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Message-Id: <1509137654-1580-7-git-send-email-steven.lin1@broadcom.com>
Date: Fri, 27 Oct 2017 16:54:10 -0400
From: Steve Lin <steven.lin1@...adcom.com>
To: netdev@...r.kernel.org
Cc: jiri@...lanox.com, davem@...emloft.net, michael.chan@...adcom.com,
linville@...driver.com, gospo@...adcom.com, yuvalm@...lanox.com,
steven.lin1@...adcom.com
Subject: [PATCH net-next v4 06/10] bnxt: Add devlink support for config get/set
Implements get and set of configuration parameters using new devlink
config get/set API. Parameters themselves defined in later patches.
Signed-off-by: Steve Lin <steven.lin1@...adcom.com>
Acked-by: Andy Gospodarek <gospo@...adcom.com>
---
drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c | 258 +++++++++++++++++++++-
drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.h | 17 ++
2 files changed, 263 insertions(+), 12 deletions(-)
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c
index 402fa32..8a6037f 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c
@@ -14,26 +14,260 @@
#include "bnxt_vfr.h"
#include "bnxt_devlink.h"
-static const struct devlink_ops bnxt_dl_ops = {
-#ifdef CONFIG_BNXT_SRIOV
- .eswitch_mode_set = bnxt_dl_eswitch_mode_set,
- .eswitch_mode_get = bnxt_dl_eswitch_mode_get,
-#endif /* CONFIG_BNXT_SRIOV */
+struct bnxt_drv_cfgparam bnxt_drv_cfgparam_list[] = {
};
-int bnxt_dl_register(struct bnxt *bp)
+#define BNXT_NUM_DRV_CFGPARAM ARRAY_SIZE(bnxt_drv_cfgparam_list)
+
+static int bnxt_nvm_read(struct bnxt *bp, int nvm_param, int idx,
+ void *buf, int size)
{
- struct devlink *dl;
+ struct hwrm_nvm_get_variable_input req = {0};
+ dma_addr_t dest_data_dma_addr;
+ void *dest_data_addr = NULL;
+ int bytesize;
int rc;
- if (!pci_find_ext_capability(bp->pdev, PCI_EXT_CAP_ID_SRIOV))
- return 0;
+ bytesize = roundup(size, BITS_PER_BYTE) / BITS_PER_BYTE;
+ dest_data_addr = dma_alloc_coherent(&bp->pdev->dev, bytesize,
+ &dest_data_dma_addr, GFP_KERNEL);
+ if (!dest_data_addr)
+ return -ENOMEM;
+
+ bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_NVM_GET_VARIABLE, -1, -1);
+ req.dest_data_addr = cpu_to_le64(dest_data_dma_addr);
+ req.data_len = cpu_to_le16(size);
+ req.option_num = cpu_to_le16(nvm_param);
+ req.index_0 = cpu_to_le16(idx);
+ if (idx != 0)
+ req.dimensions = cpu_to_le16(1);
+
+ rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
+
+ memcpy(buf, dest_data_addr, bytesize);
+
+ dma_free_coherent(&bp->pdev->dev, bytesize, dest_data_addr,
+ dest_data_dma_addr);
+
+ return rc;
+}
+
+static int bnxt_nvm_write(struct bnxt *bp, int nvm_param, int idx,
+ const void *buf, int size)
+{
+ struct hwrm_nvm_set_variable_input req = {0};
+ dma_addr_t src_data_dma_addr;
+ void *src_data_addr = NULL;
+ int bytesize;
+ int rc;
+
+ bytesize = roundup(size, BITS_PER_BYTE) / BITS_PER_BYTE;
+
+ src_data_addr = dma_alloc_coherent(&bp->pdev->dev, bytesize,
+ &src_data_dma_addr, GFP_KERNEL);
+ if (!src_data_addr)
+ return -ENOMEM;
+
+ memcpy(src_data_addr, buf, bytesize);
+
+ bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_NVM_SET_VARIABLE, -1, -1);
+ req.src_data_addr = cpu_to_le64(src_data_dma_addr);
+ req.data_len = cpu_to_le16(size);
+ req.option_num = cpu_to_le16(nvm_param);
+ req.index_0 = cpu_to_le16(idx);
+ if (idx != 0)
+ req.dimensions = cpu_to_le16(1);
+
+ rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
+
+ dma_free_coherent(&bp->pdev->dev, bytesize, src_data_addr,
+ src_data_dma_addr);
- if (bp->hwrm_spec_code < 0x10803) {
- netdev_warn(bp->dev, "Firmware does not support SR-IOV E-Switch SWITCHDEV mode.\n");
- return -ENOTSUPP;
+ return 0;
+}
+
+static int bnxt_dl_perm_config_set(struct devlink *devlink,
+ enum devlink_perm_config_param param,
+ u8 type,
+ union devlink_perm_config_value *value,
+ u8 *restart_reqd)
+{
+ struct bnxt *bp = bnxt_get_bp_from_dl(devlink);
+ struct bnxt_drv_cfgparam *entry = NULL;
+ u32 value_int;
+ u32 bytesize;
+ int idx = 0;
+ int ret = 0;
+ u16 val16;
+ u8 val8;
+ int i;
+
+ *restart_reqd = 0;
+
+ /* Find parameter in table */
+ for (i = 0; i < BNXT_NUM_DRV_CFGPARAM; i++) {
+ if (param == bnxt_drv_cfgparam_list[i].param) {
+ entry = &bnxt_drv_cfgparam_list[i];
+ break;
+ }
+ }
+
+ /* Not found */
+ if (!entry)
+ return -EINVAL;
+
+ /* Check to see if this func type can access variable */
+ if (BNXT_PF(bp) && !(entry->func & BNXT_DRV_PF))
+ return -EOPNOTSUPP;
+ if (BNXT_VF(bp) && !(entry->func & BNXT_DRV_VF))
+ return -EOPNOTSUPP;
+
+ /* If parameter is per port or function, compute index */
+ if (entry->appl == BNXT_DRV_APPL_PORT) {
+ idx = bp->pf.port_id;
+ } else if (entry->appl == BNXT_DRV_APPL_FUNCTION) {
+ if (BNXT_PF(bp))
+ idx = bp->pf.fw_fid - BNXT_FIRST_PF_FID;
}
+ bytesize = roundup(entry->bitlength, BITS_PER_BYTE) / BITS_PER_BYTE;
+
+ /* Type expected by device may or may not be the same as type passed
+ * in from devlink API. So first convert to an interval u32 value,
+ * then to type needed by device.
+ */
+ if (type == NLA_U8) {
+ value_int = value->value8;
+ } else if (type == NLA_U16) {
+ value_int = value->value16;
+ } else if (type == NLA_U32) {
+ value_int = value->value32;
+ } else {
+ /* Unsupported type */
+ return -EINVAL;
+ }
+
+ if (bytesize == 1) {
+ val8 = value_int;
+ ret = bnxt_nvm_write(bp, entry->nvm_param, idx, &val8,
+ entry->bitlength);
+ } else if (bytesize == 2) {
+ val16 = value_int;
+ ret = bnxt_nvm_write(bp, entry->nvm_param, idx, &val16,
+ entry->bitlength);
+ } else {
+ ret = bnxt_nvm_write(bp, entry->nvm_param, idx, &value_int,
+ entry->bitlength);
+ }
+
+ /* Restart required for all nvm parameter writes */
+ *restart_reqd = 1;
+
+ return ret;
+}
+
+static int bnxt_dl_perm_config_get(struct devlink *devlink,
+ enum devlink_perm_config_param param,
+ u8 type,
+ union devlink_perm_config_value *value)
+{
+ struct bnxt *bp = bnxt_get_bp_from_dl(devlink);
+ struct bnxt_drv_cfgparam *entry = NULL;
+ u32 value_int;
+ u32 bytesize;
+ int idx = 0;
+ int err = 0;
+ void *data;
+ u16 val16;
+ u8 val8;
+ int i;
+
+ /* Find parameter in table */
+ for (i = 0; i < BNXT_NUM_DRV_CFGPARAM; i++) {
+ if (param == bnxt_drv_cfgparam_list[i].param) {
+ entry = &bnxt_drv_cfgparam_list[i];
+ break;
+ }
+ }
+
+ /* Not found */
+ if (!entry)
+ return -EINVAL;
+
+ /* Check to see if this func type can access variable */
+ if (BNXT_PF(bp) && !(entry->func & BNXT_DRV_PF))
+ return -EOPNOTSUPP;
+ if (BNXT_VF(bp) && !(entry->func & BNXT_DRV_VF))
+ return -EOPNOTSUPP;
+
+ /* If parameter is per port or function, compute index */
+ if (entry->appl == BNXT_DRV_APPL_PORT) {
+ idx = bp->pf.port_id;
+ } else if (entry->appl == BNXT_DRV_APPL_FUNCTION) {
+ if (BNXT_PF(bp))
+ idx = bp->pf.fw_fid - BNXT_FIRST_PF_FID;
+ }
+
+ /* Allocate space, retrieve value, and copy to result */
+ bytesize = roundup(entry->bitlength, BITS_PER_BYTE) / BITS_PER_BYTE;
+ data = kmalloc(bytesize, GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+ err = bnxt_nvm_read(bp, entry->nvm_param, idx, data, entry->bitlength);
+ if (err)
+ goto err_data;
+
+ /* Type returned by device may or may not be the same as type expected
+ * by devlink API. So first convert to an interval u32 value, then to
+ * type expected by devlink.
