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path: root/drivers/cxl/core/mbox.c
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Diffstat (limited to 'drivers/cxl/core/mbox.c')
-rw-r--r--drivers/cxl/core/mbox.c201
1 files changed, 130 insertions, 71 deletions
diff --git a/drivers/cxl/core/mbox.c b/drivers/cxl/core/mbox.c
index 9adda4795eb7..548564c770c0 100644
--- a/drivers/cxl/core/mbox.c
+++ b/drivers/cxl/core/mbox.c
@@ -4,7 +4,7 @@
#include <linux/debugfs.h>
#include <linux/ktime.h>
#include <linux/mutex.h>
-#include <asm/unaligned.h>
+#include <linux/unaligned.h>
#include <cxlpci.h>
#include <cxlmem.h>
#include <cxl.h>
@@ -56,6 +56,9 @@ static struct cxl_mem_command cxl_mem_commands[CXL_MEM_COMMAND_ID_MAX] = {
CXL_CMD(GET_LSA, 0x8, CXL_VARIABLE_PAYLOAD, 0),
CXL_CMD(GET_HEALTH_INFO, 0, 0x12, 0),
CXL_CMD(GET_LOG, 0x18, CXL_VARIABLE_PAYLOAD, CXL_CMD_FLAG_FORCE_ENABLE),
+ CXL_CMD(GET_LOG_CAPS, 0x10, 0x4, 0),
+ CXL_CMD(CLEAR_LOG, 0x10, 0, 0),
+ CXL_CMD(GET_SUP_LOG_SUBLIST, 0x2, CXL_VARIABLE_PAYLOAD, 0),
CXL_CMD(SET_PARTITION_INFO, 0x0a, 0, 0),
CXL_CMD(SET_LSA, CXL_VARIABLE_PAYLOAD, 0, 0),
CXL_CMD(GET_ALERT_CONFIG, 0, 0x10, 0),
@@ -222,7 +225,7 @@ static const char *cxl_mem_opcode_to_name(u16 opcode)
/**
* cxl_internal_send_cmd() - Kernel internal interface to send a mailbox command
- * @mds: The driver data for the operation
+ * @cxl_mbox: CXL mailbox context
* @mbox_cmd: initialized command to execute
*
* Context: Any context.
@@ -238,19 +241,19 @@ static const char *cxl_mem_opcode_to_name(u16 opcode)
* error. While this distinction can be useful for commands from userspace, the
* kernel will only be able to use results when both are successful.
*/
-int cxl_internal_send_cmd(struct cxl_memdev_state *mds,
+int cxl_internal_send_cmd(struct cxl_mailbox *cxl_mbox,
struct cxl_mbox_cmd *mbox_cmd)
{
size_t out_size, min_out;
int rc;
- if (mbox_cmd->size_in > mds->payload_size ||
- mbox_cmd->size_out > mds->payload_size)
+ if (mbox_cmd->size_in > cxl_mbox->payload_size ||
+ mbox_cmd->size_out > cxl_mbox->payload_size)
return -E2BIG;
out_size = mbox_cmd->size_out;
min_out = mbox_cmd->min_out;
- rc = mds->mbox_send(mds, mbox_cmd);
+ rc = cxl_mbox->mbox_send(cxl_mbox, mbox_cmd);
/*
* EIO is reserved for a payload size mismatch and mbox_send()
* may not return this error.
@@ -278,7 +281,7 @@ int cxl_internal_send_cmd(struct cxl_memdev_state *mds,
return -EIO;
return 0;
}
-EXPORT_SYMBOL_NS_GPL(cxl_internal_send_cmd, CXL);
+EXPORT_SYMBOL_NS_GPL(cxl_internal_send_cmd, "CXL");
static bool cxl_mem_raw_command_allowed(u16 opcode)
{
@@ -331,6 +334,15 @@ static bool cxl_payload_from_user_allowed(u16 opcode, void *payload_in)
return false;
break;
}
+ case CXL_MBOX_OP_CLEAR_LOG: {
+ const uuid_t *uuid = (uuid_t *)payload_in;
+
+ /*
+ * Restrict the ‘Clear log’ action to only apply to
+ * Vendor debug logs.
