Peter Chen e48aa1eb44 usb: chipidea: udc: add software sg list support ... The chipidea controller doesn't support short transfer for sg list, so we still keep setting IOC per TD, otherwise, there will be no interrupt for short transfer. Each TD has five entries for data buffer, each data buffer could be non-countinuous 4KB buffer, so it could handle up to 5 sg buffers one time. The benefit of this patch is avoiding OOM for low memory system(eg, 256MB) during large USB transfers, see below for detail. The non-sg handling has not changed. ufb: page allocation failure: order:4, mode:0x40cc0(GFP_KERNEL|__GFP_COMP), nodemask=(null),cpuset=/,mems_allowed=0 CPU: 2 PID: 370 Comm: ufb Not tainted 5.4.3-1.1.0+g54b3750d61fd #1 Hardware name: NXP i.MX8MNano DDR4 EVK board (DT) Call trace: dump_backtrace+0x0/0x140 show_stack+0x14/0x20 dump_stack+0xb4/0xf8 warn_alloc+0xec/0x158 __alloc_pages_slowpath+0x9cc/0x9f8 __alloc_pages_nodemask+0x21c/0x280 alloc_pages_current+0x7c/0xe8 kmalloc_order+0x1c/0x88 __kmalloc+0x25c/0x298 ffs_epfile_io.isra.0+0x20c/0x7d0 ffs_epfile_read_iter+0xa8/0x188 new_sync_read+0xe4/0x170 __vfs_read+0x2c/0x40 vfs_read+0xc8/0x1a0 ksys_read+0x68/0xf0 __arm64_sys_read+0x18/0x20 el0_svc_common.constprop.0+0x68/0x160 el0_svc_handler+0x20/0x80 el0_svc+0x8/0xc Mem-Info: active_anon:2856 inactive_anon:5269 isolated_anon:12 active_file:5238 inactive_file:18803 isolated_file:0 unevictable:0 dirty:22 writeback:416 unstable:0 slab_reclaimable:4073 slab_unreclaimable:3408 mapped:727 shmem:7393 pagetables:37 bounce:0 free:4104 free_pcp:118 free_cma:0 Node 0 active_anon:11436kB inactive_anon:21076kB active_file:20988kB inactive_file:75216kB unevictable:0kB isolated(ano Node 0 DMA32 free:16820kB min:1808kB low:2260kB high:2712kB active_anon:11436kB inactive_anon:21076kB active_file:2098B lowmem_reserve[]: 0 0 0 Node 0 DMA32: 508*4kB (UME) 242*8kB (UME) 730*16kB (UM) 21*32kB (UME) 5*64kB (UME) 2*128kB (M) 0*256kB 0*512kB 0*1024kB Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=32768kB Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=64kB 31455 total pagecache pages 0 pages in swap cache Swap cache stats: add 0, delete 0, find 0/0 Free swap = 0kB Total swap = 0kB 65536 pages RAM 0 pages HighMem/MovableOnly 10766 pages reserved 0 pages cma reserved 0 pages hwpoisoned Reviewed-by: Jun Li <jun.li@nxp.com> Signed-off-by: Peter Chen <peter.chen@nxp.com>		2020-05-06 09:42:35 +08:00
..
atm	USB: atm: Use the correct style for SPDX License Identifier	2020-03-17 20:03:28 +01:00
c67x00	USB: c67x00: Use the correct style for SPDX License Identifier	2020-03-17 20:03:28 +01:00
cdns3	usb: cdns3: make signed 1 bit bitfields unsigned	2020-03-26 15:05:44 +01:00
chipidea	usb: chipidea: udc: add software sg list support	2020-05-06 09:42:35 +08:00
class	USB: cdc-acm: restore capability check order	2020-03-27 16:24:16 +01:00
common	usb: common: usb-conn-gpio: Don't log an error on probe deferral	2019-12-10 11:41:20 +01:00
core	usb: core: Add ACPI support for USB interface devices	2020-03-24 13:38:51 +01:00
dwc2	usb: dwc2: convert to devm_platform_get_and_ioremap_resource	2020-03-24 12:09:39 +01:00
dwc3	usb: dwc3: fix up for role switch API change	2020-03-16 08:23:27 +01:00
early	remove ioremap_nocache and devm_ioremap_nocache	2020-01-06 09:45:59 +01:00
gadget	usb: gadget: fsl: remove unused variable 'driver_desc'	2020-03-26 15:05:44 +01:00
host	usb: host: hisilicon: convert to devm_platform_get_and_ioremap_resource	2020-03-24 12:09:39 +01:00
image	Merge 5.4-rc3 into usb-next	2019-10-14 07:09:59 +02:00
isp1760	remove ioremap_nocache and devm_ioremap_nocache	2020-01-06 09:45:59 +01:00
misc	Merge 5.6-rc5 into usb-next	2020-03-10 08:12:46 +01:00
mon	USB: mon: Use scnprintf() for avoiding potential buffer overflow	2020-03-12 09:49:28 +01:00
mtu3	usb: roles: Provide the switch drivers handle to the switch in the API	2020-03-04 11:12:50 +01:00
musb	usb: musb: tusb6010: fix a possible missing data type replacement	2020-03-17 20:03:28 +01:00
phy	usb: phy: Add driver for the Ingenic JZ4770 USB transceiver	2020-03-12 09:53:08 +01:00
renesas_usbhs	phy: for 5.6	2020-01-17 07:52:26 +01:00
roles	usb: roles: Allow the role switches to be named	2020-03-04 11:12:50 +01:00
serial	USB-serial updates for 5.7-rc1	2020-03-26 11:15:30 +01:00
storage	Merge 5.6-rc5 into usb-next	2020-03-10 08:12:46 +01:00
typec	usb: typec: Correct the documentation for typec_cable_put()	2020-03-26 15:05:43 +01:00
usbip	usbip: Fix error path of vhci_recv_ret_submit()	2019-12-17 16:36:33 +01:00
Kconfig	usb: common: create Kconfig file	2019-09-03 19:00:39 +02:00
Makefile	USB: Changes for v5.4 merge window	2019-09-02 19:20:57 +02:00
usb-skeleton.c	USB: usb-skeleton: drop redundant in-urb check	2019-10-10 12:41:19 +02:00