1 // SPDX-License-Identifier: GPL-2.0
32 	struct resource *res = dev->resource + resno;  in pci_std_update_resource()
34 	/* Per SR-IOV spec 3.4.1.11, VF BARs are RO zero */  in pci_std_update_resource()
35 	if (dev->is_virtfn)  in pci_std_update_resource()
42 	if (!res->flags)  in pci_std_update_resource()
45 	if (res->flags & IORESOURCE_UNSET)  in pci_std_update_resource()
49 	 * Ignore non-moveable resources.  This might be legacy resources for  in pci_std_update_resource()
53 	if (res->flags & IORESOURCE_PCI_FIXED)  in pci_std_update_resource()
56 	pcibios_resource_to_bus(dev->bus, &region, res);  in pci_std_update_resource()
59 	if (res->flags & IORESOURCE_IO) {  in pci_std_update_resource()
61 		new |= res->flags & ~PCI_BASE_ADDRESS_IO_MASK;  in pci_std_update_resource()
66 		new |= res->flags & ~PCI_BASE_ADDRESS_MEM_MASK;  in pci_std_update_resource()
78 		if (!(res->flags & IORESOURCE_ROM_ENABLE))  in pci_std_update_resource()
81 		reg = dev->rom_base_reg;  in pci_std_update_resource()
87 	 * We can't update a 64-bit BAR atomically, so when possible,  in pci_std_update_resource()
88 	 * disable decoding so that a half-updated BAR won't conflict  in pci_std_update_resource()
91 	disable = (res->flags & IORESOURCE_MEM_64) && !dev->mmio_always_on;  in pci_std_update_resource()
106 	if (res->flags & IORESOURCE_MEM_64) {  in pci_std_update_resource()
132 	struct resource *res = &dev->resource[resource];  in pci_claim_resource()
135 	if (res->flags & IORESOURCE_UNSET) {  in pci_claim_resource()
138 		return -EINVAL;  in pci_claim_resource()
146 	if (res->flags & IORESOURCE_ROM_SHADOW)  in pci_claim_resource()
153 		res->flags |= IORESOURCE_UNSET;  in pci_claim_resource()
154 		return -EINVAL;  in pci_claim_resource()
160 			 resource, res, conflict->name, conflict);  in pci_claim_resource()
161 		res->flags |= IORESOURCE_UNSET;  in pci_claim_resource()
162 		return -EBUSY;  in pci_claim_resource()
174 	/* Prefetchable MMIO Base/Limit */  in pci_disable_bridge_window()
185  * Can be over-ridden by architecture specific code that implements
202 		return -ENOMEM;  in pci_revert_fw_address()
204 	start = res->start;  in pci_revert_fw_address()
205 	end = res->end;  in pci_revert_fw_address()
206 	res->start = fw_addr;  in pci_revert_fw_address()
207 	res->end = res->start + size - 1;  in pci_revert_fw_address()
208 	res->flags &= ~IORESOURCE_UNSET;  in pci_revert_fw_address()
212 		if (res->flags & IORESOURCE_IO)  in pci_revert_fw_address()
223 			 resno, res, conflict->name, conflict);  in pci_revert_fw_address()
224 		res->start = start;  in pci_revert_fw_address()
225 		res->end = end;  in pci_revert_fw_address()
226 		res->flags |= IORESOURCE_UNSET;  in pci_revert_fw_address()
227 		return -EBUSY;  in pci_revert_fw_address()
242        return res->start;  in pcibios_align_resource()
248 	struct resource *res = dev->resource + resno;  in __pci_assign_resource()
252 	min = (res->flags & IORESOURCE_IO) ? PCIBIOS_MIN_IO : PCIBIOS_MIN_MEM;  in __pci_assign_resource()
255 	 * First, try exact prefetching match.  Even if a 64-bit  in __pci_assign_resource()
256 	 * prefetchable bridge window is below 4GB, we can't put a 32-bit  in __pci_assign_resource()
257 	 * prefetchable resource in it because pbus_size_mem() assumes a  in __pci_assign_resource()
258 	 * 64-bit window will contain no 32-bit resources.  If we assign  in __pci_assign_resource()
268 	 * If the prefetchable window is only 32 bits wide, we can put  in __pci_assign_resource()
269 	 * 64-bit prefetchable resources in it.  in __pci_assign_resource()
271 	if ((res->flags & (IORESOURCE_PREFETCH | IORESOURCE_MEM_64)) ==  in __pci_assign_resource()
282 	 * in a non-prefetchable window.  If this resource is 32 bits and  in __pci_assign_resource()
283 	 * non-prefetchable, the first call already tried the only possibility  in __pci_assign_resource()
286 	if (res->flags & (IORESOURCE_PREFETCH | IORESOURCE_MEM_64))  in __pci_assign_resource()
299 	bus = dev->bus;  in _pci_assign_resource()
301 		if (!bus->parent || !bus->self->transparent)  in _pci_assign_resource()
303 		bus = bus->parent;  in _pci_assign_resource()
311 	struct resource *res = dev->resource + resno;  in pci_assign_resource()
315 	if (res->flags & IORESOURCE_PCI_FIXED)  in pci_assign_resource()
318 	res->flags |= IORESOURCE_UNSET;  in pci_assign_resource()
323 		return -EINVAL;  in pci_assign_resource()
344 	res->flags &= ~IORESOURCE_UNSET;  in pci_assign_resource()
345 	res->flags &= ~IORESOURCE_STARTALIGN;  in pci_assign_resource()
357 	struct resource *res = dev->resource + resno;  in pci_reassign_resource()
362 	if (res->flags & IORESOURCE_PCI_FIXED)  in pci_reassign_resource()
365 	flags = res->flags;  in pci_reassign_resource()
366 	res->flags |= IORESOURCE_UNSET;  in pci_reassign_resource()
367 	if (!res->parent) {  in pci_reassign_resource()
370 		return -EINVAL;  in pci_reassign_resource()
377 		res->flags = flags;  in pci_reassign_resource()
383 	res->flags &= ~IORESOURCE_UNSET;  in pci_reassign_resource()
384 	res->flags &= ~IORESOURCE_STARTALIGN;  in pci_reassign_resource()
395 	struct resource *res = dev->resource + resno;  in pci_release_resource()
399 	if (!res->parent)  in pci_release_resource()
403 	res->end = resource_size(res) - 1;  in pci_release_resource()
404 	res->start = 0;  in pci_release_resource()
405 	res->flags |= IORESOURCE_UNSET;  in pci_release_resource()
411 	struct resource *res = dev->resource + resno;  in pci_resize_resource()
417 	if (!(res->flags & IORESOURCE_UNSET))  in pci_resize_resource()
418 		return -EBUSY;  in pci_resize_resource()
422 		return -EBUSY;  in pci_resize_resource()
426 		return -ENOTSUPP;  in pci_resize_resource()
429 		return -EINVAL;  in pci_resize_resource()
439 	res->end = res->start + pci_rebar_size_to_bytes(size) - 1;  in pci_resize_resource()
442 	if (dev->bus->self) {  in pci_resize_resource()
443 		ret = pci_reassign_bridge_resources(dev->bus->self, res->flags);  in pci_resize_resource()
451 	res->end = res->start + pci_rebar_size_to_bytes(old) - 1;  in pci_resize_resource()
469 		r = &dev->resource[i];  in pci_enable_resources()
471 		if (!(r->flags & (IORESOURCE_IO | IORESOURCE_MEM)))  in pci_enable_resources()
474 				(!(r->flags & IORESOURCE_ROM_ENABLE)))  in pci_enable_resources()
477 		if (r->flags & IORESOURCE_UNSET) {  in pci_enable_resources()
480 			return -EINVAL;  in pci_enable_resources()
483 		if (!r->parent) {  in pci_enable_resources()
486 			return -EINVAL;  in pci_enable_resources()
489 		if (r->flags & IORESOURCE_IO)  in pci_enable_resources()
491 		if (r->flags & IORESOURCE_MEM)  in pci_enable_resources()
496 		pci_info(dev, "enabling device (%04x -> %04x)\n", old_cmd, cmd);  in pci_enable_resources()