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Subject[PATCH 1/2] remoteproc: maintain a generic child device for each rproc
Date
For each registered rproc, maintain a generic remoteproc device whose
parent is the low level platform-specific device (commonly a pdev, but
it may certainly be any other type of device too).

With this in hand, the resulting device hierarchy might then look like:

omap-rproc.0
|
- remoteproc.0
|
- virtio0
|
- virtio1
|
- rpmsg0
|
- rpmsg1
|
- rpmsg2
Where:
- omap-rproc.0 is the low level device that's bound to the
driver which invokes rproc_register()
- remoteproc.0 is the result of this patch, and will be added by the
remoteproc framework when rproc_register() is invoked
- virtio0 and virtio1 are vdevs that are registered by remoteproc
when it realizes that they are supported by the firmware
of the physical remote processor represented by omap-rproc.0
- rpmsg0, rpmsg1 and rpmsg2 are rpmsg devices that represent rpmsg
channels, and are registerd by the rpmsg bus when it gets notified
about their existence

Technically, this patch:
- changes 'struct rproc' to contain this generic remoteproc.x device
- creates a new "remoteproc" class, to which this new generic remoteproc.x
device belong to.
- adds a super simple enumeration method for the indices of the
remoteproc.x devices
- updates all dev_* messaging to use the generic remoteproc.x device
instead of the low level platform-specific device
- updates all dma_* allocations to use the parent of remoteproc.x (where
the platform-specific memory pools, most commonly CMA, are to be found)

Adding this generic device has several merits:
- we can now add remoteproc runtime PM support simply by hooking onto the
new "remoteproc" class
- all remoteproc log messages will now carry a common name prefix
instead of having a platform-specific one
- having a device as part of the rproc struct makes it possible to simplify
refcounting (see subsequent patch)

Thanks to Stephen Boyd <sboyd@codeaurora.org> for suggesting and
discussing these ideas in one of the remoteproc review threads and
to Fernando Guzman Lugo <fernando.lugo@ti.com> for trying them out
with the (upcoming) runtime PM support for remoteproc.

Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Fernando Guzman Lugo <fernando.lugo@ti.com>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
---
drivers/remoteproc/omap_remoteproc.c | 17 +++--
drivers/remoteproc/remoteproc_core.c | 125 ++++++++++++++++++++-----------
drivers/remoteproc/remoteproc_debugfs.c | 4 +-
drivers/remoteproc/remoteproc_virtio.c | 13 ++--
drivers/rpmsg/virtio_rpmsg_bus.c | 3 +-
include/linux/remoteproc.h | 4 +-
6 files changed, 106 insertions(+), 60 deletions(-)
diff --git a/drivers/remoteproc/omap_remoteproc.c b/drivers/remoteproc/omap_remoteproc.c
index de138e30..f45230c 100644
--- a/drivers/remoteproc/omap_remoteproc.c
+++ b/drivers/remoteproc/omap_remoteproc.c
@@ -66,7 +66,7 @@ static int omap_rproc_mbox_callback(struct notifier_block *this,
{
mbox_msg_t msg = (mbox_msg_t) data;
struct omap_rproc *oproc = container_of(this, struct omap_rproc, nb);
- struct device *dev = oproc->rproc->dev;
+ struct device *dev = oproc->rproc->dev.parent;
const char *name = oproc->rproc->name;

dev_dbg(dev, "mbox msg: 0x%x\n", msg);
@@ -92,12 +92,13 @@ static int omap_rproc_mbox_callback(struct notifier_block *this,
static void omap_rproc_kick(struct rproc *rproc, int vqid)
{
struct omap_rproc *oproc = rproc->priv;
+ struct device *dev = rproc->dev.parent;
int ret;

/* send the index of the triggered virtqueue in the mailbox payload */
ret = omap_mbox_msg_send(oproc->mbox, vqid);
if (ret)
- dev_err(rproc->dev, "omap_mbox_msg_send failed: %d\n", ret);
+ dev_err(dev, "omap_mbox_msg_send failed: %d\n", ret);
}

