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mirror_ubuntu-kernels/drivers/infiniband/hw/hfi1/platform.c

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// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
/*
* Copyright(c) 2015, 2016 Intel Corporation.
*/
#include <linux/firmware.h>
#include "hfi.h"
#include "efivar.h"
#include "eprom.h"
#define DEFAULT_PLATFORM_CONFIG_NAME "hfi1_platform.dat"
static int validate_scratch_checksum(struct hfi1_devdata *dd)
{
u64 checksum = 0, temp_scratch = 0;
int i, j, version;
temp_scratch = read_csr(dd, ASIC_CFG_SCRATCH);
version = (temp_scratch & BITMAP_VERSION_SMASK) >> BITMAP_VERSION_SHIFT;
/* Prevent power on default of all zeroes from passing checksum */
if (!version) {
dd_dev_err(dd, "%s: Config bitmap uninitialized\n", __func__);
dd_dev_err(dd,
"%s: Please update your BIOS to support active channels\n",
__func__);
return 0;
}
/*
* ASIC scratch 0 only contains the checksum and bitmap version as
* fields of interest, both of which are handled separately from the
* loop below, so skip it
*/
checksum += version;
for (i = 1; i < ASIC_NUM_SCRATCH; i++) {
temp_scratch = read_csr(dd, ASIC_CFG_SCRATCH + (8 * i));
for (j = sizeof(u64); j != 0; j -= 2) {
checksum += (temp_scratch & 0xFFFF);
temp_scratch >>= 16;
}
}
while (checksum >> 16)
checksum = (checksum & CHECKSUM_MASK) + (checksum >> 16);
temp_scratch = read_csr(dd, ASIC_CFG_SCRATCH);
temp_scratch &= CHECKSUM_SMASK;
temp_scratch >>= CHECKSUM_SHIFT;
if (checksum + temp_scratch == 0xFFFF)
return 1;
dd_dev_err(dd, "%s: Configuration bitmap corrupted\n", __func__);
return 0;
}
static void save_platform_config_fields(struct hfi1_devdata *dd)
{
struct hfi1_pportdata *ppd = dd->pport;
u64 temp_scratch = 0, temp_dest = 0;
temp_scratch = read_csr(dd, ASIC_CFG_SCRATCH_1);
temp_dest = temp_scratch &
(dd->hfi1_id ? PORT1_PORT_TYPE_SMASK :
PORT0_PORT_TYPE_SMASK);
ppd->port_type = temp_dest >>
(dd->hfi1_id ? PORT1_PORT_TYPE_SHIFT :
PORT0_PORT_TYPE_SHIFT);
temp_dest = temp_scratch &
(dd->hfi1_id ? PORT1_LOCAL_ATTEN_SMASK :
PORT0_LOCAL_ATTEN_SMASK);
ppd->local_atten = temp_dest >>
(dd->hfi1_id ? PORT1_LOCAL_ATTEN_SHIFT :
PORT0_LOCAL_ATTEN_SHIFT);
temp_dest = temp_scratch &
(dd->hfi1_id ? PORT1_REMOTE_ATTEN_SMASK :
PORT0_REMOTE_ATTEN_SMASK);
ppd->remote_atten = temp_dest >>
(dd->hfi1_id ? PORT1_REMOTE_ATTEN_SHIFT :
PORT0_REMOTE_ATTEN_SHIFT);
temp_dest = temp_scratch &
(dd->hfi1_id ? PORT1_DEFAULT_ATTEN_SMASK :
PORT0_DEFAULT_ATTEN_SMASK);
ppd->default_atten = temp_dest >>
(dd->hfi1_id ? PORT1_DEFAULT_ATTEN_SHIFT :
PORT0_DEFAULT_ATTEN_SHIFT);
temp_scratch = read_csr(dd, dd->hfi1_id ? ASIC_CFG_SCRATCH_3 :
ASIC_CFG_SCRATCH_2);
ppd->tx_preset_eq = (temp_scratch & TX_EQ_SMASK) >> TX_EQ_SHIFT;
ppd->tx_preset_noeq = (temp_scratch & TX_NO_EQ_SMASK) >> TX_NO_EQ_SHIFT;
ppd->rx_preset = (temp_scratch & RX_SMASK) >> RX_SHIFT;
ppd->max_power_class = (temp_scratch & QSFP_MAX_POWER_SMASK) >>
QSFP_MAX_POWER_SHIFT;
ppd->config_from_scratch = true;
}
void get_platform_config(struct hfi1_devdata *dd)
{
int ret = 0;
u8 *temp_platform_config = NULL;
u32 esize;
const struct firmware *platform_config_file = NULL;
if (is_integrated(dd)) {
if (validate_scratch_checksum(dd)) {
save_platform_config_fields(dd);
return;
}
} else {
ret = eprom_read_platform_config(dd,
(void **)&temp_platform_config,
&esize);
if (!ret) {
/* success */
dd->platform_config.data = temp_platform_config;
dd->platform_config.size = esize;
return;
}
}
dd_dev_err(dd,
"%s: Failed to get platform config, falling back to sub-optimal default file\n",
__func__);
ret = request_firmware(&platform_config_file,
DEFAULT_PLATFORM_CONFIG_NAME,
&dd->pcidev->dev);
if (ret) {
dd_dev_err(dd,
"%s: No default platform config file found\n",
__func__);
return;
}
/*
* Allocate separate memory block to store data and free firmware
* structure. This allows free_platform_config to treat EPROM and
* fallback configs in the same manner.
