1 files changed, 438 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/ice/ice_vlan_mode.c b/drivers/net/ethernet/intel/ice/ice_vlan_mode.c
new file mode 100644
index 000000000000..bcda2e004807
--- /dev/null
+++ b/drivers/net/ethernet/intel/ice/ice_vlan_mode.c
@@ -0,0 +1,438 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (C) 2019-2021, Intel Corporation. */
+
+#include "ice_common.h"
+
+/**
+ * ice_pkg_get_supported_vlan_mode - determine if DDP supports Double VLAN mode
+ * @hw: pointer to the HW struct
+ * @dvm: output variable to determine if DDP supports DVM(true) or SVM(false)
+ */
+static int
+ice_pkg_get_supported_vlan_mode(struct ice_hw *hw, bool *dvm)
+{
+	u16 meta_init_size = sizeof(struct ice_meta_init_section);
+	struct ice_meta_init_section *sect;
+	struct ice_buf_build *bld;
+	int status;
+
+	/* if anything fails, we assume there is no DVM support */
+	*dvm = false;
+
+	bld = ice_pkg_buf_alloc_single_section(hw,
+					       ICE_SID_RXPARSER_METADATA_INIT,
+					       meta_init_size, (void **)&sect);
+	if (!bld)
+		return -ENOMEM;
+
+	/* only need to read a single section */
+	sect->count = cpu_to_le16(1);
+	sect->offset = cpu_to_le16(ICE_META_VLAN_MODE_ENTRY);
+
+	status = ice_aq_upload_section(hw,
+				       (struct ice_buf_hdr *)ice_pkg_buf(bld),
+				       ICE_PKG_BUF_SIZE, NULL);
+	if (!status) {
+		DECLARE_BITMAP(entry, ICE_META_INIT_BITS);
+		u32 arr[ICE_META_INIT_DW_CNT];
+		u16 i;
+
+		/* convert to host bitmap format */
+		for (i = 0; i < ICE_META_INIT_DW_CNT; i++)
+			arr[i] = le32_to_cpu(sect->entry.bm[i]);
+
+		bitmap_from_arr32(entry, arr, (u16)ICE_META_INIT_BITS);
+
+		/* check if DVM is supported */
+		*dvm = test_bit(ICE_META_VLAN_MODE_BIT, entry);
+	}
+
+	ice_pkg_buf_free(hw, bld);
+
+	return status;
+}
+
+/**
+ * ice_aq_get_vlan_mode - get the VLAN mode of the device
+ * @hw: pointer to the HW structure
+ * @get_params: structure FW fills in based on the current VLAN mode config
+ *
+ * Get VLAN Mode Parameters (0x020D)
+ */
+static int
+ice_aq_get_vlan_mode(struct ice_hw *hw,
+		     struct ice_aqc_get_vlan_mode *get_params)
+{
+	struct ice_aq_desc desc;
+
+	if (!get_params)
+		return -EINVAL;
+
+	ice_fill_dflt_direct_cmd_desc(&desc,
+				      ice_aqc_opc_get_vlan_mode_parameters);
+
+	return ice_aq_send_cmd(hw, &desc, get_params, sizeof(*get_params),
+			       NULL);
+}
+
+/**
+ * ice_aq_is_dvm_ena - query FW to check if double VLAN mode is enabled
+ * @hw: pointer to the HW structure
+ *
+ * Returns true if the hardware/firmware is configured in double VLAN mode,
+ * else return false signaling that the hardware/firmware is configured in
+ * single VLAN mode.
+ *
+ * Also, return false if this call fails for any reason (i.e. firmware doesn't
+ * support this AQ call).
+ */
+static bool ice_aq_is_dvm_ena(struct ice_hw *hw)
+{
+	struct ice_aqc_get_vlan_mode get_params = { 0 };
+	int status;
+
+	status = ice_aq_get_vlan_mode(hw, &get_params);
+	if (status) {
+		ice_debug(hw, ICE_DBG_AQ, "Failed to get VLAN mode, status %d\n",
+			  status);
+		return false;
+	}
+
+	return (get_params.vlan_mode & ICE_AQ_VLAN_MODE_DVM_ENA);
+}
+
+/**
+ * ice_is_dvm_ena - check if double VLAN mode is enabled
+ * @hw: pointer to the HW structure
+ *
+ * The device is configured in single or double VLAN mode on initialization and
+ * this cannot be dynamically changed during runtime. Based on this there is no
+ * need to make an AQ call every time the driver needs to know the VLAN mode.
+ * Instead, use the cached VLAN mode.
