fjes: update_zone_task

This patch adds update_zone_task.
Zoning information can be changed by user.
This task is used to monitor if zoning information is
changed or not.

Signed-off-by: Taku Izumi <izumi.taku@jp.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 194 insertions, 0 deletions

diff --git a/drivers/net/fjes/fjes_hw.c b/drivers/net/fjes/fjes_hw.c
index 4a4b750fdb9c..4525d3664ccf 100644
--- a/drivers/net/fjes/fjes_hw.c
+++ b/drivers/net/fjes/fjes_hw.c
@@ -22,6 +22,8 @@
 #include "fjes_hw.h"
 #include "fjes.h"
 
+static void fjes_hw_update_zone_task(struct work_struct *);
+
 /* supported MTU list */
 const u32 fjes_support_mtu[] = {
         FJES_MTU_DEFINE(8 * 1024),
@@ -322,6 +324,8 @@ int fjes_hw_init(struct fjes_hw *hw)
 
         fjes_hw_set_irqmask(hw, REG_ICTL_MASK_ALL, true);
 
+        INIT_WORK(&hw->update_zone_task, fjes_hw_update_zone_task);
+
         mutex_init(&hw->hw_info.lock);
 
         hw->max_epid = fjes_hw_get_max_epid(hw);
@@ -349,6 +353,8 @@ void fjes_hw_exit(struct fjes_hw *hw)
         }
 
         fjes_hw_cleanup(hw);
+
+        cancel_work_sync(&hw->update_zone_task);
 }
 
 static enum fjes_dev_command_response_e
@@ -913,3 +919,176 @@ int fjes_hw_epbuf_tx_pkt_send(struct epbuf_handler *epbh,
 
