diff options
Diffstat (limited to 'arch/mips')
| -rw-r--r-- | arch/mips/Kconfig | 1 | ||||
| -rw-r--r-- | arch/mips/include/asm/netlogic/xlr/msidef.h | 84 | ||||
| -rw-r--r-- | arch/mips/netlogic/xlr/irq.c | 5 | ||||
| -rw-r--r-- | arch/mips/pci/pci-xlr.c | 51 |
4 files changed, 140 insertions, 1 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index d46f1da18a3c..04ac89c6ab68 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -776,6 +776,7 @@ config NLM_XLR_BOARD select CEVT_R4K select CSRC_R4K select IRQ_CPU + select ARCH_SUPPORTS_MSI select ZONE_DMA if 64BIT select SYNC_R4K select SYS_HAS_EARLY_PRINTK diff --git a/arch/mips/include/asm/netlogic/xlr/msidef.h b/arch/mips/include/asm/netlogic/xlr/msidef.h new file mode 100644 index 000000000000..7e39d40be4f5 --- /dev/null +++ b/arch/mips/include/asm/netlogic/xlr/msidef.h @@ -0,0 +1,84 @@ +/* + * Copyright 2003-2011 NetLogic Microsystems, Inc. (NetLogic). All rights + * reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the NetLogic + * license below: + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * THIS SOFTWARE IS PROVIDED BY NETLOGIC ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL NETLOGIC OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR + * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE + * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN + * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef ASM_RMI_MSIDEF_H +#define ASM_RMI_MSIDEF_H + +/* + * Constants for Intel APIC based MSI messages. + * Adapted for the RMI XLR using identical defines + */ + +/* + * Shifts for MSI data + */ + +#define MSI_DATA_VECTOR_SHIFT 0 +#define MSI_DATA_VECTOR_MASK 0x000000ff +#define MSI_DATA_VECTOR(v) (((v) << MSI_DATA_VECTOR_SHIFT) & \ + MSI_DATA_VECTOR_MASK) + +#define MSI_DATA_DELIVERY_MODE_SHIFT 8 +#define MSI_DATA_DELIVERY_FIXED (0 << MSI_DATA_DELIVERY_MODE_SHIFT) +#define MSI_DATA_DELIVERY_LOWPRI (1 << MSI_DATA_DELIVERY_MODE_SHIFT) + +#define MSI_DATA_LEVEL_SHIFT 14 +#define MSI_DATA_LEVEL_DEASSERT (0 << MSI_DATA_LEVEL_SHIFT) +#define MSI_DATA_LEVEL_ASSERT (1 << MSI_DATA_LEVEL_SHIFT) + +#define MSI_DATA_TRIGGER_SHIFT 15 +#define MSI_DATA_TRIGGER_EDGE (0 << MSI_DATA_TRIGGER_SHIFT) +#define MSI_DATA_TRIGGER_LEVEL (1 << MSI_DATA_TRIGGER_SHIFT) + +/* + * Shift/mask fields for msi address + */ + +#define MSI_ADDR_BASE_HI 0 +#define MSI_ADDR_BASE_LO 0xfee00000 + +#define MSI_ADDR_DEST_MODE_SHIFT 2 +#define MSI_ADDR_DEST_MODE_PHYSICAL (0 << MSI_ADDR_DEST_MODE_SHIFT) +#define MSI_ADDR_DEST_MODE_LOGICAL (1 << MSI_ADDR_DEST_MODE_SHIFT) + +#define MSI_ADDR_REDIRECTION_SHIFT 3 +#define MSI_ADDR_REDIRECTION_CPU (0 << MSI_ADDR_REDIRECTION_SHIFT) +#define MSI_ADDR_REDIRECTION_LOWPRI (1 << MSI_ADDR_REDIRECTION_SHIFT) + +#define MSI_ADDR_DEST_ID_SHIFT 12 +#define MSI_ADDR_DEST_ID_MASK 0x00ffff0 +#define MSI_ADDR_DEST_ID(dest) (((dest) << MSI_ADDR_DEST_ID_SHIFT) & \ + MSI_ADDR_DEST_ID_MASK) + +#endif /* ASM_RMI_MSIDEF_H */ diff --git a/arch/mips/netlogic/xlr/irq.c b/arch/mips/netlogic/xlr/irq.c index 521bb7377eb0..fc822c8f0817 100644 --- a/arch/mips/netlogic/xlr/irq.c +++ b/arch/mips/netlogic/xlr/irq.c @@ -38,9 +38,14 @@ #include <linux/interrupt.h> #include <linux/spinlock.h> #include <linux/mm.h> +#include <linux/msi.h> +#include <linux/irq.h> +#include <linux/irqdesc.h> +#include <linux/pci.h> #include <asm/mipsregs.h> +#include <asm/netlogic/xlr/msidef.h> #include <asm/netlogic/xlr/iomap.h> #include <asm/netlogic/xlr/pic.h> #include <asm/netlogic/xlr/xlr.h> diff --git a/arch/mips/pci/pci-xlr.c b/arch/mips/pci/pci-xlr.c index 38fece16c435..87404d0034d2 100644 --- a/arch/mips/pci/pci-xlr.c +++ b/arch/mips/pci/pci-xlr.c @@ -36,12 +36,16 @@ #include <linux/pci.h> #include <linux/kernel.h> #include <linux/init.h> +#include <linux/msi.h> #include <linux/mm.h> +#include <linux/irq.h> +#include <linux/irqdesc.h> #include <linux/console.h> #include <asm/io.h> #include <asm/netlogic/interrupt.h> +#include <asm/netlogic/xlr/msidef.h> #include <asm/netlogic/xlr/iomap.h> #include <asm/netlogic/xlr/pic.h> #include <asm/netlogic/xlr/xlr.h> @@ -150,7 +154,7 @@ struct pci_controller nlm_pci_controller = { .io_offset = 0x00000000UL, }; -int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) +static int get_irq_vector(const struct pci_dev *dev) { if (!nlm_chip_is_xls()) return PIC_PCIX_IRQ; /* for XLR just one IRQ*/ @@ -182,6 +186,51 @@ int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) return 0; } +#ifdef CONFIG_PCI_MSI +void destroy_irq(unsigned int irq) +{ + /* nothing to do yet */ +} + +void arch_teardown_msi_irq(unsigned int irq) +{ + destroy_irq(irq); +} + +int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc) +{ + struct msi_msg msg; + int irq, ret; + + irq = get_irq_vector(dev); + if (irq <= 0) + return 1; + + msg.address_hi = MSI_ADDR_BASE_HI; + msg.address_lo = MSI_ADDR_BASE_LO | + MSI_ADDR_DEST_MODE_PHYSICAL | + MSI_ADDR_REDIRECTION_CPU; + + msg.data = MSI_DATA_TRIGGER_EDGE | + MSI_DATA_LEVEL_ASSERT | + MSI_DATA_DELIVERY_FIXED; + + ret = irq_set_msi_desc(irq, desc); + if (ret < 0) { + destroy_irq(irq); + return ret; + } + + write_msi_msg(irq, &msg); + return 0; +} +#endif + +int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) +{ + return get_irq_vector(dev); +} + /* Do platform specific device initialization at pci_enable_device() time */ int pcibios_plat_dev_init(struct pci_dev *dev) { |