STRUCT ADF_GEN4_TL_DEVICE_DATA_REGS(9)

💖 struct adf_gen4_tl_device_data_regs — a peek inside the Kernel API Manual 💖

okay bestie, sit down, because we're about to get into struct adf_gen4_tl_device_data_regs and honestly? it's giving ✨telemetry era✨. This structure stores device telemetry counter values as are being populated periodically by device. that's the whole vibe — the device keeps topping these off like it's refilling your iced coffee 🧊☕ and this struct is where all of it lives.

🌸 SYNOPSIS 🌸

no cap, here's the whole shape of her — every field, in order, exactly as she is:

struct adf_gen4_tl_device_data_regs {
    __u64 reg_tl_rd_lat_acc;
    __u64 reg_tl_gp_lat_acc;
    __u64 reg_tl_at_page_req_lat_acc;
    __u64 reg_tl_at_trans_lat_acc;
    __u64 reg_tl_re_acc;
    __u32 reg_tl_pci_trans_cnt;
    __u32 reg_tl_rd_lat_max;
    __u32 reg_tl_rd_cmpl_cnt;
    __u32 reg_tl_gp_lat_max;
    __u32 reg_tl_ae_put_cnt;
    __u32 reg_tl_bw_in;
    __u32 reg_tl_bw_out;
    __u32 reg_tl_at_page_req_cnt;
    __u32 reg_tl_at_trans_lat_cnt;
    __u32 reg_tl_at_max_tlb_used;
    __u32 reg_tl_re_cnt;
    __u32 reserved;
    struct adf_gen4_tl_slice_data_regs ath_slices[ADF_GEN4_TL_MAX_SLICES_PER_TYPE];
    struct adf_gen4_tl_slice_data_regs cph_slices[ADF_GEN4_TL_MAX_SLICES_PER_TYPE];
    struct adf_gen4_tl_slice_data_regs cpr_slices[ADF_GEN4_TL_MAX_SLICES_PER_TYPE];
    struct adf_gen4_tl_slice_data_regs xlt_slices[ADF_GEN4_TL_MAX_SLICES_PER_TYPE];
    struct adf_gen4_tl_slice_data_regs dcpr_slices[ADF_GEN4_TL_MAX_SLICES_PER_TYPE];
    struct adf_gen4_tl_slice_data_regs pke_slices[ADF_GEN4_TL_MAX_SLICES_PER_TYPE];
    struct adf_gen4_tl_slice_data_regs ucs_slices[ADF_GEN4_TL_MAX_SLICES_PER_TYPE];
    struct adf_gen4_tl_slice_data_regs wat_slices[ADF_GEN4_TL_MAX_SLICES_PER_TYPE];
    struct adf_gen4_tl_slice_data_regs wcp_slices[ADF_GEN4_TL_MAX_SLICES_PER_TYPE];
};

like, look at her. five __u64s up top doing the heavy lifting, then it's __u32 szn 🔥, one little reserved doing absolutely nothing (respect tho 💅), and then nine whole slice arrays. main character energy, fr fr.

🎀 Members 🎀

okay so here's the member-by-member breakdown, and no I did not skip a single one, iykyk:

• reg_tl_rd_lat_acc — read latency accumulator 💫 (it's accumulating, she's been through a lot)
• reg_tl_gp_lat_acc — get-put latency accumulator
• reg_tl_at_page_req_lat_acc — AT/DevTLB page request latency accumulator
• reg_tl_at_trans_lat_acc — DevTLB transaction latency accumulator
• reg_tl_re_acc — accumulated ring empty time 🕳️ (the ring was empty, she kept track)
• reg_tl_pci_trans_cnt — PCIe partial transactions
• reg_tl_rd_lat_max — maximum logged read latency, the record-holder 👑
• reg_tl_rd_cmpl_cnt — read requests completed count ✅
• reg_tl_gp_lat_max — maximum logged get to put latency
• reg_tl_ae_put_cnt — Accelerator Engine put counts across all rings, like all of them, she's thorough
• reg_tl_bw_in — PCIe write bandwidth
• reg_tl_bw_out — PCIe read bandwidth
• reg_tl_at_page_req_cnt — DevTLB page requests count
• reg_tl_at_trans_lat_cnt — DevTLB transaction latency samples count
• reg_tl_at_max_tlb_used — maximum uTLB used
• reg_tl_re_cnt — ring empty time samples count
• reserved — reserved 🫥 (she's literally just sitting there, iconic)
• ath_slices — array of Authentication slices utilization registers 🦋
• cph_slices — array of Cipher slices utilization registers
• cpr_slices — array of Compression slices utilization registers
• xlt_slices — array of Translator slices utilization registers
• dcpr_slices — array of Decompression slices utilization registers
• pke_slices — array of PKE slices utilization registers
• ucs_slices — array of UCS slices utilization registers
• wat_slices — array of Wireless Authentication slices utilization registers 🌈
• wcp_slices — array of Wireless Cipher slices utilization registers

💀 reminder bestie: every single one of those slice arrays is sized ADF_GEN4_TL_MAX_SLICES_PER_TYPE. don't come for me, that's just how it is.

🦋 SEE ALSO 🦋

go look at the Kernel file ./drivers/crypto/intel/qat/qat_common/adf_gen4_tl.h — and while you're in the neighborhood, say hi to struct adf_gen4_tl_slice_data_regs(9), struct adf_gen4_tl_ring_pair_data_regs(9), and struct adf_gen4_tl_layout(9) 🫶 they're all part of the same friend group, honestly.

and that's the page!! 🎀 sourced from ./drivers/crypto/intel/qat/qat... and dated October 2026, brought to you by your resident kernel-obsessed bestie. slay, go read some more manpages, mwah 💜✨