![Joe Perches](/assets/img/avatar_default.png)
Signed-off-by: Joe Perches <joe@perches.com> Acked-by: Andrew Vasquez <andrew.vasquez@qlogic.com> Acked-by: James Smart <james.smart@emulex.com> Acked-by: Darrick J. Wong <djwong@us.ibm.com> Acked-by: David Somayajulu <david.somayajulu@qlogic.com> Acked-by: Mark Salyzyn <mark_salyzyn@adaptec.com> Signed-off-by: Adrian Bunk <bunk@kernel.org>
1795 lines
48 KiB
C
1795 lines
48 KiB
C
/*
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* Copyright (C) 2005-2006 Dell Inc.
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* Released under GPL v2.
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*
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* Serial Attached SCSI (SAS) transport class.
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*
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* The SAS transport class contains common code to deal with SAS HBAs,
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* an aproximated representation of SAS topologies in the driver model,
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* and various sysfs attributes to expose these topologies and management
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* interfaces to userspace.
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*
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* In addition to the basic SCSI core objects this transport class
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* introduces two additional intermediate objects: The SAS PHY
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* as represented by struct sas_phy defines an "outgoing" PHY on
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* a SAS HBA or Expander, and the SAS remote PHY represented by
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* struct sas_rphy defines an "incoming" PHY on a SAS Expander or
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* end device. Note that this is purely a software concept, the
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* underlying hardware for a PHY and a remote PHY is the exactly
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* the same.
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*
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* There is no concept of a SAS port in this code, users can see
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* what PHYs form a wide port based on the port_identifier attribute,
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* which is the same for all PHYs in a port.
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/jiffies.h>
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#include <linux/err.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/blkdev.h>
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#include <linux/bsg.h>
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#include <scsi/scsi.h>
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#include <scsi/scsi_device.h>
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#include <scsi/scsi_host.h>
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#include <scsi/scsi_transport.h>
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#include <scsi/scsi_transport_sas.h>
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#include "scsi_sas_internal.h"
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struct sas_host_attrs {
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struct list_head rphy_list;
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struct mutex lock;
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struct request_queue *q;
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u32 next_target_id;
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u32 next_expander_id;
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int next_port_id;
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};
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#define to_sas_host_attrs(host) ((struct sas_host_attrs *)(host)->shost_data)
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/*
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* Hack to allow attributes of the same name in different objects.
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*/
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#define SAS_CLASS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
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struct class_device_attribute class_device_attr_##_prefix##_##_name = \
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__ATTR(_name,_mode,_show,_store)
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/*
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* Pretty printing helpers
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*/
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#define sas_bitfield_name_match(title, table) \
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static ssize_t \
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get_sas_##title##_names(u32 table_key, char *buf) \
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{ \
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char *prefix = ""; \
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ssize_t len = 0; \
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int i; \
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\
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for (i = 0; i < ARRAY_SIZE(table); i++) { \
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if (table[i].value & table_key) { \
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len += sprintf(buf + len, "%s%s", \
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prefix, table[i].name); \
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prefix = ", "; \
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} \
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} \
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len += sprintf(buf + len, "\n"); \
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return len; \
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}
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#define sas_bitfield_name_set(title, table) \
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static ssize_t \
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set_sas_##title##_names(u32 *table_key, const char *buf) \
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{ \
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ssize_t len = 0; \
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int i; \
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\
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for (i = 0; i < ARRAY_SIZE(table); i++) { \
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len = strlen(table[i].name); \
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if (strncmp(buf, table[i].name, len) == 0 && \
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(buf[len] == '\n' || buf[len] == '\0')) { \
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*table_key = table[i].value; \
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return 0; \
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} \
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} \
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return -EINVAL; \
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}
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#define sas_bitfield_name_search(title, table) \
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static ssize_t \
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get_sas_##title##_names(u32 table_key, char *buf) \
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{ \
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ssize_t len = 0; \
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int i; \
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\
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for (i = 0; i < ARRAY_SIZE(table); i++) { \
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if (table[i].value == table_key) { \
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len += sprintf(buf + len, "%s", \
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table[i].name); \
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break; \
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} \
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} \
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len += sprintf(buf + len, "\n"); \
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return len; \
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}
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static struct {
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u32 value;
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char *name;
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} sas_device_type_names[] = {
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{ SAS_PHY_UNUSED, "unused" },
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{ SAS_END_DEVICE, "end device" },
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{ SAS_EDGE_EXPANDER_DEVICE, "edge expander" },
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{ SAS_FANOUT_EXPANDER_DEVICE, "fanout expander" },
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};
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sas_bitfield_name_search(device_type, sas_device_type_names)
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static struct {
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u32 value;
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char *name;
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} sas_protocol_names[] = {
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{ SAS_PROTOCOL_SATA, "sata" },
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{ SAS_PROTOCOL_SMP, "smp" },
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{ SAS_PROTOCOL_STP, "stp" },
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{ SAS_PROTOCOL_SSP, "ssp" },
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};
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sas_bitfield_name_match(protocol, sas_protocol_names)
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static struct {
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u32 value;
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char *name;
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} sas_linkspeed_names[] = {
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{ SAS_LINK_RATE_UNKNOWN, "Unknown" },
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{ SAS_PHY_DISABLED, "Phy disabled" },
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{ SAS_LINK_RATE_FAILED, "Link Rate failed" },
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{ SAS_SATA_SPINUP_HOLD, "Spin-up hold" },
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{ SAS_LINK_RATE_1_5_GBPS, "1.5 Gbit" },
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{ SAS_LINK_RATE_3_0_GBPS, "3.0 Gbit" },
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{ SAS_LINK_RATE_6_0_GBPS, "6.0 Gbit" },
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};
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sas_bitfield_name_search(linkspeed, sas_linkspeed_names)
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sas_bitfield_name_set(linkspeed, sas_linkspeed_names)
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static void sas_smp_request(struct request_queue *q, struct Scsi_Host *shost,
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struct sas_rphy *rphy)
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{
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struct request *req;
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int ret;
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int (*handler)(struct Scsi_Host *, struct sas_rphy *, struct request *);
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while (!blk_queue_plugged(q)) {
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req = elv_next_request(q);
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if (!req)
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break;
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blkdev_dequeue_request(req);
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spin_unlock_irq(q->queue_lock);
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handler = to_sas_internal(shost->transportt)->f->smp_handler;
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ret = handler(shost, rphy, req);
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req->errors = ret;
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spin_lock_irq(q->queue_lock);
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req->end_io(req, ret);
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}
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}
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static void sas_host_smp_request(struct request_queue *q)
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{
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sas_smp_request(q, (struct Scsi_Host *)q->queuedata, NULL);
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}
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static void sas_non_host_smp_request(struct request_queue *q)
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{
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struct sas_rphy *rphy = q->queuedata;
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sas_smp_request(q, rphy_to_shost(rphy), rphy);
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}
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static int sas_bsg_initialize(struct Scsi_Host *shost, struct sas_rphy *rphy)
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{
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struct request_queue *q;
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int error;
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struct device *dev;
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char namebuf[BUS_ID_SIZE];
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const char *name;
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if (!to_sas_internal(shost->transportt)->f->smp_handler) {
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printk("%s can't handle SMP requests\n", shost->hostt->name);
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return 0;
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}
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if (rphy) {
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q = blk_init_queue(sas_non_host_smp_request, NULL);
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dev = &rphy->dev;
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name = dev->bus_id;
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} else {
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q = blk_init_queue(sas_host_smp_request, NULL);
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dev = &shost->shost_gendev;
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snprintf(namebuf, sizeof(namebuf),
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"sas_host%d", shost->host_no);
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name = namebuf;
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}
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if (!q)
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return -ENOMEM;
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error = bsg_register_queue(q, dev, name);
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if (error) {
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blk_cleanup_queue(q);
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return -ENOMEM;
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}
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if (rphy)
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rphy->q = q;
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else
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to_sas_host_attrs(shost)->q = q;
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if (rphy)
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q->queuedata = rphy;
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else
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q->queuedata = shost;
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set_bit(QUEUE_FLAG_BIDI, &q->queue_flags);
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return 0;
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}
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static void sas_bsg_remove(struct Scsi_Host *shost, struct sas_rphy *rphy)
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{
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struct request_queue *q;
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if (rphy)
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q = rphy->q;
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else
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q = to_sas_host_attrs(shost)->q;
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if (!q)
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return;
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bsg_unregister_queue(q);
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blk_cleanup_queue(q);
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}
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/*
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* SAS host attributes
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*/
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static int sas_host_setup(struct transport_container *tc, struct device *dev,
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struct class_device *cdev)
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{
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struct Scsi_Host *shost = dev_to_shost(dev);
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struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
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INIT_LIST_HEAD(&sas_host->rphy_list);
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mutex_init(&sas_host->lock);
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sas_host->next_target_id = 0;
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sas_host->next_expander_id = 0;
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sas_host->next_port_id = 0;
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if (sas_bsg_initialize(shost, NULL))
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dev_printk(KERN_ERR, dev, "fail to a bsg device %d\n",
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shost->host_no);
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return 0;
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}
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static int sas_host_remove(struct transport_container *tc, struct device *dev,
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struct class_device *cdev)
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{
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struct Scsi_Host *shost = dev_to_shost(dev);
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sas_bsg_remove(shost, NULL);
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return 0;
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}
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static DECLARE_TRANSPORT_CLASS(sas_host_class,
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"sas_host", sas_host_setup, sas_host_remove, NULL);
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static int sas_host_match(struct attribute_container *cont,
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struct device *dev)
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{
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struct Scsi_Host *shost;
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struct sas_internal *i;
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if (!scsi_is_host_device(dev))
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return 0;
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shost = dev_to_shost(dev);
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if (!shost->transportt)
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return 0;
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if (shost->transportt->host_attrs.ac.class !=
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&sas_host_class.class)
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return 0;
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i = to_sas_internal(shost->transportt);
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return &i->t.host_attrs.ac == cont;
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}
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static int do_sas_phy_delete(struct device *dev, void *data)
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{
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int pass = (int)(unsigned long)data;
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if (pass == 0 && scsi_is_sas_port(dev))
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sas_port_delete(dev_to_sas_port(dev));
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else if (pass == 1 && scsi_is_sas_phy(dev))
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sas_phy_delete(dev_to_phy(dev));
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return 0;
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}
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/**
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* sas_remove_children - tear down a devices SAS data structures
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* @dev: device belonging to the sas object
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*
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* Removes all SAS PHYs and remote PHYs for a given object
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*/
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void sas_remove_children(struct device *dev)
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{
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device_for_each_child(dev, (void *)0, do_sas_phy_delete);
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device_for_each_child(dev, (void *)1, do_sas_phy_delete);
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}
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EXPORT_SYMBOL(sas_remove_children);
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/**
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* sas_remove_host - tear down a Scsi_Host's SAS data structures
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* @shost: Scsi Host that is torn down
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*
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* Removes all SAS PHYs and remote PHYs for a given Scsi_Host.
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* Must be called just before scsi_remove_host for SAS HBAs.
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*/
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void sas_remove_host(struct Scsi_Host *shost)
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{
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sas_remove_children(&shost->shost_gendev);
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}
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EXPORT_SYMBOL(sas_remove_host);
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/*
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* SAS Phy attributes
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*/
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#define sas_phy_show_simple(field, name, format_string, cast) \
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static ssize_t \
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show_sas_phy_##name(struct class_device *cdev, char *buf) \
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{ \
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struct sas_phy *phy = transport_class_to_phy(cdev); \
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\
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return snprintf(buf, 20, format_string, cast phy->field); \
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}
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#define sas_phy_simple_attr(field, name, format_string, type) \
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sas_phy_show_simple(field, name, format_string, (type)) \
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static CLASS_DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
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#define sas_phy_show_protocol(field, name) \
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static ssize_t \
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show_sas_phy_##name(struct class_device *cdev, char *buf) \
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{ \
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struct sas_phy *phy = transport_class_to_phy(cdev); \
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\
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if (!phy->field) \
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return snprintf(buf, 20, "none\n"); \
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return get_sas_protocol_names(phy->field, buf); \
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}
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#define sas_phy_protocol_attr(field, name) \
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sas_phy_show_protocol(field, name) \
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static CLASS_DEVICE_ATTR(name, S_IRUGO, show_sas_phy_##name, NULL)
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#define sas_phy_show_linkspeed(field) \
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static ssize_t \
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show_sas_phy_##field(struct class_device *cdev, char *buf) \
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{ \
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struct sas_phy *phy = transport_class_to_phy(cdev); \
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\
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return get_sas_linkspeed_names(phy->field, buf); \
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}
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/* Fudge to tell if we're minimum or maximum */
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#define sas_phy_store_linkspeed(field) \
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static ssize_t \
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store_sas_phy_##field(struct class_device *cdev, const char *buf, \
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size_t count) \
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{ \
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struct sas_phy *phy = transport_class_to_phy(cdev); \
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struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); \
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struct sas_internal *i = to_sas_internal(shost->transportt); \
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u32 value; \
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struct sas_phy_linkrates rates = {0}; \
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int error; \
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\
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error = set_sas_linkspeed_names(&value, buf); \
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if (error) \
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return error; \
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rates.field = value; \
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error = i->f->set_phy_speed(phy, &rates); \
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\
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return error ? error : count; \
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}
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#define sas_phy_linkspeed_rw_attr(field) \
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sas_phy_show_linkspeed(field) \
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sas_phy_store_linkspeed(field) \
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static CLASS_DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, \
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store_sas_phy_##field)
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#define sas_phy_linkspeed_attr(field) \
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sas_phy_show_linkspeed(field) \
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static CLASS_DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
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#define sas_phy_show_linkerror(field) \
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static ssize_t \
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show_sas_phy_##field(struct class_device *cdev, char *buf) \
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{ \
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struct sas_phy *phy = transport_class_to_phy(cdev); \
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struct Scsi_Host *shost = dev_to_shost(phy->dev.parent); \
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struct sas_internal *i = to_sas_internal(shost->transportt); \
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int error; \
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\
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error = i->f->get_linkerrors ? i->f->get_linkerrors(phy) : 0; \
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if (error) \
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return error; \
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return snprintf(buf, 20, "%u\n", phy->field); \
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}
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#define sas_phy_linkerror_attr(field) \
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sas_phy_show_linkerror(field) \
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static CLASS_DEVICE_ATTR(field, S_IRUGO, show_sas_phy_##field, NULL)
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|
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static ssize_t
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show_sas_device_type(struct class_device *cdev, char *buf)
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{
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struct sas_phy *phy = transport_class_to_phy(cdev);
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if (!phy->identify.device_type)
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return snprintf(buf, 20, "none\n");
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return get_sas_device_type_names(phy->identify.device_type, buf);
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}
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static CLASS_DEVICE_ATTR(device_type, S_IRUGO, show_sas_device_type, NULL);
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static ssize_t do_sas_phy_enable(struct class_device *cdev,
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size_t count, int enable)
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{
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struct sas_phy *phy = transport_class_to_phy(cdev);
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struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
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struct sas_internal *i = to_sas_internal(shost->transportt);
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int error;
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error = i->f->phy_enable(phy, enable);
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if (error)
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return error;
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phy->enabled = enable;
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return count;
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};
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static ssize_t store_sas_phy_enable(struct class_device *cdev,
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const char *buf, size_t count)
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{
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if (count < 1)
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return -EINVAL;
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switch (buf[0]) {
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case '0':
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do_sas_phy_enable(cdev, count, 0);
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break;
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case '1':
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|
do_sas_phy_enable(cdev, count, 1);
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
static ssize_t show_sas_phy_enable(struct class_device *cdev, char *buf)
|
|
{
|
|
struct sas_phy *phy = transport_class_to_phy(cdev);
|
|
|
|
return snprintf(buf, 20, "%d", phy->enabled);
|
|
}
|
|
|
|
static CLASS_DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, show_sas_phy_enable,
|
|
store_sas_phy_enable);
|
|
|
|
static ssize_t do_sas_phy_reset(struct class_device *cdev,
|
|
size_t count, int hard_reset)
|
|
{
|
|
struct sas_phy *phy = transport_class_to_phy(cdev);
|
|
struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
|
|
struct sas_internal *i = to_sas_internal(shost->transportt);
|
|
int error;
|
|
|
|
error = i->f->phy_reset(phy, hard_reset);
|
|
if (error)
|
|
return error;
|
|
return count;
|
|
};
|
|
|
|
static ssize_t store_sas_link_reset(struct class_device *cdev,
|
|
const char *buf, size_t count)
|
|
{
|
|
return do_sas_phy_reset(cdev, count, 0);
|
|
}
|
|
static CLASS_DEVICE_ATTR(link_reset, S_IWUSR, NULL, store_sas_link_reset);
|
|
|
|
static ssize_t store_sas_hard_reset(struct class_device *cdev,
|
|
const char *buf, size_t count)
|
|
{
|
|
return do_sas_phy_reset(cdev, count, 1);
|
|
}
|
|
static CLASS_DEVICE_ATTR(hard_reset, S_IWUSR, NULL, store_sas_hard_reset);
|
|
|
|
sas_phy_protocol_attr(identify.initiator_port_protocols,
|
|
initiator_port_protocols);
|
|
sas_phy_protocol_attr(identify.target_port_protocols,
|
|
target_port_protocols);
|
|
sas_phy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
|
|
unsigned long long);
|
|
sas_phy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
|
|
//sas_phy_simple_attr(port_identifier, port_identifier, "%d\n", int);
|
|
sas_phy_linkspeed_attr(negotiated_linkrate);
|
|
sas_phy_linkspeed_attr(minimum_linkrate_hw);
|
|
sas_phy_linkspeed_rw_attr(minimum_linkrate);
|
|
sas_phy_linkspeed_attr(maximum_linkrate_hw);
|
|
sas_phy_linkspeed_rw_attr(maximum_linkrate);
|
|
sas_phy_linkerror_attr(invalid_dword_count);
|
|
sas_phy_linkerror_attr(running_disparity_error_count);
|
|
sas_phy_linkerror_attr(loss_of_dword_sync_count);
|
|
sas_phy_linkerror_attr(phy_reset_problem_count);
|
|
|
|
|
|
static DECLARE_TRANSPORT_CLASS(sas_phy_class,
|
|
"sas_phy", NULL, NULL, NULL);
|
|
|
|
static int sas_phy_match(struct attribute_container *cont, struct device *dev)
|
|
{
|
|
struct Scsi_Host *shost;
|
|
struct sas_internal *i;
|
|
|
|
if (!scsi_is_sas_phy(dev))
|
|
return 0;
|
|
shost = dev_to_shost(dev->parent);
|
|
|
|
if (!shost->transportt)
|
|
return 0;
|
|
if (shost->transportt->host_attrs.ac.class !=
|
|
&sas_host_class.class)
|
|
return 0;
|
|
|
|
i = to_sas_internal(shost->transportt);
|
|
return &i->phy_attr_cont.ac == cont;
|
|
}
|
|
|
|
static void sas_phy_release(struct device *dev)
|
|
{
|
|
struct sas_phy *phy = dev_to_phy(dev);
|
|
|
|
put_device(dev->parent);
|
|
kfree(phy);
|
|
}
|
|
|
|
/**
|
|
* sas_phy_alloc - allocates and initialize a SAS PHY structure
|
|
* @parent: Parent device
|
|
* @number: Phy index
|
|
*
|
|
* Allocates an SAS PHY structure. It will be added in the device tree
|
|
* below the device specified by @parent, which has to be either a Scsi_Host
|
|
* or sas_rphy.
|
|
*
|
|
* Returns:
|
|
* SAS PHY allocated or %NULL if the allocation failed.
|
|
*/
|
|
struct sas_phy *sas_phy_alloc(struct device *parent, int number)
|
|
{
|
|
struct Scsi_Host *shost = dev_to_shost(parent);
|
|
struct sas_phy *phy;
|
|
|
|
phy = kzalloc(sizeof(*phy), GFP_KERNEL);
|
|
if (!phy)
|
|
return NULL;
|
|
|
|
phy->number = number;
|
|
phy->enabled = 1;
|
|
|
|
device_initialize(&phy->dev);
|
|
phy->dev.parent = get_device(parent);
|
|
phy->dev.release = sas_phy_release;
|
|
INIT_LIST_HEAD(&phy->port_siblings);
|
|
if (scsi_is_sas_expander_device(parent)) {
|
|
struct sas_rphy *rphy = dev_to_rphy(parent);
|
|
sprintf(phy->dev.bus_id, "phy-%d:%d:%d", shost->host_no,
|
|
rphy->scsi_target_id, number);
|
|
} else
|
|
sprintf(phy->dev.bus_id, "phy-%d:%d", shost->host_no, number);
|
|
|
|
transport_setup_device(&phy->dev);
|
|
|
|
return phy;
|
|
}
|
|
EXPORT_SYMBOL(sas_phy_alloc);
|
|
|
|
/**
|
|
* sas_phy_add - add a SAS PHY to the device hierarchy
|
|
* @phy: The PHY to be added
|
|
*
|
|
* Publishes a SAS PHY to the rest of the system.
|
|
*/
|
|
int sas_phy_add(struct sas_phy *phy)
|
|
{
|
|
int error;
|
|
|
|
error = device_add(&phy->dev);
|
|
if (!error) {
|
|
transport_add_device(&phy->dev);
|
|
transport_configure_device(&phy->dev);
|
|
}
|
|
|
|
return error;
|
|
}
|
|
EXPORT_SYMBOL(sas_phy_add);
|
|
|
|
/**
|
|
* sas_phy_free - free a SAS PHY
|
|
* @phy: SAS PHY to free
|
|
*
|
|
* Frees the specified SAS PHY.
|
|
*
|
|
* Note:
|
|
* This function must only be called on a PHY that has not
|
|
* sucessfully been added using sas_phy_add().
|
|
*/
|
|
void sas_phy_free(struct sas_phy *phy)
|
|
{
|
|
transport_destroy_device(&phy->dev);
|
|
put_device(&phy->dev);
|
|
}
|
|
EXPORT_SYMBOL(sas_phy_free);
|
|
|
|
/**
|
|
* sas_phy_delete - remove SAS PHY
|
|
* @phy: SAS PHY to remove
|
|
*
|
|
* Removes the specified SAS PHY. If the SAS PHY has an
|
|
* associated remote PHY it is removed before.
|
|
*/
|
|
void
|
|
sas_phy_delete(struct sas_phy *phy)
|
|
{
|
|
struct device *dev = &phy->dev;
|
|
|
|
/* this happens if the phy is still part of a port when deleted */
|
|
BUG_ON(!list_empty(&phy->port_siblings));
|
|
|
|
transport_remove_device(dev);
|
|
device_del(dev);
|
|
transport_destroy_device(dev);
|
|
put_device(dev);
|
|
}
|
|
EXPORT_SYMBOL(sas_phy_delete);
|
|
|
|
/**
|
|
* scsi_is_sas_phy - check if a struct device represents a SAS PHY
|
|
* @dev: device to check
|
|
*
|
|
* Returns:
|
|
* %1 if the device represents a SAS PHY, %0 else
|
|
*/
|
|
int scsi_is_sas_phy(const struct device *dev)
|
|
{
|
|
return dev->release == sas_phy_release;
|
|
}
|
|
EXPORT_SYMBOL(scsi_is_sas_phy);
|
|
|
|
/*
|
|
* SAS Port attributes
|
|
*/
|
|
#define sas_port_show_simple(field, name, format_string, cast) \
|
|
static ssize_t \
|
|
show_sas_port_##name(struct class_device *cdev, char *buf) \
|
|
{ \
|
|
struct sas_port *port = transport_class_to_sas_port(cdev); \
|
|
\
|
|
return snprintf(buf, 20, format_string, cast port->field); \
|
|
}
|
|
|
|
#define sas_port_simple_attr(field, name, format_string, type) \
|
|
sas_port_show_simple(field, name, format_string, (type)) \
|
|
static CLASS_DEVICE_ATTR(name, S_IRUGO, show_sas_port_##name, NULL)
|
|
|
|
sas_port_simple_attr(num_phys, num_phys, "%d\n", int);
|
|
|
|
static DECLARE_TRANSPORT_CLASS(sas_port_class,
|
|
"sas_port", NULL, NULL, NULL);
|
|
|
|
static int sas_port_match(struct attribute_container *cont, struct device *dev)
|
|
{
|
|
struct Scsi_Host *shost;
|
|
struct sas_internal *i;
|
|
|
|
if (!scsi_is_sas_port(dev))
|
|
return 0;
|
|
shost = dev_to_shost(dev->parent);
|
|
|
|
if (!shost->transportt)
|
|
return 0;
|
|
if (shost->transportt->host_attrs.ac.class !=
|
|
&sas_host_class.class)
|
|
return 0;
|
|
|
|
i = to_sas_internal(shost->transportt);
|
|
return &i->port_attr_cont.ac == cont;
|
|
}
|
|
|
|
|
|
static void sas_port_release(struct device *dev)
|
|
{
|
|
struct sas_port *port = dev_to_sas_port(dev);
|
|
|
|
BUG_ON(!list_empty(&port->phy_list));
|
|
|
|
put_device(dev->parent);
|
|
kfree(port);
|
|
}
|
|
|
|
static void sas_port_create_link(struct sas_port *port,
|
|
struct sas_phy *phy)
|
|
{
|
|
int res;
|
|
|
|
res = sysfs_create_link(&port->dev.kobj, &phy->dev.kobj,
|
|
phy->dev.bus_id);
|
|
if (res)
|
|
goto err;
|
|
res = sysfs_create_link(&phy->dev.kobj, &port->dev.kobj, "port");
|
|
if (res)
|
|
goto err;
|
|
return;
|
|
err:
|
|
printk(KERN_ERR "%s: Cannot create port links, err=%d\n",
|
|
__FUNCTION__, res);
|
|
}
|
|
|
|
static void sas_port_delete_link(struct sas_port *port,
|
|
struct sas_phy *phy)
|
|
{
|
|
sysfs_remove_link(&port->dev.kobj, phy->dev.bus_id);
|
|
sysfs_remove_link(&phy->dev.kobj, "port");
|
|
}
|
|
|
|
/** sas_port_alloc - allocate and initialize a SAS port structure
|
|
*
|
|
* @parent: parent device
|
|
* @port_id: port number
|
|
*
|
|
* Allocates a SAS port structure. It will be added to the device tree
|
|
* below the device specified by @parent which must be either a Scsi_Host
|
|
* or a sas_expander_device.
