diff options
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/fcoe/fc_transport_fcoe.c | 91 | ||||
| -rw-r--r-- | drivers/scsi/fcoe/fcoe_sw.c | 56 | ||||
| -rw-r--r-- | drivers/scsi/fcoe/libfcoe.c | 318 | ||||
| -rw-r--r-- | drivers/scsi/libfc/fc_disc.c | 63 | ||||
| -rw-r--r-- | drivers/scsi/libfc/fc_exch.c | 32 | ||||
| -rw-r--r-- | drivers/scsi/libfc/fc_fcp.c | 56 | ||||
| -rw-r--r-- | drivers/scsi/libfc/fc_lport.c | 173 | ||||
| -rw-r--r-- | drivers/scsi/libfc/fc_rport.c | 197 | ||||
| -rw-r--r-- | drivers/scsi/qla2xxx/qla_attr.c | 9 | ||||
| -rw-r--r-- | drivers/scsi/qla2xxx/qla_init.c | 19 | ||||
| -rw-r--r-- | drivers/scsi/qla2xxx/qla_mbx.c | 3 | ||||
| -rw-r--r-- | drivers/scsi/qla2xxx/qla_mid.c | 10 | ||||
| -rw-r--r-- | drivers/scsi/qla2xxx/qla_os.c | 6 | ||||
| -rw-r--r-- | drivers/scsi/qla2xxx/qla_version.h | 2 | ||||
| -rw-r--r-- | drivers/scsi/sd.c | 26 |
15 files changed, 499 insertions, 562 deletions
diff --git a/drivers/scsi/fcoe/fc_transport_fcoe.c b/drivers/scsi/fcoe/fc_transport_fcoe.c index bf7fe6fc082..8862758006c 100644 --- a/drivers/scsi/fcoe/fc_transport_fcoe.c +++ b/drivers/scsi/fcoe/fc_transport_fcoe.c @@ -33,19 +33,19 @@ static LIST_HEAD(fcoe_transports); static DEFINE_MUTEX(fcoe_transports_lock); /** - * fcoe_transport_default - returns ptr to the default transport fcoe_sw - **/ + * fcoe_transport_default() - Returns ptr to the default transport fcoe_sw + */ struct fcoe_transport *fcoe_transport_default(void) { return &fcoe_sw_transport; } /** - * fcoe_transport_to_pcidev - get the pci dev from a netdev + * fcoe_transport_to_pcidev() - get the pci dev from a netdev * @netdev: the netdev that pci dev will be retrived from * * Returns: NULL or the corrsponding pci_dev - **/ + */ struct pci_dev *fcoe_transport_pcidev(const struct net_device *netdev) { if (!netdev->dev.parent) @@ -54,18 +54,17 @@ struct pci_dev *fcoe_transport_pcidev(const struct net_device *netdev) } /** - * fcoe_transport_device_lookup - find out netdev is managed by the - * transport - * assign a transport to a device + * fcoe_transport_device_lookup() - Lookup a transport * @netdev: the netdev the transport to be attached to * * This will look for existing offload driver, if not found, it falls back to * the default sw hba (fcoe_sw) as its fcoe transport. * * Returns: 0 for success - **/ -static struct fcoe_transport_internal *fcoe_transport_device_lookup( - struct fcoe_transport *t, struct net_device *netdev) + */ +static struct fcoe_transport_internal * +fcoe_transport_device_lookup(struct fcoe_transport *t, + struct net_device *netdev) { struct fcoe_transport_internal *ti; @@ -81,14 +80,14 @@ static struct fcoe_transport_internal *fcoe_transport_device_lookup( return NULL; } /** - * fcoe_transport_device_add - assign a transport to a device + * fcoe_transport_device_add() - Assign a transport to a device * @netdev: the netdev the transport to be attached to * * This will look for existing offload driver, if not found, it falls back to * the default sw hba (fcoe_sw) as its fcoe transport. * * Returns: 0 for success - **/ + */ static int fcoe_transport_device_add(struct fcoe_transport *t, struct net_device *netdev) { @@ -123,14 +122,14 @@ static int fcoe_transport_device_add(struct fcoe_transport *t, } /** - * fcoe_transport_device_remove - remove a device from its transport + * fcoe_transport_device_remove() - Remove a device from its transport * @netdev: the netdev the transport to be attached to * - * this removes the device from the transport so the given transport will + * This removes the device from the transport so the given transport will * not manage this device any more * * Returns: 0 for success - **/ + */ static int fcoe_transport_device_remove(struct fcoe_transport *t, struct net_device *netdev) { @@ -155,13 +154,13 @@ static int fcoe_transport_device_remove(struct fcoe_transport *t, } /** - * fcoe_transport_device_remove_all - remove all from transport devlist + * fcoe_transport_device_remove_all() - Remove all from transport devlist * - * this removes the device from the transport so the given transport will + * This removes the device from the transport so the given transport will * not manage this device any more * * Returns: 0 for success - **/ + */ static void fcoe_transport_device_remove_all(struct fcoe_transport *t) { struct fcoe_transport_internal *ti, *tmp; @@ -175,18 +174,18 @@ static void fcoe_transport_device_remove_all(struct fcoe_transport *t) } /** - * fcoe_transport_match - use the bus device match function to match the hw - * @t: the fcoe transport - * @netdev: + * fcoe_transport_match() - Use the bus device match function to match the hw + * @t: The fcoe transport to check + * @netdev: The netdev to match against * - * This function is used to check if the givne transport wants to manage the + * This function is used to check if the given transport wants to manage the * input netdev. if the transports implements the match function, it will be * called, o.w. we just compare the pci vendor and device id. * * Returns: true for match up - **/ + */ static bool fcoe_transport_match(struct fcoe_transport *t, - struct net_device *netdev) + struct net_device *netdev) { /* match transport by vendor and device id */ struct pci_dev *pci; @@ -210,17 +209,17 @@ static bool fcoe_transport_match(struct fcoe_transport *t, } /** - * fcoe_transport_lookup - check if the transport is already registered + * fcoe_transport_lookup() - Check if the transport is already registered * @t: the transport to be looked up * * This compares the parent device (pci) vendor and device id * * Returns: NULL if not found * - * TODO - return default sw transport if no other transport is found - **/ -static struct fcoe_transport *fcoe_transport_lookup( - struct net_device *netdev) + * TODO: return default sw transport if no other transport is found + */ +static struct fcoe_transport * +fcoe_transport_lookup(struct net_device *netdev) { struct fcoe_transport *t; @@ -239,11 +238,11 @@ static struct fcoe_transport *fcoe_transport_lookup( } /** - * fcoe_transport_register - adds a fcoe transport to the fcoe transports list + * fcoe_transport_register() - Adds a fcoe transport to the fcoe transports list * @t: ptr to the fcoe transport to be added * * Returns: 0 for success - **/ + */ int fcoe_transport_register(struct fcoe_transport *t) { struct fcoe_transport *tt; @@ -259,9 +258,6 @@ int fcoe_transport_register(struct fcoe_transport *t) list_add_tail(&t->list, &fcoe_transports); mutex_unlock(&fcoe_transports_lock); - mutex_init(&t->devlock); - INIT_LIST_HEAD(&t->devlist); - printk(KERN_DEBUG "fcoe_transport_register:%s\n", t->name); return 0; @@ -269,11 +265,11 @@ int fcoe_transport_register(struct fcoe_transport *t) EXPORT_SYMBOL_GPL(fcoe_transport_register); /** - * fcoe_transport_unregister - remove the tranport fro the fcoe transports list + * fcoe_transport_unregister() - Remove the tranport fro the fcoe transports list * @t: ptr to the fcoe transport to be removed * * Returns: 0 for success - **/ + */ int fcoe_transport_unregister(struct fcoe_transport *t) { struct fcoe_transport *tt, *tmp; @@ -294,8 +290,8 @@ int fcoe_transport_unregister(struct fcoe_transport *t) } EXPORT_SYMBOL_GPL(fcoe_transport_unregister); -/* - * fcoe_load_transport_driver - load an offload driver by alias name +/** + * fcoe_load_transport_driver() - Load an offload driver by alias name * @netdev: the target net device * * Requests for an offload driver module as the fcoe transport, if fails, it @@ -307,7 +303,7 @@ EXPORT_SYMBOL_GPL(fcoe_transport_unregister); * 3. pure hw fcoe hba may not