The structure exists to pass around information about register mapping. Using it more extensively cleans up many existing functions.
Signed-off-by: Ben Widawsky <ben.widaw...@intel.com> --- drivers/cxl/cxl.h | 1 + drivers/cxl/pci.c | 36 +++++++++++++++++------------------- 2 files changed, 18 insertions(+), 19 deletions(-) diff --git a/drivers/cxl/cxl.h b/drivers/cxl/cxl.h index 7d6b011dd963..3b128ce71564 100644 --- a/drivers/cxl/cxl.h +++ b/drivers/cxl/cxl.h @@ -140,6 +140,7 @@ struct cxl_device_reg_map { }; struct cxl_register_map { + void __iomem *base; u64 block_offset; u8 reg_type; u8 barno; diff --git a/drivers/cxl/pci.c b/drivers/cxl/pci.c index bbbacbc94fbf..5eaf2736f779 100644 --- a/drivers/cxl/pci.c +++ b/drivers/cxl/pci.c @@ -306,35 +306,36 @@ static int cxl_pci_setup_mailbox(struct cxl_mem *cxlm) return 0; } -static void __iomem *cxl_pci_map_regblock(struct cxl_mem *cxlm, - u8 bar, u64 offset) +static int cxl_pci_map_regblock(struct cxl_mem *cxlm, struct cxl_register_map *map) { - void __iomem *addr; + int bar = map->barno; struct device *dev = cxlm->dev; struct pci_dev *pdev = to_pci_dev(dev); + resource_size_t offset = map->block_offset; /* Basic sanity check that BAR is big enough */ if (pci_resource_len(pdev, bar) < offset) { dev_err(dev, "BAR%d: %pr: too small (offset: %#llx)\n", bar, &pdev->resource[bar], (unsigned long long)offset); - return IOMEM_ERR_PTR(-ENXIO); + return -ENXIO; } - addr = pci_iomap(pdev, bar, 0); - if (!addr) { + map->base = pci_iomap(pdev, bar, 0); + if (!map->base) { dev_err(dev, "failed to map registers\n"); - return addr; + return PTR_ERR(map->base); } dev_dbg(dev, "Mapped CXL Memory Device resource bar %u @ %#llx\n", bar, offset); - return addr; + return 0; } -static void cxl_pci_unmap_regblock(struct cxl_mem *cxlm, void __iomem *base) +static void cxl_pci_unmap_regblock(struct cxl_mem *cxlm, struct cxl_register_map *map) { - pci_iounmap(to_pci_dev(cxlm->dev), base); + pci_iounmap(to_pci_dev(cxlm->dev), map->base); + map->base = 0; } static int cxl_pci_dvsec(struct pci_dev *pdev, int dvsec) @@ -360,9 +361,9 @@ static int cxl_pci_dvsec(struct pci_dev *pdev, int dvsec) return 0; } -static int cxl_probe_regs(struct cxl_mem *cxlm, void __iomem *base, - struct cxl_register_map *map) +static int cxl_probe_regs(struct cxl_mem *cxlm, struct cxl_register_map *map) { + void __iomem *base = map->base + map->block_offset; struct cxl_component_reg_map *comp_map; struct cxl_device_reg_map *dev_map; struct device *dev = cxlm->dev; @@ -487,7 +488,6 @@ static int cxl_pci_setup_regs(struct cxl_mem *cxlm) for (i = 0; i < ARRAY_SIZE(types); i++) { struct cxl_register_map map; - void __iomem *base; rc = find_register_block(pdev, types[i], &map); if (rc) { @@ -498,14 +498,12 @@ static int cxl_pci_setup_regs(struct cxl_mem *cxlm) break; } - base = cxl_pci_map_regblock(cxlm, map.barno, map.block_offset); - if (!base) { - rc = -ENOMEM; + rc = cxl_pci_map_regblock(cxlm, &map); + if (rc) break; - } - rc = cxl_probe_regs(cxlm, base + map.block_offset, &map); - cxl_pci_unmap_regblock(cxlm, base); + rc = cxl_probe_regs(cxlm, &map); + cxl_pci_unmap_regblock(cxlm, &map); if (rc) break; -- 2.33.0 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu