On Mon, 2020-06-29 at 20:26 +0200, Klaus Jensen wrote:
> From: Klaus Jensen <k.jen...@samsung.com>
>
> Since the device does not have any persistance state storage, no
> features are "saveable" and setting the Save (SV) field in any Set
> Features command will result in a Feature Identifier Not Saveable status
> code.
>
> Similarly, if the Select (SEL) field is set to request saved values, the
> devices will (as it should) return the default values instead.
>
> Since this also introduces "Supported Capabilities", the nsid field is
> now also checked for validity wrt. the feature being get/set'ed.
>
> Signed-off-by: Klaus Jensen <k.jen...@samsung.com>
> ---
> hw/block/nvme.c | 87 +++++++++++++++++++++++++++++++++++++++----
> hw/block/nvme.h | 8 ++++
> hw/block/trace-events | 4 +-
> include/block/nvme.h | 27 +++++++++++++-
> 4 files changed, 115 insertions(+), 11 deletions(-)
>
> diff --git a/hw/block/nvme.c b/hw/block/nvme.c
> index 647f408854ae..a41665746d33 100644
> --- a/hw/block/nvme.c
> +++ b/hw/block/nvme.c
> @@ -1056,16 +1056,43 @@ static uint16_t nvme_get_feature(NvmeCtrl *n, NvmeCmd
> *cmd, NvmeRequest *req)
> {
> uint32_t dw10 = le32_to_cpu(cmd->cdw10);
> uint32_t dw11 = le32_to_cpu(cmd->cdw11);
> + uint32_t nsid = le32_to_cpu(cmd->nsid);
> uint32_t result;
> uint8_t fid = NVME_GETSETFEAT_FID(dw10);
> + NvmeGetFeatureSelect sel = NVME_GETFEAT_SELECT(dw10);
> uint16_t iv;
>
> - trace_pci_nvme_getfeat(nvme_cid(req), fid, dw11);
> + trace_pci_nvme_getfeat(nvme_cid(req), fid, sel, dw11);
>
> if (!nvme_feature_support[fid]) {
> return NVME_INVALID_FIELD | NVME_DNR;
> }
>
> + if (nvme_feature_cap[fid] & NVME_FEAT_CAP_NS) {
> + if (!nsid || nsid > n->num_namespaces) {
> + /*
> + * The Reservation Notification Mask and Reservation Persistence
> + * features require a status code of Invalid Field in Command
> when
> + * NSID is 0xFFFFFFFF. Since the device does not support those
> + * features we can always return Invalid Namespace or Format as
> we
> + * should do for all other features.
> + */
> + return NVME_INVALID_NSID | NVME_DNR;
> + }
> + }
> +
> + switch (sel) {
> + case NVME_GETFEAT_SELECT_CURRENT:
> + break;
> + case NVME_GETFEAT_SELECT_SAVED:
> + /* no features are saveable by the controller; fallthrough */
> + case NVME_GETFEAT_SELECT_DEFAULT:
> + goto defaults;
> + case NVME_GETFEAT_SELECT_CAP:
> + result = cpu_to_le32(nvme_feature_cap[fid]);
> + goto out;
> + }
> +
> switch (fid) {
> case NVME_TEMPERATURE_THRESHOLD:
> result = 0;
> @@ -1091,6 +1118,29 @@ static uint16_t nvme_get_feature(NvmeCtrl *n, NvmeCmd
> *cmd, NvmeRequest *req)
> case NVME_VOLATILE_WRITE_CACHE:
> result = cpu_to_le32(blk_enable_write_cache(n->conf.blk));
> trace_pci_nvme_getfeat_vwcache(result ? "enabled" : "disabled");
> + break;
> + case NVME_ASYNCHRONOUS_EVENT_CONF:
> + result = cpu_to_le32(n->features.async_config);
> + break;
> + case NVME_TIMESTAMP:
> + return nvme_get_feature_timestamp(n, cmd);
> + default:
> + break;
> + }
> +
> +defaults:
> + switch (fid) {
> + case NVME_TEMPERATURE_THRESHOLD:
> + result = 0;
This will reset the high or low threshold value set earlier in this function.
