1 files changed, 218 insertions, 59 deletions

diff --git a/drivers/infiniband/hw/efa/efa_main.c b/drivers/infiniband/hw/efa/efa_main.c
index 203e6ddcacbc..6c415b9adb5f 100644
--- a/drivers/infiniband/hw/efa/efa_main.c
+++ b/drivers/infiniband/hw/efa/efa_main.c
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
 /*
- * Copyright 2018-2021 Amazon.com, Inc. or its affiliates. All rights reserved.
+ * Copyright 2018-2025 Amazon.com, Inc. or its affiliates. All rights reserved.
  */
 
 #include <linux/module.h>
@@ -9,15 +9,20 @@
 #include <linux/version.h>
 
 #include <rdma/ib_user_verbs.h>
+#include <rdma/uverbs_ioctl.h>
 
 #include "efa.h"
 
 #define PCI_DEV_ID_EFA0_VF 0xefa0
 #define PCI_DEV_ID_EFA1_VF 0xefa1
+#define PCI_DEV_ID_EFA2_VF 0xefa2
+#define PCI_DEV_ID_EFA3_VF 0xefa3
 
 static const struct pci_device_id efa_pci_tbl[] = {
 	{ PCI_VDEVICE(AMAZON, PCI_DEV_ID_EFA0_VF) },
 	{ PCI_VDEVICE(AMAZON, PCI_DEV_ID_EFA1_VF) },
+	{ PCI_VDEVICE(AMAZON, PCI_DEV_ID_EFA2_VF) },
+	{ PCI_VDEVICE(AMAZON, PCI_DEV_ID_EFA3_VF) },
 	{ }
 };
 
@@ -34,6 +39,8 @@ MODULE_DEVICE_TABLE(pci, efa_pci_tbl);
 	(BIT(EFA_ADMIN_FATAL_ERROR) | BIT(EFA_ADMIN_WARNING) | \
 	 BIT(EFA_ADMIN_NOTIFICATION) | BIT(EFA_ADMIN_KEEP_ALIVE))
 
+extern const struct uapi_definition efa_uapi_defs[];
+
 /* This handler will called for unknown event group or unimplemented handlers */
 static void unimplemented_aenq_handler(void *data,
 				       struct efa_admin_aenq_entry *aenq_e)
@@ -67,6 +74,47 @@ static void efa_release_bars(struct efa_dev *dev, int bars_mask)
 	pci_release_selected_regions(pdev, release_bars);
 }
 
+static void efa_process_comp_eqe(struct efa_dev *dev, struct efa_admin_eqe *eqe)
+{
+	u16 cqn = eqe->u.comp_event.cqn;
+	struct efa_cq *cq;
+
+	/* Safe to load as we're in irq and removal calls synchronize_irq() */
+	cq = xa_load(&dev->cqs_xa, cqn);
+	if (unlikely(!cq)) {
+		ibdev_err_ratelimited(&dev->ibdev,
+				      "Completion event on non-existent CQ[%u]",
+				      cqn);
+		return;
+	}
+
+	cq->ibcq.comp_handler(&cq->ibcq, cq->ibcq.cq_context);
+}
+
+static void efa_process_eqe(struct efa_com_eq *eeq, struct efa_admin_eqe *eqe)
+{
+	struct efa_dev *dev = container_of(eeq->edev, struct efa_dev, edev);
+
+	if (likely(EFA_GET(&eqe->common, EFA_ADMIN_EQE_EVENT_TYPE) ==
+			   EFA_ADMIN_EQE_EVENT_TYPE_COMPLETION))
+		efa_process_comp_eqe(dev, eqe);
+	else
+		ibdev_err_ratelimited(&dev->ibdev,
+				      "Unknown event type received %lu",
+				      EFA_GET(&eqe->common,
+					      EFA_ADMIN_EQE_EVENT_TYPE));
+}
+
+static irqreturn_t efa_intr_msix_comp(int irq, void *data)
+{
+	struct efa_eq *eq = data;
+	struct efa_com_dev *edev = eq->eeq.edev;
+
+	efa_com_eq_comp_intr_handler(edev, &eq->eeq);
+
+	return IRQ_HANDLED;
+}
+
 static irqreturn_t efa_intr_msix_mgmnt(int irq, void *data)
 {
 	struct efa_dev *dev = data;
@@ -77,27 +125,42 @@ static irqreturn_t efa_intr_msix_mgmnt(int irq, void *data)
 	return IRQ_HANDLED;
 }
 
-static int efa_request_mgmnt_irq(struct efa_dev *dev)
+static int efa_request_irq(struct efa_dev *dev, struct efa_irq *irq)
 {
-	struct efa_irq *irq;
 	int err;
 
-	irq = &dev->admin_irq;
-	err = request_irq(irq->vector, irq->handler, 0, irq->name,
-			  irq->data);
+	err = request_irq(irq->irqn, irq->handler, 0, irq->name, irq->data);
 	if (err) {
-		dev_err(&dev->pdev->dev, "Failed to request admin irq (%d)\n",
-			err);
+		dev_err(&dev->pdev->dev, "Failed to request irq %s (%d)\n",
+			irq->name, err);
 		return err;
 	}
 
-	dev_dbg(&dev->pdev->dev, "Set affinity hint of mgmnt irq to %*pbl (irq vector: %d)\n",
-		nr_cpumask_bits, &irq->affinity_hint_mask, irq->vector);
-	irq_set_affinity_hint(irq->vector, &irq->affinity_hint_mask);
+	irq_set_affinity_hint(irq->irqn, &irq->affinity_hint_mask);
 
 	return 0;
 }
 
+static void efa_setup_comp_irq(struct efa_dev *dev, struct efa_eq *eq, u32 vector)
+{
+	u32 cpu;
+
+	cpu = vector - EFA_COMP_EQS_VEC_BASE;
+	snprintf(eq->irq.name, EFA_IRQNAME_SIZE, "efa-comp%d@pci:%s", cpu,
+		 pci_name(dev->pdev));
+	eq->irq.handler = efa_intr_msix_comp;
+	eq->irq.data = eq;
+	eq->irq.vector = vector;
+	eq->irq.irqn = pci_irq_vector(dev->pdev, vector);
+	cpumask_set_cpu(cpu, &eq->irq.affinity_hint_mask);
+}
+
+static void efa_free_irq(struct efa_dev *dev, struct efa_irq *irq)
+{
+	irq_set_affinity_hint(irq->irqn, NULL);
+	free_irq(irq->irqn, irq->data);
+}
+
 static void efa_setup_mgmnt_irq(struct efa_dev *dev)
 {
 	u32 cpu;
@@ -106,47 +169,45 @@ static void efa_setup_mgmnt_irq(struct efa_dev *dev)
 		 "efa-mgmnt@pci:%s", pci_name(dev->pdev));
 	dev->admin_irq.handler = efa_intr_msix_mgmnt;
 	dev->admin_irq.data = dev;
-	dev->admin_irq.vector =
-		pci_irq_vector(dev->pdev, dev->admin_msix_vector_idx);
+	dev->admin_irq.vector = dev->admin_msix_vector_idx;
+	dev->admin_irq.irqn = pci_irq_vector(dev->pdev,
+					     dev->admin_msix_vector_idx);
 	cpu = cpumask_first(cpu_online_mask);
-	dev->admin_irq.cpu = cpu;
 	cpumask_set_cpu(cpu,
 			&dev->admin_irq.affinity_hint_mask);
-	dev_info(&dev->pdev->dev, "Setup irq:0x%p vector:%d name:%s\n",
-		 &dev->admin_irq,
-		 dev->admin_irq.vector,
+	dev_info(&dev->pdev->dev, "Setup irq:%d name:%s\n",
+		 dev->admin_irq.irqn,
 		 dev->admin_irq.name);
 }
 
-static void efa_free_mgmnt_irq(struct efa_dev *dev)
-{
-	struct efa_irq *irq;
-
-	irq = &dev->admin_irq;
-	irq_set_affinity_hint(irq->vector, NULL);
-	free_irq(irq->vector, irq->data);
-}
-
 static int efa_set_mgmnt_irq(struct efa_dev *dev)
 {
 	efa_setup_mgmnt_irq(dev);
 
-	return efa_request_mgmnt_irq(dev);
+	return efa_request_irq(dev, &dev->admin_irq);
 }
 
 static int efa_request_doorbell_bar(struct efa_dev *dev)
 {
 	u8 db_bar_idx = dev->dev_attr.db_bar;
 	struct pci_dev *pdev = dev->pdev;
-	int bars;
+	int pci_mem_bars;
+	int db_bar;
 	int err;
 