+ */
+bool ice_is_dvm_ena(struct ice_hw *hw)
+{
+	return hw->dvm_ena;
+}
+
+/**
+ * ice_cache_vlan_mode - cache VLAN mode after DDP is downloaded
+ * @hw: pointer to the HW structure
+ *
+ * This is only called after downloading the DDP and after the global
+ * configuration lock has been released because all ports on a device need to
+ * cache the VLAN mode.
+ */
+static void ice_cache_vlan_mode(struct ice_hw *hw)
+{
+	hw->dvm_ena = ice_aq_is_dvm_ena(hw) ? true : false;
+}
+
+/**
+ * ice_pkg_supports_dvm - find out if DDP supports DVM
+ * @hw: pointer to the HW structure
+ */
+static bool ice_pkg_supports_dvm(struct ice_hw *hw)
+{
+	bool pkg_supports_dvm;
+	int status;
+
+	status = ice_pkg_get_supported_vlan_mode(hw, &pkg_supports_dvm);
+	if (status) {
+		ice_debug(hw, ICE_DBG_PKG, "Failed to get supported VLAN mode, status %d\n",
+			  status);
+		return false;
+	}
+
+	return pkg_supports_dvm;
+}
+
+/**
+ * ice_fw_supports_dvm - find out if FW supports DVM
+ * @hw: pointer to the HW structure
+ */
+static bool ice_fw_supports_dvm(struct ice_hw *hw)
+{
+	struct ice_aqc_get_vlan_mode get_vlan_mode = { 0 };
+	int status;
+
+	/* If firmware returns success, then it supports DVM, else it only
+	 * supports SVM
+	 */
+	status = ice_aq_get_vlan_mode(hw, &get_vlan_mode);
+	if (status) {
+		ice_debug(hw, ICE_DBG_NVM, "Failed to get VLAN mode, status %d\n",
+			  status);
+		return false;
+	}
+
+	return true;
+}
+
+/**
+ * ice_is_dvm_supported - check if Double VLAN Mode is supported
+ * @hw: pointer to the hardware structure
+ *
+ * Returns true if Double VLAN Mode (DVM) is supported and false if only Single
+ * VLAN Mode (SVM) is supported. In order for DVM to be supported the DDP and
+ * firmware must support it, otherwise only SVM is supported. This function
+ * should only be called while the global config lock is held and after the
+ * package has been successfully downloaded.
+ */
+static bool ice_is_dvm_supported(struct ice_hw *hw)
+{
+	if (!ice_pkg_supports_dvm(hw)) {
+		ice_debug(hw, ICE_DBG_PKG, "DDP doesn't support DVM\n");
+		return false;
+	}
+
+	if (!ice_fw_supports_dvm(hw)) {
+		ice_debug(hw, ICE_DBG_PKG, "FW doesn't support DVM\n");
+		return false;
+	}
+
+	return true;
+}
+
+#define ICE_EXTERNAL_VLAN_ID_FV_IDX			11
+#define ICE_SW_LKUP_VLAN_LOC_LKUP_IDX			1
+#define ICE_SW_LKUP_VLAN_PKT_FLAGS_LKUP_IDX		2
+#define ICE_SW_LKUP_PROMISC_VLAN_LOC_LKUP_IDX		2
+#define ICE_PKT_FLAGS_0_TO_15_FV_IDX			1
+static struct ice_update_recipe_lkup_idx_params ice_dvm_dflt_recipes[] = {
+	{
+		/* Update recipe ICE_SW_LKUP_VLAN to filter based on the
+		 * outer/single VLAN in DVM
+		 */
+		.rid = ICE_SW_LKUP_VLAN,
+		.fv_idx = ICE_EXTERNAL_VLAN_ID_FV_IDX,
+		.ignore_valid = true,
+		.mask = 0,
+		.mask_valid = false, /* use pre-existing mask */
+		.lkup_idx = ICE_SW_LKUP_VLAN_LOC_LKUP_IDX,
+	},
+	{
+		/* Update recipe ICE_SW_LKUP_VLAN to filter based on the VLAN
+		 * packet flags to support VLAN filtering on multiple VLAN
+		 * ethertypes (i.e. 0x8100 and 0x88a8) in DVM
+		 */
+		.rid = ICE_SW_LKUP_VLAN,
+		.fv_idx = ICE_PKT_FLAGS_0_TO_15_FV_IDX,
+		.ignore_valid = false,
+		.mask = ICE_PKT_FLAGS_0_TO_15_VLAN_FLAGS_MASK,
+		.mask_valid = true,
+		.lkup_idx = ICE_SW_LKUP_VLAN_PKT_FLAGS_LKUP_IDX,
