Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

5 files changed, 1153 insertions, 0 deletions

diff --git a/kernel/arch/ia64/sn/pci/pcibr/Makefile b/kernel/arch/ia64/sn/pci/pcibr/Makefile
new file mode 100644
index 000000000..396bcae36
--- /dev/null
+++ b/kernel/arch/ia64/sn/pci/pcibr/Makefile
@@ -0,0 +1,13 @@
+#
+# 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) 2002-2004 Silicon Graphics, Inc.  All Rights Reserved.
+#
+# Makefile for the sn2 io routines.
+
+ccflags-y := -Iarch/ia64/sn/include
+
+obj-y				+=  pcibr_dma.o pcibr_reg.o \
+				    pcibr_ate.o pcibr_provider.o
diff --git a/kernel/arch/ia64/sn/pci/pcibr/pcibr_ate.c b/kernel/arch/ia64/sn/pci/pcibr/pcibr_ate.c
new file mode 100644
index 000000000..5bc34eac9
--- /dev/null
+++ b/kernel/arch/ia64/sn/pci/pcibr/pcibr_ate.c
@@ -0,0 +1,177 @@
+/*
+ * 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) 2001-2006 Silicon Graphics, Inc. All rights reserved.
+ */
+
+#include <linux/types.h>
+#include <asm/sn/sn_sal.h>
+#include <asm/sn/pcibr_provider.h>
+#include <asm/sn/pcibus_provider_defs.h>
+#include <asm/sn/pcidev.h>
+
+int pcibr_invalidate_ate;	/* by default don't invalidate ATE on free */
+
+/*
+ * mark_ate: Mark the ate as either free or inuse.
+ */
+static void mark_ate(struct ate_resource *ate_resource, int start, int number,
+		     u64 value)
+{
+	u64 *ate = ate_resource->ate;
+	int index;
+	int length = 0;
+
+	for (index = start; length < number; index++, length++)
+		ate[index] = value;
+}
+
+/*
+ * find_free_ate:  Find the first free ate index starting from the given
+ *		   index for the desired consecutive count.
+ */
+static int find_free_ate(struct ate_resource *ate_resource, int start,
+			 int count)
+{
+	u64 *ate = ate_resource->ate;
+	int index;
+	int start_free;
+
+	for (index = start; index < ate_resource->num_ate;) {
+		if (!ate[index]) {
+			int i;
+			int free;
+			free = 0;
+			start_free = index;	/* Found start free ate */
+			for (i = start_free; i < ate_resource->num_ate; i++) {
+				if (!ate[i]) {	/* This is free */
+					if (++free == count)
+						return start_free;
+				} else {
+					index = i + 1;
+					break;
+				}
+			}
+			if (i >= ate_resource->num_ate)
+				return -1;
+		} else
+			index++;	/* Try next ate */
+	}
+
+	return -1;
+}
+
+/*
+ * free_ate_resource:  Free the requested number of ATEs.
+ */
+static inline void free_ate_resource(struct ate_resource *ate_resource,
+				     int start)
+{
+	mark_ate(ate_resource, start, ate_resource->ate[start], 0);
+	if ((ate_resource->lowest_free_index > start) ||
+	    (ate_resource->lowest_free_index < 0))
+		ate_resource->lowest_free_index = start;
+}
+
+/*
+ * alloc_ate_resource:  Allocate the requested number of ATEs.
+ */
+static inline int alloc_ate_resource(struct ate_resource *ate_resource,
+				     int ate_needed)
+{
+	int start_index;
+
+	/*
+	 * Check for ate exhaustion.
+	 */
+	if (ate_resource->lowest_free_index < 0)
+		return -1;
+
+	/*
+	 * Find the required number of free consecutive ates.
+	 */
+	start_index =
+	    find_free_ate(ate_resource, ate_resource->lowest_free_index,
+			  ate_needed);
+	if (start_index >= 0)
+		mark_ate(ate_resource, start_index, ate_needed, ate_needed);
+
+	ate_resource->lowest_free_index =
+	    find_free_ate(ate_resource, ate_resource->lowest_free_index, 1);
+
+	return start_index;
+}
+
+/*
+ * Allocate "count" contiguous Bridge Address Translation Entries
+ * on the specified bridge to be used for PCI to XTALK mappings.
+ * Indices in rm map range from 1..num_entries.  Indices returned
+ * to caller range from 0..num_entries-1.
+ *
+ * Return the start index on success, -1 on failure.
