[PATCH 29/32] powerpc/dma: use the generic direct mapping bypass
From: Christoph Hellwig
Date: Wed Feb 13 2019 - 02:03:01 EST
Now that we've switched all the powerpc nommu and swiotlb methods to
use the generic dma_direct_* calls we can remove these ops vectors
entirely and rely on the common direct mapping bypass that avoids
indirect function calls entirely. This also allows to remove a whole
lot of boilerplate code related to setting up these operations.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Tested-by: Christian Zigotzky <chzigotzky@xxxxxxxxxxx>
---
arch/powerpc/include/asm/dma-mapping.h | 9 ---
arch/powerpc/include/asm/swiotlb.h | 3 -
arch/powerpc/kernel/Makefile | 2 +-
arch/powerpc/kernel/dma-swiotlb.c | 58 -----------------
arch/powerpc/kernel/dma.c | 62 -------------------
arch/powerpc/kernel/pci-common.c | 2 +-
arch/powerpc/kernel/setup-common.c | 1 -
arch/powerpc/mm/dma-noncoherent.c | 6 +-
arch/powerpc/platforms/44x/warp.c | 2 +-
arch/powerpc/platforms/85xx/corenet_generic.c | 4 --
arch/powerpc/platforms/85xx/ge_imp3a.c | 2 -
arch/powerpc/platforms/85xx/mpc8536_ds.c | 2 -
arch/powerpc/platforms/85xx/mpc85xx_ds.c | 4 --
arch/powerpc/platforms/85xx/mpc85xx_mds.c | 4 --
arch/powerpc/platforms/85xx/p1010rdb.c | 1 -
arch/powerpc/platforms/85xx/p1022_ds.c | 2 -
arch/powerpc/platforms/85xx/p1022_rdk.c | 2 -
arch/powerpc/platforms/86xx/mpc86xx_hpcn.c | 1 -
arch/powerpc/platforms/cell/iommu.c | 3 -
arch/powerpc/platforms/pasemi/iommu.c | 2 +-
arch/powerpc/platforms/pasemi/setup.c | 51 ---------------
arch/powerpc/platforms/powernv/npu-dma.c | 2 +-
arch/powerpc/platforms/pseries/vio.c | 7 +++
arch/powerpc/sysdev/fsl_pci.c | 5 +-
drivers/misc/cxl/vphb.c | 1 -
25 files changed, 16 insertions(+), 222 deletions(-)
delete mode 100644 arch/powerpc/kernel/dma.c
diff --git a/arch/powerpc/include/asm/dma-mapping.h b/arch/powerpc/include/asm/dma-mapping.h
index 4de9d4ee23c1..93e57e28be28 100644
--- a/arch/powerpc/include/asm/dma-mapping.h
+++ b/arch/powerpc/include/asm/dma-mapping.h
@@ -18,14 +18,6 @@
#include <asm/io.h>
#include <asm/swiotlb.h>
-/* Some dma direct funcs must be visible for use in other dma_ops */
-extern void *__dma_nommu_alloc_coherent(struct device *dev, size_t size,
- dma_addr_t *dma_handle, gfp_t flag,
- unsigned long attrs);
-extern void __dma_nommu_free_coherent(struct device *dev, size_t size,
- void *vaddr, dma_addr_t dma_handle,
- unsigned long attrs);
-
static inline unsigned long device_to_mask(struct device *dev)
{
if (dev->dma_mask && *dev->dma_mask)
@@ -40,7 +32,6 @@ static inline unsigned long device_to_mask(struct device *dev)
#ifdef CONFIG_PPC64
extern const struct dma_map_ops dma_iommu_ops;
#endif
-extern const struct dma_map_ops dma_nommu_ops;
static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
{
diff --git a/arch/powerpc/include/asm/swiotlb.h b/arch/powerpc/include/asm/swiotlb.h
index 26a0f12b835b..b7d082c0ec25 100644
--- a/arch/powerpc/include/asm/swiotlb.h
+++ b/arch/powerpc/include/asm/swiotlb.h
@@ -13,10 +13,7 @@
#include <linux/swiotlb.h>
-extern const struct dma_map_ops powerpc_swiotlb_dma_ops;
-
extern unsigned int ppc_swiotlb_enable;
