[TG3]: Add basic register access function pointers

This patch adds the basic function pointers to do register accesses in
the fast path. This was suggested by David Miller. The idea is that
various register access methods for different hardware errata can easily
be implemented with these function pointers and performance will not be
degraded on chips that use normal register access methods.

The various register read write macros (e.g. tw32, tr32, tw32_mailbox)
are redefined to call the function pointers.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/net/tg3.h b/drivers/net/tg3.h
index 5c4433c147fa..394acddd53b3 100644
--- a/drivers/net/tg3.h
+++ b/drivers/net/tg3.h
@@ -2049,6 +2049,10 @@ struct tg3 {
         spinlock_t                      lock;
         spinlock_t                      indirect_lock;
 
+        u32                             (*read32) (struct tg3 *, u32);
+        void                            (*write32) (struct tg3 *, u32, u32);
+        void                            (*write32_mbox) (struct tg3 *, u32,
+                                                         u32);
         void __iomem                    *regs;
         struct net_device               *dev;
         struct pci_dev                  *pdev;
@@ -2060,6 +2064,8 @@ struct tg3 {
         u32                             msg_enable;
 
         /* begin "tx thread" cacheline section */
+        void                            (*write32_tx_mbox) (struct tg3 *, u32,
+                                                            u32);
         u32                             tx_prod;
         u32                             tx_cons;
         u32                             tx_pending;
@@ -2071,6 +2077,8 @@ struct tg3 {
         dma_addr_t                      tx_desc_mapping;
 
         /* begin "rx thread" cacheline section */
+        void                            (*write32_rx_mbox) (struct tg3 *, u32,
+                                                            u32);
         u32                             rx_rcb_ptr;
         u32                             rx_std_ptr;
         u32                             rx_jumbo_ptr;