On Wed, Oct 30, 2024 at 04:54:47PM -0500, ira.we...@intel.com wrote:
> From: Navneet Singh <navneet.si...@intel.com>
>
> CXL Dynamic Capacity Devices (DCDs) optionally support dynamic capacity
> with up to eight partitions (Regions) (dc0-dc7). CXL regions can now be
> spare and defined as dynamic capacity (dc).
>
> Add support for DCD devices. Query for DCD capabilities. Add the
> ability to add DC partitions to a CXL DC region.
>
> Signed-off-by: Navneet Singh <navneet.si...@intel.com>
> Co-authored-by: Sushant1 Kumar <sushant1.ku...@intel.com>
> Signed-off-by: Sushant1 Kumar <sushant1.ku...@intel.com>
> Co-authored-by: Ira Weiny <ira.we...@intel.com>
> Signed-off-by: Ira Weiny <ira.we...@intel.com>
>
> ---
> Changes:
> [iweiny: adjust to new sysfs interface.]
> [iweiny: Rebase to latest pending]
> [iweiny: Adjust DCD region code to new upstream sysfs entries]
> [iweiny: Ensure backwards compatibility for non-DC kernels]
> [iweiny: fixup help message to show DC type]
> [iweiny: don't double declare decoder mode is dc]
> [iweiny: simplify __reserve_dpa() with decoder mode to index]
> [iweiny: Adjust to the new region mode]
> ---
> cxl/json.c | 26 +++++++++++++++
> cxl/lib/libcxl.c | 95
> +++++++++++++++++++++++++++++++++++++++++++++++++++++-
> cxl/lib/libcxl.sym | 3 ++
> cxl/lib/private.h | 6 +++-
> cxl/libcxl.h | 55 +++++++++++++++++++++++++++++--
> cxl/memdev.c | 7 +++-
> cxl/region.c | 49 ++++++++++++++++++++++++++--
> 7 files changed, 234 insertions(+), 7 deletions(-)
>
> diff --git a/cxl/json.c b/cxl/json.c
> index
> dcd3cc28393faf7e8adf299a857531ecdeaac50a..4276b9678d7e03eaf2aec581a08450f2a0b857f2
> 100644
> --- a/cxl/json.c
> +++ b/cxl/json.c
> @@ -754,10 +754,12 @@ err_free:
> return jpoison;
> }
>
> +#define DC_SIZE_NAME_LEN 64
> struct json_object *util_cxl_memdev_to_json(struct cxl_memdev *memdev,
> unsigned long flags)
> {
> const char *devname = cxl_memdev_get_devname(memdev);
> + char size_name[DC_SIZE_NAME_LEN];
> struct json_object *jdev, *jobj;
> unsigned long long serial, size;
> const char *fw_version;
> @@ -800,6 +802,17 @@ struct json_object *util_cxl_memdev_to_json(struct
> cxl_memdev *memdev,
> }
> }
>
> + for (int index; index < MAX_NUM_DC_REGIONS; index++) {
index is not initialized.
Should be index = 0;
Also, the "cxl list" looks like below, the size of each DC region is
attached to each DCD device, that seems not quite aligned with what
"_size" means for pmem/ram. Should we have a separate option for "cxl
list" to show DC region info??
