1 // SPDX-License-Identifier: GPL-2.0
3  * Bluefield-specific EDAC driver.
9 #include <linux/arm-smccc.h>
18 #define DRIVER_NAME		"bluefield-edac"
21  * Mellanox BlueField EMI (External Memory Interface) register definitions.
57  * a1: (Memory controller index) << 16 | (Dimm index in memory controller)
58  * a2-7: not used.
62  * a1-3: not used.
66 /* Format for the SMC response about the memory information */
90  * Gather the ECC information from the External Memory Interface registers
97 	struct bluefield_edac_priv *priv = mci->pvt_info;  in bluefield_gather_report_ecc()
108 	 * Tell the External Memory Interface to populate the relevant  in bluefield_gather_report_ecc()
112 	writel(ecc_latch_select, priv->emi_base + MLXBF_ECC_LATCH_SEL);  in bluefield_gather_report_ecc()
119 	dram_syndrom = readl(priv->emi_base + MLXBF_SYNDROM);  in bluefield_gather_report_ecc()
126 				     0, 0, -1, mci->ctl_name, "");  in bluefield_gather_report_ecc()
130 	dram_additional_info = readl(priv->emi_base + MLXBF_ADD_INFO);  in bluefield_gather_report_ecc()
133 	ecc_dimm = (err_prank >= 2 && priv->dimm_ranks[0] <= 2) ? 1 : 0;  in bluefield_gather_report_ecc()
135 	edea0 = readl(priv->emi_base + MLXBF_ERR_ADDR_0);  in bluefield_gather_report_ecc()
136 	edea1 = readl(priv->emi_base + MLXBF_ERR_ADDR_1);  in bluefield_gather_report_ecc()
143 			     syndrom, ecc_dimm, 0, 0, mci->ctl_name, "");  in bluefield_gather_report_ecc()
148 	struct bluefield_edac_priv *priv = mci->pvt_info;  in bluefield_edac_check()
152 	 * The memory controller might not be initialized by the firmware  in bluefield_edac_check()
153 	 * when there isn't memory, which may lead to bad register readings.  in bluefield_edac_check()
155 	if (mci->edac_cap == EDAC_FLAG_NONE)  in bluefield_edac_check()
158 	ecc_count = readl(priv->emi_base + MLXBF_ECC_CNT);  in bluefield_edac_check()
176 		writel(ecc_error, priv->emi_base + MLXBF_ECC_ERR);  in bluefield_edac_check()
179 /* Initialize the DIMMs information for the given memory controller. */
182 	struct bluefield_edac_priv *priv = mci->pvt_info;  in bluefield_edac_init_dimms()
183 	int mem_ctrl_idx = mci->mc_idx;  in bluefield_edac_init_dimms()
188 	for (i = 0; i < priv->dimm_per_mc; i++) {  in bluefield_edac_init_dimms()
189 		dimm = mci->dimms[i];  in bluefield_edac_init_dimms()
195 			dimm->mtype = MEM_EMPTY;  in bluefield_edac_init_dimms()
201 		dimm->edac_mode = EDAC_SECDED;  in bluefield_edac_init_dimms()
204 			dimm->mtype = MEM_NVDIMM;  in bluefield_edac_init_dimms()
206 			dimm->mtype = MEM_LRDDR4;  in bluefield_edac_init_dimms()
208 			dimm->mtype = MEM_RDDR4;  in bluefield_edac_init_dimms()
210 			dimm->mtype = MEM_DDR4;  in bluefield_edac_init_dimms()
212 		dimm->nr_pages =  in bluefield_edac_init_dimms()
215 		dimm->grain = MLXBF_EDAC_ERROR_GRAIN;  in bluefield_edac_init_dimms()
217 		/* Mem controller for BlueField only supports x4, x8 and x16 */  in bluefield_edac_init_dimms()
220 			dimm->dtype = DEV_X4;  in bluefield_edac_init_dimms()
223 			dimm->dtype = DEV_X8;  in bluefield_edac_init_dimms()
226 			dimm->dtype = DEV_X16;  in bluefield_edac_init_dimms()
229 			dimm->dtype = DEV_UNKNOWN;  in bluefield_edac_init_dimms()
232 		priv->dimm_ranks[i] =  in bluefield_edac_init_dimms()
237 		mci->edac_cap = EDAC_FLAG_NONE;  in bluefield_edac_init_dimms()
239 		mci->edac_cap = EDAC_FLAG_SECDED;  in bluefield_edac_init_dimms()
245 	struct device *dev = &pdev->dev;  in bluefield_edac_mc_probe()
252 	/* Read the MSS (Memory SubSystem) index from ACPI table. */  in bluefield_edac_mc_probe()
255 		return -EINVAL;  in bluefield_edac_mc_probe()
261 		return -EINVAL;  in bluefield_edac_mc_probe()
266 		return -EINVAL;  in bluefield_edac_mc_probe()
271 		return -EINVAL;  in bluefield_edac_mc_probe()
279 		return -ENOMEM;  in bluefield_edac_mc_probe()
281 	priv = mci->pvt_info;  in bluefield_edac_mc_probe()
283 	priv->dimm_per_mc = dimm_count;  in bluefield_edac_mc_probe()
284 	priv->emi_base = devm_ioremap_resource(dev, emi_res);  in bluefield_edac_mc_probe()
285 	if (IS_ERR(priv->emi_base)) {  in bluefield_edac_mc_probe()
287 		ret = PTR_ERR(priv->emi_base);  in bluefield_edac_mc_probe()
291 	mci->pdev = dev;  in bluefield_edac_mc_probe()
292 	mci->mtype_cap = MEM_FLAG_DDR4 | MEM_FLAG_RDDR4 |  in bluefield_edac_mc_probe()
294 	mci->edac_ctl_cap = EDAC_FLAG_SECDED;  in bluefield_edac_mc_probe()
296 	mci->mod_name = DRIVER_NAME;  in bluefield_edac_mc_probe()
297 	mci->ctl_name = "BlueField_Memory_Controller";  in bluefield_edac_mc_probe()
298 	mci->dev_name = dev_name(dev);  in bluefield_edac_mc_probe()
299 	mci->edac_check = bluefield_edac_check;  in bluefield_edac_mc_probe()
330 	edac_mc_del_mc(&pdev->dev);  in bluefield_edac_mc_remove()
352 MODULE_DESCRIPTION("Mellanox BlueField memory edac driver");