| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <20181114082314.8965-21-hch@lst.de>
Date: Wed, 14 Nov 2018 09:23:00 +0100
From: Christoph Hellwig <hch@....de>
To: Benjamin Herrenschmidt <benh@...nel.crashing.org>,
Paul Mackerras <paulus@...ba.org>,
Michael Ellerman <mpe@...erman.id.au>
Cc: linuxppc-dev@...ts.ozlabs.org, iommu@...ts.linux-foundation.org,
linux-mm@...ck.org, linux-arch@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH 20/34] powerpc/dma: stop overriding dma_get_required_mask
The ppc_md and pci_controller_ops methods are unused now and can be
removed. The dma_nommu implementation is generic to the generic one
except for using max_pfn instead of calling into the memblock API,
and all other dma_map_ops instances implement a method of their own.
Signed-off-by: Christoph Hellwig <hch@....de>
---
arch/powerpc/include/asm/device.h | 2 --
arch/powerpc/include/asm/dma-mapping.h | 2 --
arch/powerpc/include/asm/machdep.h | 2 --
arch/powerpc/include/asm/pci-bridge.h | 1 -
arch/powerpc/kernel/dma.c | 30 --------------------------
drivers/base/platform.c | 2 --
6 files changed, 39 deletions(-)
diff --git a/arch/powerpc/include/asm/device.h b/arch/powerpc/include/asm/device.h
index 1aa53318b4bc..3814e1c2d4bc 100644
--- a/arch/powerpc/include/asm/device.h
+++ b/arch/powerpc/include/asm/device.h
@@ -59,6 +59,4 @@ struct pdev_archdata {
u64 dma_mask;
};
-#define ARCH_HAS_DMA_GET_REQUIRED_MASK
-
#endif /* _ASM_POWERPC_DEVICE_H */
diff --git a/arch/powerpc/include/asm/dma-mapping.h b/arch/powerpc/include/asm/dma-mapping.h
index 140ce5ad3120..e5ee4ac97c14 100644
--- a/arch/powerpc/include/asm/dma-mapping.h
+++ b/arch/powerpc/include/asm/dma-mapping.h
@@ -113,7 +113,5 @@ static inline void set_dma_offset(struct device *dev, dma_addr_t off)
#define HAVE_ARCH_DMA_SET_MASK 1
extern int dma_set_mask(struct device *dev, u64 dma_mask);
-extern u64 __dma_get_required_mask(struct device *dev);
-
#endif /* __KERNEL__ */
#endif /* _ASM_DMA_MAPPING_H */
diff --git a/arch/powerpc/include/asm/machdep.h b/arch/powerpc/include/asm/machdep.h
index 8311869005fa..7b70dcbce1b9 100644
--- a/arch/powerpc/include/asm/machdep.h
+++ b/arch/powerpc/include/asm/machdep.h
@@ -47,9 +47,7 @@ struct machdep_calls {
#endif
#endif /* CONFIG_PPC64 */
- /* Platform set_dma_mask and dma_get_required_mask overrides */
int (*dma_set_mask)(struct device *dev, u64 dma_mask);
- u64 (*dma_get_required_mask)(struct device *dev);
int (*probe)(void);
void (*setup_arch)(void); /* Optional, may be NULL */
diff --git a/arch/powerpc/include/asm/pci-bridge.h b/arch/powerpc/include/asm/pci-bridge.h
index 5c7a1e7ffc8a..aace7033fa02 100644
--- a/arch/powerpc/include/asm/pci-bridge.h
+++ b/arch/powerpc/include/asm/pci-bridge.h
@@ -46,7 +46,6 @@ struct pci_controller_ops {
#endif
int (*dma_set_mask)(struct pci_dev *pdev, u64 dma_mask);
- u64 (*dma_get_required_mask)(struct pci_dev *pdev);
void (*shutdown)(struct pci_controller *hose);
};
diff --git a/arch/powerpc/kernel/dma.c b/arch/powerpc/kernel/dma.c
index 6c368b6820bb..154e1cdae7f9 100644
--- a/arch/powerpc/kernel/dma.c
+++ b/arch/powerpc/kernel/dma.c
@@ -246,7 +246,6 @@ const struct dma_map_ops dma_nommu_ops = {
.map_sg = dma_nommu_map_sg,
.dma_supported = dma_nommu_dma_supported,
.map_page = dma_nommu_map_page,
- .get_required_mask = dma_nommu_get_required_mask,
#ifdef CONFIG_NOT_COHERENT_CACHE
.sync_single_for_cpu = dma_nommu_sync_single,
.sync_single_for_device = dma_nommu_sync_single,
@@ -294,35 +293,6 @@ int dma_set_mask(struct device *dev, u64 dma_mask)
}
EXPORT_SYMBOL(dma_set_mask);
-u64 __dma_get_required_mask(struct device *dev)
-{
- const struct dma_map_ops *dma_ops = get_dma_ops(dev);
-
- if (unlikely(dma_ops == NULL))
- return 0;
-
- if (dma_ops->get_required_mask)
- return dma_ops->get_required_mask(dev);
-
- return DMA_BIT_MASK(8 * sizeof(dma_addr_t));
-}
-
-u64 dma_get_required_mask(struct device *dev)
-{
- if (ppc_md.dma_get_required_mask)
- return ppc_md.dma_get_required_mask(dev);
-
- if (dev_is_pci(dev)) {
- struct pci_dev *pdev = to_pci_dev(dev);
- struct pci_controller *phb = pci_bus_to_host(pdev->bus);
- if (phb->controller_ops.dma_get_required_mask)
- return phb->controller_ops.dma_get_required_mask(pdev);
- }
-
- return __dma_get_required_mask(dev);
-}
-EXPORT_SYMBOL_GPL(dma_get_required_mask);
-
static int __init dma_init(void)
{
#ifdef CONFIG_IBMVIO
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 41b91af95afb..648b6213e322 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -1179,7 +1179,6 @@ int __init platform_bus_init(void)
return error;
}
-#ifndef ARCH_HAS_DMA_GET_REQUIRED_MASK
static u64 dma_default_get_required_mask(struct device *dev)
{
u32 low_totalram = ((max_pfn - 1) << PAGE_SHIFT);
@@ -1208,7 +1207,6 @@ u64 dma_get_required_mask(struct device *dev)
return dma_default_get_required_mask(dev);
}
EXPORT_SYMBOL_GPL(dma_get_required_mask);
-#endif
static __initdata LIST_HEAD(early_platform_driver_list);
static __initdata LIST_HEAD(early_platform_device_list);
--
2.19.1
Powered by blists - more mailing lists