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crypto: qat - add support for device telemetry

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Expose through debugfs device telemetry data for QAT GEN4 devices.

This allows to gather metrics about the performance and the utilization
of a device. In particular, statistics on (1) the utilization of the
PCIe channel, (2) address translation, when SVA is enabled and (3) the
internal engines for crypto and data compression.

If telemetry is supported by the firmware, the driver allocates a DMA
region and a circular buffer. When telemetry is enabled, through the
`control` attribute in debugfs, the driver sends to the firmware, via
the admin interface, the `TL_START` command. This triggers the device to
periodically gather telemetry data from hardware registers and write it
into the DMA memory region. The device writes into the shared region
every second.

The driver, every 500ms, snapshots the DMA shared region into the
circular buffer. This is then used to compute basic metric
(min/max/average) on each counter, every time the `device_data` attribute
is queried.

Telemetry counters are exposed through debugfs in the folder
/sys/kernel/debug/qat_<device>_<BDF>/telemetry.

For details, refer to debugfs-driver-qat_telemetry in Documentation/ABI.

This patch is based on earlier work done by Wojciech Ziemba.

Signed-off-by: Lucas Segarra Fernandez <lucas.segarra.fernandez@intel.com>
Reviewed-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Reviewed-by: Damian Muszynski <damian.muszynski@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Lucas Segarra Fernandez
2023-12-22 11:35:07 +01:00
committed by Herbert Xu
parent 7f06679dd5
commit 69e7649f7c
13 changed files with 1339 additions and 0 deletions
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4
drivers/crypto/intel/qat/qat_common/adf_accel_devices.h
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@@ -11,6 +11,7 @@
#include <linux/types.h>
#include "adf_cfg_common.h"
#include "adf_rl.h"
#include "adf_telemetry.h"
#include "adf_pfvf_msg.h"
#define ADF_DH895XCC_DEVICE_NAME "dh895xcc"
@@ -254,6 +255,7 @@ struct adf_hw_device_data {
struct adf_ras_ops ras_ops;
struct adf_dev_err_mask dev_err_mask;
struct adf_rl_hw_data rl_data;
struct adf_tl_hw_data tl_data;
const char *fw_name;
const char *fw_mmp_name;
u32 fuses;
@@ -308,6 +310,7 @@ struct adf_hw_device_data {
#define GET_CSR_OPS(accel_dev) (&(accel_dev)->hw_device->csr_ops)
#define GET_PFVF_OPS(accel_dev) (&(accel_dev)->hw_device->pfvf_ops)
#define GET_DC_OPS(accel_dev) (&(accel_dev)->hw_device->dc_ops)
#define GET_TL_DATA(accel_dev) GET_HW_DATA(accel_dev)->tl_data
#define accel_to_pci_dev(accel_ptr) accel_ptr->accel_pci_dev.pci_dev
struct adf_admin_comms;
@@ -356,6 +359,7 @@ struct adf_accel_dev {
struct adf_cfg_device_data *cfg;
struct adf_fw_loader_data *fw_loader;
struct adf_admin_comms *admin;
struct adf_telemetry *telemetry;
struct adf_dc_data *dc_data;
struct adf_pm power_management;
struct list_head crypto_list;