From: laurentiu.tudor@nxp.com
To: hch@lst.de, stern@rowland.harvard.edu,
gregkh@linuxfoundation.org, linux-usb@vger.kernel.org,
marex@denx.de
Cc: leoyang.li@nxp.com, linux-kernel@vger.kernel.org,
robin.murphy@arm.com, noring@nocrew.org, JuergenUrban@gmx.de,
Laurentiu Tudor <laurentiu.tudor@nxp.com>
Subject: [PATCH v4 0/3] prerequisites for device reserved local mem rework
Date: Thu, 16 May 2019 14:47:18 +0300 [thread overview]
Message-ID: <20190516114721.27694-1-laurentiu.tudor@nxp.com> (raw)
From: Laurentiu Tudor <laurentiu.tudor@nxp.com>
For HCs that have local memory, replace the current DMA API usage
with a genalloc generic allocator to manage the mappings for these
devices.
This is in preparation for dropping the existing "coherent" dma
mem declaration APIs. Current implementation was relying on a short
circuit in the DMA API that in the end, was acting as an allocator
for these type of devices.
Only compiled tested, so any volunteers willing to test are most welcome.
Thank you!
For context, see thread here: https://lkml.org/lkml/2019/4/22/357
Changes in v4:
- created mapping for local mem
- fix genalloc misuse
Changes in v3:
- rearranged calls into genalloc simplifying the code a bit (Christoph)
- dropped RFC prefix
Changes in v2:
- use genalloc also in core usb (based on comment from Robin)
- moved genpool decl to usb_hcd to be accesible from core usb
Laurentiu Tudor (3):
USB: use genalloc for USB HCs with local memory
usb: host: ohci-sm501: init genalloc for local memory
usb: host: ohci-tmio: init genalloc for local memory
drivers/usb/core/buffer.c | 15 +++++---
drivers/usb/host/ohci-hcd.c | 23 +++++++++---
drivers/usb/host/ohci-sm501.c | 66 +++++++++++++++++++++--------------
drivers/usb/host/ohci-tmio.c | 32 ++++++++++++-----
include/linux/usb/hcd.h | 3 ++
5 files changed, 95 insertions(+), 44 deletions(-)
--
2.17.1
next reply other threads:[~2019-05-16 11:47 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-16 11:47 laurentiu.tudor [this message]
2019-05-16 11:47 ` [PATCH v4 1/3] USB: use genalloc for USB HCs with local memory laurentiu.tudor
2019-05-21 8:16 ` Greg KH
2019-05-21 10:28 ` Christoph Hellwig
2019-05-21 11:04 ` Laurentiu Tudor
2019-05-21 11:15 ` Greg KH
2019-05-16 11:47 ` [PATCH v4 2/3] usb: host: ohci-sm501: init genalloc for " laurentiu.tudor
2019-05-21 10:39 ` Christoph Hellwig
2019-05-21 11:08 ` Laurentiu Tudor
2019-05-16 11:47 ` [PATCH v4 3/3] usb: host: ohci-tmio: " laurentiu.tudor
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