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netxen: implement generic pcie semaphore functions

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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>
This commit is contained in:
Dhananjay Phadke
2009-08-24 19:23:26 +00:00
committed by David S. Miller
parent cb7e4b6e37
commit c9517e5893
6 changed files with 71 additions and 144 deletions
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8
drivers/net/netxen/netxen_nic_hdr.h
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@@ -899,16 +899,24 @@ enum {
#define PCIE_DCR 0x00d8
#define PCIE_SEM0_LOCK (0x1c000)
#define PCIE_SEM0_UNLOCK (0x1c004)
#define PCIE_SEM1_LOCK (0x1c008)
#define PCIE_SEM1_UNLOCK (0x1c00c)
#define PCIE_SEM2_LOCK (0x1c010) /* Flash lock */
#define PCIE_SEM2_UNLOCK (0x1c014) /* Flash unlock */
#define PCIE_SEM3_LOCK (0x1c018) /* Phy lock */
#define PCIE_SEM3_UNLOCK (0x1c01c) /* Phy unlock */
#define PCIE_SEM4_LOCK (0x1c020)
#define PCIE_SEM4_UNLOCK (0x1c024)
#define PCIE_SEM5_LOCK (0x1c028) /* API lock */
#define PCIE_SEM5_UNLOCK (0x1c02c) /* API unlock */
#define PCIE_SEM6_LOCK (0x1c030) /* sw lock */
#define PCIE_SEM6_UNLOCK (0x1c034) /* sw unlock */
#define PCIE_SEM7_LOCK (0x1c038) /* crb win lock */
#define PCIE_SEM7_UNLOCK (0x1c03c) /* crbwin unlock*/
#define PCIE_SEM_LOCK(N) (PCIE_SEM0_LOCK + 8*(N))
#define PCIE_SEM_UNLOCK(N) (PCIE_SEM0_UNLOCK + 8*(N))
#define PCIE_SETUP_FUNCTION (0x12040)
#define PCIE_SETUP_FUNCTION2 (0x12048)