[PATCH 06/15] net: hbl_cn: debugfs support

Omer Shpigelman
2024-06-13T08:22:41Z

Add debugfs files for advanced settings, debug options and testing.

Signed-off-by: Omer Shpigelman <oshpigelman@habana.ai>
Co-developed-by: Abhilash K V <kvabhilash@habana.ai>
Signed-off-by: Abhilash K V <kvabhilash@habana.ai>
Co-developed-by: Andrey Agranovich <aagranovich@habana.ai>
Signed-off-by: Andrey Agranovich <aagranovich@habana.ai>
Co-developed-by: Bharat Jauhari <bjauhari@habana.ai>
Signed-off-by: Bharat Jauhari <bjauhari@habana.ai>
Co-developed-by: David Meriin <dmeriin@habana.ai>
Signed-off-by: David Meriin <dmeriin@habana.ai>
Co-developed-by: Sagiv Ozeri <sozeri@habana.ai>
Signed-off-by: Sagiv Ozeri <sozeri@habana.ai>
Co-developed-by: Zvika Yehudai <zyehudai@habana.ai>
Signed-off-by: Zvika Yehudai <zyehudai@habana.ai>
---
.../ABI/testing/debugfs-driver-habanalabs_cn | 195 +++
MAINTAINERS | 1 +
drivers/net/ethernet/intel/hbl_cn/Makefile | 2 +
.../net/ethernet/intel/hbl_cn/common/hbl_cn.c | 4 +
.../net/ethernet/intel/hbl_cn/common/hbl_cn.h | 37 +
.../intel/hbl_cn/common/hbl_cn_debugfs.c | 1457 +++++++++++++++++
.../ethernet/intel/hbl_cn/common/hbl_cn_drv.c | 19 +-
7 files changed, 1714 insertions(+), 1 deletion(-)
create mode 100644 Documentation/ABI/testing/debugfs-driver-habanalabs_cn
create mode 100644 drivers/net/ethernet/intel/hbl_cn/common/hbl_cn_debugfs.c

diff --git a/Documentation/ABI/testing/debugfs-driver-habanalabs_cn b/Documentation/ABI/testing/debugfs-driver-habanalabs_cn
new file mode 100644
index 000000000000..5de689b0986d
--- /dev/null
+++ b/Documentation/ABI/testing/debugfs-driver-habanalabs_cn
@@ -0,0 +1,195 @@
+What: /sys/kernel/debug/habanalabs_cn/hbl_cn<n>/nic_accumulate_fec_duration
+Date: May 2024
+KernelVersion: N/A
+Contact: kvabhilash@habana.ai
+Description: Time (in ms) to accumulate FEC errors for. This is used as
+ divisor in calculation of pre & post FEC (Forward Error
+ Correction) SER (Symbol Error Rate).
+ Valid values are from 1 to ACCUMULATE_FEC_STATS_DURATION_MS_MAX.
+ Default value is ACCUMULATE_FEC_STATS_DURATION_MS.
+ Usage: echo <time_ms> > nic_accumulate_fec_duration
+ cat nic_accumulate_fec_duration
+
+What: /sys/kernel/debug/habanalabs_cn/hbl_cn<n>/nic_disable_decap
+Date: May 2024
+KernelVersion: 6.9
+Contact: gkgurumurthy@habana.ai
+Description: Allows the root user to enable/disable the decapsulation logic
+ on the RX path.
+ '1' disables the logic, '0' enables the logic.
+ The typical use case is to disable the decap on rx with encap
+ enabled on the tx, and run the RDMA traffic. This causes the
+ packets to be forwarded to ethernet ring which is ultimately
+ sent to linux kernel. The user can analyze the RDMA packet using
+ tcpdump and validate the encapsulation header.
+
+What: /sys/kernel/debug/habanalabs_cn/hbl_cn<n>/nic_inject_rx_err
+Date: May 2024
+KernelVersion: 6.9
+Contact: akishore@habana.ai
+Description: Allows the root user to force RX packet drop.
+ Usage: echo <drop_percent> > nic_inject_rx_err
+ cat nic_inject_rx_err
+
+What: /sys/kernel/debug/habanalabs_cn/hbl_cn<n>/nic_mac_lane_remap
+Date: May 2024
+KernelVersion: 6.9
+Contact: akishore@habana.ai
+Description: Allows root user to change MAC to PHY lane mapping. User should
+ provide space separated bitmap for all lanes on all NIC macros.
+ Usage: echo macro0 macro1 macro2 ... macroX > nic_mac_lane_remap
+
+What: /sys/kernel/debug/habanalabs_cn/hbl_cn<n>/nic_mac_loopback
+Date: May 2024
+KernelVersion: 6.9
+Contact: oshpigelman@habana.ai
+Description: Allows the root user to disable/enable MAC loopback for each NIC
+ port. The ports will function as if a physical loopback
+ transceiver was connected. A bitmask should be provided where
+ each bit represents a port.
+
+What: /sys/kernel/debug/habanalabs_cn/hbl_cn<n>/nic_mmu_bypass
+Date: May 2024
+KernelVersion: 6.9
+Contact: zyehudai@habana.ai
+Description: Sets the NIC to use MMU bypass for its allocated data structure.
+ Value of "0" is for disable, otherwise enable.
+
+What: /sys/kernel/debug/habanalabs_cn/hbl_cn<n>/nic_nrz_tx_taps
+Date: May 2024
+KernelVersion: 6.9
+Contact: sozeri@habana.ai
+Description: Allows the root user to set and show the NRZ Tx taps for the
+ port lanes. The lanes indices are 0-47.
+ Acceptable input string form:
+ <lane> <tx_pre2> <tx_pre1> <tx_main> <tx_post1> <tx_post2>.
+ cat nic_nrz_tx_taps will dump all taps.
+
+What: /sys/kernel/debug/habanalabs_cn/hbl_cn<n>/nic_override_port_status
+Date: May 2024
+KernelVersion: 6.9
+Contact: aagranovich@habana.ai
+Description: Allows the root user to force set ports link status.
+ Usage: echo <port> <status> > nic_override_port_status
+
+What: /sys/kernel/debug/habanalabs_cn/hbl_cn<n>/nic_pam4_tx_taps
+Date: May 2024
+KernelVersion: 6.9
+Contact: oshpigelman@habana.ai
+Description: Allows the root user to set and show the PAM4 Tx taps for the
+ port lanes. The lanes indices are 0-47.
+ Acceptable input string form:
+ <lane> <tx_pre2> <tx_pre1> <tx_main> <tx_post1> <tx_post2>.
+ cat nic_pam4_tx_taps will dump all taps.
+
+What: /sys/kernel/debug/habanalabs_cn/hbl_cn<n>/nic_phy_calc_ber
+Date: May 2024
+KernelVersion: 6.9
+Contact: sozeri@habana.ai
+Description: Allows the root user to enable calculation of PHY BER during the
+ PHY power_up flow.
+ value "0" is for disable, otherwise enable.
+
+What: /sys/kernel/debug/habanalabs_cn/hbl_cn<n>/nic_phy_calc_ber_wait_sec
+Date: May 2024
+KernelVersion: 6.9
+Contact: sozeri@habana.ai
+Description: Allows the root user to set the waiting time in seconds before
+ BER calculating.
+ Usage: echo <time_in_seconds> > nic_phy_calc_ber_wait_sec
+
+What: /sys/kernel/debug/habanalabs_cn/hbl_cn<n>/nic_phy_dump_serdes_params
+Date: May 2024
+KernelVersion: 6.9
+Contact: sozeri@habana.ai
+Description: Allows the root user to dump serdes parameters for a given port.
+ Need to write the port and then read it in order to dump the
+ parameters.
+ Usage: echo <port> > nic_phy_dump_serdes_params
+ cat nic_phy_dump_serdes_params
+
+What: /sys/kernel/debug/habanalabs_cn/hbl_cn<n>/nic_phy_force_first_tx_taps_cfg
+Date: May 2024
+KernelVersion: 6.9
+Contact: sozeri@habana.ai
+Description: Allows the root user to determine that every PHY power-up will
+ set the first Tx taps cfg instead of the current one.
+ Usage: echo 1 > nic_phy_force_first_tx_taps_cfg
+ cat nic_phy_force_first_tx_taps_cfg
+
+What: /sys/kernel/debug/habanalabs_cn/hbl_cn<n>/nic_phy_regs_print
+Date: May 2024
+KernelVersion: 6.9
+Contact: sozeri@habana.ai
+Description: Allows the root user to dump all PHY registers reads/writes
+ during the PHY power_up flow.
+ value "0" is for disable, otherwise enable.
+
+What: /sys/kernel/debug/habanalabs_cn/hbl_cn<n>/nic_phy_set_nrz
+Date: May 2024
+KernelVersion: 6.9
+Contact: sozeri@habana.ai
+Description: Allows the root user to set/unset NRZ mode (25Gbps speed).
+ Usage: echo 0/1 > nic_phy_set_nrz
+
+What: /sys/kernel/debug/habanalabs_cn/hbl_cn<n>/nic_polarity
+Date: May 2024
+KernelVersion: 6.9
+Contact: oshpigelman@habana.ai
+Description: Allows the root user to set the polarity for the port lanes.
+ The lanes indices are 0-47.
+ Acceptable input string form: <lane> <pol_tx> <pol_rx>.
+
+What: /sys/kernel/debug/habanalabs_cn/hbl_cn<n>/nic_print_fec_stats
+Date: May 2024
+KernelVersion: 6.9
+Contact: sozeri@habana.ai
+Description: Allows the root user to dump the FEC stats for all NIC ports to
+ dmesg.
+ Usage: cat nic_print_fec_stats
+
+What: /sys/kernel/debug/habanalabs_cn/hbl_cn<n>/nic_qp
+Date: May 2024
+KernelVersion: 6.9
+Contact: oshpigelman@habana.ai
+Description: Read a QP (Queue Pair) HW structure content. Need to write the
+ QP number, port, type and other flags to the file and then read
+ it in order to dump the QP content.
+ Input form: <port> <qpn> <is_req> <is_full_print> <force_read>.
+
+What: /sys/kernel/debug/habanalabs_cn/hbl_cn<n>/nic_rand_status
+Date: May 2024
+KernelVersion: 6.9
+Contact: oshpigelman@habana.ai
+Description: Enable randomization for the values returned in the NIC status
+ packet. Value of "0" is for disable, otherwise enable.
+
+What: /sys/kernel/debug/habanalabs_cn/hbl_cn<n>/nic_reset_cnt
+Date: May 2024
+KernelVersion: 6.9
+Contact: oshpigelman@habana.ai
+Description: Resets nic counters. Any decimal value is a valid input.
+
+What: /sys/kernel/debug/habanalabs_cn/hbl_cn<n>/nic_show_internal_ports_status
+Date: May 2024
+KernelVersion: 6.9
+Contact: sozeri@habana.ai
+Description: Allows the root user to read the link status of all internal
+ NIC ports.
+
+What: /sys/kernel/debug/habanalabs_cn/hbl_cn<n>/nic_wqe
+Date: May 2024
+KernelVersion: 6.9
+Contact: zyehudai@habana.ai
+Description: Read a WQE (Work Queue Entry) HW structure content. Need to
+ write the port, QP number, WQE index and it's type to the file
+ and then read it in order to dump the WQE content.
+ Input form: <port> <qpn> <wqe_idx> <is_tx>.
+
+What: /sys/kernel/debug/habanalabs_cn/hbl_cn<n>/nic_wqe_index_checker
+Date: May 2024
+KernelVersion: 6.9
+Contact: dmeriin@habana.ai
+Description: Allows the root user to enable/disable the WQE index checker.
+ value "0" is for disable, otherwise enable.
+ Usage: echo <enable> > nic_wqe_index_checker
diff --git a/MAINTAINERS b/MAINTAINERS
index e948e33e990d..906224204aba 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -9610,6 +9610,7 @@ L: netdev@vger.kernel.org
L: linux-rdma@vger.kernel.org
S: Supported
W: https://www.habana.ai
+F: Documentation/ABI/testing/debugfs-driver-habanalabs_cn
F: Documentation/networking/device_drivers/ethernet/intel/hbl.rst
F: drivers/net/ethernet/intel/hbl_cn/
F: include/linux/habanalabs/
diff --git a/drivers/net/ethernet/intel/hbl_cn/Makefile b/drivers/net/ethernet/intel/hbl_cn/Makefile
index 84ee2a6d7c3b..c2c4142f18a0 100644
--- a/drivers/net/ethernet/intel/hbl_cn/Makefile
+++ b/drivers/net/ethernet/intel/hbl_cn/Makefile
@@ -7,3 +7,5 @@ obj-$(CONFIG_HABANA_CN) := habanalabs_cn.o

