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author | Michael Ellerman <michael@ellerman.id.au> | 2011-08-08 12:30:55 (GMT) |
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committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2011-09-19 23:19:55 (GMT) |
commit | f9a71e0fd1b44148d7af6ce2fecfb2cf7a4df636 (patch) | |
tree | 1154460114422872f7a02ad086726e7b23740135 /arch/powerpc/platforms/wsp/ics.c | |
parent | f352c7251255effe6c2326190f1378adbd142aa3 (diff) | |
download | linux-fsl-qoriq-f9a71e0fd1b44148d7af6ce2fecfb2cf7a4df636.tar.xz |
powerpc/wsp: Add MSI support for PCI on PowerEN
Based on a patch by Michael Ellerman <michael@ellerman.id.au>
Patch was simply forward ported upstream.
Jimi Xenidis <jimix@pobox.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/platforms/wsp/ics.c')
-rw-r--r-- | arch/powerpc/platforms/wsp/ics.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/wsp/ics.c b/arch/powerpc/platforms/wsp/ics.c index e53bd9e..5768743 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 */ |