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Commit 061ca4ad authored by Li Yang's avatar Li Yang Committed by Kumar Gala
Browse files

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: default avatarZhao Chenhui <b26998@freescale.com>
Signed-off-by: default avatarLi Yang <leoli@freescale.com>
Signed-off-by: default avatarKumar Gala <galak@kernel.crashing.org>
parent 694a7a36

arch/powerpc/sysdev/fsl_msi.c

+7 −1
Original line number Diff line number Diff line
@@ -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);