acpi/apei/einj: Add extensions to EINJ from rev 5.0 of acpi spec

ACPI 5.0 provides extensions to the EINJ mechanism to specify the
target for the error injection - by APICID for cpu related errors,
by address for memory related errors, and by segment/bus/device/function
for PCIe related errors. Also extensions for vendor specific error
injections.

Tested-by: Chen Gong <gong.chen@linux.intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 188 insertions, 36 deletions

diff --git a/drivers/acpi/apei/einj.c b/drivers/acpi/apei/einj.c
index 589b96c38704..31546fd21029 100644
--- a/drivers/acpi/apei/einj.c
+++ b/drivers/acpi/apei/einj.c
@@ -43,6 +43,42 @@
 #define FIRMWARE_TIMEOUT        (1 * NSEC_PER_MSEC)
 
 /*
+ * ACPI version 5 provides a SET_ERROR_TYPE_WITH_ADDRESS action.
+ */
+static int acpi5;
+
+struct set_error_type_with_address {
+        u32     type;
+        u32     vendor_extension;
+        u32     flags;
+        u32     apicid;
+        u64     memory_address;
+        u64     memory_address_range;
+        u32     pcie_sbdf;
+};
+enum {
+        SETWA_FLAGS_APICID = 1,
+        SETWA_FLAGS_MEM = 2,
+        SETWA_FLAGS_PCIE_SBDF = 4,
+};
+
+/*
+ * Vendor extensions for platform specific operations
+ */
+struct vendor_error_type_extension {
+        u32     length;
+        u32     pcie_sbdf;
+        u16     vendor_id;
+        u16     device_id;
+        u8      rev_id;
+        u8      reserved[3];
+};
+
+static u32 vendor_flags;
+static struct debugfs_blob_wrapper vendor_blob;
+static char vendor_dev[64];
+
+/*
  * Some BIOSes allow parameters to the SET_ERROR_TYPE entries in the
  * EINJ table through an unpublished extension. Use with caution as
  * most will ignore the parameter and make their own choice of address
@@ -103,7 +139,14 @@ static struct apei_exec_ins_type einj_ins_type[] = {
  */
 static DEFINE_MUTEX(einj_mutex);
 
-static struct einj_parameter *einj_param;
+static void *einj_param;
+
+#ifndef readq
+static inline __u64 readq(volatile void __iomem *addr)
+{
+        return ((__u64)readl(addr+4) << 32) + readl(addr);
+}
+#endif
 
 #ifndef writeq
 static inline void writeq(__u64 val, volatile void __iomem *addr)
@@ -158,10 +201,31 @@ static int einj_timedout(u64 *t)
         return 0;
 }
 
-static u64 einj_get_parameter_address(void)
+static void check_vendor_extension(u64 paddr,
+                                   struct set_error_type_with_address *v5param)
+{
+        int     offset = readl(&v5param->vendor_extension);
+        struct  vendor_error_type_extension *v;
+        u32     sbdf;
+
+        if (!offset)
+                return;
+        v = ioremap(paddr + offset, sizeof(*v));
+        if (!v)
+                return;
+        sbdf = readl(&v->pcie_sbdf);
+        sprintf(vendor_dev, "%x:%x:%x.%x vendor_id=%x device_id=%x rev_id=%x\n",
+                sbdf >> 24, (sbdf >> 16) & 0xff,
+                (sbdf >> 11) & 0x1f, (sbdf >> 8) & 0x7,
+                 readw(&v->vendor_id), readw(&v->device_id),
+                readb(&v->rev_id));
+        iounmap(v);
+}
+
+static void *einj_get_parameter_address(void)
 {
         int i;
-        u64 paddr = 0;
+        u64 paddrv4 = 0, paddrv5 = 0;
         struct acpi_whea_header *entry;
 
