/* * FUJITSU Extended Socket Network Device driver * Copyright (c) 2015 FUJITSU LIMITED * * This program is free software; you can redistribute it and/or modify it * under the terms and conditions of the GNU General Public License, * version 2, as published by the Free Software Foundation. * * This program is distributed in the hope it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for * more details. * * You should have received a copy of the GNU General Public License along with * this program; if not, see . * * The full GNU General Public License is included in this distribution in * the file called "COPYING". * */ #include #include #include #include #include #include #include "fjes.h" #include "fjes_trace.h" #define MAJ 1 #define MIN 2 #define DRV_VERSION __stringify(MAJ) "." __stringify(MIN) #define DRV_NAME "fjes" char fjes_driver_name[] = DRV_NAME; char fjes_driver_version[] = DRV_VERSION; static const char fjes_driver_string[] = "FUJITSU Extended Socket Network Device Driver"; static const char fjes_copyright[] = "Copyright (c) 2015 FUJITSU LIMITED"; MODULE_AUTHOR("Taku Izumi "); MODULE_DESCRIPTION("FUJITSU Extended Socket Network Device Driver"); MODULE_LICENSE("GPL"); MODULE_VERSION(DRV_VERSION); #define ACPI_MOTHERBOARD_RESOURCE_HID "PNP0C02" static int fjes_request_irq(struct fjes_adapter *); static void fjes_free_irq(struct fjes_adapter *); static int fjes_open(struct net_device *); static int fjes_close(struct net_device *); static int fjes_setup_resources(struct fjes_adapter *); static void fjes_free_resources(struct fjes_adapter *); static netdev_tx_t fjes_xmit_frame(struct sk_buff *, struct net_device *); static void fjes_raise_intr_rxdata_task(struct work_struct *); static void fjes_tx_stall_task(struct work_struct *); static void fjes_force_close_task(struct work_struct *); static irqreturn_t fjes_intr(int, void*); static void fjes_get_stats64(struct net_device *, struct rtnl_link_stats64 *); static int fjes_change_mtu(struct net_device *, int); static int fjes_vlan_rx_add_vid(struct net_device *, __be16 proto, u16); static int fjes_vlan_rx_kill_vid(struct net_device *, __be16 proto, u16); static void fjes_tx_retry(struct net_device *); static int fjes_acpi_add(struct acpi_device *); static int fjes_acpi_remove(struct acpi_device *); static acpi_status fjes_get_acpi_resource(struct acpi_resource *, void*); static int fjes_probe(struct platform_device *); static int fjes_remove(struct platform_device *); static int fjes_sw_init(struct fjes_adapter *); static void fjes_netdev_setup(struct net_device *); static void fjes_irq_watch_task(struct work_struct *); static void fjes_watch_unshare_task(struct work_struct *); static void fjes_rx_irq(struct fjes_adapter *, int); static int fjes_poll(struct napi_struct *, int); static const struct acpi_device_id fjes_acpi_ids[] = { {ACPI_MOTHERBOARD_RESOURCE_HID, 0}, {"", 0}, }; MODULE_DEVICE_TABLE(acpi, fjes_acpi_ids); static struct acpi_driver fjes_acpi_driver = { .name = DRV_NAME, .class = DRV_NAME, .owner = THIS_MODULE, .ids = fjes_acpi_ids, .ops = { .add = fjes_acpi_add, .remove = fjes_acpi_remove, }, }; static struct platform_driver fjes_driver = { .driver = { .name = DRV_NAME, }, .probe = fjes_probe, .remove = fjes_remove, }; static struct resource fjes_resource[] = { { .flags = IORESOURCE_MEM, .start = 0, .end = 0, }, { .flags = IORESOURCE_IRQ, .start = 0, .end = 0, }, }; static bool is_extended_socket_device(struct acpi_device *device) { struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL}; char str_buf[sizeof(FJES_ACPI_SYMBOL) + 1]; union acpi_object *str; acpi_status status; int result; status = acpi_evaluate_object(device->handle, "_STR", NULL, &buffer); if (ACPI_FAILURE(status)) return false; str = buffer.pointer; result = utf16s_to_utf8s((wchar_t *)str->string.pointer, str->string.length, UTF16_LITTLE_ENDIAN, str_buf, sizeof(str_buf) - 1); str_buf[result] = 0; if (strncmp(FJES_ACPI_SYMBOL, str_buf, strlen(FJES_ACPI_SYMBOL)) != 0) { kfree(buffer.pointer); return false; } kfree(buffer.pointer); return true; } static int acpi_check_extended_socket_status(struct acpi_device *device) { unsigned long long sta; acpi_status status; status = acpi_evaluate_integer(device->handle, "_STA", NULL, &sta); if (ACPI_FAILURE(status)) return -ENODEV; if (!