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-rw-r--r--crypto/async_tx/async_pq.c72
-rw-r--r--crypto/async_tx/async_raid6_recov.c163
-rw-r--r--crypto/async_tx/async_xor.c120
-rw-r--r--crypto/async_tx/raid6test.c24
4 files changed, 287 insertions, 92 deletions
diff --git a/crypto/async_tx/async_pq.c b/crypto/async_tx/async_pq.c
index 341ece61cf9b..f9cdc5e91664 100644
--- a/crypto/async_tx/async_pq.c
+++ b/crypto/async_tx/async_pq.c
@@ -104,7 +104,7 @@ do_async_gen_syndrome(struct dma_chan *chan,
* do_sync_gen_syndrome - synchronously calculate a raid6 syndrome
*/
static void
-do_sync_gen_syndrome(struct page **blocks, unsigned int offset, int disks,
+do_sync_gen_syndrome(struct page **blocks, unsigned int *offsets, int disks,
size_t len, struct async_submit_ctl *submit)
{
void **srcs;
@@ -121,7 +121,8 @@ do_sync_gen_syndrome(struct page **blocks, unsigned int offset, int disks,
BUG_ON(i > disks - 3); /* P or Q can't be zero */
srcs[i] = (void*)raid6_empty_zero_page;
} else {
- srcs[i] = page_address(blocks[i]) + offset;
+ srcs[i] = page_address(blocks[i]) + offsets[i];
+
if (i < disks - 2) {
stop = i;
if (start == -1)
@@ -138,10 +139,23 @@ do_sync_gen_syndrome(struct page **blocks, unsigned int offset, int disks,
async_tx_sync_epilog(submit);
}
+static inline bool
+is_dma_pq_aligned_offs(struct dma_device *dev, unsigned int *offs,
+ int src_cnt, size_t len)
+{
+ int i;
+
+ for (i = 0; i < src_cnt; i++) {
+ if (!is_dma_pq_aligned(dev, offs[i], 0, len))
+ return false;
+ }
+ return true;
+}
+
/**
* async_gen_syndrome - asynchronously calculate a raid6 syndrome
* @blocks: source blocks from idx 0..disks-3, P @ disks-2 and Q @ disks-1
- * @offset: common offset into each block (src and dest) to start transaction
+ * @offsets: offset array into each block (src and dest) to start transaction
* @disks: number of blocks (including missing P or Q, see below)
* @len: length of operation in bytes
* @submit: submission/completion modifiers
@@ -160,7 +174,7 @@ do_sync_gen_syndrome(struct page **blocks, unsigned int offset, int disks,
* path.
*/
struct dma_async_tx_descriptor *
-async_gen_syndrome(struct page **blocks, unsigned int offset, int disks,
+async_gen_syndrome(struct page **blocks, unsigned int *offsets, int disks,
size_t len, struct async_submit_ctl *submit)
{
int src_cnt = disks - 2;
@@ -179,7 +193,7 @@ async_gen_syndrome(struct page **blocks, unsigned int offset, int disks,
if (unmap && !(submit->flags & ASYNC_TX_PQ_XOR_DST) &&
(src_cnt <= dma_maxpq(device, 0) ||
dma_maxpq(device, DMA_PREP_CONTINUE) > 0) &&
- is_dma_pq_aligned(device, offset, 0, len)) {
+ is_dma_pq_aligned_offs(device, offsets, disks, len)) {
struct dma_async_tx_descriptor *tx;
enum dma_ctrl_flags dma_flags = 0;
unsigned char coefs[MAX_DISKS];
@@ -196,8 +210,8 @@ async_gen_syndrome(struct page **blocks, unsigned int offset, int disks,
for (i = 0, j = 0; i < src_cnt; i++) {
if (blocks[i] == NULL)
continue;
- unmap->addr[j] = dma_map_page(device->dev, blocks[i], offset,
- len, DMA_TO_DEVICE);
+ unmap->addr[j] = dma_map_page(device->dev, blocks[i],
+ offsets[i], len, DMA_TO_DEVICE);
coefs[j] = raid6_gfexp[i];
unmap->to_cnt++;
j++;
@@ -210,7 +224,8 @@ async_gen_syndrome(struct page **blocks, unsigned int offset, int disks,
unmap->bidi_cnt++;
if (P(blocks, disks))
unmap->addr[j++] = dma_map_page(device->dev, P(blocks, disks),
- offset, len, DMA_BIDIRECTIONAL);
+ P(offsets, disks),
+ len, DMA_BIDIRECTIONAL);
else {
unmap->addr[j++] = 0;
dma_flags |= DMA_PREP_PQ_DISABLE_P;
@@ -219,7 +234,8 @@ async_gen_syndrome(struct page **blocks, unsigned int offset, int disks,
unmap->bidi_cnt++;
if (Q(blocks, disks))
unmap->addr[j++] = dma_map_page(device->dev, Q(blocks, disks),
- offset, len, DMA_BIDIRECTIONAL);
+ Q(offsets, disks),
+ len, DMA_BIDIRECTIONAL);
else {
unmap->addr[j++] = 0;
dma_flags |= DMA_PREP_PQ_DISABLE_Q;
@@ -240,13 +256,13 @@ async_gen_syndrome(struct page **blocks, unsigned int offset, int disks,
if (!P(blocks, disks)) {
P(blocks, disks) = pq_scribble_page;
- BUG_ON(len + offset > PAGE_SIZE);
+ P(offsets, disks) = 0;
}
if (!Q(blocks, disks)) {
Q(blocks, disks) = pq_scribble_page;
- BUG_ON(len + offset > PAGE_SIZE);
+ Q(offsets, disks) = 0;
}
- do_sync_gen_syndrome(blocks, offset, disks, len, submit);
+ do_sync_gen_syndrome(blocks, offsets, disks, len, submit);
return NULL;
}
@@ -270,6 +286,7 @@ pq_val_chan(struct async_submit_ctl *submit, struct page **blocks, int disks, si
* @len: length of operation in bytes
* @pqres: on val failure SUM_CHECK_P_RESULT and/or SUM_CHECK_Q_RESULT are set
* @spare: temporary result buffer for the synchronous case
+ * @s_off: spare buffer page offset
* @submit: submission / completion modifiers
*
* The same notes from async_gen_syndrome apply to the 'blocks',
@@ -278,9 +295,9 @@ pq_val_chan(struct async_submit_ctl *submit, struct page **blocks, int disks, si
* specified.
