| Message ID | 20240925024647.46735-6-ying.huang@intel.com |
|---|---|
| State | New |
| Headers | show |
| Series | cxl: Preparation of type2 accelerators support | expand |
On Wed, Sep 25, 2024 at 10:46:47AM +0800, Huang Ying wrote: > The memory range of a type2 accelerator should be managed by the type2 > accelerator specific driver instead of the common dax region drivers, > as discussed in [1]. > > [1] https://lore.kernel.org/linux-cxl/66469ff1b8fbc_2c2629427@dwillia2-xfh.jf.intel.com.notmuch/ > > So, in this patch, we skip dax regions creation for type2 accelerator > device memory regions. > > Based on: https://lore.kernel.org/linux-cxl/168592159835.1948938.1647215579839222774.stgit@dwillia2-xfh.jf.intel.com/ > > Signed-off-by: "Huang, Ying" <ying.huang@intel.com> > Co-developed-by: Dan Williams <dan.j.williams@intel.com> > Signed-off-by: Dan Williams <dan.j.williams@intel.com> > Cc: Davidlohr Bueso <dave@stgolabs.net> > Cc: Jonathan Cameron <jonathan.cameron@huawei.com> > Cc: Dave Jiang <dave.jiang@intel.com> > Cc: Alison Schofield <alison.schofield@intel.com> > Cc: Vishal Verma <vishal.l.verma@intel.com> > Cc: Ira Weiny <ira.weiny@intel.com> > Cc: Alejandro Lucero <alucerop@amd.com> > --- > drivers/cxl/core/region.c | 8 ++++++++ > 1 file changed, 8 insertions(+) > Reviewed-by: Gregory Price <gourry@gourry.net> > diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c > index 9c68ec445128..b276752c38da 100644 > --- a/drivers/cxl/core/region.c > +++ b/drivers/cxl/core/region.c > @@ -3466,6 +3466,14 @@ static int cxl_region_probe(struct device *dev) > p->res->start, p->res->end, cxlr, > is_system_ram) > 0) > return 0; > + /* > + * Accelerator regions have specific usage, skip > + * device-dax registration. > + */ > + if (cxlr->type == CXL_DECODER_ACCEL) > + return 0; > + > + /* Expander routes to device-dax */ > return devm_cxl_add_dax_region(cxlr); > default: > dev_dbg(&cxlr->dev, "unsupported region mode: %d\n", > -- > 2.39.2 >
diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c index 9c68ec445128..b276752c38da 100644 --- a/drivers/cxl/core/region.c +++ b/drivers/cxl/core/region.c @@ -3466,6 +3466,14 @@ static int cxl_region_probe(struct device *dev) p->res->start, p->res->end, cxlr, is_system_ram) > 0) return 0; + /* + * Accelerator regions have specific usage, skip + * device-dax registration. + */ + if (cxlr->type == CXL_DECODER_ACCEL) + return 0; + + /* Expander routes to device-dax */ return devm_cxl_add_dax_region(cxlr); default: dev_dbg(&cxlr->dev, "unsupported region mode: %d\n",