+ */
+int pcibr_ate_alloc(struct pcibus_info *pcibus_info, int count)
+{
+	int status;
+	unsigned long flags;
+
+	spin_lock_irqsave(&pcibus_info->pbi_lock, flags);
+	status = alloc_ate_resource(&pcibus_info->pbi_int_ate_resource, count);
+	spin_unlock_irqrestore(&pcibus_info->pbi_lock, flags);
+
+	return status;
+}
+
+/*
+ * Setup an Address Translation Entry as specified.  Use either the Bridge
+ * internal maps or the external map RAM, as appropriate.
+ */
+static inline u64 __iomem *pcibr_ate_addr(struct pcibus_info *pcibus_info,
+				       int ate_index)
+{
+	if (ate_index < pcibus_info->pbi_int_ate_size) {
+		return pcireg_int_ate_addr(pcibus_info, ate_index);
+	}
+	panic("pcibr_ate_addr: invalid ate_index 0x%x", ate_index);
+}
+
+/*
+ * Update the ate.
+ */
+void inline
+ate_write(struct pcibus_info *pcibus_info, int ate_index, int count,
+	  volatile u64 ate)
+{
+	while (count-- > 0) {
+		if (ate_index < pcibus_info->pbi_int_ate_size) {
+			pcireg_int_ate_set(pcibus_info, ate_index, ate);
+		} else {
+			panic("ate_write: invalid ate_index 0x%x", ate_index);
+		}
+		ate_index++;
+		ate += IOPGSIZE;
+	}
+
+	pcireg_tflush_get(pcibus_info);	/* wait until Bridge PIO complete */
+}
+
+void pcibr_ate_free(struct pcibus_info *pcibus_info, int index)
+{
+
+	volatile u64 ate;
+	int count;
+	unsigned long flags;
+
+	if (pcibr_invalidate_ate) {
+		/* For debugging purposes, clear the valid bit in the ATE */
+		ate = *pcibr_ate_addr(pcibus_info, index);
+		count = pcibus_info->pbi_int_ate_resource.ate[index];
+		ate_write(pcibus_info, index, count, (ate & ~PCI32_ATE_V));
+	}
+
+	spin_lock_irqsave(&pcibus_info->pbi_lock, flags);
+	free_ate_resource(&pcibus_info->pbi_int_ate_resource, index);
+	spin_unlock_irqrestore(&pcibus_info->pbi_lock, flags);
+}
diff --git a/kernel/arch/ia64/sn/pci/pcibr/pcibr_dma.c b/kernel/arch/ia64/sn/pci/pcibr/pcibr_dma.c
new file mode 100644
index 000000000..1e863b277
--- /dev/null
+++ b/kernel/arch/ia64/sn/pci/pcibr/pcibr_dma.c
@@ -0,0 +1,413 @@
+/*
+ * 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) 2001-2005 Silicon Graphics, Inc. All rights reserved.
+ */
+
+#include <linux/types.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/pic.h>
+#include <asm/sn/sn_sal.h>
+#include <asm/sn/tiocp.h>
+#include "tio.h"
+#include "xtalk/xwidgetdev.h"
+#include "xtalk/hubdev.h"
+
+extern int sn_ioif_inited;
+
+/* =====================================================================
+ *    DMA MANAGEMENT
+ *
+ *      The Bridge ASIC provides three methods of doing DMA: via a "direct map"
+ *      register available in 32-bit PCI space (which selects a contiguous 2G
+ *	address space on some other widget), via "direct" addressing via 64-bit
+ *      PCI space (all destination information comes from the PCI address,
+ *      including transfer attributes), and via a "mapped" region that allows 
+ *      a bunch of different small mappings to be established with the PMU.
+ *
+ *      For efficiency, we most prefer to use the 32bit direct mapping facility,
+ *      since it requires no resource allocations. The advantage of using the
+ *      PMU over the 64-bit direct is that single-cycle PCI addressing can be
+ *      used; the advantage of using 64-bit direct over PMU addressing is that
+ *      we do not have to allocate entries in the PMU.
