diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/tile/include/hv/drv_trio_intf.h | 3 | ||||
| -rw-r--r-- | arch/tile/kernel/pci_gx.c | 33 |
2 files changed, 33 insertions, 3 deletions
diff --git a/arch/tile/include/hv/drv_trio_intf.h b/arch/tile/include/hv/drv_trio_intf.h index ec643a02b4c5..237e04dee66c 100644 --- a/arch/tile/include/hv/drv_trio_intf.h +++ b/arch/tile/include/hv/drv_trio_intf.h @@ -168,6 +168,9 @@ pcie_stream_intr_config_sel_t; struct pcie_trio_ports_property { struct pcie_port_property ports[TILEGX_TRIO_PCIES]; + + /** Set if this TRIO belongs to a Gx72 device. */ + uint8_t is_gx72; }; /* Flags indicating traffic class. */ diff --git a/arch/tile/kernel/pci_gx.c b/arch/tile/kernel/pci_gx.c index de5008b72fa3..f2bf200b641b 100644 --- a/arch/tile/kernel/pci_gx.c +++ b/arch/tile/kernel/pci_gx.c @@ -436,9 +436,26 @@ int __init tile_pci_init(void) /* * Now determine which PCIe ports are configured to operate in RC - * mode. To use a port, it must be allowed to be in RC mode by the + * mode. There is a differece in the port configuration capability + * between the Gx36 and Gx72 devices. + * + * The Gx36 has configuration capability for each of the 3 PCIe + * interfaces (disable, auto endpoint, auto RC, etc.). + * On the Gx72, you can only select one of the 3 PCIe interfaces per + * TRIO to train automatically. Further, the allowable training modes + * are reduced to four options (auto endpoint, auto RC, stream x1, + * stream x4). + * + * For Gx36 ports, it must be allowed to be in RC mode by the * Board Information Block, and the hardware strapping pins must be * set to RC mode. + * + * For Gx72 ports, the port will operate in RC mode if either of the + * following is true: + * 1. It is allowed to be in RC mode by the Board Information Block, + * and the BIB doesn't allow the EP mode. + * 2. It is allowed to be in either the RC or the EP mode by the BIB, + * and the hardware strapping pin is set to RC mode. */ for (i = 0; i < TILEGX_NUM_TRIO; i++) { gxio_trio_context_t *context = &trio_contexts[i]; @@ -447,8 +464,18 @@ int __init tile_pci_init(void) continue; for (j = 0; j < TILEGX_TRIO_PCIES; j++) { - if (pcie_ports[i].ports[j].allow_rc && - strapped_for_rc(context, j)) { + int is_rc = 0; + + if (pcie_ports[i].is_gx72 && + pcie_ports[i].ports[j].allow_rc) { + if (!pcie_ports[i].ports[j].allow_ep || + strapped_for_rc(context, j)) + is_rc = 1; + } else if (pcie_ports[i].ports[j].allow_rc && + strapped_for_rc(context, j)) { + is_rc = 1; + } + if (is_rc) { pcie_rc[i][j] = 1; num_rc_controllers++; } |