1 files changed, 265 insertions, 0 deletions
diff --git a/arch/ia64/sn/pci/pcibr/pcibr_provider.c b/arch/ia64/sn/pci/pcibr/pcibr_provider.c
new file mode 100644
index 000000000..7195df1da
--- /dev/null
+++ b/arch/ia64/sn/pci/pcibr/pcibr_provider.c
@@ -0,0 +1,265 @@
+/*
+ * 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) 2001-2004, 2006 Silicon Graphics, Inc. All rights reserved.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/pci.h>
+#include <linux/export.h>
+#include <asm/sn/addrs.h>
+#include <asm/sn/geo.h>
+#include <asm/sn/pcibr_provider.h>
+#include <asm/sn/pcibus_provider_defs.h>
+#include <asm/sn/pcidev.h>
+#include <asm/sn/sn_sal.h>
+#include <asm/sn/pic.h>
+#include <asm/sn/sn2/sn_hwperf.h>
+#include "xtalk/xwidgetdev.h"
+#include "xtalk/hubdev.h"
+
+int
+sal_pcibr_slot_enable(struct pcibus_info *soft, int device, void *resp,
+                      char **ssdt)
+{
+	struct ia64_sal_retval ret_stuff;
+	u64 busnum;
+	u64 segment;
+
+	ret_stuff.status = 0;
+	ret_stuff.v0 = 0;
+
+	segment = soft->pbi_buscommon.bs_persist_segment;
+	busnum = soft->pbi_buscommon.bs_persist_busnum;
+	SAL_CALL_NOLOCK(ret_stuff, (u64) SN_SAL_IOIF_SLOT_ENABLE, segment,
+			busnum, (u64) device, (u64) resp, (u64)ia64_tpa(ssdt),
+			0, 0);
+
+	return (int)ret_stuff.v0;
+}
+
+int
+sal_pcibr_slot_disable(struct pcibus_info *soft, int device, int action,
+		       void *resp)
+{
+	struct ia64_sal_retval ret_stuff;
+	u64 busnum;
+	u64 segment;
+
+	ret_stuff.status = 0;
+	ret_stuff.v0 = 0;
+
+	segment = soft->pbi_buscommon.bs_persist_segment;
+	busnum = soft->pbi_buscommon.bs_persist_busnum;
+	SAL_CALL_NOLOCK(ret_stuff, (u64) SN_SAL_IOIF_SLOT_DISABLE,
+			segment, busnum, (u64) device, (u64) action,
+			(u64) resp, 0, 0);
+
+	return (int)ret_stuff.v0;
+}
+
+static int sal_pcibr_error_interrupt(struct pcibus_info *soft)
+{
+	struct ia64_sal_retval ret_stuff;
+	u64 busnum;
+	int segment;
+	ret_stuff.status = 0;
+	ret_stuff.v0 = 0;
+
+	segment = soft->pbi_buscommon.bs_persist_segment;
+	busnum = soft->pbi_buscommon.bs_persist_busnum;
+	SAL_CALL_NOLOCK(ret_stuff,
+			(u64) SN_SAL_IOIF_ERROR_INTERRUPT,
+			(u64) segment, (u64) busnum, 0, 0, 0, 0, 0);
+
+	return (int)ret_stuff.v0;
+}
+
+u16 sn_ioboard_to_pci_bus(struct pci_bus *pci_bus)
+{
+	long rc;
+	u16 uninitialized_var(ioboard);		/* GCC be quiet */
+	nasid_t nasid = NASID_GET(SN_PCIBUS_BUSSOFT(pci_bus)->bs_base);
+
+	rc = ia64_sn_sysctl_ioboard_get(nasid, &ioboard);
+	if (rc) {
+		printk(KERN_WARNING "ia64_sn_sysctl_ioboard_get failed: %ld\n",
+		       rc);
+		return 0;
+	}
+
+	return ioboard;
+}
+
+/* 
+ * PCI Bridge Error interrupt handler.  Gets invoked whenever a PCI 
+ * bridge sends an error interrupt.
+ */
+static irqreturn_t
+pcibr_error_intr_handler(int irq, void *arg)
+{
+	struct pcibus_info *soft = arg;
+
+	if (sal_pcibr_error_interrupt(soft) < 0)
+		panic("pcibr_error_intr_handler(): Fatal Bridge Error");
+
+	return IRQ_HANDLED;
+}
+
+void *
+pcibr_bus_fixup(struct pcibus_bussoft *prom_bussoft, struct pci_controller *controller)
+{
+	int nasid, cnode, j;
+	struct hubdev_info *hubdev_info;
+	struct pcibus_info *soft;
+	struct sn_flush_device_kernel *sn_flush_device_kernel;
+	struct sn_flush_device_common *common;
+
+	if (! IS_PCI_BRIDGE_ASIC(prom_bussoft->bs_asic_type)) {
+		return NULL;
+	}
+
+	/*
+	 * Allocate kernel bus soft and copy from prom.