Fan
----------
{
"memdev":"mem1",
"dc0_size":"2.00 GiB (2.15 GB)",
"dc1_size":"2.00 GiB (2.15 GB)",
"serial":"0xf02",
"host":"0000:11:00.0",
"firmware_version":"BWFW VERSION 00"
},
{
"memdev":"mem3",
"dc0_size":"2.00 GiB (2.15 GB)",
"dc1_size":"2.00 GiB (2.15 GB)",
"serial":"0xf03",
"host":"0000:12:00.0",
"firmware_version":"BWFW VERSION 00"
},
----------
> + size = cxl_memdev_get_dc_size(memdev, index);
> + if (size) {
> + jobj = util_json_object_size(size, flags);
> + if (jobj) {
> + sprintf(size_name, "dc%d_size", index);
> + json_object_object_add(jdev,
> + size_name, jobj);
> + }
> + }
> + }
> if (flags & UTIL_JSON_HEALTH) {
> jobj = util_cxl_memdev_health_to_json(memdev, flags);
> if (jobj)
> @@ -948,11 +961,13 @@ struct json_object *util_cxl_bus_to_json(struct cxl_bus
> *bus,
> return jbus;
> }
>
> +#define DC_CAPABILITY_NAME_LEN 16
> struct json_object *util_cxl_decoder_to_json(struct cxl_decoder *decoder,
> unsigned long flags)
> {
> const char *devname = cxl_decoder_get_devname(decoder);
> struct cxl_port *port = cxl_decoder_get_port(decoder);
> + char dc_capable_name[DC_CAPABILITY_NAME_LEN];
> struct json_object *jdecoder, *jobj;
> struct cxl_region *region;
> u64 val, size;
> @@ -1059,6 +1074,17 @@ struct json_object *util_cxl_decoder_to_json(struct
> cxl_decoder *decoder,
> json_object_object_add(
> jdecoder, "volatile_capable", jobj);
> }
> + for (int index = 0; index < MAX_NUM_DC_REGIONS; index++) {
> + if (cxl_decoder_is_dc_capable(decoder, index)) {
> + jobj = json_object_new_boolean(true);
> + if (jobj) {
> + sprintf(dc_capable_name,
> "dc%d_capable", index);
> + json_object_object_add(jdecoder,
> + dc_capable_name,
> + jobj);
> + }
> + }
> + }
> }
>
> if (cxl_port_is_root(port) &&
> diff --git a/cxl/lib/libcxl.c b/cxl/lib/libcxl.c
> index
> 5cbfb3e7d466b491ef87ea285f7e50d3bac230db..4caa2d02313bf71960971c4eaa67fa42cea08d55
> 100644
> --- a/cxl/lib/libcxl.c
> +++ b/cxl/lib/libcxl.c
> @@ -1267,7 +1267,6 @@ static void *add_cxl_memdev(void *parent, int id, const
> char *cxlmem_base)
> char buf[SYSFS_ATTR_SIZE];
> struct stat st;
> char *host;
> -
> if (!path)
> return NULL;
> dbg(ctx, "%s: base: \'%s\'\n", devname, cxlmem_base);
> @@ -1304,6 +1303,19 @@ static void *add_cxl_memdev(void *parent, int id,
> const char *cxlmem_base)
> else
> memdev->ram_qos_class = atoi(buf);
>
> + memdev->dc_partition_count = 0;
> + for (int partition = 0; partition < MAX_NUM_DC_REGIONS; partition++) {
> + sprintf(path, "%s/dc%d/size", cxlmem_base, partition);
> + if (sysfs_read_attr(ctx, path, buf) < 0)
> + continue;
> + memdev->dc_size[partition] = strtoull(buf, NULL, 0);
> + memdev->dc_partition_count++;
> + sprintf(path, "%s/dc%d/qos_class", cxlmem_base, partition);
> + if (sysfs_read_attr(ctx, path, buf) < 0)
> + continue;
> + memdev->dc_qos_class[partition] = strtoull(buf, NULL, 0);
> + }
> +
> sprintf(path, "%s/payload_max", cxlmem_base);
> if (sysfs_read_attr(ctx, path, buf) == 0) {
> memdev->payload_max = strtoull(buf, NULL, 0);
> @@ -1540,6 +1552,14 @@ CXL_EXPORT int cxl_memdev_get_ram_qos_class(struct
> cxl_memdev *memdev)
> return memdev->ram_qos_class;
> }
>
> +CXL_EXPORT unsigned long long cxl_memdev_get_dc_size(struct cxl_memdev
> *memdev, int index)
> +{
> + if (index >= 0 && index < MAX_NUM_DC_REGIONS)
> + return memdev->dc_size[index];
> +
> + return 0;
> +}
> +
> CXL_EXPORT const char *cxl_memdev_get_firmware_verison(struct cxl_memdev
> *memdev)
> {
> return memdev->firmware_version;
> @@ -2275,6 +2295,22 @@ static void *add_cxl_decoder(void *parent, int id,
> const char *cxldecoder_base)
> decoder->mode = CXL_DECODER_MODE_RAM;
> else if (strcmp(buf, "pmem") == 0)
> decoder->mode = CXL_DECODER_MODE_PMEM;
> + else if (strcmp(buf, "dc0") == 0)
> + decoder->mode = CXL_DECODER_MODE_DC0;
> + else if (strcmp(buf, "dc1") == 0)
> + decoder->mode = CXL_DECODER_MODE_DC1;
> + else if (strcmp(buf, "dc2") == 0)
> + decoder->mode = CXL_DECODER_MODE_DC2;
> + else if (strcmp(buf, "dc3") == 0)
> + decoder->mode = CXL_DECODER_MODE_DC3;
> + else if (strcmp(buf, "dc4") == 0)
> + decoder->mode = CXL_DECODER_MODE_DC4;
> + else if (strcmp(buf, "dc5") == 0)
> + decoder->mode = CXL_DECODER_MODE_DC5;
> + else if (strcmp(buf, "dc6") == 0)
> + decoder->mode = CXL_DECODER_MODE_DC6;
> + else if (strcmp(buf, "dc7") == 0)
> + decoder->mode = CXL_DECODER_MODE_DC7;
> else if (strcmp(buf, "mixed") == 0)
> decoder->mode = CXL_DECODER_MODE_MIXED;
> else if (strcmp(buf, "none") == 0)
> @@ -2318,6 +2354,14 @@ static void *add_cxl_decoder(void *parent, int id,
> const char *cxldecoder_base)
> case CXL_PORT_SWITCH:
> decoder->pmem_capable = true;
> decoder->volatile_capable = true;
> + decoder->dc_capable[0] = true;
> + decoder->dc_capable[1] = true;
> + decoder->dc_capable[2] = true;
> + decoder->dc_capable[3] = true;
> + decoder->dc_capable[4] = true;
> + decoder->dc_capable[5] = true;
> + decoder->dc_capable[6] = true;
> + decoder->dc_capable[7] = true;
> decoder->mem_capable = true;
> decoder->accelmem_capable = true;
> sprintf(path, "%s/locked", cxldecoder_base);
> @@ -2341,6 +2385,14 @@ static void *add_cxl_decoder(void *parent, int id,
> const char *cxldecoder_base)
> { "cap_type2", &decoder->accelmem_capable },
> { "cap_type3", &decoder->mem_capable },
> { "cap_ram", &decoder->volatile_capable },
> + { "cap_ram", &decoder->dc_capable[0] },
> + { "cap_ram", &decoder->dc_capable[1] },
> + { "cap_ram", &decoder->dc_capable[2] },
> + { "cap_ram", &decoder->dc_capable[3] },
> + { "cap_ram", &decoder->dc_capable[4] },
> + { "cap_ram", &decoder->dc_capable[5] },
> + { "cap_ram", &decoder->dc_capable[6] },
> + { "cap_ram", &decoder->dc_capable[7] },
> { "cap_pmem", &decoder->pmem_capable },
> { "locked", &decoder->locked },
> };
> @@ -2592,6 +2644,30 @@ CXL_EXPORT int cxl_decoder_set_mode(struct cxl_decoder
> *decoder,
> case CXL_DECODER_MODE_RAM:
> sprintf(buf, "ram");
> break;
> + case CXL_DECODER_MODE_DC0:
> + sprintf(buf, "dc0");
> + break;
> + case CXL_DECODER_MODE_DC1:
> + sprintf(buf, "dc1");
> + break;
> + case CXL_DECODER_MODE_DC2:
> + sprintf(buf, "dc2");
> + break;
> + case CXL_DECODER_MODE_DC3:
> + sprintf(buf, "dc3");
> + break;
> + case CXL_DECODER_MODE_DC4:
> + sprintf(buf, "dc4");
> + break;
> + case CXL_DECODER_MODE_DC5:
> + sprintf(buf, "dc5");
> + break;
> + case CXL_DECODER_MODE_DC6:
> + sprintf(buf, "dc6");
> + break;
> + case CXL_DECODER_MODE_DC7:
> + sprintf(buf, "dc7");
> + break;
