From f9a71e0fd1b44148d7af6ce2fecfb2cf7a4df636 Mon Sep 17 00:00:00 2001 From: Michael Ellerman Date: Mon, 8 Aug 2011 12:30:55 +0000 Subject: powerpc/wsp: Add MSI support for PCI on PowerEN Based on a patch by Michael Ellerman Patch was simply forward ported upstream. Jimi Xenidis Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/platforms/wsp/ics.c | 48 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) (limited to 'arch/powerpc/platforms/wsp/ics.c') diff --git a/arch/powerpc/platforms/wsp/ics.c b/arch/powerpc/platforms/wsp/ics.c index e53bd9e7b125..576874392543 100644 --- a/arch/powerpc/platforms/wsp/ics.c +++ b/arch/powerpc/platforms/wsp/ics.c @@ -710,3 +710,51 @@ void __init wsp_init_irq(void) /* We need to patch our irq chip's EOI to point to the right ICP */ wsp_irq_chip.irq_eoi = icp_ops->eoi; } + +#ifdef CONFIG_PCI_MSI +static void wsp_ics_msi_unmask_irq(struct irq_data *d) +{ + wsp_chip_unmask_irq(d); + unmask_msi_irq(d); +} + +static unsigned int wsp_ics_msi_startup(struct irq_data *d) +{ + wsp_ics_msi_unmask_irq(d); + return 0; +} + +static void wsp_ics_msi_mask_irq(struct irq_data *d) +{ + mask_msi_irq(d); + wsp_chip_mask_irq(d); +} + +/* + * we do it this way because we reassinge default EOI handling in + * irq_init() above + */ +static void wsp_ics_eoi(struct irq_data *data) +{ + wsp_irq_chip.irq_eoi(data); +} + +static struct irq_chip wsp_ics_msi = { + .name = "WSP ICS MSI", + .irq_startup = wsp_ics_msi_startup, + .irq_mask = wsp_ics_msi_mask_irq, + .irq_unmask = wsp_ics_msi_unmask_irq, + .irq_eoi = wsp_ics_eoi, + .irq_set_affinity = wsp_chip_set_affinity +}; + +void wsp_ics_set_msi_chip(unsigned int irq) +{ + irq_set_chip(irq, &wsp_ics_msi); +} + +void wsp_ics_set_std_chip(unsigned int irq) +{ + irq_set_chip(irq, &wsp_irq_chip); +} +#endif /* CONFIG_PCI_MSI */ -- cgit v1.2.3-59-g8ed1b