Merge branch 'bnxt_en-devlink-param-updates'

Vasundhara Volam says:

====================
bnxt_en: devlink param updates

This patchset adds support for 3 generic and 1 driver-specific devlink
parameters. Add documentation for these configuration parameters.

Also, this patchset adds support to return proper error code if
HWRM_NVM_GET/SET_VARIABLE commands return error code
HWRM_ERR_CODE_RESOURCE_ACCESS_DENIED.

v3->v4:
-Remove extra definition of NVM_OFF_HW_TC_OFFLOAD from bnxt_devlink.h
-Remove type information for generic parameters from
devlink-params-bnxt.txt

v2->v3:
-Remove description of generic parameters from devlink-params-bnxt.txt

v1->v2:
-Remove hw_tc_offload parameter.
-Update all patches with Cc of MAINTAINERS.
-Add more description in commit message for device specific parameter.
-Add a new Documentation/networking/devlink-params.txt with some
generic devlink parameters information.
-Add a new Documentation/networking/devlink-params-bnxt.txt with devlink
parameters information that are supported by bnxt_en driver.
====================

Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

6 files changed, 176 insertions, 4 deletions

diff --git a/Documentation/networking/devlink-params-bnxt.txt b/Documentation/networking/devlink-params-bnxt.txt
new file mode 100644
index 000000000000..481aa303d5b4
--- /dev/null
+++ b/Documentation/networking/devlink-params-bnxt.txt
@@ -0,0 +1,18 @@
+enable_sriov		[DEVICE, GENERIC]
+			Configuration mode: Permanent
+
+ignore_ari		[DEVICE, GENERIC]
+			Configuration mode: Permanent
+
+msix_vec_per_pf_max	[DEVICE, GENERIC]
+			Configuration mode: Permanent
+
+msix_vec_per_pf_min	[DEVICE, GENERIC]
+			Configuration mode: Permanent
+
+gre_ver_check		[DEVICE, DRIVER-SPECIFIC]
+			Generic Routing Encapsulation (GRE) version check will
+			be enabled in the device. If disabled, device skips
+			version checking for incoming packets.
+			Type: Boolean
+			Configuration mode: Permanent
diff --git a/Documentation/networking/devlink-params.txt b/Documentation/networking/devlink-params.txt
new file mode 100644
index 000000000000..ae444ffe73ac
--- /dev/null
+++ b/Documentation/networking/devlink-params.txt
@@ -0,0 +1,42 @@
+Devlink configuration parameters
+================================
+Following is the list of configuration parameters via devlink interface.
+Each parameter can be generic or driver specific and are device level
+parameters.
+
+Note that the driver-specific files should contain the generic params
+they support to, with supported config modes.
+
+Each parameter can be set in different configuration modes:
+	runtime		- set while driver is running, no reset required.
+	driverinit	- applied while driver initializes, requires restart
+			driver by devlink reload command.
+	permanent	- written to device's non-volatile memory, hard reset
+			required.
+
+Following is the list of parameters:
+====================================
+enable_sriov		[DEVICE, GENERIC]
+			Enable Single Root I/O Virtualisation (SRIOV) in
+			the device.
+			Type: Boolean
+
+ignore_ari		[DEVICE, GENERIC]
+			Ignore Alternative Routing-ID Interpretation (ARI)
+			capability. If enabled, adapter will ignore ARI
+			capability even when platforms has the support
+			enabled and creates same number of partitions when
+			platform does not support ARI.
+			Type: Boolean
+
+msix_vec_per_pf_max	[DEVICE, GENERIC]
+			Provides the maximum number of MSIX interrupts that
+			a device can create. Value is same across all
+			physical functions (PFs) in the device.
+			Type: u32
+
+msix_vec_per_pf_min	[DEVICE, GENERIC]
+			Provides the minimum number of MSIX interrupts required
+			for the device initialization. Value is same across all
+			physical functions (PFs) in the device.
+			Type: u32
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c
index 790c684f08ab..8a10e01f0861 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c
@@ -21,9 +21,22 @@ static const struct devlink_ops bnxt_dl_ops = {
 #endif /* CONFIG_BNXT_SRIOV */
 };
 
+enum bnxt_dl_param_id {
+	BNXT_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX,
+	BNXT_DEVLINK_PARAM_ID_GRE_VER_CHECK,
+};
+
 static const struct bnxt_dl_nvm_param nvm_params[] = {
 	{DEVLINK_PARAM_GENERIC_ID_ENABLE_SRIOV, NVM_OFF_ENABLE_SRIOV,
 	 BNXT_NVM_SHARED_CFG, 1},
+	{DEVLINK_PARAM_GENERIC_ID_IGNORE_ARI, NVM_OFF_IGNORE_ARI,
+	 BNXT_NVM_SHARED_CFG, 1},
+	{DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MAX,
+	 NVM_OFF_MSIX_VEC_PER_PF_MAX, BNXT_NVM_SHARED_CFG, 10},
+	{DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MIN,
+	 NVM_OFF_MSIX_VEC_PER_PF_MIN, BNXT_NVM_SHARED_CFG, 7},
+	{BNXT_DEVLINK_PARAM_ID_GRE_VER_CHECK, NVM_OFF_DIS_GRE_VER_CHECK,
+	 BNXT_NVM_SHARED_CFG, 1},
 };
 
 static int bnxt_hwrm_nvm_req(struct bnxt *bp, u32 param_id, void *msg,
@@ -55,8 +68,22 @@ static int bnxt_hwrm_nvm_req(struct bnxt *bp, u32 param_id, void *msg,
 		idx = bp->pf.fw_fid - BNXT_FIRST_PF_FID;
 
 	bytesize = roundup(nvm_param.num_bits, BITS_PER_BYTE) / BITS_PER_BYTE;
-	if (nvm_param.num_bits == 1)
-		buf = &val->vbool;
+	switch (bytesize) {
+	case 1:
+		if (nvm_param.num_bits == 1)
+			buf = &val->vbool;
+		else
+			buf = &val->vu8;
+		break;
+	case 2:
+		buf = &val->vu16;
+		break;
+	case 4:
+		buf = &val->vu32;
+		break;
+	default:
+		return -EFAULT;
+	}
 
 	data_addr = dma_zalloc_coherent(&bp->pdev->dev, bytesize,
 					&data_dma_addr, GFP_KERNEL);
@@ -78,8 +105,12 @@ static int bnxt_hwrm_nvm_req(struct bnxt *bp, u32 param_id, void *msg,
 		memcpy(buf, data_addr, bytesize);
 
 	dma_free_coherent(&bp->pdev->dev, bytesize, data_addr, data_dma_addr);
-	if (rc)
+	if (rc == HWRM_ERR_CODE_RESOURCE_ACCESS_DENIED) {
+		netdev_err(bp->dev, "PF does not have admin privileges to modify NVM config\n");
+		return -EACCES;
+	} else if (rc) {
 		return -EIO;
+	}
 	return 0;
 }
 
@@ -88,9 +119,15 @@ static int bnxt_dl_nvm_param_get(struct devlink *dl, u32 id,
 {
 	struct hwrm_nvm_get_variable_input req = {0};
 	struct bnxt *bp = bnxt_get_bp_from_dl(dl);
+	int rc;
 
 	bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_NVM_GET_VARIABLE, -1, -1);
-	return bnxt_hwrm_nvm_req(bp, id, &req, sizeof(req), &ctx->val);
+	rc = bnxt_hwrm_nvm_req(bp, id, &req, sizeof(req), &ctx->val);
+	if (!rc)
+		if (id == BNXT_DEVLINK_PARAM_ID_GRE_VER_CHECK)
+			ctx->val.vbool = !ctx->val.vbool;
+
+	return rc;
 }
 
 static int bnxt_dl_nvm_param_set(struct devlink *dl, u32 id,
@@ -100,14 +137,55 @@ static int bnxt_dl_nvm_param_set(struct devlink *dl, u32 id,
 	struct bnxt *bp = bnxt_get_bp_from_dl(dl);
 
 	bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_NVM_SET_VARIABLE, -1, -1);
+
+	if (id == BNXT_DEVLINK_PARAM_ID_GRE_VER_CHECK)
+		ctx->val.vbool = !ctx->val.vbool;
+
 	return bnxt_hwrm_nvm_req(bp, id, &req, sizeof(req), &ctx->val);
 }
 
+static int bnxt_dl_msix_validate(struct devlink *dl, u32 id,
+				 union devlink_param_value val,
+				 struct netlink_ext_ack *extack)
+{
+	int max_val;
+
+	if (id == DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MAX)
+		max_val = BNXT_MSIX_VEC_MAX;
+
+	if (id == DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MIN)
+		max_val = BNXT_MSIX_VEC_MIN_MAX;
+
+	if (val.vu32 < 0 || val.vu32 > max_val) {
+		NL_SET_ERR_MSG_MOD(extack, "MSIX value is exceeding the range");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
 static const struct devlink_param bnxt_dl_params[] = {
 	DEVLINK_PARAM_GENERIC(ENABLE_SRIOV,
 			      BIT(DEVLINK_PARAM_CMODE_PERMANENT),
 			      bnxt_dl_nvm_param_get, bnxt_dl_nvm_param_set,
 			      NULL),
+	DEVLINK_PARAM_GENERIC(IGNORE_ARI,
+			      BIT(DEVLINK_PARAM_CMODE_PERMANENT),
+			      bnxt_dl_nvm_param_get, bnxt_dl_nvm_param_set,
+			      NULL),
+	DEVLINK_PARAM_GENERIC(MSIX_VEC_PER_PF_MAX,
+			      BIT(DEVLINK_PARAM_CMODE_PERMANENT),
+			      bnxt_dl_nvm_param_get, bnxt_dl_nvm_param_set,
+			      bnxt_dl_msix_validate),
+	DEVLINK_PARAM_GENERIC(MSIX_VEC_PER_PF_MIN,
+			      BIT(DEVLINK_PARAM_CMODE_PERMANENT),
+			      bnxt_dl_nvm_param_get, bnxt_dl_nvm_param_set,
+			      bnxt_dl_msix_validate),
+	DEVLINK_PARAM_DRIVER(BNXT_DEVLINK_PARAM_ID_GRE_VER_CHECK,
+			     "gre_ver_check", DEVLINK_PARAM_TYPE_BOOL,
+			     BIT(DEVLINK_PARAM_CMODE_PERMANENT),
+			     bnxt_dl_nvm_param_get, bnxt_dl_nvm_param_set,
+			     NULL),
 };
 
 int bnxt_dl_register(struct bnxt *bp)
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.h b/drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.h
index 2f68dc048390..5b6b2c7d97cf 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.h
@@ -33,8 +33,15 @@ static inline void bnxt_link_bp_to_dl(struct bnxt *bp, struct devlink *dl)
 	}
 }
 
+#define NVM_OFF_MSIX_VEC_PER_PF_MAX	108
+#define NVM_OFF_MSIX_VEC_PER_PF_MIN	114
+#define NVM_OFF_IGNORE_ARI		164
+#define NVM_OFF_DIS_GRE_VER_CHECK	171
 #define NVM_OFF_ENABLE_SRIOV		401
 
+#define BNXT_MSIX_VEC_MAX	1280
+#define BNXT_MSIX_VEC_MIN_MAX	128
+
 enum bnxt_nvm_dir_type {
 	BNXT_NVM_SHARED_CFG = 40,
 	BNXT_NVM_PORT_CFG,
diff --git a/include/net/devlink.h b/include/net/devlink.h
index 70671f0d4c30..9a70755ad1c2 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -362,6 +362,9 @@ enum devlink_param_generic_id {
 	DEVLINK_PARAM_GENERIC_ID_MAX_MACS,
 	DEVLINK_PARAM_GENERIC_ID_ENABLE_SRIOV,
 	DEVLINK_PARAM_GENERIC_ID_REGION_SNAPSHOT,
+	DEVLINK_PARAM_GENERIC_ID_IGNORE_ARI,
+	DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MAX,
+	DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MIN,
 
 	/* add new param generic ids above here*/
 	__DEVLINK_PARAM_GENERIC_ID_MAX,
@@ -380,6 +383,15 @@ enum devlink_param_generic_id {
 #define DEVLINK_PARAM_GENERIC_REGION_SNAPSHOT_NAME "region_snapshot_enable"
 #define DEVLINK_PARAM_GENERIC_REGION_SNAPSHOT_TYPE DEVLINK_PARAM_TYPE_BOOL
 
+#define DEVLINK_PARAM_GENERIC_IGNORE_ARI_NAME "ignore_ari"
+#define DEVLINK_PARAM_GENERIC_IGNORE_ARI_TYPE DEVLINK_PARAM_TYPE_BOOL
+
+#define DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MAX_NAME "msix_vec_per_pf_max"
+#define DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MAX_TYPE DEVLINK_PARAM_TYPE_U32
+
+#define DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MIN_NAME "msix_vec_per_pf_min"
+#define DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MIN_TYPE DEVLINK_PARAM_TYPE_U32
+
 #define DEVLINK_PARAM_GENERIC(_id, _cmodes, _get, _set, _validate)	\
 {									\
 	.id = DEVLINK_PARAM_GENERIC_ID_##_id,				\
diff --git a/net/core/devlink.c b/net/core/devlink.c
index de6adad7ccbe..938f68ee92f0 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -2677,6 +2677,21 @@ static const struct devlink_param devlink_param_generic[] = {
 		.name = DEVLINK_PARAM_GENERIC_REGION_SNAPSHOT_NAME,
 		.type = DEVLINK_PARAM_GENERIC_REGION_SNAPSHOT_TYPE,
 	},
+	{
+		.id = DEVLINK_PARAM_GENERIC_ID_IGNORE_ARI,
+		.name = DEVLINK_PARAM_GENERIC_IGNORE_ARI_NAME,
+		.type = DEVLINK_PARAM_GENERIC_IGNORE_ARI_TYPE,
+	},
+	{
+		.id = DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MAX,
+		.name = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MAX_NAME,
+		.type = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MAX_TYPE,
+	},
+	{
+		.id = DEVLINK_PARAM_GENERIC_ID_MSIX_VEC_PER_PF_MIN,
+		.name = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MIN_NAME,
+		.type = DEVLINK_PARAM_GENERIC_MSIX_VEC_PER_PF_MIN_TYPE,
+	},
 };
 
 static int devlink_param_generic_verify(const struct devlink_param *param)