diff options
Diffstat (limited to 'drivers/fpga')
| -rw-r--r-- | drivers/fpga/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/fpga/dfl.c | 27 | ||||
| -rw-r--r-- | drivers/fpga/dfl.h | 1 |
3 files changed, 19 insertions, 11 deletions
diff --git a/drivers/fpga/Kconfig b/drivers/fpga/Kconfig index 16793bfc2bb4..991b3f361ec9 100644 --- a/drivers/fpga/Kconfig +++ b/drivers/fpga/Kconfig @@ -119,7 +119,7 @@ config XILINX_PR_DECOUPLER depends on HAS_IOMEM help Say Y to enable drivers for Xilinx LogiCORE PR Decoupler - or Xilinx Dynamic Function eXchnage AIX Shutdown Manager. + or Xilinx Dynamic Function eXchange AIX Shutdown Manager. The PR Decoupler exists in the FPGA fabric to isolate one region of the FPGA from the busses while that region is being reprogrammed during partial reconfig. diff --git a/drivers/fpga/dfl.c b/drivers/fpga/dfl.c index 511b20ff35a3..e73a70053906 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 revision; 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->revision; /* * 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 revision; + u64 v; + + v = readq(binfo->ioaddr + ofst); + revision = 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->revision = revision; 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 dac9c3d45e6c..53572c7aced0 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; |