include $(src)/common/Makefile
habanalabs_cn-y += $(HBL_CN_COMMON_FILES)
+
+habanalabs_cn-$(CONFIG_DEBUG_FS) += common/hbl_cn_debugfs.o
diff --git a/drivers/net/ethernet/intel/hbl_cn/common/hbl_cn.c b/drivers/net/ethernet/intel/hbl_cn/common/hbl_cn.c
index 4e910b2cb8ac..fc7bd6474404 100644
--- a/drivers/net/ethernet/intel/hbl_cn/common/hbl_cn.c
+++ b/drivers/net/ethernet/intel/hbl_cn/common/hbl_cn.c
@@ -1842,6 +1842,8 @@ int hbl_cn_dev_init(struct hbl_cn_device *hdev)

hbl_cn_late_init(hdev);

+ hbl_cn_debugfs_dev_init(hdev);
+
hdev->is_initialized = true;

return 0;
@@ -1878,6 +1880,8 @@ void hbl_cn_dev_fini(struct hbl_cn_device *hdev)
hbl_cn_stop(hdev->cn_aux_dev);
}

+ hbl_cn_debugfs_dev_fini(hdev);
+
hbl_cn_late_fini(hdev);

hbl_cn_ib_aux_drv_fini(hdev);
diff --git a/drivers/net/ethernet/intel/hbl_cn/common/hbl_cn.h b/drivers/net/ethernet/intel/hbl_cn/common/hbl_cn.h
index 27139e93d990..0b96cd3db719 100644
--- a/drivers/net/ethernet/intel/hbl_cn/common/hbl_cn.h
+++ b/drivers/net/ethernet/intel/hbl_cn/common/hbl_cn.h
@@ -142,6 +142,34 @@
#define hbl_cn_dma_pool_free(hdev, vaddr, dma_addr) \
__hbl_cn_dma_pool_free(hdev, vaddr, dma_addr, __func__)

+/* CN debugfs files enum */
+enum hbl_cn_debugfs_files_idx {
+ NIC_MAC_LOOPBACK = 0,
+ NIC_PAM4_TX_TAPS,
+ NIC_NRZ_TX_TAPS,
+ NIC_POLARITY,
+ NIC_QP,
+ NIC_WQE,
+ NIC_RESET_CNT,
+ NIC_MAC_LANE_REMAP,
+ NIC_RAND_STATUS,
+ NIC_MMU_BYPASS,
+ NIC_ETH_LOOPBACK,
+ NIC_PHY_REGS_PRINT,
+ NIC_SHOW_INTERNAL_PORTS_STATUS,
+ NIC_PRINT_FEC_STATS,
+ NIC_DISABLE_DECAP,
+ NIC_PHY_SET_NRZ,
+ NIC_PHY_DUMP_SERDES_PARAMS,
+ NIC_INJECT_RX_ERR,
+ NIC_PHY_CALC_BER,
+ NIC_PHY_CALC_BER_WAIT_SEC,
+ NIC_OVERRIDE_PORT_STATUS,
+ NIC_WQE_INDEX_CHECKER,
+ NIC_ACCUMULATE_FEC_DURATION,
+ NIC_PHY_FORCE_FIRST_TX_TAPS_CFG,
+};
+
extern struct hbl_cn_stat hbl_cn_mac_fec_stats[];
extern struct hbl_cn_stat hbl_cn_mac_stats_rx[];
extern struct hbl_cn_stat hbl_cn_mac_stats_tx[];
@@ -1312,6 +1340,7 @@ struct hbl_cn_properties {
* struct hbl_cn_device - habanalabs CN device structure.
* @pdev: pointer to PCI device.
* @dev: related kernel basic device structure.
+ * @cn_dentry: CN debugfs root dentry.
* @cpucp_info: FW info.
* @asic_funcs: ASIC specific functions that can be called from common code.
* @phy_tx_taps: array that holds all PAM4 Tx taps of all lanes.
@@ -1341,6 +1370,7 @@ struct hbl_cn_properties {
* @mac_loopback: enable MAC loopback on specific ports.
* @dram_size: available DRAM size.
* @mmap_type_flag: flag to indicate NIC MMAP type.
+ * @debugfs_supp_mask: mask of supported debugfs files.
* @pol_tx_mask: bitmap of tx polarity for all lanes.
* @pol_rx_mask: bitmap of rx polarity for all lanes.
* @device_timeout: device access timeout in usec.
@@ -1411,6 +1441,7 @@ struct hbl_cn_properties {
struct hbl_cn_device {
struct pci_dev *pdev;
struct device *dev;
+ struct dentry *cn_dentry;
struct hbl_cn_cpucp_info *cpucp_info;
struct hbl_cn_asic_funcs *asic_funcs;
struct hbl_cn_tx_taps *phy_tx_taps;
@@ -1441,6 +1472,7 @@ struct hbl_cn_device {
u64 mac_loopback;
u64 dram_size;
u64 mmap_type_flag;
+ u64 debugfs_supp_mask;
u64 pol_tx_mask;
u64 pol_rx_mask;
u32 device_timeout;
@@ -1534,6 +1566,8 @@ void hbl_cn_phy_set_port_status(struct hbl_cn_port *cn_port, bool up);
int hbl_cn_read_spmu_counters(struct hbl_cn_port *cn_port, u64 out_data[], u32 *num_out_data);
int hbl_cn_qp_modify(struct hbl_cn_port *cn_port, struct hbl_cn_qp *qp,
enum hbl_cn_qp_state new_state, void *params);
+void hbl_cn_debugfs_dev_init(struct hbl_cn_device *hdev);
+void hbl_cn_debugfs_dev_fini(struct hbl_cn_device *hdev);
u32 hbl_cn_get_max_qp_id(struct hbl_cn_port *cn_port);
bool hbl_cn_is_port_open(struct hbl_cn_port *cn_port);
u32 hbl_cn_get_pflags(struct hbl_cn_port *cn_port);
@@ -1614,6 +1648,9 @@ int __hbl_cn_ports_reopen(struct hbl_cn_device *hdev);
void __hbl_cn_hard_reset_prepare(struct hbl_cn_device *hdev, bool fw_reset, bool in_teardown);
void __hbl_cn_stop(struct hbl_cn_device *hdev);