-int __init swiotlb_setup_bus_notifier(void);
#ifdef CONFIG_SWIOTLB
void swiotlb_detect_4g(void);
diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index 9bb12cd642ef..8809e287b80d 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -36,7 +36,7 @@ obj-y := cputable.o ptrace.o syscalls.o \
process.o systbl.o idle.o \
signal.o sysfs.o cacheinfo.o time.o \
prom.o traps.o setup-common.o \
- udbg.o misc.o io.o dma.o misc_$(BITS).o \
+ udbg.o misc.o io.o misc_$(BITS).o \
of_platform.o prom_parse.o
obj-$(CONFIG_PPC64) += setup_64.o sys_ppc32.o \
signal_64.o ptrace32.o \
diff --git a/arch/powerpc/kernel/dma-swiotlb.c b/arch/powerpc/kernel/dma-swiotlb.c
index 3a15a7d945e9..132d61c91629 100644
--- a/arch/powerpc/kernel/dma-swiotlb.c
+++ b/arch/powerpc/kernel/dma-swiotlb.c
@@ -10,70 +10,12 @@
* option) any later version.
*
*/
-
-#include <linux/dma-direct.h>
#include <linux/memblock.h>
-#include <linux/pfn.h>
-#include <linux/of_platform.h>
-#include <linux/platform_device.h>
-#include <linux/pci.h>
-
#include <asm/machdep.h>
#include <asm/swiotlb.h>
-#include <asm/dma.h>
unsigned int ppc_swiotlb_enable;
-/*
- * At the moment, all platforms that use this code only require
- * swiotlb to be used if we're operating on HIGHMEM. Since
- * we don't ever call anything other than map_sg, unmap_sg,
- * map_page, and unmap_page on highmem, use normal dma_ops
- * for everything else.
- */
-const struct dma_map_ops powerpc_swiotlb_dma_ops = {
- .alloc = dma_direct_alloc,
- .free = dma_direct_free,
- .map_sg = dma_direct_map_sg,
- .unmap_sg = dma_direct_unmap_sg,
- .dma_supported = dma_direct_supported,
- .map_page = dma_direct_map_page,
- .unmap_page = dma_direct_unmap_page,
- .sync_single_for_cpu = dma_direct_sync_single_for_cpu,
- .sync_single_for_device = dma_direct_sync_single_for_device,
- .sync_sg_for_cpu = dma_direct_sync_sg_for_cpu,
- .sync_sg_for_device = dma_direct_sync_sg_for_device,
- .get_required_mask = dma_direct_get_required_mask,
-};
-
-static int ppc_swiotlb_bus_notify(struct notifier_block *nb,
- unsigned long action, void *data)
-{
- struct device *dev = data;
-
- /* We are only intereted in device addition */
- if (action != BUS_NOTIFY_ADD_DEVICE)
- return 0;
-
- /* May need to bounce if the device can't address all of DRAM */
- if ((dma_get_mask(dev) + 1) < memblock_end_of_DRAM())
- set_dma_ops(dev, &powerpc_swiotlb_dma_ops);
-
- return NOTIFY_DONE;
-}
-
-static struct notifier_block ppc_swiotlb_plat_bus_notifier = {
- .notifier_call = ppc_swiotlb_bus_notify,
- .priority = 0,
-};
-
-int __init swiotlb_setup_bus_notifier(void)
-{
- bus_register_notifier(&platform_bus_type,
- &ppc_swiotlb_plat_bus_notifier);
- return 0;
-}
-
void __init swiotlb_detect_4g(void)
{
if ((memblock_end_of_DRAM() - 1) > 0xffffffff)
diff --git a/arch/powerpc/kernel/dma.c b/arch/powerpc/kernel/dma.c
deleted file mode 100644
index b9f7283e7224..000000000000
--- a/arch/powerpc/kernel/dma.c
+++ /dev/null
@@ -1,62 +0,0 @@
-/*
- * Copyright (C) 2006 Benjamin Herrenschmidt, IBM Corporation
- *
- * Provide default implementations of the DMA mapping callbacks for
- * directly mapped busses.
