iport->fnic;
> > +
> > + if (fnic->in_remove)
> > + return -1;
> > +
> > + return fdls_send_fip_frame(fnic, payload, payload_sz);
> > +}
> > +
> > /**
> > * fnic_flush_tx() - send queued frames.
> > * @work: pointer to work element
> > @@ -1342,44 +824,6 @@ fnic_fdls_register_portid(struct fnic_iport_s *iport, u32 port_id,
> > return 0;
> > }
> >
> > -/**
> > - * fnic_set_eth_mode() - put fnic into ethernet mode.
> > - * @fnic: fnic device
> > - *
> > - * Called without fnic lock held.
> > - */
> > -static void fnic_set_eth_mode(struct fnic *fnic)
> > -{
> > - unsigned long flags;
> > - enum fnic_state old_state;
> > - int ret;
> > -
> > - spin_lock_irqsave(&fnic->fnic_lock, flags);
> > -again:
> > - old_state = fnic->state;
> > - switch (old_state) {
> > - case FNIC_IN_FC_MODE:
> > - case FNIC_IN_ETH_TRANS_FC_MODE:
> > - default:
> > - fnic->state = FNIC_IN_FC_TRANS_ETH_MODE;
> > - spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> > -
> > - ret = fnic_fw_reset_handler(fnic);
> > -
> > - spin_lock_irqsave(&fnic->fnic_lock, flags);
> > - if (fnic->state != FNIC_IN_FC_TRANS_ETH_MODE)
> > - goto again;
> > - if (ret)
> > - fnic->state = old_state;
> > - break;
> > -
> > - case FNIC_IN_FC_TRANS_ETH_MODE:
> > - case FNIC_IN_ETH_MODE:
> > - break;
> > - }
> > - spin_unlock_irqrestore(&fnic->fnic_lock, flags);
> > -}
> > -
> > void fnic_free_txq(struct list_head *head)
> > {
> > struct fnic_frame_list *cur_frame, *next;
> > @@ -1449,24 +893,3 @@ void fnic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
> > buf->os_buf = NULL;
> > }
> >
> > -void fnic_fcoe_reset_vlans(struct fnic *fnic)
> > -{
> > - unsigned long flags;
> > - struct fcoe_vlan *vlan;
> > - struct fcoe_vlan *next;
> > -
> > - /*
> > - * indicate a link down to fcoe so that all fcf's are free'd
> > - * might not be required since we did this before sending vlan
> > - * discovery request
> > - */
> > - spin_lock_irqsave(&fnic->vlans_lock, flags);
> > - if (!list_empty(&fnic->vlans)) {
> > - list_for_each_entry_safe(vlan, next, &fnic->vlans, list) {
> > - list_del(&vlan->list);
> > - kfree(vlan);
> > - }
> > - }
> > - spin_unlock_irqrestore(&fnic->vlans_lock, flags);
> > -}
> > -
> > diff --git a/drivers/scsi/fnic/fnic_main.c b/drivers/scsi/fnic/fnic_main.c
> > index 7d10d603f53b..d850ce4b743d 100644
> > --- a/drivers/scsi/fnic/fnic_main.c
> > +++ b/drivers/scsi/fnic/fnic_main.c
> > @@ -85,12 +85,13 @@ module_param(fnic_max_qdepth, uint, S_IRUGO|S_IWUSR);
> > MODULE_PARM_DESC(fnic_max_qdepth, "Queue depth to report for each LUN");
> >
> > static struct libfc_function_template fnic_transport_template = {
> > - .lport_set_port_id = fnic_set_port_id,
> > .fcp_abort_io = fnic_empty_scsi_cleanup,
> > .fcp_cleanup = fnic_empty_scsi_cleanup,
> > .exch_mgr_reset = fnic_exch_mgr_reset
> > };
> >
> > +struct workqueue_struct *fnic_fip_queue;
> > +
> > static int fnic_slave_alloc(struct scsi_device *sdev)
> > {
> > struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
> > @@ -413,13 +414,6 @@ static void fnic_notify_timer(struct timer_list *t)
> > round_jiffies(jiffies + FNIC_NOTIFY_TIMER_PERIOD));
> > }
> >
> > -static void fnic_fip_notify_timer(struct timer_list *t)
> > -{
> > - struct fnic *fnic = from_timer(fnic, t, fip_timer);
> > -
> > - /* Placeholder function */
> > -}
> > -
> > static void fnic_notify_timer_start(struct fnic *fnic)
> > {
> > switch (vnic_dev_get_intr_mode(fnic->vdev)) {
> > @@ -531,17 +525,6 @@ static void fnic_iounmap(struct fnic *fnic)
> > iounmap(fnic->bar0.vaddr);
> > }
> >
> > -/**
> > - * fnic_get_mac() - get assigned data MAC address for FIP code.
