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Commit bd5a2569 authored by Taku Izumi's avatar Taku Izumi Committed by David S. Miller
Browse files

fjes: Introduce spinlock for rx_status 



This patch introduces spinlock of rx_status for
proper excusive control.

Signed-off-by: default avatarTaku Izumi <izumi.taku@jp.fujitsu.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 16bbec3a

drivers/net/fjes/fjes_hw.c

+21 −1
Original line number Diff line number Diff line
@@ -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,

drivers/net/fjes/fjes_hw.h

+2 −0
Original line number Diff line number Diff line
@@ -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 *);

drivers/net/fjes/fjes_main.c

+49 −8
Original line number Diff line number Diff line
@@ -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 &=

		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);

			}

		}

	}