+ */
+
+static dma_addr_t
+pcibr_dmamap_ate32(struct pcidev_info *info,
+		   u64 paddr, size_t req_size, u64 flags, int dma_flags)
+{
+
+	struct pcidev_info *pcidev_info = info->pdi_host_pcidev_info;
+	struct pcibus_info *pcibus_info = (struct pcibus_info *)pcidev_info->
+	    pdi_pcibus_info;
+	u8 internal_device = (PCI_SLOT(pcidev_info->pdi_host_pcidev_info->
+					    pdi_linux_pcidev->devfn)) - 1;
+	int ate_count;
+	int ate_index;
+	u64 ate_flags = flags | PCI32_ATE_V;
+	u64 ate;
+	u64 pci_addr;
+	u64 xio_addr;
+	u64 offset;
+
+	/* PIC in PCI-X mode does not supports 32bit PageMap mode */
+	if (IS_PIC_SOFT(pcibus_info) && IS_PCIX(pcibus_info)) {
+		return 0;
+	}
+
+	/* Calculate the number of ATEs needed. */
+	if (!(MINIMAL_ATE_FLAG(paddr, req_size))) {
+		ate_count = IOPG((IOPGSIZE - 1)	/* worst case start offset */
+				 +req_size	/* max mapping bytes */
+				 - 1) + 1;	/* round UP */
+	} else {		/* assume requested target is page aligned */
+		ate_count = IOPG(req_size	/* max mapping bytes */
+				 - 1) + 1;	/* round UP */
+	}
+
+	/* Get the number of ATEs required. */
+	ate_index = pcibr_ate_alloc(pcibus_info, ate_count);
+	if (ate_index < 0)
+		return 0;
+
+	/* In PCI-X mode, Prefetch not supported */
+	if (IS_PCIX(pcibus_info))
+		ate_flags &= ~(PCI32_ATE_PREF);
+
+	if (SN_DMA_ADDRTYPE(dma_flags == SN_DMA_ADDR_PHYS))
+		xio_addr = IS_PIC_SOFT(pcibus_info) ? PHYS_TO_DMA(paddr) :
+	    					      PHYS_TO_TIODMA(paddr);
+	else
+		xio_addr = paddr;
+
+	offset = IOPGOFF(xio_addr);
+	ate = ate_flags | (xio_addr - offset);
+
+	/* If PIC, put the targetid in the ATE */
+	if (IS_PIC_SOFT(pcibus_info)) {
+		ate |= (pcibus_info->pbi_hub_xid << PIC_ATE_TARGETID_SHFT);
+	}
+
+	/*
+	 * If we're mapping for MSI, set the MSI bit in the ATE.  If it's a
+	 * TIOCP based pci bus, we also need to set the PIO bit in the ATE.
+	 */
+	if (dma_flags & SN_DMA_MSI) {
+		ate |= PCI32_ATE_MSI;
+		if (IS_TIOCP_SOFT(pcibus_info))
+			ate |= PCI32_ATE_PIO;
+	}
+
+	ate_write(pcibus_info, ate_index, ate_count, ate);
+
+	/*
+	 * Set up the DMA mapped Address.
+	 */
+	pci_addr = PCI32_MAPPED_BASE + offset + IOPGSIZE * ate_index;
+
+	/*
+	 * If swap was set in device in pcibr_endian_set()
+	 * we need to turn swapping on.
+	 */
+	if (pcibus_info->pbi_devreg[internal_device] & PCIBR_DEV_SWAP_DIR)
+		ATE_SWAP_ON(pci_addr);
+
+
+	return pci_addr;
+}
+
+static dma_addr_t
+pcibr_dmatrans_direct64(struct pcidev_info * info, u64 paddr,
+			u64 dma_attributes, int dma_flags)
+{
+	struct pcibus_info *pcibus_info = (struct pcibus_info *)
+	    ((info->pdi_host_pcidev_info)->pdi_pcibus_info);
+	u64 pci_addr;
+
+	/* Translate to Crosstalk View of Physical Address */
+	if (SN_DMA_ADDRTYPE(dma_flags) == SN_DMA_ADDR_PHYS)
+		pci_addr = IS_PIC_SOFT(pcibus_info) ?
+				PHYS_TO_DMA(paddr) :
+				PHYS_TO_TIODMA(paddr);
+	else
+		pci_addr = paddr;
+	pci_addr |= dma_attributes;
+
+	/* Handle Bus mode */
+	if (IS_PCIX(pcibus_info))
+		pci_addr &= ~PCI64_ATTR_PREF;
+
+	/* Handle Bridge Chipset differences */
+	if (IS_PIC_SOFT(pcibus_info)) {
+		pci_addr |=
+		    ((u64) pcibus_info->
+		     pbi_hub_xid << PIC_PCI64_ATTR_TARG_SHFT);
+	} else
+		pci_addr |= (dma_flags & SN_DMA_MSI) ?
