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common/sfc_efx/base: provide helper to check Rx prefix

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A new function allows to check if used Rx prefix layout matches
available Rx prefix layout. Length check is out-of-scope of the
function and caller should ensure length is either checked or
different length with everything required in place is handled
properly.

Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
This commit is contained in:
Andrew Rybchenko 2020-10-13 14:45:46 +01:00 committed by Ferruh Yigit
parent f784cdc5cb
commit 840478c2f8
3 changed files with 53 additions and 0 deletions
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12
drivers/common/sfc_efx/base/efx.h
View File

@ -2920,6 +2920,18 @@ typedef struct efx_rx_prefix_layout_s {
efx_rx_prefix_field_info_t erpl_fields[EFX_RX_PREFIX_NFIELDS];
} efx_rx_prefix_layout_t;
/*
* Helper function to find out a bit mask of wanted but not available
* Rx prefix fields.
*
* A field is considered as not available if any parameter mismatch.
*/
LIBEFX_API
extern __checkReturn uint32_t
efx_rx_prefix_layout_check(
__in const efx_rx_prefix_layout_t *available,
__in const efx_rx_prefix_layout_t *wanted);
LIBEFX_API
extern __checkReturn efx_rc_t
efx_rx_prefix_get_layout(

40
drivers/common/sfc_efx/base/efx_rx.c
View File

@ -1803,3 +1803,43 @@ siena_rx_fini(
}
#endif /* EFSYS_OPT_SIENA */
static __checkReturn boolean_t
efx_rx_prefix_layout_fields_match(
__in const efx_rx_prefix_field_info_t *erpfip1,
__in const efx_rx_prefix_field_info_t *erpfip2)
{
if (erpfip1->erpfi_offset_bits != erpfip2->erpfi_offset_bits)
return (B_FALSE);
if (erpfip1->erpfi_width_bits != erpfip2->erpfi_width_bits)
return (B_FALSE);
if (erpfip1->erpfi_big_endian != erpfip2->erpfi_big_endian)
return (B_FALSE);
return (B_TRUE);
}
__checkReturn uint32_t
efx_rx_prefix_layout_check(
__in const efx_rx_prefix_layout_t *available,
__in const efx_rx_prefix_layout_t *wanted)
{
uint32_t result = 0;
unsigned int i;
EFX_STATIC_ASSERT(EFX_RX_PREFIX_NFIELDS < sizeof (result) * 8);
for (i = 0; i < EFX_RX_PREFIX_NFIELDS; ++i) {
/* Skip the field if driver does not want to use it */
if (wanted->erpl_fields[i].erpfi_width_bits == 0)
continue;
if (efx_rx_prefix_layout_fields_match(
&available->erpl_fields[i],
&wanted->erpl_fields[i]) == B_FALSE)
result |= (1U << i);
}
return (result);
}

1
drivers/common/sfc_efx/rte_common_sfc_efx_version.map
View File

@ -141,6 +141,7 @@ INTERNAL {
efx_rx_hash_default_support_get;
efx_rx_init;
efx_rx_prefix_get_layout;
efx_rx_prefix_layout_check;
efx_rx_qcreate;
efx_rx_qcreate_es_super_buffer;
efx_rx_qdestroy;