Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1946263AbbDYMUK (ORCPT ); Sat, 25 Apr 2015 08:20:10 -0400 Received: from e23smtp05.au.ibm.com ([202.81.31.147]:35628 "EHLO e23smtp05.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759239AbbDYMQ0 (ORCPT ); Sat, 25 Apr 2015 08:16:26 -0400 From: Alexey Kardashevskiy To: linuxppc-dev@lists.ozlabs.org Cc: Alexey Kardashevskiy , Benjamin Herrenschmidt , Paul Mackerras , Alex Williamson , Gavin Shan , David Gibson , linux-kernel@vger.kernel.org Subject: [PATCH kernel v9 11/32] powerpc/iommu: Move tce_xxx callbacks from ppc_md to iommu_table Date: Sat, 25 Apr 2015 22:14:35 +1000 Message-Id: <1429964096-11524-12-git-send-email-aik@ozlabs.ru> X-Mailer: git-send-email 2.0.0 In-Reply-To: <1429964096-11524-1-git-send-email-aik@ozlabs.ru> References: <1429964096-11524-1-git-send-email-aik@ozlabs.ru> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 15042512-0017-0000-0000-00000124D693 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 25683 Lines: 701 This adds a iommu_table_ops struct and puts pointer to it into the iommu_table struct. This moves tce_build/tce_free/tce_get/tce_flush callbacks from ppc_md to the new struct where they really belong to. This adds the requirement for @it_ops to be initialized before calling iommu_init_table() to make sure that we do not leave any IOMMU table with iommu_table_ops uninitialized. This is not a parameter of iommu_init_table() though as there will be cases when iommu_init_table() will not be called on TCE tables, for example - VFIO. This does s/tce_build/set/, s/tce_free/clear/ and removes "tce_" redundand prefixes. This removes tce_xxx_rm handlers from ppc_md but does not add them to iommu_table_ops as this will be done later if we decide to support TCE hypercalls in real mode. This removes _vm callbacks as only virtual mode is supported by now so this also removes @rm parameter. For pSeries, this always uses tce_buildmulti_pSeriesLP/ tce_buildmulti_pSeriesLP. This changes multi callback to fall back to tce_build_pSeriesLP/tce_free_pSeriesLP if FW_FEATURE_MULTITCE is not present. The reason for this is we still have to support "multitce=off" boot parameter in disable_multitce() and we do not want to walk through all IOMMU tables in the system and replace "multi" callbacks with single ones. For powernv, this defines _ops per PHB type which are P5IOC2/IODA1/IODA2. This makes the callbacks for them public. Later patches will extend callbacks for IODA1/2. No change in behaviour is expected. Signed-off-by: Alexey Kardashevskiy Reviewed-by: David Gibson --- Changes: v9: * pnv_tce_build/pnv_tce_free/pnv_tce_get have been made public and lost "rm" parameters to make following patches simpler (realmode is not supported here anyway) * got rid of _vm versions of callbacks --- arch/powerpc/include/asm/iommu.h | 17 +++++++++++ arch/powerpc/include/asm/machdep.h | 25 --------------- arch/powerpc/kernel/iommu.c | 46 ++++++++++++++-------------- arch/powerpc/kernel/vio.c | 5 +++ arch/powerpc/platforms/cell/iommu.c | 8 +++-- arch/powerpc/platforms/pasemi/iommu.c | 7 +++-- arch/powerpc/platforms/powernv/pci-ioda.c | 14 +++++++++ arch/powerpc/platforms/powernv/pci-p5ioc2.c | 7 +++++ arch/powerpc/platforms/powernv/pci.c | 47 +++++------------------------ arch/powerpc/platforms/powernv/pci.h | 5 +++ arch/powerpc/platforms/pseries/iommu.c | 34 ++++++++++++--------- arch/powerpc/sysdev/dart_iommu.c | 12 +++++--- 12 files changed, 116 insertions(+), 111 deletions(-) diff --git a/arch/powerpc/include/asm/iommu.h b/arch/powerpc/include/asm/iommu.h index 5eb6e76..f0cab49 100644 --- a/arch/powerpc/include/asm/iommu.h +++ b/arch/powerpc/include/asm/iommu.h @@ -44,6 +44,22 @@ extern int iommu_is_off; extern int iommu_force_on; +struct iommu_table_ops { + int (*set)(struct iommu_table *tbl, + long index, long npages, + unsigned long uaddr, + enum dma_data_direction direction, + struct dma_attrs *attrs); + void (*clear)(struct iommu_table *tbl, + long index, long npages); + unsigned long (*get)(struct iommu_table *tbl, long index); + void (*flush)(struct iommu_table *tbl); +}; + +/* These are used by VIO */ +extern struct iommu_table_ops iommu_table_lpar_multi_ops; +extern struct iommu_table_ops iommu_table_pseries_ops; + /* * IOMAP_MAX_ORDER defines the largest contiguous block * of dma space we can get. IOMAP_MAX_ORDER = 13 @@ -78,6 +94,7 @@ struct iommu_table { #ifdef CONFIG_IOMMU_API struct iommu_group *it_group; #endif + struct iommu_table_ops *it_ops; void (*set_bypass)(struct iommu_table *tbl, bool enable); }; diff --git a/arch/powerpc/include/asm/machdep.h b/arch/powerpc/include/asm/machdep.h index ef889943..ab721b4 100644 --- a/arch/powerpc/include/asm/machdep.h +++ b/arch/powerpc/include/asm/machdep.h @@ -65,31 +65,6 @@ struct machdep_calls { * destroyed as well */ void (*hpte_clear_all)(void); - int (*tce_build)(struct iommu_table *tbl, - long index, - long npages, - unsigned long uaddr, - enum dma_data_direction direction, - struct dma_attrs *attrs); - void (*tce_free)(struct iommu_table *tbl, - long index, - long npages); - unsigned long (*tce_get)(struct iommu_table *tbl, - long index); - void (*tce_flush)(struct iommu_table *tbl); - - /* _rm versions are for real mode use only */ - int (*tce_build_rm)(struct iommu_table *tbl, - long index, - long npages, - unsigned long uaddr, - enum dma_data_direction direction, - struct dma_attrs *attrs); - void (*tce_free_rm)(struct iommu_table *tbl, - long index, - long npages); - void (*tce_flush_rm)(struct iommu_table *tbl); - void __iomem * (*ioremap)(phys_addr_t addr, unsigned long size, unsigned long flags, void *caller); void (*iounmap)(volatile void __iomem *token); diff --git a/arch/powerpc/kernel/iommu.c b/arch/powerpc/kernel/iommu.c index e0e94c7..e289f91 100644 --- a/arch/powerpc/kernel/iommu.c +++ b/arch/powerpc/kernel/iommu.c @@ -322,11 +322,11 @@ static dma_addr_t iommu_alloc(struct device *dev, struct iommu_table *tbl, ret = entry << tbl->it_page_shift; /* Set the return dma address */ /* Put the TCEs in the HW table */ - build_fail = ppc_md.tce_build(tbl, entry, npages, + build_fail = tbl->it_ops->set(tbl, entry, npages, (unsigned long)page & IOMMU_PAGE_MASK(tbl), direction, attrs); - /* ppc_md.tce_build() only returns non-zero for transient errors. + /* tbl->it_ops->set() only returns non-zero for transient errors. * Clean up the table bitmap in this case and return * DMA_ERROR_CODE. For all other errors the functionality is * not altered. @@ -337,8 +337,8 @@ static dma_addr_t iommu_alloc(struct device *dev, struct iommu_table *tbl, } /* Flush/invalidate TLB caches if necessary */ - if (ppc_md.tce_flush) - ppc_md.tce_flush(tbl); + if (tbl->it_ops->flush) + tbl->it_ops->flush(tbl); /* Make sure updates are seen by hardware */ mb(); @@ -408,7 +408,7 @@ static void __iommu_free(struct iommu_table *tbl, dma_addr_t