From 573408049b7598a7c4ef6981b70b1275447d28e4 Mon Sep 17 00:00:00 2001 From: Robert Richter Date: Thu, 22 Jun 2023 15:55:02 -0500 Subject: [PATCH] cxl/core/regs: Add @dev to cxl_register_map The corresponding device of a register mapping is used for devm operations and logging. For operations with struct cxl_register_map the device needs to be kept track separately. To simpify the involved function interfaces, add @dev to cxl_register_map. While at it also reorder function arguments of cxl_map_device_regs() and cxl_map_component_regs() to have the object @cxl_register_map first. As a result a bunch of functions are available to be used with a @cxl_register_map object. This patch is in preparation of reworking the component register setup code. Signed-off-by: Robert Richter Signed-off-by: Terry Bowman Reviewed-by: Jonathan Cameron Link: https://lore.kernel.org/r/20230622205523.85375-7-terry.bowman@amd.com Signed-off-by: Dan Williams --- drivers/cxl/core/hdm.c | 4 ++-- drivers/cxl/core/regs.c | 18 ++++++++++++------ drivers/cxl/cxl.h | 10 ++++++---- drivers/cxl/pci.c | 23 +++++++++++------------ 4 files changed, 31 insertions(+), 24 deletions(-) diff --git a/drivers/cxl/core/hdm.c b/drivers/cxl/core/hdm.c index 7889ff203a34..5abfa9276dac 100644 --- a/drivers/cxl/core/hdm.c +++ b/drivers/cxl/core/hdm.c @@ -85,6 +85,7 @@ static int map_hdm_decoder_regs(struct cxl_port *port, void __iomem *crb, struct cxl_component_regs *regs) { struct cxl_register_map map = { + .dev = &port->dev, .resource = port->component_reg_phys, .base = crb, .max_size = CXL_COMPONENT_REG_BLOCK_SIZE, @@ -97,8 +98,7 @@ static int map_hdm_decoder_regs(struct cxl_port *port, void __iomem *crb, return -ENODEV; } - return cxl_map_component_regs(&port->dev, regs, &map, - BIT(CXL_CM_CAP_CAP_ID_HDM)); + return cxl_map_component_regs(&map, regs, BIT(CXL_CM_CAP_CAP_ID_HDM)); } static bool should_emulate_decoders(struct cxl_endpoint_dvsec_info *info) diff --git a/drivers/cxl/core/regs.c b/drivers/cxl/core/regs.c index 6c4b33133918..713e4a9ca35a 100644 --- a/drivers/cxl/core/regs.c +++ b/drivers/cxl/core/regs.c @@ -199,9 +199,11 @@ void __iomem *devm_cxl_iomap_block(struct device *dev, resource_size_t addr, return ret_val; } -int cxl_map_component_regs(struct device *dev, struct cxl_component_regs *regs, - struct cxl_register_map *map, unsigned long map_mask) +int cxl_map_component_regs(struct cxl_register_map *map, + struct cxl_component_regs *regs, + unsigned long map_mask) { + struct device *dev = map->dev; struct mapinfo { struct cxl_reg_map *rmap; void __iomem **addr; @@ -231,10 +233,10 @@ int cxl_map_component_regs(struct device *dev, struct cxl_component_regs *regs, } EXPORT_SYMBOL_NS_GPL(cxl_map_component_regs, CXL); -int cxl_map_device_regs(struct device *dev, - struct cxl_device_regs *regs, - struct cxl_register_map *map) +int cxl_map_device_regs(struct cxl_register_map *map, + struct cxl_device_regs *regs) { + struct device *dev = map->dev; resource_size_t phys_addr = map->resource; struct mapinfo { struct cxl_reg_map *rmap; @@ -302,7 +304,11 @@ int cxl_find_regblock(struct pci_dev *pdev, enum cxl_regloc_type type, u32 regloc_size, regblocks; int regloc, i; - map->resource = CXL_RESOURCE_NONE; + *map = (struct cxl_register_map) { + .dev = &pdev->dev, + .resource = CXL_RESOURCE_NONE, + }; + regloc = pci_find_dvsec_capability(pdev, PCI_DVSEC_VENDOR_ID_CXL, CXL_DVSEC_REG_LOCATOR); if (!regloc) diff --git a/drivers/cxl/cxl.h b/drivers/cxl/cxl.h index 754cfe59ae37..bd68d5fabf21 100644 --- a/drivers/cxl/cxl.h +++ b/drivers/cxl/cxl.h @@ -231,6 +231,7 @@ struct cxl_device_reg_map { /** * struct cxl_register_map - DVSEC harvested register block mapping parameters + * @dev: device for devm operations and logging * @base: virtual base of the register-block-BAR + @block_offset * @resource: physical resource base of the register block * @max_size: maximum mapping size to perform register search @@ -239,6 +240,7 @@ struct cxl_device_reg_map { * @device_map: cxl_reg_maps for device registers */ struct cxl_register_map { + struct device *dev; void __iomem *base; resource_size_t resource; resource_size_t max_size; @@ -253,11 +255,11 @@ void cxl_probe_component_regs(struct device *dev, void __iomem *base, struct cxl_component_reg_map *map); void cxl_probe_device_regs(struct device *dev, void __iomem *base, struct cxl_device_reg_map *map); -int cxl_map_component_regs(struct device *dev, struct cxl_component_regs *regs, - struct cxl_register_map *map, +int cxl_map_component_regs(struct cxl_register_map *map, + struct cxl_component_regs *regs, unsigned long map_mask); -int cxl_map_device_regs(struct device *dev, struct cxl_device_regs *regs, - struct cxl_register_map *map); +int cxl_map_device_regs(struct cxl_register_map *map, + struct cxl_device_regs *regs); enum cxl_regloc_type; int cxl_find_regblock(struct pci_dev *pdev, enum cxl_regloc_type type, diff --git a/drivers/cxl/pci.c b/drivers/cxl/pci.c index 0872f2233ed0..0a89b96e6a8d 100644 --- a/drivers/cxl/pci.c +++ b/drivers/cxl/pci.c @@ -274,9 +274,9 @@ static int cxl_pci_setup_mailbox(struct cxl_dev_state *cxlds) return 0; } -static int cxl_map_regblock(struct pci_dev *pdev, struct cxl_register_map *map) +static int cxl_map_regblock(struct cxl_register_map *map) { - struct device *dev = &pdev->dev; + struct device *dev = map->dev; map->base = ioremap(map->resource, map->max_size); if (!map->base) { @@ -288,18 +288,17 @@ static int cxl_map_regblock(struct pci_dev *pdev, struct cxl_register_map *map) return 0; } -static void cxl_unmap_regblock(struct pci_dev *pdev, - struct cxl_register_map *map) +static void cxl_unmap_regblock(struct cxl_register_map *map) { iounmap(map->base); map->base = NULL; } -static int cxl_probe_regs(struct pci_dev *pdev, struct cxl_register_map *map) +static int cxl_probe_regs(struct cxl_register_map *map) { struct cxl_component_reg_map *comp_map; struct cxl_device_reg_map *dev_map; - struct device *dev = &pdev->dev; + struct device *dev = map->dev; void __iomem *base = map->base; switch (map->reg_type) { @@ -346,12 +345,12 @@ static int cxl_setup_regs(struct pci_dev *pdev, enum cxl_regloc_type type, if (rc) return rc; - rc = cxl_map_regblock(pdev, map); + rc = cxl_map_regblock(map); if (rc) return rc; - rc = cxl_probe_regs(pdev, map); - cxl_unmap_regblock(pdev, map); + rc = cxl_probe_regs(map); + cxl_unmap_regblock(map); return rc; } @@ -688,7 +687,7 @@ static int cxl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) if (rc) return rc; - rc = cxl_map_device_regs(&pdev->dev, &cxlds->regs.device_regs, &map); + rc = cxl_map_device_regs(&map, &cxlds->regs.device_regs); if (rc) return rc; @@ -703,8 +702,8 @@ static int cxl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) cxlds->component_reg_phys = map.resource; - rc = cxl_map_component_regs(&pdev->dev, &cxlds->regs.component, - &map, BIT(CXL_CM_CAP_CAP_ID_RAS)); + rc = cxl_map_component_regs(&map, &cxlds->regs.component, + BIT(CXL_CM_CAP_CAP_ID_RAS)); if (rc) dev_dbg(&pdev->dev, "Failed to map RAS capability.\n");