/*
* ======== strm_get_info ========
* Purpose:
* Retrieves information about a stream.
*/
int strm_get_info(struct strm_object *stream_obj,
struct stream_info *stream_info,
u32 stream_info_size)
{
struct bridge_drv_interface *intf_fxns;
struct chnl_info chnl_info_obj;
int status = 0;
void *virt_base = NULL; /* NULL if no SM used */
if (!stream_obj) {
status = -EFAULT;
} else {
if (stream_info_size < sizeof(struct stream_info)) {
/* size of users info */
status = -EINVAL;
}
}
if (status)
goto func_end;
intf_fxns = stream_obj->strm_mgr_obj->intf_fxns;
status =
(*intf_fxns->chnl_get_info) (stream_obj->chnl_obj,
&chnl_info_obj);
if (status)
goto func_end;
if (stream_obj->xlator) {
/* We have a translator */
cmm_xlator_info(stream_obj->xlator, (u8 **) &virt_base, 0,
stream_obj->segment_id, false);
}
stream_info->segment_id = stream_obj->segment_id;
stream_info->strm_mode = stream_obj->strm_mode;
stream_info->virt_base = virt_base;
stream_info->user_strm->number_bufs_allowed = stream_obj->num_bufs;
stream_info->user_strm->number_bufs_in_stream = chnl_info_obj.cio_cs +
chnl_info_obj.cio_reqs;
/* # of bytes transferred since last call to DSPStream_Idle() */
stream_info->user_strm->number_bytes = chnl_info_obj.bytes_tx;
stream_info->user_strm->sync_object_handle = chnl_info_obj.event_obj;
/* Determine stream state based on channel state and info */
if (chnl_info_obj.state & CHNL_STATEEOS) {
stream_info->user_strm->ss_stream_state = STREAM_DONE;
} else {
if (chnl_info_obj.cio_cs > 0)
stream_info->user_strm->ss_stream_state = STREAM_READY;
else if (chnl_info_obj.cio_reqs > 0)
stream_info->user_strm->ss_stream_state =
STREAM_PENDING;
else
stream_info->user_strm->ss_stream_state = STREAM_IDLE;
}
func_end:
return status;
}
/*
* ======== strm_open ========
* Purpose:
* Open a stream for sending/receiving data buffers to/from a task or
* XDAIS socket node on the DSP.
*/
int strm_open(struct node_object *hnode, u32 dir, u32 index,
struct strm_attr *pattr,
struct strm_res_object **strmres,
struct process_context *pr_ctxt)
{
struct strm_mgr *strm_mgr_obj;
struct bridge_drv_interface *intf_fxns;
u32 ul_chnl_id;
struct strm_object *strm_obj = NULL;
s8 chnl_mode;
struct chnl_attr chnl_attr_obj;
int status = 0;
struct cmm_object *hcmm_mgr = NULL; /* Shared memory manager hndl */
void *stream_res;
DBC_REQUIRE(refs > 0);
DBC_REQUIRE(strmres != NULL);
DBC_REQUIRE(pattr != NULL);
*strmres = NULL;
if (dir != DSP_TONODE && dir != DSP_FROMNODE) {
status = -EPERM;
} else {
/* Get the channel id from the node (set in node_connect()) */
status = node_get_channel_id(hnode, dir, index, &ul_chnl_id);
}
if (!status)
status = node_get_strm_mgr(hnode, &strm_mgr_obj);
if (!status) {
strm_obj = kzalloc(sizeof(struct strm_object), GFP_KERNEL);
if (strm_obj == NULL) {
status = -ENOMEM;
} else {
strm_obj->strm_mgr_obj = strm_mgr_obj;
strm_obj->dir = dir;
strm_obj->strm_state = STREAM_IDLE;
strm_obj->user_event = pattr->user_event;
if (pattr->stream_attr_in != NULL) {
strm_obj->timeout =
pattr->stream_attr_in->timeout;
strm_obj->num_bufs =
pattr->stream_attr_in->num_bufs;
strm_obj->strm_mode =
pattr->stream_attr_in->strm_mode;
strm_obj->segment_id =
pattr->stream_attr_in->segment_id;
strm_obj->buf_alignment =
pattr->stream_attr_in->buf_alignment;
strm_obj->dma_chnl_id =
pattr->stream_attr_in->dma_chnl_id;
strm_obj->dma_priority =
pattr->stream_attr_in->dma_priority;
chnl_attr_obj.uio_reqs =
pattr->stream_attr_in->num_bufs;
} else {
strm_obj->timeout = DEFAULTTIMEOUT;
strm_obj->num_bufs = DEFAULTNUMBUFS;
strm_obj->strm_mode = STRMMODE_PROCCOPY;
strm_obj->segment_id = 0; /* local mem */
strm_obj->buf_alignment = 0;
strm_obj->dma_chnl_id = 0;
strm_obj->dma_priority = 0;
chnl_attr_obj.uio_reqs = DEFAULTNUMBUFS;
}
chnl_attr_obj.reserved1 = NULL;
/* DMA chnl flush timeout */
chnl_attr_obj.reserved2 = strm_obj->timeout;
chnl_attr_obj.event_obj = NULL;
if (pattr->user_event != NULL)
chnl_attr_obj.event_obj = pattr->user_event;
}
}
if (status)
goto func_cont;
if ((pattr->virt_base == NULL) || !(pattr->virt_size > 0))
goto func_cont;
/* No System DMA */
DBC_ASSERT(strm_obj->strm_mode != STRMMODE_LDMA);
/* Get the shared mem mgr for this streams dev object */
status = dev_get_cmm_mgr(strm_mgr_obj->dev_obj, &hcmm_mgr);
if (!status) {
/*Allocate a SM addr translator for this strm. */
status = cmm_xlator_create(&strm_obj->xlator, hcmm_mgr, NULL);
if (!status) {
DBC_ASSERT(strm_obj->segment_id > 0);
/* Set translators Virt Addr attributes */
status = cmm_xlator_info(strm_obj->xlator,
(u8 **) &pattr->virt_base,
pattr->virt_size,
strm_obj->segment_id, true);
}
}
func_cont:
if (!status) {
/* Open channel */
chnl_mode = (dir == DSP_TONODE) ?
