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hw/cxl/cxl-mailbox-utils: Add dynamic capacity region representative and mailbox command support

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Per cxl spec r3.1, add dynamic capacity (DC) region representative based on
Table 8-165 and extend the cxl type3 device definition to include DC region
information. Also, based on info in 8.2.9.9.9.1, add 'Get Dynamic Capacity
Configuration' mailbox support.

Note: we store region decode length as byte-wise length on the device, which
should be divided by 256 * MiB before being returned to the host
for "Get Dynamic Capacity Configuration" mailbox command per
specification.

Reviewed-by: Gregory Price <gregory.price@memverge.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Fan Ni <fan.ni@samsung.com>
Message-Id: <20240523174651.1089554-5-nifan.cxl@gmail.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Fan Ni 2024-05-23 10:44:44 -07:00 • committed by Michael S. Tsirkin
parent 7a21e5dedb
commit 0f0f140b10
2 changed files with 112 additions and 0 deletions
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16
include/hw/cxl/cxl_device.h
View file

@ -422,6 +422,17 @@ typedef struct CXLPoison {
typedef QLIST_HEAD(, CXLPoison) CXLPoisonList;
#define CXL_POISON_LIST_LIMIT 256
#define DCD_MAX_NUM_REGION 8
typedef struct CXLDCRegion {
uint64_t base; /* aligned to 256*MiB */
uint64_t decode_len; /* aligned to 256*MiB */
uint64_t len;
uint64_t block_size;
uint32_t dsmadhandle;
uint8_t flags;
} CXLDCRegion;
struct CXLType3Dev {
/* Private */
PCIDevice parent_obj;
@ -454,6 +465,11 @@ struct CXLType3Dev {
unsigned int poison_list_cnt;
bool poison_list_overflowed;
uint64_t poison_list_overflow_ts;
struct dynamic_capacity {
uint8_t num_regions; /* 0-8 regions */
CXLDCRegion regions[DCD_MAX_NUM_REGION];
} dc;
};
#define TYPE_CXL_TYPE3 "cxl-type3"