*/
struct dma_async_tx_descriptor *
-async_syndrome_val(struct page **blocks, unsigned int offset, int disks,
+async_syndrome_val(struct page **blocks, unsigned int *offsets, int disks,
size_t len, enum sum_check_flags *pqres, struct page *spare,
- struct async_submit_ctl *submit)
+ unsigned int s_off, struct async_submit_ctl *submit)
{
struct dma_chan *chan = pq_val_chan(submit, blocks, disks, len);
struct dma_device *device = chan ? chan->device : NULL;
@@ -295,7 +312,7 @@ async_syndrome_val(struct page **blocks, unsigned int offset, int disks,
unmap = dmaengine_get_unmap_data(device->dev, disks, GFP_NOWAIT);
if (unmap && disks <= dma_maxpq(device, 0) &&
- is_dma_pq_aligned(device, offset, 0, len)) {
+ is_dma_pq_aligned_offs(device, offsets, disks, len)) {
struct device *dev = device->dev;
dma_addr_t pq[2];
int i, j = 0, src_cnt = 0;
@@ -307,7 +324,7 @@ async_syndrome_val(struct page **blocks, unsigned int offset, int disks,
for (i = 0; i < disks-2; i++)
if (likely(blocks[i])) {
unmap->addr[j] = dma_map_page(dev, blocks[i],
- offset, len,
+ offsets[i], len,
DMA_TO_DEVICE);
coefs[j] = raid6_gfexp[i];
unmap->to_cnt++;
@@ -320,7 +337,7 @@ async_syndrome_val(struct page **blocks, unsigned int offset, int disks,
dma_flags |= DMA_PREP_PQ_DISABLE_P;
} else {
pq[0] = dma_map_page(dev, P(blocks, disks),
- offset, len,
+ P(offsets, disks), len,
DMA_TO_DEVICE);
unmap->addr[j++] = pq[0];
unmap->to_cnt++;
@@ -330,7 +347,7 @@ async_syndrome_val(struct page **blocks, unsigned int offset, int disks,
dma_flags |= DMA_PREP_PQ_DISABLE_Q;
} else {
pq[1] = dma_map_page(dev, Q(blocks, disks),
- offset, len,
+ Q(offsets, disks), len,
DMA_TO_DEVICE);
unmap->addr[j++] = pq[1];
unmap->to_cnt++;
@@ -355,7 +372,9 @@ async_syndrome_val(struct page **blocks, unsigned int offset, int disks,
async_tx_submit(chan, tx, submit);
} else {
struct page *p_src = P(blocks, disks);
+ unsigned int p_off = P(offsets, disks);
struct page *q_src = Q(blocks, disks);
+ unsigned int q_off = Q(offsets, disks);
enum async_tx_flags flags_orig = submit->flags;
dma_async_tx_callback cb_fn_orig = submit->cb_fn;
void *scribble = submit->scribble;
@@ -381,27 +400,32 @@ async_syndrome_val(struct page **blocks, unsigned int offset, int disks,
if (p_src) {
init_async_submit(submit, ASYNC_TX_XOR_ZERO_DST, NULL,
NULL, NULL, scribble);
- tx = async_xor(spare, blocks, offset, disks-2, len, submit);
+ tx = async_xor_offs(spare, s_off,
+ blocks, offsets, disks-2, len, submit);
async_tx_quiesce(&tx);
- p = page_address(p_src) + offset;
- s = page_address(spare) + offset;
+ p = page_address(p_src) + p_off;
+ s = page_address(spare) + s_off;
*pqres |= !!memcmp(p, s, len) << SUM_CHECK_P;
}
if (q_src) {
P(blocks, disks) = NULL;
Q(blocks, disks) = spare;
+ Q(offsets, disks) = s_off;
init_async_submit(submit, 0, NULL, NULL, NULL, scribble);
- tx = async_gen_syndrome(blocks, offset, disks, len, submit);
+ tx = async_gen_syndrome(blocks, offsets, disks,
+ len, submit);
async_tx_quiesce(&tx);
- q = page_address(q_src) + offset;
- s = page_address(spare) + offset;
+ q = page_address(q_src) + q_off;
+ s = page_address(spare) + s_off;
*pqres |= !!memcmp(q, s, len) << SUM_CHECK_Q;
}
/* restore P, Q and submit */
P(blocks, disks) = p_src;
+ P(offsets, disks) = p_off;
Q(blocks, disks) = q_src;
+ Q(offsets, disks) = q_off;
submit->cb_fn = cb_fn_orig;
submit->cb_param = cb_param_orig;
diff --git a/crypto/async_tx/async_raid6_recov.c b/crypto/async_tx/async_raid6_recov.c
index f249142ceac4..354b8cd5537f 100644
--- a/crypto/async_tx/async_raid6_recov.c
+++ b/crypto/async_tx/async_raid6_recov.c
@@ -15,8 +15,9 @@
#include <linux/dmaengine.h>
static struct dma_async_tx_descriptor *
-async_sum_product(struct page *dest, struct page **srcs, unsigned char *coef,
- size_t len, struct async_submit_ctl *submit)
+async_sum_product(struct page *dest, unsigned int d_off,
+ struct page **srcs, unsigned int *src_offs, unsigned char *coef,
+ size_t len, struct async_submit_ctl *submit)
{
struct dma_chan *chan = async_tx_find_channel(submit, DMA_PQ,
&dest, 1, srcs, 2, len);
@@ -37,11 +38,14 @@ async_sum_product(struct page *dest, struct page **srcs, unsigned char *coef,
if (submit->flags & ASYNC_TX_FENCE)
dma_flags |= DMA_PREP_FENCE;
- unmap->addr[0] = dma_map_page(dev, srcs[0], 0, len, DMA_TO_DEVICE);
- unmap->addr[1] = dma_map_page(dev, srcs[1], 0, len, DMA_TO_DEVICE);
+ unmap->addr[0] = dma_map_page(dev, srcs[0], src_offs[0],
+ len, DMA_TO_DEVICE);
+ unmap->addr[1] = dma_map_page(dev, srcs[1], src_offs[1],
+ len, DMA_TO_DEVICE);
unmap->to_cnt = 2;
- unmap->addr[2] = dma_map_page(dev, dest, 0, len, DMA_BIDIRECTIONAL);
+ unmap->addr[2] = dma_map_page(dev, dest, d_off,
+ len, DMA_BIDIRECTIONAL);
unmap->bidi_cnt = 1;
/* engine only looks at Q, but expects it to follow P */
pq[1] = unmap->addr[2];
@@ -66,9 +70,9 @@ async_sum_product(struct page *dest, struct page **srcs, unsigned char *coef,
async_tx_quiesce(&submit->depend_tx);
amul = raid6_gfmul[coef[0]];
bmul = raid6_gfmul[coef[1]];
- a = page_address(srcs[0]);
- b = page_address(srcs[1]);
- c = page_address(dest);
+ a = page_address(srcs[0]) + src_offs[0];
+ b = page_address(srcs[1]) + src_offs[1];
+ c = page_address(dest) + d_off;
while (len--) {
ax = amul[*a++];
@@ -80,8 +84,9 @@ async_sum_product(struct page *dest, struct page **srcs, unsigned char *coef,
}
static struct dma_async_tx_descriptor *
-async_mult(struct page *dest, struct page *src, u8 coef, size_t len,
- struct async_submit_ctl *submit)
+async_mult(struct page *dest, unsigned int d_off, struct page *src,
+ unsigned int s_off, u8 coef, size_t len,
+ struct async_submit_ctl *submit)
{
struct dma_chan *chan = async_tx_find_channel(submit, DMA_PQ,
&dest, 1, &src, 1, len);
@@ -101,9 +106,11 @@ async_mult(struct page *dest, struct page *src, u8 coef, size_t len,
if (submit->flags & ASYNC_TX_FENCE)
dma_flags |= DMA_PREP_FENCE;
- unmap->addr[0] = dma_map_page(dev, src, 0, len, DMA_TO_DEVICE);
+ unmap->addr[0] = dma_map_page(dev, src, s_off,
+ len, DMA_TO_DEVICE);
unmap->to_cnt++;
- unmap->addr[1] = dma_map_page(dev, dest, 0, len, DMA_BIDIRECTIONAL);
+ unmap->addr[1] = dma_map_page(dev, dest, d_off,
+ len, DMA_BIDIRECTIONAL);
dma_dest[1] = unmap->addr[1];
unmap->bidi_cnt++;
unmap->len = len;
@@ -133,8 +140,8 @@ async_mult(struct page *dest, struct page *src, u8 coef, size_t len,
*/
async_tx_quiesce(&submit->depend_tx);
qmul = raid6_gfmul[coef];
- d = page_address(dest);
- s = page_address(src);
+ d = page_address(dest) + d_off;
+ s = page_address(src) + s_off;
while (len--)
*d++ = qmul[*s++];
@@ -144,11 +151,14 @@ async_mult(struct page *dest, struct page *src, u8 coef, size_t len,
static struct dma_async_tx_descriptor *
__2data_recov_4(int disks, size_t bytes, int faila, int failb,
- struct page **blocks, struct async_submit_ctl *submit)
+ struct page **blocks, unsigned int *offs,
+ struct async_submit_ctl *submit)
{
struct dma_async_tx_descriptor *tx = NULL;
struct page *p, *q, *a, *b;
+ unsigned int p_off, q_off, a_off, b_off;
struct page *srcs[2];
+ unsigned int src_offs[2];
unsigned char coef[2];
enum async_tx_flags flags = submit->flags;
dma_async_tx_callback cb_fn = submit->cb_fn;
@@ -156,26 +166,34 @@ __2data_recov_4(int disks, size_t bytes, int faila, int failb,
void *scribble = submit->scribble;
p = blocks[disks-2];
+ p_off = offs[disks-2];
q = blocks[disks-1];
+ q_off = offs[disks-1];
a = blocks[faila];
+ a_off = offs[faila];
b = blocks[failb];
+ b_off = offs[failb];
/* in the 4 disk case P + Pxy == P and Q + Qxy == Q */
/* Dx = A*(P+Pxy) + B*(Q+Qxy) */
srcs[0] = p;
+ src_offs[0] = p_off;
srcs[1] = q;
+ src_offs[1] = q_off;
coef[0] = raid6_gfexi[failb-faila];
coef[1] = raid6_gfinv[raid6_gfexp[faila]^raid6_gfexp[failb]];
init_async_submit(submit, ASYNC_TX_FENCE, tx, NULL, NULL, scribble);
- tx = async_sum_product(b, srcs, coef, bytes, submit);
+ tx = async_sum_product(b, b_off, srcs, src_offs, coef, bytes, submit);
/* Dy = P+Pxy+Dx */
srcs[0] = p;
+ src_offs[0] = p_off;
srcs[1] = b;
+ src_offs[1] = b_off;
init_async_submit(submit, flags | ASYNC_TX_XOR_ZERO_DST, tx, cb_fn,
cb_param, scribble);
- tx = async_xor(a, srcs, 0, 2, bytes, submit);
+ tx = async_xor_offs(a, a_off, srcs, src_offs, 2, bytes, submit);
return tx;
@@ -183,11 +201,14 @@ __2data_recov_4(int disks, size_t bytes, int faila, int failb,
static struct dma_async_tx_descriptor *
__2data_recov_5(int disks, size_t bytes, int faila, int failb,
- struct page **blocks, struct async_submit_ctl *submit)
+ struct page **blocks, unsigned int *offs,
+ struct async_submit_ctl *submit)
{
struct dma_async_tx_descriptor *tx = NULL;
struct page *p, *q, *g, *dp, *dq;
+ unsigned int p_off, q_off, g_off, dp_off, dq_off;
struct page *srcs[2];
+ unsigned int src_offs[2];
unsigned char coef[2];
enum async_tx_flags flags = submit->flags;
dma_async_tx_callback cb_fn = submit->cb_fn;
@@ -208,60 +229,77 @@ __2data_recov_5(int disks, size_t bytes, int faila, int failb,
BUG_ON(good_srcs > 1);
p = blocks[disks-2];
+ p_off = offs[disks-2];
q = blocks[disks-1];
+ q_off = offs[disks-1];
g = blocks[good];
+ g_off = offs[good];
/* Compute syndrome with zero for the missing data pages
* Use the dead data pages as temporary storage for delta p and
* delta q
*/
dp = blocks[faila];
+ dp_off = offs[faila];
dq = blocks[failb];
+ dq_off = offs[failb];
init_async_submit(submit, ASYNC_TX_FENCE, tx, NULL, NULL, scribble);
- tx = async_memcpy(dp, g, 0, 0, bytes, submit);
+ tx = async_memcpy(dp, g, dp_off, g_off, bytes, submit);
init_async_submit(submit, ASYNC_TX_FENCE, tx, NULL, NULL, scribble);
- tx = async_mult(dq, g, raid6_gfexp[good], bytes, submit);
+ tx = async_mult(dq, dq_off, g, g_off,
+ raid6_gfexp[good], bytes, submit);
/* compute P + Pxy */
srcs[0] = dp;
+ src_offs[0] = dp_off;
srcs[1] = p;
+ src_offs[1] = p_off;
init_async_submit(submit, ASYNC_TX_FENCE|ASYNC_TX_XOR_DROP_DST, tx,
NULL, NULL, scribble);
- tx = async_xor(dp, srcs, 0, 2, bytes, submit);
+ tx = async_xor_offs(dp, dp_off, srcs, src_offs, 2, bytes, submit);
/* compute Q + Qxy */
srcs[0] = dq;
+ src_offs[0] = dq_off;
srcs[1] = q;
+ src_offs[1] = q_off;
init_async_submit(submit, ASYNC_TX_FENCE|ASYNC_TX_XOR_DROP_DST, tx,
NULL, NULL, scribble);
- tx = async_xor(dq, srcs, 0, 2, bytes, submit);
+ tx = async_xor_offs(dq, dq_off, srcs, src_offs, 2, bytes, submit);
/* Dx = A*(P+Pxy) + B*(Q+Qxy) */
srcs[0] = dp;
+ src_offs[0] = dp_off;
srcs[1] = dq;
+ src_offs[1] = dq_off;
coef[0] = raid6_gfexi[failb-faila];
coef[1] = raid6_gfinv[raid6_gfexp[faila]^raid6_gfexp[failb]];
init_async_submit(submit, ASYNC_TX_FENCE, tx, NULL, NULL, scribble);
- tx = async_sum_product(dq, srcs, coef, bytes, submit);
+ tx = async_sum_product(dq, dq_off, srcs, src_offs, coef, bytes, submit);
/* Dy = P+Pxy+Dx */
srcs[0] = dp;
+ src_offs[0] = dp_off;
srcs[1] = dq;
+ src_offs[1] = dq_off;
init_async_submit(submit, flags | ASYNC_TX_XOR_DROP_DST, tx, cb_fn,
cb_param, scribble);
- tx = async_xor(dp, srcs, 0, 2, bytes, submit);
+ tx = async_xor_offs(dp, dp_off, srcs, src_offs, 2, bytes, submit);
return tx;
}
static struct dma_async_tx_descriptor *
__2data_recov_n(int disks, size_t bytes, int faila, int failb,
- struct page **blocks, struct async_submit_ctl *submit)
+ struct page **blocks, unsigned int *offs,
+ struct async_submit_ctl *submit)
{
struct dma_async_tx_descriptor *tx = NULL;
struct page *p, *q, *dp, *dq;
+ unsigned int p_off, q_off, dp_off, dq_off;
struct page *srcs[2];
+ unsigned int src_offs[2];
unsigned char coef[2];
enum async_tx_flags flags = submit->flags;
dma_async_tx_callback cb_fn = submit->cb_fn;
@@ -269,56 +307,74 @@ __2data_recov_n(int disks, size_t bytes, int faila, int failb,
void *scribble = submit->scribble;
p = blocks[disks-2];
+ p_off = offs[disks-2];
q = blocks[disks-1];
+ q_off = offs[disks-1];
/* Compute syndrome with zero for the missing data pages
* Use the dead data pages as temporary storage for
* delta p and delta q
*/
dp = blocks[faila];
+ dp_off = offs[faila];
blocks[faila] = NULL;
blocks[disks-2] = dp;
+ offs[disks-2] = dp_off;
dq = blocks[failb];
+ dq_off = offs[failb];
blocks[failb] = NULL;
blocks[disks-1] = dq;
+ offs[disks-1] = dq_off;
init_async_submit(submit, ASYNC_TX_FENCE, tx, NULL, NULL, scribble);
- tx = async_gen_syndrome(blocks, 0, disks, bytes, submit);
+ tx = async_gen_syndrome(blocks, offs, disks, bytes, submit);
/* Restore pointer table */
blocks[faila] = dp;
+ offs[faila] = dp_off;
blocks[failb] = dq;
+ offs[failb] = dq_off;
blocks[disks-2] = p;
+ offs[disks-2] = p_off;
blocks[disks-1] = q;
+ offs[disks-1] = q_off;
/* compute P + Pxy */
srcs[0] = dp;
+ src_offs[0] = dp_off;
srcs[1] = p;
+ src_offs[1] = p_off;
init_async_submit(submit, ASYNC_TX_FENCE|ASYNC_TX_XOR_DROP_DST, tx,
NULL, NULL, scribble);
- tx = async_xor(dp, srcs, 0, 2, bytes, submit);
+ tx = async_xor_offs(dp, dp_off, srcs, src_offs, 2, bytes, submit);
/* compute Q + Qxy */
srcs[0] = dq;
+ src_offs[0] = dq_off;
srcs[1] = q;
+ src_offs[1] = q_off;
init_async_submit(submit, ASYNC_TX_FENCE|ASYNC_TX_XOR_DROP_DST, tx,
NULL, NULL, scribble);
- tx = async_xor(dq, srcs, 0, 2, bytes, submit);
+ tx = async_xor_offs(dq, dq_off, srcs, src_offs, 2, bytes, submit);
