1 // SPDX-License-Identifier: GPL-2.0-only
3  * Support for OMAP DES and Triple DES HW acceleration.
26 #include <linux/dma-mapping.h>
41 #include "omap-crypto.h"
47 #define _calc_walked(inout) (dd->inout##_walk.offset - dd->inout##_sg->offset)
49 #define DES_REG_KEY(dd, x)		((dd)->pdata->key_ofs - \
52 #define DES_REG_IV(dd, x)		((dd)->pdata->iv_ofs + ((x) * 0x04))
54 #define DES_REG_CTRL(dd)		((dd)->pdata->ctrl_ofs)
61 #define DES_REG_DATA_N(dd, x)		((dd)->pdata->data_ofs + ((x) * 0x04))
63 #define DES_REG_REV(dd)			((dd)->pdata->rev_ofs)
65 #define DES_REG_MASK(dd)		((dd)->pdata->mask_ofs)
69 #define DES_REG_IRQ_STATUS(dd)         ((dd)->pdata->irq_status_ofs)
70 #define DES_REG_IRQ_ENABLE(dd)         ((dd)->pdata->irq_enable_ofs)
178 	 _read_ret = __raw_readl(dd->io_base + offset);          \
186 	return __raw_readl(dd->io_base + offset);  in omap_des_read()
195 		__raw_writel(value, dd->io_base + offset);              \
201 	__raw_writel(value, dd->io_base + offset);  in omap_des_write()
219 	for (; count--; value++, offset += 4)  in omap_des_write_n()
232 	err = pm_runtime_resume_and_get(dd->dev);  in omap_des_hw_init()
234 		dev_err(dd->dev, "%s: failed to get_sync(%d)\n", __func__, err);  in omap_des_hw_init()
238 	if (!(dd->flags & FLAGS_INIT)) {  in omap_des_hw_init()
239 		dd->flags |= FLAGS_INIT;  in omap_des_hw_init()
240 		dd->err = 0;  in omap_des_hw_init()
256 	key32 = dd->ctx->keylen / sizeof(u32);  in omap_des_write_ctrl()
261 			       __le32_to_cpu(dd->ctx->key[i]));  in omap_des_write_ctrl()
264 	if ((dd->flags & FLAGS_CBC) && dd->req->iv)  in omap_des_write_ctrl()
265 		omap_des_write_n(dd, DES_REG_IV(dd, 0), (void *)dd->req->iv, 2);  in omap_des_write_ctrl()
267 	if (dd->flags & FLAGS_CBC)  in omap_des_write_ctrl()
269 	if (dd->flags & FLAGS_ENCRYPT)  in omap_des_write_ctrl()
287 	val = dd->pdata->dma_start;  in omap_des_dma_trigger_omap4()
289 	if (dd->dma_lch_out != NULL)  in omap_des_dma_trigger_omap4()
290 		val |= dd->pdata->dma_enable_out;  in omap_des_dma_trigger_omap4()
291 	if (dd->dma_lch_in != NULL)  in omap_des_dma_trigger_omap4()
292 		val |= dd->pdata->dma_enable_in;  in omap_des_dma_trigger_omap4()
294 	mask = dd->pdata->dma_enable_out | dd->pdata->dma_enable_in |  in omap_des_dma_trigger_omap4()
295 	       dd->pdata->dma_start;  in omap_des_dma_trigger_omap4()
304 	mask = dd->pdata->dma_enable_out | dd->pdata->dma_enable_in |  in omap_des_dma_stop()
305 	       dd->pdata->dma_start;  in omap_des_dma_stop()
315 	if (!ctx->dd) {  in omap_des_find_dev()
321 		ctx->dd = dd;  in omap_des_find_dev()
324 		dd = ctx->dd;  in omap_des_find_dev()
335 	/* dma_lch_out - completed */  in omap_des_dma_out_callback()
336 	tasklet_schedule(&dd->done_task);  in omap_des_dma_out_callback()
343 	dd->dma_lch_out = NULL;  in omap_des_dma_init()
344 	dd->dma_lch_in = NULL;  in omap_des_dma_init()
346 	dd->dma_lch_in = dma_request_chan(dd->dev, "rx");  in omap_des_dma_init()
347 	if (IS_ERR(dd->dma_lch_in)) {  in omap_des_dma_init()
348 		dev_err(dd->dev, "Unable to request in DMA channel\n");  in omap_des_dma_init()
349 		return PTR_ERR(dd->dma_lch_in);  in omap_des_dma_init()
352 	dd->dma_lch_out = dma_request_chan(dd->dev, "tx");  in omap_des_dma_init()
353 	if (IS_ERR(dd->dma_lch_out)) {  in omap_des_dma_init()
354 		dev_err(dd->dev, "Unable to request out DMA channel\n");  in omap_des_dma_init()
355 		err = PTR_ERR(dd->dma_lch_out);  in omap_des_dma_init()
362 	dma_release_channel(dd->dma_lch_in);  in omap_des_dma_init()
369 	if (dd->pio_only)  in omap_des_dma_cleanup()
372 	dma_release_channel(dd->dma_lch_out);  in omap_des_dma_cleanup()
373 	dma_release_channel(dd->dma_lch_in);  in omap_des_dma_cleanup()
381 	struct omap_des_dev *dd = ctx->dd;  in omap_des_crypt_dma()
386 	if (dd->pio_only) {  in omap_des_crypt_dma()
387 		scatterwalk_start(&dd->in_walk, dd->in_sg);  in omap_des_crypt_dma()
388 		scatterwalk_start(&dd->out_walk, dd->out_sg);  in omap_des_crypt_dma()
396 	dma_sync_sg_for_device(dd->dev, dd->in_sg, in_sg_len, DMA_TO_DEVICE);  in omap_des_crypt_dma()
400 	cfg.src_addr = dd->phys_base + DES_REG_DATA_N(dd, 0);  in omap_des_crypt_dma()
401 	cfg.dst_addr = dd->phys_base + DES_REG_DATA_N(dd, 0);  in omap_des_crypt_dma()
408 	ret = dmaengine_slave_config(dd->dma_lch_in, &cfg);  in omap_des_crypt_dma()
410 		dev_err(dd->dev, "can't configure IN dmaengine slave: %d\n",  in omap_des_crypt_dma()
415 	tx_in = dmaengine_prep_slave_sg(dd->dma_lch_in, in_sg, in_sg_len,  in omap_des_crypt_dma()
419 		dev_err(dd->dev, "IN prep_slave_sg() failed\n");  in omap_des_crypt_dma()
420 		return -EINVAL;  in omap_des_crypt_dma()
424 	tx_in->callback_param = dd;  in omap_des_crypt_dma()
427 	ret = dmaengine_slave_config(dd->dma_lch_out, &cfg);  in omap_des_crypt_dma()
429 		dev_err(dd->dev, "can't configure OUT dmaengine slave: %d\n",  in omap_des_crypt_dma()
434 	tx_out = dmaengine_prep_slave_sg(dd->dma_lch_out, out_sg, out_sg_len,  in omap_des_crypt_dma()
438 		dev_err(dd->dev, "OUT prep_slave_sg() failed\n");  in omap_des_crypt_dma()
439 		return -EINVAL;  in omap_des_crypt_dma()
442 	tx_out->callback = omap_des_dma_out_callback;  in omap_des_crypt_dma()
443 	tx_out->callback_param = dd;  in omap_des_crypt_dma()
448 	dma_async_issue_pending(dd->dma_lch_in);  in omap_des_crypt_dma()
449 	dma_async_issue_pending(dd->dma_lch_out);  in omap_des_crypt_dma()
452 	dd->pdata->trigger(dd, dd->total);  in omap_des_crypt_dma()
460 					crypto_skcipher_reqtfm(dd->req));  in omap_des_crypt_dma_start()
463 	pr_debug("total: %zd\n", dd->total);  in omap_des_crypt_dma_start()
465 	if (!dd->pio_only) {  in omap_des_crypt_dma_start()
466 		err = dma_map_sg(dd->dev, dd->in_sg, dd->in_sg_len,  in omap_des_crypt_dma_start()
469 			dev_err(dd->dev, "dma_map_sg() error\n");  in omap_des_crypt_dma_start()
470 			return -EINVAL;  in omap_des_crypt_dma_start()
473 		err = dma_map_sg(dd->dev, dd->out_sg, dd->out_sg_len,  in omap_des_crypt_dma_start()
476 			dev_err(dd->dev, "dma_map_sg() error\n");  in omap_des_crypt_dma_start()
477 			return -EINVAL;  in omap_des_crypt_dma_start()
481 	err = omap_des_crypt_dma(tfm, dd->in_sg, dd->out_sg, dd->in_sg_len,  in omap_des_crypt_dma_start()
482 				 dd->out_sg_len);  in omap_des_crypt_dma_start()
483 	if (err && !dd->pio_only) {  in omap_des_crypt_dma_start()
484 		dma_unmap_sg(dd->dev, dd->in_sg, dd->in_sg_len, DMA_TO_DEVICE);  in omap_des_crypt_dma_start()
485 		dma_unmap_sg(dd->dev, dd->out_sg, dd->out_sg_len,  in omap_des_crypt_dma_start()
494 	struct skcipher_request *req = dd->req;  in omap_des_finish_req()
498 	crypto_finalize_skcipher_request(dd->engine, req, err);  in omap_des_finish_req()
500 	pm_runtime_mark_last_busy(dd->dev);  in omap_des_finish_req()
501 	pm_runtime_put_autosuspend(dd->dev);  in omap_des_finish_req()
506 	pr_debug("total: %zd\n", dd->total);  in omap_des_crypt_dma_stop()
510 	dmaengine_terminate_all(dd->dma_lch_in);  in omap_des_crypt_dma_stop()
511 	dmaengine_terminate_all(dd->dma_lch_out);  in omap_des_crypt_dma_stop()
520 		return crypto_transfer_skcipher_request_to_engine(dd->engine, req);  in omap_des_handle_queue()
537 		return -ENODEV;  in omap_des_prepare_req()
540 	dd->req = req;  in omap_des_prepare_req()
541 	dd->total = req->cryptlen;  in omap_des_prepare_req()
542 	dd->total_save = req->cryptlen;  in omap_des_prepare_req()
543 	dd->in_sg = req->src;  in omap_des_prepare_req()
544 	dd->out_sg = req->dst;  in omap_des_prepare_req()
545 	dd->orig_out = req->dst;  in omap_des_prepare_req()
548 	if (req->src == req->dst)  in omap_des_prepare_req()
551 	ret = omap_crypto_align_sg(&dd->in_sg, dd->total, DES_BLOCK_SIZE,  in omap_des_prepare_req()
552 				   &dd->in_sgl, flags,  in omap_des_prepare_req()
553 				   FLAGS_IN_DATA_ST_SHIFT, &dd->flags);  in omap_des_prepare_req()
557 	ret = omap_crypto_align_sg(&dd->out_sg, dd->total, DES_BLOCK_SIZE,  in omap_des_prepare_req()
558 				   &dd->out_sgl, 0,  in omap_des_prepare_req()
559 				   FLAGS_OUT_DATA_ST_SHIFT, &dd->flags);  in omap_des_prepare_req()
563 	dd->in_sg_len = sg_nents_for_len(dd->in_sg, dd->total);  in omap_des_prepare_req()
564 	if (dd->in_sg_len < 0)  in omap_des_prepare_req()
565 		return dd->in_sg_len;  in omap_des_prepare_req()
567 	dd->out_sg_len = sg_nents_for_len(dd->out_sg, dd->total);  in omap_des_prepare_req()
568 	if (dd->out_sg_len < 0)  in omap_des_prepare_req()
569 		return dd->out_sg_len;  in omap_des_prepare_req()
573 	rctx->mode &= FLAGS_MODE_MASK;  in omap_des_prepare_req()
574 	dd->flags = (dd->flags & ~FLAGS_MODE_MASK) | rctx->mode;  in omap_des_prepare_req()
576 	dd->ctx = ctx;  in omap_des_prepare_req()
577 	ctx->dd = dd;  in omap_des_prepare_req()
591 		return -ENODEV;  in omap_des_crypt_req()
603 	if (!dd->pio_only) {  in omap_des_done_task()
604 		dma_sync_sg_for_device(dd->dev, dd->out_sg, dd->out_sg_len,  in omap_des_done_task()
606 		dma_unmap_sg(dd->dev, dd->in_sg, dd->in_sg_len, DMA_TO_DEVICE);  in omap_des_done_task()
607 		dma_unmap_sg(dd->dev, dd->out_sg, dd->out_sg_len,  in omap_des_done_task()
612 	omap_crypto_cleanup(&dd->in_sgl, NULL, 0, dd->total_save,  in omap_des_done_task()
613 			    FLAGS_IN_DATA_ST_SHIFT, dd->flags);  in omap_des_done_task()
615 	omap_crypto_cleanup(&dd->out_sgl, dd->orig_out, 0, dd->total_save,  in omap_des_done_task()
616 			    FLAGS_OUT_DATA_ST_SHIFT, dd->flags);  in omap_des_done_task()
618 	if ((dd->flags & FLAGS_CBC) && dd->req->iv)  in omap_des_done_task()
620 			((u32 *)dd->req->iv)[i] =  in omap_des_done_task()
635 	pr_debug("nbytes: %d, enc: %d, cbc: %d\n", req->cryptlen,  in omap_des_crypt()
639 	if (!req->cryptlen)  in omap_des_crypt()
642 	if (!IS_ALIGNED(req->cryptlen, DES_BLOCK_SIZE))  in omap_des_crypt()
643 		return -EINVAL;  in omap_des_crypt()
647 		return -ENODEV;  in omap_des_crypt()
649 	rctx->mode = mode;  in omap_des_crypt()
668 	memcpy(ctx->key, key, keylen);  in omap_des_setkey()
669 	ctx->keylen = keylen;  in omap_des_setkey()
686 	memcpy(ctx->key, key, keylen);  in omap_des3_setkey()
687 	ctx->keylen = keylen;  in omap_des3_setkey()
725 	ctx->enginectx.op.prepare_request = omap_des_prepare_req;  in omap_des_init_tfm()
726 	ctx->enginectx.op.unprepare_request = NULL;  in omap_des_init_tfm()
727 	ctx->enginectx.op.do_one_request = omap_des_crypt_req;  in omap_des_init_tfm()
737 	.base.cra_driver_name	= "ecb-des-omap",
754 	.base.cra_driver_name	= "cbc-des-omap",
772 	.base.cra_driver_name	= "ecb-des3-omap",
789 	.base.cra_driver_name	= "cbc-des3-omap",
845 		BUG_ON(!dd->in_sg);  in omap_des_irq()
847 		BUG_ON(_calc_walked(in) > dd->in_sg->length);  in omap_des_irq()
849 		src = sg_virt(dd->in_sg) + _calc_walked(in);  in omap_des_irq()
854 			scatterwalk_advance(&dd->in_walk, 4);  in omap_des_irq()
855 			if (dd->in_sg->length == _calc_walked(in)) {  in omap_des_irq()
856 				dd->in_sg = sg_next(dd->in_sg);  in omap_des_irq()
857 				if (dd->in_sg) {  in omap_des_irq()
858 					scatterwalk_start(&dd->in_walk,  in omap_des_irq()
859 							  dd->in_sg);  in omap_des_irq()
860 					src = sg_virt(dd->in_sg) +  in omap_des_irq()
878 		BUG_ON(!dd->out_sg);  in omap_des_irq()
880 		BUG_ON(_calc_walked(out) > dd->out_sg->length);  in omap_des_irq()
882 		dst = sg_virt(dd->out_sg) + _calc_walked(out);  in omap_des_irq()
886 			scatterwalk_advance(&dd->out_walk, 4);  in omap_des_irq()
887 			if (dd->out_sg->length == _calc_walked(out)) {  in omap_des_irq()
888 				dd->out_sg = sg_next(dd->out_sg);  in omap_des_irq()
889 				if (dd->out_sg) {  in omap_des_irq()
890 					scatterwalk_start(&dd->out_walk,  in omap_des_irq()
891 							  dd->out_sg);  in omap_des_irq()
892 					dst = sg_virt(dd->out_sg) +  in omap_des_irq()
900 		BUG_ON(dd->total < DES_BLOCK_SIZE);  in omap_des_irq()
902 		dd->total -= DES_BLOCK_SIZE;  in omap_des_irq()
908 		if (!dd->total)  in omap_des_irq()
910 			tasklet_schedule(&dd->done_task);  in omap_des_irq()
921 		.compatible	= "ti,omap4-des",
932 	dd->pdata = of_device_get_match_data(&pdev->dev);  in omap_des_get_of()
933 	if (!dd->pdata) {  in omap_des_get_of()
934 		dev_err(&pdev->dev, "no compatible OF match\n");  in omap_des_get_of()
935 		return -EINVAL;  in omap_des_get_of()
944 	return -EINVAL;  in omap_des_get_of()
951 	/* non-DT devices get pdata from pdev */  in omap_des_get_pdev()
952 	dd->pdata = pdev->dev.platform_data;  in omap_des_get_pdev()
959 	struct device *dev = &pdev->dev;  in omap_des_probe()
963 	int err = -ENOMEM, i, j, irq = -1;  in omap_des_probe()
971 	dd->dev = dev;  in omap_des_probe()
980 	err = (dev->of_node) ? omap_des_get_of(dd, pdev) :  in omap_des_probe()
985 	dd->io_base = devm_ioremap_resource(dev, res);  in omap_des_probe()
986 	if (IS_ERR(dd->io_base)) {  in omap_des_probe()
987 		err = PTR_ERR(dd->io_base);  in omap_des_probe()
990 	dd->phys_base = res->start;  in omap_des_probe()
998 		dev_err(dd->dev, "%s: failed to get_sync(%d)\n", __func__, err);  in omap_des_probe()
1009 		 (reg & dd->pdata->major_mask) >> dd->pdata->major_shift,  in omap_des_probe()
1010 		 (reg & dd->pdata->minor_mask) >> dd->pdata->minor_shift);  in omap_des_probe()
1012 	tasklet_init(&dd->done_task, omap_des_done_task, (unsigned long)dd);  in omap_des_probe()
1015 	if (err == -EPROBE_DEFER) {  in omap_des_probe()
1018 		dd->pio_only = 1;  in omap_des_probe()
1029 			dev_err(dev, "Unable to grab omap-des IRQ\n");  in omap_des_probe()
1035 	INIT_LIST_HEAD(&dd->list);  in omap_des_probe()
1037 	list_add_tail(&dd->list, &dev_list);  in omap_des_probe()
1041 	dd->engine = crypto_engine_alloc_init(dev, 1);  in omap_des_probe()
1042 	if (!dd->engine) {  in omap_des_probe()
1043 		err = -ENOMEM;  in omap_des_probe()
1047 	err = crypto_engine_start(dd->engine);  in omap_des_probe()
1051 	for (i = 0; i < dd->pdata->algs_info_size; i++) {  in omap_des_probe()
1052 		for (j = 0; j < dd->pdata->algs_info[i].size; j++) {  in omap_des_probe()
1053 			algp = &dd->pdata->algs_info[i].algs_list[j];  in omap_des_probe()
1055 			pr_debug("reg alg: %s\n", algp->base.cra_name);  in omap_des_probe()
1061 			dd->pdata->algs_info[i].registered++;  in omap_des_probe()
1068 	for (i = dd->pdata->algs_info_size - 1; i >= 0; i--)  in omap_des_probe()
1069 		for (j = dd->pdata->algs_info[i].registered - 1; j >= 0; j--)  in omap_des_probe()
1071 					&dd->pdata->algs_info[i].algs_list[j]);  in omap_des_probe()
1074 	if (dd->engine)  in omap_des_probe()
1075 		crypto_engine_exit(dd->engine);  in omap_des_probe()
1079 	tasklet_kill(&dd->done_task);  in omap_des_probe()
1095 	list_del(&dd->list);  in omap_des_remove()
1098 	for (i = dd->pdata->algs_info_size - 1; i >= 0; i--)  in omap_des_remove()
1099 		for (j = dd->pdata->algs_info[i].registered - 1; j >= 0; j--)  in omap_des_remove()
1101 					&dd->pdata->algs_info[i].algs_list[j]);  in omap_des_remove()
1103 	tasklet_kill(&dd->done_task);  in omap_des_remove()
1105 	pm_runtime_disable(dd->dev);  in omap_des_remove()
1136 		.name	= "omap-des",