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qemu/hw/cxl/cxl-mailbox-utils.c
Jonathan Cameron 004e3a93b8 hw/cxl: Add tunneled command support to mailbox for switch cci. 
This implementation of tunneling makes the choice that our Type 3 device is
a Logical Device (LD) of a Multi-Logical Device (MLD) that just happens to
only have one LD for now.

Tunneling is supported from a Switch Mailbox CCI (and shortly via MCTP over
I2C connected to the switch MCTP CCI) via an outer level to the FM owned LD
in the MLD Type 3 device. From there an inner tunnel may be used to access
particular LDs.

Protocol wise, the following is what happens in a real system but we
don't emulate the transports - just the destinations and the payloads.

( Host -> Switch Mailbox CCI - in band FM-API mailbox command
  or
  Host -> Switch MCTP CCI - MCTP over I2C using the CXL FM-API
  MCTP Binding.
)
then (if a tunnel command)
Switch -> Type 3 FM Owned LD - MCTP over PCI VDM using the
CXL FM-API binding (addressed by switch port)
then (if unwrapped command also a tunnel command)
Type 3 FM Owned LD to LD0 via internal transport
(addressed by LD number)

or (added shortly)

Host to Type 3 FM Owned MCTP CCI - MCTP over I2C using the
CXL FM-API MCTP Binding.
then (if unwrapped comand is a tunnel comamnd)
Type 3 FM Owned LD to LD0 via internal transport.
(addressed by LD number)

It is worth noting that the tunneling commands over PCI VDM
presumably use the appropriate MCTP binding depending on opcode.
This may be the CXL FMAPI binding or the CXL Memory Device Binding.

Additional commands will need to be added to make this
useful beyond testing the tunneling works.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Message-Id: <20231023160806.13206-18-Jonathan.Cameron@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-11-07 03:39:11 -05:00

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/*
* CXL Utility library for mailbox interface
*
* Copyright(C) 2020 Intel Corporation.
*
* This work is licensed under the terms of the GNU GPL, version 2. See the
* COPYING file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "hw/pci/msi.h"
#include "hw/pci/msix.h"
#include "hw/cxl/cxl.h"
#include "hw/cxl/cxl_events.h"
#include "hw/pci/pci.h"
#include "hw/pci-bridge/cxl_upstream_port.h"
#include "qemu/cutils.h"
#include "qemu/log.h"
#include "qemu/units.h"
#include "qemu/uuid.h"
#include "sysemu/hostmem.h"
#define CXL_CAPACITY_MULTIPLIER (256 * MiB)
/*
* How to add a new command, example. The command set FOO, with cmd BAR.
* 1. Add the command set and cmd to the enum.
* FOO = 0x7f,
* #define BAR 0
* 2. Implement the handler
* static CXLRetCode cmd_foo_bar(struct cxl_cmd *cmd,
* CXLDeviceState *cxl_dstate, uint16_t *len)
* 3. Add the command to the cxl_cmd_set[][]
* [FOO][BAR] = { "FOO_BAR", cmd_foo_bar, x, y },
* 4. Implement your handler
* define_mailbox_handler(FOO_BAR) { ... return CXL_MBOX_SUCCESS; }
*
*
* Writing the handler:
* The handler will provide the &struct cxl_cmd, the &CXLDeviceState, and the
* in/out length of the payload. The handler is responsible for consuming the
* payload from cmd->payload and operating upon it as necessary. It must then
* fill the output data into cmd->payload (overwriting what was there),
* setting the length, and returning a valid return code.
*
* XXX: The handler need not worry about endianness. The payload is read out of
* a register interface that already deals with it.
*/
enum {
INFOSTAT = 0x00,
#define IS_IDENTIFY 0x1
#define BACKGROUND_OPERATION_STATUS 0x2
EVENTS = 0x01,
#define GET_RECORDS 0x0
#define CLEAR_RECORDS 0x1
#define GET_INTERRUPT_POLICY 0x2
#define SET_INTERRUPT_POLICY 0x3
FIRMWARE_UPDATE = 0x02,
#define GET_INFO 0x0
TIMESTAMP = 0x03,
#define GET 0x0
#define SET 0x1
LOGS = 0x04,
#define GET_SUPPORTED 0x0
#define GET_LOG 0x1
IDENTIFY = 0x40,
#define MEMORY_DEVICE 0x0
CCLS = 0x41,
#define GET_PARTITION_INFO 0x0
#define GET_LSA 0x2
#define SET_LSA 0x3
SANITIZE = 0x44,
#define OVERWRITE 0x0
#define SECURE_ERASE 0x1
PERSISTENT_MEM = 0x45,
#define GET_SECURITY_STATE 0x0
MEDIA_AND_POISON = 0x43,
#define GET_POISON_LIST 0x0
#define INJECT_POISON 0x1
#define CLEAR_POISON 0x2
PHYSICAL_SWITCH = 0x51,
#define IDENTIFY_SWITCH_DEVICE 0x0
#define GET_PHYSICAL_PORT_STATE 0x1
TUNNEL = 0x53,
#define MANAGEMENT_COMMAND 0x0
};
/* CCI Message Format CXL r3.0 Figure 7-19 */
typedef struct CXLCCIMessage {
uint8_t category;
#define CXL_CCI_CAT_REQ 0
#define CXL_CCI_CAT_RSP 1
uint8_t tag;
uint8_t resv1;
uint8_t command;
uint8_t command_set;
uint8_t pl_length[3];
uint16_t rc;
uint16_t vendor_specific;
uint8_t payload[];
} QEMU_PACKED CXLCCIMessage;
/* This command is only defined to an MLD FM Owned LD or an MHD */
static CXLRetCode cmd_tunnel_management_cmd(const struct cxl_cmd *cmd,
uint8_t *payload_in,
size_t len_in,
uint8_t *payload_out,
size_t *len_out,
CXLCCI *cci)
{
PCIDevice *tunnel_target;
CXLCCI *target_cci;
struct {
uint8_t port_or_ld_id;
uint8_t target_type;
uint16_t size;
CXLCCIMessage ccimessage;
} QEMU_PACKED *in;
struct {
uint16_t resp_len;
uint8_t resv[2];
CXLCCIMessage ccimessage;
} QEMU_PACKED *out;
size_t pl_length, length_out;
bool bg_started;
int rc;
if (cmd->in < sizeof(*in)) {
return CXL_MBOX_INVALID_INPUT;
}
in = (void *)payload_in;
out = (void *)payload_out;
/* Enough room for minimum sized message - no payload */
if (in->size < sizeof(in->ccimessage)) {
return CXL_MBOX_INVALID_PAYLOAD_LENGTH;
}
/* Length of input payload should be in->size + a wrapping tunnel header */
if (in->size != len_in - offsetof(typeof(*out), ccimessage)) {
return CXL_MBOX_INVALID_PAYLOAD_LENGTH;
}
if (in->ccimessage.category != CXL_CCI_CAT_REQ) {
return CXL_MBOX_INVALID_INPUT;
}
if (in->target_type != 0) {
qemu_log_mask(LOG_UNIMP,
"Tunneled Command sent to non existent FM-LD");
return CXL_MBOX_INVALID_INPUT;
}
/*
* Target of a tunnel unfortunately depends on type of CCI readint
* the message.
* If in a switch, then it's the port number.
* If in an MLD it is the ld number.
