From: Jorrit Herder Date: Thu, 20 Oct 2005 20:26:02 +0000 (+0000) Subject: New MEM driver for recovery. X-Git-Tag: v3.1.2a~596 X-Git-Url: http://zhaoyanbai.com/repos/%22http:/www.isc.org/icons/zpipe.c?a=commitdiff_plain;h=381c24ce1724084b911bb22eec4fe71351a0dfca;p=minix.git New MEM driver for recovery. --- diff --git a/drivers/at_wini/at_wini.c b/drivers/at_wini/at_wini.c index 552eb3c6c..59421efb0 100644 --- a/drivers/at_wini/at_wini.c +++ b/drivers/at_wini/at_wini.c @@ -6,7 +6,7 @@ * at_winchester_task: main entry when system is brought up * * Changes: - * Aug 19, 2005 ata pci support, supports SATA (Ben Gras) + * Aug 19, 2005 ATA PCI support, supports SATA (Ben Gras) * Nov 18, 2004 moved AT disk driver to user-space (Jorrit N. Herder) * Aug 20, 2004 watchdogs replaced by sync alarms (Jorrit N. Herder) * Mar 23, 2000 added ATAPI CDROM support (Michael Temari) @@ -194,8 +194,8 @@ int w_next_drive = 0; /* Variables. */ -/* wini is indexed by controller first, then drive (0-3). - * controller 0 is always the 'compatability' ide controller, at +/* The struct wini is indexed by controller first, then drive (0-3). + * Controller 0 is always the 'compatability' ide controller, at * the fixed locations, whether present or not. */ PRIVATE struct wini { /* main drive struct, one entry per drive */ @@ -235,7 +235,8 @@ PRIVATE int w_controller; /* selected controller */ PRIVATE struct device *w_dv; /* device's base and size */ FORWARD _PROTOTYPE( void init_params, (void) ); -FORWARD _PROTOTYPE( void init_drive, (struct wini *, int, int, int, int, int, int)); +FORWARD _PROTOTYPE( void init_drive, (struct wini *, int, int, int, + int, int, int)); FORWARD _PROTOTYPE( void init_params_pci, (int) ); FORWARD _PROTOTYPE( int w_do_open, (struct driver *dp, message *m_ptr) ); FORWARD _PROTOTYPE( struct device *w_prepare, (int dev) ); diff --git a/drivers/libdriver/driver.c b/drivers/libdriver/driver.c index 50a2fcf7d..1eb91425d 100644 --- a/drivers/libdriver/driver.c +++ b/drivers/libdriver/driver.c @@ -87,23 +87,22 @@ struct driver *dp; /* Device dependent entry points. */ while (TRUE) { /* Wait for a request to read or write a disk block. */ - if(receive(ANY, &mess) != OK) continue; + if (receive(ANY, &mess) != OK) continue; device_caller = mess.m_source; proc_nr = mess.PROC_NR; /* Now carry out the work. */ switch(mess.m_type) { - case DEV_OPEN: r = (*dp->dr_open)(dp, &mess); break; + case DEV_OPEN: r = (*dp->dr_open)(dp, &mess); break; case DEV_CLOSE: r = (*dp->dr_close)(dp, &mess); break; case DEV_IOCTL: r = (*dp->dr_ioctl)(dp, &mess); break; case CANCEL: r = (*dp->dr_cancel)(dp, &mess);break; case DEV_SELECT: r = (*dp->dr_select)(dp, &mess);break; - case DEV_READ: - case DEV_WRITE: r = do_rdwt(dp, &mess); break; + case DEV_WRITE: r = do_rdwt(dp, &mess); break; case DEV_GATHER: - case DEV_SCATTER: r = do_vrdwt(dp, &mess); break; + case DEV_SCATTER: r = do_vrdwt(dp, &mess); break; case HARD_INT: /* leftover interrupt or expired timer. */ if(dp->dr_hw_int) { @@ -138,6 +137,7 @@ struct driver *dp; /* Device dependent entry points. */ } } + /*===========================================================================* * init_buffer * *===========================================================================*/ diff --git a/drivers/memory/memory.c b/drivers/memory/memory.c index 280b8c9ce..5581d6cd3 100644 --- a/drivers/memory/memory.c +++ b/drivers/memory/memory.c @@ -205,12 +205,8 @@ PRIVATE int m_do_open(dp, m_ptr) struct driver *dp; message *m_ptr; { -/* Check device number on open. (This used to give I/O privileges to a - * process opening /dev/mem or /dev/kmem. This may be needed in case of - * memory mapped I/O. With system calls to do I/O this is no longer needed.) - */ +/* Check device number on open. */ if (m_prepare(m_ptr->DEVICE) == NIL_DEV) return(ENXIO); - return(OK); } @@ -220,6 +216,9 @@ message *m_ptr; PRIVATE void m_init() { /* Initialize this task. All minor devices are initialized one by one. */ + phys_bytes ramdev_size; + phys_bytes ramdev_base; + message m; int i, s; if (OK != (s=sys_getkinfo(&kinfo))) { @@ -244,6 +243,22 @@ PRIVATE void m_init() } } + /* See if there are already RAM disk details at the Data Store server. */ + m.DS_KEY = MEMORY_MAJOR; + if (OK == (s = _taskcall(DS_PROC_NR, DS_RETRIEVE, &m))) { + ramdev_size = m.DS_VAL_L1; + ramdev_base = m.DS_VAL_L2; + printf("MEM retrieved size %u and base %u from DS, status %d\n", + ramdev_size, ramdev_base, s); + if (OK != (s=sys_segctl(&m_seg[RAM_DEV], (u16_t *) &s, + (vir_bytes *) &s, ramdev_base, ramdev_size))) { + panic("MEM","Couldn't install remote segment.",s); + } + m_geom[RAM_DEV].dv_base = cvul64(ramdev_base); + m_geom[RAM_DEV].dv_size = cvul64(ramdev_size); + printf("MEM stored retrieved details as new RAM disk\n"); + } + /* Initialize /dev/zero. Simply write zeros into the buffer. */ for (i=0; iDEVICE)) == NIL_DEV) return(ENXIO); switch (m_ptr->REQUEST) { case MIOCRAMSIZE: { /* FS wants to create a new RAM disk with the given size. */ phys_bytes ramdev_size; phys_bytes ramdev_base; + message m; int s; - if (m_ptr->PROC_NR != FS_PROC_NR) { - report("MEM", "warning, MIOCRAMSIZE called by", m_ptr->PROC_NR); - return(EPERM); - } + /* Only FS can create RAM disk, and only on RAM disk device. */ + if (m_ptr->PROC_NR != FS_PROC_NR) return(EPERM); + if (m_ptr->DEVICE != RAM_DEV) return(EINVAL); + if ((dv = m_prepare(m_ptr->DEVICE)) == NIL_DEV) return(ENXIO); /* Try to allocate a piece of memory for the RAM disk. */ ramdev_size = m_ptr->POSITION; @@ -303,13 +318,26 @@ message *m_ptr; /* pointer to control message */ report("MEM", "warning, allocmem failed", errno); return(ENOMEM); } - dv->dv_base = cvul64(ramdev_base); - dv->dv_size = cvul64(ramdev_size); - if (OK != (s=sys_segctl(&m_seg[RAM_DEV], (u16_t *) &s, (vir_bytes *) &s, - ramdev_base, ramdev_size))) { + /* Store the values we got in the data store so we can retrieve + * them later on, in the unfortunate event of a crash. + */ + m.DS_KEY = MEMORY_MAJOR; + m.DS_VAL_L1 = ramdev_size; + m.DS_VAL_L2 = ramdev_base; + if (OK != (s = _taskcall(DS_PROC_NR, DS_PUBLISH, &m))) { + panic("MEM","Couldn't store RAM disk details at DS.",s); + } + printf("MEM stored size %u and base %u at DS, status %d\n", + ramdev_size, ramdev_base, s); + + if (OK != (s=sys_segctl(&m_seg[RAM_DEV], (u16_t *) &s, + (vir_bytes *) &s, ramdev_base, ramdev_size))) { panic("MEM","Couldn't install remote segment.",s); } + + dv->dv_base = cvul64(ramdev_base); + dv->dv_size = cvul64(ramdev_size); break; } case MIOCMAP: @@ -329,7 +357,6 @@ message *m_ptr; /* pointer to control message */ return r; r= sys_vm_map(m_ptr->PROC_NR, do_map, (phys_bytes)mapreq.base, mapreq.size, mapreq.offset); - printf("m_ioctl MIOC(UN)MAP: result %d\n", r); return r; }