source: trunk/kernel/devices/dev_ioc.c @ 637

Last change on this file since 637 was 637, checked in by alain, 5 years ago

Introduce the non-standard pthread_parallel_create() system call
and re-write the <fft> and <sort> applications to improve the
intrinsic paralelism in applications.

File size: 9.8 KB
RevLine 
[1]1/*
2 * dev_ioc.c - IOC (Block Device Controler) generic device API implementation.
[212]3 *
[626]4 * Author  Alain Greiner    (2016,2017,2018,2019)
[1]5 *
6 * Copyright (c) UPMC Sorbonne Universites
7 *
8 * This file is part of ALMOS-MK
9 *
[212]10 * ALMOS-MKH is free software; you can redistribute it and/or modify it
[1]11 * under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; version 2.0 of the License.
13 *
[212]14 * ALMOS-MKH is distributed in the hope that it will be useful, but
[1]15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
[212]20 * along with ALMOS-MKH; if not, write to the Free Software Foundation,
[1]21 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 */
23
[14]24#include <kernel_config.h>
[457]25#include <hal_kernel_types.h>
[1]26#include <hal_gpt.h>
[213]27#include <hal_drivers.h>
[1]28#include <thread.h>
29#include <printk.h>
[3]30#include <chdev.h>
[1]31#include <dev_ioc.h>
32
33/////////////////////////////////////////////////////////////////////////////////////////
34// Extern global variables
35/////////////////////////////////////////////////////////////////////////////////////////
36
[188]37extern chdev_directory_t  chdev_dir;     // allocated in kernel_init.c
[1]38
[626]39////////////////////////////////////////
40char * dev_ioc_cmd_str( cmd_type_t cmd )
41{
42    if     ( cmd == IOC_READ       )  return "READ";
43    else if( cmd == IOC_WRITE      )  return "WRITE";
44    else if( cmd == IOC_SYNC_READ  )  return "SYNC_READ";
45    else if( cmd == IOC_SYNC_WRITE )  return "SYNC_WRITE";
46    else                              return "undefined";
47}
48
[188]49//////////////////////////////////
50void dev_ioc_init( chdev_t * ioc )
[1]51{
[188]52    // the PIC chdev must be initialized before the IOC chdev, because
53    // the IOC chdev initialisation requires the routing of an external IRQ
54    xptr_t  pic_xp  = chdev_dir.pic;
[1]55
[492]56    assert( (pic_xp != XPTR_NULL) , "PIC not initialised before IOC" );
[188]57
[3]58    // get implementation and channel from chdev descriptor
[188]59    uint32_t  impl    = ioc->impl;
60    uint32_t  channel = ioc->channel;
[1]61
[23]62    // set chdev name
[407]63    snprintf( ioc->name , 16 , "ioc%d" , channel );
[23]64
[211]65    // call driver init function
[216]66    hal_drivers_ioc_init( ioc, impl );
[1]67
[188]68    // select a core to execute the IOC server thread
[637]69    lid_t lid = cluster_select_local_core( local_cxy );
[3]70
[188]71    // bind the IOC IRQ to the selected core
72    dev_pic_bind_irq( lid , ioc );
[3]73
[188]74    // enable IRQ
[238]75    dev_pic_enable_irq( lid , XPTR( local_cxy , ioc ) );
[3]76
[1]77    // create server thread
[3]78    thread_t * new_thread;
[1]79    error_t    error;
80
[3]81    error = thread_kernel_create( &new_thread,
82                                  THREAD_DEV,
[619]83                                  &chdev_server_func,
[188]84                                  ioc,
[212]85                                  lid );
[188]86
[492]87    assert( (error == 0) , "cannot create server thread" );
[1]88
[408]89    // set "server" field in chdev descriptor
[188]90    ioc->server = new_thread;
[212]91
[408]92    // set "chdev field in thread descriptor
93    new_thread->chdev = ioc;
94
95    // unblock server thread
[3]96    thread_unblock( XPTR( local_cxy , new_thread ) , THREAD_BLOCKED_GLOBAL );
[212]97
[1]98}  // end dev_ioc_init()
99
100//////////////////////////////////////////////////////////////////////////////////
101// This static function is called by dev_ioc_read() & dev_ioc_write() functions.
[23]102// It builds and registers the command in the calling thread descriptor.
[614]103// Then, it registers the calling thead in IOC chdev waiting queue.
[407]104// Finally it blocks on the THREAD_BLOCKED_IO condition and deschedule.
