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From: Dennis Dalessandro <dennis.dalessandro@intel.com>
To: jgg@ziepe.ca, dledford@redhat.com
Cc: linux-rdma@vger.kernel.org,
	"Michael J. Ruhl" <michael.j.ruhl@intel.com>,
	Mike Marciniszyn <mike.marciniszyn@intel.com>,
	Grzegorz Andrejczuk <grzegorz.andrejczuk@intel.com>,
	Kaike Wan <kaike.wan@intel.com>
Subject: [PATCH for-next 6/9] IB/hfi1: Decouple IRQ name from type
Date: Mon, 06 Jan 2020 08:42:16 -0500
Message-ID: <20200106134216.119356.44478.stgit@awfm-01.aw.intel.com> (raw)
In-Reply-To: <20200106133845.119356.20115.stgit@awfm-01.aw.intel.com>

From: Grzegorz Andrejczuk <grzegorz.andrejczuk@intel.com>

IRQ name was connected to IRQ type, this is not sufficient and it would
be better to use name as argument to msix_request_irq instead of
assigning it to variables when function is called.

Index argument was required to generate name and now it can be removed.

To generate name correctly helpers function were added and updated.

Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Reviewed-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: Grzegorz Andrejczuk <grzegorz.andrejczuk@intel.com>
Signed-off-by: Kaike Wan <kaike.wan@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
---
 drivers/infiniband/hw/hfi1/msix.c |  106 ++++++++++++++++++++-----------------
 drivers/infiniband/hw/hfi1/msix.h |    1 
 2 files changed, 59 insertions(+), 48 deletions(-)

diff --git a/drivers/infiniband/hw/hfi1/msix.c b/drivers/infiniband/hw/hfi1/msix.c
index d920b16..4a620cf 100644
--- a/drivers/infiniband/hw/hfi1/msix.c
+++ b/drivers/infiniband/hw/hfi1/msix.c
@@ -115,13 +115,11 @@ int msix_initialize(struct hfi1_devdata *dd)
  */
 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)
+			    enum irq_type type, const char *name)
 {
 	unsigned long nr;
 	int irq;
 	int ret;
-	const char *err_info;
-	char name[MAX_NAME_SIZE];
 	struct hfi1_msix_entry *me;
 
 	/* Allocate an MSIx vector */
@@ -135,43 +133,15 @@ static int msix_request_irq(struct hfi1_devdata *dd, void *arg,
 	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;
-		}
-		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:
+	if (type < IRQ_SDMA && type >= IRQ_OTHER)
 		return -EINVAL;
-	}
-	name[sizeof(name) - 1] = 0;
 
 	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);
+			   "%s: request for IRQ %d failed, MSIx %lu, err %d\n",
+			   name, irq, nr, ret);
 		spin_lock(&dd->msix_info.msix_lock);
 		__clear_bit(nr, dd->msix_info.in_use_msix);
 		spin_unlock(&dd->msix_info.msix_lock);
@@ -195,17 +165,13 @@ static int msix_request_irq(struct hfi1_devdata *dd, void *arg,
 	return nr;
 }
 
-/**
- * msix_request_rcd_irq() - Helper function for RCVAVAIL IRQs
- * @rcd: valid rcd context
- *
- */
-int msix_request_rcd_irq(struct hfi1_ctxtdata *rcd)
+static int msix_request_rcd_irq_common(struct hfi1_ctxtdata *rcd,
+				       irq_handler_t handler,
+				       irq_handler_t thread,
+				       const char *name)
 {
-	int nr;
-
-	nr = msix_request_irq(rcd->dd, rcd, receive_context_interrupt,
-			      receive_context_thread, rcd->ctxt, IRQ_RCVCTXT);
+	int nr = msix_request_irq(rcd->dd, rcd, handler, thread,
+				  IRQ_RCVCTXT, name);
 	if (nr < 0)
 		return nr;
 
@@ -222,6 +188,22 @@ int msix_request_rcd_irq(struct hfi1_ctxtdata *rcd)
 }
 
 /**
+ * msix_request_rcd_irq() - Helper function for RCVAVAIL IRQs
+ * @rcd: valid rcd context
+ *
+ */
+int msix_request_rcd_irq(struct hfi1_ctxtdata *rcd)
+{
+	char name[MAX_NAME_SIZE];
+
+	snprintf(name, sizeof(name), DRIVER_NAME "_%d kctxt%d",
+		 rcd->dd->unit, rcd->ctxt);
+
+	return msix_request_rcd_irq_common(rcd, receive_context_interrupt,
+					   receive_context_thread, name);
+}
+
+/**
  * msix_request_smda_ira() - Helper for getting SDMA IRQ resources
  * @sde: valid sdma engine
  *
@@ -229,9 +211,12 @@ int msix_request_rcd_irq(struct hfi1_ctxtdata *rcd)
 int msix_request_sdma_irq(struct sdma_engine *sde)
 {
 	int nr;
+	char name[MAX_NAME_SIZE];
 
