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ANDROID: gunyah: Add support for Gunyah vendor modules

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Add support for further vendor features of Gunyah. To probe the vendor
features, add auxiliary device and export gh_rm_call to all the vendor
features to make not-yet-upstreamed RM RPC calls.

Bug: 268234781
Change-Id: I13de37b7c0d5d6c85bdd32a20c39fdde99cffbdd
Signed-off-by: Prakruthi Deepak Heragu <quic_pheragu@quicinc.com>
Signed-off-by: Elliot Berman <quic_eberman@quicinc.com>
This commit is contained in:
Prakruthi Deepak Heragu
2023-02-27 16:40:34 -08:00
committed by Aleksei Vetrov
parent c2c0bebcdb
commit 1dce9d7d4d
3 changed files with 43 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/virt/gunyah/Kconfig
View File

@@ -5,6 +5,7 @@ config GUNYAH
depends on ARM64
depends on MAILBOX
select GUNYAH_PLATFORM_HOOKS
select AUXILIARY_BUS
help
The Gunyah drivers are the helper interfaces that run in a guest VM
such as basic inter-VM IPC and signaling mechanisms, and higher level

40
drivers/virt/gunyah/rsc_mgr.c
View File

@@ -13,6 +13,7 @@
#include <linux/notifier.h>
#include <linux/workqueue.h>
#include <linux/completion.h>
#include <linux/auxiliary_bus.h>
#include <linux/gunyah_rsc_mgr.h>
#include <linux/platform_device.h>
#include <linux/miscdevice.h>
@@ -152,6 +153,7 @@ struct gh_rm {
struct mutex send_lock;
struct blocking_notifier_head nh;
struct auxiliary_device adev;
struct miscdevice miscdev;
struct irq_domain *irq_domain;
};
@@ -704,6 +706,7 @@ free:
kfree(connection);
return ret;
}
EXPORT_SYMBOL_GPL(gh_rm_call);
int gh_rm_notifier_register(struct gh_rm *rm, struct notifier_block *nb)
@@ -745,6 +748,32 @@ static const struct file_operations gh_dev_fops = {
.llseek = noop_llseek,
};
static void gh_adev_release(struct device *dev)
{
/* no-op */
}
static int gh_adev_init(struct gh_rm *rm, const char *name)
{
struct auxiliary_device *adev = &rm->adev;
int ret = 0;
adev->name = name;
adev->dev.parent = rm->dev;
adev->dev.release = gh_adev_release;
ret = auxiliary_device_init(adev);
if (ret)
return ret;
ret = auxiliary_device_add(adev);
if (ret) {
auxiliary_device_uninit(adev);
return ret;
}
return ret;
}
static int gh_msgq_platform_probe_direction(struct platform_device *pdev, bool tx,
struct gh_resource *ghrsc)
{
@@ -841,7 +870,16 @@ static int gh_rm_drv_probe(struct platform_device *pdev)
if (ret)
goto err_irq_domain;
ret = gh_adev_init(rm, "gh_rm_core");
if (ret) {
dev_err(&pdev->dev, "Failed to add gh_rm_core device\n");
goto err_misc_device;
}
return 0;
err_misc_device:
misc_deregister(&rm->miscdev);
err_irq_domain:
irq_domain_remove(rm->irq_domain);
err_msgq:
@@ -856,6 +894,8 @@ static int gh_rm_drv_remove(struct platform_device *pdev)
{
struct gh_rm *rm = platform_get_drvdata(pdev);
auxiliary_device_delete(&rm->adev);
auxiliary_device_uninit(&rm->adev);
misc_deregister(&rm->miscdev);
irq_domain_remove(rm->irq_domain);
mbox_free_channel(gh_msgq_chan(&rm->msgq));

2
include/linux/gunyah_rsc_mgr.h
View File

@@ -14,6 +14,8 @@
#define GH_MEM_HANDLE_INVAL U32_MAX
struct gh_rm;
int gh_rm_call(struct gh_rm *rm, u32 message_id, void *req_buff, size_t req_buff_size,
void **resp_buf, size_t *resp_buff_size);
int gh_rm_notifier_register(struct gh_rm *rm, struct notifier_block *nb);
int gh_rm_notifier_unregister(struct gh_rm *rm, struct notifier_block *nb);
struct device *gh_rm_get(struct gh_rm *rm);