4 files changed, 65 insertions, 61 deletions

diff --git a/drivers/infiniband/hw/mthca/mthca_cmd.c b/drivers/infiniband/hw/mthca/mthca_cmd.c
index acc95892713..6966f943f44 100644
--- a/drivers/infiniband/hw/mthca/mthca_cmd.c
+++ b/drivers/infiniband/hw/mthca/mthca_cmd.c
@@ -290,6 +290,12 @@ static int mthca_cmd_post(struct mthca_dev *dev,
 		err = mthca_cmd_post_hcr(dev, in_param, out_param, in_modifier,
 					 op_modifier, op, token, event);
 
+	/*
+	 * Make sure that our HCR writes don't get mixed in with
+	 * writes from another CPU starting a FW command.
+	 */
+	mmiowb();
+
 	mutex_unlock(&dev->cmd.hcr_mutex);
 	return err;
 }
diff --git a/drivers/infiniband/hw/mthca/mthca_dev.h b/drivers/infiniband/hw/mthca/mthca_dev.h
index 9bae3cc6060..15aa32eb78b 100644
--- a/drivers/infiniband/hw/mthca/mthca_dev.h
+++ b/drivers/infiniband/hw/mthca/mthca_dev.h
@@ -83,7 +83,7 @@ enum {
 	MTHCA_QP_CONTEXT_SIZE = 0x200,
 	MTHCA_RDB_ENTRY_SIZE  =  0x20,
 	MTHCA_AV_SIZE         =  0x20,
-	MTHCA_MGM_ENTRY_SIZE  =  0x40,
+	MTHCA_MGM_ENTRY_SIZE  = 0x100,
 
 	/* Arbel FW gives us these, but we need them for Tavor */
 	MTHCA_MPT_ENTRY_SIZE  =  0x40,
diff --git a/drivers/infiniband/hw/mthca/mthca_main.c b/drivers/infiniband/hw/mthca/mthca_main.c
index 76fed7545c5..60de6f93869 100644
--- a/drivers/infiniband/hw/mthca/mthca_main.c
+++ b/drivers/infiniband/hw/mthca/mthca_main.c
@@ -61,7 +61,7 @@ MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0");
 
 #ifdef CONFIG_PCI_MSI
 
-static int msi_x = 0;
+static int msi_x = 1;
 module_param(msi_x, int, 0444);
 MODULE_PARM_DESC(msi_x, "attempt to use MSI-X if nonzero");
 
@@ -137,40 +137,23 @@ static const char mthca_version[] __devinitdata =
 
 static int mthca_tune_pci(struct mthca_dev *mdev)
 {
-	int cap;
-	u16 val;
-
 	if (!tune_pci)
 		return 0;
 
 	/* First try to max out Read Byte Count */
-	cap = pci_find_capability(mdev->pdev, PCI_CAP_ID_PCIX);
-	if (cap) {
-		if (pci_read_config_word(mdev->pdev, cap + PCI_X_CMD, &val)) {
-			mthca_err(mdev, "Couldn't read PCI-X command register, "
-				  "aborting.\n");
-			return -ENODEV;
-		}
-		val = (val & ~PCI_X_CMD_MAX_READ) | (3 << 2);
-		if (pci_write_config_word(mdev->pdev, cap + PCI_X_CMD, val)) {
-			mthca_err(mdev, "Couldn't write PCI-X command register, "
-				  "aborting.\n");
+	if (pci_find_capability(mdev->pdev, PCI_CAP_ID_PCIX)) {
+		if (pcix_set_mmrbc(mdev->pdev, pcix_get_max_mmrbc(mdev->pdev))) {
+			mthca_err(mdev, "Couldn't set PCI-X max read count, "
+				"aborting.\n");
 			return -ENODEV;
 		}
 	} else if (!(mdev->mthca_flags & MTHCA_FLAG_PCIE))
 		mthca_info(mdev, "No PCI-X capability, not setting RBC.\n");
 