+ */
+ return uuid_equal(uuid, &DEFINE_CXL_VENDOR_DEBUG_UUID);
+ }
default:
break;
}
@@ -341,6 +353,7 @@ static int cxl_mbox_cmd_ctor(struct cxl_mbox_cmd *mbox,
struct cxl_memdev_state *mds, u16 opcode,
size_t in_size, size_t out_size, u64 in_payload)
{
+ struct cxl_mailbox *cxl_mbox = &mds->cxlds.cxl_mbox;
*mbox = (struct cxl_mbox_cmd) {
.opcode = opcode,
.size_in = in_size,
@@ -362,7 +375,7 @@ static int cxl_mbox_cmd_ctor(struct cxl_mbox_cmd *mbox,
/* Prepare to handle a full payload for variable sized output */
if (out_size == CXL_VARIABLE_PAYLOAD)
- mbox->size_out = mds->payload_size;
+ mbox->size_out = cxl_mbox->payload_size;
else
mbox->size_out = out_size;
@@ -386,6 +399,8 @@ static int cxl_to_mem_cmd_raw(struct cxl_mem_command *mem_cmd,
const struct cxl_send_command *send_cmd,
struct cxl_memdev_state *mds)
{
+ struct cxl_mailbox *cxl_mbox = &mds->cxlds.cxl_mbox;
+
if (send_cmd->raw.rsvd)
return -EINVAL;
@@ -394,7 +409,7 @@ static int cxl_to_mem_cmd_raw(struct cxl_mem_command *mem_cmd,
* gets passed along without further checking, so it must be
* validated here.
*/
- if (send_cmd->out.size > mds->payload_size)
+ if (send_cmd->out.size > cxl_mbox->payload_size)
return -EINVAL;
if (!cxl_mem_raw_command_allowed(send_cmd->raw.opcode))
@@ -482,6 +497,7 @@ static int cxl_validate_cmd_from_user(struct cxl_mbox_cmd *mbox_cmd,
struct cxl_memdev_state *mds,
const struct cxl_send_command *send_cmd)
{
+ struct cxl_mailbox *cxl_mbox = &mds->cxlds.cxl_mbox;
struct cxl_mem_command mem_cmd;
int rc;
@@ -493,7 +509,7 @@ static int cxl_validate_cmd_from_user(struct cxl_mbox_cmd *mbox_cmd,
* supports, but output can be arbitrarily large (simply write out as
* much data as the hardware provides).
*/
- if (send_cmd->in.size > mds->payload_size)
+ if (send_cmd->in.size > cxl_mbox->payload_size)
return -EINVAL;
/* Sanitize and construct a cxl_mem_command */
@@ -530,7 +546,7 @@ int cxl_query_cmd(struct cxl_memdev *cxlmd,
return put_user(ARRAY_SIZE(cxl_mem_commands), &q->n_commands);
/*
- * otherwise, return max(n_commands, total commands) cxl_command_info
+ * otherwise, return min(n_commands, total commands) cxl_command_info
* structures.
