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- #include <linux/module.h>
- #include <linux/init.h>
- #include <linux/pci.h>
- #include <linux/pci_ids.h>
- #include <linux/edac.h>
- #include "edac_module.h"
- #define EDAC_MOD_STR "r82600_edac"
- #define r82600_printk(level, fmt, arg...) \
- edac_printk(level, "r82600", fmt, ##arg)
- #define r82600_mc_printk(mci, level, fmt, arg...) \
- edac_mc_chipset_printk(mci, level, "r82600", fmt, ##arg)
- #define R82600_NR_CSROWS 4
- #define R82600_NR_CHANS 1
- #define R82600_NR_DIMMS 4
- #define R82600_BRIDGE_ID 0x8200
- #define R82600_DRAMC 0x57
- #define R82600_SDRAMC 0x76
- #define R82600_EAP 0x80
- #define R82600_DRBA 0x60
- struct r82600_error_info {
- u32 eapr;
- };
- static bool disable_hardware_scrub;
- static struct edac_pci_ctl_info *r82600_pci;
- static void r82600_get_error_info(struct mem_ctl_info *mci,
- struct r82600_error_info *info)
- {
- struct pci_dev *pdev;
- pdev = to_pci_dev(mci->pdev);
- pci_read_config_dword(pdev, R82600_EAP, &info->eapr);
- if (info->eapr & BIT(0))
-
- pci_write_bits32(pdev, R82600_EAP,
- ((u32) BIT(0) & (u32) BIT(1)),
- ((u32) BIT(0) & (u32) BIT(1)));
- if (info->eapr & BIT(1))
-
- pci_write_bits32(pdev, R82600_EAP,
- ((u32) BIT(0) & (u32) BIT(1)),
- ((u32) BIT(0) & (u32) BIT(1)));
- }
- static int r82600_process_error_info(struct mem_ctl_info *mci,
- struct r82600_error_info *info,
- int handle_errors)
- {
- int error_found;
- u32 eapaddr, page;
- u32 syndrome;
- error_found = 0;
-
- eapaddr = ((info->eapr >> 12) & 0x7FFF) << 13;
-
- syndrome = (info->eapr >> 4) & 0xFF;
-
- page = eapaddr >> PAGE_SHIFT;
- if (info->eapr & BIT(0)) {
- error_found = 1;
- if (handle_errors)
- edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, 1,
- page, 0, syndrome,
- edac_mc_find_csrow_by_page(mci, page),
- 0, -1,
- mci->ctl_name, "");
- }
- if (info->eapr & BIT(1)) {
- error_found = 1;
- if (handle_errors)
-
- edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, 1,
- page, 0, 0,
- edac_mc_find_csrow_by_page(mci, page),
- 0, -1,
- mci->ctl_name, "");
- }
- return error_found;
- }
- static void r82600_check(struct mem_ctl_info *mci)
- {
- struct r82600_error_info info;
- r82600_get_error_info(mci, &info);
- r82600_process_error_info(mci, &info, 1);
- }
- static inline int ecc_enabled(u8 dramcr)
- {
- return dramcr & BIT(5);
- }
- static void r82600_init_csrows(struct mem_ctl_info *mci, struct pci_dev *pdev,
- u8 dramcr)
- {
- struct csrow_info *csrow;
- struct dimm_info *dimm;
- int index;
- u8 drbar;
- u32 row_high_limit, row_high_limit_last;
- u32 reg_sdram, ecc_on, row_base;
- ecc_on = ecc_enabled(dramcr);
- reg_sdram = dramcr & BIT(4);
- row_high_limit_last = 0;
- for (index = 0; index < mci->nr_csrows; index++) {
- csrow = mci->csrows[index];
- dimm = csrow->channels[0]->dimm;
-
- pci_read_config_byte(pdev, R82600_DRBA + index, &drbar);
- edac_dbg(1, "Row=%d DRBA = %#0x\n", index, drbar);
- row_high_limit = ((u32) drbar << 24);
- edac_dbg(1, "Row=%d, Boundary Address=%#0x, Last = %#0x\n",
- index, row_high_limit, row_high_limit_last);
-
- if (row_high_limit == row_high_limit_last)
- continue;
- row_base = row_high_limit_last;
- csrow->first_page = row_base >> PAGE_SHIFT;
- csrow->last_page = (row_high_limit >> PAGE_SHIFT) - 1;
- dimm->nr_pages = csrow->last_page - csrow->first_page + 1;
-
- dimm->grain = 1 << 14;
- dimm->mtype = reg_sdram ? MEM_RDDR : MEM_DDR;
-
- dimm->dtype = DEV_UNKNOWN;
-
- dimm->edac_mode = ecc_on ? EDAC_SECDED : EDAC_NONE;
- row_high_limit_last = row_high_limit;
- }
- }
- static int r82600_probe1(struct pci_dev *pdev, int dev_idx)
- {
