| Message ID | 1603442745-13085-3-git-send-email-yilun.xu@intel.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | Add the netdev support for Intel PAC N3000 FPGA | expand |
On 10/23/20 1:45 AM, Xu Yilun wrote: > This patch makes preparation for supporting DFL Ether Group private > feature driver, which reads bitstream_id.vendor_net_cfg field to > determin the interconnection of network components on FPGA device. > > Signed-off-by: Xu Yilun <yilun.xu@intel.com> > --- > drivers/fpga/dfl-fme-main.c | 10 ++-------- > drivers/fpga/dfl.c | 21 +++++++++++++++++++++ > drivers/fpga/dfl.h | 12 ++++++++++++ > include/linux/dfl.h | 2 ++ > 4 files changed, 37 insertions(+), 8 deletions(-) > > diff --git a/drivers/fpga/dfl-fme-main.c b/drivers/fpga/dfl-fme-main.c > index 77ea04d..a2b8ba0 100644 > --- a/drivers/fpga/dfl-fme-main.c > +++ b/drivers/fpga/dfl-fme-main.c > @@ -46,14 +46,8 @@ static DEVICE_ATTR_RO(ports_num); > static ssize_t bitstream_id_show(struct device *dev, > struct device_attribute *attr, char *buf) > { > - void __iomem *base; > - u64 v; > - > - base = dfl_get_feature_ioaddr_by_id(dev, FME_FEATURE_ID_HEADER); > - > - v = readq(base + FME_HDR_BITSTREAM_ID); > - > - return scnprintf(buf, PAGE_SIZE, "0x%llx\n", (unsigned long long)v); > + return scnprintf(buf, PAGE_SIZE, "0x%llx\n", > + (unsigned long long)dfl_get_bitstream_id(dev)); should use sysfs_emit() > } > static DEVICE_ATTR_RO(bitstream_id); > > diff --git a/drivers/fpga/dfl.c b/drivers/fpga/dfl.c > index bc35750..ca3c678 100644 > --- a/drivers/fpga/dfl.c > +++ b/drivers/fpga/dfl.c > @@ -537,6 +537,27 @@ void dfl_driver_unregister(struct dfl_driver *dfl_drv) > } > EXPORT_SYMBOL(dfl_driver_unregister); > > +int dfl_dev_get_vendor_net_cfg(struct dfl_device *dfl_dev) > +{ > + struct device *fme_dev; > + u64 v; > + > + if (!dfl_dev) > + return -EINVAL; > + > + if (dfl_dev->type == FME_ID) > + fme_dev = dfl_dev->dev.parent; > + else > + fme_dev = dfl_dev->cdev->fme_dev; > + > + if (!fme_dev) > + return -EINVAL; > + > + v = dfl_get_bitstream_id(fme_dev); > + return (int)FIELD_GET(FME_BID_VENDOR_NET_CFG, v); > +} > +EXPORT_SYMBOL_GPL(dfl_dev_get_vendor_net_cfg); > + > #define is_header_feature(feature) ((feature)->id == FEATURE_ID_FIU_HEADER) > > /** > diff --git a/drivers/fpga/dfl.h b/drivers/fpga/dfl.h > index 2b82c96..6c7a6961 100644 > --- a/drivers/fpga/dfl.h > +++ b/drivers/fpga/dfl.h > @@ -104,6 +104,9 @@ > #define FME_CAP_CACHE_SIZE GENMASK_ULL(43, 32) /* cache size in KB */ > #define FME_CAP_CACHE_ASSOC GENMASK_ULL(47, 44) /* Associativity */ > > +/* FME BITSTREAM_ID Register Bitfield */ > +#define FME_BID_VENDOR_NET_CFG GENMASK_ULL(35, 32) /* vendor net cfg */ Are there any other similar #defines that could be added here for completeness? > + > /* FME Port Offset Register Bitfield */ > /* Offset to port device feature header */ > #define FME_PORT_OFST_DFH_OFST GENMASK_ULL(23, 0) > @@ -397,6 +400,15 @@ static inline bool is_dfl_feature_present(struct device *dev, u16 id) > return !!dfl_get_feature_ioaddr_by_id(dev, id); > } > > +static inline u64 dfl_get_bitstream_id(struct device *dev) > +{ > + void __iomem *base; > + > + base = dfl_get_feature_ioaddr_by_id(dev, FME_FEATURE_ID_HEADER); > + > + return readq(base + FME_HDR_BITSTREAM_ID); > +} This is is a generic change and should be split out. Tom > + > static inline > struct device *dfl_fpga_pdata_to_parent(struct dfl_feature_platform_data *pdata) > { > diff --git a/include/linux/dfl.h b/include/linux/dfl.h > index e1b2471..5ee2b1e 100644 > --- a/include/linux/dfl.h > +++ b/include/linux/dfl.h > @@ -67,6 +67,8 @@ struct dfl_driver { > #define to_dfl_dev(d) container_of(d, struct dfl_device, dev) > #define to_dfl_drv(d) container_of(d, struct dfl_driver, drv) > > +int dfl_dev_get_vendor_net_cfg(struct dfl_device *dfl_dev); > + > /* > * use a macro to avoid include chaining to get THIS_MODULE. > */
