| Message ID | 20240816-dcd-type2-upstream-v3-8-7c9b96cba6d7@intel.com |
|---|---|
| State | New |
| Headers | show |
| Series | DCD: Add support for Dynamic Capacity Devices (DCD) | expand |
On 8/16/24 7:44 AM, ira.weiny@intel.com wrote: > From: Navneet Singh <navneet.singh@intel.com> > > One or more decoders each pointing to a Dynamic Capacity (DC) partition > form a CXL software region. The region mode reflects composition of > that entire software region. Decoder mode reflects a specific DC > partition. DC partitions are also known as DC regions per CXL > specification r3.1. > > Define the new modes and helper functions required to make the > association between these new modes. > > Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> > Reviewed-by: Fan Ni <fan.ni@samsung.com> > Signed-off-by: Navneet Singh <navneet.singh@intel.com> > Co-developed-by: Ira Weiny <ira.weiny@intel.com> > Signed-off-by: Ira Weiny <ira.weiny@intel.com> Reviewed-by: Dave Jiang <dave.jiang@intel.com> > > --- > Changes: > [iweiny: keep tags on simple patch] > [Fan: s/partitions/partition/] > [djiang: New wording for the commit message] > [iweiny: reword commit message more] > --- > drivers/cxl/core/region.c | 4 ++++ > drivers/cxl/cxl.h | 23 +++++++++++++++++++++++ > 2 files changed, 27 insertions(+) > > diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c > index 796e5a791e44..650fe33f2ed4 100644 > --- a/drivers/cxl/core/region.c > +++ b/drivers/cxl/core/region.c > @@ -1870,6 +1870,8 @@ static bool cxl_modes_compatible(enum cxl_region_mode rmode, > return true; > if (rmode == CXL_REGION_PMEM && dmode == CXL_DECODER_PMEM) > return true; > + if (rmode == CXL_REGION_DC && cxl_decoder_mode_is_dc(dmode)) > + return true; > > return false; > } > @@ -3239,6 +3241,8 @@ cxl_decoder_to_region_mode(enum cxl_decoder_mode mode) > return CXL_REGION_RAM; > case CXL_DECODER_PMEM: > return CXL_REGION_PMEM; > + case CXL_DECODER_DC0 ... CXL_DECODER_DC7: > + return CXL_REGION_DC; > case CXL_DECODER_MIXED: > default: > return CXL_REGION_MIXED; > diff --git a/drivers/cxl/cxl.h b/drivers/cxl/cxl.h > index f766b2a8bf53..d2674ab46f35 100644 > --- a/drivers/cxl/cxl.h > +++ b/drivers/cxl/cxl.h > @@ -370,6 +370,14 @@ enum cxl_decoder_mode { > CXL_DECODER_NONE, > CXL_DECODER_RAM, > CXL_DECODER_PMEM, > + CXL_DECODER_DC0, > + CXL_DECODER_DC1, > + CXL_DECODER_DC2, > + CXL_DECODER_DC3, > + CXL_DECODER_DC4, > + CXL_DECODER_DC5, > + CXL_DECODER_DC6, > + CXL_DECODER_DC7, > CXL_DECODER_MIXED, > CXL_DECODER_DEAD, > }; > @@ -380,6 +388,14 @@ static inline const char *cxl_decoder_mode_name(enum cxl_decoder_mode mode) > [CXL_DECODER_NONE] = "none", > [CXL_DECODER_RAM] = "ram", > [CXL_DECODER_PMEM] = "pmem", > + [CXL_DECODER_DC0] = "dc0", > + [CXL_DECODER_DC1] = "dc1", > + [CXL_DECODER_DC2] = "dc2", > + [CXL_DECODER_DC3] = "dc3", > + [CXL_DECODER_DC4] = "dc4", > + [CXL_DECODER_DC5] = "dc5", > + [CXL_DECODER_DC6] = "dc6", > + [CXL_DECODER_DC7] = "dc7", > [CXL_DECODER_MIXED] = "mixed", > }; > > @@ -388,10 +404,16 @@ static inline const char *cxl_decoder_mode_name(enum cxl_decoder_mode mode) > return "mixed"; > } > > +static inline bool cxl_decoder_mode_is_dc(enum cxl_decoder_mode mode) > +{ > + return (mode >= CXL_DECODER_DC0 && mode <= CXL_DECODER_DC7); > +} > + > enum cxl_region_mode { > CXL_REGION_NONE, > CXL_REGION_RAM, > CXL_REGION_PMEM, > + CXL_REGION_DC, > CXL_REGION_MIXED, > }; > > @@ -401,6 +423,7 @@ static inline const char *cxl_region_mode_name(enum cxl_region_mode mode) > [CXL_REGION_NONE] = "none", > [CXL_REGION_RAM] = "ram", > [CXL_REGION_PMEM] = "pmem", > + [CXL_REGION_DC] = "dc", > [CXL_REGION_MIXED] = "mixed", > }; > >