+	},
+	{
+		/* Update recipe ICE_SW_LKUP_PROMISC_VLAN to filter based on the
+		 * outer/single VLAN in DVM
+		 */
+		.rid = ICE_SW_LKUP_PROMISC_VLAN,
+		.fv_idx = ICE_EXTERNAL_VLAN_ID_FV_IDX,
+		.ignore_valid = true,
+		.mask = 0,
+		.mask_valid = false,  /* use pre-existing mask */
+		.lkup_idx = ICE_SW_LKUP_PROMISC_VLAN_LOC_LKUP_IDX,
+	},
+};
+
+/**
+ * ice_dvm_update_dflt_recipes - update default switch recipes in DVM
+ * @hw: hardware structure used to update the recipes
+ */
+static int ice_dvm_update_dflt_recipes(struct ice_hw *hw)
+{
+	unsigned long i;
+
+	for (i = 0; i < ARRAY_SIZE(ice_dvm_dflt_recipes); i++) {
+		struct ice_update_recipe_lkup_idx_params *params;
+		int status;
+
+		params = &ice_dvm_dflt_recipes[i];
+
+		status = ice_update_recipe_lkup_idx(hw, params);
+		if (status) {
+			ice_debug(hw, ICE_DBG_INIT, "Failed to update RID %d lkup_idx %d fv_idx %d mask_valid %s mask 0x%04x\n",
+				  params->rid, params->lkup_idx, params->fv_idx,
+				  params->mask_valid ? "true" : "false",
+				  params->mask);
+			return status;
+		}
+	}
+
+	return 0;
+}
+
+/**
+ * ice_aq_set_vlan_mode - set the VLAN mode of the device
+ * @hw: pointer to the HW structure
+ * @set_params: requested VLAN mode configuration
+ *
+ * Set VLAN Mode Parameters (0x020C)
+ */
+static int
+ice_aq_set_vlan_mode(struct ice_hw *hw,
+		     struct ice_aqc_set_vlan_mode *set_params)
+{
+	u8 rdma_packet, mng_vlan_prot_id;
+	struct ice_aq_desc desc;
+
+	if (!set_params)
+		return -EINVAL;
+
+	if (set_params->l2tag_prio_tagging > ICE_AQ_VLAN_PRIO_TAG_MAX)
+		return -EINVAL;
+
+	rdma_packet = set_params->rdma_packet;
+	if (rdma_packet != ICE_AQ_SVM_VLAN_RDMA_PKT_FLAG_SETTING &&
+	    rdma_packet != ICE_AQ_DVM_VLAN_RDMA_PKT_FLAG_SETTING)
+		return -EINVAL;
+
+	mng_vlan_prot_id = set_params->mng_vlan_prot_id;
+	if (mng_vlan_prot_id != ICE_AQ_VLAN_MNG_PROTOCOL_ID_OUTER &&
+	    mng_vlan_prot_id != ICE_AQ_VLAN_MNG_PROTOCOL_ID_INNER)
+		return -EINVAL;
+
+	ice_fill_dflt_direct_cmd_desc(&desc,
+				      ice_aqc_opc_set_vlan_mode_parameters);
+	desc.flags |= cpu_to_le16(ICE_AQ_FLAG_RD);
+
+	return ice_aq_send_cmd(hw, &desc, set_params, sizeof(*set_params),
+			       NULL);
+}
+
+/**
+ * ice_set_dvm - sets up software and hardware for double VLAN mode
+ * @hw: pointer to the hardware structure
+ */
+static int ice_set_dvm(struct ice_hw *hw)
+{
+	struct ice_aqc_set_vlan_mode params = { 0 };
+	int status;
+
+	params.l2tag_prio_tagging = ICE_AQ_VLAN_PRIO_TAG_OUTER_CTAG;
+	params.rdma_packet = ICE_AQ_DVM_VLAN_RDMA_PKT_FLAG_SETTING;
+	params.mng_vlan_prot_id = ICE_AQ_VLAN_MNG_PROTOCOL_ID_OUTER;
+
+	status = ice_aq_set_vlan_mode(hw, &params);
+	if (status) {
+		ice_debug(hw, ICE_DBG_INIT, "Failed to set double VLAN mode parameters, status %d\n",
+			  status);
+		return status;
+	}
+
+	status = ice_dvm_update_dflt_recipes(hw);
+	if (status) {
+		ice_debug(hw, ICE_DBG_INIT, "Failed to update default recipes for double VLAN mode, status %d\n",
+			  status);
+		return status;
+	}
+
+	status = ice_aq_set_port_params(hw->port_info, true, NULL);
+	if (status) {
+		ice_debug(hw, ICE_DBG_INIT, "Failed to set port in double VLAN mode, status %d\n",
+			  status);
+		return status;
+	}
+
+	status = ice_set_dvm_boost_entries(hw);
