linux-kernel - [PATCH RFCv1 4/7] PCI/MSI: Allow __pci_enable_msi

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Message-ID: <7406707cbcf225fe8f6ec3ce497bdcfc51f27afb.1731130093.git.nicolinc@nvidia.com>
Date: Fri, 8 Nov 2024 21:48:49 -0800
From: Nicolin Chen <nicolinc@...dia.com>
To: <maz@...nel.org>, <tglx@...utronix.de>, <bhelgaas@...gle.com>,
	<alex.williamson@...hat.com>
CC: <jgg@...dia.com>, <leonro@...dia.com>,
	<shameerali.kolothum.thodi@...wei.com>, <robin.murphy@....com>,
	<dlemoal@...nel.org>, <kevin.tian@...el.com>, <smostafa@...gle.com>,
	<andriy.shevchenko@...ux.intel.com>, <reinette.chatre@...el.com>,
	<eric.auger@...hat.com>, <ddutile@...hat.com>, <yebin10@...wei.com>,
	<brauner@...nel.org>, <apatel@...tanamicro.com>,
	<shivamurthy.shastri@...utronix.de>, <anna-maria@...utronix.de>,
	<nipun.gupta@....com>, <marek.vasut+renesas@...lbox.org>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
	<linux-pci@...r.kernel.org>, <kvm@...r.kernel.org>
Subject: [PATCH RFCv1 4/7] PCI/MSI: Allow __pci_enable_msi_range to pass in iova

The previous patch passes in the msi_iova to msi_capability_init, so this
allows its caller to do the same.

Signed-off-by: Nicolin Chen <nicolinc@...dia.com>
---
 drivers/pci/msi/msi.h | 3 ++-
 drivers/pci/msi/api.c | 6 ++++--
 drivers/pci/msi/msi.c | 4 ++--
 3 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/drivers/pci/msi/msi.h b/drivers/pci/msi/msi.h
index ee53cf079f4e..8009d69bf9a5 100644
--- a/drivers/pci/msi/msi.h
+++ b/drivers/pci/msi/msi.h
@@ -93,7 +93,8 @@ extern int pci_msi_enable;
 void pci_msi_shutdown(struct pci_dev *dev);
 void pci_msix_shutdown(struct pci_dev *dev);
 void pci_free_msi_irqs(struct pci_dev *dev);
-int __pci_enable_msi_range(struct pci_dev *dev, int minvec, int maxvec, struct irq_affinity *affd);
+int __pci_enable_msi_range(struct pci_dev *dev, int minvec, int maxvec,
+			   struct irq_affinity *affd, dma_addr_t iova);
 int __pci_enable_msix_range(struct pci_dev *dev, struct msix_entry *entries, int minvec,
 			    int maxvec,  struct irq_affinity *affd, int flags);
 void __pci_restore_msi_state(struct pci_dev *dev);
diff --git a/drivers/pci/msi/api.c b/drivers/pci/msi/api.c
index b956ce591f96..99ade7f69cd4 100644
--- a/drivers/pci/msi/api.c
+++ b/drivers/pci/msi/api.c
@@ -29,7 +29,8 @@
  */
 int pci_enable_msi(struct pci_dev *dev)
 {
-	int rc = __pci_enable_msi_range(dev, 1, 1, NULL);
+	int rc = __pci_enable_msi_range(dev, 1, 1, NULL,
+					PHYS_ADDR_MAX);
 	if (rc < 0)
 		return rc;
 	return 0;
@@ -274,7 +275,8 @@ int pci_alloc_irq_vectors_affinity(struct pci_dev *dev, unsigned int min_vecs,
 	}
 
 	if (flags & PCI_IRQ_MSI) {
-		nvecs = __pci_enable_msi_range(dev, min_vecs, max_vecs, affd);
+		nvecs = __pci_enable_msi_range(dev, min_vecs, max_vecs,
+					       affd, PHYS_ADDR_MAX);
 		if (nvecs > 0)
 			return nvecs;
 	}
diff --git a/drivers/pci/msi/msi.c b/drivers/pci/msi/msi.c
index 95caa81d3421..25da0435c674 100644
--- a/drivers/pci/msi/msi.c
+++ b/drivers/pci/msi/msi.c
@@ -417,7 +417,7 @@ static int msi_capability_init(struct pci_dev *dev, int nvec,
 }
 
 int __pci_enable_msi_range(struct pci_dev *dev, int minvec, int maxvec,
-			   struct irq_affinity *affd)
+			   struct irq_affinity *affd, dma_addr_t iova)
 {
 	int nvec;
 	int rc;
@@ -460,7 +460,7 @@ int __pci_enable_msi_range(struct pci_dev *dev, int minvec, int maxvec,
 				return -ENOSPC;
 		}
 
-		rc = msi_capability_init(dev, nvec, affd, PHYS_ADDR_MAX);
+		rc = msi_capability_init(dev, nvec, affd, iova);
 		if (rc == 0)
 			return nvec;
 
-- 
2.43.0