powerpc/spapr: vfio: Replace iommu_table with iommu_table_group

Modern IBM POWERPC systems support multiple (currently two) TCE tables
per IOMMU group (a.k.a. PE). This adds a iommu_table_group container
for TCE tables. Right now just one table is supported.

This defines iommu_table_group struct which stores pointers to
iommu_group and iommu_table(s). This replaces iommu_table with
iommu_table_group where iommu_table was used to identify a group:
- iommu_register_group();
- iommudata of generic iommu_group;

This removes @data from iommu_table as it_table_group provides
same access to pnv_ioda_pe.

For IODA, instead of embedding iommu_table, the new iommu_table_group
keeps pointers to those. The iommu_table structs are allocated
dynamically.

For P5IOC2, both iommu_table_group and iommu_table are embedded into
PE struct. As there is no EEH and SRIOV support for P5IOC2,
iommu_free_table() should not be called on iommu_table struct pointers
so we can keep it embedded in pnv_phb::p5ioc2.

For pSeries, this replaces multiple calls of kzalloc_node() with a new
iommu_pseries_alloc_group() helper and stores the table group struct
pointer into the pci_dn struct. For release, a iommu_table_free_group()
helper is added.

This moves iommu_table struct allocation from SR-IOV code to
the generic DMA initialization code in pnv_pci_ioda_setup_dma_pe and
pnv_pci_ioda2_setup_dma_pe as this is where DMA is actually initialized.
This change is here because those lines had to be changed anyway.

This should cause no behavioural change.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
[aw: for the vfio related changes]
Acked-by: Alex Williamson <alex.williamson@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

diff --git a/arch/powerpc/include/asm/iommu.h b/arch/powerpc/include/asm/iommu.h
index e2a45c37dba8829f5896716c8009a374aa70a4ae..5a7267f47bdb1c8bedfee89de9a8a74622cdc0f4 100644 (file)
--- a/arch/powerpc/include/asm/iommu.h
+++ b/arch/powerpc/include/asm/iommu.h
@@ -91,14 +91,9 @@ struct iommu_table {
        struct iommu_pool pools[IOMMU_NR_POOLS];
        unsigned long *it_map;       /* A simple allocation bitmap for now */
        unsigned long  it_page_shift;/* table iommu page size */
-#ifdef CONFIG_IOMMU_API
-       struct iommu_group *it_group;
-#endif
+       struct iommu_table_group *it_table_group;
        struct iommu_table_ops *it_ops;
        void (*set_bypass)(struct iommu_table *tbl, bool enable);
-#ifdef CONFIG_PPC_POWERNV
-       void           *data;
-#endif
 };
 
 /* Pure 2^n version of get_order */
@@ -129,14 +124,22 @@ extern void iommu_free_table(struct iommu_table *tbl, const char *node_name);
  */
 extern struct iommu_table *iommu_init_table(struct iommu_table * tbl,
                                            int nid);
+#define IOMMU_TABLE_GROUP_MAX_TABLES   1
+
+struct iommu_table_group {
+       struct iommu_group *group;
+       struct iommu_table *tables[IOMMU_TABLE_GROUP_MAX_TABLES];
+};
+
 #ifdef CONFIG_IOMMU_API
-extern void iommu_register_group(struct iommu_table *tbl,
+
+extern void iommu_register_group(struct iommu_table_group *table_group,
                                 int pci_domain_number, unsigned long pe_num);
 extern int iommu_add_device(struct device *dev);
 extern void iommu_del_device(struct device *dev);
 extern int __init tce_iommu_bus_notifier_init(void);
 #else
-static inline void iommu_register_group(struct iommu_table *tbl,
+static inline void iommu_register_group(struct iommu_table_group *table_group,
                                        int pci_domain_number,
                                        unsigned long pe_num)
 {

diff --git a/arch/powerpc/include/asm/pci-bridge.h b/arch/powerpc/include/asm/pci-bridge.h
index b76cd5682a8c3369f2477195068f550679351cf7..712add5904454362ff145aa9391ffd8674dfe604 100644 (file)
--- a/arch/powerpc/include/asm/pci-bridge.h
+++ b/arch/powerpc/include/asm/pci-bridge.h
@@ -199,7 +199,7 @@ struct pci_dn {
 
