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crypto: caam - ERA retrieval and printing for SEC device

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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 <alexandru.porosanu@freescale.com>

- rebased onto current cryptodev master
- made caam_eras static

Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Alex Porosanu 2012-07-11 11:06:11 +08:00 committed by Herbert Xu
parent 1af8ea862c
commit 82c2f9607b
3 changed files with 58 additions and 2 deletions
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41
drivers/crypto/caam/ctrl.c
View File

@ -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);

13
drivers/crypto/caam/ctrl.h Normal file
View File

@ -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 */

6
drivers/crypto/caam/regs.h
View File

@ -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 */