         return 0;
 }
+
+static void fjes_hw_update_zone_task(struct work_struct *work)
+{
+        struct fjes_hw *hw = container_of(work,
+                        struct fjes_hw, update_zone_task);
+
+        struct my_s {u8 es_status; u8 zone; } *info;
+        union fjes_device_command_res *res_buf;
+        enum ep_partner_status pstatus;
+
+        struct fjes_adapter *adapter;
+        struct net_device *netdev;
+
+        ulong unshare_bit = 0;
+        ulong share_bit = 0;
+        ulong irq_bit = 0;
+
+        int epidx;
+        int ret;
+
+        adapter = (struct fjes_adapter *)hw->back;
+        netdev = adapter->netdev;
+        res_buf = hw->hw_info.res_buf;
+        info = (struct my_s *)&res_buf->info.info;
+
+        mutex_lock(&hw->hw_info.lock);
+
+        ret = fjes_hw_request_info(hw);
+        switch (ret) {
+        case -ENOMSG:
+        case -EBUSY:
+        default:
+                if (!work_pending(&adapter->force_close_task)) {
+                        adapter->force_reset = true;
+                        schedule_work(&adapter->force_close_task);
+                }
+                break;
+
+        case 0:
+
+                for (epidx = 0; epidx < hw->max_epid; epidx++) {
+                        if (epidx == hw->my_epid) {
+                                hw->ep_shm_info[epidx].es_status =
+                                        info[epidx].es_status;
+                                hw->ep_shm_info[epidx].zone =
+                                        info[epidx].zone;
+                                continue;
+                        }
+
+                        pstatus = fjes_hw_get_partner_ep_status(hw, epidx);
+                        switch (pstatus) {
+                        case EP_PARTNER_UNSHARE:
+                        default:
+                                if ((info[epidx].zone !=
+                                        FJES_ZONING_ZONE_TYPE_NONE) &&
+                                    (info[epidx].es_status ==
+                                        FJES_ZONING_STATUS_ENABLE) &&
+                                    (info[epidx].zone ==
+                                        info[hw->my_epid].zone))
+                                        set_bit(epidx, &share_bit);
+                                else
+                                        set_bit(epidx, &unshare_bit);
+                                break;
+
+                        case EP_PARTNER_COMPLETE:
+                        case EP_PARTNER_WAITING:
+                                if ((info[epidx].zone ==
+                                        FJES_ZONING_ZONE_TYPE_NONE) ||
+                                    (info[epidx].es_status !=
+                                        FJES_ZONING_STATUS_ENABLE) ||
+                                    (info[epidx].zone !=
+                                        info[hw->my_epid].zone)) {
+                                        set_bit(epidx,
+                                                &adapter->unshare_watch_bitmask);
+                                        set_bit(epidx,
+                                                &hw->hw_info.buffer_unshare_reserve_bit);
+                                }
+                                break;
+
+                        case EP_PARTNER_SHARED:
+                                if ((info[epidx].zone ==
+                                        FJES_ZONING_ZONE_TYPE_NONE) ||
+                                    (info[epidx].es_status !=
+                                        FJES_ZONING_STATUS_ENABLE) ||
+                                    (info[epidx].zone !=
+                                        info[hw->my_epid].zone))
+                                        set_bit(epidx, &irq_bit);
+                                break;
+                        }
+                }
+
+                hw->ep_shm_info[epidx].es_status = info[epidx].es_status;
+                hw->ep_shm_info[epidx].zone = info[epidx].zone;
+
+                break;
+        }
+
+        mutex_unlock(&hw->hw_info.lock);
+
+        for (epidx = 0; epidx < hw->max_epid; epidx++) {
+                if (epidx == hw->my_epid)
+                        continue;
+
+                if (test_bit(epidx, &share_bit)) {
+                        fjes_hw_setup_epbuf(&hw->ep_shm_info[epidx].tx,
+                                            netdev->dev_addr, netdev->mtu);
+
+                        mutex_lock(&hw->hw_info.lock);
+
+                        ret = fjes_hw_register_buff_addr(
+                                hw, epidx, &hw->ep_shm_info[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);
+                }
+
+                if (test_bit(epidx, &unshare_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);
+
+                        if (ret == 0)
+                                fjes_hw_setup_epbuf(
+                                        &hw->ep_shm_info[epidx].tx,
+                                        netdev->dev_addr, netdev->mtu);
+                }
+
+                if (test_bit(epidx, &irq_bit)) {
+                        fjes_hw_raise_interrupt(hw, epidx,
+                                                REG_ICTL_MASK_TXRX_STOP_REQ);
+
+                        set_bit(epidx, &hw->txrx_stop_req_bit);
+                        hw->ep_shm_info[epidx].tx.
+                                info->v1i.rx_status |=
+                                        FJES_RX_STOP_REQ_REQUEST;
+                        set_bit(epidx, &hw->hw_info.buffer_unshare_reserve_bit);
+                }
+        }
+
+        if (irq_bit || adapter->unshare_watch_bitmask) {
+                if (!work_pending(&adapter->unshare_watch_task))
+                        queue_work(adapter->control_wq,
+                                   &adapter->unshare_watch_task);
+        }
+}
diff --git a/drivers/net/fjes/fjes_hw.h b/drivers/net/fjes/fjes_hw.h
index 95e632b363c1..e59b737b45e7 100644
--- a/drivers/net/fjes/fjes_hw.h
+++ b/drivers/net/fjes/fjes_hw.h
@@ -282,6 +282,7 @@ struct fjes_hw {
 
         unsigned long txrx_stop_req_bit;
         unsigned long epstop_req_bit;
+        struct work_struct update_zone_task;
 
         int my_epid;
         int max_epid;
diff --git a/drivers/net/fjes/fjes_main.c b/drivers/net/fjes/fjes_main.c
index c47ecf35d005..8e3a084277c0 100644
--- a/drivers/net/fjes/fjes_main.c
+++ b/drivers/net/fjes/fjes_main.c
@@ -315,6 +315,8 @@ static int fjes_close(struct net_device *netdev)
         cancel_work_sync(&adapter->raise_intr_rxdata_task);
         cancel_work_sync(&adapter->tx_stall_task);
 
+        cancel_work_sync(&hw->update_zone_task);
+
         fjes_hw_wait_epstop(hw);
 
         fjes_free_resources(adapter);
@@ -817,6 +819,15 @@ static int fjes_vlan_rx_kill_vid(struct net_device *netdev,
         return 0;
 }
 
+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;
@@ -830,6 +841,9 @@ static irqreturn_t fjes_intr(int irq, void *data)
                 if (icr & REG_ICTL_MASK_RX_DATA)
                         fjes_rx_irq(adapter, icr & REG_IS_MASK_EPID);
 
+                if (icr & REG_ICTL_MASK_INFO_UPDATE)
+                        fjes_update_zone_irq(adapter, icr & REG_IS_MASK_EPID);
+
                 ret = IRQ_HANDLED;
         } else {
                 ret = IRQ_NONE;