[libata] fake geometry for partition tables / setups that need such

drivers/scsi/ata_piix.c

@@ -97,6 +97,7 @@ static Scsi_Host_Template piix_sht = {
 	.proc_name		= DRV_NAME,
 	.dma_boundary		= ATA_DMA_BOUNDARY,
 	.slave_configure	= ata_scsi_slave_config,
+	.bios_param		= ata_std_bios_param,
 };
 
 static struct ata_port_operations piix_pata_ops = {

drivers/scsi/libata-core.c

@@ -3279,6 +3279,29 @@ int pci_test_config_bits(struct pci_dev *pdev, struct pci_bits *bits)
 	return (tmp == bits->val) ? 1 : 0;
 }
 
+
+/**
+ *	ata_std_bios_param - generic bios head/sector/cylinder calculator
+ *	    used by sd. Most BIOSes nowadays expect a XXX/255/16  (CHS) 
+ *	    mapping. Some situations may arise where the disk is not 
+ *	    bootable if this is not used.
+ *
+ *	LOCKING:
+ *
+ *	RETURNS:
+ *
+ */
+int ata_std_bios_param(Disk * disk,	/* SCSI disk */
+		       kdev_t dev,	/* Device major, minor */
+		  int *ip /* Heads, sectors, cylinders in that order */ )
+{
+	ip[0] = 255;
+	ip[1] = 63;
+	ip[2] = disk->capacity / (ip[0] * ip[1]);
+
+	return 0;
+}
+
 /**
  *	ata_init -
  *
@@ -3304,6 +3327,7 @@ module_init(ata_init);
  */
 
 EXPORT_SYMBOL_GPL(pci_test_config_bits);
+EXPORT_SYMBOL_GPL(ata_std_bios_param);
 EXPORT_SYMBOL_GPL(ata_std_ports);
 EXPORT_SYMBOL_GPL(ata_device_add);
 EXPORT_SYMBOL_GPL(ata_qc_complete);

drivers/scsi/sata_promise.c

@@ -186,6 +186,7 @@ static Scsi_Host_Template pdc_sata_sht = {
 	.proc_name		= DRV_NAME,
 	.dma_boundary		= ATA_DMA_BOUNDARY,
 	.slave_configure	= ata_scsi_slave_config,
+	.bios_param		= ata_std_bios_param,
 };
 
 static struct ata_port_operations pdc_sata_ops = {

drivers/scsi/sata_sil.c

@@ -87,6 +87,7 @@ static Scsi_Host_Template sil_sht = {
 	.proc_name		= DRV_NAME,
 	.dma_boundary		= ATA_DMA_BOUNDARY,
 	.slave_configure	= ata_scsi_slave_config,
+	.bios_param		= ata_std_bios_param,
 };
 
 static struct ata_port_operations sil_ops = {

drivers/scsi/sata_svw.c

@@ -219,6 +219,7 @@ static Scsi_Host_Template k2_sata_sht = {
 #ifdef CONFIG_ALL_PPC
 	.proc_info		= k2_sata_proc_info
 #endif
+	.bios_param		= ata_std_bios_param,
 };
 
 

drivers/scsi/sata_via.c

@@ -78,6 +78,7 @@ static Scsi_Host_Template svia_sht = {
 	.proc_name		= DRV_NAME,
 	.dma_boundary		= ATA_DMA_BOUNDARY,
 	.slave_configure	= ata_scsi_slave_config,
+	.bios_param		= ata_std_bios_param,
 };
 
 static struct ata_port_operations svia_sata_ops = {

include/linux/libata.h

@@ -427,6 +427,7 @@ extern void ata_bmdma_start_pio (struct ata_queued_cmd *qc);
 extern int pci_test_config_bits(struct pci_dev *pdev, struct pci_bits *bits);
 extern void ata_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat, unsigned int done_late);
 extern void ata_eng_timeout(struct ata_port *ap);
+extern int ata_std_bios_param(Disk * disk, kdev_t dev, int *ip);
 
 
 static inline unsigned long msecs_to_jiffies(unsigned long msecs)