mirror of https://gitee.com/openkylin/linux.git
1291 lines
34 KiB
C
1291 lines
34 KiB
C
/**
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* AMCC SoC PPC4xx Crypto Driver
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*
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* Copyright (c) 2008 Applied Micro Circuits Corporation.
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* All rights reserved. James Hsiao <jhsiao@amcc.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* This file implements AMCC crypto offload Linux device driver for use with
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* Linux CryptoAPI.
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*/
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#include <linux/kernel.h>
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#include <linux/interrupt.h>
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#include <linux/spinlock_types.h>
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#include <linux/random.h>
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#include <linux/scatterlist.h>
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#include <linux/crypto.h>
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#include <linux/dma-mapping.h>
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#include <linux/platform_device.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/of_address.h>
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#include <linux/of_irq.h>
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#include <linux/of_platform.h>
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#include <linux/slab.h>
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#include <asm/dcr.h>
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#include <asm/dcr-regs.h>
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#include <asm/cacheflush.h>
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#include <crypto/aes.h>
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#include <crypto/sha.h>
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#include "crypto4xx_reg_def.h"
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#include "crypto4xx_core.h"
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#include "crypto4xx_sa.h"
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#include "crypto4xx_trng.h"
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#define PPC4XX_SEC_VERSION_STR "0.5"
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/**
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* PPC4xx Crypto Engine Initialization Routine
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*/
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static void crypto4xx_hw_init(struct crypto4xx_device *dev)
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{
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union ce_ring_size ring_size;
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union ce_ring_control ring_ctrl;
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union ce_part_ring_size part_ring_size;
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union ce_io_threshold io_threshold;
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u32 rand_num;
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union ce_pe_dma_cfg pe_dma_cfg;
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u32 device_ctrl;
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writel(PPC4XX_BYTE_ORDER, dev->ce_base + CRYPTO4XX_BYTE_ORDER_CFG);
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/* setup pe dma, include reset sg, pdr and pe, then release reset */
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pe_dma_cfg.w = 0;
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pe_dma_cfg.bf.bo_sgpd_en = 1;
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pe_dma_cfg.bf.bo_data_en = 0;
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pe_dma_cfg.bf.bo_sa_en = 1;
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pe_dma_cfg.bf.bo_pd_en = 1;
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pe_dma_cfg.bf.dynamic_sa_en = 1;
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pe_dma_cfg.bf.reset_sg = 1;
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pe_dma_cfg.bf.reset_pdr = 1;
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pe_dma_cfg.bf.reset_pe = 1;
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writel(pe_dma_cfg.w, dev->ce_base + CRYPTO4XX_PE_DMA_CFG);
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/* un reset pe,sg and pdr */
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pe_dma_cfg.bf.pe_mode = 0;
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pe_dma_cfg.bf.reset_sg = 0;
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pe_dma_cfg.bf.reset_pdr = 0;
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pe_dma_cfg.bf.reset_pe = 0;
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pe_dma_cfg.bf.bo_td_en = 0;
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writel(pe_dma_cfg.w, dev->ce_base + CRYPTO4XX_PE_DMA_CFG);
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writel(dev->pdr_pa, dev->ce_base + CRYPTO4XX_PDR_BASE);
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writel(dev->pdr_pa, dev->ce_base + CRYPTO4XX_RDR_BASE);
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writel(PPC4XX_PRNG_CTRL_AUTO_EN, dev->ce_base + CRYPTO4XX_PRNG_CTRL);
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get_random_bytes(&rand_num, sizeof(rand_num));
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writel(rand_num, dev->ce_base + CRYPTO4XX_PRNG_SEED_L);
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get_random_bytes(&rand_num, sizeof(rand_num));
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writel(rand_num, dev->ce_base + CRYPTO4XX_PRNG_SEED_H);
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ring_size.w = 0;
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ring_size.bf.ring_offset = PPC4XX_PD_SIZE;
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ring_size.bf.ring_size = PPC4XX_NUM_PD;
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writel(ring_size.w, dev->ce_base + CRYPTO4XX_RING_SIZE);
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ring_ctrl.w = 0;
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writel(ring_ctrl.w, dev->ce_base + CRYPTO4XX_RING_CTRL);
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device_ctrl = readl(dev->ce_base + CRYPTO4XX_DEVICE_CTRL);
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device_ctrl |= PPC4XX_DC_3DES_EN;
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writel(device_ctrl, dev->ce_base + CRYPTO4XX_DEVICE_CTRL);
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writel(dev->gdr_pa, dev->ce_base + CRYPTO4XX_GATH_RING_BASE);
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writel(dev->sdr_pa, dev->ce_base + CRYPTO4XX_SCAT_RING_BASE);
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part_ring_size.w = 0;
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part_ring_size.bf.sdr_size = PPC4XX_SDR_SIZE;
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part_ring_size.bf.gdr_size = PPC4XX_GDR_SIZE;
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writel(part_ring_size.w, dev->ce_base + CRYPTO4XX_PART_RING_SIZE);
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writel(PPC4XX_SD_BUFFER_SIZE, dev->ce_base + CRYPTO4XX_PART_RING_CFG);
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io_threshold.w = 0;
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io_threshold.bf.output_threshold = PPC4XX_OUTPUT_THRESHOLD;
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io_threshold.bf.input_threshold = PPC4XX_INPUT_THRESHOLD;
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writel(io_threshold.w, dev->ce_base + CRYPTO4XX_IO_THRESHOLD);
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writel(0, dev->ce_base + CRYPTO4XX_PDR_BASE_UADDR);
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writel(0, dev->ce_base + CRYPTO4XX_RDR_BASE_UADDR);
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writel(0, dev->ce_base + CRYPTO4XX_PKT_SRC_UADDR);
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writel(0, dev->ce_base + CRYPTO4XX_PKT_DEST_UADDR);
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writel(0, dev->ce_base + CRYPTO4XX_SA_UADDR);
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writel(0, dev->ce_base + CRYPTO4XX_GATH_RING_BASE_UADDR);
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writel(0, dev->ce_base + CRYPTO4XX_SCAT_RING_BASE_UADDR);
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/* un reset pe,sg and pdr */
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pe_dma_cfg.bf.pe_mode = 1;
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pe_dma_cfg.bf.reset_sg = 0;
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pe_dma_cfg.bf.reset_pdr = 0;
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pe_dma_cfg.bf.reset_pe = 0;
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pe_dma_cfg.bf.bo_td_en = 0;
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writel(pe_dma_cfg.w, dev->ce_base + CRYPTO4XX_PE_DMA_CFG);
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/*clear all pending interrupt*/
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writel(PPC4XX_INTERRUPT_CLR, dev->ce_base + CRYPTO4XX_INT_CLR);
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writel(PPC4XX_INT_DESCR_CNT, dev->ce_base + CRYPTO4XX_INT_DESCR_CNT);
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writel(PPC4XX_INT_DESCR_CNT, dev->ce_base + CRYPTO4XX_INT_DESCR_CNT);
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writel(PPC4XX_INT_CFG, dev->ce_base + CRYPTO4XX_INT_CFG);
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writel(PPC4XX_PD_DONE_INT, dev->ce_base + CRYPTO4XX_INT_EN);
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}
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int crypto4xx_alloc_sa(struct crypto4xx_ctx *ctx, u32 size)
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{
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ctx->sa_in = dma_alloc_coherent(ctx->dev->core_dev->device, size * 4,
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&ctx->sa_in_dma_addr, GFP_ATOMIC);
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if (ctx->sa_in == NULL)
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return -ENOMEM;
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ctx->sa_out = dma_alloc_coherent(ctx->dev->core_dev->device, size * 4,
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&ctx->sa_out_dma_addr, GFP_ATOMIC);
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if (ctx->sa_out == NULL) {
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dma_free_coherent(ctx->dev->core_dev->device, size * 4,
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ctx->sa_in, ctx->sa_in_dma_addr);
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return -ENOMEM;
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}
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memset(ctx->sa_in, 0, size * 4);
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memset(ctx->sa_out, 0, size * 4);
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ctx->sa_len = size;
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return 0;
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}
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void crypto4xx_free_sa(struct crypto4xx_ctx *ctx)
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{
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if (ctx->sa_in != NULL)
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dma_free_coherent(ctx->dev->core_dev->device, ctx->sa_len * 4,
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ctx->sa_in, ctx->sa_in_dma_addr);
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if (ctx->sa_out != NULL)
