/* * dev_ioc.c - IOC (Block Device Controler) generic device API implementation. * * Author Alain Greiner (2016,2017,2018,2019,2020) * * Copyright (c) UPMC Sorbonne Universites * * This file is part of ALMOS-MK * * ALMOS-MKH is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by * the Free Software Foundation; version 2.0 of the License. * * ALMOS-MKH is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with ALMOS-MKH; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #include #include #include #include #include #include #include #include ///////////////////////////////////////////////////////////////////////////////////////// // Extern global variables ///////////////////////////////////////////////////////////////////////////////////////// extern chdev_directory_t chdev_dir; // allocated in kernel_init.c //////////////////////////////////////////// char * dev_ioc_cmd_str( ioc_cmd_type_t cmd ) { if ( cmd == IOC_READ ) return "READ"; else if( cmd == IOC_WRITE ) return "WRITE"; else if( cmd == IOC_SYNC_READ ) return "SYNC_READ"; else if( cmd == IOC_SYNC_WRITE ) return "SYNC_WRITE"; else return "undefined"; } ////////////////////////////////// void dev_ioc_init( chdev_t * ioc ) { // get channel from chdev descriptor uint32_t channel = ioc->channel; // set chdev name snprintk( ioc->name , 16 , "ioc%d" , channel ); // call driver init function hal_drivers_ioc_init( ioc ); // select a core to execute the IOC server thread lid_t lid = cluster_select_local_core( local_cxy ); // bind the IOC IRQ to the selected core dev_pic_bind_irq( lid , ioc ); // enable IRQ dev_pic_enable_irq( lid , XPTR( local_cxy , ioc ) ); // create server thread thread_t * new_thread; error_t error; error = thread_kernel_create( &new_thread, THREAD_DEV, &chdev_server_func, ioc, lid ); assert( __FUNCTION__, (error == 0) , "cannot create server thread" ); // set "server" field in chdev descriptor ioc->server = new_thread; // set "chdev" field in thread descriptor new_thread->chdev = ioc; // unblock server thread thread_unblock( XPTR( local_cxy , new_thread ) , THREAD_BLOCKED_GLOBAL ); } // end dev_ioc_init() //////////////////////////////////////////////////////////////////////////////////// // This static function executes an asynchronous SYNC_READ or SYNC_WRITE request. // thread in the IOC device waiting queue, activates the server thread, blocks on // the THREAD_BLOCKED_IO condition and deschedules. // The clent is re-activated by the server thread after IO operation completion. //////////////////////////////////////////////////////////////////////////////////// static error_t dev_ioc_move( uint32_t cmd_type, xptr_t buffer_xp, uint32_t lba, uint32_t count ) { thread_t * this = CURRENT_THREAD; // pointer on client thread // get extended pointer on IOC chdev descriptor xptr_t ioc_xp = chdev_dir.ioc[0]; // check dev_xp assert( __FUNCTION__, (ioc_xp != XPTR_NULL) , "undefined IOC chdev descriptor" ); // register command in client thread this->ioc_cmd.dev_xp = ioc_xp; this->ioc_cmd.type = cmd_type; this->ioc_cmd.buf_xp = buffer_xp; this->ioc_cmd.lba = lba; this->ioc_cmd.count = count; // register client thread in IOC queue, blocks and deschedules chdev_register_command( ioc_xp ); // return I/O operation status return this->ioc_cmd.error; } // end dev_ioc_move() //////////////////////////////////////////////////////////////////////////////////// // This static function executes a synchronous READ or WRITE request. // It register the command in the client thread descriptor, and calls directly // the driver cmd function. //////////////////////////////////////////////////////////////////////////////////// error_t dev_ioc_sync_move( uint32_t cmd_type, xptr_t buffer_xp, uint32_t lba, uint32_t count ) { thread_t * this = CURRENT_THREAD; // pointer on client thread // get extended pointer on IOC chdev descriptor xptr_t ioc_xp = chdev_dir.ioc[0]; // check dev_xp assert( __FUNCTION__, (ioc_xp != XPTR_NULL) , "undefined IOC chdev descriptor" ); // register command in calling thread descriptor this->ioc_cmd.dev_xp = ioc_xp; this->ioc_cmd.type = cmd_type; this->ioc_cmd.buf_xp = buffer_xp; this->ioc_cmd.lba = lba; this->ioc_cmd.count = count; // get driver command function cxy_t ioc_cxy = GET_CXY( ioc_xp ); chdev_t * ioc_ptr = GET_PTR( ioc_xp ); dev_cmd_t * cmd = (dev_cmd_t *)hal_remote_lpt( XPTR( ioc_cxy , &ioc_ptr->cmd ) ); // call driver function whithout blocking & descheduling cmd( XPTR( local_cxy , this ) ); // return I/O operation status return this->ioc_cmd.error; } // end dev_ioc_sync_move() /////////////////////////////////////////// error_t dev_ioc_read( xptr_t buffer_xp, uint32_t lba, uint32_t count ) { #if DEBUG_DEV_IOC_RX thread_t * this = CURRENT_THREAD; uint32_t cycle = (uint32_t)hal_get_cycles(); if( DEBUG_DEV_IOC_RX < cycle ) printk("\n[%s] thread[%x,%x] enters IOC_READ / lba %x / buffer[%x,%x] / cycle %d\n", __FUNCTION__, this->process->pid, this->trdid, lba, GET_CXY(buffer_xp), GET_PTR(buffer_xp), cycle ); #endif // software L2/L3 cache coherence for memory buffer if( chdev_dir.iob ) dev_mmc_inval( buffer_xp , count<<9 ); // request an asynchronous transfer error_t error = dev_ioc_move( IOC_READ, buffer_xp, lba, count ); #if(DEBUG_DEV_IOC_RX & 1) cycle = (uint32_t)hal_get_cycles(); if( DEBUG_DEV_IOC_RX < cycle ) printk("\n[%s] thread[%x,%x] exit IOC_READ / cycle %d\n", __FUNCTION__, this->process->pid , this->trdid , cycle ); #endif return error; } // end dev_ioc_read() /////////////////////////////////////////// error_t dev_ioc_write( xptr_t buffer_xp, uint32_t lba, uint32_t count ) { #if DEBUG_DEV_IOC_TX thread_t * this = CURRENT_THREAD; uint32_t cycle = (uint32_t)hal_get_cycles(); if( DEBUG_DEV_IOC_TX < cycle ) printk("\n[%s] thread[%x,%x] enters IOC_WRITE / lba %x / buffer[%x,%x] / cycle %d\n", __FUNCTION__, this->process->pid, this->trdid, lba, GET_CXY(buffer_xp), GET_PTR(buffer_xp), cycle ); #endif // software L2/L3 cache coherence for memory buffer if( chdev_dir.iob ) dev_mmc_sync ( buffer_xp , count<<9 ); // request a blocking, but asynchronous, transfer error_t error = dev_ioc_move( IOC_WRITE, buffer_xp, lba, count ); #if(DEBUG_DEV_IOC_TX & 1) cycle = (uint32_t)hal_get_cycles(); if( DEBUG_DEV_IOC_TX < cycle ) printk("\n[%s] thread[%x,%x] exit IOC_WRITE / cycle %d\n", __FUNCTION__, this->process->pid , this->trdid , cycle ); #endif return error; } // end dev_ioc_write() /////////////////////////////////////////// error_t dev_ioc_sync_read( xptr_t buffer_xp, uint32_t lba, uint32_t count ) { #if DEBUG_DEV_IOC_RX thread_t * this = CURRENT_THREAD; uint32_t cycle = (uint32_t)hal_get_cycles(); if( DEBUG_DEV_IOC_RX < cycle ) printk("\n[%s] thread[%x,%x] enters IOC_SYNC_READ / lba %x / buffer[%x,%x] / cycle %d\n", __FUNCTION__, this->process->pid, this->trdid, lba, GET_CXY(buffer_xp), GET_PTR(buffer_xp), cycle ); #endif // software L2/L3 cache coherence for memory buffer if( chdev_dir.iob ) dev_mmc_inval( buffer_xp , count<<9 ); // request an asynchronous transfer error_t error = dev_ioc_sync_move( IOC_SYNC_READ, buffer_xp, lba, count ); #if(DEBUG_DEV_IOC_RX & 1) cycle = (uint32_t)hal_get_cycles(); if( DEBUG_DEV_IOC_RX < cycle ) printk("\n[%s] thread[%x,%x] exit IOC_SYNC_READ / cycle %d\n", __FUNCTION__, this->process->pid , this->trdid , cycle ); #endif return error; } // end dev_ioc_sync_read() ///////////////////////////////////////////////// error_t dev_ioc_sync_write( xptr_t buffer_xp, uint32_t lba, uint32_t count ) { #if DEBUG_DEV_IOC_TX thread_t * this = CURRENT_THREAD; uint32_t cycle = (uint32_t)hal_get_cycles(); if( DEBUG_DEV_IOC_TX < cycle ) printk("\n[%s] thread[%x,%x] enters IOC_SYNC_WRITE / lba %x / buffer[%x,%x] / cycle %d\n", __FUNCTION__, this->process->pid, this->trdid, lba, GET_CXY(buffer_xp), GET_PTR(buffer_xp), cycle ); #endif // software L2/L3 cache coherence for memory buffer if( chdev_dir.iob ) dev_mmc_sync ( buffer_xp , count<<9 ); // request a blocking, but asynchronous, transfer error_t error = dev_ioc_sync_move( IOC_SYNC_WRITE, buffer_xp, lba, count ); #if(DEBUG_DEV_IOC_TX & 1) cycle = (uint32_t)hal_get_cycles(); if( DEBUG_DEV_IOC_TX < cycle ) printk("\n[%s] thread[%x,%x] exit IOC_SYNC_WRITE / cycle %d\n", __FUNCTION__, this->process->pid , this->trdid , cycle ); #endif return error; } // end dev_ioc_sync_write()