((sta & ACPI_STA_DEVICE_PRESENT) && (sta & ACPI_STA_DEVICE_ENABLED) && (sta & ACPI_STA_DEVICE_UI) && (sta & ACPI_STA_DEVICE_FUNCTIONING))) return -ENODEV; return 0; } static int fjes_acpi_add(struct acpi_device *device) { struct platform_device *plat_dev; acpi_status status; if (!is_extended_socket_device(device)) return -ENODEV; if (acpi_check_extended_socket_status(device)) return -ENODEV; status = acpi_walk_resources(device->handle, METHOD_NAME__CRS, fjes_get_acpi_resource, fjes_resource); if (ACPI_FAILURE(status)) return -ENODEV; /* create platform_device */ plat_dev = platform_device_register_simple(DRV_NAME, 0, fjes_resource, ARRAY_SIZE(fjes_resource)); if (IS_ERR(plat_dev)) return PTR_ERR(plat_dev); device->driver_data = plat_dev; return 0; } static int fjes_acpi_remove(struct acpi_device *device) { struct platform_device *plat_dev; plat_dev = (struct platform_device *)acpi_driver_data(device); platform_device_unregister(plat_dev); return 0; } static acpi_status fjes_get_acpi_resource(struct acpi_resource *acpi_res, void *data) { struct acpi_resource_address32 *addr; struct acpi_resource_irq *irq; struct resource *res = data; switch (acpi_res->type) { case ACPI_RESOURCE_TYPE_ADDRESS32: addr = &acpi_res->data.address32; res[0].start = addr->address.minimum; res[0].end = addr->address.minimum + addr->address.address_length - 1; break; case ACPI_RESOURCE_TYPE_IRQ: irq = &acpi_res->data.irq; if (irq->interrupt_count != 1) return AE_ERROR; res[1].start = irq->interrupts[0]; res[1].end = irq->interrupts[0]; break; default: break; } return AE_OK; } static int fjes_request_irq(struct fjes_adapter *adapter) { struct net_device *netdev = adapter->netdev; int result = -1; adapter->interrupt_watch_enable = true; if (!delayed_work_pending(&adapter->interrupt_watch_task)) { queue_delayed_work(adapter->control_wq, &adapter->interrupt_watch_task, FJES_IRQ_WATCH_DELAY); } if (!adapter->irq_registered) { result = request_irq(adapter->hw.hw_res.irq, fjes_intr, IRQF_SHARED, netdev->name, adapter); if (result) adapter->irq_registered = false; else adapter->irq_registered = true; } return result; } static void fjes_free_irq(struct fjes_adapter *adapter) { struct fjes_hw *hw = &adapter->hw; adapter->interrupt_watch_enable = false; cancel_delayed_work_sync(&adapter->interrupt_watch_task); fjes_hw_set_irqmask(hw, REG_ICTL_MASK_ALL, true); if (adapter->irq_registered) { free_irq(adapter->hw.hw_res.irq, adapter); adapter->irq_registered = false; } } static const struct net_device_ops fjes_netdev_ops = { .ndo_open = fjes_open, .ndo_stop = fjes_close, .ndo_start_xmit = fjes_xmit_frame, .ndo_get_stats64 = fjes_get_stats64, .ndo_change_mtu = fjes_change_mtu, .ndo_tx_timeout = fjes_tx_retry, .ndo_vlan_rx_add_vid = fjes_vlan_rx_add_vid, .ndo_vlan_rx_kill_vid = fjes_vlan_rx_kill_vid, }; /* fjes_open - Called when a network interface is made active */ static int fjes_open(struct net_device *netdev) { struct fjes_adapter *adapter = netdev_priv(netdev); struct fjes_hw *hw = &adapter->hw; int result; if (adapter->open_guard) return -ENXIO; result = fjes_setup_resources(adapter); if (result) goto err_setup_res; hw->txrx_stop_req_bit = 0; hw->epstop_req_bit = 0; napi_enable(&adapter->napi); fjes_hw_capture_interrupt_status(hw); result = fjes_request_irq(adapter); if (result) goto err_req_irq; fjes_hw_set_irqmask(hw, REG_ICTL_MASK_ALL, false); netif_tx_start_all_queues(netdev); netif_carrier_on(netdev); return 0; err_req_irq: fjes_free_irq(adapter); napi_disable(&adapter->napi); err_setup_res: fjes_free_resources(adapter); return result; } /* fjes_close - Disables a network interface */ static int fjes_close(struct net_device *netdev) { struct fjes_adapter *adapter = netdev_priv(netdev); struct fjes_hw *hw = &adapter->hw; unsigned long flags; int epidx; netif_tx_stop_all_queues(netdev); netif_carrier_off(netdev); fjes_hw_raise_epstop(hw); napi_disable(&adapter->napi); spin_lock_irqsave(&hw->rx_status_lock, flags); for (epidx = 0; epidx < hw->max_epid; epidx++) { if (epidx == hw->my_epid) continue; if (fjes_hw_get_partner_ep_status(hw, epidx) == EP_PARTNER_SHARED) adapter->hw.ep_shm_info[epidx] .tx.info->v1i.rx_status &= ~FJES_RX_POLL_WORK; } spin_unlock_irqrestore(&hw->rx_status_lock, flags); fjes_free_irq(adapter); cancel_delayed_work_sync(&adapter->interrupt_watch_task); cancel_work_sync(&adapter->unshare_watch_task); adapter->unshare_watch_bitmask = 0; cancel_work_sync(&adapter->raise_intr_rxdata_task); cancel_work_sync(&adapter->tx_stall_task); cancel_work_sync(&hw->update_zone_task); cancel_work_sync(&hw->epstop_task); fjes_hw_wait_epstop(hw); fjes_free_resources(adapter); return 0; } static int fjes_setup_resources(struct fjes_adapter *adapter) { struct net_device *netdev = adapter->netdev; struct ep_share_mem_info *buf_pair; struct fjes_hw *hw = &adapter->hw; unsigned long flags; int result; int epidx; mutex_lock(&hw->hw_info.lock); result = fjes_hw_request_info(hw); switch (result) { case 0: for (epidx = 