/* Dx = A*(P+Pxy) + B*(Q+Qxy) */
srcs[0] = dp;
+ src_offs[0] = dp_off;
srcs[1] = dq;
+ src_offs[1] = dq_off;
coef[0] = raid6_gfexi[failb-faila];
coef[1] = raid6_gfinv[raid6_gfexp[faila]^raid6_gfexp[failb]];
init_async_submit(submit, ASYNC_TX_FENCE, tx, NULL, NULL, scribble);
- tx = async_sum_product(dq, srcs, coef, bytes, submit);
+ tx = async_sum_product(dq, dq_off, srcs, src_offs, coef, bytes, submit);
/* Dy = P+Pxy+Dx */
srcs[0] = dp;
+ src_offs[0] = dp_off;
srcs[1] = dq;
+ src_offs[1] = dq_off;
init_async_submit(submit, flags | ASYNC_TX_XOR_DROP_DST, tx, cb_fn,
cb_param, scribble);
- tx = async_xor(dp, srcs, 0, 2, bytes, submit);
+ tx = async_xor_offs(dp, dp_off, srcs, src_offs, 2, bytes, submit);
return tx;
}
@@ -330,11 +386,13 @@ __2data_recov_n(int disks, size_t bytes, int faila, int failb,
* @faila: first failed drive index
* @failb: second failed drive index
* @blocks: array of source pointers where the last two entries are p and q
+ * @offs: array of offset for pages in blocks
* @submit: submission/completion modifiers
*/
struct dma_async_tx_descriptor *
async_raid6_2data_recov(int disks, size_t bytes, int faila, int failb,
- struct page **blocks, struct async_submit_ctl *submit)
+ struct page **blocks, unsigned int *offs,
+ struct async_submit_ctl *submit)
{
void *scribble = submit->scribble;
int non_zero_srcs, i;
@@ -358,7 +416,7 @@ async_raid6_2data_recov(int disks, size_t bytes, int faila, int failb,
if (blocks[i] == NULL)
ptrs[i] = (void *) raid6_empty_zero_page;
else
- ptrs[i] = page_address(blocks[i]);
+ ptrs[i] = page_address(blocks[i]) + offs[i];
raid6_2data_recov(disks, bytes, faila, failb, ptrs);
@@ -383,16 +441,19 @@ async_raid6_2data_recov(int disks, size_t bytes, int faila, int failb,
* explicitly handle the special case of a 4 disk array with
* both data disks missing.
*/
- return __2data_recov_4(disks, bytes, faila, failb, blocks, submit);
+ return __2data_recov_4(disks, bytes, faila, failb,
+ blocks, offs, submit);
case 3:
/* dma devices do not uniformly understand a single
* source pq operation (in contrast to the synchronous
* case), so explicitly handle the special case of a 5 disk
* array with 2 of 3 data disks missing.
*/
- return __2data_recov_5(disks, bytes, faila, failb, blocks, submit);
+ return __2data_recov_5(disks, bytes, faila, failb,
+ blocks, offs, submit);
default:
- return __2data_recov_n(disks, bytes, faila, failb, blocks, submit);
+ return __2data_recov_n(disks, bytes, faila, failb,
+ blocks, offs, submit);
}
}
EXPORT_SYMBOL_GPL(async_raid6_2data_recov);
@@ -403,14 +464,17 @@ EXPORT_SYMBOL_GPL(async_raid6_2data_recov);
* @bytes: block size
* @faila: failed drive index
* @blocks: array of source pointers where the last two entries are p and q
+ * @offs: array of offset for pages in blocks
* @submit: submission/completion modifiers
*/
struct dma_async_tx_descriptor *
async_raid6_datap_recov(int disks, size_t bytes, int faila,
- struct page **blocks, struct async_submit_ctl *submit)
+ struct page **blocks, unsigned int *offs,
+ struct async_submit_ctl *submit)
{
struct dma_async_tx_descriptor *tx = NULL;
struct page *p, *q, *dq;
+ unsigned int p_off, q_off, dq_off;
u8 coef;
enum async_tx_flags flags = submit->flags;
dma_async_tx_callback cb_fn = submit->cb_fn;
@@ -418,6 +482,7 @@ async_raid6_datap_recov(int disks, size_t bytes, int faila,
void *scribble = submit->scribble;
int good_srcs, good, i;
struct page *srcs[2];
+ unsigned int src_offs[2];
pr_debug("%s: disks: %d len: %zu\n", __func__, disks, bytes);
@@ -434,7 +499,7 @@ async_raid6_datap_recov(int disks, size_t bytes, int faila,
if (blocks[i] == NULL)
ptrs[i] = (void*)raid6_empty_zero_page;
else
- ptrs[i] = page_address(blocks[i]);
+ ptrs[i] = page_address(blocks[i]) + offs[i];
raid6_datap_recov(disks, bytes, faila, ptrs);
@@ -458,55 +523,67 @@ async_raid6_datap_recov(int disks, size_t bytes, int faila,
BUG_ON(good_srcs == 0);
p = blocks[disks-2];
+ p_off = offs[disks-2];
q = blocks[disks-1];
+ q_off = offs[disks-1];
/* Compute syndrome with zero for the missing data page
* Use the dead data page as temporary storage for delta q
*/
dq = blocks[faila];
+ dq_off = offs[faila];
blocks[faila] = NULL;
blocks[disks-1] = dq;
+ offs[disks-1] = dq_off;
/* in the 4-disk case we only need to perform a single source
* multiplication with the one good data block.
