diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/mips/cavium-octeon/octeon-irq.c | 93 | ||||
| -rw-r--r-- | arch/mips/pci/msi-octeon.c | 90 |
2 files changed, 88 insertions, 95 deletions
diff --git a/arch/mips/cavium-octeon/octeon-irq.c b/arch/mips/cavium-octeon/octeon-irq.c index c424cd158dc6..f4b901aaf509 100644 --- a/arch/mips/cavium-octeon/octeon-irq.c +++ b/arch/mips/cavium-octeon/octeon-irq.c @@ -10,8 +10,6 @@ #include <linux/smp.h> #include <asm/octeon/octeon.h> -#include <asm/octeon/cvmx-pexp-defs.h> -#include <asm/octeon/cvmx-npi-defs.h> static DEFINE_RAW_SPINLOCK(octeon_irq_ciu0_lock); static DEFINE_RAW_SPINLOCK(octeon_irq_ciu1_lock); @@ -528,90 +526,6 @@ static struct irq_chip octeon_irq_chip_ciu1 = { #endif }; -#ifdef CONFIG_PCI_MSI - -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)) { - /* - * Octeon PCI doesn't have the ability to mask/unmask - * MSI interrupts individually. Instead of - * masking/unmasking them in groups of 16, we simple - * assume MSI devices are well behaved. MSI - * interrupts are always enable and the ACK is assumed - * to be enough. - */ - } else { - /* These chips have PCIe. Note that we only support - * the first 64 MSI interrupts. Unfortunately all the - * MSI enables are in the same register. We use - * MSI0's lock to control access to them all. - */ - uint64_t en; - unsigned long flags; - raw_spin_lock_irqsave(&octeon_irq_msi_lock, flags); - en = cvmx_read_csr(CVMX_PEXP_NPEI_MSI_ENB0); - en |= 1ull << (irq - OCTEON_IRQ_MSI_BIT0); - cvmx_write_csr(CVMX_PEXP_NPEI_MSI_ENB0, en); - cvmx_read_csr(CVMX_PEXP_NPEI_MSI_ENB0); - raw_spin_unlock_irqrestore(&octeon_irq_msi_lock, flags); - } -} - -static void octeon_irq_msi_disable(unsigned int irq) -{ - if (!octeon_has_feature(OCTEON_FEATURE_PCIE)) { - /* See comment in enable */ - } else { - /* - * These chips have PCIe. Note that we only support - * the first 64 MSI interrupts. Unfortunately all the - * MSI enables are in the same register. We use - * MSI0's lock to control access to them all. - */ - uint64_t en; - unsigned long flags; - raw_spin_lock_irqsave(&octeon_irq_msi_lock, flags); - en = cvmx_read_csr(CVMX_PEXP_NPEI_MSI_ENB0); - en &= ~(1ull << (irq - OCTEON_IRQ_MSI_BIT0)); - cvmx_write_csr(CVMX_PEXP_NPEI_MSI_ENB0, en); - cvmx_read_csr(CVMX_PEXP_NPEI_MSI_ENB0); - raw_spin_unlock_irqrestore(&octeon_irq_msi_lock, flags); - } -} - -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, -}; -#endif - void __init arch_init_irq(void) { int irq; @@ -672,13 +586,6 @@ void __init arch_init_irq(void) set_irq_chip_and_handler(irq, chip1, handle_percpu_irq); } -#ifdef CONFIG_PCI_MSI - /* 152 - 215 PCI/PCIe MSI interrupts */ - for (irq = OCTEON_IRQ_MSI_BIT0; irq <= OCTEON_IRQ_MSI_BIT63; irq++) { - set_irq_chip_and_handler(irq, &octeon_irq_chip_msi, - handle_percpu_irq); - } -#endif set_c0_status(0x300 << 2); } diff --git a/arch/mips/pci/msi-octeon.c b/arch/mips/pci/msi-octeon.c index 03742e647657..1e31526f0e53 100644 --- a/arch/mips/pci/msi-octeon.c +++ b/arch/mips/pci/msi-octeon.c @@ -249,12 +249,99 @@ static irqreturn_t octeon_msi_interrupt(int cpl, void *dev_id) return IRQ_NONE; } +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)) { + /* + * Octeon PCI doesn't have the ability to mask/unmask + * MSI interrupts individually. Instead of + * masking/unmasking them in groups of 16, we simple + * assume MSI devices are well behaved. MSI + * interrupts are always enable and the ACK is assumed + * to be enough. + */ + } else { + /* These chips have PCIe. Note that we only support + * the first 64 MSI interrupts. Unfortunately all the + * MSI enables are in the same register. We use + * MSI0's lock to control access to them all. + */ + uint64_t en; + unsigned long flags; + raw_spin_lock_irqsave(&octeon_irq_msi_lock, flags); + en = cvmx_read_csr(CVMX_PEXP_NPEI_MSI_ENB0); + en |= 1ull << (irq - OCTEON_IRQ_MSI_BIT0); + cvmx_write_csr(CVMX_PEXP_NPEI_MSI_ENB0, en); + cvmx_read_csr(CVMX_PEXP_NPEI_MSI_ENB0); + raw_spin_unlock_irqrestore(&octeon_irq_msi_lock, flags); + } +} + +static void octeon_irq_msi_disable(unsigned int irq) +{ + if (!octeon_has_feature(OCTEON_FEATURE_PCIE)) { + /* See comment in enable */ + } else { + /* + * These chips have PCIe. Note that we only support + * the first 64 MSI interrupts. Unfortunately all the + * MSI enables are in the same register. We use + * MSI0's lock to control access to them all. + */ + uint64_t en; + unsigned long flags; + raw_spin_lock_irqsave(&octeon_irq_msi_lock, flags); + en = cvmx_read_csr(CVMX_PEXP_NPEI_MSI_ENB0); + en &= ~(1ull << (irq - OCTEON_IRQ_MSI_BIT0)); + cvmx_write_csr(CVMX_PEXP_NPEI_MSI_ENB0, en); + cvmx_read_csr(CVMX_PEXP_NPEI_MSI_ENB0); + raw_spin_unlock_irqrestore(&octeon_irq_msi_lock, flags); + } +} + +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, +}; /* * Initializes the MSI interrupt handling code */ -int octeon_msi_initialize(void) +static int __init octeon_msi_initialize(void) { + int irq; + + for (irq = OCTEON_IRQ_MSI_BIT0; irq <= OCTEON_IRQ_MSI_BIT63; irq++) { + set_irq_chip_and_handler(irq, &octeon_irq_chip_msi, + handle_percpu_irq); + } + if (octeon_has_feature(OCTEON_FEATURE_PCIE)) { if (request_irq(OCTEON_IRQ_PCI_MSI0, octeon_msi_interrupt, IRQF_SHARED, @@ -284,5 +371,4 @@ int octeon_msi_initialize(void) } return 0; } - subsys_initcall(octeon_msi_initialize); |