RDMA/irdma: Refactor GEN2 auxiliary driver

Refactor the irdma auxiliary driver and associated interfaces out of main.c
and into a standalone GEN2-specific source file and rename as gen_2 driver.

This is in preparation for adding GEN3 auxiliary drivers. Each HW
generation will have its own gen-specific interface file.

Additionally, move the Address Handle hash table and associated locks
under rf struct. This will allow GEN3 code to migrate to use it easily.

Signed-off-by: Mustafa Ismail <mustafa.ismail@intel.com>
Co-developed-by: Tatyana Nikolova <tatyana.e.nikolova@intel.com>
Signed-off-by: Tatyana Nikolova <tatyana.e.nikolova@intel.com>
Link: https://patch.msgid.link/20250827152545.2056-2-tatyana.e.nikolova@intel.com
Tested-by: Jacob Moroni <jmoroni@google.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>

Author: mustafakismail

drivers/infiniband/hw/irdma/Makefile

@@ -13,6 +13,7 @@ irdma-objs := cm.o        \
               hw.o        \
               i40iw_hw.o  \
               i40iw_if.o  \
+	      icrdma_if.o \
               icrdma_hw.o \
               main.o      \
               pble.o      \

drivers/infiniband/hw/irdma/i40iw_if.c

@@ -75,6 +75,8 @@ static void i40iw_fill_device_info(struct irdma_device *iwdev, struct i40e_info
 	struct irdma_pci_f *rf = iwdev->rf;
 
 	rf->rdma_ver = IRDMA_GEN_1;
+	rf->sc_dev.hw = &rf->hw;
+	rf->sc_dev.hw_attrs.uk_attrs.hw_rev = IRDMA_GEN_1;
 	rf->gen_ops.request_reset = i40iw_request_reset;
 	rf->pcidev = cdev_info->pcidev;
 	rf->pf_id = cdev_info->fid;

