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bdev/nvme: Add function to allocate bdev/nvme device.

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Change-Id: I246d6427e8adfb53f041776eff6d547a6f9604a6
Signed-off-by: Cunyin Chang <cunyin.chang@intel.com>
This commit is contained in:
Cunyin Chang 2017-01-25 09:04:14 +08:00 committed by Jim Harris
parent fd63bcdca8
commit 6c067d0e9f
1 changed files with 25 additions and 12 deletions
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35
lib/bdev/nvme/blockdev_nvme.c
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@ -77,6 +77,7 @@ struct nvme_blockdev {
struct spdk_nvme_ctrlr *ctrlr;
struct nvme_device *dev;
struct spdk_nvme_ns *ns;
bool allocated;
};
struct nvme_io_channel {
@ -111,7 +112,6 @@ struct nvme_probe_ctx {
};
static struct nvme_blockdev g_blockdev[NVME_MAX_BLOCKDEVS];
static int g_blockdev_index_max = 0;
static int nvme_controller_index = 0;
static int num_controllers = -1;
static int g_reset_controller_on_timeout = 0;
@ -566,7 +566,7 @@ spdk_bdev_nvme_create(struct spdk_nvme_transport_id *trid,
const char **names, size_t *count)
{
struct nvme_probe_ctx probe_ctx;
int prev_index_max, i;
int i;
size_t j;
if (spdk_pci_addr_parse(&probe_ctx.whitelist[0], trid->traddr) < 0) {
@ -579,20 +579,21 @@ spdk_bdev_nvme_create(struct spdk_nvme_transport_id *trid,
return -1;
}
prev_index_max = g_blockdev_index_max;
if (spdk_nvme_probe(trid, &probe_ctx, probe_cb, attach_cb, NULL)) {
return -1;
}
assert((g_blockdev_index_max - prev_index_max) <= (int)*count);
/*
* Report the new bdevs that were created in this call.
* There can be more than one bdev per NVMe controller since one bdev is created per namespace.
*/
for (i = prev_index_max, j = 0; i < g_blockdev_index_max; i++, j++) {
for (j = 0, i = 0; i < NVME_MAX_BLOCKDEVS; i++) {
if (g_blockdev[i].allocated) {
if (spdk_pci_addr_compare(&probe_ctx.whitelist[0], &g_blockdev[i].dev->pci_addr) == 0) {
names[j] = g_blockdev[i].disk.name;
j++;
}
}
}
*count = j;
@ -685,6 +686,20 @@ nvme_library_fini(void)
}
}
static struct nvme_blockdev *
allocate_nvme_blockdev(void)
{
int i;
for (i = 0; i < NVME_MAX_BLOCKDEVS; i++) {
if (g_blockdev[i].allocated == false) {
g_blockdev[i].allocated = true;
return &g_blockdev[i];
}
}
return NULL;
}
static void
nvme_ctrlr_initialize_blockdevs(struct nvme_device *nvme_dev, int ctrlr_id)
{
@ -705,11 +720,11 @@ nvme_ctrlr_initialize_blockdevs(struct nvme_device *nvme_dev, int ctrlr_id)
continue;
}
if (g_blockdev_index_max >= NVME_MAX_BLOCKDEVS) {
bdev = allocate_nvme_blockdev();
if (bdev == NULL) {
return;
}
bdev = &g_blockdev[g_blockdev_index_max];
bdev->ctrlr = ctrlr;
bdev->dev = nvme_dev;
bdev->ns = ns;
@ -739,8 +754,6 @@ nvme_ctrlr_initialize_blockdevs(struct nvme_device *nvme_dev, int ctrlr_id)
bdev->disk.ctxt = bdev;
bdev->disk.fn_table = &nvmelib_fn_table;
spdk_bdev_register(&bdev->disk);
g_blockdev_index_max++;
}
}