IB/hfi1: Make the MSIx resource allocation a bit more flexible

The current method of allocating MSIx resources is a bit cumbersome,
and not very easily added to.

Refactor and re-order the code paths into a more consistent interface.

Update the interface so that allocations are not order dependent.
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Reviewed-by: Sadanand Warrier <sadanand.warrier@intel.com>
Signed-off-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/hw/hfi1/affinity.c

@@ -817,10 +817,10 @@ static void hfi1_update_sdma_affinity(struct hfi1_msix_entry *msix, int cpu)
 	set = &entry->def_intr;
 	cpumask_set_cpu(cpu, &set->mask);
 	cpumask_set_cpu(cpu, &set->used);
-	for (i = 0; i < dd->num_msix_entries; i++) {
+	for (i = 0; i < dd->msix_info.max_requested; i++) {
 		struct hfi1_msix_entry *other_msix;
 
-		other_msix = &dd->msix_entries[i];
+		other_msix = &dd->msix_info.msix_entries[i];
 		if (other_msix->type != IRQ_SDMA || other_msix == msix)
 			continue;
 

drivers/infiniband/hw/hfi1/chip.c

@@ -13099,6 +13099,35 @@ void reset_interrupts(struct hfi1_devdata *dd)
 		write_csr(dd, CCE_INT_MAP + (8 * i), 0);
 }
 
+/**
+ * set_up_interrupts() - Initialize the IRQ resources and state
+ * @dd: valid devdata
+ *
+ */
+static int set_up_interrupts(struct hfi1_devdata *dd)
+{
+	int ret;
+
+	/* mask all interrupts */
+	set_intr_state(dd, 0);
+	/* clear all pending interrupts */
+	clear_all_interrupts(dd);
+
+	/* reset general handler mask, chip MSI-X mappings */
+	reset_interrupts(dd);
+
+	/* ask for MSI-X interrupts */
+	ret = msix_initialize(dd);
+	if (ret)
+		return ret;
+
+	ret = msix_request_irqs(dd);
+	if (ret)
+		msix_clean_up_interrupts(dd);
+
+	return ret;
+}
+
 /*
  * Set up context values in dd.  Sets:
  *
@@ -14966,7 +14995,7 @@ int hfi1_init_dd(struct hfi1_devdata *dd)
 	free_cntrs(dd);
 bail_clear_intr:
 	hfi1_comp_vectors_clean_up(dd);
-	hfi1_clean_up_interrupts(dd);
+	msix_clean_up_interrupts(dd);
 bail_cleanup:
 	hfi1_pcie_ddcleanup(dd);
 bail_free:

drivers/infiniband/hw/hfi1/hfi.h

@@ -668,6 +668,14 @@ struct hfi1_msix_entry {
 	struct irq_affinity_notify notify;
 };
 
+struct hfi1_msix_info {
+	/* lock to synchronize in_use_msix access */
+	spinlock_t msix_lock;
+	DECLARE_BITMAP(in_use_msix, CCE_NUM_MSIX_VECTORS);
+	struct hfi1_msix_entry *msix_entries;
+	u16 max_requested;
+};
+
 /* per-SL CCA information */
 struct cca_timer {
 	struct hrtimer hrtimer;
@@ -993,7 +1001,6 @@ struct hfi1_vnic_data {
 	struct idr vesw_idr;
 	u8 rmt_start;
 	u8 num_ctxt;
-	u32 msix_idx;
 };
 
 struct hfi1_vnic_vport_info;
@@ -1207,9 +1214,7 @@ struct hfi1_devdata {
 	struct diag_client *diag_client;
 
 	/* MSI-X information */
-	struct hfi1_msix_entry *msix_entries;
-	u32 num_msix_entries;
-	u32 first_dyn_msix_idx;
+	struct hfi1_msix_info msix_info;
 
 	/* general interrupt: mask of handled interrupts */
 	u64 gi_mask[CCE_NUM_INT_CSRS];

drivers/infiniband/hw/hfi1/init.c

@@ -1052,7 +1052,7 @@ static void shutdown_device(struct hfi1_devdata *dd)
 
