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qcacmn: Add WAR to consistently read mgmt Rx REO snapshots

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Read the management Rx reorder snapshots back to back to get a
consistent value.

CRs-Fixed: 3181479
Change-Id: I5ff73db5d4be362d7449494f3630a11da0456f0e
This commit is contained in:
Edayilliam Jayadev 2022-04-27 16:22:13 +05:30 committed by Madan Koyyalamudi
parent a9b55f2c20
commit ff6d633d72
2 changed files with 74 additions and 7 deletions
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4
target_if/mgmt_txrx/inc/target_if_mgmt_txrx_rx_reo.h
View File

@ -1,5 +1,6 @@
/*
* Copyright (c) 2021, The Linux Foundation. All rights reserved.
* Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
@ -32,7 +33,8 @@
#ifdef WLAN_MGMT_RX_REO_SUPPORT
#define MGMT_RX_REO_SNAPSHOT_READ_RETRY_LIMIT (5)
#define MGMT_RX_REO_SNAPSHOT_B2B_READ_SWAR_RETRY_LIMIT (4)
#define MGMT_RX_REO_SNAPSHOT_READ_RETRY_LIMIT (5)
/**
* target_if_get_mgmt_rx_reo_low_level_ops() - Get low-level ops of management

77
target_if/mgmt_txrx/src/target_if_mgmt_txrx_rx_reo.c
View File

@ -224,6 +224,64 @@ target_if_mgmt_rx_reo_get_valid_hw_link_bitmap(struct wlan_objmgr_psoc *psoc,
return QDF_STATUS_SUCCESS;
}
/**
* target_if_mgmt_rx_reo_read_snapshot_raw() - Read raw value of management
* rx-reorder snapshot
* @snapshot_address: snapshot address
* @mgmt_rx_reo_snapshot_low: Pointer to lower 32 bits of snapshot value
* @mgmt_rx_reo_snapshot_high: Pointer to higher 32 bits of snapshot value
* @snapshot_version: snapshot version
*
* Read raw value of management rx-reorder snapshots.
*
* Return: QDF_STATUS
*/
static QDF_STATUS
target_if_mgmt_rx_reo_read_snapshot_raw
(struct mgmt_rx_reo_shared_snapshot *snapshot_address,
uint32_t *mgmt_rx_reo_snapshot_low,
uint32_t *mgmt_rx_reo_snapshot_high,
uint8_t snapshot_version)
{
uint32_t prev_snapshot_low;
uint32_t prev_snapshot_high;
uint32_t cur_snapshot_low;
uint32_t cur_snapshot_high;
uint8_t retry_count = 0;
if (snapshot_version == 1) {
*mgmt_rx_reo_snapshot_low =
snapshot_address->mgmt_rx_reo_snapshot_low;
*mgmt_rx_reo_snapshot_high =
snapshot_address->mgmt_rx_reo_snapshot_high;
return QDF_STATUS_SUCCESS;
}
prev_snapshot_low = snapshot_address->mgmt_rx_reo_snapshot_low;
prev_snapshot_high = snapshot_address->mgmt_rx_reo_snapshot_high;
for (; retry_count < MGMT_RX_REO_SNAPSHOT_B2B_READ_SWAR_RETRY_LIMIT;
retry_count++) {
cur_snapshot_low = snapshot_address->mgmt_rx_reo_snapshot_low;
cur_snapshot_high = snapshot_address->mgmt_rx_reo_snapshot_high;
if (prev_snapshot_low == cur_snapshot_low &&
prev_snapshot_high == cur_snapshot_high)
break;
prev_snapshot_low = cur_snapshot_low;
prev_snapshot_high = cur_snapshot_high;
}
qdf_assert_always(retry_count !=
MGMT_RX_REO_SNAPSHOT_B2B_READ_SWAR_RETRY_LIMIT);
*mgmt_rx_reo_snapshot_low = cur_snapshot_low;
*mgmt_rx_reo_snapshot_high = cur_snapshot_high;
return QDF_STATUS_SUCCESS;
}
/**
* target_if_mgmt_rx_reo_read_snapshot() - Read management rx-reorder snapshot
* @pdev: pdev pointer
@ -291,10 +349,17 @@ target_if_mgmt_rx_reo_read_snapshot(
retry_count = 0;
for (; retry_count < MGMT_RX_REO_SNAPSHOT_READ_RETRY_LIMIT;
retry_count++) {
mgmt_rx_reo_snapshot_low =
snapshot_address->mgmt_rx_reo_snapshot_low;
mgmt_rx_reo_snapshot_high =
snapshot_address->mgmt_rx_reo_snapshot_high;
status = target_if_mgmt_rx_reo_read_snapshot_raw
(snapshot_address,
&mgmt_rx_reo_snapshot_low,
&mgmt_rx_reo_snapshot_high,
snapshot_version);
if (QDF_IS_STATUS_ERROR(status)) {
mgmt_rx_reo_err("Failed to read snapshot %d",
id);
return QDF_STATUS_E_FAILURE;
}
snapshot_valid = low_level_ops->snapshot_is_valid(
mgmt_rx_reo_snapshot_low,
@ -331,8 +396,8 @@ target_if_mgmt_rx_reo_read_snapshot(
}
if (retry_count == MGMT_RX_REO_SNAPSHOT_READ_RETRY_LIMIT) {
mgmt_rx_reo_alert("Read retry limit, id = %d, ver = %u",
id, snapshot_version);
mgmt_rx_reo_err("Read retry limit, id = %d, ver = %u",
id, snapshot_version);
snapshot_value->valid = false;
snapshot_value->mgmt_pkt_ctr = 0xFFFF;
snapshot_value->global_timestamp = 0xFFFFFFFF;