+void __init hbl_cn_debugfs_init(void);
+void hbl_cn_debugfs_fini(void);
+
/* DMA memory allocations */
void *__hbl_cn_dma_alloc_coherent(struct hbl_cn_device *hdev, size_t size, dma_addr_t *dma_handle,
gfp_t flag, const char *caller);
diff --git a/drivers/net/ethernet/intel/hbl_cn/common/hbl_cn_debugfs.c b/drivers/net/ethernet/intel/hbl_cn/common/hbl_cn_debugfs.c
new file mode 100644
index 000000000000..b13da28fdcb7
--- /dev/null
+++ b/drivers/net/ethernet/intel/hbl_cn/common/hbl_cn_debugfs.c
@@ -0,0 +1,1457 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright 2020-2024 HabanaLabs, Ltd.
+ * Copyright (C) 2023-2024, Intel Corporation.
+ * All Rights Reserved.
+ */
+
+#include "hbl_cn.h"
+
+#ifdef CONFIG_DEBUG_FS
+
+#include <linux/debugfs.h>
+#include <linux/module.h>
+#include <linux/nospec.h>
+
+#define POLARITY_KBUF_SIZE 8
+#define TX_TAPS_KBUF_SIZE 25
+#define KBUF_IN_SIZE 18
+#define KBUF_OUT_SIZE BIT(12)
+#define KBUF_OUT_BIG_SIZE BIT(14)
+#define MAC_LANE_REMAP_READ_SIZE 10
+#define MAX_INT_PORT_STS_KBUF_SIZE 20
+#define HBL_CN_DEBUGFS_CREATE_FILE(op, perm, dir, dev, fops) \
+ do { \
+ enum hbl_cn_debugfs_files_idx __op = op; \
+ if (hdev->debugfs_supp_mask & BIT(__op)) \
+ debugfs_create_file(hbl_cn_debugfs_names[__op], perm, dir, dev, fops); \
+ } while (0)
+
+#define HBL_CN_DEBUGFS_CREATE_U8(op, perm, dir, fops) \
+ do { \
+ enum hbl_cn_debugfs_files_idx __op = op; \
+ if (hdev->debugfs_supp_mask & BIT(__op)) \
+ debugfs_create_u8(hbl_cn_debugfs_names[__op], perm, dir, fops); \
+ } while (0)
+
+#define HBL_CN_DEBUGFS_CREATE_U16(op, perm, dir, fops) \
+ do { \
+ enum hbl_cn_debugfs_files_idx __op = op; \
+ if (hdev->debugfs_supp_mask & BIT(__op)) \
+ debugfs_create_u16(hbl_cn_debugfs_names[__op], perm, dir, fops); \
+ } while (0)
+
+static char hbl_cn_debugfs_names[][NAME_MAX] = {
+ [NIC_MAC_LOOPBACK] = "nic_mac_loopback",
+ [NIC_PAM4_TX_TAPS] = "nic_pam4_tx_taps",
+ [NIC_NRZ_TX_TAPS] = "nic_nrz_tx_taps",
+ [NIC_POLARITY] = "nic_polarity",
+ [NIC_QP] = "nic_qp",
+ [NIC_WQE] = "nic_wqe",
+ [NIC_RESET_CNT] = "nic_reset_cnt",
+ [NIC_MAC_LANE_REMAP] = "nic_mac_lane_remap",
+ [NIC_RAND_STATUS] = "nic_rand_status",
+ [NIC_MMU_BYPASS] = "nic_mmu_bypass",
+ [NIC_ETH_LOOPBACK] = "nic_eth_loopback",
+ [NIC_PHY_REGS_PRINT] = "nic_phy_regs_print",
+ [NIC_SHOW_INTERNAL_PORTS_STATUS] = "nic_show_internal_ports_status",
+ [NIC_PRINT_FEC_STATS] = "nic_print_fec_stats",
+ [NIC_DISABLE_DECAP] = "nic_disable_decap",
+ [NIC_PHY_SET_NRZ] = "nic_phy_set_nrz",
+ [NIC_PHY_DUMP_SERDES_PARAMS] = "nic_phy_dump_serdes_params",
+ [NIC_INJECT_RX_ERR] = "nic_inject_rx_err",
+ [NIC_PHY_CALC_BER] = "nic_phy_calc_ber",
+ [NIC_PHY_CALC_BER_WAIT_SEC] = "nic_phy_calc_ber_wait_sec",
+ [NIC_OVERRIDE_PORT_STATUS] = "nic_override_port_status",
+ [NIC_WQE_INDEX_CHECKER] = "nic_wqe_index_checker",
+ [NIC_ACCUMULATE_FEC_DURATION] = "nic_accumulate_fec_duration",
+ [NIC_PHY_FORCE_FIRST_TX_TAPS_CFG] = "nic_phy_force_first_tx_taps_cfg",
+};
+
+static struct dentry *hbl_cn_debug_root;
+
+static int hbl_device_hard_reset_sync(struct hbl_cn_device *hdev)
+{
+ struct hbl_cn_aux_ops *aux_ops;
+ struct hbl_aux_dev *aux_dev;
+ ktime_t timeout;
+
+ aux_dev = hdev->cn_aux_dev;
+ aux_ops = aux_dev->aux_ops;
+
+ aux_ops->device_reset(aux_dev);
+
+ timeout = ktime_add_ms(ktime_get(), hdev->pending_reset_long_timeout * 1000ull);
+ while (!hbl_cn_comp_device_operational(hdev) && !READ_ONCE(hdev->in_teardown)) {
+ ssleep(1);
+ if (ktime_compare(ktime_get(), timeout) > 0) {
+ dev_crit(hdev->dev, "Timed out waiting for hard reset to finish\n");
+ return -ETIMEDOUT;
+ }
+ }
+
+ return 0;
+}
+
+static ssize_t debugfs_print_value_to_buffer(void *buf, size_t count, loff_t *ppos, char *fmt,
+ u32 val)
+{
+ size_t fmt_len = strlen(fmt);
+ char tmp_fmt[32] = {0};
+ char tmp[32] = {0};
+
+ if (*ppos)
+ return 0;
+
+ if (fmt_len > sizeof(tmp_fmt) - 2)
+ return -ENOMEM;
+
+ strscpy(tmp_fmt, fmt, sizeof(tmp_fmt));
+
+ tmp_fmt[fmt_len] = '\n';
+ tmp_fmt[fmt_len + 1] = '\0';
+
+ snprintf(tmp, sizeof(tmp), tmp_fmt, val);
+
+ return simple_read_from_buffer(buf, count, ppos, tmp, strlen(tmp) + 1);
+}
+
+static ssize_t debugfs_pam4_tx_taps_write(struct file *f, const char __user *buf, size_t count,
+ loff_t *ppos)
+{
+ s32 tx_pre2, tx_pre1, tx_main, tx_post1, tx_post2, *taps;
+ struct hbl_cn_device *hdev = file_inode(f)->i_private;
+ char kbuf[TX_TAPS_KBUF_SIZE] = {0};
+ u32 lane, max_num_of_lanes;
+ char *c1, *c2;
+ ssize_t rc;
+
+ max_num_of_lanes = hdev->cn_props.max_num_of_lanes;
+
+ if (count > sizeof(kbuf) - 1)
+ goto err;
+ if (copy_from_user(kbuf, buf, count))
+ goto err;
+ kbuf[count] = '\0';
+
+ c1 = kbuf;
+ c2 = strchr(c1, ' ');
+ if (!c2)
+ goto err;
+ *c2 = '\0';
+
+ rc = kstrtou32(c1, 10, &lane);
+ if (rc)
+ goto err;
+
+ if (lane >= max_num_of_lanes) {
+ dev_err(hdev->dev, "lane max value is %d\n", max_num_of_lanes - 1);
+ return -EINVAL;
+ }
+
+ /* Turn off speculation due to Spectre vulnerability */
+ lane = array_index_nospec(lane, max_num_of_lanes);
+
+ c1 = c2 + 1;
+
+ c2 = strchr(c1, ' ');
+ if (!c2)
+ goto err;
+ *c2 = '\0';
+
+ rc = kstrtos32(c1, 10, &tx_pre2);
+ if (rc)
+ goto err;
+
+ c1 = c2 + 1;
+
+ c2 = strchr(c1, ' ');
+ if (!c2)
+ goto err;
+ *c2 = '\0';
+
+ rc = kstrtos32(c1, 10, &tx_pre1);
+ if (rc)
+ goto err;
+
+ c1 = c2 + 1;
+
+ c2 = strchr(c1, ' ');
+ if (!c2)
+ goto err;
+ *c2 = '\0';
+
+ rc = kstrtos32(c1, 10, &tx_main);
+ if (rc)
+ goto err;
+
+ c1 = c2 + 1;
+
+ c2 = strchr(c1, ' ');
+ if (!c2)
+ goto err;
+ *c2 = '\0';
+
+ rc = kstrtos32(c1, 10, &tx_post1);
+ if (rc)
+ goto err;
+
+ c1 = c2 + 1;
+
+ rc = kstrtos32(c1, 10, &tx_post2);
+ if (rc)
+ goto err;
+
+ taps = hdev->phy_tx_taps[lane].pam4_taps;
+ taps[0] = tx_pre2;
+ taps[1] = tx_pre1;
+ taps[2] = tx_main;
+ taps[3] = tx_post1;
+ taps[4] = tx_post2;
+
+ return count;
+err:
+ dev_err(hdev->dev,
+ "usage: echo <lane> <tx_pre2> <tx_pre1> <tx_main> <tx_post1> <tx_post2> > nic_pam4_tx_taps\n");