/*
@@ -110,7 +111,8 @@ static void omap_rproc_kick(struct rproc *rproc, int vqid)
static int omap_rproc_start(struct rproc *rproc)
{
struct omap_rproc *oproc = rproc->priv;
- struct platform_device *pdev = to_platform_device(rproc->dev);
+ struct device *dev = rproc->dev.parent;
+ struct platform_device *pdev = to_platform_device(dev);
struct omap_rproc_pdata *pdata = pdev->dev.platform_data;
int ret;

@@ -120,7 +122,7 @@ static int omap_rproc_start(struct rproc *rproc)
oproc->mbox = omap_mbox_get(pdata->mbox_name, &oproc->nb);
if (IS_ERR(oproc->mbox)) {
ret = PTR_ERR(oproc->mbox);
- dev_err(rproc->dev, "omap_mbox_get failed: %d\n", ret);
+ dev_err(dev, "omap_mbox_get failed: %d\n", ret);
return ret;
}

@@ -133,13 +135,13 @@ static int omap_rproc_start(struct rproc *rproc)
*/
ret = omap_mbox_msg_send(oproc->mbox, RP_MBOX_ECHO_REQUEST);
if (ret) {
- dev_err(rproc->dev, "omap_mbox_get failed: %d\n", ret);
+ dev_err(dev, "omap_mbox_get failed: %d\n", ret);
goto put_mbox;
}

ret = pdata->device_enable(pdev);
if (ret) {
- dev_err(rproc->dev, "omap_device_enable failed: %d\n", ret);
+ dev_err(dev, "omap_device_enable failed: %d\n", ret);
goto put_mbox;
}

@@ -153,7 +155,8 @@ put_mbox:
/* power off the remote processor */
static int omap_rproc_stop(struct rproc *rproc)
{
- struct platform_device *pdev = to_platform_device(rproc->dev);
+ struct device *dev = rproc->dev.parent;
+ struct platform_device *pdev = to_platform_device(dev);
struct omap_rproc_pdata *pdata = pdev->dev.platform_data;
struct omap_rproc *oproc = rproc->priv;
int ret;
diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index 464ea4f..9e3d4cf 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -66,6 +66,9 @@ typedef int (*rproc_handle_resources_t)(struct rproc *rproc,
struct resource_table *table, int len);
typedef int (*rproc_handle_resource_t)(struct rproc *rproc, void *, int avail);

+/* Unique numbering for remoteproc devices */
+static unsigned int dev_index;
+
/*
* This is the IOMMU fault handler we register with the IOMMU API
* (when relevant; not all remote processors access memory through
@@ -92,7 +95,7 @@ static int rproc_iommu_fault(struct iommu_domain *domain, struct device *dev,
static int rproc_enable_iommu(struct rproc *rproc)
{
struct iommu_domain *domain;
- struct device *dev = rproc->dev;
+ struct device *dev = rproc->dev.parent;
int ret;

/*
@@ -137,7 +140,7 @@ free_domain:
static void rproc_disable_iommu(struct rproc *rproc)
{
struct iommu_domain *domain = rproc->domain;
- struct device *dev = rproc->dev;
+ struct device *dev = rproc->dev.parent;

if (!domain)
return;
@@ -217,7 +220,7 @@ static void *rproc_da_to_va(struct rproc *rproc, u64 da, int len)
static int
rproc_load_segments(struct rproc *rproc, const u8 *elf_data, size_t len)
{
- struct device *dev = rproc->dev;
+ struct device *dev = &rproc->dev;
struct elf32_hdr *ehdr;
struct elf32_phdr *phdr;
int i, ret = 0;
@@ -282,7 +285,7 @@ rproc_load_segments(struct rproc *rproc, const u8 *elf_data, size_t len)
int rproc_alloc_vring(struct rproc_vdev *rvdev, int i)
{
struct rproc *rproc = rvdev->rproc;
- struct device *dev = rproc->dev;
+ struct device *dev = &rproc->dev;
struct rproc_vring *rvring = &rvdev->vring[i];
dma_addr_t dma;
void *va;
@@ -301,9 +304,9 @@ int rproc_alloc_vring(struct rproc_vdev *rvdev, int i)
* this call will also configure the IOMMU for us
* TODO: let the rproc know the da of this vring
*/
- va = dma_alloc_coherent(dev, size, &dma, GFP_KERNEL);
+ va = dma_alloc_coherent(dev->parent, size, &dma, GFP_KERNEL);
if (!va) {
- dev_err(dev, "dma_alloc_coherent failed\n");
+ dev_err(dev->parent, "dma_alloc_coherent failed\n");
return -EINVAL;
}