*/
if (good_srcs == 1) {
struct page *g = blocks[good];
+ unsigned int g_off = offs[good];
init_async_submit(submit, ASYNC_TX_FENCE, tx, NULL, NULL,
scribble);
- tx = async_memcpy(p, g, 0, 0, bytes, submit);
+ tx = async_memcpy(p, g, p_off, g_off, bytes, submit);
init_async_submit(submit, ASYNC_TX_FENCE, tx, NULL, NULL,
scribble);
- tx = async_mult(dq, g, raid6_gfexp[good], bytes, submit);
+ tx = async_mult(dq, dq_off, g, g_off,
+ raid6_gfexp[good], bytes, submit);
} else {
init_async_submit(submit, ASYNC_TX_FENCE, tx, NULL, NULL,
scribble);
- tx = async_gen_syndrome(blocks, 0, disks, bytes, submit);
+ tx = async_gen_syndrome(blocks, offs, disks, bytes, submit);
}
/* Restore pointer table */
blocks[faila] = dq;
+ offs[faila] = dq_off;
blocks[disks-1] = q;
+ offs[disks-1] = q_off;
/* calculate g^{-faila} */
coef = raid6_gfinv[raid6_gfexp[faila]];
srcs[0] = dq;
+ src_offs[0] = dq_off;
srcs[1] = q;
+ src_offs[1] = q_off;
init_async_submit(submit, ASYNC_TX_FENCE|ASYNC_TX_XOR_DROP_DST, tx,
NULL, NULL, scribble);
- tx = async_xor(dq, srcs, 0, 2, bytes, submit);
+ tx = async_xor_offs(dq, dq_off, srcs, src_offs, 2, bytes, submit);
init_async_submit(submit, ASYNC_TX_FENCE, tx, NULL, NULL, scribble);
- tx = async_mult(dq, dq, coef, bytes, submit);
+ tx = async_mult(dq, dq_off, dq, dq_off, coef, bytes, submit);
srcs[0] = p;
+ src_offs[0] = p_off;
srcs[1] = dq;
+ src_offs[1] = dq_off;
init_async_submit(submit, flags | ASYNC_TX_XOR_DROP_DST, tx, cb_fn,
cb_param, scribble);
- tx = async_xor(p, srcs, 0, 2, bytes, submit);
+ tx = async_xor_offs(p, p_off, srcs, src_offs, 2, bytes, submit);
return tx;
}
diff --git a/crypto/async_tx/async_xor.c b/crypto/async_tx/async_xor.c
index 4e5eebe52e6a..a057ecb1288d 100644
--- a/crypto/async_tx/async_xor.c
+++ b/crypto/async_tx/async_xor.c
@@ -97,7 +97,8 @@ do_async_xor(struct dma_chan *chan, struct dmaengine_unmap_data *unmap,
}
static void
-do_sync_xor(struct page *dest, struct page **src_list, unsigned int offset,
+do_sync_xor_offs(struct page *dest, unsigned int offset,
+ struct page **src_list, unsigned int *src_offs,
int src_cnt, size_t len, struct async_submit_ctl *submit)
{
int i;
@@ -114,7 +115,8 @@ do_sync_xor(struct page *dest, struct page **src_list, unsigned int offset,
/* convert to buffer pointers */
for (i = 0; i < src_cnt; i++)
if (src_list[i])
- srcs[xor_src_cnt++] = page_address(src_list[i]) + offset;
+ srcs[xor_src_cnt++] = page_address(src_list[i]) +
+ (src_offs ? src_offs[i] : offset);
src_cnt = xor_src_cnt;
/* set destination address */
dest_buf = page_address(dest) + offset;
@@ -135,11 +137,31 @@ do_sync_xor(struct page *dest, struct page **src_list, unsigned int offset,
async_tx_sync_epilog(submit);
}
+static inline bool
+dma_xor_aligned_offsets(struct dma_device *device, unsigned int offset,
+ unsigned int *src_offs, int src_cnt, int len)
+{
+ int i;
+
+ if (!is_dma_xor_aligned(device, offset, 0, len))
+ return false;
+
+ if (!src_offs)
+ return true;
+
+ for (i = 0; i < src_cnt; i++) {
+ if (!is_dma_xor_aligned(device, src_offs[i], 0, len))
+ return false;
+ }
+ return true;
+}
+
/**
- * async_xor - attempt to xor a set of blocks with a dma engine.
+ * async_xor_offs - attempt to xor a set of blocks with a dma engine.
* @dest: destination page
+ * @offset: dst offset to start transaction
* @src_list: array of source pages
- * @offset: common src/dst offset to start transaction
+ * @src_offs: array of source pages offset, NULL means common src/dst offset
* @src_cnt: number of source pages
* @len: length in bytes
* @submit: submission / completion modifiers
@@ -157,8 +179,9 @@ do_sync_xor(struct page *dest, struct page **src_list, unsigned int offset,
* is not specified.
*/
struct dma_async_tx_descriptor *
-async_xor(struct page *dest, struct page **src_list, unsigned int offset,
- int src_cnt, size_t len, struct async_submit_ctl *submit)
+async_xor_offs(struct page *dest, unsigned int offset,
+ struct page **src_list, unsigned int *src_offs,
+ int src_cnt, size_t len, struct async_submit_ctl *submit)
{
struct dma_chan *chan = async_tx_find_channel(submit, DMA_XOR,
&dest, 1, src_list,
@@ -171,7 +194,8 @@ async_xor(struct page *dest, struct page **src_list, unsigned int offset,
if (device)
unmap = dmaengine_get_unmap_data(device->dev, src_cnt+1, GFP_NOWAIT);
- if (unmap && is_dma_xor_aligned(device, offset, 0, len)) {
+ if (unmap && dma_xor_aligned_offsets(device, offset,
+ src_offs, src_cnt, len)) {
struct dma_async_tx_descriptor *tx;
int i, j;
@@ -184,7 +208,8 @@ async_xor(struct page *dest, struct page **src_list, unsigned int offset,
continue;
unmap->to_cnt++;
unmap->addr[j++] = dma_map_page(device->dev, src_list[i],
- offset, len, DMA_TO_DEVICE);
+ src_offs ? src_offs[i] : offset,
+ len, DMA_TO_DEVICE);
}
/* map it bidirectional as it may be re-used as a source */
@@ -213,11 +238,42 @@ async_xor(struct page *dest, struct page **src_list, unsigned int offset,
/* wait for any prerequisite operations */
async_tx_quiesce(&submit->depend_tx);
- do_sync_xor(dest, src_list, offset, src_cnt, len, submit);
+ do_sync_xor_offs(dest, offset, src_list, src_offs,
+ src_cnt, len, submit);
return NULL;
}
}
+EXPORT_SYMBOL_GPL(async_xor_offs);
+
+/**
+ * async_xor - attempt to xor a set of blocks with a dma engine.
+ * @dest: destination page
+ * @src_list: array of source pages
+ * @offset: common src/dst offset to start transaction
+ * @src_cnt: number of source pages
+ * @len: length in bytes
+ * @submit: submission / completion modifiers
+ *
+ * honored flags: ASYNC_TX_ACK, ASYNC_TX_XOR_ZERO_DST, ASYNC_TX_XOR_DROP_DST
+ *
+ * xor_blocks always uses the dest as a source so the
+ * ASYNC_TX_XOR_ZERO_DST flag must be set to not include dest data in
+ * the calculation. The assumption with dma eninges is that they only
+ * use the destination buffer as a source when it is explicity specified
+ * in the source list.
+ *
+ * src_list note: if the dest is also a source it must be at index zero.
+ * The contents of this array will be overwritten if a scribble region
+ * is not specified.
+ */
+struct dma_async_tx_descriptor *
+async_xor(struct page *dest, struct page **src_list, unsigned int offset,
+ int src_cnt, size_t len, struct async_submit_ctl *submit)
+{
+ return async_xor_offs(dest, offset, src_list, NULL,
+ src_cnt, len, submit);
+}
EXPORT_SYMBOL_GPL(async_xor);
static int page_is_zero(struct page *p, unsigned int offset, size_t len)
@@ -237,10 +293,11 @@ xor_val_chan(struct async_submit_ctl *submit, struct page *dest,
}
/**
- * async_xor_val - attempt a xor parity check with a dma engine.
+ * async_xor_val_offs - attempt a xor parity check with a dma engine.
* @dest: destination page used if the xor is performed synchronously
+ * @offset: des offset in pages to start transaction
* @src_list: array of source pages
- * @offset: offset in pages to start transaction
+ * @src_offs: array of source pages offset, NULL means common src/det offset
* @src_cnt: number of source pages
* @len: length in bytes
* @result: 0 if sum == 0 else non-zero
@@ -253,9 +310,10 @@ xor_val_chan(struct async_submit_ctl *submit, struct page *dest,
* is not specified.
*/
struct dma_async_tx_descriptor *
-async_xor_val(struct page *dest, struct page **src_list, unsigned int offset,
- int src_cnt, size_t len, enum sum_check_flags *result,
- struct async_submit_ctl *submit)
+async_xor_val_offs(struct page *dest, unsigned int offset,
+ struct page **src_list, unsigned int *src_offs,
+ int src_cnt, size_t len, enum sum_check_flags *result,
+ struct async_submit_ctl *submit)
{
struct dma_chan *chan = xor_val_chan(submit, dest, src_list, src_cnt, len);
struct dma_device *device = chan ? chan->device : NULL;
@@ -268,7 +326,7 @@ async_xor_val(struct page *dest, struct page **src_list, unsigned int offset,
unmap = dmaengine_get_unmap_data(device->dev, src_cnt, GFP_NOWAIT);
if (unmap && src_cnt <= device->max_xor &&
- is_dma_xor_aligned(device, offset, 0, len)) {
+ dma_xor_aligned_offsets(device, offset, src_offs, src_cnt, len)) {
unsigned long dma_prep_flags = 0;
int i;
@@ -281,7 +339,8 @@ async_xor_val(struct page *dest, struct page **src_list, unsigned int offset,
for (i = 0; i < src_cnt; i++) {
unmap->addr[i] = dma_map_page(device->dev, src_list[i],
- offset, len, DMA_TO_DEVICE);
+ src_offs ? src_offs[i] : offset,
+ len, DMA_TO_DEVICE);
unmap->to_cnt++;
}
unmap->len = len;
@@ -312,7 +371,8 @@ async_xor_val(struct page *dest, struct page **src_list, unsigned int offset,
submit->flags |= ASYNC_TX_XOR_DROP_DST;
submit->flags &= ~ASYNC_TX_ACK;
- tx = async_xor(dest, src_list, offset, src_cnt, len, submit);
+ tx = async_xor_offs(dest, offset, src_list, src_offs,
+ src_cnt, len, submit);
async_tx_quiesce(&tx);
@@ -325,6 +385,32 @@ async_xor_val(struct page *dest, struct page **src_list, unsigned int offset,
return tx;
}
+EXPORT_SYMBOL_GPL(async_xor_val_offs);
+
+/**
+ * async_xor_val - attempt a xor parity check with a dma engine.
