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Diffstat (limited to '')
| -rw-r--r-- | drivers/net/fjes/fjes_main.c | 1549 |
1 files changed, 1549 insertions, 0 deletions
diff --git a/drivers/net/fjes/fjes_main.c b/drivers/net/fjes/fjes_main.c new file mode 100644 index 000000000..1eff202f6 --- /dev/null +++ b/drivers/net/fjes/fjes_main.c @@ -0,0 +1,1549 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * FUJITSU Extended Socket Network Device driver + * Copyright (c) 2015 FUJITSU LIMITED + */ + +#include <linux/module.h> +#include <linux/types.h> +#include <linux/nls.h> +#include <linux/platform_device.h> +#include <linux/netdevice.h> +#include <linux/interrupt.h> + +#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 <izumi.taku@jp.fujitsu.com>"); +MODULE_DESCRIPTION("FUJITSU Extended Socket Network Device Driver"); +MODULE_LICENSE("GPL"); +MODULE_VERSION(DRV_VERSION); + +#define ACPI_MOTHERBOARD_RESOURCE_HID "PNP0C02" + +static const struct acpi_device_id fjes_acpi_ids[] = { + {ACPI_MOTHERBOARD_RESOURCE_HID, 0}, + {"", 0}, +}; +MODULE_DEVICE_TABLE(acpi, fjes_acpi_ids); + +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 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 struct resource fjes_resource[] = { + DEFINE_RES_MEM(0, 1), + DEFINE_RES_IRQ(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 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 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_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 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); + fallthrough; + 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_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_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_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 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); + } +} + +/* 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_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_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 void fjes_tx_retry(struct net_device *netdev, unsigned int txqueue) +{ + struct netdev_queue *queue = netdev_get_tx_queue(netdev, 0); + + netif_tx_wake_queue(queue); +} + +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 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_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 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 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; +} + +static int fjes_sw_init(struct fjes_adapter *adapter) +{ + struct net_device *netdev = adapter->netdev; + + netif_napi_add(netdev, &adapter->napi, fjes_poll); + + return 0; +} + +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_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_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 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 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); + } +} + +/* 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; + u8 addr[ETH_ALEN]; + 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])*/ + addr[0] = 2; + addr[1] = 0; + addr[2] = 0; + addr[3] = 0; + addr[4] = 0; + addr[5] = hw->my_epid; /* EPID */ + eth_hw_addr_set(netdev, addr); + + 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 struct platform_driver fjes_driver = { + .driver = { + .name = DRV_NAME, + }, + .probe = fjes_probe, + .remove = fjes_remove, +}; + +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; + + device = acpi_fetch_acpi_dev(obj_handle); + if (!device) + 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); |