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crypto: qat - fix firmware loading failure for GEN6 devices

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QAT GEN6 hardware requires a minimum 3 us delay during the acceleration
engine reset sequence to ensure the hardware fully settles.
Without this delay, the firmware load may fail intermittently.

Add a delay after placing the AE into reset and before clearing the reset,
matching the hardware requirements and ensuring stable firmware loading.
Earlier generations remain unaffected.

Fixes: 17fd7514ae ("crypto: qat - add qat_6xxx driver")
Signed-off-by: Suman Kumar Chakraborty <suman.kumar.chakraborty@intel.com>
Cc: stable@vger.kernel.org
Reviewed-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Suman Kumar Chakraborty
2026-03-05 08:58:59 +00:00
committed by Herbert Xu
parent 4963b39e3a
commit e7dcb722bb
3 changed files with 12 additions and 1 deletions
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7
drivers/crypto/intel/qat/qat_common/adf_accel_engine.c
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@@ -1,5 +1,6 @@
// SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only)
/* Copyright(c) 2014 - 2020 Intel Corporation */
#include <linux/delay.h>
#include <linux/firmware.h>
#include <linux/pci.h>
#include "adf_cfg.h"
@@ -162,8 +163,14 @@ int adf_ae_stop(struct adf_accel_dev *accel_dev)
static int adf_ae_reset(struct adf_accel_dev *accel_dev, int ae)
{
struct adf_fw_loader_data *loader_data = accel_dev->fw_loader;
unsigned long reset_delay;
qat_hal_reset(loader_data->fw_loader);
reset_delay = loader_data->fw_loader->chip_info->reset_delay_us;
if (reset_delay)
fsleep(reset_delay);
if (qat_hal_clr_reset(loader_data->fw_loader))
return -EFAULT;