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block/nvme: Define INDEX macros to ease code review 

Use definitions instead of '0' or '1' indexes. Also this will
be useful when using multi-queues later.

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20200821195359.1285345-5-philmd@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Philippe Mathieu-Daudé 2020-08-21 21:53:48 +02:00 committed by Kevin Wolf
parent 0ea45f76eb
commit 73159e52e6
1 changed files with 19 additions and 14 deletions
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33
block/nvme.c
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@ -103,6 +103,9 @@ typedef volatile struct {
QEMU_BUILD_BUG_ON(offsetof(NVMeRegs, doorbells) != 0x1000);
#define INDEX_ADMIN 0
#define INDEX_IO(n) (1 + n)
struct BDRVNVMeState {
AioContext *aio_context;
QEMUVFIOState *vfio;
@ -531,7 +534,7 @@ static void nvme_identify(BlockDriverState *bs, int namespace, Error **errp)
}
cmd.dptr.prp1 = cpu_to_le64(iova);
if (nvme_cmd_sync(bs, s->queues[0], &cmd)) {
if (nvme_cmd_sync(bs, s->queues[INDEX_ADMIN], &cmd)) {
error_setg(errp, "Failed to identify controller");
goto out;
}
@ -555,7 +558,7 @@ static void nvme_identify(BlockDriverState *bs, int namespace, Error **errp)
cmd.cdw10 = 0;
cmd.nsid = cpu_to_le32(namespace);
if (nvme_cmd_sync(bs, s->queues[0], &cmd)) {
if (nvme_cmd_sync(bs, s->queues[INDEX_ADMIN], &cmd)) {
error_setg(errp, "Failed to identify namespace");
goto out;
}
@ -644,7 +647,7 @@ static bool nvme_add_io_queue(BlockDriverState *bs, Error **errp)
.cdw10 = cpu_to_le32(((queue_size - 1) << 16) | (n & 0xFFFF)),
.cdw11 = cpu_to_le32(0x3),
};
if (nvme_cmd_sync(bs, s->queues[0], &cmd)) {
if (nvme_cmd_sync(bs, s->queues[INDEX_ADMIN], &cmd)) {
error_setg(errp, "Failed to create io queue [%d]", n);
nvme_free_queue_pair(q);
return false;
@ -655,7 +658,7 @@ static bool nvme_add_io_queue(BlockDriverState *bs, Error **errp)
.cdw10 = cpu_to_le32(((queue_size - 1) << 16) | (n & 0xFFFF)),
.cdw11 = cpu_to_le32(0x1 | (n << 16)),
};
if (nvme_cmd_sync(bs, s->queues[0], &cmd)) {
if (nvme_cmd_sync(bs, s->queues[INDEX_ADMIN], &cmd)) {
error_setg(errp, "Failed to create io queue [%d]", n);
nvme_free_queue_pair(q);
return false;
@ -739,16 +742,18 @@ static int nvme_init(BlockDriverState *bs, const char *device, int namespace,
/* Set up admin queue. */
s->queues = g_new(NVMeQueuePair *, 1);
s->queues[0] = nvme_create_queue_pair(bs, 0, NVME_QUEUE_SIZE, errp);
if (!s->queues[0]) {
s->queues[INDEX_ADMIN] = nvme_create_queue_pair(bs, 0,
NVME_QUEUE_SIZE,
errp);
if (!s->queues[INDEX_ADMIN]) {
ret = -EINVAL;
goto out;
}
s->nr_queues = 1;
QEMU_BUILD_BUG_ON(NVME_QUEUE_SIZE & 0xF000);
s->regs->aqa = cpu_to_le32((NVME_QUEUE_SIZE << 16) | NVME_QUEUE_SIZE);
s->regs->asq = cpu_to_le64(s->queues[0]->sq.iova);
s->regs->acq = cpu_to_le64(s->queues[0]->cq.iova);
s->regs->asq = cpu_to_le64(s->queues[INDEX_ADMIN]->sq.iova);
s->regs->acq = cpu_to_le64(s->queues[INDEX_ADMIN]->cq.iova);
/* After setting up all control registers we can enable device now. */
s->regs->cc = cpu_to_le32((ctz32(NVME_CQ_ENTRY_BYTES) << 20) |
@ -839,7 +844,7 @@ static int nvme_enable_disable_write_cache(BlockDriverState *bs, bool enable,
.cdw11 = cpu_to_le32(enable ? 0x01 : 0x00),
};
ret = nvme_cmd_sync(bs, s->queues[0], &cmd);
ret = nvme_cmd_sync(bs, s->queues[INDEX_ADMIN], &cmd);
if (ret) {
error_setg(errp, "Failed to configure NVMe write cache");
}
@ -1056,7 +1061,7 @@ static coroutine_fn int nvme_co_prw_aligned(BlockDriverState *bs,
{
int r;
BDRVNVMeState *s = bs->opaque;
NVMeQueuePair *ioq = s->queues[1];
NVMeQueuePair *ioq = s->queues[INDEX_IO(0)];
NVMeRequest *req;
uint32_t cdw12 = (((bytes >> s->blkshift) - 1) & 0xFFFF) |
@ -1171,7 +1176,7 @@ static coroutine_fn int nvme_co_pwritev(BlockDriverState *bs,
static coroutine_fn int nvme_co_flush(BlockDriverState *bs)
{
BDRVNVMeState *s = bs->opaque;
NVMeQueuePair *ioq = s->queues[1];
NVMeQueuePair *ioq = s->queues[INDEX_IO(0)];
NVMeRequest *req;
NvmeCmd cmd = {
.opcode = NVME_CMD_FLUSH,
@ -1202,7 +1207,7 @@ static coroutine_fn int nvme_co_pwrite_zeroes(BlockDriverState *bs,
BdrvRequestFlags flags)
{
BDRVNVMeState *s = bs->opaque;
NVMeQueuePair *ioq = s->queues[1];
NVMeQueuePair *ioq = s->queues[INDEX_IO(0)];
NVMeRequest *req;
uint32_t cdw12 = ((bytes >> s->blkshift) - 1) & 0xFFFF;
@ -1255,7 +1260,7 @@ static int coroutine_fn nvme_co_pdiscard(BlockDriverState *bs,
int bytes)
{
BDRVNVMeState *s = bs->opaque;
NVMeQueuePair *ioq = s->queues[1];
NVMeQueuePair *ioq = s->queues[INDEX_IO(0)];
NVMeRequest *req;
NvmeDsmRange *buf;
QEMUIOVector local_qiov;
@ -1398,7 +1403,7 @@ static void nvme_aio_unplug(BlockDriverState *bs)
BDRVNVMeState *s = bs->opaque;
assert(s->plugged);
s->plugged = false;
for (i = 1; i < s->nr_queues; i++) {
for (i = INDEX_IO(0); i < s->nr_queues; i++) {
NVMeQueuePair *q = s->queues[i];
qemu_mutex_lock(&q->lock);
nvme_kick(q);