261 lines
11 KiB
C
261 lines
11 KiB
C
/*
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* Copyright (c) 2016-2022 Apple Inc. All rights reserved.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. The rights granted to you under the License
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* may not be used to create, or enable the creation or redistribution of,
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* unlawful or unlicensed copies of an Apple operating system, or to
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* circumvent, violate, or enable the circumvention or violation of, any
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* terms of an Apple operating system software license agreement.
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*
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* Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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*/
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#ifndef _SKYWALK_PACKET_PBUFPOOLVAR_H_
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#define _SKYWALK_PACKET_PBUFPOOLVAR_H_
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#ifdef BSD_KERNEL_PRIVATE
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#include <skywalk/core/skywalk_var.h>
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struct __kern_quantum;
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struct __kern_packet;
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/*
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* User packet pool hash bucket. Packets allocated by user space are
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* kept in the hash table. This allows the kernel to validate whether
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* or not a given packet object is valid or is already-freed, and thus
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* take the appropriate measure during internalize.
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*/
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struct kern_pbufpool_u_bkt {
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SLIST_HEAD(, __kern_quantum) upp_head;
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};
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struct kern_pbufpool_u_bft_bkt {
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SLIST_HEAD(, __kern_buflet_ext) upp_head;
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};
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#define PBUFPOOL_MAX_BUF_REGIONS 2
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#define PBUFPOOL_BUF_IDX_DEF 0
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#define PBUFPOOL_BUF_IDX_LARGE 1
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struct kern_pbufpool {
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decl_lck_mtx_data(, pp_lock);
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uint32_t pp_refcnt;
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uint32_t pp_flags;
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uint32_t pp_buf_obj_size[PBUFPOOL_MAX_BUF_REGIONS];
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uint32_t pp_buf_size[PBUFPOOL_MAX_BUF_REGIONS];
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uint16_t pp_max_frags;
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/*
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* Caches
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*/
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struct skmem_cache *pp_buf_cache[PBUFPOOL_MAX_BUF_REGIONS];
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struct skmem_cache *pp_kmd_cache;
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struct skmem_cache *pp_kbft_cache[PBUFPOOL_MAX_BUF_REGIONS];
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/*
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* Regions
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*/
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struct skmem_region *pp_buf_region[PBUFPOOL_MAX_BUF_REGIONS];
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struct skmem_region *pp_kmd_region;
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struct skmem_region *pp_umd_region;
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struct skmem_region *pp_ubft_region;
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struct skmem_region *pp_kbft_region;
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/*
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* User packet pool: packet metadata hash table
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*/
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struct kern_pbufpool_u_bkt *pp_u_hash_table;
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uint64_t pp_u_bufinuse;
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/*
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* User packet pool: buflet hash table
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*/
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struct kern_pbufpool_u_bft_bkt *pp_u_bft_hash_table;
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uint64_t pp_u_bftinuse;
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void *pp_ctx;
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pbuf_ctx_retain_fn_t pp_ctx_retain;
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pbuf_ctx_release_fn_t pp_ctx_release;
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nexus_meta_type_t pp_md_type;
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nexus_meta_subtype_t pp_md_subtype;
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uint32_t pp_midx_start;
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uint32_t pp_bidx_start;
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pbufpool_name_t pp_name;
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pbuf_seg_ctor_fn_t pp_pbuf_seg_ctor;
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pbuf_seg_dtor_fn_t pp_pbuf_seg_dtor;
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};
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/* valid values for pp_flags */
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#define PPF_EXTERNAL 0x1 /* externally configured */
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#define PPF_CLOSED 0x2 /* closed; awaiting final destruction */
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#define PPF_MONOLITHIC 0x4 /* non slab-based buffer region */
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/* buflet is truncated and may not contain the full payload */
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#define PPF_TRUNCATED_BUF 0x8
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#define PPF_KERNEL 0x10 /* kernel only, no user region(s) */
