Commit 9a6d2022 authored Apr 17, 2018 by Vaibhav Jain Committed by Michael Ellerman Jun 02, 2018

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: 56328743 ("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>

parent b6c84ba2

drivers/misc/cxl/pci.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -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

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