MODULE_DESCRIPTION("AMD Microcode Update Driver");
MODULE_AUTHOR("Peter Oruba <peter.oruba@amd.com>");
-MODULE_LICENSE("GPLv2");
+MODULE_LICENSE("GPL v2");
#define UCODE_MAGIC 0x00414d44
#define UCODE_EQUIV_CPU_TABLE_TYPE 0x00000000
#define UCODE_UCODE_TYPE 0x00000001
+struct equiv_cpu_entry {
+ unsigned int installed_cpu;
+ unsigned int fixed_errata_mask;
+ unsigned int fixed_errata_compare;
+ unsigned int equiv_cpu;
+};
+
+struct microcode_header_amd {
+ unsigned int data_code;
+ unsigned int patch_id;
+ unsigned char mc_patch_data_id[2];
+ unsigned char mc_patch_data_len;
+ unsigned char init_flag;
+ unsigned int mc_patch_data_checksum;
+ unsigned int nb_dev_id;
+ unsigned int sb_dev_id;
+ unsigned char processor_rev_id[2];
+ unsigned char nb_rev_id;
+ unsigned char sb_rev_id;
+ unsigned char bios_api_rev;
+ unsigned char reserved1[3];
+ unsigned int match_reg[8];
+};
+
+struct microcode_amd {
+ struct microcode_header_amd hdr;
+ unsigned int mpb[0];
+};
+
#define UCODE_MAX_SIZE (2048)
-#define DEFAULT_UCODE_DATASIZE (896) /* 896 bytes */
-#define MC_HEADER_SIZE (sizeof(struct microcode_header_amd)) /* 64 bytes */
-#define DEFAULT_UCODE_TOTALSIZE (DEFAULT_UCODE_DATASIZE + MC_HEADER_SIZE) /* 960 bytes */
+#define DEFAULT_UCODE_DATASIZE (896)
+#define MC_HEADER_SIZE (sizeof(struct microcode_header_amd))
+#define DEFAULT_UCODE_TOTALSIZE (DEFAULT_UCODE_DATASIZE + MC_HEADER_SIZE)
#define DWSIZE (sizeof(u32))
/* For now we support a fixed ucode total size only */
#define get_totalsize(mc) \
((((struct microcode_amd *)mc)->hdr.mc_patch_data_len * 28) \
+ MC_HEADER_SIZE)
-extern int microcode_init(void *opaque, struct module *module);
-extern void microcode_exit(void);
-
/* serialize access to the physical write */
static DEFINE_SPINLOCK(microcode_update_lock);
-/* no concurrent ->write()s are allowed on /dev/cpu/microcode */
-extern struct mutex (microcode_mutex);
+static struct equiv_cpu_entry *equiv_cpu_table;
-struct equiv_cpu_entry *equiv_cpu_table;
-
-extern struct ucode_cpu_info ucode_cpu_info[NR_CPUS];
-
-static void collect_cpu_info_amd(int cpu)
+static int collect_cpu_info_amd(int cpu, struct cpu_signature *csig)
{
struct cpuinfo_x86 *c = &cpu_data(cpu);
- struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
- /* We should bind the task to the CPU */
- BUG_ON(raw_smp_processor_id() != cpu);
- uci->rev = 0;
- uci->pf = 0;
- uci->mc.mc_amd = NULL;
- uci->valid = 1;
+ memset(csig, 0, sizeof(*csig));
if (c->x86_vendor != X86_VENDOR_AMD || c->x86 < 0x10) {
printk(KERN_ERR "microcode: CPU%d not a capable AMD processor\n",
cpu);
- uci->valid = 0;
- return;
+ return -1;
}
asm volatile("movl %1, %%ecx; rdmsr"
- : "=a" (uci->rev)
+ : "=a" (csig->rev)
: "i" (0x0000008B) : "ecx");
printk(KERN_INFO "microcode: collect_cpu_info_amd : patch_id=0x%x\n",
- uci->rev);
+ csig->rev);
+
+ return 0;
}
-static int get_matching_microcode_amd(void *mc, int cpu)
+static int get_matching_microcode(int cpu, void *mc, int rev)
{
- struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
struct microcode_header_amd *mc_header = mc;
- unsigned long total_size = get_totalsize(mc_header);
- void *new_mc;
struct pci_dev *nb_pci_dev, *sb_pci_dev;
unsigned int current_cpu_id;
unsigned int equiv_cpu_id = 0x00;
unsigned int i = 0;
