diff options
Diffstat (limited to 'arch/powerpc/sysdev/mpic_pasemi_msi.c')
| -rw-r--r-- | arch/powerpc/sysdev/mpic_pasemi_msi.c | 167 |
1 files changed, 0 insertions, 167 deletions
diff --git a/arch/powerpc/sysdev/mpic_pasemi_msi.c b/arch/powerpc/sysdev/mpic_pasemi_msi.c deleted file mode 100644 index a3f660eed..000000000 --- a/arch/powerpc/sysdev/mpic_pasemi_msi.c +++ /dev/null @@ -1,167 +0,0 @@ -/* - * Copyright 2007, Olof Johansson, PA Semi - * - * Based on arch/powerpc/sysdev/mpic_u3msi.c: - * - * Copyright 2006, Segher Boessenkool, IBM Corporation. - * Copyright 2006-2007, Michael Ellerman, IBM Corporation. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; version 2 of the - * License. - * - */ - -#undef DEBUG - -#include <linux/irq.h> -#include <linux/msi.h> -#include <asm/mpic.h> -#include <asm/prom.h> -#include <asm/hw_irq.h> -#include <asm/ppc-pci.h> -#include <asm/msi_bitmap.h> - -#include "mpic.h" - -/* Allocate 16 interrupts per device, to give an alignment of 16, - * since that's the size of the grouping w.r.t. affinity. If someone - * needs more than 32 MSI's down the road we'll have to rethink this, - * but it should be OK for now. - */ -#define ALLOC_CHUNK 16 - -#define PASEMI_MSI_ADDR 0xfc080000 - -/* A bit ugly, can we get this from the pci_dev somehow? */ -static struct mpic *msi_mpic; - - -static void mpic_pasemi_msi_mask_irq(struct irq_data *data) -{ - pr_debug("mpic_pasemi_msi_mask_irq %d\n", data->irq); - pci_msi_mask_irq(data); - mpic_mask_irq(data); -} - -static void mpic_pasemi_msi_unmask_irq(struct irq_data *data) -{ - pr_debug("mpic_pasemi_msi_unmask_irq %d\n", data->irq); - mpic_unmask_irq(data); - pci_msi_unmask_irq(data); -} - -static struct irq_chip mpic_pasemi_msi_chip = { - .irq_shutdown = mpic_pasemi_msi_mask_irq, - .irq_mask = mpic_pasemi_msi_mask_irq, - .irq_unmask = mpic_pasemi_msi_unmask_irq, - .irq_eoi = mpic_end_irq, - .irq_set_type = mpic_set_irq_type, - .irq_set_affinity = mpic_set_affinity, - .name = "PASEMI-MSI", -}; - -static void pasemi_msi_teardown_msi_irqs(struct pci_dev *pdev) -{ - struct msi_desc *entry; - - pr_debug("pasemi_msi_teardown_msi_irqs, pdev %p\n", pdev); - - list_for_each_entry(entry, &pdev->msi_list, list) { - if (entry->irq == NO_IRQ) - continue; - - irq_set_msi_desc(entry->irq, NULL); - msi_bitmap_free_hwirqs(&msi_mpic->msi_bitmap, - virq_to_hw(entry->irq), ALLOC_CHUNK); - irq_dispose_mapping(entry->irq); - } - - return; -} - -static int pasemi_msi_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type) -{ - unsigned int virq; - struct msi_desc *entry; - struct msi_msg msg; - int hwirq; - - if (type == PCI_CAP_ID_MSIX) - pr_debug("pasemi_msi: MSI-X untested, trying anyway\n"); - pr_debug("pasemi_msi_setup_msi_irqs, pdev %p nvec %d type %d\n", - pdev, nvec, type); - - msg.address_hi = 0; - msg.address_lo = PASEMI_MSI_ADDR; - - list_for_each_entry(entry, &pdev->msi_list, list) { - /* Allocate 16 interrupts for now, since that's the grouping for - * affinity. This can be changed later if it turns out 32 is too - * few MSIs for someone, but restrictions will apply to how the - * sources can be changed independently. - */ - hwirq = msi_bitmap_alloc_hwirqs(&msi_mpic->msi_bitmap, - ALLOC_CHUNK); - if (hwirq < 0) { - pr_debug("pasemi_msi: failed allocating hwirq\n"); - return hwirq; - } - - virq = irq_create_mapping(msi_mpic->irqhost, hwirq); - if (virq == NO_IRQ) { - pr_debug("pasemi_msi: failed mapping hwirq 0x%x\n", - hwirq); - msi_bitmap_free_hwirqs(&msi_mpic->msi_bitmap, hwirq, - ALLOC_CHUNK); - return -ENOSPC; - } - - /* Vector on MSI is really an offset, the hardware adds - * it to the value written at the magic address. So set - * it to 0 to remain sane. - */ - mpic_set_vector(virq, 0); - - irq_set_msi_desc(virq, entry); - irq_set_chip(virq, &mpic_pasemi_msi_chip); - irq_set_irq_type(virq, IRQ_TYPE_EDGE_RISING); - - pr_debug("pasemi_msi: allocated virq 0x%x (hw 0x%x) " \ - "addr 0x%x\n", virq, hwirq, msg.address_lo); - - /* Likewise, the device writes [0...511] into the target - * register to generate MSI [512...1023] - */ - msg.data = hwirq-0x200; - pci_write_msi_msg(virq, &msg); - } - - return 0; -} - -int mpic_pasemi_msi_init(struct mpic *mpic) -{ - int rc; - - if (!mpic->irqhost->of_node || - !of_device_is_compatible(mpic->irqhost->of_node, - "pasemi,pwrficient-openpic")) - return -ENODEV; - - rc = mpic_msi_init_allocator(mpic); - if (rc) { - pr_debug("pasemi_msi: Error allocating bitmap!\n"); - return rc; - } - - pr_debug("pasemi_msi: Registering PA Semi MPIC MSI callbacks\n"); - - msi_mpic = mpic; - WARN_ON(ppc_md.setup_msi_irqs); - ppc_md.setup_msi_irqs = pasemi_msi_setup_msi_irqs; - ppc_md.teardown_msi_irqs = pasemi_msi_teardown_msi_irqs; - - return 0; -} |