[PATCH v2 3/5] fsl_msi: enable msi sharing through AMP OSes

[Li Yang]

Make a single PCIe MSI bank shareable through CAMP OSes. The number of
MSI used by each core can be configured by dts file.

Signed-off-by: Zhao Chenhui <b26998 at freescale.com>
Signed-off-by: Li Yang <leoli at freescale.com>
---
 arch/powerpc/sysdev/fsl_msi.c |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/arch/powerpc/sysdev/fsl_msi.c b/arch/powerpc/sysdev/fsl_msi.c
index 712f934..61e97cb 100644
--- a/arch/powerpc/sysdev/fsl_msi.c
+++ b/arch/powerpc/sysdev/fsl_msi.c
@@ -262,6 +262,8 @@ static int __devinit fsl_of_msi_probe(struct of_device *dev,
 	const u32 *p;
 	struct fsl_msi_feature *features = match->data;
 	struct fsl_msi_cascade_data *cascade_data = NULL;
+	int len;
+	u32 offset;
 
 	printk(KERN_DEBUG "Setting up Freescale MSI support\n");
 
@@ -321,6 +323,10 @@ static int __devinit fsl_of_msi_probe(struct of_device *dev,
 		err = -EINVAL;
 		goto error_out;
 	}
+	offset = 0;
+	p = of_get_property(dev->node, "msi-available-ranges", &len);
+	if (p)
+		offset = *p / IRQS_PER_MSI_REG;
 
 	count /= sizeof(u32);
 	for (i = 0; i < count / 2; i++) {
@@ -337,7 +343,7 @@ static int __devinit fsl_of_msi_probe(struct of_device *dev,
 				err = -ENOMEM;
 				goto error_out;
 			}
-			cascade_data->index = i;
+			cascade_data->index = i + offset;
 			cascade_data->msi_data = msi;
 			set_irq_data(virt_msir, (void *)cascade_data);
 			set_irq_chained_handler(virt_msir, fsl_msi_cascade);
-- 
1.6.6-rc1.GIT