*/
dd->platform_config.data = kmemdup(platform_config_file->data,
platform_config_file->size,
GFP_KERNEL);
dd->platform_config.size = platform_config_file->size;
release_firmware(platform_config_file);
}
void free_platform_config(struct hfi1_devdata *dd)
{
/* Release memory allocated for eprom or fallback file read. */
kfree(dd->platform_config.data);
dd->platform_config.data = NULL;
}
void get_port_type(struct hfi1_pportdata *ppd)
{
int ret;
u32 temp;
ret = get_platform_config_field(ppd->dd, PLATFORM_CONFIG_PORT_TABLE, 0,
PORT_TABLE_PORT_TYPE, &temp,
4);
if (ret) {
ppd->port_type = PORT_TYPE_UNKNOWN;
return;
}
ppd->port_type = temp;
}
int set_qsfp_tx(struct hfi1_pportdata *ppd, int on)
{
u8 tx_ctrl_byte = on ? 0x0 : 0xF;
int ret = 0;
ret = qsfp_write(ppd, ppd->dd->hfi1_id, QSFP_TX_CTRL_BYTE_OFFS,
&tx_ctrl_byte, 1);
/* we expected 1, so consider 0 an error */
if (ret == 0)
ret = -EIO;
else if (ret == 1)
ret = 0;
return ret;
}
static int qual_power(struct hfi1_pportdata *ppd)
{
u32 cable_power_class = 0, power_class_max = 0;
u8 *cache = ppd->qsfp_info.cache;
int ret = 0;
ret = get_platform_config_field(
ppd->dd, PLATFORM_CONFIG_SYSTEM_TABLE, 0,
SYSTEM_TABLE_QSFP_POWER_CLASS_MAX, &power_class_max, 4);
if (ret)
return ret;
cable_power_class = get_qsfp_power_class(cache[QSFP_MOD_PWR_OFFS]);
if (cable_power_class > power_class_max)
ppd->offline_disabled_reason =
HFI1_ODR_MASK(OPA_LINKDOWN_REASON_POWER_POLICY);
if (ppd->offline_disabled_reason ==
HFI1_ODR_MASK(OPA_LINKDOWN_REASON_POWER_POLICY)) {
dd_dev_err(
ppd->dd,
"%s: Port disabled due to system power restrictions\n",
__func__);
ret = -EPERM;
}
return ret;
}
static int qual_bitrate(struct hfi1_pportdata *ppd)
{
u16 lss = ppd->link_speed_supported, lse = ppd->link_speed_enabled;
u8 *cache = ppd->qsfp_info.cache;
if ((lss & OPA_LINK_SPEED_25G) && (lse & OPA_LINK_SPEED_25G) &&
cache[QSFP_NOM_BIT_RATE_250_OFFS] < 0x64)
ppd->offline_disabled_reason =
HFI1_ODR_MASK(OPA_LINKDOWN_REASON_LINKSPEED_POLICY);
if ((lss & OPA_LINK_SPEED_12_5G) && (lse & OPA_LINK_SPEED_12_5G) &&
cache[QSFP_NOM_BIT_RATE_100_OFFS] < 0x7D)
ppd->offline_disabled_reason =
HFI1_ODR_MASK(OPA_LINKDOWN_REASON_LINKSPEED_POLICY);
if (ppd->offline_disabled_reason ==
HFI1_ODR_MASK(OPA_LINKDOWN_REASON_LINKSPEED_POLICY)) {
dd_dev_err(
ppd->dd,
"%s: Cable failed bitrate check, disabling port\n",
__func__);
return -EPERM;
}
return 0;
}
static int set_qsfp_high_power(struct hfi1_pportdata *ppd)
{
u8 cable_power_class = 0, power_ctrl_byte = 0;
u8 *cache = ppd->qsfp_info.cache;
int ret;
cable_power_class = get_qsfp_power_class(cache[QSFP_MOD_PWR_OFFS]);
if (cable_power_class > QSFP_POWER_CLASS_1) {
power_ctrl_byte = cache[QSFP_PWR_CTRL_BYTE_OFFS];
power_ctrl_byte |= 1;
power_ctrl_byte &= ~(0x2);
ret = qsfp_write(ppd, ppd->dd->hfi1_id,
QSFP_PWR_CTRL_BYTE_OFFS,
&power_ctrl_byte, 1);
if (ret != 1)
return -EIO;