        struct  pci_dn *parent;
        struct  pci_controller *phb;    /* for pci devices */
-       struct  iommu_table *iommu_table;       /* for phb's or bridges */
+       struct  iommu_table_group *table_group; /* for phb's or bridges */
        struct  device_node *node;      /* back-pointer to the device_node */
 
        int     pci_ext_config_space;   /* for pci devices */

diff --git a/arch/powerpc/kernel/iommu.c b/arch/powerpc/kernel/iommu.c
index c0e67e945c9509e6f42c2c253f71b9e8020d0fe7..719f0485ec796e02d4de9964a39bb872e641d67c 100644 (file)
--- a/arch/powerpc/kernel/iommu.c
+++ b/arch/powerpc/kernel/iommu.c
@@ -889,11 +889,12 @@ EXPORT_SYMBOL_GPL(iommu_direction_to_tce_perm);
  */
 static void group_release(void *iommu_data)
 {
-       struct iommu_table *tbl = iommu_data;
-       tbl->it_group = NULL;
+       struct iommu_table_group *table_group = iommu_data;
+
+       table_group->group = NULL;
 }
 
-void iommu_register_group(struct iommu_table *tbl,
+void iommu_register_group(struct iommu_table_group *table_group,
                int pci_domain_number, unsigned long pe_num)
 {
        struct iommu_group *grp;
@@ -905,8 +906,8 @@ void iommu_register_group(struct iommu_table *tbl,
                                PTR_ERR(grp));
                return;
        }
-       tbl->it_group = grp;
-       iommu_group_set_iommudata(grp, tbl, group_release);
+       table_group->group = grp;
+       iommu_group_set_iommudata(grp, table_group, group_release);
        name = kasprintf(GFP_KERNEL, "domain%d-pe%lx",
                        pci_domain_number, pe_num);
        if (!name)
@@ -1094,7 +1095,7 @@ int iommu_add_device(struct device *dev)
        }
 
        tbl = get_iommu_table_base(dev);
-       if (!tbl || !tbl->it_group) {
+       if (!tbl || !tbl->it_table_group || !tbl->it_table_group->group) {
                pr_debug("%s: Skipping device %s with no tbl\n",
                         __func__, dev_name(dev));
                return 0;
@@ -1102,7 +1103,7 @@ int iommu_add_device(struct device *dev)
 
        pr_debug("%s: Adding %s to iommu group %d\n",
                 __func__, dev_name(dev),
-                iommu_group_id(tbl->it_group));
+                iommu_group_id(tbl->it_table_group->group));
 
        if (PAGE_SIZE < IOMMU_PAGE_SIZE(tbl)) {
                pr_err("%s: Invalid IOMMU page size %lx (%lx) on %s\n",
@@ -1111,7 +1112,7 @@ int iommu_add_device(struct device *dev)
                return -EINVAL;
        }
 
-       return iommu_group_add_device(tbl->it_group, dev);
+       return iommu_group_add_device(tbl->it_table_group->group, dev);
 }
 EXPORT_SYMBOL_GPL(iommu_add_device);
 

diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c
index f710729a4a35f8ac27cb9cc1e76f0cb425d298bf..279dadf43d5af09dbeaa8ced23e300027155becd 100644 (file)
--- a/arch/powerpc/platforms/powernv/pci-ioda.c
+++ b/arch/powerpc/platforms/powernv/pci-ioda.c
@@ -1087,10 +1087,6 @@ static void pnv_ioda_setup_bus_PE(struct pci_bus *bus, int all)
                return;
        }
 
-       pe->tce32_table = kzalloc_node(sizeof(struct iommu_table),
-                       GFP_KERNEL, hose->node);
-       pe->tce32_table->data = pe;
-
        /* Associate it with all child devices */
        pnv_ioda_setup_same_PE(bus, pe);
 
@@ -1292,11 +1288,12 @@ static void pnv_pci_ioda2_release_dma_pe(struct pci_dev *dev, struct pnv_ioda_pe
        struct iommu_table    *tbl;
        unsigned long         addr;
        int64_t               rc;
+       struct iommu_table_group *table_group;
 
        bus = dev->bus;
        hose = pci_bus_to_host(bus);
        phb = hose->private_data;
-       tbl = pe->tce32_table;
+       tbl = pe->table_group.tables[0];
        addr = tbl->it_base;
 
        opal_pci_map_pe_dma_window(phb->opal_id, pe->pe_number,
@@ -1311,13 +1308,14 @@ static void pnv_pci_ioda2_release_dma_pe(struct pci_dev *dev, struct pnv_ioda_pe
        if (rc)
                pe_warn(pe, "OPAL error %ld release DMA window\n", rc);
 
-       if (tbl->it_group) {
-               iommu_group_put(tbl->it_group);
-               BUG_ON(tbl->it_group);
+       table_group = tbl->it_table_group;
+       if (table_group->group) {
+               iommu_group_put(table_group->group);
+               BUG_ON(table_group->group);
        }
        iommu_free_table(tbl, of_node_full_name(dev->dev.of_node));
        free_pages(addr, get_order(TCE32_TABLE_SIZE));
-       pe->tce32_table = NULL;
+       pe->table_group.tables[0] = NULL;
 }
 
 static void pnv_ioda_release_vf_PE(struct pci_dev *pdev, u16 num_vfs)
@@ -1465,10 +1463,6 @@ static void pnv_ioda_setup_vf_PE(struct pci_dev *pdev, u16 num_vfs)
                        continue;
                }
 
-               pe->tce32_table = kzalloc_node(sizeof(struct iommu_table),
-                               GFP_KERNEL, hose->node);
-               pe->tce32_table->data = pe;
-
                /* Put PE to the list */
                mutex_lock(&phb->ioda.pe_list_mutex);
                list_add_tail(&pe->list, &phb->ioda.pe_list);
@@ -1603,7 +1597,7 @@ static void pnv_pci_ioda_dma_dev_setup(struct pnv_phb *phb, struct pci_dev *pdev
 
        pe = &phb->ioda.pe_array[pdn->pe_number];
        WARN_ON(get_dma_ops(&pdev->dev) != &dma_iommu_ops);
-       set_iommu_table_base(&pdev->dev, pe->tce32_table);
+       set_iommu_table_base(&pdev->dev, pe->table_group.tables[0]);
        /*
         * Note: iommu_add_device() will fail here as
         * for physical PE: the device is already added by now;
@@ -1637,7 +1631,7 @@ static int pnv_pci_ioda_dma_set_mask(struct pci_dev *pdev, u64 dma_mask)
        } else {
                dev_info(&pdev->dev, "Using 32-bit DMA via iommu\n");
                set_dma_ops(&pdev->dev, &dma_iommu_ops);
-               set_iommu_table_base(&pdev->dev, pe->tce32_table);
+               set_iommu_table_base(&pdev->dev, pe->table_group.tables[0]);
        }
        *pdev->dev.dma_mask = dma_mask;
        return 0;
@@ -1671,7 +1665,7 @@ static void pnv_ioda_setup_bus_dma(struct pnv_ioda_pe *pe,
        struct pci_dev *dev;
 
        list_for_each_entry(dev, &bus->devices, bus_list) {
-               set_iommu_table_base(&dev->dev, pe->tce32_table);
+               set_iommu_table_base(&dev->dev, pe->table_group.tables[0]);
                iommu_add_device(&dev->dev);
 
