245 lines
6.8 KiB
C
245 lines
6.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef SCSI_TRANSPORT_SAS_H
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#define SCSI_TRANSPORT_SAS_H
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#include <linux/transport_class.h>
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#include <linux/types.h>
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#include <linux/mutex.h>
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#include <scsi/sas.h>
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#include <linux/bsg-lib.h>
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struct scsi_transport_template;
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struct sas_rphy;
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struct request;
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#if !IS_ENABLED(CONFIG_SCSI_SAS_ATTRS)
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static inline int scsi_is_sas_rphy(const struct device *sdev)
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{
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return 0;
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}
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#else
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extern int scsi_is_sas_rphy(const struct device *);
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#endif
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static inline int sas_protocol_ata(enum sas_protocol proto)
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{
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return ((proto & SAS_PROTOCOL_SATA) ||
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(proto & SAS_PROTOCOL_STP))? 1 : 0;
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}
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enum sas_linkrate {
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/* These Values are defined in the SAS standard */
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SAS_LINK_RATE_UNKNOWN = 0,
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SAS_PHY_DISABLED = 1,
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SAS_PHY_RESET_PROBLEM = 2,
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SAS_SATA_SPINUP_HOLD = 3,
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SAS_SATA_PORT_SELECTOR = 4,
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SAS_PHY_RESET_IN_PROGRESS = 5,
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SAS_LINK_RATE_1_5_GBPS = 8,
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SAS_LINK_RATE_G1 = SAS_LINK_RATE_1_5_GBPS,
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SAS_LINK_RATE_3_0_GBPS = 9,
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SAS_LINK_RATE_G2 = SAS_LINK_RATE_3_0_GBPS,
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SAS_LINK_RATE_6_0_GBPS = 10,
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SAS_LINK_RATE_12_0_GBPS = 11,
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/* These are virtual to the transport class and may never
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* be signalled normally since the standard defined field
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* is only 4 bits */
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SAS_LINK_RATE_FAILED = 0x10,
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SAS_PHY_VIRTUAL = 0x11,
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};
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struct sas_identify {
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enum sas_device_type device_type;
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enum sas_protocol initiator_port_protocols;
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enum sas_protocol target_port_protocols;
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u64 sas_address;
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u8 phy_identifier;
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};
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struct sas_phy {
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struct device dev;
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int number;
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int enabled;
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/* phy identification */
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struct sas_identify identify;
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/* phy attributes */
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enum sas_linkrate negotiated_linkrate;
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enum sas_linkrate minimum_linkrate_hw;
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enum sas_linkrate minimum_linkrate;
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enum sas_linkrate maximum_linkrate_hw;
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enum sas_linkrate maximum_linkrate;
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/* link error statistics */
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u32 invalid_dword_count;
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u32 running_disparity_error_count;
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u32 loss_of_dword_sync_count;
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u32 phy_reset_problem_count;
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/* for the list of phys belonging to a port */
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struct list_head port_siblings;
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/* available to the lldd */
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void *hostdata;
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};
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#define dev_to_phy(d) \
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container_of((d), struct sas_phy, dev)
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#define transport_class_to_phy(dev) \
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dev_to_phy((dev)->parent)
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#define phy_to_shost(phy) \
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dev_to_shost((phy)->dev.parent)
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struct request_queue;
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struct sas_rphy {
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struct device dev;
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struct sas_identify identify;
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struct list_head list;
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struct request_queue *q;
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u32 scsi_target_id;
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};
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#define dev_to_rphy(d) \
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container_of((d), struct sas_rphy, dev)
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#define transport_class_to_rphy(dev) \
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dev_to_rphy((dev)->parent)
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#define rphy_to_shost(rphy) \
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dev_to_shost((rphy)->dev.parent)
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#define target_to_rphy(targ) \
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dev_to_rphy((targ)->dev.parent)
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struct sas_end_device {
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struct sas_rphy rphy;
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/* flags */
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unsigned ready_led_meaning:1;
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unsigned tlr_supported:1;
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unsigned tlr_enabled:1;
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/* parameters */
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u16 I_T_nexus_loss_timeout;
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u16 initiator_response_timeout;
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};
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#define rphy_to_end_device(r) \
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container_of((r), struct sas_end_device, rphy)
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struct sas_expander_device {
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int level;
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int next_port_id;
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#define SAS_EXPANDER_VENDOR_ID_LEN 8
