| Message ID | 20240219150025.1531-3-shiju.jose@huawei.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | hw/cxl/cxl-mailbox-utils: Add feature commands, device patrol scrub control and DDR5 ECS control features | expand |
On Mon, 19 Feb 2024 23:00:24 +0800 <shiju.jose@huawei.com> wrote: > From: Shiju Jose <shiju.jose@huawei.com> > > CXL spec 3.1 section 8.2.9.9.11.1 describes the device patrol scrub control > feature. The device patrol scrub proactively locates and makes corrections > to errors in regular cycle. The patrol scrub control allows the request to > configure patrol scrub input configurations. > > The patrol scrub control allows the requester to specify the number of > hours for which the patrol scrub cycles must be completed, provided that > the requested number is not less than the minimum number of hours for the > patrol scrub cycle that the device is capable of. In addition, the patrol > scrub controls allow the host to disable and enable the feature in case > disabling of the feature is needed for other purposes such as > performance-aware operations which require the background operations to be > turned off. > > Reviewed-by: Davidlohr Bueso <dave@stgolabs.net> > Reviewed-by: Fan Ni <fan.ni@samsung.com> > Signed-off-by: Shiju Jose <shiju.jose@huawei.com> The data can't be global as we need to have separate controls per CXL type3 device so that each instance can have different settings. Otherwise a few minor comments inline. Jonathan > --- > hw/cxl/cxl-mailbox-utils.c | 97 +++++++++++++++++++++++++++++++++++++- > 1 file changed, 96 insertions(+), 1 deletion(-) > > diff --git a/hw/cxl/cxl-mailbox-utils.c b/hw/cxl/cxl-mailbox-utils.c > index 779ce80e3c..908ce16642 100644 > --- a/hw/cxl/cxl-mailbox-utils.c > +++ b/hw/cxl/cxl-mailbox-utils.c > @@ -997,6 +997,7 @@ typedef struct CXLSupportedFeatureEntry { > } QEMU_PACKED CXLSupportedFeatureEntry; > > enum CXL_SUPPORTED_FEATURES_LIST { > + CXL_FEATURE_PATROL_SCRUB = 0, > CXL_FEATURE_MAX > }; > > @@ -1037,6 +1038,38 @@ enum CXL_SET_FEATURE_FLAG_DATA_TRANSFER { > CXL_SET_FEATURE_FLAG_DATA_TRANSFER_MAX > }; > > +/* CXL r3.1 section 8.2.9.9.11.1: Device Patrol Scrub Control Feature */ > +static const QemuUUID patrol_scrub_uuid = { > + .data = UUID(0x96dad7d6, 0xfde8, 0x482b, 0xa7, 0x33, > + 0x75, 0x77, 0x4e, 0x06, 0xdb, 0x8a) > +}; > + > +#define CXL_MEMDEV_PS_GET_FEATURE_VERSION 0x01 > +#define CXL_MEMDEV_PS_SET_FEATURE_VERSION 0x01 > +#define CXL_MEMDEV_PS_SCRUB_CYCLE_CHANGE_CAP_DEFAULT BIT(0) > +#define CXL_MEMDEV_PS_SCRUB_REALTIME_REPORT_CAP_DEFAULT BIT(1) > +#define CXL_MEMDEV_PS_CUR_SCRUB_CYCLE_DEFAULT 12 > +#define CXL_MEMDEV_PS_MIN_SCRUB_CYCLE_DEFAULT 1 > +#define CXL_MEMDEV_PS_ENABLE_DEFAULT 0 > + > +/* CXL memdev patrol scrub control attributes */ > +typedef struct CXLMemPatrolScrubReadAttrs { > + uint8_t scrub_cycle_cap; > + uint16_t scrub_cycle; > + uint8_t scrub_flags; > +} QEMU_PACKED CXLMemPatrolScrubReadAttrs; > + > +typedef struct CXLMemPatrolScrubWriteAttrs { > + uint8_t scrub_cycle_hr; > + uint8_t scrub_flags; > +} QEMU_PACKED CXLMemPatrolScrubWriteAttrs; > + > +typedef