| /* |
| * strm.c |
| * |
| * DSP-BIOS Bridge driver support functions for TI OMAP processors. |
| * |
| * DSP/BIOS Bridge Stream Manager. |
| * |
| * Copyright (C) 2005-2006 Texas Instruments, Inc. |
| * |
| * This package is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
| * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
| */ |
| |
| #include <linux/types.h> |
| |
| /* ----------------------------------- Host OS */ |
| #include <dspbridge/host_os.h> |
| |
| /* ----------------------------------- DSP/BIOS Bridge */ |
| #include <dspbridge/dbdefs.h> |
| |
| /* ----------------------------------- Trace & Debug */ |
| #include <dspbridge/dbc.h> |
| |
| /* ----------------------------------- OS Adaptation Layer */ |
| #include <dspbridge/sync.h> |
| |
| /* ----------------------------------- Bridge Driver */ |
| #include <dspbridge/dspdefs.h> |
| |
| /* ----------------------------------- Resource Manager */ |
| #include <dspbridge/nodepriv.h> |
| |
| /* ----------------------------------- Others */ |
| #include <dspbridge/cmm.h> |
| |
| /* ----------------------------------- This */ |
| #include <dspbridge/strm.h> |
| |
| #include <dspbridge/resourcecleanup.h> |
| |
| /* ----------------------------------- Defines, Data Structures, Typedefs */ |
| #define DEFAULTTIMEOUT 10000 |
| #define DEFAULTNUMBUFS 2 |
| |
| /* |
| * ======== strm_mgr ======== |
| * The strm_mgr contains device information needed to open the underlying |
| * channels of a stream. |
| */ |
| struct strm_mgr { |
| struct dev_object *dev_obj; /* Device for this processor */ |
| struct chnl_mgr *hchnl_mgr; /* Channel manager */ |
| /* Function interface to Bridge driver */ |
| struct bridge_drv_interface *intf_fxns; |
| }; |
| |
| /* |
| * ======== strm_object ======== |
| * This object is allocated in strm_open(). |
| */ |
| struct strm_object { |
| struct strm_mgr *strm_mgr_obj; |
| struct chnl_object *chnl_obj; |
| u32 dir; /* DSP_TONODE or DSP_FROMNODE */ |
| u32 utimeout; |
| u32 num_bufs; /* Max # of bufs allowed in stream */ |
| u32 un_bufs_in_strm; /* Current # of bufs in stream */ |
| u32 ul_n_bytes; /* bytes transferred since idled */ |
| /* STREAM_IDLE, STREAM_READY, ... */ |
| enum dsp_streamstate strm_state; |
| void *user_event; /* Saved for strm_get_info() */ |
| enum dsp_strmmode strm_mode; /* STRMMODE_[PROCCOPY][ZEROCOPY]... */ |
| u32 udma_chnl_id; /* DMA chnl id */ |
| u32 udma_priority; /* DMA priority:DMAPRI_[LOW][HIGH] */ |
| u32 segment_id; /* >0 is SM segment.=0 is local heap */ |
| u32 buf_alignment; /* Alignment for stream bufs */ |
| /* Stream's SM address translator */ |
| struct cmm_xlatorobject *xlator; |
| }; |
| |
| /* ----------------------------------- Globals */ |
| static u32 refs; /* module reference count */ |
| |
| /* ----------------------------------- Function Prototypes */ |
| static int delete_strm(struct strm_object *stream_obj); |
| |
| /* |
| * ======== strm_allocate_buffer ======== |
| * Purpose: |
| * Allocates buffers for a stream. |
| */ |
| int strm_allocate_buffer(struct strm_res_object *strmres, u32 usize, |
| u8 **ap_buffer, u32 num_bufs, |
| struct process_context *pr_ctxt) |
| { |
| int status = 0; |
| u32 alloc_cnt = 0; |
| u32 i; |
| struct strm_object *stream_obj = strmres->hstream; |
| |
| DBC_REQUIRE(refs > 0); |
| DBC_REQUIRE(ap_buffer != NULL); |
| |
| if (stream_obj) { |
| /* |
| * Allocate from segment specified at time of stream open. |
| */ |