have netdev * * Returns: 0 for success - **/ + */ int fcoe_load_transport_driver(struct net_device *netdev) { struct pci_dev *pci; @@ -335,14 +331,14 @@ int fcoe_load_transport_driver(struct net_device *netdev) EXPORT_SYMBOL_GPL(fcoe_load_transport_driver); /** - * fcoe_transport_attach - load transport to fcoe + * fcoe_transport_attach() - Load transport to fcoe * @netdev: the netdev the transport to be attached to * * This will look for existing offload driver, if not found, it falls back to * the default sw hba (fcoe_sw) as its fcoe transport. * * Returns: 0 for success - **/ + */ int fcoe_transport_attach(struct net_device *netdev) { struct fcoe_transport *t; @@ -373,11 +369,11 @@ int fcoe_transport_attach(struct net_device *netdev) EXPORT_SYMBOL_GPL(fcoe_transport_attach); /** - * fcoe_transport_release - unload transport from fcoe + * fcoe_transport_release() - Unload transport from fcoe * @netdev: the net device on which fcoe is to be released * * Returns: 0 for success - **/ + */ int fcoe_transport_release(struct net_device *netdev) { struct fcoe_transport *t; @@ -410,12 +406,12 @@ int fcoe_transport_release(struct net_device *netdev) EXPORT_SYMBOL_GPL(fcoe_transport_release); /** - * fcoe_transport_init - initializes fcoe transport layer + * fcoe_transport_init() - Initializes fcoe transport layer * * This prepares for the fcoe transport layer * * Returns: none - **/ + */ int __init fcoe_transport_init(void) { INIT_LIST_HEAD(&fcoe_transports); @@ -424,12 +420,13 @@ int __init fcoe_transport_init(void) } /** - * fcoe_transport_exit - cleans up the fcoe transport layer + * fcoe_transport_exit() - Cleans up the fcoe transport layer + * * This cleans up the fcoe transport layer. removing any transport on the list, * note that the transport destroy func is not called here. * * Returns: none - **/ + */ int __exit fcoe_transport_exit(void) { struct fcoe_transport *t, *tmp; diff --git a/drivers/scsi/fcoe/fcoe_sw.c b/drivers/scsi/fcoe/fcoe_sw.c index dc4cd5e2576..da210eba194 100644 --- a/drivers/scsi/fcoe/fcoe_sw.c +++ b/drivers/scsi/fcoe/fcoe_sw.c @@ -104,19 +104,19 @@ static struct scsi_host_template fcoe_sw_shost_template = { .max_sectors = 0xffff, }; -/* - * fcoe_sw_lport_config - sets up the fc_lport +/** + * fcoe_sw_lport_config() - sets up the fc_lport * @lp: ptr to the fc_lport * @shost: ptr to the parent scsi host * * Returns: 0 for success - * */ static int fcoe_sw_lport_config(struct fc_lport *lp) { int i = 0; - lp->link_status = 0; + lp->link_up = 0; + lp->qfull = 0; lp->max_retry_count = 3; lp->e_d_tov = 2 * 1000; /* FC-FS default */ lp->r_a_tov = 2 * 2 * 1000; @@ -136,16 +136,14 @@ static int fcoe_sw_lport_config(struct fc_lport *lp) return 0; } -/* - * fcoe_sw_netdev_config - sets up fcoe_softc for lport and network - * related properties +/** + * fcoe_sw_netdev_config() - Set up netdev for SW FCoE * @lp : ptr to the fc_lport * @netdev : ptr to the associated netdevice struct * * Must be called after fcoe_sw_lport_config() as it will use lport mutex * * Returns : 0 for success - * */ static int fcoe_sw_netdev_config(struct fc_lport *lp, struct net_device *netdev) { @@ -181,9 +179,8 @@ static int fcoe_sw_netdev_config(struct fc_lport *lp, struct net_device *netdev) if (fc_set_mfs(lp, mfs)) return -EINVAL; - lp->link_status = ~FC_PAUSE & ~FC_LINK_UP; if (!fcoe_link_ok(lp)) - lp->link_status |= FC_LINK_UP; + lp->link_up = 1; /* offload features support */ if (fc->real_dev->features & NETIF_F_SG) @@ -191,6 +188,7 @@ static int fcoe_sw_netdev_config(struct fc_lport *lp, struct net_device *netdev) skb_queue_head_init(&fc->fcoe_pending_queue); + fc->fcoe_pending_queue_active = 0; /* setup Source Mac Address */ memcpy(fc->ctl_src_addr, fc->real_dev->dev_addr, @@ -224,16 +222,15 @@ static int fcoe_sw_netdev_config(struct