 	/* mask and clean up interrupts, but not errors */
 	set_intr_state(dd, 0);
-	hfi1_clean_up_interrupts(dd);
+	msix_clean_up_interrupts(dd);
 
 	for (pidx = 0; pidx < dd->num_pports; ++pidx) {
 		ppd = dd->pport + pidx;
@@ -1738,7 +1738,7 @@ static int init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 		dd_dev_err(dd, "Failed to create /dev devices: %d\n", -j);
 
 	if (initfail || ret) {
-		hfi1_clean_up_interrupts(dd);
+		msix_clean_up_interrupts(dd);
 		stop_timers(dd);
 		flush_workqueue(ib_wq);
 		for (pidx = 0; pidx < dd->num_pports; ++pidx) {

drivers/infiniband/hw/hfi1/msix.c

@@ -47,284 +47,301 @@
  */
 
 #include "hfi.h"
+#include "affinity.h"
 #include "sdma.h"
 
-/*
- * Returns:
- *	- actual number of interrupts allocated or
- *      - error
+/**
+ * msix_initialize() - Calculate, request and configure MSIx IRQs
+ * @dd: valid hfi1 devdata
+ *
  */
-int request_msix(struct hfi1_devdata *dd, u32 msireq)
+int msix_initialize(struct hfi1_devdata *dd)
 {
-	int nvec;
+	u32 total;
+	int ret;
+	struct hfi1_msix_entry *entries;
 
-	nvec = pci_alloc_irq_vectors(dd->pcidev, msireq, msireq, PCI_IRQ_MSIX);
-	if (nvec < 0) {
-		dd_dev_err(dd, "pci_alloc_irq_vectors() failed: %d\n", nvec);
-		return nvec;
+	/*
+	 * MSIx interrupt count:
+	 *	one for the general, "slow path" interrupt
+	 *	one per used SDMA engine
+	 *	one per kernel receive context
+	 *	one for each VNIC context
+	 *      ...any new IRQs should be added here.
+	 */
+	total = 1 + dd->num_sdma + dd->n_krcv_queues + dd->num_vnic_contexts;
+
+	if (total >= CCE_NUM_MSIX_VECTORS)
+		return -EINVAL;
+
+	ret = pci_alloc_irq_vectors(dd->pcidev, total, total, PCI_IRQ_MSIX);
+	if (ret < 0) {
+		dd_dev_err(dd, "pci_alloc_irq_vectors() failed: %d\n", ret);
+		return ret;
+	}
+
+	entries = kcalloc(total, sizeof(*dd->msix_info.msix_entries),
+			  GFP_KERNEL);
+	if (!entries) {
+		pci_free_irq_vectors(dd->pcidev);
+		return -ENOMEM;
 	}
 
-	return nvec;
+	dd->msix_info.msix_entries = entries;
+	spin_lock_init(&dd->msix_info.msix_lock);
+	bitmap_zero(dd->msix_info.in_use_msix, total);
+	dd->msix_info.max_requested = total;
+	dd_dev_info(dd, "%u MSI-X interrupts allocated\n", total);
+
+	return 0;
 }
 
-int set_up_interrupts(struct hfi1_devdata *dd)
+/**
+ * msix_request_irq() - Allocate a free MSIx IRQ
+ * @dd: valid devdata
+ * @arg: context information for the IRQ
+ * @handler: IRQ handler
+ * @thread: IRQ thread handler (could be NULL)
+ * @idx: zero base idx if multiple devices are needed
+ * @type: affinty IRQ type
+ *
+ * Allocated an MSIx vector if available, and then create the appropriate
+ * meta data needed to keep track of the pci IRQ request.
+ *
+ * Return:
+ *   < 0   Error
+ *   >= 0  MSIx vector
+ *
+ */
+static int msix_request_irq(struct hfi1_devdata *dd, void *arg,
+			    irq_handler_t handler, irq_handler_t thread,
+			    u32 idx, enum irq_type type)
 {
-	u32 total;
-	int ret, request;
-
-	/*
-	 * Interrupt count:
-	 *	1 general, "slow path" interrupt (includes the SDMA engines
-	 *		slow source, SDMACleanupDone)
-	 *	N interrupts - one per used SDMA engine
-	 *	M interrupt - one per kernel receive context
-	 *	V interrupt - one for each VNIC context
-	 */
-	total = 1 + dd->num_sdma + dd->n_krcv_queues + dd->num_vnic_contexts;
+	unsigned long nr;
+	int irq;
+	int ret;
+	const char *err_info;
+	char name[MAX_NAME_SIZE];
+	struct hfi1_msix_entry *me;
 
