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-rw-r--r--target/linux/omap/patches-3.12/600-crypto-omap-des-Add-omap-des-driver-for-OMAP4-AM43xx.patch1233
1 files changed, 1233 insertions, 0 deletions
diff --git a/target/linux/omap/patches-3.12/600-crypto-omap-des-Add-omap-des-driver-for-OMAP4-AM43xx.patch b/target/linux/omap/patches-3.12/600-crypto-omap-des-Add-omap-des-driver-for-OMAP4-AM43xx.patch
new file mode 100644
index 0000000000..14e3fbe746
--- /dev/null
+++ b/target/linux/omap/patches-3.12/600-crypto-omap-des-Add-omap-des-driver-for-OMAP4-AM43xx.patch
@@ -0,0 +1,1233 @@
+From patchwork Thu Aug 29 23:27:51 2013
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+Subject: [1/3] crypto: omap-des: Add omap-des driver for OMAP4/AM43xx
+From: Joel Fernandes <joelf@ti.com>
+X-Patchwork-Id: 2851675
+Message-Id: <1377818873-21174-2-git-send-email-joelf@ti.com>
+To: Herbert Xu <herbert@gondor.hengli.com.au>, "David S. Miller"
+ <davem@davemloft.net>, Mark Greer <mgreer@animalcreek.com>, Tony Lindgren
+ <tony@atomide.com>, Lokesh Vutla <lokeshvutla@ti.com>
+Cc: Joel Fernandes <joelf@ti.com>,
+ Linux OMAP List <linux-omap@vger.kernel.org>,
+ Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
+ Linux ARM Kernel List <linux-arm-kernel@lists.infradead.org>,
+ Linux Crypto Mailing List <linux-crypto@vger.kernel.org>
+Date: Thu, 29 Aug 2013 18:27:51 -0500
+
+Add omap-des driver with platform data for OMAP4. Support added for DES
+ECB and CBC modes.
+
+Where possible, code is reused from omap-aes driver with changes made for
+adjusting key size, block size, removing non-existent encryption modes
+and adding support for OMAP4 platform data and offsets.
+
+Tests have been conducted with the CRYPTO test manager, and functionality
+is verified at different page length alignments.
+
+Signed-off-by: Joel Fernandes <joelf@ti.com>
+
+---
+drivers/crypto/omap-des.c | 1192 +++++++++++++++++++++++++++++++++++++++++++++
+ 1 file changed, 1192 insertions(+)
+ create mode 100644 drivers/crypto/omap-des.c
+
+diff --git a/drivers/crypto/omap-des.c b/drivers/crypto/omap-des.c
+new file mode 100644
+index 0000000..6a9a25f
+--- /dev/null
++++ b/drivers/crypto/omap-des.c
+@@ -0,0 +1,1192 @@
++/*
++ * Cryptographic API.
++ *
++ * Support for OMAP DES and Triple DES HW acceleration.
++ *
++ * Copyright (c) 2012 Texas Instruments Incorporated
++ * Author: Joel Fernandes <joelf@ti.com>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation.
++ *
++ */
++
++#define pr_fmt(fmt) "%s: " fmt, __func__
++
++#ifdef DEBUG
++#define prn(num) printk(#num "=%d\n", num)
++#define prx(num) printk(#num "=%x\n", num)
++#else
++#define prn(num) do { } while (0)
++#define prx(num) do { } while (0)
++#endif
++
++#include <linux/err.h>
++#include <linux/module.h>
++#include <linux/init.h>
++#include <linux/errno.h>
++#include <linux/kernel.h>
++#include <linux/platform_device.h>
++#include <linux/scatterlist.h>
++#include <linux/dma-mapping.h>
++#include <linux/dmaengine.h>
++#include <linux/omap-dma.h>
++#include <linux/pm_runtime.h>
++#include <linux/of.h>
++#include <linux/of_device.h>
++#include <linux/of_address.h>
++#include <linux/io.h>
++#include <linux/crypto.h>
++#include <linux/interrupt.h>
++#include <crypto/scatterwalk.h>
++#include <crypto/des.h>
++
++#define DST_MAXBURST 2
++
++#define DES_BLOCK_WORDS (DES_BLOCK_SIZE >> 2)
++
++#define _calc_walked(inout) (dd->inout##_walk.offset - dd->inout##_sg->offset)
++
++#define DES_REG_KEY(dd, x) ((dd)->pdata->key_ofs - \
++ ((x ^ 0x01) * 0x04))
++
++#define DES_REG_IV(dd, x) ((dd)->pdata->iv_ofs + ((x) * 0x04))
++
++#define DES_REG_CTRL(dd) ((dd)->pdata->ctrl_ofs)
++#define DES_REG_CTRL_CBC (1 << 4)
++#define DES_REG_CTRL_TDES (1 << 3)
++#define DES_REG_CTRL_DIRECTION (1 << 2)
++#define DES_REG_CTRL_INPUT_READY (1 << 1)
++#define DES_REG_CTRL_OUTPUT_READY (1 << 0)
++
++#define DES_REG_DATA_N(dd, x) ((dd)->pdata->data_ofs + ((x) * 0x04))
++