- */
-
-#include <linux/device.h>
-#include <linux/dma-direct.h>
-#include <linux/dma-debug.h>
-#include <linux/gfp.h>
-#include <linux/memblock.h>
-#include <linux/export.h>
-#include <linux/pci.h>
-#include <asm/vio.h>
-#include <asm/bug.h>
-#include <asm/machdep.h>
-#include <asm/swiotlb.h>
-#include <asm/iommu.h>
-
-/*
- * Generic direct DMA implementation
- *
- * This implementation supports a per-device offset that can be applied if
- * the address at which memory is visible to devices is not 0. Platform code
- * can set archdata.dma_data to an unsigned long holding the offset. By
- * default the offset is PCI_DRAM_OFFSET.
- */
-
-const struct dma_map_ops dma_nommu_ops = {
-#ifdef CONFIG_NOT_COHERENT_CACHE
- .alloc = __dma_nommu_alloc_coherent,
- .free = __dma_nommu_free_coherent,
-#else
- .alloc = dma_direct_alloc,
- .free = dma_direct_free,
-#endif
- .map_sg = dma_direct_map_sg,
- .dma_supported = dma_direct_supported,
- .map_page = dma_direct_map_page,
- .get_required_mask = dma_direct_get_required_mask,
-#ifdef CONFIG_NOT_COHERENT_CACHE
- .unmap_sg = dma_direct_unmap_sg,
- .unmap_page = dma_direct_unmap_page,
- .sync_single_for_cpu = dma_direct_sync_single_for_cpu,
- .sync_single_for_device = dma_direct_sync_single_for_device,
- .sync_sg_for_cpu = dma_direct_sync_sg_for_cpu,
- .sync_sg_for_device = dma_direct_sync_sg_for_device,
-#endif
-};
-EXPORT_SYMBOL(dma_nommu_ops);
-
-static int __init dma_init(void)
-{
-#ifdef CONFIG_IBMVIO
- dma_debug_add_bus(&vio_bus_type);
-#endif
-
- return 0;
-}
-fs_initcall(dma_init);
-
diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
index a84707680525..23989175349c 100644
--- a/arch/powerpc/kernel/pci-common.c
+++ b/arch/powerpc/kernel/pci-common.c
@@ -62,7 +62,7 @@ resource_size_t isa_mem_base;
EXPORT_SYMBOL(isa_mem_base);
-static const struct dma_map_ops *pci_dma_ops = &dma_nommu_ops;
+static const struct dma_map_ops *pci_dma_ops;
void set_pci_dma_ops(const struct dma_map_ops *dma_ops)
{
diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
index ca00fbb97cf8..fa606aa98f6d 100644
--- a/arch/powerpc/kernel/setup-common.c
+++ b/arch/powerpc/kernel/setup-common.c
@@ -791,7 +791,6 @@ void arch_setup_pdev_archdata(struct platform_device *pdev)
{
pdev->archdata.dma_mask = DMA_BIT_MASK(32);
pdev->dev.dma_mask = &pdev->archdata.dma_mask;
- set_dma_ops(&pdev->dev, &dma_nommu_ops);
}
static __init void print_system_info(void)
diff --git a/arch/powerpc/mm/dma-noncoherent.c b/arch/powerpc/mm/dma-noncoherent.c
index c3d15d718a58..b5d2658c26af 100644
--- a/arch/powerpc/mm/dma-noncoherent.c
+++ b/arch/powerpc/mm/dma-noncoherent.c
@@ -152,8 +152,8 @@ static struct ppc_vm_region *ppc_vm_region_find(struct ppc_vm_region *head, unsi
* Allocate DMA-coherent memory space and return both the kernel remapped
* virtual and bus address for that space.
