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user_sdma_send_pkts(): handle page sizes correctly

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This commit is contained in:
Balazs Gerofi
2017-08-17 21:03:52 +09:00
parent c1d2db6a73
commit c43654d69b
1 changed files with 54 additions and 25 deletions
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79
kernel/user_sdma.c
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@ -1115,8 +1115,8 @@ retry:
}
else {
int i;
kprintf("%s: cache empty, allocating ...\n", __FUNCTION__);
for (i = 0; i < 100; ++i) {
kprintf("%s: cache empty, allocating ...\n", __FUNCTION__);
for (i = 0; i < 50; ++i) {
req = kmalloc(sizeof(struct user_sdma_txreq), GFP_KERNEL);
if (!req) {
kprintf("%s: ERROR: allocating txreq\n", __FUNCTION__);
@ -1140,7 +1140,7 @@ void txreq_cache_free(struct user_sdma_txreq *req)
ihk_mc_spinlock_unlock_noirq(&txreq_cache_lock);
}
//#undef PROFILE_ENABLE
#undef PROFILE_ENABLE
static int user_sdma_send_pkts(struct user_sdma_request *req, unsigned maxpkts)
{
@ -1149,6 +1149,9 @@ static int user_sdma_send_pkts(struct user_sdma_request *req, unsigned maxpkts)
struct user_sdma_txreq *tx = NULL;
struct hfi1_user_sdma_pkt_q *pq = NULL;
struct user_sdma_iovec *iovec = NULL;
unsigned long base_phys = 0;
unsigned long base_pgsize = 0;
void *base_virt = NULL;
TP("+");
hfi1_cdbg(AIOWRITE, "+");
@ -1179,7 +1182,6 @@ static int user_sdma_send_pkts(struct user_sdma_request *req, unsigned maxpkts)
while (npkts < maxpkts) {
u32 datalen = 0, queued = 0, data_sent = 0;
unsigned long base_phys;
u64 iov_offset = 0;
#ifdef PROFILE_ENABLE
@ -1343,38 +1345,65 @@ static int user_sdma_send_pkts(struct user_sdma_request *req, unsigned maxpkts)
(req->sent + data_sent) < req->data_len) {
unsigned pageidx, len;
unsigned long base, offset;
const void *virt;
unsigned long paddr_base;
void *virt;
pte_t *ptep;
base = (unsigned long)iovec->iov.iov_base;
offset = offset_in_page(base + iovec->offset +
iov_offset);
virt = base + iovec->offset + iov_offset;
pageidx = (((iovec->offset + iov_offset +
base) - (base & PAGE_MASK)) >> PAGE_SHIFT);
len = offset + req->info.fragsize > PAGE_SIZE ?
PAGE_SIZE - offset : req->info.fragsize;
len = min((datalen - queued), len);
SDMA_DBG("%s: dl: %d, qd: %d, len: %d\n",
__FUNCTION__, datalen, queued, len);
//if (iov_offset == 0 || iovec->offset == 0) {
if (ihk_mc_pt_virt_to_phys(
cpu_local_var(current)->vm->address_space->page_table,
virt, &paddr_base) < 0) {
/* TODO: shall we make this function fail? *
* Handle this error. */
kprintf("%s: ERROR: virt_to_phys failed - virt = 0x%lx\n",
/*
* Resolve base_phys if vaddr is out of previous page.
*/
if (virt < base_virt ||
virt > (base_virt + base_pgsize)) {
ptep = ihk_mc_pt_lookup_pte(
cpu_local_var(current)->vm->address_space->page_table,
virt, 0, 0, &base_pgsize, 0);
if (!ptep || !pte_is_present(ptep)) {
kprintf("%s: ERROR: no valid PTE for 0x%lx\n",
__FUNCTION__, virt);
return -EFAULT;
}
//}
base_phys = pte_get_phys(ptep);
base_virt = (void *)((unsigned long)virt & ~(base_pgsize - 1));
SDMA_DBG("%s: base_virt: 0x%lx, base_phys: 0x%lx, "
"base_pgsize: %lu\n",
__FUNCTION__,
base_virt, base_phys, base_pgsize);
}
#ifdef __HFI1_ORIG__
pageidx = (((iovec->offset + iov_offset +
base) - (base & PAGE_MASK)) >> PAGE_SHIFT);
offset = offset_in_page(base + iovec->offset +
iov_offset);
len = offset + req->info.fragsize > PAGE_SIZE ?
PAGE_SIZE - offset : req->info.fragsize;
#else
/*
* This doesn't appear to work. Perhaps the card
* doesn't like it if the physical range in an SDMA
* descriptor crosses page boundaries??
*/
len = virt + req->info.fragsize >
base_virt + base_pgsize ?
base_virt + base_pgsize - virt : req->info.fragsize;
offset = offset_in_page(base + iovec->offset +
iov_offset);
len = offset + req->info.fragsize > PAGE_SIZE ?
PAGE_SIZE - offset : req->info.fragsize;
#endif
len = min((datalen - queued), len);
SDMA_DBG("%s: dl: %d, qd: %d, len: %d\n",
__FUNCTION__, datalen, queued, len);
ret = sdma_txadd_page(pq->dd, &tx->txreq,
#ifdef __HFI1_ORIG__
iovec->pages[pageidx], offset,
#else
paddr_base + iov_offset + iovec->offset,
base_phys + (virt - base_virt),
#endif
len);
if (ret) {