/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved. */ #ifndef _SYS_SUNNDI_H #define _SYS_SUNNDI_H /* * Sun Specific NDI definitions */ #include #include #include #ifdef __cplusplus extern "C" { #endif #ifdef _KERNEL #define NDI_SUCCESS DDI_SUCCESS /* successful return */ #define NDI_FAILURE DDI_FAILURE /* unsuccessful return */ #define NDI_NOMEM -2 /* failed to allocate resources */ #define NDI_BADHANDLE -3 /* bad handle passed to in function */ #define NDI_FAULT -4 /* fault during copyin/copyout */ #define NDI_BUSY -5 /* device busy - could not offline */ #define NDI_UNBOUND -6 /* device not bound to a driver */ #define NDI_EINVAL -7 /* invalid request or arguments */ #define NDI_ENOTSUP -8 /* operation or event not supported */ #define NDI_CLAIMED NDI_SUCCESS /* event is claimed */ #define NDI_UNCLAIMED -9 /* event is not claimed */ /* * Property functions: See also, ddipropdefs.h. * In general, the underlying driver MUST be held * to call it's property functions. */ /* * Used to create boolean properties */ int ndi_prop_create_boolean(dev_t match_dev, dev_info_t *dip, char *name); /* * Used to create, modify, and lookup integer properties */ int ndi_prop_update_int(dev_t match_dev, dev_info_t *dip, char *name, int data); int ndi_prop_update_int_array(dev_t match_dev, dev_info_t *dip, char *name, int *data, uint_t nelements); int ndi_prop_update_int64(dev_t match_dev, dev_info_t *dip, char *name, int64_t data); int ndi_prop_update_int64_array(dev_t match_dev, dev_info_t *dip, char *name, int64_t *data, uint_t nelements); /* * Used to create, modify, and lookup string properties */ int ndi_prop_update_string(dev_t match_dev, dev_info_t *dip, char *name, char *data); int ndi_prop_update_string_array(dev_t match_dev, dev_info_t *dip, char *name, char **data, uint_t nelements); /* * Used to create, modify, and lookup byte properties */ int ndi_prop_update_byte_array(dev_t match_dev, dev_info_t *dip, char *name, uchar_t *data, uint_t nelements); /* * Used to remove properties */ int ndi_prop_remove(dev_t dev, dev_info_t *dip, char *name); void ndi_prop_remove_all(dev_info_t *dip); /* * Nexus Driver Functions */ /* * Allocate and initialize a new dev_info structure. * This routine will often be called at interrupt time by a nexus in * response to a hotplug event, therefore memory allocations are * not allowed to sleep. */ int ndi_devi_alloc(dev_info_t *parent, char *node_name, pnode_t nodeid, dev_info_t **ret_dip); void ndi_devi_alloc_sleep(dev_info_t *parent, char *node_name, pnode_t nodeid, dev_info_t **ret_dip); /* * Remove an initialized (but not yet attached) dev_info * node from it's parent. */ int ndi_devi_free(dev_info_t *dip); /* devinfo locking: use DEVI_BUSY_OWNED in ASSERTs to verify */ void ndi_devi_enter(dev_info_t *dip, int *circ); void ndi_devi_exit(dev_info_t *dip, int circ); int ndi_devi_tryenter(dev_info_t *dip, int *circ); /* devinfo ref counting */ void ndi_hold_devi(dev_info_t *dip); void ndi_rele_devi(dev_info_t *dip); /* driver ref counting */ struct dev_ops *ndi_hold_driver(dev_info_t *dip); void ndi_rele_driver(dev_info_t *dip); /* * Change the node name */ int ndi_devi_set_nodename(dev_info_t *dip, char *name, int flags); /* * Place the devinfo in the DS_BOUND state, * binding a driver to the device * * Flags: * all flags are ignored. */ int ndi_devi_bind_driver(dev_info_t *dip, uint_t flags); /* * Asynchronous version of ndi_devi_bind_driver, callable from * interrupt context. The dip must be a persistent node. */ int ndi_devi_bind_driver_async(dev_info_t *dip, uint_t flags); /* * Return devctl state of the child addressed by "name@addr". * For use by a driver's DEVCTL_DEVICE_GETSTATE handler. */ int ndi_devctl_device_getstate(dev_info_t *parent, struct devctl_iocdata *dcp, uint_t *state); /* * Transition the child addressed by "name@addr" to the online state. * For use by a driver's DEVCTL_DEVICE_ONLINE handler. */ int ndi_devctl_device_online(dev_info_t *dip, struct devctl_iocdata *dcp, uint_t flags); /* * Transition the child addressed by "name@addr" to the offline state. * For use by a driver's DEVCTL_DEVICE_OFFLINE handler. */ int ndi_devctl_device_offline(dev_info_t *dip, struct devctl_iocdata *dcp, uint_t flags); /* * Remove the child addressed by name@addr. * For use by a driver's DEVCTL_DEVICE_REMOVE handler. */ int ndi_devctl_device_remove(dev_info_t *dip, struct devctl_iocdata *dcp, uint_t flags); /* * Bus get state * For use by a driver's DEVCTL_BUS_GETSTATE handler. */ int ndi_devctl_bus_getstate(dev_info_t *dip, struct devctl_iocdata *dcp, uint_t *state); /* * Place the devinfo in the ONLINE state */ int ndi_devi_online(dev_info_t *dip, uint_t flags); /* * Generic devctl ioctl handler */ int ndi_devctl_ioctl(dev_info_t *dip, int cmd, intptr_t arg, int mode, uint_t flags); /* * Asynchronous version of ndi_devi_online, callable from interrupt * context. The dip must be a persistent node. */ int ndi_devi_online_async(dev_info_t *dip, uint_t flags); /* * Configure children of a nexus node. * * Flags: * NDI_ONLINE_ATTACH - Attach driver to devinfo node when placing * the device Online. * NDI_CONFIG - Recursively configure children if child is nexus node */ int ndi_devi_config(dev_info_t *dip, int flags); int ndi_devi_config_driver(dev_info_t *dip, int flags, major_t major); int ndi_devi_config_one(dev_info_t *dip, char *devnm, dev_info_t **dipp, int flags); /* * Unconfigure children of a nexus node. * * Flags: * NDI_DEVI_REMOVE - Remove child devinfo nodes * * NDI_UNCONFIG - Put child devinfo nodes to uninitialized state, * release resources held by child nodes. */ int ndi_devi_unconfig(dev_info_t *dip, int flags); int e_ddi_devi_unconfig(dev_info_t *dip, dev_info_t **dipp, int flags); int ndi_devi_unconfig_one(dev_info_t *dip, char *devnm, dev_info_t **dipp, int flags); int ndi_devi_unconfig_driver(dev_info_t *dip, int flags, major_t major); void ndi_set_bus_private(dev_info_t *dip, boolean_t up, uint32_t port_type, void *data); void * ndi_get_bus_private(dev_info_t *dip, boolean_t up); boolean_t ndi_port_type(dev_info_t *dip, boolean_t up, uint32_t port_type); /* * Interrupt Resource Management (IRM) Pools. */ int ndi_irm_create(dev_info_t *dip, ddi_irm_params_t *paramsp, ddi_irm_pool_t **pool_retp); int ndi_irm_destroy(ddi_irm_pool_t *poolp); int ndi_irm_resize_pool(ddi_irm_pool_t *poolp, uint_t newsize); /* * Take a device node "Offline". * * Offline means to detach the device instance from the bound * driver and setting the devinfo state to prevent deferred attach * from re-attaching the device instance. * * Flags: * NDI_DEVI_REMOVE - Remove the node from the devinfo tree after * first taking it Offline. */ #define NDI_DEVI_REMOVE 0x00000001 /* remove after unconfig */ #define NDI_ONLINE_ATTACH 0x00000002 /* online/attach after config */ #define NDI_MDI_FALLBACK 0x00000004 /* Leadville to fallback to phci */ #define NDI_CONFIG 0x00000008 /* recursively config descendants */ #define NDI_UNCONFIG 0x00000010 /* unconfig to uninitialized state */ #define NDI_DEVI_BIND 0x00000020 /* transition to DS_BOUND state */ #define NDI_DEVI_PERSIST 0x00000040 /* do not config offlined nodes */ #define NDI_PROMNAME 0x00000080 /* name comes from prom */ #define NDI_DEVFS_CLEAN 0x00001000 /* clean dv_nodes only, no detach */ #define NDI_AUTODETACH 0x00002000 /* moduninstall daemon */ #define NDI_NO_EVENT 0x00004000 /* don't devfs add/remove events */ #define NDI_DEVI_DEBUG 0x00008000 /* turn on observability */ #define NDI_CONFIG_REPROBE 0x00010000 /* force reprobe (deferred attach) */ #define NDI_DEVI_ONLINE 0x00020000 /* force offlined device to online */ #define NDI_DEVI_OFFLINE 0x00040000 /* set detached device to offline */ #define NDI_POST_EVENT 0x00080000 /* Post NDI events before remove */ #define NDI_BRANCH_EVENT_OP 0x01000000 /* branch op needs branch event */ #define NDI_NO_EVENT_STATE_CHNG 0x02000000 /* don't change the event state */ #define NDI_DRV_CONF_REPROBE 0x04000000 /* reprobe conf-enum'd nodes only */ #define NDI_DETACH_DRIVER 0x08000000 /* performing driver_detach */ #define NDI_MTC_OFF 0x10000000 /* disable multi-threading */ #define NDI_USER_REQ 0x20000000 /* user requested operation */ /* ndi interface flag values */ #define NDI_SLEEP 0x000000 #define NDI_NOSLEEP 0x100000 #define NDI_EVENT_NOPASS 0x200000 /* do not pass event req up the tree */ int ndi_devi_offline(dev_info_t *dip, uint_t flags); /* * Find the child dev_info node of parent nexus 'p' whose name * matches "cname"@"caddr". Use ndi_devi_findchild() instead. */ dev_info_t * ndi_devi_find(dev_info_t *p, char *cname, char *caddr); /* * Find the child dev_info node of parent nexus 'p' whose name * matches device name "name"@"addr". */ dev_info_t * ndi_devi_findchild(dev_info_t *p, char *devname); /* * Find the child dev_info node of parent nexus 'p' whose name * matches "dname"@"ua". If a child doesn't have a "ua" * value, it calls the function "make_ua" to create it. */ dev_info_t * ndi_devi_findchild_by_callback(dev_info_t *p, char *dname, char *ua, int (*make_ua)(dev_info_t *, char *, int)); /* * Maintain DEVI_DEVICE_REMOVED hotplug devi_state for remove/reinsert hotplug * of open devices. */ int ndi_devi_device_isremoved(dev_info_t *dip); int ndi_devi_device_remove(dev_info_t *dip); int ndi_devi_device_insert(dev_info_t *dip); /* * generate debug msg via NDI_DEVI_DEBUG flag */ #define NDI_DEBUG(flags, args) \ if (flags & NDI_DEVI_DEBUG) cmn_err args /* * Copy in the devctl IOCTL data structure and the strings referenced * by the structure. * * Convenience functions for use by nexus drivers as part of the * implementation of devctl IOCTL handling. */ int ndi_dc_allochdl(void *iocarg, struct devctl_iocdata **rdcp); void ndi_dc_freehdl(struct devctl_iocdata *dcp); char * ndi_dc_getpath(struct devctl_iocdata *dcp); char * ndi_dc_getname(struct devctl_iocdata *dcp); char * ndi_dc_getaddr(struct devctl_iocdata *dcp); nvlist_t * ndi_dc_get_ap_data(struct devctl_iocdata *dcp); char * ndi_dc_getminorname(struct devctl_iocdata *dcp); int ndi_dc_return_dev_state(dev_info_t *dip, struct devctl_iocdata *dcp); int ndi_dc_return_ap_state(devctl_ap_state_t *ap, struct devctl_iocdata *dcp); int ndi_dc_return_bus_state(dev_info_t *dip, struct devctl_iocdata *dcp); int ndi_dc_devi_create(struct devctl_iocdata *dcp, dev_info_t *pdip, int flags, dev_info_t **rdip); int ndi_get_bus_state(dev_info_t *dip, uint_t *rstate); int ndi_set_bus_state(dev_info_t *dip, uint_t state); /* * Post an event notification up the device tree hierarchy to the * parent nexus, until claimed by a bus nexus driver or the top * of the dev_info tree is reached. */ int ndi_post_event(dev_info_t *dip, dev_info_t *rdip, ddi_eventcookie_t eventhdl, void *impl_data); /* * Called by the NDI Event Framework to deliver a registration request to the * appropriate bus nexus driver. */ int ndi_busop_add_eventcall(dev_info_t *dip, dev_info_t *rdip, ddi_eventcookie_t eventhdl, void (*callback)(), void *arg, ddi_callback_id_t *cb_id); /* * Called by the NDI Event Framework to deliver an unregister request to the * appropriate bus nexus driver. */ int ndi_busop_remove_eventcall(dev_info_t *ddip, ddi_callback_id_t id); /* * Called by the NDI Event Framework and/or a