> default:
> err(ctx, "%s: unsupported mode: %d\n",
> cxl_decoder_get_devname(decoder), mode);
> @@ -2648,6 +2724,14 @@ CXL_EXPORT bool cxl_decoder_is_mem_capable(struct
> cxl_decoder *decoder)
> return decoder->mem_capable;
> }
>
> +CXL_EXPORT bool cxl_decoder_is_dc_capable(struct cxl_decoder *decoder, int
> index)
> +{
> + if (index >= 0 && index < MAX_NUM_DC_REGIONS)
> + return decoder->dc_capable[index];
> +
> + return 0;
> +}
> +
> CXL_EXPORT bool cxl_decoder_is_accelmem_capable(struct cxl_decoder *decoder)
> {
> return decoder->accelmem_capable;
> @@ -2717,6 +2801,8 @@ static struct cxl_region
> *cxl_decoder_create_region(struct cxl_decoder *decoder,
> sprintf(path, "%s/create_pmem_region", decoder->dev_path);
> else if (mode == CXL_DECODER_MODE_RAM)
> sprintf(path, "%s/create_ram_region", decoder->dev_path);
> + else if (cxl_decoder_mode_is_dc(mode))
> + sprintf(path, "%s/create_dc_region", decoder->dev_path);
>
> rc = sysfs_read_attr(ctx, path, buf);
> if (rc < 0) {
> @@ -2768,6 +2854,13 @@ cxl_decoder_create_ram_region(struct cxl_decoder
> *decoder)
> return cxl_decoder_create_region(decoder, CXL_DECODER_MODE_RAM);
> }
>
> +CXL_EXPORT struct cxl_region *
> +cxl_decoder_create_dc_region(struct cxl_decoder *decoder,
> + enum cxl_decoder_mode mode)
> +{
> + return cxl_decoder_create_region(decoder, mode);
> +}
> +
> CXL_EXPORT int cxl_decoder_get_nr_targets(struct cxl_decoder *decoder)
> {
> return decoder->nr_targets;
> diff --git a/cxl/lib/libcxl.sym b/cxl/lib/libcxl.sym
> index
> b5d9bdcc38e09812f26afc1cb0e804f86784b8e6..351da7512e05080d847fd87740488d613462dbc9
> 100644
> --- a/cxl/lib/libcxl.sym
> +++ b/cxl/lib/libcxl.sym
> @@ -19,6 +19,7 @@ global:
> cxl_memdev_get_ctx;
> cxl_memdev_get_pmem_size;
> cxl_memdev_get_ram_size;
> + cxl_memdev_get_dc_size;
> cxl_memdev_get_firmware_verison;
> cxl_cmd_get_devname;
> cxl_cmd_new_raw;
> @@ -247,6 +248,8 @@ LIBCXL_5 {
> global:
> cxl_region_get_mode;
> cxl_decoder_create_ram_region;
> + cxl_decoder_is_dc_capable;
> + cxl_decoder_create_dc_region;
> cxl_region_get_daxctl_region;
> cxl_port_get_parent_dport;
> } LIBCXL_4;
> diff --git a/cxl/lib/private.h b/cxl/lib/private.h
> index
> 0f45be89b6a00477d13fb6d7f1906213a3073c48..10abfa63dfc759b1589f9f039da1b920f8eb605e
> 100644
> --- a/cxl/lib/private.h
> +++ b/cxl/lib/private.h
> @@ -12,7 +12,6 @@
> #include <util/bitmap.h>
>
> #define CXL_EXPORT __attribute__ ((visibility("default")))
> -
> struct cxl_pmem {
> int id;
> void *dev_buf;
> @@ -47,6 +46,9 @@ struct cxl_memdev {
> struct list_node list;
> unsigned long long pmem_size;
> unsigned long long ram_size;
> + unsigned long long dc_size[MAX_NUM_DC_REGIONS];
> + unsigned long long dc_qos_class[MAX_NUM_DC_REGIONS];
> + int dc_partition_count;
> int ram_qos_class;
> int pmem_qos_class;
> int payload_max;
> @@ -111,6 +113,7 @@ struct cxl_endpoint {
> struct cxl_memdev *memdev;
> };
>
> +
> struct cxl_target {
> struct list_node list;
> struct cxl_decoder *decoder;
> @@ -140,6 +143,7 @@ struct cxl_decoder {
> bool pmem_capable;
> bool volatile_capable;
> bool mem_capable;
> + bool dc_capable[MAX_NUM_DC_REGIONS];
> bool accelmem_capable;
> bool locked;
> enum cxl_decoder_target_type target_type;
