| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * Cryptographic API. |
| * |
| * Support for OMAP SHA1/MD5 HW acceleration. |
| * |
| * Copyright (c) 2010 Nokia Corporation |
| * Author: Dmitry Kasatkin <dmitry.kasatkin@nokia.com> |
| * Copyright (c) 2011 Texas Instruments Incorporated |
| * |
| * Some ideas are from old omap-sha1-md5.c driver. |
| */ |
| |
| #define pr_fmt(fmt) "%s: " fmt, __func__ |
| |
| #include <linux/err.h> |
| #include <linux/device.h> |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/errno.h> |
| #include <linux/interrupt.h> |
| #include <linux/kernel.h> |
| #include <linux/irq.h> |
| #include <linux/io.h> |
| #include <linux/platform_device.h> |
| #include <linux/scatterlist.h> |
| #include <linux/dma-mapping.h> |
| #include <linux/dmaengine.h> |
| #include <linux/pm_runtime.h> |
| #include <linux/of.h> |
| #include <linux/of_device.h> |
| #include <linux/of_address.h> |
| #include <linux/of_irq.h> |
| #include <linux/delay.h> |
| #include <linux/crypto.h> |
| #include <crypto/scatterwalk.h> |
| #include <crypto/algapi.h> |
| #include <crypto/sha.h> |
| #include <crypto/hash.h> |
| #include <crypto/hmac.h> |
| #include <crypto/internal/hash.h> |
| |
| #define MD5_DIGEST_SIZE 16 |
| |
| #define SHA_REG_IDIGEST(dd, x) ((dd)->pdata->idigest_ofs + ((x)*0x04)) |
| #define SHA_REG_DIN(dd, x) ((dd)->pdata->din_ofs + ((x) * 0x04)) |
| #define SHA_REG_DIGCNT(dd) ((dd)->pdata->digcnt_ofs) |
| |
| #define SHA_REG_ODIGEST(dd, x) ((dd)->pdata->odigest_ofs + (x * 0x04)) |
| |
| #define SHA_REG_CTRL 0x18 |
| #define SHA_REG_CTRL_LENGTH (0xFFFFFFFF << 5) |
| #define SHA_REG_CTRL_CLOSE_HASH (1 << 4) |
| #define SHA_REG_CTRL_ALGO_CONST (1 << 3) |
| #define SHA_REG_CTRL_ALGO (1 << 2) |
| #define SHA_REG_CTRL_INPUT_READY (1 << 1) |
| #define SHA_REG_CTRL_OUTPUT_READY (1 << 0) |
| |
| #define SHA_REG_REV(dd) ((dd)->pdata->rev_ofs) |
| |
| #define SHA_REG_MASK(dd) ((dd)->pdata->mask_ofs) |
| #define SHA_REG_MASK_DMA_EN (1 << 3) |
| #define SHA_REG_MASK_IT_EN (1 << 2) |
| #define SHA_REG_MASK_SOFTRESET (1 << 1) |
| #define SHA_REG_AUTOIDLE (1 << 0) |
| |
| #define SHA_REG_SYSSTATUS(dd) ((dd)->pdata->sysstatus_ofs) |
| #define SHA_REG_SYSSTATUS_RESETDONE (1 << 0) |
| |
| #define SHA_REG_MODE(dd) ((dd)->pdata->mode_ofs) |
| #define SHA_REG_MODE_HMAC_OUTER_HASH (1 << 7) |
| #define SHA_REG_MODE_HMAC_KEY_PROC (1 << 5) |
| #define SHA_REG_MODE_CLOSE_HASH (1 << 4) |
| #define SHA_REG_MODE_ALGO_CONSTANT (1 << 3) |
| |
| #define SHA_REG_MODE_ALGO_MASK (7 << 0) |
| #define SHA_REG_MODE_ALGO_MD5_128 (0 << 1) |
| #define SHA_REG_MODE_ALGO_SHA1_160 (1 << 1) |
| #define SHA_REG_MODE_ALGO_SHA2_224 (2 << 1) |
| #define SHA_REG_MODE_ALGO_SHA2_256 (3 << 1) |
| #define SHA_REG_MODE_ALGO_SHA2_384 (1 << 0) |
| #define SHA_REG_MODE_ALGO_SHA2_512 (3 << 0) |
| |
| #define SHA_REG_LENGTH(dd) ((dd)->pdata->length_ofs) |
| |
| #define SHA_REG_IRQSTATUS 0x118 |
| #define SHA_REG_IRQSTATUS_CTX_RDY (1 << 3) |
| #define SHA_REG_IRQSTATUS_PARTHASH_RDY (1 << 2) |
| #define SHA_REG_IRQSTATUS_INPUT_RDY (1 << 1) |
| #define SHA_REG_IRQSTATUS_OUTPUT_RDY (1 << 0) |
| |
| #define SHA_REG_IRQENA 0x11C |
| #define SHA_REG_IRQENA_CTX_RDY (1 << 3) |
| #define SHA_REG_IRQENA_PARTHASH_RDY (1 << 2) |
| #define SHA_REG_IRQENA_INPUT_RDY (1 << 1) |
| #define SHA_REG_IRQENA_OUTPUT_RDY (1 << 0) |
| |
| #define DEFAULT_TIMEOUT_INTERVAL HZ |
| |
| #define DEFAULT_AUTOSUSPEND_DELAY 1000 |
| |
| /* mostly device flags */ |
| #define FLAGS_BUSY 0 |
| #define FLAGS_FINAL 1 |
| #define FLAGS_DMA_ACTIVE 2 |
| #define FLAGS_OUTPUT_READY 3 |
| #define FLAGS_INIT 4 |
| #define FLAGS_CPU 5 |
| #define FLAGS_DMA_READY 6 |
| #define FLAGS_AUTO_XOR 7 |
| #define FLAGS_BE32_SHA1 8 |
| #define FLAGS_SGS_COPIED 9 |
| #define FLAGS_SGS_ALLOCED 10 |
| #define FLAGS_HUGE 11 |
| |
| /* context flags */ |
| #define FLAGS_FINUP 16 |
| |
| #define FLAGS_MODE_SHIFT 18 |
| #define FLAGS_MODE_MASK (SHA_REG_MODE_ALGO_MASK << FLAGS_MODE_SHIFT) |
| #define FLAGS_MODE_MD5 (SHA_REG_MODE_ALGO_MD5_128 << FLAGS_MODE_SHIFT) |
| #define FLAGS_MODE_SHA1 (SHA_REG_MODE_ALGO_SHA1_160 << FLAGS_MODE_SHIFT) |
| #define FLAGS_MODE_SHA224 (SHA_REG_MODE_ALGO_SHA2_224 << FLAGS_MODE_SHIFT) |
| #define FLAGS_MODE_SHA256 (SHA_REG_MODE_ALGO_SHA2_256 << FLAGS_MODE_SHIFT) |
| #define FLAGS_MODE_SHA384 (SHA_REG_MODE_ALGO_SHA2_384 << FLAGS_MODE_SHIFT) |
| #define FLAGS_MODE_SHA512 (SHA_REG_MODE_ALGO_SHA2_512 << FLAGS_MODE_SHIFT) |
| |
| #define FLAGS_HMAC 21 |
| #define FLAGS_ERROR 22 |
| |
| #define OP_UPDATE 1 |
| #define OP_FINAL 2 |
| |
| #define OMAP_ALIGN_MASK (sizeof(u32)-1) |
| #define OMAP_ALIGNED __attribute__((aligned(sizeof(u32)))) |
| |
| #define BUFLEN SHA512_BLOCK_SIZE |
| #define OMAP_SHA_DMA_THRESHOLD 256 |
| |
| #define OMAP_SHA_MAX_DMA_LEN (1024 * 2048) |
| |
| struct omap_sham_dev; |
| |
| struct omap_sham_reqctx { |
| struct omap_sham_dev *dd; |
| unsigned long flags; |
| unsigned long op; |
| |
| u8 digest[SHA512_DIGEST_SIZE] OMAP_ALIGNED; |
| size_t digcnt; |
| size_t bufcnt; |
| size_t buflen; |
| |
| /* walk state */ |
| struct scatterlist *sg; |
| struct scatterlist sgl[2]; |
| int offset; /* offset in current sg */ |
| int sg_len; |
| unsigned int total; /* total request */ |
| |
| u8 buffer[] OMAP_ALIGNED; |
| }; |
| |
| struct omap_sham_hmac_ctx { |
| struct crypto_shash *shash; |
| u8 ipad[SHA512_BLOCK_SIZE] OMAP_ALIGNED; |
| u8 opad[SHA512_BLOCK_SIZE] OMAP_ALIGNED; |
| }; |
| |
| struct omap_sham_ctx { |
| struct omap_sham_dev *dd; |
| |
| unsigned long flags; |
| |
| /* fallback stuff */ |
| struct crypto_shash *fallback; |
| |
| struct omap_sham_hmac_ctx base[]; |
| }; |
| |
| #define OMAP_SHAM_QUEUE_LENGTH 10 |
| |
| struct omap_sham_algs_info { |
| struct ahash_alg *algs_list; |
| unsigned int size; |
| unsigned int registered; |
| }; |
| |
| struct omap_sham_pdata { |
| struct omap_sham_algs_info *algs_info; |
| unsigned int algs_info_size; |
| unsigned long flags; |
| int digest_size; |
| |
| void (*copy_hash)(struct ahash_request *req, int out); |
| void (*write_ctrl)(struct omap_sham_dev *dd, size_t length, |
| int final, int dma); |
| void (*trigger)(struct omap_sham_dev *dd, size_t length); |
| int (*poll_irq)(struct omap_sham_dev *dd); |
| irqreturn_t (*intr_hdlr)(int irq, void *dev_id); |
| |
| u32 odigest_ofs; |
| u32 idigest_ofs; |
| u32 din_ofs; |
| u32 digcnt_ofs; |
| u32 rev_ofs; |
| u32 mask_ofs; |
| u32 sysstatus_ofs; |
| u32 mode_ofs; |
| u32 length_ofs; |
| |
| u32 major_mask; |
| u32 major_shift; |
| u32 minor_mask; |
| u32 minor_shift; |
| }; |
| |
| struct omap_sham_dev { |
| struct list_head list; |
| unsigned long phys_base; |
| struct device *dev; |
| void __iomem *io_base; |
| int irq; |
| spinlock_t lock; |
| int err; |
| struct dma_chan *dma_lch; |
| struct tasklet_struct done_task; |
| u8 polling_mode; |
| u8 xmit_buf[BUFLEN] OMAP_ALIGNED; |
| |
| unsigned long flags; |
| int fallback_sz; |
| struct crypto_queue queue; |
| struct ahash_request *req; |
| |
| const struct omap_sham_pdata *pdata; |
| }; |
| |
| struct omap_sham_drv { |
| struct list_head dev_list; |
| spinlock_t lock; |
| unsigned long flags; |
| }; |
| |
| static struct omap_sham_drv sham = { |
| .dev_list = LIST_HEAD_INIT(sham.dev_list), |
| .lock = __SPIN_LOCK_UNLOCKED(sham.lock), |
| }; |
| |
| static inline u32 omap_sham_read(struct omap_sham_dev *dd, u32 offset) |
| { |
| return __raw_readl(dd->io_base + offset); |
| } |
| |
| static inline void omap_sham_write(struct omap_sham_dev *dd, |
| u32 offset, u32 value) |
| { |
| __raw_writel(value, dd->io_base + offset); |
| } |
| |
| static inline void omap_sham_write_mask(struct omap_sham_dev *dd, u32 address, |
| u32 value, u32 mask) |
| { |
| u32 val; |
| |
| val = omap_sham_read(dd, address); |
| val &= ~mask; |
| val |= value; |
| omap_sham_write(dd, address, val); |
| } |
| |
| static inline int omap_sham_wait(struct omap_sham_dev *dd, u32 offset, u32 bit) |
| { |
| unsigned long timeout = jiffies + DEFAULT_TIMEOUT_INTERVAL; |
| |
| while (!(omap_sham_read(dd, offset) & bit)) { |
| if (time_is_before_jiffies(timeout)) |
| return -ETIMEDOUT; |
| } |
| |
| return 0; |
| } |
| |
| static void omap_sham_copy_hash_omap2(struct ahash_request *req, int out) |
| { |
| struct omap_sham_reqctx *ctx = ahash_request_ctx(req); |
| struct omap_sham_dev *dd = ctx->dd; |
| u32 *hash = (u32 *)ctx->digest; |
| int i; |
| |
| for (i = 0; i < dd->pdata->digest_size / sizeof(u32); i++) { |
| if (out) |
| hash[i] = omap_sham_read(dd, SHA_REG_IDIGEST(dd, i)); |
| else |
| omap_sham_write(dd, SHA_REG_IDIGEST(dd, i), hash[i]); |
| } |
| } |
| |
| static void omap_sham_copy_hash_omap4(struct ahash_request *req, int out) |
| { |
| struct omap_sham_reqctx *ctx = ahash_request_ctx(req); |
| struct omap_sham_dev *dd = ctx->dd; |
| int i; |
| |
| if (ctx->flags & BIT(FLAGS_HMAC)) { |
| struct crypto_ahash *tfm = crypto_ahash_reqtfm(dd->req); |
| struct omap_sham_ctx *tctx = crypto_ahash_ctx(tfm); |
| struct omap_sham_hmac_ctx *bctx = tctx->base; |
| u32 *opad = (u32 *)bctx->opad; |
| |
| for (i = 0; i < dd->pdata->digest_size / sizeof(u32); i++) { |
| if (out) |
| opad[i] = omap_sham_read(dd, |
| SHA_REG_ODIGEST(dd, i)); |
| else |
| omap_sham_write(dd, SHA_REG_ODIGEST(dd, i), |
| opad[i]); |
| } |
| } |
| |
| omap_sham_copy_hash_omap2(req, out); |
| } |
| |
| static void omap_sham_copy_ready_hash(struct ahash_request *req) |
| { |
| struct omap_sham_reqctx *ctx = ahash_request_ctx(req); |
| u32 *in = (u32 *)ctx->digest; |
| u32 *hash = (u32 *)req->result; |
| int i, d, big_endian = 0; |
| |
| if (!hash) |
| return; |
| |
| switch (ctx->flags & FLAGS_MODE_MASK) { |
| case FLAGS_MODE_MD5: |
| d = MD5_DIGEST_SIZE / sizeof(u32); |
| break; |
| case FLAGS_MODE_SHA1: |
| /* OMAP2 SHA1 is big endian */ |
| if (test_bit(FLAGS_BE32_SHA1, &ctx->dd->flags)) |
| big_endian = 1; |
| d = SHA1_DIGEST_SIZE / sizeof(u32); |
| break; |
| case FLAGS_MODE_SHA224: |
| d = SHA224_DIGEST_SIZE / sizeof(u32); |
| break; |
| case FLAGS_MODE_SHA256: |
| d = SHA256_DIGEST_SIZE / sizeof(u32); |
| break; |
| case FLAGS_MODE_SHA384: |
| d = SHA384_DIGEST_SIZE / sizeof(u32); |
| break; |
| case FLAGS_MODE_SHA512: |
| d = SHA512_DIGEST_SIZE / sizeof(u32); |
| break; |
| default: |
| d = 0; |
| } |
| |
| if (big_endian) |
| for (i = 0; i < d; i++) |
| hash[i] = be32_to_cpu(in[i]); |
| else |
| for (i = 0; i < d; i++) |
| hash[i] = le32_to_cpu(in[i]); |
| } |
| |
| static int omap_sham_hw_init(struct omap_sham_dev *dd) |
| { |
| int err; |
| |
| err = pm_runtime_get_sync(dd->dev); |
| if (err < 0) { |
| dev_err(dd->dev, "failed to get sync: %d\n", err); |
| return err; |
| } |
| |
| if (!test_bit(FLAGS_INIT, &dd->flags)) { |
| set_bit(FLAGS_INIT, &dd->flags); |
| dd->err = 0; |
| } |
| |
| return 0; |
| } |
| |
| static void omap_sham_write_ctrl_omap2(struct omap_sham_dev *dd, size_t length, |
| int final, int dma) |
| { |
| struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req); |
| u32 val = length << 5, mask; |
| |
| if (likely(ctx->digcnt)) |
| omap_sham_write(dd, SHA_REG_DIGCNT(dd), ctx->digcnt); |
| |
| omap_sham_write_mask(dd, SHA_REG_MASK(dd), |
| SHA_REG_MASK_IT_EN | (dma ? SHA_REG_MASK_DMA_EN : 0), |
| SHA_REG_MASK_IT_EN | SHA_REG_MASK_DMA_EN); |
| /* |
| * Setting ALGO_CONST only for the first iteration |
| * and CLOSE_HASH only for the last one. |
| */ |
| if ((ctx->flags & FLAGS_MODE_MASK) == FLAGS_MODE_SHA1) |
| val |= SHA_REG_CTRL_ALGO; |
| if (!ctx->digcnt) |
| val |= SHA_REG_CTRL_ALGO_CONST; |
| if (final) |
| val |= SHA_REG_CTRL_CLOSE_HASH; |
| |
| mask = SHA_REG_CTRL_ALGO_CONST | SHA_REG_CTRL_CLOSE_HASH | |
| SHA_REG_CTRL_ALGO | SHA_REG_CTRL_LENGTH; |
| |
| omap_sham_write_mask(dd, SHA_REG_CTRL, val, mask); |
| } |
| |
| static void omap_sham_trigger_omap2(struct omap_sham_dev *dd, size_t length) |
| { |
| } |
| |
| static int omap_sham_poll_irq_omap2(struct omap_sham_dev *dd) |
| { |
| return omap_sham_wait(dd, SHA_REG_CTRL, SHA_REG_CTRL_INPUT_READY); |
| } |
| |
| static int get_block_size(struct omap_sham_reqctx *ctx) |
| { |
| int d; |
| |
| switch (ctx->flags & FLAGS_MODE_MASK) { |
| case FLAGS_MODE_MD5: |
| case FLAGS_MODE_SHA1: |
| d = SHA1_BLOCK_SIZE; |
| break; |
| case FLAGS_MODE_SHA224: |
| case FLAGS_MODE_SHA256: |
| d = SHA256_BLOCK_SIZE; |
| break; |
| case FLAGS_MODE_SHA384: |
| case FLAGS_MODE_SHA512: |
| d = SHA512_BLOCK_SIZE; |
| break; |
| default: |
| d = 0; |
| } |
| |
| return d; |
| } |
| |
| static void omap_sham_write_n(struct omap_sham_dev *dd, u32 offset, |
| u32 *value, int count) |
| { |
| for (; count--; value++, offset += 4) |
| omap_sham_write(dd, offset, *value); |
| } |
| |
| static void omap_sham_write_ctrl_omap4(struct omap_sham_dev *dd, size_t length, |
| int final, int dma) |
| { |
| struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req); |
| u32 val, mask; |
| |
| /* |
| * Setting ALGO_CONST only for the first iteration and |
| * CLOSE_HASH only for the last one. Note that flags mode bits |
| * correspond to algorithm encoding in mode register. |
| */ |
| val = (ctx->flags & FLAGS_MODE_MASK) >> (FLAGS_MODE_SHIFT); |
| if (!ctx->digcnt) { |
| struct crypto_ahash *tfm = crypto_ahash_reqtfm(dd->req); |
| struct omap_sham_ctx *tctx = crypto_ahash_ctx(tfm); |
| struct omap_sham_hmac_ctx *bctx = tctx->base; |
| int bs, nr_dr; |
| |
| val |= SHA_REG_MODE_ALGO_CONSTANT; |
| |
| if (ctx->flags & BIT(FLAGS_HMAC)) { |
| bs = get_block_size(ctx); |
| nr_dr = bs / (2 * sizeof(u32)); |
| val |= SHA_REG_MODE_HMAC_KEY_PROC; |
| omap_sham_write_n(dd, SHA_REG_ODIGEST(dd, 0), |
| (u32 *)bctx->ipad, nr_dr); |
| omap_sham_write_n(dd, SHA_REG_IDIGEST(dd, 0), |
| (u32 *)bctx->ipad + nr_dr, nr_dr); |
| ctx->digcnt += bs; |
| } |
| } |
| |
| if (final) { |
| val |= SHA_REG_MODE_CLOSE_HASH; |
| |
| if (ctx->flags & BIT(FLAGS_HMAC)) |
| val |= SHA_REG_MODE_HMAC_OUTER_HASH; |
| } |
| |
| mask = SHA_REG_MODE_ALGO_CONSTANT | SHA_REG_MODE_CLOSE_HASH | |
| SHA_REG_MODE_ALGO_MASK | SHA_REG_MODE_HMAC_OUTER_HASH | |
| SHA_REG_MODE_HMAC_KEY_PROC; |
| |
| dev_dbg(dd->dev, "ctrl: %08x, flags: %08lx\n", val, ctx->flags); |
| omap_sham_write_mask(dd, SHA_REG_MODE(dd), val, mask); |
| omap_sham_write(dd, SHA_REG_IRQENA, SHA_REG_IRQENA_OUTPUT_RDY); |
| omap_sham_write_mask(dd, SHA_REG_MASK(dd), |
| SHA_REG_MASK_IT_EN | |
| (dma ? SHA_REG_MASK_DMA_EN : 0), |
| SHA_REG_MASK_IT_EN | SHA_REG_MASK_DMA_EN); |
| } |
| |
| static void omap_sham_trigger_omap4(struct omap_sham_dev *dd, size_t length) |
| { |
| omap_sham_write(dd, SHA_REG_LENGTH(dd), length); |
| } |
| |
| static int omap_sham_poll_irq_omap4(struct omap_sham_dev *dd) |
| { |
| return omap_sham_wait(dd, SHA_REG_IRQSTATUS, |
| SHA_REG_IRQSTATUS_INPUT_RDY); |
| } |
| |
| static int omap_sham_xmit_cpu(struct omap_sham_dev *dd, size_t length, |
| int final) |
| { |
| struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req); |
| int count, len32, bs32, offset = 0; |
| const u32 *buffer; |
| int mlen; |
| struct sg_mapping_iter mi; |
| |
| dev_dbg(dd->dev, "xmit_cpu: digcnt: %d, length: %d, final: %d\n", |
| ctx->digcnt, length, final); |
| |
| dd->pdata->write_ctrl(dd, length, final, 0); |
| dd->pdata->trigger(dd, length); |
| |
| /* should be non-zero before next lines to disable clocks later */ |
| ctx->digcnt += length; |
| ctx->total -= length; |
| |
| if (final) |
| set_bit(FLAGS_FINAL, &dd->flags); /* catch last interrupt */ |
| |
| set_bit(FLAGS_CPU, &dd->flags); |
| |
| len32 = DIV_ROUND_UP(length, sizeof(u32)); |
| bs32 = get_block_size(ctx) / sizeof(u32); |
| |
| sg_miter_start(&mi, ctx->sg, ctx->sg_len, |
| SG_MITER_FROM_SG | SG_MITER_ATOMIC); |
| |
| mlen = 0; |
| |
| while (len32) { |
| if (dd->pdata->poll_irq(dd)) |
| return -ETIMEDOUT; |
| |
| for (count = 0; count < min(len32, bs32); count++, offset++) { |
| if (!mlen) { |
| sg_miter_next(&mi); |
| mlen = mi.length; |
| if (!mlen) { |
| pr_err("sg miter failure.\n"); |
| return -EINVAL; |
| } |
| offset = 0; |
| buffer = mi.addr; |
| } |
| omap_sham_write(dd, SHA_REG_DIN(dd, count), |
| buffer[offset]); |
| mlen -= 4; |
| } |
| len32 -= min(len32, bs32); |
| } |
| |
| sg_miter_stop(&mi); |
| |
| return -EINPROGRESS; |
| } |
| |
| static void omap_sham_dma_callback(void *param) |
| { |
| struct omap_sham_dev *dd = param; |
| |
| set_bit(FLAGS_DMA_READY, &dd->flags); |
| tasklet_schedule(&dd->done_task); |
| } |
| |
| static int omap_sham_xmit_dma(struct omap_sham_dev *dd, size_t length, |
| int final) |
| { |
| struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req); |
| struct dma_async_tx_descriptor *tx; |
| struct dma_slave_config cfg; |
| int ret; |
| |
| dev_dbg(dd->dev, "xmit_dma: digcnt: %d, length: %d, final: %d\n", |
| ctx->digcnt, length, final); |
| |
| if (!dma_map_sg(dd->dev, ctx->sg, ctx->sg_len, DMA_TO_DEVICE)) { |
| dev_err(dd->dev, "dma_map_sg error\n"); |
| return -EINVAL; |
| } |
| |
| memset(&cfg, 0, sizeof(cfg)); |
| |
| cfg.dst_addr = dd->phys_base + SHA_REG_DIN(dd, 0); |
| cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; |
| cfg.dst_maxburst = get_block_size(ctx) / DMA_SLAVE_BUSWIDTH_4_BYTES; |
| |
| ret = dmaengine_slave_config(dd->dma_lch, &cfg); |
| if (ret) { |
| pr_err("omap-sham: can't configure dmaengine slave: %d\n", ret); |
| return ret; |
| } |
| |
| tx = dmaengine_prep_slave_sg(dd->dma_lch, ctx->sg, ctx->sg_len, |
| DMA_MEM_TO_DEV, |
| DMA_PREP_INTERRUPT | DMA_CTRL_ACK); |
| |
| if (!tx) { |
| dev_err(dd->dev, "prep_slave_sg failed\n"); |
| return -EINVAL; |
| } |
| |
| tx->callback = omap_sham_dma_callback; |
| tx->callback_param = dd; |
| |
| dd->pdata->write_ctrl(dd, length, final, 1); |
| |
| ctx->digcnt += length; |
| ctx->total -= length; |
| |
| if (final) |
| set_bit(FLAGS_FINAL, &dd->flags); /* catch last interrupt */ |
| |
| set_bit(FLAGS_DMA_ACTIVE, &dd->flags); |
| |
| dmaengine_submit(tx); |
| dma_async_issue_pending(dd->dma_lch); |
| |
| dd->pdata->trigger(dd, length); |
| |
| return -EINPROGRESS; |
| } |
| |
| static int omap_sham_copy_sg_lists(struct omap_sham_reqctx *ctx, |
| struct scatterlist *sg, int bs, int new_len) |
| { |
| int n = sg_nents(sg); |
| struct scatterlist *tmp; |
| int offset = ctx->offset; |
| |
| ctx->total = new_len; |
| |
| if (ctx->bufcnt) |
| n++; |
| |
| ctx->sg = kmalloc_array(n, sizeof(*sg), GFP_KERNEL); |
| if (!ctx->sg) |
| return -ENOMEM; |
| |
| sg_init_table(ctx->sg, n); |
| |
| tmp = ctx->sg; |
| |
| ctx->sg_len = 0; |
| |
| if (ctx->bufcnt) { |
| sg_set_buf(tmp, ctx->dd->xmit_buf, ctx->bufcnt); |
| tmp = sg_next(tmp); |
| ctx->sg_len++; |
| new_len -= ctx->bufcnt; |
| } |
| |
| while (sg && new_len) { |
| int len = sg->length - offset; |
| |
| if (len <= 0) { |
| offset -= sg->length; |
| sg = sg_next(sg); |
| continue; |
| } |
| |
| if (new_len < len) |
| len = new_len; |
| |
| if (len > 0) { |
| new_len -= len; |
| sg_set_page(tmp, sg_page(sg), len, sg->offset + offset); |
| offset = 0; |
| ctx->offset = 0; |
| ctx->sg_len++; |
| if (new_len <= 0) |
| break; |
| tmp = sg_next(tmp); |
| } |
| |
| sg = sg_next(sg); |
| } |
| |
| if (tmp) |
| sg_mark_end(tmp); |
| |
| set_bit(FLAGS_SGS_ALLOCED, &ctx->dd->flags); |
| |
| ctx->offset += new_len - ctx->bufcnt; |
| ctx->bufcnt = 0; |
| |
| return 0; |
| } |
| |
| static int omap_sham_copy_sgs(struct omap_sham_reqctx *ctx, |
| struct scatterlist *sg, int bs, |
| unsigned int new_len) |
| { |
| int pages; |
| void *buf; |
| |
| pages = get_order(new_len); |
| |
| buf = (void *)__get_free_pages(GFP_ATOMIC, pages); |
| if (!buf) { |
| pr_err("Couldn't allocate pages for unaligned cases.\n"); |
| return -ENOMEM; |
| } |
| |
| if (ctx->bufcnt) |
| memcpy(buf, ctx->dd->xmit_buf, ctx->bufcnt); |
| |
| scatterwalk_map_and_copy(buf + ctx->bufcnt, sg, ctx->offset, |
| min(new_len, ctx->total) - ctx->bufcnt, 0); |
| sg_init_table(ctx->sgl, 1); |
| sg_set_buf(ctx->sgl, buf, new_len); |
| ctx->sg = ctx->sgl; |
| set_bit(FLAGS_SGS_COPIED, &ctx->dd->flags); |
| ctx->sg_len = 1; |
| ctx->offset += new_len - ctx->bufcnt; |
| ctx->bufcnt = 0; |
| ctx->total = new_len; |
| |
| return 0; |
| } |
| |
| static int omap_sham_align_sgs(struct scatterlist *sg, |
| int nbytes, int bs, bool final, |
| struct omap_sham_reqctx *rctx) |
| { |
| int n = 0; |
| bool aligned = true; |
| bool list_ok = true; |
| struct scatterlist *sg_tmp = sg; |
| int new_len; |
| int offset = rctx->offset; |
| int bufcnt = rctx->bufcnt; |
| |
| if (!sg || !sg->length || !nbytes) |
| return 0; |
| |
| new_len = nbytes; |
| |
| if (offset) |
| list_ok = false; |
| |
| if (final) |
| new_len = DIV_ROUND_UP(new_len, bs) * bs; |
| else |
| new_len = (new_len - 1) / bs * bs; |
| |
| if (!new_len) |
| return 0; |
| |
| if (nbytes != new_len) |
| list_ok = false; |
| |
| while (nbytes > 0 && sg_tmp) { |
| n++; |
| |
| if (bufcnt) { |
| if (!IS_ALIGNED(bufcnt, bs)) { |
| aligned = false; |
| break; |
| } |
| nbytes -= bufcnt; |
| bufcnt = 0; |
| if (!nbytes) |
| list_ok = false; |
| |
| continue; |
| } |
| |
| #ifdef CONFIG_ZONE_DMA |
| if (page_zonenum(sg_page(sg_tmp)) != ZONE_DMA) { |
| aligned = false; |
| break; |
| } |
| #endif |
| |
| if (offset < sg_tmp->length) { |
| if (!IS_ALIGNED(offset + sg_tmp->offset, 4)) { |
| aligned = false; |
| break; |
| } |
| |
| if (!IS_ALIGNED(sg_tmp->length - offset, bs)) { |
| aligned = false; |
| break; |
| } |
| } |
| |
| if (offset) { |
| offset -= sg_tmp->length; |
| if (offset < 0) { |
| nbytes += offset; |
| offset = 0; |
| } |
| } else { |
| nbytes -= sg_tmp->length; |
| } |
| |
| sg_tmp = sg_next(sg_tmp); |
| |
| if (nbytes < 0) { |
| list_ok = false; |
| break; |
| } |
| } |
| |
| if (new_len > OMAP_SHA_MAX_DMA_LEN) { |
| new_len = OMAP_SHA_MAX_DMA_LEN; |
| aligned = false; |
| } |
| |
| if (!aligned) |
| return omap_sham_copy_sgs(rctx, sg, bs, new_len); |
| else if (!list_ok) |
| return omap_sham_copy_sg_lists(rctx, sg, bs, new_len); |
| |
| rctx->total = new_len; |
| rctx->offset += new_len; |
| rctx->sg_len = n; |
| if (rctx->bufcnt) { |
| sg_init_table(rctx->sgl, 2); |
| sg_set_buf(rctx->sgl, rctx->dd->xmit_buf, rctx->bufcnt); |
| sg_chain(rctx->sgl, 2, sg); |
| rctx->sg = rctx->sgl; |
| } else { |
| rctx->sg = sg; |
| } |
| |
| return 0; |
| } |
| |
| static int omap_sham_prepare_request(struct ahash_request *req, bool update) |
| { |
| struct omap_sham_reqctx *rctx = ahash_request_ctx(req); |
| int bs; |
| int ret; |
| unsigned int nbytes; |
| bool final = rctx->flags & BIT(FLAGS_FINUP); |
| int hash_later; |
| |
| bs = get_block_size(rctx); |
| |
| nbytes = rctx->bufcnt; |
| |
| if (update) |
| nbytes += req->nbytes - rctx->offset; |
| |
| dev_dbg(rctx->dd->dev, |
| "%s: nbytes=%d, bs=%d, total=%d, offset=%d, bufcnt=%d\n", |
| __func__, nbytes, bs, rctx->total, rctx->offset, |
| rctx->bufcnt); |
| |
| if (!nbytes) |
| return 0; |
| |
| rctx->total = nbytes; |
| |
| if (update && req->nbytes && (!IS_ALIGNED(rctx->bufcnt, bs))) { |
| int len = bs - rctx->bufcnt % bs; |
| |
| if (len > req->nbytes) |
| len = req->nbytes; |
| scatterwalk_map_and_copy(rctx->buffer + rctx->bufcnt, req->src, |
| 0, len, 0); |
| rctx->bufcnt += len; |
| rctx->offset = len; |
| } |
| |
| if (rctx->bufcnt) |
| memcpy(rctx->dd->xmit_buf, rctx->buffer, rctx->bufcnt); |
| |
| ret = omap_sham_align_sgs(req->src, nbytes, bs, final, rctx); |
| if (ret) |
| return ret; |
| |
| hash_later = nbytes - rctx->total; |
| if (hash_later < 0) |
| hash_later = 0; |
| |
| if (hash_later) { |
| scatterwalk_map_and_copy(rctx->buffer, |
| req->src, |
| req->nbytes - hash_later, |
| hash_later, 0); |
| |
| rctx->bufcnt = hash_later; |
| } else { |
| rctx->bufcnt = 0; |
| } |
| |
| if (hash_later > rctx->buflen) |
| set_bit(FLAGS_HUGE, &rctx->dd->flags); |
| |
| rctx->total = min(nbytes, rctx->total); |
| |
| return 0; |
| } |
| |
| static int omap_sham_update_dma_stop(struct omap_sham_dev *dd) |
| { |
| struct omap_sham_reqctx *ctx = ahash_request_ctx(dd->req); |
| |
| dma_unmap_sg(dd->dev, ctx->sg, ctx->sg_len, DMA_TO_DEVICE); |
| |
| clear_bit(FLAGS_DMA_ACTIVE, &dd->flags); |
| |
| return 0; |
| } |
| |
| static int omap_sham_init(struct ahash_request *req) |
| { |
| struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); |
| struct omap_sham_ctx *tctx = crypto_ahash_ctx(tfm); |
| struct omap_sham_reqctx *ctx = ahash_request_ctx(req); |
| struct omap_sham_dev *dd = NULL, *tmp; |
| int bs = 0; |
| |
| spin_lock_bh(&sham.lock); |
| if (!tctx->dd) { |
| list_for_each_entry(tmp, &sham.dev_list, list) { |
| dd = tmp; |
| break; |
| } |
| tctx->dd = dd; |
| } else { |
| dd = tctx->dd; |
| } |
| spin_unlock_bh(&sham.lock); |
| |
| ctx->dd = dd; |
| |
| ctx->flags = 0; |
| |
| dev_dbg(dd->dev, "init: digest size: %d\n", |
| crypto_ahash_digestsize(tfm)); |
| |
| switch (crypto_ahash_digestsize(tfm)) { |
| case MD5_DIGEST_SIZE: |
| ctx->flags |= FLAGS_MODE_MD5; |
| bs = SHA1_BLOCK_SIZE; |
| break; |
| case SHA1_DIGEST_SIZE: |
| ctx->flags |= FLAGS_MODE_SHA1; |
| bs = SHA1_BLOCK_SIZE; |
| break; |
| case SHA224_DIGEST_SIZE: |
| ctx->flags |= FLAGS_MODE_SHA224; |
| bs = SHA224_BLOCK_SIZE; |
| break; |
| case SHA256_DIGEST_SIZE: |
| ctx->flags |= FLAGS_MODE_SHA256; |
| bs = SHA256_BLOCK_SIZE; |
| break; |
| case SHA384_DIGEST_SIZE: |
| ctx->flags |= FLAGS_MODE_SHA384; |
| bs = SHA384_BLOCK_SIZE; |
| break; |
| case SHA512_DIGEST_SIZE: |
| ctx->flags |= FLAGS_MODE_SHA512; |
| bs = SHA512_BLOCK_SIZE; |
| break; |
| } |
| |
| ctx->bufcnt = 0; |
| ctx->digcnt = 0; |
| ctx->total = 0; |
| ctx->offset = 0; |
| ctx->buflen = BUFLEN; |
| |
| if (tctx->flags & BIT(FLAGS_HMAC)) { |
| if (!test_bit(FLAGS_AUTO_XOR, &dd->flags)) { |
| struct omap_sham_hmac_ctx *bctx = tctx->base; |
| |
| memcpy(ctx->buffer, bctx->ipad, bs); |
| ctx->bufcnt = bs; |
| } |
| |
| ctx->flags |= BIT(FLAGS_HMAC); |
| } |
| |
| return 0; |
| |
| } |
| |
| static int omap_sham_update_req(struct omap_sham_dev *dd) |
| { |
| struct ahash_request *req = dd->req; |
| struct omap_sham_reqctx *ctx = ahash_request_ctx(req); |
| int err; |
| bool final = (ctx->flags & BIT(FLAGS_FINUP)) && |
| !(dd->flags & BIT(FLAGS_HUGE)); |
| |
| dev_dbg(dd->dev, "update_req: total: %u, digcnt: %d, final: %d", |
| ctx->total, ctx->digcnt, final); |
| |
| if (ctx->total < get_block_size(ctx) || |
| ctx->total < dd->fallback_sz) |
| ctx->flags |= BIT(FLAGS_CPU); |
| |
| if (ctx->flags & BIT(FLAGS_CPU)) |
| err = omap_sham_xmit_cpu(dd, ctx->total, final); |
| else |
| err = omap_sham_xmit_dma(dd, ctx->total, final); |
| |
| /* wait for dma completion before can take more data */ |
| dev_dbg(dd->dev, "update: err: %d, digcnt: %d\n", err, ctx->digcnt); |
| |
| return err; |
| } |
| |
| static int omap_sham_final_req(struct omap_sham_dev *dd) |
| { |
| struct ahash_request *req = dd->req; |
| struct omap_sham_reqctx *ctx = ahash_request_ctx(req); |
| int err = 0, use_dma = 1; |
| |
| if (dd->flags & BIT(FLAGS_HUGE)) |
| return 0; |
| |
| if ((ctx->total <= get_block_size(ctx)) || dd->polling_mode) |
| /* |
| * faster to handle last block with cpu or |
| * use cpu when dma is not present. |
| */ |
| use_dma = 0; |
| |
| if (use_dma) |
| err = omap_sham_xmit_dma(dd, ctx->total, 1); |
| else |
| err = omap_sham_xmit_cpu(dd, ctx->total, 1); |
| |
| ctx->bufcnt = 0; |
| |
| dev_dbg(dd->dev, "final_req: err: %d\n", err); |
| |
| return err; |
| } |
| |
| static int omap_sham_finish_hmac(struct ahash_request *req) |
| { |
| struct omap_sham_ctx *tctx = crypto_tfm_ctx(req->base.tfm); |
| struct omap_sham_hmac_ctx *bctx = tctx->base; |
| int bs = crypto_shash_blocksize(bctx->shash); |
| int ds = crypto_shash_digestsize(bctx->shash); |
| SHASH_DESC_ON_STACK(shash, bctx->shash); |
| |
| shash->tfm = bctx->shash; |
| |
| return crypto_shash_init(shash) ?: |
| crypto_shash_update(shash, bctx->opad, bs) ?: |
| crypto_shash_finup(shash, req->result, ds, req->result); |
| } |
| |
| static int omap_sham_finish(struct ahash_request *req) |
| { |
| struct omap_sham_reqctx *ctx = ahash_request_ctx(req); |
| struct omap_sham_dev *dd = ctx->dd; |
| int err = 0; |
| |
| if (ctx->digcnt) { |
| omap_sham_copy_ready_hash(req); |
| if ((ctx->flags & BIT(FLAGS_HMAC)) && |
| !test_bit(FLAGS_AUTO_XOR, &dd->flags)) |
| err = omap_sham_finish_hmac(req); |
| } |
| |
| dev_dbg(dd->dev, "digcnt: %d, bufcnt: %d\n", ctx->digcnt, ctx->bufcnt); |
| |
| return err; |
| } |
| |
| static void omap_sham_finish_req(struct ahash_request *req, int err) |
| { |
| struct omap_sham_reqctx *ctx = ahash_request_ctx(req); |
| struct omap_sham_dev *dd = ctx->dd; |
| |
| if (test_bit(FLAGS_SGS_COPIED, &dd->flags)) |
| free_pages((unsigned long)sg_virt(ctx->sg), |
| get_order(ctx->sg->length)); |
| |
| if (test_bit(FLAGS_SGS_ALLOCED, &dd->flags)) |
| kfree(ctx->sg); |
| |
| ctx->sg = NULL; |
| |
| dd->flags &= ~(BIT(FLAGS_SGS_ALLOCED) | BIT(FLAGS_SGS_COPIED)); |
| |
| if (dd->flags & BIT(FLAGS_HUGE)) { |
| dd->flags &= ~(BIT(FLAGS_CPU) | BIT(FLAGS_DMA_READY) | |
| BIT(FLAGS_OUTPUT_READY) | BIT(FLAGS_HUGE)); |
| omap_sham_prepare_request(req, ctx->op == OP_UPDATE); |
| if (ctx->op == OP_UPDATE || (dd->flags & BIT(FLAGS_HUGE))) { |
| err = omap_sham_update_req(dd); |
| if (err != -EINPROGRESS && |
| (ctx->flags & BIT(FLAGS_FINUP))) |
| err = omap_sham_final_req(dd); |
| } else if (ctx->op == OP_FINAL) { |
| omap_sham_final_req(dd); |
| } |
| return; |
| } |
| |
| if (!err) { |
| dd->pdata->copy_hash(req, 1); |
| if (test_bit(FLAGS_FINAL, &dd->flags)) |
| err = omap_sham_finish(req); |
| } else { |
| ctx->flags |= BIT(FLAGS_ERROR); |
| } |
| |
| /* atomic operation is not needed here */ |
| dd->flags &= ~(BIT(FLAGS_BUSY) | BIT(FLAGS_FINAL) | BIT(FLAGS_CPU) | |
| BIT(FLAGS_DMA_READY) | BIT(FLAGS_OUTPUT_READY)); |
| |
| pm_runtime_mark_last_busy(dd->dev); |
| pm_runtime_put_autosuspend(dd->dev); |
| |
| ctx->offset = 0; |
| |
| if (req->base.complete) |
| req->base.complete(&req->base, err); |
| } |
| |
| static int omap_sham_handle_queue(struct omap_sham_dev *dd, |
| struct ahash_request *req) |
| { |
| struct crypto_async_request *async_req, *backlog; |
| struct omap_sham_reqctx *ctx; |
| unsigned long flags; |
| int err = 0, ret = 0; |
| |
| retry: |
| spin_lock_irqsave(&dd->lock, flags); |
| if (req) |
| ret = ahash_enqueue_request(&dd->queue, req); |
| if (test_bit(FLAGS_BUSY, &dd->flags)) { |
| spin_unlock_irqrestore(&dd->lock, flags); |
| return ret; |
| } |
| backlog = crypto_get_backlog(&dd->queue); |
| async_req = crypto_dequeue_request(&dd->queue); |
| if (async_req) |
| set_bit(FLAGS_BUSY, &dd->flags); |
| spin_unlock_irqrestore(&dd->lock, flags); |
| |
| if (!async_req) |
| return ret; |
| |
| if (backlog) |
| backlog->complete(backlog, -EINPROGRESS); |
| |
| req = ahash_request_cast(async_req); |
| dd->req = req; |
| ctx = ahash_request_ctx(req); |
| |
| err = omap_sham_prepare_request(req, ctx->op == OP_UPDATE); |
| if (err || !ctx->total) |
| goto err1; |
| |
| dev_dbg(dd->dev, "handling new req, op: %lu, nbytes: %d\n", |
| ctx->op, req->nbytes); |
| |
| err = omap_sham_hw_init(dd); |
| if (err) |
| goto err1; |
| |
| if (ctx->digcnt) |
| /* request has changed - restore hash */ |
| dd->pdata->copy_hash(req, 0); |
| |
| if (ctx->op == OP_UPDATE || (dd->flags & BIT(FLAGS_HUGE))) { |
| err = omap_sham_update_req(dd); |
| if (err != -EINPROGRESS && (ctx->flags & BIT(FLAGS_FINUP))) |
| /* no final() after finup() */ |
| err = omap_sham_final_req(dd); |
| } else if (ctx->op == OP_FINAL) { |
| err = omap_sham_final_req(dd); |
| } |
| err1: |
| dev_dbg(dd->dev, "exit, err: %d\n", err); |
| |
| if (err != -EINPROGRESS) { |
| /* done_task will not finish it, so do it here */ |
| omap_sham_finish_req(req, err); |
| req = NULL; |
| |
| /* |
| * Execute next request immediately if there is anything |
| * in queue. |
| */ |
| goto retry; |
| } |
| |
| return ret; |
| } |
| |
| static int omap_sham_enqueue(struct ahash_request *req, unsigned int op) |
| { |
| struct omap_sham_reqctx *ctx = ahash_request_ctx(req); |
| struct omap_sham_ctx *tctx = crypto_tfm_ctx(req->base.tfm); |
| struct omap_sham_dev *dd = tctx->dd; |
| |
| ctx->op = op; |
| |
| return omap_sham_handle_queue(dd, req); |
| } |
| |
| static int omap_sham_update(struct ahash_request *req) |
| { |
| struct omap_sham_reqctx *ctx = ahash_request_ctx(req); |
| struct omap_sham_dev *dd = ctx->dd; |
| |
| if (!req->nbytes) |
| return 0; |
| |
| if (ctx->bufcnt + req->nbytes <= ctx->buflen) { |
| scatterwalk_map_and_copy(ctx->buffer + ctx->bufcnt, req->src, |
| 0, req->nbytes, 0); |
| ctx->bufcnt += req->nbytes; |
| return 0; |
| } |
| |
| if (dd->polling_mode) |
| ctx->flags |= BIT(FLAGS_CPU); |
| |
| return omap_sham_enqueue(req, OP_UPDATE); |
| } |
| |
| static int omap_sham_final_shash(struct ahash_request *req) |
| { |
| struct omap_sham_ctx *tctx = crypto_tfm_ctx(req->base.tfm); |
| struct omap_sham_reqctx *ctx = ahash_request_ctx(req); |
| int offset = 0; |
| |
| /* |
| * If we are running HMAC on limited hardware support, skip |
| * the ipad in the beginning of the buffer if we are going for |
| * software fallback algorithm. |
| */ |
| if (test_bit(FLAGS_HMAC, &ctx->flags) && |
| !test_bit(FLAGS_AUTO_XOR, &ctx->dd->flags)) |
| offset = get_block_size(ctx); |
| |
| return crypto_shash_tfm_digest(tctx->fallback, ctx->buffer + offset, |
| ctx->bufcnt - offset, req->result); |
| } |
| |
| static int omap_sham_final(struct ahash_request *req) |
| { |
| struct omap_sham_reqctx *ctx = ahash_request_ctx(req); |
| |
| ctx->flags |= BIT(FLAGS_FINUP); |
| |
| if (ctx->flags & BIT(FLAGS_ERROR)) |
| return 0; /* uncompleted hash is not needed */ |
| |
| /* |
| * OMAP HW accel works only with buffers >= 9. |
| * HMAC is always >= 9 because ipad == block size. |
| * If buffersize is less than fallback_sz, we use fallback |
| * SW encoding, as using DMA + HW in this case doesn't provide |
| * any benefit. |
| */ |
| if (!ctx->digcnt && ctx->bufcnt < ctx->dd->fallback_sz) |
| return omap_sham_final_shash(req); |
| else if (ctx->bufcnt) |
| return omap_sham_enqueue(req, OP_FINAL); |
| |
| /* copy ready hash (+ finalize hmac) */ |
| return omap_sham_finish(req); |
| } |
| |
| static int omap_sham_finup(struct ahash_request *req) |
| { |
| struct omap_sham_reqctx *ctx = ahash_request_ctx(req); |
| int err1, err2; |
| |
| ctx->flags |= BIT(FLAGS_FINUP); |
| |
| err1 = omap_sham_update(req); |
| if (err1 == -EINPROGRESS || err1 == -EBUSY) |
| return err1; |
| /* |
| * final() has to be always called to cleanup resources |
| * even if udpate() failed, except EINPROGRESS |
| */ |
| err2 = omap_sham_final(req); |
| |
| return err1 ?: err2; |
| } |
| |
| static int omap_sham_digest(struct ahash_request *req) |
| { |
| return omap_sham_init(req) ?: omap_sham_finup(req); |
| } |
| |
| static int omap_sham_setkey(struct crypto_ahash *tfm, const u8 *key, |
| unsigned int keylen) |
| { |
| struct omap_sham_ctx *tctx = crypto_ahash_ctx(tfm); |
| struct omap_sham_hmac_ctx *bctx = tctx->base; |
| int bs = crypto_shash_blocksize(bctx->shash); |
| int ds = crypto_shash_digestsize(bctx->shash); |
| struct omap_sham_dev *dd = NULL, *tmp; |
| int err, i; |
| |
| spin_lock_bh(&sham.lock); |
| if (!tctx->dd) { |
| list_for_each_entry(tmp, &sham.dev_list, list) { |
| dd = tmp; |
| break; |
| } |
| tctx->dd = dd; |
| } else { |
| dd = tctx->dd; |
| } |
| spin_unlock_bh(&sham.lock); |
| |
| err = crypto_shash_setkey(tctx->fallback, key, keylen); |
| if (err) |
| return err; |
| |
| if (keylen > bs) { |
| err = crypto_shash_tfm_digest(bctx->shash, key, keylen, |
| bctx->ipad); |
| if (err) |
| return err; |
| keylen = ds; |
| } else { |
| memcpy(bctx->ipad, key, keylen); |
| } |
| |
| memset(bctx->ipad + keylen, 0, bs - keylen); |
| |
| if (!test_bit(FLAGS_AUTO_XOR, &dd->flags)) { |
| memcpy(bctx->opad, bctx->ipad, bs); |
| |
| for (i = 0; i < bs; i++) { |
| bctx->ipad[i] ^= HMAC_IPAD_VALUE; |
| bctx->opad[i] ^= HMAC_OPAD_VALUE; |
| } |
| } |
| |
| return err; |
| } |
| |
| static int omap_sham_cra_init_alg(struct crypto_tfm *tfm, const char *alg_base) |
| { |
| struct omap_sham_ctx *tctx = crypto_tfm_ctx(tfm); |
| const char *alg_name = crypto_tfm_alg_name(tfm); |
| |
| /* Allocate a fallback and abort if it failed. */ |
| tctx->fallback = crypto_alloc_shash(alg_name, 0, |
| CRYPTO_ALG_NEED_FALLBACK); |
| if (IS_ERR(tctx->fallback)) { |
| pr_err("omap-sham: fallback driver '%s' " |
| "could not be loaded.\n", alg_name); |
| return PTR_ERR(tctx->fallback); |
| } |
| |
| crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm), |
| sizeof(struct omap_sham_reqctx) + BUFLEN); |
| |
| if (alg_base) { |
| struct omap_sham_hmac_ctx *bctx = tctx->base; |
| tctx->flags |= BIT(FLAGS_HMAC); |
| bctx->shash = crypto_alloc_shash(alg_base, 0, |
| CRYPTO_ALG_NEED_FALLBACK); |
| if (IS_ERR(bctx->shash)) { |
| pr_err("omap-sham: base driver '%s' " |
| "could not be loaded.\n", alg_base); |
| crypto_free_shash(tctx->fallback); |
| return PTR_ERR(bctx->shash); |
| } |
| |
| } |
| |
| return 0; |
| } |
| |
| static int omap_sham_cra_init(struct crypto_tfm *tfm) |
| { |
| return omap_sham_cra_init_alg(tfm, NULL); |
| } |
| |
| static int omap_sham_cra_sha1_init(struct crypto_tfm *tfm) |
| { |
| return omap_sham_cra_init_alg(tfm, "sha1"); |
| } |
| |
| static int omap_sham_cra_sha224_init(struct crypto_tfm *tfm) |
| { |
| return omap_sham_cra_init_alg(tfm, "sha224"); |
| } |
| |
| static int omap_sham_cra_sha256_init(struct crypto_tfm *tfm) |
| { |
| return omap_sham_cra_init_alg(tfm, "sha256"); |
| } |
| |
| static int omap_sham_cra_md5_init(struct crypto_tfm *tfm) |
| { |
| return omap_sham_cra_init_alg(tfm, "md5"); |
| } |
| |
| static int omap_sham_cra_sha384_init(struct crypto_tfm *tfm) |
| { |
| return omap_sham_cra_init_alg(tfm, "sha384"); |
| } |
| |
| static int omap_sham_cra_sha512_init(struct crypto_tfm *tfm) |
| { |
| return omap_sham_cra_init_alg(tfm, "sha512"); |
| } |
| |
| static void omap_sham_cra_exit(struct crypto_tfm *tfm) |
| { |
| struct omap_sham_ctx *tctx = crypto_tfm_ctx(tfm); |
| |
| crypto_free_shash(tctx->fallback); |
| tctx->fallback = NULL; |
| |
| if (tctx->flags & BIT(FLAGS_HMAC)) { |
| struct omap_sham_hmac_ctx *bctx = tctx->base; |
| crypto_free_shash(bctx->shash); |
| } |
| } |
| |
| static int omap_sham_export(struct ahash_request *req, void *out) |
| { |
| struct omap_sham_reqctx *rctx = ahash_request_ctx(req); |
| |
| memcpy(out, rctx, sizeof(*rctx) + rctx->bufcnt); |
| |
| return 0; |
| } |
| |
| static int omap_sham_import(struct ahash_request *req, const void *in) |
| { |
| struct omap_sham_reqctx *rctx = ahash_request_ctx(req); |
| const struct omap_sham_reqctx *ctx_in = in; |
| |
| memcpy(rctx, in, sizeof(*rctx) + ctx_in->bufcnt); |
| |
| return 0; |
| } |
| |
| static struct ahash_alg algs_sha1_md5[] = { |
| { |
| .init = omap_sham_init, |
| .update = omap_sham_update, |
| .final = omap_sham_final, |
| .finup = omap_sham_finup, |
| .digest = omap_sham_digest, |
| .halg.digestsize = SHA1_DIGEST_SIZE, |
| .halg.base = { |
| .cra_name = "sha1", |
| .cra_driver_name = "omap-sha1", |
| .cra_priority = 400, |
| .cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY | |
| CRYPTO_ALG_ASYNC | |
| CRYPTO_ALG_NEED_FALLBACK, |
| .cra_blocksize = SHA1_BLOCK_SIZE, |
| .cra_ctxsize = sizeof(struct omap_sham_ctx), |
| .cra_alignmask = OMAP_ALIGN_MASK, |
| .cra_module = THIS_MODULE, |
| .cra_init = omap_sham_cra_init, |
| .cra_exit = omap_sham_cra_exit, |
| } |
| }, |
| { |
| .init = omap_sham_init, |
| .update = omap_sham_update, |
| .final = omap_sham_final, |
| .finup = omap_sham_finup, |
| .digest = omap_sham_digest, |
| .halg.digestsize = MD5_DIGEST_SIZE, |
| .halg.base = { |
| .cra_name = "md5", |
| .cra_driver_name = "omap-md5", |
| .cra_priority = 400, |
| .cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY | |
| CRYPTO_ALG_ASYNC | |
| CRYPTO_ALG_NEED_FALLBACK, |
| .cra_blocksize = SHA1_BLOCK_SIZE, |
| .cra_ctxsize = sizeof(struct omap_sham_ctx), |
| .cra_alignmask = OMAP_ALIGN_MASK, |
| .cra_module = THIS_MODULE, |
| .cra_init = omap_sham_cra_init, |
| .cra_exit = omap_sham_cra_exit, |
| } |
| }, |
| { |
| .init = omap_sham_init, |
| .update = omap_sham_update, |
| .final = omap_sham_final, |
| .finup = omap_sham_finup, |
| .digest = omap_sham_digest, |
| .setkey = omap_sham_setkey, |
| .halg.digestsize = SHA1_DIGEST_SIZE, |
| .halg.base = { |
| .cra_name = "hmac(sha1)", |
| .cra_driver_name = "omap-hmac-sha1", |
| .cra_priority = 400, |
| .cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY | |
| CRYPTO_ALG_ASYNC | |
| CRYPTO_ALG_NEED_FALLBACK, |
| .cra_blocksize = SHA1_BLOCK_SIZE, |
| .cra_ctxsize = sizeof(struct omap_sham_ctx) + |
| sizeof(struct omap_sham_hmac_ctx), |
| .cra_alignmask = OMAP_ALIGN_MASK, |
| .cra_module = THIS_MODULE, |
| .cra_init = omap_sham_cra_sha1_init, |
| .cra_exit = omap_sham_cra_exit, |
| } |
| }, |
| { |
| .init = omap_sham_init, |
| .update = omap_sham_update, |
| .final = omap_sham_final, |
| .finup = omap_sham_finup, |
| .digest = omap_sham_digest, |
| .setkey = omap_sham_setkey, |
| .halg.digestsize = MD5_DIGEST_SIZE, |
| .halg.base = { |
| .cra_name = "hmac(md5)", |
| .cra_driver_name = "omap-hmac-md5", |
| .cra_priority = 400, |
| .cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY | |
| CRYPTO_ALG_ASYNC | |
| CRYPTO_ALG_NEED_FALLBACK, |
| .cra_blocksize = SHA1_BLOCK_SIZE, |
| .cra_ctxsize = sizeof(struct omap_sham_ctx) + |
| sizeof(struct omap_sham_hmac_ctx), |
| .cra_alignmask = OMAP_ALIGN_MASK, |
| .cra_module = THIS_MODULE, |
| .cra_init = omap_sham_cra_md5_init, |
| .cra_exit = omap_sham_cra_exit, |
| } |
| } |
| }; |
| |
| /* OMAP4 has some algs in addition to what OMAP2 has */ |
| static struct ahash_alg algs_sha224_sha256[] = { |
| { |
| .init = omap_sham_init, |
| .update = omap_sham_update, |
| .final = omap_sham_final, |
| .finup = omap_sham_finup, |
| .digest = omap_sham_digest, |
| .halg.digestsize = SHA224_DIGEST_SIZE, |
| .halg.base = { |
| .cra_name = "sha224", |
| .cra_driver_name = "omap-sha224", |
| .cra_priority = 400, |
| .cra_flags = CRYPTO_ALG_ASYNC | |
| CRYPTO_ALG_NEED_FALLBACK, |
| .cra_blocksize = SHA224_BLOCK_SIZE, |
| .cra_ctxsize = sizeof(struct omap_sham_ctx), |
| .cra_alignmask = OMAP_ALIGN_MASK, |
| .cra_module = THIS_MODULE, |
| .cra_init = omap_sham_cra_init, |
| .cra_exit = omap_sham_cra_exit, |
| } |
| }, |
| { |
| .init = omap_sham_init, |
| .update = omap_sham_update, |
| .final = omap_sham_final, |
| .finup = omap_sham_finup, |
| .digest = omap_sham_digest, |
| .halg.digestsize = SHA256_DIGEST_SIZE, |
| .halg.base = { |
| .cra_name = "sha256", |
| .cra_driver_name = "omap-sha256", |
| .cra_priority = 400, |
| .cra_flags = CRYPTO_ALG_ASYNC | |
| CRYPTO_ALG_NEED_FALLBACK, |
| .cra_blocksize = SHA256_BLOCK_SIZE, |
| .cra_ctxsize = sizeof(struct omap_sham_ctx), |
| .cra_alignmask = OMAP_ALIGN_MASK, |
| .cra_module = THIS_MODULE, |
| .cra_init = omap_sham_cra_init, |
| .cra_exit = omap_sham_cra_exit, |
| } |
| }, |
| { |
| .init = omap_sham_init, |
| .update = omap_sham_update, |
| .final = omap_sham_final, |
| .finup = omap_sham_finup, |
| .digest = omap_sham_digest, |
| .setkey = omap_sham_setkey, |
| .halg.digestsize = SHA224_DIGEST_SIZE, |
| .halg.base = { |
| .cra_name = "hmac(sha224)", |
| .cra_driver_name = "omap-hmac-sha224", |
| .cra_priority = 400, |
| .cra_flags = CRYPTO_ALG_ASYNC | |
| CRYPTO_ALG_NEED_FALLBACK, |
| .cra_blocksize = SHA224_BLOCK_SIZE, |
| .cra_ctxsize = sizeof(struct omap_sham_ctx) + |
| sizeof(struct omap_sham_hmac_ctx), |
| .cra_alignmask = OMAP_ALIGN_MASK, |
| .cra_module = THIS_MODULE, |
| .cra_init = omap_sham_cra_sha224_init, |
| .cra_exit = omap_sham_cra_exit, |
| } |
| }, |
| { |
| .init = omap_sham_init, |
| .update = omap_sham_update, |
| .final = omap_sham_final, |
| .finup = omap_sham_finup, |
| .digest = omap_sham_digest, |
| .setkey = omap_sham_setkey, |
| .halg.digestsize = SHA256_DIGEST_SIZE, |
| .halg.base = { |
| .cra_name = "hmac(sha256)", |
| .cra_driver_name = "omap-hmac-sha256", |
| .cra_priority = 400, |
| .cra_flags = CRYPTO_ALG_ASYNC | |
| CRYPTO_ALG_NEED_FALLBACK, |
| .cra_blocksize = SHA256_BLOCK_SIZE, |
| .cra_ctxsize = sizeof(struct omap_sham_ctx) + |
| sizeof(struct omap_sham_hmac_ctx), |
| .cra_alignmask = OMAP_ALIGN_MASK, |
| .cra_module = THIS_MODULE, |
| .cra_init = omap_sham_cra_sha256_init, |
| .cra_exit = omap_sham_cra_exit, |
| } |
| }, |
| }; |
| |
| static struct ahash_alg algs_sha384_sha512[] = { |
| { |
| .init = omap_sham_init, |
| .update = omap_sham_update, |
| .final = omap_sham_final, |
| .finup = omap_sham_finup, |
| .digest = omap_sham_digest, |
| .halg.digestsize = SHA384_DIGEST_SIZE, |
| .halg.base = { |
| .cra_name = "sha384", |
| .cra_driver_name = "omap-sha384", |
| .cra_priority = 400, |
| .cra_flags = CRYPTO_ALG_ASYNC | |
| CRYPTO_ALG_NEED_FALLBACK, |
| .cra_blocksize = SHA384_BLOCK_SIZE, |
| .cra_ctxsize = sizeof(struct omap_sham_ctx), |
| .cra_alignmask = OMAP_ALIGN_MASK, |
| .cra_module = THIS_MODULE, |
| .cra_init = omap_sham_cra_init, |
| .cra_exit = omap_sham_cra_exit, |
| } |
| }, |
| { |
| .init = omap_sham_init, |
| .update = omap_sham_update, |
| .final = omap_sham_final, |
| .finup = omap_sham_finup, |
| .digest = omap_sham_digest, |
| .halg.digestsize = SHA512_DIGEST_SIZE, |
| .halg.base = { |
| .cra_name = "sha512", |
| .cra_driver_name = "omap-sha512", |
| .cra_priority = 400, |
| .cra_flags = CRYPTO_ALG_ASYNC | |
| CRYPTO_ALG_NEED_FALLBACK, |
| .cra_blocksize = SHA512_BLOCK_SIZE, |
| .cra_ctxsize = sizeof(struct omap_sham_ctx), |
| .cra_alignmask = OMAP_ALIGN_MASK, |
| .cra_module = THIS_MODULE, |
| .cra_init = omap_sham_cra_init, |
| .cra_exit = omap_sham_cra_exit, |
| } |
| }, |
| { |
| .init = omap_sham_init, |
| .update = omap_sham_update, |
| .final = omap_sham_final, |
| .finup = omap_sham_finup, |
| .digest = omap_sham_digest, |
| .setkey = omap_sham_setkey, |
| .halg.digestsize = SHA384_DIGEST_SIZE, |
| .halg.base = { |
| .cra_name = "hmac(sha384)", |
| .cra_driver_name = "omap-hmac-sha384", |
| .cra_priority = 400, |
| .cra_flags = CRYPTO_ALG_ASYNC | |
| CRYPTO_ALG_NEED_FALLBACK, |
| .cra_blocksize = SHA384_BLOCK_SIZE, |
| .cra_ctxsize = sizeof(struct omap_sham_ctx) + |
| sizeof(struct omap_sham_hmac_ctx), |
| .cra_alignmask = OMAP_ALIGN_MASK, |
| .cra_module = THIS_MODULE, |
| .cra_init = omap_sham_cra_sha384_init, |
| .cra_exit = omap_sham_cra_exit, |
| } |
| }, |
| { |
| .init = omap_sham_init, |
| .update = omap_sham_update, |
| .final = omap_sham_final, |
| .finup = omap_sham_finup, |
| .digest = omap_sham_digest, |
| .setkey = omap_sham_setkey, |
| .halg.digestsize = SHA512_DIGEST_SIZE, |
| .halg.base = { |
| .cra_name = "hmac(sha512)", |
| .cra_driver_name = "omap-hmac-sha512", |
| .cra_priority = 400, |
| .cra_flags = CRYPTO_ALG_ASYNC | |
| CRYPTO_ALG_NEED_FALLBACK, |
| .cra_blocksize = SHA512_BLOCK_SIZE, |
| .cra_ctxsize = sizeof(struct omap_sham_ctx) + |
| sizeof(struct omap_sham_hmac_ctx), |
| .cra_alignmask = OMAP_ALIGN_MASK, |
| .cra_module = THIS_MODULE, |
| .cra_init = omap_sham_cra_sha512_init, |
| .cra_exit = omap_sham_cra_exit, |
| } |
| }, |
| }; |
| |
| static void omap_sham_done_task(unsigned long data) |
| { |
| struct omap_sham_dev *dd = (struct omap_sham_dev *)data; |
| int err = 0; |
| |
| dev_dbg(dd->dev, "%s: flags=%lx\n", __func__, dd->flags); |
| |
| if (!test_bit(FLAGS_BUSY, &dd->flags)) { |
| omap_sham_handle_queue(dd, NULL); |
| return; |
| } |
| |
| if (test_bit(FLAGS_CPU, &dd->flags)) { |
| if (test_and_clear_bit(FLAGS_OUTPUT_READY, &dd->flags)) |
| goto finish; |
| } else if (test_bit(FLAGS_DMA_READY, &dd->flags)) { |
| if (test_and_clear_bit(FLAGS_DMA_ACTIVE, &dd->flags)) { |
| omap_sham_update_dma_stop(dd); |
| if (dd->err) { |
| err = dd->err; |
| goto finish; |
| } |
| } |
| if (test_and_clear_bit(FLAGS_OUTPUT_READY, &dd->flags)) { |
| /* hash or semi-hash ready */ |
| clear_bit(FLAGS_DMA_READY, &dd->flags); |
| goto finish; |
| } |
| } |
| |
| return; |
| |
| finish: |
| dev_dbg(dd->dev, "update done: err: %d\n", err); |
| /* finish curent request */ |
| omap_sham_finish_req(dd->req, err); |
| |
| /* If we are not busy, process next req */ |
| if (!test_bit(FLAGS_BUSY, &dd->flags)) |
| omap_sham_handle_queue(dd, NULL); |
| } |
| |
| static irqreturn_t omap_sham_irq_common(struct omap_sham_dev *dd) |
| { |
| if (!test_bit(FLAGS_BUSY, &dd->flags)) { |
| dev_warn(dd->dev, "Interrupt when no active requests.\n"); |
| } else { |
| set_bit(FLAGS_OUTPUT_READY, &dd->flags); |
| tasklet_schedule(&dd->done_task); |
| } |
| |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t omap_sham_irq_omap2(int irq, void *dev_id) |
| { |
| struct omap_sham_dev *dd = dev_id; |
| |
| if (unlikely(test_bit(FLAGS_FINAL, &dd->flags))) |
| /* final -> allow device to go to power-saving mode */ |
| omap_sham_write_mask(dd, SHA_REG_CTRL, 0, SHA_REG_CTRL_LENGTH); |
| |
| omap_sham_write_mask(dd, SHA_REG_CTRL, SHA_REG_CTRL_OUTPUT_READY, |
| SHA_REG_CTRL_OUTPUT_READY); |
| omap_sham_read(dd, SHA_REG_CTRL); |
| |
| return omap_sham_irq_common(dd); |
| } |
| |
| static irqreturn_t omap_sham_irq_omap4(int irq, void *dev_id) |
| { |
| struct omap_sham_dev *dd = dev_id; |
| |
| omap_sham_write_mask(dd, SHA_REG_MASK(dd), 0, SHA_REG_MASK_IT_EN); |
| |
| return omap_sham_irq_common(dd); |
| } |
| |
| static struct omap_sham_algs_info omap_sham_algs_info_omap2[] = { |
| { |
| .algs_list = algs_sha1_md5, |
| .size = ARRAY_SIZE(algs_sha1_md5), |
| }, |
| }; |
| |
| static const struct omap_sham_pdata omap_sham_pdata_omap2 = { |
| .algs_info = omap_sham_algs_info_omap2, |
| .algs_info_size = ARRAY_SIZE(omap_sham_algs_info_omap2), |
| .flags = BIT(FLAGS_BE32_SHA1), |
| .digest_size = SHA1_DIGEST_SIZE, |
| .copy_hash = omap_sham_copy_hash_omap2, |
| .write_ctrl = omap_sham_write_ctrl_omap2, |
| .trigger = omap_sham_trigger_omap2, |
| .poll_irq = omap_sham_poll_irq_omap2, |
| .intr_hdlr = omap_sham_irq_omap2, |
| .idigest_ofs = 0x00, |
| .din_ofs = 0x1c, |
| .digcnt_ofs = 0x14, |
| .rev_ofs = 0x5c, |
| .mask_ofs = 0x60, |
| .sysstatus_ofs = 0x64, |
| .major_mask = 0xf0, |
| .major_shift = 4, |
| .minor_mask = 0x0f, |
| .minor_shift = 0, |
| }; |
| |
| #ifdef CONFIG_OF |
| static struct omap_sham_algs_info omap_sham_algs_info_omap4[] = { |
| { |
| .algs_list = algs_sha1_md5, |
| .size = ARRAY_SIZE(algs_sha1_md5), |
| }, |
| { |
| .algs_list = algs_sha224_sha256, |
| .size = ARRAY_SIZE(algs_sha224_sha256), |
| }, |
| }; |
| |
| static const struct omap_sham_pdata omap_sham_pdata_omap4 = { |
| .algs_info = omap_sham_algs_info_omap4, |
| .algs_info_size = ARRAY_SIZE(omap_sham_algs_info_omap4), |
| .flags = BIT(FLAGS_AUTO_XOR), |
| .digest_size = SHA256_DIGEST_SIZE, |
| .copy_hash = omap_sham_copy_hash_omap4, |
| .write_ctrl = omap_sham_write_ctrl_omap4, |
| .trigger = omap_sham_trigger_omap4, |
| .poll_irq = omap_sham_poll_irq_omap4, |
| .intr_hdlr = omap_sham_irq_omap4, |
| .idigest_ofs = 0x020, |
| .odigest_ofs = 0x0, |
| .din_ofs = 0x080, |
| .digcnt_ofs = 0x040, |
| .rev_ofs = 0x100, |
| .mask_ofs = 0x110, |
| .sysstatus_ofs = 0x114, |
| .mode_ofs = 0x44, |
| .length_ofs = 0x48, |
| .major_mask = 0x0700, |
| .major_shift = 8, |
| .minor_mask = 0x003f, |
| .minor_shift = 0, |
| }; |
| |
| static struct omap_sham_algs_info omap_sham_algs_info_omap5[] = { |
| { |
| .algs_list = algs_sha1_md5, |
| .size = ARRAY_SIZE(algs_sha1_md5), |
| }, |
| { |
| .algs_list = algs_sha224_sha256, |
| .size = ARRAY_SIZE(algs_sha224_sha256), |
| }, |
| { |
| .algs_list = algs_sha384_sha512, |
| .size = ARRAY_SIZE(algs_sha384_sha512), |
| }, |
| }; |
| |
| static const struct omap_sham_pdata omap_sham_pdata_omap5 = { |
| .algs_info = omap_sham_algs_info_omap5, |
| .algs_info_size = ARRAY_SIZE(omap_sham_algs_info_omap5), |
| .flags = BIT(FLAGS_AUTO_XOR), |
| .digest_size = SHA512_DIGEST_SIZE, |
| .copy_hash = omap_sham_copy_hash_omap4, |
| .write_ctrl = omap_sham_write_ctrl_omap4, |
| .trigger = omap_sham_trigger_omap4, |
| .poll_irq = omap_sham_poll_irq_omap4, |
| .intr_hdlr = omap_sham_irq_omap4, |
| .idigest_ofs = 0x240, |
| .odigest_ofs = 0x200, |
| .din_ofs = 0x080, |
| .digcnt_ofs = 0x280, |
| .rev_ofs = 0x100, |
| .mask_ofs = 0x110, |
| .sysstatus_ofs = 0x114, |
| .mode_ofs = 0x284, |
| .length_ofs = 0x288, |
| .major_mask = 0x0700, |
| .major_shift = 8, |
| .minor_mask = 0x003f, |
| .minor_shift = 0, |
| }; |
| |
| static const struct of_device_id omap_sham_of_match[] = { |
| { |
| .compatible = "ti,omap2-sham", |
| .data = &omap_sham_pdata_omap2, |
| }, |
| { |
| .compatible = "ti,omap3-sham", |
| .data = &omap_sham_pdata_omap2, |
| }, |
| { |
| .compatible = "ti,omap4-sham", |
| .data = &omap_sham_pdata_omap4, |
| }, |
| { |
| .compatible = "ti,omap5-sham", |
| .data = &omap_sham_pdata_omap5, |
| }, |
| {}, |
| }; |
| MODULE_DEVICE_TABLE(of, omap_sham_of_match); |
| |
| static int omap_sham_get_res_of(struct omap_sham_dev *dd, |
| struct device *dev, struct resource *res) |
| { |
| struct device_node *node = dev->of_node; |
| int err = 0; |
| |
| dd->pdata = of_device_get_match_data(dev); |
| if (!dd->pdata) { |
| 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->irq = irq_of_parse_and_map(node, 0); |
| if (!dd->irq) { |
| dev_err(dev, "can't translate OF irq value\n"); |
| err = -EINVAL; |
| goto err; |
| } |
| |
| err: |
| return err; |
| } |
| #else |
| static const struct of_device_id omap_sham_of_match[] = { |
| {}, |
| }; |
| |
| static int omap_sham_get_res_of(struct omap_sham_dev *dd, |
| struct device *dev, struct resource *res) |
| { |
| return -EINVAL; |
| } |
| #endif |
| |
| static int omap_sham_get_res_pdev(struct omap_sham_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 IRQ */ |
| dd->irq = platform_get_irq(pdev, 0); |
| if (dd->irq < 0) { |
| err = dd->irq; |
| goto err; |
| } |
| |
| /* Only OMAP2/3 can be non-DT */ |
| dd->pdata = &omap_sham_pdata_omap2; |
| |
| err: |
| return err; |
| } |
| |
| static ssize_t fallback_show(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| struct omap_sham_dev *dd = dev_get_drvdata(dev); |
| |
| return sprintf(buf, "%d\n", dd->fallback_sz); |
| } |
| |
| static ssize_t fallback_store(struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t size) |
| { |
| struct omap_sham_dev *dd = dev_get_drvdata(dev); |
| ssize_t status; |
| long value; |
| |
| status = kstrtol(buf, 0, &value); |
| if (status) |
| return status; |
| |
| /* HW accelerator only works with buffers > 9 */ |
| if (value < 9) { |
| dev_err(dev, "minimum fallback size 9\n"); |
| return -EINVAL; |
| } |
| |
| dd->fallback_sz = value; |
| |
| return size; |
| } |
| |
| static ssize_t queue_len_show(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| struct omap_sham_dev *dd = dev_get_drvdata(dev); |
| |
| return sprintf(buf, "%d\n", dd->queue.max_qlen); |
| } |
| |
| static ssize_t queue_len_store(struct device *dev, |
| struct device_attribute *attr, const char *buf, |
| size_t size) |
| { |
| struct omap_sham_dev *dd = dev_get_drvdata(dev); |
| ssize_t status; |
| long value; |
| unsigned long flags; |
| |
| status = kstrtol(buf, 0, &value); |
| if (status) |
| return status; |
| |
| if (value < 1) |
| return -EINVAL; |
| |
| /* |
| * Changing the queue size in fly is safe, if size becomes smaller |
| * than current size, it will just not accept new entries until |
| * it has shrank enough. |
| */ |
| spin_lock_irqsave(&dd->lock, flags); |
| dd->queue.max_qlen = value; |
| spin_unlock_irqrestore(&dd->lock, flags); |
| |
| return size; |
| } |
| |
| static DEVICE_ATTR_RW(queue_len); |
| static DEVICE_ATTR_RW(fallback); |
| |
| static struct attribute *omap_sham_attrs[] = { |
| &dev_attr_queue_len.attr, |
| &dev_attr_fallback.attr, |
| NULL, |
| }; |
| |
| static struct attribute_group omap_sham_attr_group = { |
| .attrs = omap_sham_attrs, |
| }; |
| |
| static int omap_sham_probe(struct platform_device *pdev) |
| { |
| struct omap_sham_dev *dd; |
| struct device *dev = &pdev->dev; |
| struct resource res; |
| dma_cap_mask_t mask; |
| int err, i, j; |
| u32 rev; |
| |
| dd = devm_kzalloc(dev, sizeof(struct omap_sham_dev), GFP_KERNEL); |
| if (dd == NULL) { |
| dev_err(dev, "unable to alloc data struct.\n"); |
| err = -ENOMEM; |
| goto data_err; |
| } |
| dd->dev = dev; |
| platform_set_drvdata(pdev, dd); |
| |
| INIT_LIST_HEAD(&dd->list); |
| spin_lock_init(&dd->lock); |
| tasklet_init(&dd->done_task, omap_sham_done_task, (unsigned long)dd); |
| crypto_init_queue(&dd->queue, OMAP_SHAM_QUEUE_LENGTH); |
| |
| err = (dev->of_node) ? omap_sham_get_res_of(dd, dev, &res) : |
| omap_sham_get_res_pdev(dd, pdev, &res); |
| if (err) |
| goto data_err; |
| |
| dd->io_base = devm_ioremap_resource(dev, &res); |
| if (IS_ERR(dd->io_base)) { |
| err = PTR_ERR(dd->io_base); |
| goto data_err; |
| } |
| dd->phys_base = res.start; |
| |
| err = devm_request_irq(dev, dd->irq, dd->pdata->intr_hdlr, |
| IRQF_TRIGGER_NONE, dev_name(dev), dd); |
| if (err) { |
| dev_err(dev, "unable to request irq %d, err = %d\n", |
| dd->irq, err); |
| goto data_err; |
| } |
| |
| dma_cap_zero(mask); |
| dma_cap_set(DMA_SLAVE, mask); |
| |
| dd->dma_lch = dma_request_chan(dev, "rx"); |
| if (IS_ERR(dd->dma_lch)) { |
| err = PTR_ERR(dd->dma_lch); |
| if (err == -EPROBE_DEFER) |
| goto data_err; |
| |
| dd->polling_mode = 1; |
| dev_dbg(dev, "using polling mode instead of dma\n"); |
| } |
| |
| dd->flags |= dd->pdata->flags; |
| |
| pm_runtime_use_autosuspend(dev); |
| pm_runtime_set_autosuspend_delay(dev, DEFAULT_AUTOSUSPEND_DELAY); |
| |
| dd->fallback_sz = OMAP_SHA_DMA_THRESHOLD; |
| |
| pm_runtime_enable(dev); |
| pm_runtime_irq_safe(dev); |
| |
| err = pm_runtime_get_sync(dev); |
| if (err < 0) { |
| dev_err(dev, "failed to get sync: %d\n", err); |
| goto err_pm; |
| } |
| |
| rev = omap_sham_read(dd, SHA_REG_REV(dd)); |
| pm_runtime_put_sync(&pdev->dev); |
| |
| dev_info(dev, "hw accel on OMAP rev %u.%u\n", |
| (rev & dd->pdata->major_mask) >> dd->pdata->major_shift, |
| (rev & dd->pdata->minor_mask) >> dd->pdata->minor_shift); |
| |
| spin_lock(&sham.lock); |
| list_add_tail(&dd->list, &sham.dev_list); |
| spin_unlock(&sham.lock); |
| |
| for (i = 0; i < dd->pdata->algs_info_size; i++) { |
| for (j = 0; j < dd->pdata->algs_info[i].size; j++) { |
| struct ahash_alg *alg; |
| |
| alg = &dd->pdata->algs_info[i].algs_list[j]; |
| alg->export = omap_sham_export; |
| alg->import = omap_sham_import; |
| alg->halg.statesize = sizeof(struct omap_sham_reqctx) + |
| BUFLEN; |
| err = crypto_register_ahash(alg); |
| if (err) |
| goto err_algs; |
| |
| dd->pdata->algs_info[i].registered++; |
| } |
| } |
| |
| err = sysfs_create_group(&dev->kobj, &omap_sham_attr_group); |
| if (err) { |
| dev_err(dev, "could not create sysfs device attrs\n"); |
| goto err_algs; |
| } |
| |
| 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_ahash( |
| &dd->pdata->algs_info[i].algs_list[j]); |
| err_pm: |
| pm_runtime_disable(dev); |
| if (!dd->polling_mode) |
| dma_release_channel(dd->dma_lch); |
| data_err: |
| dev_err(dev, "initialization failed.\n"); |
| |
| return err; |
| } |
| |
| static int omap_sham_remove(struct platform_device *pdev) |
| { |
| struct omap_sham_dev *dd; |
| int i, j; |
| |
| dd = platform_get_drvdata(pdev); |
| if (!dd) |
| return -ENODEV; |
| spin_lock(&sham.lock); |
| list_del(&dd->list); |
| spin_unlock(&sham.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_ahash( |
| &dd->pdata->algs_info[i].algs_list[j]); |
| tasklet_kill(&dd->done_task); |
| pm_runtime_disable(&pdev->dev); |
| |
| if (!dd->polling_mode) |
| dma_release_channel(dd->dma_lch); |
| |
| sysfs_remove_group(&dd->dev->kobj, &omap_sham_attr_group); |
| |
| return 0; |
| } |
| |
| #ifdef CONFIG_PM_SLEEP |
| static int omap_sham_suspend(struct device *dev) |
| { |
| pm_runtime_put_sync(dev); |
| return 0; |
| } |
| |
| static int omap_sham_resume(struct device *dev) |
| { |
| int err = pm_runtime_get_sync(dev); |
| if (err < 0) { |
| dev_err(dev, "failed to get sync: %d\n", err); |
| return err; |
| } |
| return 0; |
| } |
| #endif |
| |
| static SIMPLE_DEV_PM_OPS(omap_sham_pm_ops, omap_sham_suspend, omap_sham_resume); |
| |
| static struct platform_driver omap_sham_driver = { |
| .probe = omap_sham_probe, |
| .remove = omap_sham_remove, |
| .driver = { |
| .name = "omap-sham", |
| .pm = &omap_sham_pm_ops, |
| .of_match_table = omap_sham_of_match, |
| }, |
| }; |
| |
| module_platform_driver(omap_sham_driver); |
| |
| MODULE_DESCRIPTION("OMAP SHA1/MD5 hw acceleration support."); |
| MODULE_LICENSE("GPL v2"); |
| MODULE_AUTHOR("Dmitry Kasatkin"); |
| MODULE_ALIAS("platform:omap-sham"); |