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| author | Ben Hutchings | 2010-12-06 23:58:41 +0100 |
|---|---|---|
| committer | Ben Hutchings | 2010-12-06 23:58:41 +0100 |
| commit | e506147271229d6c53b42c6a9897db67b5cfdb6d (patch) | |
| tree | fc6f867fb38004dea15b5ba06b746e2895570181 /drivers/net/sfc | |
| parent | sfc: Add compile-time checks for correctness of paged register writes (diff) | |
| download | kernel-qcow2-linux-e506147271229d6c53b42c6a9897db67b5cfdb6d.tar.gz kernel-qcow2-linux-e506147271229d6c53b42c6a9897db67b5cfdb6d.tar.xz kernel-qcow2-linux-e506147271229d6c53b42c6a9897db67b5cfdb6d.zip | |
sfc: Remove locking from implementation of efx_writeo_paged()
It is not necessary to serialise writes to the paged 128-bit
registers. However, if we don't then we must always write the last
dword separately, not as part of a qword write.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Diffstat (limited to 'drivers/net/sfc')
| -rw-r--r-- | drivers/net/sfc/io.h | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/drivers/net/sfc/io.h b/drivers/net/sfc/io.h index 7f3adf29d6f6..6da4ae20a039 100644 --- a/drivers/net/sfc/io.h +++ b/drivers/net/sfc/io.h @@ -229,7 +229,20 @@ static inline void efx_readd_table(struct efx_nic *efx, efx_dword_t *value, 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)); + reg = EFX_PAGED_REG(page, reg); + + netif_vdbg(efx, hw, efx->net_dev, + "writing register %x with " EFX_OWORD_FMT "\n", reg, + EFX_OWORD_VAL(*value)); + +#ifdef EFX_USE_QWORD_IO + _efx_writeq(efx, value->u64[0], reg + 0); +#else + _efx_writed(efx, value->u32[0], reg + 0); + _efx_writed(efx, value->u32[1], reg + 4); +#endif + _efx_writed(efx, value->u32[2], reg + 8); + _efx_writed(efx, value->u32[3], reg + 12); } #define efx_writeo_page(efx, value, reg, page) \ _efx_writeo_page(efx, value, \ |