if (cable_power_class > QSFP_POWER_CLASS_4) {
power_ctrl_byte |= (1 << 2);
ret = qsfp_write(ppd, ppd->dd->hfi1_id,
QSFP_PWR_CTRL_BYTE_OFFS,
&power_ctrl_byte, 1);
if (ret != 1)
return -EIO;
}
/* SFF 8679 rev 1.7 LPMode Deassert time */
msleep(300);
}
return 0;
}
static void apply_rx_cdr(struct hfi1_pportdata *ppd,
u32 rx_preset_index,
u8 *cdr_ctrl_byte)
{
u32 rx_preset;
u8 *cache = ppd->qsfp_info.cache;
int cable_power_class;
if (!((cache[QSFP_MOD_PWR_OFFS] & 0x4) &&
(cache[QSFP_CDR_INFO_OFFS] & 0x40)))
return;
/* RX CDR present, bypass supported */
cable_power_class = get_qsfp_power_class(cache[QSFP_MOD_PWR_OFFS]);
if (cable_power_class <= QSFP_POWER_CLASS_3) {
/* Power class <= 3, ignore config & turn RX CDR on */
*cdr_ctrl_byte |= 0xF;
return;
}
get_platform_config_field(
ppd->dd, PLATFORM_CONFIG_RX_PRESET_TABLE,
rx_preset_index, RX_PRESET_TABLE_QSFP_RX_CDR_APPLY,
&rx_preset, 4);
if (!rx_preset) {
dd_dev_info(
ppd->dd,
"%s: RX_CDR_APPLY is set to disabled\n",
__func__);
return;
}
get_platform_config_field(
ppd->dd, PLATFORM_CONFIG_RX_PRESET_TABLE,
rx_preset_index, RX_PRESET_TABLE_QSFP_RX_CDR,
&rx_preset, 4);
/* Expand cdr setting to all 4 lanes */
rx_preset = (rx_preset | (rx_preset << 1) |
(rx_preset << 2) | (rx_preset << 3));
if (rx_preset) {
*cdr_ctrl_byte |= rx_preset;
} else {
*cdr_ctrl_byte &= rx_preset;
/* Preserve current TX CDR status */
*cdr_ctrl_byte |= (cache[QSFP_CDR_CTRL_BYTE_OFFS] & 0xF0);
}
}
static void apply_tx_cdr(struct hfi1_pportdata *ppd,
u32 tx_preset_index,
u8 *cdr_ctrl_byte)
{
u32 tx_preset;
u8 *cache = ppd->qsfp_info.cache;
int cable_power_class;
if (!((cache[QSFP_MOD_PWR_OFFS] & 0x8) &&
(cache[QSFP_CDR_INFO_OFFS] & 0x80)))
return;
/* TX CDR present, bypass supported */
cable_power_class = get_qsfp_power_class(cache[QSFP_MOD_PWR_OFFS]);
if (cable_power_class <= QSFP_POWER_CLASS_3) {
/* Power class <= 3, ignore config & turn TX CDR on */
*cdr_ctrl_byte |= 0xF0;
return;
}
get_platform_config_field(
ppd->dd,
PLATFORM_CONFIG_TX_PRESET_TABLE, tx_preset_index,
TX_PRESET_TABLE_QSFP_TX_CDR_APPLY, &tx_preset, 4);
if (!tx_preset) {
dd_dev_info(
ppd->dd,
"%s: TX_CDR_APPLY is set to disabled\n",
__func__);
return;
}
get_platform_config_field(
ppd->dd,
PLATFORM_CONFIG_TX_PRESET_TABLE,
tx_preset_index,
TX_PRESET_TABLE_QSFP_TX_CDR, &tx_preset, 4);
/* Expand cdr setting to all 4 lanes */
tx_preset = (tx_preset | (tx_preset << 1) |
(tx_preset << 2) | (tx_preset << 3));
if (tx_preset)
*cdr_ctrl_byte |= (tx_preset << 4);
else
/* Preserve current/determined RX CDR status */
*cdr_ctrl_byte &= ((tx_preset << 4) | 0xF);
}
static void apply_cdr_settings(
struct hfi1_pportdata *ppd, u32 rx_preset_index,
u32 tx_preset_index)
{
u8 *cache = ppd->qsfp_info.cache;
u8 cdr_ctrl_byte = cache[QSFP_CDR_CTRL_BYTE_OFFS];
apply_rx_cdr(ppd, rx_preset_index, &cdr_ctrl_byte);
apply_tx_cdr(ppd, tx_preset_index, &cdr_ctrl_byte);
qsfp_write(ppd, ppd->dd->hfi1_id, QSFP_CDR_CTRL_BYTE_OFFS,
