sparc64: Add JBUS UltraSPARC-IIIi support to memory controller driver.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 453 insertions, 83 deletions

diff --git a/arch/sparc64/kernel/chmc.c b/arch/sparc64/kernel/chmc.c
index a3c79fd5dd31..3e14952e9407 100644
--- a/arch/sparc64/kernel/chmc.c
+++ b/arch/sparc64/kernel/chmc.c
@@ -33,6 +33,12 @@ MODULE_DESCRIPTION("UltraSPARC-III memory controller driver");
 MODULE_LICENSE("GPL");
 MODULE_VERSION(DRV_MODULE_VERSION);
 
+static int mc_type;
+#define MC_TYPE_SAFARI          1
+#define MC_TYPE_JBUS            2
+
+static dimm_printer_t us3mc_dimm_printer;
+
 #define CHMCTRL_NDGRPS  2
 #define CHMCTRL_NDIMMS  4
 
@@ -96,8 +102,386 @@ struct chmc {
         struct chmc_bank_info           logical_banks[CHMCTRL_NBANKS];
 };
 
+#define JBUSMC_REGS_SIZE                8
+
+#define JB_MC_REG1_DIMM2_BANK3          0x8000000000000000
+#define JB_MC_REG1_DIMM1_BANK1          0x4000000000000000
+#define JB_MC_REG1_DIMM2_BANK2          0x2000000000000000
+#define JB_MC_REG1_DIMM1_BANK0          0x1000000000000000
+#define JB_MC_REG1_XOR                  0x0000010000000000
+#define JB_MC_REG1_ADDR_GEN_2           0x000000e000000000
+#define JB_MC_REG1_ADDR_GEN_2_SHIFT     37
+#define JB_MC_REG1_ADDR_GEN_1           0x0000001c00000000
+#define JB_MC_REG1_ADDR_GEN_1_SHIFT     34
+#define JB_MC_REG1_INTERLEAVE           0x0000000001800000
+#define JB_MC_REG1_INTERLEAVE_SHIFT     23
+#define JB_MC_REG1_DIMM2_PTYPE          0x0000000000200000
+#define JB_MC_REG1_DIMM2_PTYPE_SHIFT    21
+#define JB_MC_REG1_DIMM1_PTYPE          0x0000000000100000
+#define JB_MC_REG1_DIMM1_PTYPE_SHIFT    20
+
+#define PART_TYPE_X8            0
+#define PART_TYPE_X4            1
+
+#define INTERLEAVE_NONE         0
+#define INTERLEAVE_SAME         1
+#define INTERLEAVE_INTERNAL     2
+#define INTERLEAVE_BOTH         3
+
+#define ADDR_GEN_128MB          0
+#define ADDR_GEN_256MB          1
+#define ADDR_GEN_512MB          2
+#define ADDR_GEN_1GB            3
+
+#define JB_NUM_DIMM_GROUPS      2
+#define JB_NUM_DIMMS_PER_GROUP  2
+#define JB_NUM_DIMMS            (JB_NUM_DIMM_GROUPS * JB_NUM_DIMMS_PER_GROUP)
+
+struct jbusmc_obp_map {
+        unsigned char   dimm_map[18];
+        unsigned char   pin_map[144];
+};
+
+struct jbusmc_obp_mem_layout {
+        /* One max 8-byte string label per DIMM.  Usually
+         * this matches the label on the motherboard where
+         * that DIMM resides.
+         */
+        char            dimm_labels[JB_NUM_DIMMS][DIMM_LABEL_SZ];
+
+        /* If symmetric use map[0], else it is
+         * asymmetric and map[1] should be used.
+         */
+        char                    symmetric;
+
+        struct jbusmc_obp_map   map;
+
+        char                    _pad;
+};
+
+struct jbusmc_dimm_group {
+        struct jbusmc                   *controller;
+        int                             index;
+        u64                             base_addr;
+        u64                             size;
+};
+
+struct jbusmc {
+        void __iomem                    *regs;
+        u64                             mc_reg_1;
+        u32                             portid;
+        struct jbusmc_obp_mem_layout    layout;
+        int                             layout_len;
+        int                             num_dimm_groups;
+        struct jbusmc_dimm_group        dimm_groups[JB_NUM_DIMM_GROUPS];
+        struct list_head                list;
+};
+
+static DEFINE_SPINLOCK(mctrl_list_lock);
 static LIST_HEAD(mctrl_list);
 
+static void mc_list_add(struct list_head *list)
+{
+        spin_lock(&mctrl_list_lock);
+        list_add(list, &mctrl_list);
+        spin_unlock(&mctrl_list_lock);
+}
+
+static void mc_list_del(struct list_head *list)
+{
+        spin_lock(&mctrl_list_lock);
+        list_del_init(list);
+        spin_unlock(&mctrl_list_lock);
+}
+
+#define SYNDROME_MIN    -1
+#define SYNDROME_MAX    144
+
+/* Covert syndrome code into the way the bits are positioned
+ * on the bus.
+ */
+static int syndrome_to_qword_code(int syndrome_code)
+{
+        if (syndrome_code < 128)
+                syndrome_code += 16;
+        else if (syndrome_code < 128 + 9)
+                syndrome_code -= (128 - 7);
+        else if (syndrome_code < (128 + 9 + 3))
+                syndrome_code -= (128 + 9 - 4);
+        else
+                syndrome_code -= (128 + 9 + 3);
+        return syndrome_code;
+}
+
+/* All this magic has to do with how a cache line comes over the wire
+ * on Safari and JBUS.  A 64-bit line comes over in 1 or more quadword
+ * cycles, each of which transmit ECC/MTAG info as well as the actual
+ * data.
+ */
+#define L2_LINE_SIZE            64
+#define L2_LINE_ADDR_MSK        (L2_LINE_SIZE - 1)
+#define QW_PER_LINE             4
+#define QW_BYTES                (L2_LINE_SIZE / QW_PER_LINE)
+#define QW_BITS                 144
+#define SAFARI_LAST_BIT         (576 - 1)
+#define JBUS_LAST_BIT           (144 - 1)
+
+static void get_pin_and_dimm_str(int syndrome_code, unsigned long paddr,
+                                 int *pin_p, char **dimm_str_p, void *_prop,
+                                 int base_dimm_offset)
+{
+        int qword_code = syndrome_to_qword_code(syndrome_code);
+        int cache_line_offset;
+        int offset_inverse;
+        int dimm_map_index;
+        int map_val;
+
+        if (mc_type == MC_TYPE_JBUS) {
+                struct jbusmc_obp_mem_layout *p = _prop;
+
+                /* JBUS */
+                cache_line_offset = qword_code;
+                offset_inverse = (JBUS_LAST_BIT - cache_line_offset);
+                dimm_map_index = offset_inverse / 8;
+                map_val = p->map.dimm_map[dimm_map_index];
+                map_val = ((map_val >> ((7 - (offset_inverse & 7)))) & 1);
+                *dimm_str_p = p->dimm_labels[base_dimm_offset + map_val];
+                *pin_p = p->map.pin_map[cache_line_offset];
+        } else {
+                struct chmc_obp_mem_layout *p = _prop;
+                struct chmc_obp_map *mp;
+                int qword;
+
+                /* Safari */
+                if (p->symmetric)
+                        mp = &p->map[0];
+                else
+                        mp = &p->map[1];
+
+                qword = (paddr & L2_LINE_ADDR_MSK) / QW_BYTES;
+                cache_line_offset = ((3 - qword) * QW_BITS) + qword_code;
+                offset_inverse = (SAFARI_LAST_BIT - cache_line_offset);
+                dimm_map_index = offset_inverse >> 2;
+                map_val = mp->dimm_map[dimm_map_index];
+                map_val = ((map_val >> ((3 - (offset_inverse & 3)) << 1)) & 0x3);
+                *dimm_str_p = p->dimm_labels[base_dimm_offset + map_val];
+                *pin_p = mp->pin_map[cache_line_offset];
+        }
+}
+
+static struct jbusmc_dimm_group *jbusmc_find_dimm_group(unsigned long phys_addr)
+{
+        struct jbusmc *p;
+
+        list_for_each_entry(p, &mctrl_list, list) {
+                int i;
+
+                for (i = 0; i < p->num_dimm_groups; i++) {
+                        struct jbusmc_dimm_group *dp = &p->dimm_groups[i];
+
+                        if (phys_addr < dp->base_addr ||
+                            (dp->base_addr + dp->size) <= phys_addr)
+                                continue;
+
+                        return dp;
+                }
+        }
+        return NULL;
+}
+
+static int jbusmc_print_dimm(int syndrome_code,
+                             unsigned long phys_addr,
+                             char *buf, int buflen)
+{
+        struct jbusmc_obp_mem_layout *prop;
+        struct jbusmc_dimm_group *dp;
+        struct jbusmc *p;
+        int first_dimm;
+
+        dp = jbusmc_find_dimm_group(phys_addr);
+        if (dp == NULL ||
+            syndrome_code < SYNDROME_MIN ||
+            syndrome_code > SYNDROME_MAX) {
+                buf[0] = '?';
+                buf[1] = '?';
+                buf[2] = '?';
+                buf[3] = '\0';
+        }
+        p = dp->controller;
+        prop = &p->layout;
+
+        first_dimm = dp->index * JB_NUM_DIMMS_PER_GROUP;
+
+        if (syndrome_code != SYNDROME_MIN) {
+                char *dimm_str;
+                int pin;
+
+                get_pin_and_dimm_str(syndrome_code, phys_addr, &pin,
+                                     &dimm_str, prop, first_dimm);
+                sprintf(buf, "%s, pin %3d", dimm_str, pin);
+        } else {
+                int dimm;
+
+                /* Multi-bit error, we just dump out all the
+                 * dimm labels associated with this dimm group.
+                 */
+                for (dimm = 0; dimm < JB_NUM_DIMMS_PER_GROUP; dimm++) {
+                        sprintf(buf, "%s ",
+                                prop->dimm_labels[first_dimm + dimm]);
+                        buf += strlen(buf);
+                }
+        }
+
+        return 0;
+}
+
+static u64 __devinit jbusmc_dimm_group_size(u64 base,
+                                            const struct linux_prom64_registers *mem_regs,
+                                            int num_mem_regs)
+{
+        u64 max = base + (8UL * 1024 * 1024 * 1024);
+        u64 max_seen = base;
+        int i;
+
+        for (i = 0; i < num_mem_regs; i++) {
+                const struct linux_prom64_registers *ent;
+                u64 this_base;
+                u64 this_end;
+
+                ent = &mem_regs[i];
+                this_base = ent->phys_addr;
+                this_end = this_base + ent->reg_size;
+                if (base < this_base || base >= this_end)
+                        continue;
+                if (this_end > max)
+                        this_end = max;
+                if (this_end > max_seen)
+                        max_seen = this_end;
+        }
+
+        return max_seen - base;
+}
+
+static void __devinit jbusmc_construct_one_dimm_group(struct jbusmc *p,
+                                                      unsigned long index,
+                                                      const struct linux_prom64_registers *mem_regs,
+                                                      int num_mem_regs)
+{
+        struct jbusmc_dimm_group *dp = &p->dimm_groups[index];
+
+        dp->controller = p;
+        dp->index = index;
+
+        dp->base_addr  = (p->portid * (64UL * 1024 * 1024 * 1024));
+        dp->base_addr += (index * (8UL * 1024 * 1024 * 1024));
+        dp->size = jbusmc_dimm_group_size(dp->base_addr, mem_regs, num_mem_regs);
+}
+
+static void __devinit jbusmc_construct_dimm_groups(struct jbusmc *p,
+                                                   const struct linux_prom64_registers *mem_regs,
+                                                   int num_mem_regs)
+{
+        if (p->mc_reg_1 & JB_MC_REG1_DIMM1_BANK0) {