|
|
*
|
|
* Returns %NULL on error
|
|
*/
|
|
struct sas_port *sas_port_alloc(struct device *parent, int port_id)
|
|
{
|
|
struct Scsi_Host *shost = dev_to_shost(parent);
|
|
struct sas_port *port;
|
|
|
|
port = kzalloc(sizeof(*port), GFP_KERNEL);
|
|
if (!port)
|
|
return NULL;
|
|
|
|
port->port_identifier = port_id;
|
|
|
|
device_initialize(&port->dev);
|
|
|
|
port->dev.parent = get_device(parent);
|
|
port->dev.release = sas_port_release;
|
|
|
|
mutex_init(&port->phy_list_mutex);
|
|
INIT_LIST_HEAD(&port->phy_list);
|
|
|
|
if (scsi_is_sas_expander_device(parent)) {
|
|
struct sas_rphy *rphy = dev_to_rphy(parent);
|
|
sprintf(port->dev.bus_id, "port-%d:%d:%d", shost->host_no,
|
|
rphy->scsi_target_id, port->port_identifier);
|
|
} else
|
|
sprintf(port->dev.bus_id, "port-%d:%d", shost->host_no,
|
|
port->port_identifier);
|
|
|
|
transport_setup_device(&port->dev);
|
|
|
|
return port;
|
|
}
|
|
EXPORT_SYMBOL(sas_port_alloc);
|
|
|
|
/** sas_port_alloc_num - allocate and initialize a SAS port structure
|
|
*
|
|
* @parent: parent device
|
|
*
|
|
* Allocates a SAS port structure and a number to go with it. This
|
|
* interface is really for adapters where the port number has no
|
|
* meansing, so the sas class should manage them. It will be added to
|
|
* the device tree below the device specified by @parent which must be
|
|
* either a Scsi_Host or a sas_expander_device.
|
|
*
|
|
* Returns %NULL on error
|
|
*/
|
|
struct sas_port *sas_port_alloc_num(struct device *parent)
|
|
{
|
|
int index;
|
|
struct Scsi_Host *shost = dev_to_shost(parent);
|
|
struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
|
|
|
|
/* FIXME: use idr for this eventually */
|
|
mutex_lock(&sas_host->lock);
|
|
if (scsi_is_sas_expander_device(parent)) {
|
|
struct sas_rphy *rphy = dev_to_rphy(parent);
|
|
struct sas_expander_device *exp = rphy_to_expander_device(rphy);
|
|
|
|
index = exp->next_port_id++;
|
|
} else
|
|
index = sas_host->next_port_id++;
|
|
mutex_unlock(&sas_host->lock);
|
|
return sas_port_alloc(parent, index);
|
|
}
|
|
EXPORT_SYMBOL(sas_port_alloc_num);
|
|
|
|
/**
|
|
* sas_port_add - add a SAS port to the device hierarchy
|
|
* @port: port to be added
|
|
*
|
|
* publishes a port to the rest of the system
|
|
*/
|
|
int sas_port_add(struct sas_port *port)
|
|
{
|
|
int error;
|
|
|
|
/* No phys should be added until this is made visible */
|
|
BUG_ON(!list_empty(&port->phy_list));
|
|
|
|
error = device_add(&port->dev);
|
|
|
|
if (error)
|
|
return error;
|
|
|
|
transport_add_device(&port->dev);
|
|
transport_configure_device(&port->dev);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(sas_port_add);
|
|
|
|
/**
|
|
* sas_port_free - free a SAS PORT
|
|
* @port: SAS PORT to free
|
|
*
|
|
* Frees the specified SAS PORT.
|
|
*
|
|
* Note:
|
|
* This function must only be called on a PORT that has not
|
|
* sucessfully been added using sas_port_add().
|
|
*/
|
|
void sas_port_free(struct sas_port *port)
|
|
{
|
|
transport_destroy_device(&port->dev);
|
|
put_device(&port->dev);
|
|
}
|
|
EXPORT_SYMBOL(sas_port_free);
|
|
|
|
/**
|
|
* sas_port_delete - remove SAS PORT
|
|
* @port: SAS PORT to remove
|
|
*
|
|
* Removes the specified SAS PORT. If the SAS PORT has an
|
|
* associated phys, unlink them from the port as well.
|
|
*/
|
|
void sas_port_delete(struct sas_port *port)
|
|
{
|
|
struct device *dev = &port->dev;
|
|
struct sas_phy *phy, *tmp_phy;
|
|
|
|
if (port->rphy) {
|
|
sas_rphy_delete(port->rphy);
|
|
port->rphy = NULL;
|
|
}
|
|
|
|
mutex_lock(&port->phy_list_mutex);
|
|
list_for_each_entry_safe(phy, tmp_phy, &port->phy_list,
|
|
port_siblings) {
|
|
sas_port_delete_link(port, phy);
|
|
list_del_init(&phy->port_siblings);
|
|
}
|
|
mutex_unlock(&port->phy_list_mutex);
|
|
|
|
if (port->is_backlink) {
|
|
struct device *parent = port->dev.parent;
|
|
|
|
sysfs_remove_link(&port->dev.kobj, parent->bus_id);
|
|
port->is_backlink = 0;
|
|
}
|
|
|
|
transport_remove_device(dev);
|
|
device_del(dev);
|
|
transport_destroy_device(dev);
|
|
put_device(dev);
|
|
}
|
|
EXPORT_SYMBOL(sas_port_delete);
|
|
|
|
/**
|
|
* scsi_is_sas_port - check if a struct device represents a SAS port
|
|
* @dev: device to check
|
|
*
|
|
* Returns:
|
|
* %1 if the device represents a SAS Port, %0 else
|
|
*/
|
|
int scsi_is_sas_port(const struct device *dev)
|
|
{
|
|
return dev->release == sas_port_release;
|
|
}
|
|
EXPORT_SYMBOL(scsi_is_sas_port);
|
|
|
|
/**
|
|
* sas_port_add_phy - add another phy to a port to form a wide port
|
|
* @port: port to add the phy to
|
|
* @phy: phy to add
|
|
*
|
|
* When a port is initially created, it is empty (has no phys). All
|
|
* ports must have at least one phy to operated, and all wide ports
|
|
* must have at least two. The current code makes no difference
|
|
* between ports and wide ports, but the only object that can be
|
|
* connected to a remote device is a port, so ports must be formed on
|
|
* all devices with phys if they're connected to anything.
|
|
*/
|
|
void sas_port_add_phy(struct sas_port *port, struct sas_phy *phy)
|
|
{
|
|
mutex_lock(&port->phy_list_mutex);
|
|
if (unlikely(!list_empty(&phy->port_siblings))) {
|
|
/* make sure we're already on this port */
|
|
struct sas_phy *tmp;
|
|
|
|
list_for_each_entry(tmp, &port->phy_list, port_siblings)
|
|
if (tmp == phy)
|
|
break;
|
|
/* If this trips, you added a phy that was already
|
|
* part of a different port */
|
|
if (unlikely(tmp != phy)) {
|
|
dev_printk(KERN_ERR, &port->dev, "trying to add phy %s fails: it's already part of another port\n", phy->dev.bus_id);
|
|
BUG();
|
|
}
|
|
} else {
|
|
sas_port_create_link(port, phy);
|
|
list_add_tail(&phy->port_siblings, &port->phy_list);
|
|
port->num_phys++;
|
|
}
|
|
mutex_unlock(&port->phy_list_mutex);
|
|
}
|
|
EXPORT_SYMBOL(sas_port_add_phy);
|
|
|
|
/**
|
|
* sas_port_delete_phy - remove a phy from a port or wide port
|
|
* @port: port to remove the phy from
|
|
* @phy: phy to remove
|
|
*
|
|
* This operation is used for tearing down ports again. It must be
|
|
* done to every port or wide port before calling sas_port_delete.
