[PATCH] ERA retrieval and printing for SEC device
From: Alex Porosanu <hidden>
Date: 2012-06-27 04:50:00
Subsystem:
crypto api, freescale caam (cryptographic acceleration and assurance module) driver, the rest · Maintainers:
Herbert Xu, "David S. Miller", Horia Geantă, Pankaj Gupta, Gaurav Jain, Linus Torvalds
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 <redacted> --- 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
diff --git a/drivers/crypto/caam/ctrl.c b/drivers/crypto/caam/ctrl.c
index 77557eb..5fde51e 100644
--- a/drivers/crypto/caam/ctrl.c
+++ b/drivers/crypto/caam/ctrl.c@@ -9,6 +9,7 @@ #include "regs.h" #include "intern.h" #include "jr.h" +#include "ctrl.h" static int caam_remove(struct platform_device *pdev) {
@@ -43,10 +44,44 @@ static int caam_remove(struct platform_device *pdev) return ret; } +/** + * 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; + 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 ring, rspec; + u64 caam_id; struct device *dev; struct device_node *nprop, *np; struct caam_ctrl __iomem *ctrl;
@@ -146,9 +181,11 @@ 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 0000000..980d44e
--- /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 e9f7a70..2055a70 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 */
--
1.7.7.6