+				TIOCP_PCI64_CMDTYPE_MSI :
+				TIOCP_PCI64_CMDTYPE_MEM;
+
+	/* If PCI mode, func zero uses VCHAN0, every other func uses VCHAN1 */
+	if (!IS_PCIX(pcibus_info) && PCI_FUNC(info->pdi_linux_pcidev->devfn))
+		pci_addr |= PCI64_ATTR_VIRTUAL;
+
+	return pci_addr;
+}
+
+static dma_addr_t
+pcibr_dmatrans_direct32(struct pcidev_info * info,
+			u64 paddr, size_t req_size, u64 flags, int dma_flags)
+{
+	struct pcidev_info *pcidev_info = info->pdi_host_pcidev_info;
+	struct pcibus_info *pcibus_info = (struct pcibus_info *)pcidev_info->
+	    pdi_pcibus_info;
+	u64 xio_addr;
+
+	u64 xio_base;
+	u64 offset;
+	u64 endoff;
+
+	if (IS_PCIX(pcibus_info)) {
+		return 0;
+	}
+
+	if (dma_flags & SN_DMA_MSI)
+		return 0;
+
+	if (SN_DMA_ADDRTYPE(dma_flags) == SN_DMA_ADDR_PHYS)
+		xio_addr = IS_PIC_SOFT(pcibus_info) ? PHYS_TO_DMA(paddr) :
+	    					      PHYS_TO_TIODMA(paddr);
+	else
+		xio_addr = paddr;
+
+	xio_base = pcibus_info->pbi_dir_xbase;
+	offset = xio_addr - xio_base;
+	endoff = req_size + offset;
+	if ((req_size > (1ULL << 31)) ||	/* Too Big */
+	    (xio_addr < xio_base) ||	/* Out of range for mappings */
+	    (endoff > (1ULL << 31))) {	/* Too Big */
+		return 0;
+	}
+
+	return PCI32_DIRECT_BASE | offset;
+}
+
+/*
+ * Wrapper routine for freeing DMA maps
+ * DMA mappings for Direct 64 and 32 do not have any DMA maps.
+ */
+void
+pcibr_dma_unmap(struct pci_dev *hwdev, dma_addr_t dma_handle, int direction)
+{
+	struct pcidev_info *pcidev_info = SN_PCIDEV_INFO(hwdev);
+	struct pcibus_info *pcibus_info =
+	    (struct pcibus_info *)pcidev_info->pdi_pcibus_info;
+
+	if (IS_PCI32_MAPPED(dma_handle)) {
+		int ate_index;
+
+		ate_index =
+		    IOPG((ATE_SWAP_OFF(dma_handle) - PCI32_MAPPED_BASE));
+		pcibr_ate_free(pcibus_info, ate_index);
+	}
+}
+
+/*
+ * On SN systems there is a race condition between a PIO read response and 
+ * DMA's.  In rare cases, the read response may beat the DMA, causing the
+ * driver to think that data in memory is complete and meaningful.  This code
+ * eliminates that race.  This routine is called by the PIO read routines
+ * after doing the read.  For PIC this routine then forces a fake interrupt
+ * on another line, which is logically associated with the slot that the PIO
+ * is addressed to.  It then spins while watching the memory location that
+ * the interrupt is targeted to.  When the interrupt response arrives, we 
+ * are sure that the DMA has landed in memory and it is safe for the driver
+ * to proceed.	For TIOCP use the Device(x) Write Request Buffer Flush 
+ * Bridge register since it ensures the data has entered the coherence domain,
+ * unlike the PIC Device(x) Write Request Buffer Flush register.