-	/* ask for MSI-X interrupts */
-	request = request_msix(dd, total);
-	if (request < 0) {
-		ret = request;
-		goto fail;
-	} else {
-		dd->msix_entries = kcalloc(total, sizeof(*dd->msix_entries),
-					   GFP_KERNEL);
-		if (!dd->msix_entries) {
-			ret = -ENOMEM;
-			goto fail;
+	/* Allocate an MSIx vector */
+	spin_lock(&dd->msix_info.msix_lock);
+	nr = find_first_zero_bit(dd->msix_info.in_use_msix,
+				 dd->msix_info.max_requested);
+	if (nr < dd->msix_info.max_requested)
+		__set_bit(nr, dd->msix_info.in_use_msix);
+	spin_unlock(&dd->msix_info.msix_lock);
+
+	if (nr == dd->msix_info.max_requested)
+		return -ENOSPC;
+
+	/* Specific verification and determine the name */
+	switch (type) {
+	case IRQ_GENERAL:
+		/* general interrupt must be MSIx vector 0 */
+		if (nr) {
+			spin_lock(&dd->msix_info.msix_lock);
+			__clear_bit(nr, dd->msix_info.in_use_msix);
+			spin_unlock(&dd->msix_info.msix_lock);
+			dd_dev_err(dd, "Invalid index %lu for GENERAL IRQ\n",
+				   nr);
+			return -EINVAL;
 		}
-		/* using MSI-X */
-		dd->num_msix_entries = total;
-		dd_dev_info(dd, "%u MSI-X interrupts allocated\n", total);
+		snprintf(name, sizeof(name), DRIVER_NAME "_%d", dd->unit);
+		err_info = "general";
+		break;
+	case IRQ_SDMA:
+		snprintf(name, sizeof(name), DRIVER_NAME "_%d sdma%d",
+			 dd->unit, idx);
+		err_info = "sdma";
+		break;
+	case IRQ_RCVCTXT:
+		snprintf(name, sizeof(name), DRIVER_NAME "_%d kctxt%d",
+			 dd->unit, idx);
+		err_info = "receive context";
+		break;
+	case IRQ_OTHER:
+	default:
+		return -EINVAL;
 	}
+	name[sizeof(name) - 1] = 0;
 
-	/* mask all interrupts */	set_intr_state(dd, 0);
-	/* clear all pending interrupts */
-	clear_all_interrupts(dd);
+	irq = pci_irq_vector(dd->pcidev, nr);
+	ret = pci_request_irq(dd->pcidev, nr, handler, thread, arg, name);
+	if (ret) {
+		dd_dev_err(dd,
+			   "%s: request for IRQ %d failed, MSIx %d, err %d\n",
+			   err_info, irq, idx, ret);
+		spin_lock(&dd->msix_info.msix_lock);
+		__clear_bit(nr, dd->msix_info.in_use_msix);
+		spin_unlock(&dd->msix_info.msix_lock);
+		return ret;
+	}
 
-	/* reset general handler mask, chip MSI-X mappings */
-	reset_interrupts(dd);
+	/*
+	 * assign arg after pci_request_irq call, so it will be
+	 * cleaned up
+	 */
+	me = &dd->msix_info.msix_entries[nr];
+	me->irq = irq;
+	me->arg = arg;
+	me->type = type;
 
-	ret = request_msix_irqs(dd);
+	/* This is a request, so a failure is not fatal */
+	ret = hfi1_get_irq_affinity(dd, me);
 	if (ret)
-		goto fail;
-
-	return 0;
+		dd_dev_err(dd, "unable to pin IRQ %d\n", ret);
 
