arch/mips/include/asm/octeon/cvmx-ipd.h

Source file repositories/reference/linux-study-clean/arch/mips/include/asm/octeon/cvmx-ipd.h

File Facts

System
Linux kernel
Corpus path
arch/mips/include/asm/octeon/cvmx-ipd.h
Extension
.h
Size
10740 bytes
Lines
340
Domain
Architecture Layer
Bucket
arch/mips
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

if (octeon_has_feature(OCTEON_FEATURE_NO_WPTR)) {
			union cvmx_ipd_ctl_status ipd_ctl_status;
			ipd_ctl_status.u64 = cvmx_read_csr(CVMX_IPD_CTL_STATUS);
			if (ipd_ctl_status.s.no_wptr)
				no_wptr = 1;
		}

		/* Free the prefetched WQE */
		if (ipd_ptr_count.s.wqev_cnt) {
			union cvmx_ipd_wqe_ptr_valid ipd_wqe_ptr_valid;
			ipd_wqe_ptr_valid.u64 =
			    cvmx_read_csr(CVMX_IPD_WQE_PTR_VALID);
			if (no_wptr)
				cvmx_fpa_free(cvmx_phys_to_ptr
					      ((uint64_t) ipd_wqe_ptr_valid.s.
					       ptr << 7), CVMX_FPA_PACKET_POOL,
					      0);
			else
				cvmx_fpa_free(cvmx_phys_to_ptr
					      ((uint64_t) ipd_wqe_ptr_valid.s.
					       ptr << 7), CVMX_FPA_WQE_POOL, 0);
		}

		/* Free all WQE in the fifo */
		if (ipd_ptr_count.s.wqe_pcnt) {
			int i;
			union cvmx_ipd_pwp_ptr_fifo_ctl ipd_pwp_ptr_fifo_ctl;
			ipd_pwp_ptr_fifo_ctl.u64 =
			    cvmx_read_csr(CVMX_IPD_PWP_PTR_FIFO_CTL);
			for (i = 0; i < ipd_ptr_count.s.wqe_pcnt; i++) {
				ipd_pwp_ptr_fifo_ctl.s.cena = 0;
				ipd_pwp_ptr_fifo_ctl.s.raddr =
				    ipd_pwp_ptr_fifo_ctl.s.max_cnts +
				    (ipd_pwp_ptr_fifo_ctl.s.wraddr +
				     i) % ipd_pwp_ptr_fifo_ctl.s.max_cnts;
				cvmx_write_csr(CVMX_IPD_PWP_PTR_FIFO_CTL,
					       ipd_pwp_ptr_fifo_ctl.u64);
				ipd_pwp_ptr_fifo_ctl.u64 =
				    cvmx_read_csr(CVMX_IPD_PWP_PTR_FIFO_CTL);
				if (no_wptr)
					cvmx_fpa_free(cvmx_phys_to_ptr
						      ((uint64_t)
						       ipd_pwp_ptr_fifo_ctl.s.
						       ptr << 7),
						      CVMX_FPA_PACKET_POOL, 0);
				else
					cvmx_fpa_free(cvmx_phys_to_ptr
						      ((uint64_t)
						       ipd_pwp_ptr_fifo_ctl.s.
						       ptr << 7),
						      CVMX_FPA_WQE_POOL, 0);
			}
			ipd_pwp_ptr_fifo_ctl.s.cena = 1;
			cvmx_write_csr(CVMX_IPD_PWP_PTR_FIFO_CTL,
				       ipd_pwp_ptr_fifo_ctl.u64);
		}

		/* Free the prefetched packet */
		if (ipd_ptr_count.s.pktv_cnt) {
			union cvmx_ipd_pkt_ptr_valid ipd_pkt_ptr_valid;
			ipd_pkt_ptr_valid.u64 =
			    cvmx_read_csr(CVMX_IPD_PKT_PTR_VALID);
			cvmx_fpa_free(cvmx_phys_to_ptr
				      (ipd_pkt_ptr_valid.s.ptr << 7),
				      CVMX_FPA_PACKET_POOL, 0);
		}

		/* Free the per port prefetched packets */
		if (1) {
			int i;
			union cvmx_ipd_prc_port_ptr_fifo_ctl
			    ipd_prc_port_ptr_fifo_ctl;
			ipd_prc_port_ptr_fifo_ctl.u64 =
			    cvmx_read_csr(CVMX_IPD_PRC_PORT_PTR_FIFO_CTL);

			for (i = 0; i < ipd_prc_port_ptr_fifo_ctl.s.max_pkt;
			     i++) {
				ipd_prc_port_ptr_fifo_ctl.s.cena = 0;
				ipd_prc_port_ptr_fifo_ctl.s.raddr =
				    i % ipd_prc_port_ptr_fifo_ctl.s.max_pkt;
				cvmx_write_csr(CVMX_IPD_PRC_PORT_PTR_FIFO_CTL,
					       ipd_prc_port_ptr_fifo_ctl.u64);
				ipd_prc_port_ptr_fifo_ctl.u64 =
				    cvmx_read_csr
				    (CVMX_IPD_PRC_PORT_PTR_FIFO_CTL);
				cvmx_fpa_free(cvmx_phys_to_ptr
					      ((uint64_t)
					       ipd_prc_port_ptr_fifo_ctl.s.
					       ptr << 7), CVMX_FPA_PACKET_POOL,
					      0);

Annotation

Implementation Notes