diff options
Diffstat (limited to 'sys/contrib/openzfs/module/icp/include/sys/crypto/sched_impl.h')
-rw-r--r-- | sys/contrib/openzfs/module/icp/include/sys/crypto/sched_impl.h | 531 |
1 files changed, 531 insertions, 0 deletions
diff --git a/sys/contrib/openzfs/module/icp/include/sys/crypto/sched_impl.h b/sys/contrib/openzfs/module/icp/include/sys/crypto/sched_impl.h new file mode 100644 index 000000000000..85ea0ba1d092 --- /dev/null +++ b/sys/contrib/openzfs/module/icp/include/sys/crypto/sched_impl.h @@ -0,0 +1,531 @@ +/* + * 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 2007 Sun Microsystems, Inc. All rights reserved. + * Use is subject to license terms. + */ + +#ifndef _SYS_CRYPTO_SCHED_IMPL_H +#define _SYS_CRYPTO_SCHED_IMPL_H + +/* + * Scheduler internal structures. + */ + +#ifdef __cplusplus +extern "C" { +#endif + +#include <sys/zfs_context.h> +#include <sys/crypto/api.h> +#include <sys/crypto/spi.h> +#include <sys/crypto/impl.h> +#include <sys/crypto/common.h> +#include <sys/crypto/ops_impl.h> + +typedef void (kcf_func_t)(void *, int); + +typedef enum kcf_req_status { + REQ_ALLOCATED = 1, + REQ_WAITING, /* At the framework level */ + REQ_INPROGRESS, /* At the provider level */ + REQ_DONE, + REQ_CANCELED +} kcf_req_status_t; + +typedef enum kcf_call_type { + CRYPTO_SYNCH = 1, + CRYPTO_ASYNCH +} kcf_call_type_t; + +#define CHECK_RESTRICT(crq) (crq != NULL && \ + ((crq)->cr_flag & CRYPTO_RESTRICTED)) + +#define CHECK_RESTRICT_FALSE B_FALSE + +#define CHECK_FASTPATH(crq, pd) ((crq) == NULL || \ + !((crq)->cr_flag & CRYPTO_ALWAYS_QUEUE)) && \ + (pd)->pd_prov_type == CRYPTO_SW_PROVIDER + +#define KCF_KMFLAG(crq) (((crq) == NULL) ? KM_SLEEP : KM_NOSLEEP) + +/* + * The framework keeps an internal handle to use in the adaptive + * asynchronous case. This is the case when a client has the + * CRYPTO_ALWAYS_QUEUE bit clear and a software provider is used for + * the request. The request is completed in the context of the calling + * thread and kernel memory must be allocated with KM_NOSLEEP. + * + * The framework passes a pointer to the handle in crypto_req_handle_t + * argument when it calls the SPI of the software provider. The macros + * KCF_RHNDL() and KCF_SWFP_RHNDL() are used to do this. + * + * When a provider asks the framework for kmflag value via + * crypto_kmflag(9S) we use REQHNDL2_KMFLAG() macro. + */ +extern ulong_t kcf_swprov_hndl; +#define KCF_RHNDL(kmflag) (((kmflag) == KM_SLEEP) ? NULL : &kcf_swprov_hndl) +#define KCF_SWFP_RHNDL(crq) (((crq) == NULL) ? NULL : &kcf_swprov_hndl) +#define REQHNDL2_KMFLAG(rhndl) \ + ((rhndl == &kcf_swprov_hndl) ? KM_NOSLEEP : KM_SLEEP) + +/* Internal call_req flags. They start after the public ones in api.h */ + +#define CRYPTO_SETDUAL 0x00001000 /* Set the 'cont' boolean before */ + /* submitting the request */ +#define KCF_ISDUALREQ(crq) \ + (((crq) == NULL) ? B_FALSE : (crq->cr_flag & CRYPTO_SETDUAL)) + +typedef struct kcf_prov_tried { + kcf_provider_desc_t *pt_pd; + struct kcf_prov_tried *pt_next; +} kcf_prov_tried_t; + +#define IS_FG_SUPPORTED(mdesc, fg) \ + (((mdesc)->pm_mech_info.cm_func_group_mask & (fg)) != 0) + +#define IS_PROVIDER_TRIED(pd, tlist) \ + (tlist != NULL && is_in_triedlist(pd, tlist)) + +#define IS_RECOVERABLE(error) \ + (error == CRYPTO_BUFFER_TOO_BIG || \ + error == CRYPTO_BUSY || \ + error == CRYPTO_DEVICE_ERROR || \ + error == CRYPTO_DEVICE_MEMORY || \ + error == CRYPTO_KEY_SIZE_RANGE || \ + error == CRYPTO_NO_PERMISSION) + +#define KCF_ATOMIC_INCR(x) atomic_add_32(&(x), 1) +#define KCF_ATOMIC_DECR(x) atomic_add_32(&(x), -1) + +/* + * Node structure for synchronous requests. + */ +typedef struct kcf_sreq_node { + /* Should always be the first field in this structure */ + kcf_call_type_t sn_type; + /* + * sn_cv and sr_lock are used to wait for the + * operation to complete. sn_lock also protects + * the sn_state field. + */ + kcondvar_t sn_cv; + kmutex_t sn_lock; + kcf_req_status_t sn_state; + + /* + * Return value from the operation. This will be + * one of the CRYPTO_* errors defined in common.h. + */ + int sn_rv; + + /* + * parameters to call the SPI with. This can be + * a pointer as we know the caller context/stack stays. + */ + struct kcf_req_params *sn_params; + + /* Internal context for this request */ + struct kcf_context *sn_context; + + /* Provider handling this request */ + kcf_provider_desc_t *sn_provider; +} kcf_sreq_node_t; + +/* + * Node structure for asynchronous requests. A node can be on + * on a chain of requests hanging of the internal context + * structure and can be in the global software provider queue. + */ +typedef struct kcf_areq_node { + /* Should always be the first field in this structure */ + kcf_call_type_t an_type; + + /* an_lock protects the field an_state */ + kmutex_t an_lock; + kcf_req_status_t an_state; + crypto_call_req_t an_reqarg; + + /* + * parameters to call the SPI with. We need to + * save the params since the caller stack can go away. + */ + struct kcf_req_params an_params; + + /* + * The next two fields should be NULL for operations that + * don't need a context. + */ + /* Internal context for this request */ + struct kcf_context *an_context; + + /* next in chain of requests for context */ + struct kcf_areq_node *an_ctxchain_next; + + kcondvar_t an_turn_cv; + boolean_t an_is_my_turn; + boolean_t an_isdual; /* for internal reuse */ + + /* + * Next and previous nodes in the global software + * queue. These fields are NULL for a hardware + * provider since we use a taskq there. + */ + struct kcf_areq_node *an_next; + struct kcf_areq_node *an_prev; + + /* Provider handling this request */ + kcf_provider_desc_t *an_provider; + kcf_prov_tried_t *an_tried_plist; + + struct kcf_areq_node *an_idnext; /* Next in ID hash */ + struct kcf_areq_node *an_idprev; /* Prev in ID hash */ + kcondvar_t an_done; /* Signal request completion */ + uint_t an_refcnt; +} kcf_areq_node_t; + +#define KCF_AREQ_REFHOLD(areq) { \ + atomic_add_32(&(areq)->an_refcnt, 1); \ + ASSERT((areq)->an_refcnt != 0); \ +} + +#define KCF_AREQ_REFRELE(areq) { \ + ASSERT((areq)->an_refcnt != 0); \ + membar_exit(); \ + if (atomic_add_32_nv(&(areq)->an_refcnt, -1) == 0) \ + kcf_free_req(areq); \ +} + +#define GET_REQ_TYPE(arg) *((kcf_call_type_t *)(arg)) + +#define NOTIFY_CLIENT(areq, err) (*(areq)->an_reqarg.cr_callback_func)(\ + (areq)->an_reqarg.cr_callback_arg, err); + +/* For internally generated call requests for dual operations */ +typedef struct kcf_call_req { + crypto_call_req_t kr_callreq; /* external client call req */ + kcf_req_params_t kr_params; /* Params saved for next call */ + kcf_areq_node_t *kr_areq; /* Use