- /* We should bind the task to the CPU */
- BUG_ON(cpu != raw_smp_processor_id());
-
- /* This is a tricky part. We might be called from a write operation */
- /* to the device file instead of the usual process of firmware */
- /* loading. This routine needs to be able to distinguish both */
-/* cases. This is done by checking if there alread is a equivalent */
- /* CPU table installed. If not, we're written through */
- /* /dev/cpu/microcode. */
-/* Since we ignore all checks. The error case in which going through */
-/* firmware loading and that table is not loaded has already been */
- /* checked earlier. */
- if (equiv_cpu_table == NULL) {
- printk(KERN_INFO "microcode: CPU%d microcode update with "
- "version 0x%x (current=0x%x)\n",
- cpu, mc_header->patch_id, uci->rev);
- goto out;
- }
-
+ BUG_ON(equiv_cpu_table == NULL);
current_cpu_id = cpuid_eax(0x00000001);
while (equiv_cpu_table[i].installed_cpu != 0) {
pci_dev_put(sb_pci_dev);
}
- if (mc_header->patch_id <= uci->rev)
+ if (mc_header->patch_id <= rev)
return 0;
- printk(KERN_INFO "microcode: CPU%d found a matching microcode "
- "update with version 0x%x (current=0x%x)\n",
- cpu, mc_header->patch_id, uci->rev);
-
-out:
- new_mc = vmalloc(UCODE_MAX_SIZE);
- if (!new_mc) {
- printk(KERN_ERR "microcode: error, can't allocate memory\n");
- return -ENOMEM;
- }
- memset(new_mc, 0, UCODE_MAX_SIZE);
-
- /* free previous update file */
- vfree(uci->mc.mc_amd);
-
- memcpy(new_mc, mc, total_size);
-
- uci->mc.mc_amd = new_mc;
return 1;
}
unsigned int rev;
int cpu_num = raw_smp_processor_id();
struct ucode_cpu_info *uci = ucode_cpu_info + cpu_num;
+ struct microcode_amd *mc_amd = uci->mc;
+ unsigned long addr;
/* We should bind the task to the CPU */
BUG_ON(cpu_num != cpu);
- if (uci->mc.mc_amd == NULL)
+ if (mc_amd == NULL)
return;
spin_lock_irqsave(µcode_update_lock, flags);
- edx = (unsigned int)(((unsigned long)
- &(uci->mc.mc_amd->hdr.data_code)) >> 32);
- eax = (unsigned int)(((unsigned long)
- &(uci->mc.mc_amd->hdr.data_code)) & 0xffffffffL);
+ addr = (unsigned long)&mc_amd->hdr.data_code;
+ edx = (unsigned int)(((unsigned long)upper_32_bits(addr)));
+ eax = (unsigned int)(((unsigned long)lower_32_bits(addr)));
asm volatile("movl %0, %%ecx; wrmsr" :
: "i" (0xc0010020), "a" (eax), "d" (edx) : "ecx");
spin_unlock_irqrestore(µcode_update_lock, flags);
/* check current patch id and patch's id for match */
- if (rev != uci->mc.mc_amd->hdr.patch_id) {
+ if (rev != mc_amd->hdr.patch_id) {
printk(KERN_ERR "microcode: CPU%d update from revision "
"0x%x to 0x%x failed\n", cpu_num,
- uci->mc.mc_amd->hdr.patch_id, rev);
+ mc_amd->hdr.patch_id, rev);
return;
}
printk(KERN_INFO "microcode: CPU%d updated from revision "
"0x%x to 0x%x \n",
- cpu_num, uci->rev, uci->mc.mc_amd->hdr.patch_id);
+ cpu_num, uci->cpu_sig.rev, mc_amd->hdr.patch_id);
- uci->rev = rev;
+ uci->cpu_sig.rev = rev;
}
-#ifdef CONFIG_MICROCODE_OLD_INTERFACE
-extern void __user *user_buffer; /* user area microcode data buffer */
-extern unsigned int user_buffer_size; /* it's size */
-
-static long get_next_ucode_amd(void **mc, long offset)
+static void * get_next_ucode(u8 *buf, unsigned int size,
+ int (*get_ucode_data)(void *, const void *, size_t),
+ unsigned int *mc_size)
{
- struct microcode_header_amd mc_header;