0; epidx < hw->max_epid; epidx++) { hw->ep_shm_info[epidx].es_status = hw->hw_info.res_buf->info.info[epidx].es_status; hw->ep_shm_info[epidx].zone = hw->hw_info.res_buf->info.info[epidx].zone; } break; default: case -ENOMSG: case -EBUSY: adapter->force_reset = true; mutex_unlock(&hw->hw_info.lock); return result; } mutex_unlock(&hw->hw_info.lock); for (epidx = 0; epidx < (hw->max_epid); epidx++) { if ((epidx != hw->my_epid) && (hw->ep_shm_info[epidx].es_status == FJES_ZONING_STATUS_ENABLE)) { fjes_hw_raise_interrupt(hw, epidx, REG_ICTL_MASK_INFO_UPDATE); hw->ep_shm_info[epidx].ep_stats .send_intr_zoneupdate += 1; } } msleep(FJES_OPEN_ZONE_UPDATE_WAIT * hw->max_epid); for (epidx = 0; epidx < (hw->max_epid); epidx++) { if (epidx == hw->my_epid) continue; buf_pair = &hw->ep_shm_info[epidx]; spin_lock_irqsave(&hw->rx_status_lock, flags); fjes_hw_setup_epbuf(&buf_pair->tx, netdev->dev_addr, netdev->mtu); spin_unlock_irqrestore(&hw->rx_status_lock, flags); if (fjes_hw_epid_is_same_zone(hw, epidx)) { mutex_lock(&hw->hw_info.lock); result = fjes_hw_register_buff_addr(hw, epidx, buf_pair); mutex_unlock(&hw->hw_info.lock); switch (result) { case 0: break; case -ENOMSG: case -EBUSY: default: adapter->force_reset = true; return result; } hw->ep_shm_info[epidx].ep_stats .com_regist_buf_exec += 1; } } return 0; } static void fjes_free_resources(struct fjes_adapter *adapter) { struct net_device *netdev = adapter->netdev; struct fjes_device_command_param param; struct ep_share_mem_info *buf_pair; struct fjes_hw *hw = &adapter->hw; bool reset_flag = false; unsigned long flags; int result; int epidx; for (epidx = 0; epidx < hw->max_epid; epidx++) { if (epidx == hw->my_epid) continue; mutex_lock(&hw->hw_info.lock); result = fjes_hw_unregister_buff_addr(hw, epidx); mutex_unlock(&hw->hw_info.lock); hw->ep_shm_info[epidx].ep_stats.com_unregist_buf_exec += 1; if (result) reset_flag = true; buf_pair = &hw->ep_shm_info[epidx]; spin_lock_irqsave(&hw->rx_status_lock, flags); fjes_hw_setup_epbuf(&buf_pair->tx, netdev->dev_addr, netdev->mtu); spin_unlock_irqrestore(&hw->rx_status_lock, flags); clear_bit(epidx, &hw->txrx_stop_req_bit); } if (reset_flag || adapter->force_reset) { result = fjes_hw_reset(hw); adapter->force_reset = false; if (result) adapter->open_guard = true; hw->hw_info.buffer_share_bit = 0; memset((void *)¶m, 0, sizeof(param)); param.req_len = hw->hw_info.req_buf_size; param.req_start = __pa(hw->hw_info.req_buf); param.res_len = hw->hw_info.res_buf_size; param.res_start = __pa(hw->hw_info.res_buf); param.share_start = __pa(hw->hw_info.share->ep_status); fjes_hw_init_command_registers(hw, ¶m); } } static void fjes_tx_stall_task(struct work_struct *work) { struct fjes_adapter *adapter = container_of(work, struct fjes_adapter, tx_stall_task); struct net_device *netdev = adapter->netdev; struct fjes_hw *hw = &adapter->hw; int all_queue_available, sendable; enum ep_partner_status pstatus; int max_epid, my_epid, epid; union ep_buffer_info *info; int i; if (((long)jiffies - dev_trans_start(netdev)) > FJES_TX_TX_STALL_TIMEOUT) { netif_wake_queue(netdev); return; } my_epid = hw->my_epid; max_epid = hw->max_epid; for (i = 0; i < 5; i++) { all_queue_available = 1; for (epid = 0; epid < max_epid; epid++) { if (my_epid == epid) continue; pstatus = fjes_hw_get_partner_ep_status(hw, epid); sendable = (pstatus == EP_PARTNER_SHARED); if (!sendable) continue; info = adapter->hw.ep_shm_info[epid].tx.info; if (!(info->v1i.rx_status & FJES_RX_MTU_CHANGING_DONE)) return; if (EP_RING_FULL(info->v1i.head, info->v1i.tail, info->v1i.count_max)) { all_queue_available = 0; break; } } if (all_queue_available) { netif_wake_queue(netdev); return; } } usleep_range(50, 100); queue_work(adapter->txrx_wq, &adapter->tx_stall_task); } static void fjes_force_close_task(struct work_struct *work) { struct fjes_adapter *adapter = container_of(work, struct fjes_adapter, force_close_task); struct net_device *netdev = adapter->netdev; rtnl_lock(); dev_close(netdev); rtnl_unlock(); } static void fjes_raise_intr_rxdata_task(struct work_struct *work) { struct fjes_adapter *adapter = container_of(work, struct fjes_adapter, raise_intr_rxdata_task); struct fjes_hw *hw = &adapter->hw; enum ep_partner_status pstatus; int max_epid, my_epid, epid; my_epid = hw->my_epid; max_epid = hw->max_epid; for (epid = 0; epid < max_epid; epid++) hw->ep_shm_info[epid].tx_status_work = 0; for (epid = 0; epid < max_epid; epid++) { if (epid == my_epid) continue; pstatus = fjes_hw_get_partner_ep_status(hw, epid); if (pstatus == EP_PARTNER_SHARED) { hw->ep_shm_info[epid].tx_status_work = hw->ep_shm_info[epid].tx.info->v1i.tx_status; if (hw->ep_shm_info[epid].tx_status_work == FJES_TX_DELAY_SEND_PENDING) { hw->ep_shm_info[epid].tx.info->v1i.tx_status = FJES_TX_DELAY_SEND_NONE; } } } for (epid = 0; epid < max_epid; epid++) { if (epid == my_epid) continue; pstatus = fjes_hw_get_partner_ep_status(hw, epid); if ((hw->ep_shm_info[epid].tx_status_work == FJES_TX_DELAY_SEND_PENDING) && (pstatus == EP_PARTNER_SHARED) && !