diff options
Diffstat (limited to 'arch/ppc64/kernel/iSeries_iommu.c')
| -rw-r--r-- | arch/ppc64/kernel/iSeries_iommu.c | 176 |
1 files changed, 0 insertions, 176 deletions
diff --git a/arch/ppc64/kernel/iSeries_iommu.c b/arch/ppc64/kernel/iSeries_iommu.c deleted file mode 100644 index f8ff1bb054d..00000000000 --- a/arch/ppc64/kernel/iSeries_iommu.c +++ /dev/null @@ -1,176 +0,0 @@ -/* - * arch/ppc64/kernel/iSeries_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, 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 <asm/iommu.h> -#include <asm/machdep.h> -#include <asm/iSeries/HvCallXm.h> -#include <asm/iSeries/iSeries_pci.h> - -extern struct list_head iSeries_Global_Device_List; - - -static void tce_build_iSeries(struct iommu_table *tbl, long index, long npages, - unsigned long uaddr, enum dma_data_direction direction) -{ - u64 rc; - union tce_entry tce; - - while (npages--) { - tce.te_word = 0; - tce.te_bits.tb_rpn = virt_to_abs(uaddr) >> PAGE_SHIFT; - - if (tbl->it_type == TCE_VB) { - /* Virtual Bus */ - tce.te_bits.tb_valid = 1; - tce.te_bits.tb_allio = 1; - if (direction != DMA_TO_DEVICE) - tce.te_bits.tb_rdwr = 1; - } else { - /* PCI Bus */ - tce.te_bits.tb_rdwr = 1; /* Read allowed */ - if (direction != DMA_TO_DEVICE) - tce.te_bits.tb_pciwr = 1; - } - - rc = HvCallXm_setTce((u64)tbl->it_index, (u64)index, - tce.te_word); - if (rc) - panic("PCI_DMA: HvCallXm_setTce failed, Rc: 0x%lx\n", - rc); - index++; - uaddr += PAGE_SIZE; - } -} - -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%lx\n", - rc); - index++; - } -} - -#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 iSeries_Device_Node *dp; - - list_for_each_entry(dp, &iSeries_Global_Device_List, Device_List) { - if ((dp->iommu_table != NULL) && - (dp->iommu_table->it_type == TCE_PCI) && - (dp->iommu_table->it_offset == tbl->it_offset) && - (dp->iommu_table->it_index == tbl->it_index) && - (dp->iommu_table->it_size == tbl->it_size)) - return dp->iommu_table; - } - return NULL; -} - -/* - * 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. - */ -static void iommu_table_getparms(struct iSeries_Device_Node* dn, - struct iommu_table* tbl) -{ - struct iommu_table_cb *parms; - - parms = kmalloc(sizeof(*parms), GFP_KERNEL); - if (parms == NULL) - panic("PCI_DMA: TCE Table Allocation failed."); - - memset(parms, 0, sizeof(*parms)); - - parms->itc_busno = ISERIES_BUS(dn); - parms->itc_slotno = dn->LogicalSlot; - parms->itc_virtbus = 0; - - 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 * PAGE_SIZE) / sizeof(union tce_entry); - 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 = TCE_PCI; - - kfree(parms); -} - - -void iommu_devnode_init_iSeries(struct iSeries_Device_Node *dn) -{ - struct iommu_table *tbl; - - tbl = kmalloc(sizeof(struct iommu_table), GFP_KERNEL); - - iommu_table_getparms(dn, tbl); - - /* Look for existing tce table */ - dn->iommu_table = iommu_table_find(tbl); - if (dn->iommu_table == NULL) - dn->iommu_table = iommu_init_table(tbl); - else - kfree(tbl); -} -#endif - -static void iommu_dev_setup_iSeries(struct pci_dev *dev) { } -static void iommu_bus_setup_iSeries(struct pci_bus *bus) { } - -void iommu_init_early_iSeries(void) -{ - ppc_md.tce_build = tce_build_iSeries; - ppc_md.tce_free = tce_free_iSeries; - - ppc_md.iommu_dev_setup = iommu_dev_setup_iSeries; - ppc_md.iommu_bus_setup = iommu_bus_setup_iSeries; - - pci_iommu_init(); -} |