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-rw-r--r--arch/sparc64/kernel/chmc.c536
1 files changed, 453 insertions, 83 deletions
diff --git a/arch/sparc64/kernel/chmc.c b/arch/sparc64/kernel/chmc.c
index a3c79fd5dd3..3e14952e940 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);
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-02 22:57:46 +0000