+ */
+
+void sn_dma_flush(u64 addr)
+{
+	nasid_t nasid;
+	int is_tio;
+	int wid_num;
+	int i, j;
+	unsigned long flags;
+	u64 itte;
+	struct hubdev_info *hubinfo;
+	struct sn_flush_device_kernel *p;
+	struct sn_flush_device_common *common;
+	struct sn_flush_nasid_entry *flush_nasid_list;
+
+	if (!sn_ioif_inited)
+		return;
+
+	nasid = NASID_GET(addr);
+	if (-1 == nasid_to_cnodeid(nasid))
+		return;
+
+	hubinfo = (NODEPDA(nasid_to_cnodeid(nasid)))->pdinfo;
+
+	BUG_ON(!hubinfo);
+
+	flush_nasid_list = &hubinfo->hdi_flush_nasid_list;
+	if (flush_nasid_list->widget_p == NULL)
+		return;
+
+	is_tio = (nasid & 1);
+	if (is_tio) {
+		int itte_index;
+
+		if (TIO_HWIN(addr))
+			itte_index = 0;
+		else if (TIO_BWIN_WINDOWNUM(addr))
+			itte_index = TIO_BWIN_WINDOWNUM(addr);
+		else
+			itte_index = -1;
+
+		if (itte_index >= 0) {
+			itte = flush_nasid_list->iio_itte[itte_index];
+			if (! TIO_ITTE_VALID(itte))
+				return;
+			wid_num = TIO_ITTE_WIDGET(itte);
+		} else
+			wid_num = TIO_SWIN_WIDGETNUM(addr);
+	} else {
+		if (BWIN_WINDOWNUM(addr)) {
+			itte = flush_nasid_list->iio_itte[BWIN_WINDOWNUM(addr)];
+			wid_num = IIO_ITTE_WIDGET(itte);
+		} else
+			wid_num = SWIN_WIDGETNUM(addr);
+	}
+	if (flush_nasid_list->widget_p[wid_num] == NULL)
+		return;
+	p = &flush_nasid_list->widget_p[wid_num][0];
+
+	/* find a matching BAR */
+	for (i = 0; i < DEV_PER_WIDGET; i++,p++) {
+		common = p->common;
+		for (j = 0; j < PCI_ROM_RESOURCE; j++) {
+			if (common->sfdl_bar_list[j].start == 0)
+				break;
+			if (addr >= common->sfdl_bar_list[j].start
+			    && addr <= common->sfdl_bar_list[j].end)
+				break;
+		}
+		if (j < PCI_ROM_RESOURCE && common->sfdl_bar_list[j].start != 0)
+			break;
+	}
+
+	/* if no matching BAR, return without doing anything. */
+	if (i == DEV_PER_WIDGET)
+		return;
+
+	/*
+	 * For TIOCP use the Device(x) Write Request Buffer Flush Bridge
+	 * register since it ensures the data has entered the coherence
+	 * domain, unlike PIC.
+	 */
+	if (is_tio) {
+		/*
+	 	 * Note:  devices behind TIOCE should never be matched in the
+		 * above code, and so the following code is PIC/CP centric.
+		 * If CE ever needs the sn_dma_flush mechanism, we will have
+		 * to account for that here and in tioce_bus_fixup().
+	 	 */
+		u32 tio_id = HUB_L(TIO_IOSPACE_ADDR(nasid, TIO_NODE_ID));
+		u32 revnum = XWIDGET_PART_REV_NUM(tio_id);
+
+		/* TIOCP BRINGUP WAR (PV907516): Don't write buffer flush reg */
+		if ((1 << XWIDGET_PART_REV_NUM_REV(revnum)) & PV907516) {
+			return;
+		} else {
+			pcireg_wrb_flush_get(common->sfdl_pcibus_info,
+					     (common->sfdl_slot - 1));
+		}
+	} else {
+		spin_lock_irqsave(&p->sfdl_flush_lock, flags);
+		*common->sfdl_flush_addr = 0;
+
+		/* force an interrupt. */
+		*(volatile u32 *)(common->sfdl_force_int_addr) = 1;
+
+		/* wait for the interrupt to come back. */
+		while (*(common->sfdl_flush_addr) != 0x10f)
+			cpu_relax();
+
+		/* okay, everything is synched up. */
+		spin_unlock_irqrestore(&p->sfdl_flush_lock, flags);
+	}
+	return;
+}
+
+/*
+ * DMA interfaces.  Called from pci_dma.c routines.
+ */
+
+dma_addr_t
+pcibr_dma_map(struct pci_dev * hwdev, unsigned long phys_addr, size_t size, int dma_flags)
+{
+	dma_addr_t dma_handle;
+	struct pcidev_info *pcidev_info = SN_PCIDEV_INFO(hwdev);
+
+	/* SN cannot support DMA addresses smaller than 32 bits. */
+	if (hwdev->dma_mask < 0x7fffffff) {
+		return 0;
+	}
+
+	if (hwdev->dma_mask == ~0UL) {
+		/*
+		 * Handle the most common case: 64 bit cards.  This
+		 * call should always succeed.