You could do the following to avoid this -
@ -1163,7 +1163,7 @@ static uint16_t nvme_get_feature(NvmeCtrl *n, NvmeCmd
*cmd, NvmeRequest *req)
break;
}
- break;
+ goto out;
case NVME_VOLATILE_WRITE_CACHE:
result = cpu_to_le32(blk_enable_write_cache(n->conf.blk));
trace_pci_nvme_getfeat_vwcache(result ? "enabled" : "disabled");
> +
> + if (NVME_TEMP_TMPSEL(dw11) != NVME_TEMP_TMPSEL_COMPOSITE) {
> + break;
> + }
> +
> + if (NVME_TEMP_THSEL(dw11) == NVME_TEMP_THSEL_OVER) {
> + result = cpu_to_le16(NVME_TEMPERATURE_WARNING);
> + }
> +
> break;
> case NVME_NUMBER_OF_QUEUES:
> result = cpu_to_le32((n->params.max_ioqpairs - 1) |
> @@ -1110,16 +1160,12 @@ static uint16_t nvme_get_feature(NvmeCtrl *n, NvmeCmd
> *cmd, NvmeRequest *req)
>
> result = cpu_to_le32(result);
> break;
> - case NVME_ASYNCHRONOUS_EVENT_CONF:
> - result = cpu_to_le32(n->features.async_config);
> - break;
> - case NVME_TIMESTAMP:
> - return nvme_get_feature_timestamp(n, cmd);
> default:
> result = cpu_to_le32(nvme_feature_default[fid]);
> break;
> }
>
> +out:
> req->cqe.result = result;
> return NVME_SUCCESS;
> }
> @@ -1146,14 +1192,37 @@ static uint16_t nvme_set_feature(NvmeCtrl *n, NvmeCmd
> *cmd, NvmeRequest *req)
> {
> uint32_t dw10 = le32_to_cpu(cmd->cdw10);
> uint32_t dw11 = le32_to_cpu(cmd->cdw11);
> + uint32_t nsid = le32_to_cpu(cmd->nsid);
> uint8_t fid = NVME_GETSETFEAT_FID(dw10);
> + uint8_t save = NVME_SETFEAT_SAVE(dw10);
>
> - trace_pci_nvme_setfeat(nvme_cid(req), fid, dw11);
> + trace_pci_nvme_setfeat(nvme_cid(req), fid, save, dw11);
> +
> + if (save) {
> + return NVME_FID_NOT_SAVEABLE | NVME_DNR;
> + }
>
> if (!nvme_feature_support[fid]) {
> return NVME_INVALID_FIELD | NVME_DNR;
> }
>
> + if (nvme_feature_cap[fid] & NVME_FEAT_CAP_NS) {
> + if (!nsid || (nsid != NVME_NSID_BROADCAST &&
> + nsid > n->num_namespaces)) {
> + return NVME_INVALID_NSID | NVME_DNR;
> + }
> + } else if (nsid && nsid != NVME_NSID_BROADCAST) {
> + if (nsid > n->num_namespaces) {
> + return NVME_INVALID_NSID | NVME_DNR;
> + }
> +
> + return NVME_FEAT_NOT_NS_SPEC | NVME_DNR;
> + }
> +
> + if (!(nvme_feature_cap[fid] & NVME_FEAT_CAP_CHANGE)) {
> + return NVME_FEAT_NOT_CHANGABLE | NVME_DNR;
> + }
> +
> switch (fid) {
> case NVME_TEMPERATURE_THRESHOLD:
> if (NVME_TEMP_TMPSEL(dw11) != NVME_TEMP_TMPSEL_COMPOSITE) {
> @@ -1998,7 +2067,9 @@ static void nvme_init_ctrl(NvmeCtrl *n, PCIDevice
> *pci_dev)
> id->sqes = (0x6 << 4) | 0x6;
> id->cqes = (0x4 << 4) | 0x4;
> id->nn = cpu_to_le32(n->num_namespaces);
> - id->oncs = cpu_to_le16(NVME_ONCS_WRITE_ZEROS | NVME_ONCS_TIMESTAMP);
> + id->oncs = cpu_to_le16(NVME_ONCS_WRITE_ZEROS | NVME_ONCS_TIMESTAMP |
> + NVME_ONCS_FEATURES);
> +
> id->psd[0].mp = cpu_to_le16(0x9c4);
> id->psd[0].enlat = cpu_to_le32(0x10);
> id->psd[0].exlat = cpu_to_le32(0x4);
> diff --git a/hw/block/nvme.h b/hw/block/nvme.h
> index d0763eb59e5d..34dddda29d96 100644
> --- a/hw/block/nvme.h
> +++ b/hw/block/nvme.h
> @@ -90,6 +90,14 @@ typedef struct NvmeFeatureVal {
> uint32_t async_config;
> } NvmeFeatureVal;
>
> +static const uint32_t nvme_feature_cap[0x100] = {
> + [NVME_TEMPERATURE_THRESHOLD] = NVME_FEAT_CAP_CHANGE,
> + [NVME_VOLATILE_WRITE_CACHE] = NVME_FEAT_CAP_CHANGE,
> + [NVME_NUMBER_OF_QUEUES] = NVME_FEAT_CAP_CHANGE,