+                jbusmc_construct_one_dimm_group(p, 0, mem_regs, num_mem_regs);
+                p->num_dimm_groups++;
+        }
+        if (p->mc_reg_1 & JB_MC_REG1_DIMM2_BANK2) {
+                jbusmc_construct_one_dimm_group(p, 1, mem_regs, num_mem_regs);
+                p->num_dimm_groups++;
+        }
+}
+
+static int __devinit jbusmc_probe(struct of_device *op,
+                                  const struct of_device_id *match)
+{
+        const struct linux_prom64_registers *mem_regs;
+        struct device_node *mem_node;
+        int err, len, num_mem_regs;
+        struct jbusmc *p;
+        const u32 *prop;
+        const void *ml;
+
+        err = -ENODEV;
+        mem_node = of_find_node_by_path("/memory");
+        if (!mem_node) {
+                printk(KERN_ERR PFX "Cannot find /memory node.\n");
+                goto out;
+        }
+        mem_regs = of_get_property(mem_node, "reg", &len);
+        if (!mem_regs) {
+                printk(KERN_ERR PFX "Cannot get reg property of /memory node.\n");
+                goto out;
+        }
+        num_mem_regs = len / sizeof(*mem_regs);
+
+        err = -ENOMEM;
+        p = kzalloc(sizeof(*p), GFP_KERNEL);
+        if (!p) {
+                printk(KERN_ERR PFX "Cannot allocate struct jbusmc.\n");
+                goto out;
+        }
+
+        INIT_LIST_HEAD(&p->list);
+
+        err = -ENODEV;
+        prop = of_get_property(op->node, "portid", &len);
+        if (!prop || len != 4) {
+                printk(KERN_ERR PFX "Cannot find portid.\n");
+                goto out_free;
+        }
+
+        p->portid = *prop;
+
+        prop = of_get_property(op->node, "memory-control-register-1", &len);
+        if (!prop || len != 8) {
+                printk(KERN_ERR PFX "Cannot get memory control register 1.\n");
+                goto out_free;
+        }
+
+        p->mc_reg_1 = ((u64)prop[0] << 32) | (u64) prop[1];
+
+        err = -ENOMEM;
+        p->regs = of_ioremap(&op->resource[0], 0, JBUSMC_REGS_SIZE, "jbusmc");
+        if (!p->regs) {
+                printk(KERN_ERR PFX "Cannot map jbusmc regs.\n");
+                goto out_free;
+        }
+
+        err = -ENODEV;
+        ml = of_get_property(op->node, "memory-layout", &p->layout_len);
+        if (!ml) {
+                printk(KERN_ERR PFX "Cannot get memory layout property.\n");
+                goto out_iounmap;
+        }
+        if (p->layout_len > sizeof(p->layout)) {
+                printk(KERN_ERR PFX "Unexpected memory-layout size %d\n",
+                       p->layout_len);
+                goto out_iounmap;
+        }
+        memcpy(&p->layout, ml, p->layout_len);
+
+        jbusmc_construct_dimm_groups(p, mem_regs, num_mem_regs);
+
+        mc_list_add(&p->list);
+
+        printk(KERN_INFO PFX "UltraSPARC-IIIi memory controller at %s\n",
+               op->node->full_name);
+
+        dev_set_drvdata(&op->dev, p);
+
+        err = 0;
+
+out:
+        return err;
+
+out_iounmap:
+        of_iounmap(&op->resource[0], p->regs, JBUSMC_REGS_SIZE);
+
+out_free:
+        kfree(p);
+        goto out;
+}
+
 /* Does BANK decode PHYS_ADDR? */
 static int chmc_bank_match(struct chmc_bank_info *bp, unsigned long phys_addr)
 {
@@ -133,17 +517,11 @@ static int chmc_bank_match(struct chmc_bank_info *bp, unsigned long phys_addr)
 /* Given PHYS_ADDR, search memory controller banks for a match. */
 static struct chmc_bank_info *chmc_find_bank(unsigned long phys_addr)
 {
-        struct list_head *mctrl_head = &mctrl_list;
-        struct list_head *mctrl_entry = mctrl_head->next;
+        struct chmc *p;
 