- struct mem_ctl_info *mci;
- struct edac_mc_layer layers[2];
- u8 dramcr;
- u32 eapr;
- u32 scrub_disabled;
- u32 sdram_refresh_rate;
- struct r82600_error_info discard;
- edac_dbg(0, "\n");
- pci_read_config_byte(pdev, R82600_DRAMC, &dramcr);
- pci_read_config_dword(pdev, R82600_EAP, &eapr);
- scrub_disabled = eapr & BIT(31);
- sdram_refresh_rate = dramcr & (BIT(0) | BIT(1));
- edac_dbg(2, "sdram refresh rate = %#0x\n", sdram_refresh_rate);
- edac_dbg(2, "DRAMC register = %#0x\n", dramcr);
- layers[0].type = EDAC_MC_LAYER_CHIP_SELECT;
- layers[0].size = R82600_NR_CSROWS;
- layers[0].is_virt_csrow = true;
- layers[1].type = EDAC_MC_LAYER_CHANNEL;
- layers[1].size = R82600_NR_CHANS;
- layers[1].is_virt_csrow = false;
- mci = edac_mc_alloc(0, ARRAY_SIZE(layers), layers, 0);
- if (mci == NULL)
- return -ENOMEM;
- edac_dbg(0, "mci = %p\n", mci);
- mci->pdev = &pdev->dev;
- mci->mtype_cap = MEM_FLAG_RDDR | MEM_FLAG_DDR;
- mci->edac_ctl_cap = EDAC_FLAG_NONE | EDAC_FLAG_EC | EDAC_FLAG_SECDED;
-
-
- mci->edac_cap = EDAC_FLAG_NONE | EDAC_FLAG_EC | EDAC_FLAG_SECDED;
- if (ecc_enabled(dramcr)) {
- if (scrub_disabled)
- edac_dbg(3, "mci = %p - Scrubbing disabled! EAP: %#0x\n",
- mci, eapr);
- } else
- mci->edac_cap = EDAC_FLAG_NONE;
- mci->mod_name = EDAC_MOD_STR;
- mci->ctl_name = "R82600";
- mci->dev_name = pci_name(pdev);
- mci->edac_check = r82600_check;
- mci->ctl_page_to_phys = NULL;
- r82600_init_csrows(mci, pdev, dramcr);
- r82600_get_error_info(mci, &discard);
-
- if (edac_mc_add_mc(mci)) {
- edac_dbg(3, "failed edac_mc_add_mc()\n");
- goto fail;
- }
-
- if (disable_hardware_scrub) {
- edac_dbg(3, "Disabling Hardware Scrub (scrub on error)\n");
- pci_write_bits32(pdev, R82600_EAP, BIT(31), BIT(31));
- }
-
- r82600_pci = edac_pci_create_generic_ctl(&pdev->dev, EDAC_MOD_STR);
- if (!r82600_pci) {
- printk(KERN_WARNING
- "%s(): Unable to create PCI control\n",
- __func__);
- printk(KERN_WARNING
- "%s(): PCI error report via EDAC not setup\n",
- __func__);
- }
- edac_dbg(3, "success\n");
- return 0;
- fail:
- edac_mc_free(mci);
- return -ENODEV;
- }
- static int r82600_init_one(struct pci_dev *pdev,
- const struct pci_device_id *ent)
- {
- edac_dbg(0, "\n");
-
- return r82600_probe1(pdev, ent->driver_data);
- }
- static void r82600_remove_one(struct pci_dev *pdev)
- {
- struct mem_ctl_info *mci;
- edac_dbg(0, "\n");
- if (r82600_pci)
- edac_pci_release_generic_ctl(r82600_pci);
- if ((mci = edac_mc_del_mc(&pdev->dev)) == NULL)
- return;
- edac_mc_free(mci);
- }
- static const struct pci_device_id r82600_pci_tbl[] = {
- {
- PCI_DEVICE(PCI_VENDOR_ID_RADISYS, R82600_BRIDGE_ID)
- },
- {
- 0,
- }
- };
- MODULE_DEVICE_TABLE(pci, r82600_pci_tbl);
- static struct pci_driver r82600_driver = {
- .name = EDAC_MOD_STR,
- .probe = r82600_init_one,
- .remove = r82600_remove_one,
- .id_table = r82600_pci_tbl,
- };
- static int __init r82600_init(void)
- {
-
- opstate_init();
- return pci_register_driver(&r82600_driver);
- }
- static void __exit r82600_exit(void)
- {
- pci_unregister_driver(&r82600_driver);
- }
- module_init(r82600_init);
- module_exit(r82600_exit);
- MODULE_LICENSE("GPL");
- MODULE_AUTHOR("Tim Small <tim@buttersideup.com> - WPAD Ltd. "
- "on behalf of EADS Astrium");
- MODULE_DESCRIPTION("MC support for Radisys 82600 memory controllers");
- module_param(disable_hardware_scrub, bool, 0644);
- MODULE_PARM_DESC(disable_hardware_scrub,
- "If set, disable the chipset's automatic scrub for CEs");
- module_param(edac_op_state, int, 0444);
- MODULE_PARM_DESC(edac_op_state, "EDAC Error Reporting state: 0=Poll,1=NMI");
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