1 files changed, 270 insertions, 0 deletions

diff --git a/drivers/crypto/caam/ctrl.c b/drivers/crypto/caam/ctrl.c
new file mode 100644
index 000000000000..aa2216160103
--- /dev/null
+++ b/drivers/crypto/caam/ctrl.c
@@ -0,0 +1,270 @@
+/*
+ * 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,
+                      const struct of_device_id *devmatch)
+{
+        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,sec4.0-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,sec4.0-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_IFCHR | S_IRUSR | S_IRGRP | S_IROTH,
+                                   ctrlpriv->ctl, &perfmon->req_dequeued);
+        ctrlpriv->ctl_ob_enc_req =
+                debugfs_create_u64("ob_rq_encrypted",
+                                   S_IFCHR | S_IRUSR | S_IRGRP | S_IROTH,
+                                   ctrlpriv->ctl, &perfmon->ob_enc_req);
+        ctrlpriv->ctl_ib_dec_req =
+                debugfs_create_u64("ib_rq_decrypted",
+                                   S_IFCHR | S_IRUSR | S_IRGRP | S_IROTH,
+                                   ctrlpriv->ctl, &perfmon->ib_dec_req);
+        ctrlpriv->ctl_ob_enc_bytes =
+                debugfs_create_u64("ob_bytes_encrypted",
+                                   S_IFCHR | S_IRUSR | S_IRGRP | S_IROTH,
+                                   ctrlpriv->ctl, &perfmon->ob_enc_bytes);
+        ctrlpriv->ctl_ob_prot_bytes =
+                debugfs_create_u64("ob_bytes_protected",
+                                   S_IFCHR | S_IRUSR | S_IRGRP | S_IROTH,
+                                   ctrlpriv->ctl, &perfmon->ob_prot_bytes);
+        ctrlpriv->ctl_ib_dec_bytes =
+                debugfs_create_u64("ib_bytes_decrypted",
+                                   S_IFCHR | S_IRUSR | S_IRGRP | S_IROTH,
+                                   ctrlpriv->ctl, &perfmon->ib_dec_bytes);
+        ctrlpriv->ctl_ib_valid_bytes =
+                debugfs_create_u64("ib_bytes_validated",
+                                   S_IFCHR | 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_IFCHR | S_IRUSR | S_IRGRP | S_IROTH,
+                                   ctrlpriv->ctl, &perfmon->faultaddr);
+        ctrlpriv->ctl_faultdetail =
+                debugfs_create_u32("fault_detail",
+                                   S_IFCHR | S_IRUSR | S_IRGRP | S_IROTH,
+                                   ctrlpriv->ctl, &perfmon->faultdetail);
+        ctrlpriv->ctl_faultstatus =
+                debugfs_create_u32("fault_status",
+                                   S_IFCHR | 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_IFCHR | 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_IFCHR | 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_IFCHR | S_IRUSR |
+                                                 S_IRGRP | S_IROTH,
+                                                 ctrlpriv->ctl,
+                                                 &ctrlpriv->ctl_tdsk_wrap);
+#endif
+        return 0;
+}
+
+static struct of_device_id caam_match[] = {
+        {
+                .compatible = "fsl,sec4.0",
+        },
+        {},
+};
+MODULE_DEVICE_TABLE(of, caam_match);
+
+static struct of_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 of_register_platform_driver(&caam_driver);
+}
+
+static void __exit caam_base_exit(void)
+{
+        return of_unregister_platform_driver(&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");