powerpc: move pSeries files to arch/powerpc/platforms/pseries

Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 0 insertions, 606 deletions

diff --git a/arch/ppc64/kernel/pSeries_iommu.c b/arch/ppc64/kernel/pSeries_iommu.c
deleted file mode 100644
index 9e90d41131d8..000000000000
--- a/arch/ppc64/kernel/pSeries_iommu.c
+++ /dev/null
@@ -1,606 +0,0 @@
-/*
- * arch/ppc64/kernel/pSeries_iommu.c
- *
- * Copyright (C) 2001 Mike Corrigan & Dave Engebretsen, IBM Corporation
- *
- * Rewrite, cleanup: 
- *
- * Copyright (C) 2004 Olof Johansson <olof@austin.ibm.com>, IBM Corporation
- *
- * Dynamic DMA mapping support, pSeries-specific parts, both SMP and LPAR.
- *
- * 
- * 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; either version 2 of the License, or
- * (at your option) any later version.
- * 
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- * 
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
- */
-
-#include <linux/config.h>
-#include <linux/init.h>
-#include <linux/types.h>
-#include <linux/slab.h>
-#include <linux/mm.h>
-#include <linux/spinlock.h>
-#include <linux/string.h>
-#include <linux/pci.h>
-#include <linux/dma-mapping.h>
-#include <asm/io.h>
-#include <asm/prom.h>
-#include <asm/rtas.h>
-#include <asm/ppcdebug.h>
-#include <asm/iommu.h>
-#include <asm/pci-bridge.h>
-#include <asm/machdep.h>
-#include <asm/abs_addr.h>
-#include <asm/plpar_wrappers.h>
-#include <asm/pSeries_reconfig.h>
-#include <asm/systemcfg.h>
-#include <asm/firmware.h>
-#include <asm/tce.h>
-#include <asm/ppc-pci.h>
-
-#define DBG(fmt...)
-
-extern int is_python(struct device_node *);
-
-static void tce_build_pSeries(struct iommu_table *tbl, long index, 
-			      long npages, unsigned long uaddr, 
-			      enum dma_data_direction direction)
-{
-	union tce_entry t;
-	union tce_entry *tp;
-
-	index <<= TCE_PAGE_FACTOR;
-	npages <<= TCE_PAGE_FACTOR;
-
-	t.te_word = 0;
-	t.te_rdwr = 1; // Read allowed 
-
-	if (direction != DMA_TO_DEVICE)
-		t.te_pciwr = 1;
-
-	tp = ((union tce_entry *)tbl->it_base) + index;
-
-	while (npages--) {
-		/* can't move this out since we might cross LMB boundary */
-		t.te_rpn = (virt_to_abs(uaddr)) >> TCE_SHIFT;
-	
-		tp->te_word = t.te_word;
-
-		uaddr += TCE_PAGE_SIZE;
-		tp++;
-	}
-}
-
-
-static void tce_free_pSeries(struct iommu_table *tbl, long index, long npages)
-{
-	union tce_entry t;
-	union tce_entry *tp;
-
-	npages <<= TCE_PAGE_FACTOR;
-	index <<= TCE_PAGE_FACTOR;
-
-	t.te_word = 0;
-	tp  = ((union tce_entry *)tbl->it_base) + index;
-		
-	while (npages--) {
-		tp->te_word = t.te_word;
-		
-		tp++;
-	}
-}
-
-
-static void tce_build_pSeriesLP(struct iommu_table *tbl, long tcenum,
-				long npages, unsigned long uaddr,
-				enum dma_data_direction direction)
-{
-	u64 rc;
-	union tce_entry tce;
-
-	tce.te_word = 0;
-	tce.te_rpn = (virt_to_abs(uaddr)) >> TCE_SHIFT;
-	tce.te_rdwr = 1;
-	if (direction != DMA_TO_DEVICE)
-		tce.te_pciwr = 1;
-
-	while (npages--) {
-		rc = plpar_tce_put((u64)tbl->it_index, 
-				   (u64)tcenum << 12, 
-				   tce.te_word );
-		
-		if (rc && printk_ratelimit()) {
-			printk("tce_build_pSeriesLP: plpar_tce_put failed. rc=%ld\n", rc);
-			printk("\tindex   = 0x%lx\n", (u64)tbl->it_index);
-			printk("\ttcenum  = 0x%lx\n", (u64)tcenum);
-			printk("\ttce val = 0x%lx\n", tce.te_word );
-			show_stack(current, (unsigned long *)__get_SP());
