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Subject[tip:x86/cleanups] x86/pci: Clean up usage of X86_DEV_DMA_OPS
Commit-ID:  15854edd193ae5d9daf8f50ce5f9f1724cebe344
Gitweb: https://git.kernel.org/tip/15854edd193ae5d9daf8f50ce5f9f1724cebe344
Author: Christoph Hellwig <hch@lst.de>
AuthorDate: Wed, 10 Apr 2019 10:02:20 +0200
Committer: Ingo Molnar <mingo@kernel.org>
CommitDate: Wed, 24 Apr 2019 13:12:05 +0200

x86/pci: Clean up usage of X86_DEV_DMA_OPS

We have supported per-device dma_map_ops in generic code for a long
time, and this symbol just guards the inclusion of the dma_map_ops
registry used for vmd. Stop enabling it for anything but vmd.

No change in functionality intended.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20190410080220.21705-3-hch@lst.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
arch/x86/Kconfig | 3 ---
drivers/misc/mic/Kconfig | 4 ++--
drivers/pci/controller/Kconfig | 1 +
drivers/pci/controller/vmd.c | 7 -------
4 files changed, 3 insertions(+), 12 deletions(-)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 7f93e013e6db..60f6459344bc 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -28,7 +28,6 @@ config X86_64
select MODULES_USE_ELF_RELA
select NEED_DMA_MAP_STATE
select SWIOTLB
- select X86_DEV_DMA_OPS
select ARCH_HAS_SYSCALL_WRAPPER

#
@@ -703,7 +702,6 @@ config STA2X11
bool "STA2X11 Companion Chip Support"
depends on X86_32_NON_STANDARD && PCI
select ARCH_HAS_PHYS_TO_DMA
- select X86_DEV_DMA_OPS
select SWIOTLB
select MFD_STA2X11
select GPIOLIB
@@ -2883,7 +2881,6 @@ config HAVE_ATOMIC_IOMAP

config X86_DEV_DMA_OPS
bool
- depends on X86_64 || STA2X11

config HAVE_GENERIC_GUP
def_bool y
diff --git a/drivers/misc/mic/Kconfig b/drivers/misc/mic/Kconfig
index 242dcee14689..6736f72cc14a 100644
--- a/drivers/misc/mic/Kconfig
+++ b/drivers/misc/mic/Kconfig
@@ -4,7 +4,7 @@ comment "Intel MIC Bus Driver"

config INTEL_MIC_BUS
tristate "Intel MIC Bus Driver"
- depends on 64BIT && PCI && X86 && X86_DEV_DMA_OPS
+ depends on 64BIT && PCI && X86
help
This option is selected by any driver which registers a
device or driver on the MIC Bus, such as CONFIG_INTEL_MIC_HOST,
@@ -21,7 +21,7 @@ comment "SCIF Bus Driver"

config SCIF_BUS
tristate "SCIF Bus Driver"
- depends on 64BIT && PCI && X86 && X86_DEV_DMA_OPS
+ depends on 64BIT && PCI && X86
help
This option is selected by any driver which registers a
device or driver on the SCIF Bus, such as CONFIG_INTEL_MIC_HOST
diff --git a/drivers/pci/controller/Kconfig b/drivers/pci/controller/Kconfig
index 6012f3059acd..011c57cae4b0 100644
--- a/drivers/pci/controller/Kconfig
+++ b/drivers/pci/controller/Kconfig
@@ -267,6 +267,7 @@ config PCIE_TANGO_SMP8759

config VMD
depends on PCI_MSI && X86_64 && SRCU
+ select X86_DEV_DMA_OPS
tristate "Intel Volume Management Device Driver"
---help---
Adds support for the Intel Volume Management Device (VMD). VMD is a
diff --git a/drivers/pci/controller/vmd.c b/drivers/pci/controller/vmd.c
index cf6816b55b5e..999a5509e57e 100644
--- a/drivers/pci/controller/vmd.c
+++ b/drivers/pci/controller/vmd.c
@@ -95,10 +95,8 @@ struct vmd_dev {
struct irq_domain *irq_domain;
struct pci_bus *bus;

-#ifdef CONFIG_X86_DEV_DMA_OPS
struct dma_map_ops dma_ops;
struct dma_domain dma_domain;
-#endif
};

static inline struct vmd_dev *vmd_from_bus(struct pci_bus *bus)
@@ -293,7 +291,6 @@ static struct msi_domain_info vmd_msi_domain_info = {
.chip = &vmd_msi_controller,
};

-#ifdef CONFIG_X86_DEV_DMA_OPS
/*
* VMD replaces the requester ID with its own. DMA mappings for devices in a
* VMD domain need to be mapped for the VMD, not the device requiring
@@ -438,10 +435,6 @@ static void vmd_setup_dma_ops(struct vmd_dev *vmd)
add_dma_domain(domain);
}
#undef ASSIGN_VMD_DMA_OPS
-#else
-static void vmd_teardown_dma_ops(struct vmd_dev *vmd) {}
-static void vmd_setup_dma_ops(struct vmd_dev *vmd) {}
-#endif

static char __iomem *vmd_cfg_addr(struct vmd_dev *vmd, struct pci_bus *bus,
unsigned int devfn, int reg, int len)
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