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path: root/drivers/crypto/talitos.c
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Diffstat (limited to 'drivers/crypto/talitos.c')
-rw-r--r--drivers/crypto/talitos.c153
1 files changed, 97 insertions, 56 deletions
diff --git a/drivers/crypto/talitos.c b/drivers/crypto/talitos.c
index 2460766..a3918c1 100644
--- a/drivers/crypto/talitos.c
+++ b/drivers/crypto/talitos.c
@@ -127,7 +127,6 @@ struct talitos_private {
/* request callback tasklet */
struct tasklet_struct done_task;
- struct tasklet_struct error_task;
/* list of registered algorithms */
struct list_head alg_list;
@@ -138,6 +137,7 @@ struct talitos_private {
/* .features flag */
#define TALITOS_FTR_SRC_LINK_TBL_LEN_INCLUDES_EXTENT 0x00000001
+#define TALITOS_FTR_HW_AUTH_CHECK 0x00000002
/*
* map virtual single (contiguous) pointer to h/w descriptor pointer
@@ -184,6 +184,11 @@ static int reset_channel(struct device *dev, int ch)
setbits32(priv->reg + TALITOS_CCCR_LO(ch), TALITOS_CCCR_LO_CDWE |
TALITOS_CCCR_LO_CDIE);
+ /* and ICCR writeback, if available */
+ if (priv->features & TALITOS_FTR_HW_AUTH_CHECK)
+ setbits32(priv->reg + TALITOS_CCCR_LO(ch),
+ TALITOS_CCCR_LO_IWSE);
+
return 0;
}
@@ -239,6 +244,11 @@ static int init_device(struct device *dev)
setbits32(priv->reg + TALITOS_IMR, TALITOS_IMR_INIT);
setbits32(priv->reg + TALITOS_IMR_LO, TALITOS_IMR_LO_INIT);
+ /* disable integrity check error interrupts (use writeback instead) */
+ if (priv->features & TALITOS_FTR_HW_AUTH_CHECK)
+ setbits32(priv->reg + TALITOS_MDEUICR_LO,
+ TALITOS_MDEUICR_LO_ICE);
+
return 0;
}
@@ -370,6 +380,12 @@ static void talitos_done(unsigned long data)
for (ch = 0; ch < priv->num_channels; ch++)
flush_channel(dev, ch, 0, 0);
+
+ /* At this point, all completed channels have been processed.
+ * Unmask done interrupts for channels completed later on.
+ */
+ setbits32(priv->reg + TALITOS_IMR, TALITOS_IMR_INIT);
+ setbits32(priv->reg + TALITOS_IMR_LO, TALITOS_IMR_LO_INIT);
}
/*
@@ -469,16 +485,13 @@ static void report_eu_error(struct device *dev, int ch, struct talitos_desc *des
/*
* recover from error interrupts
*/
-static void talitos_error(unsigned long data)
+static void talitos_error(unsigned long data, u32 isr, u32 isr_lo)
{
struct device *dev = (struct device *)data;
struct talitos_private *priv = dev_get_drvdata(dev);
unsigned int timeout = TALITOS_TIMEOUT;
int ch, error, reset_dev = 0, reset_ch = 0;
- u32 isr, isr_lo, v, v_lo;
-
- isr = in_be32(priv->reg + TALITOS_ISR);
- isr_lo = in_be32(priv->reg + TALITOS_ISR_LO);
+ u32 v, v_lo;
for (ch = 0; ch < priv->num_channels; ch++) {
/* skip channels without errors */
@@ -560,16 +573,19 @@ static irqreturn_t talitos_interrupt(int irq, void *data)
isr = in_be32(priv->reg + TALITOS_ISR);
isr_lo = in_be32(priv->reg + TALITOS_ISR_LO);
-
- /* ack */
+ /* Acknowledge interrupt */
out_be32(priv->reg + TALITOS_ICR, isr);
out_be32(priv->reg + TALITOS_ICR_LO, isr_lo);
if (unlikely((isr & ~TALITOS_ISR_CHDONE) || isr_lo))
- talitos_error((unsigned long)data);
+ talitos_error((unsigned long)data, isr, isr_lo);
else
- if (likely(isr & TALITOS_ISR_CHDONE))
+ if (likely(isr & TALITOS_ISR_CHDONE)) {
+ /* mask further done interrupts. */
+ clrbits32(priv->reg + TALITOS_IMR, TALITOS_IMR_DONE);
+ /* done_task will unmask done interrupts at exit */
tasklet_schedule(&priv->done_task);
+ }
return (isr || isr_lo) ? IRQ_HANDLED : IRQ_NONE;
}
@@ -802,7 +818,7 @@ static void ipsec_esp_encrypt_done(struct device *dev,
aead_request_complete(areq, err);
}
-static void ipsec_esp_decrypt_done(struct device *dev,
+static void ipsec_esp_decrypt_swauth_done(struct device *dev,
struct talitos_desc *desc, void *context,
int err)
{
@@ -834,6 +850,27 @@ static void ipsec_esp_decrypt_done(struct device *dev,
aead_request_complete(req, err);
}
+static void ipsec_esp_decrypt_hwauth_done(struct device *dev,
+ struct talitos_desc *desc, void *context,
+ int err)
+{
+ struct aead_request *req = context;
+ struct ipsec_esp_edesc *edesc =
+ container_of(desc, struct ipsec_esp_edesc, desc);
+
+ ipsec_esp_unmap(dev, edesc, req);
+
+ /* check ICV auth status */
+ if (!err)
+ if ((desc->hdr_lo & DESC_HDR_LO_ICCR1_MASK) !=
+ DESC_HDR_LO_ICCR1_PASS)
+ err = -EBADMSG;
+
+ kfree(edesc);
+
+ aead_request_complete(req, err);
+}
+
/*
* convert scatterlist to SEC h/w link table format
* stop at cryptlen bytes
@@ -887,6 +924,7 @@ static int ipsec_esp(struct ipsec_esp_edesc *edesc, struct aead_request *areq,
unsigned int authsize = ctx->authsize;
unsigned int ivsize;
int sg_count, ret;
+ int sg_link_tbl_len;
/* hmac key */
map_single_talitos_ptr(dev, &desc->ptr[0], ctx->authkeylen, &ctx->key,
@@ -924,33 +962,19 @@ static int ipsec_esp(struct ipsec_esp_edesc *edesc, struct aead_request *areq,
if (sg_count == 1) {
desc->ptr[4].ptr = cpu_to_be32(sg_dma_address(areq->src));
} else {
- sg_count = sg_to_link_tbl(areq->src, sg_count, cryptlen,
+ sg_link_tbl_len = cryptlen;
+
+ if ((edesc->desc.hdr & DESC_HDR_MODE1_MDEU_CICV) &&
+ (edesc->desc.hdr & DESC_HDR_MODE0_ENCRYPT) == 0) {
+ sg_link_tbl_len = cryptlen + authsize;
+ }
+ sg_count = sg_to_link_tbl(areq->src, sg_count, sg_link_tbl_len,
&edesc->link_tbl[0]);
if (sg_count > 1) {
- struct talitos_ptr *link_tbl_ptr =
- &edesc->link_tbl[sg_count-1];
- struct scatterlist *sg;
- struct talitos_private *priv = dev_get_drvdata(dev);
-
desc->ptr[4].j_extent |= DESC_PTR_LNKTBL_JUMP;
desc->ptr[4].ptr = cpu_to_be32(edesc->dma_link_tbl);
dma_sync_single_for_device(ctx->dev, edesc->dma_link_tbl,
edesc->dma_len, DMA_BIDIRECTIONAL);
- /* If necessary for this SEC revision,
- * add a link table entry for ICV.
- */
- if ((priv->features &
- TALITOS_FTR_SRC_LINK_TBL_LEN_INCLUDES_EXTENT) &&
- (edesc->desc.hdr & DESC_HDR_MODE0_ENCRYPT) == 0) {
- link_tbl_ptr->j_extent = 0;
- link_tbl_ptr++;
- link_tbl_ptr->j_extent = DESC_PTR_LNKTBL_RETURN;
- link_tbl_ptr->len = cpu_to_be16(authsize);
- sg = sg_last(areq->src, edesc->src_nents ? : 1);
- link_tbl_ptr->ptr = cpu_to_be32(
- (char *)sg_dma_address(sg)
- + sg->length - authsize);
- }
} else {
/* Only one segment now, so no link tbl needed */
desc->ptr[4].ptr = cpu_to_be32(sg_dma_address(areq->src));
@@ -975,13 +999,9 @@ static int ipsec_esp(struct ipsec_esp_edesc *edesc, struct aead_request *areq,
desc->ptr[5].ptr = cpu_to_be32((struct talitos_ptr *)
edesc->dma_link_tbl +
edesc->src_nents + 1);
- if (areq->src == areq->dst) {
- memcpy(link_tbl_ptr, &edesc->link_tbl[0],
- edesc->src_nents * sizeof(struct talitos_ptr));
- } else {
- sg_count = sg_to_link_tbl(areq->dst, sg_count, cryptlen,
- link_tbl_ptr);
- }
+ sg_count = sg_to_link_tbl(areq->dst, sg_count, cryptlen,
+ link_tbl_ptr);
+
/* Add an entry to the link table for ICV data */
link_tbl_ptr += sg_count - 1;
link_tbl_ptr->j_extent = 0;
@@ -1106,11 +1126,14 @@ static int aead_authenc_encrypt(struct aead_request *req)
return ipsec_esp(edesc, req, NULL, 0, ipsec_esp_encrypt_done);
}
+
+
static int aead_authenc_decrypt(struct aead_request *req)
{
struct crypto_aead *authenc = crypto_aead_reqtfm(req);
struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
unsigned int authsize = ctx->authsize;
+ struct talitos_private *priv = dev_get_drvdata(ctx->dev);
struct ipsec_esp_edesc *edesc;
struct scatterlist *sg;
void *icvdata;
@@ -1122,22 +1145,39 @@ static int aead_authenc_decrypt(struct aead_request *req)
if (IS_ERR(edesc))
return PTR_ERR(edesc);
- /* stash incoming ICV for later cmp with ICV generated by the h/w */
- if (edesc->dma_len)
- icvdata = &edesc->link_tbl[edesc->src_nents +
- edesc->dst_nents + 2];
- else
- icvdata = &edesc->link_tbl[0];
+ if ((priv->features & TALITOS_FTR_HW_AUTH_CHECK) &&
+ (((!edesc->src_nents && !edesc->dst_nents) ||
+ priv->features & TALITOS_FTR_SRC_LINK_TBL_LEN_INCLUDES_EXTENT))) {
+
+ /* decrypt and check the ICV */
+ edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_DIR_INBOUND |
+ DESC_HDR_MODE1_MDEU_CICV;
+
+ /* reset integrity check result bits */
+ edesc->desc.hdr_lo = 0;
+
+ return ipsec_esp(edesc, req, NULL, 0, ipsec_esp_decrypt_hwauth_done);
+
+ } else {
+
+ /* Have to check the ICV with software */
- sg = sg_last(req->src, edesc->src_nents ? : 1);
+ edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_DIR_INBOUND;
+
+ /* stash incoming ICV for later cmp with ICV generated by the h/w */
+ if (edesc->dma_len)
+ icvdata = &edesc->link_tbl[edesc->src_nents +
+ edesc->dst_nents + 2];
+ else
+ icvdata = &edesc->link_tbl[0];
- memcpy(icvdata, (char *)sg_virt(sg) + sg->length - ctx->authsize,
- ctx->authsize);
+ sg = sg_last(req->src, edesc->src_nents ? : 1);
- /* decrypt */
- edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_DIR_INBOUND;
+ memcpy(icvdata, (char *)sg_virt(sg) + sg->length - ctx->authsize,
+ ctx->authsize);
- return ipsec_esp(edesc, req, NULL, 0, ipsec_esp_decrypt_done);
+ return ipsec_esp(edesc, req, NULL, 0, ipsec_esp_decrypt_swauth_done);
+ }
}
static int aead_authenc_givencrypt(
@@ -1391,7 +1431,6 @@ static int talitos_remove(struct of_device *ofdev)
}
tasklet_kill(&priv->done_task);
- tasklet_kill(&priv->error_task);
iounmap(priv->reg);
@@ -1451,10 +1490,9 @@ static int talitos_probe(struct of_device *ofdev,
priv->ofdev = ofdev;
- INIT_LIST_HEAD(&priv->alg_list);
-
tasklet_init(&priv->done_task, talitos_done, (unsigned long)dev);
- tasklet_init(&priv->error_task, talitos_error, (unsigned long)dev);
+
+ INIT_LIST_HEAD(&priv->alg_list);
priv->irq = irq_of_parse_and_map(np, 0);
@@ -1508,6 +1546,9 @@ static int talitos_probe(struct of_device *ofdev,
if (of_device_is_compatible(np, "fsl,sec3.0"))
priv->features |= TALITOS_FTR_SRC_LINK_TBL_LEN_INCLUDES_EXTENT;
+ if (of_device_is_compatible(np, "fsl,sec2.1"))
+ priv->features |= TALITOS_FTR_HW_AUTH_CHECK;
+
priv->head_lock = kmalloc(sizeof(spinlock_t) * priv->num_channels,
GFP_KERNEL);
priv->tail_lock = kmalloc(sizeof(spinlock_t) * priv->num_channels,
@@ -1551,7 +1592,7 @@ static int talitos_probe(struct of_device *ofdev,
goto err_out;
}
for (i = 0; i < priv->num_channels; i++)
- atomic_set(&priv->submit_count[i], -priv->chfifo_len);
+ atomic_set(&priv->submit_count[i], -(priv->chfifo_len - 1));
priv->head = kzalloc(sizeof(int) * priv->num_channels, GFP_KERNEL);
priv->tail = kzalloc(sizeof(int) * priv->num_channels, GFP_KERNEL);
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