dma_addr, if (!iommu_free_check(tbl, dma_addr, npages)) return; - ppc_md.tce_free(tbl, entry, npages); + tbl->it_ops->clear(tbl, entry, npages); spin_lock_irqsave(&(pool->lock), flags); bitmap_clear(tbl->it_map, free_entry, npages); @@ -424,8 +424,8 @@ static void iommu_free(struct iommu_table *tbl, dma_addr_t dma_addr, * not do an mb() here on purpose, it is not needed on any of * the current platforms. */ - if (ppc_md.tce_flush) - ppc_md.tce_flush(tbl); + if (tbl->it_ops->flush) + tbl->it_ops->flush(tbl); } int ppc_iommu_map_sg(struct device *dev, struct iommu_table *tbl, @@ -495,7 +495,7 @@ int ppc_iommu_map_sg(struct device *dev, struct iommu_table *tbl, npages, entry, dma_addr); /* Insert into HW table */ - build_fail = ppc_md.tce_build(tbl, entry, npages, + build_fail = tbl->it_ops->set(tbl, entry, npages, vaddr & IOMMU_PAGE_MASK(tbl), direction, attrs); if(unlikely(build_fail)) @@ -534,8 +534,8 @@ int ppc_iommu_map_sg(struct device *dev, struct iommu_table *tbl, } /* Flush/invalidate TLB caches if necessary */ - if (ppc_md.tce_flush) - ppc_md.tce_flush(tbl); + if (tbl->it_ops->flush) + tbl->it_ops->flush(tbl); DBG("mapped %d elements:\n", outcount); @@ -600,8 +600,8 @@ void ppc_iommu_unmap_sg(struct iommu_table *tbl, struct scatterlist *sglist, * do not do an mb() here, the affected platforms do not need it * when freeing. */ - if (ppc_md.tce_flush) - ppc_md.tce_flush(tbl); + if (tbl->it_ops->flush) + tbl->it_ops->flush(tbl); } static void iommu_table_clear(struct iommu_table *tbl) @@ -613,17 +613,17 @@ static void iommu_table_clear(struct iommu_table *tbl) */ if (!is_kdump_kernel() || is_fadump_active()) { /* Clear the table in case firmware left allocations in it */ - ppc_md.tce_free(tbl, tbl->it_offset, tbl->it_size); + tbl->it_ops->clear(tbl, tbl->it_offset, tbl->it_size); return; } #ifdef CONFIG_CRASH_DUMP - if (ppc_md.tce_get) { + if (tbl->it_ops->get) { unsigned long index, tceval, tcecount = 0; /* Reserve the existing mappings left by the first kernel. */ for (index = 0; index < tbl->it_size; index++) { - tceval = ppc_md.tce_get(tbl, index + tbl->it_offset); + tceval = tbl->it_ops->get(tbl, index + tbl->it_offset); /* * Freed TCE entry contains 0x7fffffffffffffff on JS20 */ @@ -657,6 +657,8 @@ struct iommu_table *iommu_init_table(struct iommu_table *tbl, int nid) unsigned int i; struct iommu_pool *p; + BUG_ON(!tbl->it_ops); + /* number of bytes needed for the bitmap */ sz = BITS_TO_LONGS(tbl->it_size) * sizeof(unsigned long); @@ -944,8 +946,8 @@ EXPORT_SYMBOL_GPL(iommu_tce_direction); void iommu_flush_tce(struct iommu_table *tbl) { /* Flush/invalidate TLB caches if necessary */ - if (ppc_md.tce_flush) - ppc_md.tce_flush(tbl); + if (tbl->it_ops->flush) + tbl->it_ops->flush(tbl); /* Make sure updates are seen by hardware */ mb(); @@ -956,7 +958,7 @@ int iommu_tce_clear_param_check(struct iommu_table *tbl, unsigned long ioba, unsigned long tce_value, unsigned long npages) { - /* ppc_md.tce_free() does not support any value but 0 */ + /* tbl->it_ops->clear() does not support any value but 0 */ if (tce_value) return -EINVAL; @@ -1004,9 +1006,9 @@ unsigned long iommu_clear_tce(struct iommu_table *tbl, unsigned long entry) spin_lock(&(pool->lock)); - oldtce = ppc_md.tce_get(tbl, entry); + oldtce = tbl->it_ops->get(tbl, entry); if (oldtce & (TCE_PCI_WRITE | TCE_PCI_READ)) - ppc_md.tce_free(tbl, entry, 1); + tbl->it_ops->clear(tbl, entry, 1); else oldtce = 0; @@ -1029,10 +1031,10 @@ int iommu_tce_build(struct iommu_table *tbl, unsigned long entry, spin_lock(&(pool->lock)); - oldtce = ppc_md.tce_get(tbl, entry); + oldtce = tbl->it_ops->get(tbl, entry); /* Add new entry if it is not busy */ if (!