diff options
| author | Michael Brown <mcb30@ipxe.org> | 2022-11-13 20:45:38 +0000 |
|---|---|---|
| committer | Michael Brown <mcb30@ipxe.org> | 2022-11-13 20:47:32 +0000 |
| commit | 6677a5a2901287468853ee418a8ac26ecaf0b65c (patch) | |
| tree | 20e4364923e725d91ac259040d403a0d420c4905 | |
| parent | ca2be7e094c900542e36f70f3abc3c8ff7c3055d (diff) | |
| download | ipxe-flr.tar.gz | |
[pci] Backup and restore standard config space across PCIe FLRflr
Signed-off-by: Michael Brown <mcb30@ipxe.org>
| -rw-r--r-- | src/drivers/bus/pciextra.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/src/drivers/bus/pciextra.c b/src/drivers/bus/pciextra.c index 23617bc9a..1eeb9b2a0 100644 --- a/src/drivers/bus/pciextra.c +++ b/src/drivers/bus/pciextra.c @@ -3,6 +3,7 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); #include <stdint.h> #include <ipxe/timer.h> #include <ipxe/pci.h> +#include <ipxe/pcibackup.h> static int pci_find_capability_common ( struct pci_device *pci, uint8_t pos, int cap ) { @@ -121,8 +122,12 @@ unsigned long pci_bar_size ( struct pci_device *pci, unsigned int reg ) { * @v exp PCI Express Capability address */ void pci_reset ( struct pci_device *pci, unsigned int exp ) { + struct pci_config_backup backup; uint16_t control; + /* Back up configuration space */ + pci_backup ( pci, &backup, PCI_CONFIG_BACKUP_STANDARD, NULL ); + /* Perform a PCIe function-level reset */ pci_read_config_word ( pci, ( exp + PCI_EXP_DEVCTL ), &control ); control |= PCI_EXP_DEVCTL_FLR; @@ -131,6 +136,6 @@ void pci_reset ( struct pci_device *pci, unsigned int exp ) { /* Allow time for reset to complete */ mdelay ( PCI_EXP_FLR_DELAY_MS ); - /* Re-enable device */ - adjust_pci_device ( pci ); + /* Restore configuration */ + pci_restore ( pci, &backup, PCI_CONFIG_BACKUP_STANDARD, NULL ); } |