sb_edac: convert driver to use the new edac ABI

The legacy edac ABI is going to be removed. Port the driver to use
and benefit from the new API functionality.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 56 insertions, 103 deletions

diff --git a/drivers/edac/sb_edac.c b/drivers/edac/sb_edac.c
index 2ce9bf5e354b..828647969124 100644
--- a/drivers/edac/sb_edac.c
+++ b/drivers/edac/sb_edac.c
@@ -314,8 +314,6 @@ struct sbridge_pvt {
         struct sbridge_info     info;
         struct sbridge_channel  channel[NUM_CHANNELS];
 
-        int                     csrow_map[NUM_CHANNELS][MAX_DIMMS];
-
         /* Memory type detection */
         bool                    is_mirrored, is_lockstep, is_close_pg;
 
@@ -487,29 +485,14 @@ static struct pci_dev *get_pdev_slot_func(u8 bus, unsigned slot,
 }
 
 /**
- * sbridge_get_active_channels() - gets the number of channels and csrows
+ * check_if_ecc_is_active() - Checks if ECC is active
  * bus:         Device bus
- * @channels:   Number of channels that will be returned
- * @csrows:     Number of csrows found
- *
- * Since EDAC core needs to know in advance the number of available channels
- * and csrows, in order to allocate memory for csrows/channels, it is needed
- * to run two similar steps. At the first step, implemented on this function,
- * it checks the number of csrows/channels present at one socket, identified
- * by the associated PCI bus.
- * this is used in order to properly allocate the size of mci components.
- * Note: one csrow is one dimm.
  */
-static int sbridge_get_active_channels(const u8 bus, unsigned *channels,
-                                      unsigned *csrows)
+static int check_if_ecc_is_active(const u8 bus)
 {
         struct pci_dev *pdev = NULL;
-        int i, j;
         u32 mcmtr;
 
-        *channels = 0;
-        *csrows = 0;
-
         pdev = get_pdev_slot_func(bus, 15, 0);
         if (!pdev) {
                 sbridge_printk(KERN_ERR, "Couldn't find PCI device "
@@ -523,41 +506,14 @@ static int sbridge_get_active_channels(const u8 bus, unsigned *channels,
                 sbridge_printk(KERN_ERR, "ECC is disabled. Aborting\n");
                 return -ENODEV;
         }
-
-        for (i = 0; i < NUM_CHANNELS; i++) {
-                u32 mtr;
-
-                /* Device 15 functions 2 - 5  */
-                pdev = get_pdev_slot_func(bus, 15, 2 + i);
-                if (!pdev) {
-                        sbridge_printk(KERN_ERR, "Couldn't find PCI device "
-                                                 "%2x.%02d.%d!!!\n",
-                                                 bus, 15, 2 + i);
-                        return -ENODEV;
-                }
-                (*channels)++;
-
-                for (j = 0; j < ARRAY_SIZE(mtr_regs); j++) {
-                        pci_read_config_dword(pdev, mtr_regs[j], &mtr);
-                        debugf1("Bus#%02x channel #%d  MTR%d = %x\n", bus, i, j, mtr);
-                        if (IS_DIMM_PRESENT(mtr))
-                                (*csrows)++;
-                }
-        }
-
-        debugf0("Number of active channels: %d, number of active dimms: %d\n",
-                *channels, *csrows);
-
         return 0;
 }
 
 static int get_dimm_config(struct mem_ctl_info *mci)
 {
         struct sbridge_pvt *pvt = mci->pvt_info;
-        struct csrow_info *csr;
+        struct dimm_info *dimm;
         int i, j, banks, ranks, rows, cols, size, npages;
-        int csrow = 0;
-        unsigned long last_page = 0;
         u32 reg;
         enum edac_type mode;
         enum mem_type mtype;
@@ -616,7 +572,8 @@ static int get_dimm_config(struct mem_ctl_info *mci)
                 u32 mtr;
 
                 for (j = 0; j < ARRAY_SIZE(mtr_regs); j++) {
-                        struct dimm_info *dimm = &mci->dimms[j];
+                        dimm = EDAC_DIMM_PTR(mci->layers, mci->dimms, mci->n_layers,
+                                       i, j, 0);
                         pci_read_config_dword(pvt->pci_tad[i],
                                               mtr_regs[j], &mtr);
                         debugf4("Channel #%d  MTR%d = %x\n", i, j, mtr);
@@ -636,16 +593,6 @@ static int get_dimm_config(struct mem_ctl_info *mci)
                                         size, npages,
                                         banks, ranks, rows, cols);
 
