drivers/edac/octeon_edac-lmc.c

Source file repositories/reference/linux-study-clean/drivers/edac/octeon_edac-lmc.c

File Facts

System
Linux kernel
Corpus path
drivers/edac/octeon_edac-lmc.c
Extension
.c
Size
8729 bytes
Lines
325
Domain
Driver Families
Bucket
drivers/edac
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct octeon_lmc_pvt {
	unsigned long inject;
	unsigned long error_type;
	unsigned long dimm;
	unsigned long rank;
	unsigned long bank;
	unsigned long row;
	unsigned long col;
};

static void octeon_lmc_edac_poll(struct mem_ctl_info *mci)
{
	union cvmx_lmcx_mem_cfg0 cfg0;
	bool do_clear = false;
	char msg[64];

	cfg0.u64 = cvmx_read_csr(CVMX_LMCX_MEM_CFG0(mci->mc_idx));
	if (cfg0.s.sec_err || cfg0.s.ded_err) {
		union cvmx_lmcx_fadr fadr;
		fadr.u64 = cvmx_read_csr(CVMX_LMCX_FADR(mci->mc_idx));
		snprintf(msg, sizeof(msg),
			 "DIMM %d rank %d bank %d row %d col %d",
			 fadr.cn30xx.fdimm, fadr.cn30xx.fbunk,
			 fadr.cn30xx.fbank, fadr.cn30xx.frow, fadr.cn30xx.fcol);
	}

	if (cfg0.s.sec_err) {
		edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, 1, 0, 0, 0,
				     -1, -1, -1, msg, "");
		cfg0.s.sec_err = -1;	/* Done, re-arm */
		do_clear = true;
	}

	if (cfg0.s.ded_err) {
		edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1, 0, 0, 0,
				     -1, -1, -1, msg, "");
		cfg0.s.ded_err = -1;	/* Done, re-arm */
		do_clear = true;
	}
	if (do_clear)
		cvmx_write_csr(CVMX_LMCX_MEM_CFG0(mci->mc_idx), cfg0.u64);
}

static void octeon_lmc_edac_poll_o2(struct mem_ctl_info *mci)
{
	struct octeon_lmc_pvt *pvt = mci->pvt_info;
	union cvmx_lmcx_int int_reg;
	bool do_clear = false;
	char msg[64];

	if (!pvt->inject)
		int_reg.u64 = cvmx_read_csr(CVMX_LMCX_INT(mci->mc_idx));
	else {
		int_reg.u64 = 0;
		if (pvt->error_type == 1)
			int_reg.s.sec_err = 1;
		if (pvt->error_type == 2)
			int_reg.s.ded_err = 1;
	}

	if (int_reg.s.sec_err || int_reg.s.ded_err) {
		union cvmx_lmcx_fadr fadr;
		if (likely(!pvt->inject))
			fadr.u64 = cvmx_read_csr(CVMX_LMCX_FADR(mci->mc_idx));
		else {
			fadr.cn61xx.fdimm = pvt->dimm;
			fadr.cn61xx.fbunk = pvt->rank;
			fadr.cn61xx.fbank = pvt->bank;
			fadr.cn61xx.frow = pvt->row;
			fadr.cn61xx.fcol = pvt->col;
		}
		snprintf(msg, sizeof(msg),
			 "DIMM %d rank %d bank %d row %d col %d",
			 fadr.cn61xx.fdimm, fadr.cn61xx.fbunk,
			 fadr.cn61xx.fbank, fadr.cn61xx.frow, fadr.cn61xx.fcol);
	}

	if (int_reg.s.sec_err) {
		edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, 1, 0, 0, 0,
				     -1, -1, -1, msg, "");
		int_reg.s.sec_err = -1;	/* Done, re-arm */
		do_clear = true;
	}

	if (int_reg.s.ded_err) {
		edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1, 0, 0, 0,
				     -1, -1, -1, msg, "");
		int_reg.s.ded_err = -1;	/* Done, re-arm */
		do_clear = true;
	}

Annotation

Implementation Notes