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Diffstat (limited to 'sys/dev/nand/nandsim_swap.c')
-rw-r--r--sys/dev/nand/nandsim_swap.c383
1 files changed, 0 insertions, 383 deletions
diff --git a/sys/dev/nand/nandsim_swap.c b/sys/dev/nand/nandsim_swap.c
deleted file mode 100644
index 78e14e9557bd..000000000000
--- a/sys/dev/nand/nandsim_swap.c
+++ /dev/null
@@ -1,383 +0,0 @@
-/*-
- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
- *
- * Copyright (C) 2009-2012 Semihalf
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
-
-#include <sys/param.h>
-#include <sys/types.h>
-#include <sys/systm.h>
-#include <sys/malloc.h>
-#include <sys/queue.h>
-#include <sys/fcntl.h>
-#include <sys/proc.h>
-#include <sys/namei.h>
-#include <sys/lock.h>
-#include <sys/vnode.h>
-#include <sys/mount.h>
-
-#include <dev/nand/nandsim_chip.h>
-#include <dev/nand/nandsim_swap.h>
-
-static int init_block_state(struct chip_swap *);
-static void destroy_block_state(struct chip_swap *);
-
-static int create_buffers(struct chip_swap *);
-static void destroy_buffers(struct chip_swap *);
-
-static int swap_file_open(struct chip_swap *, const char *);
-static void swap_file_close(struct chip_swap *);
-static int swap_file_write(struct chip_swap *, struct block_state *);
-static int swap_file_read(struct chip_swap *, struct block_state *);
-
-#define CHIP_SWAP_CMODE 0600
-#define CHIP_SWAP_BLOCKSPACES 2
-
-static int
-init_block_state(struct chip_swap *swap)
-{
- struct block_state *blk_state;
- int i;
-
- if (swap == NULL)
- return (-1);
-
- blk_state = malloc(swap->nof_blks * sizeof(struct block_state),
- M_NANDSIM, M_WAITOK | M_ZERO);
-
- for (i = 0; i < swap->nof_blks; i++)
- blk_state[i].offset = 0xffffffff;
-
- swap->blk_state = blk_state;
-
- return (0);
-}
-
-static void
-destroy_block_state(struct chip_swap *swap)
-{
-
- if (swap == NULL)
- return;
-
- if (swap->blk_state != NULL)
- free(swap->blk_state, M_NANDSIM);
-}
-
-static int
-create_buffers(struct chip_swap *swap)
-{
- struct block_space *block_space;
- void *block;
- int i;
-
- for (i = 0; i < CHIP_SWAP_BLOCKSPACES; i++) {
- block_space = malloc(sizeof(*block_space), M_NANDSIM, M_WAITOK);
- block = malloc(swap->blk_size, M_NANDSIM, M_WAITOK);
- block_space->blk_ptr = block;
- SLIST_INSERT_HEAD(&swap->free_bs, block_space, free_link);
- nand_debug(NDBG_SIM,"created blk_space %p[%p]\n", block_space,
- block);
- }
-
- if (i == 0)
- return (-1);
-
- return (0);
-}
-
-static void
-destroy_buffers(struct chip_swap *swap)
-{
- struct block_space *blk_space;
-
- if (swap == NULL)
- return;
-
- blk_space = SLIST_FIRST(&swap->free_bs);
- while (blk_space) {
- SLIST_REMOVE_HEAD(&swap->free_bs, free_link);
- nand_debug(NDBG_SIM,"destroyed blk_space %p[%p]\n",
- blk_space, blk_space->blk_ptr);
- free(blk_space->blk_ptr, M_NANDSIM);
- free(blk_space, M_NANDSIM);
- blk_space = SLIST_FIRST(&swap->free_bs);
- }
-
- blk_space = STAILQ_FIRST(&swap->used_bs);
- while (blk_space) {
- STAILQ_REMOVE_HEAD(&swap->used_bs, used_link);
- nand_debug(NDBG_SIM,"destroyed blk_space %p[%p]\n",
- blk_space, blk_space->blk_ptr);
- free(blk_space->blk_ptr, M_NANDSIM);
- free(blk_space, M_NANDSIM);
- blk_space = STAILQ_FIRST(&swap->used_bs);
- }
-}
-
-static int
-swap_file_open(struct chip_swap *swap, const char *swap_file)
-{
- struct nameidata nd;
- int flags, error;
-
- NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_SYSSPACE, swap_file,
- curthread);
-
- flags = FWRITE | FREAD | O_NOFOLLOW | O_CREAT | O_TRUNC;
-
- error = vn_open(&nd, &flags, CHIP_SWAP_CMODE, NULL);
- if (error) {
- nand_debug(NDBG_SIM,"Cannot create swap file %s", swap_file);
- NDFREE(&nd, NDF_ONLY_PNBUF);
- return (error);
- }
-
- swap->swap_cred = crhold(curthread->td_ucred);
- NDFREE(&nd, NDF_ONLY_PNBUF);
-
- /* We just unlock so we hold a reference */
- VOP_UNLOCK(nd.ni_vp, 0);
-
- swap->swap_vp = nd.ni_vp;
-
- return (0);
-}
-
-static void
-swap_file_close(struct chip_swap *swap)
-{
-
- if (swap == NULL)
- return;
-
- if (swap->swap_vp == NULL)
- return;
-
- vn_close(swap->swap_vp, FWRITE, swap->swap_cred, curthread);
- crfree(swap->swap_cred);
-}
-
-static int
-swap_file_write(struct chip_swap *swap, struct block_state *blk_state)
-{
- struct block_space *blk_space;
- struct thread *td;
- struct mount *mp;
- struct vnode *vp;
- struct uio auio;
- struct iovec aiov;
-
- if (swap == NULL || blk_state == NULL)
- return (-1);
-
- blk_space = blk_state->blk_sp;
- if (blk_state->offset == -1) {
- blk_state->offset = swap->swap_offset;
- swap->swap_offset += swap->blk_size;
- }
-
- nand_debug(NDBG_SIM,"saving %p[%p] at %x\n",
- blk_space, blk_space->blk_ptr, blk_state->offset);
-
- bzero(&aiov, sizeof(aiov));
- bzero(&auio, sizeof(auio));
-
- aiov.iov_base = blk_space->blk_ptr;
- aiov.iov_len = swap->blk_size;
- td = curthread;
- vp = swap->swap_vp;
-
- auio.uio_iov = &aiov;
- auio.uio_offset = blk_state->offset;
- auio.uio_segflg = UIO_SYSSPACE;
- auio.uio_rw = UIO_WRITE;
- auio.uio_iovcnt = 1;
- auio.uio_resid = swap->blk_size;
- auio.uio_td = td;
-
- vn_start_write(vp, &mp, V_WAIT);
- vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
- VOP_WRITE(vp, &auio, IO_UNIT, swap->swap_cred);
- VOP_UNLOCK(vp, 0);
- vn_finished_write(mp);
-
- return (0);
-}
-
-static int
-swap_file_read(struct chip_swap *swap, struct block_state *blk_state)
-{
- struct block_space *blk_space;
- struct thread *td;
- struct vnode *vp;
- struct uio auio;
- struct iovec aiov;
-
- if (swap == NULL || blk_state == NULL)
- return (-1);
-
- blk_space = blk_state->blk_sp;
-
- nand_debug(NDBG_SIM,"restore %p[%p] at %x\n",
- blk_space, blk_space->blk_ptr, blk_state->offset);
-
- bzero(&aiov, sizeof(aiov));
- bzero(&auio, sizeof(auio));
-
- aiov.iov_base = blk_space->blk_ptr;
- aiov.iov_len = swap->blk_size;
- td = curthread;
- vp = swap->swap_vp;
-
- auio.uio_iov = &aiov;
- auio.uio_offset = blk_state->offset;
- auio.uio_segflg = UIO_SYSSPACE;
- auio.uio_rw = UIO_READ;
- auio.uio_iovcnt = 1;
- auio.uio_resid = swap->blk_size;
- auio.uio_td = td;
-
- vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
- VOP_READ(vp, &auio, 0, swap->swap_cred);
- VOP_UNLOCK(vp, 0);
-
- return (0);
-}
-
-struct chip_swap *
-nandsim_swap_init(const char *swap_file, uint32_t nof_blks, uint32_t blk_size)
-{
- struct chip_swap *swap;
- int err = 0;
-
- if ((swap_file == NULL) || (nof_blks == 0) || (blk_size == 0))
- return (NULL);
-
- swap = malloc(sizeof(*swap), M_NANDSIM, M_WAITOK | M_ZERO);
-
- SLIST_INIT(&swap->free_bs);
- STAILQ_INIT(&swap->used_bs);
- swap->blk_size = blk_size;
- swap->nof_blks = nof_blks;
-
- err = init_block_state(swap);
- if (err) {
- nandsim_swap_destroy(swap);
- return (NULL);
- }
-
- err = create_buffers(swap);
- if (err) {
- nandsim_swap_destroy(swap);
- return (NULL);
- }
-
- err = swap_file_open(swap, swap_file);
- if (err) {
- nandsim_swap_destroy(swap);
- return (NULL);
- }
-
- return (swap);
-}
-
-void
-nandsim_swap_destroy(struct chip_swap *swap)
-{
-
- if (swap == NULL)
- return;
-
- destroy_block_state(swap);
- destroy_buffers(swap);
- swap_file_close(swap);
- free(swap, M_NANDSIM);
-}
-
-struct block_space *
-get_bs(struct chip_swap *swap, uint32_t block, uint8_t writing)
-{
- struct block_state *blk_state, *old_blk_state = NULL;
- struct block_space *blk_space;
-
- if (swap == NULL || (block >= swap->nof_blks))
- return (NULL);
-
- blk_state = &swap->blk_state[block];
- nand_debug(NDBG_SIM,"blk_state %x\n", blk_state->status);
-
- if (blk_state->status & BLOCK_ALLOCATED) {
- blk_space = blk_state->blk_sp;
- } else {
- blk_space = SLIST_FIRST(&swap->free_bs);
- if (blk_space) {
- SLIST_REMOVE_HEAD(&swap->free_bs, free_link);
- STAILQ_INSERT_TAIL(&swap->used_bs, blk_space,
- used_link);
- } else {
- blk_space = STAILQ_FIRST(&swap->used_bs);
- old_blk_state = blk_space->blk_state;
- STAILQ_REMOVE_HEAD(&swap->used_bs, used_link);
- STAILQ_INSERT_TAIL(&swap->used_bs, blk_space,
- used_link);
- if (old_blk_state->status & BLOCK_DIRTY) {
- swap_file_write(swap, old_blk_state);
- old_blk_state->status &= ~BLOCK_DIRTY;
- old_blk_state->status |= BLOCK_SWAPPED;
- }
- }
- }
-
- if (blk_space == NULL)
- return (NULL);
-
- if (old_blk_state != NULL) {
- old_blk_state->status &= ~BLOCK_ALLOCATED;
- old_blk_state->blk_sp = NULL;
- }
-
- blk_state->blk_sp = blk_space;
- blk_space->blk_state = blk_state;
-
- if (!(blk_state->status & BLOCK_ALLOCATED)) {
- if (blk_state->status & BLOCK_SWAPPED)
- swap_file_read(swap, blk_state);
- else
- memset(blk_space->blk_ptr, 0xff, swap->blk_size);
- blk_state->status |= BLOCK_ALLOCATED;
- }
-
- if (writing)
- blk_state->status |= BLOCK_DIRTY;
-
- nand_debug(NDBG_SIM,"get_bs returned %p[%p] state %x\n", blk_space,
- blk_space->blk_ptr, blk_state->status);
-
- return (blk_space);
-}