+	if (status) {
+		ice_debug(hw, ICE_DBG_INIT, "Failed to set boost TCAM entries for double VLAN mode, status %d\n",
+			  status);
+		return status;
+	}
+
+	return 0;
+}
+
+/**
+ * ice_set_svm - set single VLAN mode
+ * @hw: pointer to the HW structure
+ */
+static int ice_set_svm(struct ice_hw *hw)
+{
+	struct ice_aqc_set_vlan_mode *set_params;
+	int status;
+
+	status = ice_aq_set_port_params(hw->port_info, false, NULL);
+	if (status) {
+		ice_debug(hw, ICE_DBG_INIT, "Failed to set port parameters for single VLAN mode\n");
+		return status;
+	}
+
+	set_params = devm_kzalloc(ice_hw_to_dev(hw), sizeof(*set_params),
+				  GFP_KERNEL);
+	if (!set_params)
+		return -ENOMEM;
+
+	/* default configuration for SVM configurations */
+	set_params->l2tag_prio_tagging = ICE_AQ_VLAN_PRIO_TAG_INNER_CTAG;
+	set_params->rdma_packet = ICE_AQ_SVM_VLAN_RDMA_PKT_FLAG_SETTING;
+	set_params->mng_vlan_prot_id = ICE_AQ_VLAN_MNG_PROTOCOL_ID_INNER;
+
+	status = ice_aq_set_vlan_mode(hw, set_params);
+	if (status)
+		ice_debug(hw, ICE_DBG_INIT, "Failed to configure port in single VLAN mode\n");
+
+	devm_kfree(ice_hw_to_dev(hw), set_params);
+	return status;
+}
+
+/**
+ * ice_set_vlan_mode
+ * @hw: pointer to the HW structure
+ */
+int ice_set_vlan_mode(struct ice_hw *hw)
+{
+	if (!ice_is_dvm_supported(hw))
+		return 0;
+
+	if (!ice_set_dvm(hw))
+		return 0;
+
+	return ice_set_svm(hw);
+}
+
+/**
+ * ice_print_dvm_not_supported - print if DDP and/or FW doesn't support DVM
+ * @hw: pointer to the HW structure
+ *
+ * The purpose of this function is to print that  QinQ is not supported due to
+ * incompatibilty from the DDP and/or FW. This will give a hint to the user to
+ * update one and/or both components if they expect QinQ functionality.
+ */
+static void ice_print_dvm_not_supported(struct ice_hw *hw)
+{
+	bool pkg_supports_dvm = ice_pkg_supports_dvm(hw);
+	bool fw_supports_dvm = ice_fw_supports_dvm(hw);
+
+	if (!fw_supports_dvm && !pkg_supports_dvm)
+		dev_info(ice_hw_to_dev(hw), "QinQ functionality cannot be enabled on this device. Update your DDP package and NVM to versions that support QinQ.\n");
+	else if (!pkg_supports_dvm)
+		dev_info(ice_hw_to_dev(hw), "QinQ functionality cannot be enabled on this device. Update your DDP package to a version that supports QinQ.\n");
+	else if (!fw_supports_dvm)
+		dev_info(ice_hw_to_dev(hw), "QinQ functionality cannot be enabled on this device. Update your NVM to a version that supports QinQ.\n");
+}
+
+/**
+ * ice_post_pkg_dwnld_vlan_mode_cfg - configure VLAN mode after DDP download
+ * @hw: pointer to the HW structure
+ *
+ * This function is meant to configure any VLAN mode specific functionality
+ * after the global configuration lock has been released and the DDP has been
+ * downloaded.
+ *
+ * Since only one PF downloads the DDP and configures the VLAN mode there needs
+ * to be a way to configure the other PFs after the DDP has been downloaded and
+ * the global configuration lock has been released. All such code should go in
+ * this function.
+ */
+void ice_post_pkg_dwnld_vlan_mode_cfg(struct ice_hw *hw)
+{
+	ice_cache_vlan_mode(hw);
+
+	if (ice_is_dvm_ena(hw))
+		ice_change_proto_id_to_dvm();
+	else
+		ice_print_dvm_not_supported(hw);
+}