@@ -316,7 +319,7 @@ int rproc_alloc_vring(struct rproc_vdev *rvdev, int i)
ret = idr_get_new(&rproc->notifyids, rvring, &notifyid);
if (ret) {
dev_err(dev, "idr_get_new failed: %d\n", ret);
- dma_free_coherent(dev, size, va, dma);
+ dma_free_coherent(dev->parent, size, va, dma);
return ret;
}

@@ -334,7 +337,7 @@ static int
rproc_parse_vring(struct rproc_vdev *rvdev, struct fw_rsc_vdev *rsc, int i)
{
struct rproc *rproc = rvdev->rproc;
- struct device *dev = rproc->dev;
+ struct device *dev = &rproc->dev;
struct fw_rsc_vdev_vring *vring = &rsc->vring[i];
struct rproc_vring *rvring = &rvdev->vring[i];

@@ -366,7 +369,7 @@ void rproc_free_vring(struct rproc_vring *rvring)
int size = PAGE_ALIGN(vring_size(rvring->len, rvring->align));
struct rproc *rproc = rvring->rvdev->rproc;

- dma_free_coherent(rproc->dev, size, rvring->va, rvring->dma);
+ dma_free_coherent(rproc->dev.parent, size, rvring->va, rvring->dma);
idr_remove(&rproc->notifyids, rvring->notifyid);
}

@@ -400,14 +403,14 @@ void rproc_free_vring(struct rproc_vring *rvring)
static int rproc_handle_vdev(struct rproc *rproc, struct fw_rsc_vdev *rsc,
int avail)
{
- struct device *dev = rproc->dev;
+ struct device *dev = &rproc->dev;
struct rproc_vdev *rvdev;
int i, ret;

/* make sure resource isn't truncated */
if (sizeof(*rsc) + rsc->num_of_vrings * sizeof(struct fw_rsc_vdev_vring)
+ rsc->config_len > avail) {
- dev_err(rproc->dev, "vdev rsc is truncated\n");
+ dev_err(dev, "vdev rsc is truncated\n");
return -EINVAL;
}

@@ -476,12 +479,12 @@ static int rproc_handle_trace(struct rproc *rproc, struct fw_rsc_trace *rsc,
int avail)
{
struct rproc_mem_entry *trace;
- struct device *dev = rproc->dev;
+ struct device *dev = &rproc->dev;
void *ptr;
char name[15];

if (sizeof(*rsc) > avail) {
- dev_err(rproc->dev, "trace rsc is truncated\n");
+ dev_err(dev, "trace rsc is truncated\n");
return -EINVAL;
}

@@ -558,6 +561,7 @@ static int rproc_handle_devmem(struct rproc *rproc, struct fw_rsc_devmem *rsc,
int avail)
{
struct rproc_mem_entry *mapping;
+ struct device *dev = &rproc->dev;
int ret;

/* no point in handling this resource without a valid iommu domain */
@@ -565,25 +569,25 @@ static int rproc_handle_devmem(struct rproc *rproc, struct fw_rsc_devmem *rsc,
return -EINVAL;

if (sizeof(*rsc) > avail) {
- dev_err(rproc->dev, "devmem rsc is truncated\n");
+ dev_err(dev, "devmem rsc is truncated\n");
return -EINVAL;
}

/* make sure reserved bytes are zeroes */
if (rsc->reserved) {
- dev_err(rproc->dev, "devmem rsc has non zero reserved bytes\n");
+ dev_err(dev, "devmem rsc has non zero reserved bytes\n");
return -EINVAL;
}

mapping = kzalloc(sizeof(*mapping), GFP_KERNEL);
if (!mapping) {
- dev_err(rproc->dev, "kzalloc mapping failed\n");
+ dev_err(dev, "kzalloc mapping failed\n");
return -ENOMEM;
}

ret = iommu_map(rproc->domain, rsc->da, rsc->pa, rsc->len, rsc->flags);
if (ret) {
- dev_err(rproc->dev, "failed to map devmem: %d\n", ret);
+ dev_err(dev, "failed to map devmem: %d\n", ret);
goto out;
}

@@ -598,7 +602,7 @@ static int rproc_handle_devmem(struct rproc *rproc, struct fw_rsc_devmem *rsc,
mapping->len = rsc->len;
list_add_tail(&mapping->node, &rproc->mappings);

- dev_dbg(rproc->dev, "mapped devmem pa 0x%x, da 0x%x, len 0x%x\n",
+ dev_dbg(dev, "mapped devmem pa 0x%x, da 0x%x, len 0x%x\n",
rsc->pa, rsc->da, rsc->len);

return 0;
@@ -630,13 +634,13 @@ static int rproc_handle_carveout(struct rproc *rproc,
struct fw_rsc_carveout *rsc, int avail)
{
struct rproc_mem_entry *carveout, *mapping;
- struct device *dev = rproc->dev;
+ struct device *dev = &rproc->dev;
dma_addr_t dma;
void *va;
int ret;

if (sizeof(*rsc) > avail) {
- dev_err(rproc->dev, "carveout rsc is truncated\n");
+ dev_err(dev, "carveout rsc is truncated\n");
return -EINVAL;
}

@@ -662,9 +666,9 @@ static int rproc_handle_carveout(struct rproc *rproc,
goto free_mapping;
}

- va = dma_alloc_coherent(dev, rsc->len, &dma, GFP_KERNEL);
+ va = dma_alloc_coherent(dev->parent, rsc->len, &dma, GFP_KERNEL);
if (!va) {
- dev_err(dev, "failed to dma alloc carveout: %d\n", rsc->len);
+ dev_err(dev->parent, "dma_alloc_coherent err: %d\n", rsc->len);
ret = -ENOMEM;
goto free_carv;
}
@@ -735,7 +739,7 @@ static int rproc_handle_carveout(struct rproc *rproc,
return 0;

dma_free:
- dma_free_coherent(dev, rsc->len, va, dma);
+ dma_free_coherent(dev->parent, rsc->len, va, dma);
free_carv:
kfree(carveout);
free_mapping:
@@ -758,7 +762,7 @@ static rproc_handle_resource_t rproc_handle_rsc[] = {
static int
rproc_handle_boot_rsc(struct rproc *rproc, struct resource_table *table, int len)
{
- struct device *dev = rproc->dev;
+ struct device *dev = &rproc->dev;
rproc_handle_resource_t handler;
int ret = 0, i;

@@ -797,7 +801,7 @@ rproc_handle_boot_rsc(struct rproc *rproc, struct resource_table *table, int len
static int
rproc_handle_virtio_rsc(struct rproc *rproc, struct resource_table *table, int len)
{
- struct device *dev = rproc->dev;
+ struct device *dev = &rproc->dev;
int ret = 0, i;

for (i = 0; i < table->num; i++) {
@@ -850,7 +854,7 @@ rproc_find_rsc_table(struct rproc *rproc, const u8 *elf_data, size_t len,
struct elf32_hdr *ehdr;
struct elf32_shdr *shdr;
const char *name_table;
- struct device *dev = rproc->dev;
+ struct device *dev = &rproc->dev;
struct resource_table *table = NULL;
int i;

@@ -916,7 +920,7 @@ rproc_find_rsc_table(struct rproc *rproc, const u8 *elf_data, size_t len,
static void rproc_resource_cleanup(struct rproc *rproc)
{
struct rproc_mem_entry *entry, *tmp;
- struct device *dev = rproc->dev;
+ struct device *dev = &rproc->dev;

/* clean up debugfs trace entries */
list_for_each_entry_safe(entry, tmp, &rproc->traces, node) {
@@ -928,7 +932,7 @@ static void rproc_resource_cleanup(struct rproc *rproc)

