1 // SPDX-License-Identifier: GPL-2.0
3  * arch/alpha/kernel/pci-sysfs.c
10  * drivers/pci/pci-sysfs.c
25 		base = sparse ? hose->sparse_mem_base : hose->dense_mem_base;  in hose_mmap_page_range()
27 		base = sparse ? hose->sparse_io_base : hose->dense_io_base;  in hose_mmap_page_range()
29 	vma->vm_pgoff += base >> PAGE_SHIFT;  in hose_mmap_page_range()
31 	return io_remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,  in hose_mmap_page_range()
32 				  vma->vm_end - vma->vm_start,  in hose_mmap_page_range()
33 				  vma->vm_page_prot);  in hose_mmap_page_range()
36 static int __pci_mmap_fits(struct pci_dev *pdev, int num,  in __pci_mmap_fits()  argument
43 	start = vma->vm_pgoff;  in __pci_mmap_fits()
44 	size = ((pci_resource_len(pdev, num) - 1) >> (PAGE_SHIFT - shift)) + 1;  in __pci_mmap_fits()
46 	if (start < size && size - start >= nr)  in __pci_mmap_fits()
48 	WARN(1, "process \"%s\" tried to map%s 0x%08lx-0x%08lx on %s BAR %d "  in __pci_mmap_fits()
50 		current->comm, sparse ? " sparse" : "", start, start + nr,  in __pci_mmap_fits()
51 		pci_name(pdev), num, size);  in __pci_mmap_fits()
56  * pci_mmap_resource - map a PCI resource into user memory space
62  * Use the bus mapping routines to map a PCI resource into userspace.
71 	struct resource *res = attr->private;  in pci_mmap_resource()
77 		if (res == &pdev->resource[i])  in pci_mmap_resource()
80 		return -ENODEV;  in pci_mmap_resource()
82 	if (res->flags & IORESOURCE_MEM && iomem_is_exclusive(res->start))  in pci_mmap_resource()
83 		return -EINVAL;  in pci_mmap_resource()
86 		return -EINVAL;  in pci_mmap_resource()
88 	pcibios_resource_to_bus(pdev->bus, &bar, res);  in pci_mmap_resource()
89 	vma->vm_pgoff += bar.start >> (PAGE_SHIFT - (sparse ? 5 : 0));  in pci_mmap_resource()
90 	mmap_type = res->flags & IORESOURCE_MEM ? pci_mmap_mem : pci_mmap_io;  in pci_mmap_resource()
92 	return hose_mmap_page_range(pdev->sysdata, vma, mmap_type, sparse);  in pci_mmap_resource()
110  * pci_remove_resource_files - cleanup resource files
123 		res_attr = pdev->res_attr[i];  in pci_remove_resource_files()
125 			sysfs_remove_bin_file(&pdev->dev.kobj, res_attr);  in pci_remove_resource_files()
129 		res_attr = pdev->res_attr_wc[i];  in pci_remove_resource_files()
131 			sysfs_remove_bin_file(&pdev->dev.kobj, res_attr);  in pci_remove_resource_files()
137 static int sparse_mem_mmap_fits(struct pci_dev *pdev, int num)  in sparse_mem_mmap_fits()  argument
140 	struct pci_controller *hose = pdev->sysdata;  in sparse_mem_mmap_fits()
144 	pcibios_resource_to_bus(pdev->bus, &bar, &pdev->resource[num]);  in sparse_mem_mmap_fits()
149 	   to 128M or 512M of the bus space. */  in sparse_mem_mmap_fits()
150 	dense_offset = (long)(hose->dense_mem_base - hose->sparse_mem_base);  in sparse_mem_mmap_fits()
156 static int pci_create_one_attr(struct pci_dev *pdev, int num, char *name,  in pci_create_one_attr()  argument
160 	size_t size = pci_resource_len(pdev, num);  in pci_create_one_attr()
162 	sprintf(name, "resource%d%s", num, suffix);  in pci_create_one_attr()
163 	res_attr->mmap = sparse ? pci_mmap_resource_sparse :  in pci_create_one_attr()
165 	res_attr->attr.name = name;  in pci_create_one_attr()
166 	res_attr->attr.mode = S_IRUSR | S_IWUSR;  in pci_create_one_attr()
167 	res_attr->size = sparse ? size << 5 : size;  in pci_create_one_attr()
168 	res_attr->private = &pdev->resource[num];  in pci_create_one_attr()
169 	return sysfs_create_bin_file(&pdev->dev.kobj, res_attr);  in pci_create_one_attr()
