*
* Rewrite, cleanup:
*
- * Copyright (C) 2004 Olof Johansson <olof@austin.ibm.com>, IBM Corporation
+ * 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.
*
#include <linux/types.h>
#include <linux/dma-mapping.h>
#include <linux/list.h>
+#include <linux/pci.h>
+#include <linux/module.h>
+#include <linux/slab.h>
#include <asm/iommu.h>
+#include <asm/vio.h>
#include <asm/tce.h>
#include <asm/machdep.h>
-#include <asm/iSeries/HvCallXm.h>
-#include <asm/iSeries/iSeries_pci.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>
-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)
+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;
- union tce_entry tce;
+ u64 tce, rpn;
while (npages--) {
- tce.te_word = 0;
- tce.te_bits.tb_rpn = virt_to_abs(uaddr) >> PAGE_SHIFT;
+ rpn = virt_to_abs(uaddr) >> TCE_SHIFT;
+ tce = (rpn & TCE_RPN_MASK) << TCE_RPN_SHIFT;
if (tbl->it_type == TCE_VB) {
/* Virtual Bus */
- tce.te_bits.tb_valid = 1;
- tce.te_bits.tb_allio = 1;
+ tce |= TCE_VALID|TCE_ALLIO;
if (direction != DMA_TO_DEVICE)
- tce.te_bits.tb_rdwr = 1;
+ tce |= TCE_VB_WRITE;
} else {
/* PCI Bus */
- tce.te_bits.tb_rdwr = 1; /* Read allowed */
+ tce |= TCE_PCI_READ; /* Read allowed */
if (direction != DMA_TO_DEVICE)
- tce.te_bits.tb_pciwr = 1;
+ tce |= TCE_PCI_WRITE;
}
- rc = HvCallXm_setTce((u64)tbl->it_index, (u64)index,
- tce.te_word);
+ rc = HvCallXm_setTce((u64)tbl->it_index, (u64)index, tce);
if (rc)
- panic("PCI_DMA: HvCallXm_setTce failed, Rc: 0x%lx\n",
+ panic("PCI_DMA: HvCallXm_setTce failed, Rc: 0x%llx\n",
rc);
index++;
- uaddr += PAGE_SIZE;
+ uaddr += TCE_PAGE_SIZE;
}
+ return 0;
}
static void tce_free_iSeries(struct iommu_table *tbl, long index, long npages)
while (npages--) {
rc = HvCallXm_setTce((u64)tbl->it_index, (u64)index, 0);
if (rc)
- panic("PCI_DMA: HvCallXm_setTce failed, Rc: 0x%lx\n",
+ panic("PCI_DMA: HvCallXm_setTce failed, Rc: 0x%llx\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.
+ * Structure passed to HvCallXm_getTceTableParms
*/
-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;
-}
+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.
* 2. TCE table per Bus.
* 3. TCE Table per IOA.
*/
-static void iommu_table_getparms(struct iSeries_Device_Node* dn,
- struct iommu_table* tbl)
+void iommu_table_getparms_iSeries(unsigned long busno,
+ unsigned char slotno,
+ unsigned char virtbus,
+ struct iommu_table* tbl)
{
struct iommu_table_cb *parms;
- parms = kmalloc(sizeof(*parms), GFP_KERNEL);
+ parms = kzalloc(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;
+ parms->itc_busno = busno;
+ parms->itc_slotno = slotno;
+ parms->itc_virtbus = virtbus;
- HvCallXm_getTceTableParms(ISERIES_HV_ADDR(parms));
+ 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_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 = TCE_PCI;
+ tbl->it_type = virtbus ? TCE_VB : TCE_PCI;
kfree(parms);
}
-void iommu_devnode_init_iSeries(struct iSeries_Device_Node *dn)
+#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 = kmalloc(sizeof(struct iommu_table), GFP_KERNEL);
- iommu_table_getparms(dn, tbl);
+ iommu_table_getparms_iSeries(pdn->busno, *lsn, 0, 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);
+ 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 void iommu_dev_setup_iSeries(struct pci_dev *dev) { }
-static void iommu_bus_setup_iSeries(struct pci_bus *bus) { }
+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.iommu_dev_setup = iommu_dev_setup_iSeries;
- ppc_md.iommu_bus_setup = iommu_bus_setup_iSeries;
-
- pci_iommu_init();
+ ppc_md.pci_dma_dev_setup = pci_dma_dev_setup_iseries;
+ set_pci_dma_ops(&dma_iommu_ops);
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff