[PATCH 23/33] powerpc/dma: remove max_direct_dma_addr

Christoph Hellwig
2018-10-09T13:26:24Z

The max_direct_dma_addr duplicates the bus_dma_mask field in struct
device. Use the generic field instead.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
arch/powerpc/include/asm/device.h | 3 ---
arch/powerpc/include/asm/dma-direct.h | 4 +---
arch/powerpc/kernel/dma-swiotlb.c | 20 --------------------
arch/powerpc/kernel/dma.c | 5 ++---
arch/powerpc/sysdev/fsl_pci.c | 3 +--
5 files changed, 4 insertions(+), 31 deletions(-)

diff --git a/arch/powerpc/include/asm/device.h b/arch/powerpc/include/asm/device.h
index 3814e1c2d4bc..a130be13ee83 100644
--- a/arch/powerpc/include/asm/device.h
+++ b/arch/powerpc/include/asm/device.h
@@ -38,9 +38,6 @@ struct dev_archdata {
#ifdef CONFIG_IOMMU_API
void *iommu_domain;
#endif
-#ifdef CONFIG_SWIOTLB
- dma_addr_t max_direct_dma_addr;
-#endif
#ifdef CONFIG_PPC64
struct pci_dn *pci_data;
#endif
diff --git a/arch/powerpc/include/asm/dma-direct.h b/arch/powerpc/include/asm/dma-direct.h
index 7702875aabb7..e00ab5d0612d 100644
--- a/arch/powerpc/include/asm/dma-direct.h
+++ b/arch/powerpc/include/asm/dma-direct.h
@@ -5,9 +5,7 @@
static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
{
#ifdef CONFIG_SWIOTLB
- struct dev_archdata *sd = &dev->archdata;
-
- if (sd->max_direct_dma_addr && addr + size > sd->max_direct_dma_addr)
+ if (dev->bus_dma_mask && addr + size > dev->bus_dma_mask)
return false;
#endif

diff --git a/arch/powerpc/kernel/dma-swiotlb.c b/arch/powerpc/kernel/dma-swiotlb.c
index 60cb86338233..e05d95ff50ad 100644
--- a/arch/powerpc/kernel/dma-swiotlb.c
+++ b/arch/powerpc/kernel/dma-swiotlb.c
@@ -24,21 +24,6 @@

unsigned int ppc_swiotlb_enable;

-static u64 swiotlb_powerpc_get_required(struct device *dev)
-{
- u64 end, mask, max_direct_dma_addr = dev->archdata.max_direct_dma_addr;
-
- end = memblock_end_of_DRAM();
- if (max_direct_dma_addr && end > max_direct_dma_addr)
- end = max_direct_dma_addr;
- end += get_dma_offset(dev);
-
- mask = 1ULL << (fls64(end) - 1);
- mask += mask - 1;
-
- return mask;
-}
-
/*
* At the moment, all platforms that use this code only require
* swiotlb to be used if we're operating on HIGHMEM. Since
@@ -60,22 +45,17 @@ const struct dma_map_ops powerpc_swiotlb_dma_ops = {
.sync_sg_for_cpu = swiotlb_sync_sg_for_cpu,
.sync_sg_for_device = swiotlb_sync_sg_for_device,
.mapping_error = swiotlb_dma_mapping_error,
- .get_required_mask = swiotlb_powerpc_get_required,
};

static int ppc_swiotlb_bus_notify(struct notifier_block *nb,
unsigned long action, void *data)
{
struct device *dev = data;
- struct dev_archdata *sd;

/* We are only intereted in device addition */
if (action != BUS_NOTIFY_ADD_DEVICE)
return 0;

- sd = &dev->archdata;
- sd->max_direct_dma_addr = 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);
diff --git a/arch/powerpc/kernel/dma.c b/arch/powerpc/kernel/dma.c
index bef91b8ad064..e3d2c15b209c 100644
--- a/arch/powerpc/kernel/dma.c
+++ b/arch/powerpc/kernel/dma.c
@@ -30,11 +30,10 @@
static u64 __maybe_unused get_pfn_limit(struct device *dev)
{
u64 pfn = (dev->coherent_dma_mask >> PAGE_SHIFT) + 1;
- struct dev_archdata __maybe_unused *sd = &dev->archdata;

#ifdef CONFIG_SWIOTLB
- if (sd->max_direct_dma_addr && dev->dma_ops == &powerpc_swiotlb_dma_ops)
- pfn = min_t(u64, pfn, sd->max_direct_dma_addr >> PAGE_SHIFT);
+ if (dev->bus_dma_mask && dev->dma_ops == &powerpc_swiotlb_dma_ops)
+ pfn = min_t(u64, pfn, dev->bus_dma_mask >> PAGE_SHIFT);
#endif

return pfn;
diff --git a/arch/powerpc/sysdev/fsl_pci.c b/arch/powerpc/sysdev/fsl_pci.c
index 561f97d698cc..f136567a5ed5 100644
--- a/arch/powerpc/sysdev/fsl_pci.c
+++ b/arch/powerpc/sysdev/fsl_pci.c
@@ -117,9 +117,8 @@ static u64 pci64_dma_offset;
static void pci_dma_dev_setup_swiotlb(struct pci_dev *pdev)
{
struct pci_controller *hose = pci_bus_to_host(pdev->bus);
- struct dev_archdata *sd = &pdev->dev.archdata;

- sd->max_direct_dma_addr =
+ pdev->dev.bus_dma_mask =
hose->dma_window_base_cur + hose->dma_window_size;
}

--
2.19.0