fc_lport *lp, struct net_device *netdev) return 0; } -/* - * fcoe_sw_shost_config - sets up fc_lport->host +/** + * fcoe_sw_shost_config() - Sets up fc_lport->host * @lp : ptr to the fc_lport * @shost : ptr to the associated scsi host * @dev : device associated to scsi host * - * Must be called after fcoe_sw_lport_config) and fcoe_sw_netdev_config() + * Must be called after fcoe_sw_lport_config() and fcoe_sw_netdev_config() * * Returns : 0 for success - * */ static int fcoe_sw_shost_config(struct fc_lport *lp, struct Scsi_Host *shost, struct device *dev) @@ -261,8 +258,8 @@ static int fcoe_sw_shost_config(struct fc_lport *lp, struct Scsi_Host *shost, return 0; } -/* - * fcoe_sw_em_config - allocates em for this lport +/** + * fcoe_sw_em_config() - allocates em for this lport * @lp: the port that em is to allocated for * * Returns : 0 on success @@ -279,8 +276,8 @@ static inline int fcoe_sw_em_config(struct fc_lport *lp) return 0; } -/* - * fcoe_sw_destroy - FCoE software HBA tear-down function +/** + * fcoe_sw_destroy() - FCoE software HBA tear-down function * @netdev: ptr to the associated net_device * * Returns: 0 if link is OK for use by FCoE. @@ -301,7 +298,7 @@ static int fcoe_sw_destroy(struct net_device *netdev) if (!lp) return -ENODEV; - fc = fcoe_softc(lp); + fc = lport_priv(lp); /* Logout of the fabric */ fc_fabric_logoff(lp); @@ -353,8 +350,8 @@ static struct libfc_function_template fcoe_sw_libfc_fcn_templ = { .frame_send = fcoe_xmit, }; -/* - * fcoe_sw_create - this function creates the fcoe interface +/** + * fcoe_sw_create() - this function creates the fcoe interface * @netdev: pointer the associated netdevice * * Creates fc_lport struct and scsi_host for lport, configures lport @@ -440,8 +437,8 @@ out_host_put: return rc; } -/* - * fcoe_sw_match - the fcoe sw transport match function +/** + * fcoe_sw_match() - The FCoE SW transport match function * * Returns : false always */ @@ -461,8 +458,8 @@ struct fcoe_transport fcoe_sw_transport = { .device = 0xffff, }; -/* - * fcoe_sw_init - registers fcoe_sw_transport +/** + * fcoe_sw_init() - Registers fcoe_sw_transport * * Returns : 0 on success */ @@ -471,17 +468,22 @@ int __init fcoe_sw_init(void) /* attach to scsi transport */ scsi_transport_fcoe_sw = fc_attach_transport(&fcoe_sw_transport_function); + if (!scsi_transport_fcoe_sw) { printk(KERN_ERR "fcoe_sw_init:fc_attach_transport() failed\n"); return -ENODEV; } + + mutex_init(&fcoe_sw_transport.devlock); + INIT_LIST_HEAD(&fcoe_sw_transport.devlist); + /* register sw transport */ fcoe_transport_register(&fcoe_sw_transport); return 0; } -/* - * fcoe_sw_exit - unregisters fcoe_sw_transport +/** + * fcoe_sw_exit() - Unregisters fcoe_sw_transport * * Returns : 0 on success */ diff --git a/drivers/scsi/fcoe/libfcoe.c b/drivers/scsi/fcoe/libfcoe.c index e419f486cdb..5548bf3bb58 100644 --- a/drivers/scsi/fcoe/libfcoe.c +++ b/drivers/scsi/fcoe/libfcoe.c @@ -49,6 +49,7 @@ static int debug_fcoe; #define FCOE_MAX_QUEUE_DEPTH 256 +#define FCOE_LOW_QUEUE_DEPTH 32 /* destination address mode */ #define FCOE_GW_ADDR_MODE 0x00 @@ -69,8 +70,6 @@ struct fcoe_percpu_s *fcoe_percpu[NR_CPUS]; /* Function Prototyes */ static int fcoe_check_wait_queue(struct fc_lport *); -static void fcoe_insert_wait_queue_head(struct fc_lport *, struct sk_buff *); -static void fcoe_insert_wait_queue(struct fc_lport *, struct sk_buff *); static void fcoe_recv_flogi(struct fcoe_softc *, struct fc_frame *, u8 *); #ifdef CONFIG_HOTPLUG_CPU static int fcoe_cpu_callback(struct notifier_block *, ulong, void *); @@ -91,13 +90,13 @@ static struct notifier_block fcoe_cpu_notifier = { }; /** - * fcoe_create_percpu_data - creates the associated cpu data + * fcoe_create_percpu_data() - creates the associated cpu data * @cpu: index for the cpu where fcoe cpu data will be