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[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>
This commit is contained in:
Michael Chan 2005-08-09 20:16:32 -07:00 committed by David S. Miller
parent 757f612e09
commit 2009493065
2 changed files with 31 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

34
drivers/net/tg3.c
View File

@ -366,7 +366,7 @@ static void _tw32_flush(struct tg3 *tp, u32 off, u32 val)
}
}
static inline void _tw32_rx_mbox(struct tg3 *tp, u32 off, u32 val)
static void tg3_write32_rx_mbox(struct tg3 *tp, u32 off, u32 val)
{
void __iomem *mbox = tp->regs + off;
writel(val, mbox);
@ -374,7 +374,7 @@ static inline void _tw32_rx_mbox(struct tg3 *tp, u32 off, u32 val)
readl(mbox);
}
static inline void _tw32_tx_mbox(struct tg3 *tp, u32 off, u32 val)
static void tg3_write32_tx_mbox(struct tg3 *tp, u32 off, u32 val)
{
void __iomem *mbox = tp->regs + off;
writel(val, mbox);
@ -384,17 +384,23 @@ static inline void _tw32_tx_mbox(struct tg3 *tp, u32 off, u32 val)
readl(mbox);
}
#define tw32_mailbox(reg, val) writel(((val) & 0xffffffff), tp->regs + (reg))
#define tw32_rx_mbox(reg, val) _tw32_rx_mbox(tp, reg, val)
#define tw32_tx_mbox(reg, val) _tw32_tx_mbox(tp, reg, val)
static void tg3_write32(struct tg3 *tp, u32 off, u32 val)
{
writel(val, tp->regs + off);
}
#define tw32(reg,val) tg3_write_indirect_reg32(tp,(reg),(val))
static u32 tg3_read32(struct tg3 *tp, u32 off)
{
return (readl(tp->regs + off));
}
#define tw32_mailbox(reg, val) tp->write32_mbox(tp, reg, val)
#define tw32_rx_mbox(reg, val) tp->write32_rx_mbox(tp, reg, val)
#define tw32_tx_mbox(reg, val) tp->write32_tx_mbox(tp, reg, val)
#define tw32(reg,val) tp->write32(tp, reg, val)
#define tw32_f(reg,val) _tw32_flush(tp,(reg),(val))
#define tw16(reg,val) writew(((val) & 0xffff), tp->regs + (reg))
#define tw8(reg,val) writeb(((val) & 0xff), tp->regs + (reg))
#define tr32(reg) readl(tp->regs + (reg))
#define tr16(reg) readw(tp->regs + (reg))
#define tr8(reg) readb(tp->regs + (reg))
#define tr32(reg) tp->read32(tp, reg)
static void tg3_write_mem(struct tg3 *tp, u32 off, u32 val)
{
@ -9325,6 +9331,12 @@ static int __devinit tg3_get_invariants(struct tg3 *tp)
pci_write_config_dword(tp->pdev, TG3PCI_PCISTATE, pci_state_reg);
}
tp->read32 = tg3_read32;
tp->write32 = tg3_write_indirect_reg32;
tp->write32_mbox = tg3_write32;
tp->write32_tx_mbox = tg3_write32_tx_mbox;
tp->write32_rx_mbox = tg3_write32_rx_mbox;
/* Get eeprom hw config before calling tg3_set_power_state().
* In particular, the TG3_FLAG_EEPROM_WRITE_PROT flag must be
* determined before calling tg3_set_power_state() so that

8
drivers/net/tg3.h
View File

@ -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;