&cdr_ctrl_byte, 1);
}
static void apply_tx_eq_auto(struct hfi1_pportdata *ppd)
{
u8 *cache = ppd->qsfp_info.cache;
u8 tx_eq;
if (!(cache[QSFP_EQ_INFO_OFFS] & 0x8))
return;
/* Disable adaptive TX EQ if present */
tx_eq = cache[(128 * 3) + 241];
tx_eq &= 0xF0;
qsfp_write(ppd, ppd->dd->hfi1_id, (256 * 3) + 241, &tx_eq, 1);
}
static void apply_tx_eq_prog(struct hfi1_pportdata *ppd, u32 tx_preset_index)
{
u8 *cache = ppd->qsfp_info.cache;
u32 tx_preset;
u8 tx_eq;
if (!(cache[QSFP_EQ_INFO_OFFS] & 0x4))
return;
get_platform_config_field(
ppd->dd, PLATFORM_CONFIG_TX_PRESET_TABLE,
tx_preset_index, TX_PRESET_TABLE_QSFP_TX_EQ_APPLY,
&tx_preset, 4);
if (!tx_preset) {
dd_dev_info(
ppd->dd,
"%s: TX_EQ_APPLY is set to disabled\n",
__func__);
return;
}
get_platform_config_field(
ppd->dd, PLATFORM_CONFIG_TX_PRESET_TABLE,
tx_preset_index, TX_PRESET_TABLE_QSFP_TX_EQ,
&tx_preset, 4);
if (((cache[(128 * 3) + 224] & 0xF0) >> 4) < tx_preset) {
dd_dev_info(
ppd->dd,
"%s: TX EQ %x unsupported\n",
__func__, tx_preset);
dd_dev_info(
ppd->dd,
"%s: Applying EQ %x\n",
__func__, cache[608] & 0xF0);
tx_preset = (cache[608] & 0xF0) >> 4;
}
tx_eq = tx_preset | (tx_preset << 4);
qsfp_write(ppd, ppd->dd->hfi1_id, (256 * 3) + 234, &tx_eq, 1);
qsfp_write(ppd, ppd->dd->hfi1_id, (256 * 3) + 235, &tx_eq, 1);
}
static void apply_rx_eq_emp(struct hfi1_pportdata *ppd, u32 rx_preset_index)
{
u32 rx_preset;
u8 rx_eq, *cache = ppd->qsfp_info.cache;
if (!(cache[QSFP_EQ_INFO_OFFS] & 0x2))
return;
get_platform_config_field(
ppd->dd, PLATFORM_CONFIG_RX_PRESET_TABLE,
rx_preset_index, RX_PRESET_TABLE_QSFP_RX_EMP_APPLY,
&rx_preset, 4);
if (!rx_preset) {
dd_dev_info(
ppd->dd,
"%s: RX_EMP_APPLY is set to disabled\n",
__func__);
return;
}
get_platform_config_field(
ppd->dd, PLATFORM_CONFIG_RX_PRESET_TABLE,
rx_preset_index, RX_PRESET_TABLE_QSFP_RX_EMP,
&rx_preset, 4);
if ((cache[(128 * 3) + 224] & 0xF) < rx_preset) {
dd_dev_info(
ppd->dd,
"%s: Requested RX EMP %x\n",
__func__, rx_preset);
dd_dev_info(
ppd->dd,
"%s: Applying supported EMP %x\n",
__func__, cache[608] & 0xF);
rx_preset = cache[608] & 0xF;
}
rx_eq = rx_preset | (rx_preset << 4);
qsfp_write(ppd, ppd->dd->hfi1_id, (256 * 3) + 236, &rx_eq, 1);
qsfp_write(ppd, ppd->dd->hfi1_id, (256 * 3) + 237, &rx_eq, 1);
}
static void apply_eq_settings(struct hfi1_pportdata *ppd,
u32 rx_preset_index, u32 tx_preset_index)
{
u8 *cache = ppd->qsfp_info.cache;
/* no point going on w/o a page 3 */
if (cache[2] & 4) {
dd_dev_info(ppd->dd,
"%s: Upper page 03 not present\n",
__func__);
return;
}
apply_tx_eq_auto(ppd);
apply_tx_eq_prog(ppd, tx_preset_index);
apply_rx_eq_emp(ppd, rx_preset_index);
}
static void apply_rx_amplitude_settings(
struct hfi1_pportdata *ppd, u32 rx_preset_index,
u32 tx_preset_index)
{
u32 rx_preset;
u8 rx_amp = 0, i = 0, preferred = 0, *cache = ppd->qsfp_info.cache;
/* no point going on w/o a page 3 */