+	 */
+
+	soft = kmemdup(prom_bussoft, sizeof(struct pcibus_info), GFP_KERNEL);
+	if (!soft) {
+		return NULL;
+	}
+
+	soft->pbi_buscommon.bs_base = (unsigned long)
+		ioremap(REGION_OFFSET(soft->pbi_buscommon.bs_base),
+			sizeof(struct pic));
+
+	spin_lock_init(&soft->pbi_lock);
+
+	/*
+	 * register the bridge's error interrupt handler
+	 */
+	if (request_irq(SGI_PCIASIC_ERROR, pcibr_error_intr_handler,
+			IRQF_SHARED, "PCIBR error", (void *)(soft))) {
+		printk(KERN_WARNING
+		       "pcibr cannot allocate interrupt for error handler\n");
+	}
+	irq_set_handler(SGI_PCIASIC_ERROR, handle_level_irq);
+	sn_set_err_irq_affinity(SGI_PCIASIC_ERROR);
+
+	/* 
+	 * Update the Bridge with the "kernel" pagesize 
+	 */
+	if (PAGE_SIZE < 16384) {
+		pcireg_control_bit_clr(soft, PCIBR_CTRL_PAGE_SIZE);
+	} else {
+		pcireg_control_bit_set(soft, PCIBR_CTRL_PAGE_SIZE);
+	}
+
+	nasid = NASID_GET(soft->pbi_buscommon.bs_base);
+	cnode = nasid_to_cnodeid(nasid);
+	hubdev_info = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
+
+	if (hubdev_info->hdi_flush_nasid_list.widget_p) {
+		sn_flush_device_kernel = hubdev_info->hdi_flush_nasid_list.
+		    widget_p[(int)soft->pbi_buscommon.bs_xid];
+		if (sn_flush_device_kernel) {
+			for (j = 0; j < DEV_PER_WIDGET;
+			     j++, sn_flush_device_kernel++) {
+				common = sn_flush_device_kernel->common;
+				if (common->sfdl_slot == -1)
+					continue;
+				if ((common->sfdl_persistent_segment ==
+				     soft->pbi_buscommon.bs_persist_segment) &&
+				     (common->sfdl_persistent_busnum ==
+				     soft->pbi_buscommon.bs_persist_busnum))
+					common->sfdl_pcibus_info =
+					    soft;
+			}
+		}
+	}
+
+	/* Setup the PMU ATE map */
+	soft->pbi_int_ate_resource.lowest_free_index = 0;
+	soft->pbi_int_ate_resource.ate =
+	    kcalloc(soft->pbi_int_ate_size, sizeof(u64), GFP_KERNEL);
+
+	if (!soft->pbi_int_ate_resource.ate) {
+		kfree(soft);
+		return NULL;
+	}
+
+	return soft;
+}
+
+void pcibr_force_interrupt(struct sn_irq_info *sn_irq_info)
+{
+	struct pcidev_info *pcidev_info;
+	struct pcibus_info *pcibus_info;
+	int bit = sn_irq_info->irq_int_bit;
+
+	if (! sn_irq_info->irq_bridge)
+		return;
+
+	pcidev_info = (struct pcidev_info *)sn_irq_info->irq_pciioinfo;
+	if (pcidev_info) {
+		pcibus_info =
+		    (struct pcibus_info *)pcidev_info->pdi_host_pcidev_info->
+		    pdi_pcibus_info;
+		pcireg_force_intr_set(pcibus_info, bit);
+	}
+}
+
+void pcibr_target_interrupt(struct sn_irq_info *sn_irq_info)
+{
+	struct pcidev_info *pcidev_info;
+	struct pcibus_info *pcibus_info;
+	int bit = sn_irq_info->irq_int_bit;
+	u64 xtalk_addr = sn_irq_info->irq_xtalkaddr;
+
+	pcidev_info = (struct pcidev_info *)sn_irq_info->irq_pciioinfo;
+	if (pcidev_info) {
+		pcibus_info =
+		    (struct pcibus_info *)pcidev_info->pdi_host_pcidev_info->
+		    pdi_pcibus_info;
+
+		/* Disable the device's IRQ   */
+		pcireg_intr_enable_bit_clr(pcibus_info, (1 << bit));
+
+		/* Change the device's IRQ    */
+		pcireg_intr_addr_addr_set(pcibus_info, bit, xtalk_addr);
+
+		/* Re-enable the device's IRQ */
+		pcireg_intr_enable_bit_set(pcibus_info, (1 << bit));
+
+		pcibr_force_interrupt(sn_irq_info);
+	}
+}
+
+/*
+ * Provider entries for PIC/CP
+ */
+
+struct sn_pcibus_provider pcibr_provider = {
+	.dma_map = pcibr_dma_map,
+	.dma_map_consistent = pcibr_dma_map_consistent,
+	.dma_unmap = pcibr_dma_unmap,
+	.bus_fixup = pcibr_bus_fixup,
+	.force_interrupt = pcibr_force_interrupt,
+	.target_interrupt = pcibr_target_interrupt
+};
+
+int
+pcibr_init_provider(void)
+{
+	sn_pci_provider[PCIIO_ASIC_TYPE_PIC] = &pcibr_provider;
+	sn_pci_provider[PCIIO_ASIC_TYPE_TIOCP] = &pcibr_provider;
+
+	return 0;
+}
+
+EXPORT_SYMBOL_GPL(sal_pcibr_slot_enable);
+EXPORT_SYMBOL_GPL(sal_pcibr_slot_disable);
+EXPORT_SYMBOL_GPL(sn_ioboard_to_pci_bus);