created * * create percpu stats block, from cpu add notifier * * Returns: none - **/ + */ static void fcoe_create_percpu_data(int cpu) { struct fc_lport *lp; @@ -115,13 +114,13 @@ static void fcoe_create_percpu_data(int cpu) } /** - * fcoe_destroy_percpu_data - destroys the associated cpu data + * fcoe_destroy_percpu_data() - destroys the associated cpu data * @cpu: index for the cpu where fcoe cpu data will destroyed * * destroy percpu stats block called by cpu add/remove notifier * * Retuns: none - **/ + */ static void fcoe_destroy_percpu_data(int cpu) { struct fc_lport *lp; @@ -137,7 +136,7 @@ static void fcoe_destroy_percpu_data(int cpu) } /** - * fcoe_cpu_callback - fcoe cpu hotplug event callback + * fcoe_cpu_callback() - fcoe cpu hotplug event callback * @nfb: callback data block * @action: event triggering the callback * @hcpu: index for the cpu of this event @@ -145,7 +144,7 @@ static void fcoe_destroy_percpu_data(int cpu) * this creates or destroys per cpu data for fcoe * * Returns NOTIFY_OK always. - **/ + */ static int fcoe_cpu_callback(struct notifier_block *nfb, unsigned long action, void *hcpu) { @@ -166,7 +165,7 @@ static int fcoe_cpu_callback(struct notifier_block *nfb, unsigned long action, #endif /* CONFIG_HOTPLUG_CPU */ /** - * fcoe_rcv - this is the fcoe receive function called by NET_RX_SOFTIRQ + * fcoe_rcv() - this is the fcoe receive function called by NET_RX_SOFTIRQ * @skb: the receive skb * @dev: associated net device * @ptype: context @@ -175,7 +174,7 @@ static int fcoe_cpu_callback(struct notifier_block *nfb, unsigned long action, * this function will receive the packet and build fc frame and pass it up * * Returns: 0 for success - **/ + */ int fcoe_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *ptype, struct net_device *olddev) { @@ -265,11 +264,11 @@ err2: EXPORT_SYMBOL_GPL(fcoe_rcv); /** - * fcoe_start_io - pass to netdev to start xmit for fcoe + * fcoe_start_io() - pass to netdev to start xmit for fcoe * @skb: the skb to be xmitted * * Returns: 0 for success - **/ + */ static inline int fcoe_start_io(struct sk_buff *skb) { int rc; @@ -283,12 +282,12 @@ static inline int fcoe_start_io(struct sk_buff *skb) } /** - * fcoe_get_paged_crc_eof - in case we need alloc a page for crc_eof + * fcoe_get_paged_crc_eof() - in case we need alloc a page for crc_eof * @skb: the skb to be xmitted * @tlen: total len * * Returns: 0 for success - **/ + */ static int fcoe_get_paged_crc_eof(struct sk_buff *skb, int tlen) { struct fcoe_percpu_s *fps; @@ -326,13 +325,12 @@ static int fcoe_get_paged_crc_eof(struct sk_buff *skb, int tlen) } /** - * fcoe_fc_crc - calculates FC CRC in this fcoe skb + * fcoe_fc_crc() - calculates FC CRC in this fcoe skb * @fp: the fc_frame containg data to be checksummed * * This uses crc32() to calculate the crc for fc frame * Return : 32 bit crc - * - **/ + */ u32 fcoe_fc_crc(struct fc_frame *fp) { struct sk_buff *skb = fp_skb(fp); @@ -363,13 +361,12 @@ u32 fcoe_fc_crc(struct fc_frame *fp) EXPORT_SYMBOL_GPL(fcoe_fc_crc); /** - * fcoe_xmit - FCoE frame transmit function + * fcoe_xmit() - FCoE frame transmit function * @lp: the associated local port * @fp: the fc_frame to be transmitted * * Return : 0 for success - * - **/ + */ int fcoe_xmit(struct fc_lport *lp, struct fc_frame *fp) { int wlen, rc = 0; @@ -389,7 +386,7 @@ int fcoe_xmit(struct fc_lport *lp, struct fc_frame *fp) WARN_ON((fr_len(fp) % sizeof(u32)) != 0); - fc = fcoe_softc(lp); + fc = lport_priv(lp); /* * if it is a flogi then we need to learn gw-addr * and my own fcid @@ -439,7 +436,7 @@ int fcoe_xmit(struct fc_lport *lp, struct fc_frame *fp) if (skb_is_nonlinear(skb)) { skb_frag_t *frag; if (fcoe_get_paged_crc_eof(skb, tlen)) { - kfree(skb); + kfree_skb(skb); return -ENOMEM; } frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1]; @@ -502,21 +499,22 @@ int fcoe_xmit(struct fc_lport *lp, struct fc_frame *fp) rc = fcoe_start_io(skb); if (rc) { - fcoe_insert_wait_queue(lp, skb); + spin_lock_bh(&fc->fcoe_pending_queue.lock); + __skb_queue_tail(&fc->fcoe_pending_queue, skb); + spin_unlock_bh(&fc->fcoe_pending_queue.lock); if (fc->fcoe_pending_queue.qlen > FCOE_MAX_QUEUE_DEPTH) - fc_pause(lp); + lp->qfull = 1; } return 0; } EXPORT_SYMBOL_GPL(fcoe_xmit); -/* - * fcoe_percpu_receive_thread - recv thread per cpu +/** + * fcoe_percpu_receive_thread() - recv thread per cpu * @arg: ptr to the fcoe per cpu struct * * Return: 0 for success - * */ int fcoe_percpu_receive_thread(void *arg) { @@ -533,7 +531,7 @@ int fcoe_percpu_receive_thread(void *arg) struct fcoe_softc *fc; struct fcoe_hdr *hp; - set_user_nice(current, 19); + set_user_nice(current, -20); while (!kthread_should_stop()) { @@ -658,7 +656,7 @@ int fcoe_percpu_receive_thread(void *arg) } /** - * fcoe_recv_flogi - flogi receive function + * fcoe_recv_flogi() - flogi receive function * @fc: associated fcoe_softc * @fp: the recieved frame * @sa: the source address of this flogi @@ -667,7 +665,7 @@ int fcoe_percpu_receive_thread(void *arg) * mac address for the initiator, eitehr OUI based or GW based. * * Returns: none - **/ + */ static void fcoe_recv_flogi(struct fcoe_softc *fc, struct fc_frame *fp, u8 *sa) { struct fc_frame_header *fh; @@ -715,32 +713,23 @@ static void fcoe_recv_flogi(struct fcoe_softc *fc, struct fc_frame *fp, u8 *sa) } /** - * fcoe_watchdog - fcoe timer callback + * fcoe_watchdog() - fcoe timer callback * @vp: * - * This checks the pending queue length for fcoe and put fcoe to be paused state + * This checks the pending queue length for fcoe and set lport qfull * if the FCOE_MAX_QUEUE_DEPTH is reached. This is done for all fc_lport on the * fcoe_hostlist. * * Returns: 0 for success - **/ + */ void fcoe_watchdog(ulong vp) { - struct fc_lport *lp; struct fcoe_softc *fc; - int paused = 0; read_lock(&fcoe_hostlist_lock); list_for_each_entry(fc, &fcoe_hostlist, list) { - lp = fc->lp; - if (lp) { - if (fc->fcoe_pending_queue.qlen > FCOE_MAX_QUEUE_DEPTH) - paused = 1; - if (fcoe_check_wait_queue(lp) < FCOE_MAX_QUEUE_DEPTH) { - if (paused) - fc_unpause(lp); - } - } + if (fc->lp) + fcoe_check_wait_queue(fc->lp); } read_unlock(&fcoe_hostlist_lock); @@ -750,96 +739,64 @@ void fcoe_watchdog(ulong vp) /** - * fcoe_check_wait_queue - put the skb into fcoe pending xmit queue + * fcoe_check_wait_queue() - put the skb into fcoe pending xmit queue * @lp: the fc_port for this skb * @skb: the associated skb to be xmitted * * This empties the wait_queue, dequeue the head of the wait_queue queue * and calls fcoe_start_io() for each packet, if all skb have been - * transmitted, return 0 if a error occurs, then restore wait_queue and - * try again later. + * transmitted, return qlen or -1 if a error occurs, then restore + * wait_queue and try again later. * * The wait_queue is used when the skb transmit fails. skb will go * in the wait_queue which will be emptied by the time function OR * by the next skb transmit. * * Returns: 0 for success - **/ + */ static int fcoe_check_wait_queue(struct fc_lport *lp) { - int rc, unpause = 0; - int paused = 0; + struct fcoe_softc *fc = lport_priv(lp); struct sk_buff *skb; - struct fcoe_softc *fc; + int rc = -1; - fc = fcoe_softc(lp); spin_lock_bh(&fc->fcoe_pending_queue.lock); + if (fc->fcoe_pending_queue_active) + goto out; + fc->fcoe_pending_queue_active = 1; - /* - * is this interface paused? - */ - if (fc->fcoe_pending_queue.qlen > FCOE_MAX_QUEUE_DEPTH) - paused = 1; - if (fc->fcoe_pending_queue.qlen) { - while ((skb = __skb_dequeue(&fc->fcoe_pending_queue)) != NULL) { - spin_unlock_bh(&fc->fcoe_pending_queue.lock); - rc = fcoe_start_io(skb); - if (rc) { - fcoe_insert_wait_queue_head(lp, skb); - return rc; - } - spin_lock_bh(&fc->fcoe_pending_queue.lock); - } - if (fc->fcoe_pending_queue.qlen < FCOE_MAX_QUEUE_DEPTH) - unpause = 1; - } - spin_unlock_bh(&fc->fcoe_pending_queue.lock); - if ((unpause) && (paused)) - fc_unpause(lp); - return fc->fcoe_pending_queue.qlen; -} - -/** - * fcoe_insert_wait_queue_head - puts skb to fcoe pending queue head - * @lp: the fc_port for this skb - * @skb: the associated skb to be xmitted - * - * Returns: none - **/ -static void fcoe_insert_wait_queue_head(struct fc_lport *lp, - struct sk_buff *skb) -{ - struct fcoe_softc *fc; + while (fc->fcoe_pending_queue.qlen) { + /* keep qlen > 0 until fcoe_start_io succeeds */ + fc->fcoe_pending_queue.qlen++; + skb = __skb_dequeue(&fc->fcoe_pending_queue); - fc = fcoe_softc(lp); - spin_lock_bh(&fc->fcoe_pending_queue.lock); - __skb_queue_head(&fc->fcoe_pending_queue, skb); - spin_unlock_bh(&fc->fcoe_pending_queue.lock); -} + spin_unlock_bh(&fc->fcoe_pending_queue.lock); + rc = fcoe_start_io(skb); + spin_lock_bh(&fc->fcoe_pending_queue.lock); -/** - * fcoe_insert_wait_queue - put the skb into fcoe pending queue tail - * @lp: the fc_port for this skb - * @skb: the associated skb to be xmitted - * - * Returns: none - **/ -static void fcoe_insert_wait_queue(struct fc_lport *lp, - struct sk_buff *skb) -{ - struct fcoe_softc *fc; + if (rc) { + __skb_queue_head(&fc->fcoe_pending_queue, skb); + /* undo temporary increment above */ + fc->fcoe_pending_queue.qlen--; + break; + } + /* undo temporary increment above */ + fc->fcoe_pending_queue.qlen--; + } - fc = fcoe_softc(lp); - spin_lock_bh(&fc->fcoe_pending_queue.lock); - __skb_queue_tail(&fc->fcoe_pending_queue, skb); + if (fc->fcoe_pending_queue.qlen < FCOE_LOW_QUEUE_DEPTH) + lp->qfull = 0; + fc->fcoe_pending_queue_active = 0; + rc = fc->fcoe_pending_queue.qlen; +out: spin_unlock_bh(&fc->fcoe_pending_queue.lock); + return rc; } /** - * fcoe_dev_setup - setup link change notification interface - * - **/ -static void fcoe_dev_setup(void) + * fcoe_dev_setup() - setup link change notification interface + */ +static void fcoe_dev_setup() { /* * here setup a interface specific wd time to @@ -849,15 +806,15 @@ static void fcoe_dev_setup(void) } /** - * fcoe_dev_setup - cleanup link change notification interface - **/ + * fcoe_dev_setup() - cleanup link change notification interface + */ static void fcoe_dev_cleanup(void) { unregister_netdevice_notifier(&fcoe_notifier); } /** - * fcoe_device_notification - netdev event notification callback + * fcoe_device_notification() - netdev event notification callback * @notifier: context of the notification * @event: type of event * @ptr: fixed array for output parsed ifname @@ -865,7 +822,7 @@ static void fcoe_dev_cleanup(void) * This function is called by the ethernet driver in case of link change event * * Returns: 0 for success - **/ + */ static int fcoe_device_notification(struct notifier_block *notifier, ulong event, void *ptr) { @@ -873,7 +830,7 @@ static int fcoe_device_notification(struct notifier_block *notifier, struct net_device *real_dev = ptr; struct fcoe_softc *fc; struct fcoe_dev_stats *stats; - u16 new_status; + u32 new_link_up; u32 mfs; int rc = NOTIFY_OK; @@ -890,17 +847,15 @@ static int fcoe_device_notification(struct notifier_block *notifier, goto out; } - new_status = lp->link_status; + new_link_up = lp->link_up; switch (event) { case NETDEV_DOWN: case NETDEV_GOING_DOWN: - new_status &= ~FC_LINK_UP; + new_link_up = 0; break; case NETDEV_UP: case NETDEV_CHANGE: - new_status &= ~FC_LINK_UP; - if (!fcoe_link_ok(lp)) - new_status |= FC_LINK_UP; + new_link_up = !fcoe_link_ok(lp); break; case NETDEV_CHANGEMTU: mfs = fc->real_dev->mtu - @@ -908,17 +863,15 @@ static int fcoe_device_notification(struct notifier_block *notifier, sizeof(struct