| if (usize == 0) |
| status = -EINVAL; |
| |
| } else { |
| status = -EFAULT; |
| } |
| |
| if (status) |
| goto func_end; |
| |
| for (i = 0; i < num_bufs; i++) { |
| DBC_ASSERT(stream_obj->xlator != NULL); |
| (void)cmm_xlator_alloc_buf(stream_obj->xlator, &ap_buffer[i], |
| usize); |
| if (ap_buffer[i] == NULL) { |
| status = -ENOMEM; |
| alloc_cnt = i; |
| break; |
| } |
| } |
| if (status) |
| strm_free_buffer(strmres, ap_buffer, alloc_cnt, pr_ctxt); |
| |
| if (status) |
| goto func_end; |
| |
| drv_proc_update_strm_res(num_bufs, strmres); |
| |
| func_end: |
| return status; |
| } |
| |
| /* |
| * ======== strm_close ======== |
| * Purpose: |
| * Close a stream opened with strm_open(). |
| */ |
| int strm_close(struct strm_res_object *strmres, |
| struct process_context *pr_ctxt) |
| { |
| struct bridge_drv_interface *intf_fxns; |
| struct chnl_info chnl_info_obj; |
| int status = 0; |
| struct strm_object *stream_obj = strmres->hstream; |
| |
| DBC_REQUIRE(refs > 0); |
| |
| if (!stream_obj) { |
| status = -EFAULT; |
| } else { |
| /* Have all buffers been reclaimed? If not, return |
| * -EPIPE */ |
| intf_fxns = stream_obj->strm_mgr_obj->intf_fxns; |
| status = |
| (*intf_fxns->pfn_chnl_get_info) (stream_obj->chnl_obj, |
| &chnl_info_obj); |
| DBC_ASSERT(!status); |
| |
| if (chnl_info_obj.cio_cs > 0 || chnl_info_obj.cio_reqs > 0) |
| status = -EPIPE; |
| else |
| status = delete_strm(stream_obj); |
| } |
| |
| if (status) |
| goto func_end; |
| |
| idr_remove(pr_ctxt->stream_id, strmres->id); |
| func_end: |
| DBC_ENSURE(status == 0 || status == -EFAULT || |
| status == -EPIPE || status == -EPERM); |
| |
| dev_dbg(bridge, "%s: stream_obj: %p, status 0x%x\n", __func__, |
| stream_obj, status); |
| return status; |
| } |
| |
| /* |
| * ======== strm_create ======== |
| * Purpose: |
| * Create a STRM manager object. |
| */ |
| int strm_create(struct strm_mgr **strm_man, |
| struct dev_object *dev_obj) |
| { |
| struct strm_mgr *strm_mgr_obj; |
| int status = 0; |
| |
| DBC_REQUIRE(refs > 0); |
| DBC_REQUIRE(strm_man != NULL); |
| DBC_REQUIRE(dev_obj != NULL); |
| |
| *strm_man = NULL; |
| /* Allocate STRM manager object */ |
| strm_mgr_obj = kzalloc(sizeof(struct strm_mgr), GFP_KERNEL); |
| if (strm_mgr_obj == NULL) |
| status = -ENOMEM; |
| else |
| strm_mgr_obj->dev_obj = dev_obj; |
| |
| /* Get Channel manager and Bridge function interface */ |
| if (!status) { |
| status = dev_get_chnl_mgr(dev_obj, &(strm_mgr_obj->hchnl_mgr)); |
| if (!status) { |
| (void)dev_get_intf_fxns(dev_obj, |
| &(strm_mgr_obj->intf_fxns)); |
| DBC_ASSERT(strm_mgr_obj->intf_fxns != NULL); |
| } |
| } |
| |
| if (!status) |
| *strm_man = strm_mgr_obj; |
| else |
| kfree(strm_mgr_obj); |
| |
| DBC_ENSURE((!status && *strm_man) || (status && *strm_man == NULL)); |
| |
| return status; |
| } |
| |
| /* |
| * ======== strm_delete ======== |
| * Purpose: |
| * Delete the STRM Manager Object. |
| */ |
| void strm_delete(struct strm_mgr *strm_mgr_obj) |
| { |
| DBC_REQUIRE(refs > 0); |
| DBC_REQUIRE(strm_mgr_obj); |
| |
| kfree(strm_mgr_obj); |
| } |
| |
| /* |
| * ======== strm_exit ======== |
| * Purpose: |
| * Discontinue usage of STRM module. |
| */ |
| void strm_exit(void) |
| { |
| DBC_REQUIRE(refs > 0); |
| |
| refs--; |
| |
| DBC_ENSURE(refs >= 0); |
| } |
| |
| /* |
| * ======== strm_free_buffer ======== |
| * Purpose: |
| * Frees the buffers allocated for a stream. |
| */ |