this areq */ + off_t kr_saveoffset; + size_t kr_savelen; +} kcf_dual_req_t; + +/* + * The following are some what similar to macros in callo.h, which implement + * callout tables. + * + * The lower four bits of the ID are used to encode the table ID to + * index in to. The REQID_COUNTER_HIGH bit is used to avoid any check for + * wrap around when generating ID. We assume that there won't be a request + * which takes more time than 2^^(sizeof (long) - 5) other requests submitted + * after it. This ensures there won't be any ID collision. + */ +#define REQID_COUNTER_HIGH (1UL << (8 * sizeof (long) - 1)) +#define REQID_COUNTER_SHIFT 4 +#define REQID_COUNTER_LOW (1 << REQID_COUNTER_SHIFT) +#define REQID_TABLES 16 +#define REQID_TABLE_MASK (REQID_TABLES - 1) + +#define REQID_BUCKETS 512 +#define REQID_BUCKET_MASK (REQID_BUCKETS - 1) +#define REQID_HASH(id) (((id) >> REQID_COUNTER_SHIFT) & REQID_BUCKET_MASK) + +#define GET_REQID(areq) (areq)->an_reqarg.cr_reqid +#define SET_REQID(areq, val) GET_REQID(areq) = val + +/* + * Hash table for async requests. + */ +typedef struct kcf_reqid_table { + kmutex_t rt_lock; + crypto_req_id_t rt_curid; + kcf_areq_node_t *rt_idhash[REQID_BUCKETS]; +} kcf_reqid_table_t; + +/* + * Global software provider queue structure. Requests to be + * handled by a SW provider and have the ALWAYS_QUEUE flag set + * get queued here. + */ +typedef struct kcf_global_swq { + /* + * gs_cv and gs_lock are used to wait for new requests. + * gs_lock protects the changes to the queue. + */ + kcondvar_t gs_cv; + kmutex_t gs_lock; + uint_t gs_njobs; + uint_t gs_maxjobs; + kcf_areq_node_t *gs_first; + kcf_areq_node_t *gs_last; +} kcf_global_swq_t; + + +/* + * Internal representation of a canonical context. We contain crypto_ctx_t + * structure in order to have just one memory allocation. The SPI + * ((crypto_ctx_t *)ctx)->cc_framework_private maps to this structure. + */ +typedef struct kcf_context { + crypto_ctx_t kc_glbl_ctx; + uint_t kc_refcnt; + kmutex_t kc_in_use_lock; + /* + * kc_req_chain_first and kc_req_chain_last are used to chain + * multiple async requests using the same context. They should be + * NULL for sync requests. + */ + kcf_areq_node_t *kc_req_chain_first; + kcf_areq_node_t *kc_req_chain_last; + kcf_provider_desc_t *kc_prov_desc; /* Prov. descriptor */ + kcf_provider_desc_t *kc_sw_prov_desc; /* Prov. descriptor */ + kcf_mech_entry_t *kc_mech; + struct kcf_context *kc_secondctx; /* for dual contexts */ +} kcf_context_t; + +/* + * Bump up the reference count on the framework private context. A + * global context or a request that references this structure should + * do a hold. + */ +#define KCF_CONTEXT_REFHOLD(ictx) { \ + atomic_add_32(&(ictx)->kc_refcnt, 1); \ + ASSERT((ictx)->kc_refcnt != 0); \ +} + +/* + * Decrement the reference count on the framework private context. + * When the last reference is released, the framework private + * context structure is freed along with the global context. + */ +#define KCF_CONTEXT_REFRELE(ictx) { \ + ASSERT((ictx)->kc_refcnt != 0); \ + membar_exit(); \ + if (atomic_add_32_nv(&(ictx)->kc_refcnt, -1) == 0) \ + kcf_free_context(ictx); \ +} + +/* + * Check if we can release the context now. In case of CRYPTO_QUEUED + * we do not release it as we can do it only after the provider notified + * us. In case of CRYPTO_BUSY, the client can retry the request using + * the context, so we do not release the context. + * + * This macro should be called only from the final routine in + * an init/update/final sequence. We do not release the context in case + * of update operations. We require the consumer to free it + * explicitly, in case it wants to abandon the operation. This is done + * as there may be mechanisms in ECB mode that can continue even if + * an operation on a block fails. + */ +#define KCF_CONTEXT_COND_RELEASE(rv, kcf_ctx) { \ + if (KCF_CONTEXT_DONE(rv)) \ + KCF_CONTEXT_REFRELE(kcf_ctx); \ +} + +/* + * This macro determines whether we're done with a context. + */ +#define KCF_CONTEXT_DONE(rv) \ + ((rv) != CRYPTO_QUEUED && (rv) != CRYPTO_BUSY && \ + (rv) != CRYPTO_BUFFER_TOO_SMALL) + +/* + * A crypto_ctx_template_t is internally a pointer to this struct + */ +typedef struct kcf_ctx_template { + crypto_kcf_provider_handle_t ct_prov_handle; /* provider handle */ + uint_t ct_generation; /* generation # */ + size_t ct_size; /* for freeing */ + crypto_spi_ctx_template_t ct_prov_tmpl; /* context template */ + /* from the SW prov */ +} kcf_ctx_template_t; + +/* + * Structure for pool of threads working on global software queue. + */ +typedef struct kcf_pool { + uint32_t kp_threads; /* Number of threads in pool */ + uint32_t kp_idlethreads; /* Idle threads in pool */ + uint32_t kp_blockedthreads; /* Blocked threads in pool */ + + /* + * cv & lock to monitor the condition when no threads + * are around. In this case the failover thread kicks in. + */ + kcondvar_t kp_nothr_cv; + kmutex_t kp_thread_lock; + + /* Userspace thread creator variables. */ + boolean_t kp_signal_create_thread; /* Create requested flag */ + int kp_nthrs; /* # of threads to create */ + boolean_t kp_user_waiting; /* Thread waiting for work */ + + /* + * cv & lock for the condition where more threads need to be + * created. kp_user_lock also protects the three fields above. + */ + kcondvar_t kp_user_cv; /* Creator cond. variable */ + kmutex_t kp_user_lock; /* Creator lock */ +} kcf_pool_t; + + +/* + * State of a crypto bufcall element. + */ +typedef enum cbuf_state { + CBUF_FREE = 1, + CBUF_WAITING, + CBUF_RUNNING +} cbuf_state_t; + +/* + * Structure of a crypto bufcall element. + */ +typedef struct kcf_cbuf_elem { + /* + * lock and cv to wait for CBUF_RUNNING to be done + * kc_lock also protects kc_state. + */ + kmutex_t kc_lock; + kcondvar_t kc_cv; + cbuf_state_t kc_state; + + struct kcf_cbuf_elem *kc_next; + struct kcf_cbuf_elem *kc_prev; + + void (*kc_func)(void *arg); + void *kc_arg; +} kcf_cbuf_elem_t; + +/* + * State of a notify element. + */ +typedef enum ntfy_elem_state { + NTFY_WAITING = 1, + NTFY_RUNNING +} ntfy_elem_state_t; + +/* + * Structure of a notify list element. + */ +typedef struct kcf_ntfy_elem { + /* + * lock and cv to wait for NTFY_RUNNING to be done. + * kn_lock also protects kn_state. + */ + kmutex_t kn_lock; + kcondvar_t kn_cv; + ntfy_elem_state_t kn_state; + + struct kcf_ntfy_elem *kn_next; + struct kcf_ntfy_elem *kn_prev; + + crypto_notify_callback_t kn_func; + uint32_t kn_event_mask; +} kcf_ntfy_elem_t; + + +/* + * The following values are based on the assumption that it would + * take around eight cpus to load a hardware provider (This is true for + * at least one product) and a kernel client may come from different + * low-priority interrupt levels. We will have CRYPTO_TASKQ_MIN number + * of cached taskq entries. The CRYPTO_TASKQ_MAX number is based on + * a throughput of 1GB/s using 512-byte buffers. These are just + * reasonable estimates and might need to change in future. + */ +#define CRYPTO_TASKQ_THREADS 8 +#define CRYPTO_TASKQ_MIN 64 +#define CRYPTO_TASKQ_MAX 2 * 1024 * 1024 + +extern int crypto_taskq_threads; +extern int crypto_taskq_minalloc; +extern int crypto_taskq_maxalloc; +extern kcf_global_swq_t *gswq; +extern int kcf_maxthreads; +extern int kcf_minthreads; + +/* + * All pending crypto bufcalls are put on a list. cbuf_list_lock + * protects changes to this list. + */ +extern kmutex_t cbuf_list_lock; +extern kcondvar_t cbuf_list_cv; + +/* + * All event subscribers are put on a list. kcf_notify_list_lock + * protects changes to this list. + */ +extern kmutex_t ntfy_list_lock; +extern kcondvar_t ntfy_list_cv; + +boolean_t kcf_get_next_logical_provider_member(kcf_provider_desc_t *, + kcf_provider_desc_t *, kcf_provider_desc_t **); +extern int kcf_get_hardware_provider(crypto_mech_type_t, crypto_mech_type_t, + boolean_t, kcf_provider_desc_t *, kcf_provider_desc_t **, + crypto_func_group_t); +extern int kcf_get_hardware_provider_nomech(offset_t, offset_t, + boolean_t, kcf_provider_desc_t *, kcf_provider_desc_t **); +extern void kcf_free_triedlist(kcf_prov_tried_t *); +extern kcf_prov_tried_t *kcf_insert_triedlist(kcf_prov_tried_t **, + kcf_provider_desc_t *, int); +extern kcf_provider_desc_t *kcf_get_mech_provider(crypto_mech_type_t, + kcf_mech_entry_t **, int *, kcf_prov_tried_t *, crypto_func_group_t, + boolean_t, size_t); +extern kcf_provider_desc_t *kcf_get_dual_provider(crypto_mechanism_t *, + crypto_mechanism_t *, kcf_mech_entry_t **, crypto_mech_type_t *, + crypto_mech_type_t *, int *, kcf_prov_tried_t *, + crypto_func_group_t, crypto_func_group_t, boolean_t, size_t); +extern crypto_ctx_t *kcf_new_ctx(crypto_call_req_t *, kcf_provider_desc_t *, + crypto_session_id_t); +extern int kcf_submit_request(kcf_provider_desc_t *, crypto_ctx_t *, + crypto_call_req_t *, kcf_req_params_t *, boolean_t); +extern void kcf_sched_destroy(void); +extern void kcf_sched_init(void); +extern void kcf_sched_start(void); +extern void kcf_sop_done(kcf_sreq_node_t *, int); +extern void kcf_aop_done(kcf_areq_node_t *, int); +extern int common_submit_request(kcf_provider_desc_t *, + crypto_ctx_t *, kcf_req_params_t *, crypto_req_handle_t); +extern void kcf_free_context(kcf_context_t *); + +extern int kcf_svc_wait(int *); +extern int kcf_svc_do_run(void); +extern int kcf_need_signature_verification(kcf_provider_desc_t *); +extern void kcf_verify_signature(void *); +extern struct modctl *kcf_get_modctl(crypto_provider_info_t *); +extern void verify_unverified_providers(void); +extern void kcf_free_req(kcf_areq_node_t *areq); +extern void crypto_bufcall_service(void); + +extern void kcf_walk_ntfylist(uint32_t, void *); +extern void kcf_do_notify(kcf_provider_desc_t *, boolean_t); + +extern kcf_dual_req_t *kcf_alloc_req(crypto_call_req_t *); +extern void kcf_next_req(void *, int); +extern void kcf_last_req(void *, int); + +#ifdef __cplusplus +} +#endif + +#endif /* _SYS_CRYPTO_SCHED_IMPL_H */ |