/* clean up carveout allocations */
list_for_each_entry_safe(entry, tmp, &rproc->carveouts, node) {
- dma_free_coherent(dev, entry->len, entry->va, entry->dma);
+ dma_free_coherent(dev->parent, entry->len, entry->va, entry->dma);
list_del(&entry->node);
kfree(entry);
}
@@ -953,7 +957,7 @@ static void rproc_resource_cleanup(struct rproc *rproc)
static int rproc_fw_sanity_check(struct rproc *rproc, const struct firmware *fw)
{
const char *name = rproc->firmware;
- struct device *dev = rproc->dev;
+ struct device *dev = &rproc->dev;
struct elf32_hdr *ehdr;
char class;

@@ -1014,7 +1018,7 @@ static int rproc_fw_sanity_check(struct rproc *rproc, const struct firmware *fw)
*/
static int rproc_fw_boot(struct rproc *rproc, const struct firmware *fw)
{
- struct device *dev = rproc->dev;
+ struct device *dev = &rproc->dev;
const char *name = rproc->firmware;
struct elf32_hdr *ehdr;
struct resource_table *table;
@@ -1139,7 +1143,7 @@ int rproc_boot(struct rproc *rproc)
return -EINVAL;
}

- dev = rproc->dev;
+ dev = &rproc->dev;

/*
* if asynchronoush fw loading is underway, wait up to 65 secs
@@ -1167,7 +1171,7 @@ int rproc_boot(struct rproc *rproc)
}

/* prevent underlying implementation from being removed */
- if (!try_module_get(dev->driver->owner)) {
+ if (!try_module_get(dev->parent->driver->owner)) {
dev_err(dev, "%s: can't get owner\n", __func__);
ret = -EINVAL;
goto unlock_mutex;
@@ -1194,7 +1198,7 @@ int rproc_boot(struct rproc *rproc)

downref_rproc:
if (ret) {
- module_put(dev->driver->owner);
+ module_put(dev->parent->driver->owner);
atomic_dec(&rproc->power);
}
unlock_mutex:
@@ -1228,7 +1232,7 @@ EXPORT_SYMBOL(rproc_boot);
*/
void rproc_shutdown(struct rproc *rproc)
{
- struct device *dev = rproc->dev;
+ struct device *dev = &rproc->dev;
int ret;

ret = mutex_lock_interruptible(&rproc->lock);
@@ -1261,7 +1265,7 @@ void rproc_shutdown(struct rproc *rproc)
out:
mutex_unlock(&rproc->lock);
if (!ret)
- module_put(dev->driver->owner);
+ module_put(dev->parent->driver->owner);
}
EXPORT_SYMBOL(rproc_shutdown);

@@ -1284,7 +1288,7 @@ void rproc_release(struct kref *kref)
{
struct rproc *rproc = container_of(kref, struct rproc, refcount);

- dev_info(rproc->dev, "removing %s\n", rproc->name);
+ dev_info(&rproc->dev, "removing %s\n", rproc->name);

rproc_delete_debug_dir(rproc);

@@ -1416,13 +1420,17 @@ EXPORT_SYMBOL(rproc_put);
*/
int rproc_register(struct rproc *rproc)
{
- struct device *dev = rproc->dev;
+ struct device *dev = &rproc->dev;
int ret = 0;

+ ret = device_add(dev);
+ if (ret < 0)
+ return ret;
+
/* expose to rproc_get_by_name users */
klist_add_tail(&rproc->node, &rprocs);

- dev_info(rproc->dev, "%s is available\n", rproc->name);
+ dev_info(dev, "%s is available\n", rproc->name);

dev_info(dev, "Note: remoteproc is still under development and considered experimental.\n");
dev_info(dev, "THE BINARY FORMAT IS NOT YET FINALIZED, and backward compatibility isn't yet guaranteed.\n");
@@ -1454,6 +1462,22 @@ int rproc_register(struct rproc *rproc)
}
EXPORT_SYMBOL(rproc_register);

