Commit 82c2f960 authored by Alex Porosanu's avatar Alex Porosanu Committed by Herbert Xu
Browse files

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: default avatarAlex Porosanu <alexandru.porosanu@freescale.com>

- rebased onto current cryptodev master
- made caam_eras static

Signed-off-by: default avatarKim Phillips <kim.phillips@freescale.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 1af8ea86

drivers/crypto/caam/ctrl.c

+39 −2
Original line number Diff line number Diff line
@@ -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);

drivers/crypto/caam/ctrl.h

0 → 100644
+13 −0
Original line number Diff line number Diff line 
/*

 * 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 */

drivers/crypto/caam/regs.h

+6 −0
Original line number Diff line number Diff line
@@ -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	     */

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