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misc: fastrpc: Add support to get DSP capabilities

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Add support to get DSP capabilities. The capability information is cached
on driver.

Signed-off-by: Jeya R <jeyr@codeaurora.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20220214161002.6831-4-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jeya R 2022-02-14 16:09:53 +00:00 committed by Greg Kroah-Hartman
parent 5c1b97c7d7
commit 6c16fd8bdd
2 changed files with 120 additions and 0 deletions
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112
drivers/misc/fastrpc.c
View File

@ -31,10 +31,15 @@
#define FASTRPC_PHYS(p) ((p) & 0xffffffff)
#define FASTRPC_CTX_MAX (256)
#define FASTRPC_INIT_HANDLE 1
#define FASTRPC_DSP_UTILITIES_HANDLE 2
#define FASTRPC_CTXID_MASK (0xFF0)
#define INIT_FILELEN_MAX (2 * 1024 * 1024)
#define FASTRPC_DEVICE_NAME "fastrpc"
#define ADSP_MMAP_ADD_PAGES 0x1000
#define DSP_UNSUPPORTED_API (0x80000414)
/* MAX NUMBER of DSP ATTRIBUTES SUPPORTED */
#define FASTRPC_MAX_DSP_ATTRIBUTES (256)
#define FASTRPC_MAX_DSP_ATTRIBUTES_LEN (sizeof(u32) * FASTRPC_MAX_DSP_ATTRIBUTES)
/* Retrives number of input buffers from the scalars parameter */
#define REMOTE_SCALARS_INBUFS(sc) (((sc) >> 16) & 0x0ff)
@ -233,6 +238,9 @@ struct fastrpc_channel_ctx {
struct idr ctx_idr;
struct list_head users;
struct kref refcount;
/* Flag if dsp attributes are cached */
bool valid_attributes;
u32 dsp_attributes[FASTRPC_MAX_DSP_ATTRIBUTES];
struct fastrpc_device *fdevice;
};
@ -1378,6 +1386,107 @@ static int fastrpc_invoke(struct fastrpc_user *fl, char __user *argp)
return err;
}
static int fastrpc_get_info_from_dsp(struct fastrpc_user *fl, uint32_t *dsp_attr_buf,
uint32_t dsp_attr_buf_len)
{
struct fastrpc_invoke_args args[2] = { 0 };
/* Capability filled in userspace */
dsp_attr_buf[0] = 0;
args[0].ptr = (u64)(uintptr_t)&dsp_attr_buf_len;
args[0].length = sizeof(dsp_attr_buf_len);
args[0].fd = -1;
args[1].ptr = (u64)(uintptr_t)&dsp_attr_buf[1];
args[1].length = dsp_attr_buf_len;
args[1].fd = -1;
fl->pd = 1;
return fastrpc_internal_invoke(fl, true, FASTRPC_DSP_UTILITIES_HANDLE,
FASTRPC_SCALARS(0, 1, 1), args);
}
static int fastrpc_get_info_from_kernel(struct fastrpc_ioctl_capability *cap,
struct fastrpc_user *fl)
{
struct fastrpc_channel_ctx *cctx = fl->cctx;
uint32_t attribute_id = cap->attribute_id;
uint32_t *dsp_attributes;
unsigned long flags;
uint32_t domain = cap->domain;
int err;
spin_lock_irqsave(&cctx->lock, flags);
/* check if we already have queried dsp for attributes */
if (cctx->valid_attributes) {
spin_unlock_irqrestore(&cctx->lock, flags);
goto done;
}
spin_unlock_irqrestore(&cctx->lock, flags);
dsp_attributes = kzalloc(FASTRPC_MAX_DSP_ATTRIBUTES_LEN, GFP_KERNEL);
if (!dsp_attributes)
return -ENOMEM;
err = fastrpc_get_info_from_dsp(fl, dsp_attributes, FASTRPC_MAX_DSP_ATTRIBUTES_LEN);
if (err == DSP_UNSUPPORTED_API) {
dev_info(&cctx->rpdev->dev,
"Warning: DSP capabilities not supported on domain: %d\n", domain);
kfree(dsp_attributes);
return -EOPNOTSUPP;
} else if (err) {
dev_err(&cctx->rpdev->dev, "Error: dsp information is incorrect err: %d\n", err);
kfree(dsp_attributes);
return err;
}
spin_lock_irqsave(&cctx->lock, flags);
memcpy(cctx->dsp_attributes, dsp_attributes, FASTRPC_MAX_DSP_ATTRIBUTES_LEN);
cctx->valid_attributes = true;
spin_unlock_irqrestore(&cctx->lock, flags);
kfree(dsp_attributes);
done:
cap->capability = cctx->dsp_attributes[attribute_id];
return 0;
}
static int fastrpc_get_dsp_info(struct fastrpc_user *fl, char __user *argp)
{
struct fastrpc_ioctl_capability cap = {0};
int err = 0;
if (copy_from_user(&cap, argp, sizeof(cap)))
return -EFAULT;
cap.capability = 0;
if (cap.domain >= FASTRPC_DEV_MAX) {
dev_err(&fl->cctx->rpdev->dev, "Error: Invalid domain id:%d, err:%d\n",
cap.domain, err);
return -ECHRNG;
}
/* Fastrpc Capablities does not support modem domain */
if (cap.domain == MDSP_DOMAIN_ID) {
dev_err(&fl->cctx->rpdev->dev, "Error: modem not supported %d\n", err);
return -ECHRNG;
}
if (cap.attribute_id >= FASTRPC_MAX_DSP_ATTRIBUTES) {
dev_err(&fl->cctx->rpdev->dev, "Error: invalid attribute: %d, err: %d\n",
cap.attribute_id, err);
return -EOVERFLOW;
}
err = fastrpc_get_info_from_kernel(&cap, fl);
if (err)
return err;
if (copy_to_user(argp, &cap.capability, sizeof(cap.capability)))
return -EFAULT;
return 0;
}
static int fastrpc_req_munmap_impl(struct fastrpc_user *fl,
struct fastrpc_req_munmap *req)
{
@ -1683,6 +1792,9 @@ static long fastrpc_device_ioctl(struct file *file, unsigned int cmd,
case FASTRPC_IOCTL_MEM_UNMAP:
err = fastrpc_req_mem_unmap(fl, argp);
break;
case FASTRPC_IOCTL_GET_DSP_INFO:
err = fastrpc_get_dsp_info(fl, argp);
break;
default:
err = -ENOTTY;
break;

8
include/uapi/misc/fastrpc.h
View File

@ -15,6 +15,7 @@
#define FASTRPC_IOCTL_INIT_ATTACH_SNS _IO('R', 8)
#define FASTRPC_IOCTL_MEM_MAP _IOWR('R', 10, struct fastrpc_mem_map)
#define FASTRPC_IOCTL_MEM_UNMAP _IOWR('R', 11, struct fastrpc_mem_unmap)
#define FASTRPC_IOCTL_GET_DSP_INFO _IOWR('R', 13, struct fastrpc_ioctl_capability)
/**
* enum fastrpc_map_flags - control flags for mapping memory on DSP user process
@ -105,4 +106,11 @@ struct fastrpc_mem_unmap {
__s32 reserved[5];
};
struct fastrpc_ioctl_capability {
__u32 domain;
__u32 attribute_id;
__u32 capability; /* dsp capability */
__u32 reserved[4];
};
#endif /* __QCOM_FASTRPC_H__ */