++#define DES_REG_REV(dd) ((dd)->pdata->rev_ofs)
++
++#define DES_REG_MASK(dd) ((dd)->pdata->mask_ofs)
++
++#define DES_REG_LENGTH_N(x) (0x24 + ((x) * 0x04))
++
++#define DES_REG_IRQ_STATUS(dd) ((dd)->pdata->irq_status_ofs)
++#define DES_REG_IRQ_ENABLE(dd) ((dd)->pdata->irq_enable_ofs)
++#define DES_REG_IRQ_DATA_IN BIT(1)
++#define DES_REG_IRQ_DATA_OUT BIT(2)
++
++#define FLAGS_MODE_MASK 0x000f
++#define FLAGS_ENCRYPT BIT(0)
++#define FLAGS_CBC BIT(1)
++#define FLAGS_INIT BIT(4)
++#define FLAGS_BUSY BIT(6)
++
++struct omap_des_ctx {
++ struct omap_des_dev *dd;
++
++ int keylen;
++ u32 key[DES_KEY_SIZE / sizeof(u32)];
++ unsigned long flags;
++};
++
++struct omap_des_reqctx {
++ unsigned long mode;
++};
++
++#define OMAP_DES_QUEUE_LENGTH 1
++#define OMAP_DES_CACHE_SIZE 0
++
++struct omap_des_algs_info {
++ struct crypto_alg *algs_list;
++ unsigned int size;
++ unsigned int registered;
++};
++
++struct omap_des_pdata {
++ struct omap_des_algs_info *algs_info;
++ unsigned int algs_info_size;
++
++ void (*trigger)(struct omap_des_dev *dd, int length);
++
++ u32 key_ofs;
++ u32 iv_ofs;
++ u32 ctrl_ofs;
++ u32 data_ofs;
++ u32 rev_ofs;
++ u32 mask_ofs;
++ u32 irq_enable_ofs;
++ u32 irq_status_ofs;
++
++ u32 dma_enable_in;
++ u32 dma_enable_out;
++ u32 dma_start;
++
++ u32 major_mask;
++ u32 major_shift;
++ u32 minor_mask;
++ u32 minor_shift;
++};
++
++struct omap_des_dev {
++ struct list_head list;
++ unsigned long phys_base;
++ void __iomem *io_base;
++ struct omap_des_ctx *ctx;
++ struct device *dev;
++ unsigned long flags;
++ int err;
++
++ /* spinlock used for queues */
++ spinlock_t lock;
++ struct crypto_queue queue;
++
++ struct tasklet_struct done_task;
++ struct tasklet_struct queue_task;
++
++ struct ablkcipher_request *req;
++ /*
++ * total is used by PIO mode for book keeping so introduce
++ * variable total_save as need it to calc page_order
++ */
++ size_t total;
++ size_t total_save;
++
++ struct scatterlist *in_sg;
++ struct scatterlist *out_sg;
++
++ /* Buffers for copying for unaligned cases */
++ struct scatterlist in_sgl;
++ struct scatterlist out_sgl;
++ struct scatterlist *orig_out;
++ int sgs_copied;
++
++ struct scatter_walk in_walk;
++ struct scatter_walk out_walk;
++ int dma_in;
++ struct dma_chan *dma_lch_in;
++ int dma_out;
++ struct dma_chan *dma_lch_out;
++ int in_sg_len;
++ int out_sg_len;
++ int pio_only;
++ const struct omap_des_pdata *pdata;
++};
++
++/* keep registered devices data here */
++static LIST_HEAD(dev_list);
++static DEFINE_SPINLOCK(list_lock);
++
++#ifdef DEBUG
++#define omap_des_read(dd, offset) \
++ ({ \
++ int _read_ret; \
++ _read_ret = __raw_readl(dd->io_base + offset); \
++ pr_err("omap_des_read(" #offset "=%#x)= %#x\n", \
++ offset, _read_ret); \
++ _read_ret; \
++ })
++#else
++static inline u32 omap_des_read(struct omap_des_dev *dd, u32 offset)
++{
++ return __raw_readl(dd->io_base + offset);
++}
++#endif
++
++#ifdef DEBUG
++#define omap_des_write(dd, offset, value) \
++ do { \
++ pr_err("omap_des_write(" #offset "=%#x) value=%#x\n", \
++ offset, value); \
++ __raw_writel(value, dd->io_base + offset); \
++ } while (0)
++#else
++static inline void omap_des_write(struct omap_des_dev *dd, u32 offset,
++ u32 value)
++{
++ __raw_writel(value, dd->io_base + offset);
++}
++#endif
++
++static inline void omap_des_write_mask(struct omap_des_dev *dd, u32 offset,
++ u32 value, u32 mask)
++{
++ u32 val;
++
++ val = omap_des_read(dd, offset);
++ val &= ~mask;
++ val |= value;
++ omap_des_write(dd, offset, val);
++}
++
++static void omap_des_write_n(struct omap_des_dev *dd, u32 offset,
++ u32 *value, int count)
++{
++ for (; count--; value++, offset += 4)
++ omap_des_write(dd, offset, *value);
++}
++
++static int omap_des_hw_init(struct omap_des_dev *dd)
++{
++ /*
++ * clocks are enabled when request starts and disabled when finished.
++ * It may be long delays between requests.
++ * Device might go to off mode to save power.
