From 6a702fa5339597f2f2bb466043fbb20f3e55e0ad Mon Sep 17 00:00:00 2001 From: Vic Wu Date: Mon, 7 Dec 2020 15:58:42 +0800 Subject: crypto: mediatek - remove obsolete driver The crypto mediatek driver has been replaced by the inside-secure driver now. Remove this driver to avoid having duplicate drivers. Signed-off-by: Vic Wu Acked-by: Ryder Lee Signed-off-by: Herbert Xu --- drivers/crypto/mediatek/mtk-platform.c | 586 --------------------------------- 1 file changed, 586 deletions(-) delete mode 100644 drivers/crypto/mediatek/mtk-platform.c (limited to 'drivers/crypto/mediatek/mtk-platform.c') diff --git a/drivers/crypto/mediatek/mtk-platform.c b/drivers/crypto/mediatek/mtk-platform.c deleted file mode 100644 index 9d878620e5c9..000000000000 --- a/drivers/crypto/mediatek/mtk-platform.c +++ /dev/null @@ -1,586 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * Driver for EIP97 cryptographic accelerator. - * - * Copyright (c) 2016 Ryder Lee - */ - -#include -#include -#include -#include -#include -#include -#include -#include "mtk-platform.h" - -#define MTK_BURST_SIZE_MSK GENMASK(7, 4) -#define MTK_BURST_SIZE(x) ((x) << 4) -#define MTK_DESC_SIZE(x) ((x) << 0) -#define MTK_DESC_OFFSET(x) ((x) << 16) -#define MTK_DESC_FETCH_SIZE(x) ((x) << 0) -#define MTK_DESC_FETCH_THRESH(x) ((x) << 16) -#define MTK_DESC_OVL_IRQ_EN BIT(25) -#define MTK_DESC_ATP_PRESENT BIT(30) - -#define MTK_DFSE_IDLE GENMASK(3, 0) -#define MTK_DFSE_THR_CTRL_EN BIT(30) -#define MTK_DFSE_THR_CTRL_RESET BIT(31) -#define MTK_DFSE_RING_ID(x) (((x) >> 12) & GENMASK(3, 0)) -#define MTK_DFSE_MIN_DATA(x) ((x) << 0) -#define MTK_DFSE_MAX_DATA(x) ((x) << 8) -#define MTK_DFE_MIN_CTRL(x) ((x) << 16) -#define MTK_DFE_MAX_CTRL(x) ((x) << 24) - -#define MTK_IN_BUF_MIN_THRESH(x) ((x) << 8) -#define MTK_IN_BUF_MAX_THRESH(x) ((x) << 12) -#define MTK_OUT_BUF_MIN_THRESH(x) ((x) << 0) -#define MTK_OUT_BUF_MAX_THRESH(x) ((x) << 4) -#define MTK_IN_TBUF_SIZE(x) (((x) >> 4) & GENMASK(3, 0)) -#define MTK_IN_DBUF_SIZE(x) (((x) >> 8) & GENMASK(3, 0)) -#define MTK_OUT_DBUF_SIZE(x) (((x) >> 16) & GENMASK(3, 0)) -#define MTK_CMD_FIFO_SIZE(x) (((x) >> 8) & GENMASK(3, 0)) -#define MTK_RES_FIFO_SIZE(x) (((x) >> 12) & GENMASK(3, 0)) - -#define MTK_PE_TK_LOC_AVL BIT(2) -#define MTK_PE_PROC_HELD BIT(14) -#define MTK_PE_TK_TIMEOUT_EN BIT(22) -#define MTK_PE_INPUT_DMA_ERR BIT(0) -#define MTK_PE_OUTPUT_DMA_ERR BIT(1) -#define MTK_PE_PKT_PORC_ERR BIT(2) -#define MTK_PE_PKT_TIMEOUT BIT(3) -#define MTK_PE_FATAL_ERR BIT(14) -#define MTK_PE_INPUT_DMA_ERR_EN BIT(16) -#define MTK_PE_OUTPUT_DMA_ERR_EN BIT(17) -#define MTK_PE_PKT_PORC_ERR_EN BIT(18) -#define MTK_PE_PKT_TIMEOUT_EN BIT(19) -#define MTK_PE_FATAL_ERR_EN BIT(30) -#define MTK_PE_INT_OUT_EN BIT(31) - -#define MTK_HIA_SIGNATURE ((u16)0x35ca) -#define MTK_HIA_DATA_WIDTH(x) (((x) >> 25) & GENMASK(1, 0)) -#define MTK_HIA_DMA_LENGTH(x) (((x) >> 20) & GENMASK(4, 0)) -#define MTK_CDR_STAT_CLR GENMASK(4, 0) -#define