summaryrefslogtreecommitdiffstats
path: root/arch/powerpc/sysdev
diff options
context:
space:
mode:
authorLi Yang <leoli@freescale.com>2010-04-22 16:31:37 +0800
committerKumar Gala <galak@kernel.crashing.org>2010-05-24 21:26:34 -0500
commit061ca4adfb2e3c986a182fd30f7e939a1ff8d29d (patch)
tree038402d2fb9f6f0d919c1fc6d5556d252a4f629d /arch/powerpc/sysdev
parent694a7a3611a1c0e28d99b4955151c6ce68e89752 (diff)
downloadlinux-061ca4adfb2e3c986a182fd30f7e939a1ff8d29d.tar.bz2
powerpc/fsl_msi: enable msi sharing through AMP OSes
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@freescale.com> Signed-off-by: Li Yang <leoli@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/sysdev')
-rw-r--r--arch/powerpc/sysdev/fsl_msi.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/powerpc/sysdev/fsl_msi.c b/arch/powerpc/sysdev/fsl_msi.c
index efffcbd190a1..1ab703915972 100644
--- a/arch/powerpc/sysdev/fsl_msi.c
+++ b/arch/powerpc/sysdev/fsl_msi.c
@@ -261,6 +261,8 @@ 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");
@@ -320,6 +322,10 @@ 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++) {
@@ -336,7 +342,7 @@ 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);