xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

[SCSI] scsi_transport_sas: add unindexed ports

Browse Source 
Some SAS HBAs don't want to go to the trouble of tracking port numbers,
so they'd simply like to say "add this port and give it a number".
This is especially beneficial from the hotplug point of view, since
tracking ports and the available number space can be a real pain.

The current implementation uses an incrementing number per expander to
add the port on.  However, since there can never be more ports than
there are phys, a later implementation will try to be more intelligent
about this.

Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
James Bottomley
2006-07-02 11:10:18 -05:00
committed by James Bottomley
parent 24f6d2fd31
commit c9fefeb264
2 changed files with 38 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
include/scsi/scsi_transport_sas.h
View File

@@ -106,6 +106,7 @@ struct sas_end_device {
struct sas_expander_device {
int level;
int next_port_id;
#define SAS_EXPANDER_VENDOR_ID_LEN 8
char vendor_id[SAS_EXPANDER_VENDOR_ID_LEN+1];
@@ -127,7 +128,7 @@ struct sas_expander_device {
struct sas_port {
struct device dev;
u8 port_identifier;
int port_identifier;
int num_phys;
/* the other end of the link */
@@ -168,6 +169,7 @@ extern void sas_rphy_delete(struct sas_rphy *);
extern int scsi_is_sas_rphy(const struct device *);
struct sas_port *sas_port_alloc(struct device *, int);
struct sas_port *sas_port_alloc_num(struct device *);
int sas_port_add(struct sas_port *);
void sas_port_free(struct sas_port *);
void sas_port_delete(struct sas_port *);