-		}
-			
-		tcenum++;
-		tce.te_rpn++;
-	}
-}
-
-static DEFINE_PER_CPU(void *, tce_page) = NULL;
-
-static void tce_buildmulti_pSeriesLP(struct iommu_table *tbl, long tcenum,
-				     long npages, unsigned long uaddr,
-				     enum dma_data_direction direction)
-{
-	u64 rc;
-	union tce_entry tce, *tcep;
-	long l, limit;
-
-	tcenum <<= TCE_PAGE_FACTOR;
-	npages <<= TCE_PAGE_FACTOR;
-
-	if (npages == 1)
-		return tce_build_pSeriesLP(tbl, tcenum, npages, uaddr,
-					   direction);
-
-	tcep = __get_cpu_var(tce_page);
-
-	/* This is safe to do since interrupts are off when we're called
-	 * from iommu_alloc{,_sg}()
-	 */
-	if (!tcep) {
-		tcep = (void *)__get_free_page(GFP_ATOMIC);
-		/* If allocation fails, fall back to the loop implementation */
-		if (!tcep)
-			return tce_build_pSeriesLP(tbl, tcenum, npages,
-						   uaddr, direction);
-		__get_cpu_var(tce_page) = tcep;
-	}
-
-	tce.te_word = 0;
-	tce.te_rpn = (virt_to_abs(uaddr)) >> TCE_SHIFT;
-	tce.te_rdwr = 1;
-	if (direction != DMA_TO_DEVICE)
-		tce.te_pciwr = 1;
-
-	/* We can map max one pageful of TCEs at a time */
-	do {
-		/*
-		 * Set up the page with TCE data, looping through and setting
-		 * the values.
-		 */
-		limit = min_t(long, npages, 4096/sizeof(union tce_entry));
-
-		for (l = 0; l < limit; l++) {
-			tcep[l] = tce;
-			tce.te_rpn++;
-		}
-
-		rc = plpar_tce_put_indirect((u64)tbl->it_index,
-					    (u64)tcenum << 12,
-					    (u64)virt_to_abs(tcep),
-					    limit);
-
-		npages -= limit;
-		tcenum += limit;
-	} while (npages > 0 && !rc);
-
-	if (rc && printk_ratelimit()) {
-		printk("tce_buildmulti_pSeriesLP: plpar_tce_put failed. rc=%ld\n", rc);
-		printk("\tindex   = 0x%lx\n", (u64)tbl->it_index);
-		printk("\tnpages  = 0x%lx\n", (u64)npages);
-		printk("\ttce[0] val = 0x%lx\n", tcep[0].te_word);
-		show_stack(current, (unsigned long *)__get_SP());
-	}
-}
-
-static void tce_free_pSeriesLP(struct iommu_table *tbl, long tcenum, long npages)
-{
-	u64 rc;
-	union tce_entry tce;
-
-	tcenum <<= TCE_PAGE_FACTOR;
-	npages <<= TCE_PAGE_FACTOR;
-
-	tce.te_word = 0;
-
-	while (npages--) {
-		rc = plpar_tce_put((u64)tbl->it_index,
-				   (u64)tcenum << 12,
-				   tce.te_word);
-
-		if (rc && printk_ratelimit()) {
-			printk("tce_free_pSeriesLP: plpar_tce_put failed. rc=%ld\n", rc);
-			printk("\tindex   = 0x%lx\n", (u64)tbl->it_index);
-			printk("\ttcenum  = 0x%lx\n", (u64)tcenum);
-			printk("\ttce val = 0x%lx\n", tce.te_word );
-			show_stack(current, (unsigned long *)__get_SP());
-		}
-
-		tcenum++;
-	}
-}
-
-
-static void tce_freemulti_pSeriesLP(struct iommu_table *tbl, long tcenum, long npages)
-{
-	u64 rc;
-	union tce_entry tce;
-
-	tcenum <<= TCE_PAGE_FACTOR;
-	npages <<= TCE_PAGE_FACTOR;
-
-	tce.te_word = 0;
-
-	rc = plpar_tce_stuff((u64)tbl->it_index,
-			   (u64)tcenum << 12,
-			   tce.te_word,
-			   npages);
-
-	if (rc && printk_ratelimit()) {
-		printk("tce_freemulti_pSeriesLP: plpar_tce_stuff failed\n");
-		printk("\trc      = %ld\n", rc);
-		printk("\tindex   = 0x%lx\n", (u64)tbl->it_index);
-		printk("\tnpages  = 0x%lx\n", (u64)npages);
-		printk("\ttce val = 0x%lx\n", tce.te_word );
-		show_stack(current, (unsigned long *)__get_SP());
-	}
-}
-
-static void iommu_table_setparms(struct pci_controller *phb,
-				 struct device_node *dn,
-				 struct iommu_table *tbl) 
-{