|
|
*/
|
|
void sas_port_delete_phy(struct sas_port *port, struct sas_phy *phy)
|
|
{
|
|
mutex_lock(&port->phy_list_mutex);
|
|
sas_port_delete_link(port, phy);
|
|
list_del_init(&phy->port_siblings);
|
|
port->num_phys--;
|
|
mutex_unlock(&port->phy_list_mutex);
|
|
}
|
|
EXPORT_SYMBOL(sas_port_delete_phy);
|
|
|
|
void sas_port_mark_backlink(struct sas_port *port)
|
|
{
|
|
int res;
|
|
struct device *parent = port->dev.parent->parent->parent;
|
|
|
|
if (port->is_backlink)
|
|
return;
|
|
port->is_backlink = 1;
|
|
res = sysfs_create_link(&port->dev.kobj, &parent->kobj,
|
|
parent->bus_id);
|
|
if (res)
|
|
goto err;
|
|
return;
|
|
err:
|
|
printk(KERN_ERR "%s: Cannot create port backlink, err=%d\n",
|
|
__FUNCTION__, res);
|
|
|
|
}
|
|
EXPORT_SYMBOL(sas_port_mark_backlink);
|
|
|
|
/*
|
|
* SAS remote PHY attributes.
|
|
*/
|
|
|
|
#define sas_rphy_show_simple(field, name, format_string, cast) \
|
|
static ssize_t \
|
|
show_sas_rphy_##name(struct class_device *cdev, char *buf) \
|
|
{ \
|
|
struct sas_rphy *rphy = transport_class_to_rphy(cdev); \
|
|
\
|
|
return snprintf(buf, 20, format_string, cast rphy->field); \
|
|
}
|
|
|
|
#define sas_rphy_simple_attr(field, name, format_string, type) \
|
|
sas_rphy_show_simple(field, name, format_string, (type)) \
|
|
static SAS_CLASS_DEVICE_ATTR(rphy, name, S_IRUGO, \
|
|
show_sas_rphy_##name, NULL)
|
|
|
|
#define sas_rphy_show_protocol(field, name) \
|
|
static ssize_t \
|
|
show_sas_rphy_##name(struct class_device *cdev, char *buf) \
|
|
{ \
|
|
struct sas_rphy *rphy = transport_class_to_rphy(cdev); \
|
|
\
|
|
if (!rphy->field) \
|
|
return snprintf(buf, 20, "none\n"); \
|
|
return get_sas_protocol_names(rphy->field, buf); \
|
|
}
|
|
|
|
#define sas_rphy_protocol_attr(field, name) \
|
|
sas_rphy_show_protocol(field, name) \
|
|
static SAS_CLASS_DEVICE_ATTR(rphy, name, S_IRUGO, \
|
|
show_sas_rphy_##name, NULL)
|
|
|
|
static ssize_t
|
|
show_sas_rphy_device_type(struct class_device *cdev, char *buf)
|
|
{
|
|
struct sas_rphy *rphy = transport_class_to_rphy(cdev);
|
|
|
|
if (!rphy->identify.device_type)
|
|
return snprintf(buf, 20, "none\n");
|
|
return get_sas_device_type_names(
|
|
rphy->identify.device_type, buf);
|
|
}
|
|
|
|
static SAS_CLASS_DEVICE_ATTR(rphy, device_type, S_IRUGO,
|
|
show_sas_rphy_device_type, NULL);
|
|
|
|
static ssize_t
|
|
show_sas_rphy_enclosure_identifier(struct class_device *cdev, char *buf)
|
|
{
|
|
struct sas_rphy *rphy = transport_class_to_rphy(cdev);
|
|
struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
|
|
struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
|
|
struct sas_internal *i = to_sas_internal(shost->transportt);
|
|
u64 identifier;
|
|
int error;
|
|
|
|
/*
|
|
* Only devices behind an expander are supported, because the
|
|
* enclosure identifier is a SMP feature.
|
|
*/
|
|
if (scsi_is_sas_phy_local(phy))
|
|
return -EINVAL;
|
|
|
|
error = i->f->get_enclosure_identifier(rphy, &identifier);
|
|
if (error)
|
|
return error;
|
|
return sprintf(buf, "0x%llx\n", (unsigned long long)identifier);
|
|
}
|
|
|
|
static SAS_CLASS_DEVICE_ATTR(rphy, enclosure_identifier, S_IRUGO,
|
|
show_sas_rphy_enclosure_identifier, NULL);
|
|
|
|
static ssize_t
|
|
show_sas_rphy_bay_identifier(struct class_device *cdev, char *buf)
|
|
{
|
|
struct sas_rphy *rphy = transport_class_to_rphy(cdev);
|
|
struct sas_phy *phy = dev_to_phy(rphy->dev.parent);
|
|
struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
|
|
struct sas_internal *i = to_sas_internal(shost->transportt);
|
|
int val;
|
|
|
|
if (scsi_is_sas_phy_local(phy))
|
|
return -EINVAL;
|
|
|
|
val = i->f->get_bay_identifier(rphy);
|
|
if (val < 0)
|
|
return val;
|
|
return sprintf(buf, "%d\n", val);
|
|
}
|
|
|
|
static SAS_CLASS_DEVICE_ATTR(rphy, bay_identifier, S_IRUGO,
|
|
show_sas_rphy_bay_identifier, NULL);
|
|
|
|
sas_rphy_protocol_attr(identify.initiator_port_protocols,
|
|
initiator_port_protocols);
|
|
sas_rphy_protocol_attr(identify.target_port_protocols, target_port_protocols);
|
|
sas_rphy_simple_attr(identify.sas_address, sas_address, "0x%016llx\n",
|
|
unsigned long long);
|
|
sas_rphy_simple_attr(identify.phy_identifier, phy_identifier, "%d\n", u8);
|
|
|
|
/* only need 8 bytes of data plus header (4 or 8) */
|
|
#define BUF_SIZE 64
|
|
|
|
int sas_read_port_mode_page(struct scsi_device *sdev)
|
|
{
|
|
char *buffer = kzalloc(BUF_SIZE, GFP_KERNEL), *msdata;
|
|
struct sas_rphy *rphy = target_to_rphy(sdev->sdev_target);
|
|
struct sas_end_device *rdev;
|
|
struct scsi_mode_data mode_data;
|
|
int res, error;
|
|
|
|
BUG_ON(rphy->identify.device_type != SAS_END_DEVICE);
|
|
|
|
rdev = rphy_to_end_device(rphy);
|
|
|
|
if (!buffer)
|
|
return -ENOMEM;
|
|
|
|
res = scsi_mode_sense(sdev, 1, 0x19, buffer, BUF_SIZE, 30*HZ, 3,
|
|
&mode_data, NULL);
|
|
|
|
error = -EINVAL;
|
|
if (!scsi_status_is_good(res))
|
|
goto out;
|
|
|
|
msdata = buffer + mode_data.header_length +
|
|
mode_data.block_descriptor_length;
|
|
|
|
if (msdata - buffer > BUF_SIZE - 8)
|
|
goto out;
|
|
|
|
error = 0;
|
|
|
|
rdev->ready_led_meaning = msdata[2] & 0x10 ? 1 : 0;
|
|
rdev->I_T_nexus_loss_timeout = (msdata[4] << 8) + msdata[5];
|
|
rdev->initiator_response_timeout = (msdata[6] << 8) + msdata[7];
|
|
|
|
out:
|
|
kfree(buffer);
|
|
return error;
|
|
}
|
|
EXPORT_SYMBOL(sas_read_port_mode_page);
|
|
|
|
static DECLARE_TRANSPORT_CLASS(sas_end_dev_class,
|
|
"sas_end_device", NULL, NULL, NULL);
|
|
|
|
#define sas_end_dev_show_simple(field, name, format_string, cast) \
|
|
static ssize_t \
|
|
show_sas_end_dev_##name(struct class_device *cdev, char *buf) \
|
|
{ \
|
|
struct sas_rphy *rphy = transport_class_to_rphy(cdev); \
|
|
struct sas_end_device *rdev = rphy_to_end_device(rphy); \
|
|
\
|
|
return snprintf(buf, 20, format_string, cast rdev->field); \
|
|
}
|
|
|
|
#define sas_end_dev_simple_attr(field, name, format_string, type) \
|
|
sas_end_dev_show_simple(field, name, format_string, (type)) \
|
|
static SAS_CLASS_DEVICE_ATTR(end_dev, name, S_IRUGO, \
|
|
show_sas_end_dev_##name, NULL)
|
|
|
|
sas_end_dev_simple_attr(ready_led_meaning, ready_led_meaning, "%d\n", int);
|
|
sas_end_dev_simple_attr(I_T_nexus_loss_timeout, I_T_nexus_loss_timeout,
|
|
"%d\n", int);
|
|
sas_end_dev_simple_attr(initiator_response_timeout, initiator_response_timeout,
|
|
"%d\n", int);
|
|
|
|
static DECLARE_TRANSPORT_CLASS(sas_expander_class,
|
|
"sas_expander", NULL, NULL, NULL);
|
|
|
|
#define sas_expander_show_simple(field, name, format_string, cast) \
|
|
static ssize_t \
|
