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remoteproc: remove the hardcoded vring alignment

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Remove the hardcoded vring alignment of 4096 bytes,
and instead utilize tha vring alignment as specified in
the resource table.

This is needed for remote processors that have rigid
memory requirement, and which have found the alignment of
4096 bytes to be excessively big.

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Cc: Brian Swetland <swetland@google.com>
Cc: Iliyan Malchev <malchev@google.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Mark Grosen <mgrosen@ti.com>
Cc: John Williams <john.williams@petalogix.com>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Loic PALLARDY <loic.pallardy@stericsson.com>
Cc: Ludovic BARRE <ludovic.barre@stericsson.com>
Cc: Omar Ramirez Luna <omar.luna@linaro.org>
Cc: Guzman Lugo Fernando <fernando.lugo@ti.com>
Cc: Anna Suman <s-anna@ti.com>
Cc: Clark Rob <rob@ti.com>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Saravana Kannan <skannan@codeaurora.org>
Cc: David Brown <davidb@codeaurora.org>
Cc: Kieran Bingham <kieranbingham@gmail.com>
Cc: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Ohad Ben-Cohen 2012-02-29 14:42:13 +02:00
parent 55f34080d9
commit 63140e0ed2
3 changed files with 10 additions and 13 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

12
drivers/remoteproc/remoteproc_core.c
View file

@ -298,14 +298,15 @@ __rproc_handle_vring(struct rproc_vdev *rvdev, struct fw_rsc_vdev *rsc, int i)
return -EINVAL;
}
/* the firmware must provide the expected queue size */
if (!vring->num) {
dev_err(dev, "invalid qsz (%d)\n", vring->num);
/* verify queue size and vring alignment are sane */
if (!vring->num || !vring->align) {
dev_err(dev, "invalid qsz (%d) or alignment (%d)\n",
vring->num, vring->align);
return -EINVAL;
}
/* actual size of vring (in bytes) */
size = PAGE_ALIGN(vring_size(vring->num, AMP_VRING_ALIGN));
size = PAGE_ALIGN(vring_size(vring->num, vring->align));
if (!idr_pre_get(&rproc->notifyids, GFP_KERNEL)) {
dev_err(dev, "idr_pre_get failed\n");
@ -340,6 +341,7 @@ __rproc_handle_vring(struct rproc_vdev *rvdev, struct fw_rsc_vdev *rsc, int i)
dma, size, notifyid);
rvdev->vring[i].len = vring->num;
rvdev->vring[i].align = vring->align;
rvdev->vring[i].va = va;
rvdev->vring[i].dma = dma;
rvdev->vring[i].notifyid = notifyid;
@ -354,7 +356,7 @@ static void __rproc_free_vrings(struct rproc_vdev *rvdev, int i)
for (i--; i > 0; i--) {
struct rproc_vring *rvring = &rvdev->vring[i];
int size = PAGE_ALIGN(vring_size(rvring->len, AMP_VRING_ALIGN));
int size = PAGE_ALIGN(vring_size(rvring->len, rvring->align));
dma_free_coherent(rproc->dev, size, rvring->va, rvring->dma);
idr_remove(&rproc->notifyids, rvring->notifyid);

2
drivers/remoteproc/remoteproc_virtio.c
View file

@ -99,7 +99,7 @@ static struct virtqueue *rp_find_vq(struct virtio_device *vdev,
* Create the new vq, and tell virtio we're not interested in
* the 'weak' smp barriers, since we're talking with a real device.
*/
vq = vring_new_virtqueue(len, AMP_VRING_ALIGN, vdev, false, addr,
vq = vring_new_virtqueue(len, rvring->align, vdev, false, addr,
rproc_virtio_notify, callback, name);
if (!vq) {
dev_err(rproc->dev, "vring_new_virtqueue %s failed\n", name);

9
include/linux/remoteproc.h
View file

@ -43,13 +43,6 @@
#include <linux/completion.h>
#include <linux/idr.h>
/*
* The alignment between the consumer and producer parts of the vring.
* Note: this is part of the "wire" protocol. If you change this, you need
* to update your peers too.
*/
#define AMP_VRING_ALIGN (4096)
/**
* struct resource_table - firmware resource table header
* @ver: version number
@ -423,6 +416,7 @@ struct rproc {
* @dma: dma address
* @len: length, in bytes
* @da: device address
* @align: vring alignment
* @notifyid: rproc-specific unique vring index
* @rvdev: remote vdev
* @vq: the virtqueue of this vring
@ -432,6 +426,7 @@ struct rproc_vring {
dma_addr_t dma;
int len;
u32 da;
u32 align;
int notifyid;
struct rproc_vdev *rvdev;
struct virtqueue *vq;