718cf2ccb9
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
384 lines
9.2 KiB
C
384 lines
9.2 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (C) 2009-2012 Semihalf
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <sys/queue.h>
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#include <sys/fcntl.h>
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#include <sys/proc.h>
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#include <sys/namei.h>
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#include <sys/lock.h>
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#include <sys/vnode.h>
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#include <sys/mount.h>
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#include <dev/nand/nandsim_chip.h>
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#include <dev/nand/nandsim_swap.h>
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static int init_block_state(struct chip_swap *);
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static void destroy_block_state(struct chip_swap *);
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static int create_buffers(struct chip_swap *);
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static void destroy_buffers(struct chip_swap *);
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static int swap_file_open(struct chip_swap *, const char *);
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static void swap_file_close(struct chip_swap *);
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static int swap_file_write(struct chip_swap *, struct block_state *);
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static int swap_file_read(struct chip_swap *, struct block_state *);
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#define CHIP_SWAP_CMODE 0600
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#define CHIP_SWAP_BLOCKSPACES 2
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static int
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init_block_state(struct chip_swap *swap)
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{
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struct block_state *blk_state;
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int i;
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if (swap == NULL)
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return (-1);
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blk_state = malloc(swap->nof_blks * sizeof(struct block_state),
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M_NANDSIM, M_WAITOK | M_ZERO);
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for (i = 0; i < swap->nof_blks; i++)
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blk_state[i].offset = 0xffffffff;
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swap->blk_state = blk_state;
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return (0);
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}
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static void
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destroy_block_state(struct chip_swap *swap)
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{
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if (swap == NULL)
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return;
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if (swap->blk_state != NULL)
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free(swap->blk_state, M_NANDSIM);
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}
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static int
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create_buffers(struct chip_swap *swap)
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{
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struct block_space *block_space;
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void *block;
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int i;
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for (i = 0; i < CHIP_SWAP_BLOCKSPACES; i++) {
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block_space = malloc(sizeof(*block_space), M_NANDSIM, M_WAITOK);
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block = malloc(swap->blk_size, M_NANDSIM, M_WAITOK);
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block_space->blk_ptr = block;
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SLIST_INSERT_HEAD(&swap->free_bs, block_space, free_link);
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nand_debug(NDBG_SIM,"created blk_space %p[%p]\n", block_space,
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block);
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}
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if (i == 0)
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return (-1);
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return (0);
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}
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static void
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destroy_buffers(struct chip_swap *swap)
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{
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struct block_space *blk_space;
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if (swap == NULL)
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return;
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blk_space = SLIST_FIRST(&swap->free_bs);
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while (blk_space) {
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SLIST_REMOVE_HEAD(&swap->free_bs, free_link);
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nand_debug(NDBG_SIM,"destroyed blk_space %p[%p]\n",
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blk_space, blk_space->blk_ptr);
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free(blk_space->blk_ptr, M_NANDSIM);
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free(blk_space, M_NANDSIM);
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blk_space = SLIST_FIRST(&swap->free_bs);
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}
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blk_space = STAILQ_FIRST(&swap->used_bs);
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while (blk_space) {
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STAILQ_REMOVE_HEAD(&swap->used_bs, used_link);
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nand_debug(NDBG_SIM,"destroyed blk_space %p[%p]\n",
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blk_space, blk_space->blk_ptr);
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free(blk_space->blk_ptr, M_NANDSIM);
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free(blk_space, M_NANDSIM);
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blk_space = STAILQ_FIRST(&swap->used_bs);
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}
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}
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static int
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swap_file_open(struct chip_swap *swap, const char *swap_file)
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{
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struct nameidata nd;
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int flags, error;
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NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_SYSSPACE, swap_file,
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curthread);
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flags = FWRITE | FREAD | O_NOFOLLOW | O_CREAT | O_TRUNC;
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error = vn_open(&nd, &flags, CHIP_SWAP_CMODE, NULL);
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if (error) {
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nand_debug(NDBG_SIM,"Cannot create swap file %s", swap_file);
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NDFREE(&nd, NDF_ONLY_PNBUF);
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return (error);
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}
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swap->swap_cred = crhold(curthread->td_ucred);
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NDFREE(&nd, NDF_ONLY_PNBUF);
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/* We just unlock so we hold a reference */
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VOP_UNLOCK(nd.ni_vp, 0);
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swap->swap_vp = nd.ni_vp;
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return (0);
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}
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static void
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swap_file_close(struct chip_swap *swap)
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{
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if (swap == NULL)
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return;
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if (swap->swap_vp == NULL)
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return;
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vn_close(swap->swap_vp, FWRITE, swap->swap_cred, curthread);
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crfree(swap->swap_cred);
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}
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static int
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swap_file_write(struct chip_swap *swap, struct block_state *blk_state)
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{
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struct block_space *blk_space;
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struct thread *td;
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struct mount *mp;
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struct vnode *vp;
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struct uio auio;
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struct iovec aiov;
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if (swap == NULL || blk_state == NULL)
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return (-1);
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blk_space = blk_state->blk_sp;
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if (blk_state->offset == -1) {
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blk_state->offset = swap->swap_offset;
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swap->swap_offset += swap->blk_size;
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}
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nand_debug(NDBG_SIM,"saving %p[%p] at %x\n",
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blk_space, blk_space->blk_ptr, blk_state->offset);
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bzero(&aiov, sizeof(aiov));
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bzero(&auio, sizeof(auio));
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aiov.iov_base = blk_space->blk_ptr;
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aiov.iov_len = swap->blk_size;
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td = curthread;
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vp = swap->swap_vp;
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auio.uio_iov = &aiov;
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auio.uio_offset = blk_state->offset;
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auio.uio_segflg = UIO_SYSSPACE;
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auio.uio_rw = UIO_WRITE;
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auio.uio_iovcnt = 1;
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auio.uio_resid = swap->blk_size;
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auio.uio_td = td;
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vn_start_write(vp, &mp, V_WAIT);
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vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
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VOP_WRITE(vp, &auio, IO_UNIT, swap->swap_cred);
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VOP_UNLOCK(vp, 0);
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vn_finished_write(mp);
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return (0);
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}
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static int
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swap_file_read(struct chip_swap *swap, struct block_state *blk_state)
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{
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struct block_space *blk_space;
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struct thread *td;
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struct vnode *vp;
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struct uio auio;
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struct iovec aiov;
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if (swap == NULL || blk_state == NULL)
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return (-1);
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blk_space = blk_state->blk_sp;
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nand_debug(NDBG_SIM,"restore %p[%p] at %x\n",
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blk_space, blk_space->blk_ptr, blk_state->offset);
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bzero(&aiov, sizeof(aiov));
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bzero(&auio, sizeof(auio));
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aiov.iov_base = blk_space->blk_ptr;
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aiov.iov_len = swap->blk_size;
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td = curthread;
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vp = swap->swap_vp;
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auio.uio_iov = &aiov;
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auio.uio_offset = blk_state->offset;
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auio.uio_segflg = UIO_SYSSPACE;
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auio.uio_rw = UIO_READ;
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auio.uio_iovcnt = 1;
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auio.uio_resid = swap->blk_size;
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auio.uio_td = td;
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vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
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VOP_READ(vp, &auio, 0, swap->swap_cred);
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VOP_UNLOCK(vp, 0);
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return (0);
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}
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struct chip_swap *
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nandsim_swap_init(const char *swap_file, uint32_t nof_blks, uint32_t blk_size)
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{
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struct chip_swap *swap;
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int err = 0;
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if ((swap_file == NULL) || (nof_blks == 0) || (blk_size == 0))
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return (NULL);
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swap = malloc(sizeof(*swap), M_NANDSIM, M_WAITOK | M_ZERO);
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SLIST_INIT(&swap->free_bs);
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STAILQ_INIT(&swap->used_bs);
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swap->blk_size = blk_size;
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swap->nof_blks = nof_blks;
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err = init_block_state(swap);
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if (err) {
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nandsim_swap_destroy(swap);
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return (NULL);
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}
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err = create_buffers(swap);
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if (err) {
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nandsim_swap_destroy(swap);
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return (NULL);
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}
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err = swap_file_open(swap, swap_file);
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if (err) {
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nandsim_swap_destroy(swap);
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return (NULL);
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}
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return (swap);
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}
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void
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nandsim_swap_destroy(struct chip_swap *swap)
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{
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if (swap == NULL)
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return;
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destroy_block_state(swap);
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destroy_buffers(swap);
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swap_file_close(swap);
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free(swap, M_NANDSIM);
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}
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struct block_space *
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get_bs(struct chip_swap *swap, uint32_t block, uint8_t writing)
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{
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struct block_state *blk_state, *old_blk_state = NULL;
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struct block_space *blk_space;
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if (swap == NULL || (block >= swap->nof_blks))
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return (NULL);
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blk_state = &swap->blk_state[block];
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nand_debug(NDBG_SIM,"blk_state %x\n", blk_state->status);
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if (blk_state->status & BLOCK_ALLOCATED) {
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blk_space = blk_state->blk_sp;
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} else {
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blk_space = SLIST_FIRST(&swap->free_bs);
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if (blk_space) {
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SLIST_REMOVE_HEAD(&swap->free_bs, free_link);
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STAILQ_INSERT_TAIL(&swap->used_bs, blk_space,
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used_link);
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} else {
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blk_space = STAILQ_FIRST(&swap->used_bs);
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old_blk_state = blk_space->blk_state;
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STAILQ_REMOVE_HEAD(&swap->used_bs, used_link);
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STAILQ_INSERT_TAIL(&swap->used_bs, blk_space,
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used_link);
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if (old_blk_state->status & BLOCK_DIRTY) {
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swap_file_write(swap, old_blk_state);
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old_blk_state->status &= ~BLOCK_DIRTY;
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old_blk_state->status |= BLOCK_SWAPPED;
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}
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}
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}
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if (blk_space == NULL)
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return (NULL);
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if (old_blk_state != NULL) {
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old_blk_state->status &= ~BLOCK_ALLOCATED;
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old_blk_state->blk_sp = NULL;
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}
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blk_state->blk_sp = blk_space;
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blk_space->blk_state = blk_state;
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if (!(blk_state->status & BLOCK_ALLOCATED)) {
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if (blk_state->status & BLOCK_SWAPPED)
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swap_file_read(swap, blk_state);
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else
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memset(blk_space->blk_ptr, 0xff, swap->blk_size);
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blk_state->status |= BLOCK_ALLOCATED;
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}
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if (writing)
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blk_state->status |= BLOCK_DIRTY;
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nand_debug(NDBG_SIM,"get_bs returned %p[%p] state %x\n", blk_space,
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blk_space->blk_ptr, blk_state->status);
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return (blk_space);
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}
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