[1]105////////////////////////////////////i/////////////////////////////////////////////
[23]106static error_t dev_ioc_access( uint32_t   cmd_type,
107                               uint8_t  * buffer,
108                               uint32_t   lba,
109                               uint32_t   count )
[1]110{
[3]111    thread_t * this = CURRENT_THREAD;              // pointer on client thread
[1]112
[605]113#if ( DEV_IOC_RX  || DEV_IOC_TX )
114uint32_t   cycle = (uint32_t)hal_get_cycles();
115#endif
116
[212]117    // software L2/L3 cache coherence for memory buffer
118    if( chdev_dir.iob )
[68]119    {
[614]120        if (cmd_type == IOC_READ) dev_mmc_inval( XPTR( local_cxy , buffer ) , count<<9 );
121        else                      dev_mmc_sync ( XPTR( local_cxy , buffer ) , count<<9 );
[68]122    }
[1]123
[3]124    // get extended pointer on IOC chdev descriptor
125    xptr_t  dev_xp = chdev_dir.ioc[0];
[1]126
[605]127// check dev_xp
128assert( (dev_xp != XPTR_NULL) , "undefined IOC chdev descriptor" );
[1]129
[3]130    // register command in calling thread descriptor
[279]131    this->ioc_cmd.dev_xp    = dev_xp;
132    this->ioc_cmd.type      = cmd_type;
133    this->ioc_cmd.buf_xp    = XPTR( local_cxy , buffer );
134    this->ioc_cmd.lba       = lba;
135    this->ioc_cmd.count     = count;
[1]136
[3]137    // register client thread in IOC chdev waiting queue, activate server thread,
[1]138    // block client thread on THREAD_BLOCKED_IO and deschedule.
139    // it is re-activated by the ISR signaling IO operation completion.
[407]140    chdev_register_command( dev_xp );
[1]141
[605]142#if(DEV_IOC_RX & 1)
143if( (DEV_IOC_RX < cycle) && (cmd_type != IOC_WRITE) )
144printk("\n[%s] thread[%x,%x] resumes for RX\n",
145__FUNCTION__, this->process->pid , this->trdid )
146#endif
147
148#if(DEV_IOC_TX & 1)
149if( (DEV_IOC_RX < cycle) && (cmd_type == IOC_WRITE) )
150printk("\n[%s] thread[%x,%x] resumes for TX\n",
151__FUNCTION__, this->process->pid , this->trdid )
152#endif
153
[1]154    // return I/O operation status
[279]155    return this->ioc_cmd.error;
[1]156
157}  // end dev_ioc_access()
158
159////////////////////////////////////////////
[23]160error_t dev_ioc_read( uint8_t      * buffer,
[1]161                      uint32_t       lba,
162                      uint32_t       count )
163{
[437]164
[438]165#if DEBUG_DEV_IOC_RX
[605]166uint32_t   cycle = (uint32_t)hal_get_cycles();
167thread_t * this  = CURRENT_THREAD;
[438]168if( DEBUG_DEV_IOC_RX < cycle )
[605]169printk("\n[%s] thread[%x,%x] enters / lba  %x / buffer %x / cycle %d\n",
170__FUNCTION__ , this->process->pid, this->trdid, lba, buffer, cycle );
[437]171#endif
172
[212]173    return dev_ioc_access( IOC_READ , buffer , lba , count );
174}
[1]175
176////////////////////////////////////////////
[23]177error_t dev_ioc_write( uint8_t     * buffer,
178                       uint32_t      lba,
179                       uint32_t      count )
[1]180{
[437]181
[438]182#if DEBUG_DEV_IOC_TX
[605]183uint32_t   cycle = (uint32_t)hal_get_cycles();
184thread_t * this  = CURRENT_THREAD;
[438]185if( DEBUG_DEV_IOC_TX < cycle )
[605]186printk("\n[%s] thread[%x,%x] enters / lba  %x / buffer %x / cycle %d\n",
187__FUNCTION__ , this->process->pid, this->trdid, lba, buffer, cycle );
[437]188#endif
189
[212]190    return dev_ioc_access( IOC_WRITE , buffer , lba , count );
[614]191}
[437]192
193
[23]194
[614]195
196
197//////////////////////////////////////////////////////////////////////////////////
198// This static function is called by dev_ioc_sync_read() & dev_ioc_sync_write().
199// It builds and registers the command in the calling thread descriptor, and
200// calls directly the blocking IOC driver command, that returns only when the
201// IO operation is completed.
