diff options
Diffstat (limited to 'drivers/staging/octeon/ethernet.c')
| -rw-r--r-- | drivers/staging/octeon/ethernet.c | 256 |
1 files changed, 106 insertions, 150 deletions
diff --git a/drivers/staging/octeon/ethernet.c b/drivers/staging/octeon/ethernet.c index 4cfd4b136b32..4a2161f70c7f 100644 --- a/drivers/staging/octeon/ethernet.c +++ b/drivers/staging/octeon/ethernet.c @@ -29,7 +29,6 @@ #include <linux/module.h> #include <linux/netdevice.h> #include <linux/etherdevice.h> -#include <linux/delay.h> #include <linux/phy.h> #include <net/dst.h> @@ -43,8 +42,6 @@ #include "ethernet-tx.h" #include "ethernet-mdio.h" #include "ethernet-util.h" -#include "ethernet-proc.h" - #include "cvmx-pip.h" #include "cvmx-pko.h" @@ -104,13 +101,15 @@ MODULE_PARM_DESC(pow_send_list, "\n" "\t\"eth2,spi3,spi7\" would cause these three devices to transmit\n" "\tusing the pow_send_group."); -static int disable_core_queueing = 1; -module_param(disable_core_queueing, int, 0444); -MODULE_PARM_DESC(disable_core_queueing, "\n" - "\tWhen set the networking core's tx_queue_len is set to zero. This\n" - "\tallows packets to be sent without lock contention in the packet\n" - "\tscheduler resulting in some cases in improved throughput.\n"); +int max_rx_cpus = -1; +module_param(max_rx_cpus, int, 0444); +MODULE_PARM_DESC(max_rx_cpus, "\n" + "\t\tThe maximum number of CPUs to use for packet reception.\n" + "\t\tUse -1 to use all available CPUs."); +int rx_napi_weight = 32; +module_param(rx_napi_weight, int, 0444); +MODULE_PARM_DESC(rx_napi_weight, "The NAPI WEIGHT parameter."); /* * The offset from mac_addr_base that should be used for the next port @@ -122,9 +121,16 @@ MODULE_PARM_DESC(disable_core_queueing, "\n" static unsigned int cvm_oct_mac_addr_offset; /** - * Periodic timer to check auto negotiation + * cvm_oct_poll_queue - Workqueue for polling operations. + */ +struct workqueue_struct *cvm_oct_poll_queue; + +/** + * cvm_oct_poll_queue_stopping - flag to indicate polling should stop. + * + * Set to one right before cvm_oct_poll_queue is destroyed. */ -static struct timer_list cvm_oct_poll_timer; +atomic_t cvm_oct_poll_queue_stopping = ATOMIC_INIT(0); /** * Array of every ethernet device owned by this driver indexed by @@ -132,65 +138,44 @@ static struct timer_list cvm_oct_poll_timer; */ struct net_device *cvm_oct_device[TOTAL_NUMBER_OF_PORTS]; -/** - * Periodic timer tick for slow management operations - * - * @arg: Device to check - */ -static void cvm_do_timer(unsigned long arg) +u64 cvm_oct_tx_poll_interval; + +static void cvm_oct_rx_refill_worker(struct work_struct *work); +static DECLARE_DELAYED_WORK(cvm_oct_rx_refill_work, cvm_oct_rx_refill_worker); + +static void cvm_oct_rx_refill_worker(struct work_struct *work) { - int32_t skb_to_free, undo; - int queues_per_port; - int qos; - struct octeon_ethernet *priv; - static int port; + /* + * FPA 0 may have been drained, try to refill it if we need + * more than num_packet_buffers / 2, otherwise normal receive + * processing will refill it. If it were drained, no packets + * could be received so cvm_oct_napi_poll would never be + * invoked to do the refill. + */ + cvm_oct_rx_refill_pool(num_packet_buffers / 2); - if (port >= CVMX_PIP_NUM_INPUT_PORTS) { - /* - * All ports have been polled. Start the next - * iteration through the ports in one second. - */ - port = 0; - mod_timer(&cvm_oct_poll_timer, jiffies + HZ); - return; - } - if (!cvm_oct_device[port]) - goto