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iscsi: don't store paddr in pdu buffers

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The physical addresses in iSCSI are completely unused
as iSCSI does not perform any DMA on its own.

Change-Id: I350037b708a9f36f423e6ca6f7c822d8b6b95116
Signed-off-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com>
Reviewed-on: https://review.gerrithub.io/c/443482
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Paul Luse <paul.e.luse@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
This commit is contained in:
Darek Stojaczyk 2019-02-05 22:31:38 +01:00 committed by Jim Harris
parent 1dc9e7024b
commit 473d5a8f14
1 changed files with 0 additions and 10 deletions
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10
lib/iscsi/iscsi_subsystem.c
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@ -130,21 +130,11 @@ spdk_mobj_ctor(struct spdk_mempool *mp, __attribute__((unused)) void *arg,
void *_m, __attribute__((unused)) unsigned i)
{
struct spdk_mobj *m = _m;
uint64_t *phys_addr;
ptrdiff_t off;
m->mp = mp;
m->buf = (uint8_t *)m + sizeof(struct spdk_mobj);
m->buf = (void *)((unsigned long)((uint8_t *)m->buf + ISCSI_DATA_BUFFER_ALIGNMENT) &
~ISCSI_DATA_BUFFER_MASK);
off = (uint64_t)(uint8_t *)m->buf - (uint64_t)(uint8_t *)m;
/*
* we store the physical address in a 64bit unsigned integer
* right before the 512B aligned buffer area.
*/
phys_addr = (uint64_t *)m->buf - 1;
*phys_addr = spdk_vtophys(m, NULL) + off;
}
#define NUM_PDU_PER_CONNECTION(iscsi) (2 * (iscsi->MaxQueueDepth + MAX_LARGE_DATAIN_PER_CONNECTION + 8))