| Message ID | 20210629121214.988036-2-martin@geanix.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | fpga/mfd/hwmon: Initial support for Silicom N5010 PAC | expand |
> Subject: [PATCH v3 1/4] fpga: dfl: expose feature revision from struct dfl_device > > From: Martin Hundebøll <mhu@silicom.dk> > > DFL device drivers have a common need for checking feature revision > information from the DFL header, as well as other common DFL information > like the already exposed feature id and type. > > This patch exposes the feature revision information directly via the DFL > device data structure. > > Since the DFL core code has already read the DFL header, this this patch > saves additional mmio reads from DFL device drivers too. > > Signed-off-by: Martin Hundebøll <mhu@silicom.dk> Acked-by: Wu Hao <hao.wu@intel.com> Thanks! Hao > --- > > Changes since v2: > * Reworded commit message as per Hao's suggestion > > Changes since v1: > * This patch replaces the previous patch 2 and exposes the feature > revision through struct dfl_device instead of a helper reading from > io-mem > > drivers/fpga/dfl.c | 27 +++++++++++++++++---------- > drivers/fpga/dfl.h | 1 + > include/linux/dfl.h | 1 + > 3 files changed, 19 insertions(+), 10 deletions(-) > > diff --git a/drivers/fpga/dfl.c b/drivers/fpga/dfl.c > index 511b20ff35a3..9381c579d1cd 100644 > --- a/drivers/fpga/dfl.c > +++ b/drivers/fpga/dfl.c > @@ -381,6 +381,7 @@ dfl_dev_add(struct dfl_feature_platform_data *pdata, > > ddev->type = feature_dev_id_type(pdev); > ddev->feature_id = feature->id; > + ddev->revision = feature->revision; > ddev->cdev = pdata->dfl_cdev; > > /* add mmio resource */ > @@ -717,6 +718,7 @@ struct build_feature_devs_info { > */ > struct dfl_feature_info { > u16 fid; > + u8 rev; > struct resource mmio_res; > void __iomem *ioaddr; > struct list_head node; > @@ -796,6 +798,7 @@ static int build_info_commit_dev(struct > build_feature_devs_info *binfo) > /* save resource information for each feature */ > feature->dev = fdev; > feature->id = finfo->fid; > + feature->revision = finfo->rev; > > /* > * the FIU header feature has some fundamental functions > (sriov > @@ -910,19 +913,17 @@ static void build_info_free(struct > build_feature_devs_info *binfo) > devm_kfree(binfo->dev, binfo); > } > > -static inline u32 feature_size(void __iomem *start) > +static inline u32 feature_size(u64 value) > { > - u64 v = readq(start + DFH); > - u32 ofst = FIELD_GET(DFH_NEXT_HDR_OFST, v); > + u32 ofst = FIELD_GET(DFH_NEXT_HDR_OFST, value); > /* workaround for private features with invalid size, use 4K instead */ > return ofst ? ofst : 4096; > } > > -static u16 feature_id(void __iomem *start) > +static u16 feature_id(u64 value) > { > - u64 v = readq(start + DFH); > - u16 id = FIELD_GET(DFH_ID, v); > - u8 type = FIELD_GET(DFH_TYPE, v); > + u16 id = FIELD_GET(DFH_ID, value); > + u8 type = FIELD_GET(DFH_TYPE, value); > > if (type == DFH_TYPE_FIU) > return FEATURE_ID_FIU_HEADER; > @@ -1021,10 +1022,15 @@ create_feature_instance(struct > build_feature_devs_info *binfo, > unsigned int irq_base, nr_irqs; > struct dfl_feature_info *finfo; > int ret; > + u8 rev; > + u64 v; > + > + v = readq(binfo->ioaddr + ofst); > + rev = FIELD_GET(DFH_REVISION, v); > > /* read feature size and id if inputs are invalid */ > - size = size ? size : feature_size(binfo->ioaddr + ofst); > - fid = fid ? fid : feature_id(binfo->ioaddr + ofst); > + size = size ? size : feature_size(v); > + fid = fid ? fid : feature_id(v); > > if (binfo->len - ofst < size) > return -EINVAL; > @@ -1038,6 +1044,7 @@ create_feature_instance(struct > build_feature_devs_info *binfo, > return -ENOMEM; > > finfo->fid = fid; > + finfo->rev = rev; > finfo->mmio_res.start = binfo->start + ofst; > finfo->mmio_res.end = finfo->mmio_res.start + size - 1; > finfo->mmio_res.flags = IORESOURCE_MEM; > @@ -1166,7 +1173,7 @@ static int parse_feature_private(struct > build_feature_devs_info *binfo, > { > if (!is_feature_dev_detected(binfo)) { > dev_err(binfo->dev, "the private feature 0x%x does not belong > to any AFU.\n", > - feature_id(binfo->ioaddr + ofst)); > + feature_id(readq(binfo->ioaddr + ofst))); > return -EINVAL; > } > > diff --git a/drivers/fpga/dfl.h b/drivers/fpga/dfl.h > index 2b82c96ba56c..422157cfd742 100644 > --- a/drivers/fpga/dfl.h > +++ b/drivers/fpga/dfl.h > @@ -243,6 +243,7 @@ struct dfl_feature_irq_ctx { > struct dfl_feature { > struct platform_device *dev; > u16 id; > + u8 revision; > int resource_index; > void __iomem *ioaddr; > struct dfl_feature_irq_ctx *irq_ctx; > diff --git a/include/linux/dfl.h b/include/linux/dfl.h > index 6cc10982351a..431636a0dc78 100644 > --- a/include/linux/dfl.h > +++ b/include/linux/dfl.h > @@ -38,6 +38,7 @@ struct dfl_device { > int id; > u16 type; > u16 feature_id; > + u8 revision; > struct resource mmio_res; > int *irqs; > unsigned int num_irqs; > -- > 2.31.0
On Tue, 29 Jun 2021, Martin Hundebøll wrote: > From: Martin Hundebøll <mhu@silicom.dk> > > DFL device drivers have a common need for checking feature revision > information from the DFL header, as well as other common DFL information > like the already exposed feature id and type. > > This patch exposes the feature revision information directly via the DFL > device data structure. > > Since the DFL core code has already read the DFL header, this this patch > saves additional mmio reads from DFL device drivers too. > > Signed-off-by: Martin Hundebøll <mhu@silicom.dk> Acked-by: Matthew Gerlach <matthew.gerlach@linux.intel.com> > --- > > Changes since v2: > * Reworded commit message as per Hao's suggestion > > Changes since v1: > * This patch replaces the previous patch 2 and exposes the feature > revision through struct dfl_device instead of a helper reading from > io-mem > > drivers/fpga/dfl.c | 27 +++++++++++++++++---------- > drivers/fpga/dfl.h | 1 + > include/linux/dfl.h | 1 + > 3 files changed, 19 insertions(+), 10 deletions(-) > > diff --git a/drivers/fpga/dfl.c b/drivers/fpga/dfl.c > index 511b20ff35a3..9381c579d1cd 100644 > --- a/drivers/fpga/dfl.c > +++ b/drivers/fpga/dfl.c > @@ -381,6 +381,7 @@ dfl_dev_add(struct dfl_feature_platform_data *pdata, > > ddev->type = feature_dev_id_type(pdev); > ddev->feature_id = feature->id; > + ddev->revision = feature->revision; > ddev->cdev = pdata->dfl_cdev; > > /* add mmio resource */ > @@ -717,6 +718,7 @@ struct build_feature_devs_info { > */ > struct dfl_feature_info { > u16 fid; > + u8 rev; > struct