-	struct device_node *node;
-	unsigned long *basep;
-	unsigned int *sizep;
-
-	node = (struct device_node *)phb->arch_data;
-
-	basep = (unsigned long *)get_property(node, "linux,tce-base", NULL);
-	sizep = (unsigned int *)get_property(node, "linux,tce-size", NULL);
-	if (basep == NULL || sizep == NULL) {
-		printk(KERN_ERR "PCI_DMA: iommu_table_setparms: %s has "
-				"missing tce entries !\n", dn->full_name);
-		return;
-	}
-
-	tbl->it_base = (unsigned long)__va(*basep);
-	memset((void *)tbl->it_base, 0, *sizep);
-
-	tbl->it_busno = phb->bus->number;
-	
-	/* Units of tce entries */
-	tbl->it_offset = phb->dma_window_base_cur >> PAGE_SHIFT;
-	
-	/* Test if we are going over 2GB of DMA space */
-	if (phb->dma_window_base_cur + phb->dma_window_size > 0x80000000ul) {
-		udbg_printf("PCI_DMA: Unexpected number of IOAs under this PHB.\n");
-		panic("PCI_DMA: Unexpected number of IOAs under this PHB.\n"); 
-	}
-	
-	phb->dma_window_base_cur += phb->dma_window_size;
-
-	/* Set the tce table size - measured in entries */
-	tbl->it_size = phb->dma_window_size >> PAGE_SHIFT;
-
-	tbl->it_index = 0;
-	tbl->it_blocksize = 16;
-	tbl->it_type = TCE_PCI;
-}
-
-/*
- * iommu_table_setparms_lpar
- *
- * Function: On pSeries LPAR systems, return TCE table info, given a pci bus.
- *
- * ToDo: properly interpret the ibm,dma-window property.  The definition is:
- *	logical-bus-number	(1 word)
- *	phys-address		(#address-cells words)
- *	size			(#cell-size words)
- *
- * Currently we hard code these sizes (more or less).
- */
-static void iommu_table_setparms_lpar(struct pci_controller *phb,
-				      struct device_node *dn,
-				      struct iommu_table *tbl,
-				      unsigned int *dma_window)
-{
-	tbl->it_busno  = PCI_DN(dn)->bussubno;
-
-	/* TODO: Parse field size properties properly. */
-	tbl->it_size   = (((unsigned long)dma_window[4] << 32) |
-			   (unsigned long)dma_window[5]) >> PAGE_SHIFT;
-	tbl->it_offset = (((unsigned long)dma_window[2] << 32) |
-			   (unsigned long)dma_window[3]) >> PAGE_SHIFT;
-	tbl->it_base   = 0;
-	tbl->it_index  = dma_window[0];
-	tbl->it_blocksize  = 16;
-	tbl->it_type = TCE_PCI;
-}
-
-static void iommu_bus_setup_pSeries(struct pci_bus *bus)
-{
-	struct device_node *dn;
-	struct iommu_table *tbl;
-	struct device_node *isa_dn, *isa_dn_orig;
-	struct device_node *tmp;
-	struct pci_dn *pci;
-	int children;
-
-	DBG("iommu_bus_setup_pSeries, bus %p, bus->self %p\n", bus, bus->self);
-
-	dn = pci_bus_to_OF_node(bus);
-	pci = PCI_DN(dn);
-
-	if (bus->self) {
-		/* This is not a root bus, any setup will be done for the
-		 * device-side of the bridge in iommu_dev_setup_pSeries().
-		 */
-		return;
-	}
-
-	/* Check if the ISA bus on the system is under
-	 * this PHB.
-	 */
-	isa_dn = isa_dn_orig = of_find_node_by_type(NULL, "isa");
-
-	while (isa_dn && isa_dn != dn)
-		isa_dn = isa_dn->parent;
-
-	if (isa_dn_orig)
-		of_node_put(isa_dn_orig);
-
-	/* Count number of direct PCI children of the PHB.
-	 * All PCI device nodes have class-code property, so it's
-	 * an easy way to find them.
-	 */
-	for (children = 0, tmp = dn->child; tmp; tmp = tmp->sibling)
-		if (get_property(tmp, "class-code", NULL))
-			children++;
-
-	DBG("Children: %d\n", children);
-
-	/* Calculate amount of DMA window per slot. Each window must be
-	 * a power of two (due to pci_alloc_consistent requirements).