|
show_sas_expander_##name(struct class_device *cdev, char *buf) \
|
|
{ \
|
|
struct sas_rphy *rphy = transport_class_to_rphy(cdev); \
|
|
struct sas_expander_device *edev = rphy_to_expander_device(rphy); \
|
|
\
|
|
return snprintf(buf, 20, format_string, cast edev->field); \
|
|
}
|
|
|
|
#define sas_expander_simple_attr(field, name, format_string, type) \
|
|
sas_expander_show_simple(field, name, format_string, (type)) \
|
|
static SAS_CLASS_DEVICE_ATTR(expander, name, S_IRUGO, \
|
|
show_sas_expander_##name, NULL)
|
|
|
|
sas_expander_simple_attr(vendor_id, vendor_id, "%s\n", char *);
|
|
sas_expander_simple_attr(product_id, product_id, "%s\n", char *);
|
|
sas_expander_simple_attr(product_rev, product_rev, "%s\n", char *);
|
|
sas_expander_simple_attr(component_vendor_id, component_vendor_id,
|
|
"%s\n", char *);
|
|
sas_expander_simple_attr(component_id, component_id, "%u\n", unsigned int);
|
|
sas_expander_simple_attr(component_revision_id, component_revision_id, "%u\n",
|
|
unsigned int);
|
|
sas_expander_simple_attr(level, level, "%d\n", int);
|
|
|
|
static DECLARE_TRANSPORT_CLASS(sas_rphy_class,
|
|
"sas_device", NULL, NULL, NULL);
|
|
|
|
static int sas_rphy_match(struct attribute_container *cont, struct device *dev)
|
|
{
|
|
struct Scsi_Host *shost;
|
|
struct sas_internal *i;
|
|
|
|
if (!scsi_is_sas_rphy(dev))
|
|
return 0;
|
|
shost = dev_to_shost(dev->parent->parent);
|
|
|
|
if (!shost->transportt)
|
|
return 0;
|
|
if (shost->transportt->host_attrs.ac.class !=
|
|
&sas_host_class.class)
|
|
return 0;
|
|
|
|
i = to_sas_internal(shost->transportt);
|
|
return &i->rphy_attr_cont.ac == cont;
|
|
}
|
|
|
|
static int sas_end_dev_match(struct attribute_container *cont,
|
|
struct device *dev)
|
|
{
|
|
struct Scsi_Host *shost;
|
|
struct sas_internal *i;
|
|
struct sas_rphy *rphy;
|
|
|
|
if (!scsi_is_sas_rphy(dev))
|
|
return 0;
|
|
shost = dev_to_shost(dev->parent->parent);
|
|
rphy = dev_to_rphy(dev);
|
|
|
|
if (!shost->transportt)
|
|
return 0;
|
|
if (shost->transportt->host_attrs.ac.class !=
|
|
&sas_host_class.class)
|
|
return 0;
|
|
|
|
i = to_sas_internal(shost->transportt);
|
|
return &i->end_dev_attr_cont.ac == cont &&
|
|
rphy->identify.device_type == SAS_END_DEVICE;
|
|
}
|
|
|
|
static int sas_expander_match(struct attribute_container *cont,
|
|
struct device *dev)
|
|
{
|
|
struct Scsi_Host *shost;
|
|
struct sas_internal *i;
|
|
struct sas_rphy *rphy;
|
|
|
|
if (!scsi_is_sas_rphy(dev))
|
|
return 0;
|
|
shost = dev_to_shost(dev->parent->parent);
|
|
rphy = dev_to_rphy(dev);
|
|
|
|
if (!shost->transportt)
|
|
return 0;
|
|
if (shost->transportt->host_attrs.ac.class !=
|
|
&sas_host_class.class)
|
|
return 0;
|
|
|
|
i = to_sas_internal(shost->transportt);
|
|
return &i->expander_attr_cont.ac == cont &&
|
|
(rphy->identify.device_type == SAS_EDGE_EXPANDER_DEVICE ||
|
|
rphy->identify.device_type == SAS_FANOUT_EXPANDER_DEVICE);
|
|
}
|
|
|
|
static void sas_expander_release(struct device *dev)
|
|
{
|
|
struct sas_rphy *rphy = dev_to_rphy(dev);
|
|
struct sas_expander_device *edev = rphy_to_expander_device(rphy);
|
|
|
|
put_device(dev->parent);
|
|
kfree(edev);
|
|
}
|
|
|
|
static void sas_end_device_release(struct device *dev)
|
|
{
|
|
struct sas_rphy *rphy = dev_to_rphy(dev);
|
|
struct sas_end_device *edev = rphy_to_end_device(rphy);
|
|
|
|
put_device(dev->parent);
|
|
kfree(edev);
|
|
}
|
|
|
|
/**
|
|
* sas_rphy_initialize - common rphy intialization
|
|
* @rphy: rphy to initialise
|
|
*
|
|
* Used by both sas_end_device_alloc() and sas_expander_alloc() to
|
|
* initialise the common rphy component of each.
|
|
*/
|
|
static void sas_rphy_initialize(struct sas_rphy *rphy)
|
|
{
|
|
INIT_LIST_HEAD(&rphy->list);
|
|
}
|
|
|
|
/**
|
|
* sas_end_device_alloc - allocate an rphy for an end device
|
|
* @parent: which port
|
|
*
|
|
* Allocates an SAS remote PHY structure, connected to @parent.
|
|
*
|
|
* Returns:
|
|
* SAS PHY allocated or %NULL if the allocation failed.
|
|
*/
|
|
struct sas_rphy *sas_end_device_alloc(struct sas_port *parent)
|
|
{
|
|
struct Scsi_Host *shost = dev_to_shost(&parent->dev);
|
|
struct sas_end_device *rdev;
|
|
|
|
rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
|
|
if (!rdev) {
|
|
return NULL;
|
|
}
|
|
|
|
device_initialize(&rdev->rphy.dev);
|
|
rdev->rphy.dev.parent = get_device(&parent->dev);
|
|
rdev->rphy.dev.release = sas_end_device_release;
|
|
if (scsi_is_sas_expander_device(parent->dev.parent)) {
|
|
struct sas_rphy *rphy = dev_to_rphy(parent->dev.parent);
|
|
sprintf(rdev->rphy.dev.bus_id, "end_device-%d:%d:%d",
|
|
shost->host_no, rphy->scsi_target_id, parent->port_identifier);
|
|
} else
|
|
sprintf(rdev->rphy.dev.bus_id, "end_device-%d:%d",
|
|
shost->host_no, parent->port_identifier);
|
|
rdev->rphy.identify.device_type = SAS_END_DEVICE;
|
|
sas_rphy_initialize(&rdev->rphy);
|
|
transport_setup_device(&rdev->rphy.dev);
|
|
|
|
return &rdev->rphy;
|
|
}
|
|
EXPORT_SYMBOL(sas_end_device_alloc);
|
|
|
|
/**
|
|
* sas_expander_alloc - allocate an rphy for an end device
|
|
* @parent: which port
|
|
* @type: SAS_EDGE_EXPANDER_DEVICE or SAS_FANOUT_EXPANDER_DEVICE
|
|
*
|
|
* Allocates an SAS remote PHY structure, connected to @parent.
|
|
*
|
|
* Returns:
|
|
* SAS PHY allocated or %NULL if the allocation failed.
|
|
*/
|
|
struct sas_rphy *sas_expander_alloc(struct sas_port *parent,
|
|
enum sas_device_type type)
|
|
{
|
|
struct Scsi_Host *shost = dev_to_shost(&parent->dev);
|
|
struct sas_expander_device *rdev;
|
|
struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
|
|
|
|
BUG_ON(type != SAS_EDGE_EXPANDER_DEVICE &&
|
|
type != SAS_FANOUT_EXPANDER_DEVICE);
|
|
|
|
rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
|
|
if (!rdev) {
|
|
return NULL;
|
|
}
|
|
|
|
device_initialize(&rdev->rphy.dev);
|
|
rdev->rphy.dev.parent = get_device(&parent->dev);
|
|
rdev->rphy.dev.release = sas_expander_release;
|
|
mutex_lock(&sas_host->lock);
|
|
rdev->rphy.scsi_target_id = sas_host->next_expander_id++;
|
|
mutex_unlock(&sas_host->lock);
|
|
sprintf(rdev->rphy.dev.bus_id, "expander-%d:%d",
|
|
shost->host_no, rdev->rphy.scsi_target_id);
|
|
rdev->rphy.identify.device_type = type;
|
|
sas_rphy_initialize(&rdev->rphy);
|
|
transport_setup_device(&rdev->rphy.dev);
|
|
|
|
return &rdev->rphy;
|
|
}
|
|
EXPORT_SYMBOL(sas_expander_alloc);
|
|
|
|
/**
|
|
* sas_rphy_add - add a SAS remote PHY to the device hierarchy
|
|
* @rphy: The remote PHY to be added
|
|
*
|
|
* Publishes a SAS remote PHY to the rest of the system.
