[PATCH kernel v5 07/20] powerpc/pseries/npu: Enable platform support
From: Alexey Kardashevskiy <hidden>
Date: 2018-12-13 06:43:26
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
We already changed NPU API for GPUs to not to call OPAL and the remaining bit is initializing NPU structures. This searches for POWER9 NVLinks attached to any device on a PHB and initializes an NPU structure if any found. Signed-off-by: Alexey Kardashevskiy <redacted> --- Changes: v5: * added WARN_ON_ONCE v4: * dropped "IBM,npu-vphb" compatible type on PHB and use the type of NVLink --- arch/powerpc/platforms/pseries/pci.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+)
diff --git a/arch/powerpc/platforms/pseries/pci.c b/arch/powerpc/platforms/pseries/pci.c
index 41d8a4d..7725825 100644
--- a/arch/powerpc/platforms/pseries/pci.c
+++ b/arch/powerpc/platforms/pseries/pci.c@@ -29,6 +29,7 @@ #include <asm/pci-bridge.h> #include <asm/prom.h> #include <asm/ppc-pci.h> +#include <asm/pci.h> #include "pseries.h" #if 0
@@ -237,6 +238,8 @@ static void __init pSeries_request_regions(void) void __init pSeries_final_fixup(void) { + struct pci_controller *hose; + pSeries_request_regions(); eeh_probe_devices();
@@ -246,6 +249,25 @@ void __init pSeries_final_fixup(void) ppc_md.pcibios_sriov_enable = pseries_pcibios_sriov_enable; ppc_md.pcibios_sriov_disable = pseries_pcibios_sriov_disable; #endif + list_for_each_entry(hose, &hose_list, list_node) { + struct device_node *dn = hose->dn, *nvdn; + + while (1) { + dn = of_find_all_nodes(dn); + if (!dn) + break; + nvdn = of_parse_phandle(dn, "ibm,nvlink", 0); + if (!nvdn) + continue; + if (!of_device_is_compatible(nvdn, "ibm,npu-link")) + continue; + if (!of_device_is_compatible(nvdn->parent, + "ibm,power9-npu")) + continue; + WARN_ON_ONCE(pnv_npu2_init(hose)); + break; + } + } } /*
--
2.17.1