* If in an MHD target type indicate where we are going.
*/
if (object_dynamic_cast(OBJECT(cci->d), TYPE_CXL_TYPE3)) {
CXLType3Dev *ct3d = CXL_TYPE3(cci->d);
if (in->port_or_ld_id != 0) {
/* Only pretending to have one for now! */
return CXL_MBOX_INVALID_INPUT;
}
target_cci = &ct3d->ld0_cci;
} else if (object_dynamic_cast(OBJECT(cci->d), TYPE_CXL_USP)) {
CXLUpstreamPort *usp = CXL_USP(cci->d);
tunnel_target = pcie_find_port_by_pn(&PCI_BRIDGE(usp)->sec_bus,
in->port_or_ld_id);
if (!tunnel_target) {
return CXL_MBOX_INVALID_INPUT;
}
tunnel_target =
pci_bridge_get_sec_bus(PCI_BRIDGE(tunnel_target))->devices[0];
if (!tunnel_target) {
return CXL_MBOX_INVALID_INPUT;
}
if (object_dynamic_cast(OBJECT(tunnel_target), TYPE_CXL_TYPE3)) {
CXLType3Dev *ct3d = CXL_TYPE3(tunnel_target);
/* Tunneled VDMs always land on FM Owned LD */
target_cci = &ct3d->vdm_fm_owned_ld_mctp_cci;
} else {
return CXL_MBOX_INVALID_INPUT;
}
} else {
return CXL_MBOX_INVALID_INPUT;
}
pl_length = in->ccimessage.pl_length[2] << 16 |
in->ccimessage.pl_length[1] << 8 | in->ccimessage.pl_length[0];
rc = cxl_process_cci_message(target_cci,
in->ccimessage.command_set,
in->ccimessage.command,
pl_length, in->ccimessage.payload,
&length_out, out->ccimessage.payload,
&bg_started);
/* Payload should be in place. Rest of CCI header and needs filling */
out->resp_len = length_out + sizeof(CXLCCIMessage);
st24_le_p(out->ccimessage.pl_length, length_out);
out->ccimessage.rc = rc;
out->ccimessage.category = CXL_CCI_CAT_RSP;
out->ccimessage.command = in->ccimessage.command;
out->ccimessage.command_set = in->ccimessage.command_set;
out->ccimessage.tag = in->ccimessage.tag;
*len_out = length_out + sizeof(*out);
return CXL_MBOX_SUCCESS;
}
static CXLRetCode cmd_events_get_records(const struct cxl_cmd *cmd,
uint8_t *payload_in, size_t len_in,
uint8_t *payload_out, size_t *len_out,
CXLCCI *cci)
{
CXLDeviceState *cxlds = &CXL_TYPE3(cci->d)->cxl_dstate;
CXLGetEventPayload *pl;
uint8_t log_type;
int max_recs;
if (cmd->in < sizeof(log_type)) {
return CXL_MBOX_INVALID_INPUT;
}
log_type = payload_in[0];
pl = (CXLGetEventPayload *)payload_out;
memset(pl, 0, sizeof(*pl));
max_recs = (cxlds->payload_size - CXL_EVENT_PAYLOAD_HDR_SIZE) /
CXL_EVENT_RECORD_SIZE;
if (max_recs > 0xFFFF) {
max_recs = 0xFFFF;
}
return cxl_event_get_records(cxlds, pl, log_type, max_recs, len_out);
}
static CXLRetCode cmd_events_clear_records(const struct cxl_cmd *cmd,
uint8_t *payload_in,
size_t len_in,
uint8_t *payload_out,
size_t *len_out,
CXLCCI *cci)
{
CXLDeviceState *cxlds = &CXL_TYPE3(cci->d)->cxl_dstate;
CXLClearEventPayload *pl;
pl = (CXLClearEventPayload *)payload_in;
*len_out = 0;
return cxl_event_clear_records(cxlds, pl);
}
static CXLRetCode cmd_events_get_interrupt_policy(const struct cxl_cmd *cmd,
uint8_t *payload_in,
size_t len_in,
uint8_t *payload_out,
size_t *len_out,
CXLCCI *cci)
{
CXLDeviceState *cxlds = &CXL_TYPE3(cci->d)->cxl_dstate;
CXLEventInterruptPolicy *policy;
CXLEventLog *log;
policy = (CXLEventInterruptPolicy *)payload_out;
memset(policy, 0, sizeof(*policy));
log = &cxlds->event_logs[CXL_EVENT_TYPE_INFO];
if (log->irq_enabled) {
policy->info_settings = CXL_EVENT_INT_SETTING(log->irq_vec);
}
log = &cxlds->event_logs[CXL_EVENT_TYPE_WARN];
if (log->irq_enabled) {
policy->warn_settings = CXL_EVENT_INT_SETTING(log->irq_vec);
}
log = &cxlds->event_logs[CXL_EVENT_TYPE_FAIL];
if (log->irq_enabled) {
policy->failure_settings = CXL_EVENT_INT_SETTING(log->irq_vec);
}
log = &cxlds->event_logs[CXL_EVENT_TYPE_FATAL];
if (log->irq_enabled) {
policy->fatal_settings = CXL_EVENT_INT_SETTING(log->irq_vec);
}
log = &cxlds->event_logs[CXL_EVENT_TYPE_DYNAMIC_CAP];
if (log->irq_enabled) {
/* Dynamic Capacity borrows the same vector as info */
policy->dyn_cap_settings = CXL_INT_MSI_MSIX;
}
*len_out = sizeof(*policy);
return CXL_MBOX_SUCCESS;
}
static CXLRetCode cmd_events_set_interrupt_policy(const struct cxl_cmd *cmd,
uint8_t *payload_in,
size_t len_in,
uint8_t *payload_out,
size_t *len_out,
CXLCCI *cci)
{
CXLDeviceState *cxlds = &CXL_TYPE3(cci->d)->cxl_dstate;
CXLEventInterruptPolicy *policy;
CXLEventLog *log;
if (len_in < CXL_EVENT_INT_SETTING_MIN_LEN) {
return CXL_MBOX_INVALID_PAYLOAD_LENGTH;
}
policy = (CXLEventInterruptPolicy *)payload_in;
log = &cxlds->event_logs[CXL_EVENT_TYPE_INFO];
log->irq_enabled = (policy->info_settings & CXL_EVENT_INT_MODE_MASK) ==
CXL_INT_MSI_MSIX;
log = &cxlds->event_logs[CXL_EVENT_TYPE_WARN];
log->irq_enabled = (policy->warn_settings & CXL_EVENT_INT_MODE_MASK) ==
CXL_INT_MSI_MSIX;
log = &cxlds->event_logs[CXL_EVENT_TYPE_FAIL];
log->irq_enabled = (policy->failure_settings & CXL_EVENT_INT_MODE_MASK) ==
CXL_INT_MSI_MSIX;
log = &cxlds->event_logs[CXL_EVENT_TYPE_FATAL];
log->irq_enabled = (policy->fatal_settings & CXL_EVENT_INT_MODE_MASK) ==
CXL_INT_MSI_MSIX;
/* DCD is optional */
if (len_in < sizeof(*policy)) {
return CXL_MBOX_SUCCESS;
}
log = &cxlds->event_logs[CXL_EVENT_TYPE_DYNAMIC_CAP];
log->irq_enabled = (policy->dyn_cap_settings & CXL_EVENT_INT_MODE_MASK) ==
CXL_INT_MSI_MSIX;
*len_out = 0;
return CXL_MBOX_SUCCESS;
}
/* CXL r3.0 section 8.2.9.1.1: Identify (Opcode 0001h) */
static CXLRetCode cmd_infostat_identify(const struct cxl_cmd *cmd,
uint8_t *payload_in,
size_t len_in,
uint8_t *payload_out,
size_t *len_out,
CXLCCI *cci)
{
PCIDeviceClass *class = PCI_DEVICE_GET_CLASS(cci->d);
struct {
uint16_t pcie_vid;
uint16_t pcie_did;
uint16_t pcie_subsys_vid;
uint16_t pcie_subsys_id;
uint64_t sn;
uint8_t max_message_size;
uint8_t component_type;
} QEMU_PACKED *is_identify;
QEMU_BUILD_BUG_ON(sizeof(*is_identify) != 18);
is_identify = (void *)payload_out;
memset(is_identify, 0, sizeof(*is_identify));
is_identify->pcie_vid = class->vendor_id;
is_identify->pcie_did = class->device_id;
if (object_dynamic_cast(OBJECT(cci->d), TYPE_CXL_USP)) {
is_identify->sn = CXL_USP(cci->d)->sn;
/* Subsystem info not defined for a USP */
is_identify->pcie_subsys_vid = 0;
is_identify->pcie_subsys_id = 0;
is_identify->component_type = 0x0; /* Switch */
} else if (object_dynamic_cast(OBJECT(cci->d), TYPE_CXL_TYPE3)) {
PCIDevice *pci_dev = PCI_DEVICE(cci->d);
is_identify->sn = CXL_TYPE3(cci->d)->sn;
/*
* We can't always use class->subsystem_vendor_id as
* it is not set if the defaults are used.
*/
is_identify->pcie_subsys_vid =
pci_get_word(pci_dev->config + PCI_SUBSYSTEM_VENDOR_ID);
is_identify->pcie_subsys_id =
pci_get_word(pci_dev->config + PCI_SUBSYSTEM_ID);
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 */
*len_out = sizeof(*is_identify);
return CXL_MBOX_SUCCESS;
}
static void cxl_set_dsp_active_bm(PCIBus *b, PCIDevice *d,
void *private)
{
uint8_t *bm = private;
if (object_dynamic_cast(OBJECT(d), TYPE_CXL_DSP)) {
uint8_t port = PCIE_PORT(d)->port;
bm[port / 8] |= 1 << (port % 8);
}
}
/* CXL r3 8.2.9.1.1 */
static CXLRetCode cmd_identify_switch_device(const struct cxl_cmd *cmd,
uint8_t *payload_in,
size_t len_in,
uint8_t *payload_out,
size_t *len_out,
CXLCCI *cci)
{
PCIEPort *usp = PCIE_PORT(cci->d);
PCIBus *bus = &PCI_BRIDGE(cci->d)->sec_bus;
int num_phys_ports = pcie_count_ds_ports(bus);
struct cxl_fmapi_ident_switch_dev_resp_pl {
uint8_t ingress_port_id;
uint8_t rsvd;
uint8_t num_physical_ports;
uint8_t num_vcss;
uint8_t active_port_bitmask[0x20];
uint8_t active_vcs_bitmask[0x20];
uint16_t total_vppbs;
uint16_t bound_vppbs;
uint8_t num_hdm_decoders_per_usp;
} QEMU_PACKED *out;
QEMU_BUILD_BUG_ON(sizeof(*out) != 0x49);
out = (struct cxl_fmapi_ident_switch_dev_resp_pl *)payload_out;
*out = (struct cxl_fmapi_ident_switch_dev_resp_pl) {
.num_physical_ports = num_phys_ports + 1, /* 1 USP */
.num_vcss = 1, /* Not yet support multiple VCS - potentialy tricky */
.active_vcs_bitmask[0] = 0x1,
.total_vppbs = num_phys_ports + 1,
.bound_vppbs = num_phys_ports + 1,
.num_hdm_decoders_per_usp = 4,
};
/* Depends on the CCI type */
if (object_dynamic_cast(OBJECT(cci->intf), TYPE_PCIE_PORT)) {
out->ingress_port_id = PCIE_PORT(cci->intf)->port;
} else {
/* MCTP? */
out->ingress_port_id = 0;
}
pci_for_each_device_under_bus(bus, cxl_set_dsp_active_bm,
out->active_port_bitmask);
out->active_port_bitmask[usp->port / 8] |= (1 << usp->port % 8);
*len_out = sizeof(*out);
return CXL_MBOX_SUCCESS;
}
/* CXL r3.0 Section 7.6.7.1.2: Get Physical Port State (Opcode 5101h) */
static CXLRetCode cmd_get_physical_port_state(const struct cxl_cmd *cmd,
uint8_t *payload_in,
size_t len_in,
uint8_t *payload_out,
size_t *len_out,
CXLCCI *cci)
{
/* CXL r3.0 Table 7-18: Get Physical Port State Request Payload */
struct cxl_fmapi_get_phys_port_state_req_pl {
uint8_t num_ports;
uint8_t ports[];
} QEMU_PACKED *in;
/*
* CXL r3.0 Table 7-20: Get Physical Port State Port Information Block
* Format
*/
struct cxl_fmapi_port_state_info_block {
uint8_t port_id;
uint8_t config_state;
uint8_t connected_device_cxl_version;
uint8_t rsv1;
uint8_t connected_device_type;
uint8_t port_cxl_version_bitmask;
uint8_t max_link_width;
uint8_t negotiated_link_width;
uint8_t supported_link_speeds_vector;
uint8_t max_link_speed;
uint8_t current_link_speed;
uint8_t ltssm_state;
uint8_t first_lane_num;
uint16_t link_state;
uint8_t supported_ld_count;
} QEMU_PACKED;
/* CXL r3.0 Table 7-19: Get Physical Port State Response Payload */
struct cxl_fmapi_get_phys_port_state_resp_pl {
uint8_t num_ports;
uint8_t rsv1[3];
struct cxl_fmapi_port_state_info_block ports[];
} QEMU_PACKED *out;
PCIBus *bus = &PCI_BRIDGE(cci->d)->sec_bus;
PCIEPort *usp = PCIE_PORT(cci->d);
size_t pl_size;
int i;
in = (struct cxl_fmapi_get_phys_port_state_req_pl *)payload_in;
out = (struct cxl_fmapi_get_phys_port_state_resp_pl *)payload_out;
/* Check if what was requested can fit */
if (sizeof(*out) + sizeof(*out->ports) * in->num_ports > cci->payload_max) {
return CXL_MBOX_INVALID_INPUT;
}
/* For success there should be a match for each requested */
out->num_ports = in->num_ports;
for (i = 0; i < in->num_ports; i++) {
struct cxl_fmapi_port_state_info_block *port;
/* First try to match on downstream port */
PCIDevice *port_dev;
uint16_t lnkcap, lnkcap2, lnksta;
port = &out->ports[i];
port_dev = pcie_find_port_by_pn(bus, in->ports[i]);
if (port_dev) { /* DSP */
PCIDevice *ds_dev = pci_bridge_get_sec_bus(PCI_BRIDGE(port_dev))
->devices[0];
port->config_state = 3;
if (ds_dev) {
if (object_dynamic_cast(OBJECT(ds_dev), TYPE_CXL_TYPE3)) {
port->connected_device_type = 5; /* Assume MLD for now */
} else {
port->connected_device_type = 1;
}
} else {
port->connected_device_type = 0;
}
port->supported_ld_count = 3;
} else if (usp->port == in->ports[i]) { /* USP */
port_dev = PCI_DEVICE(usp);
port->config_state = 4;
port->connected_device_type = 0;
} else {
return CXL_MBOX_INVALID_INPUT;
}
port->port_id = in->ports[i];
/* Information on status of this port in lnksta, lnkcap */
if (!port_dev->exp.exp_cap) {
return CXL_MBOX_INTERNAL_ERROR;
}
lnksta = port_dev->config_read(port_dev,
port_dev->exp.exp_cap + PCI_EXP_LNKSTA,
sizeof(lnksta));
lnkcap = port_dev->config_read(port_dev,
port_dev->exp.exp_cap + PCI_EXP_LNKCAP,
sizeof(lnkcap));
lnkcap2 = port_dev->config_read(port_dev,
port_dev->exp.exp_cap + PCI_EXP_LNKCAP2,
sizeof(lnkcap2));
port->max_link_width = (lnkcap & PCI_EXP_LNKCAP_MLW) >> 4;
port->negotiated_link_width = (lnksta & PCI_EXP_LNKSTA_NLW) >> 4;
/* No definition for SLS field in linux/pci_regs.h */
port->supported_link_speeds_vector = (lnkcap2 & 0xFE) >> 1;
port->max_link_speed = lnkcap & PCI_EXP_LNKCAP_SLS;
port->current_link_speed = lnksta & PCI_EXP_LNKSTA_CLS;
/* TODO: Track down if we can get the rest of the info */
port->ltssm_state = 0x7;
port->first_lane_num = 0;
port->link_state = 0;
port->port_cxl_version_bitmask = 0x2;
port->connected_device_cxl_version = 0x2;
}
pl_size = sizeof(*out) + sizeof(*out->ports) * in->num_ports;
*len_out = pl_size;
return CXL_MBOX_SUCCESS;
}
/* CXL r3.0 8.2.9.1.2 */
static CXLRetCode cmd_infostat_bg_op_sts(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 status;
uint8_t rsvd;
uint16_t opcode;
uint16_t returncode;
uint16_t vendor_ext_status;
} QEMU_PACKED *bg_op_status;
QEMU_BUILD_BUG_ON(sizeof(*bg_op_status) != 8);
bg_op_status = (void *)payload_out;
memset(bg_op_status, 0, sizeof(*bg_op_status));
bg_op_status->status = cci->bg.complete_pct << 1;
if (cci->bg.runtime > 0) {
bg_op_status->status |= 1U << 0;
}
bg_op_status->opcode = cci->bg.opcode;
bg_op_status->returncode = cci->bg.ret_code;
*len_out = sizeof(*bg_op_status);
return CXL_MBOX_SUCCESS;
}
/* 8.2.9.2.1 */
static CXLRetCode cmd_firmware_update_get_info(const struct cxl_cmd *cmd,
uint8_t *payload_in,
size_t len,
uint8_t *payload_out,
size_t *len_out,
CXLCCI *cci)
{
CXLDeviceState *cxl_dstate = &CXL_TYPE3(cci->d)->cxl_dstate;
struct {
uint8_t slots_supported;
uint8_t slot_info;
uint8_t caps;
uint8_t rsvd[0xd];
char fw_rev1[0x10];
char fw_rev2[0x10];
char fw_rev3[0x10];
char fw_rev4[0x10];
} QEMU_PACKED *fw_info;
QEMU_BUILD_BUG_ON(sizeof(*fw_info) != 0x50);
if ((cxl_dstate->vmem_size < CXL_CAPACITY_MULTIPLIER) ||
(cxl_dstate->pmem_size < CXL_CAPACITY_MULTIPLIER)) {
return CXL_MBOX_INTERNAL_ERROR;
}
fw_info = (void *)payload_out;
memset(fw_info, 0, sizeof(*fw_info));
fw_info->slots_supported = 2;
fw_info->slot_info = BIT(0) | BIT(3);
fw_info->caps = 0;
pstrcpy(fw_info->fw_rev1, sizeof(fw_info->fw_rev1), "BWFW VERSION 0");
*len_out = sizeof(*fw_info);
return CXL_MBOX_SUCCESS;
}
/* 8.2.9.3.1 */
static CXLRetCode cmd_timestamp_get(const struct cxl_cmd *cmd,
uint8_t *payload_in,
size_t len_in,
uint8_t *payload_out,
size_t *len_out,
CXLCCI *cci)
{
CXLDeviceState *cxl_dstate = &CXL_TYPE3(cci->d)->cxl_dstate;
uint64_t final_time = cxl_device_get_timestamp(cxl_dstate);
stq_le_p(payload_out, final_time);
*len_out = 8;
return CXL_MBOX_SUCCESS;
}
/* 8.2.9.3.2 */
static CXLRetCode cmd_timestamp_set(const struct cxl_cmd *cmd,
uint8_t *payload_in,
size_t len_in,
uint8_t *payload_out,
size_t *len_out,
CXLCCI *cci)
{
CXLDeviceState *cxl_dstate = &CXL_TYPE3(cci->d)->cxl_dstate;
cxl_dstate->timestamp.set = true;
cxl_dstate->timestamp.last_set = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
cxl_dstate->timestamp.host_set = le64_to_cpu(*(uint64_t *)payload_in);
*len_out = 0;
return CXL_MBOX_SUCCESS;
}
/* CXL 3.0 8.2.9.5.2.1 Command Effects Log (CEL) */
static const QemuUUID cel_uuid = {
.data = UUID(0x0da9c0b5, 0xbf41, 0x4b78, 0x8f, 0x79,
0x96, 0xb1, 0x62, 0x3b, 0x3f, 0x17)
};
/* 8.2.9.4.1 */
static CXLRetCode cmd_logs_get_supported(const struct cxl_cmd *cmd,
uint8_t *payload_in,
size_t len_in,
uint8_t *payload_out,
size_t *len_out,
CXLCCI *cci)
{
struct {
uint16_t entries;
uint8_t rsvd[6];
struct {
QemuUUID uuid;
uint32_t size;
} log_entries[1];
} QEMU_PACKED *supported_logs = (void *)payload_out;
QEMU_BUILD_BUG_ON(sizeof(*supported_logs) != 0x1c);
supported_logs->entries = 1;
supported_logs->log_entries[0].uuid = cel_uuid;
supported_logs->log_entries[0].size = 4 * cci->cel_size;
*len_out = sizeof(*supported_logs);
return CXL_MBOX_SUCCESS;
}
/* 8.2.9.4.2 */
static CXLRetCode cmd_logs_get_log(const struct cxl_cmd *cmd,
uint8_t *payload_in,
size_t len_in,
uint8_t *payload_out,
size_t *len_out,
CXLCCI *cci)
{
struct {
QemuUUID uuid;
uint32_t offset;
uint32_t length;
} QEMU_PACKED QEMU_ALIGNED(16) *get_log;
get_log = (void *)payload_in;
/*
* 8.2.9.4.2
* The device shall return Invalid Parameter if the Offset or Length
* fields attempt to access beyond the size of the log as reported by Get
* Supported Logs.
*
* XXX: Spec is wrong, "Invalid Parameter" isn't a thing.
* XXX: Spec doesn't address incorrect UUID incorrectness.
*
* The CEL buffer is large enough to fit all commands in the emulation, so
* the only possible failure would be if the mailbox itself isn't big
* enough.
*/
if (get_log->offset + get_log->length > cci->payload_max) {
return CXL_MBOX_INVALID_INPUT;
}
if (!qemu_uuid_is_equal(&get_log->uuid, &cel_uuid)) {
return CXL_MBOX_UNSUPPORTED;
}
/* Store off everything to local variables so we can wipe out the payload */
*len_out = get_log->length;
memmove(payload_out, cci->cel_log + get_log->offset, get_log->length);
return CXL_MBOX_SUCCESS;
}
/* 8.2.9.5.1.1 */
static CXLRetCode cmd_identify_memory_device(const struct cxl_cmd *cmd,
uint8_t *payload_in,
size_t len_in,
uint8_t *payload_out,
size_t *len_out,
CXLCCI *cci)
{
struct {
char fw_revision[0x10];
uint64_t total_capacity;
uint64_t volatile_capacity;
uint64_t persistent_capacity;
uint64_t partition_align;
uint16_t info_event_log_size;
uint16_t warning_event_log_size;
uint16_t failure_event_log_size;
uint16_t fatal_event_log_size;
uint32_t lsa_size;
uint8_t poison_list_max_mer[3];
uint16_t inject_poison_limit;
uint8_t poison_caps;
uint8_t qos_telemetry_caps;
} QEMU_PACKED *id;
QEMU_BUILD_BUG_ON(sizeof(*id) != 0x43);
CXLType3Dev *ct3d = CXL_TYPE3(cci->d);
CXLType3Class *cvc = CXL_TYPE3_GET_CLASS(ct3d);
CXLDeviceState *cxl_dstate = &ct3d->cxl_dstate;
if ((!QEMU_IS_ALIGNED(cxl_dstate->vmem_size, CXL_CAPACITY_MULTIPLIER)) ||
(!QEMU_IS_ALIGNED(cxl_dstate->pmem_size, CXL_CAPACITY_MULTIPLIER))) {
return CXL_MBOX_INTERNAL_ERROR;
}
id = (void *)payload_out;
memset(id, 0, sizeof(*id));
snprintf(id->fw_revision, 0x10, "BWFW VERSION %02d", 0);
stq_le_p(&id->total_capacity,
cxl_dstate->mem_size / CXL_CAPACITY_MULTIPLIER);
stq_le_p(&id->persistent_capacity,
cxl_dstate->pmem_size / CXL_CAPACITY_MULTIPLIER);
stq_le_p(&id->volatile_capacity,
cxl_dstate->vmem_size / CXL_CAPACITY_MULTIPLIER);
stl_le_p(&id->lsa_size, cvc->get_lsa_size(ct3d));
/* 256 poison records */
st24_le_p(id->poison_list_max_mer, 256);
/* No limit - so limited by main poison record limit */
stw_le_p(&id->inject_poison_limit, 0);
*len_out = sizeof(*id);
return CXL_MBOX_SUCCESS;
}
static CXLRetCode cmd_ccls_get_partition_info(const struct cxl_cmd *cmd,
uint8_t *payload_in,
size_t len_in,
uint8_t *payload_out,
size_t *len_out,
CXLCCI *cci)
{
CXLDeviceState *cxl_dstate = &CXL_TYPE3(cci->d)->cxl_dstate;
struct {
uint64_t active_vmem;
uint64_t active_pmem;
uint64_t next_vmem;
uint64_t next_pmem;
} QEMU_PACKED *part_info = (void *)payload_out;
QEMU_BUILD_BUG_ON(sizeof(*part_info) != 0x20);
if ((!QEMU_IS_ALIGNED(cxl_dstate->vmem_size, CXL_CAPACITY_MULTIPLIER)) ||
(!QEMU_IS_ALIGNED(cxl_dstate->pmem_size, CXL_CAPACITY_MULTIPLIER))) {
return CXL_MBOX_INTERNAL_ERROR;
}
stq_le_p(&part_info->active_vmem,
cxl_dstate->vmem_size / CXL_CAPACITY_MULTIPLIER);
/*
* When both next_vmem and next_pmem are 0, there is no pending change to
* partitioning.
*/
stq_le_p(&part_info->next_vmem, 0);
stq_le_p(&part_info->active_pmem,
cxl_dstate->pmem_size / CXL_CAPACITY_MULTIPLIER);
stq_le_p(&part_info->next_pmem, 0);
*len_out = sizeof(*part_info);
return CXL_MBOX_SUCCESS;
}
static CXLRetCode cmd_ccls_get_lsa(const struct cxl_cmd *cmd,
uint8_t *payload_in,
size_t len_in,
uint8_t *payload_out,
size_t *len_out,
CXLCCI *cci)
{
struct {
uint32_t offset;
uint32_t length;
} QEMU_PACKED *get_lsa;
CXLType3Dev *ct3d = CXL_TYPE3(cci->d);
CXLType3Class *cvc = CXL_TYPE3_GET_CLASS(ct3d);
uint32_t offset, length;
get_lsa = (void *)payload_in;
offset = get_lsa->offset;
length = get_lsa->length;
if (offset + length > cvc->get_lsa_size(ct3d)) {
*len_out = 0;
return CXL_MBOX_INVALID_INPUT;
}
*len_out = cvc->get_lsa(ct3d, payload_out, length, offset);
return CXL_MBOX_SUCCESS;
}
static CXLRetCode cmd_ccls_set_lsa(const struct cxl_cmd *cmd,
uint8_t *payload_in,
size_t len_in,
uint8_t *payload_out,
size_t *len_out,
CXLCCI *cci)
{
struct set_lsa_pl {
uint32_t offset;
uint32_t rsvd;
uint8_t data[];
} QEMU_PACKED;
struct set_lsa_pl *set_lsa_payload = (void *)payload_in;
CXLType3Dev *ct3d = CXL_TYPE3(cci->d);
CXLType3Class *cvc = CXL_TYPE3_GET_CLASS(ct3d);
const size_t hdr_len = offsetof(struct set_lsa_pl, data);
*len_out = 0;
if (!len_in) {
return CXL_MBOX_SUCCESS;
}
if (set_lsa_payload->offset + len_in > cvc->get_lsa_size(ct3d) + hdr_len) {
return CXL_MBOX_INVALID_INPUT;
}
len_in -= hdr_len;
cvc->set_lsa(ct3d, set_lsa_payload->data, len_in, set_lsa_payload->offset);
return CXL_MBOX_SUCCESS;
}
/* Perform the actual device zeroing */
static void __do_sanitization(CXLType3Dev *ct3d)
{
MemoryRegion *mr;
if (ct3d->hostvmem) {
mr = host_memory_backend_get_memory(ct3d->hostvmem);
if (mr) {
void *hostmem = memory_region_get_ram_ptr(mr);
memset(hostmem, 0, memory_region_size(mr));
}
}
if (ct3d->hostpmem) {
mr = host_memory_backend_get_memory(ct3d->hostpmem);
if (mr) {
void *hostmem = memory_region_get_ram_ptr(mr);
memset(hostmem, 0, memory_region_size(mr));
}
}
if (ct3d->lsa) {
mr = host_memory_backend_get_memory(ct3d->lsa);
if (mr) {
void *lsa = memory_region_get_ram_ptr(mr);
memset(lsa, 0, memory_region_size(mr));
}
}
}
/*
* CXL 3.0 spec section 8.2.9.8.5.1 - Sanitize.
*
* Once the Sanitize command has started successfully, the device shall be
* placed in the media disabled state. If the command fails or is interrupted
* by a reset or power failure, it shall remain in the media disabled state
* until a successful Sanitize command has been completed. During this state:
*
* 1. Memory writes to the device will have no effect, and all memory reads
* will return random values (no user data returned, even for locations that
* the failed Sanitize operation didn’t sanitize yet).
*
* 2. Mailbox commands shall still be processed in the disabled state, except
* that commands that access Sanitized areas shall fail with the Media Disabled
* error code.
*/
static CXLRetCode cmd_sanitize_overwrite(const struct cxl_cmd *cmd,
uint8_t *payload_in,
size_t len_in,
uint8_t *payload_out,
size_t *len_out,
CXLCCI *cci)
{
CXLType3Dev *ct3d = CXL_TYPE3(cci->d);
uint64_t total_mem; /* in Mb */
int secs;
total_mem = (ct3d->cxl_dstate.vmem_size + ct3d->cxl_dstate.pmem_size) >> 20;
if (total_mem <= 512) {
secs = 4;
} else if (total_mem <= 1024) {
secs = 8;
} else if (total_mem <= 2 * 1024) {
secs = 15;
} else if (total_mem <= 4 * 1024) {
secs = 30;
} else if (total_mem <= 8 * 1024) {
secs = 60;
} else if (total_mem <= 16 * 1024) {
secs = 2 * 60;
} else if (total_mem <= 32 * 1024) {
secs = 4 * 60;
} else if (total_mem <= 64 * 1024) {
secs = 8 * 60;
} else if (total_mem <= 128 * 1024) {
secs = 15 * 60;
} else if (total_mem <= 256 * 1024) {
secs = 30 * 60;
} else if (total_mem <= 512 * 1024) {
secs = 60 * 60;
} else if (total_mem <= 1024 * 1024) {
secs = 120 * 60;
} else {
secs = 240 * 60; /* max 4 hrs */
}
/* EBUSY other bg cmds as of now */
cci->bg.runtime = secs * 1000UL;
*len_out = 0;
cxl_dev_disable_media(&ct3d->cxl_dstate);
if (secs > 2) {
/* sanitize when done */
return CXL_MBOX_BG_STARTED;
} else {
__do_sanitization(ct3d);
cxl_dev_enable_media(&ct3d->cxl_dstate);
return CXL_MBOX_SUCCESS;
}
}
static CXLRetCode cmd_get_security_state(const struct cxl_cmd *cmd,
uint8_t *payload_in,
size_t len_in,
uint8_t *payload_out,
size_t *len_out,
CXLCCI *cci)
{
uint32_t *state = (uint32_t *)payload_out;
*state = 0;
*len_out = 4;
return CXL_MBOX_SUCCESS;
}
/*
* This is very inefficient, but good enough for now!
* Also the payload will always fit, so no need to handle the MORE flag and
* make this stateful. We may want to allow longer poison lists to aid
* testing that kernel functionality.
*/
static CXLRetCode cmd_media_get_poison_list(const struct cxl_cmd *cmd,
uint8_t *payload_in,
size_t len_in,
uint8_t *payload_out,
size_t *len_out,
CXLCCI *cci)
{
struct get_poison_list_pl {
uint64_t pa;
uint64_t length;
} QEMU_PACKED;
struct get_poison_list_out_pl {
uint8_t flags;
uint8_t rsvd1;
uint64_t overflow_timestamp;
uint16_t count;
uint8_t rsvd2[0x14];
struct {
uint64_t addr;
uint32_t length;
uint32_t resv;
} QEMU_PACKED records[];
} QEMU_PACKED;
struct get_poison_list_pl *in = (void *)payload_in;
struct get_poison_list_out_pl *out = (void *)payload_out;
CXLType3Dev *ct3d = CXL_TYPE3(cci->d);
uint16_t record_count = 0, i = 0;
uint64_t query_start, query_length;
CXLPoisonList *poison_list = &ct3d->poison_list;
CXLPoison *ent;
uint16_t out_pl_len;
query_start = ldq_le_p(&in->pa);
/* 64 byte alignment required */
if (query_start & 0x3f) {
return CXL_MBOX_INVALID_INPUT;
}
query_length = ldq_le_p(&in->length) * CXL_CACHE_LINE_SIZE;
QLIST_FOREACH(ent, poison_list, node) {
/* Check for no overlap */
if (ent->start >= query_start + query_length ||
ent->start + ent->length <= query_start) {
continue;
}
record_count++;
}
out_pl_len = sizeof(*out) + record_count * sizeof(out->records[0]);
assert(out_pl_len <= CXL_MAILBOX_MAX_PAYLOAD_SIZE);
memset(out, 0, out_pl_len);
QLIST_FOREACH(ent, poison_list, node) {
uint64_t start, stop;
/* Check for no overlap */
if (ent->start >= query_start + query_length ||
ent->start + ent->length <= query_start) {
continue;
}
/* Deal with overlap */
start = MAX(ROUND_DOWN(ent->start, 64ull), query_start);
stop = MIN(ROUND_DOWN(ent->start, 64ull) + ent->length,
query_start + query_length);
stq_le_p(&out->records[i].addr, start | (ent->type & 0x7));
stl_le_p(&out->records[i].length, (stop - start) / CXL_CACHE_LINE_SIZE);
i++;
}
if (ct3d->poison_list_overflowed) {
out->flags = (1 << 1);
stq_le_p(&out->overflow_timestamp, ct3d->poison_list_overflow_ts);
}
stw_le_p(&out->count, record_count);
*len_out = out_pl_len;
return CXL_MBOX_SUCCESS;
}
static CXLRetCode cmd_media_inject_poison(const struct cxl_cmd *cmd,
uint8_t *payload_in,
size_t len_in,
uint8_t *payload_out,
size_t *len_out,
CXLCCI *cci)
{
CXLType3Dev *ct3d = CXL_TYPE3(cci->d);
CXLPoisonList *poison_list = &ct3d->poison_list;
CXLPoison *ent;
struct inject_poison_pl {
uint64_t dpa;
};
struct inject_poison_pl *in = (void *)payload_in;
uint64_t dpa = ldq_le_p(&in->dpa);
CXLPoison *p;
QLIST_FOREACH(ent, poison_list, node) {
if (dpa >= ent->start &&
dpa + CXL_CACHE_LINE_SIZE <= ent->start + ent->length) {
return CXL_MBOX_SUCCESS;
}
}
if (ct3d->poison_list_cnt == CXL_POISON_LIST_LIMIT) {
return CXL_MBOX_INJECT_POISON_LIMIT;
}
p = g_new0(CXLPoison, 1);
p->length = CXL_CACHE_LINE_SIZE;
p->start = dpa;
p->type = CXL_POISON_TYPE_INJECTED;
/*
* Possible todo: Merge with existing entry if next to it and if same type
*/
QLIST_INSERT_HEAD(poison_list, p, node);
ct3d->poison_list_cnt++;
*len_out = 0;
return CXL_MBOX_SUCCESS;
}
static CXLRetCode cmd_media_clear_poison(const struct cxl_cmd *cmd,
uint8_t *payload_in,
size_t len_in,
uint8_t *payload_out,
size_t *len_out,
CXLCCI *cci)
{
CXLType3Dev *ct3d = CXL_TYPE3(cci->d);
CXLDeviceState *cxl_dstate = &ct3d->cxl_dstate;
CXLPoisonList *poison_list = &ct3d->poison_list;
CXLType3Class *cvc = CXL_TYPE3_GET_CLASS(ct3d);
struct clear_poison_pl {
uint64_t dpa;
uint8_t data[64];
};
CXLPoison *ent;
uint64_t dpa;
struct clear_poison_pl *in = (void *)payload_in;
dpa = ldq_le_p(&in->dpa);
if (dpa + CXL_CACHE_LINE_SIZE > cxl_dstate->mem_size) {
return CXL_MBOX_INVALID_PA;
}
/* Clearing a region with no poison is not an error so always do so */
if (cvc->set_cacheline) {
if (!cvc->set_cacheline(ct3d, dpa, in->data)) {
return CXL_MBOX_INTERNAL_ERROR;
}
}
QLIST_FOREACH(ent, poison_list, node) {
/*
* Test for contained in entry. Simpler than general case
* as clearing 64 bytes and entries 64 byte aligned
*/
if ((dpa >= ent->start) && (dpa < ent->start + ent->length)) {
break;
}
}
if (!ent) {
return CXL_MBOX_SUCCESS;
}
QLIST_REMOVE(ent, node);
ct3d->poison_list_cnt--;
if (dpa > ent->start) {
CXLPoison *frag;
/* Cannot overflow as replacing existing entry */
frag = g_new0(CXLPoison, 1);
frag->start = ent->start;
frag->length = dpa - ent->start;
frag->type = ent->type;
QLIST_INSERT_HEAD(poison_list, frag, node);
ct3d->poison_list_cnt++;
}
if (dpa + CXL_CACHE_LINE_SIZE < ent->start + ent->length) {
CXLPoison *frag;
if (ct3d->poison_list_cnt == CXL_POISON_LIST_LIMIT) {
cxl_set_poison_list_overflowed(ct3d);
} else {
frag = g_new0(CXLPoison, 1);
frag->start = dpa + CXL_CACHE_LINE_SIZE;
frag->length = ent->start + ent->length - frag->start;
frag->type = ent->type;
QLIST_INSERT_HEAD(poison_list, frag, node);
ct3d->poison_list_cnt++;
}
}
/* Any fragments have been added, free original entry */
g_free(ent);
*len_out = 0;
return CXL_MBOX_SUCCESS;
}
#define IMMEDIATE_CONFIG_CHANGE (1 << 1)
#define IMMEDIATE_DATA_CHANGE (1 << 2)
#define IMMEDIATE_POLICY_CHANGE (1 << 3)
#define IMMEDIATE_LOG_CHANGE (1 << 4)
#define SECURITY_STATE_CHANGE (1 << 5)
#define BACKGROUND_OPERATION (1 << 6)
static const struct cxl_cmd cxl_cmd_set[256][256] = {
[EVENTS][GET_RECORDS] = { "EVENTS_GET_RECORDS",
cmd_events_get_records, 1, 0 },
[EVENTS][CLEAR_RECORDS] = { "EVENTS_CLEAR_RECORDS",
cmd_events_clear_records, ~0, IMMEDIATE_LOG_CHANGE },
[EVENTS][GET_INTERRUPT_POLICY] = { "EVENTS_GET_INTERRUPT_POLICY",
cmd_events_get_interrupt_policy, 0, 0 },
[EVENTS][SET_INTERRUPT_POLICY] = { "EVENTS_SET_INTERRUPT_POLICY",
cmd_events_set_interrupt_policy,
~0, IMMEDIATE_CONFIG_CHANGE },
[FIRMWARE_UPDATE][GET_INFO] = { "FIRMWARE_UPDATE_GET_INFO",
cmd_firmware_update_get_info, 0, 0 },
[TIMESTAMP][GET] = { "TIMESTAMP_GET", cmd_timestamp_get, 0, 0 },
[TIMESTAMP][SET] = { "TIMESTAMP_SET", cmd_timestamp_set,
8, IMMEDIATE_POLICY_CHANGE },
[LOGS][GET_SUPPORTED] = { "LOGS_GET_SUPPORTED", cmd_logs_get_supported,
0, 0 },
[LOGS][GET_LOG] = { "LOGS_GET_LOG", cmd_logs_get_log, 0x18, 0 },
[IDENTIFY][MEMORY_DEVICE] = { "IDENTIFY_MEMORY_DEVICE",
cmd_identify_memory_device, 0, 0 },
[CCLS][GET_PARTITION_INFO] = { "CCLS_GET_PARTITION_INFO",
cmd_ccls_get_partition_info, 0, 0 },
[CCLS][GET_LSA] = { "CCLS_GET_LSA", cmd_ccls_get_lsa, 8, 0 },
[CCLS][SET_LSA] = { "CCLS_SET_LSA", cmd_ccls_set_lsa,
~0, IMMEDIATE_CONFIG_CHANGE | IMMEDIATE_DATA_CHANGE },
[SANITIZE][OVERWRITE] = { "SANITIZE_OVERWRITE", cmd_sanitize_overwrite, 0,
IMMEDIATE_DATA_CHANGE | SECURITY_STATE_CHANGE | BACKGROUND_OPERATION },
[PERSISTENT_MEM][GET_SECURITY_STATE] = { "GET_SECURITY_STATE",
cmd_get_security_state, 0, 0 },
[MEDIA_AND_POISON][GET_POISON_LIST] = { "MEDIA_AND_POISON_GET_POISON_LIST",
cmd_media_get_poison_list, 16, 0 },
[MEDIA_AND_POISON][INJECT_POISON] = { "MEDIA_AND_POISON_INJECT_POISON",
cmd_media_inject_poison, 8, 0 },
[MEDIA_AND_POISON][CLEAR_POISON] = { "MEDIA_AND_POISON_CLEAR_POISON",
cmd_media_clear_poison, 72, 0 },
};
static const struct cxl_cmd cxl_cmd_set_sw[256][256] = {
[INFOSTAT][IS_IDENTIFY] = { "IDENTIFY", cmd_infostat_identify, 0, 0 },
[INFOSTAT][BACKGROUND_OPERATION_STATUS] = { "BACKGROUND_OPERATION_STATUS",
cmd_infostat_bg_op_sts, 0, 0 },
[TIMESTAMP][GET] = { "TIMESTAMP_GET", cmd_timestamp_get, 0, 0 },
[TIMESTAMP][SET] = { "TIMESTAMP_SET", cmd_timestamp_set, 0,
IMMEDIATE_POLICY_CHANGE },
[LOGS][GET_SUPPORTED] = { "LOGS_GET_SUPPORTED", cmd_logs_get_supported, 0,
0 },
[LOGS][GET_LOG] = { "LOGS_GET_LOG", cmd_logs_get_log, 0x18, 0 },
[PHYSICAL_SWITCH][IDENTIFY_SWITCH_DEVICE] = { "IDENTIFY_SWITCH_DEVICE",
cmd_identify_switch_device, 0, 0 },
[PHYSICAL_SWITCH][GET_PHYSICAL_PORT_STATE] = { "SWITCH_PHYSICAL_PORT_STATS",
cmd_get_physical_port_state, ~0, 0 },
[TUNNEL][MANAGEMENT_COMMAND] = { "TUNNEL_MANAGEMENT_COMMAND",
cmd_tunnel_management_cmd, ~0, 0 },
};
/*
* While the command is executing in the background, the device should
* update the percentage complete in the Background Command Status Register
* at least once per second.
*/
#define CXL_MBOX_BG_UPDATE_FREQ 1000UL
int cxl_process_cci_message(CXLCCI *cci, uint8_t set, uint8_t cmd,
size_t len_in, uint8_t *pl_in, size_t *len_out,
uint8_t *pl_out, bool *bg_started)
{
int ret;
const struct cxl_cmd *cxl_cmd;
opcode_handler h;
*len_out = 0;
cxl_cmd = &cci->cxl_cmd_set[set][cmd];
h = cxl_cmd->handler;
if (!h) {
qemu_log_mask(LOG_UNIMP, "Command %04xh not implemented\n",
set << 8 | cmd);
return CXL_MBOX_UNSUPPORTED;
}
if (len_in != cxl_cmd->in && cxl_cmd->in != ~0) {
return CXL_MBOX_INVALID_PAYLOAD_LENGTH;
}
/* Only one bg command at a time */
if ((cxl_cmd->effect & BACKGROUND_OPERATION) &&
cci->bg.runtime > 0) {
return CXL_MBOX_BUSY;
}
/* forbid any selected commands while overwriting */
if (sanitize_running(cci)) {
if (h == cmd_events_get_records ||
h == cmd_ccls_get_partition_info ||
h == cmd_ccls_set_lsa ||
h == cmd_ccls_get_lsa ||
h == cmd_logs_get_log ||
h == cmd_media_get_poison_list ||
h == cmd_media_inject_poison ||
h == cmd_media_clear_poison ||
h == cmd_sanitize_overwrite) {
return CXL_MBOX_MEDIA_DISABLED;
}
}
ret = (*h)(cxl_cmd, pl_in, len_in, pl_out, len_out, cci);
if ((cxl_cmd->effect & BACKGROUND_OPERATION) &&
ret == CXL_MBOX_BG_STARTED) {
*bg_started = true;
} else {
*bg_started = false;
}
/* Set bg and the return code */
if (*bg_started) {
uint64_t now;
cci->bg.opcode = (set << 8) | cmd;
cci->bg.complete_pct = 0;
cci->bg.ret_code = 0;
now = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL);
cci->bg.starttime = now;
timer_mod(cci->bg.timer, now + CXL_MBOX_BG_UPDATE_FREQ);
}
return ret;
}
static void bg_timercb(void *opaque)
{
CXLCCI *cci = opaque;
uint64_t now = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL);
uint64_t total_time = cci->bg.starttime + cci->bg.runtime;
assert(cci->bg.runtime > 0);
if (now >= total_time) { /* we are done */
uint16_t ret = CXL_MBOX_SUCCESS;
cci->bg.complete_pct = 100;
cci->bg.ret_code = ret;
if (ret == CXL_MBOX_SUCCESS) {
switch (cci->bg.opcode) {
case 0x4400: /* sanitize */
{
CXLType3Dev *ct3d = CXL_TYPE3(cci->d);
__do_sanitization(ct3d);
cxl_dev_enable_media(&ct3d->cxl_dstate);
}
break;
case 0x4304: /* TODO: scan media */
break;
default:
__builtin_unreachable();
break;
}
}
qemu_log("Background command %04xh finished: %s\n",
cci->bg.opcode,
ret == CXL_MBOX_SUCCESS ? "success" : "aborted");
} else {
/* estimate only */
cci->bg.complete_pct = 100 * now / total_time;
timer_mod(cci->bg.timer, now + CXL_MBOX_BG_UPDATE_FREQ);
}
if (cci->bg.complete_pct == 100) {
/* TODO: generalize to switch CCI */
CXLType3Dev *ct3d = CXL_TYPE3(cci->d);
CXLDeviceState *cxl_dstate = &ct3d->cxl_dstate;
PCIDevice *pdev = PCI_DEVICE(cci->d);
cci->bg.starttime = 0;
/* registers are updated, allow new bg-capable cmds */
cci->bg.runtime = 0;
if (msix_enabled(pdev)) {
msix_notify(pdev, cxl_dstate->mbox_msi_n);
} else if (msi_enabled(pdev)) {
msi_notify(pdev, cxl_dstate->mbox_msi_n);
}
}
}
void cxl_init_cci(CXLCCI *cci, size_t payload_max)
{
cci->payload_max = payload_max;
for (int set = 0; set < 256; set++) {
for (int cmd = 0; cmd < 256; cmd++) {
if (cci->cxl_cmd_set[set][cmd].handler) {
const struct cxl_cmd *c = &cci->cxl_cmd_set[set][cmd];
struct cel_log *log =
&cci->cel_log[cci->cel_size];
log->opcode = (set << 8) | cmd;
log->effect = c->effect;
cci->cel_size++;
}
}
}
cci->bg.complete_pct = 0;
cci->bg.starttime = 0;
cci->bg.runtime = 0;
cci->bg.timer = timer_new_ms(QEMU_CLOCK_VIRTUAL,
bg_timercb, cci);
}
void cxl_initialize_mailbox_swcci(CXLCCI *cci, DeviceState *intf,
DeviceState *d, size_t payload_max)
{
cci->cxl_cmd_set = cxl_cmd_set_sw;
cci->d = d;
cci->intf = intf;
cxl_init_cci(cci, payload_max);
}
void cxl_initialize_mailbox_t3(CXLCCI *cci, DeviceState *d, size_t payload_max)
{
cci->cxl_cmd_set = cxl_cmd_set;
cci->d = d;
/* No separation for PCI MB as protocol handled in PCI device */
cci->intf = d;
cxl_init_cci(cci, payload_max);
}
static const struct cxl_cmd cxl_cmd_set_t3_ld[256][256] = {
[INFOSTAT][IS_IDENTIFY] = { "IDENTIFY", cmd_infostat_identify, 0, 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 },
};
void cxl_initialize_t3_ld_cci(CXLCCI *cci, DeviceState *d, DeviceState *intf,
size_t payload_max)
{
cci->cxl_cmd_set = cxl_cmd_set_t3_ld;
cci->d = d;
cci->intf = intf;
cxl_init_cci(cci, payload_max);
}
static const struct cxl_cmd cxl_cmd_set_t3_fm_owned_ld_mctp[256][256] = {
[INFOSTAT][IS_IDENTIFY] = { "IDENTIFY", cmd_infostat_identify, 0, 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 },
[TIMESTAMP][GET] = { "TIMESTAMP_GET", cmd_timestamp_get, 0, 0 },
[TUNNEL][MANAGEMENT_COMMAND] = { "TUNNEL_MANAGEMENT_COMMAND",
cmd_tunnel_management_cmd, ~0, 0 },
};
void cxl_initialize_t3_fm_owned_ld_mctpcci(CXLCCI *cci, DeviceState *d,
DeviceState *intf,
size_t payload_max)
{
cci->cxl_cmd_set = cxl_cmd_set_t3_fm_owned_ld_mctp;
cci->d = d;
cci->intf = intf;
cxl_init_cci(cci, payload_max);
}
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