> diff --git a/cxl/libcxl.h b/cxl/libcxl.h
> index
> 06b87a0924faafec6c80eca83ea7551d4e117256..17ed682548b970d57f016942badc76dce61bdeaf
> 100644
> --- a/cxl/libcxl.h
> +++ b/cxl/libcxl.h
> @@ -72,6 +72,7 @@ int cxl_memdev_get_minor(struct cxl_memdev *memdev);
> struct cxl_ctx *cxl_memdev_get_ctx(struct cxl_memdev *memdev);
> unsigned long long cxl_memdev_get_pmem_size(struct cxl_memdev *memdev);
> unsigned long long cxl_memdev_get_ram_size(struct cxl_memdev *memdev);
> +unsigned long long cxl_memdev_get_dc_size(struct cxl_memdev *memdev, int
> index);
> int cxl_memdev_get_pmem_qos_class(struct cxl_memdev *memdev);
> int cxl_memdev_get_ram_qos_class(struct cxl_memdev *memdev);
> const char *cxl_memdev_get_firmware_verison(struct cxl_memdev *memdev);
> @@ -191,11 +192,20 @@ unsigned long long
> cxl_decoder_get_max_available_extent(struct cxl_decoder *decoder);
> int cxl_root_decoder_get_qos_class(struct cxl_decoder *decoder);
>
> +#define MAX_NUM_DC_REGIONS 8
> enum cxl_decoder_mode {
> CXL_DECODER_MODE_NONE,
> CXL_DECODER_MODE_MIXED,
> CXL_DECODER_MODE_PMEM,
> CXL_DECODER_MODE_RAM,
> + CXL_DECODER_MODE_DC0,
> + CXL_DECODER_MODE_DC1,
> + CXL_DECODER_MODE_DC2,
> + CXL_DECODER_MODE_DC3,
> + CXL_DECODER_MODE_DC4,
> + CXL_DECODER_MODE_DC5,
> + CXL_DECODER_MODE_DC6,
> + CXL_DECODER_MODE_DC7,
> };
>
> static inline const char *cxl_decoder_mode_name(enum cxl_decoder_mode mode)
> @@ -205,9 +215,17 @@ static inline const char *cxl_decoder_mode_name(enum
> cxl_decoder_mode mode)
> [CXL_DECODER_MODE_MIXED] = "mixed",
> [CXL_DECODER_MODE_PMEM] = "pmem",
> [CXL_DECODER_MODE_RAM] = "ram",
> + [CXL_DECODER_MODE_DC0] = "dc0",
> + [CXL_DECODER_MODE_DC1] = "dc1",
> + [CXL_DECODER_MODE_DC2] = "dc2",
> + [CXL_DECODER_MODE_DC3] = "dc3",
> + [CXL_DECODER_MODE_DC4] = "dc4",
> + [CXL_DECODER_MODE_DC5] = "dc5",
> + [CXL_DECODER_MODE_DC6] = "dc6",
> + [CXL_DECODER_MODE_DC7] = "dc7",
> };
>
> - if (mode < CXL_DECODER_MODE_NONE || mode > CXL_DECODER_MODE_RAM)
> + if (mode < CXL_DECODER_MODE_NONE || mode > CXL_DECODER_MODE_DC7)
> mode = CXL_DECODER_MODE_NONE;
> return names[mode];
> }
> @@ -221,9 +239,35 @@ cxl_decoder_mode_from_ident(const char *ident)
> return CXL_DECODER_MODE_RAM;
> else if (strcmp(ident, "pmem") == 0)
> return CXL_DECODER_MODE_PMEM;
> + else if (strcmp(ident, "dc0") == 0)
> + return CXL_DECODER_MODE_DC0;
> + else if (strcmp(ident, "dc1") == 0)
> + return CXL_DECODER_MODE_DC1;
> + else if (strcmp(ident, "dc2") == 0)
> + return CXL_DECODER_MODE_DC2;
> + else if (strcmp(ident, "dc3") == 0)
> + return CXL_DECODER_MODE_DC3;
> + else if (strcmp(ident, "dc4") == 0)
> + return CXL_DECODER_MODE_DC4;
> + else if (strcmp(ident, "dc5") == 0)
> + return CXL_DECODER_MODE_DC5;
> + else if (strcmp(ident, "dc6") == 0)
> + return CXL_DECODER_MODE_DC6;
> + else if (strcmp(ident, "dc7") == 0)
> + return CXL_DECODER_MODE_DC7;
> return CXL_DECODER_MODE_NONE;
> }
>
> +static inline bool cxl_decoder_mode_is_dc(enum cxl_decoder_mode mode)
> +{
> + return (mode >= CXL_DECODER_MODE_DC0 && mode <= CXL_DECODER_MODE_DC7);
> +}
> +
> +static inline int cxl_decoder_dc_mode_to_index(enum cxl_decoder_mode mode)
> +{
> + return mode - CXL_DECODER_MODE_DC0;
> +}
> +
