From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ohad Ben-Cohen Subject: [PATCH 6/7] remoteproc: remove the hardcoded vring alignment Date: Thu, 1 Mar 2012 10:11:36 +0200 Message-ID: <1330589497-4139-7-git-send-email-ohad@wizery.com> References: <1330589497-4139-1-git-send-email-ohad@wizery.com> Mime-Version: 1.0 Return-path: Received: from mail-wi0-f174.google.com ([209.85.212.174]:47271 "EHLO mail-wi0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758604Ab2CAIMt (ORCPT ); Thu, 1 Mar 2012 03:12:49 -0500 Received: by mail-wi0-f174.google.com with SMTP id hm2so126965wib.19 for ; Thu, 01 Mar 2012 00:12:48 -0800 (PST) In-Reply-To: <1330589497-4139-1-git-send-email-ohad@wizery.com> Sender: linux-omap-owner@vger.kernel.org List-Id: linux-omap@vger.kernel.org To: linux-omap@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Ohad Ben-Cohen , Brian Swetland , Iliyan Malchev , Arnd Bergmann , Grant Likely , Rusty Russell , Mark Grosen , John Williams , Michal Simek , Loic PALLARDY , Ludovic BARRE , Omar Ramirez Luna , Guzman Lugo Fernando , Anna Suman , Clark Rob , Stephen Boyd , Saravana Kannan , David Brown , Kieran Bingham , Tony Lindgren 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 Cc: Brian Swetland Cc: Iliyan Malchev Cc: Arnd Bergmann Cc: Grant Likely Cc: Rusty Russell Cc: Mark Grosen Cc: John Williams Cc: Michal Simek Cc: Loic PALLARDY Cc: Ludovic BARRE Cc: Omar Ramirez Luna Cc: Guzman Lugo Fernando Cc: Anna Suman Cc: Clark Rob Cc: Stephen Boyd Cc: Saravana Kannan Cc: David Brown Cc: Kieran Bingham Cc: Tony Lindgren --- drivers/remoteproc/remoteproc_core.c | 12 +++++++----- drivers/remoteproc/remoteproc_virtio.c | 2 +- include/linux/remoteproc.h | 9 ++------- 3 files changed, 10 insertions(+), 13 deletions(-) diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c index ca02f12..9be5dad 100644 --- a/drivers/remoteproc/remoteproc_core.c +++ b/drivers/remoteproc/remoteproc_core.c @@ -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); diff --git a/drivers/remoteproc/remoteproc_virtio.c b/drivers/remoteproc/remoteproc_virtio.c index 0700410..ecf6121 100644 --- a/drivers/remoteproc/remoteproc_virtio.c +++ b/drivers/remoteproc/remoteproc_virtio.c @@ -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); diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h index 7750d8a..f1ffabb 100644 --- a/include/linux/remoteproc.h +++ b/include/linux/remoteproc.h @@ -43,13 +43,6 @@ #include #include -/* - * 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; -- 1.7.5.4