cxl: Configure PSL to not use APC virtual machines

APC virtual machines arent used on POWER-9 chips and are already disabled in on-chip CAPP. They also need to be disabled on the PSL via 'PSL Data Send Control Register' by setting bit(47). This forces the PSL to send commands to CAPP with queue.id == 0. Fixes: 5632874 ("cxl: Add support for POWER9 DD2") Cc: [email protected] # v4.15+ Signed-off-by: Vaibhav Jain <[email protected]> Acked-by: Andrew Donnellan <[email protected]> Reviewed-by: Alastair D'Silva <[email protected]> Reviewed-by: Christophe Lombard <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
akvadrako · Jun 1, 2018 · 9a6d202 · 9a6d202
1 parent b6c84ba
commit 9a6d202
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/drivers/misc/cxl/pci.c b/drivers/misc/cxl/pci.c
@@ -514,9 +514,9 @@ static int init_implementation_adapter_regs_psl9(struct cxl *adapter,
 	cxl_p1_write(adapter, CXL_PSL9_FIR_CNTL, psl_fircntl);
 
 	/* Setup the PSL to transmit packets on the PCIe before the
-	 * CAPP is enabled
+	 * CAPP is enabled. Make sure that CAPP virtual machines are disabled
 	 */
-	cxl_p1_write(adapter, CXL_PSL9_DSNDCTL, 0x0001001000002A10ULL);
+	cxl_p1_write(adapter, CXL_PSL9_DSNDCTL, 0x0001001000012A10ULL);
 
 	/*
 	 * A response to an ASB_Notify request is returned by the