> enum cxl_decoder_mode cxl_decoder_get_mode(struct cxl_decoder *decoder);
> int cxl_decoder_set_mode(struct cxl_decoder *decoder,
> enum cxl_decoder_mode mode);
> @@ -248,6 +292,7 @@ enum cxl_decoder_target_type {
> enum cxl_decoder_target_type
> cxl_decoder_get_target_type(struct cxl_decoder *decoder);
> bool cxl_decoder_is_pmem_capable(struct cxl_decoder *decoder);
> +bool cxl_decoder_is_dc_capable(struct cxl_decoder *decoder, int index);
> bool cxl_decoder_is_volatile_capable(struct cxl_decoder *decoder);
> bool cxl_decoder_is_mem_capable(struct cxl_decoder *decoder);
> bool cxl_decoder_is_accelmem_capable(struct cxl_decoder *decoder);
> @@ -258,6 +303,8 @@ unsigned int cxl_decoder_get_interleave_ways(struct
> cxl_decoder *decoder);
> struct cxl_region *cxl_decoder_get_region(struct cxl_decoder *decoder);
> struct cxl_region *cxl_decoder_create_pmem_region(struct cxl_decoder
> *decoder);
> struct cxl_region *cxl_decoder_create_ram_region(struct cxl_decoder
> *decoder);
> +struct cxl_region *cxl_decoder_create_dc_region(struct cxl_decoder *decoder,
> + enum cxl_decoder_mode mode);
> struct cxl_decoder *cxl_decoder_get_by_name(struct cxl_ctx *ctx,
> const char *ident);
> struct cxl_memdev *cxl_decoder_get_memdev(struct cxl_decoder *decoder);
> @@ -308,6 +355,7 @@ enum cxl_region_mode {
> CXL_REGION_MODE_MIXED = CXL_DECODER_MODE_MIXED,
> CXL_REGION_MODE_PMEM = CXL_DECODER_MODE_PMEM,
> CXL_REGION_MODE_RAM = CXL_DECODER_MODE_RAM,
> + CXL_REGION_MODE_DC,
> };
>
> static inline const char *cxl_region_mode_name(enum cxl_region_mode mode)
> @@ -317,9 +365,10 @@ static inline const char *cxl_region_mode_name(enum
> cxl_region_mode mode)
> [CXL_REGION_MODE_MIXED] = "mixed",
> [CXL_REGION_MODE_PMEM] = "pmem",
> [CXL_REGION_MODE_RAM] = "ram",
> + [CXL_REGION_MODE_DC] = "dc",
> };
>
> - if (mode < CXL_REGION_MODE_NONE || mode > CXL_REGION_MODE_RAM)
> + if (mode < CXL_REGION_MODE_NONE || mode > CXL_REGION_MODE_DC)
> mode = CXL_REGION_MODE_NONE;
> return names[mode];
> }
> @@ -333,6 +382,8 @@ cxl_region_mode_from_ident(const char *ident)
> return CXL_REGION_MODE_RAM;
> else if (strcmp(ident, "pmem") == 0)
> return CXL_REGION_MODE_PMEM;
> + else if (strcmp(ident, "dc") == 0)
> + return CXL_REGION_MODE_DC;
> return CXL_REGION_MODE_NONE;
> }
>
> diff --git a/cxl/memdev.c b/cxl/memdev.c
> index
> 6e44d1578d03b6af998502e54714635b8f31b556..0a7d350efe9e612cd67d32328cca286dcdcb2991
> 100644
> --- a/cxl/memdev.c
> +++ b/cxl/memdev.c
> @@ -269,8 +269,13 @@ static int __reserve_dpa(struct cxl_memdev *memdev,
>
> if (mode == CXL_DECODER_MODE_RAM)
> avail_dpa = cxl_memdev_get_ram_size(memdev);
> - else
> + else if (mode == CXL_DECODER_MODE_PMEM)
> avail_dpa = cxl_memdev_get_pmem_size(memdev);
> + else if (cxl_decoder_mode_is_dc(mode)) {
> + int i = cxl_decoder_dc_mode_to_index(mode);
> +
> + avail_dpa = cxl_memdev_get_dc_size(memdev, i);
> + }
>
> cxl_decoder_foreach(port, decoder) {
> size = cxl_decoder_get_dpa_size(decoder);
> diff --git a/cxl/region.c b/cxl/region.c
> index
> 207cf2d003148992255c715f286bc0f38de2ca84..310694ae07fae25f13d032a30c130bf7d3394388
> 100644
> --- a/cxl/region.c
> +++ b/cxl/region.c
> @@ -78,7 +78,7 @@ OPT_INTEGER('w', "ways", ¶m.ways, \
