ssize_t apei_read_mce(struct mce *m, u64 *record_id)
{
struct cper_mce_record rcd;
int rc, pos;
rc = erst_get_record_id_begin(&pos);
if (rc)
return rc;
retry:
rc = erst_get_record_id_next(&pos, record_id);
if (rc)
goto out;
/* no more record */
if (*record_id == APEI_ERST_INVALID_RECORD_ID)
goto out;
rc = erst_read(*record_id, &rcd.hdr, sizeof(rcd));
/* someone else has cleared the record, try next one */
if (rc == -ENOENT)
goto retry;
else if (rc < 0)
goto out;
/* try to skip other type records in storage */
else if (rc != sizeof(rcd) ||
uuid_le_cmp(rcd.hdr.creator_id, CPER_CREATOR_MCE))
goto retry;
memcpy(m, &rcd.mce, sizeof(*m));
rc = sizeof(*m);
out:
erst_get_record_id_end();
return rc;
}
static void apei_estatus_print_section(
const char *pfx, const struct acpi_hest_generic_data *gdata, int sec_no)
{
uuid_le *sec_type = (uuid_le *)gdata->section_type;
__u16 severity;
severity = gdata->error_severity;
printk("%s""section: %d, severity: %d, %s\n", pfx, sec_no, severity,
cper_severity_str(severity));
printk("%s""flags: 0x%02x\n", pfx, gdata->flags);
cper_print_bits(pfx, gdata->flags, apei_estatus_section_flag_strs,
ARRAY_SIZE(apei_estatus_section_flag_strs));
if (gdata->validation_bits & CPER_SEC_VALID_FRU_ID)
printk("%s""fru_id: %pUl\n", pfx, (uuid_le *)gdata->fru_id);
if (gdata->validation_bits & CPER_SEC_VALID_FRU_TEXT)
printk("%s""fru_text: %.20s\n", pfx, gdata->fru_text);
if (!uuid_le_cmp(*sec_type, CPER_SEC_PROC_GENERIC)) {
struct cper_sec_proc_generic *proc_err = (void *)(gdata + 1);
printk("%s""section_type: general processor error\n", pfx);
if (gdata->error_data_length >= sizeof(*proc_err))
cper_print_proc_generic(pfx, proc_err);
else
goto err_section_too_small;
} else if (!uuid_le_cmp(*sec_type, CPER_SEC_PLATFORM_MEM)) {
struct cper_sec_mem_err *mem_err = (void *)(gdata + 1);
printk("%s""section_type: memory error\n", pfx);
if (gdata->error_data_length >= sizeof(*mem_err))
cper_print_mem(pfx, mem_err);
else
goto err_section_too_small;
} else if (!uuid_le_cmp(*sec_type, CPER_SEC_PCIE)) {
struct cper_sec_pcie *pcie = (void *)(gdata + 1);
printk("%s""section_type: PCIe error\n", pfx);
if (gdata->error_data_length >= sizeof(*pcie))
cper_print_pcie(pfx, pcie, gdata);
else
goto err_section_too_small;
} else
printk("%s""section type: unknown, %pUl\n", pfx, sec_type);
return;
err_section_too_small:
pr_err(FW_WARN "error section length is too small\n");
}
static void cper_estatus_print_section(
const char *pfx, const struct acpi_generic_data *gdata, int sec_no)
{
uuid_le *sec_type = (uuid_le *)gdata->section_type;
__u16 severity;
char newpfx[64];
severity = gdata->error_severity;
printk("%s""Error %d, type: %s\n", pfx, sec_no,
cper_severity_str(severity));
if (gdata->validation_bits & CPER_SEC_VALID_FRU_ID)
printk("%s""fru_id: %pUl\n", pfx, (uuid_le *)gdata->fru_id);
if (gdata->validation_bits & CPER_SEC_VALID_FRU_TEXT)
printk("%s""fru_text: %.20s\n", pfx, gdata->fru_text);
snprintf(newpfx, sizeof(newpfx), "%s%s", pfx, INDENT_SP);
if (!uuid_le_cmp(*sec_type, CPER_SEC_PROC_GENERIC)) {
struct cper_sec_proc_generic *proc_err = (void *)(gdata + 1);
printk("%s""section_type: general processor error\n", newpfx);
if (gdata->error_data_length >= sizeof(*proc_err))
cper_print_proc_generic(newpfx, proc_err);
else
goto err_section_too_small;
} else if (!uuid_le_cmp(*sec_type, CPER_SEC_PLATFORM_MEM)) {
struct cper_sec_mem_err *mem_err = (void *)(gdata + 1);
printk("%s""section_type: memory error\n", newpfx);
if (gdata->error_data_length >= sizeof(*mem_err))
cper_print_mem(newpfx, mem_err);
else
goto err_section_too_small;
} else if (!uuid_le_cmp(*sec_type, CPER_SEC_PCIE)) {
struct cper_sec_pcie *pcie = (void *)(gdata + 1);
printk("%s""section_type: PCIe error\n", newpfx);
if (gdata->error_data_length >= sizeof(*pcie))
