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Copy pathssd-cache.cx
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executable file
·836 lines (836 loc) · 37 KB
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//-*-C-*-
/*******************************************************************************
* ___ public
* ¦OUX¦ C+
* ¦/C+¦ OUX/C+ OS
* --- kernel
* SSD Cache driver (ASWB)
*******************************************************************************/
#define E_ssd_cache_Q_trim_S_list_max ( 4096 / sizeof( struct E_sata_Z_dsm_range ))
//==============================================================================
struct E_ssd_cache_Z
{ N pba;
N count;
P data;
};
struct E_ssd_cache_Z_dirty
{ N pba;
N count;
};
//==============================================================================
_private volatile N8 E_ssd_cache_S_lock;
//==============================================================================
_private
N
E_ssd_cache_I_init( struct E_disc_Z *disc
){ disc->sata_ahci.ssd_cache_n = 0;
Mt_( disc->sata_ahci.ssd_cache, disc->sata_ahci.ssd_cache_n );
Kp( disc->sata_ahci.ssd_cache )
return ~0;
disc->sata_ahci.dirty_n = 0;
Mt_( disc->sata_ahci.dirty, disc->sata_ahci.dirty_n );
Kp( disc->sata_ahci.dirty )
{ K_( ~1, W( disc->sata_ahci.ssd_cache ));
return ~0;
}
disc->sata_ahci.trim_list_n = 0;
Mt_( disc->sata_ahci.trim_list, E_ssd_cache_Q_trim_S_list_max );
Kp( disc->sata_ahci.trim_list )
{ K_( ~1, W( disc->sata_ahci.dirty ));
K_( ~1, W( disc->sata_ahci.ssd_cache ));
return ~0;
}
_0( disc->sata_ahci.trim_list, E_ssd_cache_Q_trim_S_list_max * sizeof( *disc->sata_ahci.trim_list ));
return 0;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
_private
N
E_ssd_cache_P_dirty( struct E_disc_Z *disc
, N pba
, N count
){ if( disc->sata_ahci.dirty_n )
{ N min = 0;
N max = disc->sata_ahci.dirty_n - 1;
N dirty_i = max / 2;
O{ N dirty_start = disc->sata_ahci.dirty[ dirty_i ].pba;
N dirty_end = disc->sata_ahci.dirty[ dirty_i ].pba + disc->sata_ahci.dirty[ dirty_i ].count;
if( pba >= dirty_start
&& pba < dirty_end
) // Początek żądanego sektora jest wewnątrz bloku ‘dirty’.
break;
if( dirty_start > pba )
{ if( dirty_i == min )
{ if( dirty_i + 1 != disc->sata_ahci.dirty_n
&& disc->sata_ahci.dirty[ dirty_i + 1 ].pba <= pba + count
)
{ disc->sata_ahci.dirty[ dirty_i + 1 ].count += disc->sata_ahci.dirty[ dirty_i + 1 ].pba - pba;
disc->sata_ahci.dirty[ dirty_i + 1 ].pba = pba;
dirty_i++;
}else
{ Kp( E_mem_Q_blk_I_insert( &disc->sata_ahci.dirty, dirty_i, 1 ))
return ~0;
disc->sata_ahci.dirty_n++;
disc->sata_ahci.dirty[ dirty_i ].pba = pba;
disc->sata_ahci.dirty[ dirty_i ].count = 0;
}
break;
}
max = dirty_i - 1;
dirty_i = max - ( dirty_i - min ) / 2;
}else
{ if( dirty_i == max )
{ dirty_i++;
if( dirty_i != disc->sata_ahci.dirty_n
&& dirty_i + 1 != disc->sata_ahci.dirty_n
&& disc->sata_ahci.dirty[ dirty_i + 1 ].pba <= pba + count
)
{ disc->sata_ahci.dirty[ dirty_i + 1 ].count += disc->sata_ahci.dirty[ dirty_i + 1 ].pba - pba;
disc->sata_ahci.dirty[ dirty_i + 1 ].pba = pba;
dirty_i++;
}else
{ Kp( E_mem_Q_blk_I_insert( &disc->sata_ahci.dirty, dirty_i, 1 ))
return ~0;
disc->sata_ahci.dirty_n++;
disc->sata_ahci.dirty[ dirty_i ].pba = pba;
disc->sata_ahci.dirty[ dirty_i ].count = 0;
}
break;
}
min = dirty_i + 1;
dirty_i = min + ( max - dirty_i ) / 2;
}
}
N dirty_i_last = dirty_i;
while( dirty_i_last + 1 != disc->sata_ahci.dirty_n
&& disc->sata_ahci.dirty[ dirty_i_last + 1 ].pba <= pba + count
) // Dopóki następny blok rozpoczyna się wewnątrz lub przylega do żądanego zakresu.
