From 5f1895e0e381f04ef759cd33636d861b0fdcb3d1 Mon Sep 17 00:00:00 2001 From: Colin Ian King Date: Wed, 28 Jul 2021 22:51:50 +0100 Subject: fpga: Fix spelling mistake "eXchnage" -> "exchange" in Kconfig There is a spelling mistake in the Kconfig text. Fix it. Reviewed-by: Tom Rix Signed-off-by: Colin Ian King Signed-off-by: Moritz Fischer --- drivers/fpga/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/fpga') diff --git a/drivers/fpga/Kconfig b/drivers/fpga/Kconfig index 8cd454ee20c0..3a33990e44fc 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. -- cgit v1.2.3-70-g09d2 From 1604986c3e6bd84f3f3fd709c1a619c6fc9d79a9 Mon Sep 17 00:00:00 2001 From: Martin Hundebøll Date: Fri, 16 Jul 2021 15:54:39 +0200 Subject: fpga: dfl: expose feature revision from struct dfl_device MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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. Acked-by: Wu Hao Acked-by: Matthew Gerlach Signed-off-by: Martin Hundebøll Signed-off-by: Moritz Fischer --- drivers/fpga/dfl.c | 27 +++++++++++++++++---------- drivers/fpga/dfl.h | 1 + include/linux/dfl.h | 1 + 3 files changed, 19 insertions(+), 10 deletions(-) (limited to 'drivers/fpga') 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; 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; -- cgit v1.2.3-70-g09d2