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remoteproc: Move rproc_vdev management to remoteproc_virtio.c 

Move functions related to the management of the rproc_vdev
structure in the remoteproc_virtio.c.
The aim is to decorrelate as possible the virtio management from
the core part.

Due to the strong correlation between the vrings and the resource table
the rproc_alloc/parse/free_vring functions are kept in the remoteproc core.

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
Link: https://lore.kernel.org/r/20220921135044.917140-4-arnaud.pouliquen@foss.st.com
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
This commit is contained in:
Arnaud Pouliquen 2022-09-21 15:50:43 +02:00 committed by Mathieu Poirier
parent 63badba945
commit 9c31255ce5
3 changed files with 161 additions and 160 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

157
drivers/remoteproc/remoteproc_core.c
View File

@ -23,9 +23,7 @@
#include <linux/panic_notifier.h>
#include <linux/slab.h>
#include <linux/mutex.h>
#include <linux/dma-map-ops.h>
#include <linux/dma-mapping.h>
#include <linux/dma-direct.h> /* XXX: pokes into bus_dma_range */
#include <linux/firmware.h>
#include <linux/string.h>
#include <linux/debugfs.h>
@ -384,7 +382,7 @@ int rproc_alloc_vring(struct rproc_vdev *rvdev, int i)
return 0;
}
static int
int
rproc_parse_vring(struct rproc_vdev *rvdev, struct fw_rsc_vdev *rsc, int i)
{
struct rproc *rproc = rvdev->rproc;
@ -435,166 +433,17 @@ void rproc_free_vring(struct rproc_vring *rvring)
}
}
static int rproc_vdev_do_start(struct rproc_subdev *subdev)
{
struct rproc_vdev *rvdev = container_of(subdev, struct rproc_vdev, subdev);
return rproc_add_virtio_dev(rvdev, rvdev->id);
}
static void rproc_vdev_do_stop(struct rproc_subdev *subdev, bool crashed)
{
struct rproc_vdev *rvdev = container_of(subdev, struct rproc_vdev, subdev);
int ret;
ret = device_for_each_child(&rvdev->dev, NULL, rproc_remove_virtio_dev);
if (ret)
dev_warn(&rvdev->dev, "can't remove vdev child device: %d\n", ret);
}
/**
* rproc_rvdev_release() - release the existence of a rvdev
*
* @dev: the subdevice's dev
*/
static void rproc_rvdev_release(struct device *dev)
{
struct rproc_vdev *rvdev = container_of(dev, struct rproc_vdev, dev);
of_reserved_mem_device_release(dev);
dma_release_coherent_memory(dev);
kfree(rvdev);
}
static int copy_dma_range_map(struct device *to, struct device *from)
{
const struct bus_dma_region *map = from->dma_range_map, *new_map, *r;
int num_ranges = 0;
if (!map)
return 0;
for (r = map; r->size; r++)
num_ranges++;
new_map = kmemdup(map, array_size(num_ranges + 1, sizeof(*map)),
GFP_KERNEL);
if (!new_map)
return -ENOMEM;
to->dma_range_map = new_map;
return 0;
}
static void rproc_add_rvdev(struct rproc *rproc, struct rproc_vdev *rvdev)
void rproc_add_rvdev(struct rproc *rproc, struct rproc_vdev *rvdev)
{
if (rvdev && rproc)
list_add_tail(&rvdev->node, &rproc->rvdevs);
}
static void rproc_remove_rvdev(struct rproc_vdev *rvdev)
void rproc_remove_rvdev(struct rproc_vdev *rvdev)
{
if (rvdev)
list_del(&rvdev->node);
}
static struct rproc_vdev *
rproc_rvdev_add_device(struct rproc *rproc, struct rproc_vdev_data *rvdev_data)
{
struct rproc_vdev *rvdev;
struct fw_rsc_vdev *rsc = rvdev_data->rsc;
char name[16];
int i, ret;
rvdev = kzalloc(sizeof(*rvdev), GFP_KERNEL);
if (!rvdev)
return ERR_PTR(-ENOMEM);
kref_init(&rvdev->refcount);
rvdev->id = rvdev_data->id;
rvdev->rproc = rproc;
rvdev->index = rvdev_data->index;
/* Initialise vdev subdevice */
snprintf(name, sizeof(name), "vdev%dbuffer", rvdev->index);
rvdev->dev.parent = &rproc->dev;
rvdev->dev.release = rproc_rvdev_release;
dev_set_name(&rvdev->dev, "%s#%s", dev_name(rvdev->dev.parent), name);
dev_set_drvdata(&rvdev->dev, rvdev);
ret = device_register(&rvdev->dev);
if (ret) {
put_device(&rvdev->dev);
return ERR_PTR(ret);
}
ret = copy_dma_range_map(&rvdev->dev, rproc->dev.parent);
if (ret)
goto free_rvdev;
/* Make device dma capable by inheriting from parent's capabilities */
set_dma_ops(&rvdev->dev, get_dma_ops(rproc->dev.parent));
ret = dma_coerce_mask_and_coherent(&rvdev->dev,
dma_get_mask(rproc->dev.parent));
if (ret) {
dev_warn(&rvdev->dev,
"Failed to set DMA mask %llx. Trying to continue... (%pe)\n",
dma_get_mask(rproc->dev.parent), ERR_PTR(ret));
}
/* parse the vrings */
for (i = 0; i < rsc->num_of_vrings; i++) {
ret = rproc_parse_vring(rvdev, rsc, i);
if (ret)
goto free_rvdev;
}
/* remember the resource offset*/
rvdev->rsc_offset = rvdev_data->rsc_offset;
/* allocate the vring resources */
for (i = 0; i < rsc->num_of_vrings; i++) {
ret = rproc_alloc_vring(rvdev, i);
if (ret)
goto unwind_vring_allocations;
}
rproc_add_rvdev(rproc, rvdev);
rvdev->subdev.start = rproc_vdev_do_start;
rvdev->subdev.stop = rproc_vdev_do_stop;
rproc_add_subdev(rproc, &rvdev->subdev);
return rvdev;
unwind_vring_allocations:
for (i--; i >= 0; i--)
rproc_free_vring(&rvdev->vring[i]);
free_rvdev:
device_unregister(&rvdev->dev);
return ERR_PTR(ret);
}
void rproc_vdev_release(struct kref *ref)
{
struct rproc_vdev *rvdev = container_of(ref, struct rproc_vdev, refcount);
struct rproc_vring *rvring;
struct rproc *rproc = rvdev->rproc;
int id;
for (id = 0; id < ARRAY_SIZE(rvdev->vring); id++) {
rvring = &rvdev->vring[id];
rproc_free_vring(rvring);
}
rproc_remove_subdev(rproc, &rvdev->subdev);
rproc_remove_rvdev(rvdev);
device_unregister(&rvdev->dev);
}
/**
* rproc_handle_vdev() - handle a vdev fw resource
* @rproc: the remote processor

10
drivers/remoteproc/remoteproc_internal.h
View File

@ -41,14 +41,13 @@ struct rproc_vdev_data {
/* from remoteproc_core.c */
void rproc_release(struct kref *kref);
irqreturn_t rproc_vq_interrupt(struct rproc *rproc, int vq_id);
void rproc_vdev_release(struct kref *ref);
int rproc_of_parse_firmware(struct device *dev, int index,
const char **fw_name);
/* from remoteproc_virtio.c */
int rproc_add_virtio_dev(struct rproc_vdev *rvdev, int id);
int rproc_remove_virtio_dev(struct device *dev, void *data);
struct rproc_vdev *rproc_rvdev_add_device(struct rproc *rproc, struct rproc_vdev_data *rvdev_data);
irqreturn_t rproc_vq_interrupt(struct rproc *rproc, int vq_id);
void rproc_vdev_release(struct kref *ref);
/* from remoteproc_debugfs.c */
void rproc_remove_trace_file(struct dentry *tfile);
@ -98,6 +97,7 @@ static inline void rproc_char_device_remove(struct rproc *rproc)
void rproc_free_vring(struct rproc_vring *rvring);
int rproc_alloc_vring(struct rproc_vdev *rvdev, int i);
int rproc_parse_vring(struct rproc_vdev *rvdev, struct fw_rsc_vdev *rsc, int i);
phys_addr_t rproc_va_to_pa(void *cpu_addr);
int rproc_trigger_recovery(struct rproc *rproc);
@ -110,6 +110,8 @@ struct resource_table *rproc_elf_find_loaded_rsc_table(struct rproc *rproc,
const struct firmware *fw);
struct rproc_mem_entry *
rproc_find_carveout_by_name(struct rproc *rproc, const char *name, ...);
void rproc_add_rvdev(struct rproc *rproc, struct rproc_vdev *rvdev);
void rproc_remove_rvdev(struct rproc_vdev *rvdev);
static inline int rproc_prepare_device(struct rproc *rproc)
{