if (cache[2] & 4) {
dd_dev_info(ppd->dd,
"%s: Upper page 03 not present\n",
__func__);
return;
}
if (!(cache[QSFP_EQ_INFO_OFFS] & 0x1)) {
dd_dev_info(ppd->dd,
"%s: RX_AMP_APPLY is set to disabled\n",
__func__);
return;
}
get_platform_config_field(ppd->dd,
PLATFORM_CONFIG_RX_PRESET_TABLE,
rx_preset_index,
RX_PRESET_TABLE_QSFP_RX_AMP_APPLY,
&rx_preset, 4);
if (!rx_preset) {
dd_dev_info(ppd->dd,
"%s: RX_AMP_APPLY is set to disabled\n",
__func__);
return;
}
get_platform_config_field(ppd->dd,
PLATFORM_CONFIG_RX_PRESET_TABLE,
rx_preset_index,
RX_PRESET_TABLE_QSFP_RX_AMP,
&rx_preset, 4);
dd_dev_info(ppd->dd,
"%s: Requested RX AMP %x\n",
__func__,
rx_preset);
for (i = 0; i < 4; i++) {
if (cache[(128 * 3) + 225] & (1 << i)) {
preferred = i;
if (preferred == rx_preset)
break;
}
}
/*
* Verify that preferred RX amplitude is not just a
* fall through of the default
*/
if (!preferred && !(cache[(128 * 3) + 225] & 0x1)) {
dd_dev_info(ppd->dd, "No supported RX AMP, not applying\n");
return;
}
dd_dev_info(ppd->dd,
"%s: Applying RX AMP %x\n", __func__, preferred);
rx_amp = preferred | (preferred << 4);
qsfp_write(ppd, ppd->dd->hfi1_id, (256 * 3) + 238, &rx_amp, 1);
qsfp_write(ppd, ppd->dd->hfi1_id, (256 * 3) + 239, &rx_amp, 1);
}
#define OPA_INVALID_INDEX 0xFFF
static void apply_tx_lanes(struct hfi1_pportdata *ppd, u8 field_id,
u32 config_data, const char *message)
{
u8 i;
int ret;
for (i = 0; i < 4; i++) {
ret = load_8051_config(ppd->dd, field_id, i, config_data);
if (ret != HCMD_SUCCESS) {
dd_dev_err(
ppd->dd,
"%s: %s for lane %u failed\n",
message, __func__, i);
}
}
}
/*
* Return a special SerDes setting for low power AOC cables. The power class
* threshold and setting being used were all found by empirical testing.
*
* Summary of the logic:
*
* if (QSFP and QSFP_TYPE == AOC and QSFP_POWER_CLASS < 4)
* return 0xe
* return 0; // leave at default
*/
static u8 aoc_low_power_setting(struct hfi1_pportdata *ppd)
{
u8 *cache = ppd->qsfp_info.cache;
int power_class;
/* QSFP only */
if (ppd->port_type != PORT_TYPE_QSFP)
return 0; /* leave at default */
/* active optical cables only */
switch ((cache[QSFP_MOD_TECH_OFFS] & 0xF0) >> 4) {
case 0x0 ... 0x9: fallthrough;
case 0xC: fallthrough;
case 0xE:
/* active AOC */
power_class = get_qsfp_power_class(cache[QSFP_MOD_PWR_OFFS]);
if (power_class < QSFP_POWER_CLASS_4)
return 0xe;
}
return 0; /* leave at default */
}
static void apply_tunings(
struct hfi1_pportdata *ppd, u32 tx_preset_index,
u8 tuning_method, u32 total_atten, u8 limiting_active)
{
int ret = 0;
u32 config_data = 0, tx_preset = 0;
u8 precur = 0, attn = 0, postcur = 0, external_device_config = 0;
u8 *cache = ppd->qsfp_info.cache;
/* Pass tuning method to 8051 */
read_8051_config(ppd->dd, LINK_TUNING_PARAMETERS, GENERAL_CONFIG,
&config_data);
config_data &= ~(0xff << TUNING_METHOD_SHIFT);
config_data |= ((u32)tuning_method << TUNING_METHOD_SHIFT);
