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[173.79.56.208]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-6dd17fdc7ebsm185156236d6.0.2025.01.07.15.15.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 07 Jan 2025 15:15:48 -0800 (PST) Date: Tue, 7 Jan 2025 18:15:46 -0500 From: Gregory Price To: Robert Richter Cc: Alison Schofield , Vishal Verma , Ira Weiny , Dan Williams , Jonathan Cameron , Dave Jiang , Davidlohr Bueso , linux-cxl@vger.kernel.org, linux-kernel@vger.kernel.org, "Fabio M. De Francesco" , Terry Bowman Subject: Re: [PATCH v1 29/29] cxl: Show message when a decoder was added to a port Message-ID: References: <20250107141015.3367194-1-rrichter@amd.com> <20250107141015.3367194-30-rrichter@amd.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250107141015.3367194-30-rrichter@amd.com> On Tue, Jan 07, 2025 at 03:10:15PM +0100, Robert Richter wrote: > Improve debugging by adding and unifying messages whenever a decoder > was added to a port. It is especially useful to get the decoder > mapping of the involved CXL host bridge or PCI device. This avoids a > complex lookup of the decoder/port/device mappings in sysfs. It would be nice if we could create some of these links in the absense of the full configuration, but I understand why that's difficult. > > Signed-off-by: Robert Richter Reviewed-by: Gregory Price > --- > drivers/cxl/acpi.c | 10 +++++++++- > drivers/cxl/core/hdm.c | 3 ++- > 2 files changed, 11 insertions(+), 2 deletions(-) > > diff --git a/drivers/cxl/acpi.c b/drivers/cxl/acpi.c > index b42cffd6751f..ac74b6f6dad7 100644 > --- a/drivers/cxl/acpi.c > +++ b/drivers/cxl/acpi.c > @@ -421,7 +421,15 @@ static int __cxl_parse_cfmws(struct acpi_cedt_cfmws *cfmws, > rc = cxl_decoder_add(cxld, target_map); > if (rc) > return rc; > - return cxl_root_decoder_autoremove(dev, no_free_ptr(cxlrd)); > + > + rc = cxl_root_decoder_autoremove(dev, no_free_ptr(cxlrd)); > + if (rc) > + return rc; > + > + dev_dbg(root_port->dev.parent, "%s added to %s\n", > + dev_name(&cxld->dev), dev_name(&root_port->dev)); > + > + return 0; > } > > static int cxl_parse_cfmws(union acpi_subtable_headers *header, void *arg, > diff --git a/drivers/cxl/core/hdm.c b/drivers/cxl/core/hdm.c > index 28edd5822486..7d6778f908c8 100644 > --- a/drivers/cxl/core/hdm.c > +++ b/drivers/cxl/core/hdm.c > @@ -34,7 +34,8 @@ static int add_hdm_decoder(struct cxl_port *port, struct cxl_decoder *cxld, > if (rc) > return rc; > > - dev_dbg(&cxld->dev, "Added to port %s\n", dev_name(&port->dev)); > + dev_dbg(port->uport_dev, "%s added to %s\n", > + dev_name(&cxld->dev), dev_name(&port->dev)); > > return 0; > } > -- > 2.39.5 >