bus nexus driver's * implementation of the (*bus_get_eventcookie)() interface up the device tree * hierarchy, until claimed by a bus nexus driver or the top of the dev_info * tree is reached. The NDI Event Framework will skip nexus drivers which are * not configured to handle NDI events. */ int ndi_busop_get_eventcookie(dev_info_t *dip, dev_info_t *rdip, char *name, ddi_eventcookie_t *event_cookiep); /* * ndi event callback support routines: * * these functions require an opaque ndi event handle */ typedef struct ndi_event_hdl *ndi_event_hdl_t; /* * structure for maintaining each registered callback */ typedef struct ndi_event_callbacks { struct ndi_event_callbacks *ndi_evtcb_next; struct ndi_event_callbacks *ndi_evtcb_prev; dev_info_t *ndi_evtcb_dip; char *devname; /* name of device defining this callback */ void (*ndi_evtcb_callback)(); void *ndi_evtcb_arg; ddi_eventcookie_t ndi_evtcb_cookie; } ndi_event_callbacks_t; /* * a nexus driver defines events that it can support using the * following structure */ typedef struct ndi_event_definition { int ndi_event_tag; char *ndi_event_name; ddi_plevel_t ndi_event_plevel; uint_t ndi_event_attributes; } ndi_event_definition_t; typedef struct ndi_event_cookie { ndi_event_definition_t *definition; /* Event Description */ dev_info_t *ddip; /* Devi defining this event */ ndi_event_callbacks_t *callback_list; /* Cb's reg'd to w/ this evt */ struct ndi_event_cookie *next_cookie; /* Next cookie def'd in hdl */ } ndi_event_cookie_t; #define NDI_EVENT(cookie) ((struct ndi_event_cookie *)(void *)(cookie)) #define NDI_EVENT_NAME(cookie) (NDI_EVENT(cookie)->definition->ndi_event_name) #define NDI_EVENT_TAG(cookie) (NDI_EVENT(cookie)->definition->ndi_event_tag) #define NDI_EVENT_ATTRIBUTES(cookie) \ (NDI_EVENT(cookie)->definition->ndi_event_attributes) #define NDI_EVENT_PLEVEL(cookie) \ (NDI_EVENT(cookie)->definition->ndi_event_plevel) #define NDI_EVENT_DDIP(cookie) (NDI_EVENT(cookie)->ddip) /* ndi_event_attributes */ #define NDI_EVENT_POST_TO_ALL 0x0 /* broadcast: post to all handlers */ #define NDI_EVENT_POST_TO_TGT 0x1 /* call only specific child's hdlr */ typedef struct ndi_event_set { ushort_t ndi_events_version; ushort_t ndi_n_events; ndi_event_definition_t *ndi_event_defs; } ndi_event_set_t; #define NDI_EVENTS_REV0 0 #define NDI_EVENTS_REV1 1 /* * allocate an ndi event handle */ int ndi_event_alloc_hdl(dev_info_t *dip, ddi_iblock_cookie_t cookie, ndi_event_hdl_t *ndi_event_hdl, uint_t flag); /* * free the ndi event handle */ int ndi_event_free_hdl(ndi_event_hdl_t handle); /* * bind or unbind a set of events to/from the event handle */ int ndi_event_bind_set(ndi_event_hdl_t handle, ndi_event_set_t *ndi_event_set, uint_t flag); int ndi_event_unbind_set(ndi_event_hdl_t handle, ndi_event_set_t *ndi_event_set, uint_t flag); /* * get an event cookie */ int ndi_event_retrieve_cookie(ndi_event_hdl_t handle, dev_info_t *child_dip, char *eventname, ddi_eventcookie_t *cookiep, uint_t flag); /* * add an event callback info to the ndi event handle */ int ndi_event_add_callback(ndi_event_hdl_t handle, dev_info_t *child_dip, ddi_eventcookie_t cookie, void (*event_callback) (dev_info_t *, ddi_eventcookie_t, void *arg, void *impldata), void *arg, uint_t flag, ddi_callback_id_t *cb_id); /* * remove an event callback registration from the ndi event handle */ int ndi_event_remove_callback(ndi_event_hdl_t handle, ddi_callback_id_t id); /* * perform callbacks for a specified cookie */ int ndi_event_run_callbacks(ndi_event_hdl_t handle, dev_info_t *child_dip, ddi_eventcookie_t cookie, void *bus_impldata); /* * do callback for just one child_dip, regardless of attributes */ int ndi_event_do_callback(ndi_event_hdl_t handle, dev_info_t *child_dip, ddi_eventcookie_t