From 82c2f9607b8a4667e9d89613478748f4e2b7288b Mon Sep 17 00:00:00 2001 From: Alex Porosanu Date: Wed, 11 Jul 2012 11:06:11 +0800 Subject: crypto: caam - ERA retrieval and printing for SEC device This patch adds support for retrieving and printing of SEC ERA information. It is useful for knowing beforehand what features exist from the SEC point of view on a certain SoC. Only era-s 1 to 4 are currently supported; other eras will appear as unknown. Signed-off-by: Alex Porosanu - rebased onto current cryptodev master - made caam_eras static Signed-off-by: Kim Phillips Signed-off-by: Herbert Xu --- drivers/crypto/caam/ctrl.c | 41 +++++++++++++++++++++++++++++++++++++++-- drivers/crypto/caam/ctrl.h | 13 +++++++++++++ drivers/crypto/caam/regs.h | 6 ++++++ 3 files changed, 58 insertions(+), 2 deletions(-) create mode 100644 drivers/crypto/caam/ctrl.h (limited to 'drivers/crypto') diff --git a/drivers/crypto/caam/ctrl.c b/drivers/crypto/caam/ctrl.c index ac6abb375c8..414ba20c05a 100644 --- a/drivers/crypto/caam/ctrl.c +++ b/drivers/crypto/caam/ctrl.c @@ -11,6 +11,7 @@ #include "jr.h" #include "desc_constr.h" #include "error.h" +#include "ctrl.h" static int caam_remove(struct platform_device *pdev) { @@ -155,10 +156,44 @@ static void kick_trng(struct platform_device *pdev) clrbits32(&r4tst->rtmctl, RTMCTL_PRGM); } +/** + * caam_get_era() - Return the ERA of the SEC on SoC, based + * on the SEC_VID register. + * Returns the ERA number (1..4) or -ENOTSUPP if the ERA is unknown. + * @caam_id - the value of the SEC_VID register + **/ +int caam_get_era(u64 caam_id) +{ + struct sec_vid *sec_vid = (struct sec_vid *)&caam_id; + static const struct { + u16 ip_id; + u8 maj_rev; + u8 era; + } caam_eras[] = { + {0x0A10, 1, 1}, + {0x0A10, 2, 2}, + {0x0A12, 1, 3}, + {0x0A14, 1, 3}, + {0x0A14, 2, 4}, + {0x0A16, 1, 4}, + {0x0A11, 1, 4} + }; + int i; + + for (i = 0; i < ARRAY_SIZE(caam_eras); i++) + if (caam_eras[i].ip_id == sec_vid->ip_id && + caam_eras[i].maj_rev == sec_vid->maj_rev) + return caam_eras[i].era; + + return -ENOTSUPP; +} +EXPORT_SYMBOL(caam_get_era); + /* Probe routine for CAAM top (controller) level */ static int caam_probe(struct platform_device *pdev) { int ret, ring, rspec; + u64 caam_id; struct device *dev; struct device_node *nprop, *np; struct caam_ctrl __iomem *ctrl; @@ -276,9 +311,11 @@ static int caam_probe(struct platform_device *pdev) /* Initialize queue allocator lock */ spin_lock_init(&ctrlpriv->jr_alloc_lock); + caam_id = rd_reg64(&topregs->ctrl.perfmon.caam_id); + /* Report "alive" for developer to see */ - dev_info(dev, "device ID = 0x%016llx\n", - rd_reg64(&topregs->ctrl.perfmon.caam_id)); + dev_info(dev, "device ID = 0x%016llx (Era %d)\n", caam_id, + caam_get_era(caam_id)); dev_info(dev, "job rings = %d, qi = %d\n", ctrlpriv->total_jobrs, ctrlpriv->qi_present); diff --git a/drivers/crypto/caam/ctrl.h b/drivers/crypto/caam/ctrl.h new file mode 100644 index 00000000000..980d44eaaf4 --- /dev/null +++ b/drivers/crypto/caam/ctrl.h @@ -0,0 +1,13 @@ +/* + * CAAM control-plane driver backend public-level include definitions + * + * Copyright 2012 Freescale Semiconductor, Inc. + */ + +#ifndef CTRL_H +#define CTRL_H + +/* Prototypes for backend-level services exposed to APIs */ +int caam_get_era(u64 caam_id); + +#endif /* CTRL_H */ diff --git a/drivers/crypto/caam/regs.h b/drivers/crypto/caam/regs.h index 6d9f1d98297..3223fc6d647 100644 --- a/drivers/crypto/caam/regs.h +++ b/drivers/crypto/caam/regs.h @@ -117,6 +117,12 @@ struct jr_outentry { #define CHA_NUM_DECONUM_SHIFT 56 #define CHA_NUM_DECONUM_MASK (0xfull << CHA_NUM_DECONUM_SHIFT) +struct sec_vid { + u16 ip_id; + u8 maj_rev; + u8 min_rev; +}; + struct caam_perfmon { /* Performance Monitor Registers f00-f9f */ u64 req_dequeued; /* PC_REQ_DEQ - Dequeued Requests */ -- cgit v1.2.3