> Subject: [RFC PATCH 2/6] fpga: dfl: export network configuration info for DFL > based FPGA > > This patch makes preparation for supporting DFL Ether Group private > feature driver, which reads bitstream_id.vendor_net_cfg field to > determin the interconnection of network components on FPGA device. > > Signed-off-by: Xu Yilun <yilun.xu@intel.com> > --- > drivers/fpga/dfl-fme-main.c | 10 ++-------- > drivers/fpga/dfl.c | 21 +++++++++++++++++++++ > drivers/fpga/dfl.h | 12 ++++++++++++ > include/linux/dfl.h | 2 ++ > 4 files changed, 37 insertions(+), 8 deletions(-) > > diff --git a/drivers/fpga/dfl-fme-main.c b/drivers/fpga/dfl-fme-main.c > index 77ea04d..a2b8ba0 100644 > --- a/drivers/fpga/dfl-fme-main.c > +++ b/drivers/fpga/dfl-fme-main.c > @@ -46,14 +46,8 @@ static DEVICE_ATTR_RO(ports_num); > static ssize_t bitstream_id_show(struct device *dev, > struct device_attribute *attr, char *buf) > { > - void __iomem *base; > - u64 v; > - > - base = dfl_get_feature_ioaddr_by_id(dev, > FME_FEATURE_ID_HEADER); > - > - v = readq(base + FME_HDR_BITSTREAM_ID); > - > - return scnprintf(buf, PAGE_SIZE, "0x%llx\n", (unsigned long long)v); > + return scnprintf(buf, PAGE_SIZE, "0x%llx\n", > + (unsigned long long)dfl_get_bitstream_id(dev)); > } > static DEVICE_ATTR_RO(bitstream_id); > > diff --git a/drivers/fpga/dfl.c b/drivers/fpga/dfl.c > index bc35750..ca3c678 100644 > --- a/drivers/fpga/dfl.c > +++ b/drivers/fpga/dfl.c > @@ -537,6 +537,27 @@ void dfl_driver_unregister(struct dfl_driver *dfl_drv) > } > EXPORT_SYMBOL(dfl_driver_unregister); > > +int dfl_dev_get_vendor_net_cfg(struct dfl_device *dfl_dev) > +{ > + struct device *fme_dev; > + u64 v; > + > + if (!dfl_dev) > + return -EINVAL; > + > + if (dfl_dev->type == FME_ID) > + fme_dev = dfl_dev->dev.parent; > + else > + fme_dev = dfl_dev->cdev->fme_dev; All of them have cdev, is my understanding correct? If so, why handle it differently here? > + > + if (!fme_dev) > + return -EINVAL; ENODEV? > + > + v = dfl_get_bitstream_id(fme_dev); > + return (int)FIELD_GET(FME_BID_VENDOR_NET_CFG, v); > +} > +EXPORT_SYMBOL_GPL(dfl_dev_get_vendor_net_cfg); > + > #define is_header_feature(feature) ((feature)->id == > FEATURE_ID_FIU_HEADER) > > /** > diff --git a/drivers/fpga/dfl.h b/drivers/fpga/dfl.h > index 2b82c96..6c7a6961 100644 > --- a/drivers/fpga/dfl.h > +++ b/drivers/fpga/dfl.h > @@ -104,6 +104,9 @@ > #define FME_CAP_CACHE_SIZE GENMASK_ULL(43, 32) /* cache size > in KB */ > #define FME_CAP_CACHE_ASSOC GENMASK_ULL(47, 44) /* > Associativity */ > > +/* FME BITSTREAM_ID Register Bitfield */ Bitstream ID, same style as others. > +#define FME_BID_VENDOR_NET_CFG GENMASK_ULL(35, 32) /* vendor > net cfg */ > + > /* FME Port Offset Register Bitfield */ > /* Offset to port device feature header */ > #define FME_PORT_OFST_DFH_OFST GENMASK_ULL(23, 0) > @@ -397,6 +400,15 @@ static inline bool is_dfl_feature_present(struct > device *dev, u16 id) > return !!dfl_get_feature_ioaddr_by_id(dev, id); > } > > +static inline u64 dfl_get_bitstream_id(struct device *dev) > +{ > + void __iomem *base; > + > + base = dfl_get_feature_ioaddr_by_id(dev, > FME_FEATURE_ID_HEADER); > + > + return readq(base + FME_HDR_BITSTREAM_ID); > +} > + > static inline > struct device *dfl_fpga_pdata_to_parent(struct dfl_feature_platform_data > *pdata) > { > diff --git a/include/linux/dfl.h b/include/linux/dfl.h > index e1b2471..5ee2b1e 100644 > --- a/include/linux/dfl.h > +++ b/include/linux/dfl.h > @@ -67,6 +67,8 @@ struct dfl_driver { > #define to_dfl_dev(d) container_of(d, struct dfl_device, dev) > #define to_dfl_drv(d) container_of(d, struct dfl_driver, drv) > > +int dfl_dev_get_vendor_net_cfg(struct dfl_device *dfl_dev); It seems the vendor net configuration can be provided by a vendor specific method. So bid_vendor_net_cfg maybe a better name? Thanks Hao > + > /* > * use a macro to avoid include chaining to get THIS_MODULE. > */ > -- > 2.7.4