out; + if (!atomic_read(&cvm_oct_poll_queue_stopping)) + queue_delayed_work(cvm_oct_poll_queue, + &cvm_oct_rx_refill_work, HZ); +} + +static void cvm_oct_periodic_worker(struct work_struct *work) +{ + struct octeon_ethernet *priv = container_of(work, + struct octeon_ethernet, + port_periodic_work.work); - priv = netdev_priv(cvm_oct_device[port]); if (priv->poll) - priv->poll(cvm_oct_device[port]); - - queues_per_port = cvmx_pko_get_num_queues(port); - /* Drain any pending packets in the free list */ - for (qos = 0; qos < queues_per_port; qos++) { - if (skb_queue_len(&priv->tx_free_list[qos]) == 0) - continue; - skb_to_free = cvmx_fau_fetch_and_add32(priv->fau + qos * 4, - MAX_SKB_TO_FREE); - undo = skb_to_free > 0 ? - MAX_SKB_TO_FREE : skb_to_free + MAX_SKB_TO_FREE; - if (undo > 0) - cvmx_fau_atomic_add32(priv->fau+qos*4, -undo); - skb_to_free = -skb_to_free > MAX_SKB_TO_FREE ? - MAX_SKB_TO_FREE : -skb_to_free; - cvm_oct_free_tx_skbs(priv, skb_to_free, qos, 1); - } - cvm_oct_device[port]->netdev_ops->ndo_get_stats(cvm_oct_device[port]); + priv->poll(cvm_oct_device[priv->port]); -out: - port++; - /* Poll the next port in a 50th of a second. - This spreads the polling of ports out a little bit */ - mod_timer(&cvm_oct_poll_timer, jiffies + HZ / 50); -} + cvm_oct_device[priv->port]->netdev_ops->ndo_get_stats(cvm_oct_device[priv->port]); + + if (!atomic_read(&cvm_oct_poll_queue_stopping)) + queue_delayed_work(cvm_oct_poll_queue, &priv->port_periodic_work, HZ); + } -/** - * Configure common hardware for all interfaces - */ static __init void cvm_oct_configure_common_hw(void) { - int r; /* Setup the FPA */ cvmx_fpa_enable(); cvm_oct_mem_fill_fpa(CVMX_FPA_PACKET_POOL, CVMX_FPA_PACKET_POOL_SIZE, @@ -205,28 +190,13 @@ static __init void cvm_oct_configure_common_hw(void) cvmx_helper_setup_red(num_packet_buffers / 4, num_packet_buffers / 8); - /* Enable the MII interface */ - if (!octeon_is_simulation()) - cvmx_write_csr(CVMX_SMIX_EN(0), 1); - - /* Register an IRQ hander for to receive POW interrupts */ - r = request_irq(OCTEON_IRQ_WORKQ0 + pow_receive_group, - cvm_oct_do_interrupt, IRQF_SHARED, "Ethernet", - cvm_oct_device); - -#if defined(CONFIG_SMP) && 0 - if (USE_MULTICORE_RECEIVE) { - irq_set_affinity(OCTEON_IRQ_WORKQ0 + pow_receive_group, - cpu_online_mask); - } -#endif } /** - * Free a work queue entry received in a intercept callback. + * cvm_oct_free_work- Free a work queue entry + * + * @work_queue_entry: Work queue entry to free * - * @work_queue_entry: - * Work queue entry to free * Returns Zero on success, Negative on failure. */ int cvm_oct_free_work(void *work_queue_entry) @@ -253,9 +223,9 @@ int cvm_oct_free_work(void *work_queue_entry) EXPORT_SYMBOL(cvm_oct_free_work); /** - * Get the low level ethernet statistics - * + * cvm_oct_common_get_stats - get the low level ethernet statistics * @dev: Device to get the statistics from + * * Returns Pointer to the statistics */ static struct net_device_stats *cvm_oct_common_get_stats(struct net_device *dev) @@ -299,8 +269,7 @@ static struct net_device_stats *cvm_oct_common_get_stats(struct net_device *dev) } /** - * Change the link MTU. Unimplemented - * + * cvm_oct_common_change_mtu - change the link MTU * @dev: Device to change * @new_mtu: The new MTU * @@ -364,8 +333,7 @@ static int cvm_oct_common_change_mtu(struct net_device *dev, int new_mtu) } /** - * Set the multicast list. Currently unimplemented. - * + * cvm_oct_common_set_multicast_list - set the multicast list * @dev: Device to work on */ static void cvm_oct_common_set_multicast_list(struct net_device *dev) @@ -382,7 +350,7 @@ static void cvm_oct_common_set_multicast_list(struct net_device *dev) control.u64 = 0; control.s.bcst = 1; /* Allow broadcast MAC addresses */ - if (dev->mc_list || (dev->flags & IFF_ALLMULTI) || + if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI) || (dev->flags & IFF_PROMISC)) /* Force accept multicast packets */ control.s.mcst = 2; @@ -420,10 +388,10 @@ static void cvm_oct_common_set_multicast_list(struct net_device *dev) } /** - * Set the hardware MAC address for a device - * - * @dev: Device to change the MAC address for - * @addr: Address structure to change it too. MAC address is addr + 2. + * cvm_oct_common_set_mac_address - set the hardware MAC address for a device + * @dev: The device in question. + * @addr: Address structure to change it too. + * Returns Zero on success */ static int cvm_oct_common_set_mac_address(struct net_device *dev, void *addr) @@ -470,9 +438,9 @@ static int cvm_oct_common_set_mac_address(struct net_device *dev, void *addr) } /** - * Per network device initialization - * + * cvm_oct_common_init - per network device initialization * @dev: Device to initialize + * * Returns Zero on success */ int cvm_oct_common_init(struct net_device *dev) @@ -510,8 +478,11 @@ int cvm_oct_common_init(struct net_device *dev) && (always_use_pow || strstr(pow_send_list, dev->name))) priv->queue = -1; - if (priv->queue != -1 && USE_HW_TCPUDP_CHECKSUM) - dev->features |= NETIF_F_IP_CSUM; + if (priv->queue != -1) { + dev->features |= NETIF_F_SG; + if (USE_HW_TCPUDP_CHECKSUM) + dev->features |= NETIF_F_IP_CSUM; + } /* We do our own locking, Linux doesn't need to */ dev->features |= NETIF_F_LLTX; @@ -625,12 +596,6 @@ static const struct net_device_ops cvm_oct_pow_netdev_ops = { extern void octeon_mdiobus_force_mod_depencency(void); -/** - * Module/ driver initialization. Creates the linux network - * devices. - * - * Returns Zero on success - */ static int __init cvm_oct_init_module(void) { int num_interfaces; @@ -648,8 +613,12 @@ static int __init cvm_oct_init_module(void) else cvm_oct_mac_addr_offset = 0; - cvm_oct_proc_initialize(); - cvm_oct_rx_initialize(); + cvm_oct_poll_queue = create_singlethread_workqueue("octeon-ethernet"); + if (cvm_oct_poll_queue == NULL) { + pr_err("octeon-ethernet: Cannot create workqueue"); + return -ENOMEM; + } + cvm_oct_configure_common_hw(); cvmx_helper_initialize_packet_io_global(); @@ -682,6 +651,9 @@ static int __init cvm_oct_init_module(void) */ cvmx_fau_atomic_write32(FAU_NUM_PACKET_BUFFERS_TO_FREE, 0); + /* Initialize the FAU used for counting tx SKBs that need to be freed */ + cvmx_fau_atomic_write32(FAU_TOTAL_TX_TO_CLEAN, 0); + if ((pow_send_group != -1)) { struct net_device *dev; pr_info("\tConfiguring device for POW only access\n"); @@ -689,7 +661,6 @@ static int __init cvm_oct_init_module(void) if (dev) { /* Initialize the device private structure. */ struct octeon_ethernet *priv = netdev_priv(dev); - memset(priv, 0, sizeof(struct octeon_ethernet)); dev->netdev_ops = &cvm_oct_pow_netdev_ops; priv->imode = CVMX_HELPER_INTERFACE_MODE_DISABLED; @@ -700,19 +671,16 @@ static int __init cvm_oct_init_module(void) skb_queue_head_init(&priv->tx_free_list[qos]); if (register_netdev(dev) < 0) { - pr_err("Failed to register ethernet " - "device for POW\n"); + pr_err("Failed to register ethernet