-                                /*
-                                 * Fake stuff. This controller doesn't see
-                                 * csrows.
-                                 */
-                                csr = &mci->csrows[csrow];
-                                pvt->csrow_map[i][j] = csrow;
-                                last_page += npages;
-                                csrow++;
-
-                                csr->channels[0].dimm = dimm;
                                 dimm->nr_pages = npages;
                                 dimm->grain = 32;
                                 dimm->dtype = (banks == 8) ? DEV_X8 : DEV_X4;
@@ -841,11 +788,10 @@ static int get_memory_error_data(struct mem_ctl_info *mci,
                                  u8 *socket,
                                  long *channel_mask,
                                  u8 *rank,
-                                 char *area_type)
+                                 char *area_type, char *msg)
 {
         struct mem_ctl_info     *new_mci;
         struct sbridge_pvt *pvt = mci->pvt_info;
-        char                    msg[256];
         int                     n_rir, n_sads, n_tads, sad_way, sck_xch;
         int                     sad_interl, idx, base_ch;
         int                     interleave_mode;
@@ -867,12 +813,10 @@ static int get_memory_error_data(struct mem_ctl_info *mci,
          */
         if ((addr > (u64) pvt->tolm) && (addr < (1LL << 32))) {
                 sprintf(msg, "Error at TOLM area, on addr 0x%08Lx", addr);
-                edac_mc_handle_ce_no_info(mci, msg);
                 return -EINVAL;
         }
         if (addr >= (u64)pvt->tohm) {
                 sprintf(msg, "Error at MMIOH area, on addr 0x%016Lx", addr);
-                edac_mc_handle_ce_no_info(mci, msg);
                 return -EINVAL;
         }
 