struct CXLMemPatrolScrubSetFeature { > + CXLSetFeatureInHeader hdr; > + CXLMemPatrolScrubWriteAttrs feat_data; > +} QEMU_PACKED QEMU_ALIGNED(16) CXLMemPatrolScrubSetFeature; > +static CXLMemPatrolScrubReadAttrs cxl_memdev_ps_feat_attrs; > + > /* CXL r3.1 section 8.2.9.6.1: Get Supported Features (Opcode 0500h) */ > static CXLRetCode cmd_features_get_supported(const struct cxl_cmd *cmd, > uint8_t *payload_in, > @@ -1060,7 +1093,7 @@ static CXLRetCode cmd_features_get_supported(const struct cxl_cmd *cmd, > uint16_t feat_entries = 0; > > if (get_feats_in->count < sizeof(CXLSupportedFeatureHeader) || > - get_feats_in->start_index > CXL_FEATURE_MAX) { > + get_feats_in->start_index >= CXL_FEATURE_MAX) { Change looks valid, but should have been in patch 1. > return CXL_MBOX_INVALID_INPUT; > } > req_entries = (get_feats_in->count - > @@ -1072,6 +1105,31 @@ static CXLRetCode cmd_features_get_supported(const struct cxl_cmd *cmd, > entry = 0; > while (entry < req_entries) { > switch (index) { > + case CXL_FEATURE_PATROL_SCRUB: > + /* Fill supported feature entry for device patrol scrub control */ > + get_feats_out->feat_entries[entry] = > + (struct CXLSupportedFeatureEntry) { > + .uuid = patrol_scrub_uuid, > + .feat_index = index, > + .get_feat_size = sizeof(CXLMemPatrolScrubReadAttrs), > + .set_feat_size = sizeof(CXLMemPatrolScrubWriteAttrs), > + /* Bit[0] : 1, feature attributes changeable */ > + .attr_flags = 0x1, > + .get_feat_version = CXL_MEMDEV_PS_GET_FEATURE_VERSION, > + .set_feat_version = CXL_MEMDEV_PS_SET_FEATURE_VERSION, > + .set_feat_effects = 0, > + }; > + feat_entries++; > + /* Set default value for device patrol scrub read attributes */ > + cxl_memdev_ps_feat_attrs.scrub_cycle_cap = > + CXL_MEMDEV_PS_SCRUB_CYCLE_CHANGE_CAP_DEFAULT | > + CXL_MEMDEV_PS_SCRUB_REALTIME_REPORT_CAP_DEFAULT; > + cxl_memdev_ps_feat_attrs.scrub_cycle = > + CXL_MEMDEV_PS_CUR_SCRUB_CYCLE_DEFAULT | > + (CXL_MEMDEV_PS_MIN_SCRUB_CYCLE_DEFAULT << 8); > + cxl_memdev_ps_feat_attrs.scrub_flags = > + CXL_MEMDEV_PS_ENABLE_DEFAULT; This is general defaults setup - doesn't belong here. Not strictly necessary for a driver to have called the query for supported features before trying to use them. Move this to mem/cxl_type3.c as part of the device emulation. > + break; > default: > break; > } > @@ -1112,6 +1170,20 @@ static CXLRetCode cmd_features_get_feature(const struct cxl_cmd *cmd, > return CXL_MBOX_INVALID_INPUT; > } > > + if (qemu_uuid_is_equal(&get_feature->uuid, &patrol_scrub_uuid)) { > + if (get_feature->offset >= sizeof(CXLMemPatrolScrubReadAttrs)) { > + return CXL_MBOX_INVALID_INPUT; > + } > + bytes_to_copy = sizeof(CXLMemPatrolScrubReadAttrs) - > + get_feature->offset; > + bytes_to_copy = MIN(bytes_to_copy, get_feature->count); > + memcpy(payload_out, > + &cxl_memdev_ps_feat_attrs + get_feature->offset, > + bytes_to_copy); > + } else { > + return CXL_MBOX_UNSUPPORTED; > + } > + > *len_out = bytes_to_copy; > > return CXL_MBOX_SUCCESS; > @@ -1125,6 +1197,29 @@ static CXLRetCode cmd_features_set_feature(const struct cxl_cmd *cmd, > size_t *len_out, > CXLCCI *cci) > { > + CXLMemPatrolScrubWriteAttrs *ps_write_attrs; > + CXLMemPatrolScrubSetFeature *ps_set_feature; > + CXLSetFeatureInHeader *hdr = (void *)payload_in; > + > + if (qemu_uuid_is_equal(&hdr->uuid, &patrol_scrub_uuid)) { > + if (hdr->version != CXL_MEMDEV_PS_SET_FEATURE_VERSION || > + (hdr->flags & CXL_SET_FEATURE_FLAG_DATA_TRANSFER_MASK) != > + CXL_SET_FEATURE_FLAG_FULL_DATA_TRANSFER) { > + return CXL_MBOX_UNSUPPORTED; > + } > + > + ps_set_feature = (void *)payload_in; > + ps_write_attrs = &ps_set_feature->feat_data; > + cxl_memdev_ps_feat_attrs.scrub_cycle &= ~0xFF; This needed to be embedded in the Type 3 device structures - not globally shared. You'll need to check the device type, then convert cci->d to it. if (object_dynamic_cast(OBJECT(cci->d), TYPE_CXL_TYPE3)) { CXLType3Dev *ct3d = CXL_TYPE3(cci->d); Add the feature attrs to that structure (as for now it's type 3 specific and we don't have a generalized place for memory features beyond that). > + cxl_memdev_ps_feat_attrs.scrub_cycle |= > + ps_write_attrs->scrub_cycle_hr & 0xFF; > + cxl_memdev_ps_feat_attrs.scrub_flags &= ~0x1; > + cxl_memdev_ps_feat_attrs.scrub_flags |= > + ps_write_attrs->scrub_flags & 0x1; > + } else { > + return CXL_MBOX_UNSUPPORTED; > + } > + > return CXL_MBOX_SUCCESS; > } >
diff --git a/hw/cxl/cxl-mailbox-utils.c b/hw/cxl/cxl-mailbox-utils.c index 779ce80e3c..908ce16642 100644 --- a/hw/cxl/cxl-mailbox-utils.c +++ b/hw/cxl/cxl-mailbox-utils.c @@ -997,6 +997,7 @@ typedef struct CXLSupportedFeatureEntry { } QEMU_PACKED CXLSupportedFeatureEntry; enum CXL_SUPPORTED_FEATURES_LIST { + CXL_FEATURE_PATROL_SCRUB = 0, CXL_FEATURE_MAX }; @@ -1037,6 +1038,38 @@ enum CXL_SET_FEATURE_FLAG_DATA_TRANSFER { CXL_SET_FEATURE_FLAG_DATA_TRANSFER_MAX }; +/* CXL r3.1 section 8.2.9.9.11.1: Device Patrol Scrub Control Feature */ +static const QemuUUID patrol_scrub_uuid = { + .data = UUID(0x96dad7d6, 0xfde8, 0x482b, 0xa7, 0x33, + 0x75, 0x77, 0x4e, 0x06, 0xdb, 0x8a) +}; + +#define CXL_MEMDEV_PS_GET_FEATURE_VERSION 0x01 +#define CXL_MEMDEV_PS_SET_FEATURE_VERSION 0x01 +#define CXL_MEMDEV_PS_SCRUB_CYCLE_CHANGE_CAP_DEFAULT BIT(0) +#define CXL_MEMDEV_PS_SCRUB_REALTIME_REPORT_CAP_DEFAULT BIT(1) +#define CXL_MEMDEV_PS_CUR_SCRUB_CYCLE_DEFAULT 12 +#define CXL_MEMDEV_PS_MIN_SCRUB_CYCLE_DEFAULT 1 +#define CXL_MEMDEV_PS_ENABLE_DEFAULT 0 + +/* CXL memdev patrol scrub control attributes */ +typedef struct CXLMemPatrolScrubReadAttrs { + uint8_t scrub_cycle_cap; + uint16_t scrub_cycle; + uint8_t scrub_flags; +} QEMU_PACKED CXLMemPatrolScrubReadAttrs; + +typedef struct CXLMemPatrolScrubWriteAttrs { + uint8_t scrub_cycle_hr; + uint8_t scrub_flags; +} QEMU_PACKED CXLMemPatrolScrubWriteAttrs; + +typedef struct CXLMemPatrolScrubSetFeature { + CXLSetFeatureInHeader hdr; + CXLMemPatrolScrubWriteAttrs feat_data; +} QEMU_PACKED QEMU_ALIGNED(16) CXLMemPatrolScrubSetFeature; +static CXLMemPatrolScrubReadAttrs cxl_memdev_ps_feat_attrs; + /* CXL r3.1 section 8.2.9.6.1: Get Supported Features (Opcode 0500h) */ static CXLRetCode cmd_features_get_supported(const struct cxl_cmd *cmd, uint8_t *payload_in, @@ -1060,7 +1093,7 @@ static CXLRetCode cmd_features_get_supported(const struct cxl_cmd *cmd, uint16_t feat_entries = 0; if (get_feats_in->count < sizeof(CXLSupportedFeatureHeader) || - get_feats_in->start_index > CXL_FEATURE_MAX) { + get_feats_in->start_index >= CXL_FEATURE_MAX) { return CXL_MBOX_INVALID_INPUT; } req_entries = (get_feats_in->count - @@ -1072,6 +1105,31 @@ static CXLRetCode cmd_features_get_supported(const struct cxl_cmd *cmd, entry = 0; while (entry < req_entries) { switch (index) { + case CXL_FEATURE_PATROL_SCRUB: + /* Fill supported feature entry for device patrol scrub control */ + get_feats_out->feat_entries[entry] = + (struct CXLSupportedFeatureEntry) { + .uuid = patrol_scrub_uuid, + .feat_index = index, + .get_feat_size = sizeof(CXLMemPatrolScrubReadAttrs), + .set_feat_size = sizeof(CXLMemPatrolScrubWriteAttrs), + /* Bit[0] : 1, feature attributes changeable */ + .attr_flags = 0x1, + .get_feat_version = CXL_MEMDEV_PS_GET_FEATURE_VERSION, + .set_feat_version = CXL_MEMDEV_PS_SET_FEATURE_VERSION, + .set_feat_effects = 0, + }; + feat_entries++; + /* Set default value for device patrol scrub read attributes */ + cxl_memdev_ps_feat_attrs.scrub_cycle_cap = + CXL_MEMDEV_PS_SCRUB_CYCLE_CHANGE_CAP_DEFAULT | + CXL_MEMDEV_PS_SCRUB_REALTIME_REPORT_CAP_DEFAULT; + cxl_memdev_ps_feat_attrs.scrub_cycle = + CXL_MEMDEV_PS_CUR_SCRUB_CYCLE_DEFAULT | + (CXL_MEMDEV_PS_MIN_SCRUB_CYCLE_DEFAULT << 8); + cxl_memdev_ps_feat_attrs.scrub_flags = + CXL_MEMDEV_PS_ENABLE_DEFAULT; + break; default: break; } @@ -1112,6 +1170,20 @@ static CXLRetCode cmd_features_get_feature(const struct cxl_cmd *cmd, return CXL_MBOX_INVALID_INPUT; } + if (qemu_uuid_is_equal(&get_feature->uuid, &patrol_scrub_uuid)) { + if (get_feature->offset >= sizeof(CXLMemPatrolScrubReadAttrs)) { + return CXL_MBOX_INVALID_INPUT; + } + bytes_to_copy = sizeof(CXLMemPatrolScrubReadAttrs) - + get_feature->offset; + bytes_to_copy = MIN(bytes_to_copy, get_feature->count); + memcpy(payload_out, + &cxl_memdev_ps_feat_attrs + get_feature->offset, + bytes_to_copy); + } else { + return CXL_MBOX_UNSUPPORTED; + } + *len_out = bytes_to_copy; return CXL_MBOX_SUCCESS; @@ -1125,6 +1197,29 @@ static CXLRetCode cmd_features_set_feature(const struct cxl_cmd *cmd, size_t *len_out, CXLCCI *cci) { + CXLMemPatrolScrubWriteAttrs *ps_write_attrs; + CXLMemPatrolScrubSetFeature *ps_set_feature; + CXLSetFeatureInHeader *hdr = (void *)payload_in; + + if (qemu_uuid_is_equal(&hdr->uuid, &patrol_scrub_uuid)) { + if (hdr->version != CXL_MEMDEV_PS_SET_FEATURE_VERSION || + (hdr->flags & CXL_SET_FEATURE_FLAG_DATA_TRANSFER_MASK) != + CXL_SET_FEATURE_FLAG_FULL_DATA_TRANSFER) { + return CXL_MBOX_UNSUPPORTED; + } + + ps_set_feature = (void *)payload_in; + ps_write_attrs = &ps_set_feature->feat_data; + cxl_memdev_ps_feat_attrs.scrub_cycle &= ~0xFF; + cxl_memdev_ps_feat_attrs.scrub_cycle |= + ps_write_attrs->scrub_cycle_hr & 0xFF; + cxl_memdev_ps_feat_attrs.scrub_flags &= ~0x1; + cxl_memdev_ps_feat_attrs.scrub_flags |= + ps_write_attrs->scrub_flags & 0x1; + } else { + return CXL_MBOX_UNSUPPORTED; + } + return CXL_MBOX_SUCCESS; }