CHNL_MODETODSP : CHNL_MODEFROMDSP;
intf_fxns = strm_mgr_obj->intf_fxns;
status = (*intf_fxns->chnl_open) (&(strm_obj->chnl_obj),
strm_mgr_obj->chnl_mgr,
chnl_mode, ul_chnl_id,
&chnl_attr_obj);
if (status) {
/*
* over-ride non-returnable status codes so we return
* something documented
*/
if (status != -ENOMEM && status !=
-EINVAL && status != -EPERM) {
/*
* We got a status that's not return-able.
* Assert that we got something we were
* expecting (-EFAULT isn't acceptable,
* strm_mgr_obj->chnl_mgr better be valid or we
* assert here), and then return -EPERM.
*/
DBC_ASSERT(status == -ENOSR ||
status == -ECHRNG ||
status == -EALREADY ||
status == -EIO);
status = -EPERM;
}
}
}
if (!status) {
status = drv_proc_insert_strm_res_element(strm_obj,
&stream_res, pr_ctxt);
if (status)
delete_strm(strm_obj);
else
*strmres = (struct strm_res_object *)stream_res;
} else {
(void)delete_strm(strm_obj);
}
/* ensure we return a documented error code */
DBC_ENSURE((!status && strm_obj) ||
(*strmres == NULL && (status == -EFAULT ||
status == -EPERM
|| status == -EINVAL)));
dev_dbg(bridge, "%s: hnode: %p dir: 0x%x index: 0x%x pattr: %p "
"strmres: %p status: 0x%x\n", __func__,
hnode, dir, index, pattr, strmres, status);
return status;
}
/*
* ======== node_alloc_msg_buf ========
* Purpose:
* Allocates buffer for zero copy messaging.
*/
DBAPI node_alloc_msg_buf(struct node_object *hnode, u32 usize,
struct dsp_bufferattr *pattr,
u8 **pbuffer)
{
struct node_object *pnode = (struct node_object *)hnode;
int status = 0;
bool va_flag = false;
bool set_info;
u32 proc_id;
DBC_REQUIRE(refs > 0);
DBC_REQUIRE(pbuffer != NULL);
DBC_REQUIRE(usize > 0);
if (!pnode)
status = -EFAULT;
else if (node_get_type(pnode) == NODE_DEVICE)
status = -EPERM;
if (status)
goto func_end;
if (pattr == NULL)
pattr = &node_dfltbufattrs; /* set defaults */
status = proc_get_processor_id(pnode->hprocessor, &proc_id);
if (proc_id != DSP_UNIT) {
DBC_ASSERT(NULL);
goto func_end;
}
/* If segment ID includes MEM_SETVIRTUALSEGID then pbuffer is a
* virt address, so set this info in this node's translator
* object for future ref. If MEM_GETVIRTUALSEGID then retrieve
* virtual address from node's translator. */
if ((pattr->segment_id & MEM_SETVIRTUALSEGID) ||
(pattr->segment_id & MEM_GETVIRTUALSEGID)) {
va_flag = true;
set_info = (pattr->segment_id & MEM_SETVIRTUALSEGID) ?
true : false;
/* Clear mask bits */
pattr->segment_id &= ~MEM_MASKVIRTUALSEGID;
/* Set/get this node's translators virtual address base/size */
status = cmm_xlator_info(pnode->xlator, pbuffer, usize,
pattr->segment_id, set_info);
}
if (!status && (!va_flag)) {
if (pattr->segment_id != 1) {
/* Node supports single SM segment only. */
status = -EBADR;
}
/* Arbitrary SM buffer alignment not supported for host side
* allocs, but guaranteed for the following alignment
* values. */
switch (pattr->buf_alignment) {
case 0:
case 1:
case 2:
case 4:
break;
default:
/* alignment value not suportted */
status = -EPERM;
break;
}
if (!status) {
/* allocate physical buffer from seg_id in node's
* translator */
(void)cmm_xlator_alloc_buf(pnode->xlator, pbuffer,
usize);
if (*pbuffer == NULL) {
pr_err("%s: error - Out of shared memory\n",
__func__);
status = -ENOMEM;
}
}
}
func_end:
return status;
}
