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sfxge(4): update external port number calculation

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Revise the external port calculation to support all
X2 port modes. The previous algorithm could not
handle different port numbering schemes on each cage.

Submitted by:   Richard Houldsworth <rhouldsworth at solarflare.com>
Sponsored by:   Solarflare Communications, Inc.
Differential Revision:  https://reviews.freebsd.org/D18285
This commit is contained in:
arybchik 2018-11-30 07:10:32 +00:00
parent 66a2168273
commit 81225144c9
1 changed files with 48 additions and 39 deletions
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87
sys/dev/sfxge/common/ef10_nic.c
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@ -1468,6 +1468,9 @@ ef10_get_privilege_mask(
}
#define EFX_EXT_PORT_MAX 4
#define EFX_EXT_PORT_NA 0xFF
/*
* Table of mapping schemes from port number to external number.
*
@ -1481,7 +1484,7 @@ ef10_get_privilege_mask(
* port mapping (n:1)
* |
* v
* External port number (normally 1-based)
* External port number (1-based)
* |
* fixed (1:1) or cable assembly (1:m)
* |
@ -1493,9 +1496,8 @@ ef10_get_privilege_mask(
* how to determine which external cage/magjack corresponds to the port
* numbers used by the driver.
*
* The count of adjacent port numbers that map to each external number,
* and the offset in the numbering, is determined by the chip family and
* current port mode.
* The count of consecutive port numbers that map to each external number,
* is determined by the chip family and the current port mode.
*
* For the Huntington family, the current port mode cannot be discovered,
* but a single mapping is used by all modes for a given chip variant,
@ -1506,8 +1508,7 @@ ef10_get_privilege_mask(
static struct ef10_external_port_map_s {
efx_family_t family;
uint32_t modes_mask;
int32_t count;
int32_t offset;
uint8_t base_port[EFX_EXT_PORT_MAX];
} __ef10_external_port_mappings[] = {
/*
* Modes used by Huntington family controllers where each port
@ -1526,8 +1527,7 @@ static struct ef10_external_port_map_s {
(1U << TLV_PORT_MODE_10G) | /* mode 0 */
(1U << TLV_PORT_MODE_10G_10G) | /* mode 2 */
(1U << TLV_PORT_MODE_10G_10G_10G_10G), /* mode 4 */
1, /* ports per cage */
1 /* first cage */
{ 0, 1, 2, 3 }
},
/*
* Modes which for Huntington identify a chip variant where 2
@ -1544,8 +1544,7 @@ static struct ef10_external_port_map_s {
(1U << TLV_PORT_MODE_40G_40G) | /* mode 3 */
(1U << TLV_PORT_MODE_40G_10G_10G) | /* mode 6 */
(1U << TLV_PORT_MODE_10G_10G_40G), /* mode 7 */
2, /* ports per cage */
1 /* first cage */
{ 0, 2, EFX_EXT_PORT_NA, EFX_EXT_PORT_NA }
},
/*
* Modes that on Medford allocate each port number to a separate
@ -1559,8 +1558,7 @@ static struct ef10_external_port_map_s {
EFX_FAMILY_MEDFORD,
(1U << TLV_PORT_MODE_1x1_NA) | /* mode 0 */
(1U << TLV_PORT_MODE_1x1_1x1), /* mode 2 */
1, /* ports per cage */
1 /* first cage */
{ 0, 1, 2, 3 }
},
/*
* Modes that on Medford allocate 2 adjacent port numbers to each
@ -1578,8 +1576,7 @@ static struct ef10_external_port_map_s {
(1U << TLV_PORT_MODE_2x1_1x4) | /* mode 7 */
/* Do not use 10G_10G_10G_10G_Q1_Q2 (see bug63270) */
(1U << TLV_PORT_MODE_10G_10G_10G_10G_Q1_Q2), /* mode 9 */
2, /* ports per cage */
1 /* first cage */
{ 0, 2, EFX_EXT_PORT_NA, EFX_EXT_PORT_NA }
},
/*
* Modes that on Medford allocate 4 adjacent port numbers to each
@ -1594,8 +1591,7 @@ static struct ef10_external_port_map_s {
(1U << TLV_PORT_MODE_2x1_2x1) | /* mode 5 */
/* Do not use 10G_10G_10G_10G_Q1 (see bug63270) */
(1U << TLV_PORT_MODE_4x1_NA), /* mode 4 */
4, /* ports per cage */
1 /* first cage */
{ 0, EFX_EXT_PORT_NA, EFX_EXT_PORT_NA, EFX_EXT_PORT_NA }
},
/*
* Modes that on Medford allocate 4 adjacent port numbers to each
@ -1608,8 +1604,7 @@ static struct ef10_external_port_map_s {
{
EFX_FAMILY_MEDFORD,
(1U << TLV_PORT_MODE_NA_4x1), /* mode 8 */
4, /* ports per cage */
2 /* first cage */
{ EFX_EXT_PORT_NA, 0, EFX_EXT_PORT_NA, EFX_EXT_PORT_NA }
},
/*
* Modes that on Medford2 allocate each port number to a separate
@ -1628,16 +1623,21 @@ static struct ef10_external_port_map_s {
(1U << TLV_PORT_MODE_1x2_1x2) | /* mode 12 */
(1U << TLV_PORT_MODE_1x4_1x2) | /* mode 15 */
(1U << TLV_PORT_MODE_1x2_1x4), /* mode 16 */
1, /* ports per cage */
1 /* first cage */
{ 0, 1, 2, 3 }
},
/*
* FIXME: Some port modes are not representable in this mapping:
* - TLV_PORT_MODE_1x2_2x1 (mode 17):
* Modes that on Medford2 allocate 1 port to cage 1 and the rest
* to cage 2.
