| Message ID | 20200917173229.3311382-2-hch@lst.de |
|---|---|
| State | New |
| Headers | show |
| Series | [1/4] ARM/omap1: switch to use dma_direct_set_offset for lbus DMA offsets | expand |
On Mon, Sep 21, 2020 at 09:44:18AM +0300, Tony Lindgren wrote: > * Janusz Krzysztofik <jmkrzyszt@gmail.com> [200919 22:29]: > > Hi Tony, > > > > On Friday, September 18, 2020 7:49:33 A.M. CEST Tony Lindgren wrote: > > > * Christoph Hellwig <hch@lst.de> [200917 17:37]: > > > > Switch the omap1510 platform ohci device to use dma_direct_set_offset > > > > to set the DMA offset instead of using direct hooks into the DMA > > > > mapping code and remove the now unused hooks. > > > > > > Looks nice to me :) I still can't test this probably for few more weeks > > > though but hopefully Aaro or Janusz (Added to Cc) can test it. > > > > Works for me on Amstrad Delta (tested with a USB ethernet adapter). > > > > Tested-by: Janusz Krzysztofik <jmkrzyszt@gmail.com> > > Great, good to hear! And thanks for testing it. > > Christoph, feel free to queue this along with the other patches: > > Acked-by: Tony Lindgren <tony@atomide.com> > > Or let me know if you want me to pick it up. I'd prefer to pick it up through the dma-mapping tree, but preferably I'd pick the whole series up once Russell has tested footwinder.
On Mon, Sep 21, 2020 at 08:47:23AM +0200, Christoph Hellwig wrote: > On Mon, Sep 21, 2020 at 09:44:18AM +0300, Tony Lindgren wrote: > > * Janusz Krzysztofik <jmkrzyszt@gmail.com> [200919 22:29]: > > > Hi Tony, > > > > > > On Friday, September 18, 2020 7:49:33 A.M. CEST Tony Lindgren wrote: > > > > * Christoph Hellwig <hch@lst.de> [200917 17:37]: > > > > > Switch the omap1510 platform ohci device to use dma_direct_set_offset > > > > > to set the DMA offset instead of using direct hooks into the DMA > > > > > mapping code and remove the now unused hooks. > > > > > > > > Looks nice to me :) I still can't test this probably for few more weeks > > > > though but hopefully Aaro or Janusz (Added to Cc) can test it. > > > > > > Works for me on Amstrad Delta (tested with a USB ethernet adapter). > > > > > > Tested-by: Janusz Krzysztofik <jmkrzyszt@gmail.com> > > > > Great, good to hear! And thanks for testing it. > > > > Christoph, feel free to queue this along with the other patches: > > > > Acked-by: Tony Lindgren <tony@atomide.com> > > > > Or let me know if you want me to pick it up. > > I'd prefer to pick it up through the dma-mapping tree, but preferably > I'd pick the whole series up once Russell has tested footwinder. I don't think that's going to happen very soon... seems way too much effort to pull down the appropriate tree to build and test. Sorry. -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last!
On Mon, Sep 21, 2020 at 09:44:18AM +0300, Tony Lindgren wrote: > > > Looks nice to me :) I still can't test this probably for few more weeks > > > though but hopefully Aaro or Janusz (Added to Cc) can test it. > > > > Works for me on Amstrad Delta (tested with a USB ethernet adapter). > > > > Tested-by: Janusz Krzysztofik <jmkrzyszt@gmail.com> > > Great, good to hear! And thanks for testing it. > > Christoph, feel free to queue this along with the other patches: > > Acked-by: Tony Lindgren <tony@atomide.com> > > Or let me know if you want me to pick it up. I've pulled it in now that the other patches are unlikely to be tested in time for 5.10.
