PCI: Move Resizable BAR code to rebar.c

For lack of a better place to put it, Resizable BAR code has been placed
inside pci.c and setup-res.c that do not use it for anything.  Upcoming
changes are going to add more Resizable BAR related functions, increasing
the code size.

As pci.c is huge as is, move the Resizable BAR related code and the BAR
resize code from setup-res.c to rebar.c.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Link: https://patch.msgid.link/20251113180053.27944-2-ilpo.jarvinen@linux.intel.com

1 files changed, 0 insertions, 85 deletions

diff --git a/drivers/pci/setup-res.c b/drivers/pci/setup-res.c
index caec9fec5d03..e5fcadfc58b0 100644
--- a/drivers/pci/setup-res.c
+++ b/drivers/pci/setup-res.c
@@ -431,91 +431,6 @@ int pci_release_resource(struct pci_dev *dev, int resno)
 }
 EXPORT_SYMBOL(pci_release_resource);
 
-static bool pci_resize_is_memory_decoding_enabled(struct pci_dev *dev,
-						  int resno)
-{
-	u16 cmd;
-
-	if (pci_resource_is_iov(resno))
-		return pci_iov_is_memory_decoding_enabled(dev);
-
-	pci_read_config_word(dev, PCI_COMMAND, &cmd);
-
-	return cmd & PCI_COMMAND_MEMORY;
-}
-
-void pci_resize_resource_set_size(struct pci_dev *dev, int resno, int size)
-{
-	resource_size_t res_size = pci_rebar_size_to_bytes(size);
-	struct resource *res = pci_resource_n(dev, resno);
-
-	if (pci_resource_is_iov(resno))
-		res_size *= pci_sriov_get_totalvfs(dev);
-
-	resource_set_size(res, res_size);
-}
-
-/**
- * pci_resize_resource - reconfigure a Resizable BAR and resources
- * @dev: the PCI device
- * @resno: index of the BAR to be resized
- * @size: new size as defined in the spec (0=1MB, 31=128TB)
- * @exclude_bars: a mask of BARs that should not be released
- *
- * Reconfigure @resno to @size and re-run resource assignment algorithm
- * with the new size.
- *
- * Prior to resize, release @dev resources that share a bridge window with
- * @resno.  This unpins the bridge window resource to allow changing it.
- *
- * The caller may prevent releasing a particular BAR by providing
- * @exclude_bars mask, but this may result in the resize operation failing
- * due to insufficient space.
- *
- * Return: 0 on success, or negative on error. In case of an error, the
- *         resources are restored to their original places.
- */
-int pci_resize_resource(struct pci_dev *dev, int resno, int size,
-			int exclude_bars)
-{
-	struct pci_host_bridge *host;
-	int old, ret;
-	u32 sizes;
-
-	/* Check if we must preserve the firmware's resource assignment */
-	host = pci_find_host_bridge(dev->bus);
-	if (host->preserve_config)
-		return -ENOTSUPP;
-
-	if (pci_resize_is_memory_decoding_enabled(dev, resno))
-		return -EBUSY;
-
-	sizes = pci_rebar_get_possible_sizes(dev, resno);
-	if (!sizes)
-		return -ENOTSUPP;
-
-	if (!(sizes & BIT(size)))
-		return -EINVAL;
-
-	old = pci_rebar_get_current_size(dev, resno);
-	if (old < 0)
-		return old;
-
-	ret = pci_rebar_set_size(dev, resno, size);
-	if (ret)
-		return ret;
-
-	ret = pci_do_resource_release_and_resize(dev, resno, size, exclude_bars);
-	if (ret)
-		goto error_resize;
-	return 0;
-
-error_resize:
-	pci_rebar_set_size(dev, resno, old);
-	return ret;
-}
-EXPORT_SYMBOL(pci_resize_resource);
-
 int pci_enable_resources(struct pci_dev *dev, int mask)
 {
 	u16 cmd, old_cmd;