--- /dev/null
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2006 Silicon Graphics, Inc. All Rights Reserved.
+ */
+
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/cpumask.h>
+
+#include <asm/sn/addrs.h>
+#include <asm/sn/intr.h>
+#include <asm/sn/pcibus_provider_defs.h>
+#include <asm/sn/pcidev.h>
+#include <asm/sn/nodepda.h>
+
+#include "msi.h"
+
+struct sn_msi_info {
+ u64 pci_addr;
+ struct sn_irq_info *sn_irq_info;
+};
+
+static struct sn_msi_info *sn_msi_info;
+
+static void
+sn_msi_teardown(unsigned int vector)
+{
+ nasid_t nasid;
+ int widget;
+ struct pci_dev *pdev;
+ struct pcidev_info *sn_pdev;
+ struct sn_irq_info *sn_irq_info;
+ struct pcibus_bussoft *bussoft;
+ struct sn_pcibus_provider *provider;
+
+ sn_irq_info = sn_msi_info[vector].sn_irq_info;
+ if (sn_irq_info == NULL || sn_irq_info->irq_int_bit >= 0)
+ return;
+
+ sn_pdev = (struct pcidev_info *)sn_irq_info->irq_pciioinfo;
+ pdev = sn_pdev->pdi_linux_pcidev;
+ provider = SN_PCIDEV_BUSPROVIDER(pdev);
+
+ (*provider->dma_unmap)(pdev,
+ sn_msi_info[vector].pci_addr,
+ PCI_DMA_FROMDEVICE);
+ sn_msi_info[vector].pci_addr = 0;
+
+ bussoft = SN_PCIDEV_BUSSOFT(pdev);
+ nasid = NASID_GET(bussoft->bs_base);
+ widget = (nasid & 1) ?
+ TIO_SWIN_WIDGETNUM(bussoft->bs_base) :
+ SWIN_WIDGETNUM(bussoft->bs_base);
+
+ sn_intr_free(nasid, widget, sn_irq_info);
+ sn_msi_info[vector].sn_irq_info = NULL;
+
+ return;
+}
+
+int
+sn_msi_setup(struct pci_dev *pdev, unsigned int vector,
+ u32 *addr_hi, u32 *addr_lo, u32 *data)
+{
+ int widget;
+ int status;
+ nasid_t nasid;
+ u64 bus_addr;
+ struct sn_irq_info *sn_irq_info;
+ struct pcibus_bussoft *bussoft = SN_PCIDEV_BUSSOFT(pdev);
+ struct sn_pcibus_provider *provider = SN_PCIDEV_BUSPROVIDER(pdev);
+
+ if (bussoft == NULL)
+ return -EINVAL;
+
+ if (provider == NULL || provider->dma_map_consistent == NULL)
+ return -EINVAL;
+
+ /*
+ * Set up the vector plumbing. Let the prom (via sn_intr_alloc)
+ * decide which cpu to direct this msi at by default.
+ */
+
+ nasid = NASID_GET(bussoft->bs_base);
+ widget = (nasid & 1) ?
