netxen: separate register and memory access lock

Since register and onboard memory access has separate
window registers, they need not be kept under same lock.

Also, memory is always accessed from process context
(mostly for firmware init and diagnostic tools).

Signed-off-by: Dhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 30 insertions, 33 deletions

diff --git a/drivers/net/netxen/netxen_nic_hw.c b/drivers/net/netxen/netxen_nic_hw.c
index 37f47660dcdd..d067bee87cd5 100644
--- a/drivers/net/netxen/netxen_nic_hw.c
+++ b/drivers/net/netxen/netxen_nic_hw.c
@@ -41,6 +41,11 @@
 #define CRB_HI(off)	((crb_hub_agt[CRB_BLK(off)] << 20) | ((off) & 0xf0000))
 #define CRB_INDIRECT_2M	(0x1e0000UL)
 
+static void netxen_nic_io_write_128M(struct netxen_adapter *adapter,
+		void __iomem *addr, u32 data);
+static u32 netxen_nic_io_read_128M(struct netxen_adapter *adapter,
+		void __iomem *addr);
+
 #ifndef readq
 static inline u64 readq(void __iomem *addr)
 {
@@ -1164,17 +1169,15 @@ netxen_nic_hw_write_wx_128M(struct netxen_adapter *adapter, ulong off, u32 data)
 	BUG_ON(!addr);
 
 	if (ADDR_IN_WINDOW1(off)) {	/* Window 1 */
-		read_lock(&adapter->adapter_lock);
-		writel(data, addr);
-		read_unlock(&adapter->adapter_lock);
+		netxen_nic_io_write_128M(adapter, addr, data);
 	} else {		/* Window 0 */
-		write_lock_irqsave(&adapter->adapter_lock, flags);
+		write_lock_irqsave(&adapter->ahw.crb_lock, flags);
 		addr = pci_base_offset(adapter, off);
 		netxen_nic_pci_set_crbwindow_128M(adapter, 0);
 		writel(data, addr);
 		netxen_nic_pci_set_crbwindow_128M(adapter,
 				NETXEN_WINDOW_ONE);
-		write_unlock_irqrestore(&adapter->adapter_lock, flags);
+		write_unlock_irqrestore(&adapter->ahw.crb_lock, flags);
 	}
 
 	return 0;
@@ -1195,16 +1198,14 @@ netxen_nic_hw_read_wx_128M(struct netxen_adapter *adapter, ulong off)
 	BUG_ON(!addr);
 
 	if (ADDR_IN_WINDOW1(off)) {	/* Window 1 */
-		read_lock(&adapter->adapter_lock);
-		data = readl(addr);
-		read_unlock(&adapter->adapter_lock);
+		data = netxen_nic_io_read_128M(adapter, addr);
 	} else {		/* Window 0 */
-		write_lock_irqsave(&adapter->adapter_lock, flags);
+		write_lock_irqsave(&adapter->ahw.crb_lock, flags);
 		netxen_nic_pci_set_crbwindow_128M(adapter, 0);
 		data = readl(addr);
 		netxen_nic_pci_set_crbwindow_128M(adapter,
 				NETXEN_WINDOW_ONE);
-		write_unlock_irqrestore(&adapter->adapter_lock, flags);
+		write_unlock_irqrestore(&adapter->ahw.crb_lock, flags);
 	}
 
 	return data;
@@ -1226,12 +1227,12 @@ netxen_nic_hw_write_wx_2M(struct netxen_adapter *adapter, ulong off, u32 data)
 	}
 
 	if (rv == 1) {
-		write_lock_irqsave(&adapter->adapter_lock, flags);
+		write_lock_irqsave(&adapter->ahw.crb_lock, flags);
 		crb_win_lock(adapter);
 		netxen_nic_pci_set_crbwindow_2M(adapter, &off);
 		writel(data, (void __iomem *)off);
 		crb_win_unlock(adapter);
-		write_unlock_irqrestore(&adapter->adapter_lock, flags);
+		write_unlock_irqrestore(&adapter->ahw.crb_lock, flags);
 	} else
 		writel(data, (void __iomem *)off);
 
@@ -1256,12 +1257,12 @@ netxen_nic_hw_read_wx_2M(struct netxen_adapter *adapter, ulong off)
 	}
 
 	if (rv == 1) {
-		write_lock_irqsave(&adapter->adapter_lock, flags);
+		write_lock_irqsave(&adapter->ahw.crb_lock, flags);
 		crb_win_lock(adapter);
 		netxen_nic_pci_set_crbwindow_2M(adapter, &off);
 		data = readl((void __iomem *)off);
 		crb_win_unlock(adapter);
-		write_unlock_irqrestore(&adapter->adapter_lock, flags);
+		write_unlock_irqrestore(&adapter->ahw.crb_lock, flags);
 	} else
 		data = readl((void __iomem *)off);
 
@@ -1272,9 +1273,9 @@ netxen_nic_hw_read_wx_2M(struct netxen_adapter *adapter, ulong off)
 static void netxen_nic_io_write_128M(struct netxen_adapter *adapter,
 		void __iomem *addr, u32 data)
 {
-	read_lock(&adapter->adapter_lock);
+	read_lock(&adapter->ahw.crb_lock);
 	writel(data, addr);
-	read_unlock(&adapter->adapter_lock);
+	read_unlock(&adapter->ahw.crb_lock);
 }
 
 static u32 netxen_nic_io_read_128M(struct netxen_adapter *adapter,
@@ -1282,9 +1283,9 @@ static u32 netxen_nic_io_read_128M(struct netxen_adapter *adapter,
 {
 	u32 val;
 