+static void rproc_class_release(struct device *dev)
+{
+ struct rproc *rproc = container_of(dev, struct rproc, dev);
+
+ idr_remove_all(&rproc->notifyids);
+ idr_destroy(&rproc->notifyids);
+
+ kfree(rproc);
+}
+
+static struct class rproc_class = {
+ .name = "remoteproc",
+ .owner = THIS_MODULE,
+ .dev_release = rproc_class_release,
+};
+
/**
* rproc_alloc() - allocate a remote processor handle
* @dev: the underlying device
@@ -1492,12 +1516,19 @@ struct rproc *rproc_alloc(struct device *dev, const char *name,
return NULL;
}

- rproc->dev = dev;
rproc->name = name;
rproc->ops = ops;
rproc->firmware = firmware;
rproc->priv = &rproc[1];

+ device_initialize(&rproc->dev);
+ rproc->dev.parent = dev;
+ rproc->dev.class = &rproc_class;
+
+ /* Assign a unique device index and name */
+ rproc->index = dev_index++;
+ dev_set_name(&rproc->dev, "remoteproc%d", rproc->index);
+
atomic_set(&rproc->power, 0);

kref_init(&rproc->refcount);
@@ -1529,10 +1560,7 @@ EXPORT_SYMBOL(rproc_alloc);
*/
void rproc_free(struct rproc *rproc)
{
- idr_remove_all(&rproc->notifyids);
- idr_destroy(&rproc->notifyids);
-
- kfree(rproc);
+ put_device(&rproc->dev);
}
EXPORT_SYMBOL(rproc_free);

@@ -1573,6 +1601,8 @@ int rproc_unregister(struct rproc *rproc)
/* the rproc is downref'ed as soon as it's removed from the klist */
klist_del(&rproc->node);

+ device_del(&rproc->dev);
+
/* the rproc will only be released after its refcount drops to zero */
kref_put(&rproc->refcount, rproc_release);

@@ -1582,7 +1612,14 @@ EXPORT_SYMBOL(rproc_unregister);

static int __init remoteproc_init(void)
{
+ int ret;
+
+ ret = class_register(&rproc_class);
+ if (ret)
+ return ret;
+
rproc_init_debugfs();
+
return 0;
}
module_init(remoteproc_init);
@@ -1590,6 +1627,8 @@ module_init(remoteproc_init);
static void __exit remoteproc_exit(void)
{
rproc_exit_debugfs();
+
+ class_unregister(&rproc_class);
}
module_exit(remoteproc_exit);

diff --git a/drivers/remoteproc/remoteproc_debugfs.c b/drivers/remoteproc/remoteproc_debugfs.c
index 85d31a6..0383385 100644
--- a/drivers/remoteproc/remoteproc_debugfs.c
+++ b/drivers/remoteproc/remoteproc_debugfs.c
@@ -124,7 +124,7 @@ struct dentry *rproc_create_trace_file(const char *name, struct rproc *rproc,
tfile = debugfs_create_file(name, 0400, rproc->dbg_dir,
trace, &trace_rproc_ops);
if (!tfile) {
- dev_err(rproc->dev, "failed to create debugfs trace entry\n");
+ dev_err(&rproc->dev, "failed to create debugfs trace entry\n");
return NULL;
}

@@ -141,7 +141,7 @@ void rproc_delete_debug_dir(struct rproc *rproc)

void rproc_create_debug_dir(struct rproc *rproc)
{
- struct device *dev = rproc->dev;
+ struct device *dev = &rproc->dev;

if (!rproc_dbg)
return;
diff --git a/drivers/remoteproc/remoteproc_virtio.c b/drivers/remoteproc/remoteproc_virtio.c
index 26a7144..b662183 100644
--- a/drivers/remoteproc/remoteproc_virtio.c
+++ b/drivers/remoteproc/remoteproc_virtio.c
@@ -36,7 +36,7 @@ static void rproc_virtio_notify(struct virtqueue *vq)
struct rproc *rproc = rvring->rvdev->rproc;
int notifyid = rvring->notifyid;

- dev_dbg(rproc->dev, "kicking vq index: %d\n", notifyid);
+ dev_dbg(&rproc->dev, "kicking vq index: %d\n", notifyid);

rproc->ops->kick(rproc, notifyid);
}
@@ -57,7 +57,7 @@ irqreturn_t rproc_vq_interrupt(struct rproc *rproc, int notifyid)
{
struct rproc_vring *rvring;