drivers/infiniband/hw/irdma/icrdma_if.c

@@ -0,0 +1,341 @@
+// SPDX-License-Identifier: GPL-2.0 or Linux-OpenIB
+/* Copyright (c) 2015 - 2024 Intel Corporation */
+
+#include "main.h"
+#include <linux/net/intel/iidc_rdma_ice.h>
+
+static void icrdma_prep_tc_change(struct irdma_device *iwdev)
+{
+	iwdev->vsi.tc_change_pending = true;
+	irdma_sc_suspend_resume_qps(&iwdev->vsi, IRDMA_OP_SUSPEND);
+
+	/* Wait for all qp's to suspend */
+	wait_event_timeout(iwdev->suspend_wq,
+			   !atomic_read(&iwdev->vsi.qp_suspend_reqs),
+			   msecs_to_jiffies(IRDMA_EVENT_TIMEOUT_MS));
+	irdma_ws_reset(&iwdev->vsi);
+}
+
+static void icrdma_fill_qos_info(struct irdma_l2params *l2params,
+			 struct iidc_rdma_qos_params *qos_info)
+{
+	int i;
+
+	l2params->num_tc = qos_info->num_tc;
+	l2params->vsi_prio_type = qos_info->vport_priority_type;
+	l2params->vsi_rel_bw = qos_info->vport_relative_bw;
+	for (i = 0; i < l2params->num_tc; i++) {
+		l2params->tc_info[i].egress_virt_up =
+			qos_info->tc_info[i].egress_virt_up;
+		l2params->tc_info[i].ingress_virt_up =
+			qos_info->tc_info[i].ingress_virt_up;
+		l2params->tc_info[i].prio_type = qos_info->tc_info[i].prio_type;
+		l2params->tc_info[i].rel_bw = qos_info->tc_info[i].rel_bw;
+		l2params->tc_info[i].tc_ctx = qos_info->tc_info[i].tc_ctx;
+	}
+	for (i = 0; i < IIDC_MAX_USER_PRIORITY; i++)
+		l2params->up2tc[i] = qos_info->up2tc[i];
+	if (qos_info->pfc_mode == IIDC_DSCP_PFC_MODE) {
+		l2params->dscp_mode = true;
+		memcpy(l2params->dscp_map, qos_info->dscp_map, sizeof(l2params->dscp_map));
+	}
+}
+
+static void icrdma_iidc_event_handler(struct iidc_rdma_core_dev_info *cdev_info,
+				     struct iidc_rdma_event *event)
+{
+	struct irdma_device *iwdev = dev_get_drvdata(&cdev_info->adev->dev);
+	struct irdma_l2params l2params = {};
+
+	if (*event->type & BIT(IIDC_RDMA_EVENT_AFTER_MTU_CHANGE)) {
+		ibdev_dbg(&iwdev->ibdev, "CLNT: new MTU = %d\n", iwdev->netdev->mtu);
+		if (iwdev->vsi.mtu != iwdev->netdev->mtu) {
+			l2params.mtu = iwdev->netdev->mtu;
+			l2params.mtu_changed = true;
+			irdma_log_invalid_mtu(l2params.mtu, &iwdev->rf->sc_dev);
+			irdma_change_l2params(&iwdev->vsi, &l2params);
+		}
+	} else if (*event->type & BIT(IIDC_RDMA_EVENT_BEFORE_TC_CHANGE)) {
+		if (iwdev->vsi.tc_change_pending)
+			return;
+
+		icrdma_prep_tc_change(iwdev);
+	} else if (*event->type & BIT(IIDC_RDMA_EVENT_AFTER_TC_CHANGE)) {
+		struct iidc_rdma_priv_dev_info *idc_priv = cdev_info->iidc_priv;
+
+		if (!iwdev->vsi.tc_change_pending)
+			return;
+
+		l2params.tc_changed = true;
+		ibdev_dbg(&iwdev->ibdev, "CLNT: TC Change\n");
+
+		icrdma_fill_qos_info(&l2params, &idc_priv->qos_info);
+		if (iwdev->rf->protocol_used != IRDMA_IWARP_PROTOCOL_ONLY)
+			iwdev->dcb_vlan_mode =
+				l2params.num_tc > 1 && !l2params.dscp_mode;
+		irdma_change_l2params(&iwdev->vsi, &l2params);
+	} else if (*event->type & BIT(IIDC_RDMA_EVENT_CRIT_ERR)) {
+		ibdev_warn(&iwdev->ibdev, "ICE OICR event notification: oicr = 0x%08x\n",
+			   event->reg);
+		if (event->reg & IRDMAPFINT_OICR_PE_CRITERR_M) {
+			u32 pe_criterr;
+
+			pe_criterr = readl(iwdev->rf->sc_dev.hw_regs[IRDMA_GLPE_CRITERR]);
+#define IRDMA_Q1_RESOURCE_ERR 0x0001024d
+			if (pe_criterr != IRDMA_Q1_RESOURCE_ERR) {
+				ibdev_err(&iwdev->ibdev, "critical PE Error, GLPE_CRITERR=0x%08x\n",
+					  pe_criterr);
+				iwdev->rf->reset = true;
+			} else {
+				ibdev_warn(&iwdev->ibdev, "Q1 Resource Check\n");
+			}
+		}
+		if (event->reg & IRDMAPFINT_OICR_HMC_ERR_M) {
+			ibdev_err(&iwdev->ibdev, "HMC Error\n");
+			iwdev->rf->reset = true;