-	 *
-	 * Keep 256MB aside for PHBs with ISA.
-	 */
-
-	if (!isa_dn) {
-		/* No ISA/IDE - just set window size and return */
-		pci->phb->dma_window_size = 0x80000000ul; /* To be divided */
-
-		while (pci->phb->dma_window_size * children > 0x80000000ul)
-			pci->phb->dma_window_size >>= 1;
-		DBG("No ISA/IDE, window size is 0x%lx\n",
-			pci->phb->dma_window_size);
-		pci->phb->dma_window_base_cur = 0;
-
-		return;
-	}
-
-	/* If we have ISA, then we probably have an IDE
-	 * controller too. Allocate a 128MB table but
-	 * skip the first 128MB to avoid stepping on ISA
-	 * space.
-	 */
-	pci->phb->dma_window_size = 0x8000000ul;
-	pci->phb->dma_window_base_cur = 0x8000000ul;
-
-	tbl = kmalloc(sizeof(struct iommu_table), GFP_KERNEL);
-
-	iommu_table_setparms(pci->phb, dn, tbl);
-	pci->iommu_table = iommu_init_table(tbl);
-
-	/* Divide the rest (1.75GB) among the children */
-	pci->phb->dma_window_size = 0x80000000ul;
-	while (pci->phb->dma_window_size * children > 0x70000000ul)
-		pci->phb->dma_window_size >>= 1;
-
-	DBG("ISA/IDE, window size is 0x%lx\n", pci->phb->dma_window_size);
-
-}
-
-
-static void iommu_bus_setup_pSeriesLP(struct pci_bus *bus)
-{
-	struct iommu_table *tbl;
-	struct device_node *dn, *pdn;
-	struct pci_dn *ppci;
-	unsigned int *dma_window = NULL;
-
-	DBG("iommu_bus_setup_pSeriesLP, bus %p, bus->self %p\n", bus, bus->self);
-
-	dn = pci_bus_to_OF_node(bus);
-
-	/* Find nearest ibm,dma-window, walking up the device tree */
-	for (pdn = dn; pdn != NULL; pdn = pdn->parent) {
-		dma_window = (unsigned int *)get_property(pdn, "ibm,dma-window", NULL);
-		if (dma_window != NULL)
-			break;
-	}
-
-	if (dma_window == NULL) {
-		DBG("iommu_bus_setup_pSeriesLP: bus %s seems to have no ibm,dma-window property\n", dn->full_name);
-		return;
-	}
-
-	ppci = pdn->data;
-	if (!ppci->iommu_table) {
-		/* Bussubno hasn't been copied yet.
-		 * Do it now because iommu_table_setparms_lpar needs it.
-		 */
-
-		ppci->bussubno = bus->number;
-
-		tbl = (struct iommu_table *)kmalloc(sizeof(struct iommu_table),
-						    GFP_KERNEL);
-	
-		iommu_table_setparms_lpar(ppci->phb, pdn, tbl, dma_window);
-
-		ppci->iommu_table = iommu_init_table(tbl);
-	}
-
-	if (pdn != dn)
-		PCI_DN(dn)->iommu_table = ppci->iommu_table;
-}
-
-
-static void iommu_dev_setup_pSeries(struct pci_dev *dev)
-{
-	struct device_node *dn, *mydn;
-	struct iommu_table *tbl;
-
-	DBG("iommu_dev_setup_pSeries, dev %p (%s)\n", dev, pci_name(dev));
-
-	mydn = dn = pci_device_to_OF_node(dev);
-
-	/* If we're the direct child of a root bus, then we need to allocate
-	 * an iommu table ourselves. The bus setup code should have setup
-	 * the window sizes already.
-	 */
-	if (!dev->bus->self) {
-		DBG(" --> first child, no bridge. Allocating iommu table.\n");
-		tbl = kmalloc(sizeof(struct iommu_table), GFP_KERNEL);
-		iommu_table_setparms(PCI_DN(dn)->phb, dn, tbl);
-		PCI_DN(mydn)->iommu_table = iommu_init_table(tbl);
-
-		return;
-	}
-
-	/* If this device is further down the bus tree, search upwards until
-	 * an already allocated iommu table is found and use that.