+ TIO_SWIN_WIDGETNUM(bussoft->bs_base) :
+ SWIN_WIDGETNUM(bussoft->bs_base);
+
+ sn_irq_info = kzalloc(sizeof(struct sn_irq_info), GFP_KERNEL);
+ if (! sn_irq_info)
+ return -ENOMEM;
+
+ status = sn_intr_alloc(nasid, widget, sn_irq_info, vector, -1, -1);
+ if (status) {
+ kfree(sn_irq_info);
+ return -ENOMEM;
+ }
+
+ sn_irq_info->irq_int_bit = -1; /* mark this as an MSI irq */
+ sn_irq_fixup(pdev, sn_irq_info);
+
+ /* Prom probably should fill these in, but doesn't ... */
+ sn_irq_info->irq_bridge_type = bussoft->bs_asic_type;
+ sn_irq_info->irq_bridge = (void *)bussoft->bs_base;
+
+ /*
+ * Map the xio address into bus space
+ */
+ bus_addr = (*provider->dma_map_consistent)(pdev,
+ sn_irq_info->irq_xtalkaddr,
+ sizeof(sn_irq_info->irq_xtalkaddr),
+ SN_DMA_MSI|SN_DMA_ADDR_XIO);
+ if (! bus_addr) {
+ sn_intr_free(nasid, widget, sn_irq_info);
+ kfree(sn_irq_info);
+ return -ENOMEM;
+ }
+
+ sn_msi_info[vector].sn_irq_info = sn_irq_info;
+ sn_msi_info[vector].pci_addr = bus_addr;
+
+ *addr_hi = (u32)(bus_addr >> 32);
+ *addr_lo = (u32)(bus_addr & 0x00000000ffffffff);
+
+ /*
+ * In the SN platform, bit 16 is a "send vector" bit which
+ * must be present in order to move the vector through the system.
+ */
+ *data = 0x100 + (unsigned int)vector;
+
+#ifdef CONFIG_SMP
+ set_irq_affinity_info((vector & 0xff), sn_irq_info->irq_cpuid, 0);
+#endif
+
+ return 0;
+}
+
+static void
+sn_msi_target(unsigned int vector, unsigned int cpu,
+ u32 *addr_hi, u32 *addr_lo)
+{
+ int slice;
+ nasid_t nasid;
+ u64 bus_addr;
+ struct pci_dev *pdev;
+ struct pcidev_info *sn_pdev;
+ struct sn_irq_info *sn_irq_info;
+ struct sn_irq_info *new_irq_info;
+ struct sn_pcibus_provider *provider;
+
+ sn_irq_info = sn_msi_info[vector].sn_irq_info;
+ if (sn_irq_info == NULL || sn_irq_info->irq_int_bit >= 0)
+ return;
+
+ /*
+ * Release XIO resources for the old MSI PCI address
+ */
+
+ sn_pdev = (struct pcidev_info *)sn_irq_info->irq_pciioinfo;
+ pdev = sn_pdev->pdi_linux_pcidev;
+ provider = SN_PCIDEV_BUSPROVIDER(pdev);
+
+ bus_addr = (u64)(*addr_hi) << 32 | (u64)(*addr_lo);
+ (*provider->dma_unmap)(pdev, bus_addr, PCI_DMA_FROMDEVICE);
+ sn_msi_info[vector].pci_addr = 0;
+
+ nasid = cpuid_to_nasid(cpu);
+ slice = cpuid_to_slice(cpu);
+
+ new_irq_info = sn_retarget_vector(sn_irq_info, nasid, slice);
+ sn_msi_info[vector].sn_irq_info = new_irq_info;
+ if (new_irq_info == NULL)
+ return;
+
+ /*
+ * Map the xio address into bus space
+ */
+
+ bus_addr = (*provider->dma_map_consistent)(pdev,
+ new_irq_info->irq_xtalkaddr,
+ sizeof(new_irq_info->irq_xtalkaddr),
+ SN_DMA_MSI|SN_DMA_ADDR_XIO);
+
+ sn_msi_info[vector].pci_addr = bus_addr;
+ *addr_hi = (u32)(bus_addr >> 32);
+ *addr_lo = (u32)(bus_addr & 0x00000000ffffffff);
+}
+
+struct msi_ops sn_msi_ops = {
+ .setup = sn_msi_setup,
+ .teardown = sn_msi_teardown,
+#ifdef CONFIG_SMP
+ .target = sn_msi_target,
+#endif
+};
+
+int
+sn_msi_init(void)
+{
+ sn_msi_info =
+ kzalloc(sizeof(struct sn_msi_info) * NR_VECTORS, GFP_KERNEL);
+ if (! sn_msi_info)
+ return -ENOMEM;
+
+ msi_register(&sn_msi_ops);
+ return 0;
+}
git://git.onelab.eu / linux-2.6.git / blobdiff