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/dev/mem is accessible for root user only. Implement system call instead of mapping using /dev/mem to access stream counter.

This commit is contained in:
MelwareDE 2011-06-14 21:17:01 +00:00
parent 00b4758564
commit 7cb0fe0e8f
3 changed files with 59 additions and 12 deletions
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2
divastreaming/diva_streaming_idi_host_ifc_impl.c
View File

@ -335,7 +335,7 @@ static int init (struct _diva_streaming_idi_host_ifc_w* ifc, dword version, dwor
byte* p = ifc->remote_counter_mapped_base;
ifc->remote_counter_mapped = (dword*)&p[ifc->remote_counter_offset];
} else {
DBG_TRC(("use system call [%s]", ifc->trace_ident))
DBG_TRC(("stream uses system call [%s]", ifc->trace_ident))
}
return (0);

36
divastreaming/segment_alloc.c
View File

@ -59,6 +59,7 @@ typedef struct _diva_segment_alloc {
#if defined(LINUX)
int fd;
int fd_mem;
int fd_xdi;
#endif
#else
DESCRIPTOR* d;
@ -133,9 +134,10 @@ int diva_create_segment_alloc (void* os_context, struct _diva_segment_alloc** s
#if defined(DIVA_USERMODE) /* { */
#if defined(LINUX) /* { */
pI->fd = open ("/dev/DivasMAP", O_RDWR | O_NONBLOCK); /** \todo use hardware related DMA entry, needs update of XDI driver */
pI->fd_mem = open ("/dev/mem", O_RDWR | O_NONBLOCK);
pI->fd_mem = open ("/dev/mem", O_RDWR | O_NONBLOCK); /* /dev/mem is optional */
pI->fd_xdi = open ("/dev/DivasXDI", O_RDWR | O_NONBLOCK); /* /dev/mem is optional */
if (pI->fd >= 0 && pI->fd_mem >= 0) {
if (pI->fd >= 0 && (pI->fd_mem >= 0 || pI->fd_xdi >= 0)) {
*segment_alloc = pI;
} else {
diva_destroy_segment_alloc (&pI);
@ -214,6 +216,8 @@ int diva_destroy_segment_alloc (struct _diva_segment_alloc** segment_alloc) {
close (pI->fd);
if (pI->fd_mem >= 0)
close (pI->fd_mem);
if (pI->fd_xdi >= 0)
close (pI->fd_xdi);
#endif
#else
@ -337,10 +341,13 @@ static void* map_address (struct _diva_segment_alloc* pI, dword lo, dword hi, in
#if defined(DIVA_USERMODE)
#if defined(LINUX)
qword addr = ((qword)lo) | (((qword)hi) << 32);
int effective_map_fd = (map_host == 0) ? pI->fd_mem : pI->fd;
ret = mmap (0, 4*1024, PROT_READ|PROT_WRITE, MAP_SHARED, (map_host == 0) ? pI->fd_mem : pI->fd, addr);
if (ret == ((void*)-1)) {
ret = 0;
if (effective_map_fd >= 0) {
ret = mmap (0, 4*1024, PROT_READ|PROT_WRITE, MAP_SHARED, effective_map_fd, addr);
if (ret == ((void*)-1)) {
ret = 0;
}
}
#endif
#else
@ -379,10 +386,23 @@ static void* umap_address (struct _diva_segment_alloc* ifc, dword lo, dword hi,
return (0);
}
static int write_address (struct _diva_segment_alloc* ifc, dword lo, dword hi, dword data) {
DBG_ERR(("%s %s at %d", __FILE__, "write_address", __LINE__))
static int write_address (struct _diva_segment_alloc* pI, dword lo, dword hi, dword data) {
diva_xdi_direct_access_cmd_t cmd;
int ret;
return (-1);
if (unlikely(pI->fd_xdi < 0))
return (-1);
cmd.hdr.ident = DIVA_XDI_DIRECT_ACCESS_CMD_IDENT;
cmd.hdr.cmd = DIVA_XDI_DIRECT_ACCESS_CMD_WRITE_BY_ADDRESS;
cmd.cmd.write_by_address.address = lo;
cmd.cmd.write_by_address.value = data;
ret = write (pI->fd_xdi, &cmd, sizeof(cmd.hdr)+sizeof(cmd.cmd.write_by_address)) ==
sizeof(cmd.hdr)+sizeof(cmd.cmd.write_by_address) ? 0 : -1;
return (ret);
}
static void resource_removed (struct _diva_segment_alloc* pI) {

33
divastreaming/xdi_msg.h
View File

@ -1,11 +1,15 @@
/*
*
Copyright (c) Dialogic (R) 2009 - 2010
Copyright (c) Dialogic(R), 2010-2011
Copyright 2000-2003 by Armin Schindler (mac@melware.de)
Copyright 2000-2003 Cytronics & Melware (info@melware.de)
*
This source file is supplied for the use with
Eicon Networks range of DIVA Server Adapters.
Dialogic range of Adapters.
*
Dialogic (R) File Revision : 1.9
Dialogic(R) File Revision : 2.1
*
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@ -22,6 +26,7 @@
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#ifndef __DIVA_XDI_UM_CFG_MESSSGE_H__
#define __DIVA_XDI_UM_CFG_MESSAGE_H__
@ -307,5 +312,27 @@ typedef struct _diva_xdi_io_cmd {
void * cmd;
} diva_xdi_io_cmd;
/*
* Diva direct interface access commands
*/
#define DIVA_XDI_DIRECT_ACCESS_CMD_IDENT 0x1234abcd
typedef struct _diva_xdi_direct_access_cmd_hdr {
dword ident;
dword cmd;
} diva_xdi_direct_access_cmd_hdr_t;
#define DIVA_XDI_DIRECT_ACCESS_CMD_WRITE_BY_ADDRESS 1
typedef struct _diva_xdi_direct_access_write_by_address {
dword address;
dword value;
} diva_xdi_direct_access_write_by_address_t;
typedef struct _diva_xdi_direct_access_cmd {
diva_xdi_direct_access_cmd_hdr_t hdr;
union {
diva_xdi_direct_access_write_by_address_t write_by_address;
} cmd;
} diva_xdi_direct_access_cmd_t;
#endif