+		}
+		if (event->reg & IRDMAPFINT_OICR_PE_PUSH_M) {
+			ibdev_err(&iwdev->ibdev, "PE Push Error\n");
+			iwdev->rf->reset = true;
+		}
+		if (iwdev->rf->reset)
+			iwdev->rf->gen_ops.request_reset(iwdev->rf);
+	}
+}
+
+/**
+ * icrdma_lan_register_qset - Register qset with LAN driver
+ * @vsi: vsi structure
+ * @tc_node: Traffic class node
+ */
+static int icrdma_lan_register_qset(struct irdma_sc_vsi *vsi,
+				    struct irdma_ws_node *tc_node)
+{
+	struct irdma_device *iwdev = vsi->back_vsi;
+	struct iidc_rdma_core_dev_info *cdev_info = iwdev->rf->cdev;
+	struct iidc_rdma_qset_params qset = {};
+	int ret;
+
+	qset.qs_handle = tc_node->qs_handle;
+	qset.tc = tc_node->traffic_class;
+	qset.vport_id = vsi->vsi_idx;
+	ret = ice_add_rdma_qset(cdev_info, &qset);
+	if (ret) {
+		ibdev_dbg(&iwdev->ibdev, "WS: LAN alloc_res for rdma qset failed.\n");
+		return ret;
+	}
+
+	tc_node->l2_sched_node_id = qset.teid;
+	vsi->qos[tc_node->user_pri].l2_sched_node_id = qset.teid;
+
+	return 0;
+}
+
+/**
+ * icrdma_lan_unregister_qset - Unregister qset with LAN driver
+ * @vsi: vsi structure
+ * @tc_node: Traffic class node
+ */
+static void icrdma_lan_unregister_qset(struct irdma_sc_vsi *vsi,
+				       struct irdma_ws_node *tc_node)
+{
+	struct irdma_device *iwdev = vsi->back_vsi;
+	struct iidc_rdma_core_dev_info *cdev_info = iwdev->rf->cdev;
+	struct iidc_rdma_qset_params qset = {};
+
+	qset.qs_handle = tc_node->qs_handle;
+	qset.tc = tc_node->traffic_class;
+	qset.vport_id = vsi->vsi_idx;
+	qset.teid = tc_node->l2_sched_node_id;
+
+	if (ice_del_rdma_qset(cdev_info, &qset))
+		ibdev_dbg(&iwdev->ibdev, "WS: LAN free_res for rdma qset failed.\n");
+}
+
+/**
+ * icrdma_request_reset - Request a reset
+ * @rf: RDMA PCI function
+ */
+static void icrdma_request_reset(struct irdma_pci_f *rf)
+{
+	ibdev_warn(&rf->iwdev->ibdev, "Requesting a reset\n");
+	ice_rdma_request_reset(rf->cdev, IIDC_FUNC_RESET);
+}
+
+static int icrdma_init_interrupts(struct irdma_pci_f *rf, struct iidc_rdma_core_dev_info *cdev)
+{
+	int i;
+
+	rf->msix_count = num_online_cpus() + IRDMA_NUM_AEQ_MSIX;
+	rf->msix_entries = kcalloc(rf->msix_count, sizeof(*rf->msix_entries),
+				   GFP_KERNEL);
+	if (!rf->msix_entries)
+		return -ENOMEM;
+
+	for (i = 0; i < rf->msix_count; i++)
+		if (ice_alloc_rdma_qvector(cdev, &rf->msix_entries[i]))
+			break;
+
+	if (i < IRDMA_MIN_MSIX) {
+		while (--i >= 0)
+			ice_free_rdma_qvector(cdev, &rf->msix_entries[i]);
+
+		kfree(rf->msix_entries);
+		return -ENOMEM;
+	}
+
+	rf->msix_count = i;
+
+	return 0;
+}
+
+static void icrdma_deinit_interrupts(struct irdma_pci_f *rf, struct iidc_rdma_core_dev_info *cdev)
+{
+	int i;
+
+	for (i = 0; i < rf->msix_count; i++)
+		ice_free_rdma_qvector(cdev, &rf->msix_entries[i]);
+
+	kfree(rf->msix_entries);
+}
+
+static void icrdma_fill_device_info(struct irdma_device *iwdev,
+				    struct iidc_rdma_core_dev_info *cdev_info)
+{
+	struct iidc_rdma_priv_dev_info *idc_priv = cdev_info->iidc_priv;
+	struct irdma_pci_f *rf = iwdev->rf;
+
+	rf->sc_dev.hw = &rf->hw;
+	rf->iwdev = iwdev;
+	rf->cdev = cdev_info;
+	rf->hw.hw_addr = idc_priv->hw_addr;
+	rf->pcidev = cdev_info->pdev;
+	rf->hw.device = &rf->pcidev->dev;
+	rf->pf_id = idc_priv->pf_id;
+	rf->rdma_ver = IRDMA_GEN_2;
+	rf->sc_dev.hw_attrs.uk_attrs.hw_rev = IRDMA_GEN_2;
+
+	rf->gen_ops.register_qset = icrdma_lan_register_qset;
+	rf->gen_ops.unregister_qset = icrdma_lan_unregister_qset;
+
+	rf->default_vsi.vsi_idx = idc_priv->vport_id;
+	rf->protocol_used =
+		cdev_info->rdma_protocol == IIDC_RDMA_PROTOCOL_ROCEV2 ?
