svc_rdma_iov_dma_map(9)

hi bestie 💖 welcome to the svc_rdma_iov_dma_map(9) page in the Kernel API Manual. this one is short and sweet: it's the lil function that DMA maps an iovec, and honestly it's giving “small but important” ✨

🌸 NAME 🌸

svc_rdma_iov_dma_map — DMA map an iovec 💫

🧚 SYNOPSIS 🧚

int svc_rdma_iov_dma_map (void *data , const struct kvec *iov );

🎀 ARGUMENTS 🎀

• data — pointer to arguments. yes bestie, that's the whole description 💅
• iov — kvec to DMA map. slay 🦋

🦋 DESCRIPTION 🦋

okay so here's the tea ☕: ib_dma_map_page is used here because svc_rdma_dma_unmap handles DMA-unmap and it uses ib_dma_unmap_page exclusively. that's literally the whole reason, no cap. iykyk 🫶

💀 RETURN 💀

• 0 if DMA mapping was successful ✅
• -EIO if the iovec cannot be DMA mapped 😭

🔥 SEE ALSO 🔥

the whole friend group is here, bestie 🫶:

• Kernel file ./net/sunrpc/xprtrdma/svc_rdma_sendto.c
• svc_rdma_send_ctxts_destroy(9)
• svc_rdma_send_ctxt_get(9)
• svc_rdma_send_ctxts_drain(9)
• svc_rdma_send_ctxt_put(9)
• svc_rdma_wake_send_waiters(9)
• svc_rdma_sq_wait(9)
• svc_rdma_post_send_err(9)
• svc_rdma_wc_send(9)
• svc_rdma_post_send(9)
• svc_rdma_encode_read_list(9)
• svc_rdma_encode_write_segment(9)
• svc_rdma_encode_write_chunk(9)
• svc_rdma_encode_write_list(9)
• svc_rdma_encode_reply_chunk(9)
• svc_rdma_page_dma_map(9)
• svc_rdma_xb_dma_map(9)
• svc_rdma_xb_count_sges(9)
• svc_rdma_check_pull_up(9)
• svc_rdma_xb_linearize(9)
• svc_rdma_pull_up_reply_msg(9)
• svc_rdma_send_error_msg(9)
• svc_rdma_sendto(9)
• svc_rdma_result_payload(9)

mwah 💋 — this lil page comes from source/version ./net/sunrpc/xprtrdma, dated October 2026, and it's the svc_rdma_iov_dma_map(9) manual page. bye bestie, go DMA map something cute 🎀