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authorKyösti Mälkki <kyosti.malkki@gmail.com>2019-01-23 15:57:13 +0200
committerNico Huber <nico.h@gmx.de>2019-03-06 11:39:57 +0000
commit6fefdfd106baff0cc74551e14d6344408271524a (patch)
tree9c85221dbfdd15c471b44e1c10ba964156775672 /src/device
parente459a89f0f30e705c35855d49f62b67d87092f18 (diff)
downloadcoreboot-6fefdfd106baff0cc74551e14d6344408271524a.tar.xz
device/pci_ops: Simplify logic for PCI bus ops
Nobody ever sets ops_pci_bus. This implies pci_bus_ops() always returns pci_bus_default_ops() and get_pbus returns NULL. Change-Id: Ia30d579e1efe6542dc58714f2e7077507847c0de Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/31684 Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-by: Nico Huber <nico.h@gmx.de> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/device')
-rw-r--r--src/device/pci_ops.c74
1 files changed, 20 insertions, 54 deletions
diff --git a/src/device/pci_ops.c b/src/device/pci_ops.c
index b7c8942ae0..12c4e26d0e 100644
--- a/src/device/pci_ops.c
+++ b/src/device/pci_ops.c
@@ -15,96 +15,62 @@
* GNU General Public License for more details.
*/
+#include <stdint.h>
#include <console/console.h>
+#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ops.h>
-static const struct pci_bus_operations *pci_bus_ops(struct bus *bus, struct device *dev)
+static __always_inline const struct pci_bus_operations *pci_bus_ops(void)
{
- const struct pci_bus_operations *bops;
- bops = NULL;
- if (bus && bus->dev && bus->dev->ops && bus->dev->ops->ops_pci_bus) {
- bops = bus->dev->ops->ops_pci_bus(dev);
- }
- if (!bops)
- bops = pci_bus_default_ops();
- return bops;
+ return pci_bus_default_ops();
}
-/*
- * The only consumer of the return value of get_pbus() is pci_bus_ops().
- * pci_bus_ops() can handle being passed NULL and auto-picks working ops.
- */
-static struct bus *get_pbus(struct device *dev)
+static void pcidev_assert(const struct device *dev)
{
- struct bus *pbus = NULL;
-
- if (!dev)
- die("get_pbus: dev is NULL!\n");
- else
- pbus = dev->bus;
-
- while (pbus && pbus->dev && !pci_bus_ops(pbus, dev)) {
- if (pbus == pbus->dev->bus) {
- printk(BIOS_ALERT, "%s in endless loop looking for a "
- "parent bus with pci_bus_ops for %s, breaking "
- "out.\n", __func__, dev_path(dev));
- break;
- }
- pbus = pbus->dev->bus;
- }
-
- if (!pbus || !pbus->dev || !pbus->dev->ops
- || !pbus->dev->ops->ops_pci_bus) {
- /* This can happen before the device tree is fully set up. */
-
- // printk(BIOS_EMERG, "%s: Cannot find PCI bus operations.\n",
- // dev_path(dev));
-
- pbus = NULL;
- }
-
- return pbus;
+ if (dev)
+ return;
+ die("PCI: dev is NULL!\n");
}
u8 pci_read_config8(struct device *dev, unsigned int where)
{
- struct bus *pbus = get_pbus(dev);
- return pci_bus_ops(pbus, dev)->read8(dev->bus->secondary,
+ pcidev_assert(dev);
+ return pci_bus_ops()->read8(dev->bus->secondary,
dev->path.pci.devfn, where);
}
u16 pci_read_config16(struct device *dev, unsigned int where)
{
- struct bus *pbus = get_pbus(dev);
- return pci_bus_ops(pbus, dev)->read16(dev->bus->secondary,
+ pcidev_assert(dev);
+ return pci_bus_ops()->read16(dev->bus->secondary,
dev->path.pci.devfn, where);
}
u32 pci_read_config32(struct device *dev, unsigned int where)
{
- struct bus *pbus = get_pbus(dev);
- return pci_bus_ops(pbus, dev)->read32(dev->bus->secondary,
+ pcidev_assert(dev);
+ return pci_bus_ops()->read32(dev->bus->secondary,
dev->path.pci.devfn, where);
}
void pci_write_config8(struct device *dev, unsigned int where, u8 val)
{
- struct bus *pbus = get_pbus(dev);
- pci_bus_ops(pbus, dev)->write8(dev->bus->secondary,
+ pcidev_assert(dev);
+ pci_bus_ops()->write8(dev->bus->secondary,
dev->path.pci.devfn, where, val);
}
void pci_write_config16(struct device *dev, unsigned int where, u16 val)
{
- struct bus *pbus = get_pbus(dev);
- pci_bus_ops(pbus, dev)->write16(dev->bus->secondary,
+ pcidev_assert(dev);
+ pci_bus_ops()->write16(dev->bus->secondary,
dev->path.pci.devfn, where, val);
}
void pci_write_config32(struct device *dev, unsigned int where, u32 val)
{
- struct bus *pbus = get_pbus(dev);
- pci_bus_ops(pbus, dev)->write32(dev->bus->secondary,
+ pcidev_assert(dev);
+ pci_bus_ops()->write32(dev->bus->secondary,
dev->path.pci.devfn, where, val);
}