- unsigned long total_size;
-
- /* No more data */
- if (offset >= user_buffer_size)
- return 0;
- if (copy_from_user(&mc_header, user_buffer + offset, MC_HEADER_SIZE)) {
- printk(KERN_ERR "microcode: error! Can not read user data\n");
- return -EFAULT;
- }
- total_size = get_totalsize(&mc_header);
- if (offset + total_size > user_buffer_size) {
- printk(KERN_ERR "microcode: error! Bad total size in microcode "
- "data file\n");
- return -EINVAL;
- }
- *mc = vmalloc(UCODE_MAX_SIZE);
- if (!*mc)
- return -ENOMEM;
- memset(*mc, 0, UCODE_MAX_SIZE);
-
- if (copy_from_user(*mc, user_buffer + offset, total_size)) {
- printk(KERN_ERR "microcode: error! Can not read user data\n");
- vfree(*mc);
- return -EFAULT;
- }
- return offset + total_size;
-}
-#else
-#define get_next_ucode_amd() NULL
-#endif
-
-static long get_next_ucode_from_buffer_amd(void **mc, void *buf,
- unsigned long size, long offset)
-{
- struct microcode_header_amd *mc_header;
- unsigned long total_size;
- unsigned char *buf_pos = buf;
+ unsigned int total_size;
+#define UCODE_CONTAINER_SECTION_HDR 8
+ u8 section_hdr[UCODE_CONTAINER_SECTION_HDR];
+ void *mc;
- /* No more data */
- if (offset >= size)
- return 0;
+ if (get_ucode_data(section_hdr, buf, UCODE_CONTAINER_SECTION_HDR))
+ return NULL;
- if (buf_pos[offset] != UCODE_UCODE_TYPE) {
+ if (section_hdr[0] != UCODE_UCODE_TYPE) {
printk(KERN_ERR "microcode: error! "
"Wrong microcode payload type field\n");
- return -EINVAL;
+ return NULL;
}
- mc_header = (struct microcode_header_amd *)(&buf_pos[offset+8]);
+ total_size = (unsigned long) (section_hdr[4] + (section_hdr[5] << 8));
- total_size = (unsigned long) (buf_pos[offset+4] +
- (buf_pos[offset+5] << 8));
+ printk(KERN_INFO "microcode: size %u, total_size %u\n",
+ size, total_size);
- printk(KERN_INFO "microcode: size %lu, total_size %lu, offset %ld\n",
- size, total_size, offset);
-
- if (offset + total_size > size) {
+ if (total_size > size || total_size > UCODE_MAX_SIZE) {
printk(KERN_ERR "microcode: error! Bad data in microcode data file\n");
- return -EINVAL;
+ return NULL;
}
- *mc = vmalloc(UCODE_MAX_SIZE);
- if (!*mc) {
- printk(KERN_ERR "microcode: error! "
- "Can not allocate memory for microcode patch\n");
- return -ENOMEM;
+ mc = vmalloc(UCODE_MAX_SIZE);
+ if (mc) {
+ memset(mc, 0, UCODE_MAX_SIZE);
+ if (get_ucode_data(mc, buf + UCODE_CONTAINER_SECTION_HDR, total_size)) {
+ vfree(mc);
+ mc = NULL;
+ } else
+ *mc_size = total_size + UCODE_CONTAINER_SECTION_HDR;
}
-
- memset(*mc, 0, UCODE_MAX_SIZE);
- memcpy(*mc, buf + offset + 8, total_size);
-
- return offset + total_size + 8;
+#undef UCODE_CONTAINER_SECTION_HDR
+ return mc;
}
-static long install_equiv_cpu_table(void *buf, unsigned long size, long offset)
+
+static int install_equiv_cpu_table(u8 *buf,
+ int (*get_ucode_data)(void *, const void *, size_t))
{
- unsigned int *buf_pos = buf;
+#define UCODE_CONTAINER_HEADER_SIZE 12
+ u8 *container_hdr[UCODE_CONTAINER_HEADER_SIZE];
+ unsigned int *buf_pos = (unsigned int *)container_hdr;
+ unsigned long size;
- /* No more data */
- if (offset >= size)
+ if (get_ucode_data(&container_hdr, buf, UCODE_CONTAINER_HEADER_SIZE))
return 0;
- if (buf_pos[1] != UCODE_EQUIV_CPU_TABLE_TYPE) {
- printk(KERN_ERR "microcode: error! "
