diff options
Diffstat (limited to 'drivers/fpga')
| -rw-r--r-- | drivers/fpga/dfl-pci.c | 24 | ||||
| -rw-r--r-- | drivers/fpga/dfl.c | 187 | ||||
| -rw-r--r-- | drivers/fpga/dfl.h | 7 |
3 files changed, 141 insertions, 77 deletions
diff --git a/drivers/fpga/dfl-pci.c b/drivers/fpga/dfl-pci.c index e220bec2927d..a2203d03c9e2 100644 --- a/drivers/fpga/dfl-pci.c +++ b/drivers/fpga/dfl-pci.c @@ -31,12 +31,12 @@ struct cci_drvdata { struct dfl_fpga_cdev *cdev; /* container device */ }; -static void __iomem *cci_pci_ioremap_bar(struct pci_dev *pcidev, int bar) +static void __iomem *cci_pci_ioremap_bar0(struct pci_dev *pcidev) { - if (pcim_iomap_regions(pcidev, BIT(bar), DRV_NAME)) + if (pcim_iomap_regions(pcidev, BIT(0), DRV_NAME)) return NULL; - return pcim_iomap_table(pcidev)[bar]; + return pcim_iomap_table(pcidev)[0]; } static int cci_pci_alloc_irq(struct pci_dev *pcidev) @@ -156,8 +156,8 @@ static int cci_enumerate_feature_devs(struct pci_dev *pcidev) goto irq_free_exit; } - /* start to find Device Feature List from Bar 0 */ - base = cci_pci_ioremap_bar(pcidev, 0); + /* start to find Device Feature List in Bar 0 */ + base = cci_pci_ioremap_bar0(pcidev); if (!base) { ret = -ENOMEM; goto irq_free_exit; @@ -172,7 +172,7 @@ static int cci_enumerate_feature_devs(struct pci_dev *pcidev) start = pci_resource_start(pcidev, 0); len = pci_resource_len(pcidev, 0); - dfl_fpga_enum_info_add_dfl(info, start, len, base); + dfl_fpga_enum_info_add_dfl(info, start, len); /* * find more Device Feature Lists (e.g. Ports) per information @@ -196,26 +196,24 @@ static int cci_enumerate_feature_devs(struct pci_dev *pcidev) */ bar = FIELD_GET(FME_PORT_OFST_BAR_ID, v); offset = FIELD_GET(FME_PORT_OFST_DFH_OFST, v); - base = cci_pci_ioremap_bar(pcidev, bar); - if (!base) - continue; - start = pci_resource_start(pcidev, bar) + offset; len = pci_resource_len(pcidev, bar) - offset; - dfl_fpga_enum_info_add_dfl(info, start, len, - base + offset); + dfl_fpga_enum_info_add_dfl(info, start, len); } } else if (dfl_feature_is_port(base)) { start = pci_resource_start(pcidev, 0); len = pci_resource_len(pcidev, 0); - dfl_fpga_enum_info_add_dfl(info, start, len, base); + dfl_fpga_enum_info_add_dfl(info, start, len); } else { ret = -ENODEV; goto irq_free_exit; } + /* release I/O mappings for next step enumeration */ + pcim_iounmap_regions(pcidev, BIT(0)); + /* start enumeration with prepared enumeration information */ cdev = dfl_fpga_feature_devs_enumerate(info); if (IS_ERR(cdev)) { diff --git a/drivers/fpga/dfl.c b/drivers/fpga/dfl.c index 18575d95dbcc..52cafa22c127 100644 --- a/drivers/fpga/dfl.c +++ b/drivers/fpga/dfl.c @@ -250,6 +250,8 @@ int dfl_fpga_check_port_id(struct platform_device *pdev, void *pport_id) } EXPORT_SYMBOL_GPL(dfl_fpga_check_port_id); +#define is_header_feature(feature) ((feature)->id == FEATURE_ID_FIU_HEADER) + /** * dfl_fpga_dev_feature_uinit - uinit for sub features of dfl feature device * @pdev: feature device. @@ -273,8 +275,22 @@ static int dfl_feature_instance_init(struct platform_device *pdev, struct dfl_feature *feature, struct dfl_feature_driver *drv) { + void __iomem *base; int ret = 0; + if (!is_header_feature(feature)) { + base = devm_platform_ioremap_resource(pdev, + feature->resource_index); + if (IS_ERR(base)) { + dev_err(&pdev->dev, + "ioremap failed for feature 0x%x!\n", + feature->id); + return PTR_ERR(base); + } + + feature->ioaddr = base; + } + if (drv->ops->init) { ret = drv->ops->init(pdev, feature); if (ret) @@ -427,7 +443,9 @@ EXPORT_SYMBOL_GPL(dfl_fpga_dev_ops_unregister); * @irq_table: Linux IRQ numbers for all irqs, indexed by local irq index of * this device. * @feature_dev: current feature device. - * @ioaddr: header register region address of feature device in enumeration. + * @ioaddr: header register region address of current FIU in enumeration. + * @start: register resource start of current FIU. + * @len: max register resource length of current FIU. * @sub_features: a sub features linked list for feature device in enumeration. * @feature_num: number of sub features for feature device in enumeration. */ @@ -439,6 +457,8 @@ struct build_feature_devs_info { struct platform_device *feature_dev; void __iomem *ioaddr; + resource_size_t start; + resource_size_t len; struct list_head sub_features; int feature_num; }; @@ -484,10 +504,7 @@ static int build_info_commit_dev(struct build_feature_devs_info *binfo) struct dfl_feature_platform_data *pdata; struct dfl_feature_info *finfo, *p; enum dfl_id_type type; - int ret, index = 0; - - if (!fdev) - return 0; + int ret, index = 0, res_idx = 0; type = feature_dev_id_type(fdev); if (WARN_ON_ONCE(type >= DFL_ID_MAX)) @@ -530,16 +547,32 @@ static int build_info_commit_dev(struct build_feature_devs_info *binfo) /* fill features and resource information for feature dev */ list_for_each_entry_safe(finfo, p, &binfo->sub_features, node) { - struct dfl_feature *feature = &pdata->features[index]; + struct dfl_feature *feature = &pdata->features[index++]; struct dfl_feature_irq_ctx *ctx; unsigned int i; /* save resource information for each feature */ feature->dev = fdev; feature->id = finfo->fid; - feature->resource_index = index; - feature->ioaddr = finfo->ioaddr; - fdev->resource[index++] = finfo->mmio_res; + + /* + * the FIU header feature has some fundamental functions (sriov + * set, port enable/disable) needed for the dfl bus device and + * other sub features. So its mmio resource should be mapped by + * DFL bus device. And we should not assign it to feature + * devices (dfl-fme/afu) again. + */ + if (is_header_feature(feature)) { + feature->resource_index = -1; + feature->ioaddr = + devm_ioremap_resource(binfo->dev, + &finfo->mmio_res); + if (IS_ERR(feature->ioaddr)) + return PTR_ERR(feature->ioaddr); + } else { + feature->resource_index = res_idx; + fdev->resource[res_idx++] = finfo->mmio_res; + } if (finfo->nr_irqs) { ctx = devm_kcalloc(binfo->dev, finfo->nr_irqs, @@ -582,19 +615,13 @@ static int build_info_commit_dev(struct build_feature_devs_info *binfo) static int build_info_create_dev(struct build_feature_devs_info *binfo, - enum dfl_id_type type, void __iomem *ioaddr) + enum dfl_id_type type) { struct platform_device *fdev; - int ret; if (type >= DFL_ID_MAX) return -EINVAL; - /* we will create a new device, commit current device first */ - ret = build_info_commit_dev(binfo); - if (ret) - return ret; - /* * we use -ENODEV as the initialization indicator which indicates * whether the id need to be reclaimed @@ -605,7 +632,7 @@ build_info_create_dev(struct build_feature_devs_info *binfo, binfo->feature_dev = fdev; binfo->feature_num = 0; - binfo->ioaddr = ioaddr; + INIT_LIST_HEAD(&binfo->sub_features); fdev->id = dfl_id_alloc(type, &fdev->dev); @@ -747,18 +774,17 @@ static int parse_feature_irqs(struct build_feature_devs_info *binfo, */ static int create_feature_instance(struct build_feature_devs_info *binfo, - struct dfl_fpga_enum_dfl *dfl, resource_size_t ofst, - resource_size_t size, u16 fid) + resource_size_t ofst, resource_size_t size, u16 fid) { unsigned int irq_base, nr_irqs; struct dfl_feature_info *finfo; int ret; /* read feature size and id if inputs are invalid */ - size = size ? size : feature_size(dfl->ioaddr + ofst); - fid = fid ? fid : feature_id(dfl->ioaddr + ofst); + size = size ? size : feature_size(binfo->ioaddr + ofst); + fid = fid ? fid : feature_id(binfo->ioaddr + ofst); - if (dfl->len - ofst < size) + if (binfo->len - ofst < size) return -EINVAL; ret = parse_feature_irqs(binfo, ofst, fid, &irq_base, &nr_irqs); @@ -770,12 +796,11 @@ create_feature_instance(struct build_feature_devs_info *binfo, return -ENOMEM; finfo->fid = fid; - finfo->mmio_res.start = dfl->start + ofst; + finfo->mmio_res.start = binfo->start + ofst; finfo->mmio_res.end = finfo->mmio_res.start + size - 1; finfo->mmio_res.flags = IORESOURCE_MEM; finfo->irq_base = irq_base; finfo->nr_irqs = nr_irqs; - finfo->ioaddr = dfl->ioaddr + ofst; list_add_tail(&finfo->node, &binfo->sub_features); binfo->feature_num++; @@ -784,7 +809,6 @@ create_feature_instance(struct build_feature_devs_info *binfo, } static int parse_feature_port_afu(struct build_feature_devs_info *binfo, - struct dfl_fpga_enum_dfl *dfl, resource_size_t ofst) { u64 v = readq(binfo->ioaddr + PORT_HDR_CAP); @@ -792,21 +816,22 @@ static int parse_feature_port_afu(struct build_feature_devs_info *binfo, WARN_ON(!size); - return create_feature_instance(binfo, dfl, ofst, size, FEATURE_ID_AFU); + return create_feature_instance(binfo, ofst, size, FEATURE_ID_AFU); } +#define is_feature_dev_detected(binfo) (!!(binfo)->feature_dev) + static int parse_feature_afu(struct build_feature_devs_info *binfo, - struct dfl_fpga_enum_dfl *dfl, resource_size_t ofst) { - if (!binfo->feature_dev) { + if (!is_feature_dev_detected(binfo)) { dev_err(binfo->dev, "this AFU does not belong to any FIU.\n"); return -EINVAL; } switch (feature_dev_id_type(binfo->feature_dev)) { case PORT_ID: - return parse_feature_port_afu(binfo, dfl, ofst); + return parse_feature_port_afu(binfo, ofst); default: dev_info(binfo->dev, "AFU belonging to FIU %s is not supported yet.\n", binfo->feature_dev->name); @@ -815,8 +840,39 @@ static int parse_feature_afu(struct build_feature_devs_info *binfo, return 0; } +static int build_info_prepare(struct build_feature_devs_info *binfo, + resource_size_t start, resource_size_t len) +{ + struct device *dev = binfo->dev; + void __iomem *ioaddr; + + if (!devm_request_mem_region(dev, start, len, dev_name(dev))) { + dev_err(dev, "request region fail, start:%pa, len:%pa\n", + &start, &len); + return -EBUSY; + } + + ioaddr = devm_ioremap(dev, start, len); + if (!ioaddr) { + dev_err(dev, "ioremap region fail, start:%pa, len:%pa\n", + &start, &len); + return -ENOMEM; + } + + binfo->start = start; + binfo->len = len; + binfo->ioaddr = ioaddr; + + return 0; +} + +static void build_info_complete(struct build_feature_devs_info *binfo) +{ + devm_iounmap(binfo->dev, binfo->ioaddr); + devm_release_mem_region(binfo->dev, binfo->start, binfo->len); +} + static int parse_feature_fiu(struct build_feature_devs_info *binfo, - struct dfl_fpga_enum_dfl *dfl, resource_size_t ofst) { int ret = 0; @@ -824,27 +880,39 @@ static int parse_feature_fiu(struct build_feature_devs_info *binfo, u16 id; u64 v; - v = readq(dfl->ioaddr + ofst + DFH); + if (is_feature_dev_detected(binfo)) { + build_info_complete(binfo); + + ret = build_info_commit_dev(binfo); + if (ret) + return ret; + + ret = build_info_prepare(binfo, binfo->start + ofst, + binfo->len - ofst); + if (ret) + return ret; + } + + v = readq(binfo->ioaddr + DFH); id = FIELD_GET(DFH_ID, v); /* create platform device for dfl feature dev */ - ret = build_info_create_dev(binfo, dfh_id_to_type(id), - dfl->ioaddr + ofst); + ret = build_info_create_dev(binfo, dfh_id_to_type(id)); if (ret) return ret; - ret = create_feature_instance(binfo, dfl, ofst, 0, 0); + ret = create_feature_instance(binfo, 0, 0, 0); if (ret) return ret; /* * find and parse FIU's child AFU via its NEXT_AFU register. * please note that only Port has valid NEXT_AFU pointer per spec. */ - v = readq(dfl->ioaddr + ofst + NEXT_AFU); + v = readq(binfo->ioaddr + NEXT_AFU); offset = FIELD_GET(NEXT_AFU_NEXT_DFH_OFST, v); if (offset) - return parse_feature_afu(binfo, dfl, ofst + offset); + return parse_feature_afu(binfo, offset); dev_dbg(binfo->dev, "No AFUs detected on FIU %d\n", id); @@ -852,41 +920,39 @@ static int parse_feature_fiu(struct build_feature_devs_info *binfo, } static int parse_feature_private(struct build_feature_devs_info *binfo, - struct dfl_fpga_enum_dfl *dfl, resource_size_t ofst) { - if (!binfo->feature_dev) { + if (!is_feature_dev_detected(binfo)) { dev_err(binfo->dev, "the private feature 0x%x does not belong to any AFU.\n", - feature_id(dfl->ioaddr + ofst)); + feature_id(binfo->ioaddr + ofst)); return -EINVAL; } - return create_feature_instance(binfo, dfl, ofst, 0, 0); + return create_feature_instance(binfo, ofst, 0, 0); } /** * parse_feature - parse a feature on given device feature list * * @binfo: build feature devices information. - * @dfl: device feature list to parse - * @ofst: offset to feature header on this device feature list + * @ofst: offset to current FIU header */ static int parse_feature(struct build_feature_devs_info *binfo, - struct dfl_fpga_enum_dfl *dfl, resource_size_t ofst) + resource_size_t ofst) { u64 v; u32 type; - v = readq(dfl->ioaddr + ofst + DFH); + v = readq(binfo->ioaddr + ofst + DFH); type = FIELD_GET(DFH_TYPE, v); switch (type) { case DFH_TYPE_AFU: - return parse_feature_afu(binfo, dfl, ofst); + return parse_feature_afu(binfo, ofst); case DFH_TYPE_PRIVATE: - return parse_feature_private(binfo, dfl, ofst); + return parse_feature_private(binfo, ofst); case DFH_TYPE_FIU: - return parse_feature_fiu(binfo, dfl, ofst); + return parse_feature_fiu(binfo, ofst); default: dev_info(binfo->dev, "Feature Type %x is not supported.