On 5/23/26 2:50 AM, Anisa Su wrote: > From: Ira Weiny <[email protected]> > > Dynamic capacity partitions are exposed as a singular dynamic ram > partition. > > Add CXL library support to read this partition information. > > Signed-off-by: Ira Weiny <[email protected]> Missing Anisa sign off. Can probably squash this and the next commit so the usage is shown for the reviewer. DJ > --- > Documentation/cxl/lib/libcxl.txt | 6 +++-- > cxl/lib/libcxl.c | 43 ++++++++++++++++++++++++++++++++ > cxl/lib/libcxl.sym | 4 +++ > cxl/lib/private.h | 3 +++ > cxl/libcxl.h | 10 +++++++- > 5 files changed, 63 insertions(+), 3 deletions(-) > > diff --git a/Documentation/cxl/lib/libcxl.txt > b/Documentation/cxl/lib/libcxl.txt > index 5c3ebd4..9921ac1 100644 > --- a/Documentation/cxl/lib/libcxl.txt > +++ b/Documentation/cxl/lib/libcxl.txt > @@ -74,6 +74,7 @@ int cxl_memdev_get_major(struct cxl_memdev *memdev); > int cxl_memdev_get_minor(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_dynamic_ram_a_size(struct cxl_memdev > *memdev); > const char *cxl_memdev_get_firmware_version(struct cxl_memdev *memdev); > size_t cxl_memdev_get_label_size(struct cxl_memdev *memdev); > int cxl_memdev_nvdimm_bridge_active(struct cxl_memdev *memdev); > @@ -93,8 +94,8 @@ The character device node for command submission can be > found by default > at /dev/cxl/mem%d, or created with a major / minor returned from > cxl_memdev_get_{major,minor}(). > > -The 'pmem_size' and 'ram_size' attributes return the current > -provisioning of DPA (Device Physical Address / local capacity) in the > +The 'pmem_size', 'ram_size', and 'dynamic_ram_a_size' attributes return the > +current provisioning of DPA (Device Physical Address / local capacity) in the > device. > > cxl_memdev_get_numa_node() returns the affinitized CPU node number if > @@ -453,6 +454,7 @@ enum cxl_decoder_mode { > CXL_DECODER_MODE_MIXED, > CXL_DECODER_MODE_PMEM, > CXL_DECODER_MODE_RAM, > + CXL_DECODER_MODE_DYNAMIC_RAM_A, > }; > 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); > diff --git a/cxl/lib/libcxl.c b/cxl/lib/libcxl.c > index e55a7b4..be0bc03 100644 > --- a/cxl/lib/libcxl.c > +++ b/cxl/lib/libcxl.c > @@ -501,6 +501,9 @@ CXL_EXPORT bool cxl_region_qos_class_mismatch(struct > cxl_region *region) > } else if (region->mode == CXL_DECODER_MODE_PMEM) { > if (root_decoder->qos_class != memdev->pmem_qos_class) > return true; > + } else if (region->mode == CXL_DECODER_MODE_DYNAMIC_RAM_A) { > + if (root_decoder->qos_class != > memdev->dynamic_ram_a_qos_class) > + return true; > } > } > > @@ -1426,6 +1429,10 @@ static void *add_cxl_memdev(void *parent, int id, > const char *cxlmem_base) > if (sysfs_read_attr(ctx, path, buf) == 0) > memdev->ram_size = strtoull(buf, NULL, 0); > > + sprintf(path, "%s/dynamic_ram_a/size", cxlmem_base); > + if (sysfs_read_attr(ctx, path, buf) == 0) > + memdev->dynamic_ram_a_size = strtoull(buf, NULL, 0); > + > sprintf(path, "%s/pmem/qos_class", cxlmem_base); > if (sysfs_read_attr(ctx, path, buf) < 0) > memdev->pmem_qos_class = CXL_QOS_CLASS_NONE; > @@ -1438,6 +1445,12 @@ static void *add_cxl_memdev(void *parent, int id, > const char *cxlmem_base) > else > memdev->ram_qos_class = atoi(buf); > > + sprintf(path, "%s/dynamic_ram_a/qos_class", cxlmem_base); > + if (sysfs_read_attr(ctx, path, buf) < 0) > + memdev->dynamic_ram_a_qos_class = CXL_QOS_CLASS_NONE; > + else > + memdev->dynamic_ram_a_qos_class = atoi(buf); > + > sprintf(path, "%s/payload_max", cxlmem_base); > if (sysfs_read_attr(ctx, path, buf) == 0) { > memdev->payload_max = strtoull(buf, NULL, 0); > @@ -1685,6 +1698,11 @@ CXL_EXPORT unsigned long long > cxl_memdev_get_ram_size(struct cxl_memdev *memdev) > return memdev->ram_size; > } > > +CXL_EXPORT unsigned long long cxl_memdev_get_dynamic_ram_a_size(struct > cxl_memdev *memdev) > +{ > + return memdev->dynamic_ram_a_size; > +} > + > CXL_EXPORT int cxl_memdev_get_pmem_qos_class(struct cxl_memdev *memdev) > { > return memdev->pmem_qos_class; > @@ -1695,6 +1713,11 @@ CXL_EXPORT int cxl_memdev_get_ram_qos_class(struct > cxl_memdev *memdev) > return memdev->ram_qos_class; > } > > +CXL_EXPORT int cxl_memdev_get_dynamic_ram_a_qos_class(struct cxl_memdev > *memdev) > +{ > + return memdev->dynamic_ram_a_qos_class; > +} > + > CXL_EXPORT const char *cxl_memdev_get_firmware_verison(struct cxl_memdev > *memdev) > { > return memdev->firmware_version; > @@ -2465,6 +2488,8 @@ static void *add_cxl_decoder(void *parent, int id, > const char *cxldecoder_base) > decoder->mode = CXL_DECODER_MODE_MIXED; > else if (strcmp(buf, "none") == 0) > decoder->mode = CXL_DECODER_MODE_NONE; > + else if (strcmp(buf, "dynamic_ram_a") == 0) > + decoder->mode = CXL_DECODER_MODE_DYNAMIC_RAM_A; > else > decoder->mode = CXL_DECODER_MODE_MIXED; > } else > @@ -2504,6 +2529,7 @@ 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->dynamic_ram_a_capable = true; > decoder->mem_capable = true; > decoder->accelmem_capable = true; > sprintf(path, "%s/locked", cxldecoder_base); > @@ -2528,6 +2554,7 @@ static void *add_cxl_decoder(void *parent, int id, > const char *cxldecoder_base) > { "cap_type3", &decoder->mem_capable }, > { "cap_ram", &decoder->volatile_capable }, > { "cap_pmem", &decoder->pmem_capable }, > + { "cap_dynamic_ram_a", &decoder->dynamic_ram_a_capable > }, > { "locked", &decoder->locked }, > }; > > @@ -2778,6 +2805,9 @@ CXL_EXPORT int cxl_decoder_set_mode(struct cxl_decoder > *decoder, > case CXL_DECODER_MODE_RAM: > sprintf(buf, "ram"); > break; > + case CXL_DECODER_MODE_DYNAMIC_RAM_A: > + sprintf(buf, "dynamic_ram_a"); > + break; > default: > err(ctx, "%s: unsupported mode: %d\n", > cxl_decoder_get_devname(decoder), mode); > @@ -2829,6 +2859,11 @@ CXL_EXPORT bool cxl_decoder_is_volatile_capable(struct > cxl_decoder *decoder) > return decoder->volatile_capable; > } > > +CXL_EXPORT bool cxl_decoder_is_dynamic_ram_a_capable(struct cxl_decoder > *decoder) > +{ > + return decoder->dynamic_ram_a_capable; > +} > + > CXL_EXPORT bool cxl_decoder_is_mem_capable(struct cxl_decoder *decoder) > { > return decoder->mem_capable; > @@ -2903,6 +2938,8 @@ 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 (mode == CXL_DECODER_MODE_DYNAMIC_RAM_A) > + sprintf(path, "%s/create_dynamic_ram_a_region", > decoder->dev_path); > > rc = sysfs_read_attr(ctx, path, buf); > if (rc < 0) { > @@ -2954,6 +2991,12 @@ 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_dynamic_ram_a_region(struct cxl_decoder *decoder) > +{ > + return cxl_decoder_create_region(decoder, > CXL_DECODER_MODE_DYNAMIC_RAM_A); > +} > + > 