- "Wrong microcode equivalnet cpu table type field\n");
- return 0;
- }
+ size = buf_pos[2];
- if (size == 0) {
+ if (buf_pos[1] != UCODE_EQUIV_CPU_TABLE_TYPE || !size) {
printk(KERN_ERR "microcode: error! "
- "Wrong microcode equivalnet cpu table length\n");
+ "Wrong microcode equivalnet cpu table\n");
return 0;
}
return 0;
}
- memset(equiv_cpu_table, 0, size);
- memcpy(equiv_cpu_table, &buf_pos[3], size);
+ buf += UCODE_CONTAINER_HEADER_SIZE;
+ if (get_ucode_data(equiv_cpu_table, buf, size)) {
+ vfree(equiv_cpu_table);
+ return 0;
+ }
- return size + 12; /* add header length */
+ return size + UCODE_CONTAINER_HEADER_SIZE; /* add header length */
+#undef UCODE_CONTAINER_HEADER_SIZE
}
-/* fake device for request_firmware */
-extern struct platform_device *microcode_pdev;
-
-static int cpu_request_microcode_amd(int cpu)
+static void free_equiv_cpu_table(void)
{
- char name[30];
- const struct firmware *firmware;
- void *buf;
- unsigned int *buf_pos;
- unsigned long size;
- long offset = 0;
- int error;
- void *mc;
-
- /* We should bind the task to the CPU */
- BUG_ON(cpu != raw_smp_processor_id());
-
- sprintf(name, "amd-ucode/microcode_amd.bin");
- error = request_firmware(&firmware, "amd-ucode/microcode_amd.bin",
- µcode_pdev->dev);
- if (error) {
- printk(KERN_ERR "microcode: ucode data file %s load failed\n",
- name);
- return error;
- }
-
- buf_pos = buf = firmware->data;
- size = firmware->size;
-
- if (buf_pos[0] != UCODE_MAGIC) {
- printk(KERN_ERR "microcode: error! Wrong microcode patch file magic\n");
- return -EINVAL;
+ if (equiv_cpu_table) {
+ vfree(equiv_cpu_table);
+ equiv_cpu_table = NULL;
}
+}
- offset = install_equiv_cpu_table(buf, buf_pos[2], offset);
+static int generic_load_microcode(int cpu, void *data, size_t size,
+ int (*get_ucode_data)(void *, const void *, size_t))
+{
+ struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
+ u8 *ucode_ptr = data, *new_mc = NULL, *mc;
+ int new_rev = uci->cpu_sig.rev;
+ unsigned int leftover;
+ unsigned long offset;
+ offset = install_equiv_cpu_table(ucode_ptr, get_ucode_data);
if (!offset) {
printk(KERN_ERR "microcode: installing equivalent cpu table failed\n");
return -EINVAL;
}
- while ((offset =
- get_next_ucode_from_buffer_amd(&mc, buf, size, offset)) > 0) {
- error = get_matching_microcode_amd(mc, cpu);
- if (error < 0)
+ ucode_ptr += offset;
+ leftover = size - offset;
+
+ while (leftover) {
+ unsigned int uninitialized_var(mc_size);
+ struct microcode_header_amd *mc_header;
+
+ mc = get_next_ucode(ucode_ptr, leftover, get_ucode_data, &mc_size);
+ if (!mc)
break;
- /*
- * It's possible the data file has multiple matching ucode,
- * lets keep searching till the latest version
- */
- if (error == 1) {
- apply_microcode_amd(cpu);
- error = 0;
- }
- vfree(mc);
+
+ mc_header = (struct microcode_header_amd *)mc;
+ if (get_matching_microcode(cpu, mc, new_rev)) {
+ if (new_mc)
+ vfree(new_mc);
+ new_rev = mc_header->patch_id;
+ new_mc = mc;
+ } else
+ vfree(mc);
+
+ ucode_ptr += mc_size;
+ leftover -= mc_size;
}
- if (offset > 0) {
- vfree(mc);
- vfree(equiv_cpu_table);
- equiv_cpu_table = NULL;
+
+ if (new_mc) {
+ if (!leftover) {
+ if (uci->mc)
+ vfree(uci->mc);
+ uci->mc = new_mc;
+ pr_debug("microcode: CPU%d found a matching microcode update with"