++ */
++ pm_runtime_get_sync(dd->dev);
++
++ if (!(dd->flags & FLAGS_INIT)) {
++ dd->flags |= FLAGS_INIT;
++ dd->err = 0;
++ }
++
++ return 0;
++}
++
++static int omap_des_write_ctrl(struct omap_des_dev *dd)
++{
++ unsigned int key32;
++ int i, err;
++ u32 val = 0, mask = 0;
++
++ err = omap_des_hw_init(dd);
++ if (err)
++ return err;
++
++ key32 = dd->ctx->keylen / sizeof(u32);
++
++ /* it seems a key should always be set even if it has not changed */
++ for (i = 0; i < key32; i++) {
++ omap_des_write(dd, DES_REG_KEY(dd, i),
++ __le32_to_cpu(dd->ctx->key[i]));
++ }
++
++ if ((dd->flags & FLAGS_CBC) && dd->req->info)
++ omap_des_write_n(dd, DES_REG_IV(dd, 0), dd->req->info, 2);
++
++ if (dd->flags & FLAGS_CBC)
++ val |= DES_REG_CTRL_CBC;
++ if (dd->flags & FLAGS_ENCRYPT)
++ val |= DES_REG_CTRL_DIRECTION;
++
++ mask |= DES_REG_CTRL_CBC | DES_REG_CTRL_DIRECTION;
++
++ omap_des_write_mask(dd, DES_REG_CTRL(dd), val, mask);
++
++ return 0;
++}
++
++static void omap_des_dma_trigger_omap4(struct omap_des_dev *dd, int length)
++{
++ u32 mask, val;
++
++ omap_des_write(dd, DES_REG_LENGTH_N(0), length);
++
++ val = dd->pdata->dma_start;
++
++ if (dd->dma_lch_out != NULL)
++ val |= dd->pdata->dma_enable_out;
++ if (dd->dma_lch_in != NULL)
++ val |= dd->pdata->dma_enable_in;
++
++ mask = dd->pdata->dma_enable_out | dd->pdata->dma_enable_in |
++ dd->pdata->dma_start;
++
++ omap_des_write_mask(dd, DES_REG_MASK(dd), val, mask);
++}
++
++static void omap_des_dma_stop(struct omap_des_dev *dd)
++{
++ u32 mask;
++
++ mask = dd->pdata->dma_enable_out | dd->pdata->dma_enable_in |
++ dd->pdata->dma_start;
++
++ omap_des_write_mask(dd, DES_REG_MASK(dd), 0, mask);
++}
++
++static struct omap_des_dev *omap_des_find_dev(struct omap_des_ctx *ctx)
++{
++ struct omap_des_dev *dd = NULL, *tmp;
++
++ spin_lock_bh(&list_lock);
++ if (!ctx->dd) {
++ list_for_each_entry(tmp, &dev_list, list) {
++ /* FIXME: take fist available des core */
++ dd = tmp;
++ break;
++ }
++ ctx->dd = dd;
++ } else {
++ /* already found before */
++ dd = ctx->dd;
++ }
++ spin_unlock_bh(&list_lock);
++
++ return dd;
++}
++
++static void omap_des_dma_out_callback(void *data)
++{
++ struct omap_des_dev *dd = data;
++
++ /* dma_lch_out - completed */
++ tasklet_schedule(&dd->done_task);
++}
++
++static int omap_des_dma_init(struct omap_des_dev *dd)
++{
++ int err = -ENOMEM;
++ dma_cap_mask_t mask;
++
++ dd->dma_lch_out = NULL;
++ dd->dma_lch_in = NULL;
++
++ dma_cap_zero(mask);
++ dma_cap_set(DMA_SLAVE, mask);
++
++ dd->dma_lch_in = dma_request_slave_channel_compat(mask,
++ omap_dma_filter_fn,
++ &dd->dma_in,
++ dd->dev, "rx");
++ if (!dd->dma_lch_in) {
++ dev_err(dd->dev, "Unable to request in DMA channel\n");
++ goto err_dma_in;
++ }
++
++ dd->dma_lch_out = dma_request_slave_channel_compat(mask,
++ omap_dma_filter_fn,
++ &dd->dma_out,
++ dd->dev, "tx");
++ if (!dd->dma_lch_out) {
++ dev_err(dd->dev, "Unable to request out DMA channel\n");
++ goto err_dma_out;
++ }
++
++ return 0;
++
++err_dma_out:
++ dma_release_channel(dd->dma_lch_in);
++err_dma_in:
++ if (err)
++ pr_err("error: %d\n", err);
++ return err;
++}
++
++static void omap_des_dma_cleanup(struct omap_des_dev *dd)
++{
++ dma_release_channel(dd->dma_lch_out);
++ dma_release_channel(dd->dma_lch_in);
++}
++
++static void sg_copy_buf(void *buf, struct scatterlist *sg,
++ unsigned int start, unsigned int nbytes, int out)
++{
++ struct scatter_walk walk;
++
++ if (!nbytes)
++ return;
++
++ scatterwalk_start(&walk, sg);
++ scatterwalk_advance(&walk, start);
++ scatterwalk_copychunks(buf, &walk, nbytes, out);
++ scatterwalk_done(&walk, out, 0);
++}
++
++static int omap_des_crypt_dma(struct crypto_tfm *tfm,
++ struct scatterlist *in_sg, struct scatterlist *out_sg,
++ int in_sg_len, int out_sg_len)
++{
++ struct omap_des_ctx *ctx = crypto_tfm_ctx(tfm);
++ struct omap_des_dev *dd = ctx->dd;
++ struct dma_async_tx_descriptor *tx_in, *tx_out;
++ struct dma_slave_config cfg;
++ int ret;
++