*/
-void *__dma_nommu_alloc_coherent(struct device *dev, size_t size,
- dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs)
+void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle,
+ gfp_t gfp, unsigned long attrs)
{
struct page *page;
struct ppc_vm_region *c;
@@ -254,7 +254,7 @@ void *__dma_nommu_alloc_coherent(struct device *dev, size_t size,
/*
* free a page as defined by the above mapping.
*/
-void __dma_nommu_free_coherent(struct device *dev, size_t size, void *vaddr,
+void arch_dma_free(struct device *dev, size_t size, void *vaddr,
dma_addr_t dma_handle, unsigned long attrs)
{
struct ppc_vm_region *c;
diff --git a/arch/powerpc/platforms/44x/warp.c b/arch/powerpc/platforms/44x/warp.c
index f467247fd1c4..18422dbd061a 100644
--- a/arch/powerpc/platforms/44x/warp.c
+++ b/arch/powerpc/platforms/44x/warp.c
@@ -47,7 +47,7 @@ static int __init warp_probe(void)
if (!of_machine_is_compatible("pika,warp"))
return 0;
- /* For __dma_nommu_alloc_coherent */
+ /* For arch_dma_alloc */
ISA_DMA_THRESHOLD = ~0L;
return 1;
diff --git a/arch/powerpc/platforms/85xx/corenet_generic.c b/arch/powerpc/platforms/85xx/corenet_generic.c
index b0dac307bebf..808da1e9c0a7 100644
--- a/arch/powerpc/platforms/85xx/corenet_generic.c
+++ b/arch/powerpc/platforms/85xx/corenet_generic.c
@@ -223,7 +223,3 @@ define_machine(corenet_generic) {
};
machine_arch_initcall(corenet_generic, corenet_gen_publish_devices);
-
-#ifdef CONFIG_SWIOTLB
-machine_arch_initcall(corenet_generic, swiotlb_setup_bus_notifier);
-#endif
diff --git a/arch/powerpc/platforms/85xx/ge_imp3a.c b/arch/powerpc/platforms/85xx/ge_imp3a.c
index f29c6f0909f3..c64fa2483ea9 100644
--- a/arch/powerpc/platforms/85xx/ge_imp3a.c
+++ b/arch/powerpc/platforms/85xx/ge_imp3a.c
@@ -202,8 +202,6 @@ static int __init ge_imp3a_probe(void)
machine_arch_initcall(ge_imp3a, mpc85xx_common_publish_devices);
-machine_arch_initcall(ge_imp3a, swiotlb_setup_bus_notifier);
-
define_machine(ge_imp3a) {
.name = "GE_IMP3A",
.probe = ge_imp3a_probe,
diff --git a/arch/powerpc/platforms/85xx/mpc8536_ds.c b/arch/powerpc/platforms/85xx/mpc8536_ds.c
index 94a7f92c858f..94194bad4954 100644
--- a/arch/powerpc/platforms/85xx/mpc8536_ds.c
+++ b/arch/powerpc/platforms/85xx/mpc8536_ds.c
@@ -57,8 +57,6 @@ static void __init mpc8536_ds_setup_arch(void)
machine_arch_initcall(mpc8536_ds, mpc85xx_common_publish_devices);
-machine_arch_initcall(mpc8536_ds, swiotlb_setup_bus_notifier);
-
/*
* Called very early, device-tree isn't unflattened
*/
diff --git a/arch/powerpc/platforms/85xx/mpc85xx_ds.c b/arch/powerpc/platforms/85xx/mpc85xx_ds.c
index dc9e035cc637..b7e29ce1f266 100644