-	cap = pci_find_capability(mdev->pdev, PCI_CAP_ID_EXP);
-	if (cap) {
-		if (pci_read_config_word(mdev->pdev, cap + PCI_EXP_DEVCTL, &val)) {
-			mthca_err(mdev, "Couldn't read PCI Express device control "
-				  "register, aborting.\n");
-			return -ENODEV;
-		}
-		val = (val & ~PCI_EXP_DEVCTL_READRQ) | (5 << 12);
-		if (pci_write_config_word(mdev->pdev, cap + PCI_EXP_DEVCTL, val)) {
-			mthca_err(mdev, "Couldn't write PCI Express device control "
-				  "register, aborting.\n");
+	if (pci_find_capability(mdev->pdev, PCI_CAP_ID_EXP)) {
+		if (pcie_set_readrq(mdev->pdev, 4096)) {
+			mthca_err(mdev, "Couldn't write PCI Express read request, "
+				"aborting.\n");
 			return -ENODEV;
 		}
 	} else if (mdev->mthca_flags & MTHCA_FLAG_PCIE)
@@ -833,14 +816,19 @@ static int mthca_setup_hca(struct mthca_dev *dev)
 
 	err = mthca_NOP(dev, &status);
 	if (err || status) {
-		mthca_err(dev, "NOP command failed to generate interrupt (IRQ %d), aborting.\n",
-			  dev->mthca_flags & MTHCA_FLAG_MSI_X ?
-			  dev->eq_table.eq[MTHCA_EQ_CMD].msi_x_vector :
-			  dev->pdev->irq);
-		if (dev->mthca_flags & (MTHCA_FLAG_MSI | MTHCA_FLAG_MSI_X))
-			mthca_err(dev, "Try again with MSI/MSI-X disabled.\n");
-		else
+		if (dev->mthca_flags & (MTHCA_FLAG_MSI | MTHCA_FLAG_MSI_X)) {
+			mthca_warn(dev, "NOP command failed to generate interrupt "
+				   "(IRQ %d).\n",
+				   dev->mthca_flags & MTHCA_FLAG_MSI_X ?
+				   dev->eq_table.eq[MTHCA_EQ_CMD].msi_x_vector :
+				   dev->pdev->irq);
+			mthca_warn(dev, "Trying again with MSI/MSI-X disabled.\n");
+		} else {
+			mthca_err(dev, "NOP command failed to generate interrupt "
+				  "(IRQ %d), aborting.\n",
+				  dev->pdev->irq);
 			mthca_err(dev, "BIOS or ACPI interrupt routing problem?\n");
+		}
 
 		goto err_cmd_poll;
 	}
@@ -1115,24 +1103,6 @@ static int __mthca_init_one(struct pci_dev *pdev, int hca_type)
 		goto err_free_dev;
 	}
 
-	if (msi_x && !mthca_enable_msi_x(mdev))
-		mdev->mthca_flags |= MTHCA_FLAG_MSI_X;
-	else if (msi) {
-		static int warned;
-
-		if (!warned) {
-			printk(KERN_WARNING PFX "WARNING: MSI support will be "
-			       "removed from the ib_mthca driver in January 2008.\n");
-			printk(KERN_WARNING "    If you are using MSI and cannot "
-			       "switch to MSI-X, please tell "
-			       "<general@lists.openfabrics.org>.\n");
-			++warned;
-		}
-
-		if (!pci_enable_msi(pdev))
-			mdev->mthca_flags |= MTHCA_FLAG_MSI;
-	}
-
 	if (mthca_cmd_init(mdev)) {
 		mthca_err(mdev, "Failed to init command interface, aborting.\n");
 		goto err_free_dev;
@@ -1156,7 +1126,35 @@ static int __mthca_init_one(struct pci_dev *pdev, int hca_type)
 		mthca_warn(mdev, "If you have problems, try updating your HCA FW.\n");
 	}
 
