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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>
This commit is contained in:
Li Yang 2010-04-22 16:31:37 +08:00 committed by Kumar Gala
parent 694a7a3611
commit 061ca4adfb
1 changed files with 7 additions and 1 deletions
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8
arch/powerpc/sysdev/fsl_msi.c
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@ -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);