MTK_RDR_STAT_CLR GENMASK(7, 0) - -#define MTK_AIC_INT_MSK GENMASK(5, 0) -#define MTK_AIC_VER_MSK (GENMASK(15, 0) | GENMASK(27, 20)) -#define MTK_AIC_VER11 0x011036c9 -#define MTK_AIC_VER12 0x012036c9 -#define MTK_AIC_G_CLR GENMASK(30, 20) - -/** - * EIP97 is an integrated security subsystem to accelerate cryptographic - * functions and protocols to offload the host processor. - * Some important hardware modules are briefly introduced below: - * - * Host Interface Adapter(HIA) - the main interface between the host - * system and the hardware subsystem. It is responsible for attaching - * processing engine to the specific host bus interface and provides a - * standardized software view for off loading tasks to the engine. - * - * Command Descriptor Ring Manager(CDR Manager) - keeps track of how many - * CD the host has prepared in the CDR. It monitors the fill level of its - * CD-FIFO and if there's sufficient space for the next block of descriptors, - * then it fires off a DMA request to fetch a block of CDs. - * - * Data fetch engine(DFE) - It is responsible for parsing the CD and - * setting up the required control and packet data DMA transfers from - * system memory to the processing engine. - * - * Result Descriptor Ring Manager(RDR Manager) - same as CDR Manager, - * but target is result descriptors, Moreover, it also handles the RD - * updates under control of the DSE. For each packet data segment - * processed, the DSE triggers the RDR Manager to write the updated RD. - * If triggered to update, the RDR Manager sets up a DMA operation to - * copy the RD from the DSE to the correct location in the RDR. - * - * Data Store Engine(DSE) - It is responsible for parsing the prepared RD - * and setting up the required control and packet data DMA transfers from - * the processing engine to system memory. - * - * Advanced Interrupt Controllers(AICs) - receive interrupt request signals - * from various sources and combine them into one interrupt output. - * The AICs are used by: - * - One for the HIA global and processing engine interrupts. - * - The others for the descriptor ring interrupts. - */ - -/* Cryptographic engine capabilities */ -struct mtk_sys_cap { - /* host interface adapter */ - u32 hia_ver; - u32 hia_opt; - /* packet engine */ - u32 pkt_eng_opt; - /* global hardware */ - u32 hw_opt; -}; - -static void mtk_desc_ring_link(struct mtk_cryp *cryp, u32 mask) -{ - /* Assign rings to DFE/DSE thread and enable it */ - writel(MTK_DFSE_THR_CTRL_EN | mask, cryp->base + DFE_THR_CTRL); - writel(MTK_DFSE_THR_CTRL_EN | mask, cryp->base + DSE_THR_CTRL); -} - -static void mtk_dfe_dse_buf_setup(struct mtk_cryp *cryp, - struct mtk_sys_cap *cap) -{ - u32 width = MTK_HIA_DATA_WIDTH(cap->hia_opt) + 2; - u32 len = MTK_HIA_DMA_LENGTH(cap->hia_opt) - 1; - u32 ipbuf = min((u32)MTK_IN_DBUF_SIZE(cap->hw_opt) + width, len); - u32 opbuf = min((u32)MTK_OUT_DBUF_SIZE(cap->hw_opt) + width, len); - u32 itbuf = min((u32)MTK_IN_TBUF_SIZE(cap->hw_opt) + width, len); - - writel(MTK_DFSE_MIN_DATA(ipbuf - 1) | - MTK_DFSE_MAX_DATA(ipbuf) | - MTK_DFE_MIN_CTRL(itbuf - 1) | - MTK_DFE_MAX_CTRL(itbuf), - cryp->base + DFE_CFG); - - writel(MTK_DFSE_MIN_DATA(opbuf - 1) | - MTK_DFSE_MAX_DATA(opbuf), - cryp->base + DSE_CFG); - - writel(MTK_IN_BUF_MIN_THRESH(ipbuf - 1) | - MTK_IN_BUF_MAX_THRESH(ipbuf), - cryp->base + PE_IN_DBUF_THRESH); - - writel(MTK_IN_BUF_MIN_THRESH(itbuf - 1) | - MTK_IN_BUF_MAX_THRESH(itbuf), - cryp->base + PE_IN_TBUF_THRESH); - - writel(MTK_OUT_BUF_MIN_THRESH(opbuf - 1) | - MTK_OUT_BUF_MAX_THRESH(opbuf), - cryp->base + PE_OUT_DBUF_THRESH); - - writel(0, cryp->base + PE_OUT_TBUF_THRESH); - writel(0, cryp->base + PE_OUT_BUF_CTRL); -} - -static int mtk_dfe_dse_state_check(struct mtk_cryp *cryp) -{ - int ret = -EINVAL; - u32 val; - - /* Check for completion of all DMA transfers */ - val = readl(cryp->base + DFE_THR_STAT); - if (MTK_DFSE_RING_ID(val) == MTK_DFSE_IDLE) { - val = readl(cryp->base + DSE_THR_STAT); - if (MTK_DFSE_RING_ID(val) == MTK_DFSE_IDLE) - ret = 0; - } - - if (!ret) { - /* Take DFE/DSE thread out of reset */ - writel(0, cryp->base + DFE_THR_CTRL); - writel(0, cryp->base + DSE_THR_CTRL); - } else { - return -EBUSY; - } - - return 0; -} - -static int mtk_dfe_dse_reset(struct mtk_cryp *cryp) -{ - /* Reset DSE/DFE and correct system priorities for all rings. */ - writel(MTK_DFSE_THR_CTRL_RESET, cryp->base + DFE_THR_CTRL); - writel(0, cryp->base + DFE_PRIO_0); - writel(0, cryp->base + DFE_PRIO_1); - writel(0, cryp->base + DFE_PRIO_2); - writel(0, cryp->base + DFE_PRIO_3); - - writel(MTK_DFSE_THR_CTRL_RESET, cryp->base + DSE_THR_CTRL); - writel(0, cryp->base + DSE_PRIO_0); - writel(0, cryp->base + DSE_PRIO_1); - writel(0, cryp->base + DSE_PRIO_2); - writel(0, cryp->base + DSE_PRIO_3); - - return mtk_dfe_dse_state_check(cryp); -} - -static void mtk_cmd_desc_ring_setup(struct mtk_cryp *cryp, - int i, struct mtk_sys_cap *cap) -{ - /* Full descriptor that fits FIFO minus one */ - u32 count = - ((1 << MTK_CMD_FIFO_SIZE(cap->hia_opt)) / MTK_DESC_SZ) - 1; - - /* Temporarily disable external triggering */ - writel(0, cryp->base + CDR_CFG(i)); - - /* Clear CDR count */ - writel(MTK_CNT_RST, cryp->base + CDR_PREP_COUNT(i)); - writel(MTK_CNT_RST, cryp->base + CDR_PROC_COUNT(i)); - - writel(0, cryp->base + CDR_PREP_PNTR(i)); - writel(0, cryp->base + CDR_PROC_PNTR(i)); - writel(0, cryp->base + CDR_DMA_CFG(i)); - - /* Configure CDR host address space */ - writel(0, cryp->base + CDR_BASE_ADDR_HI(i)); - writel(cryp->ring[i]->cmd_dma, cryp->base + CDR_BASE_ADDR_LO(i)); - - writel(MTK_DESC_RING_SZ, cryp->base + CDR_RING_SIZE(i)); - - /* Clear and disable all CDR interrupts */ - writel(MTK_CDR_STAT_CLR, cryp->base + CDR_STAT(i)); - - /* - * Set command descriptor offset and enable additional - * token present in descriptor. - */ - writel(MTK_DESC_SIZE(MTK_DESC_SZ) | - MTK_DESC_OFFSET(MTK_DESC_OFF) | - MTK_DESC_ATP_PRESENT, - cryp->base + CDR_DESC_SIZE(i)); - - writel(MTK_DESC_FETCH_SIZE(count * MTK_DESC_OFF) | - MTK_DESC_FETCH_THRESH(count * MTK_DESC_SZ), - cryp->base + CDR_CFG(i)); -} - -static void mtk_res_desc_ring_setup(struct mtk_cryp *cryp, - int i, struct mtk_sys_cap *cap) -{ - u32 rndup = 2; - u32 count = ((1 << MTK_RES_FIFO_SIZE(cap->hia_opt)) / rndup) - 1; - - /* Temporarily disable external triggering */ - writel(0, cryp->base + RDR_CFG(i)); - - /* Clear RDR count */ - writel(MTK_CNT_RST, cryp->base + RDR_PREP_COUNT(i)); - writel(MTK_CNT_RST, cryp->base + RDR_PROC_COUNT(i)); - - writel(0, cryp->base + RDR_PREP_PNTR(i)); - writel(0, cryp->base + RDR_PROC_PNTR(i)); - writel(0, cryp->base + RDR_DMA_CFG(i)); - - /* Configure RDR host address space */ - writel(0, cryp->base + RDR_BASE_ADDR_HI(i)); - writel(cryp->ring[i]->res_dma, cryp->base + RDR_BASE_ADDR_LO(i)); - - writel(MTK_DESC_RING_SZ, cryp->base + RDR_RING_SIZE(i)); - writel(MTK_RDR_STAT_CLR, cryp->base + RDR_STAT(i)); - - /* - * RDR manager generates update interrupts on a per-completed-packet, - * and the rd_proc_thresh_irq interrupt is fired when proc_pkt_count - * for the RDR exceeds the number of packets. - */ - writel(MTK_RDR_PROC_THRESH | MTK_RDR_PROC_MODE, - cryp->base + RDR_THRESH(i)); - - /* - * Configure a threshold and time-out value for the processed - * result descriptors (or complete packets) that are written to - * the RDR. - */ - writel(MTK_DESC_SIZE(MTK_DESC_SZ) | MTK_DESC_OFFSET(MTK_DESC_OFF), - cryp->base + RDR_DESC_SIZE(i)); - - /* - * Configure HIA fetch size and fetch threshold that are used to - * fetch blocks of multiple descriptors. - */ - writel(MTK_DESC_FETCH_SIZE(count * MTK_DESC_OFF) | - MTK_DESC_FETCH_THRESH(count * rndup) | - MTK_DESC_OVL_IRQ_EN, - cryp->base + RDR_CFG(i)); -} - -static int mtk_packet_engine_setup(struct mtk_cryp *cryp) -{ - struct mtk_sys_cap cap; - int i, err; - u32 val; - - cap.hia_ver = readl(cryp->base + HIA_VERSION); - cap.hia_opt = readl(cryp->base + HIA_OPTIONS); - cap.hw_opt = readl(cryp->base + EIP97_OPTIONS); - - if (!(((u16)cap.hia_ver) == MTK_HIA_SIGNATURE)) - return -EINVAL; - - /* Configure endianness conversion method for master (DMA) interface */ - writel(0, cryp->base + EIP97_MST_CTRL); - - /* Set HIA burst size */ - val = readl(cryp->base + HIA_MST_CTRL); - val &= ~MTK_BURST_SIZE_MSK; - val |= MTK_BURST_SIZE(5); - writel(val, cryp->base + HIA_MST_CTRL); - - err = mtk_dfe_dse_reset(cryp); - if (err) { - dev_err(cryp->dev, "Failed to reset DFE and DSE.\n"); - return err; - } - - mtk_dfe_dse_buf_setup(cryp, &cap); - - /* Enable the 4 rings for the packet engines. */ - mtk_desc_ring_link(cryp, 0xf); - - for (i = 0; i < MTK_RING_MAX; i++) { - mtk_cmd_desc_ring_setup(cryp, i, &cap); - mtk_res_desc_ring_setup(cryp, i, &cap); - } - - writel(MTK_PE_TK_LOC_AVL | MTK_PE_PROC_HELD | MTK_PE_TK_TIMEOUT_EN, - cryp->base + PE_TOKEN_CTRL_STAT); - - /* Clear all pending interrupts */ - writel(MTK_AIC_G_CLR, cryp->base + AIC_G_ACK); - writel(MTK_PE_INPUT_DMA_ERR | MTK_PE_OUTPUT_DMA_ERR | - MTK_PE_PKT_PORC_ERR | MTK_PE_PKT_TIMEOUT | - MTK_PE_FATAL_ERR | MTK_PE_INPUT_DMA_ERR_EN | - MTK_PE_OUTPUT_DMA_ERR_EN | MTK_PE_PKT_PORC_ERR_EN | - MTK_PE_PKT_TIMEOUT_EN | MTK_PE_FATAL_ERR_EN | - MTK_PE_INT_OUT_EN, - cryp->base + PE_INTERRUPT_CTRL_STAT); - - return 0; -} - -static int mtk_aic_cap_check(struct mtk_cryp *cryp, int hw) -{ - u32 val; - - if (hw == MTK_RING_MAX) - val = readl(cryp->base + AIC_G_VERSION); - else - val = readl(cryp->base + AIC_VERSION(hw)); - - val &= MTK_AIC_VER_MSK; - if (val != MTK_AIC_VER11 && val != MTK_AIC_VER12) - return -ENXIO; - - if (hw == MTK_RING_MAX) - val = readl(cryp->base + AIC_G_OPTIONS); - else - val = readl(cryp->base + AIC_OPTIONS(hw)); - - val &= MTK_AIC_INT_MSK; - if (!val || val > 32) - return -ENXIO; - - return 0; -} - -static int mtk_aic_init(struct mtk_cryp *cryp, int hw) -{ - int err; - - err = mtk_aic_cap_check(cryp, hw); - if (err) - return err; - - /* Disable all interrupts and set initial configuration */ - if (hw == MTK_RING_MAX) { - writel(0, cryp->base + AIC_G_ENABLE_CTRL); - writel(0, cryp->base + AIC_G_POL_CTRL); - writel(0, cryp->base + AIC_G_TYPE_CTRL); - writel(0, cryp->base + AIC_G_ENABLE_SET); - } else { - writel(0, cryp->base + AIC_ENABLE_CTRL(hw)); - writel(0, cryp->base + AIC_POL_CTRL(hw)); - writel(0, cryp->base + AIC_TYPE_CTRL(hw)); - writel(0, cryp->base + AIC_ENABLE_SET(hw)); - } - - return 0; -} - -static int mtk_accelerator_init(struct mtk_cryp *cryp) -{ - int i, err; - - /* Initialize advanced interrupt controller(AIC) */ - for (i = 0; i < MTK_IRQ_NUM; i++) { - err = mtk_aic_init(cryp, i); - if (err) { - dev_err(cryp->dev, "Failed to initialize AIC.\n"); - return err; - } - } - - /* Initialize packet engine */ - err = mtk_packet_engine_setup(cryp); - if (err) { - dev_err(cryp->dev, "Failed to configure packet engine.\n"); - return err; - } - - return 0; -} - -static void mtk_desc_dma_free(struct mtk_cryp *cryp) -{ - int i; - - for (i = 0; i < MTK_RING_MAX; i++) { - dma_free_coherent(cryp->dev, MTK_DESC_RING_SZ, - cryp->ring[i]->res_base, - cryp->ring[i]->res_dma); - dma_free_coherent(cryp->dev, MTK_DESC_RING_SZ, - cryp->ring[i]->cmd_base, - cryp->ring[i]->cmd_dma); - kfree(cryp->ring[i]); - } -} - -static int mtk_desc_ring_alloc(struct mtk_cryp *cryp) -{ - struct mtk_ring **ring = cryp->ring; - int i; - - for (i = 0; i < MTK_RING_MAX; i++) { - ring[i] = kzalloc(sizeof(**ring), GFP_KERNEL); - if (!ring[i]) - goto err_cleanup; - - ring[i]->cmd_base = dma_alloc_coherent(cryp->dev, - MTK_DESC_RING_SZ, - &ring[i]->cmd_dma, - GFP_KERNEL); - if (!ring[i]->cmd_base) - goto err_cleanup; - - ring[i]->res_base = dma_alloc_coherent(cryp->dev, - MTK_DESC_RING_SZ, - &ring[i]->res_dma, - GFP_KERNEL); - if (!ring[i]->res_base) - goto err_cleanup; - - ring[i]->cmd_next = ring[i]->cmd_base; - ring[i]->res_next = ring[i]->res_base; - } - return 0; - -err_cleanup: - do { - dma_free_coherent(cryp->dev, MTK_DESC_RING_SZ, - ring[i]->res_base, ring[i]->res_dma); - dma_free_coherent(cryp->dev, MTK_DESC_RING_SZ, - ring[i]->cmd_base, ring[i]->cmd_dma); - kfree(ring[i]); - } while (i--); - return -ENOMEM; -} - -static int mtk_crypto_probe(struct platform_device *pdev) -{ - struct mtk_cryp *cryp; - int i, err; - - cryp = devm_kzalloc(&pdev->dev, sizeof(*cryp), GFP_KERNEL); - if (!cryp) - return -ENOMEM; - - cryp->base = devm_platform_ioremap_resource(pdev, 0); - if (IS_ERR(cryp->base)) - return PTR_ERR(cryp->base); - - for (i = 0; i < MTK_IRQ_NUM; i++) { - cryp->irq[i] = platform_get_irq(pdev, i); - if (cryp->irq[i] < 0) - return cryp->irq[i]; - } - - cryp->clk_cryp = devm_clk_get(&pdev->dev, "cryp"); - if (IS_ERR(cryp->clk_cryp)) - return -EPROBE_DEFER; - - cryp->dev = &pdev->dev; - pm_runtime_enable(cryp->dev); - pm_runtime_get_sync(cryp->dev); - - err = clk_prepare_enable(cryp->clk_cryp); - if (err) - goto err_clk_cryp; - - /* Allocate four command/result descriptor rings */ - err = mtk_desc_ring_alloc(cryp); - if (err) { - dev_err(cryp->dev, "Unable to allocate descriptor rings.\n"); - goto err_resource; - } - - /* Initialize hardware modules */ - err = mtk_accelerator_init(cryp); - if (err) { - dev_err(cryp->dev, "Failed to initialize cryptographic engine.\n"); - goto err_engine; - } - - err = mtk_cipher_alg_register(cryp); - if (err) { - dev_err(cryp->dev, "Unable to register cipher algorithm.\n"); - goto err_cipher; - } - - err = mtk_hash_alg_register(cryp); - if (err) { - dev_err(cryp->dev, "Unable to register hash algorithm.\n"); - goto err_hash; - } - - platform_set_drvdata(pdev, cryp); - return 0; - -err_hash: - mtk_cipher_alg_release(cryp); -err_cipher: - mtk_dfe_dse_reset(cryp); -err_engine: - mtk_desc_dma_free(cryp); -err_resource: - clk_disable_unprepare(cryp->clk_cryp); -err_clk_cryp: - pm_runtime_put_sync(cryp->dev); - pm_runtime_disable(cryp->dev); - - return err; -} - -static int mtk_crypto_remove(struct platform_device *pdev) -{ - struct mtk_cryp *cryp = platform_get_drvdata(pdev); - - mtk_hash_alg_release(cryp); - mtk_cipher_alg_release(cryp); - mtk_desc_dma_free(cryp); - - clk_disable_unprepare(cryp->clk_cryp); - - pm_runtime_put_sync(cryp->dev); - pm_runtime_disable(cryp->dev); - platform_set_drvdata(pdev, NULL); - - return 0; -} - -static const struct of_device_id of_crypto_id[] = { - { .compatible = "mediatek,eip97-crypto" }, - {}, -}; -MODULE_DEVICE_TABLE(of, of_crypto_id); - -static struct platform_driver mtk_crypto_driver = { - .probe = mtk_crypto_probe, - .remove = mtk_crypto_remove, - .driver = { - .name = "mtk-crypto", - .of_match_table = of_crypto_id, - }, -}; -module_platform_driver(mtk_crypto_driver); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Ryder Lee "); -MODULE_DESCRIPTION("Cryptographic accelerator driver for EIP97"); -- cgit