(oldtce & (TCE_PCI_WRITE | TCE_PCI_READ))) - ret = ppc_md.tce_build(tbl, entry, 1, hwaddr, direction, NULL); + ret = tbl->it_ops->set(tbl, entry, 1, hwaddr, direction, NULL); spin_unlock(&(pool->lock)); diff --git a/arch/powerpc/kernel/vio.c b/arch/powerpc/kernel/vio.c index 5bfdab9..b41426c 100644 --- a/arch/powerpc/kernel/vio.c +++ b/arch/powerpc/kernel/vio.c @@ -1196,6 +1196,11 @@ static struct iommu_table *vio_build_iommu_table(struct vio_dev *dev) tbl->it_type = TCE_VB; tbl->it_blocksize = 16; + if (firmware_has_feature(FW_FEATURE_LPAR)) + tbl->it_ops = &iommu_table_lpar_multi_ops; + else + tbl->it_ops = &iommu_table_pseries_ops; + return iommu_init_table(tbl, -1); } diff --git a/arch/powerpc/platforms/cell/iommu.c b/arch/powerpc/platforms/cell/iommu.c index 21b5023..14a582b 100644 --- a/arch/powerpc/platforms/cell/iommu.c +++ b/arch/powerpc/platforms/cell/iommu.c @@ -466,6 +466,11 @@ static inline u32 cell_iommu_get_ioid(struct device_node *np) return *ioid; } +static struct iommu_table_ops cell_iommu_ops = { + .set = tce_build_cell, + .clear = tce_free_cell +}; + static struct iommu_window * __init cell_iommu_setup_window(struct cbe_iommu *iommu, struct device_node *np, unsigned long offset, unsigned long size, @@ -492,6 +497,7 @@ cell_iommu_setup_window(struct cbe_iommu *iommu, struct device_node *np, window->table.it_offset = (offset >> window->table.it_page_shift) + pte_offset; window->table.it_size = size >> window->table.it_page_shift; + window->table.it_ops = &cell_iommu_ops; iommu_init_table(&window->table, iommu->nid); @@ -1201,8 +1207,6 @@ static int __init cell_iommu_init(void) /* Setup various callbacks */ cell_pci_controller_ops.dma_dev_setup = cell_pci_dma_dev_setup; ppc_md.dma_get_required_mask = cell_dma_get_required_mask; - ppc_md.tce_build = tce_build_cell; - ppc_md.tce_free = tce_free_cell; if (!iommu_fixed_disabled && cell_iommu_fixed_mapping_init() == 0) goto bail; diff --git a/arch/powerpc/platforms/pasemi/iommu.c b/arch/powerpc/platforms/pasemi/iommu.c index b8f567b..c929644 100644 --- a/arch/powerpc/platforms/pasemi/iommu.c +++ b/arch/powerpc/platforms/pasemi/iommu.c @@ -134,6 +134,10 @@ static void iobmap_free(struct iommu_table *tbl, long index, } } +static struct iommu_table_ops iommu_table_iobmap_ops = { + .set = iobmap_build, + .clear = iobmap_free +}; static void iommu_table_iobmap_setup(void) { @@ -153,6 +157,7 @@ static void iommu_table_iobmap_setup(void) * Should probably be 8 (64 bytes) */ iommu_table_iobmap.it_blocksize = 4; + iommu_table_iobmap.it_ops = &iommu_table_iobmap_ops; iommu_init_table(&iommu_table_iobmap, 0); pr_debug(" <- %s\n", __func__); } @@ -252,8 +257,6 @@ void __init iommu_init_early_pasemi(void) pasemi_pci_controller_ops.dma_dev_setup = pci_dma_dev_setup_pasemi; pasemi_pci_controller_ops.dma_bus_setup = pci_dma_bus_setup_pasemi; - ppc_md.tce_build = iobmap_build; - ppc_md.tce_free = iobmap_free; set_pci_dma_ops(&dma_iommu_ops); } diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c index eff26ed..7a9137a 100644 --- a/arch/powerpc/platforms/powernv/pci-ioda.c +++ b/arch/powerpc/platforms/powernv/pci-ioda.c @@ -1710,6 +1710,12 @@ static void pnv_pci_ioda1_tce_invalidate(struct pnv_ioda_pe *pe, */ } +static struct iommu_table_ops pnv_ioda1_iommu_ops = { + .set = pnv_tce_build, + .clear = pnv_tce_free, + .get = pnv_tce_get, +}; + static void pnv_pci_ioda2_tce_invalidate(struct pnv_ioda_pe *pe, struct iommu_table *tbl, __be64 *startp, __be64 *endp, bool rm) @@ -1755,6 +1761,12 @@ void pnv_pci_ioda_tce_invalidate(struct iommu_table *tbl, pnv_pci_ioda2_tce_invalidate(pe, tbl, startp, endp, rm); } +static struct iommu_table_ops pnv_ioda2_iommu_ops = { + .set = pnv_tce_build, + .clear = pnv_tce_free, + .get = pnv_tce_get, +}; + static void pnv_pci_ioda_setup_dma_pe(struct pnv_phb *phb, struct pnv_ioda_pe *pe, unsigned int base, unsigned int segs) @@ -1828,6 +1840,7 @@ static void pnv_pci_ioda_setup_dma_pe(struct pnv_phb *phb, TCE_PCI_SWINV_FREE | TCE_PCI_SWINV_PAIR); } + tbl->it_ops = &pnv_ioda1_iommu_ops; iommu_init_table(tbl, phb->hose->node); if (pe->flags & PNV_IODA_PE_DEV) { @@ -1968,6 +1981,7 @@ static void pnv_pci_ioda2_setup_dma_pe(struct pnv_phb *phb, 8); tbl->it_type |= (TCE_PCI_SWINV_CREATE | TCE_PCI_SWINV_FREE); } + tbl->it_ops = &pnv_ioda2_iommu_ops; iommu_init_table(tbl, phb->hose->node); if (pe->flags & PNV_IODA_PE_DEV) { diff --git a/arch/powerpc/platforms/powernv/pci-p5ioc2.c b/arch/powerpc/platforms/powernv/pci-p5ioc2.c index 4729ca7..f05057e 100644 --- a/arch/powerpc/platforms/powernv/pci-p5ioc2.c +++ b/arch/powerpc/platforms/powernv/pci-p5ioc2.c @@ -83,10 +83,17 @@ static void pnv_pci_init_p5ioc2_msis(struct pnv_phb *phb) static void pnv_pci_init_p5ioc2_msis(struct pnv_phb *phb) { } #endif /* CONFIG_PCI_MSI */ +static struct iommu_table_ops pnv_p5ioc2_iommu_ops = { + .set = pnv_tce_build, + .clear = pnv_tce_free, + .get = pnv_tce_get, +}; + 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, pci_domain_nr(phb->hose->bus), phb->opal_id); diff --git a/arch/powerpc/platforms/powernv/pci.c b/arch/powerpc/platforms/powernv/pci.c index b7ea245..4c3bbb1 100644 --- a/arch/powerpc/platforms/powernv/pci.c +++ b/arch/powerpc/platforms/powernv/pci.c @@ -572,9 +572,9 @@ struct pci_ops pnv_pci_ops = { .write = pnv_pci_write_config, }; -static int pnv_tce_build(struct iommu_table *tbl, long index, long npages, - unsigned long uaddr, enum dma_data_direction direction, - struct dma_attrs *attrs, bool rm) +int pnv_tce_build(struct iommu_table *tbl, long index, long npages, + unsigned long uaddr, enum dma_data_direction direction, + struct dma_attrs *attrs) { u64 proto_tce = iommu_direction_to_tce_perm(direction); __be64 *tcep, *tces; @@ -592,22 +592,12 @@ static int pnv_tce_build(struct iommu_table *tbl, long index, long npages, * of flags if that becomes the case */ if (tbl->it_type & TCE_PCI_SWINV_CREATE) - pnv_pci_ioda_tce_invalidate(tbl, tces, tcep - 1, rm); + pnv_pci_ioda_tce_invalidate(tbl, tces, tcep - 1, false); return 0; } -static int pnv_tce_build_vm(struct iommu_table *tbl, long index, long npages, - unsigned long uaddr, - enum dma_data_direction direction, - struct dma_attrs *attrs) -{ - return pnv_tce_build(tbl, index, npages, uaddr, direction, attrs, - false); -} - -static void pnv_tce_free(struct iommu_table *tbl, long index, long npages, - bool rm) +void pnv_tce_free(struct iommu_table *tbl, long index, long npages) { __be64 *tcep, *tces; @@ -617,32 +607,14 @@ static void pnv_tce_free(struct iommu_table *tbl, long index, long npages, *(tcep++) = cpu_to_be64(0); if (tbl->it_type & TCE_PCI_SWINV_FREE) - pnv_pci_ioda_tce_invalidate(tbl, tces, tcep - 