--- a/arch/powerpc/platforms/85xx/mpc85xx_ds.c
+++ b/arch/powerpc/platforms/85xx/mpc85xx_ds.c
@@ -174,10 +174,6 @@ machine_arch_initcall(mpc8544_ds, mpc85xx_common_publish_devices);
machine_arch_initcall(mpc8572_ds, mpc85xx_common_publish_devices);
machine_arch_initcall(p2020_ds, mpc85xx_common_publish_devices);
-machine_arch_initcall(mpc8544_ds, swiotlb_setup_bus_notifier);
-machine_arch_initcall(mpc8572_ds, swiotlb_setup_bus_notifier);
-machine_arch_initcall(p2020_ds, swiotlb_setup_bus_notifier);
-
/*
* Called very early, device-tree isn't unflattened
*/
diff --git a/arch/powerpc/platforms/85xx/mpc85xx_mds.c b/arch/powerpc/platforms/85xx/mpc85xx_mds.c
index d7e440e6dba3..80939a425de5 100644
--- a/arch/powerpc/platforms/85xx/mpc85xx_mds.c
+++ b/arch/powerpc/platforms/85xx/mpc85xx_mds.c
@@ -367,10 +367,6 @@ machine_arch_initcall(mpc8568_mds, mpc85xx_publish_devices);
machine_arch_initcall(mpc8569_mds, mpc85xx_publish_devices);
machine_arch_initcall(p1021_mds, mpc85xx_common_publish_devices);
-machine_arch_initcall(mpc8568_mds, swiotlb_setup_bus_notifier);
-machine_arch_initcall(mpc8569_mds, swiotlb_setup_bus_notifier);
-machine_arch_initcall(p1021_mds, swiotlb_setup_bus_notifier);
-
static void __init mpc85xx_mds_pic_init(void)
{
struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN |
diff --git a/arch/powerpc/platforms/85xx/p1010rdb.c b/arch/powerpc/platforms/85xx/p1010rdb.c
index 78d13b364cd6..33ca373322e1 100644
--- a/arch/powerpc/platforms/85xx/p1010rdb.c
+++ b/arch/powerpc/platforms/85xx/p1010rdb.c
@@ -55,7 +55,6 @@ static void __init p1010_rdb_setup_arch(void)
}
machine_arch_initcall(p1010_rdb, mpc85xx_common_publish_devices);
-machine_arch_initcall(p1010_rdb, swiotlb_setup_bus_notifier);
/*
* Called very early, device-tree isn't unflattened
diff --git a/arch/powerpc/platforms/85xx/p1022_ds.c b/arch/powerpc/platforms/85xx/p1022_ds.c
index 9fb57f78cdbe..1f1af0557470 100644
--- a/arch/powerpc/platforms/85xx/p1022_ds.c
+++ b/arch/powerpc/platforms/85xx/p1022_ds.c
@@ -548,8 +548,6 @@ static void __init p1022_ds_setup_arch(void)
machine_arch_initcall(p1022_ds, mpc85xx_common_publish_devices);
-machine_arch_initcall(p1022_ds, swiotlb_setup_bus_notifier);
-
/*
* Called very early, device-tree isn't unflattened
*/
diff --git a/arch/powerpc/platforms/85xx/p1022_rdk.c b/arch/powerpc/platforms/85xx/p1022_rdk.c
index 276e00ab3dde..fd9e3e7ef234 100644
--- a/arch/powerpc/platforms/85xx/p1022_rdk.c
+++ b/arch/powerpc/platforms/85xx/p1022_rdk.c
@@ -128,8 +128,6 @@ static void __init p1022_rdk_setup_arch(void)
machine_arch_initcall(p1022_rdk, mpc85xx_common_publish_devices);
-machine_arch_initcall(p1022_rdk, swiotlb_setup_bus_notifier);