+	snprintf(name, sizeof(name), DRIVER_NAME "_%d sdma%d",
+		 sde->dd->unit, sde->this_idx);
 	nr = msix_request_irq(sde->dd, sde, sdma_interrupt, NULL,
-			      sde->this_idx, IRQ_SDMA);
+			      IRQ_SDMA, name);
 	if (nr < 0)
 		return nr;
 	sde->msix_intr = nr;
@@ -241,6 +226,32 @@ int msix_request_sdma_irq(struct sdma_engine *sde)
 }
 
 /**
+ * msix_request_general_irq(void) - Helper for getting general IRQ
+ * resources
+ * @dd: valid device data
+ */
+int msix_request_general_irq(struct hfi1_devdata *dd)
+{
+	int nr;
+	char name[MAX_NAME_SIZE];
+
+	snprintf(name, sizeof(name), DRIVER_NAME "_%d", dd->unit);
+	nr = msix_request_irq(dd, dd, general_interrupt, NULL, IRQ_GENERAL,
+			      name);
+	if (nr < 0)
+		return nr;
+
+	/* general interrupt must be MSIx vector 0 */
+	if (nr) {
+		msix_free_irq(dd, (u8)nr);
+		dd_dev_err(dd, "Invalid index %d for GENERAL IRQ\n", nr);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+/**
  * enable_sdma_src() - Helper to enable SDMA IRQ srcs
  * @dd: valid devdata structure
  * @i: index of SDMA engine
@@ -265,10 +276,9 @@ static void enable_sdma_srcs(struct hfi1_devdata *dd, int i)
 int msix_request_irqs(struct hfi1_devdata *dd)
 {
 	int i;
-	int ret;
+	int ret = msix_request_general_irq(dd);
 
-	ret = msix_request_irq(dd, dd, general_interrupt, NULL, 0, IRQ_GENERAL);
-	if (ret < 0)
+	if (ret)
 		return ret;
 
 	for (i = 0; i < dd->num_sdma; i++) {
diff --git a/drivers/infiniband/hw/hfi1/msix.h b/drivers/infiniband/hw/hfi1/msix.h
index a514881..1a02ab7 100644
--- a/drivers/infiniband/hw/hfi1/msix.h
+++ b/drivers/infiniband/hw/hfi1/msix.h
@@ -54,6 +54,7 @@
 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_general_irq(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);


  parent reply index

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-06 13:41 [PATCH for-next 0/9] Clean ups, refactror, additions Dennis Dalessandro
2020-01-06 13:41 ` [PATCH for-next 1/9] IB/hfi1: Move chip specific functions to chip.c Dennis Dalessandro
2020-01-06 13:41 ` [PATCH for-next 2/9] IB/hfi1: Add fast and slow handlers for receive context Dennis Dalessandro
2020-01-06 13:41 ` [PATCH for-next 3/9] IB/hfi1: Move common receive IRQ code to function Dennis Dalessandro
2020-01-06 13:42 ` [PATCH for-next 4/9] IB/hfi1: IB/hfi1: Add an API to handle special case drop Dennis Dalessandro
2020-01-06 13:42 ` [PATCH for-next 5/9] IB/hfi1: Create API for auto activate Dennis Dalessandro
2020-01-06 13:42 ` Dennis Dalessandro [this message]
2020-01-06 13:42 ` [PATCH for-next 7/9] IB/hfi1: Return void in packet receiving functions Dennis Dalessandro
2020-01-06 13:42 ` [PATCH for-next 8/9] IB/hfi1: Add software counter for ctxt0 seq drop Dennis Dalessandro
2020-01-06 13:42 ` [PATCH for-next 9/9] IB/hfi1: Add RcvShortLengthErrCnt to hfi1stats Dennis Dalessandro
2020-01-06 13:44 ` [PATCH for-next 0/9] Clean ups, refactror, additions Dennis Dalessandro
2020-01-10 15:15 ` Jason Gunthorpe

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