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-rw-r--r--arch/powerpc/platforms/iseries/iommu.c260
1 files changed, 0 insertions, 260 deletions
diff --git a/arch/powerpc/platforms/iseries/iommu.c b/arch/powerpc/platforms/iseries/iommu.c
deleted file mode 100644
index 2f3d9110248c..000000000000
--- a/arch/powerpc/platforms/iseries/iommu.c
+++ /dev/null
@@ -1,260 +0,0 @@
-/*
- * Copyright (C) 2001 Mike Corrigan & Dave Engebretsen, IBM Corporation
- *
- * Rewrite, cleanup:
- *
- * Copyright (C) 2004 Olof Johansson <olof@lixom.net>, IBM Corporation
- * Copyright (C) 2006 Olof Johansson <olof@lixom.net>
- *
- * Dynamic DMA mapping support, iSeries-specific parts.
- *
- *
- * 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/types.h>
-#include <linux/dma-mapping.h>
-#include <linux/list.h>
-#include <linux/pci.h>
-#include <linux/export.h>
-#include <linux/slab.h>
-
-#include <asm/iommu.h>
-#include <asm/vio.h>
-#include <asm/tce.h>
-#include <asm/machdep.h>
-#include <asm/abs_addr.h>
-#include <asm/prom.h>
-#include <asm/pci-bridge.h>
-#include <asm/iseries/hv_call_xm.h>
-#include <asm/iseries/hv_call_event.h>
-#include <asm/iseries/iommu.h>
-
-static int tce_build_iSeries(struct iommu_table *tbl, long index, long npages,
- unsigned long uaddr, enum dma_data_direction direction,
- struct dma_attrs *attrs)
-{
- u64 rc;
- u64 tce, rpn;
-
- while (npages--) {
- rpn = virt_to_abs(uaddr) >> TCE_SHIFT;
- tce = (rpn & TCE_RPN_MASK) << TCE_RPN_SHIFT;
-
- if (tbl->it_type == TCE_VB) {
- /* Virtual Bus */
- tce |= TCE_VALID|TCE_ALLIO;
- if (direction != DMA_TO_DEVICE)
- tce |= TCE_VB_WRITE;
- } else {
- /* PCI Bus */
- tce |= TCE_PCI_READ; /* Read allowed */
- if (direction != DMA_TO_DEVICE)
- tce |= TCE_PCI_WRITE;
- }
-
- rc = HvCallXm_setTce((u64)tbl->it_index, (u64)index, tce);
- if (rc)
- panic("PCI_DMA: HvCallXm_setTce failed, Rc: 0x%llx\n",
- rc);
- index++;
- uaddr += TCE_PAGE_SIZE;
- }
- return 0;
-}
-
-static void tce_free_iSeries(struct iommu_table *tbl, long index, long npages)
-{
- u64 rc;
-
- while (npages--) {
- rc = HvCallXm_setTce((u64)tbl->it_index, (u64)index, 0);
- if (rc)
- panic("PCI_DMA: HvCallXm_setTce failed, Rc: 0x%llx\n",
- rc);
- index++;
- }
-}
-
-/*
- * Structure passed to HvCallXm_getTceTableParms
- */
-struct iommu_table_cb {
- unsigned long itc_busno; /* Bus number for this tce table */
- unsigned long itc_start; /* Will be NULL for secondary */
- unsigned long itc_totalsize; /* Size (in pages) of whole table */
- unsigned long itc_offset; /* Index into real tce table of the
- start of our section */
- unsigned long itc_size; /* Size (in pages) of our section */
- unsigned long itc_index; /* Index of this tce table */
- unsigned short itc_maxtables; /* Max num of tables for partition */
- unsigned char itc_virtbus; /* Flag to indicate virtual bus */
- unsigned char itc_slotno; /* IOA Tce Slot Index */
- unsigned char itc_rsvd[4];
-};
-
-/*
- * Call Hv with the architected data structure to get TCE table info.
- * info. Put the returned data into the Linux representation of the
- * TCE table data.
- * The Hardware Tce table comes in three flavors.
- * 1. TCE table shared between Buses.
- * 2. TCE table per Bus.
- * 3. TCE Table per IOA.