154
drivers/remoteproc/remoteproc_virtio.c
View File

@ -9,7 +9,9 @@
* Brian Swetland <swetland@google.com>
*/
#include <linux/dma-direct.h>
#include <linux/dma-map-ops.h>
#include <linux/dma-mapping.h>
#include <linux/export.h>
#include <linux/of_reserved_mem.h>
#include <linux/remoteproc.h>
@ -23,6 +25,25 @@
#include "remoteproc_internal.h"
static int copy_dma_range_map(struct device *to, struct device *from)
{
const struct bus_dma_region *map = from->dma_range_map, *new_map, *r;
int num_ranges = 0;
if (!map)
return 0;
for (r = map; r->size; r++)
num_ranges++;
new_map = kmemdup(map, array_size(num_ranges + 1, sizeof(*map)),
GFP_KERNEL);
if (!new_map)
return -ENOMEM;
to->dma_range_map = new_map;
return 0;
}
static struct rproc_vdev *vdev_to_rvdev(struct virtio_device *vdev)
{
return container_of(vdev->dev.parent, struct rproc_vdev, dev);
@ -341,7 +362,7 @@ static void rproc_virtio_dev_release(struct device *dev)
*
* Return: 0 on success or an appropriate error value otherwise
*/
int rproc_add_virtio_dev(struct rproc_vdev *rvdev, int id)
static int rproc_add_virtio_dev(struct rproc_vdev *rvdev, int id)
{
struct rproc *rproc = rvdev->rproc;
struct device *dev = &rvdev->dev;
@ -449,10 +470,139 @@ out:
*
* Return: 0
*/
int rproc_remove_virtio_dev(struct device *dev, void *data)
static int rproc_remove_virtio_dev(struct device *dev, void *data)
{
struct virtio_device *vdev = dev_to_virtio(dev);
unregister_virtio_device(vdev);
return 0;
}
static int rproc_vdev_do_start(struct rproc_subdev *subdev)
{
struct rproc_vdev *rvdev = container_of(subdev, struct rproc_vdev, subdev);
return rproc_add_virtio_dev(rvdev, rvdev->id);
}
static void rproc_vdev_do_stop(struct rproc_subdev *subdev, bool crashed)
{
struct rproc_vdev *rvdev = container_of(subdev, struct rproc_vdev, subdev);
int ret;
ret = device_for_each_child(&rvdev->dev, NULL, rproc_remove_virtio_dev);
if (ret)
dev_warn(&rvdev->dev, "can't remove vdev child device: %d\n", ret);
}
/**
* rproc_rvdev_release() - release the existence of a rvdev
*
* @dev: the subdevice's dev
*/
static void rproc_rvdev_release(struct device *dev)
{
struct rproc_vdev *rvdev = container_of(dev, struct rproc_vdev, dev);
of_reserved_mem_device_release(dev);
dma_release_coherent_memory(dev);
kfree(rvdev);
}
struct rproc_vdev *
rproc_rvdev_add_device(struct rproc *rproc, struct rproc_vdev_data *rvdev_data)
{
struct rproc_vdev *rvdev;
struct fw_rsc_vdev *rsc = rvdev_data->rsc;
char name[16];
int i, ret;
rvdev = kzalloc(sizeof(*rvdev), GFP_KERNEL);
if (!rvdev)
return ERR_PTR(-ENOMEM);
kref_init(&rvdev->refcount);
rvdev->id = rvdev_data->id;
rvdev->rproc = rproc;
rvdev->index = rvdev_data->index;
/* Initialise vdev subdevice */
snprintf(name, sizeof(name), "vdev%dbuffer", rvdev->index);
rvdev->dev.parent = &rproc->dev;
rvdev->dev.release = rproc_rvdev_release;
dev_set_name(&rvdev->dev, "%s#%s", dev_name(rvdev->dev.parent), name);
dev_set_drvdata(&rvdev->dev, rvdev);
ret = device_register(&rvdev->dev);
if (ret) {
put_device(&rvdev->dev);
return ERR_PTR(ret);
}
ret = copy_dma_range_map(&rvdev->dev, rproc->dev.parent);
if (ret)
goto free_rvdev;
/* Make device dma capable by inheriting from parent's capabilities */
set_dma_ops(&rvdev->dev, get_dma_ops(rproc->dev.parent));
ret = dma_coerce_mask_and_coherent(&rvdev->dev,
dma_get_mask(rproc->dev.parent));
if (ret) {
dev_warn(&rvdev->dev,
"Failed to set DMA mask %llx. Trying to continue... (%pe)\n",
dma_get_mask(rproc->dev.parent), ERR_PTR(ret));
}
/* parse the vrings */
for (i = 0; i < rsc->num_of_vrings; i++) {
ret = rproc_parse_vring(rvdev, rsc, i);
if (ret)
goto free_rvdev;
}
/* remember the resource offset*/
rvdev->rsc_offset = rvdev_data->rsc_offset;
/* allocate the vring resources */
for (i = 0; i < rsc->num_of_vrings; i++) {
ret = rproc_alloc_vring(rvdev, i);
if (ret)
goto unwind_vring_allocations;
}
rproc_add_rvdev(rproc, rvdev);
rvdev->subdev.start = rproc_vdev_do_start;
rvdev->subdev.stop = rproc_vdev_do_stop;
rproc_add_subdev(rproc, &rvdev->subdev);
return rvdev;
unwind_vring_allocations:
for (i--; i >= 0; i--)
rproc_free_vring(&rvdev->vring[i]);
free_rvdev:
device_unregister(&rvdev->dev);
return ERR_PTR(ret);
}
void rproc_vdev_release(struct kref *ref)
{
struct rproc_vdev *rvdev = container_of(ref, struct rproc_vdev, refcount);
struct rproc_vring *rvring;
struct rproc *rproc = rvdev->rproc;
int id;
for (id = 0; id < ARRAY_SIZE(rvdev->vring); id++) {
rvring = &rvdev->vring[id];
rproc_free_vring(rvring);
}
rproc_remove_subdev(rproc, &rvdev->subdev);
rproc_remove_rvdev(rvdev);
device_unregister(&rvdev->dev);
}