Skip to content

Commit

Permalink
crypto: talitos - add support for 36 bit addressing
Browse files Browse the repository at this point in the history 
Enabling extended addressing in the h/w requires we always assign the
extended address component (eptr) of the talitos h/w pointer.  This is
for e500 based platforms with large memories.

Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
  • Loading branch information
Kim Phillips authored and Herbert Xu committed Aug 13, 2009
1 parent 4b99262 commit 81eb024
Show file tree
Hide file tree
Showing 2 changed files with 41 additions and 29 deletions.
69 changes: 40 additions & 29 deletions drivers/crypto/talitos.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -146,6 +146,12 @@ struct talitos_private {
#define TALITOS_FTR_SRC_LINK_TBL_LEN_INCLUDES_EXTENT 0x00000001
#define TALITOS_FTR_HW_AUTH_CHECK 0x00000002

static void to_talitos_ptr(struct talitos_ptr *talitos_ptr, dma_addr_t dma_addr)
{
talitos_ptr->ptr = cpu_to_be32(lower_32_bits(dma_addr));
talitos_ptr->eptr = cpu_to_be32(upper_32_bits(dma_addr));
}

/*
* map virtual single (contiguous) pointer to h/w descriptor pointer
*/
Expand All @@ -155,8 +161,10 @@ static void map_single_talitos_ptr(struct device *dev,
unsigned char extent,
enum dma_data_direction dir)
{
dma_addr_t dma_addr = dma_map_single(dev, data, len, dir);

talitos_ptr->len = cpu_to_be16(len);
talitos_ptr->ptr = cpu_to_be32(dma_map_single(dev, data, len, dir));
to_talitos_ptr(talitos_ptr, dma_addr);
talitos_ptr->j_extent = extent;
}

Expand Down Expand Up @@ -187,9 +195,9 @@ static int reset_channel(struct device *dev, int ch)
return -EIO;
}

/* set done writeback and IRQ */
setbits32(priv->reg + TALITOS_CCCR_LO(ch), TALITOS_CCCR_LO_CDWE |
TALITOS_CCCR_LO_CDIE);
/* set 36-bit addressing, done writeback enable and done IRQ enable */
setbits32(priv->reg + TALITOS_CCCR_LO(ch), TALITOS_CCCR_LO_EAE |
TALITOS_CCCR_LO_CDWE | TALITOS_CCCR_LO_CDIE);

/* and ICCR writeback, if available */
if (priv->features & TALITOS_FTR_HW_AUTH_CHECK)
Expand Down Expand Up @@ -312,7 +320,10 @@ static int talitos_submit(struct device *dev, struct talitos_desc *desc,

/* GO! */
wmb();
out_be32(priv->reg + TALITOS_FF_LO(ch), request->dma_desc);
out_be32(priv->reg + TALITOS_FF(ch),
cpu_to_be32(upper_32_bits(request->dma_desc)));
out_be32(priv->reg + TALITOS_FF_LO(ch),
cpu_to_be32(lower_32_bits(request->dma_desc)));

spin_unlock_irqrestore(&priv->chan[ch].head_lock, flags);

Expand Down Expand Up @@ -934,7 +945,7 @@ static int sg_to_link_tbl(struct scatterlist *sg, int sg_count,
int n_sg = sg_count;

while (n_sg--) {
link_tbl_ptr->ptr = cpu_to_be32(sg_dma_address(sg));
to_talitos_ptr(link_tbl_ptr, sg_dma_address(sg));
link_tbl_ptr->len = cpu_to_be16(sg_dma_len(sg));
link_tbl_ptr->j_extent = 0;
link_tbl_ptr++;
Expand Down Expand Up @@ -1009,7 +1020,7 @@ static int ipsec_esp(struct talitos_edesc *edesc, struct aead_request *areq,
edesc->src_is_chained);

if (sg_count == 1) {
desc->ptr[4].ptr = cpu_to_be32(sg_dma_address(areq->src));
to_talitos_ptr(&desc->ptr[4], sg_dma_address(areq->src));
} else {
sg_link_tbl_len = cryptlen;

Expand All @@ -1020,14 +1031,14 @@ static int ipsec_esp(struct talitos_edesc *edesc, struct aead_request *areq,
&edesc->link_tbl[0]);
if (sg_count > 1) {
desc->ptr[4].j_extent |= DESC_PTR_LNKTBL_JUMP;
desc->ptr[4].ptr = cpu_to_be32(edesc->dma_link_tbl);
to_talitos_ptr(&desc->ptr[4], edesc->dma_link_tbl);
dma_sync_single_for_device(dev, edesc->dma_link_tbl,
edesc->dma_len,
DMA_BIDIRECTIONAL);
} else {
/* Only one segment now, so no link tbl needed */
desc->ptr[4].ptr = cpu_to_be32(sg_dma_address(areq->
src));
to_talitos_ptr(&desc->ptr[4],
sg_dma_address(areq->src));
}
}

Expand All @@ -1042,14 +1053,14 @@ static int ipsec_esp(struct talitos_edesc *edesc, struct aead_request *areq,
edesc->dst_is_chained);

if (sg_count == 1) {
desc->ptr[5].ptr = cpu_to_be32(sg_dma_address(areq->dst));
to_talitos_ptr(&desc->ptr[5], sg_dma_address(areq->dst));
} else {
struct talitos_ptr *link_tbl_ptr =
&edesc->link_tbl[edesc->src_nents + 1];

desc->ptr[5].ptr = cpu_to_be32((struct talitos_ptr *)
edesc->dma_link_tbl +
edesc->src_nents + 1);
to_talitos_ptr(&desc->ptr[5], edesc->dma_link_tbl +
(edesc->src_nents + 1) *
sizeof(struct talitos_ptr));
sg_count = sg_to_link_tbl(areq->dst, sg_count, cryptlen,
link_tbl_ptr);

Expand All @@ -1062,11 +1073,9 @@ static int ipsec_esp(struct talitos_edesc *edesc, struct aead_request *areq,
link_tbl_ptr->len = cpu_to_be16(authsize);

/* icv data follows link tables */
link_tbl_ptr->ptr = cpu_to_be32((struct talitos_ptr *)
edesc->dma_link_tbl +
edesc->src_nents +
edesc->dst_nents + 2);

to_talitos_ptr(link_tbl_ptr, edesc->dma_link_tbl +
(edesc->src_nents + edesc->dst_nents + 2) *
sizeof(struct talitos_ptr));
desc->ptr[5].j_extent |= DESC_PTR_LNKTBL_JUMP;
dma_sync_single_for_device(ctx->dev, edesc->dma_link_tbl,
edesc->dma_len, DMA_BIDIRECTIONAL);
Expand Down Expand Up @@ -1341,7 +1350,7 @@ static int common_nonsnoop(struct talitos_edesc *edesc,

/* first DWORD empty */
desc->ptr[0].len = 0;
desc->ptr[0].ptr = 0;
to_talitos_ptr(&desc->ptr[0], 0);
desc->ptr[0].j_extent = 0;

/* cipher iv */
Expand All @@ -1365,20 +1374,20 @@ static int common_nonsnoop(struct talitos_edesc *edesc,
edesc->src_is_chained);

if (sg_count == 1) {
desc->ptr[3].ptr = cpu_to_be32(sg_dma_address(areq->src));
to_talitos_ptr(&desc->ptr[3], sg_dma_address(areq->src));
} else {
sg_count = sg_to_link_tbl(areq->src, sg_count, cryptlen,
&edesc->link_tbl[0]);
if (sg_count > 1) {
to_talitos_ptr(&desc->ptr[3], edesc->dma_link_tbl);
desc->ptr[3].j_extent |= DESC_PTR_LNKTBL_JUMP;
desc->ptr[3].ptr = cpu_to_be32(edesc->dma_link_tbl);
dma_sync_single_for_device(dev, edesc->dma_link_tbl,
edesc->dma_len,
DMA_BIDIRECTIONAL);
} else {
/* Only one segment now, so no link tbl needed */
desc->ptr[3].ptr = cpu_to_be32(sg_dma_address(areq->
src));
to_talitos_ptr(&desc->ptr[3],
sg_dma_address(areq->src));
}
}

Expand All @@ -1393,15 +1402,15 @@ static int common_nonsnoop(struct talitos_edesc *edesc,
edesc->dst_is_chained);

if (sg_count == 1) {
desc->ptr[4].ptr = cpu_to_be32(sg_dma_address(areq->dst));
to_talitos_ptr(&desc->ptr[4], sg_dma_address(areq->dst));
} else {
struct talitos_ptr *link_tbl_ptr =
&edesc->link_tbl[edesc->src_nents + 1];

to_talitos_ptr(&desc->ptr[4], edesc->dma_link_tbl +
(edesc->src_nents + 1) *
sizeof(struct talitos_ptr));
desc->ptr[4].j_extent |= DESC_PTR_LNKTBL_JUMP;
desc->ptr[4].ptr = cpu_to_be32((struct talitos_ptr *)
edesc->dma_link_tbl +
edesc->src_nents + 1);
sg_count = sg_to_link_tbl(areq->dst, sg_count, cryptlen,
link_tbl_ptr);
dma_sync_single_for_device(ctx->dev, edesc->dma_link_tbl,
Expand All @@ -1414,7 +1423,7 @@ static int common_nonsnoop(struct talitos_edesc *edesc,

/* last DWORD empty */
desc->ptr[6].len = 0;
desc->ptr[6].ptr = 0;
to_talitos_ptr(&desc->ptr[6], 0);
desc->ptr[6].j_extent = 0;

ret = talitos_submit(dev, desc, callback, areq);
Expand Down Expand Up @@ -1898,6 +1907,8 @@ static int talitos_probe(struct of_device *ofdev,
atomic_set(&priv->chan[i].submit_count,
-(priv->chfifo_len - 1));

dma_set_mask(dev, DMA_BIT_MASK(36));

/* reset and initialize the h/w */
err = init_device(dev);
if (err) {
Expand Down
1 change: 1 addition & 0 deletions drivers/crypto/talitos.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -57,6 +57,7 @@
#define TALITOS_CCCR_RESET 0x1 /* channel reset */
#define TALITOS_CCCR_LO(ch) (ch * TALITOS_CH_STRIDE + 0x110c)
#define TALITOS_CCCR_LO_IWSE 0x80 /* chan. ICCR writeback enab. */
#define TALITOS_CCCR_LO_EAE 0x20 /* extended address enable */
#define TALITOS_CCCR_LO_CDWE 0x10 /* chan. done writeback enab. */
#define TALITOS_CCCR_LO_NT 0x4 /* notification type */
#define TALITOS_CCCR_LO_CDIE 0x2 /* channel done IRQ enable */
Expand Down

0 comments on commit 81eb024

Please sign in to comment.