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Merge branch 'md-next' of https://git.kernel.org/pub/scm/linux/kernel…
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…/git/song/md into for-5.10/drivers

Pull MD updates from Song.

* 'md-next' of https://git.kernel.org/pub/scm/linux/kernel/git/song/md:
  md/raid10: improve discard request for far layout
  md/raid10: improve raid10 discard request
  md/raid10: pull codes that wait for blocked dev into one function
  md/raid10: extend r10bio devs to raid disks
  md: add md_submit_discard_bio() for submitting discard bio
  md: Simplify code with existing definition RESYNC_SECTORS in raid10.c
  md/raid5: reallocate page array after setting new stripe_size
  md/raid5: resize stripe_head when reshape array
  md/raid5: let multiple devices of stripe_head share page
  md/raid6: let async recovery function support different page offset
  md/raid6: let syndrome computor support different page offset
  md/raid5: convert to new xor compution interface
  md/raid5: add new xor function to support different page offset
  md/raid5: make async_copy_data() to support different page offset
  md/raid5: add a new member of offset into r5dev
  md: only calculate blocksize once and use i_blocksize()
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Jens Axboe committed Sep 25, 2020
2 parents 0905053 + d3ee2d8 commit 163090c
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Showing 13 changed files with 967 additions and 213 deletions.
72 changes: 48 additions & 24 deletions crypto/async_tx/async_pq.c
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Original file line number Diff line number Diff line change
Expand Up @@ -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;
Expand All @@ -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)
Expand All @@ -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
Expand All @@ -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;
Expand All @@ -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];
Expand All @@ -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++;
Expand All @@ -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;
Expand All @@ -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;
Expand All @@ -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;
}
Expand All @@ -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',
Expand All @@ -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;
Expand All @@ -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;
Expand All @@ -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++;
Expand All @@ -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++;
Expand All @@ -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++;
Expand All @@ -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;
Expand All @@ -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;
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