+		 */
+
+		dma_handle = pcibr_dmatrans_direct64(pcidev_info, phys_addr,
+						     PCI64_ATTR_PREF, dma_flags);
+	} else {
+		/* Handle 32-63 bit cards via direct mapping */
+		dma_handle = pcibr_dmatrans_direct32(pcidev_info, phys_addr,
+						     size, 0, dma_flags);
+		if (!dma_handle) {
+			/*
+			 * It is a 32 bit card and we cannot do direct mapping,
+			 * so we use an ATE.
+			 */
+
+			dma_handle = pcibr_dmamap_ate32(pcidev_info, phys_addr,
+							size, PCI32_ATE_PREF,
+							dma_flags);
+		}
+	}
+
+	return dma_handle;
+}
+
+dma_addr_t
+pcibr_dma_map_consistent(struct pci_dev * hwdev, unsigned long phys_addr,
+			 size_t size, int dma_flags)
+{
+	dma_addr_t dma_handle;
+	struct pcidev_info *pcidev_info = SN_PCIDEV_INFO(hwdev);
+
+	if (hwdev->dev.coherent_dma_mask == ~0UL) {
+		dma_handle = pcibr_dmatrans_direct64(pcidev_info, phys_addr,
+					    PCI64_ATTR_BAR, dma_flags);
+	} else {
+		dma_handle = (dma_addr_t) pcibr_dmamap_ate32(pcidev_info,
+						    phys_addr, size,
+						    PCI32_ATE_BAR, dma_flags);
+	}
+
+	return dma_handle;
+}
+
+EXPORT_SYMBOL(sn_dma_flush);
diff --git a/kernel/arch/ia64/sn/pci/pcibr/pcibr_provider.c b/kernel/arch/ia64/sn/pci/pcibr/pcibr_provider.c
new file mode 100644
index 000000000..8dbbef4a4
--- /dev/null
+++ b/kernel/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 =
+	    kzalloc(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);
diff --git a/kernel/arch/ia64/sn/pci/pcibr/pcibr_reg.c b/kernel/arch/ia64/sn/pci/pcibr/pcibr_reg.c
new file mode 100644
index 000000000..8b8bbd51d
--- /dev/null
+++ b/kernel/arch/ia64/sn/pci/pcibr/pcibr_reg.c
@@ -0,0 +1,285 @@
+/*
+ * 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) 2004 Silicon Graphics, Inc. All rights reserved.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/types.h>
+#include <asm/sn/io.h>
+#include <asm/sn/pcibr_provider.h>
+#include <asm/sn/pcibus_provider_defs.h>
+#include <asm/sn/pcidev.h>
+#include <asm/sn/pic.h>
+#include <asm/sn/tiocp.h>
+
+union br_ptr {
+	struct tiocp tio;
+	struct pic pic;
+};
+
+/*
+ * Control Register Access -- Read/Write                            0000_0020
+ */
+void pcireg_control_bit_clr(struct pcibus_info *pcibus_info, u64 bits)
+{
+	union br_ptr __iomem *ptr = (union br_ptr __iomem *)pcibus_info->pbi_buscommon.bs_base;
+
+	if (pcibus_info) {
+		switch (pcibus_info->pbi_bridge_type) {
+		case PCIBR_BRIDGETYPE_TIOCP:
+			__sn_clrq_relaxed(&ptr->tio.cp_control, bits);
+			break;
+		case PCIBR_BRIDGETYPE_PIC:
+			__sn_clrq_relaxed(&ptr->pic.p_wid_control, bits);
+			break;
+		default:
+			panic
+			    ("pcireg_control_bit_clr: unknown bridgetype bridge 0x%p",
+			     ptr);
+		}
+	}
+}
+
+void pcireg_control_bit_set(struct pcibus_info *pcibus_info, u64 bits)
+{
+	union br_ptr __iomem *ptr = (union br_ptr __iomem *)pcibus_info->pbi_buscommon.bs_base;
+
+	if (pcibus_info) {
+		switch (pcibus_info->pbi_bridge_type) {
+		case PCIBR_BRIDGETYPE_TIOCP:
+			__sn_setq_relaxed(&ptr->tio.cp_control, bits);
+			break;
+		case PCIBR_BRIDGETYPE_PIC:
