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sfc: Add compile-time checks for correctness of paged register writes 

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
This commit is contained in:
Ben Hutchings 2010-12-06 22:55:33 +00:00
parent 494bdf1b0f
commit 1a29cc4011
1 changed files with 23 additions and 8 deletions
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31
drivers/net/sfc/io.h
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@ -226,29 +226,40 @@ static inline void efx_readd_table(struct efx_nic *efx, efx_dword_t *value,
((page) * EFX_PAGE_BLOCK_SIZE + (reg))
/* Write the whole of RX_DESC_UPD or TX_DESC_UPD */
static inline void efx_writeo_page(struct efx_nic *efx, efx_oword_t *value,
unsigned int reg, unsigned int page)
static inline void _efx_writeo_page(struct efx_nic *efx, efx_oword_t *value,
unsigned int reg, unsigned int page)
{
efx_writeo(efx, value, EFX_PAGED_REG(page, reg));
}
#define efx_writeo_page(efx, value, reg, page) \
_efx_writeo_page(efx, value, \
reg + \
BUILD_BUG_ON_ZERO((reg) != 0x830 && (reg) != 0xa10), \
page)
/* Write a page-mapped 32-bit CSR (EVQ_RPTR or the high bits of
* RX_DESC_UPD or TX_DESC_UPD)
*/
static inline void efx_writed_page(struct efx_nic *efx, efx_dword_t *value,
unsigned int reg, unsigned int page)
static inline void _efx_writed_page(struct efx_nic *efx, efx_dword_t *value,
unsigned int reg, unsigned int page)
{
efx_writed(efx, value, EFX_PAGED_REG(page, reg));
}
#define efx_writed_page(efx, value, reg, page) \
_efx_writed_page(efx, value, \
reg + \
BUILD_BUG_ON_ZERO((reg) != 0x400 && (reg) != 0x83c \
&& (reg) != 0xa1c), \
page)
/* Write TIMER_COMMAND. This is a page-mapped 32-bit CSR, but a bug
* in the BIU means that writes to TIMER_COMMAND[0] invalidate the
* collector register.
*/
static inline void efx_writed_page_locked(struct efx_nic *efx,
efx_dword_t *value,
unsigned int reg,
unsigned int page)
static inline void _efx_writed_page_locked(struct efx_nic *efx,
efx_dword_t *value,
unsigned int reg,
unsigned int page)
{
unsigned long flags __attribute__ ((unused));
@ -260,5 +271,9 @@ static inline void efx_writed_page_locked(struct efx_nic *efx,
efx_writed(efx, value, EFX_PAGED_REG(page, reg));
}
}
#define efx_writed_page_locked(efx, value, reg, page) \
_efx_writed_page_locked(efx, value, \
reg + BUILD_BUG_ON_ZERO((reg) != 0x420), \
page)
#endif /* EFX_IO_H */