diff --git a/arch/arm/include/asm/dma-direct.h b/arch/arm/include/asm/dma-direct.h index 436544aeb83405..77fcb7ee5ec907 100644 --- a/arch/arm/include/asm/dma-direct.h +++ b/arch/arm/include/asm/dma-direct.h @@ -9,7 +9,6 @@ * functions used internally by the DMA-mapping API to provide DMA * addresses. They must not be used by drivers. */ -#ifndef __arch_pfn_to_dma static inline dma_addr_t pfn_to_dma(struct device *dev, unsigned long pfn) { if (dev && dev->dma_range_map) @@ -34,23 +33,6 @@ static inline dma_addr_t virt_to_dma(struct device *dev, void *addr) return (dma_addr_t)__virt_to_bus((unsigned long)(addr)); } -#else -static inline dma_addr_t pfn_to_dma(struct device *dev, unsigned long pfn) -{ - return __arch_pfn_to_dma(dev, pfn); -} - -static inline unsigned long dma_to_pfn(struct device *dev, dma_addr_t addr) -{ - return __arch_dma_to_pfn(dev, addr); -} - -static inline dma_addr_t virt_to_dma(struct device *dev, void *addr) -{ - return __arch_virt_to_dma(dev, addr); -} -#endif - static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) { unsigned int offset = paddr & ~PAGE_MASK; diff --git a/arch/arm/mach-omap1/include/mach/memory.h b/arch/arm/mach-omap1/include/mach/memory.h index 1142560e0078f5..36bc0000cb6ab8 100644 --- a/arch/arm/mach-omap1/include/mach/memory.h +++ b/arch/arm/mach-omap1/include/mach/memory.h @@ -14,42 +14,11 @@ * OMAP-1510 bus address is translated into a Local Bus address if the * OMAP bus type is lbus. We do the address translation based on the * device overriding the defaults used in the dma-mapping API. - * Note that the is_lbus_device() test is not very efficient on 1510 - * because of the strncmp(). */ -#if defined(CONFIG_ARCH_OMAP15XX) && !defined(__ASSEMBLER__) /* * OMAP-1510 Local Bus address offset */ #define OMAP1510_LB_OFFSET UL(0x30000000) -#define virt_to_lbus(x) ((x) - PAGE_OFFSET + OMAP1510_LB_OFFSET) -#define lbus_to_virt(x) ((x) - OMAP1510_LB_OFFSET + PAGE_OFFSET) -#define is_lbus_device(dev) (cpu_is_omap15xx() && dev && (strncmp(dev_name(dev), "ohci", 4) == 0)) - -#define __arch_pfn_to_dma(dev, pfn) \ - ({ dma_addr_t __dma = __pfn_to_phys(pfn); \ - if (is_lbus_device(dev)) \ - __dma = __dma - PHYS_OFFSET + OMAP1510_LB_OFFSET; \ - __dma; }) - -#define __arch_dma_to_pfn(dev, addr) \ - ({ dma_addr_t __dma = addr; \ - if (is_lbus_device(dev)) \ - __dma += PHYS_OFFSET - OMAP1510_LB_OFFSET; \ - __phys_to_pfn(__dma); \ - }) - -#define __arch_dma_to_virt(dev, addr) ({ (void *) (is_lbus_device(dev) ? \ - lbus_to_virt(addr) : \ - __phys_to_virt(addr)); }) - -#define __arch_virt_to_dma(dev, addr) ({ unsigned long __addr = (unsigned long)(addr); \ - (dma_addr_t) (is_lbus_device(dev) ? \ - virt_to_lbus(__addr) : \ - __virt_to_phys(__addr)); }) - -#endif /* CONFIG_ARCH_OMAP15XX */ - #endif diff --git a/arch/arm/mach-omap1/usb.c b/arch/arm/mach-omap1/usb.c index d8e9bbda8f7bdd..ba8566204ea9f4 100644 --- a/arch/arm/mach-omap1/usb.c +++ b/arch/arm/mach-omap1/usb.c @@ -9,6 +9,7 @@ #include <linux/kernel.h> #include <linux/init.h> #include <linux/platform_device.h> +#include <linux/dma-mapping.h> #include <linux/io.h> #include <asm/irq.h> @@ -542,6 +543,25 @@ static u32 __init omap1_usb2_init(unsigned nwires, unsigned alt_pingroup) /* ULPD_APLL_CTRL */ #define APLL_NDPLL_SWITCH (1 << 0) +static int omap_1510_usb_ohci_notifier(struct notifier_block *nb, + unsigned long event, void *data) +{ + struct device *dev = data; + + if (event != BUS_NOTIFY_ADD_DEVICE) + return NOTIFY_DONE; + + if (strncmp(dev_name(dev), "ohci", 4) == 0 && + dma_direct_set_offset(dev, PHYS_OFFSET, OMAP1510_LB_OFFSET, + (u64)-1)) + WARN_ONCE(1, "failed to set DMA offset\n"); + return NOTIFY_OK; +} + +static struct notifier_block omap_1510_usb_ohci_nb = { + .notifier_call = omap_1510_usb_ohci_notifier, +}; + static void __init omap_1510_usb_init(struct omap_usb_config *config) { unsigned int val; @@ -600,6 +620,8 @@ static void __init omap_1510_usb_init(struct omap_usb_config *config) if (config->register_host) { int status; + bus_register_notifier(&platform_bus_type, + &omap_1510_usb_ohci_nb); ohci_device.dev.platform_data = config; status = platform_device_register(&ohci_device); if (status)
Switch the omap1510 platform ohci device to use dma_direct_set_offset to set the DMA offset instead of using direct hooks into the DMA mapping code and remove the now unused hooks. Signed-off-by: Christoph Hellwig <hch@lst.de> --- arch/arm/include/asm/dma-direct.h | 18 ------------- arch/arm/mach-omap1/include/mach/memory.h | 31 ----------------------- arch/arm/mach-omap1/usb.c | 22 ++++++++++++++++ 3 files changed, 22 insertions(+), 49 deletions(-)