++ if (dd->pio_only) {
++ scatterwalk_start(&dd->in_walk, dd->in_sg);
++ scatterwalk_start(&dd->out_walk, dd->out_sg);
++
++ /* Enable DATAIN interrupt and let it take
++ care of the rest */
++ omap_des_write(dd, DES_REG_IRQ_ENABLE(dd), 0x2);
++ return 0;
++ }
++
++ dma_sync_sg_for_device(dd->dev, dd->in_sg, in_sg_len, DMA_TO_DEVICE);
++
++ memset(&cfg, 0, sizeof(cfg));
++
++ cfg.src_addr = dd->phys_base + DES_REG_DATA_N(dd, 0);
++ cfg.dst_addr = dd->phys_base + DES_REG_DATA_N(dd, 0);
++ cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
++ cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
++ cfg.src_maxburst = DST_MAXBURST;
++ cfg.dst_maxburst = DST_MAXBURST;
++
++ /* IN */
++ ret = dmaengine_slave_config(dd->dma_lch_in, &cfg);
++ if (ret) {
++ dev_err(dd->dev, "can't configure IN dmaengine slave: %d\n",
++ ret);
++ return ret;
++ }
++
++ tx_in = dmaengine_prep_slave_sg(dd->dma_lch_in, in_sg, in_sg_len,
++ DMA_MEM_TO_DEV,
++ DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
++ if (!tx_in) {
++ dev_err(dd->dev, "IN prep_slave_sg() failed\n");
++ return -EINVAL;
++ }
++
++ /* No callback necessary */
++ tx_in->callback_param = dd;
++
++ /* OUT */
++ ret = dmaengine_slave_config(dd->dma_lch_out, &cfg);
++ if (ret) {
++ dev_err(dd->dev, "can't configure OUT dmaengine slave: %d\n",
++ ret);
++ return ret;
++ }
++
++ tx_out = dmaengine_prep_slave_sg(dd->dma_lch_out, out_sg, out_sg_len,
++ DMA_DEV_TO_MEM,
++ DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
++ if (!tx_out) {
++ dev_err(dd->dev, "OUT prep_slave_sg() failed\n");
++ return -EINVAL;
++ }
++
++ tx_out->callback = omap_des_dma_out_callback;
++ tx_out->callback_param = dd;
++
++ dmaengine_submit(tx_in);
++ dmaengine_submit(tx_out);
++
++ dma_async_issue_pending(dd->dma_lch_in);
++ dma_async_issue_pending(dd->dma_lch_out);
++
++ /* start DMA */
++ dd->pdata->trigger(dd, dd->total);
++
++ return 0;
++}
++
++static int omap_des_crypt_dma_start(struct omap_des_dev *dd)
++{
++ struct crypto_tfm *tfm = crypto_ablkcipher_tfm(
++ crypto_ablkcipher_reqtfm(dd->req));
++ int err;
++
++ pr_debug("total: %d\n", dd->total);
++
++ if (!dd->pio_only) {
++ err = dma_map_sg(dd->dev, dd->in_sg, dd->in_sg_len,
++ DMA_TO_DEVICE);
++ if (!err) {
++ dev_err(dd->dev, "dma_map_sg() error\n");
++ return -EINVAL;
++ }
++
++ err = dma_map_sg(dd->dev, dd->out_sg, dd->out_sg_len,
++ DMA_FROM_DEVICE);
++ if (!err) {
++ dev_err(dd->dev, "dma_map_sg() error\n");
++ return -EINVAL;
++ }
++ }
++
++ err = omap_des_crypt_dma(tfm, dd->in_sg, dd->out_sg, dd->in_sg_len,
++ dd->out_sg_len);
++ if (err && !dd->pio_only) {
++ dma_unmap_sg(dd->dev, dd->in_sg, dd->in_sg_len, DMA_TO_DEVICE);
++ dma_unmap_sg(dd->dev, dd->out_sg, dd->out_sg_len,
++ DMA_FROM_DEVICE);
++ }
++
++ return err;
++}
++
++static void omap_des_finish_req(struct omap_des_dev *dd, int err)
++{
++ struct ablkcipher_request *req = dd->req;
++
++ pr_debug("err: %d\n", err);
++
++ pm_runtime_put(dd->dev);
++ dd->flags &= ~FLAGS_BUSY;
++
++ req->base.complete(&req->base, err);
++}
++
++static int omap_des_crypt_dma_stop(struct omap_des_dev *dd)
++{
++ int err = 0;
++
++ pr_debug("total: %d\n", dd->total);
++
++ omap_des_dma_stop(dd);
++
++ dmaengine_terminate_all(dd->dma_lch_in);
++ dmaengine_terminate_all(dd->dma_lch_out);
++
++ dma_unmap_sg(dd->dev, dd->in_sg, dd->in_sg_len, DMA_TO_DEVICE);
++ dma_unmap_sg(dd->dev, dd->out_sg, dd->out_sg_len, DMA_FROM_DEVICE);
++
++ return err;
++}
++
++int omap_des_copy_needed(struct scatterlist *sg)
++{
++ while (sg) {
++ if (!IS_ALIGNED(sg->offset, 4))
++ return -1;
++ if (!IS_ALIGNED(sg->length, DES_BLOCK_SIZE))
++ return -1;
++ sg = sg_next(sg);
++ }
++ return 0;
++}
++
++int omap_des_copy_sgs(struct omap_des_dev *dd)
++{
++ void *buf_in, *buf_out;
++ int pages;
++
++ pages = dd->total >> PAGE_SHIFT;
++
++ if (dd->total & (PAGE_SIZE-1))
++ pages++;
++
++ BUG_ON(!pages);
++
++ buf_in = (void *)__get_free_pages(GFP_ATOMIC, pages);
++ buf_out = (void *)__get_free_pages(GFP_ATOMIC, pages);
++
++ if (!buf_in || !buf_out) {
++ pr_err("Couldn't allocated pages for unaligned cases.\n");
++ return -1;
++ }
++
++ dd->orig_out = dd->out_sg;
++
++ sg_copy_buf(buf_in, dd->in_sg, 0, dd->total, 0);
++
++ sg_init_table(&dd->in_sgl, 1);
++ sg_set_buf(&dd->in_sgl, buf_in, dd->total);
++ dd->in_sg = &dd->in_sgl;
++
++ sg_init_table(&dd->out_sgl, 1);
++ sg_set_buf(&dd->out_sgl, buf_out, dd->total);
++ dd->out_sg = &dd->out_sgl;
++
++ return 0;
++}
++
++static int omap_des_handle_queue(struct omap_des_dev *dd,
++ struct ablkcipher_request *req)
++{
++ struct crypto_async_request *async_req, *backlog;
++ struct omap_des_ctx *ctx;
++ struct omap_des_reqctx *rctx;
++ unsigned long flags;
++ int err, ret = 0;
++
++ spin_lock_irqsave(&dd->lock, flags);
++ if (req)
++ ret = ablkcipher_enqueue_request(&dd->queue, req);
++ if (dd->flags & FLAGS_BUSY) {
++ spin_unlock_irqrestore(&dd->lock, flags);
++ return ret;
++ }
++ backlog = crypto_get_backlog(&dd->queue);
++ async_req = crypto_dequeue_request(&dd->queue);
++ if (async_req)
++ dd->flags |= FLAGS_BUSY;
++ spin_unlock_irqrestore(&dd->lock, flags);
++
++ if (!async_req)
++ return ret;
++
++ if (backlog)
++ backlog->complete(backlog, -EINPROGRESS);
++
++ req = ablkcipher_request_cast(async_req);
++
++ /* assign new request to device */
++ dd->req = req;
++ dd->total = req->nbytes;
++ dd->total_save = req->nbytes;
++ dd->in_sg = req->src;
++ dd->out_sg = req->dst;
++
++ if (omap_des_copy_needed(dd->in_sg) ||
++ omap_des_copy_needed(dd->out_sg)) {
++ if (omap_des_copy_sgs(dd))
++ pr_err("Failed to copy SGs for unaligned cases\n");
++ dd->sgs_copied = 1;
++ } else {
++ dd->sgs_copied = 0;
++ }
++
++ dd->in_sg_len = scatterwalk_bytes_sglen(dd->in_sg, dd->total);
++ dd->out_sg_len = scatterwalk_bytes_sglen(dd->out_sg, dd->total);
++ BUG_ON(dd->in_sg_len < 0 || dd->out_sg_len < 0);
++
++ rctx = ablkcipher_request_ctx(req);
++ ctx = crypto_ablkcipher_ctx(crypto_ablkcipher_reqtfm(req));
++ rctx->mode &= FLAGS_MODE_MASK;
++ dd->flags = (dd->flags & ~FLAGS_MODE_MASK) | rctx->mode;
++
++ dd->ctx = ctx;
++ ctx->dd = dd;
++
++ err = omap_des_write_ctrl(dd);
++ if (!err)
++ err = omap_des_crypt_dma_start(dd);
++ if (err) {
++ /* des_task will not finish it, so do it here */
++ omap_des_finish_req(dd, err);
++ tasklet_schedule(&dd->queue_task);
++ }
++
++ return ret; /* return ret, which is enqueue return value */
++}
++
++static void omap_des_done_task(unsigned long data)
++{
++ struct omap_des_dev *dd = (struct omap_des_dev *)data;
++ void *buf_in, *buf_out;
++ int pages;
++
++ pr_debug("enter done_task\n");
++
++ if (!dd->pio_only) {
++ dma_sync_sg_for_device(dd->dev, dd->out_sg, dd->out_sg_len,
++ DMA_FROM_DEVICE);
++ dma_unmap_sg(dd->dev, dd->in_sg, dd->in_sg_len, DMA_TO_DEVICE);
++ dma_unmap_sg(dd->dev, dd->out_sg, dd->out_sg_len,
++ DMA_FROM_DEVICE);
++ omap_des_crypt_dma_stop(dd);
++ }
++
++ if (dd->sgs_copied) {
++ buf_in = sg_virt(&dd->in_sgl);
++ buf_out = sg_virt(&dd->out_sgl);
++
++ sg_copy_buf(buf_out, dd->orig_out, 0, dd->total_save, 1);
++
++ pages = get_order(dd->total_save);
++ free_pages((unsigned long)buf_in, pages);
++ free_pages((unsigned long)buf_out, pages);
++ }
++
++ omap_des_finish_req(dd, 0);
++ omap_des_handle_queue(dd, NULL);
++
++ pr_debug("exit\n");
++}
++
++static void omap_des_queue_task(unsigned long data)
++{
++ struct omap_des_dev *dd = (struct omap_des_dev *)data;
++
++ omap_des_handle_queue(dd, NULL);
++}
++
++static int omap_des_crypt(struct ablkcipher_request *req, unsigned long mode)
++{
++ struct omap_des_ctx *ctx = crypto_ablkcipher_ctx(
++ crypto_ablkcipher_reqtfm(req));
++ struct omap_des_reqctx *rctx = ablkcipher_request_ctx(req);
++ struct omap_des_dev *dd;
++
++ pr_debug("nbytes: %d, enc: %d, cbc: %d\n", req->nbytes,
++ !!(mode & FLAGS_ENCRYPT),
++ !!(mode & FLAGS_CBC));
++
++ if (!IS_ALIGNED(req->nbytes, DES_BLOCK_SIZE)) {
++ pr_err("request size is not exact amount of DES blocks\n");
++ return -EINVAL;
++ }
++
++ dd = omap_des_find_dev(ctx);
++ if (!dd)
++ return -ENODEV;
++
++ rctx->mode = mode;
++
++ return omap_des_handle_queue(dd, req);
++}
++
++/* ********************** ALG API ************************************ */
++
++static int omap_des_setkey(struct crypto_ablkcipher *tfm, const u8 *key,
++ unsigned int keylen)
++{
++ struct omap_des_ctx *ctx = crypto_ablkcipher_ctx(tfm);
++
++ if (keylen != DES_KEY_SIZE)
++ return -EINVAL;
++
++ pr_debug("enter, keylen: %d\n", keylen);
++
++ memcpy(ctx->key, key, keylen);
++ ctx->keylen = keylen;
++
++ return 0;
++}
++
++static int omap_des_ecb_encrypt(struct ablkcipher_request *req)
++{
++ return omap_des_crypt(req, FLAGS_ENCRYPT);
++}
++
++static int omap_des_ecb_decrypt(struct ablkcipher_request *req)
++{
++ return omap_des_crypt(req, 0);
++}
++
++static int omap_des_cbc_encrypt(struct ablkcipher_request *req)
++{
++ return omap_des_crypt(req, FLAGS_ENCRYPT | FLAGS_CBC);
++}
++
++static int omap_des_cbc_decrypt(struct ablkcipher_request *req)
++{
++ return omap_des_crypt(req, FLAGS_CBC);
++}
++
++static int omap_des_cra_init(struct crypto_tfm *tfm)
++{
++ pr_debug("enter\n");
++
++ tfm->crt_ablkcipher.reqsize = sizeof(struct omap_des_reqctx);
++
++ return 0;
++}
++
++static void omap_des_cra_exit(struct crypto_tfm *tfm)
++{
++ pr_debug("enter\n");
++}
++
++/* ********************** ALGS ************************************ */
++
++static struct crypto_alg algs_ecb_cbc[] = {
++{
++ .cra_name = "ecb(des)",
++ .cra_driver_name = "ecb-des-omap",
++ .cra_priority = 100,
++ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
++ CRYPTO_ALG_KERN_DRIVER_ONLY |
++ CRYPTO_ALG_ASYNC,
++ .cra_blocksize = DES_BLOCK_SIZE,
++ .cra_ctxsize = sizeof(struct omap_des_ctx),
++ .cra_alignmask = 0,
++ .cra_type = &crypto_ablkcipher_type,
++ .cra_module = THIS_MODULE,
++ .cra_init = omap_des_cra_init,
++ .cra_exit = omap_des_cra_exit,
++ .cra_u.ablkcipher = {
++ .min_keysize = DES_KEY_SIZE,
++ .max_keysize = DES_KEY_SIZE,
++ .setkey = omap_des_setkey,
++ .encrypt = omap_des_ecb_encrypt,
++ .decrypt = omap_des_ecb_decrypt,
++ }
++},
++{
++ .cra_name = "cbc(des)",
++ .cra_driver_name = "cbc-des-omap",
++ .cra_priority = 100,
++ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
++ CRYPTO_ALG_KERN_DRIVER_ONLY |
++ CRYPTO_ALG_ASYNC,
++ .cra_blocksize = DES_BLOCK_SIZE,
++ .cra_ctxsize = sizeof(struct omap_des_ctx),
++ .cra_alignmask = 0,
++ .cra_type = &crypto_ablkcipher_type,
++ .cra_module = THIS_MODULE,
++ .cra_init = omap_des_cra_init,
++ .cra_exit = omap_des_cra_exit,
++ .cra_u.ablkcipher = {
++ .min_keysize = DES_KEY_SIZE,
++ .max_keysize = DES_KEY_SIZE,
++ .ivsize = DES_BLOCK_SIZE,
++ .setkey = omap_des_setkey,
++ .encrypt = omap_des_cbc_encrypt,
++ .decrypt = omap_des_cbc_decrypt,
++ }
++}
++};
++
++static struct omap_des_algs_info omap_des_algs_info_ecb_cbc[] = {
++ {
++ .algs_list = algs_ecb_cbc,
++ .size = ARRAY_SIZE(algs_ecb_cbc),
++ },
++};
++
++#ifdef CONFIG_OF
++static const struct omap_des_pdata omap_des_pdata_omap4 = {
++ .algs_info = omap_des_algs_info_ecb_cbc,
++ .algs_info_size = ARRAY_SIZE(omap_des_algs_info_ecb_cbc),
++ .trigger = omap_des_dma_trigger_omap4,
++ .key_ofs = 0x14,
++ .iv_ofs = 0x18,
++ .ctrl_ofs = 0x20,
++ .data_ofs = 0x28,
++ .rev_ofs = 0x30,
++ .mask_ofs = 0x34,
++ .irq_status_ofs = 0x3c,
++ .irq_enable_ofs = 0x40,
++ .dma_enable_in = BIT(5),
++ .dma_enable_out = BIT(6),
++ .major_mask = 0x0700,
++ .major_shift = 8,
++ .minor_mask = 0x003f,
++ .minor_shift = 0,
++};
++
++static irqreturn_t omap_des_irq(int irq, void *dev_id)
++{
++ struct omap_des_dev *dd = dev_id;
++ u32 status, i;
++ u32 *src, *dst;
++
++ status = omap_des_read(dd, DES_REG_IRQ_STATUS(dd));
++ if (status & DES_REG_IRQ_DATA_IN) {
++ omap_des_write(dd, DES_REG_IRQ_ENABLE(dd), 0x0);
++
++ BUG_ON(!dd->in_sg);
++
++ BUG_ON(_calc_walked(in) > dd->in_sg->length);
++
++ src = sg_virt(dd->in_sg) + _calc_walked(in);
++
++ for (i = 0; i < DES_BLOCK_WORDS; i++) {
++ omap_des_write(dd, DES_REG_DATA_N(dd, i), *src);
++
++ scatterwalk_advance(&dd->in_walk, 4);
++ if (dd->in_sg->length == _calc_walked(in)) {
++ dd->in_sg = scatterwalk_sg_next(dd->in_sg);
++ if (dd->in_sg) {
++ scatterwalk_start(&dd->in_walk,
++ dd->in_sg);
++ src = sg_virt(dd->in_sg) +
++ _calc_walked(in);
++ }
++ } else {
++ src++;
++ }
++ }
++
++ /* Clear IRQ status */
++ status &= ~DES_REG_IRQ_DATA_IN;
++ omap_des_write(dd, DES_REG_IRQ_STATUS(dd), status);
++
++ /* Enable DATA_OUT interrupt */
++ omap_des_write(dd, DES_REG_IRQ_ENABLE(dd), 0x4);
++
++ } else if (status & DES_REG_IRQ_DATA_OUT) {
++ omap_des_write(dd, DES_REG_IRQ_ENABLE(dd), 0x0);
++
++ BUG_ON(!dd->out_sg);
++
++ BUG_ON(_calc_walked(out) > dd->out_sg->length);
++
++ dst = sg_virt(dd->out_sg) + _calc_walked(out);
++
++ for (i = 0; i < DES_BLOCK_WORDS; i++) {
++ *dst = omap_des_read(dd, DES_REG_DATA_N(dd, i));
++ scatterwalk_advance(&dd->out_walk, 4);
++ if (dd->out_sg->length == _calc_walked(out)) {
++ dd->out_sg = scatterwalk_sg_next(dd->out_sg);
++ if (dd->out_sg) {
++ scatterwalk_start(&dd->out_walk,
++ dd->out_sg);
++ dst = sg_virt(dd->out_sg) +
++ _calc_walked(out);
++ }
++ } else {
++ dst++;
++ }
++ }
++
++ dd->total -= DES_BLOCK_SIZE;
++
++ BUG_ON(dd->total < 0);
++
++ /* Clear IRQ status */
++ status &= ~DES_REG_IRQ_DATA_OUT;
++ omap_des_write(dd, DES_REG_IRQ_STATUS(dd), status);
++
++ if (!dd->total)
++ /* All bytes read! */
++ tasklet_schedule(&dd->done_task);
++ else
++ /* Enable DATA_IN interrupt for next block */
++ omap_des_write(dd, DES_REG_IRQ_ENABLE(dd), 0x2);
++ }
++
++ return IRQ_HANDLED;
++}
++
++static const struct of_device_id omap_des_of_match[] = {
++ {
++ .compatible = "ti,omap4-des",
++ .data = &omap_des_pdata_omap4,
++ },
++ {},
++};
++MODULE_DEVICE_TABLE(of, omap_des_of_match);
++
++static int omap_des_get_res_of(struct omap_des_dev *dd,
++ struct device *dev, struct resource *res)
++{
++ struct device_node *node = dev->of_node;
++ const struct of_device_id *match;
++ int err = 0;
++
++ match = of_match_device(of_match_ptr(omap_des_of_match), dev);
++ if (!match) {
++ dev_err(dev, "no compatible OF match\n");
++ err = -EINVAL;
++ goto err;
++ }
++
++ err = of_address_to_resource(node, 0, res);
++ if (err < 0) {
++ dev_err(dev, "can't translate OF node address\n");
++ err = -EINVAL;
++ goto err;
++ }
++
++ dd->dma_out = -1; /* Dummy value that's unused */
++ dd->dma_in = -1; /* Dummy value that's unused */
++
++ dd->pdata = match->data;
++
++err:
++ return err;
++}
++#else
++static const struct of_device_id omap_des_of_match[] = {
++ {},
++};
++
++static int omap_des_get_res_of(struct omap_des_dev *dd,
++ struct device *dev, struct resource *res)
++{
++ return -EINVAL;
++}
++#endif
++
++static int omap_des_get_res_pdev(struct omap_des_dev *dd,
++ struct platform_device *pdev, struct resource *res)
++{
++ struct device *dev = &pdev->dev;
++ struct resource *r;
++ int err = 0;
++
++ /* Get the base address */
++ r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++ if (!r) {
++ dev_err(dev, "no MEM resource info\n");
++ err = -ENODEV;
++ goto err;
++ }
++ memcpy(res, r, sizeof(*res));
++
++ /* Get the DMA out channel */
++ r = platform_get_resource(pdev, IORESOURCE_DMA, 0);
++ if (!r) {
++ dev_err(dev, "no DMA out resource info\n");
++ err = -ENODEV;
++ goto err;
++ }
++ dd->dma_out = r->start;
++
++ /* Get the DMA in channel */
++ r = platform_get_resource(pdev, IORESOURCE_DMA, 1);
++ if (!r) {
++ dev_err(dev, "no DMA in resource info\n");
++ err = -ENODEV;
++ goto err;
++ }
++ dd->dma_in = r->start;
++
++ /* non-DT devices get pdata from pdev */
++ dd->pdata = pdev->dev.platform_data;
++
++err:
++ return err;
++}
++
++static int omap_des_probe(struct platform_device *pdev)
++{
++ struct device *dev = &pdev->dev;
++ struct omap_des_dev *dd;
++ struct crypto_alg *algp;
++ struct resource res;
++ int err = -ENOMEM, i, j, irq = -1;
++ u32 reg;
++
++ dd = devm_kzalloc(dev, sizeof(struct omap_des_dev), GFP_KERNEL);
++ if (dd == NULL) {
++ dev_err(dev, "unable to alloc data struct.\n");
++ goto err_data;
++ }
++ dd->dev = dev;
++ platform_set_drvdata(pdev, dd);
++
++ spin_lock_init(&dd->lock);
++ crypto_init_queue(&dd->queue, OMAP_DES_QUEUE_LENGTH);
++
++ err = (dev->of_node) ? omap_des_get_res_of(dd, dev, &res) :
++ omap_des_get_res_pdev(dd, pdev, &res);
++ if (err)
++ goto err_res;
++
++ dd->io_base = devm_request_and_ioremap(dev, &res);
++ if (!dd->io_base) {
++ dev_err(dev, "can't ioremap\n");
++ err = -ENOMEM;
++ goto err_res;
++ }
++ dd->phys_base = res.start;
++
++ pm_runtime_enable(dev);
++ pm_runtime_get_sync(dev);
++
++ omap_des_dma_stop(dd);
++
++ reg = omap_des_read(dd, DES_REG_REV(dd));
++
++ pm_runtime_put_sync(dev);
++
++ dev_info(dev, "OMAP DES hw accel rev: %u.%u\n",
++ (reg & dd->pdata->major_mask) >> dd->pdata->major_shift,
++ (reg & dd->pdata->minor_mask) >> dd->pdata->minor_shift);
++
++ tasklet_init(&dd->done_task, omap_des_done_task, (unsigned long)dd);
++ tasklet_init(&dd->queue_task, omap_des_queue_task, (unsigned long)dd);
++
++ err = omap_des_dma_init(dd);
++ if (err && DES_REG_IRQ_STATUS(dd) && DES_REG_IRQ_ENABLE(dd)) {
++ dd->pio_only = 1;
++
++ irq = platform_get_irq(pdev, 0);
++ if (irq < 0) {
++ dev_err(dev, "can't get IRQ resource\n");
++ goto err_irq;
++ }
++
++ err = devm_request_irq(dev, irq, omap_des_irq, 0,
++ dev_name(dev), dd);
++ if (err) {
++ dev_err(dev, "Unable to grab omap-des IRQ\n");
++ goto err_irq;
++ }
++ }
++
++
++ INIT_LIST_HEAD(&dd->list);
++ spin_lock(&list_lock);
++ list_add_tail(&dd->list, &dev_list);
++ spin_unlock(&list_lock);
++
++ for (i = 0; i < dd->pdata->algs_info_size; i++) {
++ for (j = 0; j < dd->pdata->algs_info[i].size; j++) {
++ algp = &dd->pdata->algs_info[i].algs_list[j];
++
++ pr_debug("reg alg: %s\n", algp->cra_name);
++ INIT_LIST_HEAD(&algp->cra_list);
++
++ err = crypto_register_alg(algp);
++ if (err)
++ goto err_algs;
++
++ dd->pdata->algs_info[i].registered++;
++ }
++ }
++
++ return 0;
++err_algs:
++ for (i = dd->pdata->algs_info_size - 1; i >= 0; i--)
++ for (j = dd->pdata->algs_info[i].registered - 1; j >= 0; j--)
++ crypto_unregister_alg(
++ &dd->pdata->algs_info[i].algs_list[j]);
++ if (!dd->pio_only)
++ omap_des_dma_cleanup(dd);
++err_irq:
++ tasklet_kill(&dd->done_task);
++ tasklet_kill(&dd->queue_task);
++ pm_runtime_disable(dev);
++err_res:
++ dd = NULL;
++err_data:
++ dev_err(dev, "initialization failed.\n");
++ return err;
++}
++
++static int omap_des_remove(struct platform_device *pdev)
++{
++ struct omap_des_dev *dd = platform_get_drvdata(pdev);
++ int i, j;
++
++ if (!dd)
++ return -ENODEV;
++
++ spin_lock(&list_lock);
++ list_del(&dd->list);
++ spin_unlock(&list_lock);
++
++ for (i = dd->pdata->algs_info_size - 1; i >= 0; i--)
++ for (j = dd->pdata->algs_info[i].registered - 1; j >= 0; j--)
++ crypto_unregister_alg(
++ &dd->pdata->algs_info[i].algs_list[j]);
++
++ tasklet_kill(&dd->done_task);
++ tasklet_kill(&dd->queue_task);
++ omap_des_dma_cleanup(dd);
++ pm_runtime_disable(dd->dev);
++ dd = NULL;
++
++ return 0;
++}
++
++#ifdef CONFIG_PM_SLEEP
++static int omap_des_suspend(struct device *dev)
++{
++ pm_runtime_put_sync(dev);
++ return 0;
++}
++
++static int omap_des_resume(struct device *dev)
++{
++ pm_runtime_get_sync(dev);
++ return 0;
++}
++#endif
++
++static const struct dev_pm_ops omap_des_pm_ops = {
++ SET_SYSTEM_SLEEP_PM_OPS(omap_des_suspend, omap_des_resume)
++};
++
++static struct platform_driver omap_des_driver = {
++ .probe = omap_des_probe,
++ .remove = omap_des_remove,
++ .driver = {
++ .name = "omap-des",
++ .owner = THIS_MODULE,
++ .pm = &omap_des_pm_ops,
++ .of_match_table = omap_des_of_match,
++ },
++};
++
++module_platform_driver(omap_des_driver);
++
++MODULE_DESCRIPTION("OMAP DES hw acceleration support.");
++MODULE_LICENSE("GPL v2");
++MODULE_AUTHOR("Joel Fernandes <joelf@ti.com>");
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-07 08:25:03 +0000