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PCI: pci-bridge-emul: Create per-bridge copy of register behavior

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The behavior of the different registers of the PCI-to-PCI bridge is
currently encoded in two global arrays, shared by all instances of
PCI-to-PCI bridge emulation.

However, we will need to tweak the behavior on a per-bridge basis, to
accommodate for different capabilities of the platforms where this
code is used. In preparation for this, create a per-bridge copy of the
register behavior arrays, so that they can later be tweaked on a
per-bridge basis.

Fixes: 1f08673eef ("PCI: mvebu: Convert to PCI emulated bridge config space")
Reported-by: Luís Mendes <luis.p.mendes@gmail.com>
Reported-by: Leigh Brown <leigh@solinno.co.uk>
Tested-by: Leigh Brown <leigh@solinno.co.uk>
Tested-by: Luis Mendes <luis.p.mendes@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: stable@vger.kernel.org
Cc: Luís Mendes <luis.p.mendes@gmail.com>
Cc: Leigh Brown <leigh@solinno.co.uk>
This commit is contained in:
Thomas Petazzoni
2019-02-20 10:48:40 +01:00
committed by Lorenzo Pieralisi
parent bfeffd1552
commit 59f81c35e0
2 changed files with 60 additions and 28 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/pci/pci-bridge-emul.h
View File

@@ -107,15 +107,21 @@ struct pci_bridge_emul_ops {
u32 old, u32 new, u32 mask);
};
struct pci_bridge_reg_behavior;
struct pci_bridge_emul {
struct pci_bridge_emul_conf conf;
struct pci_bridge_emul_pcie_conf pcie_conf;
struct pci_bridge_emul_ops *ops;
struct pci_bridge_reg_behavior *pci_regs_behavior;
struct pci_bridge_reg_behavior *pcie_cap_regs_behavior;
void *data;
bool has_pcie;
};
void pci_bridge_emul_init(struct pci_bridge_emul *bridge);
int pci_bridge_emul_init(struct pci_bridge_emul *bridge);
void pci_bridge_emul_cleanup(struct pci_bridge_emul *bridge);
int pci_bridge_emul_conf_read(struct pci_bridge_emul *bridge, int where,
int size, u32 *value);
int pci_bridge_emul_conf_write(struct pci_bridge_emul *bridge, int where,