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authorVaibhav Jain <vaibhav@linux.vnet.ibm.com>2018-04-17 10:41:02 +0530
committerMichael Ellerman <mpe@ellerman.id.au>2018-06-02 01:48:10 +1000
commit9a6d2022bacd8fca0be6297459a02dfd28dad6ba (patch)
tree8e136f2e448d797a1f2afcacfe12132c8d1a4a36
parentb6c84ba22ff3a198eb8d5552cf9b8fda1d792e54 (diff)
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: 5632874311db ("cxl: Add support for POWER9 DD2") Cc: stable@vger.kernel.org # v4.15+ Signed-off-by: Vaibhav Jain <vaibhav@linux.vnet.ibm.com> Acked-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com> Reviewed-by: Alastair D'Silva <alastair@d-silva.org> Reviewed-by: Christophe Lombard <clombard@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
-rw-r--r--drivers/misc/cxl/pci.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/misc/cxl/pci.c b/drivers/misc/cxl/pci.c
index 83f1d08058fc..2e8b187956bc 100644
--- 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