+			__sn_setq_relaxed(&ptr->pic.p_wid_control, bits);
+			break;
+		default:
+			panic
+			    ("pcireg_control_bit_set: unknown bridgetype bridge 0x%p",
+			     ptr);
+		}
+	}
+}
+
+/*
+ * PCI/PCIX Target Flush Register Access -- Read Only		    0000_0050
+ */
+u64 pcireg_tflush_get(struct pcibus_info *pcibus_info)
+{
+	union br_ptr __iomem *ptr = (union br_ptr __iomem *)pcibus_info->pbi_buscommon.bs_base;
+	u64 ret = 0;
+
+	if (pcibus_info) {
+		switch (pcibus_info->pbi_bridge_type) {
+		case PCIBR_BRIDGETYPE_TIOCP:
+			ret = __sn_readq_relaxed(&ptr->tio.cp_tflush);
+			break;
+		case PCIBR_BRIDGETYPE_PIC:
+			ret = __sn_readq_relaxed(&ptr->pic.p_wid_tflush);
+			break;
+		default:
+			panic
+			    ("pcireg_tflush_get: unknown bridgetype bridge 0x%p",
+			     ptr);
+		}
+	}
+
+	/* Read of the Target Flush should always return zero */
+	if (ret != 0)
+		panic("pcireg_tflush_get:Target Flush failed\n");
+
+	return ret;
+}
+
+/*
+ * Interrupt Status Register Access -- Read Only		    0000_0100
+ */
+u64 pcireg_intr_status_get(struct pcibus_info * pcibus_info)
+{
+	union br_ptr __iomem *ptr = (union br_ptr __iomem *)pcibus_info->pbi_buscommon.bs_base;
+	u64 ret = 0;
+
+	if (pcibus_info) {
+		switch (pcibus_info->pbi_bridge_type) {
+		case PCIBR_BRIDGETYPE_TIOCP:
+			ret = __sn_readq_relaxed(&ptr->tio.cp_int_status);
+			break;
+		case PCIBR_BRIDGETYPE_PIC:
+			ret = __sn_readq_relaxed(&ptr->pic.p_int_status);
+			break;
+		default:
+			panic
+			    ("pcireg_intr_status_get: unknown bridgetype bridge 0x%p",
+			     ptr);
+		}
+	}
+	return ret;
+}
+
+/*
+ * Interrupt Enable Register Access -- Read/Write                   0000_0108
+ */
+void pcireg_intr_enable_bit_clr(struct pcibus_info *pcibus_info, u64 bits)
+{
+	union br_ptr __iomem *ptr = (union br_ptr __iomem *)pcibus_info->pbi_buscommon.bs_base;
+
+	if (pcibus_info) {
+		switch (pcibus_info->pbi_bridge_type) {
+		case PCIBR_BRIDGETYPE_TIOCP:
+			__sn_clrq_relaxed(&ptr->tio.cp_int_enable, bits);
+			break;
+		case PCIBR_BRIDGETYPE_PIC:
+			__sn_clrq_relaxed(&ptr->pic.p_int_enable, bits);
+			break;
+		default:
+			panic
+			    ("pcireg_intr_enable_bit_clr: unknown bridgetype bridge 0x%p",
+			     ptr);
+		}
+	}
+}
+
+void pcireg_intr_enable_bit_set(struct pcibus_info *pcibus_info, u64 bits)
+{
+	union br_ptr __iomem *ptr = (union br_ptr __iomem *)pcibus_info->pbi_buscommon.bs_base;
+
+	if (pcibus_info) {
+		switch (pcibus_info->pbi_bridge_type) {
+		case PCIBR_BRIDGETYPE_TIOCP:
+			__sn_setq_relaxed(&ptr->tio.cp_int_enable, bits);
+			break;
+		case PCIBR_BRIDGETYPE_PIC:
+			__sn_setq_relaxed(&ptr->pic.p_int_enable, bits);
+			break;
+		default:
+			panic
+			    ("pcireg_intr_enable_bit_set: unknown bridgetype bridge 0x%p",
+			     ptr);
+		}
+	}
+}
+
+/*
+ * Intr Host Address Register (int_addr) -- Read/Write  0000_0130 - 0000_0168
+ */
+void pcireg_intr_addr_addr_set(struct pcibus_info *pcibus_info, int int_n,
+			       u64 addr)
+{
+	union br_ptr __iomem *ptr = (union br_ptr __iomem *)pcibus_info->pbi_buscommon.bs_base;
+
+	if (pcibus_info) {