+	if (msi_x && !mthca_enable_msi_x(mdev))
+		mdev->mthca_flags |= MTHCA_FLAG_MSI_X;
+	else if (msi) {
+		static int warned;
+
+		if (!warned) {
+			printk(KERN_WARNING PFX "WARNING: MSI support will be "
+			       "removed from the ib_mthca driver in January 2008.\n");
+			printk(KERN_WARNING "    If you are using MSI and cannot "
+			       "switch to MSI-X, please tell "
+			       "<general@lists.openfabrics.org>.\n");
+			++warned;
+		}
+
+		if (!pci_enable_msi(pdev))
+			mdev->mthca_flags |= MTHCA_FLAG_MSI;
+	}
+
 	err = mthca_setup_hca(mdev);
+	if (err == -EBUSY && (mdev->mthca_flags & (MTHCA_FLAG_MSI | MTHCA_FLAG_MSI_X))) {
+		if (mdev->mthca_flags & MTHCA_FLAG_MSI_X)
+			pci_disable_msix(pdev);
+		if (mdev->mthca_flags & MTHCA_FLAG_MSI)
+			pci_disable_msi(pdev);
+		mdev->mthca_flags &= ~(MTHCA_FLAG_MSI_X | MTHCA_FLAG_MSI);
+
+		err = mthca_setup_hca(mdev);
+	}
+
 	if (err)
 		goto err_close;
 
@@ -1192,17 +1190,17 @@ err_cleanup:
 	mthca_cleanup_uar_table(mdev);
 
 err_close:
+	if (mdev->mthca_flags & MTHCA_FLAG_MSI_X)
+		pci_disable_msix(pdev);
+	if (mdev->mthca_flags & MTHCA_FLAG_MSI)
+		pci_disable_msi(pdev);
+
 	mthca_close_hca(mdev);
 
 err_cmd:
 	mthca_cmd_cleanup(mdev);
 
 err_free_dev:
-	if (mdev->mthca_flags & MTHCA_FLAG_MSI_X)
-		pci_disable_msix(pdev);
-	if (mdev->mthca_flags & MTHCA_FLAG_MSI)
-		pci_disable_msi(pdev);
-
 	ib_dealloc_device(&mdev->ib_dev);
 
 err_free_res:
diff --git a/drivers/infiniband/hw/mthca/mthca_srq.c b/drivers/infiniband/hw/mthca/mthca_srq.c
index 88d219e730a..3f58c11a62b 100644
--- a/drivers/infiniband/hw/mthca/mthca_srq.c
+++ b/drivers/infiniband/hw/mthca/mthca_srq.c
@@ -509,7 +509,7 @@ int mthca_tavor_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
 	for (nreq = 0; wr; wr = wr->next) {
 		ind = srq->first_free;
 
-		if (ind < 0) {
+		if (unlikely(ind < 0)) {
 			mthca_err(dev, "SRQ %06x full\n", srq->srqn);
 			err = -ENOMEM;
 			*bad_wr = wr;
@@ -519,7 +519,7 @@ int mthca_tavor_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
 		wqe       = get_wqe(srq, ind);
 		next_ind  = *wqe_to_link(wqe);
 
-		if (next_ind < 0) {
+		if (unlikely(next_ind < 0)) {
 			mthca_err(dev, "SRQ %06x full\n", srq->srqn);
 			err = -ENOMEM;
 			*bad_wr = wr;
@@ -623,7 +623,7 @@ int mthca_arbel_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
 	for (nreq = 0; wr; ++nreq, wr = wr->next) {
 		ind = srq->first_free;
 
-		if (ind < 0) {
+		if (unlikely(ind < 0)) {
 			mthca_err(dev, "SRQ %06x full\n", srq->srqn);
 			err = -ENOMEM;
 			*bad_wr = wr;
@@ -633,7 +633,7 @@ int mthca_arbel_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
 		wqe       = get_wqe(srq, ind);
 		next_ind  = *wqe_to_link(wqe);
 
-		if (next_ind < 0) {
+		if (unlikely(next_ind < 0)) {
 			mthca_err(dev, "SRQ %06x full\n", srq->srqn);
 			err = -ENOMEM;
 			*bad_wr = wr;