netxen: implement generic pcie semaphore functions
Implement common function for locking/unlocking 8 hardware
semaphores used for serializing access to shared resouces
on a NIC board by different PCI functions.
As by definition, callers of these semaphore API can be
put to sleep till the semaphore is locked.
Signed-off-by: Dhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/netxen/netxen_nic_hw.c b/drivers/net/netxen/netxen_nic_hw.c
index 9138bbc..cbfe44c 100644
--- a/drivers/net/netxen/netxen_nic_hw.c
+++ b/drivers/net/netxen/netxen_nic_hw.c
@@ -86,7 +86,6 @@
return NULL;
}
-#define CRB_WIN_LOCK_TIMEOUT 100000000
static crb_128M_2M_block_map_t
crb_128M_2M_map[64] __cacheline_aligned_in_smp = {
{{{0, 0, 0, 0} } }, /* 0: PCI */
@@ -320,6 +319,35 @@
#define NETXEN_WINDOW_ONE 0x2000000 /*CRB Window: bit 25 of CRB address */
+#define NETXEN_PCIE_SEM_TIMEOUT 10000
+
+int
+netxen_pcie_sem_lock(struct netxen_adapter *adapter, int sem, u32 id_reg)
+{
+ int done = 0, timeout = 0;
+
+ while (!done) {
+ done = NXRD32(adapter, NETXEN_PCIE_REG(PCIE_SEM_LOCK(sem)));
+ if (done == 1)
+ break;
+ if (++timeout >= NETXEN_PCIE_SEM_TIMEOUT)
+ return -1;
+ msleep(1);
+ }
+
+ if (id_reg)
+ NXWR32(adapter, id_reg, adapter->portnum);
+
+ return 0;
+}
+
+void
+netxen_pcie_sem_unlock(struct netxen_adapter *adapter, int sem)
+{
+ int val;
+ val = NXRD32(adapter, NETXEN_PCIE_REG(PCIE_SEM_UNLOCK(sem)));
+}
+
#define NETXEN_UNICAST_ADDR(port, index) \
(NETXEN_UNICAST_ADDR_BASE+(port*32)+(index*8))
#define NETXEN_MCAST_ADDR(port, index) \
@@ -906,33 +934,6 @@
return 0;
}
-#define CRB_WIN_LOCK_TIMEOUT 100000000
-
-static int crb_win_lock(struct netxen_adapter *adapter)
-{
- int done = 0, timeout = 0;
-
- while (!done) {
- /* acquire semaphore3 from PCI HW block */
- done = NXRD32(adapter, NETXEN_PCIE_REG(PCIE_SEM7_LOCK));
- if (done == 1)
- break;
- if (timeout >= CRB_WIN_LOCK_TIMEOUT)
- return -1;
- timeout++;
- udelay(1);
- }
- NXWR32(adapter, NETXEN_CRB_WIN_LOCK_ID, adapter->portnum);
- return 0;
-}
-
-static void crb_win_unlock(struct netxen_adapter *adapter)
-{
- int val;
-
- val = NXRD32(adapter, NETXEN_PCIE_REG(PCIE_SEM7_UNLOCK));
-}
-
/*
* Changes the CRB window to the specified window.
*/