| int strm_free_buffer(struct strm_res_object *strmres, u8 ** ap_buffer, |
| u32 num_bufs, struct process_context *pr_ctxt) |
| { |
| int status = 0; |
| u32 i = 0; |
| struct strm_object *stream_obj = strmres->hstream; |
| |
| DBC_REQUIRE(refs > 0); |
| DBC_REQUIRE(ap_buffer != NULL); |
| |
| if (!stream_obj) |
| status = -EFAULT; |
| |
| if (!status) { |
| for (i = 0; i < num_bufs; i++) { |
| DBC_ASSERT(stream_obj->xlator != NULL); |
| status = |
| cmm_xlator_free_buf(stream_obj->xlator, |
| ap_buffer[i]); |
| if (status) |
| break; |
| ap_buffer[i] = NULL; |
| } |
| } |
| drv_proc_update_strm_res(num_bufs - i, strmres); |
| |
| return status; |
| } |
| |
| /* |
| * ======== 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 */ |
| |
| DBC_REQUIRE(refs > 0); |
| DBC_REQUIRE(stream_info != NULL); |
| DBC_REQUIRE(stream_info_size >= sizeof(struct stream_info)); |
| |
| 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->pfn_chnl_get_info) (stream_obj->chnl_obj, |
| &chnl_info_obj); |
| if (status) |
| goto func_end; |
| |
| if (stream_obj->xlator) { |
| /* We have a translator */ |
| DBC_ASSERT(stream_obj->segment_id > 0); |
| 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->ul_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.dw_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_idle ======== |
| * Purpose: |
| * Idles a particular stream. |
| */ |
| int strm_idle(struct strm_object *stream_obj, bool flush_data) |
| { |
| struct bridge_drv_interface *intf_fxns; |
| int status = 0; |
| |
| DBC_REQUIRE(refs > 0); |
| |
| if (!stream_obj) { |
| status = -EFAULT; |
| } else { |
| intf_fxns = stream_obj->strm_mgr_obj->intf_fxns; |
| |
| status = (*intf_fxns->pfn_chnl_idle) (stream_obj->chnl_obj, |
| stream_obj->utimeout, |
| flush_data); |
| } |
| |
| dev_dbg(bridge, "%s: stream_obj: %p flush_data: 0x%x status: 0x%x\n", |
| __func__, stream_obj, flush_data, status); |
| return status; |
| } |
| |
| /* |
| * ======== strm_init ======== |
| * Purpose: |
| * Initialize the STRM module. |
| */ |
| bool strm_init(void) |
| { |
| bool ret = true; |
| |
| DBC_REQUIRE(refs >= 0); |
| |
| if (ret) |
| refs++; |
| |
| DBC_ENSURE((ret && (refs > 0)) || (!ret && (refs >= 0))); |
| |
| return ret; |
| } |
| |
| /* |
| * ======== strm_issue ======== |
| * Purpose: |
| * Issues a buffer on a stream |
| */ |
| int strm_issue(struct strm_object *stream_obj, u8 *pbuf, u32 ul_bytes, |
| u32 ul_buf_size, u32 dw_arg) |
| { |
| struct bridge_drv_interface *intf_fxns; |
| int status = 0; |
| void *tmp_buf = NULL; |
| |
| DBC_REQUIRE(refs > 0); |
| DBC_REQUIRE(pbuf != NULL); |
| |
| if (!stream_obj) { |
| status = -EFAULT; |
| } else { |
| intf_fxns = stream_obj->strm_mgr_obj->intf_fxns; |
| |
| if (stream_obj->segment_id != 0) { |
| tmp_buf = cmm_xlator_translate(stream_obj->xlator, |
| (void *)pbuf, |
| CMM_VA2DSPPA); |
| if (tmp_buf == NULL) |
| status = -ESRCH; |
| |
| } |
| if (!status) { |
| status = (*intf_fxns->pfn_chnl_add_io_req) |
| (stream_obj->chnl_obj, pbuf, ul_bytes, ul_buf_size, |
| (u32) tmp_buf, dw_arg); |
| } |
| if (status == -EIO) |
| status = -ENOSR; |
| } |
| |
| dev_dbg(bridge, "%s: stream_obj: %p pbuf: %p ul_bytes: 0x%x dw_arg:" |
| " 0x%x status: 0x%x\n", __func__, stream_obj, pbuf, |
| ul_bytes, dw_arg, status); |
| 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->utimeout = |
| pattr->stream_attr_in->utimeout; |
| 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->udma_chnl_id = |
