/* $Id$ * * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. * * Copyright (C) 1992 - 1997, 2000-2001 Silicon Graphics, Inc. All rights reserved. */ #include #include #include #include #include #include #include #include #include #include #include #include #define NEW(ptr) (ptr = kmalloc(sizeof (*(ptr)), GFP_KERNEL)) #define DEL(ptr) (kfree(ptr)) int xswitch_devflag = D_MP; /* * This file provides generic support for Crosstalk * Switches, in a way that insulates crosstalk providers * from specifics about the switch chips being used. */ #include #define DEV_FUNC(dev,func) xbow_##func #if !defined(DEV_FUNC) /* * There is more than one possible provider * for this platform. We need to examine the * master vertex of the current vertex for * a provider function structure, and indirect * through the appropriately named member. */ #define DEV_FUNC(dev,func) xwidget_to_provider_fns(dev)->func static xswitch_provider_t * xwidget_to_provider_fns(devfs_handle_t xconn) { devfs_handle_t busv; xswitch_info_t xswitch_info; xswitch_provider_t provider_fns; busv = hwgraph_connectpt_get(xconn_vhdl); ASSERT(busv != GRAPH_VERTEX_NONE); xswitch_info = xswitch_info_get(busv); ASSERT(xswitch_info != NULL); provider_fns = xswitch_info->xswitch_fns; ASSERT(provider_fns != NULL); return provider_fns; } #endif #define XSWITCH_CENSUS_BIT(port) (1<<(port)) #define XSWITCH_CENSUS_PORT_MIN (0x0) #define XSWITCH_CENSUS_PORT_MAX (0xF) #define XSWITCH_CENSUS_PORTS (0x10) #define XSWITCH_WIDGET_PRESENT(infop,port) ((infop)->census & XSWITCH_CENSUS_BIT(port)) static char xswitch_info_fingerprint[] = "xswitch_info"; struct xswitch_info_s { char *fingerprint; unsigned census; devfs_handle_t vhdl[XSWITCH_CENSUS_PORTS]; devfs_handle_t master_vhdl[XSWITCH_CENSUS_PORTS]; xswitch_provider_t *xswitch_fns; }; xswitch_info_t xswitch_info_get(devfs_handle_t xwidget) { xswitch_info_t xswitch_info; xswitch_info = (xswitch_info_t) hwgraph_fastinfo_get(xwidget); #ifdef LATER if ((xswitch_info != NULL) && (xswitch_info->fingerprint != xswitch_info_fingerprint)) #ifdef SUPPORT_PRINTING_V_FORMAT PRINT_PANIC("%v xswitch_info_get bad fingerprint", xwidget); #else PRINT_PANIC("%x xswitch_info_get bad fingerprint", xwidget); #endif #endif /* LATER */ return (xswitch_info); } void xswitch_info_vhdl_set(xswitch_info_t xswitch_info, xwidgetnum_t port, devfs_handle_t xwidget) { #if XSWITCH_CENSUS_PORT_MIN if (port < XSWITCH_CENSUS_PORT_MIN) return; #endif if (port > XSWITCH_CENSUS_PORT_MAX) return; xswitch_info->vhdl[port - XSWITCH_CENSUS_PORT_MIN] = xwidget; } devfs_handle_t xswitch_info_vhdl_get(xswitch_info_t xswitch_info, xwidgetnum_t port) { #ifdef LATER if (xswitch_info == NULL) PRINT_PANIC("xswitch_info_vhdl_get: null xswitch_info"); #endif #if XSWITCH_CENSUS_PORT_MIN if (port < XSWITCH_CENSUS_PORT_MIN) return GRAPH_VERTEX_NONE; #endif if (port > XSWITCH_CENSUS_PORT_MAX) return GRAPH_VERTEX_NONE; return xswitch_info->vhdl[port - XSWITCH_CENSUS_PORT_MIN]; } /* * Some systems may allow for multiple switch masters. On such systems, * we assign a master for each port on the switch. These interfaces * establish and retrieve that assignment. */ void xswitch_info_master_assignment_set(xswitch_info_t xswitch_info, xwidgetnum_t port, devfs_handle_t master_vhdl) { #if XSWITCH_CENSUS_PORT_MIN if (port < XSWITCH_CENSUS_PORT_MIN) return; #endif if (port > XSWITCH_CENSUS_PORT_MAX) return; xswitch_info->master_vhdl[port - XSWITCH_CENSUS_PORT_MIN] = master_vhdl; } devfs_handle_t xswitch_info_master_assignment_get(xswitch_info_t xswitch_info, xwidgetnum_t port) { #if XSWITCH_CENSUS_PORT_MIN if (port < XSWITCH_CENSUS_PORT_MIN) return GRAPH_VERTEX_NONE; #endif if (port > XSWITCH_CENSUS_PORT_MAX) return GRAPH_VERTEX_NONE; return xswitch_info->master_vhdl[port - XSWITCH_CENSUS_PORT_MIN]; } void xswitch_info_set(devfs_handle_t xwidget, xswitch_info_t xswitch_info) { xswitch_info->fingerprint = xswitch_info_fingerprint; hwgraph_fastinfo_set(xwidget, (arbitrary_info_t) xswitch_info); } xswitch_info_t xswitch_info_new(devfs_handle_t xwidget) { xswitch_info_t xswitch_info; xswitch_info = xswitch_info_get(xwidget); if (xswitch_info == NULL) { int port; NEW(xswitch_info); xswitch_info->census = 0; for (port = XSWITCH_CENSUS_PORT_MIN; port <= XSWITCH_CENSUS_PORT_MAX; port++) { xswitch_info_vhdl_set(xswitch_info, port, GRAPH_VERTEX_NONE); xswitch_info_master_assignment_set(xswitch_info, port, GRAPH_VERTEX_NONE); } xswitch_info_set(xwidget, xswitch_info); } return xswitch_info; } void xswitch_provider_register(devfs_handle_t busv, xswitch_provider_t * xswitch_fns) { xswitch_info_t xswitch_info = xswitch_info_get(busv); ASSERT(xswitch_info); xswitch_info->xswitch_fns = xswitch_fns; } void xswitch_info_link_is_ok(xswitch_info_t xswitch_info, xwidgetnum_t port) { xswitch_info->census |= XSWITCH_CENSUS_BIT(port); } int xswitch_info_link_ok(xswitch_info_t xswitch_info, xwidgetnum_t port) { #if XSWITCH_CENSUS_PORT_MIN if (port < XSWITCH_CENSUS_PORT_MIN) return 0; #endif if (port > XSWITCH_CENSUS_PORT_MAX) return 0; return (xswitch_info->census & XSWITCH_CENSUS_BIT(port)); } int xswitch_reset_link(devfs_handle_t xconn_vhdl) { return DEV_FUNC(xconn_vhdl, reset_link) (xconn_vhdl); } /* Given a vertex handle to the xswitch get its logical * id. */ int xswitch_id_get(devfs_handle_t xconn_vhdl) { arbitrary_info_t xbow_num; graph_error_t rv; rv = hwgraph_info_get_LBL(xconn_vhdl,INFO_LBL_XSWITCH_ID,&xbow_num); ASSERT(rv == GRAPH_SUCCESS); return(xbow_num); } /* Given a vertex handle to the xswitch set its logical * id. */ void xswitch_id_set(devfs_handle_t xconn_vhdl,int xbow_num) { graph_error_t rv; rv = hwgraph_info_add_LBL(xconn_vhdl,INFO_LBL_XSWITCH_ID, (arbitrary_info_t)xbow_num); ASSERT(rv == GRAPH_SUCCESS); }