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#define PPF_BUFFER_ON_DEMAND 0x20 /* attach buffers to packet on demand */
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#define PPF_BATCH 0x40 /* capable of batch alloc/free */
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#define PPF_DYNAMIC 0x80 /* capable of magazine resizing */
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#define PPF_LARGE_BUF 0x100 /* configured with large buffers */
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#define PP_KERNEL_ONLY(_pp) \
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(((_pp)->pp_flags & PPF_KERNEL) != 0)
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#define PP_HAS_TRUNCATED_BUF(_pp) \
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(((_pp)->pp_flags & PPF_TRUNCATED_BUF) != 0)
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#define PP_HAS_BUFFER_ON_DEMAND(_pp) \
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(((_pp)->pp_flags & PPF_BUFFER_ON_DEMAND) != 0)
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#define PP_BATCH_CAPABLE(_pp) \
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(((_pp)->pp_flags & PPF_BATCH) != 0)
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#define PP_DYNAMIC(_pp) \
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(((_pp)->pp_flags & PPF_DYNAMIC) != 0)
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#define PP_HAS_LARGE_BUF(_pp) \
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(((_pp)->pp_flags & PPF_LARGE_BUF) != 0)
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#define PP_LOCK(_pp) \
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lck_mtx_lock(&_pp->pp_lock)
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#define PP_LOCK_ASSERT_HELD(_pp) \
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LCK_MTX_ASSERT(&_pp->pp_lock, LCK_MTX_ASSERT_OWNED)
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#define PP_LOCK_ASSERT_NOTHELD(_pp) \
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LCK_MTX_ASSERT(&_pp->pp_lock, LCK_MTX_ASSERT_NOTOWNED)
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#define PP_UNLOCK(_pp) \
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lck_mtx_unlock(&_pp->pp_lock)
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#define PP_BUF_SIZE_DEF(_pp) ((_pp)->pp_buf_size[PBUFPOOL_BUF_IDX_DEF])
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#define PP_BUF_SIZE_LARGE(_pp) ((_pp)->pp_buf_size[PBUFPOOL_BUF_IDX_LARGE])
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#define PP_BUF_OBJ_SIZE_DEF(_pp) \
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((_pp)->pp_buf_obj_size[PBUFPOOL_BUF_IDX_DEF])
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#define PP_BUF_OBJ_SIZE_LARGE(_pp) \
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((_pp)->pp_buf_obj_size[PBUFPOOL_BUF_IDX_LARGE])
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#define PP_BUF_REGION_DEF(_pp) ((_pp)->pp_buf_region[PBUFPOOL_BUF_IDX_DEF])
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#define PP_BUF_REGION_LARGE(_pp) ((_pp)->pp_buf_region[PBUFPOOL_BUF_IDX_LARGE])
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#define PP_BUF_CACHE_DEF(_pp) ((_pp)->pp_buf_cache[PBUFPOOL_BUF_IDX_DEF])
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#define PP_BUF_CACHE_LARGE(_pp) ((_pp)->pp_buf_cache[PBUFPOOL_BUF_IDX_LARGE])
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#define PP_KBFT_CACHE_DEF(_pp) ((_pp)->pp_kbft_cache[PBUFPOOL_BUF_IDX_DEF])
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#define PP_KBFT_CACHE_LARGE(_pp) ((_pp)->pp_kbft_cache[PBUFPOOL_BUF_IDX_LARGE])
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__BEGIN_DECLS
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extern int pp_init(void);
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extern void pp_fini(void);
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extern void pp_close(struct kern_pbufpool *);
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/* create flags for pp_create() */
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#define PPCREATEF_EXTERNAL 0x1 /* externally requested */
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#define PPCREATEF_KERNEL_ONLY 0x2 /* kernel-only */
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#define PPCREATEF_TRUNCATED_BUF 0x4 /* compat-only (buf is short) */
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#define PPCREATEF_ONDEMAND_BUF 0x8 /* buf alloc/free is decoupled */
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#define PPCREATEF_DYNAMIC 0x10 /* dynamic per-CPU magazines */
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extern struct kern_pbufpool *pp_create(const char *name,
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struct skmem_region_params *srp_array, pbuf_seg_ctor_fn_t buf_seg_ctor,
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pbuf_seg_dtor_fn_t buf_seg_dtor, const void *ctx,
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pbuf_ctx_retain_fn_t ctx_retain, pbuf_ctx_release_fn_t ctx_release,
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uint32_t ppcreatef);
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extern void pp_destroy(struct kern_pbufpool *);
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extern int pp_init_upp(struct kern_pbufpool *, boolean_t);
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extern void pp_insert_upp(struct kern_pbufpool *, struct __kern_quantum *,
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pid_t);
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extern void pp_insert_upp_locked(struct kern_pbufpool *,
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struct __kern_quantum *, pid_t);
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extern void pp_insert_upp_batch(struct kern_pbufpool *pp, pid_t pid,
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uint64_t *array, uint32_t num);
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extern struct __kern_quantum *pp_remove_upp(struct kern_pbufpool *, obj_idx_t,
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int *);
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extern struct __kern_quantum *pp_remove_upp_locked(struct kern_pbufpool *,
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obj_idx_t, int *);
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extern struct __kern_quantum *pp_find_upp(struct kern_pbufpool *, obj_idx_t);
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extern void pp_purge_upp(struct kern_pbufpool *, pid_t);
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extern struct __kern_buflet *pp_remove_upp_bft(struct kern_pbufpool *,
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obj_idx_t, int *);
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extern void pp_insert_upp_bft(struct kern_pbufpool *, struct __kern_buflet *,
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pid_t);
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extern boolean_t pp_isempty_upp(struct kern_pbufpool *);
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extern void pp_retain_locked(struct kern_pbufpool *);
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extern void pp_retain(struct kern_pbufpool *);
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extern boolean_t pp_release_locked(struct kern_pbufpool *);
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extern boolean_t pp_release(struct kern_pbufpool *);
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/* flags for pp_regions_params_adjust() */
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/* configure packet pool regions for RX only */
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#define PP_REGION_CONFIG_BUF_IODIR_IN 0x00000001
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/* configure packet pool regions for TX only */
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#define PP_REGION_CONFIG_BUF_IODIR_OUT 0x00000002
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/* configure packet pool regions for bidirectional operation */
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#define PP_REGION_CONFIG_BUF_IODIR_BIDIR \
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(PP_REGION_CONFIG_BUF_IODIR_IN | PP_REGION_CONFIG_BUF_IODIR_OUT)
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/* configure packet pool metadata regions as persistent (wired) */
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#define PP_REGION_CONFIG_MD_PERSISTENT 0x00000004
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/* configure packet pool buffer regions as persistent (wired) */
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#define PP_REGION_CONFIG_BUF_PERSISTENT 0x00000008
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/* Enable magazine layer (per-cpu caches) for packet pool metadata regions */
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#define PP_REGION_CONFIG_MD_MAGAZINE_ENABLE 0x00000010
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/* configure packet pool regions required for kernel-only operations */
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#define PP_REGION_CONFIG_KERNEL_ONLY 0x00000020
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/* configure packet pool buflet regions */
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#define PP_REGION_CONFIG_BUFLET 0x00000040
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/* configure packet pool buffer region as user read-only */
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#define PP_REGION_CONFIG_BUF_UREADONLY 0x00000080
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/* configure packet pool buffer region as kernel read-only */
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#define PP_REGION_CONFIG_BUF_KREADONLY 0x00000100
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/* configure packet pool buffer region as a single segment */
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#define PP_REGION_CONFIG_BUF_MONOLITHIC 0x00000200
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/* configure packet pool buffer region as physically contiguous segment */
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#define PP_REGION_CONFIG_BUF_SEGPHYSCONTIG 0x00000400
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/* configure packet pool buffer region as cache-inhibiting */
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#define PP_REGION_CONFIG_BUF_NOCACHE 0x00000800
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/* configure packet pool buffer region (backing IOMD) as thread safe */
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#define PP_REGION_CONFIG_BUF_THREADSAFE 0x00002000
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extern void pp_regions_params_adjust(struct skmem_region_params *,
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nexus_meta_type_t, nexus_meta_subtype_t, uint32_t, uint16_t, uint32_t,
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uint32_t, uint32_t, uint32_t, uint32_t);
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extern uint64_t pp_alloc_packet(struct kern_pbufpool *, uint16_t, uint32_t);
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extern uint64_t pp_alloc_packet_by_size(struct kern_pbufpool *, uint32_t,
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uint32_t);
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extern int pp_alloc_packet_batch(struct kern_pbufpool *, uint16_t, uint64_t *,
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uint32_t *, boolean_t, alloc_cb_func_t, const void *, uint32_t);
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extern int pp_alloc_pktq(struct kern_pbufpool *, uint16_t, struct pktq *,
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uint32_t, alloc_cb_func_t, const void *, uint32_t);
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extern void pp_free_packet(struct kern_pbufpool *, uint64_t);
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extern void pp_free_packet_batch(struct kern_pbufpool *, uint64_t *, uint32_t);
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extern void pp_free_packet_single(struct __kern_packet *);
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extern void pp_free_packet_chain(struct __kern_packet *, int *);
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extern void pp_free_pktq(struct pktq *);
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extern errno_t pp_alloc_buffer(const kern_pbufpool_t, mach_vm_address_t *,
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kern_segment_t *, kern_obj_idx_seg_t *, uint32_t);
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extern void pp_free_buffer(const kern_pbufpool_t, mach_vm_address_t);
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extern errno_t pp_alloc_buflet(struct kern_pbufpool *pp, kern_buflet_t *kbft,
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uint32_t skmflag, bool large);
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extern errno_t pp_alloc_buflet_batch(struct kern_pbufpool *pp, uint64_t *array,
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uint32_t *size, uint32_t skmflag, bool large);
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extern void pp_free_buflet(const kern_pbufpool_t, kern_buflet_t);
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extern void pp_reap_caches(boolean_t);
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__END_DECLS
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#endif /* BSD_KERNEL_PRIVATE */
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#endif /* !_SKYWALK_PACKET_PBUFPOOLVAR_H_ */
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