IB/hfi1: Remove rcvhdrq_size

The usage of this ctxt data field is not hot path and the value can be
computed on demand to cut down the ctxtdata bloat.
Reviewed-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/hw/hfi1/chip.c

@@ -11857,7 +11857,7 @@ void hfi1_rcvctrl(struct hfi1_devdata *dd, unsigned int op,
 		 * sequence numbers could land exactly on the same spot.
 		 * E.g. a rcd restart before the receive header wrapped.
 		 */
-		memset(rcd->rcvhdrq, 0, rcd->rcvhdrq_size);
+		memset(rcd->rcvhdrq, 0, rcvhdrq_size(rcd));
 
 		/* starting timeout */
 		rcd->rcvavail_timeout = dd->rcv_intr_timeout_csr;

drivers/infiniband/hw/hfi1/file_ops.c

@@ -411,7 +411,7 @@ static int hfi1_file_mmap(struct file *fp, struct vm_area_struct *vma)
 		mapio = 1;
 		break;
 	case RCV_HDRQ:
-		memlen = uctxt->rcvhdrq_size;
+		memlen = rcvhdrq_size(uctxt);
 		memvirt = uctxt->rcvhdrq;
 		break;
 	case RCV_EGRBUF: {
@@ -521,7 +521,7 @@ static int hfi1_file_mmap(struct file *fp, struct vm_area_struct *vma)
 		break;
 	case SUBCTXT_RCV_HDRQ:
 		memaddr = (u64)uctxt->subctxt_rcvhdr_base;
-		memlen = uctxt->rcvhdrq_size * uctxt->subctxt_cnt;
+		memlen = rcvhdrq_size(uctxt) * uctxt->subctxt_cnt;
 		flags |= VM_IO | VM_DONTEXPAND;
 		vmf = 1;
 		break;
@@ -1040,7 +1040,7 @@ static int setup_subctxt(struct hfi1_ctxtdata *uctxt)
 		return -ENOMEM;
 
 	/* We can take the size of the RcvHdr Queue from the master */
-	uctxt->subctxt_rcvhdr_base = vmalloc_user(uctxt->rcvhdrq_size *
+	uctxt->subctxt_rcvhdr_base = vmalloc_user(rcvhdrq_size(uctxt) *
 						  num_subctxts);
 	if (!uctxt->subctxt_rcvhdr_base) {
 		ret = -ENOMEM;

drivers/infiniband/hw/hfi1/hfi.h

@@ -201,8 +201,6 @@ struct hfi1_ctxtdata {
 	volatile __le64 *rcvhdrtail_kvaddr;
 	/* when waiting for rcv or pioavail */
 	wait_queue_head_t wait;
-	/* rcvhdrq size (for freeing) */
-	size_t rcvhdrq_size;
 	/* number of rcvhdrq entries */
 	u16 rcvhdrq_cnt;
 	/* size of each of the rcvhdrq entries */
@@ -324,6 +322,19 @@ struct hfi1_ctxtdata {
 	u8 vnic_q_idx;
 };
 
+/**
+ * rcvhdrq_size - return total size in bytes for header queue
+ * @rcd: the receive context
+ *
+ * rcvhdrqentsize is in DWs, so we have to convert to bytes
+ *
+ */
+static inline u32 rcvhdrq_size(struct hfi1_ctxtdata *rcd)
+{
+	return PAGE_ALIGN(rcd->rcvhdrq_cnt *
+			  rcd->rcvhdrqentsize * sizeof(u32));
+}
+
 /*
  * Represents a single packet at a high level. Put commonly computed things in
  * here so we do not have to keep doing them over and over. The rule of thumb is

drivers/infiniband/hw/hfi1/init.c

@@ -1129,7 +1129,7 @@ void hfi1_free_ctxtdata(struct hfi1_devdata *dd, struct hfi1_ctxtdata *rcd)
 		return;
 
 	if (rcd->rcvhdrq) {
-		dma_free_coherent(&dd->pcidev->dev, rcd->rcvhdrq_size,
+		dma_free_coherent(&dd->pcidev->dev, rcvhdrq_size(rcd),
 				  rcd->rcvhdrq, rcd->rcvhdrq_dma);
 		rcd->rcvhdrq = NULL;
 		if (rcd->rcvhdrtail_kvaddr) {
@@ -1840,12 +1840,7 @@ int hfi1_create_rcvhdrq(struct hfi1_devdata *dd, struct hfi1_ctxtdata *rcd)
 	if (!rcd->rcvhdrq) {
 		gfp_t gfp_flags;
 
-		/*
-		 * rcvhdrqentsize is in DWs, so we have to convert to bytes
-		 * (* sizeof(u32)).
-		 */
-		amt = PAGE_ALIGN(rcd->rcvhdrq_cnt * rcd->rcvhdrqentsize *
-				 sizeof(u32));
+		amt = rcvhdrq_size(rcd);
 
 		if (rcd->ctxt < dd->first_dyn_alloc_ctxt || rcd->is_vnic)
 			gfp_flags = GFP_KERNEL;
@@ -1870,8 +1865,6 @@ int hfi1_create_rcvhdrq(struct hfi1_devdata *dd, struct hfi1_ctxtdata *rcd)
 			if (!rcd->rcvhdrtail_kvaddr)
 				goto bail_free;
 		}
-
-		rcd->rcvhdrq_size = amt;
 	}
 	/*
 	 * These values are per-context: