dev/nand/nandsim_swap.c

60 init_block_state(struct chip_swap *swap)
65 	if (swap == NULL)
68 	blk_state = malloc(swap->nof_blks * sizeof(struct block_state),
71 	for (i = 0; i < swap->nof_blks; i++)
74 	swap->blk_state = blk_state;
80 destroy_block_state(struct chip_swap *swap)
83 	if (swap == NULL)
86 	if (swap->blk_state != NULL)
87 		free(swap->blk_state, M_NANDSIM);
91 create_buffers(struct chip_swap *swap)
99 		block = malloc(swap->blk_size, M_NANDSIM, M_WAITOK);
101 		SLIST_INSERT_HEAD(&swap->free_bs, block_space, free_link);
113 destroy_buffers(struct chip_swap *swap)
117 	if (swap == NULL)
120 	blk_space = SLIST_FIRST(&swap->free_bs);
122 		SLIST_REMOVE_HEAD(&swap->free_bs, free_link);
127 		blk_space = SLIST_FIRST(&swap->free_bs);
130 	blk_space = STAILQ_FIRST(&swap->used_bs);
132 		STAILQ_REMOVE_HEAD(&swap->used_bs, used_link);
137 		blk_space = STAILQ_FIRST(&swap->used_bs);
142 swap_file_open(struct chip_swap *swap, const char *swap_file)
154 		nand_debug(NDBG_SIM,"Cannot create swap file %s", swap_file);
159 	swap->swap_cred = crhold(curthread->td_ucred);
165 	swap->swap_vp = nd.ni_vp;
171 swap_file_close(struct chip_swap *swap)
174 	if (swap == NULL)
177 	if (swap->swap_vp == NULL)
180 	vn_close(swap->swap_vp, FWRITE, swap->swap_cred, curthread);
181 	crfree(swap->swap_cred);
185 swap_file_write(struct chip_swap *swap, struct block_state *blk_state)
194 	if (swap == NULL || blk_state == NULL)
199 		blk_state->offset = swap->swap_offset;
200 		swap->swap_offset += swap->blk_size;
210 	aiov.iov_len = swap->blk_size;
212 	vp = swap->swap_vp;
219 	auio.uio_resid = swap->blk_size;
224 	VOP_WRITE(vp, &auio, IO_UNIT, swap->swap_cred);
232 swap_file_read(struct chip_swap *swap, struct block_state *blk_state)
240 	if (swap == NULL || blk_state == NULL)
252 	aiov.iov_len = swap->blk_size;
254 	vp = swap->swap_vp;
261 	auio.uio_resid = swap->blk_size;
265 	VOP_READ(vp, &auio, 0, swap->swap_cred);
274 	struct chip_swap *swap;
280 	swap = malloc(sizeof(*swap), M_NANDSIM, M_WAITOK | M_ZERO);
282 	SLIST_INIT(&swap->free_bs);
283 	STAILQ_INIT(&swap->used_bs);
284 	swap->blk_size = blk_size;
285 	swap->nof_blks = nof_blks;
287 	err = init_block_state(swap);
289 		nandsim_swap_destroy(swap);
293 	err = create_buffers(swap);
295 		nandsim_swap_destroy(swap);
299 	err = swap_file_open(swap, swap_file);
301 		nandsim_swap_destroy(swap);
305 	return (swap);
309 nandsim_swap_destroy(struct chip_swap *swap)
312 	if (swap == NULL)
315 	destroy_block_state(swap);
316 	destroy_buffers(swap);
317 	swap_file_close(swap);
318 	free(swap, M_NANDSIM);
322 get_bs(struct chip_swap *swap, uint32_t block, uint8_t writing)
327 	if (swap == NULL || (block >= swap->nof_blks))
330 	blk_state = &swap->blk_state[block];
336 		blk_space = SLIST_FIRST(&swap->free_bs);
338 			SLIST_REMOVE_HEAD(&swap->free_bs, free_link);
339 			STAILQ_INSERT_TAIL(&swap->used_bs, blk_space,
342 			blk_space = STAILQ_FIRST(&swap->used_bs);
344 			STAILQ_REMOVE_HEAD(&swap->used_bs, used_link);
345 			STAILQ_INSERT_TAIL(&swap->used_bs, blk_space,
348 				swap_file_write(swap, old_blk_state);
368 			swap_file_read(swap, blk_state);
370 			memset(blk_space->blk_ptr, 0xff, swap->blk_size);