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/* Broadcom NetXtreme-C/E network driver.
*
* Copyright (c) 2017 Broadcom Limited
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation.
*/
#include <linux/pci.h>
#include <linux/netdevice.h>
#include "bnxt_hsi.h"
#include "bnxt.h"
#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 */
};
static const struct bnxt_dl_nvm_param nvm_params[] = {
{DEVLINK_PARAM_GENERIC_ID_ENABLE_SRIOV, NVM_OFF_ENABLE_SRIOV,
BNXT_NVM_SHARED_CFG, 1},
};
static int bnxt_hwrm_nvm_req(struct bnxt *bp, u32 param_id, void *msg,
int msg_len, union devlink_param_value *val)
{
struct hwrm_nvm_get_variable_input *req = msg;
void *data_addr = NULL, *buf = NULL;
struct bnxt_dl_nvm_param nvm_param;
int bytesize, idx = 0, rc, i;
dma_addr_t data_dma_addr;
/* Get/Set NVM CFG parameter is supported only on PFs */
if (BNXT_VF(bp))
return -EPERM;
for (i = 0; i < ARRAY_SIZE(nvm_params); i++) {
if (nvm_params[i].id == param_id) {
nvm_param = nvm_params[i];
break;
}
}
if (i == ARRAY_SIZE(nvm_params))
return -EOPNOTSUPP;
if (nvm_param.dir_type == BNXT_NVM_PORT_CFG)
idx = bp->pf.port_id;
else if (nvm_param.dir_type == BNXT_NVM_FUNC_CFG)
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;
data_addr = dma_zalloc_coherent(&bp->pdev->dev, bytesize,
&data_dma_addr, GFP_KERNEL);
if (!data_addr)
return -ENOMEM;
req->dest_data_addr = cpu_to_le64(data_dma_addr);
req->data_len = cpu_to_le16(nvm_param.num_bits);
req->option_num = cpu_to_le16(nvm_param.offset);
req->index_0 = cpu_to_le16(idx);
if (idx)
req->dimensions = cpu_to_le16(1);
if (req->req_type == cpu_to_le16(HWRM_NVM_SET_VARIABLE))
memcpy(data_addr, buf, bytesize);
rc = hwrm_send_message(bp, msg, msg_len, HWRM_CMD_TIMEOUT);
if (!rc && req->req_type == cpu_to_le16(HWRM_NVM_GET_VARIABLE))
memcpy(buf, data_addr, bytesize);
dma_free_coherent(&bp->pdev->dev, bytesize, data_addr, data_dma_addr);
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;
}
static int bnxt_dl_nvm_param_get(struct devlink *dl, u32 id,
struct devlink_param_gset_ctx *ctx)
{
struct hwrm_nvm_get_variable_input req = {0};
struct bnxt *bp = bnxt_get_bp_from_dl(dl);
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);
}
static int bnxt_dl_nvm_param_set(struct devlink *dl, u32 id,
struct devlink_param_gset_ctx *ctx)
{
struct hwrm_nvm_set_variable_input req = {0};
struct bnxt *bp = bnxt_get_bp_from_dl(dl);
bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_NVM_SET_VARIABLE, -1, -1);
return bnxt_hwrm_nvm_req(bp, id, &req, sizeof(req), &ctx->val);
}
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),
};
int bnxt_dl_register(struct bnxt *bp)
{
struct devlink *dl;
int rc;
if (bp->hwrm_spec_code < 0x10600) {
netdev_warn(bp->dev, "Firmware does not support NVM params");
return -ENOTSUPP;
}
dl = devlink_alloc(&bnxt_dl_ops, sizeof(struct bnxt_dl));
if (!dl) {
netdev_warn(bp->dev, "devlink_alloc failed");
return -ENOMEM;
}
bnxt_link_bp_to_dl(bp, dl);
/* Add switchdev eswitch mode setting, if SRIOV supported */
if (pci_find_ext_capability(bp->pdev, PCI_EXT_CAP_ID_SRIOV) &&
bp->hwrm_spec_code > 0x10803)
bp->eswitch_mode = DEVLINK_ESWITCH_MODE_LEGACY;
rc = devlink_register(dl, &bp->pdev->dev);
if (rc) {
netdev_warn(bp->dev, "devlink_register failed. rc=%d", rc);
goto err_dl_free;
}
rc = devlink_params_register(dl, bnxt_dl_params,
ARRAY_SIZE(bnxt_dl_params));
if (rc) {
netdev_warn(bp->dev, "devlink_params_register failed. rc=%d",
rc);
goto err_dl_unreg;
}
return 0;
err_dl_unreg:
devlink_unregister(dl);
err_dl_free:
bnxt_link_bp_to_dl(bp, NULL);
devlink_free(dl);
return rc;
}
void bnxt_dl_unregister(struct bnxt *bp)
{
struct devlink *dl = bp->dl;
if (!dl)
return;
devlink_params_unregister(dl, bnxt_dl_params,
ARRAY_SIZE(bnxt_dl_params));
devlink_unregister(dl);
devlink_free(dl);
}
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