device for POW\n"); kfree(dev); } else { cvm_oct_device[CVMX_PIP_NUM_INPUT_PORTS] = dev; - pr_info("%s: POW send group %d, receive " - "group %d\n", - dev->name, pow_send_group, - pow_receive_group); + pr_info("%s: POW send group %d, receive group %d\n", + dev->name, pow_send_group, + pow_receive_group); } } else { - pr_err("Failed to allocate ethernet device " - "for POW\n"); + pr_err("Failed to allocate ethernet device for POW\n"); } } @@ -730,17 +698,15 @@ static int __init cvm_oct_init_module(void) struct net_device *dev = alloc_etherdev(sizeof(struct octeon_ethernet)); if (!dev) { - pr_err("Failed to allocate ethernet device " - "for port %d\n", port); + pr_err("Failed to allocate ethernet device for port %d\n", port); continue; } - if (disable_core_queueing) - dev->tx_queue_len = 0; /* Initialize the device private structure. */ priv = netdev_priv(dev); - memset(priv, 0, sizeof(struct octeon_ethernet)); + INIT_DELAYED_WORK(&priv->port_periodic_work, + cvm_oct_periodic_worker); priv->imode = imode; priv->port = port; priv->queue = cvmx_pko_get_base_queue(priv->port); @@ -803,44 +769,25 @@ static int __init cvm_oct_init_module(void) fau -= cvmx_pko_get_num_queues(priv->port) * sizeof(uint32_t); + queue_delayed_work(cvm_oct_poll_queue, + &priv->port_periodic_work, HZ); } } } - if (INTERRUPT_LIMIT) { - /* - * Set the POW timer rate to give an interrupt at most - * INTERRUPT_LIMIT times per second. - */ - cvmx_write_csr(CVMX_POW_WQ_INT_PC, - octeon_bootinfo->eclock_hz / (INTERRUPT_LIMIT * - 16 * 256) << 8); + cvm_oct_tx_initialize(); + cvm_oct_rx_initialize(); - /* - * Enable POW timer interrupt. It will count when - * there are packets available. - */ - cvmx_write_csr(CVMX_POW_WQ_INT_THRX(pow_receive_group), - 0x1ful << 24); - } else { - /* Enable POW interrupt when our port has at least one packet */ - cvmx_write_csr(CVMX_POW_WQ_INT_THRX(pow_receive_group), 0x1001); - } + /* + * 150 uS: about 10 1500-byte packtes at 1GE. + */ + cvm_oct_tx_poll_interval = 150 * (octeon_get_clock_rate() / 1000000); - /* Enable the poll timer for checking RGMII status */ - init_timer(&cvm_oct_poll_timer); - cvm_oct_poll_timer.data = 0; - cvm_oct_poll_timer.function = cvm_do_timer; - mod_timer(&cvm_oct_poll_timer, jiffies + HZ); + queue_delayed_work(cvm_oct_poll_queue, &cvm_oct_rx_refill_work, HZ); return 0; } -/** - * Module / driver shutdown - * - * Returns Zero on success - */ static void __exit cvm_oct_cleanup_module(void) { int port; @@ -853,22 +800,31 @@ static void __exit cvm_oct_cleanup_module(void) /* Free the interrupt handler */ free_irq(OCTEON_IRQ_WORKQ0 + pow_receive_group, cvm_oct_device); - del_timer(&cvm_oct_poll_timer); + atomic_inc_return(&cvm_oct_poll_queue_stopping); + cancel_delayed_work_sync(&cvm_oct_rx_refill_work); + cvm_oct_rx_shutdown(); + cvm_oct_tx_shutdown(); + cvmx_pko_disable(); /* Free the ethernet devices */ for (port = 0; port < TOTAL_NUMBER_OF_PORTS; port++) { if (cvm_oct_device[port]) { - cvm_oct_tx_shutdown(cvm_oct_device[port]); - unregister_netdev(cvm_oct_device[port]); - kfree(cvm_oct_device[port]); + struct net_device *dev = cvm_oct_device[port]; + struct octeon_ethernet *priv = netdev_priv(dev); + cancel_delayed_work_sync(&priv->port_periodic_work); + + cvm_oct_tx_shutdown_dev(dev); + unregister_netdev(dev); + kfree(dev); cvm_oct_device[port] = NULL; } } + destroy_workqueue(cvm_oct_poll_queue); + cvmx_pko_shutdown(); - cvm_oct_proc_shutdown(); cvmx_ipd_free_ptr(); |