(hw->ep_shm_info[epid].rx.info->v1i.rx_status & FJES_RX_POLL_WORK)) { fjes_hw_raise_interrupt(hw, epid, REG_ICTL_MASK_RX_DATA); hw->ep_shm_info[epid].ep_stats.send_intr_rx += 1; } } usleep_range(500, 1000); } static int fjes_tx_send(struct fjes_adapter *adapter, int dest, void *data, size_t len) { int retval; retval = fjes_hw_epbuf_tx_pkt_send(&adapter->hw.ep_shm_info[dest].tx, data, len); if (retval) return retval; adapter->hw.ep_shm_info[dest].tx.info->v1i.tx_status = FJES_TX_DELAY_SEND_PENDING; if (!work_pending(&adapter->raise_intr_rxdata_task)) queue_work(adapter->txrx_wq, &adapter->raise_intr_rxdata_task); retval = 0; return retval; } static netdev_tx_t fjes_xmit_frame(struct sk_buff *skb, struct net_device *netdev) { struct fjes_adapter *adapter = netdev_priv(netdev); struct fjes_hw *hw = &adapter->hw; int max_epid, my_epid, dest_epid; enum ep_partner_status pstatus; struct netdev_queue *cur_queue; char shortpkt[VLAN_ETH_HLEN]; bool is_multi, vlan; struct ethhdr *eth; u16 queue_no = 0; u16 vlan_id = 0; netdev_tx_t ret; char *data; int len; ret = NETDEV_TX_OK; is_multi = false; cur_queue = netdev_get_tx_queue(netdev, queue_no); eth = (struct ethhdr *)skb->data; my_epid = hw->my_epid; vlan = (vlan_get_tag(skb, &vlan_id) == 0) ? true : false; data = skb->data; len = skb->len; if (is_multicast_ether_addr(eth->h_dest)) { dest_epid = 0; max_epid = hw->max_epid; is_multi = true; } else if (is_local_ether_addr(eth->h_dest)) { dest_epid = eth->h_dest[ETH_ALEN - 1]; max_epid = dest_epid + 1; if ((eth->h_dest[0] == 0x02) && (0x00 == (eth->h_dest[1] | eth->h_dest[2] | eth->h_dest[3] | eth->h_dest[4])) && (dest_epid < hw->max_epid)) { ; } else { dest_epid = 0; max_epid = 0; ret = NETDEV_TX_OK; adapter->stats64.tx_packets += 1; hw->ep_shm_info[my_epid].net_stats.tx_packets += 1; adapter->stats64.tx_bytes += len; hw->ep_shm_info[my_epid].net_stats.tx_bytes += len; } } else { dest_epid = 0; max_epid = 0; ret = NETDEV_TX_OK; adapter->stats64.tx_packets += 1; hw->ep_shm_info[my_epid].net_stats.tx_packets += 1; adapter->stats64.tx_bytes += len; hw->ep_shm_info[my_epid].net_stats.tx_bytes += len; } for (; dest_epid < max_epid; dest_epid++) { if (my_epid == dest_epid) continue; pstatus = fjes_hw_get_partner_ep_status(hw, dest_epid); if (pstatus != EP_PARTNER_SHARED) { if (!is_multi) hw->ep_shm_info[dest_epid].ep_stats .tx_dropped_not_shared += 1; ret = NETDEV_TX_OK; } else if (!fjes_hw_check_epbuf_version( &adapter->hw.ep_shm_info[dest_epid].rx, 0)) { /* version is NOT 0 */ adapter->stats64.tx_carrier_errors += 1; hw->ep_shm_info[dest_epid].net_stats .tx_carrier_errors += 1; hw->ep_shm_info[dest_epid].ep_stats .tx_dropped_ver_mismatch += 1; ret = NETDEV_TX_OK; } else if (!fjes_hw_check_mtu( &adapter->hw.ep_shm_info[dest_epid].rx, netdev->mtu)) { adapter->stats64.tx_dropped += 1; hw->ep_shm_info[dest_epid].net_stats.tx_dropped += 1; adapter->stats64.tx_errors += 1; hw->ep_shm_info[dest_epid].net_stats.tx_errors += 1; hw->ep_shm_info[dest_epid].ep_stats .tx_dropped_buf_size_mismatch += 1; ret = NETDEV_TX_OK; } else if (vlan && !fjes_hw_check_vlan_id( &adapter->hw.ep_shm_info[dest_epid].rx, vlan_id)) { hw->ep_shm_info[dest_epid].ep_stats .tx_dropped_vlanid_mismatch += 1; ret = NETDEV_TX_OK; } else { if (len < VLAN_ETH_HLEN) { memset(shortpkt, 0, VLAN_ETH_HLEN); memcpy(shortpkt, skb->data, skb->len); len = VLAN_ETH_HLEN; data = shortpkt; } if (adapter->tx_retry_count == 0) { adapter->tx_start_jiffies = jiffies; adapter->tx_retry_count = 1; } else { adapter->tx_retry_count++; } if (fjes_tx_send(adapter, dest_epid, data, len)) { if (is_multi) { ret = NETDEV_TX_OK; } else if ( ((long)jiffies - (long)adapter->tx_start_jiffies) >= FJES_TX_RETRY_TIMEOUT) { adapter->stats64.tx_fifo_errors += 1; hw->ep_shm_info[dest_epid].net_stats .tx_fifo_errors += 1; adapter->stats64.tx_errors += 1; hw->ep_shm_info[dest_epid].net_stats .tx_errors += 1; ret = NETDEV_TX_OK; } else { netif_trans_update(netdev); hw->ep_shm_info[dest_epid].ep_stats .tx_buffer_full += 1; netif_tx_stop_queue(cur_queue); if (!work_pending(&adapter->tx_stall_task)) queue_work(adapter->txrx_wq, &adapter->tx_stall_task); ret = NETDEV_TX_BUSY; } } else { if (!is_multi) { adapter->stats64.tx_packets += 1; hw->ep_shm_info[dest_epid].net_stats .tx_packets += 1; adapter->stats64.tx_bytes += len; hw->ep_shm_info[dest_epid].net_stats .tx_bytes += len; } adapter->tx_retry_count = 0; ret = NETDEV_TX_OK; } } } if (ret == NETDEV_TX_OK) { dev_kfree_skb(skb); if (is_multi) { adapter->stats64.tx_packets += 1; hw->ep_shm_info[my_epid].net_stats.tx_packets += 1; adapter->stats64.tx_bytes += 1; hw->ep_shm_info[my_epid].net_stats.tx_bytes += len; } } return ret; } static void fjes_tx_retry(struct net_device *netdev) { struct netdev_queue *queue = netdev_get_tx_queue(netdev, 0); netif_tx_wake_queue(queue); } static void fjes_get_stats64(struct net_device *netdev, struct rtnl_link_stats64 *stats) { struct fjes_adapter *adapter = netdev_priv(netdev); memcpy(stats, &adapter->stats64, sizeof(struct rtnl_link_stats64)); } static int fjes_change_mtu(struct net_device *netdev, int new_mtu) { struct fjes_adapter *adapter = netdev_priv(netdev); bool running = netif_running(netdev); struct fjes_hw *hw = &adapter->hw; unsigned long flags; int ret = -EINVAL; int idx, epidx; for (idx = 0; fjes_support_mtu[idx] != 0; idx++) { if (new_mtu <= fjes_support_mtu[idx]) { new_mtu = fjes_support_mtu[idx]; if (new_mtu == netdev->mtu) return 0; ret = 0; break; } } if (ret) return ret; if (running) { spin_lock_irqsave(&hw->rx_status_lock, flags); for (epidx = 0; epidx < hw->max_epid; epidx++) { if (epidx == hw->my_epid) continue; hw->ep_shm_info[epidx].tx.info->v1i.rx_status &= ~FJES_RX_MTU_CHANGING_DONE; } spin_unlock_irqrestore(&hw->rx_status_lock, flags); netif_tx_stop_all_queues(netdev); netif_carrier_off(netdev); cancel_work_sync(&adapter->tx_stall_task); napi_disable(&adapter->napi); msleep(1000); netif_tx_stop_all_queues(netdev); } netdev->mtu = new_mtu; if (running) { for (epidx = 0; epidx < hw->max_epid; epidx++) { if (epidx == hw->my_epid) continue; spin_lock_irqsave(&hw->rx_status_lock, flags); fjes_hw_setup_epbuf(&hw->ep_shm_info[epidx].tx, netdev->dev_addr, netdev->mtu); hw->ep_shm_info[epidx].tx.info->v1i.rx_status |= FJES_RX_MTU_CHANGING_DONE; spin_unlock_irqrestore(&hw->rx_status_lock, flags); } netif_tx_wake_all_queues(netdev); netif_carrier_on(netdev); napi_enable(&adapter->napi); napi_schedule(&adapter->napi); } return ret; } static int fjes_vlan_rx_add_vid(struct net_device *netdev, __be16 proto, u16 vid) { struct fjes_adapter *adapter = netdev_priv(netdev); bool ret = true; int epid; for (epid = 0; epid < adapter->hw.max_epid; epid++) { if (epid == adapter->hw.my_epid) continue; if (!fjes_hw_check_vlan_id( &adapter->hw.ep_shm_info[epid].tx, vid)) ret = fjes_hw_set_vlan_id( &adapter->hw.ep_shm_info[epid].tx, vid); } return ret ? 0 : -ENOSPC; } static int fjes_vlan_rx_kill_vid(struct net_device *netdev, __be16 proto, u16 vid) { struct fjes_adapter *adapter = netdev_priv(netdev); int epid; for (epid = 0; epid < adapter->hw.max_epid; epid++) { if (epid == adapter->hw.my_epid) continue; fjes_hw_del_vlan_id(&adapter->hw.ep_shm_info[epid].tx, vid); } return 0; } static void fjes_txrx_stop_req_irq(struct fjes_adapter *adapter, int src_epid) { struct fjes_hw *hw = &adapter->hw; enum ep_partner_status status; unsigned long flags; status = fjes_hw_get_partner_ep_status(hw, src_epid); trace_fjes_txrx_stop_req_irq_pre(hw, src_epid, status); switch (status) { case EP_PARTNER_UNSHARE: case EP_PARTNER_COMPLETE: default: break; case EP_PARTNER_WAITING: if (src_epid < hw->my_epid) { spin_lock_irqsave(&hw->rx_status_lock, flags); hw->ep_shm_info[src_epid].tx.info->v1i.rx_status |= FJES_RX_STOP_REQ_DONE; spin_unlock_irqrestore(&hw->rx_status_lock, flags); clear_bit(src_epid, &hw->txrx_stop_req_bit); set_bit(src_epid, &adapter->unshare_watch_bitmask); if (!work_pending(&adapter->unshare_watch_task)) queue_work(adapter->control_wq, &adapter->unshare_watch_task); } break; case EP_PARTNER_SHARED: if (hw->ep_shm_info[src_epid].rx.info->v1i.rx_status & FJES_RX_STOP_REQ_REQUEST) { set_bit(src_epid, &hw->epstop_req_bit); if (!work_pending(&hw->epstop_task)) queue_work(adapter->control_wq, &hw->epstop_task); } break; } trace_fjes_txrx_stop_req_irq_post(hw, src_epid); } static void fjes_stop_req_irq(struct fjes_adapter *adapter, int src_epid) { struct fjes_hw *hw = &adapter->hw; enum ep_partner_status status; unsigned long flags; set_bit(src_epid, &hw->hw_info.buffer_unshare_reserve_bit); status = fjes_hw_get_partner_ep_status(hw, src_epid); trace_fjes_stop_req_irq_pre(hw, src_epid, status); switch (status) { case EP_PARTNER_WAITING: spin_lock_irqsave(&hw->rx_status_lock, flags); hw->ep_shm_info[src_epid].tx.info->v1i.rx_status |= FJES_RX_STOP_REQ_DONE; spin_unlock_irqrestore(&hw->rx_status_lock, flags); clear_bit(src_epid, &hw->txrx_stop_req_bit); /* fall