                if (dev->subordinate)
@@ -1682,7 +1676,8 @@ static void pnv_ioda_setup_bus_dma(struct pnv_ioda_pe *pe,
 static void pnv_pci_ioda1_tce_invalidate(struct iommu_table *tbl,
                unsigned long index, unsigned long npages, bool rm)
 {
-       struct pnv_ioda_pe *pe = tbl->data;
+       struct pnv_ioda_pe *pe = container_of(tbl->it_table_group,
+                       struct pnv_ioda_pe, table_group);
        __be64 __iomem *invalidate = rm ?
                (__be64 __iomem *)pe->tce_inval_reg_phys :
                (__be64 __iomem *)tbl->it_index;
@@ -1759,7 +1754,8 @@ static struct iommu_table_ops pnv_ioda1_iommu_ops = {
 static void pnv_pci_ioda2_tce_invalidate(struct iommu_table *tbl,
                unsigned long index, unsigned long npages, bool rm)
 {
-       struct pnv_ioda_pe *pe = tbl->data;
+       struct pnv_ioda_pe *pe = container_of(tbl->it_table_group,
+                       struct pnv_ioda_pe, table_group);
        unsigned long start, end, inc;
        __be64 __iomem *invalidate = rm ?
                (__be64 __iomem *)pe->tce_inval_reg_phys :
@@ -1835,8 +1831,12 @@ static void pnv_pci_ioda_setup_dma_pe(struct pnv_phb *phb,
        if (WARN_ON(pe->tce32_seg >= 0))
                return;
 
-       tbl = pe->tce32_table;
-       iommu_register_group(tbl, phb->hose->global_number, pe->pe_number);
+       tbl = kzalloc_node(sizeof(struct iommu_table), GFP_KERNEL,
+                       phb->hose->node);
+       tbl->it_table_group = &pe->table_group;
+       pe->table_group.tables[0] = tbl;
+       iommu_register_group(&pe->table_group, phb->hose->global_number,
+                       pe->pe_number);
 
        /* Grab a 32-bit TCE table */
        pe->tce32_seg = base;
@@ -1915,7 +1915,8 @@ static void pnv_pci_ioda_setup_dma_pe(struct pnv_phb *phb,
 
 static void pnv_pci_ioda2_set_bypass(struct iommu_table *tbl, bool enable)
 {
-       struct pnv_ioda_pe *pe = tbl->data;
+       struct pnv_ioda_pe *pe = container_of(tbl->it_table_group,
+                       struct pnv_ioda_pe, table_group);
        uint16_t window_id = (pe->pe_number << 1 ) + 1;
        int64_t rc;
 
@@ -1949,10 +1950,10 @@ static void pnv_pci_ioda2_setup_bypass_pe(struct pnv_phb *phb,
        pe->tce_bypass_base = 1ull << 59;
 
        /* Install set_bypass callback for VFIO */
-       pe->tce32_table->set_bypass = pnv_pci_ioda2_set_bypass;
+       pe->table_group.tables[0]->set_bypass = pnv_pci_ioda2_set_bypass;
 
        /* Enable bypass by default */
-       pnv_pci_ioda2_set_bypass(pe->tce32_table, true);
+       pnv_pci_ioda2_set_bypass(pe->table_group.tables[0], true);
 }
 
 static void pnv_pci_ioda2_setup_dma_pe(struct pnv_phb *phb,
@@ -1969,8 +1970,12 @@ static void pnv_pci_ioda2_setup_dma_pe(struct pnv_phb *phb,
        if (WARN_ON(pe->tce32_seg >= 0))
                return;
 
-       tbl = pe->tce32_table;
-       iommu_register_group(tbl, phb->hose->global_number, pe->pe_number);
+       tbl = kzalloc_node(sizeof(struct iommu_table), GFP_KERNEL,
+                       phb->hose->node);
+       tbl->it_table_group = &pe->table_group;
+       pe->table_group.tables[0] = tbl;
+       iommu_register_group(&pe->table_group, phb->hose->global_number,
+                       pe->pe_number);
 
        /* The PE will reserve all possible 32-bits space */
        pe->tce32_seg = 0;

diff --git a/arch/powerpc/platforms/powernv/pci-p5ioc2.c b/arch/powerpc/platforms/powernv/pci-p5ioc2.c
index 5a387a9132ff0770aa85ae18d919e110f5fe7324..6e00104093d664827a2e250b390ce71b968fbc04 100644 (file)
--- a/arch/powerpc/platforms/powernv/pci-p5ioc2.c
+++ b/arch/powerpc/platforms/powernv/pci-p5ioc2.c
@@ -92,14 +92,16 @@ static struct iommu_table_ops pnv_p5ioc2_iommu_ops = {
 static void pnv_pci_p5ioc2_dma_dev_setup(struct pnv_phb *phb,
                                         struct pci_dev *pdev)
 {
-       if (phb->p5ioc2.iommu_table.it_map == NULL) {
-               phb->p5ioc2.iommu_table.it_ops = &pnv_p5ioc2_iommu_ops;
-               iommu_init_table(&phb->p5ioc2.iommu_table, phb->hose->node);
-               iommu_register_group(&phb->p5ioc2.iommu_table,
+       struct iommu_table *tbl = phb->p5ioc2.table_group.tables[0];
+
+       if (!tbl->it_map) {
+               tbl->it_ops = &pnv_p5ioc2_iommu_ops;
+               iommu_init_table(tbl, phb->hose->node);
+               iommu_register_group(&phb->p5ioc2.table_group,
                                pci_domain_nr(phb->hose->bus), phb->opal_id);
        }
 
-       set_iommu_table_base(&pdev->dev, &phb->p5ioc2.iommu_table);
+       set_iommu_table_base(&pdev->dev, tbl);
        iommu_add_device(&pdev->dev);
 }
 
@@ -188,6 +190,12 @@ static void __init pnv_pci_init_p5ioc2_phb(struct device_node *np, u64 hub_id,
        pnv_pci_setup_iommu_table(&phb->p5ioc2.iommu_table,
                                  tce_mem, tce_size, 0,
                                  IOMMU_PAGE_SHIFT_4K);
+       /*
+        * We do not allocate iommu_table as we do not support
+        * hotplug or SRIOV on P5IOC2 and therefore iommu_free_table()
+        * should not be called for phb->p5ioc2.table_group.tables[0] ever.
+        */
+       phb->p5ioc2.table_group.tables[0] = &phb->p5ioc2.iommu_table;
 }
 
 void __init pnv_pci_init_p5ioc2_hub(struct device_node *np)

diff --git a/arch/powerpc/platforms/powernv/pci.h b/arch/powerpc/platforms/powernv/pci.h
index 45a756007ec3653c6bfdabbe6fa6880070588d33..d8ba34d7af1bc5120b7d8dfb2e2ceeaa2c539642 100644 (file)
--- a/arch/powerpc/platforms/powernv/pci.h
+++ b/arch/powerpc/platforms/powernv/pci.h
@@ -57,7 +57,7 @@ struct pnv_ioda_pe {
        /* "Base" iommu table, ie, 4K TCEs, 32-bit DMA */
        int                     tce32_seg;
        int                     tce32_segcount;
-       struct iommu_table      *tce32_table;
+       struct iommu_table_group table_group;
        phys_addr_t             tce_inval_reg_phys;
 
        /* 64-bit TCE bypass region */
@@ -120,6 +120,7 @@ struct pnv_phb {
        union {
                struct {
                        struct iommu_table iommu_table;
+                       struct iommu_table_group table_group;
                } p5ioc2;
 
                struct {

diff --git a/arch/powerpc/platforms/pseries/iommu.c b/arch/powerpc/platforms/pseries/iommu.c
index 33f3a855bfd9cbe8a9027edb7dcd59e78e41390c..307d704ffaa34c0ce6ff7eb6470efb7b47a2e0e4 100644 (file)
--- a/arch/powerpc/platforms/pseries/iommu.c
+++ b/arch/powerpc/platforms/pseries/iommu.c
@@ -52,16 +52,51 @@
 
 #include "pseries.h"
 
-static void iommu_pseries_free_table(struct iommu_table *tbl,
+static struct iommu_table_group *iommu_pseries_alloc_group(int node)
+{
+       struct iommu_table_group *table_group = NULL;
+       struct iommu_table *tbl = NULL;
+
+       table_group = kzalloc_node(sizeof(struct iommu_table_group), GFP_KERNEL,
+                          node);
+       if (!table_group)
+               goto fail_exit;
+
+       tbl = kzalloc_node(sizeof(struct iommu_table), GFP_KERNEL, node);
+       if (!tbl)
+               goto fail_exit;
+
+       tbl->it_table_group = table_group;
+       table_group->tables[0] = tbl;
+
+       return table_group;
+
+fail_exit:
+       kfree(table_group);
+       kfree(tbl);
+
+       return NULL;
+}
+
+static void iommu_pseries_free_group(struct iommu_table_group *table_group,
                const char *node_name)
 {
+       struct iommu_table *tbl;
+
+       if (!table_group)
+               return;
+
 #ifdef CONFIG_IOMMU_API
-       if (tbl->it_group) {
-               iommu_group_put(tbl->it_group);
-               BUG_ON(tbl->it_group);
+       if (table_group->group) {
+               iommu_group_put(table_group->group);
+               BUG_ON(table_group->group);
        }
 #endif
+
+       tbl = table_group->tables[0];
        iommu_free_table(tbl, node_name);
+
+       kfree(table_group);
 }
 
 static void tce_invalidate_pSeries_sw(struct iommu_table *tbl,
@@ -631,13 +666,13 @@ static void pci_dma_bus_setup_pSeries(struct pci_bus *bus)
        pci->phb->dma_window_size = 0x8000000ul;
        pci->phb->dma_window_base_cur = 0x8000000ul;
 
-       tbl = kzalloc_node(sizeof(struct iommu_table), GFP_KERNEL,
-                          pci->phb->node);
+       pci->table_group = iommu_pseries_alloc_group(pci->phb->node);
+       tbl = pci->table_group->tables[0];
 
        iommu_table_setparms(pci->phb, dn, tbl);
        tbl->it_ops = &iommu_table_pseries_ops;
-       pci->iommu_table = iommu_init_table(tbl, pci->phb->node);
-       iommu_register_group(tbl, pci_domain_nr(bus), 0);
+       iommu_init_table(tbl, pci->phb->node);
+       iommu_register_group(pci->table_group, pci_domain_nr(bus), 0);
 
        /* Divide the rest (1.75GB) among the children */
        pci->phb->dma_window_size = 0x80000000ul;
@@ -680,16 +715,17 @@ static void pci_dma_bus_setup_pSeriesLP(struct pci_bus *bus)
        ppci = PCI_DN(pdn);
 
        pr_debug("  parent is %s, iommu_table: 0x%p\n",
-                pdn->full_name, ppci->iommu_table);
+                pdn->full_name, ppci->table_group);
 
-       if (!ppci->iommu_table) {
-               tbl = kzalloc_node(sizeof(struct iommu_table), GFP_KERNEL,
-                                  ppci->phb->node);
+       if (!ppci->table_group) {
+               ppci->table_group = iommu_pseries_alloc_group(ppci->phb->node);
+               tbl = ppci->table_group->tables[0];
                iommu_table_setparms_lpar(ppci->phb, pdn, tbl, dma_window);
                tbl->it_ops = &iommu_table_lpar_multi_ops;
-               ppci->iommu_table = iommu_init_table(tbl, ppci->phb->node);
-               iommu_register_group(tbl, pci_domain_nr(bus), 0);
-               pr_debug("  created table: %p\n", ppci->iommu_table);
+               iommu_init_table(tbl, ppci->phb->node);
+               iommu_register_group(ppci->table_group,
+                               pci_domain_nr(bus), 0);
+               pr_debug("  created table: %p\n", ppci->table_group);
        }
 }
 
@@ -711,12 +747,13 @@ static void pci_dma_dev_setup_pSeries(struct pci_dev *dev)
                struct pci_controller *phb = PCI_DN(dn)->phb;
 
                pr_debug(" --> first child, no bridge. Allocating iommu table.\n");
-               tbl = kzalloc_node(sizeof(struct iommu_table), GFP_KERNEL,
-                                  phb->node);
+               PCI_DN(dn)->table_group = iommu_pseries_alloc_group(phb->node);
+               tbl = PCI_DN(dn)->table_group->tables[0];
                iommu_table_setparms(phb, dn, tbl);
                tbl->it_ops = &iommu_table_pseries_ops;
-               PCI_DN(dn)->iommu_table = iommu_init_table(tbl, phb->node);
-               iommu_register_group(tbl, pci_domain_nr(phb->bus), 0);
+               iommu_init_table(tbl, phb->node);
+               iommu_register_group(PCI_DN(dn)->table_group,
+                               pci_domain_nr(phb->bus), 0);
                set_iommu_table_base(&dev->dev, tbl);
                iommu_add_device(&dev->dev);
                return;
@@ -726,11 +763,12 @@ static void pci_dma_dev_setup_pSeries(struct pci_dev *dev)
         * an already allocated iommu table is found and use that.
         */
 