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dma_free_coherent(ctx->dev->core_dev->device, ctx->sa_len * 4,
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ctx->sa_out, ctx->sa_out_dma_addr);
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ctx->sa_in_dma_addr = 0;
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ctx->sa_out_dma_addr = 0;
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ctx->sa_len = 0;
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}
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u32 crypto4xx_alloc_state_record(struct crypto4xx_ctx *ctx)
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{
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ctx->state_record = dma_alloc_coherent(ctx->dev->core_dev->device,
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sizeof(struct sa_state_record),
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&ctx->state_record_dma_addr, GFP_ATOMIC);
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if (!ctx->state_record_dma_addr)
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return -ENOMEM;
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memset(ctx->state_record, 0, sizeof(struct sa_state_record));
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return 0;
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}
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void crypto4xx_free_state_record(struct crypto4xx_ctx *ctx)
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{
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if (ctx->state_record != NULL)
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dma_free_coherent(ctx->dev->core_dev->device,
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sizeof(struct sa_state_record),
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ctx->state_record,
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ctx->state_record_dma_addr);
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ctx->state_record_dma_addr = 0;
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}
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/**
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* alloc memory for the gather ring
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* no need to alloc buf for the ring
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* gdr_tail, gdr_head and gdr_count are initialized by this function
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*/
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static u32 crypto4xx_build_pdr(struct crypto4xx_device *dev)
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{
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int i;
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struct pd_uinfo *pd_uinfo;
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dev->pdr = dma_alloc_coherent(dev->core_dev->device,
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sizeof(struct ce_pd) * PPC4XX_NUM_PD,
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&dev->pdr_pa, GFP_ATOMIC);
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if (!dev->pdr)
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return -ENOMEM;
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dev->pdr_uinfo = kzalloc(sizeof(struct pd_uinfo) * PPC4XX_NUM_PD,
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GFP_KERNEL);
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if (!dev->pdr_uinfo) {
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dma_free_coherent(dev->core_dev->device,
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sizeof(struct ce_pd) * PPC4XX_NUM_PD,
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dev->pdr,
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dev->pdr_pa);
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return -ENOMEM;
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}
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memset(dev->pdr, 0, sizeof(struct ce_pd) * PPC4XX_NUM_PD);
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dev->shadow_sa_pool = dma_alloc_coherent(dev->core_dev->device,
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256 * PPC4XX_NUM_PD,
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&dev->shadow_sa_pool_pa,
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GFP_ATOMIC);
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if (!dev->shadow_sa_pool)
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return -ENOMEM;
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dev->shadow_sr_pool = dma_alloc_coherent(dev->core_dev->device,
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sizeof(struct sa_state_record) * PPC4XX_NUM_PD,
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&dev->shadow_sr_pool_pa, GFP_ATOMIC);
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if (!dev->shadow_sr_pool)
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return -ENOMEM;
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for (i = 0; i < PPC4XX_NUM_PD; i++) {
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pd_uinfo = (struct pd_uinfo *) (dev->pdr_uinfo +
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sizeof(struct pd_uinfo) * i);
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/* alloc 256 bytes which is enough for any kind of dynamic sa */
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pd_uinfo->sa_va = dev->shadow_sa_pool + 256 * i;
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pd_uinfo->sa_pa = dev->shadow_sa_pool_pa + 256 * i;
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/* alloc state record */
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pd_uinfo->sr_va = dev->shadow_sr_pool +
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sizeof(struct sa_state_record) * i;
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pd_uinfo->sr_pa = dev->shadow_sr_pool_pa +
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sizeof(struct sa_state_record) * i;
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}
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return 0;
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}
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static void crypto4xx_destroy_pdr(struct crypto4xx_device *dev)
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{
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if (dev->pdr != NULL)
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dma_free_coherent(dev->core_dev->device,
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sizeof(struct ce_pd) * PPC4XX_NUM_PD,
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dev->pdr, dev->pdr_pa);
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if (dev->shadow_sa_pool)
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dma_free_coherent(dev->core_dev->device, 256 * PPC4XX_NUM_PD,
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dev->shadow_sa_pool, dev->shadow_sa_pool_pa);
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if (dev->shadow_sr_pool)
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dma_free_coherent(dev->core_dev->device,
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sizeof(struct sa_state_record) * PPC4XX_NUM_PD,
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dev->shadow_sr_pool, dev->shadow_sr_pool_pa);
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kfree(dev->pdr_uinfo);
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}
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static u32 crypto4xx_get_pd_from_pdr_nolock(struct crypto4xx_device *dev)
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{
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u32 retval;
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u32 tmp;
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retval = dev->pdr_head;
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tmp = (dev->pdr_head + 1) % PPC4XX_NUM_PD;
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if (tmp == dev->pdr_tail)
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return ERING_WAS_FULL;
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dev->pdr_head = tmp;
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return retval;
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}
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static u32 crypto4xx_put_pd_to_pdr(struct crypto4xx_device *dev, u32 idx)
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{
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struct pd_uinfo *pd_uinfo;
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unsigned long flags;
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pd_uinfo = (struct pd_uinfo *)(dev->pdr_uinfo +
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sizeof(struct pd_uinfo) * idx);
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spin_lock_irqsave(&dev->core_dev->lock, flags);
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if (dev->pdr_tail != PPC4XX_LAST_PD)
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dev->pdr_tail++;
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else
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dev->pdr_tail = 0;
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pd_uinfo->state = PD_ENTRY_FREE;
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spin_unlock_irqrestore(&dev->core_dev->lock, flags);
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return 0;
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}
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static struct ce_pd *crypto4xx_get_pdp(struct crypto4xx_device *dev,
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dma_addr_t *pd_dma, u32 idx)
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{
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*pd_dma = dev->pdr_pa + sizeof(struct ce_pd) * idx;
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return dev->pdr + sizeof(struct ce_pd) * idx;
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}
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/**
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* alloc memory for the gather ring
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* no need to alloc buf for the ring
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* gdr_tail, gdr_head and gdr_count are initialized by this function
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*/
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static u32 crypto4xx_build_gdr(struct crypto4xx_device *dev)
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{
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dev->gdr = dma_alloc_coherent(dev->core_dev->device,
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sizeof(struct ce_gd) * PPC4XX_NUM_GD,
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&dev->gdr_pa, GFP_ATOMIC);
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if (!dev->gdr)
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return -ENOMEM;
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memset(dev->gdr, 0, sizeof(struct ce_gd) * PPC4XX_NUM_GD);
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return 0;
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}
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static inline void crypto4xx_destroy_gdr(struct crypto4xx_device *dev)
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{
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dma_free_coherent(dev->core_dev->device,
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sizeof(struct ce_gd) * PPC4XX_NUM_GD,
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dev->gdr, dev->gdr_pa);
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}
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/*
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* when this function is called.
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* preemption or interrupt must be disabled
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*/
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u32 crypto4xx_get_n_gd(struct crypto4xx_device *dev, int n)
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{
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u32 retval;
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u32 tmp;
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if (n >= PPC4XX_NUM_GD)
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return ERING_WAS_FULL;
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retval = dev->gdr_head;
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tmp = (dev->gdr_head + n) % PPC4XX_NUM_GD;
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if (dev->gdr_head > dev->gdr_tail) {
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if (tmp < dev->gdr_head && tmp >= dev->gdr_tail)
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return ERING_WAS_FULL;
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} else if (dev->gdr_head < dev->gdr_tail) {
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if (tmp < dev->gdr_head || tmp >= dev->gdr_tail)
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return ERING_WAS_FULL;
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}
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dev->gdr_head = tmp;
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return retval;
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}
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static u32 crypto4xx_put_gd_to_gdr(struct crypto4xx_device *dev)
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{
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unsigned long flags;
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spin_lock_irqsave(&dev->core_dev->lock, flags);
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if (dev->gdr_tail == dev->gdr_head) {
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spin_unlock_irqrestore(&dev->core_dev->lock, flags);
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return 0;
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}
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if (dev->gdr_tail != PPC4XX_LAST_GD)
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dev->gdr_tail++;
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else
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dev->gdr_tail = 0;
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spin_unlock_irqrestore(&dev->core_dev->lock, flags);
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return 0;
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}
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static inline struct ce_gd *crypto4xx_get_gdp(struct crypto4xx_device *dev,
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dma_addr_t *gd_dma, u32 idx)
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{
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*gd_dma = dev->gdr_pa + sizeof(struct ce_gd) * idx;
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return (struct ce_gd *) (dev->gdr + sizeof(struct ce_gd) * idx);
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}
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/**
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* alloc memory for the scatter ring
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* need to alloc buf for the ring
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* sdr_tail, sdr_head and sdr_count are initialized by this function
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*/
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static u32 crypto4xx_build_sdr(struct crypto4xx_device *dev)
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{
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int i;
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struct ce_sd *sd_array;
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/* alloc memory for scatter descriptor ring */
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dev->sdr = dma_alloc_coherent(dev->core_dev->device,
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sizeof(struct ce_sd) * PPC4XX_NUM_SD,
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&dev->sdr_pa, GFP_ATOMIC);
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if (!dev->sdr)
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return -ENOMEM;
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dev->scatter_buffer_size = PPC4XX_SD_BUFFER_SIZE;
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dev->scatter_buffer_va =
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dma_alloc_coherent(dev->core_dev->device,
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dev->scatter_buffer_size * PPC4XX_NUM_SD,
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&dev->scatter_buffer_pa, GFP_ATOMIC);
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if (!dev->scatter_buffer_va) {
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dma_free_coherent(dev->core_dev->device,
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sizeof(struct ce_sd) * PPC4XX_NUM_SD,
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dev->sdr, dev->sdr_pa);
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return -ENOMEM;
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}
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sd_array = dev->sdr;
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for (i = 0; i < PPC4XX_NUM_SD; i++) {
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sd_array[i].ptr = dev->scatter_buffer_pa +
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dev->scatter_buffer_size * i;
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}
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return 0;
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}
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static void crypto4xx_destroy_sdr(struct crypto4xx_device *dev)
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{
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if (dev->sdr != NULL)
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dma_free_coherent(dev->core_dev->device,
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sizeof(struct ce_sd) * PPC4XX_NUM_SD,
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dev->sdr, dev->sdr_pa);
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if (dev->scatter_buffer_va != NULL)
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dma_free_coherent(dev->core_dev->device,
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dev->scatter_buffer_size * PPC4XX_NUM_SD,
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dev->scatter_buffer_va,
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dev->scatter_buffer_pa);
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}
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|
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/*
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* when this function is called.
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* preemption or interrupt must be disabled
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*/
|
|
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);
|
|
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;
|
|
}
|
|
|
|
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 = sg_nents_for_len(src, datalen);
|
|
if ((int)num_gd < 0) {
|
|
dev_err(dev->core_dev->device, "Invalid number of src SG.\n");
|
|
return -EINVAL;
|
|
}
|
|
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;
|
|
|
|
switch (alg->cra_flags & CRYPTO_ALG_TYPE_MASK) {
|
|
default:
|
|
tfm->crt_ablkcipher.reqsize = sizeof(struct crypto4xx_ctx);
|
|
break;
|
|
case CRYPTO_ALG_TYPE_AHASH:
|
|
crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
|
|
sizeof(struct crypto4xx_ctx));
|
|
break;
|
|
}
|
|
|
|
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 crypto4xx_alg_common *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];
|
|
alg->dev = sec_dev;
|
|
|
|
switch (alg->alg.type) {
|
|
case CRYPTO_ALG_TYPE_AHASH:
|
|
rc = crypto_register_ahash(&alg->alg.u.hash);
|
|
break;
|
|
|
|
default:
|
|
rc = crypto_register_alg(&alg->alg.u.cipher);
|
|
break;
|
|
}
|
|
|
|
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);
|
|
switch (alg->alg.type) {
|
|
case CRYPTO_ALG_TYPE_AHASH:
|
|
crypto_unregister_ahash(&alg->alg.u.hash);
|
|
break;
|
|
|
|
default:
|
|
crypto_unregister_alg(&alg->alg.u.cipher);
|
|
}
|
|
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)
|
|
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 crypto4xx_alg_common crypto4xx_alg[] = {
|
|
/* Crypto AES modes */
|
|
{ .type = CRYPTO_ALG_TYPE_ABLKCIPHER, .u.cipher = {
|
|
.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_type = &crypto_ablkcipher_type,
|
|
.cra_init = crypto4xx_alg_init,
|
|
.cra_exit = crypto4xx_alg_exit,
|
|
.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,
|
|
}
|
|
}
|
|
}},
|
|
};
|
|
|
|
/**
|
|
* Module Initialization Routine
|
|
*/
|
|
static int crypto4xx_probe(struct platform_device *ofdev)
|
|
{
|
|
int rc;
|
|
struct resource res;
|
|
struct device *dev = &ofdev->dev;
|
|
struct crypto4xx_core_device *core_dev;
|
|
|
|
rc = of_address_to_resource(ofdev->dev.of_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);
|
|
rc = -ENOMEM;
|
|
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->dev.of_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->dev.of_node, 0);
|
|
if (!core_dev->dev->ce_base) {
|
|
dev_err(dev, "failed to of_iomap\n");
|
|
rc = -ENOMEM;
|
|
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;
|
|
|
|
ppc4xx_trng_probe(core_dev);
|
|
return 0;
|
|
|
|
err_start_dev:
|
|
iounmap(core_dev->dev->ce_base);
|
|
err_iomap:
|
|
free_irq(core_dev->irq, dev);
|
|
err_request_irq:
|
|
irq_dispose_mapping(core_dev->irq);
|
|
tasklet_kill(&core_dev->tasklet);
|
|
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 crypto4xx_remove(struct platform_device *ofdev)
|
|
{
|
|
struct device *dev = &ofdev->dev;
|
|
struct crypto4xx_core_device *core_dev = dev_get_drvdata(dev);
|
|
|
|
ppc4xx_trng_remove(core_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 const struct of_device_id crypto4xx_match[] = {
|
|
{ .compatible = "amcc,ppc4xx-crypto",},
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(of, crypto4xx_match);
|
|
|
|
static struct platform_driver crypto4xx_driver = {
|
|
.driver = {
|
|
.name = MODULE_NAME,
|
|
.of_match_table = crypto4xx_match,
|
|
},
|
|
.probe = crypto4xx_probe,
|
|
.remove = crypto4xx_remove,
|
|
};
|
|
|
|
module_platform_driver(crypto4xx_driver);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("James Hsiao <jhsiao@amcc.com>");
|
|
MODULE_DESCRIPTION("Driver for AMCC PPC4xx crypto accelerator");
|