*/
cxl_for_each_cmd(cmd) {
@@ -579,6 +595,7 @@ static int handle_mailbox_cmd_from_user(struct cxl_memdev_state *mds,
u64 out_payload, s32 *size_out,
u32 *retval)
{
+ struct cxl_mailbox *cxl_mbox = &mds->cxlds.cxl_mbox;
struct device *dev = mds->cxlds.dev;
int rc;
@@ -589,7 +606,7 @@ static int handle_mailbox_cmd_from_user(struct cxl_memdev_state *mds,
cxl_mem_opcode_to_name(mbox_cmd->opcode),
mbox_cmd->opcode, mbox_cmd->size_in);
- rc = mds->mbox_send(mds, mbox_cmd);
+ rc = cxl_mbox->mbox_send(cxl_mbox, mbox_cmd);
if (rc)
goto out;
@@ -647,11 +664,12 @@ int cxl_send_cmd(struct cxl_memdev *cxlmd, struct cxl_send_command __user *s)
static int cxl_xfer_log(struct cxl_memdev_state *mds, uuid_t *uuid,
u32 *size, u8 *out)
{
+ struct cxl_mailbox *cxl_mbox = &mds->cxlds.cxl_mbox;
u32 remaining = *size;
u32 offset = 0;
while (remaining) {
- u32 xfer_size = min_t(u32, remaining, mds->payload_size);
+ u32 xfer_size = min_t(u32, remaining, cxl_mbox->payload_size);
struct cxl_mbox_cmd mbox_cmd;
struct cxl_mbox_get_log log;
int rc;
@@ -670,7 +688,7 @@ static int cxl_xfer_log(struct cxl_memdev_state *mds, uuid_t *uuid,
.payload_out = out,
};
- rc = cxl_internal_send_cmd(mds, &mbox_cmd);
+ rc = cxl_internal_send_cmd(cxl_mbox, &mbox_cmd);
/*
* The output payload length that indicates the number
@@ -740,22 +758,23 @@ static void cxl_walk_cel(struct cxl_memdev_state *mds, size_t size, u8 *cel)
static struct cxl_mbox_get_supported_logs *cxl_get_gsl(struct cxl_memdev_state *mds)
{
+ struct cxl_mailbox *cxl_mbox = &mds->cxlds.cxl_mbox;
struct cxl_mbox_get_supported_logs *ret;
struct cxl_mbox_cmd mbox_cmd;
int rc;
- ret = kvmalloc(mds->payload_size, GFP_KERNEL);
+ ret = kvmalloc(cxl_mbox->payload_size, GFP_KERNEL);
if (!ret)
return ERR_PTR(-ENOMEM);
mbox_cmd = (struct cxl_mbox_cmd) {
.opcode = CXL_MBOX_OP_GET_SUPPORTED_LOGS,
- .size_out = mds->payload_size,
+ .size_out = cxl_mbox->payload_size,
.payload_out = ret,
/* At least the record number field must be valid */
.min_out = 2,
};
- rc = cxl_internal_send_cmd(mds, &mbox_cmd);
+ rc = cxl_internal_send_cmd(cxl_mbox, &mbox_cmd);
if (rc < 0) {
kvfree(ret);
return ERR_PTR(rc);
@@ -835,23 +854,47 @@ out:
kvfree(gsl);
return rc;
}
-EXPORT_SYMBOL_NS_GPL(cxl_enumerate_cmds, CXL);
+EXPORT_SYMBOL_NS_GPL(cxl_enumerate_cmds, "CXL");
void cxl_event_trace_record(const struct cxl_memdev *cxlmd,
enum cxl_event_log_type type,
enum cxl_event_type event_type,
const uuid_t *uuid, union cxl_event *evt)
{
- if (event_type == CXL_CPER_EVENT_GEN_MEDIA)
- trace_cxl_general_media(cxlmd, type, &evt->gen_media);
- else if (event_type == CXL_CPER_EVENT_DRAM)
- trace_cxl_dram(cxlmd, type, &evt->dram);
- else if (event_type == CXL_CPER_EVENT_MEM_MODULE)
+ if (event_type == CXL_CPER_EVENT_MEM_MODULE) {
trace_cxl_memory_module(cxlmd, type, &evt->mem_module);
- else
+ return;
+ }
+ if (event_type == CXL_CPER_EVENT_GENERIC) {
trace_cxl_generic_event(cxlmd, type, uuid, &evt->generic);
+ return;
+ }
+
+ if (trace_cxl_general_media_enabled() || trace_cxl_dram_enabled()) {
+ u64 dpa, hpa = ULLONG_MAX;
+ struct cxl_region *cxlr;
+
+ /*
+ * These trace points are annotated with HPA and region
+ * translations. Take topology mutation locks and lookup
+ * { HPA, REGION } from { DPA, MEMDEV } in the event record.