         entry = EINJ_TAB_ENTRY(einj_tab);
@@ -170,12 +234,40 @@ static u64 einj_get_parameter_address(void)
                     entry->instruction == ACPI_EINJ_WRITE_REGISTER &&
                     entry->register_region.space_id ==
                     ACPI_ADR_SPACE_SYSTEM_MEMORY)
-                        memcpy(&paddr, &entry->register_region.address,
-                               sizeof(paddr));
+                        memcpy(&paddrv4, &entry->register_region.address,
+                               sizeof(paddrv4));
+                if (entry->action == ACPI_EINJ_SET_ERROR_TYPE_WITH_ADDRESS &&
+                    entry->instruction == ACPI_EINJ_WRITE_REGISTER &&
+                    entry->register_region.space_id ==
+                    ACPI_ADR_SPACE_SYSTEM_MEMORY)
+                        memcpy(&paddrv5, &entry->register_region.address,
+                               sizeof(paddrv5));
                 entry++;
         }
+        if (paddrv5) {
+                struct set_error_type_with_address *v5param;
+
+                v5param = ioremap(paddrv5, sizeof(*v5param));
+                if (v5param) {
+                        acpi5 = 1;
+                        check_vendor_extension(paddrv5, v5param);
+                        return v5param;
+                }
+        }
+        if (paddrv4) {
+                struct einj_parameter *v4param;
+
+                v4param = ioremap(paddrv4, sizeof(*v4param));
+                if (!v4param)
+                        return 0;
+                if (readq(&v4param->reserved1) || readq(&v4param->reserved2)) {
+                        iounmap(v4param);
+                        return 0;
+                }
+                return v4param;
+        }
 
-        return paddr;
+        return 0;
 }
 
 /* do sanity check to trigger table */
@@ -293,12 +385,56 @@ static int __einj_error_inject(u32 type, u64 param1, u64 param2)
         if (rc)
                 return rc;
         apei_exec_ctx_set_input(&ctx, type);
-        rc = apei_exec_run(&ctx, ACPI_EINJ_SET_ERROR_TYPE);
-        if (rc)
-                return rc;
-        if (einj_param) {
-                writeq(param1, &einj_param->param1);
-                writeq(param2, &einj_param->param2);
+        if (acpi5) {
+                struct set_error_type_with_address *v5param = einj_param;
+
+                writel(type, &v5param->type);
+                if (type & 0x80000000) {
+                        switch (vendor_flags) {
+                        case SETWA_FLAGS_APICID:
+                                writel(param1, &v5param->apicid);
+                                break;
+                        case SETWA_FLAGS_MEM:
+                                writeq(param1, &v5param->memory_address);
+                                writeq(param2, &v5param->memory_address_range);
+                                break;
+                        case SETWA_FLAGS_PCIE_SBDF:
+                                writel(param1, &v5param->pcie_sbdf);
+                                break;
+                        }
+                        writel(vendor_flags, &v5param->flags);
+                } else {
+                        switch (type) {
+                        case ACPI_EINJ_PROCESSOR_CORRECTABLE:
+                        case ACPI_EINJ_PROCESSOR_UNCORRECTABLE:
+                        case ACPI_EINJ_PROCESSOR_FATAL:
+                                writel(param1, &v5param->apicid);
+                                writel(SETWA_FLAGS_APICID, &v5param->flags);
+                                break;
+                        case ACPI_EINJ_MEMORY_CORRECTABLE:
+                        case ACPI_EINJ_MEMORY_UNCORRECTABLE:
+                        case ACPI_EINJ_MEMORY_FATAL:
+                                writeq(param1, &v5param->memory_address);
+                                writeq(param2, &v5param->memory_address_range);
+                                writel(SETWA_FLAGS_MEM, &v5param->flags);
+                                break;
+                        case ACPI_EINJ_PCIX_CORRECTABLE:
+                        case ACPI_EINJ_PCIX_UNCORRECTABLE:
+                        case ACPI_EINJ_PCIX_FATAL:
+                                writel(param1, &v5param->pcie_sbdf);
+                                writel(SETWA_FLAGS_PCIE_SBDF, &v5param->flags);
+                                break;
+                        }
+                }
+        } else {
+                rc = apei_exec_run(&ctx, ACPI_EINJ_SET_ERROR_TYPE);
+                if (rc)
+                        return rc;
+                if (einj_param) {
+                        struct einj_parameter *v4param = einj_param;
+                        writeq(param1, &v4param->param1);
+                        writeq(param2, &v4param->param2);
+                }
         }
         rc = apei_exec_run(&ctx, ACPI_EINJ_EXECUTE_OPERATION);
         if (rc)
@@ -408,15 +544,25 @@ static int error_type_set(void *data, u64 val)
 {
         int rc;
         u32 available_error_type = 0;
+        u32 tval, vendor;
+
+        /*
+         * Vendor defined types have 0x80000000 bit set, and
+         * are not enumerated by ACPI_EINJ_GET_ERROR_TYPE
+         */
+        vendor = val & 0x80000000;
+        tval = val & 0x7fffffff;
 
