--- /dev/null
+/**
+ * AMCC SoC PPC4xx Crypto Driver
+ *
+ * Copyright (c) 2008 Applied Micro Circuits Corporation.
+ * All rights reserved. James Hsiao <jhsiao@amcc.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * This file implements the Linux crypto algorithms.
+ */
+
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock_types.h>
+#include <linux/scatterlist.h>
+#include <linux/crypto.h>
+#include <linux/hash.h>
+#include <crypto/internal/hash.h>
+#include <linux/dma-mapping.h>
+#include <crypto/algapi.h>
+#include <crypto/aes.h>
+#include <crypto/sha.h>
+#include "crypto4xx_reg_def.h"
+#include "crypto4xx_sa.h"
+#include "crypto4xx_core.h"
+
+void set_dynamic_sa_command_0(struct dynamic_sa_ctl *sa, u32 save_h,
+ u32 save_iv, u32 ld_h, u32 ld_iv, u32 hdr_proc,
+ u32 h, u32 c, u32 pad_type, u32 op_grp, u32 op,
+ u32 dir)
+{
+ sa->sa_command_0.w = 0;
+ sa->sa_command_0.bf.save_hash_state = save_h;
+ sa->sa_command_0.bf.save_iv = save_iv;
+ sa->sa_command_0.bf.load_hash_state = ld_h;
+ sa->sa_command_0.bf.load_iv = ld_iv;
+ sa->sa_command_0.bf.hdr_proc = hdr_proc;
+ sa->sa_command_0.bf.hash_alg = h;
+ sa->sa_command_0.bf.cipher_alg = c;
+ sa->sa_command_0.bf.pad_type = pad_type & 3;
+ sa->sa_command_0.bf.extend_pad = pad_type >> 2;
+ sa->sa_command_0.bf.op_group = op_grp;
+ sa->sa_command_0.bf.opcode = op;
+ sa->sa_command_0.bf.dir = dir;
+}
+
+void set_dynamic_sa_command_1(struct dynamic_sa_ctl *sa, u32 cm, u32 hmac_mc,
+ u32 cfb, u32 esn, u32 sn_mask, u32 mute,
+ u32 cp_pad, u32 cp_pay, u32 cp_hdr)
+{
+ sa->sa_command_1.w = 0;
+ sa->sa_command_1.bf.crypto_mode31 = (cm & 4) >> 2;
+ sa->sa_command_1.bf.crypto_mode9_8 = cm & 3;
+ sa->sa_command_1.bf.feedback_mode = cfb,
+ sa->sa_command_1.bf.sa_rev = 1;
+ sa->sa_command_1.bf.extended_seq_num = esn;
+ sa->sa_command_1.bf.seq_num_mask = sn_mask;
+ sa->sa_command_1.bf.mutable_bit_proc = mute;
+ sa->sa_command_1.bf.copy_pad = cp_pad;
+ sa->sa_command_1.bf.copy_payload = cp_pay;
+ sa->sa_command_1.bf.copy_hdr = cp_hdr;
+}
+
+int crypto4xx_encrypt(struct ablkcipher_request *req)
+{
+ struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
+
+ ctx->direction = DIR_OUTBOUND;
+ ctx->hash_final = 0;
+ ctx->is_hash = 0;
+ ctx->pd_ctl = 0x1;
+
+ return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
+ req->nbytes, req->info,
+ get_dynamic_sa_iv_size(ctx));
+}
+
+int crypto4xx_decrypt(struct ablkcipher_request *req)
+{
+ struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
+
+ ctx->direction = DIR_INBOUND;
+ ctx->hash_final = 0;
+ ctx->is_hash = 0;
+ ctx->pd_ctl = 1;
+
+ return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
+ req->nbytes, req->info,
+ get_dynamic_sa_iv_size(ctx));
+}
+
+/**
+ * AES Functions
+ */
+static int crypto4xx_setkey_aes(struct crypto_ablkcipher *cipher,
+ const u8 *key,
+ unsigned int keylen,
+ unsigned char cm,
+ u8 fb)
+{
+ struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
+ struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
+ struct dynamic_sa_ctl *sa;
+ int rc;
+
+ if (keylen != AES_KEYSIZE_256 &&
+ keylen != AES_KEYSIZE_192 && keylen != AES_KEYSIZE_128) {
+ crypto_ablkcipher_set_flags(cipher,
+ CRYPTO_TFM_RES_BAD_KEY_LEN);
+ return -EINVAL;
+ }
+
+ /* Create SA */
+ if (ctx->sa_in_dma_addr || ctx->sa_out_dma_addr)
+ crypto4xx_free_sa(ctx);
+
+ rc = crypto4xx_alloc_sa(ctx, SA_AES128_LEN + (keylen-16) / 4);
+ if (rc)
+ return rc;
+
+ if (ctx->state_record_dma_addr == 0) {
+ rc = crypto4xx_alloc_state_record(ctx);
+ if (rc) {
+ crypto4xx_free_sa(ctx);
+ return rc;
+ }
+ }
+ /* Setup SA */
+ sa = (struct dynamic_sa_ctl *) ctx->sa_in;
+ ctx->hash_final = 0;
+
+ set_dynamic_sa_command_0(sa, SA_NOT_SAVE_HASH, SA_NOT_SAVE_IV,
+ SA_LOAD_HASH_FROM_SA, SA_LOAD_IV_FROM_STATE,
+ SA_NO_HEADER_PROC, SA_HASH_ALG_NULL,
+ SA_CIPHER_ALG_AES, SA_PAD_TYPE_ZERO,
+ SA_OP_GROUP_BASIC, SA_OPCODE_DECRYPT,
+ DIR_INBOUND);
+
+ set_dynamic_sa_command_1(sa, cm, SA_HASH_MODE_HASH,
+ fb, SA_EXTENDED_SN_OFF,
+ SA_SEQ_MASK_OFF, SA_MC_ENABLE,
+ SA_NOT_COPY_PAD, SA_NOT_COPY_PAYLOAD,
+ SA_NOT_COPY_HDR);
+ crypto4xx_memcpy_le(ctx->sa_in + get_dynamic_sa_offset_key_field(ctx),
+ key, keylen);
+ sa->sa_contents = SA_AES_CONTENTS | (keylen << 2);
+ sa->sa_command_1.bf.key_len = keylen >> 3;
+ ctx->is_hash = 0;
+ ctx->direction = DIR_INBOUND;
+ memcpy(ctx->sa_in + get_dynamic_sa_offset_state_ptr_field(ctx),
+ (void *)&ctx->state_record_dma_addr, 4);
+ ctx->offset_to_sr_ptr = get_dynamic_sa_offset_state_ptr_field(ctx);
+
+ memcpy(ctx->sa_out, ctx->sa_in, ctx->sa_len * 4);
+ sa = (struct dynamic_sa_ctl *) ctx->sa_out;
+ sa->sa_command_0.bf.dir = DIR_OUTBOUND;
+
+ return 0;
+}
+
+int crypto4xx_setkey_aes_cbc(struct crypto_ablkcipher *cipher,
+ const u8 *key, unsigned int keylen)
+{
+ return crypto4xx_setkey_aes(cipher, key, keylen, CRYPTO_MODE_CBC,
+ CRYPTO_FEEDBACK_MODE_NO_FB);
+}
+
+/**
+ * HASH SHA1 Functions
+ */
+static int crypto4xx_hash_alg_init(struct crypto_tfm *tfm,
+ unsigned int sa_len,
+ unsigned char ha,
+ unsigned char hm)
+{
+ struct crypto_alg *alg = tfm->__crt_alg;
+ struct crypto4xx_alg *my_alg = crypto_alg_to_crypto4xx_alg(alg);
+ struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
+ struct dynamic_sa_ctl *sa;
+ struct dynamic_sa_hash160 *sa_in;
+ int rc;
+
+ ctx->dev = my_alg->dev;
+ ctx->is_hash = 1;
+ ctx->hash_final = 0;
+
+ /* Create SA */
+ if (ctx->sa_in_dma_addr || ctx->sa_out_dma_addr)
+ crypto4xx_free_sa(ctx);
+
+ rc = crypto4xx_alloc_sa(ctx, sa_len);
+ if (rc)
+ return rc;
+
+ if (ctx->state_record_dma_addr == 0) {
+ crypto4xx_alloc_state_record(ctx);
+ if (!ctx->state_record_dma_addr) {
+ crypto4xx_free_sa(ctx);
+ return -ENOMEM;
+ }
+ }
+
+ tfm->crt_ahash.reqsize = sizeof(struct crypto4xx_ctx);
+ sa = (struct dynamic_sa_ctl *) ctx->sa_in;
+ set_dynamic_sa_command_0(sa, SA_SAVE_HASH, SA_NOT_SAVE_IV,
+ SA_NOT_LOAD_HASH, SA_LOAD_IV_FROM_SA,
+ SA_NO_HEADER_PROC, ha, SA_CIPHER_ALG_NULL,
+ SA_PAD_TYPE_ZERO, SA_OP_GROUP_BASIC,
+ SA_OPCODE_HASH, DIR_INBOUND);
+ set_dynamic_sa_command_1(sa, 0, SA_HASH_MODE_HASH,
+ CRYPTO_FEEDBACK_MODE_NO_FB, SA_EXTENDED_SN_OFF,
+ SA_SEQ_MASK_OFF, SA_MC_ENABLE,
+ SA_NOT_COPY_PAD, SA_NOT_COPY_PAYLOAD,
+ SA_NOT_COPY_HDR);
+ ctx->direction = DIR_INBOUND;
+ sa->sa_contents = SA_HASH160_CONTENTS;
+ sa_in = (struct dynamic_sa_hash160 *) ctx->sa_in;
+ /* Need to zero hash digest in SA */
+ memset(sa_in->inner_digest, 0, sizeof(sa_in->inner_digest));
+ memset(sa_in->outer_digest, 0, sizeof(sa_in->outer_digest));
+ sa_in->state_ptr = ctx->state_record_dma_addr;
+ ctx->offset_to_sr_ptr = get_dynamic_sa_offset_state_ptr_field(ctx);
+
+ return 0;
+}
+
+int crypto4xx_hash_init(struct ahash_request *req)
+{
+ struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
+ int ds;
+ struct dynamic_sa_ctl *sa;
+
+ sa = (struct dynamic_sa_ctl *) ctx->sa_in;
+ ds = crypto_ahash_digestsize(
+ __crypto_ahash_cast(req->base.tfm));
+ sa->sa_command_0.bf.digest_len = ds >> 2;
+ sa->sa_command_0.bf.load_hash_state = SA_LOAD_HASH_FROM_SA;
+ ctx->is_hash = 1;
+ ctx->direction = DIR_INBOUND;
+
+ return 0;
+}
+
+int crypto4xx_hash_update(struct ahash_request *req)
+{
+ struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
+
+ ctx->is_hash = 1;
+ ctx->hash_final = 0;
+ ctx->pd_ctl = 0x11;
+ ctx->direction = DIR_INBOUND;
+
+ return crypto4xx_build_pd(&req->base, ctx, req->src,
+ (struct scatterlist *) req->result,
+ req->nbytes, NULL, 0);
+}
+
+int crypto4xx_hash_final(struct ahash_request *req)
+{
+ return 0;
+}
+
+int crypto4xx_hash_digest(struct ahash_request *req)
+{
+ struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
+
+ ctx->hash_final = 1;
+ ctx->pd_ctl = 0x11;
+ ctx->direction = DIR_INBOUND;
+
+ return crypto4xx_build_pd(&req->base, ctx, req->src,
+ (struct scatterlist *) req->result,
+ req->nbytes, NULL, 0);
+}
+
+/**
+ * SHA1 Algorithm
+ */
+int crypto4xx_sha1_alg_init(struct crypto_tfm *tfm)
+{
+ return crypto4xx_hash_alg_init(tfm, SA_HASH160_LEN, SA_HASH_ALG_SHA1,
+ SA_HASH_MODE_HASH);
+}
+
+
--- /dev/null
+/**
+ * AMCC SoC PPC4xx Crypto Driver
+ *
+ * Copyright (c) 2008 Applied Micro Circuits Corporation.
+ * All rights reserved. James Hsiao <jhsiao@amcc.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * This file implements AMCC crypto offload Linux device driver for use with
+ * Linux CryptoAPI.
+ */
+
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock_types.h>
+#include <linux/random.h>
+#include <linux/scatterlist.h>
+#include <linux/crypto.h>
+#include <linux/dma-mapping.h>
+#include <linux/platform_device.h>
+#include <linux/init.h>
+#include <linux/of_platform.h>
+#include <asm/dcr.h>
+#include <asm/dcr-regs.h>
+#include <asm/cacheflush.h>
+#include <crypto/internal/hash.h>
+#include <crypto/algapi.h>
+#include <crypto/aes.h>
+#include <crypto/sha.h>
+#include "crypto4xx_reg_def.h"
+#include "crypto4xx_core.h"
+#include "crypto4xx_sa.h"
+
+#define PPC4XX_SEC_VERSION_STR "0.5"
+
+/**
+ * PPC4xx Crypto Engine Initialization Routine
+ */
+static void crypto4xx_hw_init(struct crypto4xx_device *dev)
+{
+ union ce_ring_size ring_size;
+ union ce_ring_contol ring_ctrl;
+ union ce_part_ring_size part_ring_size;
+ union ce_io_threshold io_threshold;
+ u32 rand_num;
+ union ce_pe_dma_cfg pe_dma_cfg;
+
+ writel(PPC4XX_BYTE_ORDER, dev->ce_base + CRYPTO4XX_BYTE_ORDER_CFG);
+ /* setup pe dma, include reset sg, pdr and pe, then release reset */
+ pe_dma_cfg.w = 0;
+ pe_dma_cfg.bf.bo_sgpd_en = 1;
+ pe_dma_cfg.bf.bo_data_en = 0;
+ pe_dma_cfg.bf.bo_sa_en = 1;
+ pe_dma_cfg.bf.bo_pd_en = 1;
+ pe_dma_cfg.bf.dynamic_sa_en = 1;
+ pe_dma_cfg.bf.reset_sg = 1;
+ pe_dma_cfg.bf.reset_pdr = 1;
+ pe_dma_cfg.bf.reset_pe = 1;
+ writel(pe_dma_cfg.w, dev->ce_base + CRYPTO4XX_PE_DMA_CFG);
+ /* un reset pe,sg and pdr */
+ pe_dma_cfg.bf.pe_mode = 0;
+ pe_dma_cfg.bf.reset_sg = 0;
+ pe_dma_cfg.bf.reset_pdr = 0;
+ pe_dma_cfg.bf.reset_pe = 0;
+ pe_dma_cfg.bf.bo_td_en = 0;
+ writel(pe_dma_cfg.w, dev->ce_base + CRYPTO4XX_PE_DMA_CFG);
+ writel(dev->pdr_pa, dev->ce_base + CRYPTO4XX_PDR_BASE);
+ writel(dev->pdr_pa, dev->ce_base + CRYPTO4XX_RDR_BASE);
+ writel(PPC4XX_PRNG_CTRL_AUTO_EN, dev->ce_base + CRYPTO4XX_PRNG_CTRL);
+ get_random_bytes(&rand_num, sizeof(rand_num));
+ writel(rand_num, dev->ce_base + CRYPTO4XX_PRNG_SEED_L);
+ get_random_bytes(&rand_num, sizeof(rand_num));
+ writel(rand_num, dev->ce_base + CRYPTO4XX_PRNG_SEED_H);
+ ring_size.w = 0;
+ ring_size.bf.ring_offset = PPC4XX_PD_SIZE;
+ ring_size.bf.ring_size = PPC4XX_NUM_PD;
+ writel(ring_size.w, dev->ce_base + CRYPTO4XX_RING_SIZE);
+ ring_ctrl.w = 0;
+ writel(ring_ctrl.w, dev->ce_base + CRYPTO4XX_RING_CTRL);
+ writel(PPC4XX_DC_3DES_EN, dev->ce_base + CRYPTO4XX_DEVICE_CTRL);
+ writel(dev->gdr_pa, dev->ce_base + CRYPTO4XX_GATH_RING_BASE);
+ writel(dev->sdr_pa, dev->ce_base + CRYPTO4XX_SCAT_RING_BASE);
+ part_ring_size.w = 0;
+ part_ring_size.bf.sdr_size = PPC4XX_SDR_SIZE;
+ part_ring_size.bf.gdr_size = PPC4XX_GDR_SIZE;
+ writel(part_ring_size.w, dev->ce_base + CRYPTO4XX_PART_RING_SIZE);
+ writel(PPC4XX_SD_BUFFER_SIZE, dev->ce_base + CRYPTO4XX_PART_RING_CFG);
+ io_threshold.w = 0;
+ io_threshold.bf.output_threshold = PPC4XX_OUTPUT_THRESHOLD;
+ io_threshold.bf.input_threshold = PPC4XX_INPUT_THRESHOLD;
+ writel(io_threshold.w, dev->ce_base + CRYPTO4XX_IO_THRESHOLD);
+ writel(0, dev->ce_base + CRYPTO4XX_PDR_BASE_UADDR);
+ writel(0, dev->ce_base + CRYPTO4XX_RDR_BASE_UADDR);
+ writel(0, dev->ce_base + CRYPTO4XX_PKT_SRC_UADDR);
+ writel(0, dev->ce_base + CRYPTO4XX_PKT_DEST_UADDR);
+ writel(0, dev->ce_base + CRYPTO4XX_SA_UADDR);
+ writel(0, dev->ce_base + CRYPTO4XX_GATH_RING_BASE_UADDR);
+ writel(0, dev->ce_base + CRYPTO4XX_SCAT_RING_BASE_UADDR);
+ /* un reset pe,sg and pdr */
+ pe_dma_cfg.bf.pe_mode = 1;
+ pe_dma_cfg.bf.reset_sg = 0;
+ pe_dma_cfg.bf.reset_pdr = 0;
+ pe_dma_cfg.bf.reset_pe = 0;
+ pe_dma_cfg.bf.bo_td_en = 0;
+ writel(pe_dma_cfg.w, dev->ce_base + CRYPTO4XX_PE_DMA_CFG);
+ /*clear all pending interrupt*/
+ writel(PPC4XX_INTERRUPT_CLR, dev->ce_base + CRYPTO4XX_INT_CLR);
+ writel(PPC4XX_INT_DESCR_CNT, dev->ce_base + CRYPTO4XX_INT_DESCR_CNT);
+ writel(PPC4XX_INT_DESCR_CNT, dev->ce_base + CRYPTO4XX_INT_DESCR_CNT);
+ writel(PPC4XX_INT_CFG, dev->ce_base + CRYPTO4XX_INT_CFG);
+ writel(PPC4XX_PD_DONE_INT, dev->ce_base + CRYPTO4XX_INT_EN);
+}
+
+int crypto4xx_alloc_sa(struct crypto4xx_ctx *ctx, u32 size)
+{
+ ctx->sa_in = dma_alloc_coherent(ctx->dev->core_dev->device, size * 4,
+ &ctx->sa_in_dma_addr, GFP_ATOMIC);
+ if (ctx->sa_in == NULL)
+ return -ENOMEM;
+
+ ctx->sa_out = dma_alloc_coherent(ctx->dev->core_dev->device, size * 4,
+ &ctx->sa_out_dma_addr, GFP_ATOMIC);
+ if (ctx->sa_out == NULL) {
+ dma_free_coherent(ctx->dev->core_dev->device,
+ ctx->sa_len * 4,
+ ctx->sa_in, ctx->sa_in_dma_addr);
+ return -ENOMEM;
+ }
+
+ memset(ctx->sa_in, 0, size * 4);
+ memset(ctx->sa_out, 0, size * 4);
+ ctx->sa_len = size;
+
+ return 0;
+}
+
+void crypto4xx_free_sa(struct crypto4xx_ctx *ctx)
+{
+ if (ctx->sa_in != NULL)
+ dma_free_coherent(ctx->dev->core_dev->device, ctx->sa_len * 4,
+ ctx->sa_in, ctx->sa_in_dma_addr);
+ if (ctx->sa_out != NULL)
+ dma_free_coherent(ctx->dev->core_dev->device, ctx->sa_len * 4,
+ ctx->sa_out, ctx->sa_out_dma_addr);
+
+ ctx->sa_in_dma_addr = 0;
+ ctx->sa_out_dma_addr = 0;
+ ctx->sa_len = 0;
+}
+
+u32 crypto4xx_alloc_state_record(struct crypto4xx_ctx *ctx)
+{
+ ctx->state_record = dma_alloc_coherent(ctx->dev->core_dev->device,
+ sizeof(struct sa_state_record),
+ &ctx->state_record_dma_addr, GFP_ATOMIC);
+ if (!ctx->state_record_dma_addr)
+ return -ENOMEM;
+ memset(ctx->state_record, 0, sizeof(struct sa_state_record));
+
+ return 0;
+}
+
+void crypto4xx_free_state_record(struct crypto4xx_ctx *ctx)
+{
+ if (ctx->state_record != NULL)
+ dma_free_coherent(ctx->dev->core_dev->device,
+ sizeof(struct sa_state_record),
+ ctx->state_record,
+ ctx->state_record_dma_addr);
+ ctx->state_record_dma_addr = 0;
+}
+
+/**
+ * alloc memory for the gather ring
+ * no need to alloc buf for the ring
+ * gdr_tail, gdr_head and gdr_count are initialized by this function
+ */
+static u32 crypto4xx_build_pdr(struct crypto4xx_device *dev)
+{
+ int i;
+ struct pd_uinfo *pd_uinfo;
+ dev->pdr = dma_alloc_coherent(dev->core_dev->device,
+ sizeof(struct ce_pd) * PPC4XX_NUM_PD,
+ &dev->pdr_pa, GFP_ATOMIC);
+ if (!dev->pdr)
+ return -ENOMEM;
+
+ dev->pdr_uinfo = kzalloc(sizeof(struct pd_uinfo) * PPC4XX_NUM_PD,
+ GFP_KERNEL);
+ if (!dev->pdr_uinfo) {
+ dma_free_coherent(dev->core_dev->device,
+ sizeof(struct ce_pd) * PPC4XX_NUM_PD,
+ dev->pdr,
+ dev->pdr_pa);
+ return -ENOMEM;
+ }
+ memset(dev->pdr, 0, sizeof(struct ce_pd) * PPC4XX_NUM_PD);
+ dev->shadow_sa_pool = dma_alloc_coherent(dev->core_dev->device,
+ 256 * PPC4XX_NUM_PD,
+ &dev->shadow_sa_pool_pa,
+ GFP_ATOMIC);
+ if (!dev->shadow_sa_pool)
+ return -ENOMEM;
+
+ dev->shadow_sr_pool = dma_alloc_coherent(dev->core_dev->device,
+ sizeof(struct sa_state_record) * PPC4XX_NUM_PD,
+ &dev->shadow_sr_pool_pa, GFP_ATOMIC);
+ if (!dev->shadow_sr_pool)
+ return -ENOMEM;
+ for (i = 0; i < PPC4XX_NUM_PD; i++) {
+ pd_uinfo = (struct pd_uinfo *) (dev->pdr_uinfo +
+ sizeof(struct pd_uinfo) * i);
+
+ /* alloc 256 bytes which is enough for any kind of dynamic sa */
+ pd_uinfo->sa_va = dev->shadow_sa_pool + 256 * i;
+ pd_uinfo->sa_pa = dev->shadow_sa_pool_pa + 256 * i;
+
+ /* alloc state record */
+ pd_uinfo->sr_va = dev->shadow_sr_pool +
+ sizeof(struct sa_state_record) * i;
+ pd_uinfo->sr_pa = dev->shadow_sr_pool_pa +
+ sizeof(struct sa_state_record) * i;
+ }
+
+ return 0;
+}
+
+static void crypto4xx_destroy_pdr(struct crypto4xx_device *dev)
+{
+ if (dev->pdr != NULL)
+ dma_free_coherent(dev->core_dev->device,
+ sizeof(struct ce_pd) * PPC4XX_NUM_PD,
+ dev->pdr, dev->pdr_pa);
+ if (dev->shadow_sa_pool)
+ dma_free_coherent(dev->core_dev->device, 256 * PPC4XX_NUM_PD,
+ dev->shadow_sa_pool, dev->shadow_sa_pool_pa);
+ if (dev->shadow_sr_pool)
+ dma_free_coherent(dev->core_dev->device,
+ sizeof(struct sa_state_record) * PPC4XX_NUM_PD,
+ dev->shadow_sr_pool, dev->shadow_sr_pool_pa);
+
+ kfree(dev->pdr_uinfo);
+}
+
+static u32 crypto4xx_get_pd_from_pdr_nolock(struct crypto4xx_device *dev)
+{
+ u32 retval;
+ u32 tmp;
+
+ retval = dev->pdr_head;
+ tmp = (dev->pdr_head + 1) % PPC4XX_NUM_PD;
+
+ if (tmp == dev->pdr_tail)
+ return ERING_WAS_FULL;
+
+ dev->pdr_head = tmp;
+
+ return retval;
+}
+
+static u32 crypto4xx_put_pd_to_pdr(struct crypto4xx_device *dev, u32 idx)
+{
+ struct pd_uinfo *pd_uinfo;
+ unsigned long flags;
+
+ pd_uinfo = (struct pd_uinfo *)(dev->pdr_uinfo +
+ sizeof(struct pd_uinfo) * idx);
+ spin_lock_irqsave(&dev->core_dev->lock, flags);
+ if (dev->pdr_tail != PPC4XX_LAST_PD)
+ dev->pdr_tail++;
+ else
+ dev->pdr_tail = 0;
+ pd_uinfo->state = PD_ENTRY_FREE;
+ spin_unlock_irqrestore(&dev->core_dev->lock, flags);
+
+ return 0;
+}
+
+static struct ce_pd *crypto4xx_get_pdp(struct crypto4xx_device *dev,
+ dma_addr_t *pd_dma, u32 idx)
+{
+ *pd_dma = dev->pdr_pa + sizeof(struct ce_pd) * idx;
+
+ return dev->pdr + sizeof(struct ce_pd) * idx;
+}
+
+/**
+ * alloc memory for the gather ring
+ * no need to alloc buf for the ring
+ * gdr_tail, gdr_head and gdr_count are initialized by this function
+ */
+static u32 crypto4xx_build_gdr(struct crypto4xx_device *dev)
+{
+ dev->gdr = dma_alloc_coherent(dev->core_dev->device,
+ sizeof(struct ce_gd) * PPC4XX_NUM_GD,
+ &dev->gdr_pa, GFP_ATOMIC);
+ if (!dev->gdr)
+ return -ENOMEM;
+
+ memset(dev->gdr, 0, sizeof(struct ce_gd) * PPC4XX_NUM_GD);
+
+ return 0;
+}
+
+static inline void crypto4xx_destroy_gdr(struct crypto4xx_device *dev)
+{
+ dma_free_coherent(dev->core_dev->device,
+ sizeof(struct ce_gd) * PPC4XX_NUM_GD,
+ dev->gdr, dev->gdr_pa);
+}
+
+/*
+ * when this function is called.
+ * preemption or interrupt must be disabled
+ */
+u32 crypto4xx_get_n_gd(struct crypto4xx_device *dev, int n)
+{
+ u32 retval;
+ u32 tmp;
+ if (n >= PPC4XX_NUM_GD)
+ return ERING_WAS_FULL;
+
+ retval = dev->gdr_head;
+ tmp = (dev->gdr_head + n) % PPC4XX_NUM_GD;
+ if (dev->gdr_head > dev->gdr_tail) {
+ if (tmp < dev->gdr_head && tmp >= dev->gdr_tail)
+ return ERING_WAS_FULL;
+ } else if (dev->gdr_head < dev->gdr_tail) {
+ if (tmp < dev->gdr_head || tmp >= dev->gdr_tail)
+ return ERING_WAS_FULL;
+ }
+ dev->gdr_head = tmp;
+
+ return retval;
+}
+
+static u32 crypto4xx_put_gd_to_gdr(struct crypto4xx_device *dev)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&dev->core_dev->lock, flags);
+ if (dev->gdr_tail == dev->gdr_head) {
+ spin_unlock_irqrestore(&dev->core_dev->lock, flags);
+ return 0;
+ }
+
+ if (dev->gdr_tail != PPC4XX_LAST_GD)
+ dev->gdr_tail++;
+ else
+ dev->gdr_tail = 0;
+
+ spin_unlock_irqrestore(&dev->core_dev->lock, flags);
+
+ return 0;
+}
+
+static inline struct ce_gd *crypto4xx_get_gdp(struct crypto4xx_device *dev,
+ dma_addr_t *gd_dma, u32 idx)
+{
+ *gd_dma = dev->gdr_pa + sizeof(struct ce_gd) * idx;
+
+ return (struct ce_gd *) (dev->gdr + sizeof(struct ce_gd) * idx);
+}
+
+/**
+ * alloc memory for the scatter ring
+ * need to alloc buf for the ring
+ * sdr_tail, sdr_head and sdr_count are initialized by this function
+ */
+static u32 crypto4xx_build_sdr(struct crypto4xx_device *dev)
+{
+ int i;
+ struct ce_sd *sd_array;
+
+ /* alloc memory for scatter descriptor ring */
+ dev->sdr = dma_alloc_coherent(dev->core_dev->device,
+ sizeof(struct ce_sd) * PPC4XX_NUM_SD,
+ &dev->sdr_pa, GFP_ATOMIC);
+ if (!dev->sdr)
+ return -ENOMEM;
+
+ dev->scatter_buffer_size = PPC4XX_SD_BUFFER_SIZE;
+ dev->scatter_buffer_va =
+ dma_alloc_coherent(dev->core_dev->device,
+ dev->scatter_buffer_size * PPC4XX_NUM_SD,
+ &dev->scatter_buffer_pa, GFP_ATOMIC);
+ if (!dev->scatter_buffer_va) {
+ dma_free_coherent(dev->core_dev->device,
+ sizeof(struct ce_sd) * PPC4XX_NUM_SD,
+ dev->sdr, dev->sdr_pa);
+ return -ENOMEM;
+ }
+
+ sd_array = dev->sdr;
+
+ for (i = 0; i < PPC4XX_NUM_SD; i++) {
+ sd_array[i].ptr = dev->scatter_buffer_pa +
+ dev->scatter_buffer_size * i;
+ }
+
+ return 0;
+}
+
+static void crypto4xx_destroy_sdr(struct crypto4xx_device *dev)
+{
+ if (dev->sdr != NULL)
+ dma_free_coherent(dev->core_dev->device,
+ sizeof(struct ce_sd) * PPC4XX_NUM_SD,
+ dev->sdr, dev->sdr_pa);
+
+ if (dev->scatter_buffer_va != NULL)
+ dma_free_coherent(dev->core_dev->device,
+ dev->scatter_buffer_size * PPC4XX_NUM_SD,
+ dev->scatter_buffer_va,
+ dev->scatter_buffer_pa);
+}
+
+/*
+ * when this function is called.
+ * preemption or interrupt must be disabled
+ */
+static u32 crypto4xx_get_n_sd(struct crypto4xx_device *dev, int n)
+{
+ u32 retval;
+ u32 tmp;
+
+ if (n >= PPC4XX_NUM_SD)
+ return ERING_WAS_FULL;
+
+ retval = dev->sdr_head;
+ tmp = (dev->sdr_head + n) % PPC4XX_NUM_SD;
+ if (dev->sdr_head > dev->gdr_tail) {
+ if (tmp < dev->sdr_head && tmp >= dev->sdr_tail)
+ return ERING_WAS_FULL;
+ } else if (dev->sdr_head < dev->sdr_tail) {
+ if (tmp < dev->sdr_head || tmp >= dev->sdr_tail)
+ return ERING_WAS_FULL;
+ } /* the head = tail, or empty case is already take cared */
+ dev->sdr_head = tmp;
+
+ return retval;
+}
+
+static u32 crypto4xx_put_sd_to_sdr(struct crypto4xx_device *dev)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&dev->core_dev->lock, flags);
+ if (dev->sdr_tail == dev->sdr_head) {
+ spin_unlock_irqrestore(&dev->core_dev->lock, flags);
+ return 0;
+ }
+ if (dev->sdr_tail != PPC4XX_LAST_SD)
+ dev->sdr_tail++;
+ else
+ dev->sdr_tail = 0;
+ spin_unlock_irqrestore(&dev->core_dev->lock, flags);
+
+ return 0;
+}
+
+static inline struct ce_sd *crypto4xx_get_sdp(struct crypto4xx_device *dev,
+ dma_addr_t *sd_dma, u32 idx)
+{
+ *sd_dma = dev->sdr_pa + sizeof(struct ce_sd) * idx;
+
+ return (struct ce_sd *)(dev->sdr + sizeof(struct ce_sd) * idx);
+}
+
+static u32 crypto4xx_fill_one_page(struct crypto4xx_device *dev,
+ dma_addr_t *addr, u32 *length,
+ u32 *idx, u32 *offset, u32 *nbytes)
+{
+ u32 len;
+
+ if (*length > dev->scatter_buffer_size) {
+ memcpy(phys_to_virt(*addr),
+ dev->scatter_buffer_va +
+ *idx * dev->scatter_buffer_size + *offset,
+ dev->scatter_buffer_size);
+ *offset = 0;
+ *length -= dev->scatter_buffer_size;
+ *nbytes -= dev->scatter_buffer_size;
+ if (*idx == PPC4XX_LAST_SD)
+ *idx = 0;
+ else
+ (*idx)++;
+ *addr = *addr + dev->scatter_buffer_size;
+ return 1;
+ } else if (*length < dev->scatter_buffer_size) {
+ memcpy(phys_to_virt(*addr),
+ dev->scatter_buffer_va +
+ *idx * dev->scatter_buffer_size + *offset, *length);
+ if ((*offset + *length) == dev->scatter_buffer_size) {
+ if (*idx == PPC4XX_LAST_SD)
+ *idx = 0;
+ else
+ (*idx)++;
+ *nbytes -= *length;
+ *offset = 0;
+ } else {
+ *nbytes -= *length;
+ *offset += *length;
+ }
+
+ return 0;
+ } else {
+ len = (*nbytes <= dev->scatter_buffer_size) ?
+ (*nbytes) : dev->scatter_buffer_size;
+ memcpy(phys_to_virt(*addr),
+ dev->scatter_buffer_va +
+ *idx * dev->scatter_buffer_size + *offset,
+ len);
+ *offset = 0;
+ *nbytes -= len;
+
+ if (*idx == PPC4XX_LAST_SD)
+ *idx = 0;
+ else
+ (*idx)++;
+
+ return 0;
+ }
+}
+
+static void crypto4xx_copy_pkt_to_dst(struct crypto4xx_device *dev,
+ struct ce_pd *pd,
+ struct pd_uinfo *pd_uinfo,
+ u32 nbytes,
+ struct scatterlist *dst)
+{
+ dma_addr_t addr;
+ u32 this_sd;
+ u32 offset;
+ u32 len;
+ u32 i;
+ u32 sg_len;
+ struct scatterlist *sg;
+
+ this_sd = pd_uinfo->first_sd;
+ offset = 0;
+ i = 0;
+
+ while (nbytes) {
+ sg = &dst[i];
+ sg_len = sg->length;
+ addr = dma_map_page(dev->core_dev->device, sg_page(sg),
+ sg->offset, sg->length, DMA_TO_DEVICE);
+
+ if (offset == 0) {
+ len = (nbytes <= sg->length) ? nbytes : sg->length;
+ while (crypto4xx_fill_one_page(dev, &addr, &len,
+ &this_sd, &offset, &nbytes))
+ ;
+ if (!nbytes)
+ return;
+ i++;
+ } else {
+ len = (nbytes <= (dev->scatter_buffer_size - offset)) ?
+ nbytes : (dev->scatter_buffer_size - offset);
+ len = (sg->length < len) ? sg->length : len;
+ while (crypto4xx_fill_one_page(dev, &addr, &len,
+ &this_sd, &offset, &nbytes))
+ ;
+ if (!nbytes)
+ return;
+ sg_len -= len;
+ if (sg_len) {
+ addr += len;
+ while (crypto4xx_fill_one_page(dev, &addr,
+ &sg_len, &this_sd, &offset, &nbytes))
+ ;
+ }
+ i++;
+ }
+ }
+}
+
+static u32 crypto4xx_copy_digest_to_dst(struct pd_uinfo *pd_uinfo,
+ struct crypto4xx_ctx *ctx)
+{
+ struct dynamic_sa_ctl *sa = (struct dynamic_sa_ctl *) ctx->sa_in;
+ struct sa_state_record *state_record =
+ (struct sa_state_record *) pd_uinfo->sr_va;
+
+ if (sa->sa_command_0.bf.hash_alg == SA_HASH_ALG_SHA1) {
+ memcpy((void *) pd_uinfo->dest_va, state_record->save_digest,
+ SA_HASH_ALG_SHA1_DIGEST_SIZE);
+ }
+
+ return 0;
+}
+
+static void crypto4xx_ret_sg_desc(struct crypto4xx_device *dev,
+ struct pd_uinfo *pd_uinfo)
+{
+ int i;
+ if (pd_uinfo->num_gd) {
+ for (i = 0; i < pd_uinfo->num_gd; i++)
+ crypto4xx_put_gd_to_gdr(dev);
+ pd_uinfo->first_gd = 0xffffffff;
+ pd_uinfo->num_gd = 0;
+ }
+ if (pd_uinfo->num_sd) {
+ for (i = 0; i < pd_uinfo->num_sd; i++)
+ crypto4xx_put_sd_to_sdr(dev);
+
+ pd_uinfo->first_sd = 0xffffffff;
+ pd_uinfo->num_sd = 0;
+ }
+}
+
+static u32 crypto4xx_ablkcipher_done(struct crypto4xx_device *dev,
+ struct pd_uinfo *pd_uinfo,
+ struct ce_pd *pd)
+{
+ struct crypto4xx_ctx *ctx;
+ struct ablkcipher_request *ablk_req;
+ struct scatterlist *dst;
+ dma_addr_t addr;
+
+ ablk_req = ablkcipher_request_cast(pd_uinfo->async_req);
+ ctx = crypto_tfm_ctx(ablk_req->base.tfm);
+
+ if (pd_uinfo->using_sd) {
+ crypto4xx_copy_pkt_to_dst(dev, pd, pd_uinfo, ablk_req->nbytes,
+ ablk_req->dst);
+ } else {
+ dst = pd_uinfo->dest_va;
+ addr = dma_map_page(dev->core_dev->device, sg_page(dst),
+ dst->offset, dst->length, DMA_FROM_DEVICE);
+ }
+ crypto4xx_ret_sg_desc(dev, pd_uinfo);
+ if (ablk_req->base.complete != NULL)
+ ablk_req->base.complete(&ablk_req->base, 0);
+
+ return 0;
+}
+
+static u32 crypto4xx_ahash_done(struct crypto4xx_device *dev,
+ struct pd_uinfo *pd_uinfo)
+{
+ struct crypto4xx_ctx *ctx;
+ struct ahash_request *ahash_req;
+
+ ahash_req = ahash_request_cast(pd_uinfo->async_req);
+ ctx = crypto_tfm_ctx(ahash_req->base.tfm);
+
+ crypto4xx_copy_digest_to_dst(pd_uinfo,
+ crypto_tfm_ctx(ahash_req->base.tfm));
+ crypto4xx_ret_sg_desc(dev, pd_uinfo);
+ /* call user provided callback function x */
+ if (ahash_req->base.complete != NULL)
+ ahash_req->base.complete(&ahash_req->base, 0);
+
+ return 0;
+}
+
+static u32 crypto4xx_pd_done(struct crypto4xx_device *dev, u32 idx)
+{
+ struct ce_pd *pd;
+ struct pd_uinfo *pd_uinfo;
+
+ pd = dev->pdr + sizeof(struct ce_pd)*idx;
+ pd_uinfo = dev->pdr_uinfo + sizeof(struct pd_uinfo)*idx;
+ if (crypto_tfm_alg_type(pd_uinfo->async_req->tfm) ==
+ CRYPTO_ALG_TYPE_ABLKCIPHER)
+ return crypto4xx_ablkcipher_done(dev, pd_uinfo, pd);
+ else
+ return crypto4xx_ahash_done(dev, pd_uinfo);
+}
+
+/**
+ * Note: Only use this function to copy items that is word aligned.
+ */
+void crypto4xx_memcpy_le(unsigned int *dst,
+ const unsigned char *buf,
+ int len)
+{
+ u8 *tmp;
+ for (; len >= 4; buf += 4, len -= 4)
+ *dst++ = cpu_to_le32(*(unsigned int *) buf);
+
+ tmp = (u8 *)dst;
+ switch (len) {
+ case 3:
+ *tmp++ = 0;
+ *tmp++ = *(buf+2);
+ *tmp++ = *(buf+1);
+ *tmp++ = *buf;
+ break;
+ case 2:
+ *tmp++ = 0;
+ *tmp++ = 0;
+ *tmp++ = *(buf+1);
+ *tmp++ = *buf;
+ break;
+ case 1:
+ *tmp++ = 0;
+ *tmp++ = 0;
+ *tmp++ = 0;
+ *tmp++ = *buf;
+ break;
+ default:
+ break;
+ }
+}
+
+static void crypto4xx_stop_all(struct crypto4xx_core_device *core_dev)
+{
+ crypto4xx_destroy_pdr(core_dev->dev);
+ crypto4xx_destroy_gdr(core_dev->dev);
+ crypto4xx_destroy_sdr(core_dev->dev);
+ dev_set_drvdata(core_dev->device, NULL);
+ iounmap(core_dev->dev->ce_base);
+ kfree(core_dev->dev);
+ kfree(core_dev);
+}
+
+void crypto4xx_return_pd(struct crypto4xx_device *dev,
+ u32 pd_entry, struct ce_pd *pd,
+ struct pd_uinfo *pd_uinfo)
+{
+ /* irq should be already disabled */
+ dev->pdr_head = pd_entry;
+ pd->pd_ctl.w = 0;
+ pd->pd_ctl_len.w = 0;
+ pd_uinfo->state = PD_ENTRY_FREE;
+}
+
+/*
+ * derive number of elements in scatterlist
+ * Shamlessly copy from talitos.c
+ */
+static int get_sg_count(struct scatterlist *sg_list, int nbytes)
+{
+ struct scatterlist *sg = sg_list;
+ int sg_nents = 0;
+
+ while (nbytes) {
+ sg_nents++;
+ if (sg->length > nbytes)
+ break;
+ nbytes -= sg->length;
+ sg = sg_next(sg);
+ }
+
+ return sg_nents;
+}
+
+static u32 get_next_gd(u32 current)
+{
+ if (current != PPC4XX_LAST_GD)
+ return current + 1;
+ else
+ return 0;
+}
+
+static u32 get_next_sd(u32 current)
+{
+ if (current != PPC4XX_LAST_SD)
+ return current + 1;
+ else
+ return 0;
+}
+
+u32 crypto4xx_build_pd(struct crypto_async_request *req,
+ struct crypto4xx_ctx *ctx,
+ struct scatterlist *src,
+ struct scatterlist *dst,
+ unsigned int datalen,
+ void *iv, u32 iv_len)
+{
+ struct crypto4xx_device *dev = ctx->dev;
+ dma_addr_t addr, pd_dma, sd_dma, gd_dma;
+ struct dynamic_sa_ctl *sa;
+ struct scatterlist *sg;
+ struct ce_gd *gd;
+ struct ce_pd *pd;
+ u32 num_gd, num_sd;
+ u32 fst_gd = 0xffffffff;
+ u32 fst_sd = 0xffffffff;
+ u32 pd_entry;
+ unsigned long flags;
+ struct pd_uinfo *pd_uinfo = NULL;
+ unsigned int nbytes = datalen, idx;
+ unsigned int ivlen = 0;
+ u32 gd_idx = 0;
+
+ /* figure how many gd is needed */
+ num_gd = get_sg_count(src, datalen);
+ if (num_gd == 1)
+ num_gd = 0;
+
+ /* figure how many sd is needed */
+ if (sg_is_last(dst) || ctx->is_hash) {
+ num_sd = 0;
+ } else {
+ if (datalen > PPC4XX_SD_BUFFER_SIZE) {
+ num_sd = datalen / PPC4XX_SD_BUFFER_SIZE;
+ if (datalen % PPC4XX_SD_BUFFER_SIZE)
+ num_sd++;
+ } else {
+ num_sd = 1;
+ }
+ }
+
+ /*
+ * The follow section of code needs to be protected
+ * The gather ring and scatter ring needs to be consecutive
+ * In case of run out of any kind of descriptor, the descriptor
+ * already got must be return the original place.
+ */
+ spin_lock_irqsave(&dev->core_dev->lock, flags);
+ if (num_gd) {
+ fst_gd = crypto4xx_get_n_gd(dev, num_gd);
+ if (fst_gd == ERING_WAS_FULL) {
+ spin_unlock_irqrestore(&dev->core_dev->lock, flags);
+ return -EAGAIN;
+ }
+ }
+ if (num_sd) {
+ fst_sd = crypto4xx_get_n_sd(dev, num_sd);
+ if (fst_sd == ERING_WAS_FULL) {
+ if (num_gd)
+ dev->gdr_head = fst_gd;
+ spin_unlock_irqrestore(&dev->core_dev->lock, flags);
+ return -EAGAIN;
+ }
+ }
+ pd_entry = crypto4xx_get_pd_from_pdr_nolock(dev);
+ if (pd_entry == ERING_WAS_FULL) {
+ if (num_gd)
+ dev->gdr_head = fst_gd;
+ if (num_sd)
+ dev->sdr_head = fst_sd;
+ spin_unlock_irqrestore(&dev->core_dev->lock, flags);
+ return -EAGAIN;
+ }
+ spin_unlock_irqrestore(&dev->core_dev->lock, flags);
+
+ pd_uinfo = (struct pd_uinfo *)(dev->pdr_uinfo +
+ sizeof(struct pd_uinfo) * pd_entry);
+ pd = crypto4xx_get_pdp(dev, &pd_dma, pd_entry);
+ pd_uinfo->async_req = req;
+ pd_uinfo->num_gd = num_gd;
+ pd_uinfo->num_sd = num_sd;
+
+ if (iv_len || ctx->is_hash) {
+ ivlen = iv_len;
+ pd->sa = pd_uinfo->sa_pa;
+ sa = (struct dynamic_sa_ctl *) pd_uinfo->sa_va;
+ if (ctx->direction == DIR_INBOUND)
+ memcpy(sa, ctx->sa_in, ctx->sa_len * 4);
+ else
+ memcpy(sa, ctx->sa_out, ctx->sa_len * 4);
+
+ memcpy((void *) sa + ctx->offset_to_sr_ptr,
+ &pd_uinfo->sr_pa, 4);
+
+ if (iv_len)
+ crypto4xx_memcpy_le(pd_uinfo->sr_va, iv, iv_len);
+ } else {
+ if (ctx->direction == DIR_INBOUND) {
+ pd->sa = ctx->sa_in_dma_addr;
+ sa = (struct dynamic_sa_ctl *) ctx->sa_in;
+ } else {
+ pd->sa = ctx->sa_out_dma_addr;
+ sa = (struct dynamic_sa_ctl *) ctx->sa_out;
+ }
+ }
+ pd->sa_len = ctx->sa_len;
+ if (num_gd) {
+ /* get first gd we are going to use */
+ gd_idx = fst_gd;
+ pd_uinfo->first_gd = fst_gd;
+ pd_uinfo->num_gd = num_gd;
+ gd = crypto4xx_get_gdp(dev, &gd_dma, gd_idx);
+ pd->src = gd_dma;
+ /* enable gather */
+ sa->sa_command_0.bf.gather = 1;
+ idx = 0;
+ src = &src[0];
+ /* walk the sg, and setup gather array */
+ while (nbytes) {
+ sg = &src[idx];
+ addr = dma_map_page(dev->core_dev->device, sg_page(sg),
+ sg->offset, sg->length, DMA_TO_DEVICE);
+ gd->ptr = addr;
+ gd->ctl_len.len = sg->length;
+ gd->ctl_len.done = 0;
+ gd->ctl_len.ready = 1;
+ if (sg->length >= nbytes)
+ break;
+ nbytes -= sg->length;
+ gd_idx = get_next_gd(gd_idx);
+ gd = crypto4xx_get_gdp(dev, &gd_dma, gd_idx);
+ idx++;
+ }
+ } else {
+ pd->src = (u32)dma_map_page(dev->core_dev->device, sg_page(src),
+ src->offset, src->length, DMA_TO_DEVICE);
+ /*
+ * Disable gather in sa command
+ */
+ sa->sa_command_0.bf.gather = 0;
+ /*
+ * Indicate gather array is not used
+ */
+ pd_uinfo->first_gd = 0xffffffff;
+ pd_uinfo->num_gd = 0;
+ }
+ if (ctx->is_hash || sg_is_last(dst)) {
+ /*
+ * we know application give us dst a whole piece of memory
+ * no need to use scatter ring.
+ * In case of is_hash, the icv is always at end of src data.
+ */
+ pd_uinfo->using_sd = 0;
+ pd_uinfo->first_sd = 0xffffffff;
+ pd_uinfo->num_sd = 0;
+ pd_uinfo->dest_va = dst;
+ sa->sa_command_0.bf.scatter = 0;
+ if (ctx->is_hash)
+ pd->dest = virt_to_phys((void *)dst);
+ else
+ pd->dest = (u32)dma_map_page(dev->core_dev->device,
+ sg_page(dst), dst->offset,
+ dst->length, DMA_TO_DEVICE);
+ } else {
+ struct ce_sd *sd = NULL;
+ u32 sd_idx = fst_sd;
+ nbytes = datalen;
+ sa->sa_command_0.bf.scatter = 1;
+ pd_uinfo->using_sd = 1;
+ pd_uinfo->dest_va = dst;
+ pd_uinfo->first_sd = fst_sd;
+ pd_uinfo->num_sd = num_sd;
+ sd = crypto4xx_get_sdp(dev, &sd_dma, sd_idx);
+ pd->dest = sd_dma;
+ /* setup scatter descriptor */
+ sd->ctl.done = 0;
+ sd->ctl.rdy = 1;
+ /* sd->ptr should be setup by sd_init routine*/
+ idx = 0;
+ if (nbytes >= PPC4XX_SD_BUFFER_SIZE)
+ nbytes -= PPC4XX_SD_BUFFER_SIZE;
+ else
+ nbytes = 0;
+ while (nbytes) {
+ sd_idx = get_next_sd(sd_idx);
+ sd = crypto4xx_get_sdp(dev, &sd_dma, sd_idx);
+ /* setup scatter descriptor */
+ sd->ctl.done = 0;
+ sd->ctl.rdy = 1;
+ if (nbytes >= PPC4XX_SD_BUFFER_SIZE)
+ nbytes -= PPC4XX_SD_BUFFER_SIZE;
+ else
+ /*
+ * SD entry can hold PPC4XX_SD_BUFFER_SIZE,
+ * which is more than nbytes, so done.
+ */
+ nbytes = 0;
+ }
+ }
+
+ sa->sa_command_1.bf.hash_crypto_offset = 0;
+ pd->pd_ctl.w = ctx->pd_ctl;
+ pd->pd_ctl_len.w = 0x00400000 | (ctx->bypass << 24) | datalen;
+ pd_uinfo->state = PD_ENTRY_INUSE;
+ wmb();
+ /* write any value to push engine to read a pd */
+ writel(1, dev->ce_base + CRYPTO4XX_INT_DESCR_RD);
+ return -EINPROGRESS;
+}
+
+/**
+ * Algorithm Registration Functions
+ */
+static int crypto4xx_alg_init(struct crypto_tfm *tfm)
+{
+ struct crypto_alg *alg = tfm->__crt_alg;
+ struct crypto4xx_alg *amcc_alg = crypto_alg_to_crypto4xx_alg(alg);
+ struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ ctx->dev = amcc_alg->dev;
+ ctx->sa_in = NULL;
+ ctx->sa_out = NULL;
+ ctx->sa_in_dma_addr = 0;
+ ctx->sa_out_dma_addr = 0;
+ ctx->sa_len = 0;
+
+ if (alg->cra_type == &crypto_ablkcipher_type)
+ tfm->crt_ablkcipher.reqsize = sizeof(struct crypto4xx_ctx);
+ else if (alg->cra_type == &crypto_ahash_type)
+ tfm->crt_ahash.reqsize = sizeof(struct crypto4xx_ctx);
+
+ return 0;
+}
+
+static void crypto4xx_alg_exit(struct crypto_tfm *tfm)
+{
+ struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ crypto4xx_free_sa(ctx);
+ crypto4xx_free_state_record(ctx);
+}
+
+int crypto4xx_register_alg(struct crypto4xx_device *sec_dev,
+ struct crypto_alg *crypto_alg, int array_size)
+{
+ struct crypto4xx_alg *alg;
+ int i;
+ int rc = 0;
+
+ for (i = 0; i < array_size; i++) {
+ alg = kzalloc(sizeof(struct crypto4xx_alg), GFP_KERNEL);
+ if (!alg)
+ return -ENOMEM;
+
+ alg->alg = crypto_alg[i];
+ INIT_LIST_HEAD(&alg->alg.cra_list);
+ if (alg->alg.cra_init == NULL)
+ alg->alg.cra_init = crypto4xx_alg_init;
+ if (alg->alg.cra_exit == NULL)
+ alg->alg.cra_exit = crypto4xx_alg_exit;
+ alg->dev = sec_dev;
+ rc = crypto_register_alg(&alg->alg);
+ if (rc) {
+ list_del(&alg->entry);
+ kfree(alg);
+ } else {
+ list_add_tail(&alg->entry, &sec_dev->alg_list);
+ }
+ }
+
+ return 0;
+}
+
+static void crypto4xx_unregister_alg(struct crypto4xx_device *sec_dev)
+{
+ struct crypto4xx_alg *alg, *tmp;
+
+ list_for_each_entry_safe(alg, tmp, &sec_dev->alg_list, entry) {
+ list_del(&alg->entry);
+ crypto_unregister_alg(&alg->alg);
+ kfree(alg);
+ }
+}
+
+static void crypto4xx_bh_tasklet_cb(unsigned long data)
+{
+ struct device *dev = (struct device *)data;
+ struct crypto4xx_core_device *core_dev = dev_get_drvdata(dev);
+ struct pd_uinfo *pd_uinfo;
+ struct ce_pd *pd;
+ u32 tail;
+
+ while (core_dev->dev->pdr_head != core_dev->dev->pdr_tail) {
+ tail = core_dev->dev->pdr_tail;
+ pd_uinfo = core_dev->dev->pdr_uinfo +
+ sizeof(struct pd_uinfo)*tail;
+ pd = core_dev->dev->pdr + sizeof(struct ce_pd) * tail;
+ if ((pd_uinfo->state == PD_ENTRY_INUSE) &&
+ pd->pd_ctl.bf.pe_done &&
+ !pd->pd_ctl.bf.host_ready) {
+ pd->pd_ctl.bf.pe_done = 0;
+ crypto4xx_pd_done(core_dev->dev, tail);
+ crypto4xx_put_pd_to_pdr(core_dev->dev, tail);
+ pd_uinfo->state = PD_ENTRY_FREE;
+ } else {
+ /* if tail not done, break */
+ break;
+ }
+ }
+}
+
+/**
+ * Top Half of isr.
+ */
+static irqreturn_t crypto4xx_ce_interrupt_handler(int irq, void *data)
+{
+ struct device *dev = (struct device *)data;
+ struct crypto4xx_core_device *core_dev = dev_get_drvdata(dev);
+
+ if (core_dev->dev->ce_base == 0)
+ return 0;
+
+ writel(PPC4XX_INTERRUPT_CLR,
+ core_dev->dev->ce_base + CRYPTO4XX_INT_CLR);
+ tasklet_schedule(&core_dev->tasklet);
+
+ return IRQ_HANDLED;
+}
+
+/**
+ * Supported Crypto Algorithms
+ */
+struct crypto_alg crypto4xx_alg[] = {
+ /* Crypto AES modes */
+ {
+ .cra_name = "cbc(aes)",
+ .cra_driver_name = "cbc-aes-ppc4xx",
+ .cra_priority = CRYPTO4XX_CRYPTO_PRIORITY,
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
+ .cra_blocksize = AES_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct crypto4xx_ctx),
+ .cra_alignmask = 0,
+ .cra_type = &crypto_ablkcipher_type,
+ .cra_module = THIS_MODULE,
+ .cra_u = {
+ .ablkcipher = {
+ .min_keysize = AES_MIN_KEY_SIZE,
+ .max_keysize = AES_MAX_KEY_SIZE,
+ .ivsize = AES_IV_SIZE,
+ .setkey = crypto4xx_setkey_aes_cbc,
+ .encrypt = crypto4xx_encrypt,
+ .decrypt = crypto4xx_decrypt,
+ }
+ }
+ },
+ /* Hash SHA1 */
+ {
+ .cra_name = "sha1",
+ .cra_driver_name = "sha1-ppc4xx",
+ .cra_priority = CRYPTO4XX_CRYPTO_PRIORITY,
+ .cra_flags = CRYPTO_ALG_TYPE_AHASH | CRYPTO_ALG_ASYNC,
+ .cra_blocksize = SHA1_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct crypto4xx_ctx),
+ .cra_alignmask = 0,
+ .cra_type = &crypto_ahash_type,
+ .cra_init = crypto4xx_sha1_alg_init,
+ .cra_module = THIS_MODULE,
+ .cra_u = {
+ .ahash = {
+ .digestsize = SHA1_DIGEST_SIZE,
+ .init = crypto4xx_hash_init,
+ .update = crypto4xx_hash_update,
+ .final = crypto4xx_hash_final,
+ .digest = crypto4xx_hash_digest,
+ }
+ }
+ },
+};
+
+/**
+ * Module Initialization Routine
+ */
+static int __init crypto4xx_probe(struct of_device *ofdev,
+ const struct of_device_id *match)
+{
+ int rc;
+ struct resource res;
+ struct device *dev = &ofdev->dev;
+ struct crypto4xx_core_device *core_dev;
+
+ rc = of_address_to_resource(ofdev->node, 0, &res);
+ if (rc)
+ return -ENODEV;
+
+ if (of_find_compatible_node(NULL, NULL, "amcc,ppc460ex-crypto")) {
+ mtdcri(SDR0, PPC460EX_SDR0_SRST,
+ mfdcri(SDR0, PPC460EX_SDR0_SRST) | PPC460EX_CE_RESET);
+ mtdcri(SDR0, PPC460EX_SDR0_SRST,
+ mfdcri(SDR0, PPC460EX_SDR0_SRST) & ~PPC460EX_CE_RESET);
+ } else if (of_find_compatible_node(NULL, NULL,
+ "amcc,ppc405ex-crypto")) {
+ mtdcri(SDR0, PPC405EX_SDR0_SRST,
+ mfdcri(SDR0, PPC405EX_SDR0_SRST) | PPC405EX_CE_RESET);
+ mtdcri(SDR0, PPC405EX_SDR0_SRST,
+ mfdcri(SDR0, PPC405EX_SDR0_SRST) & ~PPC405EX_CE_RESET);
+ } else if (of_find_compatible_node(NULL, NULL,
+ "amcc,ppc460sx-crypto")) {
+ mtdcri(SDR0, PPC460SX_SDR0_SRST,
+ mfdcri(SDR0, PPC460SX_SDR0_SRST) | PPC460SX_CE_RESET);
+ mtdcri(SDR0, PPC460SX_SDR0_SRST,
+ mfdcri(SDR0, PPC460SX_SDR0_SRST) & ~PPC460SX_CE_RESET);
+ } else {
+ printk(KERN_ERR "Crypto Function Not supported!\n");
+ return -EINVAL;
+ }
+
+ core_dev = kzalloc(sizeof(struct crypto4xx_core_device), GFP_KERNEL);
+ if (!core_dev)
+ return -ENOMEM;
+
+ dev_set_drvdata(dev, core_dev);
+ core_dev->ofdev = ofdev;
+ core_dev->dev = kzalloc(sizeof(struct crypto4xx_device), GFP_KERNEL);
+ if (!core_dev->dev)
+ goto err_alloc_dev;
+
+ core_dev->dev->core_dev = core_dev;
+ core_dev->device = dev;
+ spin_lock_init(&core_dev->lock);
+ INIT_LIST_HEAD(&core_dev->dev->alg_list);
+ rc = crypto4xx_build_pdr(core_dev->dev);
+ if (rc)
+ goto err_build_pdr;
+
+ rc = crypto4xx_build_gdr(core_dev->dev);
+ if (rc)
+ goto err_build_gdr;
+
+ rc = crypto4xx_build_sdr(core_dev->dev);
+ if (rc)
+ goto err_build_sdr;
+
+ /* Init tasklet for bottom half processing */
+ tasklet_init(&core_dev->tasklet, crypto4xx_bh_tasklet_cb,
+ (unsigned long) dev);
+
+ /* Register for Crypto isr, Crypto Engine IRQ */
+ core_dev->irq = irq_of_parse_and_map(ofdev->node, 0);
+ rc = request_irq(core_dev->irq, crypto4xx_ce_interrupt_handler, 0,
+ core_dev->dev->name, dev);
+ if (rc)
+ goto err_request_irq;
+
+ core_dev->dev->ce_base = of_iomap(ofdev->node, 0);
+ if (!core_dev->dev->ce_base) {
+ dev_err(dev, "failed to of_iomap\n");
+ goto err_iomap;
+ }
+
+ /* need to setup pdr, rdr, gdr and sdr before this */
+ crypto4xx_hw_init(core_dev->dev);
+
+ /* Register security algorithms with Linux CryptoAPI */
+ rc = crypto4xx_register_alg(core_dev->dev, crypto4xx_alg,
+ ARRAY_SIZE(crypto4xx_alg));
+ if (rc)
+ goto err_start_dev;
+
+ return 0;
+
+err_start_dev:
+ iounmap(core_dev->dev->ce_base);
+err_iomap:
+ free_irq(core_dev->irq, dev);
+ irq_dispose_mapping(core_dev->irq);
+ tasklet_kill(&core_dev->tasklet);
+err_request_irq:
+ crypto4xx_destroy_sdr(core_dev->dev);
+err_build_sdr:
+ crypto4xx_destroy_gdr(core_dev->dev);
+err_build_gdr:
+ crypto4xx_destroy_pdr(core_dev->dev);
+err_build_pdr:
+ kfree(core_dev->dev);
+err_alloc_dev:
+ kfree(core_dev);
+
+ return rc;
+}
+
+static int __exit crypto4xx_remove(struct of_device *ofdev)
+{
+ struct device *dev = &ofdev->dev;
+ struct crypto4xx_core_device *core_dev = dev_get_drvdata(dev);
+
+ free_irq(core_dev->irq, dev);
+ irq_dispose_mapping(core_dev->irq);
+
+ tasklet_kill(&core_dev->tasklet);
+ /* Un-register with Linux CryptoAPI */
+ crypto4xx_unregister_alg(core_dev->dev);
+ /* Free all allocated memory */
+ crypto4xx_stop_all(core_dev);
+
+ return 0;
+}
+
+static struct of_device_id crypto4xx_match[] = {
+ { .compatible = "amcc,ppc4xx-crypto",},
+ { },
+};
+
+static struct of_platform_driver crypto4xx_driver = {
+ .name = "crypto4xx",
+ .match_table = crypto4xx_match,
+ .probe = crypto4xx_probe,
+ .remove = crypto4xx_remove,
+};
+
+static int __init crypto4xx_init(void)
+{
+ return of_register_platform_driver(&crypto4xx_driver);
+}
+
+static void __exit crypto4xx_exit(void)
+{
+ of_unregister_platform_driver(&crypto4xx_driver);
+}
+
+module_init(crypto4xx_init);
+module_exit(crypto4xx_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("James Hsiao <jhsiao@amcc.com>");
+MODULE_DESCRIPTION("Driver for AMCC PPC4xx crypto accelerator");
+
projects / linux-2.6-omap-h63xx.git / commitdiff