cookie, void *bus_impldata); /* * ndi_event_tag_to_cookie: utility function to find an event cookie * given an event tag */ ddi_eventcookie_t ndi_event_tag_to_cookie(ndi_event_hdl_t handle, int event_tag); /* * ndi_event_cookie_to_tag: utility function to find an event tag * given an event_cookie */ int ndi_event_cookie_to_tag(ndi_event_hdl_t handle, ddi_eventcookie_t cookie); /* * ndi_event_cookie_to_name: utility function to find an event * name given an event_cookie */ char * ndi_event_cookie_to_name(ndi_event_hdl_t handle, ddi_eventcookie_t cookie); /* * ndi_event_tag_to_name: utility function to find an event * name given an event_tag */ char * ndi_event_tag_to_name(ndi_event_hdl_t handle, int event_tag); dev_info_t * ndi_devi_config_vhci(char *, int); #ifdef DEBUG /* * ndi_event_dump_hdl: debug functionality used to display event handle */ void ndi_event_dump_hdl(struct ndi_event_hdl *hdl, char *location); #endif /* * Default busop bus_config helper functions */ int ndi_busop_bus_config(dev_info_t *pdip, uint_t flags, ddi_bus_config_op_t op, void *arg, dev_info_t **child, clock_t reset_delay); int ndi_busop_bus_unconfig(dev_info_t *dip, uint_t flags, ddi_bus_config_op_t op, void *arg); /* * Called by the Nexus/HPC drivers to register, unregister and interact * with the hotplug framework for the specified hotplug connection. */ int ndi_hp_register(dev_info_t *dip, ddi_hp_cn_info_t *info_p); int ndi_hp_unregister(dev_info_t *dip, char *cn_name); int ndi_hp_state_change_req(dev_info_t *dip, char *cn_name, ddi_hp_cn_state_t state, uint_t flag); void ndi_hp_walk_cn(dev_info_t *dip, int (*f)(ddi_hp_cn_info_t *, void *), void *arg); /* * Bus Resource allocation structures and function prototypes exported * by busra module */ /* structure for specifying a request */ typedef struct ndi_ra_request { uint_t ra_flags; /* General flags */ /* see bit definitions below */ uint64_t ra_len; /* Requested allocation length */ uint64_t ra_addr; /* Specific base address requested */ uint64_t ra_boundbase; /* Base address of the area for */ /* the allocated resource to be */ /* restricted to */ uint64_t ra_boundlen; /* Length of the area, starting */ /* from ra_boundbase, for the */ /* allocated resource to be */ /* restricted to. */ uint64_t ra_align_mask; /* Alignment mask used for */ /* allocated base address */ } ndi_ra_request_t; /* ra_flags bit definitions */ #define NDI_RA_ALIGN_SIZE 0x0001 /* Set the alignment of the */ /* allocated resource address */ /* according to the ra_len */ /* value (alignment mask will */ /* be (ra_len - 1)). Value of */ /* ra_len has to be power of 2. */ /* If this flag is set, value of */ /* ra_align_mask will be ignored. */ #define NDI_RA_ALLOC_BOUNDED 0x0002 /* Indicates that the resource */ /* should be restricted to the */ /* area specified by ra_boundbase */ /* and ra_boundlen */ #define NDI_RA_ALLOC_SPECIFIED 0x0004 /* Indicates that a specific */ /* address (ra_addr value) is */ /* requested. */ #define NDI_RA_ALLOC_PARTIAL_OK 0x0008 /* Indicates if requested size */ /* (ra_len) chunk is not available */ /* then allocate as big chunk as */ /* possible which is less than or */ /* equal to ra_len size. */ /* return values specific to bus resource allocator */ #define NDI_RA_PARTIAL_REQ -7 /* Predefined types for generic type of resources */ #define NDI_RA_TYPE_MEM "memory" #define NDI_RA_TYPE_IO "io" #define NDI_RA_TYPE_PCI_BUSNUM "pci_bus_number" #define NDI_RA_TYPE_PCI_PREFETCH_MEM "pci_prefetchable_memory" #define NDI_RA_TYPE_INTR "interrupt" /* flag bit definition */ #define NDI_RA_PASS 0x0001 /* pass request up the dev tree */ /* * Prototype definitions for functions exported */ int ndi_ra_map_setup(dev_info_t *dip, char *type); int ndi_ra_map_destroy(dev_info_t *dip, char *type); int ndi_ra_alloc(dev_info_t *dip, ndi_ra_request_t *req, uint64_t *basep, uint64_t *lenp, char *type, uint_t flag); int ndi_ra_free(dev_info_t *dip, uint64_t base, uint64_t len, char *type, uint_t flag); /* * ndi_dev_is_prom_node: Return non-zero if the node is a prom node */ int ndi_dev_is_prom_node(dev_info_t *); /* * ndi_dev_is_pseudo_node: Return non-zero if the node is a pseudo node. * NB: all non-prom nodes are pseudo nodes. * c.f. ndi_dev_is_persistent_node */ int ndi_dev_is_pseudo_node(dev_info_t *); /* * ndi_dev_is_persistent_node: Return non-zero if the node has the * property of persistence. */ int ndi_dev_is_persistent_node(dev_info_t *); /* * ndi_dev_is_hotplug_node: Return non-zero if the node was created by hotplug. */ int ndi_dev_is_hotplug_node(dev_info_t *); /* * ndi_dev_is_hidden_node: Return non-zero if the node is hidden. */ int ndi_dev_is_hidden_node(dev_info_t *); /* * ndi_devi_set_hidden: mark a node as hidden * ndi_devi_clr_hidden: mark a node as visible */ void ndi_devi_set_hidden(dev_info_t *); void ndi_devi_clr_hidden(dev_info_t *); /* * Event posted when a fault is reported */ #define DDI_DEVI_FAULT_EVENT "DDI:DEVI_FAULT" struct ddi_fault_event_data { dev_info_t *f_dip; ddi_fault_impact_t f_impact; ddi_fault_location_t f_location; const char *f_message; ddi_devstate_t f_oldstate; }; /* * Access handle/DMA handle fault flag setting/clearing functions for nexi */ void ndi_set_acc_fault(ddi_acc_handle_t ah); void ndi_clr_acc_fault(ddi_acc_handle_t ah); void ndi_set_dma_fault(ddi_dma_handle_t dh); void ndi_clr_dma_fault(ddi_dma_handle_t dh); /* Driver.conf property merging */ int ndi_merge_node(dev_info_t *, int (*)(dev_info_t *, char *, int)); void ndi_merge_wildcard_node(dev_info_t *); /* * Ndi 'flavor' support: These interfaces are to support a nexus driver * with multiple 'flavors' of children (devi_flavor of child), coupled * with a child flavor-specifc private data mechanism (via devi_flavor_v * of parent). This is provided as an extension to ddi_[sg]et_driver_private, * where the vanilla 'flavor' is what is stored or retrieved via * ddi_[sg]et_driver_private. * * Flavors are indexed with a small integer. The first flavor, flavor * zero, is always present and reserved as the 'vanilla' flavor. * Space for extra flavors can be allocated and private pointers * with respect to each flavor set and retrieved. * * NOTE:For a nexus driver, if the need to support multiple flavors of * children is understood from the begining, then a private 'flavor' * mechanism can be implemented via ddi_[sg]et_driver_private. * * With SCSA, the need to support multiple flavors of children was not * anticipated, and ddi_get_driver_private(9F) of an initiator port * devinfo node was publicly defined in the DDI to return a * scsi_device(9S) child-flavor specific value: a pointer to * scsi_hba_tran(9S). Over the years, each time the need to support * a new flavor of child has occurred, a new form of overload/kludge * has been devised. The ndi 'flavors' interfaces provide a simple way * to address this issue that can be used by both SCSA nexus support, * and by other nexus drivers. */ /* * Interfaces to maintain flavor-specific private data for children of self */ #define NDI_FLAVOR_VANILLA 0 void ndi_flavorv_alloc(dev_info_t *self, int nflavors); void ndi_flavorv_set(dev_info_t *self, ndi_flavor_t child_flavor, void *); void *ndi_flavorv_get(dev_info_t *self, ndi_flavor_t child_flavor); /* Interfaces for 'self' nexus driver to get/set flavor of child */ void ndi_flavor_set(dev_info_t *child, ndi_flavor_t child_flavor); ndi_flavor_t ndi_flavor_get(dev_info_t *child); #endif /* _KERNEL */ #ifdef __cplusplus } #endif #endif /* _SYS_SUNNDI_H */