On Mon, 2020-03-16 at 07:28 -0700, Klaus Jensen wrote:
> From: Klaus Jensen <k.jen...@samsung.com>
>
> Required for compliance with NVMe revision 1.2.1. See NVM Express 1.2.1,
> Section 5.1 ("Abort command").
>
> The Abort command is a best effort command; for now, the device always
> fails to abort the given command.
>
> Signed-off-by: Klaus Jensen <klaus.jen...@cnexlabs.com>
> Acked-by: Keith Busch <kbu...@kernel.org>
> ---
> hw/block/nvme.c | 27 +++++++++++++++++++++++++++
> 1 file changed, 27 insertions(+)
>
> diff --git a/hw/block/nvme.c b/hw/block/nvme.c
> index 08a83d449de3..7cf7cf55143e 100644
> --- a/hw/block/nvme.c
> +++ b/hw/block/nvme.c
> @@ -729,6 +729,18 @@ static uint16_t nvme_identify(NvmeCtrl *n, NvmeCmd *cmd)
> }
> }
>
> +static uint16_t nvme_abort(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
> +{
> + uint16_t sqid = le32_to_cpu(cmd->cdw10) & 0xffff;
> +
> + req->cqe.result = 1;
> + if (nvme_check_sqid(n, sqid)) {
> + return NVME_INVALID_FIELD | NVME_DNR;
> + }
> +
> + return NVME_SUCCESS;
> +}
> +
> static inline void nvme_set_timestamp(NvmeCtrl *n, uint64_t ts)
> {
> trace_nvme_dev_setfeat_timestamp(ts);
> @@ -863,6 +875,8 @@ static uint16_t nvme_admin_cmd(NvmeCtrl *n, NvmeCmd *cmd,
> NvmeRequest *req)
> return nvme_create_cq(n, cmd);
> case NVME_ADM_CMD_IDENTIFY:
> return nvme_identify(n, cmd);
> + case NVME_ADM_CMD_ABORT:
> + return nvme_abort(n, cmd, req);
> case NVME_ADM_CMD_SET_FEATURES:
> return nvme_set_feature(n, cmd, req);
> case NVME_ADM_CMD_GET_FEATURES:
> @@ -1375,6 +1389,19 @@ static void nvme_realize(PCIDevice *pci_dev, Error
> **errp)
> id->ieee[1] = 0x02;
> id->ieee[2] = 0xb3;
> id->oacs = cpu_to_le16(0);
> +
> + /*
> + * Because the controller always completes the Abort command immediately,
> + * there can never be more than one concurrently executing Abort command,
> + * so this value is never used for anything. Note that there can easily
> be
> + * many Abort commands in the queues, but they are not considered
> + * "executing" until processed by nvme_abort.
> + *
> + * The specification recommends a value of 3 for Abort Command Limit
> (four
> + * concurrently outstanding Abort commands), so lets use that though it
> is
> + * inconsequential.
> + */
> + id->acl = 3;
> id->frmw = 7 << 1;
> id->lpa = 1 << 0;
> id->sqes = (0x6 << 4) | 0x6;
You forgot to move my reviewed-by from the previous version
I see that you also fixed the white space problem, thanks!
So,
Reviewed-by: Maxim Levitsky <mlevi...@redhat.com>
Best regards,
Maxim Levitsky