-	read_lock(&adapter->adapter_lock);
+	read_lock(&adapter->ahw.crb_lock);
 	val = readl(addr);
-	read_unlock(&adapter->adapter_lock);
+	read_unlock(&adapter->ahw.crb_lock);
 
 	return val;
 }
@@ -1366,11 +1367,10 @@ netxen_nic_pci_mem_access_direct(struct netxen_adapter *adapter, u64 off,
 {
 	void __iomem *addr, *mem_ptr = NULL;
 	resource_size_t mem_base;
-	unsigned long flags;
 	int ret = -EIO;
 	u32 start;
 
-	write_lock_irqsave(&adapter->adapter_lock, flags);
+	spin_lock(&adapter->ahw.mem_lock);
 
 	ret = adapter->pci_set_window(adapter, off, &start);
 	if (ret != 0)
@@ -1397,7 +1397,8 @@ noremap:
 		writeq(*data, addr);
 
 unlock:
-	write_unlock_irqrestore(&adapter->adapter_lock, flags);
+	spin_unlock(&adapter->ahw.mem_lock);
+
 	if (mem_ptr)
 		iounmap(mem_ptr);
 	return ret;
@@ -1409,7 +1410,6 @@ static int
 netxen_nic_pci_mem_write_128M(struct netxen_adapter *adapter,
 		u64 off, u64 data)
 {
-	unsigned long   flags;
 	int j, ret;
 	u32 temp, off_lo, off_hi, addr_hi, data_hi, data_lo;
 	void __iomem *mem_crb;
@@ -1453,7 +1453,7 @@ netxen_nic_pci_mem_write_128M(struct netxen_adapter *adapter,
 	return -EIO;
 
 correct:
-	write_lock_irqsave(&adapter->adapter_lock, flags);
+	spin_lock(&adapter->ahw.mem_lock);
 	netxen_nic_pci_set_crbwindow_128M(adapter, 0);
 
 	writel(off_lo, (mem_crb + MIU_TEST_AGT_ADDR_LO));
@@ -1479,7 +1479,7 @@ correct:
 		ret = 0;
 
 	netxen_nic_pci_set_crbwindow_128M(adapter, NETXEN_WINDOW_ONE);
-	write_unlock_irqrestore(&adapter->adapter_lock, flags);
+	spin_unlock(&adapter->ahw.mem_lock);
 	return ret;
 }
 
@@ -1487,7 +1487,6 @@ static int
 netxen_nic_pci_mem_read_128M(struct netxen_adapter *adapter,
 		u64 off, u64 *data)
 {
-	unsigned long   flags;
 	int j, ret;
 	u32 temp, off_lo, off_hi, addr_hi, data_hi, data_lo;
 	u64 val;
@@ -1532,7 +1531,7 @@ netxen_nic_pci_mem_read_128M(struct netxen_adapter *adapter,
 	return -EIO;
 
 correct:
-	write_lock_irqsave(&adapter->adapter_lock, flags);
+	spin_lock(&adapter->ahw.mem_lock);
 	netxen_nic_pci_set_crbwindow_128M(adapter, 0);
 
 	writel(off_lo, (mem_crb + MIU_TEST_AGT_ADDR_LO));
@@ -1561,7 +1560,7 @@ correct:
 	}
 
 	netxen_nic_pci_set_crbwindow_128M(adapter, NETXEN_WINDOW_ONE);
-	write_unlock_irqrestore(&adapter->adapter_lock, flags);
+	spin_unlock(&adapter->ahw.mem_lock);
 
 	return ret;
 }
@@ -1570,7 +1569,6 @@ static int
 netxen_nic_pci_mem_write_2M(struct netxen_adapter *adapter,
 		u64 off, u64 data)
 {
-	unsigned long   flags;
 	int j, ret;
 	u32 temp, off8;
 	void __iomem *mem_crb;
@@ -1601,7 +1599,7 @@ netxen_nic_pci_mem_write_2M(struct netxen_adapter *adapter,
 correct:
 	off8 = off & MIU_TEST_AGT_ADDR_MASK;
 
-	write_lock_irqsave(&adapter->adapter_lock, flags);
+	spin_lock(&adapter->ahw.mem_lock);
 
 	writel(off8, (mem_crb + MIU_TEST_AGT_ADDR_LO));
 	writel(0, (mem_crb + MIU_TEST_AGT_ADDR_HI));
@@ -1625,7 +1623,7 @@ correct:
 	} else
 		ret = 0;
 
-	write_unlock_irqrestore(&adapter->adapter_lock, flags);
+	spin_unlock(&adapter->ahw.mem_lock);
 
 	return ret;
 }
@@ -1634,7 +1632,6 @@ static int
 netxen_nic_pci_mem_read_2M(struct netxen_adapter *adapter,
 		u64 off, u64 *data)
 {
-	unsigned long   flags;
 	int j, ret;
 	u32 temp, off8;
 	u64 val;
@@ -1668,7 +1665,7 @@ netxen_nic_pci_mem_read_2M(struct netxen_adapter *adapter,
 correct:
 	off8 = off & MIU_TEST_AGT_ADDR_MASK;
 
-	write_lock_irqsave(&adapter->adapter_lock, flags);
+	spin_lock(&adapter->ahw.mem_lock);
 
 	writel(off8, (mem_crb + MIU_TEST_AGT_ADDR_LO));
 	writel(0, (mem_crb + MIU_TEST_AGT_ADDR_HI));
@@ -1694,7 +1691,7 @@ correct:
 		ret = 0;
 	}
 
-	write_unlock_irqrestore(&adapter->adapter_lock, flags);
+	spin_unlock(&adapter->ahw.mem_lock);
 
 	return ret;
 }