Fix oinkmaster patch.

[ipfire-2.x.git] / src / patches / suse-2.6.27.39 / patches.drivers / 0001-IB-ehca-Fix-problem-with-max-number-of-QPs-and-CQs.patch

From: Stefan Roscher <stefan.roscher@de.ibm.com>
Subject: Fix problem with max number of QPs and CQs
References: bnc#441619

Because ehca adapters can differ in the maximum number of QPs and CQs
we have to save the maximum number of these ressources per adapter and not
globally per ehca driver. This fix introduces 2 new members to the shca
structure to store the maximum value for QPs and CQs per adapter.
The module parameters are now used as initial values for those variables.
If a user selects an invalid number of CQs or QPs we don't print an error any
longer, instead we will inform the user with a warning and set the values to
the respective maximum supported by the HW.

Acked-by: John Jolly <jjolly@novell.com>

Index: linux-2.6.27/drivers/infiniband/hw/ehca/ehca_classes.h
===================================================================
--- linux-2.6.27.orig/drivers/infiniband/hw/ehca/ehca_classes.h
+++ linux-2.6.27/drivers/infiniband/hw/ehca/ehca_classes.h
@@ -128,6 +128,8 @@ struct ehca_shca {
 	/* MR pgsize: bit 0-3 means 4K, 64K, 1M, 16M respectively */
 	u32 hca_cap_mr_pgsize;
 	int max_mtu;
+	int max_num_qps;
+	int max_num_cqs;
 	atomic_t num_cqs;
 	atomic_t num_qps;
 };
Index: linux-2.6.27/drivers/infiniband/hw/ehca/ehca_cq.c
===================================================================
--- linux-2.6.27.orig/drivers/infiniband/hw/ehca/ehca_cq.c
+++ linux-2.6.27/drivers/infiniband/hw/ehca/ehca_cq.c
@@ -132,9 +132,9 @@ struct ib_cq *ehca_create_cq(struct ib_d
 	if (cqe >= 0xFFFFFFFF - 64 - additional_cqe)
 		return ERR_PTR(-EINVAL);
 
-	if (!atomic_add_unless(&shca->num_cqs, 1, ehca_max_cq)) {
+	if (!atomic_add_unless(&shca->num_cqs, 1, shca->max_num_cqs)) {
 		ehca_err(device, "Unable to create CQ, max number of %i "
-			"CQs reached.", ehca_max_cq);
+			"CQs reached.", shca->max_num_cqs);
 		ehca_err(device, "To increase the maximum number of CQs "
 			"use the number_of_cqs module parameter.\n");
 		return ERR_PTR(-ENOSPC);
Index: linux-2.6.27/drivers/infiniband/hw/ehca/ehca_main.c
===================================================================
--- linux-2.6.27.orig/drivers/infiniband/hw/ehca/ehca_main.c
+++ linux-2.6.27/drivers/infiniband/hw/ehca/ehca_main.c
@@ -368,22 +368,23 @@ static int ehca_sense_attributes(struct 
 			shca->hca_cap_mr_pgsize |= pgsize_map[i + 1];
 
 	/* Set maximum number of CQs and QPs to calculate EQ size */
-	if (ehca_max_qp == -1)
-		ehca_max_qp = min_t(int, rblock->max_qp, EHCA_MAX_NUM_QUEUES);
-	else if (ehca_max_qp < 1 || ehca_max_qp > rblock->max_qp) {
-		ehca_gen_err("Requested number of QPs is out of range (1 - %i) "
-			"specified by HW", rblock->max_qp);
-		ret = -EINVAL;
-		goto sense_attributes1;
-	}
-
-	if (ehca_max_cq == -1)
-		ehca_max_cq = min_t(int, rblock->max_cq, EHCA_MAX_NUM_QUEUES);
-	else if (ehca_max_cq < 1 || ehca_max_cq > rblock->max_cq) {
-		ehca_gen_err("Requested number of CQs is out of range (1 - %i) "
-			"specified by HW", rblock->max_cq);
-		ret = -EINVAL;
-		goto sense_attributes1;
+	if (shca->max_num_qps == -1)
+		shca->max_num_qps = min_t(int, rblock->max_qp,
+					  EHCA_MAX_NUM_QUEUES);
+	else if (shca->max_num_qps < 1 || shca->max_num_qps > rblock->max_qp) {
+		ehca_gen_warn("The requested number of QPs is out of range "
+			      "(1 - %i) specified by HW. Value is set to %i",
+			      rblock->max_qp, rblock->max_qp);
+		shca->max_num_qps = rblock->max_qp;
+	}
+
+	if (shca->max_num_cqs == -1)
+		shca->max_num_cqs = min_t(int, rblock->max_cq,
+					  EHCA_MAX_NUM_QUEUES);
+	else if (shca->max_num_cqs < 1 || shca->max_num_cqs > rblock->max_cq) {
+		ehca_gen_warn("The requested number of CQs is out of range "
+			      "(1 - %i) specified by HW. Value is set to %i",
+			      rblock->max_cq, rblock->max_cq);
 	}
 
 	/* query max MTU from first port -- it's the same for all ports */
@@ -735,9 +736,13 @@ static int __devinit ehca_probe(struct o
 		ehca_gen_err("Cannot allocate shca memory.");
 		return -ENOMEM;
 	}
+
 	mutex_init(&shca->modify_mutex);
 	atomic_set(&shca->num_cqs, 0);
 	atomic_set(&shca->num_qps, 0);
+	shca->max_num_qps = ehca_max_qp;
+	shca->max_num_cqs = ehca_max_cq;
+
 	for (i = 0; i < ARRAY_SIZE(shca->sport); i++)
 		spin_lock_init(&shca->sport[i].mod_sqp_lock);
 
@@ -757,7 +762,7 @@ static int __devinit ehca_probe(struct o
 		goto probe1;
 	}
 
-	eq_size = 2 * ehca_max_cq + 4 * ehca_max_qp;
+	eq_size = 2 * shca->max_num_cqs + 4 * shca->max_num_qps;
 	/* create event queues */
 	ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, eq_size);
 	if (ret) {
Index: linux-2.6.27/drivers/infiniband/hw/ehca/ehca_qp.c
===================================================================
--- linux-2.6.27.orig/drivers/infiniband/hw/ehca/ehca_qp.c
+++ linux-2.6.27/drivers/infiniband/hw/ehca/ehca_qp.c
@@ -465,9 +465,9 @@ static struct ehca_qp *internal_create_q
 	u32 swqe_size = 0, rwqe_size = 0, ib_qp_num;
 	unsigned long flags;
 
-	if (!atomic_add_unless(&shca->num_qps, 1, ehca_max_qp)) {
+	if (!atomic_add_unless(&shca->num_qps, 1, shca->max_num_qps)) {
 		ehca_err(pd->device, "Unable to create QP, max number of %i "
-			 "QPs reached.", ehca_max_qp);
+			 "QPs reached.", shca->max_num_qps);
 		ehca_err(pd->device, "To increase the maximum number of QPs "
 			 "use the number_of_qps module parameter.\n");
 		return ERR_PTR(-ENOSPC);