|
|
*/
|
|
int sas_rphy_add(struct sas_rphy *rphy)
|
|
{
|
|
struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
|
|
struct Scsi_Host *shost = dev_to_shost(parent->dev.parent);
|
|
struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
|
|
struct sas_identify *identify = &rphy->identify;
|
|
int error;
|
|
|
|
if (parent->rphy)
|
|
return -ENXIO;
|
|
parent->rphy = rphy;
|
|
|
|
error = device_add(&rphy->dev);
|
|
if (error)
|
|
return error;
|
|
transport_add_device(&rphy->dev);
|
|
transport_configure_device(&rphy->dev);
|
|
if (sas_bsg_initialize(shost, rphy))
|
|
printk("fail to a bsg device %s\n", rphy->dev.bus_id);
|
|
|
|
|
|
mutex_lock(&sas_host->lock);
|
|
list_add_tail(&rphy->list, &sas_host->rphy_list);
|
|
if (identify->device_type == SAS_END_DEVICE &&
|
|
(identify->target_port_protocols &
|
|
(SAS_PROTOCOL_SSP|SAS_PROTOCOL_STP|SAS_PROTOCOL_SATA)))
|
|
rphy->scsi_target_id = sas_host->next_target_id++;
|
|
else if (identify->device_type == SAS_END_DEVICE)
|
|
rphy->scsi_target_id = -1;
|
|
mutex_unlock(&sas_host->lock);
|
|
|
|
if (identify->device_type == SAS_END_DEVICE &&
|
|
rphy->scsi_target_id != -1) {
|
|
scsi_scan_target(&rphy->dev, 0,
|
|
rphy->scsi_target_id, SCAN_WILD_CARD, 0);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(sas_rphy_add);
|
|
|
|
/**
|
|
* sas_rphy_free - free a SAS remote PHY
|
|
* @rphy: SAS remote PHY to free
|
|
*
|
|
* Frees the specified SAS remote PHY.
|
|
*
|
|
* Note:
|
|
* This function must only be called on a remote
|
|
* PHY that has not sucessfully been added using
|
|
* sas_rphy_add() (or has been sas_rphy_remove()'d)
|
|
*/
|
|
void sas_rphy_free(struct sas_rphy *rphy)
|
|
{
|
|
struct device *dev = &rphy->dev;
|
|
struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent->parent);
|
|
struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
|
|
|
|
mutex_lock(&sas_host->lock);
|
|
list_del(&rphy->list);
|
|
mutex_unlock(&sas_host->lock);
|
|
|
|
sas_bsg_remove(shost, rphy);
|
|
|
|
transport_destroy_device(dev);
|
|
|
|
put_device(dev);
|
|
}
|
|
EXPORT_SYMBOL(sas_rphy_free);
|
|
|
|
/**
|
|
* sas_rphy_delete - remove and free SAS remote PHY
|
|
* @rphy: SAS remote PHY to remove and free
|
|
*
|
|
* Removes the specified SAS remote PHY and frees it.
|
|
*/
|
|
void
|
|
sas_rphy_delete(struct sas_rphy *rphy)
|
|
{
|
|
sas_rphy_remove(rphy);
|
|
sas_rphy_free(rphy);
|
|
}
|
|
EXPORT_SYMBOL(sas_rphy_delete);
|
|
|
|
/**
|
|
* sas_rphy_remove - remove SAS remote PHY
|
|
* @rphy: SAS remote phy to remove
|
|
*
|
|
* Removes the specified SAS remote PHY.
|
|
*/
|
|
void
|
|
sas_rphy_remove(struct sas_rphy *rphy)
|
|
{
|
|
struct device *dev = &rphy->dev;
|
|
struct sas_port *parent = dev_to_sas_port(dev->parent);
|
|
|
|
switch (rphy->identify.device_type) {
|
|
case SAS_END_DEVICE:
|
|
scsi_remove_target(dev);
|
|
break;
|
|
case SAS_EDGE_EXPANDER_DEVICE:
|
|
case SAS_FANOUT_EXPANDER_DEVICE:
|
|
sas_remove_children(dev);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
transport_remove_device(dev);
|
|
device_del(dev);
|
|
|
|
parent->rphy = NULL;
|
|
}
|
|
EXPORT_SYMBOL(sas_rphy_remove);
|
|
|
|
/**
|
|
* scsi_is_sas_rphy - check if a struct device represents a SAS remote PHY
|
|
* @dev: device to check
|
|
*
|
|
* Returns:
|
|
* %1 if the device represents a SAS remote PHY, %0 else
|
|
*/
|
|
int scsi_is_sas_rphy(const struct device *dev)
|
|
{
|
|
return dev->release == sas_end_device_release ||
|
|
dev->release == sas_expander_release;
|
|
}
|
|
EXPORT_SYMBOL(scsi_is_sas_rphy);
|
|
|
|
|
|
/*
|
|
* SCSI scan helper
|
|
*/
|
|
|
|
static int sas_user_scan(struct Scsi_Host *shost, uint channel,
|
|
uint id, uint lun)
|
|
{
|
|
struct sas_host_attrs *sas_host = to_sas_host_attrs(shost);
|
|
struct sas_rphy *rphy;
|
|
|
|
mutex_lock(&sas_host->lock);
|
|
list_for_each_entry(rphy, &sas_host->rphy_list, list) {
|
|
if (rphy->identify.device_type != SAS_END_DEVICE ||
|
|
rphy->scsi_target_id == -1)
|
|
continue;
|
|
|
|
if ((channel == SCAN_WILD_CARD || channel == 0) &&
|
|
(id == SCAN_WILD_CARD || id == rphy->scsi_target_id)) {
|
|
scsi_scan_target(&rphy->dev, 0,
|
|
rphy->scsi_target_id, lun, 1);
|
|
}
|
|
}
|
|
mutex_unlock(&sas_host->lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* Setup / Teardown code
|
|
*/
|
|
|
|
#define SETUP_TEMPLATE(attrb, field, perm, test) \
|
|
i->private_##attrb[count] = class_device_attr_##field; \
|
|
i->private_##attrb[count].attr.mode = perm; \
|
|
i->attrb[count] = &i->private_##attrb[count]; \
|
|
if (test) \
|
|
count++
|
|
|
|
#define SETUP_TEMPLATE_RW(attrb, field, perm, test, ro_test, ro_perm) \
|
|
i->private_##attrb[count] = class_device_attr_##field; \
|
|
i->private_##attrb[count].attr.mode = perm; \
|
|
if (ro_test) { \
|
|
i->private_##attrb[count].attr.mode = ro_perm; \
|
|
i->private_##attrb[count].store = NULL; \
|
|
} \
|
|
i->attrb[count] = &i->private_##attrb[count]; \
|
|
if (test) \
|
|
count++
|
|
|
|
#define SETUP_RPORT_ATTRIBUTE(field) \
|
|
SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, 1)
|
|
|
|
#define SETUP_OPTIONAL_RPORT_ATTRIBUTE(field, func) \
|
|
SETUP_TEMPLATE(rphy_attrs, field, S_IRUGO, i->f->func)
|
|
|
|
#define SETUP_PHY_ATTRIBUTE(field) \
|
|
SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, 1)
|
|
|
|
#define SETUP_PHY_ATTRIBUTE_RW(field) \
|
|
SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1, \
|
|
!i->f->set_phy_speed, S_IRUGO)
|
|
|
|
#define SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(field, func) \
|
|
SETUP_TEMPLATE_RW(phy_attrs, field, S_IRUGO | S_IWUSR, 1, \
|
|
!i->f->func, S_IRUGO)
|
|
|
|
#define SETUP_PORT_ATTRIBUTE(field) \
|
|
SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1)
|
|
|
|
#define SETUP_OPTIONAL_PHY_ATTRIBUTE(field, func) \
|
|
SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, i->f->func)
|
|
|
|
#define SETUP_PHY_ATTRIBUTE_WRONLY(field) \
|
|
SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, 1)
|
|
|
|
#define SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(field, func) \
|
|
SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, i->f->func)
|
|
|
|
#define SETUP_END_DEV_ATTRIBUTE(field) \
|
|
SETUP_TEMPLATE(end_dev_attrs, field, S_IRUGO, 1)
|
|
|
|
#define SETUP_EXPANDER_ATTRIBUTE(field) \
|
|
SETUP_TEMPLATE(expander_attrs, expander_##field, S_IRUGO, 1)
|
|
|
|
/**
|
|
* sas_attach_transport - instantiate SAS transport template
|
|