@@ -889,7 +833,6 @@ static int get_memory_error_data(struct mem_ctl_info *mci,
                 limit = SAD_LIMIT(reg);
                 if (limit <= prv) {
                         sprintf(msg, "Can't discover the memory socket");
-                        edac_mc_handle_ce_no_info(mci, msg);
                         return -EINVAL;
                 }
                 if  (addr <= limit)
@@ -898,7 +841,6 @@ static int get_memory_error_data(struct mem_ctl_info *mci,
         }
         if (n_sads == MAX_SAD) {
                 sprintf(msg, "Can't discover the memory socket");
-                edac_mc_handle_ce_no_info(mci, msg);
                 return -EINVAL;
         }
         area_type = get_dram_attr(reg);
@@ -939,7 +881,6 @@ static int get_memory_error_data(struct mem_ctl_info *mci,
                 break;
         default:
                 sprintf(msg, "Can't discover socket interleave");
-                edac_mc_handle_ce_no_info(mci, msg);
                 return -EINVAL;
         }
         *socket = sad_interleave[idx];
@@ -954,7 +895,6 @@ static int get_memory_error_data(struct mem_ctl_info *mci,
         if (!new_mci) {
                 sprintf(msg, "Struct for socket #%u wasn't initialized",
                         *socket);
-                edac_mc_handle_ce_no_info(mci, msg);
                 return -EINVAL;
         }
         mci = new_mci;
@@ -970,7 +910,6 @@ static int get_memory_error_data(struct mem_ctl_info *mci,
                 limit = TAD_LIMIT(reg);
                 if (limit <= prv) {
                         sprintf(msg, "Can't discover the memory channel");
-                        edac_mc_handle_ce_no_info(mci, msg);
                         return -EINVAL;
                 }
                 if  (addr <= limit)
@@ -1010,7 +949,6 @@ static int get_memory_error_data(struct mem_ctl_info *mci,
                 break;
         default:
                 sprintf(msg, "Can't discover the TAD target");
-                edac_mc_handle_ce_no_info(mci, msg);
                 return -EINVAL;
         }
         *channel_mask = 1 << base_ch;
@@ -1024,7 +962,6 @@ static int get_memory_error_data(struct mem_ctl_info *mci,
                         break;
                 default:
                         sprintf(msg, "Invalid mirror set. Can't decode addr");
-                        edac_mc_handle_ce_no_info(mci, msg);
                         return -EINVAL;
                 }
         } else
@@ -1052,7 +989,6 @@ static int get_memory_error_data(struct mem_ctl_info *mci,
         if (offset > addr) {
                 sprintf(msg, "Can't calculate ch addr: TAD offset 0x%08Lx is too high for addr 0x%08Lx!",
                         offset, addr);
-                edac_mc_handle_ce_no_info(mci, msg);
                 return -EINVAL;
         }
         addr -= offset;
@@ -1092,7 +1028,6 @@ static int get_memory_error_data(struct mem_ctl_info *mci,
         if (n_rir == MAX_RIR_RANGES) {
                 sprintf(msg, "Can't discover the memory rank for ch addr 0x%08Lx",
                         ch_addr);
-                edac_mc_handle_ce_no_info(mci, msg);
                 return -EINVAL;
         }
         rir_way = RIR_WAY(reg);
@@ -1406,7 +1341,8 @@ static void sbridge_mce_output_error(struct mem_ctl_info *mci,
 {
         struct mem_ctl_info *new_mci;
         struct sbridge_pvt *pvt = mci->pvt_info;
-        char *type, *optype, *msg, *recoverable_msg;
+        enum hw_event_mc_err_type tp_event;
+        char *type, *optype, msg[256], *recoverable_msg;
         bool ripv = GET_BITFIELD(m->mcgstatus, 0, 0);
         bool overflow = GET_BITFIELD(m->status, 62, 62);
         bool uncorrected_error = GET_BITFIELD(m->status, 61, 61);
@@ -1418,13 +1354,21 @@ static void sbridge_mce_output_error(struct mem_ctl_info *mci,
         u32 optypenum = GET_BITFIELD(m->status, 4, 6);
         long channel_mask, first_channel;
         u8  rank, socket;
-        int csrow, rc, dimm;
+        int rc, dimm;
         char *area_type = "Unknown";
 
-        if (ripv)
-                type = "NON_FATAL";
-        else
-                type = "FATAL";
+        if (uncorrected_error) {
+                if (ripv) {
+                        type = "FATAL";
+                        tp_event = HW_EVENT_ERR_FATAL;
+                } else {
+                        type = "NON_FATAL";
+                        tp_event = HW_EVENT_ERR_UNCORRECTED;
+                }
+        } else {
+                type = "CORRECTED";
+                tp_event = HW_EVENT_ERR_CORRECTED;
+        }
 
         /*
          * According with Table 15-9 of the Intel Archictecture spec vol 3A,
@@ -1442,19 +1386,19 @@ static void sbridge_mce_output_error(struct mem_ctl_info *mci,
         } else {
                 switch (optypenum) {
                 case 0:
-                        optype = "generic undef request";
+                        optype = "generic undef request error";
                         break;
                 case 1:
-                        optype = "memory read";
+                        optype = "memory read error";
                         break;
                 case 2:
-                        optype = "memory write";
+                        optype = "memory write error";
                         break;
                 case 3:
-                        optype = "addr/cmd";
+                        optype = "addr/cmd error";
                         break;
                 case 4:
-                        optype = "memory scrubbing";
+                        optype = "memory scrubbing error";
                         break;
                 default:
                         optype = "reserved";
@@ -1463,13 +1407,13 @@ static void sbridge_mce_output_error(struct mem_ctl_info *mci,
         }
 
         rc = get_memory_error_data(mci, m->addr, &socket,
-                                   &channel_mask, &rank, area_type);
+                                   &channel_mask, &rank, area_type, msg);
         if (rc < 0)
-                return;
+                goto err_parsing;
         new_mci = get_mci_for_node_id(socket);
         if (!new_mci) {
-                edac_mc_handle_ce_no_info(mci, "Error: socket got corrupted!");
-                return;
+                strcpy(msg, "Error: socket got corrupted!");
+                goto err_parsing;
         }
         mci = new_mci;
         pvt = mci->pvt_info;
@@ -1483,8 +1427,6 @@ static void sbridge_mce_output_error(struct mem_ctl_info *mci,
         else
                 dimm = 2;
 