+ */
+ if (bytesize == 1) {
+ memcpy(&val8, data, sizeof(val8));
+ value_int = val8;
+ } else if (bytesize == 2) {
+ memcpy(&val16, data, sizeof(val16));
+ value_int = val16;
+ } else {
+ memcpy(&value_int, data, sizeof(value_int));
+ }
+
+ if (type == NLA_U8) {
+ value->value8 = value_int;
+ } else if (type == NLA_U16) {
+ value->value16 = value_int;
+ } else if (type == NLA_U32) {
+ value->value32 = value_int;
+ } else {
+ /* Unsupported type */
+ err = -EINVAL;
+ }
+
+err_data:
+ kfree(data);
+
+ return err;
+}
+
+static struct devlink_ops bnxt_dl_ops = {
+ .perm_config_get = bnxt_dl_perm_config_get,
+ .perm_config_set = bnxt_dl_perm_config_set,
+};
+
+int bnxt_dl_register(struct bnxt *bp)
+{
+ struct devlink *dl;
+ int rc;
+
+#ifdef CONFIG_BNXT_SRIOV
+ /* Add switchdev eswitch mode setting if SRIOV supported */
+ if (pci_find_ext_capability(bp->pdev, PCI_EXT_CAP_ID_SRIOV) &&
+ bp->hwrm_spec_code >= 0x10800) {
+ bnxt_dl_ops.eswitch_mode_set = bnxt_dl_eswitch_mode_set;
+ bnxt_dl_ops.eswitch_mode_get = bnxt_dl_eswitch_mode_get;
+ } else
+#endif /* CONFIG_BNXT_SRIOV */
+ netdev_warn(bp->dev, "SR-IOV E-Switch SWITCHDEV mode not supported.\n");
+
dl = devlink_alloc(&bnxt_dl_ops, sizeof(struct bnxt_dl));
if (!dl) {
netdev_warn(bp->dev, "devlink_alloc failed");
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.h b/drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.h
index e92a35d..d843a81 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.h
@@ -10,6 +10,23 @@
#ifndef BNXT_DEVLINK_H
#define BNXT_DEVLINK_H
+#define BNXT_DRV_PF 1
+#define BNXT_DRV_VF 2
+
+enum bnxt_drv_appl {
+ BNXT_DRV_APPL_SHARED,
+ BNXT_DRV_APPL_PORT,
+ BNXT_DRV_APPL_FUNCTION
+};
+
+struct bnxt_drv_cfgparam {
+ enum devlink_perm_config_param param;
+ u8 func; /* BNXT_DRV_PF | BNXT_DRV_VF */
+ enum bnxt_drv_appl appl; /* applicability (shared, func, port) */
+ u32 bitlength; /* length, in bits */
+ u32 nvm_param;
+};
+
/* Struct to hold housekeeping info needed by devlink interface */
struct bnxt_dl {
struct bnxt *bp; /* back ptr to the controlling dev */
--
2.7.4
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