cper_print_pcie(newpfx, pcie, gdata);
else
goto err_section_too_small;
} else
printk("%s""section type: unknown, %pUl\n", newpfx, sec_type);
return;
err_section_too_small:
pr_err(FW_WARN "error section length is too small\n");
}
/**
* hid_ishtp_cl_probe() - ISHTP client driver probe
* @cl_device: ISHTP client device instance
*
* This function gets called on device create on ISHTP bus
*
* Return: 0 on success, non zero on error
*/
static int hid_ishtp_cl_probe(struct ishtp_cl_device *cl_device)
{
struct ishtp_cl *hid_ishtp_cl;
struct ishtp_cl_data *client_data;
int rv;
if (!cl_device)
return -ENODEV;
if (uuid_le_cmp(hid_ishtp_guid,
cl_device->fw_client->props.protocol_name) != 0)
return -ENODEV;
client_data = devm_kzalloc(&cl_device->dev, sizeof(*client_data),
GFP_KERNEL);
if (!client_data)
return -ENOMEM;
hid_ishtp_cl = ishtp_cl_allocate(cl_device->ishtp_dev);
if (!hid_ishtp_cl)
return -ENOMEM;
cl_device->driver_data = hid_ishtp_cl;
hid_ishtp_cl->client_data = client_data;
client_data->hid_ishtp_cl = hid_ishtp_cl;
client_data->cl_device = cl_device;
init_waitqueue_head(&client_data->init_wait);
init_waitqueue_head(&client_data->ishtp_resume_wait);
INIT_WORK(&client_data->work, hid_ishtp_cl_reset_handler);
rv = hid_ishtp_cl_init(hid_ishtp_cl, 0);
if (rv) {
ishtp_cl_free(hid_ishtp_cl);
return rv;
}
ishtp_get_device(cl_device);
return 0;
}
ssize_t apei_read_mce(struct mce *m, u64 *record_id)
{
struct cper_mce_record rcd;
ssize_t len;
if (!m || !record_id)
return -EINVAL;
len = erst_read_next(&rcd.hdr, sizeof(rcd));
if (len <= 0)
return len;
/* Can not skip other records in storage via ERST unless clear them */
else if (len != sizeof(rcd) ||
uuid_le_cmp(rcd.hdr.creator_id, CPER_CREATOR_MCE)) {
printk(KERN_WARNING
"MCE-APEI: Can not skip the unknown record in ERST");
return -EIO;
}
memcpy(m, &rcd.mce, sizeof(*m));
*record_id = rcd.hdr.record_id;
return sizeof(*m);
}
/* Creates the VISORCHANNEL abstraction for a data area in memory, but does
* NOT modify this data area.
*/
static VISORCHANNEL *
visorchannel_create_guts(HOSTADDRESS physaddr, ulong channelBytes,
VISORCHANNEL *parent, ulong off, uuid_le guid,
BOOL needs_lock)
{
VISORCHANNEL *p = NULL;
void *rc = NULL;
p = kmalloc(sizeof(VISORCHANNEL), GFP_KERNEL|__GFP_NORETRY);
if (p == NULL) {
ERRDRV("allocation failed: (status=0)\n");
rc = NULL;
goto Away;
}
p->memregion = NULL;
p->needs_lock = needs_lock;
spin_lock_init(&p->insert_lock);
spin_lock_init(&p->remove_lock);
/* prepare chan_hdr (abstraction to read/write channel memory) */
if (parent == NULL)
p->memregion =
visor_memregion_create(physaddr, sizeof(CHANNEL_HEADER));
else
p->memregion =
visor_memregion_create_overlapped(parent->memregion,
off,
sizeof(CHANNEL_HEADER));
if (p->memregion == NULL) {
ERRDRV("visor_memregion_create failed failed: (status=0)\n");
rc = NULL;
goto Away;
}
if (visor_memregion_read(p->memregion, 0, &p->chan_hdr,
sizeof(CHANNEL_HEADER)) < 0) {
ERRDRV("visor_memregion_read failed: (status=0)\n");
rc = NULL;
goto Away;
}
if (channelBytes == 0)
/* we had better be a CLIENT of this channel */
channelBytes = (ulong) p->chan_hdr.Size;
if (uuid_le_cmp(guid, NULL_UUID_LE) == 0)
/* we had better be a CLIENT of this channel */
guid = p->chan_hdr.Type;
if (visor_memregion_resize(p->memregion, channelBytes) < 0) {
ERRDRV("visor_memregion_resize failed: (status=0)\n");
rc = NULL;
goto Away;
}
p->size = channelBytes;
p->guid = guid;
rc = p;
Away:
if (rc == NULL) {
if (p != NULL) {
visorchannel_destroy(p);
p = NULL;
}
}
return rc;
}
/**
* mei_ioctl_connect_client - the connect to fw client IOCTL function
*
* @dev: the device structure
* @data: IOCTL connect data, input and output parameters
* @file: private data of the file object
*
* Locking: called under "dev->device_lock" lock
*
* returns 0 on success, <0 on failure.