> + [NVME_ASYNCHRONOUS_EVENT_CONF] = NVME_FEAT_CAP_CHANGE,
> + [NVME_TIMESTAMP] = NVME_FEAT_CAP_CHANGE,
> +};
> +
> static const uint32_t nvme_feature_default[0x100] = {
> [NVME_ARBITRATION] = NVME_ARB_AB_NOLIMIT,
> };
> diff --git a/hw/block/trace-events b/hw/block/trace-events
> index 42e62f4649f8..4a4ef34071df 100644
> --- a/hw/block/trace-events
> +++ b/hw/block/trace-events
> @@ -46,8 +46,8 @@ pci_nvme_identify_ctrl(void) "identify controller"
> pci_nvme_identify_ns(uint32_t ns) "nsid %"PRIu32""
> pci_nvme_identify_nslist(uint32_t ns) "nsid %"PRIu32""
> pci_nvme_get_log(uint16_t cid, uint8_t lid, uint8_t lsp, uint8_t rae,
> uint32_t len, uint64_t off) "cid %"PRIu16" lid 0x%"PRIx8" lsp 0x%"PRIx8" rae
> 0x%"PRIx8" len %"PRIu32" off %"PRIu64""
> -pci_nvme_getfeat(uint16_t cid, uint8_t fid, uint32_t cdw11) "cid %"PRIu16"
> fid 0x%"PRIx8" cdw11 0x%"PRIx32""
> -pci_nvme_setfeat(uint16_t cid, uint8_t fid, uint32_t cdw11) "cid %"PRIu16"
> fid 0x%"PRIx8" cdw11 0x%"PRIx32""
> +pci_nvme_getfeat(uint16_t cid, uint8_t fid, uint8_t sel, uint32_t cdw11)
> "cid %"PRIu16" fid 0x%"PRIx8" sel 0x%"PRIx8" cdw11 0x%"PRIx32""
> +pci_nvme_setfeat(uint16_t cid, uint8_t fid, uint8_t save, uint32_t cdw11)
> "cid %"PRIu16" fid 0x%"PRIx8" save 0x%"PRIx8" cdw11 0x%"PRIx32""
> pci_nvme_getfeat_vwcache(const char* result) "get feature volatile write
> cache, result=%s"
> pci_nvme_getfeat_numq(int result) "get feature number of queues, result=%d"
> pci_nvme_setfeat_numq(int reqcq, int reqsq, int gotcq, int gotsq) "requested
> cq_count=%d sq_count=%d, responding with cq_count=%d sq_count=%d"
> diff --git a/include/block/nvme.h b/include/block/nvme.h
> index 662e521c9e9b..60833039a6c5 100644
> --- a/include/block/nvme.h
> +++ b/include/block/nvme.h
> @@ -663,7 +663,7 @@ enum NvmeStatusCodes {
> NVME_INVALID_QUEUE_DEL = 0x010c,
> NVME_FID_NOT_SAVEABLE = 0x010d,
> NVME_FEAT_NOT_CHANGABLE = 0x010e,
> - NVME_FID_NOT_NSID_SPEC = 0x010f,
> + NVME_FEAT_NOT_NS_SPEC = 0x010f,
> NVME_FW_REQ_SUSYSTEM_RESET = 0x0110,
> NVME_CONFLICTING_ATTRS = 0x0180,
> NVME_INVALID_PROT_INFO = 0x0181,
> @@ -906,9 +906,32 @@ enum NvmeFeatureIds {
> NVME_SOFTWARE_PROGRESS_MARKER = 0x80
> };
>
> +typedef enum NvmeFeatureCap {
> + NVME_FEAT_CAP_SAVE = 1 << 0,
> + NVME_FEAT_CAP_NS = 1 << 1,
> + NVME_FEAT_CAP_CHANGE = 1 << 2,
> +} NvmeFeatureCap;
> +
> +typedef enum NvmeGetFeatureSelect {
> + NVME_GETFEAT_SELECT_CURRENT = 0x0,
> + NVME_GETFEAT_SELECT_DEFAULT = 0x1,
> + NVME_GETFEAT_SELECT_SAVED = 0x2,
> + NVME_GETFEAT_SELECT_CAP = 0x3,
> +} NvmeGetFeatureSelect;
> +
> #define NVME_GETSETFEAT_FID_MASK 0xff
> #define NVME_GETSETFEAT_FID(dw10) (dw10 & NVME_GETSETFEAT_FID_MASK)
>
> +#define NVME_GETFEAT_SELECT_SHIFT 8
> +#define NVME_GETFEAT_SELECT_MASK 0x7
> +#define NVME_GETFEAT_SELECT(dw10) \
> + ((dw10 >> NVME_GETFEAT_SELECT_SHIFT) & NVME_GETFEAT_SELECT_MASK)
> +
> +#define NVME_SETFEAT_SAVE_SHIFT 31
> +#define NVME_SETFEAT_SAVE_MASK 0x1
> +#define NVME_SETFEAT_SAVE(dw10) \
> + ((dw10 >> NVME_SETFEAT_SAVE_SHIFT) & NVME_SETFEAT_SAVE_MASK)
> +
> typedef struct NvmeRangeType {
> uint8_t type;
> uint8_t attributes;
> @@ -925,6 +948,8 @@ typedef struct NvmeLBAF {
> uint8_t rp;
> } NvmeLBAF;
>
> +#define NVME_NSID_BROADCAST 0xffffffff
> +
> typedef struct NvmeIdNs {
> uint64_t nsze;
> uint64_t ncap;