-fail:
-	hfi1_clean_up_interrupts(dd);
-	return ret;
+	return nr;
 }
 
-int request_msix_irqs(struct hfi1_devdata *dd)
+/**
+ * msix_request_rcd_irq() - Helper function for RCVAVAIL IRQs
+ * @rcd: valid rcd context
+ *
+ */
+int msix_request_rcd_irq(struct hfi1_ctxtdata *rcd)
 {
-	int first_general, last_general;
-	int first_sdma, last_sdma;
-	int first_rx, last_rx;
-	int i, ret = 0;
-
-	/* calculate the ranges we are going to use */
-	first_general = 0;
-	last_general = first_general + 1;
-	first_sdma = last_general;
-	last_sdma = first_sdma + dd->num_sdma;
-	first_rx = last_sdma;
-	last_rx = first_rx + dd->n_krcv_queues + dd->num_vnic_contexts;
-
-	/* VNIC MSIx interrupts get mapped when VNIC contexts are created */
-	dd->first_dyn_msix_idx = first_rx + dd->n_krcv_queues;
+	int nr;
+
+	nr = msix_request_irq(rcd->dd, rcd, receive_context_interrupt,
+			      receive_context_thread, rcd->ctxt, IRQ_RCVCTXT);
+	if (nr < 0)
+		return nr;
 
 	/*
-	 * Sanity check - the code expects all SDMA chip source
-	 * interrupts to be in the same CSR, starting at bit 0.  Verify
-	 * that this is true by checking the bit location of the start.
+	 * Set the interrupt register and mask for this
+	 * context's interrupt.
 	 */
-	BUILD_BUG_ON(IS_SDMA_START % 64);
-
-	for (i = 0; i < dd->num_msix_entries; i++) {
-		struct hfi1_msix_entry *me = &dd->msix_entries[i];
-		const char *err_info;
-		irq_handler_t handler;
-		irq_handler_t thread = NULL;
-		void *arg = NULL;
-		int idx;
-		struct hfi1_ctxtdata *rcd = NULL;
-		struct sdma_engine *sde = NULL;
-		char name[MAX_NAME_SIZE];
-
-		/* obtain the arguments to pci_request_irq */
-		if (first_general <= i && i < last_general) {
-			idx = i - first_general;
-			handler = general_interrupt;
-			arg = dd;
-			snprintf(name, sizeof(name),
-				 DRIVER_NAME "_%d", dd->unit);
-			err_info = "general";
-			me->type = IRQ_GENERAL;
-		} else if (first_sdma <= i && i < last_sdma) {
-			idx = i - first_sdma;
-			sde = &dd->per_sdma[idx];
-			handler = sdma_interrupt;
-			arg = sde;
-			snprintf(name, sizeof(name),
-				 DRIVER_NAME "_%d sdma%d", dd->unit, idx);
-			err_info = "sdma";
-			remap_sdma_interrupts(dd, idx, i);
-			me->type = IRQ_SDMA;
-		} else if (first_rx <= i && i < last_rx) {
-			idx = i - first_rx;
-			rcd = hfi1_rcd_get_by_index_safe(dd, idx);
-			if (rcd) {
-				/*
-				 * Set the interrupt register and mask for this
-				 * context's interrupt.
-				 */
-				rcd->ireg = (IS_RCVAVAIL_START + idx) / 64;
-				rcd->imask = ((u64)1) <<
-					  ((IS_RCVAVAIL_START + idx) % 64);
-				handler = receive_context_interrupt;
-				thread = receive_context_thread;
-				arg = rcd;
-				snprintf(name, sizeof(name),
-					 DRIVER_NAME "_%d kctxt%d",
-					 dd->unit, idx);
-				err_info = "receive context";
-				remap_intr(dd, IS_RCVAVAIL_START + idx, i);
-				me->type = IRQ_RCVCTXT;
-				rcd->msix_intr = i;
-				hfi1_rcd_put(rcd);
-			}
-		} else {
-			/* not in our expected range - complain, then
-			 * ignore it
-			 */
-			dd_dev_err(dd,
-				   "Unexpected extra MSI-X interrupt %d\n", i);
-			continue;
-		}
-		/* no argument, no interrupt */
-		if (!arg)
-			continue;
-		/* make sure the name is terminated */
-		name[sizeof(name) - 1] = 0;
-		me->irq = pci_irq_vector(dd->pcidev, i);
-		ret = pci_request_irq(dd->pcidev, i, handler, thread, arg,
-				      name);
-		if (ret) {
-			dd_dev_err(dd,
-				   "unable to allocate %s interrupt, irq %d, index %d, err %d\n",
-				   err_info, me->irq, idx, ret);
-			return ret;
-		}
-		/*
-		 * assign arg after pci_request_irq call, so it will be
-		 * cleaned up
-		 */
-		me->arg = arg;
-
-		ret = hfi1_get_irq_affinity(dd, me);
-		if (ret)
-			dd_dev_err(dd, "unable to pin IRQ %d\n", ret);
-	}
+	rcd->ireg = (IS_RCVAVAIL_START + rcd->ctxt) / 64;
+	rcd->imask = ((u64)1) << ((IS_RCVAVAIL_START + rcd->ctxt) % 64);
+	rcd->msix_intr = nr;
+	remap_intr(rcd->dd, IS_RCVAVAIL_START + rcd->ctxt, nr);
 
-	return ret;
+	return 0;
 }
 
-void hfi1_vnic_synchronize_irq(struct hfi1_devdata *dd)
+/**
+ * msix_request_smda_ira() - Helper for getting SDMA IRQ resources
+ * @sde: valid sdma engine
+ *
+ */
+int msix_request_sdma_irq(struct sdma_engine *sde)
 {
-	int i;
+	int nr;
 
-	for (i = 0; i < dd->vnic.num_ctxt; i++) {
-		struct hfi1_ctxtdata *rcd = dd->vnic.ctxt[i];
-		struct hfi1_msix_entry *me = &dd->msix_entries[rcd->msix_intr];
+	nr = msix_request_irq(sde->dd, sde, sdma_interrupt, NULL,
+			      sde->this_idx, IRQ_SDMA);
+	if (nr < 0)
+		return nr;
+	sde->msix_intr = nr;
+	remap_sdma_interrupts(sde->dd, sde->this_idx, nr);
 
-		synchronize_irq(me->irq);
-	}
+	return 0;
 }
 
-void hfi1_reset_vnic_msix_info(struct hfi1_ctxtdata *rcd)
+/**
+ * msix_request_irqs() - Allocate all MSIx IRQs
+ * @dd: valid devdata structure
+ *
+ * Helper function to request the used MSIx IRQs.
+ *
+ */
+int msix_request_irqs(struct hfi1_devdata *dd)
 {
-	struct hfi1_devdata *dd = rcd->dd;
-	struct hfi1_msix_entry *me = &dd->msix_entries[rcd->msix_intr];
+	int i;
+	int ret;
 
-	if (!me->arg) /* => no irq, no affinity */
-		return;
+	ret = msix_request_irq(dd, dd, general_interrupt, NULL, 0, IRQ_GENERAL);
+	if (ret < 0)
+		return ret;
 
-	hfi1_put_irq_affinity(dd, me);
-	pci_free_irq(dd->pcidev, rcd->msix_intr, me->arg);
+	for (i = 0; i < dd->num_sdma; i++) {
+		struct sdma_engine *sde = &dd->per_sdma[i];
 
-	me->arg = NULL;
+		ret = msix_request_sdma_irq(sde);
+		if (ret)
+			return ret;
+	}
+
+	for (i = 0; i < dd->n_krcv_queues; i++) {
+		struct hfi1_ctxtdata *rcd = hfi1_rcd_get_by_index_safe(dd, i);
+
+		if (rcd)
+			ret = msix_request_rcd_irq(rcd);
+		hfi1_rcd_put(rcd);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
 }
 
-void hfi1_set_vnic_msix_info(struct hfi1_ctxtdata *rcd)
+/**
+ * msix_free_irq() - Free the specified MSIx resources and IRQ
+ * @dd: valid devdata
+ * @msix_intr: MSIx vector to free.
+ *
+ */
+void msix_free_irq(struct hfi1_devdata *dd, u8 msix_intr)
 {
-	struct hfi1_devdata *dd = rcd->dd;
 	struct hfi1_msix_entry *me;
-	int idx = rcd->ctxt;
-	void *arg = rcd;
-	int ret;
 