+			IRDMA_ROCE_PROTOCOL_ONLY : IRDMA_IWARP_PROTOCOL_ONLY;
+	rf->rsrc_profile = IRDMA_HMC_PROFILE_DEFAULT;
+	rf->rst_to = IRDMA_RST_TIMEOUT_HZ;
+	rf->gen_ops.request_reset = icrdma_request_reset;
+	rf->limits_sel = 7;
+	mutex_init(&rf->ah_tbl_lock);
+
+	iwdev->netdev = idc_priv->netdev;
+	iwdev->vsi_num = idc_priv->vport_id;
+	iwdev->init_state = INITIAL_STATE;
+	iwdev->roce_cwnd = IRDMA_ROCE_CWND_DEFAULT;
+	iwdev->roce_ackcreds = IRDMA_ROCE_ACKCREDS_DEFAULT;
+	iwdev->rcv_wnd = IRDMA_CM_DEFAULT_RCV_WND_SCALED;
+	iwdev->rcv_wscale = IRDMA_CM_DEFAULT_RCV_WND_SCALE;
+	if (iwdev->rf->protocol_used != IRDMA_IWARP_PROTOCOL_ONLY)
+		iwdev->roce_mode = true;
+}
+
+static int icrdma_probe(struct auxiliary_device *aux_dev, const struct auxiliary_device_id *id)
+{
+	struct iidc_rdma_core_auxiliary_dev *iidc_adev;
+	struct iidc_rdma_core_dev_info *cdev_info;
+	struct iidc_rdma_priv_dev_info *idc_priv;
+	struct irdma_l2params l2params = {};
+	struct irdma_device *iwdev;
+	struct irdma_pci_f *rf;
+	int err;
+
+	iidc_adev = container_of(aux_dev, struct iidc_rdma_core_auxiliary_dev, adev);
+	cdev_info = iidc_adev->cdev_info;
+	idc_priv = cdev_info->iidc_priv;
+
+	iwdev = ib_alloc_device(irdma_device, ibdev);
+	if (!iwdev)
+		return -ENOMEM;
+	iwdev->rf = kzalloc(sizeof(*rf), GFP_KERNEL);
+	if (!iwdev->rf) {
+		ib_dealloc_device(&iwdev->ibdev);
+		return -ENOMEM;
+	}
+
+	icrdma_fill_device_info(iwdev, cdev_info);
+	rf = iwdev->rf;
+
+	err = icrdma_init_interrupts(rf, cdev_info);
+	if (err)
+		goto err_init_interrupts;
+
+	err = irdma_ctrl_init_hw(rf);
+	if (err)
+		goto err_ctrl_init;
+
+	l2params.mtu = iwdev->netdev->mtu;
+	icrdma_fill_qos_info(&l2params, &idc_priv->qos_info);
+	if (iwdev->rf->protocol_used != IRDMA_IWARP_PROTOCOL_ONLY)
+		iwdev->dcb_vlan_mode = l2params.num_tc > 1 && !l2params.dscp_mode;
+
+	err = irdma_rt_init_hw(iwdev, &l2params);
+	if (err)
+		goto err_rt_init;
+
+	err = irdma_ib_register_device(iwdev);
+	if (err)
+		goto err_ibreg;
+
+	ice_rdma_update_vsi_filter(cdev_info, iwdev->vsi_num, true);
+
+	ibdev_dbg(&iwdev->ibdev, "INIT: Gen2 PF[%d] device probe success\n", PCI_FUNC(rf->pcidev->devfn));
+	auxiliary_set_drvdata(aux_dev, iwdev);
+
+	return 0;
+
+err_ibreg:
+	irdma_rt_deinit_hw(iwdev);
+err_rt_init:
+	irdma_ctrl_deinit_hw(rf);
+err_ctrl_init:
+	icrdma_deinit_interrupts(rf, cdev_info);
+err_init_interrupts:
+	kfree(iwdev->rf);
+	ib_dealloc_device(&iwdev->ibdev);
+
+	return err;
+}
+
+static void icrdma_remove(struct auxiliary_device *aux_dev)
+{
+	struct iidc_rdma_core_auxiliary_dev *idc_adev =
+		container_of(aux_dev, struct iidc_rdma_core_auxiliary_dev, adev);
+	struct iidc_rdma_core_dev_info *cdev_info = idc_adev->cdev_info;
+	struct irdma_device *iwdev = auxiliary_get_drvdata(aux_dev);
+	u8 rdma_ver = iwdev->rf->rdma_ver;
+
+	ice_rdma_update_vsi_filter(cdev_info, iwdev->vsi_num, false);
+	irdma_ib_unregister_device(iwdev);
+	icrdma_deinit_interrupts(iwdev->rf, cdev_info);
+
+	pr_debug("INIT: Gen[%d] func[%d] device remove success\n",
+		 rdma_ver, PCI_FUNC(cdev_info->pdev->devfn));
+}
+
+static const struct auxiliary_device_id icrdma_auxiliary_id_table[] = {
+	{.name = "ice.iwarp", },
+	{.name = "ice.roce", },
+	{},
+};
+
+MODULE_DEVICE_TABLE(auxiliary, icrdma_auxiliary_id_table);
+
+struct iidc_rdma_core_auxiliary_drv icrdma_core_auxiliary_drv = {
+	.adrv = {
+	    .name = "gen_2",
+	    .id_table = icrdma_auxiliary_id_table,
+	    .probe = icrdma_probe,
+	    .remove = icrdma_remove,
+	},
+	.event_handler = icrdma_iidc_event_handler,
+};