+ */
+ guard(rwsem_read)(&cxl_region_rwsem);
+ guard(rwsem_read)(&cxl_dpa_rwsem);
+
+ dpa = le64_to_cpu(evt->media_hdr.phys_addr) & CXL_DPA_MASK;
+ cxlr = cxl_dpa_to_region(cxlmd, dpa);
+ if (cxlr)
+ hpa = cxl_dpa_to_hpa(cxlr, cxlmd, dpa);
+
+ if (event_type == CXL_CPER_EVENT_GEN_MEDIA)
+ trace_cxl_general_media(cxlmd, type, cxlr, hpa,
+ &evt->gen_media);
+ else if (event_type == CXL_CPER_EVENT_DRAM)
+ trace_cxl_dram(cxlmd, type, cxlr, hpa, &evt->dram);
+ }
}
-EXPORT_SYMBOL_NS_GPL(cxl_event_trace_record, CXL);
+EXPORT_SYMBOL_NS_GPL(cxl_event_trace_record, "CXL");
static void __cxl_event_trace_record(const struct cxl_memdev *cxlmd,
enum cxl_event_log_type type,
@@ -874,6 +917,7 @@ static int cxl_clear_event_record(struct cxl_memdev_state *mds,
enum cxl_event_log_type log,
struct cxl_get_event_payload *get_pl)
{
+ struct cxl_mailbox *cxl_mbox = &mds->cxlds.cxl_mbox;
struct cxl_mbox_clear_event_payload *payload;
u16 total = le16_to_cpu(get_pl->record_count);
u8 max_handles = CXL_CLEAR_EVENT_MAX_HANDLES;
@@ -884,8 +928,8 @@ static int cxl_clear_event_record(struct cxl_memdev_state *mds,
int i;
/* Payload size may limit the max handles */
- if (pl_size > mds->payload_size) {
- max_handles = (mds->payload_size - sizeof(*payload)) /
+ if (pl_size > cxl_mbox->payload_size) {
+ max_handles = (cxl_mbox->payload_size - sizeof(*payload)) /
sizeof(__le16);
pl_size = struct_size(payload, handles, max_handles);
}
@@ -915,11 +959,11 @@ static int cxl_clear_event_record(struct cxl_memdev_state *mds,
payload->handles[i++] = gen->hdr.handle;
dev_dbg(mds->cxlds.dev, "Event log '%d': Clearing %u\n", log,
- le16_to_cpu(payload->handles[i]));
+ le16_to_cpu(payload->handles[i - 1]));
if (i == max_handles) {
payload->nr_recs = i;
- rc = cxl_internal_send_cmd(mds, &mbox_cmd);
+ rc = cxl_internal_send_cmd(cxl_mbox, &mbox_cmd);
if (rc)
goto free_pl;
i = 0;
@@ -930,7 +974,7 @@ static int cxl_clear_event_record(struct cxl_memdev_state *mds,
if (i) {
payload->nr_recs = i;
mbox_cmd.size_in = struct_size(payload, handles, i);
- rc = cxl_internal_send_cmd(mds, &mbox_cmd);
+ rc = cxl_internal_send_cmd(cxl_mbox, &mbox_cmd);
if (rc)
goto free_pl;
}
@@ -943,29 +987,28 @@ free_pl:
static void cxl_mem_get_records_log(struct cxl_memdev_state *mds,
enum cxl_event_log_type type)
{
+ struct cxl_mailbox *cxl_mbox = &mds->cxlds.cxl_mbox;
struct cxl_memdev *cxlmd = mds->cxlds.cxlmd;
struct device *dev = mds->cxlds.dev;
struct cxl_get_event_payload *payload;