+
+ return -EINVAL;
+}
+
+static ssize_t debugfs_pam4_tx_taps_read(struct file *f, char __user *buf, size_t count,
+ loff_t *ppos)
+{
+ struct hbl_cn_device *hdev = file_inode(f)->i_private;
+ u32 lane, max_num_of_lanes;
+ ssize_t rc, len;
+ char *kbuf;
+ s32 *taps;
+
+ max_num_of_lanes = hdev->cn_props.max_num_of_lanes;
+
+ if (*ppos)
+ return 0;
+
+ kbuf = kzalloc(KBUF_OUT_SIZE, GFP_KERNEL);
+ if (!kbuf)
+ return -ENOMEM;
+
+ sprintf(kbuf + strlen(kbuf), "PAM4 tx taps:\n");
+
+ for (lane = 0; lane < max_num_of_lanes; lane++) {
+ taps = hdev->phy_tx_taps[lane].pam4_taps;
+ len = strlen(kbuf);
+ if ((KBUF_OUT_SIZE - len) <= 1) {
+ rc = -EFBIG;
+ goto out;
+ }
+ snprintf(kbuf + len, KBUF_OUT_SIZE - len, "lane %u: %d %d %d %d %d\n", lane,
+ taps[0], taps[1], taps[2], taps[3], taps[4]);
+ }
+
+ rc = simple_read_from_buffer(buf, count, ppos, kbuf, strlen(kbuf) + 1);
+
+out:
+ kfree(kbuf);
+
+ return rc;
+}
+
+static const struct file_operations debugfs_pam4_tx_taps_fops = {
+ .owner = THIS_MODULE,
+ .write = debugfs_pam4_tx_taps_write,
+ .read = debugfs_pam4_tx_taps_read,
+};
+
+static ssize_t debugfs_nrz_tx_taps_write(struct file *f, const char __user *buf, size_t count,
+ loff_t *ppos)
+{
+ s32 tx_pre2, tx_pre1, tx_main, tx_post1, tx_post2, *taps;
+ struct hbl_cn_device *hdev = file_inode(f)->i_private;
+ char kbuf[TX_TAPS_KBUF_SIZE] = {0};
+ u32 lane, max_num_of_lanes;
+ char *c1, *c2;
+ ssize_t rc;
+
+ max_num_of_lanes = hdev->cn_props.max_num_of_lanes;
+
+ if (count > sizeof(kbuf) - 1)
+ goto err;
+ if (copy_from_user(kbuf, buf, count))
+ goto err;
+ kbuf[count] = '\0';
+
+ c1 = kbuf;
+ c2 = strchr(c1, ' ');
+ if (!c2)
+ goto err;
+ *c2 = '\0';
+
+ rc = kstrtou32(c1, 10, &lane);
+ if (rc)
+ goto err;
+
+ if (lane >= max_num_of_lanes) {
+ dev_err(hdev->dev, "lane max value is %d\n", max_num_of_lanes - 1);
+ return -EINVAL;
+ }
+
+ /* Turn off speculation due to Spectre vulnerability */
+ lane = array_index_nospec(lane, max_num_of_lanes);
+
+ c1 = c2 + 1;
+
+ c2 = strchr(c1, ' ');
+ if (!c2)
+ goto err;
+ *c2 = '\0';
+
+ rc = kstrtos32(c1, 10, &tx_pre2);
+ if (rc)
+ goto err;
+
+ c1 = c2 + 1;
+
+ c2 = strchr(c1, ' ');
+ if (!c2)
+ goto err;
+ *c2 = '\0';
+
+ rc = kstrtos32(c1, 10, &tx_pre1);
+ if (rc)
+ goto err;
+
+ c1 = c2 + 1;
+
+ c2 = strchr(c1, ' ');
+ if (!c2)
+ goto err;
+ *c2 = '\0';
+
+ rc = kstrtos32(c1, 10, &tx_main);
+ if (rc)
+ goto err;
+
+ c1 = c2 + 1;
+
+ c2 = strchr(c1, ' ');
+ if (!c2)
+ goto err;
+ *c2 = '\0';
+
+ rc = kstrtos32(c1, 10, &tx_post1);
+ if (rc)
+ goto err;
+
+ c1 = c2 + 1;
+
+ rc = kstrtos32(c1, 10, &tx_post2);
+ if (rc)
+ goto err;
+
+ taps = hdev->phy_tx_taps[lane].nrz_taps;
+ taps[0] = tx_pre2;
+ taps[1] = tx_pre1;
+ taps[2] = tx_main;
+ taps[3] = tx_post1;
+ taps[4] = tx_post2;
+
+ return count;
+err:
+ dev_err(hdev->dev,
+ "usage: echo <lane> <tx_pre2> <tx_pre1> <tx_main> <tx_post1> <tx_post2> > nic_nrz_tx_taps\n");
+
+ return -EINVAL;
+}
+
+static ssize_t debugfs_nrz_tx_taps_read(struct file *f, char __user *buf, size_t count,
+ loff_t *ppos)
+{
+ struct hbl_cn_device *hdev = file_inode(f)->i_private;
+ u32 lane, max_num_of_lanes;
+ ssize_t rc, len;
+ char *kbuf;
+ s32 *taps;
+
+ max_num_of_lanes = hdev->cn_props.max_num_of_lanes;
+
+ if (*ppos)
+ return 0;
+
+ kbuf = kzalloc(KBUF_OUT_SIZE, GFP_KERNEL);
+ if (!kbuf)
+ return -ENOMEM;
+
+ sprintf(kbuf + strlen(kbuf), "NRZ tx taps:\n");
+
+ for (lane = 0; lane < max_num_of_lanes; lane++) {
+ taps = hdev->phy_tx_taps[lane].nrz_taps;
+ len = strlen(kbuf);
+ if ((KBUF_OUT_SIZE - len) <= 1) {
+ rc = -EFBIG;
+ goto out;
+ }
+ snprintf(kbuf + len, KBUF_OUT_SIZE - len, "lane %u: %d %d %d %d %d\n", lane,
+ taps[0], taps[1], taps[2], taps[3], taps[4]);
+ }
+
+ rc = simple_read_from_buffer(buf, count, ppos, kbuf, strlen(kbuf) + 1);
+
+out:
+ kfree(kbuf);
+
+ return rc;
+}
+
+static const struct file_operations debugfs_nrz_tx_taps_fops = {
+ .owner = THIS_MODULE,
+ .write = debugfs_nrz_tx_taps_write,
+ .read = debugfs_nrz_tx_taps_read,
+};
+
+static ssize_t debugfs_polarity_write(struct file *f, const char __user *buf, size_t count,
+ loff_t *ppos)
+{
+ struct hbl_cn_device *hdev = file_inode(f)->i_private;
+ char kbuf[POLARITY_KBUF_SIZE] = {0};
+ u32 lane, max_num_of_lanes;
+ u8 pol_tx, pol_rx;
+ char *c1, *c2;
+ ssize_t rc;
+ u64 val;
+
+ max_num_of_lanes = hdev->cn_props.max_num_of_lanes;
+
+ if (count > sizeof(kbuf) - 1)
+ goto err;
+ if (copy_from_user(kbuf, buf, count))
+ goto err;
+ kbuf[count] = '\0';
+
+ c1 = kbuf;
+ c2 = strchr(c1, ' ');
+ if (!c2)
+ goto err;
+ *c2 = '\0';
+
+ rc = kstrtou32(c1, 10, &lane);
+ if (rc)
+ goto err;
+
+ if (lane >= max_num_of_lanes) {
+ dev_err(hdev->dev, "lane max value is %d\n", max_num_of_lanes - 1);
+ return -EINVAL;
+ }
+
+ c1 = c2 + 1;
+
+ c2 = strchr(c1, ' ');
+ if (!c2)
+ goto err;
+ *c2 = '\0';
+
+ rc = kstrtou8(c1, 10, &pol_tx);
+ if (rc)
+ goto err;
+
+ c1 = c2 + 1;
+
+ rc = kstrtou8(c1, 10, &pol_rx);
+ if (rc)
+ goto err;
+
+ if ((pol_tx & ~1) || (pol_rx & ~1)) {
+ dev_err(hdev->dev, "pol_tx and pol_rx should be 0 or 1\n");
+ goto err;
+ }
+
+ val = hdev->pol_tx_mask;
+ val &= ~BIT_ULL(lane);
+ val |= ((u64)pol_tx) << lane;
+ hdev->pol_tx_mask = val;
+
+ val = hdev->pol_rx_mask;
+ val &= ~BIT_ULL(lane);
+ val |= ((u64)pol_rx) << lane;
+ hdev->pol_rx_mask = val;
+
+ /* This flag is set to prevent overwriting the new values after reset */
+ hdev->skip_phy_pol_cfg = true;
+
+ return count;
+err:
+ dev_err(hdev->dev, "usage: echo <lane> <pol_tx> <pol_rx> > nic_polarity\n");
+
+ return -EINVAL;
+}
+
+static const struct file_operations debugfs_polarity_fops = {
+ .owner = THIS_MODULE,
+ .write = debugfs_polarity_write,
+};
+
+static ssize_t debugfs_qp_read(struct file *f, char __user *buf, size_t count, loff_t *ppos)
+{
+ struct hbl_cn_device *hdev = file_inode(f)->i_private;
+ struct hbl_cn_asic_funcs *asic_funcs;
+ char *kbuf;