> > - * @lport: local port.
> > - */
> > -static u8 *fnic_get_mac(struct fc_lport *lport)
> > -{
> > - struct fnic *fnic = lport_priv(lport);
> > -
> > - return fnic->data_src_addr;
> > -}
> > -
> > static void fnic_set_vlan(struct fnic *fnic, u16 vlan_id)
> > {
> > vnic_dev_set_default_vlan(fnic->vdev, vlan_id);
> > @@ -814,26 +797,23 @@ static int fnic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
> > fnic->vlan_hw_insert = 1;
> > fnic->vlan_id = 0;
> >
> > - /* Initialize the FIP fcoe_ctrl struct */
> > - fnic->ctlr.send = fnic_eth_send;
> > - fnic->ctlr.update_mac = fnic_update_mac;
> > - fnic->ctlr.get_src_addr = fnic_get_mac;
> > if (fnic->config.flags & VFCF_FIP_CAPABLE) {
> > pr_info("firmware supports FIP\n");
> > /* enable directed and multicast */
> > vnic_dev_packet_filter(fnic->vdev, 1, 1, 0, 0, 0);
> > vnic_dev_add_addr(fnic->vdev, FIP_ALL_ENODE_MACS);
> > vnic_dev_add_addr(fnic->vdev, fnic->ctlr.ctl_src_addr);
> > - fnic->set_vlan = fnic_set_vlan;
> > fcoe_ctlr_init(&fnic->ctlr, FIP_MODE_AUTO);
> > - timer_setup(&fnic->fip_timer, fnic_fip_notify_timer, 0);
> > spin_lock_init(&fnic->vlans_lock);
> > INIT_WORK(&fnic->fip_frame_work, fnic_handle_fip_frame);
> > - INIT_WORK(&fnic->event_work, fnic_handle_event);
> > INIT_WORK(&fnic->flush_work, fnic_flush_tx);
> > - skb_queue_head_init(&fnic->fip_frame_queue);
> > - INIT_LIST_HEAD(&fnic->evlist);
> > - INIT_LIST_HEAD(&fnic->vlans);
> > + INIT_LIST_HEAD(&fnic->fip_frame_queue);
> > + INIT_LIST_HEAD(&fnic->vlan_list);
> > + timer_setup(&fnic->retry_fip_timer, fnic_handle_fip_timer, 0);
> > + timer_setup(&fnic->fcs_ka_timer, fnic_handle_fcs_ka_timer, 0);
> > + timer_setup(&fnic->enode_ka_timer, fnic_handle_enode_ka_timer, 0);
> > + timer_setup(&fnic->vn_ka_timer, fnic_handle_vn_ka_timer, 0);
> > + fnic->set_vlan = fnic_set_vlan;
>
> so many timers, work structs, lists. I don't know how all this is
> co-ordinated sanely....
I understand John. Thanks for your time and patience in evaluating this
large set of changes.
>
> > } else {
> > pr_info("firmware uses non-FIP mode\n");
> > fcoe_ctlr_init(&fnic->ctlr, FIP_MODE_NON_FIP);
> > @@ -1030,10 +1010,13 @@ static void fnic_remove(struct pci_dev *pdev)
> > fnic_free_txq(&fnic->tx_queue);
> >
> > if (fnic->config.flags & VFCF_FIP_CAPABLE) {
> > - del_timer_sync(&fnic->fip_timer);
> > - skb_queue_purge(&fnic->fip_frame_queue);
> > + del_timer_sync(&fnic->retry_fip_timer);
> > + del_timer_sync(&fnic->fcs_ka_timer);
> > + del_timer_sync(&fnic->enode_ka_timer);
> > + del_timer_sync(&fnic->vn_ka_timer);
> > +
> > + fnic_free_txq(&fnic->fip_frame_queue);
> > fnic_fcoe_reset_vlans(fnic);
> > - fnic_fcoe_evlist_free(fnic);
> > }
> >
> > if ((fnic_fdmi_support == 1) && (fnic->iport.fabric.fdmi_pending > 0))
>
Regards,
Karan
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