- struct cxl_mbox_cmd mbox_cmd;
u8 log_type = type;
u16 nr_rec;
mutex_lock(&mds->event.log_lock);
payload = mds->event.buf;
- mbox_cmd = (struct cxl_mbox_cmd) {
- .opcode = CXL_MBOX_OP_GET_EVENT_RECORD,
- .payload_in = &log_type,
- .size_in = sizeof(log_type),
- .payload_out = payload,
- .size_out = mds->payload_size,
- .min_out = struct_size(payload, records, 0),
- };
-
do {
int rc, i;
+ struct cxl_mbox_cmd mbox_cmd = (struct cxl_mbox_cmd) {
+ .opcode = CXL_MBOX_OP_GET_EVENT_RECORD,
+ .payload_in = &log_type,
+ .size_in = sizeof(log_type),
+ .payload_out = payload,
+ .size_out = cxl_mbox->payload_size,
+ .min_out = struct_size(payload, records, 0),
+ };
- rc = cxl_internal_send_cmd(mds, &mbox_cmd);
+ rc = cxl_internal_send_cmd(cxl_mbox, &mbox_cmd);
if (rc) {
dev_err_ratelimited(dev,
"Event log '%d': Failed to query event records : %d",
@@ -1020,7 +1063,7 @@ void cxl_mem_get_event_records(struct cxl_memdev_state *mds, u32 status)
if (status & CXLDEV_EVENT_STATUS_INFO)
cxl_mem_get_records_log(mds, CXL_EVENT_TYPE_INFO);
}
-EXPORT_SYMBOL_NS_GPL(cxl_mem_get_event_records, CXL);
+EXPORT_SYMBOL_NS_GPL(cxl_mem_get_event_records, "CXL");
/**
* cxl_mem_get_partition_info - Get partition info
@@ -1036,6 +1079,7 @@ EXPORT_SYMBOL_NS_GPL(cxl_mem_get_event_records, CXL);
*/
static int cxl_mem_get_partition_info(struct cxl_memdev_state *mds)
{
+ struct cxl_mailbox *cxl_mbox = &mds->cxlds.cxl_mbox;
struct cxl_mbox_get_partition_info pi;
struct cxl_mbox_cmd mbox_cmd;
int rc;
@@ -1045,7 +1089,7 @@ static int cxl_mem_get_partition_info(struct cxl_memdev_state *mds)
.size_out = sizeof(pi),
.payload_out = &pi,
};
- rc = cxl_internal_send_cmd(mds, &mbox_cmd);
+ rc = cxl_internal_send_cmd(cxl_mbox, &mbox_cmd);
if (rc)
return rc;
@@ -1072,6 +1116,7 @@ static int cxl_mem_get_partition_info(struct cxl_memdev_state *mds)
*/
int cxl_dev_state_identify(struct cxl_memdev_state *mds)
{
+ struct cxl_mailbox *cxl_mbox = &mds->cxlds.cxl_mbox;
/* See CXL 2.0 Table 175 Identify Memory Device Output Payload */
struct cxl_mbox_identify id;
struct cxl_mbox_cmd mbox_cmd;
@@ -1086,7 +1131,7 @@ int cxl_dev_state_identify(struct cxl_memdev_state *mds)
.size_out = sizeof(id),
.payload_out = &id,
};
- rc = cxl_internal_send_cmd(mds, &mbox_cmd);
+ rc = cxl_internal_send_cmd(cxl_mbox, &mbox_cmd);
if (rc < 0)
return rc;
@@ -1110,10 +1155,11 @@ int cxl_dev_state_identify(struct cxl_memdev_state *mds)
return 0;
}