-	if (!(BIT(db_bar_idx) & EFA_BASE_BAR_MASK)) {
-		bars = pci_select_bars(pdev, IORESOURCE_MEM) & BIT(db_bar_idx);
+	db_bar = BIT(db_bar_idx);
+	if (!(db_bar & EFA_BASE_BAR_MASK)) {
+		pci_mem_bars = pci_select_bars(pdev, IORESOURCE_MEM);
+		if (db_bar & ~pci_mem_bars) {
+			dev_err(&pdev->dev,
+				"Doorbells BAR unavailable. Requested %#x, available %#x\n",
+				db_bar, pci_mem_bars);
+			return -ENODEV;
+		}
 
-		err = pci_request_selected_regions(pdev, bars, DRV_MODULE_NAME);
+		err = pci_request_selected_regions(pdev, db_bar, DRV_MODULE_NAME);
 		if (err) {
-			dev_err(&dev->pdev->dev,
+			dev_err(&pdev->dev,
 				"pci_request_selected_regions for bar %d failed %d\n",
 				db_bar_idx, err);
 			return err;
@@ -237,6 +298,70 @@ static void efa_set_host_info(struct efa_dev *dev)
 	dma_free_coherent(&dev->pdev->dev, bufsz, hinf, hinf_dma);
 }
 
+static void efa_destroy_eq(struct efa_dev *dev, struct efa_eq *eq)
+{
+	efa_com_eq_destroy(&dev->edev, &eq->eeq);
+	efa_free_irq(dev, &eq->irq);
+}
+
+static int efa_create_eq(struct efa_dev *dev, struct efa_eq *eq, u32 msix_vec)
+{
+	int err;
+
+	efa_setup_comp_irq(dev, eq, msix_vec);
+	err = efa_request_irq(dev, &eq->irq);
+	if (err)
+		return err;
+
+	err = efa_com_eq_init(&dev->edev, &eq->eeq, efa_process_eqe,
+			      dev->dev_attr.max_eq_depth, msix_vec);
+	if (err)
+		goto err_free_comp_irq;
+
+	return 0;
+
+err_free_comp_irq:
+	efa_free_irq(dev, &eq->irq);
+	return err;
+}
+
+static int efa_create_eqs(struct efa_dev *dev)
+{
+	u32 neqs = dev->dev_attr.max_eq;
+	int err, i;
+
+	neqs = min_t(u32, neqs, dev->num_irq_vectors - EFA_COMP_EQS_VEC_BASE);
+	dev->neqs = neqs;
+	dev->eqs = kcalloc(neqs, sizeof(*dev->eqs), GFP_KERNEL);
+	if (!dev->eqs)
+		return -ENOMEM;
+
+	for (i = 0; i < neqs; i++) {
+		err = efa_create_eq(dev, &dev->eqs[i], i + EFA_COMP_EQS_VEC_BASE);
+		if (err)
+			goto err_destroy_eqs;
+	}
+
+	return 0;
+
+err_destroy_eqs:
+	for (i--; i >= 0; i--)
+		efa_destroy_eq(dev, &dev->eqs[i]);
+	kfree(dev->eqs);
+
+	return err;
+}
+
+static void efa_destroy_eqs(struct efa_dev *dev)
+{
+	int i;
+
+	for (i = 0; i < dev->neqs; i++)
+		efa_destroy_eq(dev, &dev->eqs[i]);
+
+	kfree(dev->eqs);
+}
+
 static const struct ib_device_ops efa_dev_ops = {
 	.owner = THIS_MODULE,
 	.driver_id = RDMA_DRIVER_EFA,
@@ -247,6 +372,7 @@ static const struct ib_device_ops efa_dev_ops = {
 	.alloc_pd = efa_alloc_pd,
 	.alloc_ucontext = efa_alloc_ucontext,
 	.create_cq = efa_create_cq,
+	.create_cq_umem = efa_create_cq_umem,
 	.create_qp = efa_create_qp,
 	.create_user_ah = efa_create_ah,
 	.dealloc_pd = efa_dealloc_pd,
@@ -267,10 +393,12 @@ static const struct ib_device_ops efa_dev_ops = {
 	.query_port = efa_query_port,
 	.query_qp = efa_query_qp,
 	.reg_user_mr = efa_reg_mr,
+	.reg_user_mr_dmabuf = efa_reg_user_mr_dmabuf,
 
