Add Get/Set Response Message Limit commands.
Signed-off-by: Davidlohr Bueso <d...@stgolabs.net>
---
hw/cxl/cxl-mailbox-utils.c | 68 ++++++++++++++++++++++++++++++++++++--
1 file changed, 65 insertions(+), 3 deletions(-)
diff --git a/hw/cxl/cxl-mailbox-utils.c b/hw/cxl/cxl-mailbox-utils.c
index c2d776bc96eb..98416af794bb 100644
--- a/hw/cxl/cxl-mailbox-utils.c
+++ b/hw/cxl/cxl-mailbox-utils.c
@@ -7,6 +7,8 @@
* COPYING file in the top-level directory.
*/
+#include <math.h>
+
#include "qemu/osdep.h"
#include "hw/pci/msi.h"
#include "hw/pci/msix.h"
@@ -56,6 +58,8 @@ enum {
INFOSTAT = 0x00,
#define IS_IDENTIFY 0x1
#define BACKGROUND_OPERATION_STATUS 0x2
+ #define GET_RESPONSE_MSG_LIMIT 0x3
+ #define SET_RESPONSE_MSG_LIMIT 0x4
EVENTS = 0x01,
#define GET_RECORDS 0x0
#define CLEAR_RECORDS 0x1
@@ -393,7 +397,7 @@ static CXLRetCode cmd_infostat_identify(const struct
cxl_cmd *cmd,
uint16_t pcie_subsys_vid;
uint16_t pcie_subsys_id;
uint64_t sn;
- uint8_t max_message_size;
+ uint8_t max_message_size;
uint8_t component_type;
} QEMU_PACKED *is_identify;
QEMU_BUILD_BUG_ON(sizeof(*is_identify) != 18);
@@ -422,12 +426,58 @@ static CXLRetCode cmd_infostat_identify(const struct
cxl_cmd *cmd,
is_identify->component_type = 0x3; /* Type 3 */
}
- /* TODO: Allow this to vary across different CCIs */
- is_identify->max_message_size = 9; /* 512 bytes - MCTP_CXL_MAILBOX_BYTES */
+ is_identify->max_message_size = (uint8_t)log2(cci->payload_max);
*len_out = sizeof(*is_identify);
return CXL_MBOX_SUCCESS;
}
+/* CXL r3.1 section 8.2.9.1.3: Get Response Message Limit (Opcode 0003h) */
+static CXLRetCode cmd_get_response_msg_limit(const struct cxl_cmd *cmd,
+ uint8_t *payload_in,
+ size_t len_in,
+ uint8_t *payload_out,
+ size_t *len_out,
+ CXLCCI *cci)
+{
+ struct {
+ uint8_t rsp_limit;
+ } QEMU_PACKED *get_rsp_msg_limit = (void *)payload_out;
+ QEMU_BUILD_BUG_ON(sizeof(*get_rsp_msg_limit) != 1);
+
+ get_rsp_msg_limit->rsp_limit = (uint8_t)log2(cci->payload_max);
+
+ *len_out = sizeof(*get_rsp_msg_limit);
+ return CXL_MBOX_SUCCESS;
+}
+
+/* CXL r3.1 section 8.2.9.1.4: Set Response Message Limit (Opcode 0004h) */
+static CXLRetCode cmd_set_response_msg_limit(const struct cxl_cmd *cmd,
+ uint8_t *payload_in,
+ size_t len_in,
+ uint8_t *payload_out,
+ size_t *len_out,
+ CXLCCI *cci)
+{
+ struct {
+ uint8_t rsp_limit;
+ } QEMU_PACKED *in = (void *)payload_in;
+ QEMU_BUILD_BUG_ON(sizeof(*in) != 1);
+ struct {
+ uint8_t rsp_limit;
+ } QEMU_PACKED *out = (void *)payload_out;
+ QEMU_BUILD_BUG_ON(sizeof(*out) != 1);
+
+ if (in->rsp_limit < 8 || in->rsp_limit > 10) {
+ return CXL_MBOX_INVALID_INPUT;
+ }
+
+ cci->payload_max = 1 << in->rsp_limit;
+ out->rsp_limit = in->rsp_limit;
+
+ *len_out = sizeof(*out);
+ return CXL_MBOX_SUCCESS;
+}
+
static void cxl_set_dsp_active_bm(PCIBus *b, PCIDevice *d,
void *private)
{
@@ -3000,6 +3050,10 @@ void cxl_initialize_mailbox_t3(CXLCCI *cci, DeviceState
*d, size_t payload_max)
static const struct cxl_cmd cxl_cmd_set_t3_mctp[256][256] = {
[INFOSTAT][IS_IDENTIFY] = { "IDENTIFY", cmd_infostat_identify, 0, 0 },
+ [INFOSTAT][GET_RESPONSE_MSG_LIMIT] = { "GET_RESPONSE_MSG_LIMIT",
+ cmd_get_response_msg_limit, 0, 0 },
+ [INFOSTAT][SET_RESPONSE_MSG_LIMIT] = { "SET_RESPONSE_MSG_LIMIT",
+ cmd_set_response_msg_limit, 1, 0 },
[TIMESTAMP][GET] = { "TIMESTAMP_GET", cmd_timestamp_get, 0, 0 },
[LOGS][GET_SUPPORTED] = { "LOGS_GET_SUPPORTED", cmd_logs_get_supported, 0,
0 },
@@ -3035,6 +3089,10 @@ void cxl_initialize_t3_ld_cci(CXLCCI *cci, DeviceState
*d, DeviceState *intf,
static const struct cxl_cmd cxl_cmd_set_t3_fm_owned_ld_mctp[256][256] = {
[INFOSTAT][IS_IDENTIFY] = { "IDENTIFY", cmd_infostat_identify, 0, 0},
+ [INFOSTAT][GET_RESPONSE_MSG_LIMIT] = { "GET_RESPONSE_MSG_LIMIT",
+ cmd_get_response_msg_limit, 0, 0 },
+ [INFOSTAT][SET_RESPONSE_MSG_LIMIT] = { "SET_RESPONSE_MSG_LIMIT",
+ cmd_set_response_msg_limit, 1, 0 },
[LOGS][GET_SUPPORTED] = { "LOGS_GET_SUPPORTED", cmd_logs_get_supported, 0,
0 },
[LOGS][GET_LOG] = { "LOGS_GET_LOG", cmd_logs_get_log, 0x18, 0 },
@@ -3055,6 +3113,10 @@ void cxl_initialize_t3_fm_owned_ld_mctpcci(CXLCCI *cci,
DeviceState *d,
static const struct cxl_cmd cxl_cmd_set_usp_mctp[256][256] = {
[INFOSTAT][IS_IDENTIFY] = { "IDENTIFY", cmd_infostat_identify, 0, 0 },
+ [INFOSTAT][GET_RESPONSE_MSG_LIMIT] = { "GET_RESPONSE_MSG_LIMIT",
+ cmd_get_response_msg_limit, 0, 0 },
+ [INFOSTAT][SET_RESPONSE_MSG_LIMIT] = { "SET_RESPONSE_MSG_LIMIT",
+ cmd_set_response_msg_limit, 1, 0 },
[LOGS][GET_SUPPORTED] = { "LOGS_GET_SUPPORTED", cmd_logs_get_supported,
0, 0 },
[LOGS][GET_LOG] = { "LOGS_GET_LOG", cmd_logs_get_log, 0x18, 0 },
--
2.46.1
