diff options
| -rw-r--r-- | Documentation/ide/ide.txt | 26 | ||||
| -rw-r--r-- | drivers/ide/ide.c | 79 |
2 files changed, 88 insertions, 17 deletions
diff --git a/Documentation/ide/ide.txt b/Documentation/ide/ide.txt index 601e79ecef0..5bff93c89a2 100644 --- a/Documentation/ide/ide.txt +++ b/Documentation/ide/ide.txt @@ -99,10 +99,10 @@ with hd.c but not with ide.c), then an command line option may be specified for each drive for which you'd like the drive to skip the hardware probe/identification sequence. For example: - hdb=noprobe + ide_core.noprobe=0.1 or hdc=768,16,32 - hdc=noprobe + ide_core.noprobe=1.0 Note that when only one IDE device is attached to an interface, it should be jumpered as "single" or "master", *not* "slave". Many folks have had @@ -174,9 +174,7 @@ to /etc/modprobe.conf. When ide.c is used as a module, you can pass command line parameters to the driver using the "options=" keyword to insmod, while replacing any ',' with -';'. For example: - - insmod ide.o options="hda=nodma hdb=nodma" +';'. ================================================================================ @@ -186,18 +184,10 @@ Summary of ide driver parameters for kernel command line "hdx=" is recognized for all "x" from "a" to "u", such as "hdc". - "hdx=noprobe" : drive may be present, but do not probe for it - - "hdx=none" : drive is NOT present, ignore cmos and do not probe - - "hdx=nowerr" : ignore the WRERR_STAT bit on this drive - "hdx=cdrom" : drive is present, and is a cdrom drive "hdx=cyl,head,sect" : disk drive is present, with specified geometry - "hdx=nodma" : disallow DMA - "ide=doubler" : probe/support IDE doublers on Amiga There may be more options than shown -- use the source, Luke! @@ -230,6 +220,16 @@ a case please report it as a bug instead) use "ignore_cable" kernel parameter: * "ignore_cable=[interface_number]" module parameter (for ide_core module) if IDE is compiled as module +Other kernel parameters for ide_core are: + +* "nodma=[interface_number.device_number]" to disallow DMA for a device + +* "noflush=[interface_number.device_number]" to disable flush requests + +* "noprobe=[interface_number.device_number]" to skip probing + +* "nowerr=[interface_number.device_number]" to ignore the WRERR_STAT bit + ================================================================================ Some Terminology diff --git a/drivers/ide/ide.c b/drivers/ide/ide.c index 71fa3797921..d8f40ee74ce 100644 --- a/drivers/ide/ide.c +++ b/drivers/ide/ide.c @@ -915,10 +915,10 @@ static int __init ide_setup(char *s) case -1: /* "none" */ case -2: /* "noprobe" */ drive->noprobe = 1; - goto done; + goto obsolete_option; case -3: /* "nowerr" */ drive->bad_wstat = BAD_R_STAT; - goto done; + goto obsolete_option; case -4: /* "cdrom" */ drive->present = 1; drive->media = ide_cdrom; @@ -927,10 +927,10 @@ static int __init ide_setup(char *s) goto done; case -5: /* nodma */ drive->nodma = 1; - goto done; + goto obsolete_option; case -11: /* noflush */ drive->noflush = 1; - goto done; + goto obsolete_option; case -12: /* "remap" */ drive->remap_0_to_1 = 1; goto obsolete_option; @@ -1125,6 +1125,72 @@ EXPORT_SYMBOL_GPL(ide_pci_clk); module_param_named(pci_clock, ide_pci_clk, int, 0); MODULE_PARM_DESC(pci_clock, "PCI bus clock frequency (in MHz)"); +static int ide_set_dev_param_mask(const char *s, struct kernel_param *kp) +{ + int a, b, i, j = 1; + unsigned int *dev_param_mask = (unsigned int *)kp->arg; + + if (sscanf(s, "%d.%d:%d", &a, &b, &j) != 3 && + sscanf(s, "%d.%d", &a, &b) != 2) + return -EINVAL; + + i = a * MAX_DRIVES + b; + + if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1) + return -EINVAL; + + if (j) + *dev_param_mask |= (1 << i); + else + *dev_param_mask &= (1 << i); + + return 0; +} + +static unsigned int ide_nodma; + +module_param_call(nodma, ide_set_dev_param_mask, NULL, &ide_nodma, 0); +MODULE_PARM_DESC(nodma, "disallow DMA for a device"); + +static unsigned int ide_noflush; + +module_param_call(noflush, ide_set_dev_param_mask, NULL, &ide_noflush, 0); +MODULE_PARM_DESC(noflush, "disable flush requests for a device"); + +static unsigned int ide_noprobe; + +module_param_call(noprobe, ide_set_dev_param_mask, NULL, &ide_noprobe, 0); +MODULE_PARM_DESC(noprobe, "skip probing for a device"); + +static unsigned int ide_nowerr; + +module_param_call(nowerr, ide_set_dev_param_mask, NULL, &ide_nowerr, 0); +MODULE_PARM_DESC(nowerr, "ignore the WRERR_STAT bit for a device"); + +static void ide_dev_apply_params(ide_drive_t *drive) +{ + int i = drive->hwif->index * MAX_DRIVES + drive->select.b.unit; + + if (ide_nodma & (1 << i)) { + printk(KERN_INFO "ide: disallowing DMA for %s\n", drive->name); + drive->nodma = 1; + } + if (ide_noflush & (1 << i)) { + printk(KERN_INFO "ide: disabling flush requests for %s\n", + drive->name); + drive->noflush = 1; + } + if (ide_noprobe & (1 << i)) { + printk(KERN_INFO "ide: skipping probe for %s\n", drive->name); + drive->noprobe = 1; + } + if (ide_nowerr & (1 << i)) { + printk(KERN_INFO "ide: ignoring the WRERR_STAT bit for %s\n", + drive->name); + drive->bad_wstat = BAD_R_STAT; + } +} + static unsigned int ide_ignore_cable; static int ide_set_ignore_cable(const char *s, struct kernel_param *kp) @@ -1150,11 +1216,16 @@ MODULE_PARM_DESC(ignore_cable, "ignore cable detection"); void ide_port_apply_params(ide_hwif_t *hwif) { + int i; + if (ide_ignore_cable & (1 << hwif->index)) { printk(KERN_INFO "ide: ignoring cable detection for %s\n", hwif->name); hwif->cbl = ATA_CBL_PATA40_SHORT; } + + for (i = 0; i < MAX_DRIVES; i++) + ide_dev_apply_params(&hwif->drives[i]); } /* |