From: Bharat Bhushan <r65777@freescale.com>
To: <alex.williamson@redhat.com>, <joro@8bytes.org>,
<galak@kernel.crashing.org>, <scottwood@freescale.com>,
<linux-kernel@vger.kernel.org>, <linuxppc-dev@lists.ozlabs.org>,
<linux-pci@vger.kernel.org>, <agraf@suse.de>,
<stuart.yoder@freescale.com>
Cc: Bharat Bhushan <bharat.bhushan@freescale.com>
Subject: [PATCH 2/5 RFC] powerpc: pci: Add arch specific msi region interface
Date: Tue, 29 Oct 2013 16:57:40 +0530 [thread overview]
Message-ID: <1383046062-16520-4-git-send-email-Bharat.Bhushan@freescale.com> (raw)
In-Reply-To: <1383046062-16520-1-git-send-email-Bharat.Bhushan@freescale.com>
This patch adds the interface to get the msi region information from arch
specific code. The machine spicific code is not yet defined.
Signed-off-by: Bharat Bhushan <bharat.bhushan@freescale.com>
---
arch/powerpc/include/asm/machdep.h | 8 ++++++++
arch/powerpc/kernel/msi.c | 18 ++++++++++++++++++
2 files changed, 26 insertions(+), 0 deletions(-)
diff --git a/arch/powerpc/include/asm/machdep.h b/arch/powerpc/include/asm/machdep.h
index 8b48090..8d1b787 100644
--- a/arch/powerpc/include/asm/machdep.h
+++ b/arch/powerpc/include/asm/machdep.h
@@ -30,6 +30,7 @@ struct file;
struct pci_controller;
struct kimage;
struct pci_host_bridge;
+struct msi_region;
struct machdep_calls {
char *name;
@@ -124,6 +125,13 @@ struct machdep_calls {
int (*setup_msi_irqs)(struct pci_dev *dev,
int nvec, int type);
void (*teardown_msi_irqs)(struct pci_dev *dev);
+
+ /* Returns the number of MSI regions (banks) */
+ int (*msi_get_region_count)(void);
+
+ /* Returns the requested region's address and size */
+ int (*msi_get_region)(int region_num,
+ struct msi_region *region);
#endif
void (*restart)(char *cmd);
diff --git a/arch/powerpc/kernel/msi.c b/arch/powerpc/kernel/msi.c
index 8bbc12d..1a67787 100644
--- a/arch/powerpc/kernel/msi.c
+++ b/arch/powerpc/kernel/msi.c
@@ -13,6 +13,24 @@
#include <asm/machdep.h>
+int arch_msi_get_region_count(void)
+{
+ if (ppc_md.msi_get_region_count) {
+ pr_debug("msi: Using platform get_region_count routine.\n");
+ return ppc_md.msi_get_region_count();
+ }
+ return 0;
+}
+
+int arch_msi_get_region(int region_num, struct msi_region *region)
+{
+ if (ppc_md.msi_get_region) {
+ pr_debug("msi: Using platform get_region routine.\n");
+ return ppc_md.msi_get_region(region_num, region);
+ }
+ return 0;
+}
+
int arch_msi_check_device(struct pci_dev* dev, int nvec, int type)
{
if (!ppc_md.setup_msi_irqs || !ppc_md.teardown_msi_irqs) {
--
1.7.0.4
next prev parent reply other threads:[~2013-10-29 11:34 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-29 11:27 [PATCH 1/5 RFC] pci:msi: add weak function for returning msi region info Bharat Bhushan
2013-10-29 11:27 ` [PATCH 4/5 RFC] pci: msi: expose msi region information functions Bharat Bhushan
2013-10-29 11:27 ` [PATCH 3/5 RFC] powerpc: msi: Extend the msi region interface to get info from fsl_msi Bharat Bhushan
2013-10-29 11:27 ` Bharat Bhushan [this message]
2013-10-29 11:27 ` [PATCH 5/5 RFC] vfio: setup iova-base for msi interrupts for vfio assigned device Bharat Bhushan
2013-10-29 11:27 ` [PATCH 0/5 RFC] vfio/pci: add interface to for MSI support with FSL PAMU Bharat Bhushan
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