> OPT_INTEGER('g', "granularity", ¶m.granularity, \
> "granularity of the interleave set"), \
> OPT_STRING('t', "type", ¶m.type, \
> - "region type", "region type - 'pmem' or 'ram'"), \
> + "region type", "region type - 'pmem', 'ram', 'dcX'"), \
> OPT_STRING('U', "uuid", ¶m.uuid, \
> "region uuid", "uuid for the new region (default: autogenerate)"), \
> OPT_BOOLEAN('m', "memdevs", ¶m.memdevs, \
> @@ -400,9 +400,22 @@ static int parse_region_options(int argc, const char
> **argv,
> }
> }
>
> +static int dc_mode_to_region_index(enum cxl_decoder_mode mode)
> +{
> + int index = 0;
> +
> + for (unsigned int i = CXL_DECODER_MODE_DC0; i <= CXL_DECODER_MODE_DC7;
> i++) {
> + if (mode == i)
> + return index;
> + index++;
> + }
> +
> + return -EINVAL;
> +}
> +
> static void collect_minsize(struct cxl_ctx *ctx, struct parsed_params *p)
> {
> - int i;
> + int i, index;
>
> for (i = 0; i < p->ways; i++) {
> struct json_object *jobj =
> @@ -417,6 +430,10 @@ static void collect_minsize(struct cxl_ctx *ctx, struct
> parsed_params *p)
> case CXL_DECODER_MODE_PMEM:
> size = cxl_memdev_get_pmem_size(memdev);
> break;
> + case CXL_DECODER_MODE_DC0 ... CXL_DECODER_MODE_DC7:
> + index = dc_mode_to_region_index(p->mode);
> + size = cxl_memdev_get_dc_size(memdev, index);
> + break;
> default:
> /* Shouldn't ever get here */ ;
> }
> @@ -473,6 +490,7 @@ static int validate_decoder(struct cxl_decoder *decoder,
> struct parsed_params *p)
> {
> const char *devname = cxl_decoder_get_devname(decoder);
> + int index;
> int rc;
>
> switch(p->mode) {
> @@ -488,6 +506,13 @@ static int validate_decoder(struct cxl_decoder *decoder,
> return -EINVAL;
> }
> break;
> + case CXL_DECODER_MODE_DC0 ... CXL_DECODER_MODE_DC7:
> + index = dc_mode_to_region_index(p->mode);
> + if (!cxl_decoder_is_dc_capable(decoder, index)) {
> + log_err(&rl, "%s is not dc%d capable\n", devname,
> index);
> + return -EINVAL;
> + }
> + break;
> default:
> log_err(&rl, "unknown type: %s\n", param.type);
> return -EINVAL;
> @@ -502,12 +527,25 @@ static int validate_decoder(struct cxl_decoder *decoder,
> return 0;
> }
>
> +static enum cxl_decoder_mode dc_region_index_to_mode(int index)
> +{
> + return (CXL_DECODER_MODE_DC0 + index);
> +}
> +
> static void set_type_from_decoder(struct cxl_ctx *ctx, struct parsed_params
> *p)
> {
> /* if param.type was explicitly specified, nothing to do here */
> if (param.type)
> return;
>
> + /* Only chose DC if it is the only type available */
> + for (int index = 0; index < MAX_NUM_DC_REGIONS; index++) {
> + if (cxl_decoder_is_dc_capable(p->root_decoder, index)) {
> + p->mode = dc_region_index_to_mode(index);
> + break;
> + }
> + }
> +
> /*
> * default to pmem if both types are set, otherwise the single
> * capability dominates.
> @@ -699,6 +737,13 @@ static int create_region(struct cxl_ctx *ctx, int *count,
> param.root_decoder);
> return -ENXIO;
> }
> + } else if (cxl_decoder_mode_is_dc(p->mode)) {
> + region = cxl_decoder_create_dc_region(p->root_decoder, p->mode);
> + if (!region) {
> + log_err(&rl, "failed to create region under %s\n",
> + param.root_decoder);
> + return -ENXIO;
> + }
> } else {
> log_err(&rl, "region type '%s' is not supported\n",
> param.type);
>
> --
> 2.47.0
>
--
Fan Ni