 	INIT_RDMA_OBJ_SIZE(ib_ah, efa_ah, ibah),
 	INIT_RDMA_OBJ_SIZE(ib_cq, efa_cq, ibcq),
 	INIT_RDMA_OBJ_SIZE(ib_pd, efa_pd, ibpd),
+	INIT_RDMA_OBJ_SIZE(ib_qp, efa_qp, ibqp),
 	INIT_RDMA_OBJ_SIZE(ib_ucontext, efa_ucontext, ibucontext),
 };
 
@@ -302,23 +430,32 @@ static int efa_ib_device_add(struct efa_dev *dev)
 	if (err)
 		goto err_release_doorbell_bar;
 
+	err = efa_create_eqs(dev);
+	if (err)
+		goto err_release_doorbell_bar;
+
 	efa_set_host_info(dev);
 
 	dev->ibdev.node_type = RDMA_NODE_UNSPECIFIED;
+	dev->ibdev.node_guid = dev->dev_attr.guid;
 	dev->ibdev.phys_port_cnt = 1;
-	dev->ibdev.num_comp_vectors = 1;
+	dev->ibdev.num_comp_vectors = dev->neqs ?: 1;
 	dev->ibdev.dev.parent = &pdev->dev;
 
 	ib_set_device_ops(&dev->ibdev, &efa_dev_ops);
 
+	dev->ibdev.driver_def = efa_uapi_defs;
+
 	err = ib_register_device(&dev->ibdev, "efa_%d", &pdev->dev);
 	if (err)
-		goto err_release_doorbell_bar;
+		goto err_destroy_eqs;
 
 	ibdev_info(&dev->ibdev, "IB device registered\n");
 
 	return 0;
 
+err_destroy_eqs:
+	efa_destroy_eqs(dev);
 err_release_doorbell_bar:
 	efa_release_doorbell_bar(dev);
 	return err;
@@ -326,9 +463,9 @@ err_release_doorbell_bar:
 
 static void efa_ib_device_remove(struct efa_dev *dev)
 {
-	efa_com_dev_reset(&dev->edev, EFA_REGS_RESET_NORMAL);
 	ibdev_info(&dev->ibdev, "Unregister ib device\n");
 	ib_unregister_device(&dev->ibdev);
+	efa_destroy_eqs(dev);
 	efa_release_doorbell_bar(dev);
 }
 
@@ -339,29 +476,30 @@ static void efa_disable_msix(struct efa_dev *dev)
 
 static int efa_enable_msix(struct efa_dev *dev)
 {
-	int msix_vecs, irq_num;
-
-	/* Reserve the max msix vectors we might need */
-	msix_vecs = EFA_NUM_MSIX_VEC;
+	int max_vecs, num_vecs;
+
+	/*
+	 * Reserve the max msix vectors we might need, one vector is reserved
+	 * for admin.
+	 */
+	max_vecs = min_t(int, pci_msix_vec_count(dev->pdev),
+			 num_online_cpus() + 1);
 	dev_dbg(&dev->pdev->dev, "Trying to enable MSI-X, vectors %d\n",
-		msix_vecs);
+		max_vecs);
 
 	dev->admin_msix_vector_idx = EFA_MGMNT_MSIX_VEC_IDX;
-	irq_num = pci_alloc_irq_vectors(dev->pdev, msix_vecs,
-					msix_vecs, PCI_IRQ_MSIX);
+	num_vecs = pci_alloc_irq_vectors(dev->pdev, 1,
+					 max_vecs, PCI_IRQ_MSIX);
 
-	if (irq_num < 0) {
-		dev_err(&dev->pdev->dev, "Failed to enable MSI-X. irq_num %d\n",
-			irq_num);
+	if (num_vecs < 0) {
+		dev_err(&dev->pdev->dev, "Failed to enable MSI-X. error %d\n",
+			num_vecs);
 		return -ENOSPC;
 	}
 
