From bd5a256991f9a9cc0b7f6385dd1d8cfc90559b12 Mon Sep 17 00:00:00 2001 From: Taku Izumi Date: Fri, 15 Apr 2016 11:25:46 +0900 Subject: [PATCH] fjes: Introduce spinlock for rx_status This patch introduces spinlock of rx_status for proper excusive control. Signed-off-by: Taku Izumi Signed-off-by: David S. Miller --- drivers/net/fjes/fjes_hw.c | 22 +++++++++++++- drivers/net/fjes/fjes_hw.h | 2 ++ drivers/net/fjes/fjes_main.c | 57 +++++++++++++++++++++++++++++++----- 3 files changed, 72 insertions(+), 9 deletions(-) diff --git a/drivers/net/fjes/fjes_hw.c b/drivers/net/fjes/fjes_hw.c index e9f494bd70ad..0dbafedc0a34 100644 --- a/drivers/net/fjes/fjes_hw.c +++ b/drivers/net/fjes/fjes_hw.c @@ -216,6 +216,7 @@ static int fjes_hw_setup(struct fjes_hw *hw) u8 mac[ETH_ALEN] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; struct fjes_device_command_param param; struct ep_share_mem_info *buf_pair; + unsigned long flags; size_t mem_size; int result; int epidx; @@ -264,10 +265,12 @@ static int fjes_hw_setup(struct fjes_hw *hw) if (result) return result; + spin_lock_irqsave(&hw->rx_status_lock, flags); fjes_hw_setup_epbuf(&buf_pair->tx, mac, fjes_support_mtu[0]); fjes_hw_setup_epbuf(&buf_pair->rx, mac, fjes_support_mtu[0]); + spin_unlock_irqrestore(&hw->rx_status_lock, flags); } } @@ -329,6 +332,7 @@ int fjes_hw_init(struct fjes_hw *hw) INIT_WORK(&hw->epstop_task, fjes_hw_epstop_task); mutex_init(&hw->hw_info.lock); + spin_lock_init(&hw->rx_status_lock); hw->max_epid = fjes_hw_get_max_epid(hw); hw->my_epid = fjes_hw_get_my_epid(hw); @@ -736,6 +740,7 @@ fjes_hw_get_partner_ep_status(struct fjes_hw *hw, int epid) void fjes_hw_raise_epstop(struct fjes_hw *hw) { enum ep_partner_status status; + unsigned long flags; int epidx; for (epidx = 0; epidx < hw->max_epid; epidx++) { @@ -755,8 +760,10 @@ void fjes_hw_raise_epstop(struct fjes_hw *hw) set_bit(epidx, &hw->hw_info.buffer_unshare_reserve_bit); set_bit(epidx, &hw->txrx_stop_req_bit); + spin_lock_irqsave(&hw->rx_status_lock, flags); hw->ep_shm_info[epidx].tx.info->v1i.rx_status |= FJES_RX_STOP_REQ_REQUEST; + spin_unlock_irqrestore(&hw->rx_status_lock, flags); } } @@ -938,6 +945,7 @@ static void fjes_hw_update_zone_task(struct work_struct *work) struct fjes_adapter *adapter; struct net_device *netdev; + unsigned long flags; ulong unshare_bit = 0; ulong share_bit = 0; @@ -1030,8 +1038,10 @@ static void fjes_hw_update_zone_task(struct work_struct *work) continue; if (test_bit(epidx, &share_bit)) { + 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); mutex_lock(&hw->hw_info.lock); @@ -1075,10 +1085,14 @@ static void fjes_hw_update_zone_task(struct work_struct *work) mutex_unlock(&hw->hw_info.lock); - if (ret == 0) + if (ret == 0) { + 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); + } } if (test_bit(epidx, &irq_bit)) { @@ -1086,9 +1100,11 @@ static void fjes_hw_update_zone_task(struct work_struct *work) REG_ICTL_MASK_TXRX_STOP_REQ); set_bit(epidx, &hw->txrx_stop_req_bit); + spin_lock_irqsave(&hw->rx_status_lock, flags); hw->ep_shm_info[epidx].tx. info->v1i.rx_status |= FJES_RX_STOP_REQ_REQUEST; + spin_unlock_irqrestore(&hw->rx_status_lock, flags); set_bit(epidx, &hw->hw_info.buffer_unshare_reserve_bit); } } @@ -1104,6 +1120,7 @@ static void fjes_hw_epstop_task(struct work_struct *work) { struct fjes_hw *hw = container_of(work, struct fjes_hw, epstop_task); struct fjes_adapter *adapter = (struct fjes_adapter *)hw->back; + unsigned long flags; ulong remain_bit; int epid_bit; @@ -1111,9 +1128,12 @@ static void fjes_hw_epstop_task(struct work_struct *work) while ((remain_bit = hw->epstop_req_bit)) { for (epid_bit = 0; remain_bit; remain_bit >>= 1, epid_bit++) { if (remain_bit & 1) { + spin_lock_irqsave(&hw->rx_status_lock, flags); hw->ep_shm_info[epid_bit]. tx.info->v1i.rx_status |= FJES_RX_STOP_REQ_DONE; + spin_unlock_irqrestore(&hw->rx_status_lock, + flags); clear_bit(epid_bit, &hw->epstop_req_bit); set_bit(epid_bit, diff --git a/drivers/net/fjes/fjes_hw.h b/drivers/net/fjes/fjes_hw.h index f40cf0792a39..1445ac99d6e3 100644 --- a/drivers/net/fjes/fjes_hw.h +++ b/drivers/net/fjes/fjes_hw.h @@ -300,6 +300,8 @@ struct fjes_hw { u8 *base; struct fjes_hw_info hw_info; + + spinlock_t rx_status_lock; /* spinlock for rx_status */ }; int fjes_hw_init(struct fjes_hw *); diff --git a/drivers/net/fjes/fjes_main.c b/drivers/net/fjes/fjes_main.c index 3c0c1202f237..87b24748bfcd 100644 --- a/drivers/net/fjes/fjes_main.c +++ b/drivers/net/fjes/fjes_main.c @@ -290,6 +290,7 @@ 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); @@ -299,13 +300,18 @@ static int fjes_close(struct net_device *netdev) 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; - adapter->hw.ep_shm_info[epidx].tx.info->v1i.rx_status &= - ~FJES_RX_POLL_WORK; + 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); @@ -330,6 +336,7 @@ 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; @@ -371,8 +378,10 @@ static int fjes_setup_resources(struct fjes_adapter *adapter) 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); @@ -402,6 +411,7 @@ static void fjes_free_resources(struct fjes_adapter *adapter) struct ep_share_mem_info *buf_pair; struct fjes_hw *hw = &adapter->hw; bool reset_flag = false; + unsigned long flags; int result; int epidx; @@ -418,8 +428,10 @@ static void fjes_free_resources(struct fjes_adapter *adapter) 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); } @@ -766,6 +778,7 @@ 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; @@ -784,12 +797,15 @@ static int fjes_change_mtu(struct net_device *netdev, int new_mtu) 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); @@ -803,23 +819,25 @@ static int fjes_change_mtu(struct net_device *netdev, int new_mtu) netdev->mtu = new_mtu; if (running) { + spin_lock_irqsave(&hw->rx_status_lock, flags); for (epidx = 0; epidx < hw->max_epid; epidx++) { if (epidx == hw->my_epid) continue; - local_irq_disable(); + spin_lock_irqsave(&hw->rx_status_lock, flags); fjes_hw_setup_epbuf(&hw->ep_shm_info[epidx].tx, netdev->dev_addr, netdev->mtu); - local_irq_enable(); 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; @@ -866,6 +884,7 @@ static void fjes_txrx_stop_req_irq(struct fjes_adapter *adapter, { struct fjes_hw *hw = &adapter->hw; enum ep_partner_status status; + unsigned long flags; status = fjes_hw_get_partner_ep_status(hw, src_epid); switch (status) { @@ -875,8 +894,10 @@ static void fjes_txrx_stop_req_irq(struct fjes_adapter *adapter, 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); @@ -902,14 +923,17 @@ 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); 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: @@ -1042,13 +1066,17 @@ static int fjes_poll(struct napi_struct *napi, int budget) 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; - adapter->hw.ep_shm_info[epidx].tx.info->v1i.rx_status |= - FJES_RX_POLL_WORK; + 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); @@ -1106,13 +1134,17 @@ static int fjes_poll(struct napi_struct *napi, int budget) 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; - adapter->hw.ep_shm_info[epidx] - .tx.info->v1i.rx_status &= + 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); } @@ -1281,6 +1313,7 @@ static void fjes_watch_unshare_task(struct work_struct *work) 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; @@ -1333,8 +1366,10 @@ static void fjes_watch_unshare_task(struct work_struct *work) } mutex_unlock(&hw->hw_info.lock); + 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); @@ -1372,9 +1407,12 @@ static void fjes_watch_unshare_task(struct work_struct *work) } mutex_unlock(&hw->hw_info.lock); + 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); @@ -1382,8 +1420,11 @@ static void fjes_watch_unshare_task(struct work_struct *work) } 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); } } } -- 2.20.1