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hw/cxl: Support firmware updates

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Implement transfer and activate functionality per 3.1 spec for
supporting update metadata (no actual buffers). Transfer times
are arbitrarily set to ten and two seconds for full and part
transfers, respectively.

cxl update-firmware mem0 -F fw.img

<on-going fw update>

cxl update-firmware mem0
  "memdev":"mem0",
  "pmem_size":"1024.00 MiB (1073.74 MB)",
  "serial":"0",
  "host":"0000:0d:00.0",
  "firmware":{
    "num_slots":2,
    "active_slot":1,
    "online_activate_capable":true,
    "slot_1_version":"BWFW VERSION 0",
    "fw_update_in_progress":true,
    "remaining_size":22400
  }
}

<completed fw update>

cxl update-firmware mem0
{
  "memdev":"mem0",
  "pmem_size":"1024.00 MiB (1073.74 MB)",
  "serial":"0",
  "host":"0000:0d:00.0",
  "firmware":{
    "num_slots":2,
    "active_slot":1,
    "staged_slot":2,
    "online_activate_capable":true,
    "slot_1_version":"BWFW VERSION 0",
    "slot_2_version":"BWFW VERSION 1",
    "fw_update_in_progress":false
  }
}

Signed-off-by: Davidlohr Bueso <dave@stgolabs.net>
Link: https://lore.kernel.org/r/20240627164912.25630-1-dave@stgolabs.net
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Message-Id: <20240705125915.991672-2-Jonathan.Cameron@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Davidlohr Bueso 2024-07-05 13:59:15 +01:00 • committed by Michael S. Tsirkin
parent 2d41ce38fb
commit 3c1e1e5e24
2 changed files with 215 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

15
include/hw/cxl/cxl_device.h
View file

@ -181,6 +181,21 @@ typedef struct CXLCCI {
uint64_t runtime;
QEMUTimer *timer;
} bg;
/* firmware update */
struct {
uint8_t active_slot;
uint8_t staged_slot;
bool slot[4];
uint8_t curr_action;
uint8_t curr_slot;
/* handle partial transfers */
bool transferring;
size_t prev_offset;
size_t prev_len;
time_t last_partxfer;
} fw;
size_t payload_max;
/* Pointer to device hosting the CCI */
DeviceState *d;