diff --git a/drivers/usb/Kconfig b/drivers/usb/Kconfig index 70e6c956c23cefe12e37ee0bbb8fa7617088dd8c..2b3a76eaa65308c6aa365fccb476cc1805249730 100644 --- a/drivers/usb/Kconfig +++ b/drivers/usb/Kconfig @@ -44,6 +44,7 @@ config USB_ARCH_HAS_HCD config USB tristate "Support for Host-side USB" depends on USB_ARCH_HAS_HCD + select GENERIC_ALLOCATOR select USB_COMMON select NLS # for UTF-8 strings ---help--- diff --git a/drivers/usb/core/buffer.c b/drivers/usb/core/buffer.c index 77eef8acff94e89311d9d549f046029bd4659a9b..a9392b63c1756c65f54ef4bd08a19b91e4859049 100644 --- a/drivers/usb/core/buffer.c +++ b/drivers/usb/core/buffer.c @@ -16,6 +16,7 @@ #include #include #include +#include #include #include @@ -128,6 +129,9 @@ void *hcd_buffer_alloc( if (size == 0) return NULL; + if (hcd->localmem_pool) + return gen_pool_dma_alloc(hcd->localmem_pool, size, dma); + /* some USB hosts just use PIO */ if (!IS_ENABLED(CONFIG_HAS_DMA) || (!is_device_dma_capable(bus->sysdev) && @@ -156,6 +160,11 @@ void hcd_buffer_free( if (!addr) return; + if (hcd->localmem_pool) { + gen_pool_free(hcd->localmem_pool, (unsigned long)addr, size); + return; + } + if (!IS_ENABLED(CONFIG_HAS_DMA) || (!is_device_dma_capable(bus->sysdev) && !(hcd->driver->flags & HCD_LOCAL_MEM))) { diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c index b82a7d787add8cb9b38caa3b19bc4ed46d17c631..c1daf3f646d69095259953f1c6aee0531713d18d 100644 --- a/drivers/usb/core/hcd.c +++ b/drivers/usb/core/hcd.c @@ -29,6 +29,8 @@ #include #include #include +#include +#include #include #include @@ -3025,6 +3027,40 @@ usb_hcd_platform_shutdown(struct platform_device *dev) } EXPORT_SYMBOL_GPL(usb_hcd_platform_shutdown); +int usb_hcd_setup_local_mem(struct usb_hcd *hcd, phys_addr_t phys_addr, + dma_addr_t dma, size_t size) +{ + int err; + void *local_mem; + + hcd->localmem_pool = devm_gen_pool_create(hcd->self.sysdev, PAGE_SHIFT, + dev_to_node(hcd->self.sysdev), + dev_name(hcd->self.sysdev)); + if (IS_ERR(hcd->localmem_pool)) + return PTR_ERR(hcd->localmem_pool); + + local_mem = devm_memremap(hcd->self.sysdev, phys_addr, + size, MEMREMAP_WC); + if (!local_mem) + return -ENOMEM; + + /* + * Here we pass a dma_addr_t but the arg type is a phys_addr_t. + * It's not backed by system memory and thus there's no kernel mapping + * for it. + */ + err = gen_pool_add_virt(hcd->localmem_pool, (unsigned long)local_mem, + dma, size, dev_to_node(hcd->self.sysdev)); + if (err < 0) { + dev_err(hcd->self.sysdev, "gen_pool_add_virt failed with %d\n", + err); + return err; + } + + return 0; +} +EXPORT_SYMBOL_GPL(usb_hcd_setup_local_mem); + /*-------------------------------------------------------------------------*/ #if IS_ENABLED(CONFIG_USB_MON) diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c index af11887f5f9e4b9619534b431d684f50099b2664..9b2d8b84ae26386843b2a08b6a26f9c93d286203 100644 --- a/drivers/usb/host/ohci-hcd.c +++ b/drivers/usb/host/ohci-hcd.c @@ -40,6 +40,7 @@ #include #include #include +#include #include #include @@ -514,8 +515,15 @@ static int ohci_init (struct ohci_hcd *ohci) timer_setup(&ohci->io_watchdog, io_watchdog_func, 0); ohci->prev_frame_no = IO_WATCHDOG_OFF; - ohci->hcca = dma_alloc_coherent (hcd->self.controller, - sizeof(*ohci->hcca), &ohci->hcca_dma, GFP_KERNEL); + if (hcd->localmem_pool) + ohci->hcca = gen_pool_dma_alloc(hcd->localmem_pool, + sizeof(*ohci->hcca), + &ohci->hcca_dma); + else + ohci->hcca = dma_alloc_coherent(hcd->self.controller, + sizeof(*ohci->hcca), + &ohci->hcca_dma, + GFP_KERNEL); if (!ohci->hcca) return -ENOMEM; @@ -999,9 +1007,14 @@ static void ohci_stop (struct usb_hcd *hcd) remove_debug_files (ohci); ohci_mem_cleanup (ohci); if (ohci->hcca) { - dma_free_coherent (hcd->self.controller, - sizeof *ohci->hcca, - ohci->hcca, ohci->hcca_dma); + if (hcd->localmem_pool) + gen_pool_free(hcd->localmem_pool, + (unsigned long)ohci->hcca, + sizeof(*ohci->hcca)); + else + dma_free_coherent(hcd->self.controller, + sizeof(*ohci->hcca), + ohci->hcca, ohci->hcca_dma); ohci->hcca = NULL; ohci->hcca_dma = 0; } diff --git a/drivers/usb/host/ohci-mem.c b/drivers/usb/host/ohci-mem.c index b3da3f12e5b1ba63a7898712bde72292eda5c265..8e15044be14cc10d865cc801b5c6455fab8b9273 100644 --- a/drivers/usb/host/ohci-mem.c +++ b/drivers/usb/host/ohci-mem.c @@ -36,6 +36,13 @@ static void ohci_hcd_init (struct ohci_hcd *ohci) static int ohci_mem_init (struct ohci_hcd *ohci) { + /* + * HCs with local memory allocate from localmem_pool so there's + * no need to create the below dma pools. + */ + if (ohci_to_hcd(ohci)->localmem_pool) + return 0; + ohci->td_cache = dma_pool_create ("ohci_td", ohci_to_hcd(ohci)->self.controller, sizeof (struct td), @@ -88,8 +95,12 @@ td_alloc (struct ohci_hcd *hc, gfp_t mem_flags) { dma_addr_t dma; struct td *td; + struct usb_hcd *hcd = ohci_to_hcd(hc); - td = dma_pool_zalloc (hc->td_cache, mem_flags, &dma); + if (hcd->localmem_pool) + td = gen_pool_dma_zalloc(hcd->localmem_pool, sizeof(*td), &dma); + else + td = dma_pool_zalloc(hc->td_cache, mem_flags, &dma); if (td) { /* in case hc fetches it, make it look dead */ td->hwNextTD = cpu_to_hc32 (hc, dma); @@ -103,6 +114,7 @@ static void td_free (struct ohci_hcd *hc, struct td *td) { struct td **prev = &hc->td_hash [TD_HASH_FUNC (td->td_dma)]; + struct usb_hcd *hcd = ohci_to_hcd(hc); while (*prev && *prev != td) prev = &(*prev)->td_hash; @@ -110,7 +122,12 @@ td_free (struct ohci_hcd *hc, struct td *td) *prev = td->td_hash; else if ((td->hwINFO & cpu_to_hc32(hc, TD_DONE)) != 0) ohci_dbg (hc, "no hash for td %p\n", td); - dma_pool_free (hc->td_cache, td, td->td_dma); + + if (hcd->localmem_pool) + gen_pool_free(hcd->localmem_pool, (unsigned long)td, + sizeof(*td)); + else + dma_pool_free(hc->td_cache, td, td->td_dma); } /*-------------------------------------------------------------------------*/ @@ -121,8 +138,12 @@ ed_alloc (struct ohci_hcd *hc, gfp_t mem_flags) { dma_addr_t dma; struct ed *ed; + struct usb_hcd *hcd = ohci_to_hcd(hc); - ed = dma_pool_zalloc (hc->ed_cache, mem_flags, &dma); + if (hcd->localmem_pool) + ed = gen_pool_dma_zalloc(hcd->localmem_pool, sizeof(*ed), &dma); + else + ed = dma_pool_zalloc(hc->ed_cache, mem_flags, &dma); if (ed) { INIT_LIST_HEAD (&ed->td_list); ed->dma = dma; @@ -133,6 +154,12 @@ ed_alloc (struct ohci_hcd *hc, gfp_t mem_flags) static void ed_free (struct ohci_hcd *hc, struct ed *ed) { - dma_pool_free (hc->ed_cache, ed, ed->dma); + struct usb_hcd *hcd = ohci_to_hcd(hc); + + if (hcd->localmem_pool) + gen_pool_free(hcd->localmem_pool, (unsigned long)ed, + sizeof(*ed)); + else + dma_pool_free(hc->ed_cache, ed, ed->dma); } diff --git a/drivers/usb/host/ohci.h b/drivers/usb/host/ohci.h index ef4813bfc5bf1c775162672563a9648bbbc1fc5a..b015b00774b217c2e42b27920e34c25485615ddc 100644 --- a/drivers/usb/host/ohci.h +++ b/drivers/usb/host/ohci.h @@ -385,6 +385,8 @@ struct ohci_hcd { /* * memory management for queue data structures + * + * @td_cache and @ed_cache are %NULL if &usb_hcd.localmem_pool is used. */ struct dma_pool *td_cache; struct dma_pool *ed_cache; diff --git a/include/linux/usb/hcd.h b/include/linux/usb/hcd.h index 97e2ddec18b1a6924489b9de7770706c5d7dd02d..5f1d57064cc0149323a6b2cba5db343ee7d7a4bb 100644 --- a/include/linux/usb/hcd.h +++ b/include/linux/usb/hcd.h @@ -211,6 +211,9 @@ struct usb_hcd { #define HC_IS_RUNNING(state) ((state) & __ACTIVE) #define HC_IS_SUSPENDED(state) ((state) & __SUSPEND) + /* memory pool for HCs having local memory, or %NULL */ + struct gen_pool *localmem_pool; + /* more shared queuing code would be good; it should support * smarter scheduling, handle transaction translators, etc; * input size of periodic table to an interrupt scheduler. @@ -461,6 +464,8 @@ extern int usb_add_hcd(struct usb_hcd *hcd, unsigned int irqnum, unsigned long irqflags); extern void usb_remove_hcd(struct usb_hcd *hcd); extern int usb_hcd_find_raw_port_number(struct usb_hcd *hcd, int port1); +int usb_hcd_setup_local_mem(struct usb_hcd *hcd, phys_addr_t phys_addr, + dma_addr_t dma, size_t size); struct platform_device; extern void usb_hcd_platform_shutdown(struct platform_device *dev);