+		switch (pcibus_info->pbi_bridge_type) {
+		case PCIBR_BRIDGETYPE_TIOCP:
+			__sn_clrq_relaxed(&ptr->tio.cp_int_addr[int_n],
+			    TIOCP_HOST_INTR_ADDR);
+			__sn_setq_relaxed(&ptr->tio.cp_int_addr[int_n],
+			    (addr & TIOCP_HOST_INTR_ADDR));
+			break;
+		case PCIBR_BRIDGETYPE_PIC:
+			__sn_clrq_relaxed(&ptr->pic.p_int_addr[int_n],
+			    PIC_HOST_INTR_ADDR);
+			__sn_setq_relaxed(&ptr->pic.p_int_addr[int_n],
+			    (addr & PIC_HOST_INTR_ADDR));
+			break;
+		default:
+			panic
+			    ("pcireg_intr_addr_addr_get: unknown bridgetype bridge 0x%p",
+			     ptr);
+		}
+	}
+}
+
+/*
+ * Force Interrupt Register Access -- Write Only	0000_01C0 - 0000_01F8
+ */
+void pcireg_force_intr_set(struct pcibus_info *pcibus_info, int int_n)
+{
+	union br_ptr __iomem *ptr = (union br_ptr __iomem *)pcibus_info->pbi_buscommon.bs_base;
+
+	if (pcibus_info) {
+		switch (pcibus_info->pbi_bridge_type) {
+		case PCIBR_BRIDGETYPE_TIOCP:
+			writeq(1, &ptr->tio.cp_force_pin[int_n]);
+			break;
+		case PCIBR_BRIDGETYPE_PIC:
+			writeq(1, &ptr->pic.p_force_pin[int_n]);
+			break;
+		default:
+			panic
+			    ("pcireg_force_intr_set: unknown bridgetype bridge 0x%p",
+			     ptr);
+		}
+	}
+}
+
+/*
+ * Device(x) Write Buffer Flush Reg Access -- Read Only 0000_0240 - 0000_0258
+ */
+u64 pcireg_wrb_flush_get(struct pcibus_info *pcibus_info, int device)
+{
+	union br_ptr __iomem *ptr = (union br_ptr __iomem *)pcibus_info->pbi_buscommon.bs_base;
+	u64 ret = 0;
+
+	if (pcibus_info) {
+		switch (pcibus_info->pbi_bridge_type) {
+		case PCIBR_BRIDGETYPE_TIOCP:
+			ret =
+			    __sn_readq_relaxed(&ptr->tio.cp_wr_req_buf[device]);
+			break;
+		case PCIBR_BRIDGETYPE_PIC:
+			ret =
+			    __sn_readq_relaxed(&ptr->pic.p_wr_req_buf[device]);
+			break;
+		default:
+		      panic("pcireg_wrb_flush_get: unknown bridgetype bridge 0x%p", ptr);
+		}
+
+	}
+	/* Read of the Write Buffer Flush should always return zero */
+	return ret;
+}
+
+void pcireg_int_ate_set(struct pcibus_info *pcibus_info, int ate_index,
+			u64 val)
+{
+	union br_ptr __iomem *ptr = (union br_ptr __iomem *)pcibus_info->pbi_buscommon.bs_base;
+
+	if (pcibus_info) {
+		switch (pcibus_info->pbi_bridge_type) {
+		case PCIBR_BRIDGETYPE_TIOCP:
+			writeq(val, &ptr->tio.cp_int_ate_ram[ate_index]);
+			break;
+		case PCIBR_BRIDGETYPE_PIC:
+			writeq(val, &ptr->pic.p_int_ate_ram[ate_index]);
+			break;
+		default:
+			panic
+			    ("pcireg_int_ate_set: unknown bridgetype bridge 0x%p",
+			     ptr);
+		}
+	}
+}
+
+u64 __iomem *pcireg_int_ate_addr(struct pcibus_info *pcibus_info, int ate_index)
+{
+	union br_ptr __iomem *ptr = (union br_ptr __iomem *)pcibus_info->pbi_buscommon.bs_base;
+	u64 __iomem *ret = NULL;
+
+	if (pcibus_info) {
+		switch (pcibus_info->pbi_bridge_type) {
+		case PCIBR_BRIDGETYPE_TIOCP:
+			ret = &ptr->tio.cp_int_ate_ram[ate_index];
+			break;
+		case PCIBR_BRIDGETYPE_PIC:
+			ret = &ptr->pic.p_int_ate_ram[ate_index];
+			break;
+		default:
+			panic
+			    ("pcireg_int_ate_addr: unknown bridgetype bridge 0x%p",
+			     ptr);
+		}
+	}
+	return ret;
+}