- dev_dbg(rproc->dev, "vq index %d is interrupted\n", notifyid);
+ dev_dbg(&rproc->dev, "vq index %d is interrupted\n", notifyid);

rvring = idr_find(&rproc->notifyids, notifyid);
if (!rvring || !rvring->vq)
@@ -74,6 +74,7 @@ static struct virtqueue *rp_find_vq(struct virtio_device *vdev,
{
struct rproc_vdev *rvdev = vdev_to_rvdev(vdev);
struct rproc *rproc = vdev_to_rproc(vdev);
+ struct device *dev = &rproc->dev;
struct rproc_vring *rvring;
struct virtqueue *vq;
void *addr;
@@ -95,7 +96,7 @@ static struct virtqueue *rp_find_vq(struct virtio_device *vdev,
size = vring_size(len, rvring->align);
memset(addr, 0, size);

- dev_dbg(rproc->dev, "vring%d: va %p qsz %d notifyid %d\n",
+ dev_dbg(dev, "vring%d: va %p qsz %d notifyid %d\n",
id, addr, len, rvring->notifyid);

/*
@@ -105,7 +106,7 @@ static struct virtqueue *rp_find_vq(struct virtio_device *vdev,
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);
+ dev_err(dev, "vring_new_virtqueue %s failed\n", name);
rproc_free_vring(rvring);
return ERR_PTR(-ENOMEM);
}
@@ -152,7 +153,7 @@ static int rproc_virtio_find_vqs(struct virtio_device *vdev, unsigned nvqs,
/* now that the vqs are all set, boot the remote processor */
ret = rproc_boot(rproc);
if (ret) {
- dev_err(rproc->dev, "rproc_boot() failed %d\n", ret);
+ dev_err(&rproc->dev, "rproc_boot() failed %d\n", ret);
goto error;
}

@@ -254,7 +255,7 @@ static void rproc_vdev_release(struct device *dev)
int rproc_add_virtio_dev(struct rproc_vdev *rvdev, int id)
{
struct rproc *rproc = rvdev->rproc;
- struct device *dev = rproc->dev;
+ struct device *dev = &rproc->dev;
struct virtio_device *vdev = &rvdev->vdev;
int ret;

diff --git a/drivers/rpmsg/virtio_rpmsg_bus.c b/drivers/rpmsg/virtio_rpmsg_bus.c
index d5572e8..0af7fd3 100644
--- a/drivers/rpmsg/virtio_rpmsg_bus.c
+++ b/drivers/rpmsg/virtio_rpmsg_bus.c
@@ -964,7 +964,8 @@ static int rpmsg_probe(struct virtio_device *vdev)
vrp->svq = vqs[1];

/* allocate coherent memory for the buffers */
- bufs_va = dma_alloc_coherent(vdev->dev.parent, RPMSG_TOTAL_BUF_SPACE,
+ bufs_va = dma_alloc_coherent(vdev->dev.parent->parent,
+ RPMSG_TOTAL_BUF_SPACE,
&vrp->bufs_dma, GFP_KERNEL);
if (!bufs_va)
goto vqs_del;
diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
index f1ffabb..0b835d3 100644
--- a/include/linux/remoteproc.h
+++ b/include/linux/remoteproc.h
@@ -383,6 +383,7 @@ enum rproc_state {
* @bootaddr: address of first instruction to boot rproc with (optional)
* @rvdevs: list of remote virtio devices
* @notifyids: idr for dynamically assigning rproc-wide unique notify ids
+ * @index: index of this rproc device
*/
struct rproc {
struct klist_node node;
@@ -391,7 +392,7 @@ struct rproc {
const char *firmware;
void *priv;
const struct rproc_ops *ops;
- struct device *dev;
+ struct device dev;
struct kref refcount;
atomic_t power;
unsigned int state;
@@ -405,6 +406,7 @@ struct rproc {
u32 bootaddr;
struct list_head rvdevs;
struct idr notifyids;
+ int index;
};

/* we currently support only two vrings per rvdev */
--
1.7.5.4


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  Last update: 2012-05-26 10:21    [from the cache]
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