*/
static int mei_ioctl_connect_client(struct file *file,
struct mei_connect_client_data *data)
{
struct mei_device *dev;
struct mei_client *client;
struct mei_cl *cl;
int i;
int rets;
cl = file->private_data;
if (WARN_ON(!cl || !cl->dev))
return -ENODEV;
dev = cl->dev;
if (dev->dev_state != MEI_DEV_ENABLED) {
rets = -ENODEV;
goto end;
}
if (cl->state != MEI_FILE_INITIALIZING &&
cl->state != MEI_FILE_DISCONNECTED) {
rets = -EBUSY;
goto end;
}
/* find ME client we're trying to connect to */
i = mei_me_cl_by_uuid(dev, &data->in_client_uuid);
if (i < 0 || dev->me_clients[i].props.fixed_address) {
dev_dbg(&dev->pdev->dev, "Cannot connect to FW Client UUID = %pUl\n",
&data->in_client_uuid);
rets = -ENOTTY;
goto end;
}
cl->me_client_id = dev->me_clients[i].client_id;
dev_dbg(&dev->pdev->dev, "Connect to FW Client ID = %d\n",
cl->me_client_id);
dev_dbg(&dev->pdev->dev, "FW Client - Protocol Version = %d\n",
dev->me_clients[i].props.protocol_version);
dev_dbg(&dev->pdev->dev, "FW Client - Max Msg Len = %d\n",
dev->me_clients[i].props.max_msg_length);
/* if we're connecting to amthif client then we will use the
* existing connection
*/
if (uuid_le_cmp(data->in_client_uuid, mei_amthif_guid) == 0) {
dev_dbg(&dev->pdev->dev, "FW Client is amthi\n");
if (dev->iamthif_cl.state != MEI_FILE_CONNECTED) {
rets = -ENODEV;
goto end;
}
mei_cl_unlink(cl);
kfree(cl);
cl = NULL;
dev->iamthif_open_count++;
file->private_data = &dev->iamthif_cl;
client = &data->out_client_properties;
client->max_msg_length =
dev->me_clients[i].props.max_msg_length;
client->protocol_version =
dev->me_clients[i].props.protocol_version;
rets = dev->iamthif_cl.status;
goto end;
}
/* prepare the output buffer */
client = &data->out_client_properties;
client->max_msg_length = dev->me_clients[i].props.max_msg_length;
client->protocol_version = dev->me_clients[i].props.protocol_version;
dev_dbg(&dev->pdev->dev, "Can connect?\n");
rets = mei_cl_connect(cl, file);
end:
return rets;
}
/**
* mei_ioctl_connect_client - the connect to fw client IOCTL function
*
* @file: private data of the file object
* @data: IOCTL connect data, input and output parameters
*
* Locking: called under "dev->device_lock" lock
*
* Return: 0 on success, <0 on failure.
*/
static int mei_ioctl_connect_client(struct file *file,
struct mei_connect_client_data *data)
{
struct mei_device *dev;
struct mei_client *client;
struct mei_me_client *me_cl;
struct mei_cl *cl;
int rets;
cl = file->private_data;
dev = cl->dev;
if (dev->dev_state != MEI_DEV_ENABLED)
return -ENODEV;
if (cl->state != MEI_FILE_INITIALIZING &&
cl->state != MEI_FILE_DISCONNECTED)
return -EBUSY;
/* find ME client we're trying to connect to */
me_cl = mei_me_cl_by_uuid(dev, &data->in_client_uuid);
if (!me_cl) {
dev_dbg(dev->dev, "Cannot connect to FW Client UUID = %pUl\n",
&data->in_client_uuid);
rets = -ENOTTY;
goto end;
}
if (me_cl->props.fixed_address) {
bool forbidden = dev->override_fixed_address ?