-
/*
* Called very early, device-tree isn't unflattened
*/
diff --git a/arch/powerpc/platforms/86xx/mpc86xx_hpcn.c b/arch/powerpc/platforms/86xx/mpc86xx_hpcn.c
index 17c6cd3d02e6..775a92353c83 100644
--- a/arch/powerpc/platforms/86xx/mpc86xx_hpcn.c
+++ b/arch/powerpc/platforms/86xx/mpc86xx_hpcn.c
@@ -121,7 +121,6 @@ static int __init declare_of_platform_devices(void)
return 0;
}
machine_arch_initcall(mpc86xx_hpcn, declare_of_platform_devices);
-machine_arch_initcall(mpc86xx_hpcn, swiotlb_setup_bus_notifier);
define_machine(mpc86xx_hpcn) {
.name = "MPC86xx HPCN",
diff --git a/arch/powerpc/platforms/cell/iommu.c b/arch/powerpc/platforms/cell/iommu.c
index a3c4057a8f65..06abd432b830 100644
--- a/arch/powerpc/platforms/cell/iommu.c
+++ b/arch/powerpc/platforms/cell/iommu.c
@@ -600,8 +600,6 @@ static int cell_of_bus_notify(struct notifier_block *nb, unsigned long action,
if (cell_iommu_enabled)
dev->dma_ops = &dma_iommu_ops;
- else
- dev->dma_ops = &dma_nommu_ops;
cell_dma_dev_setup(dev);
return 0;
}
@@ -727,7 +725,6 @@ static int __init cell_iommu_init_disabled(void)
unsigned long base = 0, size;
/* When no iommu is present, we use direct DMA ops */
- set_pci_dma_ops(&dma_nommu_ops);
/* First make sure all IOC translation is turned off */
cell_disable_iommus();
diff --git a/arch/powerpc/platforms/pasemi/iommu.c b/arch/powerpc/platforms/pasemi/iommu.c
index f2971522fb4a..bbeb6a1b0393 100644
--- a/arch/powerpc/platforms/pasemi/iommu.c
+++ b/arch/powerpc/platforms/pasemi/iommu.c
@@ -186,7 +186,7 @@ static void pci_dma_dev_setup_pasemi(struct pci_dev *dev)
*/
if (dev->vendor == 0x1959 && dev->device == 0xa007 &&
!firmware_has_feature(FW_FEATURE_LPAR)) {
- dev->dev.dma_ops = &dma_nommu_ops;
+ dev->dev.dma_ops = NULL;
/*
* Set the coherent DMA mask to prevent the iommu
* being used unnecessarily
diff --git a/arch/powerpc/platforms/pasemi/setup.c b/arch/powerpc/platforms/pasemi/setup.c
index c0532999f854..46dd463faaa7 100644
--- a/arch/powerpc/platforms/pasemi/setup.c
+++ b/arch/powerpc/platforms/pasemi/setup.c
@@ -411,55 +411,6 @@ static int pas_machine_check_handler(struct pt_regs *regs)
return !!(srr1 & 0x2);
}
-#ifdef CONFIG_PCMCIA
-static int pcmcia_notify(struct notifier_block *nb, unsigned long action,
- void *data)
-{
- struct device *dev = data;
- struct device *parent;
- struct pcmcia_device *pdev = to_pcmcia_dev(dev);
-
- /* We are only intereted in device addition */
- if (action != BUS_NOTIFY_ADD_DEVICE)
- return 0;
-
- parent = pdev->socket->dev.parent;
-
- /* We know electra_cf devices will always have of_node set, since
- * electra_cf is an of_platform driver.
