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244 lines
6.8 KiB
244 lines
6.8 KiB
/* 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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