resource mmio_res; > void __iomem *ioaddr; > struct list_head node; > @@ -796,6 +798,7 @@ static int build_info_commit_dev(struct build_feature_devs_info *binfo) > /* save resource information for each feature */ > feature->dev = fdev; > feature->id = finfo->fid; > + feature->revision = finfo->rev; > > /* > * the FIU header feature has some fundamental functions (sriov > @@ -910,19 +913,17 @@ static void build_info_free(struct build_feature_devs_info *binfo) > devm_kfree(binfo->dev, binfo); > } > > -static inline u32 feature_size(void __iomem *start) > +static inline u32 feature_size(u64 value) > { > - u64 v = readq(start + DFH); > - u32 ofst = FIELD_GET(DFH_NEXT_HDR_OFST, v); > + u32 ofst = FIELD_GET(DFH_NEXT_HDR_OFST, value); > /* workaround for private features with invalid size, use 4K instead */ > return ofst ? ofst : 4096; > } > > -static u16 feature_id(void __iomem *start) > +static u16 feature_id(u64 value) > { > - u64 v = readq(start + DFH); > - u16 id = FIELD_GET(DFH_ID, v); > - u8 type = FIELD_GET(DFH_TYPE, v); > + u16 id = FIELD_GET(DFH_ID, value); > + u8 type = FIELD_GET(DFH_TYPE, value); > > if (type == DFH_TYPE_FIU) > return FEATURE_ID_FIU_HEADER; > @@ -1021,10 +1022,15 @@ create_feature_instance(struct build_feature_devs_info *binfo, > unsigned int irq_base, nr_irqs; > struct dfl_feature_info *finfo; > int ret; > + u8 rev; > + u64 v; > + > + v = readq(binfo->ioaddr + ofst); > + rev = FIELD_GET(DFH_REVISION, v); > > /* read feature size and id if inputs are invalid */ > - size = size ? size : feature_size(binfo->ioaddr + ofst); > - fid = fid ? fid : feature_id(binfo->ioaddr + ofst); > + size = size ? size : feature_size(v); > + fid = fid ? fid : feature_id(v); > > if (binfo->len - ofst < size) > return -EINVAL; > @@ -1038,6 +1044,7 @@ create_feature_instance(struct build_feature_devs_info *binfo, > return -ENOMEM; > > finfo->fid = fid; > + finfo->rev = rev; > finfo->mmio_res.start = binfo->start + ofst; > finfo->mmio_res.end = finfo->mmio_res.start + size - 1; > finfo->mmio_res.flags = IORESOURCE_MEM; > @@ -1166,7 +1173,7 @@ static int parse_feature_private(struct build_feature_devs_info *binfo, > { > if (!is_feature_dev_detected(binfo)) { > dev_err(binfo->dev, "the private feature 0x%x does not belong to any AFU.\n", > - feature_id(binfo->ioaddr + ofst)); > + feature_id(readq(binfo->ioaddr + ofst))); > return -EINVAL; > } > > diff --git a/drivers/fpga/dfl.h b/drivers/fpga/dfl.h > index 2b82c96ba56c..422157cfd742 100644 > --- a/drivers/fpga/dfl.h > +++ b/drivers/fpga/dfl.h > @@ -243,6 +243,7 @@ struct dfl_feature_irq_ctx { > struct dfl_feature { > struct platform_device *dev; > u16 id; > + u8 revision; > int resource_index; > void __iomem *ioaddr; > struct dfl_feature_irq_ctx *irq_ctx; > diff --git a/include/linux/dfl.h b/include/linux/dfl.h > index 6cc10982351a..431636a0dc78 100644 > --- a/include/linux/dfl.h > +++ b/include/linux/dfl.h > @@ -38,6 +38,7 @@ struct dfl_device { > int id; > u16 type; > u16 feature_id; > + u8 revision; > struct resource mmio_res; > int *irqs; > unsigned int num_irqs; > -- > 2.31.0 > >