-EXPORT_SYMBOL_NS_GPL(cxl_dev_state_identify, CXL);
+EXPORT_SYMBOL_NS_GPL(cxl_dev_state_identify, "CXL");
static int __cxl_mem_sanitize(struct cxl_memdev_state *mds, u16 cmd)
{
+ struct cxl_mailbox *cxl_mbox = &mds->cxlds.cxl_mbox;
int rc;
u32 sec_out = 0;
struct cxl_get_security_output {
@@ -1125,14 +1171,13 @@ static int __cxl_mem_sanitize(struct cxl_memdev_state *mds, u16 cmd)
.size_out = sizeof(out),
};
struct cxl_mbox_cmd mbox_cmd = { .opcode = cmd };
- struct cxl_dev_state *cxlds = &mds->cxlds;
if (cmd != CXL_MBOX_OP_SANITIZE && cmd != CXL_MBOX_OP_SECURE_ERASE)
return -EINVAL;
- rc = cxl_internal_send_cmd(mds, &sec_cmd);
+ rc = cxl_internal_send_cmd(cxl_mbox, &sec_cmd);
if (rc < 0) {
- dev_err(cxlds->dev, "Failed to get security state : %d", rc);
+ dev_err(cxl_mbox->host, "Failed to get security state : %d", rc);
return rc;
}
@@ -1149,9 +1194,9 @@ static int __cxl_mem_sanitize(struct cxl_memdev_state *mds, u16 cmd)
sec_out & CXL_PMEM_SEC_STATE_LOCKED)
return -EINVAL;
- rc = cxl_internal_send_cmd(mds, &mbox_cmd);
+ rc = cxl_internal_send_cmd(cxl_mbox, &mbox_cmd);
if (rc < 0) {
- dev_err(cxlds->dev, "Failed to sanitize device : %d", rc);
+ dev_err(cxl_mbox->host, "Failed to sanitize device : %d", rc);
return rc;
}
@@ -1180,7 +1225,7 @@ int cxl_mem_sanitize(struct cxl_memdev *cxlmd, u16 cmd)
int rc;
/* synchronize with cxl_mem_probe() and decoder write operations */
- device_lock(&cxlmd->dev);
+ guard(device)(&cxlmd->dev);
endpoint = cxlmd->endpoint;
down_read(&cxl_region_rwsem);
/*
@@ -1192,7 +1237,6 @@ int cxl_mem_sanitize(struct cxl_memdev *cxlmd, u16 cmd)
else
rc = -EBUSY;
up_read(&cxl_region_rwsem);
- device_unlock(&cxlmd->dev);
return rc;
}
@@ -1262,10 +1306,11 @@ int cxl_mem_create_range_info(struct cxl_memdev_state *mds)
mds->active_volatile_bytes,
mds->active_persistent_bytes, "pmem");
}
-EXPORT_SYMBOL_NS_GPL(cxl_mem_create_range_info, CXL);
+EXPORT_SYMBOL_NS_GPL(cxl_mem_create_range_info, "CXL");
int cxl_set_timestamp(struct cxl_memdev_state *mds)
{
+ struct cxl_mailbox *cxl_mbox = &mds->cxlds.cxl_mbox;
struct cxl_mbox_cmd mbox_cmd;
struct cxl_mbox_set_timestamp_in pi;
int rc;
@@ -1277,7 +1322,7 @@ int cxl_set_timestamp(struct cxl_memdev_state *mds)
.payload_in = &pi,
};
- rc = cxl_internal_send_cmd(mds, &mbox_cmd);
+ rc = cxl_internal_send_cmd(cxl_mbox, &mbox_cmd);
/*
* Command is optional. Devices may have another way of providing
* a timestamp, or may return all 0s in timestamp fields.