202////////////////////////////////////i/////////////////////////////////////////////
203error_t dev_ioc_sync_access( uint32_t   cmd_type,
[626]204                             xptr_t     buffer_xp,
[614]205                             uint32_t   lba,
206                             uint32_t   count )
[23]207{
[212]208    // get pointer on calling thread
[23]209    thread_t * this = CURRENT_THREAD;
210
[212]211    // software L2/L3 cache coherence for memory buffer
[614]212    if( chdev_dir.iob )
213    {
[626]214        if (cmd_type == IOC_SYNC_READ) dev_mmc_inval( buffer_xp , count<<9 );
215        else                           dev_mmc_sync ( buffer_xp , count<<9 );
[614]216    }
[23]217
[212]218    // get extended pointer on IOC[0] chdev
[279]219    xptr_t  ioc_xp = chdev_dir.ioc[0];
[23]220
[614]221// check ioc_xp
222assert( (ioc_xp != XPTR_NULL) , "undefined IOC chdev descriptor" );
[23]223
224    // register command in calling thread descriptor
[279]225    this->ioc_cmd.dev_xp    = ioc_xp;
[614]226    this->ioc_cmd.type      = cmd_type;
[626]227    this->ioc_cmd.buf_xp    = buffer_xp;
[279]228    this->ioc_cmd.lba       = lba;
229    this->ioc_cmd.count     = count;
[23]230
[212]231    // get driver command function
[279]232    cxy_t       ioc_cxy = GET_CXY( ioc_xp );
[614]233    chdev_t   * ioc_ptr = GET_PTR( ioc_xp );
[279]234    dev_cmd_t * cmd = (dev_cmd_t *)hal_remote_lpt( XPTR( ioc_cxy , &ioc_ptr->cmd ) );
[23]235
[279]236    // get core local index for the core handling the IOC IRQ
237    thread_t * server = (thread_t *)hal_remote_lpt( XPTR( ioc_cxy , &ioc_ptr->server ) );
238    core_t   * core   = (core_t *)hal_remote_lpt( XPTR( ioc_cxy , &server->core ) );
[565]239    lid_t      lid    = (lid_t)hal_remote_l32( XPTR( ioc_cxy , &core->lid ) );
[279]240
[207]241    // mask the IRQ
[279]242    dev_pic_disable_irq( lid , ioc_xp );
[207]243
[279]244    // call driver function
[23]245    cmd( XPTR( local_cxy , this ) );
246
[207]247    // unmask the IRQ
[279]248    dev_pic_enable_irq( lid , ioc_xp );
[207]249
[614]250    // return I/O operation status from calling thread descriptor
251    return this->ioc_cmd.error;
252
[626]253}  // end dev_ioc_sync_access()
[614]254
[626]255////////////////////////////////////////////////
256error_t dev_ioc_sync_read( xptr_t     buffer_xp,
[614]257                           uint32_t   lba,
258                           uint32_t   count )
259{
260
[438]261#if DEBUG_DEV_IOC_RX
[614]262thread_t * this  = CURRENT_THREAD;
263uint32_t   cycle = (uint32_t)hal_get_cycles();
[438]264if( DEBUG_DEV_IOC_RX < cycle )
[626]265printk("\n[%s] thread[%x,%x] : lba  %x / buffer(%x,%x) / count %d / cycle %d\n",
266__FUNCTION__ , this->process->pid, this->trdid, 
267lba, GET_CXY(buffer_xp), GET_PTR(buffer_xp), count, cycle );
[437]268#endif
[279]269
[626]270    return dev_ioc_sync_access( IOC_SYNC_READ , buffer_xp , lba , count );
[614]271} 
[23]272
[626]273/////////////////////////////////////////////////
274error_t dev_ioc_sync_write( xptr_t     buffer_xp,
[614]275                            uint32_t   lba,
276                            uint32_t   count )
277{
[279]278
[626]279#if DEBUG_DEV_IOC_TX
[614]280thread_t * this  = CURRENT_THREAD;
281uint32_t   cycle = (uint32_t)hal_get_cycles();
[626]282if( DEBUG_DEV_IOC_TX < cycle )
283printk("\n[%s] thread[%x,%x] : lba  %x / buffer(%x,%x) / count %d / cycle %d\n",
284__FUNCTION__ , this->process->pid, this->trdid,
285lba, GET_CXY(buffer_xp), GET_PTR(buffer_xp), count, cycle );
[614]286#endif
287
[626]288    return dev_ioc_sync_access( IOC_SYNC_WRITE , buffer_xp , lba , count );
[614]289} 
290
Note: See TracBrowser for help on using the repository browser.