Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 into rmobile-latest

1 files changed, 269 insertions, 0 deletions

diff --git a/drivers/crypto/caam/ctrl.c b/drivers/crypto/caam/ctrl.c
new file mode 100644
index 00000000000..9009713a3c2
--- /dev/null
+++ b/drivers/crypto/caam/ctrl.c
@@ -0,0 +1,269 @@
+/*
+ * 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_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,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");