+ ssize_t rc;
+
+ asic_funcs = hdev->asic_funcs;
+
+ if (*ppos)
+ return 0;
+
+ kbuf = kzalloc(KBUF_OUT_SIZE, GFP_KERNEL);
+ if (!kbuf)
+ return -ENOMEM;
+
+ rc = asic_funcs->qp_read(hdev, &hdev->qp_info, kbuf, KBUF_OUT_SIZE);
+ if (rc)
+ goto out;
+
+ rc = simple_read_from_buffer(buf, count, ppos, kbuf, strlen(kbuf) + 1);
+
+out:
+ kfree(kbuf);
+
+ return rc;
+}
+
+static ssize_t debugfs_qp_write(struct file *f, const char __user *buf, size_t count, loff_t *ppos)
+{
+ struct hbl_cn_device *hdev = file_inode(f)->i_private;
+ struct hbl_cn_qp_info *qp_info = &hdev->qp_info;
+ u32 port, qpn, max_num_of_ports;
+ u8 req, full_print, force_read;
+ char kbuf[KBUF_IN_SIZE] = {0};
+ char *c1, *c2;
+ ssize_t rc;
+
+ max_num_of_ports = hdev->cn_props.max_num_of_ports;
+
+ if (count > sizeof(kbuf) - 1)
+ goto err;
+ if (copy_from_user(kbuf, buf, count))
+ goto err;
+ kbuf[count] = '\0';
+
+ c1 = kbuf;
+ c2 = strchr(c1, ' ');
+ if (!c2)
+ goto err;
+ *c2 = '\0';
+
+ rc = kstrtou32(c1, 10, &port);
+ if (rc)
+ goto err;
+
+ if (port >= max_num_of_ports) {
+ dev_err(hdev->dev, "port max value is %d\n", max_num_of_ports - 1);
+ return -EINVAL;
+ }
+
+ c1 = c2 + 1;
+
+ c2 = strchr(c1, ' ');
+ if (!c2)
+ goto err;
+ *c2 = '\0';
+
+ rc = kstrtou32(c1, 10, &qpn);
+ if (rc)
+ goto err;
+
+ c1 = c2 + 1;
+
+ c2 = strchr(c1, ' ');
+ if (!c2)
+ goto err;
+ *c2 = '\0';
+
+ rc = kstrtou8(c1, 10, &req);
+ if (rc)
+ goto err;
+
+ if (req & ~1) {
+ dev_err(hdev->dev, "req should be 0 or 1\n");
+ goto err;
+ }
+
+ c1 = c2 + 1;
+
+ c2 = strchr(c1, ' ');
+ if (!c2)
+ goto err;
+ *c2 = '\0';
+
+ rc = kstrtou8(c1, 10, &full_print);
+ if (rc)
+ goto err;
+
+ if (full_print & ~1) {
+ dev_err(hdev->dev, "full_print should be 0 or 1\n");
+ goto err;
+ }
+
+ c1 = c2 + 1;
+
+ /* may not be the last element due to the optional params */
+ c2 = strchr(c1, ' ');
+ if (c2)
+ *c2 = '\0';
+
+ rc = kstrtou8(c1, 10, &force_read);
+ if (rc)
+ goto err;
+
+ if (force_read & ~1) {
+ dev_err(hdev->dev, "force_read should be 0 or 1\n");
+ goto err;
+ }
+
+ qp_info->port = port;
+ qp_info->qpn = qpn;
+ qp_info->req = req;
+ qp_info->full_print = full_print;
+ qp_info->force_read = force_read;
+
+ return count;
+err:
+ dev_err(hdev->dev,
+ "usage: echo <port> <qpn> <is_req> <is_full_print> <force_read> [<exts_print>] > nic_qp\n");
+
+ return -EINVAL;
+}
+
+static const struct file_operations debugfs_qp_fops = {
+ .owner = THIS_MODULE,
+ .read = debugfs_qp_read,
+ .write = debugfs_qp_write
+};
+
+static ssize_t debugfs_wqe_read(struct file *f, char __user *buf, size_t count, loff_t *ppos)
+{
+ struct hbl_cn_device *hdev = file_inode(f)->i_private;
+ struct hbl_cn_asic_funcs *asic_funcs;
+ char *kbuf;
+ ssize_t rc;
+
+ asic_funcs = hdev->asic_funcs;
+
+ if (*ppos)
+ return 0;
+
+ kbuf = kzalloc(KBUF_OUT_SIZE, GFP_KERNEL);
+ if (!kbuf)
+ return -ENOMEM;
+
+ rc = asic_funcs->wqe_read(hdev, kbuf, KBUF_OUT_SIZE);
+ if (rc)
+ goto out;
+
+ rc = simple_read_from_buffer(buf, count, ppos, kbuf, strlen(kbuf) + 1);
+
+out:
+ kfree(kbuf);
+
+ return rc;
+}
+
+static ssize_t debugfs_wqe_write(struct file *f, const char __user *buf, size_t count, loff_t *ppos)
+{
+ struct hbl_cn_device *hdev = file_inode(f)->i_private;
+ struct hbl_cn_wqe_info *wqe_info = &hdev->wqe_info;
+ u32 port, qpn, wqe_idx, max_num_of_lanes;
+ char kbuf[KBUF_IN_SIZE] = {0};
+ char *c1, *c2;
+ ssize_t rc;
+ u8 tx;
+
+ max_num_of_lanes = hdev->cn_props.max_num_of_lanes;
+
+ if (count > sizeof(kbuf) - 1)
+ goto err;
+ if (copy_from_user(kbuf, buf, count))
+ goto err;
+ kbuf[count] = '\0';
+
+ c1 = kbuf;
+ c2 = strchr(c1, ' ');
+ if (!c2)
+ goto err;
+ *c2 = '\0';
+
+ rc = kstrtou32(c1, 10, &port);
+ if (rc)
+ goto err;
+
+ if (port >= max_num_of_lanes) {
+ dev_err(hdev->dev, "port max value is %d\n", max_num_of_lanes - 1);
+ return -EINVAL;
+ }
+
+ c1 = c2 + 1;
+
+ c2 = strchr(c1, ' ');
+ if (!c2)
+ goto err;
+ *c2 = '\0';
+
+ rc = kstrtou32(c1, 10, &qpn);
+ if (rc)
+ goto err;
+
+ c1 = c2 + 1;
+
+ c2 = strchr(c1, ' ');
+ if (!c2)
+ goto err;
+ *c2 = '\0';
+
+ rc = kstrtou32(c1, 10, &wqe_idx);
+ if (rc)
+ goto err;
+
+ c1 = c2 + 1;
+
+ rc = kstrtou8(c1, 10, &tx);
+ if (rc)
+ goto err;
+
+ if (tx & ~1) {
+ dev_err(hdev->dev, "tx should be 0 or 1\n");
+ goto err;
+ }
+
+ wqe_info->port = port;
+ wqe_info->qpn = qpn;
+ wqe_info->wqe_idx = wqe_idx;
+ wqe_info->tx = tx;
+
+ return count;
+err:
+ dev_err(hdev->dev, "usage: echo <port> <qpn> <wqe_idx> <is_tx> > nic_wqe\n");
+
+ return -EINVAL;
+}
+
+static const struct file_operations debugfs_wqe_fops = {
+ .owner = THIS_MODULE,
+ .read = debugfs_wqe_read,
+ .write = debugfs_wqe_write
+};
+
+static ssize_t debugfs_reset_cnt_write(struct file *f, const char __user *buf, size_t count,
+ loff_t *ppos)
+{
+ struct hbl_cn_device *hdev = file_inode(f)->i_private;
+ ssize_t rc;
+ u32 val;
+
+ rc = kstrtou32_from_user(buf, count, 10, &val);
+ if (rc)
+ return rc;
+
+ hbl_cn_reset_ports_toggle_counters(hdev);
+ hbl_cn_reset_stats_counters(hdev);
+
+ return count;
+}
+
+static const struct file_operations debugfs_reset_cnt_fops = {
+ .owner = THIS_MODULE,
+ .write = debugfs_reset_cnt_write
+};
+
+static int parse_user_mac_lane_remap_data(u32 *dest_arr, int *dest_arr_cnt, char *buf, int count)
+{
+ int i = 0, j = 0, rc;
+ int offset;
+ u32 val;
+
+ while (i < count) {
+ offset = strcspn(&buf[i], " ");
+ buf[i + offset] = '\0';
+
+ rc = kstrtou32(&buf[i], 16, &val);
+ if (rc)
+ return rc;
+
+ dest_arr[j++] = val;
+ i += (offset + 1);
+ }
+
+ *dest_arr_cnt = j;
+
+ return 0;
+}
+
+static ssize_t debugfs_mac_lane_remap_write(struct file *f, const char __user *buf, size_t count,
+ loff_t *ppos)
+{
+ struct hbl_cn_device *hdev = file_inode(f)->i_private;
+ struct hbl_cn_properties *cn_props;
+ u32 *mac_lane_remap_buf;
+ int rc, n_parsed = 0;
+ char *kbuf;
+
+ cn_props = &hdev->cn_props;
+
+ kbuf = kcalloc(count + 1, sizeof(*buf), GFP_KERNEL);
+ if (!kbuf)
