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authorDavid Daney <ddaney@caviumnetworks.com>2010-07-23 10:43:49 -0700
committerRalf Baechle <ralf@linux-mips.org>2010-08-05 13:26:11 +0100
commit7d9eee6e52e817c006666b0efc5068aa219dbecb (patch)
tree8646f4a81ee17a3977b6114f31002fd7d1af0dc1 /arch/mips/pci
parenta5decf700be1123c2da6bdab5099bce072c55cc2 (diff)
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MIPS: Octeon: Make MSI use handle_simple_irq().
The use of handle_percpu_irq() is not really what we want for MSI, use handle_simple_irq() instead. This is probably the prototypical case for using handle_simple_irq(), because all the MSIs are dispatched from the root interrupt service routine. Also since the base IRQ is not shared, don't pass IRQF_SHARED. Signed-off-by: David Daney <ddaney@caviumnetworks.com> To: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/1488/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/pci')
-rw-r--r--arch/mips/pci/msi-octeon.c61
1 files changed, 15 insertions, 46 deletions
diff --git a/arch/mips/pci/msi-octeon.c b/arch/mips/pci/msi-octeon.c
index 5ce1a6a..83ceb52 100644
--- a/arch/mips/pci/msi-octeon.c
+++ b/arch/mips/pci/msi-octeon.c
@@ -228,22 +228,20 @@ static irqreturn_t octeon_msi_interrupt(int cpl, void *dev_id)
irq = fls64(msi_bits);
if (irq) {
irq += OCTEON_IRQ_MSI_BIT0 - 1;
+ if (octeon_has_feature(OCTEON_FEATURE_PCIE)) {
+ /* These chips have PCIe */
+ cvmx_write_csr(CVMX_PEXP_NPEI_MSI_RCV0,
+ 1ull << (irq - OCTEON_IRQ_MSI_BIT0));
+ } else {
+ /* These chips have PCI */
+ cvmx_write_csr(CVMX_NPI_NPI_MSI_RCV,
+ 1ull << (irq - OCTEON_IRQ_MSI_BIT0));
+ }
if (irq_desc[irq].action) {
do_IRQ(irq);
return IRQ_HANDLED;
} else {
pr_err("Spurious MSI interrupt %d\n", irq);
- if (octeon_has_feature(OCTEON_FEATURE_PCIE)) {
- /* These chips have PCIe */
- cvmx_write_csr(CVMX_PEXP_NPEI_MSI_RCV0,
- 1ull << (irq -
- OCTEON_IRQ_MSI_BIT0));
- } else {
- /* These chips have PCI */
- cvmx_write_csr(CVMX_NPI_NPI_MSI_RCV,
- 1ull << (irq -
- OCTEON_IRQ_MSI_BIT0));
- }
}
}
return IRQ_NONE;
@@ -251,27 +249,6 @@ static irqreturn_t octeon_msi_interrupt(int cpl, void *dev_id)
static DEFINE_RAW_SPINLOCK(octeon_irq_msi_lock);
-static void octeon_irq_msi_ack(unsigned int irq)
-{
- if (!octeon_has_feature(OCTEON_FEATURE_PCIE)) {
- /* These chips have PCI */
- cvmx_write_csr(CVMX_NPI_NPI_MSI_RCV,
- 1ull << (irq - OCTEON_IRQ_MSI_BIT0));
- } else {
- /*
- * These chips have PCIe. Thankfully the ACK doesn't
- * need any locking.
- */
- cvmx_write_csr(CVMX_PEXP_NPEI_MSI_RCV0,
- 1ull << (irq - OCTEON_IRQ_MSI_BIT0));
- }
-}
-
-static void octeon_irq_msi_eoi(unsigned int irq)
-{
- /* Nothing needed */
-}
-
static void octeon_irq_msi_enable(unsigned int irq)
{
if (!octeon_has_feature(OCTEON_FEATURE_PCIE)) {
@@ -326,8 +303,6 @@ static struct irq_chip octeon_irq_chip_msi = {
.name = "MSI",
.enable = octeon_irq_msi_enable,
.disable = octeon_irq_msi_disable,
- .ack = octeon_irq_msi_ack,
- .eoi = octeon_irq_msi_eoi,
};
/*
@@ -338,34 +313,28 @@ static int __init octeon_msi_initialize(void)
int irq;
for (irq = OCTEON_IRQ_MSI_BIT0; irq <= OCTEON_IRQ_MSI_LAST; irq++) {
- set_irq_chip_and_handler(irq, &octeon_irq_chip_msi,
- handle_percpu_irq);
+ set_irq_chip_and_handler(irq, &octeon_irq_chip_msi, handle_simple_irq);
}
if (octeon_has_feature(OCTEON_FEATURE_PCIE)) {
if (request_irq(OCTEON_IRQ_PCI_MSI0, octeon_msi_interrupt,
- IRQF_SHARED,
- "MSI[0:63]", octeon_msi_interrupt))
+ 0, "MSI[0:63]", octeon_msi_interrupt))
panic("request_irq(OCTEON_IRQ_PCI_MSI0) failed");
} else if (octeon_is_pci_host()) {
if (request_irq(OCTEON_IRQ_PCI_MSI0, octeon_msi_interrupt,
- IRQF_SHARED,
- "MSI[0:15]", octeon_msi_interrupt))
+ 0, "MSI[0:15]", octeon_msi_interrupt))
panic("request_irq(OCTEON_IRQ_PCI_MSI0) failed");
if (request_irq(OCTEON_IRQ_PCI_MSI1, octeon_msi_interrupt,
- IRQF_SHARED,
- "MSI[16:31]", octeon_msi_interrupt))
+ 0, "MSI[16:31]", octeon_msi_interrupt))
panic("request_irq(OCTEON_IRQ_PCI_MSI1) failed");
if (request_irq(OCTEON_IRQ_PCI_MSI2, octeon_msi_interrupt,
- IRQF_SHARED,
- "MSI[32:47]", octeon_msi_interrupt))
+ 0, "MSI[32:47]", octeon_msi_interrupt))
panic("request_irq(OCTEON_IRQ_PCI_MSI2) failed");
if (request_irq(OCTEON_IRQ_PCI_MSI3, octeon_msi_interrupt,
- IRQF_SHARED,
- "MSI[48:63]", octeon_msi_interrupt))
+ 0, "MSI[48:63]", octeon_msi_interrupt))
panic("request_irq(OCTEON_IRQ_PCI_MSI3) failed");
}