172 static int pci_create_attr(struct pci_dev *pdev, int num)  in pci_create_attr()  argument
178 	struct pci_controller *hose = pdev->sysdata;  in pci_create_attr()
184 	if (pdev->resource[num].flags & IORESOURCE_MEM) {  in pci_create_attr()
185 		sparse_base = hose->sparse_mem_base;  in pci_create_attr()
186 		dense_base = hose->dense_mem_base;  in pci_create_attr()
187 		if (sparse_base && !sparse_mem_mmap_fits(pdev, num)) {  in pci_create_attr()
193 		sparse_base = hose->sparse_io_base;  in pci_create_attr()
194 		dense_base = hose->dense_io_base;  in pci_create_attr()
208 		return -ENOMEM;  in pci_create_attr()
212 	pdev->res_attr[num] = attr;  in pci_create_attr()
213 	retval = pci_create_one_attr(pdev, num, attr_name, suffix, attr,  in pci_create_attr()
221 	pdev->res_attr_wc[num] = attr;  in pci_create_attr()
222 	return pci_create_one_attr(pdev, num, attr_name, "_dense", attr, 0);  in pci_create_attr()
226  * pci_create_resource_files - create resource files in sysfs for @pdev
254 /* Legacy I/O bus mapping stuff. */
263 	start = vma->vm_pgoff;  in __legacy_mmap_fits()
264 	size = ((res_size - 1) >> PAGE_SHIFT) + 1;  in __legacy_mmap_fits()
266 	if (start < size && size - start >= nr)  in __legacy_mmap_fits()
268 	WARN(1, "process \"%s\" tried to map%s 0x%08lx-0x%08lx on hose %d "  in __legacy_mmap_fits()
270 		current->comm, sparse ? " sparse" : "", start, start + nr,  in __legacy_mmap_fits()
271 		hose->index, size);  in __legacy_mmap_fits()
280 	base = (mmap_type == pci_mmap_mem) ? hose->sparse_mem_base :  in has_sparse()
281 					     hose->sparse_io_base;  in has_sparse()
286 int pci_mmap_legacy_page_range(struct pci_bus *bus, struct vm_area_struct *vma,  in pci_mmap_legacy_page_range()  argument
289 	struct pci_controller *hose = bus->sysdata;  in pci_mmap_legacy_page_range()
293 	res_size = (mmap_type == pci_mmap_mem) ? bus->legacy_mem->size :  in pci_mmap_legacy_page_range()
294 						 bus->legacy_io->size;  in pci_mmap_legacy_page_range()
296 		return -EINVAL;  in pci_mmap_legacy_page_range()
302  * pci_adjust_legacy_attr - adjustment of legacy file attributes
303  * @bus: bus to create files under
308 void pci_adjust_legacy_attr(struct pci_bus *bus, enum pci_mmap_state mmap_type)  in pci_adjust_legacy_attr()  argument
310 	struct pci_controller *hose = bus->sysdata;  in pci_adjust_legacy_attr()
316 		bus->legacy_mem->attr.name = "legacy_mem_sparse";  in pci_adjust_legacy_attr()
317 		bus->legacy_mem->size <<= 5;  in pci_adjust_legacy_attr()
319 		bus->legacy_io->attr.name = "legacy_io_sparse";  in pci_adjust_legacy_attr()
320 		bus->legacy_io->size <<= 5;  in pci_adjust_legacy_attr()
325 /* Legacy I/O bus read/write functions */
326 int pci_legacy_read(struct pci_bus *bus, loff_t port, u32 *val, size_t size)  in pci_legacy_read()  argument
328 	struct pci_controller *hose = bus->sysdata;  in pci_legacy_read()
330 	port += hose->io_space->start;  in pci_legacy_read()
338 			return -EINVAL;  in pci_legacy_read()
343 			return -EINVAL;  in pci_legacy_read()
347 	return -EINVAL;  in pci_legacy_read()
350 int pci_legacy_write(struct pci_bus *bus, loff_t port, u32 val, size_t size)  in pci_legacy_write()  argument
352 	struct pci_controller *hose = bus->sysdata;  in pci_legacy_write()
354 	port += hose->io_space->start;  in pci_legacy_write()
362 			return -EINVAL;  in pci_legacy_write()
367 			return -EINVAL;  in pci_legacy_write()
371 	return -EINVAL;  in pci_legacy_write()