-       while (dn && PCI_DN(dn) && PCI_DN(dn)->iommu_table == NULL)
+       while (dn && PCI_DN(dn) && PCI_DN(dn)->table_group == NULL)
                dn = dn->parent;
 
        if (dn && PCI_DN(dn)) {
-               set_iommu_table_base(&dev->dev, PCI_DN(dn)->iommu_table);
+               set_iommu_table_base(&dev->dev,
+                               PCI_DN(dn)->table_group->tables[0]);
                iommu_add_device(&dev->dev);
        } else
                printk(KERN_WARNING "iommu: Device %s has no iommu table\n",
@@ -1117,7 +1155,7 @@ static void pci_dma_dev_setup_pSeriesLP(struct pci_dev *dev)
        dn = pci_device_to_OF_node(dev);
        pr_debug("  node is %s\n", dn->full_name);
 
-       for (pdn = dn; pdn && PCI_DN(pdn) && !PCI_DN(pdn)->iommu_table;
+       for (pdn = dn; pdn && PCI_DN(pdn) && !PCI_DN(pdn)->table_group;
             pdn = pdn->parent) {
                dma_window = of_get_property(pdn, "ibm,dma-window", NULL);
                if (dma_window)
@@ -1133,19 +1171,20 @@ static void pci_dma_dev_setup_pSeriesLP(struct pci_dev *dev)
        pr_debug("  parent is %s\n", pdn->full_name);
 
        pci = PCI_DN(pdn);
-       if (!pci->iommu_table) {
-               tbl = kzalloc_node(sizeof(struct iommu_table), GFP_KERNEL,
-                                  pci->phb->node);
+       if (!pci->table_group) {
+               pci->table_group = iommu_pseries_alloc_group(pci->phb->node);
+               tbl = pci->table_group->tables[0];
                iommu_table_setparms_lpar(pci->phb, pdn, tbl, dma_window);
                tbl->it_ops = &iommu_table_lpar_multi_ops;
-               pci->iommu_table = iommu_init_table(tbl, pci->phb->node);
-               iommu_register_group(tbl, pci_domain_nr(pci->phb->bus), 0);
-               pr_debug("  created table: %p\n", pci->iommu_table);
+               iommu_init_table(tbl, pci->phb->node);
+               iommu_register_group(pci->table_group,
+                               pci_domain_nr(pci->phb->bus), 0);
+               pr_debug("  created table: %p\n", pci->table_group);
        } else {
-               pr_debug("  found DMA window, table: %p\n", pci->iommu_table);
+               pr_debug("  found DMA window, table: %p\n", pci->table_group);
        }
 
-       set_iommu_table_base(&dev->dev, pci->iommu_table);
+       set_iommu_table_base(&dev->dev, pci->table_group->tables[0]);
        iommu_add_device(&dev->dev);
 }
 
@@ -1176,7 +1215,7 @@ static int dma_set_mask_pSeriesLP(struct device *dev, u64 dma_mask)
                 * search upwards in the tree until we either hit a dma-window
                 * property, OR find a parent with a table already allocated.
                 */
-               for (pdn = dn; pdn && PCI_DN(pdn) && !PCI_DN(pdn)->iommu_table;
+               for (pdn = dn; pdn && PCI_DN(pdn) && !PCI_DN(pdn)->table_group;
                                pdn = pdn->parent) {
                        dma_window = of_get_property(pdn, "ibm,dma-window", NULL);
                        if (dma_window)
@@ -1220,7 +1259,7 @@ static u64 dma_get_required_mask_pSeriesLP(struct device *dev)
                dn = pci_device_to_OF_node(pdev);
 