* @ft: SAS transport class function template
|
|
*/
|
|
struct scsi_transport_template *
|
|
sas_attach_transport(struct sas_function_template *ft)
|
|
{
|
|
struct sas_internal *i;
|
|
int count;
|
|
|
|
i = kzalloc(sizeof(struct sas_internal), GFP_KERNEL);
|
|
if (!i)
|
|
return NULL;
|
|
|
|
i->t.user_scan = sas_user_scan;
|
|
|
|
i->t.host_attrs.ac.attrs = &i->host_attrs[0];
|
|
i->t.host_attrs.ac.class = &sas_host_class.class;
|
|
i->t.host_attrs.ac.match = sas_host_match;
|
|
transport_container_register(&i->t.host_attrs);
|
|
i->t.host_size = sizeof(struct sas_host_attrs);
|
|
|
|
i->phy_attr_cont.ac.class = &sas_phy_class.class;
|
|
i->phy_attr_cont.ac.attrs = &i->phy_attrs[0];
|
|
i->phy_attr_cont.ac.match = sas_phy_match;
|
|
transport_container_register(&i->phy_attr_cont);
|
|
|
|
i->port_attr_cont.ac.class = &sas_port_class.class;
|
|
i->port_attr_cont.ac.attrs = &i->port_attrs[0];
|
|
i->port_attr_cont.ac.match = sas_port_match;
|
|
transport_container_register(&i->port_attr_cont);
|
|
|
|
i->rphy_attr_cont.ac.class = &sas_rphy_class.class;
|
|
i->rphy_attr_cont.ac.attrs = &i->rphy_attrs[0];
|
|
i->rphy_attr_cont.ac.match = sas_rphy_match;
|
|
transport_container_register(&i->rphy_attr_cont);
|
|
|
|
i->end_dev_attr_cont.ac.class = &sas_end_dev_class.class;
|
|
i->end_dev_attr_cont.ac.attrs = &i->end_dev_attrs[0];
|
|
i->end_dev_attr_cont.ac.match = sas_end_dev_match;
|
|
transport_container_register(&i->end_dev_attr_cont);
|
|
|
|
i->expander_attr_cont.ac.class = &sas_expander_class.class;
|
|
i->expander_attr_cont.ac.attrs = &i->expander_attrs[0];
|
|
i->expander_attr_cont.ac.match = sas_expander_match;
|
|
transport_container_register(&i->expander_attr_cont);
|
|
|
|
i->f = ft;
|
|
|
|
count = 0;
|
|
SETUP_PORT_ATTRIBUTE(num_phys);
|
|
i->host_attrs[count] = NULL;
|
|
|
|
count = 0;
|
|
SETUP_PHY_ATTRIBUTE(initiator_port_protocols);
|
|
SETUP_PHY_ATTRIBUTE(target_port_protocols);
|
|
SETUP_PHY_ATTRIBUTE(device_type);
|
|
SETUP_PHY_ATTRIBUTE(sas_address);
|
|
SETUP_PHY_ATTRIBUTE(phy_identifier);
|
|
//SETUP_PHY_ATTRIBUTE(port_identifier);
|
|
SETUP_PHY_ATTRIBUTE(negotiated_linkrate);
|
|
SETUP_PHY_ATTRIBUTE(minimum_linkrate_hw);
|
|
SETUP_PHY_ATTRIBUTE_RW(minimum_linkrate);
|
|
SETUP_PHY_ATTRIBUTE(maximum_linkrate_hw);
|
|
SETUP_PHY_ATTRIBUTE_RW(maximum_linkrate);
|
|
|
|
SETUP_PHY_ATTRIBUTE(invalid_dword_count);
|
|
SETUP_PHY_ATTRIBUTE(running_disparity_error_count);
|
|
SETUP_PHY_ATTRIBUTE(loss_of_dword_sync_count);
|
|
SETUP_PHY_ATTRIBUTE(phy_reset_problem_count);
|
|
SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(link_reset, phy_reset);
|
|
SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(hard_reset, phy_reset);
|
|
SETUP_OPTIONAL_PHY_ATTRIBUTE_RW(enable, phy_enable);
|
|
i->phy_attrs[count] = NULL;
|
|
|
|
count = 0;
|
|
SETUP_PORT_ATTRIBUTE(num_phys);
|
|
i->port_attrs[count] = NULL;
|
|
|
|
count = 0;
|
|
SETUP_RPORT_ATTRIBUTE(rphy_initiator_port_protocols);
|
|
SETUP_RPORT_ATTRIBUTE(rphy_target_port_protocols);
|
|
SETUP_RPORT_ATTRIBUTE(rphy_device_type);
|
|
SETUP_RPORT_ATTRIBUTE(rphy_sas_address);
|
|
SETUP_RPORT_ATTRIBUTE(rphy_phy_identifier);
|
|
SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_enclosure_identifier,
|
|
get_enclosure_identifier);
|
|
SETUP_OPTIONAL_RPORT_ATTRIBUTE(rphy_bay_identifier,
|
|
get_bay_identifier);
|
|
i->rphy_attrs[count] = NULL;
|
|
|
|
count = 0;
|
|
SETUP_END_DEV_ATTRIBUTE(end_dev_ready_led_meaning);
|
|
SETUP_END_DEV_ATTRIBUTE(end_dev_I_T_nexus_loss_timeout);
|
|
SETUP_END_DEV_ATTRIBUTE(end_dev_initiator_response_timeout);
|
|
i->end_dev_attrs[count] = NULL;
|
|
|
|
count = 0;
|
|
SETUP_EXPANDER_ATTRIBUTE(vendor_id);
|
|
SETUP_EXPANDER_ATTRIBUTE(product_id);
|
|
SETUP_EXPANDER_ATTRIBUTE(product_rev);
|
|
SETUP_EXPANDER_ATTRIBUTE(component_vendor_id);
|
|
SETUP_EXPANDER_ATTRIBUTE(component_id);
|
|
SETUP_EXPANDER_ATTRIBUTE(component_revision_id);
|
|
SETUP_EXPANDER_ATTRIBUTE(level);
|
|
i->expander_attrs[count] = NULL;
|
|
|
|
return &i->t;
|
|
}
|
|
EXPORT_SYMBOL(sas_attach_transport);
|
|
|
|
/**
|
|
* sas_release_transport - release SAS transport template instance
|
|
* @t: transport template instance
|
|
*/
|
|
void sas_release_transport(struct scsi_transport_template *t)
|
|
{
|
|
struct sas_internal *i = to_sas_internal(t);
|
|
|
|
transport_container_unregister(&i->t.host_attrs);
|
|
transport_container_unregister(&i->phy_attr_cont);
|
|
transport_container_unregister(&i->port_attr_cont);
|
|
transport_container_unregister(&i->rphy_attr_cont);
|
|
transport_container_unregister(&i->end_dev_attr_cont);
|
|
transport_container_unregister(&i->expander_attr_cont);
|
|
|
|
kfree(i);
|
|
}
|
|
EXPORT_SYMBOL(sas_release_transport);
|
|
|
|
static __init int sas_transport_init(void)
|
|
{
|
|
int error;
|
|
|
|
error = transport_class_register(&sas_host_class);
|
|
if (error)
|
|
goto out;
|
|
error = transport_class_register(&sas_phy_class);
|
|
if (error)
|
|
goto out_unregister_transport;
|
|
error = transport_class_register(&sas_port_class);
|
|
if (error)
|
|
goto out_unregister_phy;
|
|
error = transport_class_register(&sas_rphy_class);
|
|
if (error)
|
|
goto out_unregister_port;
|
|
error = transport_class_register(&sas_end_dev_class);
|
|
if (error)
|
|
goto out_unregister_rphy;
|
|
error = transport_class_register(&sas_expander_class);
|
|
if (error)
|
|
goto out_unregister_end_dev;
|
|
|
|
return 0;
|
|
|
|
out_unregister_end_dev:
|
|
transport_class_unregister(&sas_end_dev_class);
|
|
out_unregister_rphy:
|
|
transport_class_unregister(&sas_rphy_class);
|
|
out_unregister_port:
|
|
transport_class_unregister(&sas_port_class);
|
|
out_unregister_phy:
|
|
transport_class_unregister(&sas_phy_class);
|
|
out_unregister_transport:
|
|
transport_class_unregister(&sas_host_class);
|
|
out:
|
|
return error;
|
|
|
|
}
|
|
|
|
static void __exit sas_transport_exit(void)
|
|
{
|
|
transport_class_unregister(&sas_host_class);
|
|
transport_class_unregister(&sas_phy_class);
|
|
transport_class_unregister(&sas_port_class);
|
|
transport_class_unregister(&sas_rphy_class);
|
|
transport_class_unregister(&sas_end_dev_class);
|
|
transport_class_unregister(&sas_expander_class);
|
|
}
|
|
|
|
MODULE_AUTHOR("Christoph Hellwig");
|
|
MODULE_DESCRIPTION("SAS Transport Attributes");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
module_init(sas_transport_init);
|
|
module_exit(sas_transport_exit);
|