-	if (irq_num != msix_vecs) {
-		dev_err(&dev->pdev->dev,
-			"Allocated %d MSI-X (out of %d requested)\n",
-			irq_num, msix_vecs);
-		return -ENOSPC;
-	}
+	dev_dbg(&dev->pdev->dev, "Allocated %d MSI-X vectors\n", num_vecs);
+
+	dev->num_irq_vectors = num_vecs;
 
 	return 0;
 }
@@ -399,7 +537,7 @@ static struct efa_dev *efa_probe_device(struct pci_dev *pdev)
 {
 	struct efa_com_dev *edev;
 	struct efa_dev *dev;
-	int bars;
+	int pci_mem_bars;
 	int err;
 
 	err = pci_enable_device_mem(pdev);
@@ -422,9 +560,16 @@ static struct efa_dev *efa_probe_device(struct pci_dev *pdev)
 	edev->efa_dev = dev;
 	edev->dmadev = &pdev->dev;
 	dev->pdev = pdev;
+	xa_init(&dev->cqs_xa);
 
-	bars = pci_select_bars(pdev, IORESOURCE_MEM) & EFA_BASE_BAR_MASK;
-	err = pci_request_selected_regions(pdev, bars, DRV_MODULE_NAME);
+	pci_mem_bars = pci_select_bars(pdev, IORESOURCE_MEM);
+	if (EFA_BASE_BAR_MASK & ~pci_mem_bars) {
+		dev_err(&pdev->dev, "BARs unavailable. Requested %#x, available %#x\n",
+			(int)EFA_BASE_BAR_MASK, pci_mem_bars);
+		err = -ENODEV;
+		goto err_ibdev_destroy;
+	}
+	err = pci_request_selected_regions(pdev, EFA_BASE_BAR_MASK, DRV_MODULE_NAME);
 	if (err) {
 		dev_err(&pdev->dev, "pci_request_selected_regions failed %d\n",
 			err);
@@ -477,7 +622,7 @@ static struct efa_dev *efa_probe_device(struct pci_dev *pdev)
 	return dev;
 
 err_free_mgmnt_irq:
-	efa_free_mgmnt_irq(dev);
+	efa_free_irq(dev, &dev->admin_irq);
 err_disable_msix:
 	efa_disable_msix(dev);
 err_reg_read_destroy:
@@ -493,18 +638,21 @@ err_disable_device:
 	return ERR_PTR(err);
 }
 
-static void efa_remove_device(struct pci_dev *pdev)
+static void efa_remove_device(struct pci_dev *pdev,
+			      enum efa_regs_reset_reason_types reset_reason)
 {
 	struct efa_dev *dev = pci_get_drvdata(pdev);
 	struct efa_com_dev *edev;
 
 	edev = &dev->edev;
+	efa_com_dev_reset(edev, reset_reason);
 	efa_com_admin_destroy(edev);
-	efa_free_mgmnt_irq(dev);
+	efa_free_irq(dev, &dev->admin_irq);
 	efa_disable_msix(dev);
 	efa_com_mmio_reg_read_destroy(edev);
 	devm_iounmap(&pdev->dev, edev->reg_bar);
 	efa_release_bars(dev, EFA_BASE_BAR_MASK);
+	xa_destroy(&dev->cqs_xa);
 	ib_dealloc_device(&dev->ibdev);
 	pci_disable_device(pdev);
 }
@@ -525,7 +673,7 @@ static int efa_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	return 0;
 
 err_remove_device:
-	efa_remove_device(pdev);
+	efa_remove_device(pdev, EFA_REGS_RESET_INIT_ERR);
 	return err;
 }
 
@@ -534,7 +682,17 @@ static void efa_remove(struct pci_dev *pdev)
 	struct efa_dev *dev = pci_get_drvdata(pdev);
 
 	efa_ib_device_remove(dev);
-	efa_remove_device(pdev);
+	efa_remove_device(pdev, EFA_REGS_RESET_NORMAL);
+}
+
+static void efa_shutdown(struct pci_dev *pdev)
+{
+	struct efa_dev *dev = pci_get_drvdata(pdev);
+
+	efa_destroy_eqs(dev);
+	efa_com_dev_reset(&dev->edev, EFA_REGS_RESET_SHUTDOWN);
+	efa_free_irq(dev, &dev->admin_irq);
+	efa_disable_msix(dev);
 }
 
 static struct pci_driver efa_pci_driver = {
@@ -542,6 +700,7 @@ static struct pci_driver efa_pci_driver = {
 	.id_table       = efa_pci_tbl,
 	.probe          = efa_probe,
 	.remove         = efa_remove,
+	.shutdown       = efa_shutdown,
 };
 
 module_pci_driver(efa_pci_driver);