Changeset 76 for trunk/hal/x86_64/drivers/soclib_hba.c

Timestamp:

Jun 27, 2017, 2:07:55 PM (7 years ago)

Author:

max@…

Message:

empty out the x86 drivers

File:

• trunk/hal/x86_64/drivers/soclib_hba.c (modified) (1 diff)

trunk/hal/x86_64/drivers/soclib_hba.c

@@ -30 +30 @@
 #include <thread.h>
 
-//////////////////////////////////////////////////////////////////////////////////
-//   SOCLIB_HBA specific global variables
-//////////////////////////////////////////////////////////////////////////////////
-        
-// command list : up to 32 commands
-__attribute__((section(".kdata")))
-hba_cmd_desc_t     hba_cmd_list[32] __attribute__((aligned(0x40)));   
-
-// command tables array : one command table per entry in command list
-__attribute__((section(".kdata")))
-hba_cmd_table_t    hba_cmd_table[32] __attribute__((aligned(0x40))); 
-
-// extended pointer on the owner thread, for each slot
-__attribute__((section(".kdata")))
-xptr_t             hba_owner_thread[32];
-
-// bit vector of active slots
-__attribute__((section(".kdata")))
-uint32_t           hba_active_slots; 
-
-// spinlock protecting the command slot allocator
-__attribute__((section(".kdata")))
-spinlock_t         hba_lock;
-
-///////////////////////////////////////
 void soclib_hba_init( chdev_t * chdev )
 {
-    // get hardware device base address
-        xptr_t  hba_xp = chdev->base;
 
-    // get hardware device cluster and local pointer
-    cxy_t      hba_cxy  = GET_CXY( hba_xp );
-    uint32_t * hba_ptr  = (uint32_t *)GET_PTR( hba_xp );
+}
 
-    // get block_size and block_count  
-        uint32_t block_size  = hal_remote_lw( XPTR( hba_cxy , hba_ptr + HBA_BLOCK_SIZE_REG ) );
-        uint32_t block_count = hal_remote_lw( XPTR( hba_cxy , hba_ptr + HBA_BLOCK_COUNT_REG ) );
-
-    // set device descriptor extension
-    chdev->ext.ioc.size  = block_size;
-    chdev->ext.ioc.count = block_count;
-
-    // activate HBA interrupts 
-    hal_remote_sw( XPTR( hba_cxy , hba_ptr + HBA_PXIE_REG ) , 0x1 );
-
-        // reset SOCLIB_HBA driver global variable
-    hba_active_slots = 0;
-
-} // end soclib_hba_init()
-
-
-//////////////////////////////////////////////////////////////
 void __attribute__ ((noinline)) soclib_hba_cmd( xptr_t th_xp )
 {
 
-    uint32_t           cmd_type;     // IOC_READ / IOC_WRITE / IOC_SYNC_READ
-    uint32_t           lba;          // lba    : command argument
-    uint32_t           count;        // count  : command argument
-    xptr_t             buf_xp;       // buffer : command argument
-    xptr_t             dev_xp;       // device : command argument
+}
 