-	rcd->msix_intr = dd->vnic.msix_idx++;
-	me = &dd->msix_entries[rcd->msix_intr];
+	if (msix_intr >= dd->msix_info.max_requested)
+		return;
 
-	/*
-	 * Set the interrupt register and mask for this
-	 * context's interrupt.
-	 */
-	rcd->ireg = (IS_RCVAVAIL_START + idx) / 64;
-	rcd->imask = ((u64)1) <<
-		  ((IS_RCVAVAIL_START + idx) % 64);
-	me->type = IRQ_RCVCTXT;
-	me->irq = pci_irq_vector(dd->pcidev, rcd->msix_intr);
-	remap_intr(dd, IS_RCVAVAIL_START + idx, rcd->msix_intr);
-
-	ret = pci_request_irq(dd->pcidev, rcd->msix_intr,
-			      receive_context_interrupt,
-			      receive_context_thread, arg,
-			      DRIVER_NAME "_%d kctxt%d", dd->unit, idx);
-	if (ret) {
-		dd_dev_err(dd, "vnic irq request (irq %d, idx %d) fail %d\n",
-			   me->irq, idx, ret);
+	me = &dd->msix_info.msix_entries[msix_intr];
+
+	if (!me->arg) /* => no irq, no affinity */
 		return;
-	}
-	/*
-	 * assign arg after pci_request_irq call, so it will be
-	 * cleaned up
-	 */
-	me->arg = arg;
 
-	ret = hfi1_get_irq_affinity(dd, me);
-	if (ret) {
-		dd_dev_err(dd,
-			   "unable to pin IRQ %d\n", ret);
-		pci_free_irq(dd->pcidev, rcd->msix_intr, me->arg);
-	}
+	hfi1_put_irq_affinity(dd, me);
+	pci_free_irq(dd->pcidev, msix_intr, me->arg);
+
+	me->arg = NULL;
+
+	spin_lock(&dd->msix_info.msix_lock);
+	__clear_bit(msix_intr, dd->msix_info.in_use_msix);
+	spin_unlock(&dd->msix_info.msix_lock);
 }
 
 /**
- * hfi1_clean_up_interrupts() - Free all IRQ resources
+ * hfi1_clean_up_msix_interrupts() - Free all MSIx IRQ resources
  * @dd: valid device data data structure
  *
  * Free the MSIx and associated PCI resources, if they have been allocated.
  */
-void hfi1_clean_up_interrupts(struct hfi1_devdata *dd)
+void msix_clean_up_interrupts(struct hfi1_devdata *dd)
 {
 	int i;
-	struct hfi1_msix_entry *me = dd->msix_entries;
+	struct hfi1_msix_entry *me = dd->msix_info.msix_entries;
 
 	/* remove irqs - must happen before disabling/turning off */
-	for (i = 0; i < dd->num_msix_entries; i++, me++) {
-		if (!me->arg) /* => no irq, no affinity */
-			continue;
-		hfi1_put_irq_affinity(dd, me);
-		pci_free_irq(dd->pcidev, i, me->arg);
-	}
+	for (i = 0; i < dd->msix_info.max_requested; i++, me++)
+		msix_free_irq(dd, i);
 
 	/* clean structures */
-	kfree(dd->msix_entries);
-	dd->msix_entries = NULL;
-	dd->num_msix_entries = 0;
+	kfree(dd->msix_info.msix_entries);
+	dd->msix_info.msix_entries = NULL;
+	dd->msix_info.max_requested = 0;
 
 	pci_free_irq_vectors(dd->pcidev);
 }
+
+/**
+ * msix_vnic_syncrhonize_irq() - Vnic IRQ synchronize
+ * @dd: valid devdata
+ */
+void msix_vnic_synchronize_irq(struct hfi1_devdata *dd)
+{
+	int i;
+
+	for (i = 0; i < dd->vnic.num_ctxt; i++) {
+		struct hfi1_ctxtdata *rcd = dd->vnic.ctxt[i];
+		struct hfi1_msix_entry *me;
+
+		me = &dd->msix_info.msix_entries[rcd->msix_intr];
+
+		synchronize_irq(me->irq);
+	}
+}

drivers/infiniband/hw/hfi1/msix.h

@@ -51,14 +51,14 @@
 #include "hfi.h"
 
