Commit 483f97f8 authored by Ben Hutchings's avatar Ben Hutchings Committed by David S. Miller

sfc: Use 64-bit writes for TX push where possible

This was originally done as part of commit
65f0b417 ("sfc: Use write-combining to
reduce TX latency"), but that had to be reverted.
Signed-off-by: default avatarBen Hutchings <bhutchings@solarflare.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 86c432ca
......@@ -48,9 +48,9 @@
* replacing the low 96 bits with zero does not affect functionality.
* - If the host writes to the last dword address of such a register
* (i.e. the high 32 bits) the underlying register will always be
* written. If the collector does not hold values for the low 96
* bits of the register, they will be written as zero. Writing to
* the last qword does not have this effect and must not be done.
* written. If the collector and the current write together do not
* provide values for all 128 bits of the register, the low 96 bits
* will be written as zero.
* - If the host writes to the address of any other part of such a
* register while the collector already holds values for some other
* register, the write is discarded and the collector maintains its
......@@ -237,12 +237,13 @@ static inline void _efx_writeo_page(struct efx_nic *efx, efx_oword_t *value,
#ifdef EFX_USE_QWORD_IO
_efx_writeq(efx, value->u64[0], reg + 0);
_efx_writeq(efx, value->u64[1], reg + 8);
#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);
#endif
}
#define efx_writeo_page(efx, value, reg, page) \
_efx_writeo_page(efx, value, \
......
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