Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 175 insertions, 0 deletions

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c
new file mode 100644
index 000000000..b178c2e9d
--- /dev/null
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c
@@ -0,0 +1,175 @@
+/* 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);
+}