On 8/16/2024 10:44 PM, ira.weiny@intel.com wrote: > From: Navneet Singh <navneet.singh@intel.com> > > One or more decoders each pointing to a Dynamic Capacity (DC) partition > form a CXL software region. The region mode reflects composition of > that entire software region. Decoder mode reflects a specific DC > partition. DC partitions are also known as DC regions per CXL > specification r3.1. > > Define the new modes and helper functions required to make the > association between these new modes. > > Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> > Reviewed-by: Fan Ni <fan.ni@samsung.com> > Signed-off-by: Navneet Singh <navneet.singh@intel.com> > Co-developed-by: Ira Weiny <ira.weiny@intel.com> > Signed-off-by: Ira Weiny <ira.weiny@intel.com> > Reviewed-by: Li Ming <ming4.li@intel.com>
diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c index 796e5a791e44..650fe33f2ed4 100644 --- a/drivers/cxl/core/region.c +++ b/drivers/cxl/core/region.c @@ -1870,6 +1870,8 @@ static bool cxl_modes_compatible(enum cxl_region_mode rmode, return true; if (rmode == CXL_REGION_PMEM && dmode == CXL_DECODER_PMEM) return true; + if (rmode == CXL_REGION_DC && cxl_decoder_mode_is_dc(dmode)) + return true; return false; } @@ -3239,6 +3241,8 @@ cxl_decoder_to_region_mode(enum cxl_decoder_mode mode) return CXL_REGION_RAM; case CXL_DECODER_PMEM: return CXL_REGION_PMEM; + case CXL_DECODER_DC0 ... CXL_DECODER_DC7: + return CXL_REGION_DC; case CXL_DECODER_MIXED: default: return CXL_REGION_MIXED; diff --git a/drivers/cxl/cxl.h b/drivers/cxl/cxl.h index f766b2a8bf53..d2674ab46f35 100644 --- a/drivers/cxl/cxl.h +++ b/drivers/cxl/cxl.h @@ -370,6 +370,14 @@ enum cxl_decoder_mode { CXL_DECODER_NONE, CXL_DECODER_RAM, CXL_DECODER_PMEM, + CXL_DECODER_DC0, + CXL_DECODER_DC1, + CXL_DECODER_DC2, + CXL_DECODER_DC3, + CXL_DECODER_DC4, + CXL_DECODER_DC5, + CXL_DECODER_DC6, + CXL_DECODER_DC7, CXL_DECODER_MIXED, CXL_DECODER_DEAD, }; @@ -380,6 +388,14 @@ static inline const char *cxl_decoder_mode_name(enum cxl_decoder_mode mode) [CXL_DECODER_NONE] = "none", [CXL_DECODER_RAM] = "ram", [CXL_DECODER_PMEM] = "pmem", + [CXL_DECODER_DC0] = "dc0", + [CXL_DECODER_DC1] = "dc1", + [CXL_DECODER_DC2] = "dc2", + [CXL_DECODER_DC3] = "dc3", + [CXL_DECODER_DC4] = "dc4", + [CXL_DECODER_DC5] = "dc5", + [CXL_DECODER_DC6] = "dc6", + [CXL_DECODER_DC7] = "dc7", [CXL_DECODER_MIXED] = "mixed", }; @@ -388,10 +404,16 @@ static inline const char *cxl_decoder_mode_name(enum cxl_decoder_mode mode) return "mixed"; } +static inline bool cxl_decoder_mode_is_dc(enum cxl_decoder_mode mode) +{ + return (mode >= CXL_DECODER_DC0 && mode <= CXL_DECODER_DC7); +} + enum cxl_region_mode { CXL_REGION_NONE, CXL_REGION_RAM, CXL_REGION_PMEM, + CXL_REGION_DC, CXL_REGION_MIXED, }; @@ -401,6 +423,7 @@ static inline const char *cxl_region_mode_name(enum cxl_region_mode mode) [CXL_REGION_NONE] = "none", [CXL_REGION_RAM] = "ram", [CXL_REGION_PMEM] = "pmem", + [CXL_REGION_DC] = "dc", [CXL_REGION_MIXED] = "mixed", };