                /* search upwards for ibm,dma-window */
-               for (; dn && PCI_DN(dn) && !PCI_DN(dn)->iommu_table;
+               for (; dn && PCI_DN(dn) && !PCI_DN(dn)->table_group;
                                dn = dn->parent)
                        if (of_get_property(dn, "ibm,dma-window", NULL))
                                break;
@@ -1300,8 +1339,8 @@ static int iommu_reconfig_notifier(struct notifier_block *nb, unsigned long acti
                 * the device node.
                 */
                remove_ddw(np, false);
-               if (pci && pci->iommu_table)
-                       iommu_pseries_free_table(pci->iommu_table,
+               if (pci && pci->table_group)
+                       iommu_pseries_free_group(pci->table_group,
                                        np->full_name);
 
                spin_lock(&direct_window_list_lock);

diff --git a/drivers/vfio/vfio_iommu_spapr_tce.c b/drivers/vfio/vfio_iommu_spapr_tce.c
index e65bc73cc8a8b8c421f73f5cde804f34af2182e7..c4bc345d64d76b8f0e1a746385091185d34ef5c9 100644 (file)
--- a/drivers/vfio/vfio_iommu_spapr_tce.c
+++ b/drivers/vfio/vfio_iommu_spapr_tce.c
@@ -190,10 +190,11 @@ static void tce_iommu_release(void *iommu_data)
 {
        struct tce_container *container = iommu_data;
 
-       WARN_ON(container->tbl && !container->tbl->it_group);
+       WARN_ON(container->tbl && !container->tbl->it_table_group->group);
 
-       if (container->tbl && container->tbl->it_group)
-               tce_iommu_detach_group(iommu_data, container->tbl->it_group);
+       if (container->tbl && container->tbl->it_table_group->group)
+               tce_iommu_detach_group(iommu_data,
+                               container->tbl->it_table_group->group);
 
        tce_iommu_disable(container);
        mutex_destroy(&container->lock);
@@ -345,7 +346,7 @@ static long tce_iommu_ioctl(void *iommu_data,
                if (!tbl)
                        return -ENXIO;
 
-               BUG_ON(!tbl->it_group);
+               BUG_ON(!tbl->it_table_group->group);
 
                minsz = offsetofend(struct vfio_iommu_type1_dma_map, size);
 
@@ -433,11 +434,12 @@ static long tce_iommu_ioctl(void *iommu_data,
                mutex_unlock(&container->lock);
                return 0;
        case VFIO_EEH_PE_OP:
-               if (!container->tbl || !container->tbl->it_group)
+               if (!container->tbl || !container->tbl->it_table_group->group)
                        return -ENODEV;
 
-               return vfio_spapr_iommu_eeh_ioctl(container->tbl->it_group,
-                                                 cmd, arg);
+               return vfio_spapr_iommu_eeh_ioctl(
+                               container->tbl->it_table_group->group,
+                               cmd, arg);
        }
 
        return -ENOTTY;
@@ -457,7 +459,8 @@ static int tce_iommu_attach_group(void *iommu_data,
                        iommu_group_id(iommu_group), iommu_group); */
        if (container->tbl) {
                pr_warn("tce_vfio: Only one group per IOMMU container is allowed, existing id=%d, attaching id=%d\n",
-                               iommu_group_id(container->tbl->it_group),
+                               iommu_group_id(container->tbl->
+                                               it_table_group->group),
                                iommu_group_id(iommu_group));
                ret = -EBUSY;
                goto unlock_exit;
@@ -491,13 +494,13 @@ static void tce_iommu_detach_group(void *iommu_data,
        if (tbl != container->tbl) {
                pr_warn("tce_vfio: detaching group #%u, expected group is #%u\n",
                                iommu_group_id(iommu_group),
-                               iommu_group_id(tbl->it_group));
+                               iommu_group_id(tbl->it_table_group->group));
                goto unlock_exit;
        }
 
        if (container->enabled) {
                pr_warn("tce_vfio: detaching group #%u from enabled container, forcing disable\n",
-                               iommu_group_id(tbl->it_group));
+                               iommu_group_id(tbl->it_table_group->group));
                tce_iommu_disable(container);
        }