+ * @dest: destination page used if the xor is performed synchronously
+ * @src_list: array of source pages
+ * @offset: offset in pages to start transaction
+ * @src_cnt: number of source pages
+ * @len: length in bytes
+ * @result: 0 if sum == 0 else non-zero
+ * @submit: submission / completion modifiers
+ *
+ * honored flags: ASYNC_TX_ACK
+ *
+ * src_list note: if the dest is also a source it must be at index zero.
+ * The contents of this array will be overwritten if a scribble region
+ * is not specified.
+ */
+struct dma_async_tx_descriptor *
+async_xor_val(struct page *dest, struct page **src_list, unsigned int offset,
+ int src_cnt, size_t len, enum sum_check_flags *result,
+ struct async_submit_ctl *submit)
+{
+ return async_xor_val_offs(dest, offset, src_list, NULL, src_cnt,
+ len, result, submit);
+}
EXPORT_SYMBOL_GPL(async_xor_val);
MODULE_AUTHOR("Intel Corporation");
diff --git a/crypto/async_tx/raid6test.c b/crypto/async_tx/raid6test.c
index 14e73dcd7475..66db82e5a3b1 100644
--- a/crypto/async_tx/raid6test.c
+++ b/crypto/async_tx/raid6test.c
@@ -18,6 +18,7 @@
#define NDISKS 64 /* Including P and Q */
static struct page *dataptrs[NDISKS];
+unsigned int dataoffs[NDISKS];
static addr_conv_t addr_conv[NDISKS];
static struct page *data[NDISKS+3];
static struct page *spare;
@@ -38,6 +39,7 @@ static void makedata(int disks)
for (i = 0; i < disks; i++) {
prandom_bytes(page_address(data[i]), PAGE_SIZE);
dataptrs[i] = data[i];
+ dataoffs[i] = 0;
}
}
@@ -52,7 +54,8 @@ static char disk_type(int d, int disks)
}
/* Recover two failed blocks. */
-static void raid6_dual_recov(int disks, size_t bytes, int faila, int failb, struct page **ptrs)
+static void raid6_dual_recov(int disks, size_t bytes, int faila, int failb,
+ struct page **ptrs, unsigned int *offs)
{
struct async_submit_ctl submit;
struct completion cmp;
@@ -66,7 +69,8 @@ static void raid6_dual_recov(int disks, size_t bytes, int faila, int failb, stru
if (faila == disks-2) {
/* P+Q failure. Just rebuild the syndrome. */
init_async_submit(&submit, 0, NULL, NULL, NULL, addr_conv);
- tx = async_gen_syndrome(ptrs, 0, disks, bytes, &submit);
+ tx = async_gen_syndrome(ptrs, offs,
+ disks, bytes, &submit);
} else {
struct page *blocks[NDISKS];
struct page *dest;
@@ -89,22 +93,26 @@ static void raid6_dual_recov(int disks, size_t bytes, int faila, int failb, stru
tx = async_xor(dest, blocks, 0, count, bytes, &submit);
init_async_submit(&submit, 0, tx, NULL, NULL, addr_conv);
- tx = async_gen_syndrome(ptrs, 0, disks, bytes, &submit);
+ tx = async_gen_syndrome(ptrs, offs,
+ disks, bytes, &submit);
}
} else {
if (failb == disks-2) {
/* data+P failure. */
init_async_submit(&submit, 0, NULL, NULL, NULL, addr_conv);
- tx = async_raid6_datap_recov(disks, bytes, faila, ptrs, &submit);
+ tx = async_raid6_datap_recov(disks, bytes,
+ faila, ptrs, offs, &submit);
} else {
/* data+data failure. */
init_async_submit(&submit, 0, NULL, NULL, NULL, addr_conv);
- tx = async_raid6_2data_recov(disks, bytes, faila, failb, ptrs, &submit);
+ tx = async_raid6_2data_recov(disks, bytes,
+ faila, failb, ptrs, offs, &submit);
}
}
init_completion(&cmp);
init_async_submit(&submit, ASYNC_TX_ACK, tx, callback, &cmp, addr_conv);
- tx = async_syndrome_val(ptrs, 0, disks, bytes, &result, spare, &submit);
+ tx = async_syndrome_val(ptrs, offs,
+ disks, bytes, &result, spare, 0, &submit);
async_tx_issue_pending(tx);
if (wait_for_completion_timeout(&cmp, msecs_to_jiffies(3000)) == 0)
@@ -126,7 +134,7 @@ static int test_disks(int i, int j, int disks)
dataptrs[i] = recovi;
dataptrs[j] = recovj;
- raid6_dual_recov(disks, PAGE_SIZE, i, j, dataptrs);
+ raid6_dual_recov(disks, PAGE_SIZE, i, j, dataptrs, dataoffs);
erra = memcmp(page_address(data[i]), page_address(recovi), PAGE_SIZE);
errb = memcmp(page_address(data[j]), page_address(recovj), PAGE_SIZE);
@@ -162,7 +170,7 @@ static int test(int disks, int *tests)
/* Generate assumed good syndrome */
init_completion(&cmp);
init_async_submit(&submit, ASYNC_TX_ACK, NULL, callback, &cmp, addr_conv);
- tx = async_gen_syndrome(dataptrs, 0, disks, PAGE_SIZE, &submit);
+ tx = async_gen_syndrome(dataptrs, dataoffs, disks, PAGE_SIZE, &submit);
async_tx_issue_pending(tx);
if (wait_for_completion_timeout(&cmp, msecs_to_jiffies(3000)) == 0) {
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-11 23:48:27 +0000