ret = load_8051_config(ppd->dd, LINK_TUNING_PARAMETERS, GENERAL_CONFIG,
config_data);
if (ret != HCMD_SUCCESS)
dd_dev_err(ppd->dd, "%s: Failed to set tuning method\n",
__func__);
/* Set same channel loss for both TX and RX */
config_data = 0 | (total_atten << 16) | (total_atten << 24);
apply_tx_lanes(ppd, CHANNEL_LOSS_SETTINGS, config_data,
"Setting channel loss");
/* Inform 8051 of cable capabilities */
if (ppd->qsfp_info.cache_valid) {
external_device_config =
((cache[QSFP_MOD_PWR_OFFS] & 0x4) << 3) |
((cache[QSFP_MOD_PWR_OFFS] & 0x8) << 2) |
((cache[QSFP_EQ_INFO_OFFS] & 0x2) << 1) |
(cache[QSFP_EQ_INFO_OFFS] & 0x4);
ret = read_8051_config(ppd->dd, DC_HOST_COMM_SETTINGS,
GENERAL_CONFIG, &config_data);
/* Clear, then set the external device config field */
config_data &= ~(u32)0xFF;
config_data |= external_device_config;
ret = load_8051_config(ppd->dd, DC_HOST_COMM_SETTINGS,
GENERAL_CONFIG, config_data);
if (ret != HCMD_SUCCESS)
dd_dev_err(ppd->dd,
"%s: Failed set ext device config params\n",
__func__);
}
if (tx_preset_index == OPA_INVALID_INDEX) {
if (ppd->port_type == PORT_TYPE_QSFP && limiting_active)
dd_dev_err(ppd->dd, "%s: Invalid Tx preset index\n",
__func__);
return;
}
/* Following for limiting active channels only */
get_platform_config_field(
ppd->dd, PLATFORM_CONFIG_TX_PRESET_TABLE, tx_preset_index,
TX_PRESET_TABLE_PRECUR, &tx_preset, 4);
precur = tx_preset;
get_platform_config_field(
ppd->dd, PLATFORM_CONFIG_TX_PRESET_TABLE,
tx_preset_index, TX_PRESET_TABLE_ATTN, &tx_preset, 4);
attn = tx_preset;
get_platform_config_field(
ppd->dd, PLATFORM_CONFIG_TX_PRESET_TABLE,
tx_preset_index, TX_PRESET_TABLE_POSTCUR, &tx_preset, 4);
postcur = tx_preset;
/*
* NOTES:
* o The aoc_low_power_setting is applied to all lanes even
* though only lane 0's value is examined by the firmware.
* o A lingering low power setting after a cable swap does
* not occur. On cable unplug the 8051 is reset and
* restarted on cable insert. This resets all settings to
* their default, erasing any previous low power setting.
*/
config_data = precur | (attn << 8) | (postcur << 16) |
(aoc_low_power_setting(ppd) << 24);
apply_tx_lanes(ppd, TX_EQ_SETTINGS, config_data,
"Applying TX settings");
}
/* Must be holding the QSFP i2c resource */
static int tune_active_qsfp(struct hfi1_pportdata *ppd, u32 *ptr_tx_preset,
u32 *ptr_rx_preset, u32 *ptr_total_atten)
{
int ret;
u16 lss = ppd->link_speed_supported, lse = ppd->link_speed_enabled;
u8 *cache = ppd->qsfp_info.cache;
ppd->qsfp_info.limiting_active = 1;
ret = set_qsfp_tx(ppd, 0);
if (ret)
return ret;
ret = qual_power(ppd);
if (ret)
return ret;
ret = qual_bitrate(ppd);
if (ret)
return ret;
/*
* We'll change the QSFP memory contents from here on out, thus we set a
* flag here to remind ourselves to reset the QSFP module. This prevents
* reuse of stale settings established in our previous pass through.