!dev->allow_fixed_address : !dev->hbm_f_fa_supported;
if (forbidden) {
dev_dbg(dev->dev, "Connection forbidden to FW Client UUID = %pUl\n",
&data->in_client_uuid);
rets = -ENOTTY;
goto end;
}
}
dev_dbg(dev->dev, "Connect to FW Client ID = %d\n",
me_cl->client_id);
dev_dbg(dev->dev, "FW Client - Protocol Version = %d\n",
me_cl->props.protocol_version);
dev_dbg(dev->dev, "FW Client - Max Msg Len = %d\n",
me_cl->props.max_msg_length);
/* if we're connecting to amthif client then we will use the
* existing connection
*/
if (uuid_le_cmp(data->in_client_uuid, mei_amthif_guid) == 0) {
dev_dbg(dev->dev, "FW Client is amthi\n");
if (!mei_cl_is_connected(&dev->iamthif_cl)) {
rets = -ENODEV;
goto end;
}
mei_cl_unlink(cl);
kfree(cl);
cl = NULL;
dev->iamthif_open_count++;
file->private_data = &dev->iamthif_cl;
client = &data->out_client_properties;
client->max_msg_length = me_cl->props.max_msg_length;
client->protocol_version = me_cl->props.protocol_version;
rets = dev->iamthif_cl.status;
goto end;
}
/* prepare the output buffer */
client = &data->out_client_properties;
client->max_msg_length = me_cl->props.max_msg_length;
client->protocol_version = me_cl->props.protocol_version;
dev_dbg(dev->dev, "Can connect?\n");
rets = mei_cl_connect(cl, me_cl, file);
end:
mei_me_cl_put(me_cl);
return rets;
}
/*
* visorchannel_create_guts() - creates the struct visorchannel abstraction
* for a data area in memory, but does NOT modify
* this data area
* @physaddr: physical address of start of channel
* @channel_bytes: size of the channel in bytes; this may 0 if the channel has
* already been initialized in memory (which is true for all
* channels provided to guest environments by the s-Par
* back-end), in which case the actual channel size will be
* read from the channel header in memory
* @gfp: gfp_t to use when allocating memory for the data struct
* @guid: uuid that identifies channel type; this may 0 if the channel
* has already been initialized in memory (which is true for all
* channels provided to guest environments by the s-Par
* back-end), in which case the actual channel guid will be
* read from the channel header in memory
* @needs_lock: must specify true if you have multiple threads of execution
* that will be calling visorchannel methods of this
* visorchannel at the same time
*
* Return: pointer to visorchannel that was created if successful,
* otherwise NULL
*/
static struct visorchannel *
visorchannel_create_guts(u64 physaddr, unsigned long channel_bytes,
gfp_t gfp, uuid_le guid, bool needs_lock)
{
struct visorchannel *channel;
int err;
size_t size = sizeof(struct channel_header);
if (physaddr == 0)
return NULL;
channel = kzalloc(sizeof(*channel), gfp);
if (!channel)
return NULL;
channel->needs_lock = needs_lock;
spin_lock_init(&channel->insert_lock);
spin_lock_init(&channel->remove_lock);
/*
* Video driver constains the efi framebuffer so it will get a
* conflict resource when requesting its full mem region. Since
* we are only using the efi framebuffer for video we can ignore
* this. Remember that we haven't requested it so we don't try to
* release later on.
*/
channel->requested = request_mem_region(physaddr, size, MYDRVNAME);
if (!channel->requested && uuid_le_cmp(guid, spar_video_guid))
/* we only care about errors if this is not the video channel */
goto err_destroy_channel;
channel->mapped = memremap(physaddr, size, MEMREMAP_WB);
if (!channel->mapped) {
release_mem_region(physaddr, size);
goto err_destroy_channel;
}
channel->physaddr = physaddr;
channel->nbytes = size;
err = visorchannel_read(channel, 0, &channel->chan_hdr,
sizeof(struct channel_header));
if (err)
goto err_destroy_channel;
/* we had better be a CLIENT of this channel */
if (channel_bytes == 0)
channel_bytes = (ulong)channel->chan_hdr.size;
if (uuid_le_cmp(guid, NULL_UUID_LE) == 0)
guid = channel->chan_hdr.chtype;
memunmap(channel->mapped);
if (channel->requested)
release_mem_region(channel->physaddr, channel->nbytes);
channel->mapped = NULL;
channel->requested = request_mem_region(channel->physaddr,
channel_bytes, MYDRVNAME);
if (!channel->requested && uuid_le_cmp(guid, spar_video_guid))
/* we only care about errors if this is not the video channel */
goto err_destroy_channel;
channel->mapped = memremap(channel->physaddr, channel_bytes,
MEMREMAP_WB);
if (!channel->mapped) {
release_mem_region(channel->physaddr, channel_bytes);
goto err_destroy_channel;
}
channel->nbytes = channel_bytes;
channel->guid = guid;
return channel;
err_destroy_channel:
visorchannel_destroy(channel);
return NULL;
}