-    uint32_t           cmd_id;       // current slot index in command bit_vector
-    hba_cmd_desc_t   * cmd_desc;     // command descriptor pointer   
-    hba_cmd_table_t  * cmd_table;    // command table pointer
-
-    bool_t             found;
-    uint32_t           iter; 
-
-    // get client thread cluster and local pointer
-    cxy_t      th_cxy = GET_CXY( th_xp );
-    thread_t * th_ptr = (thread_t *)GET_PTR( th_xp );
-
-    // get command arguments and extended pointer on IOC device
-    cmd_type  =         hal_remote_lw ( XPTR( th_cxy , &th_ptr->command.ioc.type   ) );
-    lba       =         hal_remote_lw ( XPTR( th_cxy , &th_ptr->command.ioc.lba    ) );
-    count     =         hal_remote_lw ( XPTR( th_cxy , &th_ptr->command.ioc.count  ) );
-    buf_xp    = (xptr_t)hal_remote_lwd( XPTR( th_cxy , &th_ptr->command.ioc.buf_xp ) );
-    dev_xp    = (xptr_t)hal_remote_lwd( XPTR( th_cxy , &th_ptr->command.ioc.dev_xp ) );
-
-    // get IOC device cluster and local pointer
-    cxy_t     dev_cxy = GET_CXY( dev_xp );
-    chdev_t * dev_ptr = (chdev_t *)GET_PTR( dev_xp );
-
-    // get extended pointer on SOCLIB-HBA peripheral
-    xptr_t     hba_xp = hal_remote_lw( XPTR( dev_cxy , &dev_ptr->base ) );
-
-    // get SOCLIB_HBA device cluster and local pointer
-    cxy_t      hba_cxy = GET_CXY( hba_xp );
-    uint32_t * hba_ptr = (uint32_t *)GET_PTR( hba_xp );
-
-    // try to register the I/O operation in a free slot 
-    // returns if success, deschedule if no slot available
-    // we do not need a lock to access the slot allocator,
-    // because the driver is only called by the server thread.
-    while( 1 )
-    {
-        // try to find a free slot in the 32 slots command list
-        cmd_id = 0;
-        found  = false;
-        for ( iter = 0 ; iter < 32 ; iter++ )
-        {
-            if( (hba_active_slots & (1<<iter) ) == 0 )
-            {
-                found  = true;
-                cmd_id = iter;
-                hba_active_slots |= (1<<iter);
-                break;
-            }
-        }
-
-        if( found )  // slot available in SOCLIB_HBA 
-        {
-            // compute pointers on command descriptor and command table    
-            cmd_desc  = &hba_cmd_list[cmd_id];
-            cmd_table = &hba_cmd_table[cmd_id];
-
-            // set  buffer descriptor in command table 
-            cmd_table->buffer.dba  = (uint32_t)(buf_xp);   
-            cmd_table->buffer.dbau = (uint32_t)(buf_xp >> 32);
-            cmd_table->buffer.dbc  = count * 512;
-
-            // initialize command table header
-            cmd_table->header.lba0 = (char)lba;
-            cmd_table->header.lba1 = (char)(lba>>8);
-            cmd_table->header.lba2 = (char)(lba>>16);
-            cmd_table->header.lba3 = (char)(lba>>24);
-            cmd_table->header.lba4 = 0;
-            cmd_table->header.lba5 = 0;
-
-            // initialise command descriptor
-            cmd_desc->prdtl[0] = 1;
-            cmd_desc->prdtl[1] = 0;
-            if( cmd_type == IOC_WRITE ) cmd_desc->flag[0] = 0x40;
-            else                        cmd_desc->flag[0] = 0x00;     
-
-#if USE_IOB // software L2/L3 cache coherence 
-
-            dev_mmc_sync( cmd_table , sizeof(hba_cmd_table_t) );
-            dev_mmc_sync( cmd_desc , sizeof(hba_cmd_desc_t) );
-
-#endif // end software L2/L3 cache coherence
-
-            // set hba_owner_thread[slot] 
-            hba_owner_thread[cmd_id] = th_xp;
-
-            // register slot in bit_vector
-            hba_active_slots |= 1<<cmd_id;
- 
-            // set HBA_PXCI_REG to start transfer
-            hal_remote_sw( XPTR( hba_cxy , hba_ptr + HBA_PXCI_REG ) , 1<<cmd_id );
-
-            // exit the while 
-            break;
-        }
-        else   // no slot available in SOCLIB_HBA
-        {
-            if( cmd_type == IOC_SYNC_READ )     // fatal if synchronous access
-            {
-                printk("\n[PANIC] in %s : no slot available for a SYNC_READ\n", __FUNCTION__ );
-                hal_core_sleep();
-            }
-            else                                // retry if asynchronous access.
-            {
-                sched_yield();
-            }
-        }
-    }  // end while to get a slot
-
-    // waiting policy depends on the command type
-
-    if( cmd_type == IOC_SYNC_READ )                // polling, busy waiting
-    {
-        uint32_t  pxis;
-        uint32_t  pxci;
-        uint32_t  error;
-        uint32_t  fault_id;
-        while(1)
-        {
-            pxis     = hal_remote_lw( XPTR( hba_cxy , hba_ptr + HBA_PXIS_REG ) );
-            pxci     = hal_remote_lw( XPTR( hba_cxy , hba_ptr + HBA_PXCI_REG ) );
-            error    = (pxis & 0x40000000) >> 30;
-            fault_id = (pxis & 0x1F000000) >> 24;
-
-            if( (pxci & (1<<cmd_id)) == 0 )  // completed
-            {
-                // release slot
-                hba_active_slots &= ~(1<<cmd_id);
-
-                // set operation status in client thread command
-                if( error && (fault_id == cmd_id) ) 
-                {
-                    hal_remote_sw( XPTR( th_cxy , &th_ptr->command.ioc.error ) , 1 );
-                }
-                else
-                {
-                    hal_remote_sw( XPTR( th_cxy , &th_ptr->command.ioc.error ) , 0 );
-                }
-
-                // exit while
-                break;
-            }    
-        }
-    }
-    else                                           // descheduling + IRQ
-    {
-        thread_block( CURRENT_THREAD , THREAD_BLOCKED_DEV_ISR );
-        sched_yield();
-    }
-            
-} // end soclib_hba_cmd()
-
-
-/////////////////////////////////////////////////////////////////
 void __attribute__ ((noinline)) soclib_hba_isr( chdev_t * chdev )
 {
-    // get extended pointer on client thread
-    xptr_t root      = XPTR( local_cxy , &chdev->wait_root );
-    xptr_t client_xp = XLIST_FIRST_ELEMENT( root , thread_t , wait_list );
 