-        for (;;) {
-                struct chmc *p = list_entry(mctrl_entry, struct chmc, list);
+        list_for_each_entry(p, &mctrl_list, list) {
                 int bank_no;
 
-                if (mctrl_entry == mctrl_head)
-                        break;
-                mctrl_entry = mctrl_entry->next;
-
                 for (bank_no = 0; bank_no < CHMCTRL_NBANKS; bank_no++) {
                         struct chmc_bank_info *bp;
 
@@ -157,8 +535,6 @@ static struct chmc_bank_info *chmc_find_bank(unsigned long phys_addr)
 }
 
 /* This is the main purpose of this driver. */
-#define SYNDROME_MIN    -1
-#define SYNDROME_MAX    144
 static int chmc_print_dimm(int syndrome_code,
                            unsigned long phys_addr,
                            char *buf, int buflen)
@@ -184,54 +560,12 @@ static int chmc_print_dimm(int syndrome_code,
         first_dimm *= CHMCTRL_NDIMMS;
 
         if (syndrome_code != SYNDROME_MIN) {
-                struct chmc_obp_map *map;
-                int qword, where_in_line, where, map_index, map_offset;
-                unsigned int map_val;
-
-                /* Yaay, single bit error so we can figure out
-                 * the exact dimm.
-                 */
-                if (prop->symmetric)
-                        map = &prop->map[0];
-                else
-                        map = &prop->map[1];
-
-                /* Covert syndrome code into the way the bits are
-                 * positioned on the bus.
-                 */
-                if (syndrome_code < 144 - 16)
-                        syndrome_code += 16;
-                else if (syndrome_code < 144)
-                        syndrome_code -= (144 - 7);
-                else if (syndrome_code < (144 + 3))
-                        syndrome_code -= (144 + 3 - 4);
-                else
-                        syndrome_code -= 144 + 3;
+                char *dimm_str;
+                int pin;
 
-                /* All this magic has to do with how a cache line
-                 * comes over the wire on Safari.  A 64-bit line
-                 * comes over in 4 quadword cycles, each of which
-                 * transmit ECC/MTAG info as well as the actual
-                 * data.  144 bits per quadword, 576 total.
-                 */
-#define LINE_SIZE       64
-#define LINE_ADDR_MSK   (LINE_SIZE - 1)
-#define QW_PER_LINE     4
-#define QW_BYTES        (LINE_SIZE / QW_PER_LINE)
-#define QW_BITS         144
-#define LAST_BIT        (576 - 1)
-
-                qword = (phys_addr & LINE_ADDR_MSK) / QW_BYTES;
-                where_in_line = ((3 - qword) * QW_BITS) + syndrome_code;
-                where = (LAST_BIT - where_in_line);
-                map_index = where >> 2;
-                map_offset = where & 0x3;
-                map_val = map->dimm_map[map_index];
-                map_val = ((map_val >> ((3 - map_offset) << 1)) & (2 - 1));
-
-                sprintf(buf, "%s, pin %3d",
-                        prop->dimm_labels[first_dimm + map_val],
-                        map->pin_map[where_in_line]);
+                get_pin_and_dimm_str(syndrome_code, phys_addr, &pin,
+                                     &dimm_str, prop, first_dimm);
+                sprintf(buf, "%s, pin %3d", dimm_str, pin);
         } else {
                 int dimm;
 
@@ -412,9 +746,8 @@ static int __devinit chmc_probe(struct of_device *op,
 
         chmc_fetch_decode_regs(p);
 
-        list_add(&p->list, &mctrl_list);
+        mc_list_add(&p->list);
 
-        /* Report the device. */
         printk(KERN_INFO PFX "UltraSPARC-III memory controller at %s [%s]\n",
                dp->full_name,
                (p->layout_size ? "ACTIVE" : "INACTIVE"));
@@ -431,63 +764,100 @@ out_free:
         goto out;
 }
 
