diff options
Diffstat (limited to 'drivers/crypto/caam/ctrl.c')
| -rw-r--r-- | drivers/crypto/caam/ctrl.c | 907 |
1 files changed, 907 insertions, 0 deletions
diff --git a/drivers/crypto/caam/ctrl.c b/drivers/crypto/caam/ctrl.c new file mode 100644 index 000000000..538c01f42 --- /dev/null +++ b/drivers/crypto/caam/ctrl.c @@ -0,0 +1,907 @@ +/* * CAAM control-plane driver backend + * Controller-level driver, kernel property detection, initialization + * + * Copyright 2008-2012 Freescale Semiconductor, Inc. + */ + +#include <linux/device.h> +#include <linux/of_address.h> +#include <linux/of_irq.h> +#include <linux/sys_soc.h> + +#include "compat.h" +#include "regs.h" +#include "intern.h" +#include "jr.h" +#include "desc_constr.h" +#include "ctrl.h" + +bool caam_little_end; +EXPORT_SYMBOL(caam_little_end); +bool caam_dpaa2; +EXPORT_SYMBOL(caam_dpaa2); +bool caam_imx; +EXPORT_SYMBOL(caam_imx); + +#ifdef CONFIG_CAAM_QI +#include "qi.h" +#endif + +/* + * i.MX targets tend to have clock control subsystems that can + * enable/disable clocking to our device. + */ +static inline struct clk *caam_drv_identify_clk(struct device *dev, + char *clk_name) +{ + return caam_imx ? devm_clk_get(dev, clk_name) : NULL; +} + +/* + * Descriptor to instantiate RNG State Handle 0 in normal mode and + * load the JDKEK, TDKEK and TDSK registers + */ +static void build_instantiation_desc(u32 *desc, int handle, int do_sk) +{ + u32 *jump_cmd, op_flags; + + init_job_desc(desc, 0); + + op_flags = OP_TYPE_CLASS1_ALG | OP_ALG_ALGSEL_RNG | + (handle << OP_ALG_AAI_SHIFT) | OP_ALG_AS_INIT; + + /* INIT RNG in non-test mode */ + append_operation(desc, op_flags); + + if (!handle && do_sk) { + /* + * For SH0, Secure Keys must be generated as well + */ + + /* wait for done */ + jump_cmd = append_jump(desc, JUMP_CLASS_CLASS1); + set_jump_tgt_here(desc, jump_cmd); + + /* + * load 1 to clear written reg: + * resets the done interrrupt and returns the RNG to idle. + */ + append_load_imm_u32(desc, 1, LDST_SRCDST_WORD_CLRW); + + /* Initialize State Handle */ + append_operation(desc, OP_TYPE_CLASS1_ALG | OP_ALG_ALGSEL_RNG | + OP_ALG_AAI_RNG4_SK); + } + + append_jump(desc, JUMP_CLASS_CLASS1 | JUMP_TYPE_HALT); +} + +/* Descriptor for deinstantiation of State Handle 0 of the RNG block. */ +static void build_deinstantiation_desc(u32 *desc, int handle) +{ + init_job_desc(desc, 0); + + /* Uninstantiate State Handle 0 */ + append_operation(desc, OP_TYPE_CLASS1_ALG | OP_ALG_ALGSEL_RNG | + (handle << OP_ALG_AAI_SHIFT) | OP_ALG_AS_INITFINAL); + + append_jump(desc, JUMP_CLASS_CLASS1 | JUMP_TYPE_HALT); +} + +/* + * run_descriptor_deco0 - runs a descriptor on DECO0, under direct control of + * the software (no JR/QI used). + * @ctrldev - pointer to device + * @status - descriptor status, after being run + * + * Return: - 0 if no error occurred + * - -ENODEV if the DECO couldn't be acquired + * - -EAGAIN if an error occurred while executing the descriptor + */ +static inline int run_descriptor_deco0(struct device *ctrldev, u32 *desc, + u32 *status) +{ + struct caam_drv_private *ctrlpriv = dev_get_drvdata(ctrldev); + struct caam_ctrl __iomem *ctrl = ctrlpriv->ctrl; + struct caam_deco __iomem *deco = ctrlpriv->deco; + unsigned int timeout = 100000; + u32 deco_dbg_reg, flags; + int i; + + + if (ctrlpriv->virt_en == 1) { + clrsetbits_32(&ctrl->deco_rsr, 0, DECORSR_JR0); + + while (!(rd_reg32(&ctrl->deco_rsr) & DECORSR_VALID) && + --timeout) + cpu_relax(); + + timeout = 100000; + } + + clrsetbits_32(&ctrl->deco_rq, 0, DECORR_RQD0ENABLE); + + while (!(rd_reg32(&ctrl->deco_rq) & DECORR_DEN0) && + --timeout) + cpu_relax(); + + if (!timeout) { + dev_err(ctrldev, "failed to acquire DECO 0\n"); + clrsetbits_32(&ctrl->deco_rq, DECORR_RQD0ENABLE, 0); + return -ENODEV; + } + + for (i = 0; i < desc_len(desc); i++) + wr_reg32(&deco->descbuf[i], caam32_to_cpu(*(desc + i))); + + flags = DECO_JQCR_WHL; + /* + * If the descriptor length is longer than 4 words, then the + * FOUR bit in JRCTRL register must be set. + */ + if (desc_len(desc) >= 4) + flags |= DECO_JQCR_FOUR; + + /* Instruct the DECO to execute it */ + clrsetbits_32(&deco->jr_ctl_hi, 0, flags); + + timeout = 10000000; + do { + deco_dbg_reg = rd_reg32(&deco->desc_dbg); + /* + * If an error occured in the descriptor, then + * the DECO status field will be set to 0x0D + */ + if ((deco_dbg_reg & DESC_DBG_DECO_STAT_MASK) == + DESC_DBG_DECO_STAT_HOST_ERR) + break; + cpu_relax(); + } while ((deco_dbg_reg & DESC_DBG_DECO_STAT_VALID) && --timeout); + + *status = rd_reg32(&deco->op_status_hi) & + DECO_OP_STATUS_HI_ERR_MASK; + + if (ctrlpriv->virt_en == 1) + clrsetbits_32(&ctrl->deco_rsr, DECORSR_JR0, 0); + + /* Mark the DECO as free */ + clrsetbits_32(&ctrl->deco_rq, DECORR_RQD0ENABLE, 0); + + if (!timeout) + return -EAGAIN; + + return 0; +} + +/* + * instantiate_rng - builds and executes a descriptor on DECO0, + * which initializes the RNG block. + * @ctrldev - pointer to device + * @state_handle_mask - bitmask containing the instantiation status + * for the RNG4 state handles which exist in + * the RNG4 block: 1 if it's been instantiated + * by an external entry, 0 otherwise. + * @gen_sk - generate data to be loaded into the JDKEK, TDKEK and TDSK; + * Caution: this can be done only once; if the keys need to be + * regenerated, a POR is required + * + * Return: - 0 if no error occurred + * - -ENOMEM if there isn't enough memory to allocate the descriptor + * - -ENODEV if DECO0 couldn't be acquired + * - -EAGAIN if an error occurred when executing the descriptor + * f.i. there was a RNG hardware error due to not "good enough" + * entropy being aquired. + */ +static int instantiate_rng(struct device *ctrldev, int state_handle_mask, + int gen_sk) +{ + struct caam_drv_private *ctrlpriv = dev_get_drvdata(ctrldev); + struct caam_ctrl __iomem *ctrl; + u32 *desc, status = 0, rdsta_val; + int ret = 0, sh_idx; + + ctrl = (struct caam_ctrl __iomem *)ctrlpriv->ctrl; + desc = kmalloc(CAAM_CMD_SZ * 7, GFP_KERNEL); + if (!desc) + return -ENOMEM; + + for (sh_idx = 0; sh_idx < RNG4_MAX_HANDLES; sh_idx++) { + /* + * If the corresponding bit is set, this state handle + * was initialized by somebody else, so it's left alone. + */ + if ((1 << sh_idx) & state_handle_mask) + continue; + + /* Create the descriptor for instantiating RNG State Handle */ + build_instantiation_desc(desc, sh_idx, gen_sk); + + /* Try to run it through DECO0 */ + ret = run_descriptor_deco0(ctrldev, desc, &status); + + /* + * If ret is not 0, or descriptor status is not 0, then + * something went wrong. No need to try the next state + * handle (if available), bail out here. + * Also, if for some reason, the State Handle didn't get + * instantiated although the descriptor has finished + * without any error (HW optimizations for later + * CAAM eras), then try again. + */ + if (ret) + break; + + rdsta_val = rd_reg32(&ctrl->r4tst[0].rdsta) & RDSTA_IFMASK; + if ((status && status != JRSTA_SSRC_JUMP_HALT_CC) || + !(rdsta_val & (1 << sh_idx))) { + ret = -EAGAIN; + break; + } + + dev_info(ctrldev, "Instantiated RNG4 SH%d\n", sh_idx); + /* Clear the contents before recreating the descriptor */ + memset(desc, 0x00, CAAM_CMD_SZ * 7); + } + + kfree(desc); + + return ret; +} + +/* + * deinstantiate_rng - builds and executes a descriptor on DECO0, + * which deinitializes the RNG block. + * @ctrldev - pointer to device + * @state_handle_mask - bitmask containing the instantiation status + * for the RNG4 state handles which exist in + * the RNG4 block: 1 if it's been instantiated + * + * Return: - 0 if no error occurred + * - -ENOMEM if there isn't enough memory to allocate the descriptor + * - -ENODEV if DECO0 couldn't be acquired + * - -EAGAIN if an error occurred when executing the descriptor + */ +static int deinstantiate_rng(struct device *ctrldev, int state_handle_mask) +{ + u32 *desc, status; + int sh_idx, ret = 0; + + desc = kmalloc(CAAM_CMD_SZ * 3, GFP_KERNEL); + if (!desc) + return -ENOMEM; + + for (sh_idx = 0; sh_idx < RNG4_MAX_HANDLES; sh_idx++) { + /* + * If the corresponding bit is set, then it means the state + * handle was initialized by us, and thus it needs to be + * deinitialized as well + */ + if ((1 << sh_idx) & state_handle_mask) { + /* + * Create the descriptor for deinstantating this state + * handle + */ + build_deinstantiation_desc(desc, sh_idx); + + /* Try to run it through DECO0 */ + ret = run_descriptor_deco0(ctrldev, desc, &status); + + if (ret || + (status && status != JRSTA_SSRC_JUMP_HALT_CC)) { + dev_err(ctrldev, + "Failed to deinstantiate RNG4 SH%d\n", + sh_idx); + break; + } + dev_info(ctrldev, "Deinstantiated RNG4 SH%d\n", sh_idx); + } + } + + kfree(desc); + + return ret; +} + +static int caam_remove(struct platform_device *pdev) +{ + struct device *ctrldev; + struct caam_drv_private *ctrlpriv; + struct caam_ctrl __iomem *ctrl; + + ctrldev = &pdev->dev; + ctrlpriv = dev_get_drvdata(ctrldev); + ctrl = (struct caam_ctrl __iomem *)ctrlpriv->ctrl; + + /* Remove platform devices under the crypto node */ + of_platform_depopulate(ctrldev); + +#ifdef CONFIG_CAAM_QI + if (ctrlpriv->qidev) + caam_qi_shutdown(ctrlpriv->qidev); +#endif + + /* + * De-initialize RNG state handles initialized by this driver. + * In case of SoCs with Management Complex, RNG is managed by MC f/w. + */ + if (!ctrlpriv->mc_en && ctrlpriv->rng4_sh_init) + deinstantiate_rng(ctrldev, ctrlpriv->rng4_sh_init); + + /* Shut down debug views */ +#ifdef CONFIG_DEBUG_FS + debugfs_remove_recursive(ctrlpriv->dfs_root); +#endif + + /* Unmap controller region */ + iounmap(ctrl); + + /* shut clocks off before finalizing shutdown */ + clk_disable_unprepare(ctrlpriv->caam_ipg); + if (ctrlpriv->caam_mem) + clk_disable_unprepare(ctrlpriv->caam_mem); + clk_disable_unprepare(ctrlpriv->caam_aclk); + if (ctrlpriv->caam_emi_slow) + clk_disable_unprepare(ctrlpriv->caam_emi_slow); + return 0; +} + +/* + * kick_trng - sets the various parameters for enabling the initialization + * of the RNG4 block in CAAM + * @pdev - pointer to the platform device + * @ent_delay - Defines the length (in system clocks) of each entropy sample. + */ +static void kick_trng(struct platform_device *pdev, int ent_delay) +{ + struct device *ctrldev = &pdev->dev; + struct caam_drv_private *ctrlpriv = dev_get_drvdata(ctrldev); + struct caam_ctrl __iomem *ctrl; + struct rng4tst __iomem *r4tst; + u32 val; + + ctrl = (struct caam_ctrl __iomem *)ctrlpriv->ctrl; + r4tst = &ctrl->r4tst[0]; + + /* put RNG4 into program mode */ + clrsetbits_32(&r4tst->rtmctl, 0, RTMCTL_PRGM); + + /* + * Performance-wise, it does not make sense to + * set the delay to a value that is lower + * than the last one that worked (i.e. the state handles + * were instantiated properly. Thus, instead of wasting + * time trying to set the values controlling the sample + * frequency, the function simply returns. + */ + val = (rd_reg32(&r4tst->rtsdctl) & RTSDCTL_ENT_DLY_MASK) + >> RTSDCTL_ENT_DLY_SHIFT; + if (ent_delay <= val) + goto start_rng; + + val = rd_reg32(&r4tst->rtsdctl); + val = (val & ~RTSDCTL_ENT_DLY_MASK) | + (ent_delay << RTSDCTL_ENT_DLY_SHIFT); + wr_reg32(&r4tst->rtsdctl, val); + /* min. freq. count, equal to 1/4 of the entropy sample length */ + wr_reg32(&r4tst->rtfrqmin, ent_delay >> 2); + /* disable maximum frequency count */ + wr_reg32(&r4tst->rtfrqmax, RTFRQMAX_DISABLE); + /* read the control register */ + val = rd_reg32(&r4tst->rtmctl); +start_rng: + /* + * select raw sampling in both entropy shifter + * and statistical checker; ; put RNG4 into run mode + */ + clrsetbits_32(&r4tst->rtmctl, RTMCTL_PRGM, RTMCTL_SAMP_MODE_RAW_ES_SC); +} + +static int caam_get_era_from_hw(struct caam_ctrl __iomem *ctrl) +{ + static const struct { + u16 ip_id; + u8 maj_rev; + u8 era; + } id[] = { + {0x0A10, 1, 1}, + {0x0A10, 2, 2}, + {0x0A12, 1, 3}, + {0x0A14, 1, 3}, + {0x0A14, 2, 4}, + {0x0A16, 1, 4}, + {0x0A10, 3, 4}, + {0x0A11, 1, 4}, + {0x0A18, 1, 4}, + {0x0A11, 2, 5}, + {0x0A12, 2, 5}, + {0x0A13, 1, 5}, + {0x0A1C, 1, 5} + }; + u32 ccbvid, id_ms; + u8 maj_rev, era; + u16 ip_id; + int i; + + ccbvid = rd_reg32(&ctrl->perfmon.ccb_id); + era = (ccbvid & CCBVID_ERA_MASK) >> CCBVID_ERA_SHIFT; + if (era) /* This is '0' prior to CAAM ERA-6 */ + return era; + + id_ms = rd_reg32(&ctrl->perfmon.caam_id_ms); + ip_id = (id_ms & SECVID_MS_IPID_MASK) >> SECVID_MS_IPID_SHIFT; + maj_rev = (id_ms & SECVID_MS_MAJ_REV_MASK) >> SECVID_MS_MAJ_REV_SHIFT; + + for (i = 0; i < ARRAY_SIZE(id); i++) + if (id[i].ip_id == ip_id && id[i].maj_rev == maj_rev) + return id[i].era; + + return -ENOTSUPP; +} + +/** + * caam_get_era() - Return the ERA of the SEC on SoC, based + * on "sec-era" optional property in the DTS. This property is updated + * by u-boot. + * In case this property is not passed an attempt to retrieve the CAAM + * era via register reads will be made. + **/ +static int caam_get_era(struct caam_ctrl __iomem *ctrl) +{ + struct device_node *caam_node; + int ret; + u32 prop; + + caam_node = of_find_compatible_node(NULL, NULL, "fsl,sec-v4.0"); + ret = of_property_read_u32(caam_node, "fsl,sec-era", &prop); + of_node_put(caam_node); + + if (!ret) + return prop; + else + return caam_get_era_from_hw(ctrl); +} + +static const struct of_device_id caam_match[] = { + { + .compatible = "fsl,sec-v4.0", + }, + { + .compatible = "fsl,sec4.0", + }, + {}, +}; +MODULE_DEVICE_TABLE(of, caam_match); + +/* Probe routine for CAAM top (controller) level */ +static int caam_probe(struct platform_device *pdev) +{ + int ret, ring, gen_sk, ent_delay = RTSDCTL_ENT_DLY_MIN; + u64 caam_id; + static const struct soc_device_attribute imx_soc[] = { + {.family = "Freescale i.MX"}, + {}, + }; + struct device *dev; + struct device_node *nprop, *np; + struct caam_ctrl __iomem *ctrl; + struct caam_drv_private *ctrlpriv; + struct clk *clk; +#ifdef CONFIG_DEBUG_FS + struct caam_perfmon *perfmon; +#endif + u32 scfgr, comp_params; + u32 cha_vid_ls; + int pg_size; + int BLOCK_OFFSET = 0; + + ctrlpriv = devm_kzalloc(&pdev->dev, sizeof(*ctrlpriv), GFP_KERNEL); + if (!ctrlpriv) + return -ENOMEM; + + dev = &pdev->dev; + dev_set_drvdata(dev, ctrlpriv); + nprop = pdev->dev.of_node; + + caam_imx = (bool)soc_device_match(imx_soc); + + /* Enable clocking */ + clk = caam_drv_identify_clk(&pdev->dev, "ipg"); + if (IS_ERR(clk)) { + ret = PTR_ERR(clk); + dev_err(&pdev->dev, + "can't identify CAAM ipg clk: %d\n", ret); + return ret; + } + ctrlpriv->caam_ipg = clk; + + if (!of_machine_is_compatible("fsl,imx7d") && + !of_machine_is_compatible("fsl,imx7s")) { + clk = caam_drv_identify_clk(&pdev->dev, "mem"); + if (IS_ERR(clk)) { + ret = PTR_ERR(clk); + dev_err(&pdev->dev, + "can't identify CAAM mem clk: %d\n", ret); + return ret; + } + ctrlpriv->caam_mem = clk; + } + + clk = caam_drv_identify_clk(&pdev->dev, "aclk"); + if (IS_ERR(clk)) { + ret = PTR_ERR(clk); + dev_err(&pdev->dev, + "can't identify CAAM aclk clk: %d\n", ret); + return ret; + } + ctrlpriv->caam_aclk = clk; + + if (!of_machine_is_compatible("fsl,imx6ul") && + !of_machine_is_compatible("fsl,imx7d") && + !of_machine_is_compatible("fsl,imx7s")) { + clk = caam_drv_identify_clk(&pdev->dev, "emi_slow"); + if (IS_ERR(clk)) { + ret = PTR_ERR(clk); + dev_err(&pdev->dev, + "can't identify CAAM emi_slow clk: %d\n", ret); + return ret; + } + ctrlpriv->caam_emi_slow = clk; + } + + ret = clk_prepare_enable(ctrlpriv->caam_ipg); + if (ret < 0) { + dev_err(&pdev->dev, "can't enable CAAM ipg clock: %d\n", ret); + return ret; + } + + if (ctrlpriv->caam_mem) { + ret = clk_prepare_enable(ctrlpriv->caam_mem); + if (ret < 0) { + dev_err(&pdev->dev, "can't enable CAAM secure mem clock: %d\n", + ret); + goto disable_caam_ipg; + } + } + + ret = clk_prepare_enable(ctrlpriv->caam_aclk); + if (ret < 0) { + dev_err(&pdev->dev, "can't enable CAAM aclk clock: %d\n", ret); + goto disable_caam_mem; + } + + if (ctrlpriv->caam_emi_slow) { + ret = clk_prepare_enable(ctrlpriv->caam_emi_slow); + if (ret < 0) { + dev_err(&pdev->dev, "can't enable CAAM emi slow clock: %d\n", + ret); + goto disable_caam_aclk; + } + } + + /* Get configuration properties from device tree */ + /* First, get register page */ + ctrl = of_iomap(nprop, 0); + if (ctrl == NULL) { + dev_err(dev, "caam: of_iomap() failed\n"); + ret = -ENOMEM; + goto disable_caam_emi_slow; + } + + caam_little_end = !(bool)(rd_reg32(&ctrl->perfmon.status) & + (CSTA_PLEND | CSTA_ALT_PLEND)); + + /* Finding the page size for using the CTPR_MS register */ + comp_params = rd_reg32(&ctrl->perfmon.comp_parms_ms); + pg_size = (comp_params & CTPR_MS_PG_SZ_MASK) >> CTPR_MS_PG_SZ_SHIFT; + + /* Allocating the BLOCK_OFFSET based on the supported page size on + * the platform + */ + if (pg_size == 0) + BLOCK_OFFSET = PG_SIZE_4K; + else + BLOCK_OFFSET = PG_SIZE_64K; + + ctrlpriv->ctrl = (struct caam_ctrl __iomem __force *)ctrl; + ctrlpriv->assure = (struct caam_assurance __iomem __force *) + ((__force uint8_t *)ctrl + + BLOCK_OFFSET * ASSURE_BLOCK_NUMBER + ); + ctrlpriv->deco = (struct caam_deco __iomem __force *) + ((__force uint8_t *)ctrl + + BLOCK_OFFSET * DECO_BLOCK_NUMBER + ); + + /* Get the IRQ of the controller (for security violations only) */ + ctrlpriv->secvio_irq = irq_of_parse_and_map(nprop, 0); + + /* + * Enable DECO watchdogs and, if this is a PHYS_ADDR_T_64BIT kernel, + * long pointers in master configuration register. + * In case of SoCs with Management Complex, MC f/w performs + * the configuration. + */ + caam_dpaa2 = !!(comp_params & CTPR_MS_DPAA2); + np = of_find_compatible_node(NULL, NULL, "fsl,qoriq-mc"); + ctrlpriv->mc_en = !!np; + of_node_put(np); + + if (!ctrlpriv->mc_en) + clrsetbits_32(&ctrl->mcr, MCFGR_AWCACHE_MASK | MCFGR_LONG_PTR, + MCFGR_AWCACHE_CACH | MCFGR_AWCACHE_BUFF | + MCFGR_WDENABLE | MCFGR_LARGE_BURST | + (sizeof(dma_addr_t) == sizeof(u64) ? + MCFGR_LONG_PTR : 0)); + + /* + * Read the Compile Time paramters and SCFGR to determine + * if Virtualization is enabled for this platform + */ + scfgr = rd_reg32(&ctrl->scfgr); + + ctrlpriv->virt_en = 0; + if (comp_params & CTPR_MS_VIRT_EN_INCL) { + /* VIRT_EN_INCL = 1 & VIRT_EN_POR = 1 or + * VIRT_EN_INCL = 1 & VIRT_EN_POR = 0 & SCFGR_VIRT_EN = 1 + */ + if ((comp_params & CTPR_MS_VIRT_EN_POR) || + (!(comp_params & CTPR_MS_VIRT_EN_POR) && + (scfgr & SCFGR_VIRT_EN))) + ctrlpriv->virt_en = 1; + } else { + /* VIRT_EN_INCL = 0 && VIRT_EN_POR_VALUE = 1 */ + if (comp_params & CTPR_MS_VIRT_EN_POR) + ctrlpriv->virt_en = 1; + } + + if (ctrlpriv->virt_en == 1) + clrsetbits_32(&ctrl->jrstart, 0, JRSTART_JR0_START | + JRSTART_JR1_START | JRSTART_JR2_START | + JRSTART_JR3_START); + + if (sizeof(dma_addr_t) == sizeof(u64)) { + if (caam_dpaa2) + ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(49)); + else if (of_device_is_compatible(nprop, "fsl,sec-v5.0")) + ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(40)); + else + ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(36)); + } else { + ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32)); + } + if (ret) { + dev_err(dev, "dma_set_mask_and_coherent failed (%d)\n", ret); + goto iounmap_ctrl; + } + + ctrlpriv->era = caam_get_era(ctrl); + + ret = of_platform_populate(nprop, caam_match, NULL, dev); + if (ret) { + dev_err(dev, "JR platform devices creation error\n"); + goto iounmap_ctrl; + } + +#ifdef CONFIG_DEBUG_FS + /* + * FIXME: needs better naming distinction, as some amalgamation of + * "caam" and nprop->full_name. The OF name isn't distinctive, + * but does separate instances + */ + perfmon = (struct caam_perfmon __force *)&ctrl->perfmon; + + ctrlpriv->dfs_root = debugfs_create_dir(dev_name(dev), NULL); + ctrlpriv->ctl = debugfs_create_dir("ctl", ctrlpriv->dfs_root); +#endif + + ring = 0; + for_each_available_child_of_node(nprop, np) + if (of_device_is_compatible(np, "fsl,sec-v4.0-job-ring") || + of_device_is_compatible(np, "fsl,sec4.0-job-ring")) { + ctrlpriv->jr[ring] = (struct caam_job_ring __iomem __force *) + ((__force uint8_t *)ctrl + + (ring + JR_BLOCK_NUMBER) * + BLOCK_OFFSET + ); + ctrlpriv->total_jobrs++; + ring++; + } + + /* Check to see if (DPAA 1.x) QI present. If so, enable */ + ctrlpriv->qi_present = !!(comp_params & CTPR_MS_QI_MASK); + if (ctrlpriv->qi_present && !caam_dpaa2) { + ctrlpriv->qi = (struct caam_queue_if __iomem __force *) + ((__force uint8_t *)ctrl + + BLOCK_OFFSET * QI_BLOCK_NUMBER + ); + /* This is all that's required to physically enable QI */ + wr_reg32(&ctrlpriv->qi->qi_control_lo, QICTL_DQEN); + + /* If QMAN driver is present, init CAAM-QI backend */ +#ifdef CONFIG_CAAM_QI + ret = caam_qi_init(pdev); + if (ret) + dev_err(dev, "caam qi i/f init failed: %d\n", ret); +#endif + } + + /* If no QI and no rings specified, quit and go home */ + if ((!ctrlpriv->qi_present) && (!ctrlpriv->total_jobrs)) { + dev_err(dev, "no queues configured, terminating\n"); + ret = -ENOMEM; + goto caam_remove; + } + + cha_vid_ls = rd_reg32(&ctrl->perfmon.cha_id_ls); + + /* + * If SEC has RNG version >= 4 and RNG state handle has not been + * already instantiated, do RNG instantiation + * In case of SoCs with Management Complex, RNG is managed by MC f/w. + */ + if (!ctrlpriv->mc_en && + (cha_vid_ls & CHA_ID_LS_RNG_MASK) >> CHA_ID_LS_RNG_SHIFT >= 4) { + ctrlpriv->rng4_sh_init = + rd_reg32(&ctrl->r4tst[0].rdsta); + /* + * If the secure keys (TDKEK, JDKEK, TDSK), were already + * generated, signal this to the function that is instantiating + * the state handles. An error would occur if RNG4 attempts + * to regenerate these keys before the next POR. + */ + gen_sk = ctrlpriv->rng4_sh_init & RDSTA_SKVN ? 0 : 1; + ctrlpriv->rng4_sh_init &= RDSTA_IFMASK; + do { + int inst_handles = + rd_reg32(&ctrl->r4tst[0].rdsta) & + RDSTA_IFMASK; + /* + * If either SH were instantiated by somebody else + * (e.g. u-boot) then it is assumed that the entropy + * parameters are properly set and thus the function + * setting these (kick_trng(...)) is skipped. + * Also, if a handle was instantiated, do not change + * the TRNG parameters. + */ + if (!(ctrlpriv->rng4_sh_init || inst_handles)) { + dev_info(dev, + "Entropy delay = %u\n", + ent_delay); + kick_trng(pdev, ent_delay); + ent_delay += 400; + } + /* + * if instantiate_rng(...) fails, the loop will rerun + * and the kick_trng(...) function will modfiy the + * upper and lower limits of the entropy sampling + * interval, leading to a sucessful initialization of + * the RNG. + */ + ret = instantiate_rng(dev, inst_handles, + gen_sk); + if (ret == -EAGAIN) + /* + * if here, the loop will rerun, + * so don't hog the CPU + */ + cpu_relax(); + } while ((ret == -EAGAIN) && (ent_delay < RTSDCTL_ENT_DLY_MAX)); + if (ret) { + dev_err(dev, "failed to instantiate RNG"); + goto caam_remove; + } + /* + * Set handles init'ed by this module as the complement of the + * already initialized ones + */ + ctrlpriv->rng4_sh_init = ~ctrlpriv->rng4_sh_init & RDSTA_IFMASK; + + /* Enable RDB bit so that RNG works faster */ + clrsetbits_32(&ctrl->scfgr, 0, SCFGR_RDBENABLE); + } + + /* NOTE: RTIC detection ought to go here, around Si time */ + + caam_id = (u64)rd_reg32(&ctrl->perfmon.caam_id_ms) << 32 | + (u64)rd_reg32(&ctrl->perfmon.caam_id_ls); + + /* Report "alive" for developer to see */ + dev_info(dev, "device ID = 0x%016llx (Era %d)\n", caam_id, + ctrlpriv->era); + dev_info(dev, "job rings = %d, qi = %d\n", + ctrlpriv->total_jobrs, ctrlpriv->qi_present); + +#ifdef CONFIG_DEBUG_FS + debugfs_create_file("rq_dequeued", S_IRUSR | S_IRGRP | S_IROTH, + ctrlpriv->ctl, &perfmon->req_dequeued, + &caam_fops_u64_ro); + debugfs_create_file("ob_rq_encrypted", S_IRUSR | S_IRGRP | S_IROTH, + ctrlpriv->ctl, &perfmon->ob_enc_req, + &caam_fops_u64_ro); + debugfs_create_file("ib_rq_decrypted", S_IRUSR | S_IRGRP | S_IROTH, + ctrlpriv->ctl, &perfmon->ib_dec_req, + &caam_fops_u64_ro); + debugfs_create_file("ob_bytes_encrypted", S_IRUSR | S_IRGRP | S_IROTH, + ctrlpriv->ctl, &perfmon->ob_enc_bytes, + &caam_fops_u64_ro); + debugfs_create_file("ob_bytes_protected", S_IRUSR | S_IRGRP | S_IROTH, + ctrlpriv->ctl, &perfmon->ob_prot_bytes, + &caam_fops_u64_ro); + debugfs_create_file("ib_bytes_decrypted", S_IRUSR | S_IRGRP | S_IROTH, + ctrlpriv->ctl, &perfmon->ib_dec_bytes, + &caam_fops_u64_ro); + debugfs_create_file("ib_bytes_validated", S_IRUSR | S_IRGRP | S_IROTH, + ctrlpriv->ctl, &perfmon->ib_valid_bytes, + &caam_fops_u64_ro); + + /* Controller level - global status values */ + debugfs_create_file("fault_addr", S_IRUSR | S_IRGRP | S_IROTH, + ctrlpriv->ctl, &perfmon->faultaddr, + &caam_fops_u32_ro); + debugfs_create_file("fault_detail", S_IRUSR | S_IRGRP | S_IROTH, + ctrlpriv->ctl, &perfmon->faultdetail, + &caam_fops_u32_ro); + debugfs_create_file("fault_status", S_IRUSR | S_IRGRP | S_IROTH, + ctrlpriv->ctl, &perfmon->status, + &caam_fops_u32_ro); + + /* Internal covering keys (useful in non-secure mode only) */ + ctrlpriv->ctl_kek_wrap.data = (__force void *)&ctrlpriv->ctrl->kek[0]; + ctrlpriv->ctl_kek_wrap.size = KEK_KEY_SIZE * sizeof(u32); + ctrlpriv->ctl_kek = debugfs_create_blob("kek", + S_IRUSR | + S_IRGRP | S_IROTH, + ctrlpriv->ctl, + &ctrlpriv->ctl_kek_wrap); + + ctrlpriv->ctl_tkek_wrap.data = (__force void *)&ctrlpriv->ctrl->tkek[0]; + ctrlpriv->ctl_tkek_wrap.size = KEK_KEY_SIZE * sizeof(u32); + ctrlpriv->ctl_tkek = debugfs_create_blob("tkek", + S_IRUSR | + S_IRGRP | S_IROTH, + ctrlpriv->ctl, + &ctrlpriv->ctl_tkek_wrap); + + ctrlpriv->ctl_tdsk_wrap.data = (__force void *)&ctrlpriv->ctrl->tdsk[0]; + ctrlpriv->ctl_tdsk_wrap.size = KEK_KEY_SIZE * sizeof(u32); + ctrlpriv->ctl_tdsk = debugfs_create_blob("tdsk", + S_IRUSR | + S_IRGRP | S_IROTH, + ctrlpriv->ctl, + &ctrlpriv->ctl_tdsk_wrap); +#endif + return 0; + +caam_remove: + caam_remove(pdev); + return ret; + +iounmap_ctrl: + iounmap(ctrl); +disable_caam_emi_slow: + if (ctrlpriv->caam_emi_slow) + clk_disable_unprepare(ctrlpriv->caam_emi_slow); +disable_caam_aclk: + clk_disable_unprepare(ctrlpriv->caam_aclk); +disable_caam_mem: + if (ctrlpriv->caam_mem) + clk_disable_unprepare(ctrlpriv->caam_mem); +disable_caam_ipg: + clk_disable_unprepare(ctrlpriv->caam_ipg); + return ret; +} + +static struct platform_driver caam_driver = { + .driver = { + .name = "caam", + .of_match_table = caam_match, + }, + .probe = caam_probe, + .remove = caam_remove, +}; + +module_platform_driver(caam_driver); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("FSL CAAM request backend"); +MODULE_AUTHOR("Freescale Semiconductor - NMG/STC"); |