+ return -ENOMEM;
+
+ mac_lane_remap_buf = kcalloc(cn_props->num_of_macros, sizeof(*mac_lane_remap_buf),
+ GFP_KERNEL);
+ if (!mac_lane_remap_buf) {
+ rc = -ENOMEM;
+ goto err_free_kbuf;
+ }
+
+ rc = copy_from_user(kbuf, buf, count);
+ if (rc)
+ goto err_free_mac_lane_remap_buf;
+
+ /* Add trailing space to simplify parsing user data. */
+ kbuf[count] = ' ';
+
+ rc = parse_user_mac_lane_remap_data(mac_lane_remap_buf, &n_parsed, kbuf, count + 1);
+ if (rc || n_parsed != cn_props->num_of_macros) {
+ rc = -EINVAL;
+ goto err_parse;
+ }
+
+ memcpy(hdev->mac_lane_remap, mac_lane_remap_buf,
+ sizeof(*mac_lane_remap_buf) * cn_props->num_of_macros);
+
+ rc = hbl_device_hard_reset_sync(hdev);
+ if (rc)
+ goto err_free_mac_lane_remap_buf;
+
+ kfree(mac_lane_remap_buf);
+ kfree(kbuf);
+
+ return count;
+err_parse:
+ dev_err_ratelimited(hdev->dev,
+ "usage: echo macro0 macro1 macro2 ... macroX > mac_lane_remap\n");
+err_free_mac_lane_remap_buf:
+ kfree(mac_lane_remap_buf);
+err_free_kbuf:
+ kfree(kbuf);
+ return -EINVAL;
+}
+
+static ssize_t debugfs_mac_lane_remap_read(struct file *f, char __user *buf, size_t count,
+ loff_t *ppos)
+{
+ struct hbl_cn_device *hdev = file_inode(f)->i_private;
+ char kbuf[MAC_LANE_REMAP_READ_SIZE];
+ struct hbl_cn_properties *cn_props;
+ int i, j;
+
+ cn_props = &hdev->cn_props;
+
+ if (*ppos)
+ return 0;
+
+ for (i = 0, j = 0; i < cn_props->num_of_macros; i++, j += MAC_LANE_REMAP_READ_SIZE) {
+ memset(kbuf, 0, MAC_LANE_REMAP_READ_SIZE);
+ sprintf(kbuf, "0x%x ", hdev->mac_lane_remap[i]);
+
+ if (copy_to_user(&buf[j], kbuf, MAC_LANE_REMAP_READ_SIZE)) {
+ dev_err(hdev->dev, "error in copying lane info to user\n");
+ return -EFAULT;
+ }
+
+ *ppos += MAC_LANE_REMAP_READ_SIZE;
+ }
+
+ return j + 1;
+}
+
+static const struct file_operations debugfs_mac_lane_remap_fops = {
+ .owner = THIS_MODULE,
+ .write = debugfs_mac_lane_remap_write,
+ .read = debugfs_mac_lane_remap_read,
+};
+
+static ssize_t debugfs_eth_loopback_write(struct file *f, const char __user *buf, size_t count,
+ loff_t *ppos)
+{
+ struct hbl_cn_device *hdev = file_inode(f)->i_private;
+ u32 val = 0;
+ int rc;
+
+ rc = kstrtou32_from_user(buf, count, 10, &val);
+ if (rc)
+ return rc;
+
+ hdev->eth_loopback = !!val;
+
+ dev_info(hdev->dev, "%s eth_loopback\n", hdev->eth_loopback ? "enable" : "disable");
+
+ return count;
+}
+
+static ssize_t debugfs_eth_loopback_read(struct file *f, char __user *buf, size_t count,
+ loff_t *ppos)
+{
+ struct hbl_cn_device *hdev = file_inode(f)->i_private;
+
+ return debugfs_print_value_to_buffer(buf, count, ppos, "%u", hdev->eth_loopback);
+}
+
+static const struct file_operations debugfs_eth_loopback_fops = {
+ .owner = THIS_MODULE,
+ .write = debugfs_eth_loopback_write,
+ .read = debugfs_eth_loopback_read,
+};
+
+static ssize_t debugfs_phy_regs_print_write(struct file *f, const char __user *buf, size_t count,
+ loff_t *ppos)
+{
+ struct hbl_cn_device *hdev = file_inode(f)->i_private;
+ u32 val = 0;
+ int rc;
+
+ rc = kstrtou32_from_user(buf, count, 10, &val);
+ if (rc)
+ return rc;
+
+ hdev->phy_regs_print = !!val;
+
+ dev_info(hdev->dev, "%s printing PHY registers\n",
+ hdev->phy_regs_print ? "enable" : "disable");
+
+ return count;
+}
+
+static ssize_t debugfs_phy_regs_print_read(struct file *f, char __user *buf, size_t count,
+ loff_t *ppos)
+{
+ struct hbl_cn_device *hdev = file_inode(f)->i_private;
+
+ return debugfs_print_value_to_buffer(buf, count, ppos, "%u", hdev->phy_regs_print);
+}
+
+static const struct file_operations debugfs_phy_regs_print_fops = {
+ .owner = THIS_MODULE,
+ .write = debugfs_phy_regs_print_write,
+ .read = debugfs_phy_regs_print_read,
+};
+
+static ssize_t debugfs_show_internal_ports_status_read(struct file *f, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct hbl_cn_device *hdev = file_inode(f)->i_private;
+ char kbuf[MAX_INT_PORT_STS_KBUF_SIZE];
+ struct hbl_cn_port *cn_port;
+ int i, cnt, total_cnt;
+
+ if (*ppos)
+ return 0;
+
+ total_cnt = 0;
+
+ for (i = 0; i < hdev->cn_props.max_num_of_ports; i++) {
+ if (!(hdev->ports_mask & BIT(i)) || (hdev->ext_ports_mask & BIT(i)))
+ continue;
+
+ cn_port = &hdev->cn_ports[i];
+
+ memset(kbuf, 0, MAX_INT_PORT_STS_KBUF_SIZE);
+ cnt = sprintf(kbuf, "Port %-2u: %s\n",
+ cn_port->port, cn_port->pcs_link ? "UP" : "DOWN");
+
+ if (copy_to_user(&buf[total_cnt], kbuf, cnt)) {
+ dev_err(hdev->dev, "error in copying info to user\n");
+ return -EFAULT;
+ }
+
+ total_cnt += cnt;
+ *ppos += cnt;
+ }
+
+ if (!total_cnt) {
+ char *msg = "No internal ports found\n";
+
+ return simple_read_from_buffer(buf, count, ppos, msg, strlen(msg));
+ }
+
+ return total_cnt + 1;
+}
+
+static const struct file_operations debugfs_show_internal_ports_status_fops = {
+ .owner = THIS_MODULE,
+ .read = debugfs_show_internal_ports_status_read,
+};
+
+static ssize_t debugfs_print_fec_stats_read(struct file *f, char __user *buf, size_t count,
+ loff_t *ppos)
+{
+ struct hbl_cn_device *hdev = file_inode(f)->i_private;
+ struct hbl_cn_asic_funcs *asic_funcs;
+ struct hbl_cn_port *cn_port;
+ char *kbuf;
+ int i, rc;
+
+ asic_funcs = hdev->asic_funcs;
+
+ if (*ppos)
+ return 0;
+
+ kbuf = kzalloc(KBUF_OUT_BIG_SIZE, GFP_KERNEL);
+ if (!kbuf)
+ return -ENOMEM;
+
+ sprintf(kbuf + strlen(kbuf), "Card %u FEC stats:\n", hdev->card_location);
+
+ for (i = 0; i < hdev->cn_props.max_num_of_ports; i++) {
+ if (!(hdev->ports_mask & BIT(i)))
+ continue;
+
+ cn_port = &hdev->cn_ports[i];
+
+ asic_funcs->port_funcs->collect_fec_stats(cn_port, kbuf, KBUF_OUT_BIG_SIZE);
+ }
+
+ rc = simple_read_from_buffer(buf, count, ppos, kbuf, strlen(kbuf) + 1);
+
+ kfree(kbuf);
+
+ return rc;
+}
+
+static const struct file_operations debugfs_print_fec_stats_fops = {
+ .owner = THIS_MODULE,
+ .read = debugfs_print_fec_stats_read,
+};
+
+static ssize_t debugfs_phy_set_nrz_write(struct file *f, const char __user *buf, size_t count,
+ loff_t *ppos)
+{