@@ -1288,15 +1333,15 @@ int cxl_set_timestamp(struct cxl_memdev_state *mds)
return 0;
}
-EXPORT_SYMBOL_NS_GPL(cxl_set_timestamp, CXL);
+EXPORT_SYMBOL_NS_GPL(cxl_set_timestamp, "CXL");
int cxl_mem_get_poison(struct cxl_memdev *cxlmd, u64 offset, u64 len,
struct cxl_region *cxlr)
{
struct cxl_memdev_state *mds = to_cxl_memdev_state(cxlmd->cxlds);
+ struct cxl_mailbox *cxl_mbox = &cxlmd->cxlds->cxl_mbox;
struct cxl_mbox_poison_out *po;
struct cxl_mbox_poison_in pi;
- struct cxl_mbox_cmd mbox_cmd;
int nr_records = 0;
int rc;
@@ -1308,17 +1353,17 @@ int cxl_mem_get_poison(struct cxl_memdev *cxlmd, u64 offset, u64 len,
pi.offset = cpu_to_le64(offset);
pi.length = cpu_to_le64(len / CXL_POISON_LEN_MULT);
- mbox_cmd = (struct cxl_mbox_cmd) {
- .opcode = CXL_MBOX_OP_GET_POISON,
- .size_in = sizeof(pi),
- .payload_in = &pi,
- .size_out = mds->payload_size,
- .payload_out = po,
- .min_out = struct_size(po, record, 0),
- };
-
do {
- rc = cxl_internal_send_cmd(mds, &mbox_cmd);
+ struct cxl_mbox_cmd mbox_cmd = (struct cxl_mbox_cmd){
+ .opcode = CXL_MBOX_OP_GET_POISON,
+ .size_in = sizeof(pi),
+ .payload_in = &pi,
+ .size_out = cxl_mbox->payload_size,
+ .payload_out = po,
+ .min_out = struct_size(po, record, 0),
+ };
+
+ rc = cxl_internal_send_cmd(cxl_mbox, &mbox_cmd);
if (rc)
break;
@@ -1339,7 +1384,7 @@ int cxl_mem_get_poison(struct cxl_memdev *cxlmd, u64 offset, u64 len,
mutex_unlock(&mds->poison.lock);
return rc;
}
-EXPORT_SYMBOL_NS_GPL(cxl_mem_get_poison, CXL);
+EXPORT_SYMBOL_NS_GPL(cxl_mem_get_poison, "CXL");
static void free_poison_buf(void *buf)
{
@@ -1349,7 +1394,9 @@ static void free_poison_buf(void *buf)
/* Get Poison List output buffer is protected by mds->poison.lock */
static int cxl_poison_alloc_buf(struct cxl_memdev_state *mds)
{
- mds->poison.list_out = kvmalloc(mds->payload_size, GFP_KERNEL);
+ struct cxl_mailbox *cxl_mbox = &mds->cxlds.cxl_mbox;
+
+ mds->poison.list_out = kvmalloc(cxl_mbox->payload_size, GFP_KERNEL);
if (!mds->poison.list_out)
return -ENOMEM;
@@ -1373,7 +1420,20 @@ int cxl_poison_state_init(struct cxl_memdev_state *mds)
mutex_init(&mds->poison.lock);
return 0;
}
-EXPORT_SYMBOL_NS_GPL(cxl_poison_state_init, CXL);
+EXPORT_SYMBOL_NS_GPL(cxl_poison_state_init, "CXL");
+
+int cxl_mailbox_init(struct cxl_mailbox *cxl_mbox, struct device *host)
+{
+ if (!cxl_mbox || !host)
+ return -EINVAL;
+
+ cxl_mbox->host = host;
+ mutex_init(&cxl_mbox->mbox_mutex);
+ rcuwait_init(&cxl_mbox->mbox_wait);
+
+ return 0;
+}
+EXPORT_SYMBOL_NS_GPL(cxl_mailbox_init, "CXL");
struct cxl_memdev_state *cxl_memdev_state_create(struct device *dev)
{
@@ -1385,7 +1445,6 @@ struct cxl_memdev_state *cxl_memdev_state_create(struct device *dev)
return ERR_PTR(-ENOMEM);
}
- mutex_init(&mds->mbox_mutex);
mutex_init(&mds->event.log_lock);
mds->cxlds.dev = dev;
mds->cxlds.reg_map.host = dev;
@@ -1396,7 +1455,7 @@ struct cxl_memdev_state *cxl_memdev_state_create(struct device *dev)
return mds;
}
-EXPORT_SYMBOL_NS_GPL(cxl_memdev_state_create, CXL);
+EXPORT_SYMBOL_NS_GPL(cxl_memdev_state_create, "CXL");
void __init cxl_mbox_init(void)
{
generated by cgit (git 2.34.1) at 2025-07-25 18:43:54 +0000