+ " version 0x%x (current=0x%x)\n",
+ cpu, new_rev, uci->cpu_sig.rev);
+ } else
+ vfree(new_mc);
}
- if (offset < 0)
- error = offset;
- release_firmware(firmware);
- return error;
+ free_equiv_cpu_table();
+
+ return (int)leftover;
}
-static int apply_microcode_check_cpu_amd(int cpu)
+static int get_ucode_fw(void *to, const void *from, size_t n)
{
- struct cpuinfo_x86 *c = &cpu_data(cpu);
- struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
- unsigned int rev;
- cpumask_t old;
- cpumask_of_cpu_ptr(newmask, cpu);
- int err = 0;
+ memcpy(to, from, n);
+ return 0;
+}
- /* Check if the microcode is available */
- if (!uci->mc.mc_amd)
- return 0;
+static int request_microcode_fw(int cpu, struct device *device)
+{
+ const char *fw_name = "amd-ucode/microcode_amd.bin";
+ const struct firmware *firmware;
+ int ret;
- old = current->cpus_allowed;
- set_cpus_allowed(current, newmask);
+ /* We should bind the task to the CPU */
+ BUG_ON(cpu != raw_smp_processor_id());
- /* Check if the microcode we have in memory matches the CPU */
- if (c->x86_vendor != X86_VENDOR_AMD || c->x86 < 16)
- err = -EINVAL;
+ ret = request_firmware(&firmware, fw_name, device);
+ if (ret) {
+ printk(KERN_ERR "microcode: ucode data file %s load failed\n", fw_name);
+ return ret;
+ }
- if (!err) {
- asm volatile("movl %1, %%ecx; rdmsr"
- : "=a" (rev)
- : "i" (0x0000008B) : "ecx");
+ ret = generic_load_microcode(cpu, (void*)firmware->data, firmware->size,
+ &get_ucode_fw);
- if (uci->rev != rev)
- err = -EINVAL;
- }
+ release_firmware(firmware);
- if (!err)
- apply_microcode_amd(cpu);
- else
- printk(KERN_ERR "microcode: Could not apply microcode to CPU%d:"
- " rev=0x%x\n",
- cpu, uci->rev);
+ return ret;
+}
- set_cpus_allowed(current, old);
- return err;
+static int request_microcode_user(int cpu, const void __user *buf, size_t size)
+{
+ printk(KERN_WARNING "microcode: AMD microcode update via /dev/cpu/microcode"
+ "is not supported\n");
+ return -1;
}
static void microcode_fini_cpu_amd(int cpu)
{
struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
- mutex_lock(µcode_mutex);
- uci->valid = 0;
- vfree(uci->mc.mc_amd);
- uci->mc.mc_amd = NULL;
- mutex_unlock(µcode_mutex);
+ vfree(uci->mc);
+ uci->mc = NULL;
}
static struct microcode_ops microcode_amd_ops = {
- .get_next_ucode = get_next_ucode_amd,
- .get_matching_microcode = get_matching_microcode_amd,
- .microcode_sanity_check = NULL,
- .apply_microcode_check_cpu = apply_microcode_check_cpu_amd,
- .cpu_request_microcode = cpu_request_microcode_amd,
+ .request_microcode_user = request_microcode_user,
+ .request_microcode_fw = request_microcode_fw,
.collect_cpu_info = collect_cpu_info_amd,
.apply_microcode = apply_microcode_amd,
.microcode_fini_cpu = microcode_fini_cpu_amd,
};
-static int __init microcode_amd_module_init(void)
-{
- struct cpuinfo_x86 *c = &cpu_data(get_cpu());
-
- equiv_cpu_table = NULL;
- if (c->x86_vendor == X86_VENDOR_AMD)
- return microcode_init(µcode_amd_ops, THIS_MODULE);
- else
- return -ENODEV;
-}
-
-static void __exit microcode_amd_module_exit(void)
+struct microcode_ops * __init init_amd_microcode(void)
{
- microcode_exit();
+ return µcode_amd_ops;
}
-
-module_init(microcode_amd_module_init)
-module_exit(microcode_amd_module_exit)
projects / linux-2.6-omap-h63xx.git / blobdiff