+ struct hbl_cn_device *hdev = file_inode(f)->i_private;
+ bool val;
+ int rc;
+
+ rc = kstrtobool_from_user(buf, count, &val);
+ if (rc)
+ return rc;
+
+ if (val == hdev->phy_set_nrz)
+ return count;
+
+ hdev->phy_set_nrz = val;
+ hdev->skip_phy_default_tx_taps_cfg = 0;
+
+ dev_info(hdev->dev, "%s NRZ mode\n", hdev->phy_set_nrz ? "Enable" : "Disable");
+
+ rc = hbl_device_hard_reset_sync(hdev);
+ if (rc)
+ return -EINVAL;
+
+ return count;
+}
+
+static const struct file_operations debugfs_phy_set_nrz_fops = {
+ .owner = THIS_MODULE,
+ .write = debugfs_phy_set_nrz_write,
+};
+
+static ssize_t debugfs_phy_dump_serdes_params_read(struct file *f, char __user *buf, size_t count,
+ loff_t *ppos)
+{
+ struct hbl_cn_device *hdev = file_inode(f)->i_private;
+ struct hbl_cn_asic_funcs *asic_funcs;
+ char *kbuf;
+ ssize_t rc;
+
+ asic_funcs = hdev->asic_funcs;
+
+ if (*ppos)
+ return 0;
+
+ /* For ASICs that don't support this feature, return an error */
+ if (!asic_funcs->phy_dump_serdes_params)
+ return -EINVAL;
+
+ kbuf = kzalloc(KBUF_OUT_BIG_SIZE, GFP_KERNEL);
+ if (!kbuf)
+ return -ENOMEM;
+
+ asic_funcs->phy_dump_serdes_params(hdev, kbuf, KBUF_OUT_BIG_SIZE);
+
+ rc = simple_read_from_buffer(buf, count, ppos, kbuf, strlen(kbuf) + 1);
+
+ kfree(kbuf);
+
+ return rc;
+}
+
+static ssize_t debugfs_phy_dump_serdes_params_write(struct file *f, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct hbl_cn_device *hdev = file_inode(f)->i_private;
+ struct hbl_cn_asic_funcs *asic_funcs;
+ u32 port;
+ int rc;
+
+ asic_funcs = hdev->asic_funcs;
+
+ /* For ASICs that don't support this feature, return an error */
+ if (!asic_funcs->phy_dump_serdes_params)
+ return -EINVAL;
+
+ rc = kstrtou32_from_user(buf, count, 10, &port);
+ if (rc)
+ return rc;
+
+ if (port >= hdev->cn_props.max_num_of_ports) {
+ dev_err(hdev->dev, "Invalid port number %u\n", port);
+ return -EINVAL;
+ }
+
+ hdev->phy_port_to_dump = port;
+
+ return count;
+}
+
+static const struct file_operations debugfs_phy_dump_serdes_params_fops = {
+ .owner = THIS_MODULE,
+ .read = debugfs_phy_dump_serdes_params_read,
+ .write = debugfs_phy_dump_serdes_params_write,
+};
+
+static ssize_t debugfs_inject_rx_err_read(struct file *f, char __user *buf, size_t count,
+ loff_t *ppos)
+{
+ struct hbl_cn_device *hdev = file_inode(f)->i_private;
+
+ return debugfs_print_value_to_buffer(buf, count, ppos, "%u", hdev->rx_drop_percent);
+}
+
+static ssize_t debugfs_inject_rx_err_write(struct file *f, const char __user *buf, size_t count,
+ loff_t *ppos)
+{
+ struct hbl_cn_device *hdev = file_inode(f)->i_private;
+ struct hbl_cn_asic_funcs *asic_funcs;
+ u32 val;
+ int rc;
+
+ asic_funcs = hdev->asic_funcs;
+
+ if (*ppos)
+ return 0;
+
+ rc = kstrtou32_from_user(buf, count, 10, &val);
+ if (rc)
+ return rc;
+
+ if (val > 100) {
+ dev_dbg_ratelimited(hdev->dev, "Invalid drop percentage %d\n", val);
+ return -EINVAL;
+ }
+
+ asic_funcs->inject_rx_err(hdev, val);
+
+ return count;
+}
+
+static const struct file_operations debugfs_inject_rx_err_fops = {
+ .owner = THIS_MODULE,
+ .read = debugfs_inject_rx_err_read,
+ .write = debugfs_inject_rx_err_write,
+};
+
+static ssize_t debugfs_override_port_status_write(struct file *f, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct hbl_cn_device *hdev = file_inode(f)->i_private;
+ char kbuf[KBUF_IN_SIZE] = {0};
+ struct hbl_cn_port *cn_port;
+ u32 port, max_num_of_ports;
+ char *c1, *c2;
+ ssize_t rc;
+ u8 up;
+
+ max_num_of_ports = hdev->cn_props.max_num_of_ports;
+
+ if (count > sizeof(kbuf) - 1)
+ goto err;
+ if (copy_from_user(kbuf, buf, count))
+ goto err;
+ kbuf[count] = '\0';
+
+ c1 = kbuf;
+ c2 = strchr(c1, ' ');
+ if (!c2)
+ goto err;
+ *c2 = '\0';
+
+ rc = kstrtou32(c1, 10, &port);
+ if (rc)
+ goto err;
+
+ if (port >= max_num_of_ports) {
+ dev_err(hdev->dev, "port max value is %d\n", max_num_of_ports - 1);
+ return -EINVAL;
+ }
+
+ /* Turn off speculation due to Spectre vulnerability */
+ port = array_index_nospec(port, max_num_of_ports);
+
+ c1 = c2 + 1;
+
+ rc = kstrtou8(c1, 10, &up);
+ if (rc)
+ goto err;
+
+ if (hdev->ports_mask & BIT(port)) {
+ cn_port = &hdev->cn_ports[port];
+
+ cn_port->pcs_link = !!up;
+ hbl_cn_phy_set_port_status(cn_port, !!up);
+ }
+
+ return count;
+err:
+ dev_err(hdev->dev, "usage: echo <port> <status> > nic_override_port_status\n");
+
+ return -EINVAL;
+}
+
+static const struct file_operations debugfs_override_port_status_fops = {
+ .owner = THIS_MODULE,
+ .write = debugfs_override_port_status_write,
+};
+
+static ssize_t debugfs_write_wqe_index_checker(struct file *f, const char __user *buf, size_t count,
+ loff_t *ppos)
+{
+ struct hbl_cn_device *hdev = file_inode(f)->i_private;
+ struct hbl_cn_asic_funcs *asic_funcs;
+ u32 val;
+ int rc;
+
+ asic_funcs = hdev->asic_funcs;
+
+ /* For ASICs that don't support this feature, return an error */
+ if (!asic_funcs->set_wqe_index_checker)
+ return -EINVAL;
+
+ rc = kstrtou32_from_user(buf, count, 10, &val);
+ if (rc)
+ return rc;
+
+ rc = asic_funcs->set_wqe_index_checker(hdev, !!val);
+ if (rc)
+ return rc;
+
+ return count;
+}
+
+static ssize_t debugfs_read_wqe_index_checker(struct file *f, char __user *buf, size_t count,
+ loff_t *ppos)
+{
+ struct hbl_cn_device *hdev = file_inode(f)->i_private;
+ struct hbl_cn_asic_funcs *asic_funcs;
+ u32 index_checker;
+
+ asic_funcs = hdev->asic_funcs;
+
+ if (!asic_funcs->get_wqe_index_checker)
+ return -EINVAL;
+
+ index_checker = asic_funcs->get_wqe_index_checker(hdev);
+
+ return debugfs_print_value_to_buffer(buf, count, ppos, "%u", index_checker);
+}
+
+static const struct file_operations debugfs_wqe_index_checker_fops = {
+ .owner = THIS_MODULE,
+ .write = debugfs_write_wqe_index_checker,
+ .read = debugfs_read_wqe_index_checker,
+};
+
+static ssize_t debugfs_accumulate_fec_duration_write(struct file *f, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct hbl_cn_device *hdev = file_inode(f)->i_private;
