| /* |
| * CAAM control-plane driver backend |
| * Controller-level driver, kernel property detection, initialization |
| * |
| * Copyright 2008-2011 Freescale Semiconductor, Inc. |
| */ |
| |
| #include "compat.h" |
| #include "regs.h" |
| #include "intern.h" |
| #include "jr.h" |
| |
| static int caam_remove(struct platform_device *pdev) |
| { |
| struct device *ctrldev; |
| struct caam_drv_private *ctrlpriv; |
| struct caam_drv_private_jr *jrpriv; |
| struct caam_full __iomem *topregs; |
| int ring, ret = 0; |
| |
| ctrldev = &pdev->dev; |
| ctrlpriv = dev_get_drvdata(ctrldev); |
| topregs = (struct caam_full __iomem *)ctrlpriv->ctrl; |
| |
| /* shut down JobRs */ |
| for (ring = 0; ring < ctrlpriv->total_jobrs; ring++) { |
| ret |= caam_jr_shutdown(ctrlpriv->jrdev[ring]); |
| jrpriv = dev_get_drvdata(ctrlpriv->jrdev[ring]); |
| irq_dispose_mapping(jrpriv->irq); |
| } |
| |
| /* Shut down debug views */ |
| #ifdef CONFIG_DEBUG_FS |
| debugfs_remove_recursive(ctrlpriv->dfs_root); |
| #endif |
| |
| /* Unmap controller region */ |
| iounmap(&topregs->ctrl); |
| |
| kfree(ctrlpriv->jrdev); |
| kfree(ctrlpriv); |
| |
| return ret; |
| } |
| |
| /* Probe routine for CAAM top (controller) level */ |
| static int caam_probe(struct platform_device *pdev) |
| { |
| int d, ring, rspec; |
| struct device *dev; |
| struct device_node *nprop, *np; |
| struct caam_ctrl __iomem *ctrl; |
| struct caam_full __iomem *topregs; |
| struct caam_drv_private *ctrlpriv; |
| struct caam_perfmon *perfmon; |
| struct caam_deco **deco; |
| u32 deconum; |
| |
| ctrlpriv = kzalloc(sizeof(struct caam_drv_private), GFP_KERNEL); |
| if (!ctrlpriv) |
| return -ENOMEM; |
| |
| dev = &pdev->dev; |
| dev_set_drvdata(dev, ctrlpriv); |
| ctrlpriv->pdev = pdev; |
| nprop = pdev->dev.of_node; |
| |
| /* 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"); |
| return -ENOMEM; |
| } |
| ctrlpriv->ctrl = (struct caam_ctrl __force *)ctrl; |
| |
| /* topregs used to derive pointers to CAAM sub-blocks only */ |
| topregs = (struct caam_full __iomem *)ctrl; |
| |
| /* Get the IRQ of the controller (for security violations only) */ |
| ctrlpriv->secvio_irq = of_irq_to_resource(nprop, 0, NULL); |
| |
| /* |
| * Enable DECO watchdogs and, if this is a PHYS_ADDR_T_64BIT kernel, |
| * 36-bit pointers in master configuration register |
| */ |
| setbits32(&topregs->ctrl.mcr, MCFGR_WDENABLE | |
| (sizeof(dma_addr_t) == sizeof(u64) ? MCFGR_LONG_PTR : 0)); |
| |
| if (sizeof(dma_addr_t) == sizeof(u64)) |
| dma_set_mask(dev, DMA_BIT_MASK(36)); |
| |
| /* Find out how many DECOs are present */ |
| deconum = (rd_reg64(&topregs->ctrl.perfmon.cha_num) & |
| CHA_NUM_DECONUM_MASK) >> CHA_NUM_DECONUM_SHIFT; |
| |
| ctrlpriv->deco = kmalloc(deconum * sizeof(struct caam_deco *), |
| GFP_KERNEL); |
| |
| deco = (struct caam_deco __force **)&topregs->deco; |
| for (d = 0; d < deconum; d++) |
| ctrlpriv->deco[d] = deco[d]; |
| |
| /* |
| * 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_compatible_node(np, NULL, "fsl,sec-v4.0-job-ring") |
| rspec++; |
| ctrlpriv->jrdev = kzalloc(sizeof(struct device *) * rspec, GFP_KERNEL); |
| if (ctrlpriv->jrdev == NULL) { |
| iounmap(&topregs->ctrl); |
| return -ENOMEM; |
| } |
| |
| ring = 0; |
| ctrlpriv->total_jobrs = 0; |
| for_each_compatible_node(np, NULL, "fsl,sec-v4.0-job-ring") { |
| caam_jr_probe(pdev, np, ring); |
| ctrlpriv->total_jobrs++; |
| ring++; |
| } |
| |
| /* Check to see if QI present. If so, enable */ |
| ctrlpriv->qi_present = !!(rd_reg64(&topregs->ctrl.perfmon.comp_parms) & |
| CTPR_QI_MASK); |
| if (ctrlpriv->qi_present) { |
| ctrlpriv->qi = (struct caam_queue_if __force *)&topregs->qi; |
| /* This is all that's required to physically enable QI */ |
| wr_reg32(&topregs->qi.qi_control_lo, QICTL_DQEN); |
| } |
| |
| /* 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"); |
| caam_remove(pdev); |
| return -ENOMEM; |
| } |
| |
| /* NOTE: RTIC detection ought to go here, around Si time */ |
| |
| /* Initialize queue allocator lock */ |
| spin_lock_init(&ctrlpriv->jr_alloc_lock); |
| |
| /* Report "alive" for developer to see */ |
| dev_info(dev, "device ID = 0x%016llx\n", |
| rd_reg64(&topregs->ctrl.perfmon.caam_id)); |
| dev_info(dev, "job rings = %d, qi = %d\n", |
| ctrlpriv->total_jobrs, ctrlpriv->qi_present); |
| |
| #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("caam", NULL); |
| ctrlpriv->ctl = debugfs_create_dir("ctl", ctrlpriv->dfs_root); |
| |
| /* Controller-level - performance monitor counters */ |
| ctrlpriv->ctl_rq_dequeued = |
| debugfs_create_u64("rq_dequeued", |
| S_IRUSR | S_IRGRP | S_IROTH, |
| ctrlpriv->ctl, &perfmon->req_dequeued); |
| ctrlpriv->ctl_ob_enc_req = |
| debugfs_create_u64("ob_rq_encrypted", |
| S_IRUSR | S_IRGRP | S_IROTH, |
| ctrlpriv->ctl, &perfmon->ob_enc_req); |
| ctrlpriv->ctl_ib_dec_req = |
| debugfs_create_u64("ib_rq_decrypted", |
| S_IRUSR | S_IRGRP | S_IROTH, |
| ctrlpriv->ctl, &perfmon->ib_dec_req); |
| ctrlpriv->ctl_ob_enc_bytes = |
| debugfs_create_u64("ob_bytes_encrypted", |
| S_IRUSR | S_IRGRP | S_IROTH, |
| ctrlpriv->ctl, &perfmon->ob_enc_bytes); |
| ctrlpriv->ctl_ob_prot_bytes = |
| debugfs_create_u64("ob_bytes_protected", |
| S_IRUSR | S_IRGRP | S_IROTH, |
| ctrlpriv->ctl, &perfmon->ob_prot_bytes); |
| ctrlpriv->ctl_ib_dec_bytes = |
| debugfs_create_u64("ib_bytes_decrypted", |
| S_IRUSR | S_IRGRP | S_IROTH, |
| ctrlpriv->ctl, &perfmon->ib_dec_bytes); |
| ctrlpriv->ctl_ib_valid_bytes = |
| debugfs_create_u64("ib_bytes_validated", |
| S_IRUSR | S_IRGRP | S_IROTH, |
| ctrlpriv->ctl, &perfmon->ib_valid_bytes); |
| |
| /* Controller level - global status values */ |
| ctrlpriv->ctl_faultaddr = |
| debugfs_create_u64("fault_addr", |
| S_IRUSR | S_IRGRP | S_IROTH, |
| ctrlpriv->ctl, &perfmon->faultaddr); |
| ctrlpriv->ctl_faultdetail = |
| debugfs_create_u32("fault_detail", |
| S_IRUSR | S_IRGRP | S_IROTH, |
| ctrlpriv->ctl, &perfmon->faultdetail); |
| ctrlpriv->ctl_faultstatus = |
| debugfs_create_u32("fault_status", |
| S_IRUSR | S_IRGRP | S_IROTH, |
| ctrlpriv->ctl, &perfmon->status); |
| |
| /* Internal covering keys (useful in non-secure mode only) */ |
| ctrlpriv->ctl_kek_wrap.data = &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 = &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 = &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; |
| } |
| |
| static struct of_device_id caam_match[] = { |
| { |
| .compatible = "fsl,sec-v4.0", |
| }, |
| {}, |
| }; |
| MODULE_DEVICE_TABLE(of, caam_match); |
| |
| static struct platform_driver caam_driver = { |
| .driver = { |
| .name = "caam", |
| .owner = THIS_MODULE, |
| .of_match_table = caam_match, |
| }, |
| .probe = caam_probe, |
| .remove = __devexit_p(caam_remove), |
| }; |
| |
| static int __init caam_base_init(void) |
| { |
| return platform_driver_register(&caam_driver); |
| } |
| |
| static void __exit caam_base_exit(void) |
| { |
| return platform_driver_unregister(&caam_driver); |
| } |
| |
| module_init(caam_base_init); |
| module_exit(caam_base_exit); |
| |
| MODULE_LICENSE("GPL"); |
| MODULE_DESCRIPTION("FSL CAAM request backend"); |
| MODULE_AUTHOR("Freescale Semiconductor - NMG/STC"); |