-static int __devexit chmc_remove(struct of_device *op)
+static int __devinit us3mc_probe(struct of_device *op,
+                                const struct of_device_id *match)
+{
+        if (mc_type == MC_TYPE_SAFARI)
+                return chmc_probe(op, match);
+        else if (mc_type == MC_TYPE_JBUS)
+                return jbusmc_probe(op, match);
+        return -ENODEV;
+}
+
+static void __devexit chmc_destroy(struct of_device *op, struct chmc *p)
+{
+        list_del(&p->list);
+        of_iounmap(&op->resource[0], p->regs, 0x48);
+        kfree(p);
+}
+
+static void __devexit jbusmc_destroy(struct of_device *op, struct jbusmc *p)
 {
-        struct chmc *p = dev_get_drvdata(&op->dev);
+        mc_list_del(&p->list);
+        of_iounmap(&op->resource[0], p->regs, JBUSMC_REGS_SIZE);
+        kfree(p);
+}
+
+static int __devexit us3mc_remove(struct of_device *op)
+{
+        void *p = dev_get_drvdata(&op->dev);
 
         if (p) {
-                list_del(&p->list);
-                of_iounmap(&op->resource[0], p->regs, 0x48);
-                kfree(p);
+                if (mc_type == MC_TYPE_SAFARI)
+                        chmc_destroy(op, p);
+                else if (mc_type == MC_TYPE_JBUS)
+                        jbusmc_destroy(op, p);
         }
         return 0;
 }
 
-static struct of_device_id chmc_match[] = {
+static struct of_device_id us3mc_match[] = {
         {
                 .name = "memory-controller",
         },
         {},
 };
-MODULE_DEVICE_TABLE(of, chmc_match);
+MODULE_DEVICE_TABLE(of, us3mc_match);
 
-static struct of_platform_driver chmc_driver = {
-        .name           = "chmc",
-        .match_table    = chmc_match,
-        .probe          = chmc_probe,
-        .remove         = __devexit_p(chmc_remove),
+static struct of_platform_driver us3mc_driver = {
+        .name           = "us3mc",
+        .match_table    = us3mc_match,
+        .probe          = us3mc_probe,
+        .remove         = __devexit_p(us3mc_remove),
 };
 
-static inline bool chmc_platform(void)
+static inline bool us3mc_platform(void)
 {
         if (tlb_type == cheetah || tlb_type == cheetah_plus)
                 return true;
         return false;
 }
 
-static int __init chmc_init(void)
+static int __init us3mc_init(void)
 {
+        unsigned long ver;
         int ret;
 
-        if (!chmc_platform())
+        if (!us3mc_platform())
                 return -ENODEV;
 
-        ret = register_dimm_printer(chmc_print_dimm);
+        __asm__ ("rdpr %%ver, %0" : "=r" (ver));
+        if ((ver >> 32UL) == __JALAPENO_ID ||
+            (ver >> 32UL) == __SERRANO_ID) {
+                mc_type = MC_TYPE_JBUS;
+                us3mc_dimm_printer = jbusmc_print_dimm;
+        } else {
+                mc_type = MC_TYPE_SAFARI;
+                us3mc_dimm_printer = chmc_print_dimm;
+        }
+
+        ret = register_dimm_printer(us3mc_dimm_printer);
+
         if (!ret) {
-                ret = of_register_driver(&chmc_driver, &of_bus_type);
+                ret = of_register_driver(&us3mc_driver, &of_bus_type);
                 if (ret)
-                        unregister_dimm_printer(chmc_print_dimm);
+                        unregister_dimm_printer(us3mc_dimm_printer);
         }
         return ret;
 }
 
-static void __exit chmc_cleanup(void)
+static void __exit us3mc_cleanup(void)
 {
-        if (chmc_platform()) {
-                unregister_dimm_printer(chmc_print_dimm);
-                of_unregister_driver(&chmc_driver);
+        if (us3mc_platform()) {
+                unregister_dimm_printer(us3mc_dimm_printer);
+                of_unregister_driver(&us3mc_driver);
         }
 }
 
-module_init(chmc_init);
-module_exit(chmc_cleanup);
+module_init(us3mc_init);
+module_exit(us3mc_cleanup);