diff --git a/drivers/fpga/dfl-fme-main.c b/drivers/fpga/dfl-fme-main.c index 77ea04d..a2b8ba0 100644 --- a/drivers/fpga/dfl-fme-main.c +++ b/drivers/fpga/dfl-fme-main.c @@ -46,14 +46,8 @@ static DEVICE_ATTR_RO(ports_num); static ssize_t bitstream_id_show(struct device *dev, struct device_attribute *attr, char *buf) { - void __iomem *base; - u64 v; - - base = dfl_get_feature_ioaddr_by_id(dev, FME_FEATURE_ID_HEADER); - - v = readq(base + FME_HDR_BITSTREAM_ID); - - return scnprintf(buf, PAGE_SIZE, "0x%llx\n", (unsigned long long)v); + return scnprintf(buf, PAGE_SIZE, "0x%llx\n", + (unsigned long long)dfl_get_bitstream_id(dev)); } static DEVICE_ATTR_RO(bitstream_id); diff --git a/drivers/fpga/dfl.c b/drivers/fpga/dfl.c index bc35750..ca3c678 100644 --- a/drivers/fpga/dfl.c +++ b/drivers/fpga/dfl.c @@ -537,6 +537,27 @@ void dfl_driver_unregister(struct dfl_driver *dfl_drv) } EXPORT_SYMBOL(dfl_driver_unregister); +int dfl_dev_get_vendor_net_cfg(struct dfl_device *dfl_dev) +{ + struct device *fme_dev; + u64 v; + + if (!dfl_dev) + return -EINVAL; + + if (dfl_dev->type == FME_ID) + fme_dev = dfl_dev->dev.parent; + else + fme_dev = dfl_dev->cdev->fme_dev; + + if (!fme_dev) + return -EINVAL; + + v = dfl_get_bitstream_id(fme_dev); + return (int)FIELD_GET(FME_BID_VENDOR_NET_CFG, v); +} +EXPORT_SYMBOL_GPL(dfl_dev_get_vendor_net_cfg); + #define is_header_feature(feature) ((feature)->id == FEATURE_ID_FIU_HEADER) /** diff --git a/drivers/fpga/dfl.h b/drivers/fpga/dfl.h index 2b82c96..6c7a6961 100644 --- a/drivers/fpga/dfl.h +++ b/drivers/fpga/dfl.h @@ -104,6 +104,9 @@ #define FME_CAP_CACHE_SIZE GENMASK_ULL(43, 32) /* cache size in KB */ #define FME_CAP_CACHE_ASSOC GENMASK_ULL(47, 44) /* Associativity */ +/* FME BITSTREAM_ID Register Bitfield */ +#define FME_BID_VENDOR_NET_CFG GENMASK_ULL(35, 32) /* vendor net cfg */ + /* FME Port Offset Register Bitfield */ /* Offset to port device feature header */ #define FME_PORT_OFST_DFH_OFST GENMASK_ULL(23, 0) @@ -397,6 +400,15 @@ static inline bool is_dfl_feature_present(struct device *dev, u16 id) return !!dfl_get_feature_ioaddr_by_id(dev, id); } +static inline u64 dfl_get_bitstream_id(struct device *dev) +{ + void __iomem *base; + + base = dfl_get_feature_ioaddr_by_id(dev, FME_FEATURE_ID_HEADER); + + return readq(base + FME_HDR_BITSTREAM_ID); +} + static inline struct device *dfl_fpga_pdata_to_parent(struct dfl_feature_platform_data *pdata) { diff --git a/include/linux/dfl.h b/include/linux/dfl.h index e1b2471..5ee2b1e 100644 --- a/include/linux/dfl.h +++ b/include/linux/dfl.h @@ -67,6 +67,8 @@ struct dfl_driver { #define to_dfl_dev(d) container_of(d, struct dfl_device, dev) #define to_dfl_drv(d) container_of(d, struct dfl_driver, drv) +int dfl_dev_get_vendor_net_cfg(struct dfl_device *dfl_dev); + /* * use a macro to avoid include chaining to get THIS_MODULE. */
This patch makes preparation for supporting DFL Ether Group private feature driver, which reads bitstream_id.vendor_net_cfg field to determin the interconnection of network components on FPGA device. Signed-off-by: Xu Yilun <yilun.xu@intel.com> --- drivers/fpga/dfl-fme-main.c | 10 ++-------- drivers/fpga/dfl.c | 21 +++++++++++++++++++++ drivers/fpga/dfl.h | 12 ++++++++++++ include/linux/dfl.h | 2 ++ 4 files changed, 37 insertions(+), 8 deletions(-)