-	 */
-
-	while (dn && dn->data && PCI_DN(dn)->iommu_table == NULL)
-		dn = dn->parent;
-
-	if (dn && dn->data) {
-		PCI_DN(mydn)->iommu_table = PCI_DN(dn)->iommu_table;
-	} else {
-		DBG("iommu_dev_setup_pSeries, dev %p (%s) has no iommu table\n", dev, pci_name(dev));
-	}
-}
-
-static int iommu_reconfig_notifier(struct notifier_block *nb, unsigned long action, void *node)
-{
-	int err = NOTIFY_OK;
-	struct device_node *np = node;
-	struct pci_dn *pci = np->data;
-
-	switch (action) {
-	case PSERIES_RECONFIG_REMOVE:
-		if (pci->iommu_table &&
-		    get_property(np, "ibm,dma-window", NULL))
-			iommu_free_table(np);
-		break;
-	default:
-		err = NOTIFY_DONE;
-		break;
-	}
-	return err;
-}
-
-static struct notifier_block iommu_reconfig_nb = {
-	.notifier_call = iommu_reconfig_notifier,
-};
-
-static void iommu_dev_setup_pSeriesLP(struct pci_dev *dev)
-{
-	struct device_node *pdn, *dn;
-	struct iommu_table *tbl;
-	int *dma_window = NULL;
-	struct pci_dn *pci;
-
-	DBG("iommu_dev_setup_pSeriesLP, dev %p (%s)\n", dev, pci_name(dev));
-
-	/* dev setup for LPAR is a little tricky, since the device tree might
-	 * contain the dma-window properties per-device and not neccesarily
-	 * for the bus. So we need to search upwards in the tree until we
-	 * either hit a dma-window property, OR find a parent with a table
-	 * already allocated.
-	 */
-	dn = pci_device_to_OF_node(dev);
-
-	for (pdn = dn; pdn && pdn->data && !PCI_DN(pdn)->iommu_table;
-	     pdn = pdn->parent) {
-		dma_window = (unsigned int *)
-			get_property(pdn, "ibm,dma-window", NULL);
-		if (dma_window)
-			break;
-	}
-
-	/* Check for parent == NULL so we don't try to setup the empty EADS
-	 * slots on POWER4 machines.
-	 */
-	if (dma_window == NULL || pdn->parent == NULL) {
-		DBG("No dma window for device, linking to parent\n");
-		PCI_DN(dn)->iommu_table = PCI_DN(pdn)->iommu_table;
-		return;
-	} else {
-		DBG("Found DMA window, allocating table\n");
-	}
-
-	pci = pdn->data;
-	if (!pci->iommu_table) {
-		/* iommu_table_setparms_lpar needs bussubno. */
-		pci->bussubno = pci->phb->bus->number;
-
-		tbl = (struct iommu_table *)kmalloc(sizeof(struct iommu_table),
-						    GFP_KERNEL);
-
-		iommu_table_setparms_lpar(pci->phb, pdn, tbl, dma_window);
-
-		pci->iommu_table = iommu_init_table(tbl);
-	}
-
-	if (pdn != dn)
-		PCI_DN(dn)->iommu_table = pci->iommu_table;
-}
-
-static void iommu_bus_setup_null(struct pci_bus *b) { }
-static void iommu_dev_setup_null(struct pci_dev *d) { }
-
-/* These are called very early. */
-void iommu_init_early_pSeries(void)
-{
-	if (of_chosen && get_property(of_chosen, "linux,iommu-off", NULL)) {
-		/* Direct I/O, IOMMU off */
-		ppc_md.iommu_dev_setup = iommu_dev_setup_null;
-		ppc_md.iommu_bus_setup = iommu_bus_setup_null;
-		pci_direct_iommu_init();
-
-		return;
-	}
-
-	if (systemcfg->platform & PLATFORM_LPAR) {
-		if (firmware_has_feature(FW_FEATURE_MULTITCE)) {
-			ppc_md.tce_build = tce_buildmulti_pSeriesLP;
-			ppc_md.tce_free	 = tce_freemulti_pSeriesLP;
-		} else {
-			ppc_md.tce_build = tce_build_pSeriesLP;
-			ppc_md.tce_free	 = tce_free_pSeriesLP;
-		}
-		ppc_md.iommu_bus_setup = iommu_bus_setup_pSeriesLP;
-		ppc_md.iommu_dev_setup = iommu_dev_setup_pSeriesLP;
-	} else {
-		ppc_md.tce_build = tce_build_pSeries;
-		ppc_md.tce_free  = tce_free_pSeries;
-		ppc_md.iommu_bus_setup = iommu_bus_setup_pSeries;
-		ppc_md.iommu_dev_setup = iommu_dev_setup_pSeries;
-	}
-
-
-	pSeries_reconfig_notifier_register(&iommu_reconfig_nb);
-
-	pci_iommu_init();
-}
-