-    // get client thread cluster and local pointer
-    cxy_t      client_cxy = GET_CXY( client_xp );
-    thread_t * client_ptr = (thread_t *)GET_PTR( client_xp );
+}
 
-    // get SOCLIB_HBA device cluster and local pointer
-    cxy_t      hba_cxy  = GET_CXY( chdev->base );
-    uint32_t * hba_ptr  = (uint32_t *)GET_PTR( chdev->base );
-
-    // get HBA_PXIS_REG and HBA_PXCI_REG current values
-    uint32_t current_pxis = hal_remote_lw( XPTR( hba_cxy , hba_ptr + HBA_PXIS_REG ) );
-    uint32_t current_pxci = hal_remote_lw( XPTR( hba_cxy , hba_ptr + HBA_PXCI_REG ) );
-
-    uint32_t  error    = (current_pxis & 0x40000000) >> 30;
-    uint32_t  fault_id = (current_pxis & 0x1F000000) >> 24;
-    uint32_t  iter;
-
-    // loop on active commands to signal one or several completed I/O operations
-    for( iter = 0 ; iter < 32 ; iter++ )
-    {
-        if ( ( (hba_active_slots & (1<<iter)) != 0 ) &&  // active command
-             ( (current_pxci     & (1<<iter)) == 0 ) )   // completed command
-        {
-            // release the slot
-            hba_active_slots &= ~(1<<iter);
-
-            // set operation status in client thread command
-            if( error && (iter == fault_id ) ) 
-            {
-                hal_remote_sw( XPTR( client_cxy , &client_ptr->command.ioc.error ) , 1 );
-            }
-            else
-            {
-                hal_remote_sw( XPTR( client_cxy , &client_ptr->command.ioc.error ) , 0 );
-            }
-
-            // unblock client thread
-            thread_unblock( client_xp , THREAD_BLOCKED_IO );
- 
-            ioc_dmsg("INFO in %s : thread %x at cycle %d\n",
-            __FUNCTION__ , hal_remote_lw( XPTR( client_cxy , &client_ptr->trdid ) ) ,
-            hal_time_stamp() );
-        }
-    }
-
-    // reset HBA_PXIS_REG
-    hal_remote_sw( XPTR( hba_cxy , hba_ptr + HBA_PXIS_REG ) , 0 );
-
-} // end soclib_hba_isr()
-
-
-