aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/scsi
diff options
context:
space:
mode:
authorSumant Patro <sumantp@lsil.com>2007-02-14 15:41:55 -0500
committerJames Bottomley <jejb@mulgrave.il.steeleye.com>2007-02-16 11:19:53 -0500
commitcf62a0a543fbab15286509d2e04e3dcf5549e966 (patch)
tree9ed2070713deb33db6557031923be7cfe3ef1e68 /drivers/scsi
parentaf37acfb63d8e924550e67b884dbd1c478e26c96 (diff)
[SCSI] megaraid_sas: add bios_param in scsi_host_template
Signed-off-by: Sumant Patro <sumant.patro@lsi.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers/scsi')
-rw-r--r--drivers/scsi/megaraid/megaraid_sas.c45
1 files changed, 45 insertions, 0 deletions
diff --git a/drivers/scsi/megaraid/megaraid_sas.c b/drivers/scsi/megaraid/megaraid_sas.c
index 6ff540140807..9c5e4da5a132 100644
--- a/drivers/scsi/megaraid/megaraid_sas.c
+++ b/drivers/scsi/megaraid/megaraid_sas.c
@@ -35,6 +35,7 @@
35#include <asm/uaccess.h> 35#include <asm/uaccess.h>
36#include <linux/fs.h> 36#include <linux/fs.h>
37#include <linux/compat.h> 37#include <linux/compat.h>
38#include <linux/blkdev.h>
38#include <linux/mutex.h> 39#include <linux/mutex.h>
39 40
40#include <scsi/scsi.h> 41#include <scsi/scsi.h>
@@ -1015,6 +1016,49 @@ static int megasas_reset_bus_host(struct scsi_cmnd *scmd)
1015} 1016}
1016 1017
1017/** 1018/**
1019 * megasas_bios_param - Returns disk geometry for a disk
1020 * @sdev: device handle
1021 * @bdev: block device
1022 * @capacity: drive capacity
1023 * @geom: geometry parameters
1024 */
1025static int
1026megasas_bios_param(struct scsi_device *sdev, struct block_device *bdev,
1027 sector_t capacity, int geom[])
1028{
1029 int heads;
1030 int sectors;
1031 sector_t cylinders;
1032 unsigned long tmp;
1033 /* Default heads (64) & sectors (32) */
1034 heads = 64;
1035 sectors = 32;
1036
1037 tmp = heads * sectors;
1038 cylinders = capacity;
1039
1040 sector_div(cylinders, tmp);
1041
1042 /*
1043 * Handle extended translation size for logical drives > 1Gb
1044 */
1045
1046 if (capacity >= 0x200000) {
1047 heads = 255;
1048 sectors = 63;
1049 tmp = heads*sectors;
1050 cylinders = capacity;
1051 sector_div(cylinders, tmp);
1052 }
1053
1054 geom[0] = heads;
1055 geom[1] = sectors;
1056 geom[2] = cylinders;
1057
1058 return 0;
1059}
1060
1061/**
1018 * megasas_service_aen - Processes an event notification 1062 * megasas_service_aen - Processes an event notification
1019 * @instance: Adapter soft state 1063 * @instance: Adapter soft state
1020 * @cmd: AEN command completed by the ISR 1064 * @cmd: AEN command completed by the ISR
@@ -1054,6 +1098,7 @@ static struct scsi_host_template megasas_template = {
1054 .eh_device_reset_handler = megasas_reset_device, 1098 .eh_device_reset_handler = megasas_reset_device,
1055 .eh_bus_reset_handler = megasas_reset_bus_host, 1099 .eh_bus_reset_handler = megasas_reset_bus_host,
1056 .eh_host_reset_handler = megasas_reset_bus_host, 1100 .eh_host_reset_handler = megasas_reset_bus_host,
1101 .bios_param = megasas_bios_param,
1057 .use_clustering = ENABLE_CLUSTERING, 1102 .use_clustering = ENABLE_CLUSTERING,
1058}; 1103};
1059 1104