\n", type); @@ -896,14 +962,17 @@ static int parse_feature(struct build_feature_devs_info *binfo, } static int parse_feature_list(struct build_feature_devs_info *binfo, - struct dfl_fpga_enum_dfl *dfl) + resource_size_t start, resource_size_t len) { - void __iomem *start = dfl->ioaddr; - void __iomem *end = dfl->ioaddr + dfl->len; + resource_size_t end = start + len; int ret = 0; u32 ofst = 0; u64 v; + ret = build_info_prepare(binfo, start, len); + if (ret) + return ret; + /* walk through the device feature list via DFH's next DFH pointer. */ for (; start < end; start += ofst) { if (end - start < DFH_SIZE) { @@ -911,11 +980,11 @@ static int parse_feature_list(struct build_feature_devs_info *binfo, return -EINVAL; } - ret = parse_feature(binfo, dfl, start - dfl->ioaddr); + ret = parse_feature(binfo, start - binfo->start); if (ret) return ret; - v = readq(start + DFH); + v = readq(binfo->ioaddr + start - binfo->start + DFH); ofst = FIELD_GET(DFH_NEXT_HDR_OFST, v); /* stop parsing if EOL(End of List) is set or offset is 0 */ @@ -924,7 +993,12 @@ static int parse_feature_list(struct build_feature_devs_info *binfo, } /* commit current feature device when reach the end of list */ - return build_info_commit_dev(binfo); + build_info_complete(binfo); + + if (is_feature_dev_detected(binfo)) + ret = build_info_commit_dev(binfo); + + return ret; } struct dfl_fpga_enum_info *dfl_fpga_enum_info_alloc(struct device *dev) @@ -977,7 +1051,6 @@ EXPORT_SYMBOL_GPL(dfl_fpga_enum_info_free); * @info: ptr to dfl_fpga_enum_info * @start: mmio resource address of the device feature list. * @len: mmio resource length of the device feature list. - * @ioaddr: mapped mmio resource address of the device feature list. * * One FPGA device may have one or more Device Feature Lists (DFLs), use this * function to add information of each DFL to common data structure for next @@ -986,8 +1059,7 @@ EXPORT_SYMBOL_GPL(dfl_fpga_enum_info_free); * Return: 0 on success, negative error code otherwise. */ int dfl_fpga_enum_info_add_dfl(struct dfl_fpga_enum_info *info, - resource_size_t start, resource_size_t len, - void __iomem *ioaddr) + resource_size_t start, resource_size_t len) { struct dfl_fpga_enum_dfl *dfl; @@ -997,7 +1069,6 @@ int dfl_fpga_enum_info_add_dfl(struct dfl_fpga_enum_info *info, dfl->start = start; dfl->len = len; - dfl->ioaddr = ioaddr; list_add_tail(&dfl->node, &info->dfls); @@ -1120,7 +1191,7 @@ dfl_fpga_feature_devs_enumerate(struct dfl_fpga_enum_info *info) * Lists. */ list_for_each_entry(dfl, &info->dfls, node) { - ret = parse_feature_list(binfo, dfl); + ret = parse_feature_list(binfo, dfl->start, dfl->len); if (ret) { remove_feature_devs(cdev); build_info_free(binfo); diff --git a/drivers/fpga/dfl.h b/drivers/fpga/dfl.h index bc619426a3b7..5973769430a7 100644 --- a/drivers/fpga/dfl.h +++ b/drivers/fpga/dfl.h @@ -441,22 +441,17 @@ struct dfl_fpga_enum_info { * * @start: base address of this device feature list. * @len: size of this device feature list. - * @ioaddr: mapped base address of this device feature list. * @node: node in list of device feature lists. */ struct dfl_fpga_enum_dfl { resource_size_t start; resource_size_t len; - - void __iomem *ioaddr; - struct list_head node; }; struct dfl_fpga_enum_info *dfl_fpga_enum_info_alloc(struct device *dev); int dfl_fpga_enum_info_add_dfl(struct dfl_fpga_enum_info *info, - resource_size_t start, resource_size_t len, - void __iomem *ioaddr); + resource_size_t start, resource_size_t len); int dfl_fpga_enum_info_add_irq(struct dfl_fpga_enum_info *info, unsigned int nr_irqs, int *irq_table); void dfl_fpga_enum_info_free(struct dfl_fpga_enum_info *info); |