diff --git a/drivers/fpga/dfl.c b/drivers/fpga/dfl.c index 511b20ff35a3..9381c579d1cd 100644 --- a/drivers/fpga/dfl.c +++ b/drivers/fpga/dfl.c @@ -381,6 +381,7 @@ dfl_dev_add(struct dfl_feature_platform_data *pdata, ddev->type = feature_dev_id_type(pdev); ddev->feature_id = feature->id; + ddev->revision = feature->revision; ddev->cdev = pdata->dfl_cdev; /* add mmio resource */ @@ -717,6 +718,7 @@ struct build_feature_devs_info { */ struct dfl_feature_info { u16 fid; + u8 rev; struct resource mmio_res; void __iomem *ioaddr; struct list_head node; @@ -796,6 +798,7 @@ static int build_info_commit_dev(struct build_feature_devs_info *binfo) /* save resource information for each feature */ feature->dev = fdev; feature->id = finfo->fid; + feature->revision = finfo->rev; /* * the FIU header feature has some fundamental functions (sriov @@ -910,19 +913,17 @@ static void build_info_free(struct build_feature_devs_info *binfo) devm_kfree(binfo->dev, binfo); } -static inline u32 feature_size(void __iomem *start) +static inline u32 feature_size(u64 value) { - u64 v = readq(start + DFH); - u32 ofst = FIELD_GET(DFH_NEXT_HDR_OFST, v); + u32 ofst = FIELD_GET(DFH_NEXT_HDR_OFST, value); /* workaround for private features with invalid size, use 4K instead */ return ofst ? ofst : 4096; } -static u16 feature_id(void __iomem *start) +static u16 feature_id(u64 value) { - u64 v = readq(start + DFH); - u16 id = FIELD_GET(DFH_ID, v); - u8 type = FIELD_GET(DFH_TYPE, v); + u16 id = FIELD_GET(DFH_ID, value); + u8 type = FIELD_GET(DFH_TYPE, value); if (type == DFH_TYPE_FIU) return FEATURE_ID_FIU_HEADER; @@ -1021,10 +1022,15 @@ create_feature_instance(struct build_feature_devs_info *binfo, unsigned int irq_base, nr_irqs; struct dfl_feature_info *finfo; int ret; + u8 rev; + u64 v; + + v = readq(binfo->ioaddr + ofst); + rev = FIELD_GET(DFH_REVISION, v); /* read feature size and id if inputs are invalid */ - size = size ? size : feature_size(binfo->ioaddr + ofst); - fid = fid ? fid : feature_id(binfo->ioaddr + ofst); + size = size ? size : feature_size(v); + fid = fid ? fid : feature_id(v); if (binfo->len - ofst < size) return -EINVAL; @@ -1038,6 +1044,7 @@ create_feature_instance(struct build_feature_devs_info *binfo, return -ENOMEM; finfo->fid = fid; + finfo->rev = rev; finfo->mmio_res.start = binfo->start + ofst; finfo->mmio_res.end = finfo->mmio_res.start + size - 1; finfo->mmio_res.flags = IORESOURCE_MEM; @@ -1166,7 +1173,7 @@ static int parse_feature_private(struct build_feature_devs_info *binfo, { if (!is_feature_dev_detected(binfo)) { dev_err(binfo->dev, "the private feature 0x%x does not belong to any AFU.\n", - feature_id(binfo->ioaddr + ofst)); + feature_id(readq(binfo->ioaddr + ofst))); return -EINVAL; } diff --git a/drivers/fpga/dfl.h b/drivers/fpga/dfl.h index 2b82c96ba56c..422157cfd742 100644 --- a/drivers/fpga/dfl.h +++ b/drivers/fpga/dfl.h @@ -243,6 +243,7 @@ struct dfl_feature_irq_ctx { struct dfl_feature { struct platform_device *dev; u16 id; + u8 revision; int resource_index; void __iomem *ioaddr; struct dfl_feature_irq_ctx *irq_ctx; diff --git a/include/linux/dfl.h b/include/linux/dfl.h index 6cc10982351a..431636a0dc78 100644 --- a/include/linux/dfl.h +++ b/include/linux/dfl.h @@ -38,6 +38,7 @@ struct dfl_device { int id; u16 type; u16 feature_id; + u8 revision; struct resource mmio_res; int *irqs; unsigned int num_irqs;