- */
- if (!parent->of_node)
- return 0;
-
- if (!of_device_is_compatible(parent->of_node, "electra-cf"))
- return 0;
-
- /* We use the direct ops for localbus */
- dev->dma_ops = &dma_nommu_ops;
-
- return 0;
-}
-
-static struct notifier_block pcmcia_notifier = {
- .notifier_call = pcmcia_notify,
-};
-
-static inline void pasemi_pcmcia_init(void)
-{
- extern struct bus_type pcmcia_bus_type;
-
- bus_register_notifier(&pcmcia_bus_type, &pcmcia_notifier);
-}
-
-#else
-
-static inline void pasemi_pcmcia_init(void)
-{
-}
-
-#endif
-
-
static const struct of_device_id pasemi_bus_ids[] = {
/* Unfortunately needed for legacy firmwares */
{ .type = "localbus", },
@@ -472,8 +423,6 @@ static const struct of_device_id pasemi_bus_ids[] = {
static int __init pasemi_publish_devices(void)
{
- pasemi_pcmcia_init();
-
/* Publish OF platform devices for SDC and other non-PCI devices */
of_platform_bus_probe(NULL, pasemi_bus_ids, NULL);
diff --git a/arch/powerpc/platforms/powernv/npu-dma.c b/arch/powerpc/platforms/powernv/npu-dma.c
index 2ca79823e3ba..53b3c86c4c1d 100644
--- a/arch/powerpc/platforms/powernv/npu-dma.c
+++ b/arch/powerpc/platforms/powernv/npu-dma.c
@@ -216,7 +216,7 @@ static void pnv_npu_dma_set_32(struct pnv_ioda_pe *npe)
* their parent device so drivers shouldn't be doing DMA
* operations directly on these devices.
*/
- set_dma_ops(&npe->pdev->dev, NULL);
+ set_dma_ops(&npe->pdev->dev, &dma_dummy_ops);
}
/*
diff --git a/arch/powerpc/platforms/pseries/vio.c b/arch/powerpc/platforms/pseries/vio.c
index b7dc8bd41fd0..141795275ccb 100644
--- a/arch/powerpc/platforms/pseries/vio.c
+++ b/arch/powerpc/platforms/pseries/vio.c
@@ -1699,3 +1699,10 @@ int vio_disable_interrupts(struct vio_dev *dev)
}
EXPORT_SYMBOL(vio_disable_interrupts);
#endif /* CONFIG_PPC_PSERIES */
+
+static int __init vio_init(void)
+{
+ dma_debug_add_bus(&vio_bus_type);
+ return 0;
+}
+fs_initcall(vio_init);
diff --git a/arch/powerpc/sysdev/fsl_pci.c b/arch/powerpc/sysdev/fsl_pci.c
index 0c6510f340cb..23000ca7f688 100644
--- a/arch/powerpc/sysdev/fsl_pci.c
+++ b/arch/powerpc/sysdev/fsl_pci.c
@@ -124,10 +124,8 @@ static void pci_dma_dev_setup_swiotlb(struct pci_dev *pdev)
static void setup_swiotlb_ops(struct pci_controller *hose)
{
- if (ppc_swiotlb_enable) {
+ if (ppc_swiotlb_enable)
hose->controller_ops.dma_dev_setup = pci_dma_dev_setup_swiotlb;
- set_pci_dma_ops(&powerpc_swiotlb_dma_ops);
- }
}
#else
static inline void setup_swiotlb_ops(struct pci_controller *hose) {}
@@ -141,7 +139,6 @@ static void fsl_pci_dma_set_mask(struct device *dev, u64 dma_mask)
*/
if (dev_is_pci(dev) && dma_mask >= pci64_dma_offset * 2 - 1) {
dev->bus_dma_mask = 0;
- set_dma_ops(dev, &dma_nommu_ops);
set_dma_offset(dev, pci64_dma_offset);
}
}
diff --git a/drivers/misc/cxl/vphb.c b/drivers/misc/cxl/vphb.c
index 49da2f744bbf..b64adc0f0865 100644
--- a/drivers/misc/cxl/vphb.c
+++ b/drivers/misc/cxl/vphb.c
@@ -43,7 +43,6 @@ static bool cxl_pci_enable_device_hook(struct pci_dev *dev)
return false;
}
- set_dma_ops(&dev->dev, &dma_nommu_ops);
set_dma_offset(&dev->dev, PAGE_OFFSET);
/*
--
2.20.1