| pattr->stream_attr_in->udma_chnl_id; |
| strm_obj->udma_priority = |
| pattr->stream_attr_in->udma_priority; |
| chnl_attr_obj.uio_reqs = |
| pattr->stream_attr_in->num_bufs; |
| } else { |
| strm_obj->utimeout = 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->udma_chnl_id = 0; |
| strm_obj->udma_priority = 0; |
| chnl_attr_obj.uio_reqs = DEFAULTNUMBUFS; |
| } |
| chnl_attr_obj.reserved1 = NULL; |
| /* DMA chnl flush timeout */ |
| chnl_attr_obj.reserved2 = strm_obj->utimeout; |
| 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->ul_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->ul_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->pfn_chnl_open) (&(strm_obj->chnl_obj), |
| strm_mgr_obj->hchnl_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->hchnl_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; |
| } |
| |
| /* |
| * ======== strm_reclaim ======== |
| * Purpose: |
| * Relcaims a buffer from a stream. |
| */ |
| int strm_reclaim(struct strm_object *stream_obj, u8 ** buf_ptr, |
| u32 *nbytes, u32 *buff_size, u32 *pdw_arg) |
| { |
| struct bridge_drv_interface *intf_fxns; |
| struct chnl_ioc chnl_ioc_obj; |
| int status = 0; |
| void *tmp_buf = NULL; |
| |
| DBC_REQUIRE(refs > 0); |
| DBC_REQUIRE(buf_ptr != NULL); |
| DBC_REQUIRE(nbytes != NULL); |
| DBC_REQUIRE(pdw_arg != NULL); |
| |
| if (!stream_obj) { |
| status = -EFAULT; |
| goto func_end; |
| } |
| intf_fxns = stream_obj->strm_mgr_obj->intf_fxns; |
| |
| status = |
| (*intf_fxns->pfn_chnl_get_ioc) (stream_obj->chnl_obj, |
| stream_obj->utimeout, |
| &chnl_ioc_obj); |
| if (!status) { |
| *nbytes = chnl_ioc_obj.byte_size; |
| if (buff_size) |
| *buff_size = chnl_ioc_obj.buf_size; |
| |
| *pdw_arg = chnl_ioc_obj.dw_arg; |
| if (!CHNL_IS_IO_COMPLETE(chnl_ioc_obj)) { |
| if (CHNL_IS_TIMED_OUT(chnl_ioc_obj)) { |
| status = -ETIME; |
| } else { |
| /* Allow reclaims after idle to succeed */ |
| if (!CHNL_IS_IO_CANCELLED(chnl_ioc_obj)) |
| status = -EPERM; |
| |
| } |
| } |
| /* Translate zerocopy buffer if channel not canceled. */ |
| if (!status |
| && (!CHNL_IS_IO_CANCELLED(chnl_ioc_obj)) |
| && (stream_obj->strm_mode == STRMMODE_ZEROCOPY)) { |
| /* |
| * This is a zero-copy channel so chnl_ioc_obj.pbuf |
| * contains the DSP address of SM. We need to |
| * translate it to a virtual address for the user |
| * thread to access. |
| * Note: Could add CMM_DSPPA2VA to CMM in the future. |
| */ |
| tmp_buf = cmm_xlator_translate(stream_obj->xlator, |
| chnl_ioc_obj.pbuf, |
| CMM_DSPPA2PA); |
| if (tmp_buf != NULL) { |
| /* now convert this GPP Pa to Va */ |
| tmp_buf = cmm_xlator_translate(stream_obj-> |
| xlator, |
| tmp_buf, |
| CMM_PA2VA); |
| } |
| if (tmp_buf == NULL) |
| status = -ESRCH; |
| |
| chnl_ioc_obj.pbuf = tmp_buf; |
| } |
| *buf_ptr = chnl_ioc_obj.pbuf; |
| } |
| func_end: |
| /* ensure we return a documented return code */ |
| DBC_ENSURE(!status || status == -EFAULT || |
| status == -ETIME || status == -ESRCH || |
| status == -EPERM); |
| |
| dev_dbg(bridge, "%s: stream_obj: %p buf_ptr: %p nbytes: %p " |
| "pdw_arg: %p status 0x%x\n", __func__, stream_obj, |
| buf_ptr, nbytes, pdw_arg, status); |
| return status; |
| } |
| |
| /* |
| * ======== strm_register_notify ======== |
| * Purpose: |
| * Register to be notified on specific events for this stream. |
| */ |
| int strm_register_notify(struct strm_object *stream_obj, u32 event_mask, |
| u32 notify_type, struct dsp_notification |
| * hnotification) |