* port 0 -> cage 1
* port 1 -> cage 2
* port 2 -> cage 2
*/
{
EFX_FAMILY_MEDFORD2,
(1U << TLV_PORT_MODE_1x2_2x1) | /* mode 17 */
(1U << TLV_PORT_MODE_1x4_2x1), /* mode 6 */
{ 0, 1, EFX_EXT_PORT_NA, EFX_EXT_PORT_NA }
},
/*
* Modes that on Medford2 allocate 2 adjacent port numbers to each
* cage, starting on cage 1.
@ -1654,8 +1654,7 @@ static struct ef10_external_port_map_s {
(1U << TLV_PORT_MODE_2x1_1x4) | /* mode 7 */
(1U << TLV_PORT_MODE_2x2_NA) | /* mode 13 */
(1U << TLV_PORT_MODE_2x1_1x2), /* mode 18 */
2, /* ports per cage */
1 /* first cage */
{ 0, 2, EFX_EXT_PORT_NA, EFX_EXT_PORT_NA }
},
/*
* Modes that on Medford2 allocate 2 adjacent port numbers to each
@ -1666,8 +1665,7 @@ static struct ef10_external_port_map_s {
{
EFX_FAMILY_MEDFORD2,
(1U << TLV_PORT_MODE_NA_2x2), /* mode 14 */
2, /* ports per cage */
2 /* first cage */
{ EFX_EXT_PORT_NA, 0, EFX_EXT_PORT_NA, EFX_EXT_PORT_NA }
},
/*
* Modes that on Medford2 allocate 4 adjacent port numbers to each
@ -1680,8 +1678,7 @@ static struct ef10_external_port_map_s {
{
EFX_FAMILY_MEDFORD2,
(1U << TLV_PORT_MODE_4x1_NA), /* mode 5 */
4, /* ports per cage */
1 /* first cage */
{ 0, EFX_EXT_PORT_NA, EFX_EXT_PORT_NA, EFX_EXT_PORT_NA }
},
/*
* Modes that on Medford2 allocate 4 adjacent port numbers to each
@ -1695,8 +1692,7 @@ static struct ef10_external_port_map_s {
EFX_FAMILY_MEDFORD2,
(1U << TLV_PORT_MODE_NA_4x1) | /* mode 8 */
(1U << TLV_PORT_MODE_NA_1x2), /* mode 11 */
4, /* ports per cage */
2 /* first cage */
{ EFX_EXT_PORT_NA, 0, EFX_EXT_PORT_NA, EFX_EXT_PORT_NA }
},
};
@ -1711,8 +1707,8 @@ ef10_external_port_mapping(
uint32_t port_modes;
uint32_t matches;
uint32_t current;
int32_t count = 1; /* Default 1-1 mapping */
int32_t offset = 1; /* Default starting external port number */
struct ef10_external_port_map_s *mapp = NULL;
int ext_index = port; /* Default 1-1 mapping */
if ((rc = efx_mcdi_get_port_modes(enp, &port_modes, &current,
NULL)) != 0) {
@ -1749,8 +1745,7 @@ ef10_external_port_mapping(
* there will be multiple matches. The mapping on the
* last match is used.
*/
count = eepmp->count;
offset = eepmp->offset;
mapp = eepmp;
port_modes &= ~matches;
}
}
@ -1762,11 +1757,25 @@ ef10_external_port_mapping(
}
out:
/*
* Scale as required by last matched mode and then convert to
* correctly offset numbering
*/
*external_portp = (uint8_t)((port / count) + offset);
if (mapp != NULL) {
/*
* External ports are assigned a sequence of consecutive
* port numbers, so find the one with the closest base_port.
*/
uint32_t delta = EFX_EXT_PORT_NA;
for (i = 0; i < EFX_EXT_PORT_MAX; i++) {
uint32_t base = mapp->base_port[i];
if ((base != EFX_EXT_PORT_NA) && (base <= port)) {
if ((port - base) < delta) {
delta = (port - base);
ext_index = i;
}
}
}
}
*external_portp = (uint8_t)(ext_index + 1);
return (0);
fail1: