diff options
Diffstat (limited to 'drivers/crypto/caam/ctrl.c')
-rw-r--r-- | drivers/crypto/caam/ctrl.c | 356 |
1 files changed, 165 insertions, 191 deletions
diff --git a/drivers/crypto/caam/ctrl.c b/drivers/crypto/caam/ctrl.c index 98468b9..8f9642c 100644 --- a/drivers/crypto/caam/ctrl.c +++ b/drivers/crypto/caam/ctrl.c @@ -2,40 +2,41 @@ * Controller-level driver, kernel property detection, initialization * * Copyright 2008-2012 Freescale Semiconductor, Inc. + * Copyright 2017 NXP */ #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 "error.h" #include "ctrl.h" bool caam_little_end; EXPORT_SYMBOL(caam_little_end); +bool caam_imx; +EXPORT_SYMBOL(caam_imx); +bool caam_dpaa2; +EXPORT_SYMBOL(caam_dpaa2); + +#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. */ -#ifdef CONFIG_CRYPTO_DEV_FSL_CAAM_IMX -static inline struct clk *caam_drv_identify_clk(struct device *dev, - char *clk_name) -{ - return devm_clk_get(dev, clk_name); -} -#else static inline struct clk *caam_drv_identify_clk(struct device *dev, char *clk_name) { - return NULL; + return caam_imx ? devm_clk_get(dev, clk_name) : NULL; } -#endif /* * Descriptor to instantiate RNG State Handle 0 in normal mode and @@ -270,7 +271,7 @@ static int deinstantiate_rng(struct device *ctrldev, int state_handle_mask) /* * If the corresponding bit is set, then it means the state * handle was initialized by us, and thus it needs to be - * deintialized as well + * deinitialized as well */ if ((1 << sh_idx) & state_handle_mask) { /* @@ -303,20 +304,24 @@ static int caam_remove(struct platform_device *pdev) struct device *ctrldev; struct caam_drv_private *ctrlpriv; struct caam_ctrl __iomem *ctrl; - int ring; ctrldev = &pdev->dev; ctrlpriv = dev_get_drvdata(ctrldev); ctrl = (struct caam_ctrl __iomem *)ctrlpriv->ctrl; - /* Remove platform devices for JobRs */ - for (ring = 0; ring < ctrlpriv->total_jobrs; ring++) { - if (ctrlpriv->jrpdev[ring]) - of_device_unregister(ctrlpriv->jrpdev[ring]); - } + /* 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. */ - if (ctrlpriv->rng4_sh_init) + /* + * De-initialize RNG state handles initialized by this driver. + * In case of DPAA 2.x, RNG is managed by MC firmware. + */ + if (!caam_dpaa2 && ctrlpriv->rng4_sh_init) deinstantiate_rng(ctrldev, ctrlpriv->rng4_sh_init); /* Shut down debug views */ @@ -331,8 +336,8 @@ static int caam_remove(struct platform_device *pdev) clk_disable_unprepare(ctrlpriv->caam_ipg); clk_disable_unprepare(ctrlpriv->caam_mem); clk_disable_unprepare(ctrlpriv->caam_aclk); - clk_disable_unprepare(ctrlpriv->caam_emi_slow); - + if (ctrlpriv->caam_emi_slow) + clk_disable_unprepare(ctrlpriv->caam_emi_slow); return 0; } @@ -366,11 +371,8 @@ static void kick_trng(struct platform_device *pdev, int ent_delay) */ val = (rd_reg32(&r4tst->rtsdctl) & RTSDCTL_ENT_DLY_MASK) >> RTSDCTL_ENT_DLY_SHIFT; - if (ent_delay <= val) { - /* put RNG4 into run mode */ - clrsetbits_32(&r4tst->rtmctl, RTMCTL_PRGM, 0); - return; - } + if (ent_delay <= val) + goto start_rng; val = rd_reg32(&r4tst->rtsdctl); val = (val & ~RTSDCTL_ENT_DLY_MASK) | @@ -382,15 +384,12 @@ static void kick_trng(struct platform_device *pdev, int ent_delay) 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 + * and statistical checker; ; put RNG4 into run mode */ - clrsetbits_32(&val, 0, RTMCTL_SAMP_MODE_RAW_ES_SC); - /* put RNG4 into run mode */ - clrsetbits_32(&val, RTMCTL_PRGM, 0); - /* write back the control register */ - wr_reg32(&r4tst->rtmctl, val); + clrsetbits_32(&r4tst->rtmctl, RTMCTL_PRGM, RTMCTL_SAMP_MODE_RAW_ES_SC); } /** @@ -411,28 +410,26 @@ int caam_get_era(void) } EXPORT_SYMBOL(caam_get_era); -#ifdef CONFIG_DEBUG_FS -static int caam_debugfs_u64_get(void *data, u64 *val) -{ - *val = caam64_to_cpu(*(u64 *)data); - return 0; -} - -static int caam_debugfs_u32_get(void *data, u64 *val) -{ - *val = caam32_to_cpu(*(u32 *)data); - return 0; -} - -DEFINE_SIMPLE_ATTRIBUTE(caam_fops_u32_ro, caam_debugfs_u32_get, NULL, "%llu\n"); -DEFINE_SIMPLE_ATTRIBUTE(caam_fops_u64_ro, caam_debugfs_u64_get, NULL, "%llu\n"); -#endif +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, rspec, gen_sk, ent_delay = RTSDCTL_ENT_DLY_MIN; + 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; @@ -452,9 +449,10 @@ static int caam_probe(struct platform_device *pdev) dev = &pdev->dev; dev_set_drvdata(dev, ctrlpriv); - ctrlpriv->pdev = pdev; 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)) { @@ -483,14 +481,16 @@ static int caam_probe(struct platform_device *pdev) } ctrlpriv->caam_aclk = clk; - 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; + if (!of_machine_is_compatible("fsl,imx6ul")) { + 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; } - ctrlpriv->caam_emi_slow = clk; ret = clk_prepare_enable(ctrlpriv->caam_ipg); if (ret < 0) { @@ -511,11 +511,13 @@ static int caam_probe(struct platform_device *pdev) goto disable_caam_mem; } - 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; + 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 */ @@ -542,13 +544,13 @@ static int caam_probe(struct platform_device *pdev) else BLOCK_OFFSET = PG_SIZE_64K; - ctrlpriv->ctrl = (struct caam_ctrl __force *)ctrl; - ctrlpriv->assure = (struct caam_assurance __force *) - ((uint8_t *)ctrl + + 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 __force *) - ((uint8_t *)ctrl + + ctrlpriv->deco = (struct caam_deco __iomem __force *) + ((__force uint8_t *)ctrl + BLOCK_OFFSET * DECO_BLOCK_NUMBER ); @@ -557,12 +559,17 @@ static int caam_probe(struct platform_device *pdev) /* * Enable DECO watchdogs and, if this is a PHYS_ADDR_T_64BIT kernel, - * long pointers in master configuration register + * long pointers in master configuration register. + * In case of DPAA 2.x, Management Complex firmware performs + * the configuration. */ - 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)); + caam_dpaa2 = !!(comp_params & CTPR_MS_DPAA2); + if (!caam_dpaa2) + 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 @@ -590,64 +597,67 @@ static int caam_probe(struct platform_device *pdev) JRSTART_JR1_START | JRSTART_JR2_START | JRSTART_JR3_START); - if (sizeof(dma_addr_t) == sizeof(u64)) - if (of_device_is_compatible(nprop, "fsl,sec-v5.0")) - dma_set_mask_and_coherent(dev, DMA_BIT_MASK(40)); + 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 - dma_set_mask_and_coherent(dev, DMA_BIT_MASK(36)); - else - dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32)); - - /* - * Detect and enable JobRs - * First, find out how many ring spec'ed, allocate references - * for all, then go probe each one. - */ - rspec = 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")) - rspec++; + 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->jrpdev = devm_kcalloc(&pdev->dev, rspec, - sizeof(*ctrlpriv->jrpdev), GFP_KERNEL); - if (ctrlpriv->jrpdev == NULL) { - ret = -ENOMEM; + 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; - ctrlpriv->total_jobrs = 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->jrpdev[ring] = - of_platform_device_create(np, NULL, dev); - if (!ctrlpriv->jrpdev[ring]) { - pr_warn("JR%d Platform device creation error\n", - ring); - continue; - } - ctrlpriv->jr[ring] = (struct caam_job_ring __force *) - ((uint8_t *)ctrl + + 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 QI present. If so, enable */ - ctrlpriv->qi_present = - !!(rd_reg32(&ctrl->perfmon.comp_parms_ms) & - CTPR_MS_QI_MASK); - if (ctrlpriv->qi_present) { - ctrlpriv->qi = (struct caam_queue_if __force *) - ((uint8_t *)ctrl + + /* 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 */ @@ -662,8 +672,10 @@ static int caam_probe(struct platform_device *pdev) /* * If SEC has RNG version >= 4 and RNG state handle has not been * already instantiated, do RNG instantiation + * In case of DPAA 2.x, RNG is managed by MC firmware. */ - if ((cha_vid_ls & CHA_ID_LS_RNG_MASK) >> CHA_ID_LS_RNG_SHIFT >= 4) { + if (!caam_dpaa2 && + (cha_vid_ls & CHA_ID_LS_RNG_MASK) >> CHA_ID_LS_RNG_SHIFT >= 4) { ctrlpriv->rng4_sh_init = rd_reg32(&ctrl->r4tst[0].rdsta); /* @@ -731,77 +743,46 @@ static int caam_probe(struct platform_device *pdev) /* Report "alive" for developer to see */ dev_info(dev, "device ID = 0x%016llx (Era %d)\n", caam_id, caam_get_era()); - dev_info(dev, "job rings = %d, qi = %d\n", - ctrlpriv->total_jobrs, ctrlpriv->qi_present); + dev_info(dev, "job rings = %d, qi = %d, dpaa2 = %s\n", + ctrlpriv->total_jobrs, ctrlpriv->qi_present, + caam_dpaa2 ? "yes" : "no"); #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); - - /* Controller-level - performance monitor counters */ - - ctrlpriv->ctl_rq_dequeued = - debugfs_create_file("rq_dequeued", - S_IRUSR | S_IRGRP | S_IROTH, - ctrlpriv->ctl, &perfmon->req_dequeued, - &caam_fops_u64_ro); - ctrlpriv->ctl_ob_enc_req = - debugfs_create_file("ob_rq_encrypted", - S_IRUSR | S_IRGRP | S_IROTH, - ctrlpriv->ctl, &perfmon->ob_enc_req, - &caam_fops_u64_ro); - ctrlpriv->ctl_ib_dec_req = - debugfs_create_file("ib_rq_decrypted", - S_IRUSR | S_IRGRP | S_IROTH, - ctrlpriv->ctl, &perfmon->ib_dec_req, - &caam_fops_u64_ro); - ctrlpriv->ctl_ob_enc_bytes = - debugfs_create_file("ob_bytes_encrypted", - S_IRUSR | S_IRGRP | S_IROTH, - ctrlpriv->ctl, &perfmon->ob_enc_bytes, - &caam_fops_u64_ro); - ctrlpriv->ctl_ob_prot_bytes = - debugfs_create_file("ob_bytes_protected", - S_IRUSR | S_IRGRP | S_IROTH, - ctrlpriv->ctl, &perfmon->ob_prot_bytes, - &caam_fops_u64_ro); - ctrlpriv->ctl_ib_dec_bytes = - debugfs_create_file("ib_bytes_decrypted", - S_IRUSR | S_IRGRP | S_IROTH, - ctrlpriv->ctl, &perfmon->ib_dec_bytes, - &caam_fops_u64_ro); - ctrlpriv->ctl_ib_valid_bytes = - debugfs_create_file("ib_bytes_validated", - S_IRUSR | S_IRGRP | S_IROTH, - ctrlpriv->ctl, &perfmon->ib_valid_bytes, - &caam_fops_u64_ro); + 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 */ - ctrlpriv->ctl_faultaddr = - debugfs_create_file("fault_addr", - S_IRUSR | S_IRGRP | S_IROTH, - ctrlpriv->ctl, &perfmon->faultaddr, - &caam_fops_u32_ro); - ctrlpriv->ctl_faultdetail = - debugfs_create_file("fault_detail", - S_IRUSR | S_IRGRP | S_IROTH, - ctrlpriv->ctl, &perfmon->faultdetail, - &caam_fops_u32_ro); - ctrlpriv->ctl_faultstatus = - debugfs_create_file("fault_status", - S_IRUSR | S_IRGRP | S_IROTH, - ctrlpriv->ctl, &perfmon->status, - &caam_fops_u32_ro); + 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 = &ctrlpriv->ctrl->kek[0]; + 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 | @@ -809,7 +790,7 @@ static int caam_probe(struct platform_device *pdev) ctrlpriv->ctl, &ctrlpriv->ctl_kek_wrap); - ctrlpriv->ctl_tkek_wrap.data = &ctrlpriv->ctrl->tkek[0]; + 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 | @@ -817,7 +798,7 @@ static int caam_probe(struct platform_device *pdev) ctrlpriv->ctl, &ctrlpriv->ctl_tkek_wrap); - ctrlpriv->ctl_tdsk_wrap.data = &ctrlpriv->ctrl->tdsk[0]; + 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 | @@ -828,13 +809,17 @@ static int caam_probe(struct platform_device *pdev) return 0; caam_remove: +#ifdef CONFIG_DEBUG_FS + debugfs_remove_recursive(ctrlpriv->dfs_root); +#endif caam_remove(pdev); return ret; iounmap_ctrl: iounmap(ctrl); disable_caam_emi_slow: - clk_disable_unprepare(ctrlpriv->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: @@ -844,17 +829,6 @@ disable_caam_ipg: return ret; } -static struct of_device_id caam_match[] = { - { - .compatible = "fsl,sec-v4.0", - }, - { - .compatible = "fsl,sec4.0", - }, - {}, -}; -MODULE_DEVICE_TABLE(of, caam_match); - static struct platform_driver caam_driver = { .driver = { .name = "caam", |