[SCSI] aic7xxx: Add suspend/resume support

The aic7xxx driver already contains fragments for suspend/resume
support. So we only need to update them to the current interface
and have full PCI suspend/resume.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Tested-by: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 27 insertions, 0 deletions

diff --git a/drivers/scsi/aic7xxx/aic79xx_pci.c b/drivers/scsi/aic7xxx/aic79xx_pci.c
index 0bada0028aa0..7a203a90601a 100644
--- a/drivers/scsi/aic7xxx/aic79xx_pci.c
+++ b/drivers/scsi/aic7xxx/aic79xx_pci.c
@@ -389,6 +389,33 @@ ahd_pci_config(struct ahd_softc *ahd, struct ahd_pci_identity *entry)
         return error;
 }
 
+void
+ahd_pci_suspend(struct ahd_softc *ahd)
+{
+        /*
+         * Save chip register configuration data for chip resets
+         * that occur during runtime and resume events.
+         */
+        ahd->suspend_state.pci_state.devconfig =
+            ahd_pci_read_config(ahd->dev_softc, DEVCONFIG, /*bytes*/4);
+        ahd->suspend_state.pci_state.command =
+            ahd_pci_read_config(ahd->dev_softc, PCIR_COMMAND, /*bytes*/1);
+        ahd->suspend_state.pci_state.csize_lattime =
+            ahd_pci_read_config(ahd->dev_softc, CSIZE_LATTIME, /*bytes*/1);
+
+}
+
+void
+ahd_pci_resume(struct ahd_softc *ahd)
+{
+        ahd_pci_write_config(ahd->dev_softc, DEVCONFIG,
+                             ahd->suspend_state.pci_state.devconfig, /*bytes*/4);
+        ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND,
+                             ahd->suspend_state.pci_state.command, /*bytes*/1);
+        ahd_pci_write_config(ahd->dev_softc, CSIZE_LATTIME,
+                             ahd->suspend_state.pci_state.csize_lattime, /*bytes*/1);
+}
+
 /*
  * Perform some simple tests that should catch situations where
  * our registers are invalidly mapped.