- */
-void iommu_table_getparms_iSeries(unsigned long busno,
- unsigned char slotno,
- unsigned char virtbus,
- struct iommu_table* tbl)
-{
- struct iommu_table_cb *parms;
-
- parms = kzalloc(sizeof(*parms), GFP_KERNEL);
- if (parms == NULL)
- panic("PCI_DMA: TCE Table Allocation failed.");
-
- parms->itc_busno = busno;
- parms->itc_slotno = slotno;
- parms->itc_virtbus = virtbus;
-
- HvCallXm_getTceTableParms(iseries_hv_addr(parms));
-
- if (parms->itc_size == 0)
- panic("PCI_DMA: parms->size is zero, parms is 0x%p", parms);
-
- /* itc_size is in pages worth of table, it_size is in # of entries */
- tbl->it_size = (parms->itc_size * TCE_PAGE_SIZE) / TCE_ENTRY_SIZE;
- tbl->it_busno = parms->itc_busno;
- tbl->it_offset = parms->itc_offset;
- tbl->it_index = parms->itc_index;
- tbl->it_blocksize = 1;
- tbl->it_type = virtbus ? TCE_VB : TCE_PCI;
-
- kfree(parms);
-}
-
-
-#ifdef CONFIG_PCI
-/*
- * This function compares the known tables to find an iommu_table
- * that has already been built for hardware TCEs.
- */
-static struct iommu_table *iommu_table_find(struct iommu_table * tbl)
-{
- struct device_node *node;
-
- for (node = NULL; (node = of_find_all_nodes(node)); ) {
- struct pci_dn *pdn = PCI_DN(node);
- struct iommu_table *it;
-
- if (pdn == NULL)
- continue;
- it = pdn->iommu_table;
- if ((it != NULL) &&
- (it->it_type == TCE_PCI) &&
- (it->it_offset == tbl->it_offset) &&
- (it->it_index == tbl->it_index) &&
- (it->it_size == tbl->it_size)) {
- of_node_put(node);
- return it;
- }
- }
- return NULL;
-}
-
-
-static void pci_dma_dev_setup_iseries(struct pci_dev *pdev)
-{
- struct iommu_table *tbl;
- struct device_node *dn = pci_device_to_OF_node(pdev);
- struct pci_dn *pdn = PCI_DN(dn);
- const u32 *lsn = of_get_property(dn, "linux,logical-slot-number", NULL);
-
- BUG_ON(lsn == NULL);
-
- tbl = kzalloc(sizeof(struct iommu_table), GFP_KERNEL);
-
- iommu_table_getparms_iSeries(pdn->busno, *lsn, 0, tbl);
-
- /* Look for existing tce table */
- pdn->iommu_table = iommu_table_find(tbl);
- if (pdn->iommu_table == NULL)
- pdn->iommu_table = iommu_init_table(tbl, -1);
- else
- kfree(tbl);
- set_iommu_table_base(&pdev->dev, pdn->iommu_table);
-}
-#else
-#define pci_dma_dev_setup_iseries NULL
-#endif
-
-static struct iommu_table veth_iommu_table;
-static struct iommu_table vio_iommu_table;
-
-void *iseries_hv_alloc(size_t size, dma_addr_t *dma_handle, gfp_t flag)
-{
- return iommu_alloc_coherent(NULL, &vio_iommu_table, size, dma_handle,
- DMA_BIT_MASK(32), flag, -1);
-}
-EXPORT_SYMBOL_GPL(iseries_hv_alloc);
-
-void iseries_hv_free(size_t size, void *vaddr, dma_addr_t dma_handle)
-{
- iommu_free_coherent(&vio_iommu_table, size, vaddr, dma_handle);
-}
-EXPORT_SYMBOL_GPL(iseries_hv_free);
-
-dma_addr_t iseries_hv_map(void *vaddr, size_t size,
- enum dma_data_direction direction)
-{
- return iommu_map_page(NULL, &vio_iommu_table, virt_to_page(vaddr),
- (unsigned long)vaddr % PAGE_SIZE, size,
- DMA_BIT_MASK(32), direction, NULL);
-}
-
-void iseries_hv_unmap(dma_addr_t dma_handle, size_t size,
- enum dma_data_direction direction)
-{
- iommu_unmap_page(&vio_iommu_table, dma_handle, size, direction, NULL);
-}
-
-void __init iommu_vio_init(void)
-{
- iommu_table_getparms_iSeries(255, 0, 0xff, &veth_iommu_table);
- veth_iommu_table.it_size /= 2;
- vio_iommu_table = veth_iommu_table;
- vio_iommu_table.it_offset += veth_iommu_table.it_size;
-
- if (!iommu_init_table(&veth_iommu_table, -1))
- printk("Virtual Bus VETH TCE table failed.\n");
- if (!iommu_init_table(&vio_iommu_table, -1))
- printk("Virtual Bus VIO TCE table failed.\n");
-}
-
-struct iommu_table *vio_build_iommu_table_iseries(struct vio_dev *dev)
-{
- if (strcmp(dev->type, "network") == 0)
- return &veth_iommu_table;
- return &vio_iommu_table;
-}
-
-void iommu_init_early_iSeries(void)
-{
- ppc_md.tce_build = tce_build_iSeries;
- ppc_md.tce_free = tce_free_iSeries;
-
- ppc_md.pci_dma_dev_setup = pci_dma_dev_setup_iseries;
- set_pci_dma_ops(&dma_iommu_ops);
-}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.