fcoe_crc_eof)); if (mfs >= FC_MIN_MAX_FRAME) fc_set_mfs(lp, mfs); - new_status &= ~FC_LINK_UP; - if (!fcoe_link_ok(lp)) - new_status |= FC_LINK_UP; + new_link_up = !fcoe_link_ok(lp); break; case NETDEV_REGISTER: break; default: FC_DBG("unknown event %ld call", event); } - if (lp->link_status != new_status) { - if ((new_status & FC_LINK_UP) == FC_LINK_UP) + if (lp->link_up != new_link_up) { + if (new_link_up) fc_linkup(lp); else { stats = lp->dev_stats[smp_processor_id()]; @@ -933,12 +886,12 @@ out: } /** - * fcoe_if_to_netdev - parse a name buffer to get netdev + * fcoe_if_to_netdev() - parse a name buffer to get netdev * @ifname: fixed array for output parsed ifname * @buffer: incoming buffer to be copied * * Returns: NULL or ptr to netdeive - **/ + */ static struct net_device *fcoe_if_to_netdev(const char *buffer) { char *cp; @@ -955,13 +908,13 @@ static struct net_device *fcoe_if_to_netdev(const char *buffer) } /** - * fcoe_netdev_to_module_owner - finds out the nic drive moddule of the netdev + * fcoe_netdev_to_module_owner() - finds out the nic drive moddule of the netdev * @netdev: the target netdev * * Returns: ptr to the struct module, NULL for failure - **/ -static struct module *fcoe_netdev_to_module_owner( - const struct net_device *netdev) + */ +static struct module * +fcoe_netdev_to_module_owner(const struct net_device *netdev) { struct device *dev; @@ -979,12 +932,14 @@ static struct module *fcoe_netdev_to_module_owner( } /** - * fcoe_ethdrv_get - holds the nic driver module by try_module_get() for - * the corresponding netdev. + * fcoe_ethdrv_get() - Hold the Ethernet driver * @netdev: the target netdev * + * Holds the Ethernet driver module by try_module_get() for + * the corresponding netdev. + * * Returns: 0 for succsss - **/ + */ static int fcoe_ethdrv_get(const struct net_device *netdev) { struct module *owner; @@ -999,12 +954,14 @@ static int fcoe_ethdrv_get(const struct net_device *netdev) } /** - * fcoe_ethdrv_get - releases the nic driver module by module_put for - * the corresponding netdev. + * fcoe_ethdrv_put() - Release the Ethernet driver * @netdev: the target netdev * + * Releases the Ethernet driver module by module_put for + * the corresponding netdev. + * * Returns: 0 for succsss - **/ + */ static int fcoe_ethdrv_put(const struct net_device *netdev) { struct module *owner; @@ -1020,12 +977,12 @@ static int fcoe_ethdrv_put(const struct net_device *netdev) } /** - * fcoe_destroy- handles the destroy from sysfs + * fcoe_destroy() - handles the destroy from sysfs * @buffer: expcted to be a eth if name * @kp: associated kernel param * * Returns: 0 for success - **/ + */ static int fcoe_destroy(const char *buffer, struct kernel_param *kp) { int rc; @@ -1058,12 +1015,12 @@ out_nodev: } /** - * fcoe_create - handles the create call from sysfs + * fcoe_create() - Handles the create call from sysfs * @buffer: expcted to be a eth if name * @kp: associated kernel param * * Returns: 0 for success - **/ + */ static int fcoe_create(const char *buffer, struct kernel_param *kp) { int rc; @@ -1104,8 +1061,8 @@ module_param_call(destroy, fcoe_destroy, NULL, NULL, S_IWUSR); __MODULE_PARM_TYPE(destroy, "string"); MODULE_PARM_DESC(destroy, "Destroy fcoe port"); -/* - * fcoe_link_ok - check if link is ok for the fc_lport +/** + * fcoe_link_ok() - Check if link is ok for the fc_lport * @lp: ptr to the fc_lport * * Any permanently-disqualifying conditions have been previously checked. @@ -1120,7 +1077,7 @@ MODULE_PARM_DESC(destroy, "Destroy fcoe port"); */ int fcoe_link_ok(struct fc_lport *lp) { - struct fcoe_softc *fc = fcoe_softc(lp); + struct fcoe_softc *fc = lport_priv(lp); struct net_device *dev = fc->real_dev; struct ethtool_cmd ecmd = { ETHTOOL_GSET }; int rc = 0; @@ -1149,9 +1106,8 @@ int fcoe_link_ok(struct fc_lpo |