         /* Only one error type can be specified */
-        if (val & (val - 1))
-                return -EINVAL;
-        rc = einj_get_available_error_type(&available_error_type);
-        if (rc)
-                return rc;
-        if (!(val & available_error_type))
+        if (tval & (tval - 1))
                 return -EINVAL;
+        if (!vendor) {
+                rc = einj_get_available_error_type(&available_error_type);
+                if (rc)
+                        return rc;
+                if (!(val & available_error_type))
+                        return -EINVAL;
+        }
         error_type = val;
 
         return 0;
@@ -455,7 +601,6 @@ static int einj_check_table(struct acpi_table_einj *einj_tab)
 static int __init einj_init(void)
 {
         int rc;
-        u64 param_paddr;
         acpi_status status;
         struct dentry *fentry;
         struct apei_exec_context ctx;
@@ -509,23 +654,30 @@ static int __init einj_init(void)
         rc = apei_exec_pre_map_gars(&ctx);
         if (rc)
                 goto err_release;
-        if (param_extension) {
-                param_paddr = einj_get_parameter_address();
-                if (param_paddr) {
-                        einj_param = ioremap(param_paddr, sizeof(*einj_param));
-                        rc = -ENOMEM;
-                        if (!einj_param)
-                                goto err_unmap;
-                        fentry = debugfs_create_x64("param1", S_IRUSR | S_IWUSR,
-                                                    einj_debug_dir, &error_param1);
-                        if (!fentry)
-                                goto err_unmap;
-                        fentry = debugfs_create_x64("param2", S_IRUSR | S_IWUSR,
-                                                    einj_debug_dir, &error_param2);
-                        if (!fentry)
-                                goto err_unmap;
-                } else
-                        pr_warn(EINJ_PFX "Parameter extension is not supported.\n");
+
+        einj_param = einj_get_parameter_address();
+        if ((param_extension || acpi5) && einj_param) {
+                fentry = debugfs_create_x64("param1", S_IRUSR | S_IWUSR,
+                                            einj_debug_dir, &error_param1);
+                if (!fentry)
+                        goto err_unmap;
+                fentry = debugfs_create_x64("param2", S_IRUSR | S_IWUSR,
+                                            einj_debug_dir, &error_param2);
+                if (!fentry)
+                        goto err_unmap;
+        }
+
+        if (vendor_dev[0]) {
+                vendor_blob.data = vendor_dev;
+                vendor_blob.size = strlen(vendor_dev);
+                fentry = debugfs_create_blob("vendor", S_IRUSR,
+                                             einj_debug_dir, &vendor_blob);
+                if (!fentry)
+                        goto err_unmap;
+                fentry = debugfs_create_x32("vendor_flags", S_IRUSR | S_IWUSR,
+                                            einj_debug_dir, &vendor_flags);
+                if (!fentry)
+                        goto err_unmap;
         }
 
         pr_info(EINJ_PFX "Error INJection is initialized.\n");