diff options
| author | Ben Widawsky <ben.widawsky@intel.com> | 2022-04-29 15:40:31 +0100 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2022-05-13 06:13:36 -0400 |
| commit | 464e14ac438e21c532889d78caf54a1dc837012a (patch) | |
| tree | 50bf6a90ef8f69d988dd4092602e3ed6460fc32f /include/hw | |
| parent | 6364adacdfa6a24e3f5b08f6b5ffa789a5d828a7 (diff) | |
hw/cxl/device: Implement basic mailbox (8.2.8.4)
This is the beginning of implementing mailbox support for CXL 2.0
devices. The implementation recognizes when the doorbell is rung,
handles the command/payload, clears the doorbell while returning error
codes and data.
Generally the mailbox mechanism is designed to permit communication
between the host OS and the firmware running on the device. For our
purposes, we emulate both the firmware, implemented primarily in
cxl-mailbox-utils.c, and the hardware.
No commands are implemented yet.
Signed-off-by: Ben Widawsky <ben.widawsky@intel.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20220429144110.25167-7-Jonathan.Cameron@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'include/hw')
| -rw-r--r-- | include/hw/cxl/cxl.h | 3 | ||||
| -rw-r--r-- | include/hw/cxl/cxl_device.h | 19 |
2 files changed, 21 insertions, 1 deletions
diff --git a/include/hw/cxl/cxl.h b/include/hw/cxl/cxl.h index b9d1ac3fad..554ad93b6b 100644 --- a/include/hw/cxl/cxl.h +++ b/include/hw/cxl/cxl.h @@ -14,4 +14,7 @@ #include "cxl_component.h" #include "cxl_device.h" +#define CXL_COMPONENT_REG_BAR_IDX 0 +#define CXL_DEVICE_REG_BAR_IDX 2 + #endif diff --git a/include/hw/cxl/cxl_device.h b/include/hw/cxl/cxl_device.h index 599c887616..35489f635a 100644 --- a/include/hw/cxl/cxl_device.h +++ b/include/hw/cxl/cxl_device.h @@ -90,7 +90,21 @@ typedef struct cxl_device_state { }; /* mmio for the mailbox registers 8.2.8.4 */ - MemoryRegion mailbox; + struct { + MemoryRegion mailbox; + uint16_t payload_size; + union { + uint8_t mbox_reg_state[CXL_MAILBOX_REGISTERS_LENGTH]; + uint16_t mbox_reg_state16[CXL_MAILBOX_REGISTERS_LENGTH / 2]; + uint32_t mbox_reg_state32[CXL_MAILBOX_REGISTERS_LENGTH / 4]; + uint64_t mbox_reg_state64[CXL_MAILBOX_REGISTERS_LENGTH / 8]; + }; + struct cel_log { + uint16_t opcode; + uint16_t effect; + } cel_log[1 << 16]; + size_t cel_size; + }; /* memory region for persistent memory, HDM */ uint64_t pmem_size; @@ -140,6 +154,9 @@ CXL_DEVICE_CAPABILITY_HEADER_REGISTER(DEVICE_STATUS, CXL_DEVICE_CAP_HDR1_OFFSET) CXL_DEVICE_CAPABILITY_HEADER_REGISTER(MAILBOX, CXL_DEVICE_CAP_HDR1_OFFSET + \ CXL_DEVICE_CAP_REG_SIZE) +int cxl_initialize_mailbox(CXLDeviceState *cxl_dstate); +void cxl_process_mailbox(CXLDeviceState *cxl_dstate); + #define cxl_device_cap_init(dstate, reg, cap_id) \ do { \ uint32_t *cap_hdrs = dstate->caps_reg_state32; \ |