STRUCT PDS_VDPA_IDENT(9)

okay bestie, welcome to the Kernel API Manual page for struct pds_vdpa_ident(9) — the little struct that is literally the vDPA identification data moment. ✨ Grab your iced coffee, we’re doing this 💅

✨ NAME ✨

struct pds_vdpa_ident — vDPA identification data. That’s the vibe, that’s the whole assignment. 🫶

🦋 SYNOPSIS 🦋

       struct pds_vdpa_ident {
           __le64 hw_features;
           __le16 max_vqs;
           __le16 max_qlen;
           __le16 min_qlen;
        };

🎀 Members 🎀

• hw_features — vDPA features supported by device. iconic.
• max_vqs — max queues available (2 queues for a single queuepair). noted, bestie.
• max_qlen — log(2) of maximum number of descriptors.
• min_qlen — log(2) of minimum number of descriptors.

🌸 Description 🌸

This struct is used in a DMA block that is set up for the PDS_VDPA_CMD_IDENT transaction. Set up the DMA block and send the address in the IDENT cmd data, the DSC will write the ident information, then we can remove the DMA block after reading the answer. If the completion status is 0, then there is valid information, else there was an error and the data should be invalid. 💀 no cap, that’s the whole flow.

🔥 SEE ALSO 🔥

• Kernel file ./include/linux/pds/pds_adminq.h
• struct pds_core_notifyq_event(9), struct pds_core_link_change_event(9), struct pds_core_reset_event(9), struct pds_core_client_event(9), struct pds_core_notifyq_cmd(9), struct pds_core_client_reg_cmd(9), struct pds_core_client_reg_comp(9), struct pds_core_client_unreg_cmd(9), struct pds_core_client_request_cmd(9), enum pds_core_logical_qtype(9), union pds_core_lif_config(9), struct pds_core_lif_status(9), struct pds_core_lif_info(9), struct pds_core_lif_identity(9), struct pds_core_lif_identify_cmd(9), struct pds_core_lif_identify_comp(9), struct pds_core_lif_init_cmd(9), struct pds_core_lif_init_comp(9), struct pds_core_lif_reset_cmd(9), enum pds_core_lif_attr(9), struct pds_core_lif_setattr_cmd(9), struct pds_core_lif_setattr_comp(9), struct pds_core_lif_getattr_cmd(9), struct pds_core_lif_getattr_comp(9), struct pds_core_q_identity(9), struct pds_core_q_identify_cmd(9), struct pds_core_q_identify_comp(9), struct pds_core_q_init_cmd(9), struct pds_core_q_init_comp(9)
• struct pds_vdpa_cmd(9), struct pds_vdpa_init_cmd(9), struct pds_vdpa_ident_cmd(9), struct pds_vdpa_status_cmd(9), enum pds_vdpa_attr(9), struct pds_vdpa_setattr_cmd(9), struct pds_vdpa_vq_init_cmd(9), struct pds_vdpa_vq_init_comp(9), struct pds_vdpa_vq_reset_cmd(9), struct pds_vdpa_vq_reset_comp(9), struct pds_vdpa_set_features_cmd(9)
• struct pds_lm_cmd(9), struct pds_lm_state_size_cmd(9), struct pds_lm_state_size_comp(9), struct pds_lm_suspend_cmd(9), struct pds_lm_suspend_status_cmd(9), struct pds_lm_resume_cmd(9), struct pds_lm_sg_elem(9), struct pds_lm_save_cmd(9), struct pds_lm_restore_cmd(9), union pds_lm_dev_state(9), struct pds_lm_dirty_region_info(9), struct pds_lm_dirty_status_cmd(9), enum pds_lm_dirty_bmp_type(9), struct pds_lm_dirty_status_comp(9), struct pds_lm_dirty_enable_cmd(9), struct pds_lm_dirty_disable_cmd(9), struct pds_lm_dirty_seq_ack_cmd(9), struct pds_lm_host_vf_status_cmd(9)
• struct pds_fwctl_cmd(9), struct pds_fwctl_comp(9), struct pds_fwctl_ident_cmd(9), struct pds_fwctl_ident(9), struct pds_fwctl_query_cmd(9), struct pds_fwctl_query_comp(9), struct pds_fwctl_query_data_endpoint(9), struct pds_fwctl_query_data_operation(9), struct pds_fwctl_query_data(9), struct pds_fwctl_rpc_cmd(9), struct pds_sg_elem(9), struct pds_fwctl_rpc_comp(9)

Source/version ./include/linux/pds, dated October 2026, page struct pds_vdpa_ident(9) — that’s the cute little footer, bestie. Bye! 💖✨