+ u32 val = 0;
+ int rc;
+
+ rc = kstrtou32_from_user(buf, count, 10, &val);
+ if (rc)
+ return rc;
+
+ if (!val || val > ACCUMULATE_FEC_STATS_DURATION_MS_MAX)
+ return -EINVAL;
+
+ hdev->accumulate_fec_duration = val;
+
+ return count;
+}
+
+static ssize_t debugfs_accumulate_fec_duration_read(struct file *f, char __user *buf, size_t count,
+ loff_t *ppos)
+{
+ struct hbl_cn_device *hdev = file_inode(f)->i_private;
+
+ return debugfs_print_value_to_buffer(buf, count, ppos, "%u",
+ hdev->accumulate_fec_duration);
+}
+
+static const struct file_operations debugfs_accumulate_fec_duration_fops = {
+ .owner = THIS_MODULE,
+ .write = debugfs_accumulate_fec_duration_write,
+ .read = debugfs_accumulate_fec_duration_read,
+};
+
+static ssize_t debugfs_mac_loopback_read(struct file *f, char __user *buf, size_t count,
+ loff_t *ppos)
+{
+ struct hbl_cn_device *hdev = file_inode(f)->i_private;
+
+ return debugfs_print_value_to_buffer(buf, count, ppos, "0x%llx", hdev->mac_loopback);
+}
+
+static ssize_t debugfs_mac_loopback_write(struct file *f, const char __user *buf, size_t count,
+ loff_t *ppos)
+{
+ struct hbl_cn_device *hdev = file_inode(f)->i_private;
+ ssize_t ret;
+ u64 val;
+ int rc;
+
+ ret = kstrtoull_from_user(buf, count, 16, &val);
+ if (ret)
+ return ret;
+
+ if (val == hdev->mac_loopback)
+ return count;
+
+ hdev->mac_loopback = val;
+ rc = hbl_device_hard_reset_sync(hdev);
+ if (rc)
+ return rc;
+
+ return count;
+}
+
+static const struct file_operations debugfs_mac_loopback_fops = {
+ .owner = THIS_MODULE,
+ .read = debugfs_mac_loopback_read,
+ .write = debugfs_mac_loopback_write,
+};
+
+static void __hbl_cn_debugfs_dev_init(struct hbl_cn_device *hdev, struct dentry *root_dir)
+{
+ HBL_CN_DEBUGFS_CREATE_FILE(NIC_MAC_LOOPBACK, 0644, root_dir, hdev,
+ &debugfs_mac_loopback_fops);
+
+ HBL_CN_DEBUGFS_CREATE_FILE(NIC_PAM4_TX_TAPS, 0444, root_dir, hdev,
+ &debugfs_pam4_tx_taps_fops);
+
+ HBL_CN_DEBUGFS_CREATE_FILE(NIC_NRZ_TX_TAPS, 0444, root_dir, hdev,
+ &debugfs_nrz_tx_taps_fops);
+
+ HBL_CN_DEBUGFS_CREATE_FILE(NIC_POLARITY, 0444, root_dir, hdev, &debugfs_polarity_fops);
+
+ HBL_CN_DEBUGFS_CREATE_FILE(NIC_QP, 0444, root_dir, hdev, &debugfs_qp_fops);
+
+ HBL_CN_DEBUGFS_CREATE_FILE(NIC_WQE, 0444, root_dir, hdev, &debugfs_wqe_fops);
+
+ HBL_CN_DEBUGFS_CREATE_FILE(NIC_RESET_CNT, 0444, root_dir, hdev,
+ &debugfs_reset_cnt_fops);
+
+ HBL_CN_DEBUGFS_CREATE_FILE(NIC_MAC_LANE_REMAP, 0644, root_dir, hdev,
+ &debugfs_mac_lane_remap_fops);
+
+ HBL_CN_DEBUGFS_CREATE_U8(NIC_RAND_STATUS, 0644, root_dir, &hdev->rand_status);
+
+ HBL_CN_DEBUGFS_CREATE_U8(NIC_MMU_BYPASS, 0644, root_dir, &hdev->mmu_bypass);
+
+ HBL_CN_DEBUGFS_CREATE_FILE(NIC_ETH_LOOPBACK, 0644, root_dir, hdev,
+ &debugfs_eth_loopback_fops);
+
+ HBL_CN_DEBUGFS_CREATE_FILE(NIC_PHY_REGS_PRINT, 0444, root_dir, hdev,
+ &debugfs_phy_regs_print_fops);
+
+ HBL_CN_DEBUGFS_CREATE_FILE(NIC_SHOW_INTERNAL_PORTS_STATUS, 0444, root_dir, hdev,
+ &debugfs_show_internal_ports_status_fops);
+
+ HBL_CN_DEBUGFS_CREATE_FILE(NIC_PRINT_FEC_STATS, 0444, root_dir, hdev,
+ &debugfs_print_fec_stats_fops);
+
+ HBL_CN_DEBUGFS_CREATE_U8(NIC_DISABLE_DECAP, 0644, root_dir, &hdev->is_decap_disabled);
+
+ HBL_CN_DEBUGFS_CREATE_FILE(NIC_PHY_SET_NRZ, 0444, root_dir, hdev,
+ &debugfs_phy_set_nrz_fops);
+
+ HBL_CN_DEBUGFS_CREATE_FILE(NIC_PHY_DUMP_SERDES_PARAMS, 0444, root_dir, hdev,
+ &debugfs_phy_dump_serdes_params_fops);
+
+ HBL_CN_DEBUGFS_CREATE_FILE(NIC_INJECT_RX_ERR, 0444, root_dir, hdev,
+ &debugfs_inject_rx_err_fops);
+
+ HBL_CN_DEBUGFS_CREATE_U8(NIC_PHY_CALC_BER, 0644, root_dir, &hdev->phy_calc_ber);
+
+ HBL_CN_DEBUGFS_CREATE_U16(NIC_PHY_CALC_BER_WAIT_SEC, 0644, root_dir,
+ &hdev->phy_calc_ber_wait_sec);
+
+ HBL_CN_DEBUGFS_CREATE_FILE(NIC_OVERRIDE_PORT_STATUS, 0200, root_dir, hdev,
+ &debugfs_override_port_status_fops);
+
+ HBL_CN_DEBUGFS_CREATE_FILE(NIC_WQE_INDEX_CHECKER, 0644, root_dir, hdev,
+ &debugfs_wqe_index_checker_fops);
+
+ HBL_CN_DEBUGFS_CREATE_FILE(NIC_ACCUMULATE_FEC_DURATION, 0644, root_dir, hdev,
+ &debugfs_accumulate_fec_duration_fops);
+
+ HBL_CN_DEBUGFS_CREATE_U8(NIC_PHY_FORCE_FIRST_TX_TAPS_CFG, 0644, root_dir,
+ &hdev->phy_force_first_tx_taps_cfg);
+}
+
+void hbl_cn_debugfs_dev_init(struct hbl_cn_device *hdev)
+{
+ char name[64] = {0};
+
+ snprintf(name, sizeof(name), "hbl_cn%d", hdev->id);
+ hdev->cn_dentry = debugfs_create_dir(name, hbl_cn_debug_root);
+ __hbl_cn_debugfs_dev_init(hdev, hdev->cn_dentry);
+}
+
+void hbl_cn_debugfs_dev_fini(struct hbl_cn_device *hdev)
+{
+ debugfs_remove_recursive(hdev->cn_dentry);
+}
+
+void __init hbl_cn_debugfs_init(void)
+{
+ hbl_cn_debug_root = debugfs_create_dir(module_name(THIS_MODULE), NULL);
+}
+
+void hbl_cn_debugfs_fini(void)
+{
+ debugfs_remove_recursive(hbl_cn_debug_root);
+}
+
+#else
+
+void hbl_cn_debugfs_dev_init(struct hbl_cn_device *hdev)
+{
+}
+
+void hbl_cn_debugfs_dev_fini(struct hbl_cn_device *hdev)
+{
+}
+
+void __init hbl_cn_debugfs_init(void)
+{
+}
+
+void hbl_cn_debugfs_fini(void)
+{
+}
+
+#endif /* CONFIG_DEBUG_FS */
diff --git a/drivers/net/ethernet/intel/hbl_cn/common/hbl_cn_drv.c b/drivers/net/ethernet/intel/hbl_cn/common/hbl_cn_drv.c
index 5ea690509592..1a26d9f3b9a4 100644
--- a/drivers/net/ethernet/intel/hbl_cn/common/hbl_cn_drv.c
+++ b/drivers/net/ethernet/intel/hbl_cn/common/hbl_cn_drv.c
@@ -207,15 +207,32 @@ static struct auxiliary_driver hbl_cn_driver = {

static int __init hbl_cn_init(void)
{
+ int rc;
+
pr_info("loading driver\n");

- return auxiliary_driver_register(&hbl_cn_driver);
+ hbl_cn_debugfs_init();
+
+ rc = auxiliary_driver_register(&hbl_cn_driver);
+ if (rc) {
+ pr_err("Failed to register auxiliary driver\n");
+ goto remove_debugfs;
+ }
+
+ return 0;
+
+remove_debugfs:
+ hbl_cn_debugfs_fini();
+
+ return rc;
}

static void __exit hbl_cn_exit(void)
{
auxiliary_driver_unregister(&hbl_cn_driver);

+ hbl_cn_debugfs_fini();
+
pr_info("driver removed\n");
}

--
2.34.1