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authorMatt Hsiao <matt.hsiao@hpe.com>2021-05-31 11:55:51 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2021-06-04 16:28:23 +0300
commit23d51b818151273125e35b1a1ce1b294f7d8c073 (patch)
treebbbc46b9603139a8d1c0c5cb8b3ca98de519b599 /drivers/misc/hpilo.c
parentce52ec5beecc1079c251f60e3973b3758f60eb59 (diff)
downloadlinux-23d51b818151273125e35b1a1ce1b294f7d8c073.tar.xz
misc: hpilo: map iLO shared memory by PCI revision id
Starting from iLO ASIC 'Neches' with subsystem device id 0x00E4, bar 5 is used for shared memory region mapping instead of bar 2 because bar 2 is made inaccessible after system POST for security reason. As this holds true for future iLO ASIC generations, it does not make sense to map shared memory region according to the subsystem device id of each following generations. Map iLO shared memory region with PCI revision id that maps to the iLO ASIC generation, starting from Neches (Rev 7). Signed-off-by: Matt Hsiao <matt.hsiao@hpe.com> Link: https://lore.kernel.org/r/20210531085551.26421-1-matt.hsiao@hpe.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc/hpilo.c')
-rw-r--r--drivers/misc/hpilo.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/misc/hpilo.c b/drivers/misc/hpilo.c
index fea3ae9d8686..8d00df9243c4 100644
--- a/drivers/misc/hpilo.c
+++ b/drivers/misc/hpilo.c
@@ -693,6 +693,8 @@ static int ilo_map_device(struct pci_dev *pdev, struct ilo_hwinfo *hw)
{
int bar;
unsigned long off;
+ u8 pci_rev_id;
+ int rc;
/* map the memory mapped i/o registers */
hw->mmio_vaddr = pci_iomap(pdev, 1, 0);
@@ -702,7 +704,13 @@ static int ilo_map_device(struct pci_dev *pdev, struct ilo_hwinfo *hw)
}
/* map the adapter shared memory region */
- if (pdev->subsystem_device == 0x00E4) {
+ rc = pci_read_config_byte(pdev, PCI_REVISION_ID, &pci_rev_id);
+ if (rc != 0) {
+ dev_err(&pdev->dev, "Error reading PCI rev id: %d\n", rc);
+ goto out;
+ }
+
+ if (pci_rev_id >= PCI_REV_ID_NECHES) {
bar = 5;
/* Last 8k is reserved for CCBs */
off = pci_resource_len(pdev, bar) - 0x2000;