[PATCH 11/13] ARM: ixp4xx: Drop custom DMA coherency and bouncing
STALE1706d
From: Linus Walleij <hidden>
Date: 2022-01-27 00:45:00
Subsystem:
arm port, arm/intel ixp4xx arm architecture, dma mapping helpers, the rest · Maintainers:
Russell King, Linus Walleij, Imre Kaloz, Marek Szyprowski, Linus Torvalds
Revision v1 of 2 in this series.
Revisions (2)
- v1 current
- v2 [diff vs current]
The new PCI driver does not need any of this stuff, so just drop it. Signed-off-by: Linus Walleij <redacted> --- arch/arm/Kconfig | 5 --- arch/arm/mach-ixp4xx/common.c | 57 ----------------------------------- kernel/dma/mapping.c | 2 -- 3 files changed, 64 deletions(-)
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 3a95203236d2..ec0dbaf73a81 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig@@ -217,9 +217,6 @@ config ARCH_MAY_HAVE_PC_FDC config ARCH_SUPPORTS_UPROBES def_bool y -config ARCH_HAS_DMA_SET_COHERENT_MASK - bool - config GENERIC_ISA_DMA bool
@@ -381,10 +378,8 @@ config ARCH_IOP32X config ARCH_IXP4XX bool "IXP4xx-based" depends on MMU - select ARCH_HAS_DMA_SET_COHERENT_MASK select ARCH_SUPPORTS_BIG_ENDIAN select CPU_XSCALE - select DMABOUNCE if PCI select GENERIC_IRQ_MULTI_HANDLER select GPIO_IXP4XX select GPIOLIB
diff --git a/arch/arm/mach-ixp4xx/common.c b/arch/arm/mach-ixp4xx/common.c
index 4e51514ace6d..310e1602fbfc 100644
--- a/arch/arm/mach-ixp4xx/common.c
+++ b/arch/arm/mach-ixp4xx/common.c@@ -30,7 +30,6 @@ #include <linux/soc/ixp4xx/cpu.h> #include <linux/irqchip/irq-ixp4xx.h> #include <linux/platform_data/timer-ixp4xx.h> -#include <linux/dma-map-ops.h> #include <mach/hardware.h> #include <linux/uaccess.h> #include <asm/page.h>
@@ -330,59 +329,3 @@ void ixp4xx_restart(enum reboot_mode mode, const char *cmd) *IXP4XX_OSWE = IXP4XX_WDT_RESET_ENABLE | IXP4XX_WDT_COUNT_ENABLE; } } - -#ifdef CONFIG_PCI -static int ixp4xx_needs_bounce(struct device *dev, dma_addr_t dma_addr, size_t size) -{ - return (dma_addr + size) > SZ_64M; -} - -static int ixp4xx_platform_notify_remove(struct device *dev) -{ - if (dev_is_pci(dev)) - dmabounce_unregister_dev(dev); - - return 0; -} -#endif - -/* - * Setup DMA mask to 64MB on PCI devices and 4 GB on all other things. - */ -static int ixp4xx_platform_notify(struct device *dev) -{ - dev->dma_mask = &dev->coherent_dma_mask; - -#ifdef CONFIG_PCI - if (dev_is_pci(dev)) { - dev->coherent_dma_mask = DMA_BIT_MASK(28); /* 64 MB */ - dmabounce_register_dev(dev, 2048, 4096, ixp4xx_needs_bounce); - return 0; - } -#endif - - dev->coherent_dma_mask = DMA_BIT_MASK(32); - return 0; -} - -int dma_set_coherent_mask(struct device *dev, u64 mask) -{ - if (dev_is_pci(dev)) - mask &= DMA_BIT_MASK(28); /* 64 MB */ - - if ((mask & DMA_BIT_MASK(28)) == DMA_BIT_MASK(28)) { - dev->coherent_dma_mask = mask; - return 0; - } - - return -EIO; /* device wanted sub-64MB mask */ -} -EXPORT_SYMBOL(dma_set_coherent_mask); - -void __init ixp4xx_init_early(void) -{ - platform_notify = ixp4xx_platform_notify; -#ifdef CONFIG_PCI - platform_notify_remove = ixp4xx_platform_notify_remove; -#endif -}
diff --git a/kernel/dma/mapping.c b/kernel/dma/mapping.c
index 9478eccd1c8e..559461a826ba 100644
--- a/kernel/dma/mapping.c
+++ b/kernel/dma/mapping.c@@ -745,7 +745,6 @@ int dma_set_mask(struct device *dev, u64 mask) } EXPORT_SYMBOL(dma_set_mask); -#ifndef CONFIG_ARCH_HAS_DMA_SET_COHERENT_MASK int dma_set_coherent_mask(struct device *dev, u64 mask) { /*
@@ -761,7 +760,6 @@ int dma_set_coherent_mask(struct device *dev, u64 mask) return 0; } EXPORT_SYMBOL(dma_set_coherent_mask); -#endif size_t dma_max_mapping_size(struct device *dev) {
--
2.34.1
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