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 ed4429f..258bdd3 100644 > --- a/cxl/lib/libcxl.sym > +++ b/cxl/lib/libcxl.sym > @@ -294,6 +294,10 @@ global: > cxl_memdev_get_fwctl; > cxl_fwctl_get_major; > cxl_fwctl_get_minor; > + cxl_memdev_get_dynamic_ram_a_size; > + cxl_memdev_get_dynamic_ram_a_qos_class; > + cxl_decoder_is_dynamic_ram_a_capable; > + cxl_decoder_create_dynamic_ram_a_region; > } LIBECXL_8; > > LIBCXL_10 { > diff --git a/cxl/lib/private.h b/cxl/lib/private.h > index d2d71fc..37b7b06 100644 > --- a/cxl/lib/private.h > +++ b/cxl/lib/private.h > @@ -52,8 +52,10 @@ struct cxl_memdev { > struct list_node list; > unsigned long long pmem_size; > unsigned long long ram_size; > + unsigned long long dynamic_ram_a_size; > int ram_qos_class; > int pmem_qos_class; > + int dynamic_ram_a_qos_class; > int payload_max; > size_t lsa_size; > struct kmod_module *module; > @@ -159,6 +161,7 @@ struct cxl_decoder { > unsigned int interleave_granularity; > bool pmem_capable; > bool volatile_capable; > + bool dynamic_ram_a_capable; > bool mem_capable; > bool accelmem_capable; > bool locked; > diff --git a/cxl/libcxl.h b/cxl/libcxl.h > index e91af90..fd41122 100644 > --- a/cxl/libcxl.h > +++ b/cxl/libcxl.h > @@ -75,8 +75,10 @@ struct cxl_fwctl *cxl_memdev_get_fwctl(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_dynamic_ram_a_size(struct cxl_memdev > *memdev); > int cxl_memdev_get_pmem_qos_class(struct cxl_memdev *memdev); > int cxl_memdev_get_ram_qos_class(struct cxl_memdev *memdev); > +int cxl_memdev_get_dynamic_ram_a_qos_class(struct cxl_memdev *memdev); > const char *cxl_memdev_get_firmware_verison(struct cxl_memdev *memdev); > bool cxl_memdev_fw_update_in_progress(struct cxl_memdev *memdev); > size_t cxl_memdev_fw_update_get_remaining(struct cxl_memdev *memdev); > @@ -210,6 +212,7 @@ enum cxl_decoder_mode { > CXL_DECODER_MODE_MIXED, > CXL_DECODER_MODE_PMEM, > CXL_DECODER_MODE_RAM, > + CXL_DECODER_MODE_DYNAMIC_RAM_A, > }; > > static inline const char *cxl_decoder_mode_name(enum cxl_decoder_mode mode) > @@ -219,9 +222,10 @@ 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_DYNAMIC_RAM_A] = "dynamic_ram_a", > }; > > - if (mode < CXL_DECODER_MODE_NONE || mode > CXL_DECODER_MODE_RAM) > + if (mode < CXL_DECODER_MODE_NONE || mode > > CXL_DECODER_MODE_DYNAMIC_RAM_A) > mode = CXL_DECODER_MODE_NONE; > return names[mode]; > } > @@ -235,6 +239,8 @@ 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, "dynamic_ram_a") == 0) > + return CXL_DECODER_MODE_DYNAMIC_RAM_A; > return CXL_DECODER_MODE_NONE; > } > > @@ -264,6 +270,7 @@ cxl_decoder_get_target_type(struct cxl_decoder *decoder); > bool cxl_decoder_is_pmem_capable(struct cxl_decoder *decoder); > bool cxl_decoder_is_volatile_capable(struct cxl_decoder *decoder); > bool cxl_decoder_is_mem_capable(struct cxl_decoder *decoder); > +bool cxl_decoder_is_dynamic_ram_a_capable(struct cxl_decoder *decoder); > bool cxl_decoder_is_accelmem_capable(struct cxl_decoder *decoder); > bool cxl_decoder_is_locked(struct cxl_decoder *decoder); > unsigned int > @@ -272,6 +279,7 @@ 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_dynamic_ram_a_region(struct > cxl_decoder *decoder); > 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);