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char vendor_id[SAS_EXPANDER_VENDOR_ID_LEN+1];
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#define SAS_EXPANDER_PRODUCT_ID_LEN 16
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char product_id[SAS_EXPANDER_PRODUCT_ID_LEN+1];
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#define SAS_EXPANDER_PRODUCT_REV_LEN 4
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char product_rev[SAS_EXPANDER_PRODUCT_REV_LEN+1];
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#define SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN 8
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char component_vendor_id[SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN+1];
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u16 component_id;
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u8 component_revision_id;
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struct sas_rphy rphy;
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};
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#define rphy_to_expander_device(r) \
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container_of((r), struct sas_expander_device, rphy)
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struct sas_port {
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struct device dev;
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int port_identifier;
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int num_phys;
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/* port flags */
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unsigned int is_backlink:1;
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/* the other end of the link */
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struct sas_rphy *rphy;
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struct mutex phy_list_mutex;
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struct list_head phy_list;
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struct list_head del_list; /* libsas only */
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};
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#define dev_to_sas_port(d) \
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container_of((d), struct sas_port, dev)
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#define transport_class_to_sas_port(dev) \
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dev_to_sas_port((dev)->parent)
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struct sas_phy_linkrates {
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enum sas_linkrate maximum_linkrate;
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enum sas_linkrate minimum_linkrate;
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};
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/* The functions by which the transport class and the driver communicate */
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struct sas_function_template {
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int (*get_linkerrors)(struct sas_phy *);
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int (*get_enclosure_identifier)(struct sas_rphy *, u64 *);
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int (*get_bay_identifier)(struct sas_rphy *);
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int (*phy_reset)(struct sas_phy *, int);
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int (*phy_enable)(struct sas_phy *, int);
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int (*phy_setup)(struct sas_phy *);
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void (*phy_release)(struct sas_phy *);
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int (*set_phy_speed)(struct sas_phy *, struct sas_phy_linkrates *);
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void (*smp_handler)(struct bsg_job *, struct Scsi_Host *,
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struct sas_rphy *);
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};
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void sas_remove_children(struct device *);
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extern void sas_remove_host(struct Scsi_Host *);
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extern struct sas_phy *sas_phy_alloc(struct device *, int);
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extern void sas_phy_free(struct sas_phy *);
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extern int sas_phy_add(struct sas_phy *);
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extern void sas_phy_delete(struct sas_phy *);
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extern int scsi_is_sas_phy(const struct device *);
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u64 sas_get_address(struct scsi_device *);
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unsigned int sas_tlr_supported(struct scsi_device *);
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unsigned int sas_is_tlr_enabled(struct scsi_device *);
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void sas_disable_tlr(struct scsi_device *);
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void sas_enable_tlr(struct scsi_device *);
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extern struct sas_rphy *sas_end_device_alloc(struct sas_port *);
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extern struct sas_rphy *sas_expander_alloc(struct sas_port *, enum sas_device_type);
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void sas_rphy_free(struct sas_rphy *);
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extern int sas_rphy_add(struct sas_rphy *);
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extern void sas_rphy_remove(struct sas_rphy *);
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extern void sas_rphy_delete(struct sas_rphy *);
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extern void sas_rphy_unlink(struct sas_rphy *);
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struct sas_port *sas_port_alloc(struct device *, int);
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struct sas_port *sas_port_alloc_num(struct device *);
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int sas_port_add(struct sas_port *);
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void sas_port_free(struct sas_port *);
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void sas_port_delete(struct sas_port *);
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void sas_port_add_phy(struct sas_port *, struct sas_phy *);
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void sas_port_delete_phy(struct sas_port *, struct sas_phy *);
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void sas_port_mark_backlink(struct sas_port *);
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int scsi_is_sas_port(const struct device *);
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struct sas_phy *sas_port_get_phy(struct sas_port *port);
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static inline void sas_port_put_phy(struct sas_phy *phy)
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{
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if (phy)
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put_device(&phy->dev);
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}
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extern struct scsi_transport_template *
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sas_attach_transport(struct sas_function_template *);
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extern void sas_release_transport(struct scsi_transport_template *);
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int sas_read_port_mode_page(struct scsi_device *);
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static inline int
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scsi_is_sas_expander_device(struct device *dev)
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{
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struct sas_rphy *rphy;
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if (!scsi_is_sas_rphy(dev))
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return 0;
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rphy = dev_to_rphy(dev);
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return rphy->identify.device_type == SAS_FANOUT_EXPANDER_DEVICE ||
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rphy->identify.device_type == SAS_EDGE_EXPANDER_DEVICE;
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}
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#define scsi_is_sas_phy_local(phy) scsi_is_host_device((phy)->dev.parent)
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#endif /* SCSI_TRANSPORT_SAS_H */
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