static int l3_handle_target()

in omap_l3_noc.c [58:154]

• 75 lines of code
• 10 McCabe index (conditional complexity)

static int l3_handle_target(struct omap_l3 *l3, void __iomem *base,
			    struct l3_flagmux_data *flag_mux, int err_src)
{
	int k;
	u32 std_err_main, clear, masterid;
	u8 op_code, m_req_info;
	void __iomem *l3_targ_base;
	void __iomem *l3_targ_stderr, *l3_targ_slvofslsb, *l3_targ_mstaddr;
	void __iomem *l3_targ_hdr, *l3_targ_info;
	struct l3_target_data *l3_targ_inst;
	struct l3_masters_data *master;
	char *target_name, *master_name = "UN IDENTIFIED";
	char *err_description;
	char err_string[30] = { 0 };
	char info_string[60] = { 0 };

	/* We DONOT expect err_src to go out of bounds */
	BUG_ON(err_src > MAX_CLKDM_TARGETS);

	if (err_src < flag_mux->num_targ_data) {
		l3_targ_inst = &flag_mux->l3_targ[err_src];
		target_name = l3_targ_inst->name;
		l3_targ_base = base + l3_targ_inst->offset;
	} else {
		target_name = L3_TARGET_NOT_SUPPORTED;
	}

	if (target_name == L3_TARGET_NOT_SUPPORTED)
		return -ENODEV;

	/* Read the stderrlog_main_source from clk domain */
	l3_targ_stderr = l3_targ_base + L3_TARG_STDERRLOG_MAIN;
	l3_targ_slvofslsb = l3_targ_base + L3_TARG_STDERRLOG_SLVOFSLSB;

	std_err_main = readl_relaxed(l3_targ_stderr);

	switch (std_err_main & CUSTOM_ERROR) {
	case STANDARD_ERROR:
		err_description = "Standard";
		snprintf(err_string, sizeof(err_string),
			 ": At Address: 0x%08X ",
			 readl_relaxed(l3_targ_slvofslsb));

		l3_targ_mstaddr = l3_targ_base + L3_TARG_STDERRLOG_MSTADDR;
		l3_targ_hdr = l3_targ_base + L3_TARG_STDERRLOG_HDR;
		l3_targ_info = l3_targ_base + L3_TARG_STDERRLOG_INFO;
		break;

	case CUSTOM_ERROR:
		err_description = "Custom";

		l3_targ_mstaddr = l3_targ_base +
				  L3_TARG_STDERRLOG_CINFO_MSTADDR;
		l3_targ_hdr = l3_targ_base + L3_TARG_STDERRLOG_CINFO_OPCODE;
		l3_targ_info = l3_targ_base + L3_TARG_STDERRLOG_CINFO_INFO;
		break;

	default:
		/* Nothing to be handled here as of now */
		return 0;
	}

	/* STDERRLOG_MSTADDR Stores the NTTP master address. */
	masterid = (readl_relaxed(l3_targ_mstaddr) &
		    l3->mst_addr_mask) >> __ffs(l3->mst_addr_mask);

	for (k = 0, master = l3->l3_masters; k < l3->num_masters;
	     k++, master++) {
		if (masterid == master->id) {
			master_name = master->name;
			break;
		}
	}

	op_code = readl_relaxed(l3_targ_hdr) & 0x7;

	m_req_info = readl_relaxed(l3_targ_info) & 0xF;
	snprintf(info_string, sizeof(info_string),
		 ": %s in %s mode during %s access",
		 (m_req_info & BIT(0)) ? "Opcode Fetch" : "Data Access",
		 (m_req_info & BIT(1)) ? "Supervisor" : "User",
		 (m_req_info & BIT(3)) ? "Debug" : "Functional");

	WARN(true,
	     "%s:L3 %s Error: MASTER %s TARGET %s (%s)%s%s\n",
	     dev_name(l3->dev),
	     err_description,
	     master_name, target_name,
	     l3_transaction_type[op_code],
	     err_string, info_string);

	/* clear the std error log*/
	clear = std_err_main | CLEAR_STDERR_LOG;
	writel_relaxed(clear, l3_targ_stderr);

	return 0;
}