diff options
Diffstat (limited to 'drivers/misc/mic/scif/scif_main.c')
| -rw-r--r-- | drivers/misc/mic/scif/scif_main.c | 88 |
1 files changed, 19 insertions, 69 deletions
diff --git a/drivers/misc/mic/scif/scif_main.c b/drivers/misc/mic/scif/scif_main.c index 6ce851f5c7e6..f90bd06900cb 100644 --- a/drivers/misc/mic/scif/scif_main.c +++ b/drivers/misc/mic/scif/scif_main.c @@ -80,35 +80,6 @@ irqreturn_t scif_intr_handler(int irq, void *data) return IRQ_HANDLED; } -static int scif_peer_probe(struct scif_peer_dev *spdev) -{ - struct scif_dev *scifdev = &scif_dev[spdev->dnode]; - - mutex_lock(&scif_info.conflock); - scif_info.total++; - scif_info.maxid = max_t(u32, spdev->dnode, scif_info.maxid); - mutex_unlock(&scif_info.conflock); - rcu_assign_pointer(scifdev->spdev, spdev); - - /* In the future SCIF kernel client devices will be added here */ - return 0; -} - -static void scif_peer_remove(struct scif_peer_dev *spdev) -{ - struct scif_dev *scifdev = &scif_dev[spdev->dnode]; - - /* In the future SCIF kernel client devices will be removed here */ - spdev = rcu_dereference(scifdev->spdev); - if (spdev) - RCU_INIT_POINTER(scifdev->spdev, NULL); - synchronize_rcu(); - - mutex_lock(&scif_info.conflock); - scif_info.total--; - mutex_unlock(&scif_info.conflock); -} - static void scif_qp_setup_handler(struct work_struct *work) { struct scif_dev *scifdev = container_of(work, struct scif_dev, @@ -139,20 +110,13 @@ static void scif_qp_setup_handler(struct work_struct *work) } } -static int scif_setup_scifdev(struct scif_hw_dev *sdev) +static int scif_setup_scifdev(void) { + /* We support a maximum of 129 SCIF nodes including the mgmt node */ +#define MAX_SCIF_NODES 129 int i; - u8 num_nodes; + u8 num_nodes = MAX_SCIF_NODES; - if (sdev->snode) { - struct mic_bootparam __iomem *bp = sdev->rdp; - - num_nodes = ioread8(&bp->tot_nodes); - } else { - struct mic_bootparam *bp = sdev->dp; - - num_nodes = bp->tot_nodes; - } scif_dev = kcalloc(num_nodes, sizeof(*scif_dev), GFP_KERNEL); if (!scif_dev) return -ENOMEM; @@ -163,7 +127,7 @@ static int scif_setup_scifdev(struct scif_hw_dev *sdev) scifdev->exit = OP_IDLE; init_waitqueue_head(&scifdev->disconn_wq); mutex_init(&scifdev->lock); - INIT_WORK(&scifdev->init_msg_work, scif_qp_response_ack); + INIT_WORK(&scifdev->peer_add_work, scif_add_peer_device); INIT_DELAYED_WORK(&scifdev->p2p_dwork, scif_poll_qp_state); INIT_DELAYED_WORK(&scifdev->qp_dwork, @@ -181,27 +145,21 @@ static void scif_destroy_scifdev(void) static int scif_probe(struct scif_hw_dev *sdev) { - struct scif_dev *scifdev; + struct scif_dev *scifdev = &scif_dev[sdev->dnode]; int rc; dev_set_drvdata(&sdev->dev, sdev); + scifdev->sdev = sdev; + if (1 == atomic_add_return(1, &g_loopb_cnt)) { - struct scif_dev *loopb_dev; + struct scif_dev *loopb_dev = &scif_dev[sdev->snode]; - rc = scif_setup_scifdev(sdev); - if (rc) - goto exit; - scifdev = &scif_dev[sdev->dnode]; - scifdev->sdev = sdev; - loopb_dev = &scif_dev[sdev->snode]; loopb_dev->sdev = sdev; rc = scif_setup_loopback_qp(loopb_dev); if (rc) - goto free_sdev; - } else { - scifdev = &scif_dev[sdev->dnode]; - scifdev->sdev = sdev; + goto exit; } + rc = scif_setup_intr_wq(scifdev); if (rc) goto destroy_loopb; @@ -237,8 +195,6 @@ destroy_intr: destroy_loopb: if (atomic_dec_and_test(&g_loopb_cnt)) scif_destroy_loopback_qp(&scif_dev[sdev->snode]); -free_sdev: - scif_destroy_scifdev(); exit: return rc; } @@ -290,13 +246,6 @@ static void scif_remove(struct scif_hw_dev *sdev) scifdev->sdev = NULL; } -static struct scif_peer_driver scif_peer_driver = { - .driver.name = KBUILD_MODNAME, - .driver.owner = THIS_MODULE, - .probe = scif_peer_probe, - .remove = scif_peer_remove, -}; - static struct scif_hw_dev_id id_table[] = { { MIC_SCIF_DEV, SCIF_DEV_ANY_ID }, { 0 }, @@ -312,6 +261,8 @@ static struct scif_driver scif_driver = { static int _scif_init(void) { + int rc; + spin_lock_init(&scif_info.eplock); spin_lock_init(&scif_info.nb_connect_lock); spin_lock_init(&scif_info.port_lock); @@ -326,10 +277,15 @@ static int _scif_init(void) init_waitqueue_head(&scif_info.exitwq); scif_info.en_msg_log = 0; scif_info.p2p_enable = 1; + rc = scif_setup_scifdev(); + if (rc) + goto error; INIT_WORK(&scif_info.misc_work, scif_misc_handler); INIT_WORK(&scif_info.conn_work, scif_conn_handler); idr_init(&scif_ports); return 0; +error: + return rc; } static void _scif_exit(void) @@ -347,12 +303,9 @@ static int __init scif_init(void) rc = scif_peer_bus_init(); if (rc) goto exit; - rc = scif_peer_register_driver(&scif_peer_driver); - if (rc) - goto peer_bus_exit; rc = scif_register_driver(&scif_driver); if (rc) - goto unreg_scif_peer; + goto peer_bus_exit; rc = misc_register(mdev); if (rc) goto unreg_scif; @@ -360,8 +313,6 @@ static int __init scif_init(void) return 0; unreg_scif: scif_unregister_driver(&scif_driver); -unreg_scif_peer: - scif_peer_unregister_driver(&scif_peer_driver); peer_bus_exit: scif_peer_bus_exit(); exit: @@ -374,7 +325,6 @@ static void __exit scif_exit(void) scif_exit_debugfs(); misc_deregister(&scif_info.mdev); scif_unregister_driver(&scif_driver); - scif_peer_unregister_driver(&scif_peer_driver); scif_peer_bus_exit(); _scif_exit(); } |