*/
if (ppd->qsfp_info.reset_needed) {
ret = reset_qsfp(ppd);
if (ret)
return ret;
refresh_qsfp_cache(ppd, &ppd->qsfp_info);
} else {
ppd->qsfp_info.reset_needed = 1;
}
ret = set_qsfp_high_power(ppd);
if (ret)
return ret;
if (cache[QSFP_EQ_INFO_OFFS] & 0x4) {
ret = get_platform_config_field(
ppd->dd,
PLATFORM_CONFIG_PORT_TABLE, 0,
PORT_TABLE_TX_PRESET_IDX_ACTIVE_EQ,
ptr_tx_preset, 4);
if (ret) {
*ptr_tx_preset = OPA_INVALID_INDEX;
return ret;
}
} else {
ret = get_platform_config_field(
ppd->dd,
PLATFORM_CONFIG_PORT_TABLE, 0,
PORT_TABLE_TX_PRESET_IDX_ACTIVE_NO_EQ,
ptr_tx_preset, 4);
if (ret) {
*ptr_tx_preset = OPA_INVALID_INDEX;
return ret;
}
}
ret = get_platform_config_field(
ppd->dd, PLATFORM_CONFIG_PORT_TABLE, 0,
PORT_TABLE_RX_PRESET_IDX, ptr_rx_preset, 4);
if (ret) {
*ptr_rx_preset = OPA_INVALID_INDEX;
return ret;
}
if ((lss & OPA_LINK_SPEED_25G) && (lse & OPA_LINK_SPEED_25G))
get_platform_config_field(
ppd->dd, PLATFORM_CONFIG_PORT_TABLE, 0,
PORT_TABLE_LOCAL_ATTEN_25G, ptr_total_atten, 4);
else if ((lss & OPA_LINK_SPEED_12_5G) && (lse & OPA_LINK_SPEED_12_5G))
get_platform_config_field(
ppd->dd, PLATFORM_CONFIG_PORT_TABLE, 0,
PORT_TABLE_LOCAL_ATTEN_12G, ptr_total_atten, 4);
apply_cdr_settings(ppd, *ptr_rx_preset, *ptr_tx_preset);
apply_eq_settings(ppd, *ptr_rx_preset, *ptr_tx_preset);
apply_rx_amplitude_settings(ppd, *ptr_rx_preset, *ptr_tx_preset);
ret = set_qsfp_tx(ppd, 1);
return ret;
}
static int tune_qsfp(struct hfi1_pportdata *ppd,
u32 *ptr_tx_preset, u32 *ptr_rx_preset,
u8 *ptr_tuning_method, u32 *ptr_total_atten)
{
u32 cable_atten = 0, remote_atten = 0, platform_atten = 0;
u16 lss = ppd->link_speed_supported, lse = ppd->link_speed_enabled;
int ret = 0;
u8 *cache = ppd->qsfp_info.cache;
switch ((cache[QSFP_MOD_TECH_OFFS] & 0xF0) >> 4) {
case 0xA ... 0xB:
ret = get_platform_config_field(
ppd->dd,
PLATFORM_CONFIG_PORT_TABLE, 0,
PORT_TABLE_LOCAL_ATTEN_25G,
&platform_atten, 4);
if (ret)
return ret;
if ((lss & OPA_LINK_SPEED_25G) && (lse & OPA_LINK_SPEED_25G))
cable_atten = cache[QSFP_CU_ATTEN_12G_OFFS];
else if ((lss & OPA_LINK_SPEED_12_5G) &&
(lse & OPA_LINK_SPEED_12_5G))
cable_atten = cache[QSFP_CU_ATTEN_7G_OFFS];
/* Fallback to configured attenuation if cable memory is bad */
if (cable_atten == 0 || cable_atten > 36) {
ret = get_platform_config_field(
ppd->dd,
PLATFORM_CONFIG_SYSTEM_TABLE, 0,
SYSTEM_TABLE_QSFP_ATTENUATION_DEFAULT_25G,
&cable_atten, 4);
if (ret)
return ret;
}
ret = get_platform_config_field(
ppd->dd, PLATFORM_CONFIG_PORT_TABLE, 0,
PORT_TABLE_REMOTE_ATTEN_25G, &remote_atten, 4);
if (ret)
return ret;
*ptr_total_atten = platform_atten + cable_atten + remote_atten;
*ptr_tuning_method = OPA_PASSIVE_TUNING;
break;
case 0x0 ... 0x9: fallthrough;
case 0xC: fallthrough;
case 0xE:
ret = tune_active_qsfp(ppd, ptr_tx_preset, ptr_rx_preset,
ptr_total_atten);
if (ret)
return ret;
*ptr_tuning_method = OPA_ACTIVE_TUNING;
break;
case 0xD: fallthrough;
case 0xF:
default:
dd_dev_warn(ppd->dd, "%s: Unknown/unsupported cable\n",
__func__);
break;
}
return ret;
}
/*
* This function communicates its success or failure via ppd->driver_link_ready
* Thus, it depends on its association with start_link(...) which checks
* driver_link_ready before proceeding with the link negotiation and
* initialization process.