1, rm); + pnv_pci_ioda_tce_invalidate(tbl, tces, tcep - 1, false); } -static void pnv_tce_free_vm(struct iommu_table *tbl, long index, long npages) -{ - pnv_tce_free(tbl, index, npages, false); -} - -static unsigned long pnv_tce_get(struct iommu_table *tbl, long index) +unsigned long pnv_tce_get(struct iommu_table *tbl, long index) { return ((u64 *)tbl->it_base)[index - tbl->it_offset]; } -static int pnv_tce_build_rm(struct iommu_table *tbl, long index, long npages, - unsigned long uaddr, - enum dma_data_direction direction, - struct dma_attrs *attrs) -{ - return pnv_tce_build(tbl, index, npages, uaddr, direction, attrs, true); -} - -static void pnv_tce_free_rm(struct iommu_table *tbl, long index, long npages) -{ - pnv_tce_free(tbl, index, npages, true); -} - void pnv_pci_setup_iommu_table(struct iommu_table *tbl, void *tce_mem, u64 tce_size, u64 dma_offset, unsigned page_shift) @@ -757,11 +729,6 @@ void __init pnv_pci_init(void) pci_devs_phb_init(); /* Configure IOMMU DMA hooks */ - ppc_md.tce_build = pnv_tce_build_vm; - ppc_md.tce_free = pnv_tce_free_vm; - ppc_md.tce_build_rm = pnv_tce_build_rm; - ppc_md.tce_free_rm = pnv_tce_free_rm; - ppc_md.tce_get = pnv_tce_get; set_pci_dma_ops(&dma_iommu_ops); /* Configure MSIs */ diff --git a/arch/powerpc/platforms/powernv/pci.h b/arch/powerpc/platforms/powernv/pci.h index c954c64..7eb6076 100644 --- a/arch/powerpc/platforms/powernv/pci.h +++ b/arch/powerpc/platforms/powernv/pci.h @@ -200,6 +200,11 @@ struct pnv_phb { }; extern struct pci_ops pnv_pci_ops; +extern int pnv_tce_build(struct iommu_table *tbl, long index, long npages, + unsigned long uaddr, enum dma_data_direction direction, + struct dma_attrs *attrs); +extern void pnv_tce_free(struct iommu_table *tbl, long index, long npages); +extern unsigned long pnv_tce_get(struct iommu_table *tbl, long index); void pnv_pci_dump_phb_diag_data(struct pci_controller *hose, unsigned char *log_buff); diff --git a/arch/powerpc/platforms/pseries/iommu.c b/arch/powerpc/platforms/pseries/iommu.c index 61d5a17..e379acf 100644 --- a/arch/powerpc/platforms/pseries/iommu.c +++ b/arch/powerpc/platforms/pseries/iommu.c @@ -193,7 +193,7 @@ static int tce_buildmulti_pSeriesLP(struct iommu_table *tbl, long tcenum, int ret = 0; unsigned long flags; - if (npages == 1) { + if ((npages == 1) || !firmware_has_feature(FW_FEATURE_MULTITCE)) { return tce_build_pSeriesLP(tbl, tcenum, npages, uaddr, direction, attrs); } @@ -285,6 +285,9 @@ static void tce_freemulti_pSeriesLP(struct iommu_table *tbl, long tcenum, long n { u64 rc; + if (!firmware_has_feature(FW_FEATURE_MULTITCE)) + return tce_free_pSeriesLP(tbl, tcenum, npages); + rc = plpar_tce_stuff((u64)tbl->it_index, (u64)tcenum << 12, 0, npages); if (rc && printk_ratelimit()) { @@ -460,7 +463,6 @@ static int tce_setrange_multi_pSeriesLP_walk(unsigned long start_pfn, return tce_setrange_multi_pSeriesLP(start_pfn, num_pfn, arg); } - #ifdef CONFIG_PCI static void iommu_table_setparms(struct pci_controller *phb, struct device_node *dn, @@ -546,6 +548,12 @@ static void iommu_table_setparms_lpar(struct pci_controller *phb, tbl->it_size = size >> tbl->it_page_shift; } +struct iommu_table_ops iommu_table_pseries_ops = { + .set = tce_build_pSeries, + .clear = tce_free_pSeries, + .get = tce_get_pseries +}; + static void pci_dma_bus_setup_pSeries(struct pci_bus *bus) { struct device_node *dn; @@ -614,6 +622,7 @@ static void pci_dma_bus_setup_pSeries(struct pci_bus *bus) pci->phb->node); 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); @@ -625,6 +634,11 @@ static void pci_dma_bus_setup_pSeries(struct pci_bus *bus) pr_debug("ISA/IDE, window size is 0x%llx\n", pci->phb->dma_window_size); } +struct iommu_table_ops iommu_table_lpar_multi_ops = { + .set = tce_buildmulti_pSeriesLP, + .clear = tce_freemulti_pSeriesLP, + .get = tce_get_pSeriesLP +}; static void pci_dma_bus_setup_pSeriesLP(struct pci_bus *bus) { @@ -659,6 +673,7 @@ static void pci_dma_bus_setup_pSeriesLP(struct pci_bus *bus) tbl = kzalloc_node(sizeof(struct iommu_table), GFP_KERNEL, ppci->phb->node); 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); @@ -686,6 +701,7 @@ static void pci_dma_dev_setup_pSeries(struct pci_dev *dev) tbl = kzalloc_node(sizeof(struct iommu_table), GFP_KERNEL, phb->node); 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); set_iommu_table_base_and_group(&dev->dev, @@ -1108,6 +1124,7 @@ static void pci_dma_dev_setup_pSeriesLP(struct pci_dev *dev) tbl = kzalloc_node(sizeof(struct iommu_table), GFP_KERNEL, pci->phb->node); 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); @@ -1300,22 +1317,11 @@ void iommu_init_early_pSeries(void) return; if (firmware_has_feature(FW_FEATURE_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.tce_get = tce_get_pSeriesLP; pseries_pci_controller_ops.dma_bus_setup = pci_dma_bus_setup_pSeriesLP; pseries_pci_controller_ops.dma_dev_setup = pci_dma_dev_setup_pSeriesLP; ppc_md.dma_set_mask = dma_set_mask_pSeriesLP; ppc_md.dma_get_required_mask = dma_get_required_mask_pSeriesLP; } else { - ppc_md.tce_build = tce_build_pSeries; - ppc_md.tce_free = tce_free_pSeries; - ppc_md.tce_get = tce_get_pseries; pseries_pci_controller_ops.dma_bus_setup = pci_dma_bus_setup_pSeries; pseries_pci_controller_ops.dma_dev_setup = pci_dma_dev_setup_pSeries; } @@ -1333,8 +1339,6 @@ static int __init disable_multitce(char *str) firmware_has_feature(FW_FEATURE_LPAR) && firmware_has_feature(FW_FEATURE_MULTITCE)) { printk(KERN_INFO "Disabling MULTITCE firmware feature\n"); - ppc_md.tce_build = tce_build_pSeriesLP; - ppc_md.tce_free = tce_free_pSeriesLP; powerpc_firmware_features &= ~FW_FEATURE_MULTITCE; } return 1; diff --git a/arch/powerpc/sysdev/dart_iommu.c b/arch/powerpc/sysdev/dart_iommu.c index d00a566..90bcdfe 100644 --- a/arch/powerpc/sysdev/dart_iommu.c +++ b/arch/powerpc/sysdev/dart_iommu.c @@ -286,6 +286,12 @@ static int __init dart_init(struct device_node *dart_node) return 0; } +static struct iommu_table_ops iommu_dart_ops = { + .set = dart_build, + .clear = dart_free, + .flush = dart_flush, +}; + static void iommu_table_dart_setup(void) { iommu_table_dart.it_busno = 0; @@ -298,6 +304,7 @@ static void iommu_table_dart_setup(void) iommu_table_dart.it_base = (unsigned long)dart_vbase; iommu_table_dart.it_index = 0; iommu_table_dart.it_blocksize = 1; + iommu_table_dart.it_ops = &iommu_dart_ops; iommu_init_table(&iommu_table_dart, -1); /* Reserve the last page of the DART to avoid possible prefetch @@ -386,11 +393,6 @@ void __init iommu_init_early_dart(struct pci_controller_ops *controller_ops) if (dart_init(dn) != 0) goto bail; - /* Setup low level TCE operations for the core IOMMU code */ - ppc_md.tce_build = dart_build; - ppc_md.tce_free = dart_free; - ppc_md.tce_flush = dart_flush; - /* Setup bypass if supported */ if (dart_is_u4) ppc_md.dma_set_mask = dart_dma_set_mask; -- 2.0.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/