-        csrow = pvt->csrow_map[first_channel][dimm];
-
         if (uncorrected_error && recoverable)
                 recoverable_msg = " recoverable";
         else
@@ -1495,18 +1437,14 @@ static void sbridge_mce_output_error(struct mem_ctl_info *mci,
          * Probably, we can just discard it, as the channel information
          * comes from the get_memory_error_data() address decoding
          */
-        msg = kasprintf(GFP_ATOMIC,
-                        "%d %s error(s): %s on %s area %s%s: cpu=%d Err=%04x:%04x (ch=%d), "
-                        "addr = 0x%08llx => socket=%d, Channel=%ld(mask=%ld), rank=%d\n",
+        snprintf(msg, sizeof(msg),
+                        "%d error(s)%s: %s%s: cpu=%d Err=%04x:%04x addr = 0x%08llx socket=%d Channel=%ld(mask=%ld), rank=%d\n",
                         core_err_cnt,
+                        overflow ? " OVERFLOW" : "",
                         area_type,
-                        optype,
-                        type,
                         recoverable_msg,
-                        overflow ? "OVERFLOW" : "",
                         m->cpu,
                         mscod, errcode,
-                        channel,                /* 1111b means not specified */
                         (long long) m->addr,
                         socket,
                         first_channel,          /* This is the real channel on SB */
@@ -1515,13 +1453,19 @@ static void sbridge_mce_output_error(struct mem_ctl_info *mci,
 
         debugf0("%s", msg);
 
+        /* FIXME: need support for channel mask */
+
         /* Call the helper to output message */
-        if (uncorrected_error)
-                edac_mc_handle_fbd_ue(mci, csrow, 0, 0, msg);
-        else
-                edac_mc_handle_fbd_ce(mci, csrow, 0, msg);
+        edac_mc_handle_error(tp_event, mci,
+                             m->addr >> PAGE_SHIFT, m->addr & ~PAGE_MASK, 0,
+                             channel, dimm, -1,
+                             optype, msg, m);
+        return;
+err_parsing:
+        edac_mc_handle_error(tp_event, mci, 0, 0, 0,
+                             -1, -1, -1,
+                             msg, "", m);
 
-        kfree(msg);
 }
 
 /*
@@ -1680,16 +1624,25 @@ static void sbridge_unregister_mci(struct sbridge_dev *sbridge_dev)
 static int sbridge_register_mci(struct sbridge_dev *sbridge_dev)
 {
         struct mem_ctl_info *mci;
+        struct edac_mc_layer layers[2];
         struct sbridge_pvt *pvt;
-        int rc, channels, csrows;
+        int rc;
 
         /* Check the number of active and not disabled channels */
-        rc = sbridge_get_active_channels(sbridge_dev->bus, &channels, &csrows);
+        rc = check_if_ecc_is_active(sbridge_dev->bus);
         if (unlikely(rc < 0))
                 return rc;
 
         /* allocate a new MC control structure */
-        mci = edac_mc_alloc(sizeof(*pvt), csrows, channels, sbridge_dev->mc);
+        layers[0].type = EDAC_MC_LAYER_CHANNEL;
+        layers[0].size = NUM_CHANNELS;
+        layers[0].is_virt_csrow = false;
+        layers[1].type = EDAC_MC_LAYER_SLOT;
+        layers[1].size = MAX_DIMMS;
+        layers[1].is_virt_csrow = true;
+        mci = new_edac_mc_alloc(sbridge_dev->mc, ARRAY_SIZE(layers), layers,
+                            sizeof(*pvt));
+
         if (unlikely(!mci))
                 return -ENOMEM;