*/
void tune_serdes(struct hfi1_pportdata *ppd)
{
int ret = 0;
u32 total_atten = 0;
u32 remote_atten = 0, platform_atten = 0;
u32 rx_preset_index, tx_preset_index;
u8 tuning_method = 0, limiting_active = 0;
struct hfi1_devdata *dd = ppd->dd;
rx_preset_index = OPA_INVALID_INDEX;
tx_preset_index = OPA_INVALID_INDEX;
/* the link defaults to enabled */
ppd->link_enabled = 1;
/* the driver link ready state defaults to not ready */
ppd->driver_link_ready = 0;
ppd->offline_disabled_reason = HFI1_ODR_MASK(OPA_LINKDOWN_REASON_NONE);
/* Skip the tuning for testing (loopback != none) and simulations */
if (loopback != LOOPBACK_NONE ||
ppd->dd->icode == ICODE_FUNCTIONAL_SIMULATOR) {
ppd->driver_link_ready = 1;
if (qsfp_mod_present(ppd)) {
ret = acquire_chip_resource(ppd->dd,
qsfp_resource(ppd->dd),
QSFP_WAIT);
if (ret) {
dd_dev_err(ppd->dd, "%s: hfi%d: cannot lock i2c chain\n",
__func__, (int)ppd->dd->hfi1_id);
goto bail;
}
refresh_qsfp_cache(ppd, &ppd->qsfp_info);
release_chip_resource(ppd->dd, qsfp_resource(ppd->dd));
}
return;
}
switch (ppd->port_type) {
case PORT_TYPE_DISCONNECTED:
ppd->offline_disabled_reason =
HFI1_ODR_MASK(OPA_LINKDOWN_REASON_DISCONNECTED);
dd_dev_warn(dd, "%s: Port disconnected, disabling port\n",
__func__);
goto bail;
case PORT_TYPE_FIXED:
/* platform_atten, remote_atten pre-zeroed to catch error */
get_platform_config_field(
ppd->dd, PLATFORM_CONFIG_PORT_TABLE, 0,
PORT_TABLE_LOCAL_ATTEN_25G, &platform_atten, 4);
get_platform_config_field(
ppd->dd, PLATFORM_CONFIG_PORT_TABLE, 0,
PORT_TABLE_REMOTE_ATTEN_25G, &remote_atten, 4);
total_atten = platform_atten + remote_atten;
tuning_method = OPA_PASSIVE_TUNING;
break;
case PORT_TYPE_VARIABLE:
if (qsfp_mod_present(ppd)) {
/*
* platform_atten, remote_atten pre-zeroed to
* catch error
*/
get_platform_config_field(
ppd->dd, PLATFORM_CONFIG_PORT_TABLE, 0,
PORT_TABLE_LOCAL_ATTEN_25G,
&platform_atten, 4);
get_platform_config_field(
ppd->dd, PLATFORM_CONFIG_PORT_TABLE, 0,
PORT_TABLE_REMOTE_ATTEN_25G,
&remote_atten, 4);
total_atten = platform_atten + remote_atten;
tuning_method = OPA_PASSIVE_TUNING;
} else {
ppd->offline_disabled_reason =
HFI1_ODR_MASK(OPA_LINKDOWN_REASON_CHASSIS_CONFIG);
goto bail;
}
break;
case PORT_TYPE_QSFP:
if (qsfp_mod_present(ppd)) {
ret = acquire_chip_resource(ppd->dd,
qsfp_resource(ppd->dd),
QSFP_WAIT);
if (ret) {
dd_dev_err(ppd->dd, "%s: hfi%d: cannot lock i2c chain\n",
__func__, (int)ppd->dd->hfi1_id);
goto bail;
}
refresh_qsfp_cache(ppd, &ppd->qsfp_info);
if (ppd->qsfp_info.cache_valid) {
ret = tune_qsfp(ppd,
&tx_preset_index,
&rx_preset_index,
&tuning_method,
&total_atten);
/*
* We may have modified the QSFP memory, so
* update the cache to reflect the changes
*/
refresh_qsfp_cache(ppd, &ppd->qsfp_info);
limiting_active =
ppd->qsfp_info.limiting_active;
} else {
dd_dev_err(dd,
"%s: Reading QSFP memory failed\n",
__func__);
ret = -EINVAL; /* a fail indication */
}
release_chip_resource(ppd->dd, qsfp_resource(ppd->dd));
if (ret)
goto bail;
} else {
ppd->offline_disabled_reason =
HFI1_ODR_MASK(
OPA_LINKDOWN_REASON_LOCAL_MEDIA_NOT_INSTALLED);
goto bail;
}
break;
default:
dd_dev_warn(ppd->dd, "%s: Unknown port type\n", __func__);
ppd->port_type = PORT_TYPE_UNKNOWN;
tuning_method = OPA_UNKNOWN_TUNING;
total_atten = 0;
limiting_active = 0;
tx_preset_index = OPA_INVALID_INDEX;
break;
}
if (ppd->offline_disabled_reason ==
HFI1_ODR_MASK(OPA_LINKDOWN_REASON_NONE))
apply_tunings(ppd, tx_preset_index, tuning_method,
total_atten, limiting_active);
if (!ret)
ppd->driver_link_ready = 1;
return;
bail:
ppd->driver_link_ready = 0;
}
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