dirty_i_last++;
if( dirty_i != dirty_i_last )
{ N dirty_i_0 = dirty_i;
N dirty_start, dirty_end;
do
{ dirty_start = disc->sata_ahci.dirty[ dirty_i + 1 ].pba;
dirty_end = disc->sata_ahci.dirty[ dirty_i + 1 ].pba + disc->sata_ahci.dirty[ dirty_i + 1 ].count;
N write_count = dirty_start - ( disc->sata_ahci.dirty[ dirty_i ].pba + disc->sata_ahci.dirty[ dirty_i ].count );
disc->sata_ahci.dirty[ dirty_i_0 ].count += write_count;
N copy_count = dirty_end - dirty_start;
disc->sata_ahci.dirty[ dirty_i_0 ].count += copy_count;
dirty_i++;
}while( dirty_i != dirty_i_last );
if( dirty_end < pba + count )
{ N write_count = pba + count - dirty_end;
disc->sata_ahci.dirty[ dirty_i_0 ].count += write_count;
}
Kp( E_mem_Q_blk_I_remove( &disc->sata_ahci.dirty, dirty_i_0 + 1, dirty_i_last - dirty_i_0 ))
return ~2;
disc->sata_ahci.dirty_n -= dirty_i_last - dirty_i_0;
}else
{ N dirty_end = disc->sata_ahci.dirty[ dirty_i ].pba + disc->sata_ahci.dirty[ dirty_i ].count;
if( dirty_end < pba + count )
{ N write_count = pba + count - dirty_end;
disc->sata_ahci.dirty[ dirty_i ].count += write_count;
}
}
}else
{ Kp( E_mem_Q_blk_I_append( &disc->sata_ahci.dirty, 1 ))
return ~0;
disc->sata_ahci.dirty_n++;
disc->sata_ahci.dirty[0].pba = pba;
disc->sata_ahci.dirty[0].count = count;
}
return 0;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//DFN Procedury ‘read’/‘write’ — jeśli zakończyły się bez błędu — to nie zwalniają ‘lock’. Trzeba go zwolnić po wykonaniu operacji na danych: “E_flow_I_unlock_r( &disc->sata_ahci.ssd_cache_lock, &r_ssd_cache, r_ );”.
_private
void
E_ssd_cache_R( I disc_id
, N pba
, N count
, P *data //DFN Adres do danych w ‘cache’.
, volatile N *r
){ *r = 0;
struct E_disc_Z *disc = E_mem_Q_tab_R( E_disc_S, disc_id );
E_flow_I_lock( &disc->sata_ahci.ssd_cache_lock );
if( K_error( *r ))
return;
N32 slot_mask = 0;
if( disc->sata_ahci.ssd_cache_n )
{ N min = 0;
N max = disc->sata_ahci.ssd_cache_n - 1;
N cache_i = max / 2;
O{ N cache_start = disc->sata_ahci.ssd_cache[ cache_i ].pba;
N cache_end = disc->sata_ahci.ssd_cache[ cache_i ].pba + disc->sata_ahci.ssd_cache[ cache_i ].count;
if( pba >= cache_start
&& pba < cache_end
) // Początek żądanego sektora jest wewnątrz bloku ‘cache’.
break;
if( cache_start > pba )
{ if( cache_i == min )
{ N r_ = (N)E_mem_Q_blk_I_insert( &disc->sata_ahci.ssd_cache, cache_i, 1 );
if( K_error( r_ )
|| !r_
)
{ if( K_error( r_ ))
{ if( r_ == ~4 )
Gk(E_mem_Q_blk_I_insert( &disc->sata_ahci.ssd_cache, cache_i, 1 ));
*r = r_ < ~2 ? r_ : ~2;
goto End;
}
*r = ~0;
goto End;
}
disc->sata_ahci.ssd_cache[ cache_i ].data = Mt( disc->sata_ahci.physical_sector_size, 0 );
if( K_error( disc->sata_ahci.ssd_cache[ cache_i ].data )
|| !disc->sata_ahci.ssd_cache[ cache_i ].data
)
{ N r_ = (N)E_mem_Q_blk_I_remove( &disc->sata_ahci.ssd_cache, cache_i, 1 );
if( K_error( r_ )
|| !r_
)
{ if( K_error( r_ ))
{ if( r_ == ~4 )
Gk(E_mem_Q_blk_I_remove( &disc->sata_ahci.ssd_cache, cache_i, 1 ));
*r = r_ < ~2 ? r_ : ~2;
goto End;
}
}
*r = ~0;
goto End;
}
disc->sata_ahci.ssd_cache_n++;
disc->sata_ahci.ssd_cache[ cache_i ].pba = pba;
disc->sata_ahci.ssd_cache[ cache_i ].count = 0;
break;
}
max = cache_i - 1;
cache_i = max - ( cache_i - min ) / 2;
}else
{ if( cache_i == max )
{ cache_i++;
N r_ = (N)E_mem_Q_blk_I_insert( &disc->sata_ahci.ssd_cache, cache_i, 1 );
if( K_error( r_ )
|| !r_
)
{ if( K_error( r_ ))
{ if( r_ == ~4 )
Gk(E_mem_Q_blk_I_insert( &disc->sata_ahci.ssd_cache, cache_i, 1 ));
*r = r_ < ~2 ? r_ : ~2;
goto End;
}
*r = ~0;
goto End;
}
disc->sata_ahci.ssd_cache[ cache_i ].data = Mt( disc->sata_ahci.physical_sector_size, 0 );
if( K_error( disc->sata_ahci.ssd_cache[ cache_i ].data )
|| !disc->sata_ahci.ssd_cache[ cache_i ].data
)
{ N r_ = (N)E_mem_Q_blk_I_remove( &disc->sata_ahci.ssd_cache, cache_i, 1 );
if( K_error( r_ )
|| !r_
)
{ if( K_error( r_ ))
{ if( r_ == ~4 )
Gk(E_mem_Q_blk_I_remove( &disc->sata_ahci.ssd_cache, cache_i, 1 ));
*r = r_ < ~2 ? r_ : ~2;
goto End;
}
}
*r = ~0;
goto End;
}
disc->sata_ahci.ssd_cache_n++;
disc->sata_ahci.ssd_cache[ cache_i ].pba = pba;
disc->sata_ahci.ssd_cache[ cache_i ].count = 0;
break;
}
min = cache_i + 1;
cache_i = min + ( max - cache_i ) / 2;
}
}
N cache_i_last = cache_i;
while( cache_i_last + 1 != disc->sata_ahci.ssd_cache_n
&& disc->sata_ahci.ssd_cache[ cache_i_last + 1 ].pba <= pba + count
) // Dopóki następny blok rozpoczyna się wewnątrz lub przylega do żądanego zakresu.
cache_i_last++;
if( cache_i != cache_i_last )
{ N r_ = (N)E_mem_Q_blk_I_append_align( &disc->sata_ahci.ssd_cache[ cache_i ].data
, J_max( pba + count, disc->sata_ahci.ssd_cache[ cache_i_last ].pba + disc->sata_ahci.ssd_cache[ cache_i_last ].count )
- ( disc->sata_ahci.ssd_cache[ cache_i ].pba + disc->sata_ahci.ssd_cache[ cache_i ].count )
, 4096
);
if( K_error( r_ )
|| !r_
)
{ if( r_ == ~4 )
Gk(E_mem_Q_blk_I_append_align( &disc->sata_ahci.ssd_cache[ cache_i ].data, J_max( pba + count, disc->sata_ahci.ssd_cache[ cache_i_last ].pba + disc->sata_ahci.ssd_cache[ cache_i_last ].count ) - ( disc->sata_ahci.ssd_cache[ cache_i ].pba + disc->sata_ahci.ssd_cache[ cache_i ].count ), 4096 ));
*r = (S)r_ < ~2 ? r_ : ~2;
goto End;
}
N cache_i_0 = cache_i;
N cache_start, cache_end;
do
{ cache_start = disc->sata_ahci.ssd_cache[ cache_i + 1 ].pba;
cache_end = disc->sata_ahci.ssd_cache[ cache_i + 1 ].pba + disc->sata_ahci.ssd_cache[ cache_i + 1 ].count;
N read_count = cache_start - ( disc->sata_ahci.ssd_cache[ cache_i ].pba + disc->sata_ahci.ssd_cache[ cache_i ].count );
*r = E_sata_Q_sata_ahci_I_read( disc_id
, disc->sata_ahci.logical_sector_shift + pba * disc->sata_ahci.physical_sector_size / disc->sata_ahci.logical_sector_size
, read_count * disc->sata_ahci.physical_sector_size / disc->sata_ahci.logical_sector_size
, disc->sata_ahci.ssd_cache[ cache_i_0 ].data + disc->sata_ahci.ssd_cache[ cache_i_0 ].count * disc->sata_ahci.physical_sector_size
, &slot_mask
);
if( K_error( *r ))
{ if( *r > ~2 )
*r = ~2;
goto End;
}
disc = E_mem_Q_tab_R( E_disc_S, disc_id );
disc->sata_ahci.ssd_cache[ cache_i_0 ].count += read_count;
N copy_count = cache_end - cache_start;
E_mem_Q_blk_I_copy( disc->sata_ahci.ssd_cache[ cache_i_0 ].data + disc->sata_ahci.ssd_cache[ cache_i_0 ].count * disc->sata_ahci.physical_sector_size
, disc->sata_ahci.ssd_cache[ cache_i + 1 ].data
, copy_count * disc->sata_ahci.physical_sector_size
);
disc->sata_ahci.ssd_cache[ cache_i_0 ].count += copy_count;
*r = W( disc->sata_ahci.ssd_cache[ cache_i + 1 ].data );
if( K_error( *r ))
{ if( *r > ~2 )
*r = ~2;
goto End;
}
cache_i++;
}while( cache_i != cache_i_last );
if( cache_end < pba + count )
{ N read_count = pba + count - cache_end;
*r = E_sata_Q_sata_ahci_I_read( disc_id
, disc->sata_ahci.logical_sector_shift + pba * disc->sata_ahci.physical_sector_size / disc->sata_ahci.logical_sector_size
, read_count * disc->sata_ahci.physical_sector_size / disc->sata_ahci.logical_sector_size
, disc->sata_ahci.ssd_cache[ cache_i_0 ].data + disc->sata_ahci.ssd_cache[ cache_i_0 ].count * disc->sata_ahci.physical_sector_size
, &slot_mask
);
if( K_error( *r ))
{ if( *r > ~2 )
*r = ~2;
goto End;
}
disc = E_mem_Q_tab_R( E_disc_S, disc_id );
disc->sata_ahci.ssd_cache[ cache_i_0 ].count += read_count;
}
r_ = (N)E_mem_Q_blk_I_remove( &disc->sata_ahci.ssd_cache, cache_i_0 + 1, cache_i_last - cache_i_0 );
if( K_error( r_ )
|| !r_
)
{ if( r_ == ~4 )
Gk(E_mem_Q_blk_I_remove( &disc->sata_ahci.ssd_cache, cache_i_0 + 1, cache_i_last - cache_i_0 ));
*r = (S)r_ < ~2 ? r_ : ~2;
goto End;
}
disc->sata_ahci.ssd_cache_n -= cache_i_last - cache_i_0;
*data = disc->sata_ahci.ssd_cache[ cache_i_0 ].data + ( pba - disc->sata_ahci.ssd_cache[ cache_i_0 ].pba ) * disc->sata_ahci.physical_sector_size;
}else
{ N cache_end = disc->sata_ahci.ssd_cache[ cache_i ].pba + disc->sata_ahci.ssd_cache[ cache_i ].count;
if( cache_end < pba + count )
{ N r_ = (N)E_mem_Q_blk_I_append_align( &disc->sata_ahci.ssd_cache[ cache_i ].data
, pba + count - cache_end
, 4096
);
if( K_error( r_ )
|| !r_
)
{ if( r_ == ~4 )
Gk(E_mem_Q_blk_I_append_align( &disc->sata_ahci.ssd_cache[ cache_i ].data, pba + count - cache_end, 4096 ));
*r = (S)r_ < ~2 ? r_ : ~2;
goto End;
}
N read_count = pba + count - cache_end;
*r = E_sata_Q_sata_ahci_I_read( disc_id
, disc->sata_ahci.logical_sector_shift + pba * disc->sata_ahci.physical_sector_size / disc->sata_ahci.logical_sector_size
, read_count * disc->sata_ahci.physical_sector_size / disc->sata_ahci.logical_sector_size
, disc->sata_ahci.ssd_cache[ cache_i ].data + disc->sata_ahci.ssd_cache[ cache_i ].count * disc->sata_ahci.physical_sector_size
, &slot_mask
);
if( K_error( *r ))
{ if( *r > ~2 )
*r = ~2;
goto End;
}
disc = E_mem_Q_tab_R( E_disc_S, disc_id );
disc->sata_ahci.ssd_cache[ cache_i ].count += read_count;
}
*data = disc->sata_ahci.ssd_cache[ cache_i ].data + ( pba - disc->sata_ahci.ssd_cache[ cache_i ].pba ) * disc->sata_ahci.physical_sector_size;
}
}else
{ N r_ = (N)E_mem_Q_blk_I_append( &disc->sata_ahci.ssd_cache, 1 );
if( K_error( r_ )
|| !r_
)
{ if( K_error( r_ ))
{ if( r_ == ~4 )
Gk(E_mem_Q_blk_I_append( &disc->sata_ahci.ssd_cache, 1 ));
*r = r_ < ~2 ? r_ : ~2;
goto End;
}
*r = ~0;
goto End;
}
disc->sata_ahci.ssd_cache[0].data = E_mem_Q_blk_M_align_tab( disc->sata_ahci.physical_sector_size, count, 4096 );
if( !disc->sata_ahci.ssd_cache[0].data )
{ N r_ = (N)E_mem_Q_blk_I_remove( &disc->sata_ahci.ssd_cache, 0, 1 );
if( K_error( r_ )
|| !r_
)
{ if( K_error( r_ ))
{ Gk(E_mem_Q_blk_I_remove( &disc->sata_ahci.ssd_cache, 0, 1 ));
*r = r_ < ~2 ? r_ : ~2;
goto End;
}
}
*r = ~0;
goto End;
}
*r = E_sata_Q_sata_ahci_I_read( disc_id
, disc->sata_ahci.logical_sector_shift + pba * disc->sata_ahci.physical_sector_size / disc->sata_ahci.logical_sector_size
, count * disc->sata_ahci.physical_sector_size / disc->sata_ahci.logical_sector_size
, disc->sata_ahci.ssd_cache[0].data
, &slot_mask
);
if( K_error( *r ))
{ if( *r > ~2 )
*r = ~2;
goto End;
}
disc = E_mem_Q_tab_R( E_disc_S, disc_id );
disc->sata_ahci.ssd_cache_n++;
disc->sata_ahci.ssd_cache[0].pba = pba;
disc->sata_ahci.ssd_cache[0].count = count;
*data = disc->sata_ahci.ssd_cache[0].data;
}
*r = E_sata_Q_sata_ahci_I_wait_on_completion( disc, slot_mask );
if( K_error( *r ))
if( *r > ~2 )
*r = ~2;
if( *r )
End: E_flow_I_unlock_r( &disc->sata_ahci.ssd_cache_lock, r, *r );
return;
}
// Ta procedura jest potrzebna tylko wtedy, gdy zapisujemy cały blok; nie czytamy wcześniej.
_private
void
E_ssd_cache_P( I disc_id
, N pba
, N count
, P *data //DFN Adres do danych w ‘cache’.
, volatile N *r
){ *r = 0;
struct E_disc_Z *disc = E_mem_Q_tab_R( E_disc_S, disc_id );
E_flow_I_lock( &disc->sata_ahci.ssd_cache_lock );
if( K_error( *r ))
return;
if( disc->sata_ahci.ssd_cache_n )
{ N min = 0;
N max = disc->sata_ahci.ssd_cache_n - 1;
N cache_i = max / 2;
O{ N cache_start = disc->sata_ahci.ssd_cache[ cache_i ].pba;
N cache_end = disc->sata_ahci.ssd_cache[ cache_i ].pba + disc->sata_ahci.ssd_cache[ cache_i ].count;
if( pba >= cache_start
&& pba < cache_end
) // Początek żądanego sektora jest wewnątrz bloku ‘cache’.
break;
if( cache_start > pba )
{ if( cache_i == min )
{ N r_ = (N)E_mem_Q_blk_I_insert( &disc->sata_ahci.ssd_cache, cache_i, 1 );
if( K_error( r_ )
|| !r_
)
{ if( K_error( r_ ))
{ if( r_ == ~4 )
Gk(E_mem_Q_blk_I_insert( &disc->sata_ahci.ssd_cache, cache_i, 1 ));
*r = r_ < ~2 ? r_ : ~2;
goto End;
}
*r = ~0;
goto End;
}
disc->sata_ahci.ssd_cache[ cache_i ].data = Mt( disc->sata_ahci.physical_sector_size, 0 );
if( K_error( disc->sata_ahci.ssd_cache[ cache_i ].data )
|| !disc->sata_ahci.ssd_cache[ cache_i ].data
)
{ N r_ = (N)E_mem_Q_blk_I_remove( &disc->sata_ahci.ssd_cache, cache_i, 1 );
if( K_error( r_ )
|| !r_
)
{ if( K_error( r_ ))
{ if( r_ == ~4 )
Gk(E_mem_Q_blk_I_remove( &disc->sata_ahci.ssd_cache, cache_i, 1 ));
*r = r_ < ~2 ? r_ : ~2;
goto End;
}
}
*r = ~0;
goto End;
}
disc->sata_ahci.ssd_cache_n++;
disc->sata_ahci.ssd_cache[ cache_i ].pba = pba;
disc->sata_ahci.ssd_cache[ cache_i ].count = 0;
break;
}
max = cache_i - 1;
cache_i = max - ( cache_i - min ) / 2;
}else
{ if( cache_i == max )
{ cache_i++;
N r_ = (N)E_mem_Q_blk_I_insert( &disc->sata_ahci.ssd_cache, cache_i, 1 );
if( K_error( r_ )
|| !r_
)
{ if( K_error( r_ ))
{ if( r_ == ~4 )
Gk(E_mem_Q_blk_I_insert( &disc->sata_ahci.ssd_cache, cache_i, 1 ));
*r = r_ < ~2 ? r_ : ~2;
goto End;
}
*r = ~0;
goto End;
}
disc->sata_ahci.ssd_cache[ cache_i ].data = Mt( disc->sata_ahci.physical_sector_size, 0 );
if( K_error( disc->sata_ahci.ssd_cache[ cache_i ].data )
|| !disc->sata_ahci.ssd_cache[ cache_i ].data
)
{ N r_ = (N)E_mem_Q_blk_I_remove( &disc->sata_ahci.ssd_cache, cache_i, 1 );
if( K_error( r_ )
|| !r_
)
{ if( K_error( r_ ))
{ if( r_ == ~4 )
Gk(E_mem_Q_blk_I_remove( &disc->sata_ahci.ssd_cache, cache_i, 1 ));
*r = r_ < ~2 ? r_ : ~2;
goto End;
}
}
*r = ~0;
goto End;
}
disc->sata_ahci.ssd_cache_n++;
disc->sata_ahci.ssd_cache[ cache_i ].pba = pba;
disc->sata_ahci.ssd_cache[ cache_i ].count = 0;
break;
}
min = cache_i + 1;
cache_i = min + ( max - cache_i ) / 2;
}
}
N cache_i_last = cache_i;
while( cache_i_last + 1 != disc->sata_ahci.ssd_cache_n
&& disc->sata_ahci.ssd_cache[ cache_i_last + 1 ].pba <= pba + count
) // Dopóki następny blok rozpoczyna się wewnątrz lub przylega do żądanego zakresu.
cache_i_last++;
if( cache_i != cache_i_last )
{ N r_ = (N)E_mem_Q_blk_I_append_align( &disc->sata_ahci.ssd_cache[ cache_i ].data
, J_max( pba + count, disc->sata_ahci.ssd_cache[ cache_i_last ].pba + disc->sata_ahci.ssd_cache[ cache_i_last ].count )
- ( disc->sata_ahci.ssd_cache[ cache_i ].pba + disc->sata_ahci.ssd_cache[ cache_i ].count )
, 4096
);
if( K_error( r_ )
|| !r_
)
{ if( r_ == ~4 )
Gk(E_mem_Q_blk_I_append_align( &disc->sata_ahci.ssd_cache[ cache_i ].data, J_max( pba + count, disc->sata_ahci.ssd_cache[ cache_i_last ].pba + disc->sata_ahci.ssd_cache[ cache_i_last ].count ) - ( disc->sata_ahci.ssd_cache[ cache_i ].pba + disc->sata_ahci.ssd_cache[ cache_i ].count ), 4096 ));
*r = (S)r_ < ~2 ? r_ : ~2;
goto End;
}
N cache_i_0 = cache_i;
N cache_start, cache_end;
do
{ cache_start = disc->sata_ahci.ssd_cache[ cache_i + 1 ].pba;
cache_end = disc->sata_ahci.ssd_cache[ cache_i + 1 ].pba + disc->sata_ahci.ssd_cache[ cache_i + 1 ].count;
N write_count = cache_start - ( disc->sata_ahci.ssd_cache[ cache_i ].pba + disc->sata_ahci.ssd_cache[ cache_i ].count );
disc->sata_ahci.ssd_cache[ cache_i_0 ].count += write_count;
N copy_count = cache_end - cache_start;
E_mem_Q_blk_I_copy( disc->sata_ahci.ssd_cache[ cache_i_0 ].data + disc->sata_ahci.ssd_cache[ cache_i_0 ].count * disc->sata_ahci.physical_sector_size
, disc->sata_ahci.ssd_cache[ cache_i + 1 ].data
, copy_count * disc->sata_ahci.physical_sector_size
);
disc->sata_ahci.ssd_cache[ cache_i_0 ].count += copy_count;
*r = W( disc->sata_ahci.ssd_cache[ cache_i + 1 ].data );
if( K_error( *r ))
{ if( *r > ~2 )
*r = ~2;
goto End;
}
cache_i++;
}while( cache_i != cache_i_last );
if( cache_end < pba + count )
{ N write_count = pba + count - cache_end;
disc->sata_ahci.ssd_cache[ cache_i_0 ].count += write_count;
}
r_ = (N)E_mem_Q_blk_I_remove( &disc->sata_ahci.ssd_cache, cache_i_0 + 1, cache_i_last - cache_i_0 );
if( K_error( r_ )
|| !r_
)
{ if( r_ == ~4 )
Gk(E_mem_Q_blk_I_remove( &disc->sata_ahci.ssd_cache, cache_i_0 + 1, cache_i_last - cache_i_0 ));
*r = (S)r_ < ~2 ? r_ : ~2;
goto End;
}
disc->sata_ahci.ssd_cache_n -= cache_i_last - cache_i_0;
*data = disc->sata_ahci.ssd_cache[ cache_i_0 ].data + ( pba - disc->sata_ahci.ssd_cache[ cache_i_0 ].pba ) * disc->sata_ahci.physical_sector_size;
}else
{ N cache_end = disc->sata_ahci.ssd_cache[ cache_i ].pba + disc->sata_ahci.ssd_cache[ cache_i ].count;
if( cache_end < pba + count )
{ N r_ = (N)E_mem_Q_blk_I_append_align( &disc->sata_ahci.ssd_cache[ cache_i ].data
, pba + count - cache_end
, 4096
);
if( K_error( r_ )
|| !r_
)
{ if( r_ == ~4 )
Gk(E_mem_Q_blk_I_append_align( &disc->sata_ahci.ssd_cache[ cache_i ].data, pba + count - cache_end, 4096));
*r = (S)r_ < ~2 ? r_ : ~2;
goto End;
}
N write_count = pba + count - cache_end;
disc->sata_ahci.ssd_cache[ cache_i ].count += write_count;
}
*data = disc->sata_ahci.ssd_cache[ cache_i ].data + ( pba - disc->sata_ahci.ssd_cache[ cache_i ].pba ) * disc->sata_ahci.physical_sector_size;
}
}else
{ N r_ = (N)E_mem_Q_blk_I_append( &disc->sata_ahci.ssd_cache, 1 );
if( K_error( r_ )
|| !r_
)
{ if( K_error( r_ ))
{ if( r_ == ~4 )
Gk(E_mem_Q_blk_I_append( &disc->sata_ahci.ssd_cache, 1 ));
*r = r_ < ~2 ? r_ : ~2;
goto End;
}
*r = ~0;
goto End;
}
disc->sata_ahci.ssd_cache[0].data = E_mem_Q_blk_M_align_tab( disc->sata_ahci.physical_sector_size, count, 4096 );
if( !disc->sata_ahci.ssd_cache[0].data )
{ N r_ = (N)E_mem_Q_blk_I_remove( &disc->sata_ahci.ssd_cache, 0, 1 );
if( K_error( r_ )
|| !r_
)
{ if( K_error( r_ ))
{ if( r_ == ~4 )
Gk(E_mem_Q_blk_I_remove( &disc->sata_ahci.ssd_cache, 0, 1 ));
*r = r_ < ~2 ? r_ : ~2;
goto End;
}
}
*r = ~0;
goto End;
}
disc->sata_ahci.ssd_cache_n++;
disc->sata_ahci.ssd_cache[0].pba = pba;
disc->sata_ahci.ssd_cache[0].count = count;
*data = disc->sata_ahci.ssd_cache[0].data;
}
if( *r )
End: E_flow_I_unlock_r( &disc->sata_ahci.ssd_cache_lock, r, *r );
return;
}
_private
N
E_ssd_cache_P_trim( I disc_id
, N pba
, N count
){ volatile N r;
r = 0;
struct E_disc_Z *disc = E_mem_Q_tab_R( E_disc_S, disc_id );
if( !disc->sata_ahci.trim )
return 0;
E_flow_I_lock( &disc->sata_ahci.ssd_cache_lock );
if( K_error(r) )
return r;
if( disc->sata_ahci.ssd_cache_n )
{ N min = 0;
N max = disc->sata_ahci.ssd_cache_n - 1;
N cache_i = max / 2;
O{ N cache_start = disc->sata_ahci.ssd_cache[ cache_i ].pba;
N cache_end = disc->sata_ahci.ssd_cache[ cache_i ].pba + disc->sata_ahci.ssd_cache[ cache_i ].count;
if( pba >= cache_start
&& pba < cache_end
) // Początek żądanego sektora jest wewnątrz bloku ‘cache’.
{ if( cache_start < pba )
{ disc->sata_ahci.ssd_cache[ cache_i ].count = pba - cache_start;
cache_i++;
}
break;
}
if( cache_start > pba )
{ if( cache_i == min )
break;
max = cache_i - 1;
cache_i = max - ( cache_i - min ) / 2;
}else
{ if( cache_i == max )
{ cache_i++;
break;
}
min = cache_i + 1;
cache_i = min + ( max - cache_i ) / 2;
}
}
N cache_i_last = cache_i;
while( cache_i_last != disc->sata_ahci.ssd_cache_n
&& disc->sata_ahci.ssd_cache[ cache_i_last ].pba < pba + count
) // Dopóki następny blok rozpoczyna się wewnątrz żądanego zakresu.
cache_i_last++;
if( cache_i != cache_i_last )
{ cache_i_last--;
if( disc->sata_ahci.ssd_cache[ cache_i_last ].pba + disc->sata_ahci.ssd_cache[ cache_i_last ].count > pba + count )
{ disc->sata_ahci.ssd_cache[ cache_i_last ].count = disc->sata_ahci.ssd_cache[ cache_i_last ].pba + disc->sata_ahci.ssd_cache[ cache_i_last ].count - ( pba + count );
disc->sata_ahci.ssd_cache[ cache_i_last ].pba = pba + count;
if( cache_i == cache_i_last )
goto End_1;
cache_i_last--;
}
if( !E_mem_Q_blk_I_remove( &disc->sata_ahci.ssd_cache, cache_i, cache_i_last - cache_i + 1 ))
{ r = ~2;
goto End;
}
disc->sata_ahci.ssd_cache_n -= cache_i_last - cache_i + 1;
}
}
End_1:
disc->sata_ahci.trim_list[ disc->sata_ahci.trim_list_n ].lba = pba * disc->sata_ahci.logical_sector_size / disc->sata_ahci.physical_sector_size;
disc->sata_ahci.trim_list[ disc->sata_ahci.trim_list_n ].count = count * disc->sata_ahci.logical_sector_size / disc->sata_ahci.physical_sector_size;
disc->sata_ahci.trim_list_n++;
if( disc->sata_ahci.trim_list_n == E_ssd_cache_Q_trim_S_list_max )
{ N32 slot_mask = 0;
r = E_sata_Q_sata_ahci_I_trim( disc_id
, disc->sata_ahci.trim_list
, E_ssd_cache_Q_trim_S_list_max * sizeof( *disc->sata_ahci.trim_list ) / disc->sata_ahci.logical_sector_size
, &slot_mask
);
if( K_error(r) )
{ if( r > ~2 )
r = ~2;
goto End;
}
disc->sata_ahci.trim_list_n = 0;
r = E_sata_Q_sata_ahci_I_wait_on_completion( disc, slot_mask );
if( K_error(r) )
{ if( r > ~2 )
r = ~2;
goto End;
}
_0( disc->sata_ahci.trim_list, E_ssd_cache_Q_trim_S_list_max * sizeof( *disc->sata_ahci.trim_list ));
}
End:E_flow_I_unlock_r( &disc->sata_ahci.ssd_cache_lock, &r, r );
return r;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//TODO Dodać statystykę i na tej podstawie decydować, czy należy zapisać blok ‘dirty’, usunąć blok z ‘cache’?
_private
N
E_ssd_cache_I_sync_and_free( void
){ volatile N r;
r = 0;
for_n( disc_id, E_mem_Q_tab_R_n( E_disc_S ))
{ struct E_disc_Z *disc = E_mem_Q_tab_R( E_disc_S, disc_id );
if( disc->type != E_disc_Z_type_S_sata_ahci )
continue;
E_flow_I_lock( &disc->sata_ahci.ssd_cache_lock );
if( K_error(r) )
return r;
if( disc->sata_ahci.trim_list_n )
{ N32 slot_mask = 0;
r = E_sata_Q_sata_ahci_I_trim( disc_id
, disc->sata_ahci.trim_list
, E_ssd_cache_Q_trim_S_list_max * sizeof( *disc->sata_ahci.trim_list ) / disc->sata_ahci.logical_sector_size
, &slot_mask
);
if( K_error(r) )
{ if( r > ~2 )
r = ~2;
goto End;
}
disc->sata_ahci.trim_list_n = 0;
r = E_sata_Q_sata_ahci_I_wait_on_completion( disc, slot_mask );
if( K_error(r) )
{ if( r > ~2 )
r = ~2;
goto End;
}
_0( disc->sata_ahci.trim_list, E_ssd_cache_Q_trim_S_list_max * sizeof( *disc->sata_ahci.trim_list ));
}
N32 slot_mask = 0;
for_n( dirty_i, disc->sata_ahci.dirty_n )
{ N min = 0;
N max = disc->sata_ahci.ssd_cache_n - 1;
N cache_i = max / 2;
O{ N cache_start = disc->sata_ahci.ssd_cache[ cache_i ].pba;
N cache_end = disc->sata_ahci.ssd_cache[ cache_i ].pba + disc->sata_ahci.ssd_cache[ cache_i ].count;
if( disc->sata_ahci.dirty[ dirty_i ].pba >= cache_start
&& disc->sata_ahci.dirty[ dirty_i ].pba < cache_end
) // Początek sektora ‘dirty’ jest wewnątrz bloku ‘cache’.
break;
if( cache_start > disc->sata_ahci.dirty[ dirty_i ].pba )
{ if( cache_i == min )
break;
max = cache_i - 1;
cache_i = max - ( cache_i - min ) / 2;
}else
{ if( cache_i == max )
break;
min = cache_i + 1;
cache_i = min + ( max - cache_i ) / 2;
}
}
r = E_sata_Q_sata_ahci_I_write( disc_id
, disc->sata_ahci.logical_sector_shift + disc->sata_ahci.dirty[ dirty_i ].pba * disc->sata_ahci.physical_sector_size / disc->sata_ahci.logical_sector_size
, disc->sata_ahci.dirty[ dirty_i ].count * disc->sata_ahci.physical_sector_size / disc->sata_ahci.logical_sector_size
, disc->sata_ahci.ssd_cache[ cache_i ].data + ( disc->sata_ahci.dirty[ dirty_i ].pba - disc->sata_ahci.ssd_cache[ cache_i ].pba ) * disc->sata_ahci.physical_sector_size
, &slot_mask
);
if( K_error(r) )
{ if( r > ~2 )
r = ~2;
goto End;
}
}
r = E_sata_Q_sata_ahci_I_wait_on_completion( disc, slot_mask );
if( K_error(r) )
{ if( r > ~2 )
r = ~2;
goto End;
}
N r_ = (N)E_mem_Q_blk_I_remove( &disc->sata_ahci.dirty, 0, disc->sata_ahci.dirty_n );
if( K_error( r_ )
|| !r_
)
{ if( r_ == ~4 )
Gk(E_mem_Q_blk_I_remove( &disc->sata_ahci.dirty, 0, disc->sata_ahci.dirty_n ));
r = (S)r_ < ~2 ? r_ : ~2;
goto End;
}
disc->sata_ahci.dirty_n = 0;
for_n( cache_i, disc->sata_ahci.ssd_cache_n )
{ r = W( disc->sata_ahci.ssd_cache[ cache_i ].data );
if( K_error(r) )
{ if( r > ~2 )
r = ~2;
goto End;
}
}
r_ = (N)E_mem_Q_blk_I_remove( &disc->sata_ahci.ssd_cache, 0, disc->sata_ahci.ssd_cache_n );
if( K_error( r_ )
|| !r_
)
{ if( r_ == ~4 )
Gk(E_mem_Q_blk_I_remove( &disc->sata_ahci.ssd_cache, 0, disc->sata_ahci.ssd_cache_n ));
r = (S)r_ < ~2 ? r_ : ~2;
goto End;
}
disc->sata_ahci.ssd_cache_n = 0;
End: E_flow_I_unlock_r( &disc->sata_ahci.ssd_cache_lock, &r, r );
}
return r;
}
/******************************************************************************/