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hello_world: If supported, use CMB WDS buffer

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If the NVMe controller to be tested supports a CMB with the WDS
feature then we use that for the write phase of hello_world.

Change-Id: Ide6ee1005a892ca977bd32a974cd644256e95c8a
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
Signed-off-by: Stephen Bates <sbates@raithlin.com>
Reviewed-on: https://review.gerrithub.io/397039
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
This commit is contained in:
Daniel Verkamp 2017-04-24 10:47:25 -07:00 committed by Jim Harris
parent 3839639759
commit 8f3d0a6413
1 changed files with 21 additions and 2 deletions
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19
examples/nvme/hello_world/hello_world.c
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@ -93,6 +93,7 @@ register_ns(struct spdk_nvme_ctrlr *ctrlr, struct spdk_nvme_ns *ns)
struct hello_world_sequence {
struct ns_entry *ns_entry;
char *buf;
unsigned using_cmb_io;
int is_completed;
};
@ -124,7 +125,11 @@ write_complete(void *arg, const struct spdk_nvme_cpl *completion)
* the write I/O and allocate a new zeroed buffer for reading
* the data back from the NVMe namespace.
*/
if (sequence->using_cmb_io) {
spdk_nvme_ctrlr_free_cmb_io_buffer(ns_entry->ctrlr, sequence->buf, 0x1000);
} else {
spdk_dma_free(sequence->buf);
}
sequence->buf = spdk_dma_zmalloc(0x1000, 0x1000, NULL);
rc = spdk_nvme_ns_cmd_read(ns_entry->ns, ns_entry->qpair, sequence->buf,
@ -169,7 +174,21 @@ hello_world(void)
* will be pinned, which is required for data buffers used for SPDK NVMe
* I/O operations.
*/
sequence.using_cmb_io = 1;
sequence.buf = spdk_nvme_ctrlr_alloc_cmb_io_buffer(ns_entry->ctrlr, 0x1000);
if (sequence.buf == NULL) {
sequence.using_cmb_io = 0;
sequence.buf = spdk_dma_zmalloc(0x1000, 0x1000, NULL);
}
if (sequence.buf == NULL) {
printf("ERROR: write buffer allocation failed\n");
return;
}
if (sequence.using_cmb_io) {
printf("INFO: using controller memory buffer for IO\n");
} else {
printf("INFO: using host memory buffer for IO\n");
}
sequence.is_completed = 0;
sequence.ns_entry = ns_entry;