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remoteproc: remove the single rpmsg vdev limitation

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Now that the resource table supports publishing a virtio device
in a single resource entry, firmware images can start supporting
more than a single vdev.

This patch removes the single vdev limitation of the remoteproc
framework so multi-vdev firmwares can be leveraged: VDEV resource
entries are parsed when the rproc is registered, and as a result
their vrings are set up and the virtio devices are registered
(and they go away when the rproc goes away).

Moreover, we no longer only support VIRTIO_ID_RPMSG vdevs; any
virtio device type goes now. As a result, there's no more any
rpmsg-specific APIs or code in remoteproc: it all becomes generic
virtio handling.

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 2012-02-13 22:30:39 +01:00
parent 41a6ee09ee
commit 7a18694162
5 changed files with 262 additions and 230 deletions
Download patch file Download diff file Expand all files Collapse all files

41
include/linux/remoteproc.h
View file

@ -41,6 +41,7 @@
#include <linux/mutex.h>
#include <linux/virtio.h>
#include <linux/completion.h>
#include <linux/idr.h>
/*
* The alignment between the consumer and producer parts of the vring.
@ -387,7 +388,8 @@ enum rproc_state {
* @mappings: list of iommu mappings we initiated, needed on shutdown
* @firmware_loading_complete: marks e/o asynchronous firmware loading
* @bootaddr: address of first instruction to boot rproc with (optional)
* @rvdev: virtio device (we only support a single rpmsg virtio device for now)
* @rvdevs: list of remote virtio devices
* @notifyids: idr for dynamically assigning rproc-wide unique notify ids
*/
struct rproc {
struct klist_node node;
@ -408,23 +410,47 @@ struct rproc {
struct list_head mappings;
struct completion firmware_loading_complete;
u32 bootaddr;
struct list_head rvdevs;
struct idr notifyids;
};
/* we currently support only two vrings per rvdev */
#define RVDEV_NUM_VRINGS 2
/**
* struct rproc_vring - remoteproc vring state
* @va: virtual address
* @dma: dma address
* @len: length, in bytes
* @da: device address
* @notifyid: rproc-specific unique vring index
* @rvdev: remote vdev
* @vq: the virtqueue of this vring
*/
struct rproc_vring {
void *va;
dma_addr_t dma;
int len;
u32 da;
int notifyid;
struct rproc_vdev *rvdev;
struct virtqueue *vq;
};
/**
* struct rproc_vdev - remoteproc state for a supported virtio device
* @node: list node
* @rproc: the rproc handle
* @vdev: the virio device
* @vq: the virtqueues for this vdev
* @vring: the vrings for this vdev
* @dfeatures: virtio device features
* @gfeatures: virtio guest features
*/
struct rproc_vdev {
struct list_head node;
struct rproc *rproc;
struct virtio_device vdev;
struct virtqueue *vq[2];
struct rproc_mem_entry vring[2];
struct rproc_vring vring[RVDEV_NUM_VRINGS];
unsigned long dfeatures;
unsigned long gfeatures;
};
@ -442,9 +468,14 @@ int rproc_unregister(struct rproc *rproc);
int rproc_boot(struct rproc *rproc);
void rproc_shutdown(struct rproc *rproc);
static inline struct rproc_vdev *vdev_to_rvdev(struct virtio_device *vdev)
{
return container_of(vdev, struct rproc_vdev, vdev);
}
static inline struct rproc *vdev_to_rproc(struct virtio_device *vdev)
{
struct rproc_vdev *rvdev = container_of(vdev, struct rproc_vdev, vdev);
struct rproc_vdev *rvdev = vdev_to_rvdev(vdev);
return rvdev->rproc;
}