 /* MSIx interface */
-int request_msix(struct hfi1_devdata *dd, u32 msireq);
-int set_up_interrupts(struct hfi1_devdata *dd);
-int request_msix_irqs(struct hfi1_devdata *dd);
-void hfi1_clean_up_interrupts(struct hfi1_devdata *dd);
+int msix_initialize(struct hfi1_devdata *dd);
+int msix_request_irqs(struct hfi1_devdata *dd);
+void msix_clean_up_interrupts(struct hfi1_devdata *dd);
+int msix_request_rcd_irq(struct hfi1_ctxtdata *rcd);
+int msix_request_sdma_irq(struct sdma_engine *sde);
+void msix_free_irq(struct hfi1_devdata *dd, u8 msix_intr);
 
 /* VNIC interface */
-void hfi1_vnic_synchronize_irq(struct hfi1_devdata *dd);
-void hfi1_set_vnic_msix_info(struct hfi1_ctxtdata *rcd);
-void hfi1_reset_vnic_msix_info(struct hfi1_ctxtdata *rcd);
+void msix_vnic_synchronize_irq(struct hfi1_devdata *dd);
 
 #endif

drivers/infiniband/hw/hfi1/sdma.h

@@ -405,6 +405,7 @@ struct sdma_engine {
 	struct list_head flushlist;
 	struct cpumask cpu_mask;
 	struct kobject kobj;
+	u32 msix_intr;
 };
 
 int sdma_init(struct hfi1_devdata *dd, u8 port);

drivers/infiniband/hw/hfi1/vnic_main.c

@@ -120,7 +120,7 @@ static int allocate_vnic_ctxt(struct hfi1_devdata *dd,
 	uctxt->seq_cnt = 1;
 	uctxt->is_vnic = true;
 
-	hfi1_set_vnic_msix_info(uctxt);
+	msix_request_rcd_irq(uctxt);
 
 	hfi1_stats.sps_ctxts++;
 	dd_dev_dbg(dd, "created vnic context %d\n", uctxt->ctxt);
@@ -135,8 +135,6 @@ static void deallocate_vnic_ctxt(struct hfi1_devdata *dd,
 	dd_dev_dbg(dd, "closing vnic context %d\n", uctxt->ctxt);
 	flush_wc();
 
-	hfi1_reset_vnic_msix_info(uctxt);
-
 	/*
 	 * Disable receive context and interrupt available, reset all
 	 * RcvCtxtCtrl bits to default values.
@@ -148,6 +146,10 @@ static void deallocate_vnic_ctxt(struct hfi1_devdata *dd,
 		     HFI1_RCVCTRL_NO_RHQ_DROP_DIS |
 		     HFI1_RCVCTRL_NO_EGR_DROP_DIS, uctxt);
 
+	/* msix_intr will always be > 0, only clean up if this is true */
+	if (uctxt->msix_intr)
+		msix_free_irq(dd, uctxt->msix_intr);
+
 	uctxt->event_flags = 0;
 
 	hfi1_clear_tids(uctxt);
@@ -626,7 +628,7 @@ static void hfi1_vnic_down(struct hfi1_vnic_vport_info *vinfo)
 	idr_remove(&dd->vnic.vesw_idr, vinfo->vesw_id);
 
 	/* ensure irqs see the change */
-	hfi1_vnic_synchronize_irq(dd);
+	msix_vnic_synchronize_irq(dd);
 
 	/* remove unread skbs */
 	for (i = 0; i < vinfo->num_rx_q; i++) {
@@ -690,8 +692,6 @@ static int hfi1_vnic_init(struct hfi1_vnic_vport_info *vinfo)
 		rc = hfi1_vnic_txreq_init(dd);
 		if (rc)
 			goto txreq_fail;
-
-		dd->vnic.msix_idx = dd->first_dyn_msix_idx;
 	}
 
 	for (i = dd->vnic.num_ctxt; i < vinfo->num_rx_q; i++) {