through */ case EP_PARTNER_UNSHARE: case EP_PARTNER_COMPLETE: default: set_bit(src_epid, &adapter->unshare_watch_bitmask); if (!work_pending(&adapter->unshare_watch_task)) queue_work(adapter->control_wq, &adapter->unshare_watch_task); break; case EP_PARTNER_SHARED: set_bit(src_epid, &hw->epstop_req_bit); if (!work_pending(&hw->epstop_task)) queue_work(adapter->control_wq, &hw->epstop_task); break; } trace_fjes_stop_req_irq_post(hw, src_epid); } static void fjes_update_zone_irq(struct fjes_adapter *adapter, int src_epid) { struct fjes_hw *hw = &adapter->hw; if (!work_pending(&hw->update_zone_task)) queue_work(adapter->control_wq, &hw->update_zone_task); } static irqreturn_t fjes_intr(int irq, void *data) { struct fjes_adapter *adapter = data; struct fjes_hw *hw = &adapter->hw; irqreturn_t ret; u32 icr; icr = fjes_hw_capture_interrupt_status(hw); if (icr & REG_IS_MASK_IS_ASSERT) { if (icr & REG_ICTL_MASK_RX_DATA) { fjes_rx_irq(adapter, icr & REG_IS_MASK_EPID); hw->ep_shm_info[icr & REG_IS_MASK_EPID].ep_stats .recv_intr_rx += 1; } if (icr & REG_ICTL_MASK_DEV_STOP_REQ) { fjes_stop_req_irq(adapter, icr & REG_IS_MASK_EPID); hw->ep_shm_info[icr & REG_IS_MASK_EPID].ep_stats .recv_intr_stop += 1; } if (icr & REG_ICTL_MASK_TXRX_STOP_REQ) { fjes_txrx_stop_req_irq(adapter, icr & REG_IS_MASK_EPID); hw->ep_shm_info[icr & REG_IS_MASK_EPID].ep_stats .recv_intr_unshare += 1; } if (icr & REG_ICTL_MASK_TXRX_STOP_DONE) fjes_hw_set_irqmask(hw, REG_ICTL_MASK_TXRX_STOP_DONE, true); if (icr & REG_ICTL_MASK_INFO_UPDATE) { fjes_update_zone_irq(adapter, icr & REG_IS_MASK_EPID); hw->ep_shm_info[icr & REG_IS_MASK_EPID].ep_stats .recv_intr_zoneupdate += 1; } ret = IRQ_HANDLED; } else { ret = IRQ_NONE; } return ret; } static int fjes_rxframe_search_exist(struct fjes_adapter *adapter, int start_epid) { struct fjes_hw *hw = &adapter->hw; enum ep_partner_status pstatus; int max_epid, cur_epid; int i; max_epid = hw->max_epid; start_epid = (start_epid + 1 + max_epid) % max_epid; for (i = 0; i < max_epid; i++) { cur_epid = (start_epid + i) % max_epid; if (cur_epid == hw->my_epid) continue; pstatus = fjes_hw_get_partner_ep_status(hw, cur_epid); if (pstatus == EP_PARTNER_SHARED) { if (!fjes_hw_epbuf_rx_is_empty( &hw->ep_shm_info[cur_epid].rx)) return cur_epid; } } return -1; } static void *fjes_rxframe_get(struct fjes_adapter *adapter, size_t *psize, int *cur_epid) { void *frame; *cur_epid = fjes_rxframe_search_exist(adapter, *cur_epid); if (*cur_epid < 0) return NULL; frame = fjes_hw_epbuf_rx_curpkt_get_addr( &adapter->hw.ep_shm_info[*cur_epid].rx, psize); return frame; } static void fjes_rxframe_release(struct fjes_adapter *adapter, int cur_epid) { fjes_hw_epbuf_rx_curpkt_drop(&adapter->hw.ep_shm_info[cur_epid].rx); } static void fjes_rx_irq(struct fjes_adapter *adapter, int src_epid) { struct fjes_hw *hw = &adapter->hw; fjes_hw_set_irqmask(hw, REG_ICTL_MASK_RX_DATA, true); adapter->unset_rx_last = true; napi_schedule(&adapter->napi); } static int fjes_poll(struct napi_struct *napi, int budget) { struct fjes_adapter *adapter = container_of(napi, struct fjes_adapter, napi); struct net_device *netdev = napi->dev; struct fjes_hw *hw = &adapter->hw; struct sk_buff *skb; int work_done = 0; int cur_epid = 0; int epidx; size_t frame_len; void *frame; spin_lock(&hw->rx_status_lock); for (epidx = 0; epidx < hw->max_epid; epidx++) { if (epidx == hw->my_epid) continue; if (fjes_hw_get_partner_ep_status(hw, epidx) == EP_PARTNER_SHARED) adapter->hw.ep_shm_info[epidx] .tx.info->v1i.rx_status |= FJES_RX_POLL_WORK; } spin_unlock(&hw->rx_status_lock); while (work_done < budget) { prefetch(&adapter->hw); frame = fjes_rxframe_get(adapter, &frame_len, &cur_epid); if (frame) { skb = napi_alloc_skb(napi, frame_len); if (!skb) { adapter->stats64.rx_dropped += 1; hw->ep_shm_info[cur_epid].net_stats .rx_dropped += 1; adapter->stats64.rx_errors += 1; hw->ep_shm_info[cur_epid].net_stats .rx_errors += 1; } else { skb_put_data(skb, frame, frame_len); skb->protocol = eth_type_trans(skb, netdev); skb->ip_summed = CHECKSUM_UNNECESSARY; netif_receive_skb(skb); work_done++; adapter->stats64.rx_packets += 1; hw->ep_shm_info[cur_epid].net_stats .rx_packets += 1; adapter->stats64.rx_bytes += frame_len; hw->ep_shm_info[cur_epid].net_stats .rx_bytes += frame_len; if (is_multicast_ether_addr( ((struct ethhdr *)frame)->h_dest)) { adapter->stats64.multicast += 1; hw->ep_shm_info[cur_epid].net_stats .multicast += 1; } } fjes_rxframe_release(adapter, cur_epid); adapter->unset_rx_last = true; } else { break; } } if (work_done < budget) { napi_complete_done(napi, work_done); if (adapter->unset_rx_last) { adapter->rx_last_jiffies = jiffies; adapter->unset_rx_last = false; } if (((long)jiffies - (long)adapter->rx_last_jiffies) < 3) { napi_reschedule(napi); } else { spin_lock(&hw->rx_status_lock); for (epidx = 0; epidx < hw->max_epid; epidx++) { if (epidx == hw->my_epid) continue; if (fjes_hw_get_partner_ep_status(hw, epidx) == EP_PARTNER_SHARED) adapter->hw.ep_shm_info[epidx].tx .info->v1i.rx_status &= ~FJES_RX_POLL_WORK; } spin_unlock(&hw->rx_status_lock); fjes_hw_set_irqmask(hw, REG_ICTL_MASK_RX_DATA, false); } } return work_done; } /* fjes_probe - Device Initialization Routine */ static int fjes_probe(struct platform_device *plat_dev) { struct fjes_adapter *adapter; struct net_device *netdev; struct resource *res; struct fjes_hw *hw; int err; err = -ENOMEM; netdev = alloc_netdev_mq(sizeof(struct fjes_adapter), "es%d", NET_NAME_UNKNOWN, fjes_netdev_setup, FJES_MAX_QUEUES); if (!netdev) goto err_out; SET_NETDEV_DEV(netdev, &plat_dev->dev); dev_set_drvdata(&plat_dev->dev, netdev); adapter = netdev_priv(netdev); adapter->netdev = netdev; adapter->plat_dev = plat_dev; hw = &adapter->hw; hw->back = adapter; /* setup the private structure */ err = fjes_sw_init(adapter); if (err) goto err_free_netdev; INIT_WORK(&adapter->force_close_task, fjes_force_close_task); adapter->force_reset = false; adapter->open_guard = false; adapter->txrx_wq = alloc_workqueue(DRV_NAME "/txrx", WQ_MEM_RECLAIM, 0); if (unlikely(!adapter->txrx_wq)) { err = -ENOMEM; goto err_free_netdev; } adapter->control_wq = alloc_workqueue(DRV_NAME "/control", WQ_MEM_RECLAIM, 0); if (unlikely(!adapter->control_wq)) { err = -ENOMEM; goto err_free_txrx_wq; } INIT_WORK(&adapter->tx_stall_task, fjes_tx_stall_task); INIT_WORK(&adapter->raise_intr_rxdata_task, fjes_raise_intr_rxdata_task); INIT_WORK(&adapter->unshare_watch_task, fjes_watch_unshare_task); adapter->unshare_watch_bitmask = 0; INIT_DELAYED_WORK(&adapter->interrupt_watch_task, fjes_irq_watch_task); adapter->interrupt_watch_enable = false; res = platform_get_resource(plat_dev, IORESOURCE_MEM, 0); if (!res) { err = -EINVAL; goto err_free_control_wq; } hw->hw_res.start = res->start; hw->hw_res.size = resource_size(res); hw->hw_res.irq = platform_get_irq(plat_dev, 0); if (hw->hw_res.irq < 0) { err = hw->hw_res.irq; goto err_free_control_wq; } err = fjes_hw_init(&adapter->hw); if (err) goto err_free_control_wq; /* setup MAC address (02:00:00:00:00:[epid])*/ netdev->dev_addr[0] = 2; netdev->dev_addr[1] = 0; netdev->dev_addr[2] = 0; netdev->dev_addr[3] = 0; netdev->dev_addr[4] = 0; netdev->dev_addr[5] = hw->my_epid; /* EPID */ err = register_netdev(netdev); if (err) goto err_hw_exit; netif_carrier_off(netdev); fjes_dbg_adapter_init(adapter); return 0; err_hw_exit: fjes_hw_exit(&adapter->hw); err_free_control_wq: destroy_workqueue(adapter->control_wq); err_free_txrx_wq: destroy_workqueue(adapter->txrx_wq); err_free_netdev: free_netdev(netdev); err_out: return err; } /* fjes_remove - Device Removal Routine */ static int fjes_remove(struct platform_device *plat_dev) { struct net_device *netdev = dev_get_drvdata(&plat_dev->dev); struct fjes_adapter *adapter = netdev_priv(netdev); struct fjes_hw *hw = &adapter->hw; fjes_dbg_adapter_exit(adapter); cancel_delayed_work_sync(&adapter->interrupt_watch_task); cancel_work_sync(&adapter->unshare_watch_task); cancel_work_sync(&adapter->raise_intr_rxdata_task); cancel_work_sync(&adapter->tx_stall_task); if (adapter->control_wq) destroy_workqueue(adapter->control_wq); if (adapter->txrx_wq) destroy_workqueue(adapter->txrx_wq); unregister_netdev(netdev); fjes_hw_exit(hw); netif_napi_del(&adapter->napi); free_netdev(netdev); return 0; } static int fjes_sw_init(struct fjes_adapter *adapter) { struct net_device *netdev = adapter->netdev; netif_napi_add(netdev, &adapter->napi, fjes_poll, 64); return 0; } /* fjes_netdev_setup - netdevice initialization routine */ static void fjes_netdev_setup(struct net_device *netdev) { ether_setup(netdev); netdev->watchdog_timeo = FJES_TX_RETRY_INTERVAL; netdev->netdev_ops = &fjes_netdev_ops; fjes_set_ethtool_ops(netdev); netdev->mtu = fjes_support_mtu[3]; netdev->min_mtu = fjes_support_mtu[0]; netdev->max_mtu = fjes_support_mtu[3]; netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER; } static void fjes_irq_watch_task(struct work_struct *work) { struct fjes_adapter *adapter = container_of(to_delayed_work(work), struct fjes_adapter, interrupt_watch_task); local_irq_disable(); fjes_intr(adapter->hw.hw_res.irq, adapter); local_irq_enable(); if (fjes_rxframe_search_exist(adapter, 0) >= 0) napi_schedule(&adapter->napi); if (adapter->interrupt_watch_enable) { if (!delayed_work_pending(&adapter->interrupt_watch_task)) queue_delayed_work(adapter->control_wq, &adapter->interrupt_watch_task, FJES_IRQ_WATCH_DELAY); } } static void fjes_watch_unshare_task(struct work_struct *work) { struct fjes_adapter *adapter = container_of(work, struct fjes_adapter, unshare_watch_task); struct net_device *netdev = adapter->netdev; struct fjes_hw *hw = &adapter->hw; int unshare_watch, unshare_reserve; int max_epid, my_epid, epidx; int stop_req, stop_req_done; ulong unshare_watch_bitmask; unsigned long flags; int wait_time = 0; int is_shared; int ret; my_epid = hw->my_epid; max_epid = hw->max_epid; unshare_watch_bitmask = adapter->unshare_watch_bitmask; adapter->unshare_watch_bitmask = 0; while ((unshare_watch_bitmask || hw->txrx_stop_req_bit) && (wait_time < 3000)) { for (epidx = 0; epidx < max_epid; epidx++) { if (epidx == my_epid) continue; is_shared = fjes_hw_epid_is_shared(hw->hw_info.share, epidx); stop_req = test_bit(epidx, &hw->txrx_stop_req_bit); stop_req_done = hw->ep_shm_info[epidx].rx.info->v1i.rx_status & FJES_RX_STOP_REQ_DONE; unshare_watch = test_bit(epidx, &unshare_watch_bitmask); unshare_reserve = test_bit(epidx, &hw->hw_info.buffer_unshare_reserve_bit); if ((!stop_req || (is_shared && (!is_shared || !stop_req_done))) && (is_shared || !unshare_watch || !unshare_reserve)) continue; mutex_lock(&hw->hw_info.lock); ret = fjes_hw_unregister_buff_addr(hw, epidx); switch (ret) { case 0: break; case -ENOMSG: case -EBUSY: default: if (!work_pending( &adapter->force_close_task)) { adapter->force_reset = true; schedule_work( &adapter->force_close_task); } break; } mutex_unlock(&hw->hw_info.lock); hw->ep_shm_info[epidx].ep_stats .com_unregist_buf_exec += 1; spin_lock_irqsave(&hw->rx_status_lock, flags); fjes_hw_setup_epbuf(&hw->ep_shm_info[epidx].tx, netdev->dev_addr, netdev->mtu); spin_unlock_irqrestore(&hw->rx_status_lock, flags); clear_bit(epidx, &hw->txrx_stop_req_bit); clear_bit(epidx, &unshare_watch_bitmask); clear_bit(epidx, &hw->hw_info.buffer_unshare_reserve_bit); } msleep(100); wait_time += 100; } if (hw->hw_info.buffer_unshare_reserve_bit) { for (epidx = 0; epidx < max_epid; epidx++) { if (epidx == my_epid) continue; if (test_bit(epidx, &hw->hw_info.buffer_unshare_reserve_bit)) { mutex_lock(&hw->hw_info.lock); ret = fjes_hw_unregister_buff_addr(hw, epidx); switch (ret) { case 0: break; case -ENOMSG: case -EBUSY: default: if (!work_pending( &adapter->force_close_task)) { adapter->force_reset = true; schedule_work( &adapter->force_close_task); } break; } mutex_unlock(&hw->hw_info.lock); hw->ep_shm_info[epidx].ep_stats .com_unregist_buf_exec += 1; spin_lock_irqsave(&hw->rx_status_lock, flags); fjes_hw_setup_epbuf( &hw->ep_shm_info[epidx].tx, netdev->dev_addr, netdev->mtu); spin_unlock_irqrestore(&hw->rx_status_lock, flags); clear_bit(epidx, &hw->txrx_stop_req_bit); clear_bit(epidx, &unshare_watch_bitmask); clear_bit(epidx, &hw->hw_info.buffer_unshare_reserve_bit); } if (test_bit(epidx, &unshare_watch_bitmask)) { spin_lock_irqsave(&hw->rx_status_lock, flags); hw->ep_shm_info[epidx].tx.info->v1i.rx_status &= ~FJES_RX_STOP_REQ_DONE; spin_unlock_irqrestore(&hw->rx_status_lock, flags); } } } } static acpi_status acpi_find_extended_socket_device(acpi_handle obj_handle, u32 level, void *context, void **return_value) { struct acpi_device *device; bool *found = context; int result; result = acpi_bus_get_device(obj_handle, &device); if (result) return AE_OK; if (strcmp(acpi_device_hid(device), ACPI_MOTHERBOARD_RESOURCE_HID)) return AE_OK; if (!is_extended_socket_device(device)) return AE_OK; if (acpi_check_extended_socket_status(device)) return AE_OK; *found = true; return AE_CTRL_TERMINATE; } /* fjes_init_module - Driver Registration Routine */ static int __init fjes_init_module(void) { bool found = false; int result; acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, ACPI_UINT32_MAX, acpi_find_extended_socket_device, NULL, &found, NULL); if (!found) return -ENODEV; pr_info("%s - version %s - %s\n", fjes_driver_string, fjes_driver_version, fjes_copyright); fjes_dbg_init(); result = platform_driver_register(&fjes_driver); if (result < 0) { fjes_dbg_exit(); return result; } result = acpi_bus_register_driver(&fjes_acpi_driver); if (result < 0) goto fail_acpi_driver; return 0; fail_acpi_driver: platform_driver_unregister(&fjes_driver); fjes_dbg_exit(); return result; } module_init(fjes_init_module); /* fjes_exit_module - Driver Exit Cleanup Routine */ static void __exit fjes_exit_module(void) { acpi_bus_unregister_driver(&fjes_acpi_driver); platform_driver_unregister(&fjes_driver); fjes_dbg_exit(); } module_exit(fjes_exit_module);