| { |
| struct bridge_drv_interface *intf_fxns; |
| int status = 0; |
| |
| DBC_REQUIRE(refs > 0); |
| DBC_REQUIRE(hnotification != NULL); |
| |
| if (!stream_obj) { |
| status = -EFAULT; |
| } else if ((event_mask & ~((DSP_STREAMIOCOMPLETION) | |
| DSP_STREAMDONE)) != 0) { |
| status = -EINVAL; |
| } else { |
| if (notify_type != DSP_SIGNALEVENT) |
| status = -ENOSYS; |
| |
| } |
| if (!status) { |
| intf_fxns = stream_obj->strm_mgr_obj->intf_fxns; |
| |
| status = |
| (*intf_fxns->pfn_chnl_register_notify) (stream_obj-> |
| chnl_obj, |
| event_mask, |
| notify_type, |
| hnotification); |
| } |
| /* ensure we return a documented return code */ |
| DBC_ENSURE(!status || status == -EFAULT || |
| status == -ETIME || status == -ESRCH || |
| status == -ENOSYS || status == -EPERM); |
| return status; |
| } |
| |
| /* |
| * ======== strm_select ======== |
| * Purpose: |
| * Selects a ready stream. |
| */ |
| int strm_select(struct strm_object **strm_tab, u32 strms, |
| u32 *pmask, u32 utimeout) |
| { |
| u32 index; |
| struct chnl_info chnl_info_obj; |
| struct bridge_drv_interface *intf_fxns; |
| struct sync_object **sync_events = NULL; |
| u32 i; |
| int status = 0; |
| |
| DBC_REQUIRE(refs > 0); |
| DBC_REQUIRE(strm_tab != NULL); |
| DBC_REQUIRE(pmask != NULL); |
| DBC_REQUIRE(strms > 0); |
| |
| *pmask = 0; |
| for (i = 0; i < strms; i++) { |
| if (!strm_tab[i]) { |
| status = -EFAULT; |
| break; |
| } |
| } |
| if (status) |
| goto func_end; |
| |
| /* Determine which channels have IO ready */ |
| for (i = 0; i < strms; i++) { |
| intf_fxns = strm_tab[i]->strm_mgr_obj->intf_fxns; |
| status = (*intf_fxns->pfn_chnl_get_info) (strm_tab[i]->chnl_obj, |
| &chnl_info_obj); |
| if (status) { |
| break; |
| } else { |
| if (chnl_info_obj.cio_cs > 0) |
| *pmask |= (1 << i); |
| |
| } |
| } |
| if (!status && utimeout > 0 && *pmask == 0) { |
| /* Non-zero timeout */ |
| sync_events = kmalloc(strms * sizeof(struct sync_object *), |
| GFP_KERNEL); |
| |
| if (sync_events == NULL) { |
| status = -ENOMEM; |
| } else { |
| for (i = 0; i < strms; i++) { |
| intf_fxns = |
| strm_tab[i]->strm_mgr_obj->intf_fxns; |
| status = (*intf_fxns->pfn_chnl_get_info) |
| (strm_tab[i]->chnl_obj, &chnl_info_obj); |
| if (status) |
| break; |
| else |
| sync_events[i] = |
| chnl_info_obj.sync_event; |
| |
| } |
| } |
| if (!status) { |
| status = |
| sync_wait_on_multiple_events(sync_events, strms, |
| utimeout, &index); |
| if (!status) { |
| /* Since we waited on the event, we have to |
| * reset it */ |
| sync_set_event(sync_events[index]); |
| *pmask = 1 << index; |
| } |
| } |
| } |
| func_end: |
| kfree(sync_events); |
| |
| DBC_ENSURE((!status && (*pmask != 0 || utimeout == 0)) || |
| (status && *pmask == 0)); |
| |
| return status; |
| } |
| |
| /* |
| * ======== delete_strm ======== |
| * Purpose: |
| * Frees the resources allocated for a stream. |
| */ |
| static int delete_strm(struct strm_object *stream_obj) |
| { |
| struct bridge_drv_interface *intf_fxns; |
| int status = 0; |
| |
| if (stream_obj) { |
| if (stream_obj->chnl_obj) { |
| intf_fxns = stream_obj->strm_mgr_obj->intf_fxns; |
| /* Channel close can fail only if the channel handle |
| * is invalid. */ |
| status = (*intf_fxns->pfn_chnl_close) |
| (stream_obj->chnl_obj); |
| } |
| /* Free all SM address translator resources */ |
| kfree(stream_obj->xlator); |
| kfree(stream_obj); |
| } else { |
| status = -EFAULT; |
| } |
| return status; |
| } |