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crypto: inside-secure - Fixed corner case TRC admin RAM probing issue

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This patch fixed a corner case admin RAM probing issue witnessed on the
Xilinx VCU118 FPGA development board with an EIP197 configuration with
4096 words of admin RAM, of which only 2050 were recognised.

Signed-off-by: Pascal van Leeuwen <pvanleeuwen@verimatrix.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Pascal van Leeuwen 2019-09-17 11:55:19 +02:00 committed by Herbert Xu
parent b8c5d882c8
commit d96cf190e5
2 changed files with 34 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

46
drivers/crypto/inside-secure/safexcel.c
View File

@ -75,9 +75,9 @@ static void eip197_trc_cache_banksel(struct safexcel_crypto_priv *priv,
}
static u32 eip197_trc_cache_probe(struct safexcel_crypto_priv *priv,
int maxbanks, u32 probemask)
int maxbanks, u32 probemask, u32 stride)
{
u32 val, addrhi, addrlo, addrmid;
u32 val, addrhi, addrlo, addrmid, addralias, delta, marker;
int actbank;
/*
@ -87,33 +87,38 @@ static u32 eip197_trc_cache_probe(struct safexcel_crypto_priv *priv,
addrhi = 1 << (16 + maxbanks);
addrlo = 0;
actbank = min(maxbanks - 1, 0);
while ((addrhi - addrlo) > 32) {
while ((addrhi - addrlo) > stride) {
/* write marker to lowest address in top half */
addrmid = (addrhi + addrlo) >> 1;
marker = (addrmid ^ 0xabadbabe) & probemask; /* Unique */
eip197_trc_cache_banksel(priv, addrmid, &actbank);
writel((addrmid | (addrlo << 16)) & probemask,
writel(marker,
priv->base + EIP197_CLASSIFICATION_RAMS +
(addrmid & 0xffff));
/* write marker to lowest address in bottom half */
eip197_trc_cache_banksel(priv, addrlo, &actbank);
writel((addrlo | (addrhi << 16)) & probemask,
/* write invalid markers to possible aliases */
delta = 1 << __fls(addrmid);
while (delta >= stride) {
addralias = addrmid - delta;
eip197_trc_cache_banksel(priv, addralias, &actbank);
writel(~marker,
priv->base + EIP197_CLASSIFICATION_RAMS +
(addrlo & 0xffff));
(addralias & 0xffff));
delta >>= 1;
}
/* read back marker from top half */
eip197_trc_cache_banksel(priv, addrmid, &actbank);
val = readl(priv->base + EIP197_CLASSIFICATION_RAMS +
(addrmid & 0xffff));
if (val == ((addrmid | (addrlo << 16)) & probemask)) {
if ((val & probemask) == marker)
/* read back correct, continue with top half */
addrlo = addrmid;
} else {
else
/* not read back correct, continue with bottom half */
addrhi = addrmid;
}
}
return addrhi;
}
@ -150,7 +155,7 @@ static void eip197_trc_cache_clear(struct safexcel_crypto_priv *priv,
htable_offset + i * sizeof(u32));
}
static void eip197_trc_cache_init(struct safexcel_crypto_priv *priv)
static int eip197_trc_cache_init(struct safexcel_crypto_priv *priv)
{
u32 val, dsize, asize;
int cs_rc_max, cs_ht_wc, cs_trc_rec_wc, cs_trc_lg_rec_wc;
@ -183,7 +188,7 @@ static void eip197_trc_cache_init(struct safexcel_crypto_priv *priv)
writel(val, priv->base + EIP197_TRC_PARAMS);
/* Probed data RAM size in bytes */
dsize = eip197_trc_cache_probe(priv, maxbanks, 0xffffffff);
dsize = eip197_trc_cache_probe(priv, maxbanks, 0xffffffff, 32);
/*
* Now probe the administration RAM size pretty much the same way
@ -196,11 +201,18 @@ static void eip197_trc_cache_init(struct safexcel_crypto_priv *priv)
writel(val, priv->base + EIP197_TRC_PARAMS);
/* Probed admin RAM size in admin words */
asize = eip197_trc_cache_probe(priv, 0, 0xbfffffff) >> 4;
asize = eip197_trc_cache_probe(priv, 0, 0x3fffffff, 16) >> 4;
/* Clear any ECC errors detected while probing! */
writel(0, priv->base + EIP197_TRC_ECCCTRL);
/* Sanity check probing results */
if (dsize < EIP197_MIN_DSIZE || asize < EIP197_MIN_ASIZE) {
dev_err(priv->dev, "Record cache probing failed (%d,%d).",
dsize, asize);
return -ENODEV;
}
/*
* Determine optimal configuration from RAM sizes
* Note that we assume that the physical RAM configuration is sane
@ -251,6 +263,7 @@ static void eip197_trc_cache_init(struct safexcel_crypto_priv *priv)
dev_info(priv->dev, "TRC init: %dd,%da (%dr,%dh)\n",
dsize, asize, cs_rc_max, cs_ht_wc + cs_ht_wc);
return 0;
}
static void eip197_init_firmware(struct safexcel_crypto_priv *priv)
@ -737,7 +750,10 @@ static int safexcel_hw_init(struct safexcel_crypto_priv *priv)
writel(GENMASK(30, 20), EIP197_HIA_AIC_G(priv) + EIP197_HIA_AIC_G_ACK);
if (priv->flags & SAFEXCEL_HW_EIP197) {
eip197_trc_cache_init(priv);
ret = eip197_trc_cache_init(priv);
if (ret)
return ret;
priv->flags |= EIP197_TRC_CACHE;
ret = eip197_load_firmwares(priv);

2
drivers/crypto/inside-secure/safexcel.h
View File

@ -439,6 +439,8 @@ struct safexcel_context_record {
#define EIP197_TRC_PARAMS2_RC_SZ_SMALL(n) ((n) << 18)
/* Cache helpers */
#define EIP197_MIN_DSIZE 1024
#define EIP197_MIN_ASIZE 8
#define EIP197_CS_TRC_REC_WC 64
#define EIP197_CS_RC_SIZE (4 * sizeof(u32))
#define EIP197_CS_RC_NEXT(x) (x)