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HFI1: map completion queues

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This commit is contained in:
Balazs Gerofi
2017-08-10 15:48:34 +09:00
parent 076e6b9b12
commit 37866e61ab
1 changed files with 53 additions and 0 deletions
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53
kernel/user_sdma.c
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@ -631,6 +631,59 @@ int hfi1_user_sdma_process_request(void *private_data, struct iovec *iovec,
(phys - dd->chip_rcv_array_count * 8),
dd->chip_rcv_array_count * 8);
}
/*
* Map in cq->comps, allocated dynamically by
* vmalloc_user() in Linux.
*/
{
void *virt;
pte_t *ptep;
unsigned long phys;
size_t pgsize;
unsigned long len = ((sizeof(*cq->comps) * cq->nentries)
+ PAGE_SIZE - 1) & PAGE_MASK;
struct process_vm *vm = cpu_local_var(current)->vm;
enum ihk_mc_pt_attribute attr = PTATTR_WRITABLE;
ihk_mc_spinlock_lock_noirq(&vm->page_table_lock);
/* Check if mapping exists already and map if not */
for (virt = (void *)cq->comps; virt < (void *)cq->comps + len;
virt += PAGE_SIZE) {
ptep = ihk_mc_pt_lookup_pte(vm->address_space->page_table,
virt, 0, &phys, &pgsize, 0);
if (ptep && pte_is_present(*ptep)) {
goto cq_map_unlock;
}
ptep = ihk_mc_pt_lookup_pte(ihk_mc_get_linux_kernel_pgt(),
virt, 0, &phys, &pgsize, 0);
if (!ptep || !pte_is_present(*ptep)) {
/* TODO: shall we make this function fail? */
kprintf("%s: ERROR: mapping cq, Linux mapping doesn't exist\n",
__FUNCTION__);
goto cq_map_unlock;
}
if (ihk_mc_pt_set_page(vm->address_space->page_table,
virt, phys, attr) < 0) {
/* TODO: shall we make this function fail? */
kprintf("%s: ERROR: mapping cq: 0x%lx -> 0x%lx\n",
__FUNCTION__, virt, phys);
goto cq_map_unlock;
}
kprintf("%s: cq: 0x%lx -> 0x%lx mapped\n",
__FUNCTION__,
virt, phys);
}
cq_map_unlock:
ihk_mc_spinlock_unlock_noirq(&vm->page_table_lock);
/* TODO: unmap these at close() time */
}
#endif // __HFI1_ORIG__
hfi1_cdbg(AIOWRITE, "+");