[src/trunk]: src/sys/dev/acpi Allow access to PCI configuration space for dev...

[jmcneill <jmcneill%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/44621ee11e29
branches:  trunk
changeset: 994046:44621ee11e29
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Wed Oct 17 01:16:23 2018 +0000

description:
Allow access to PCI configuration space for devices without extended
config support.

ok nonaka@

diffstat:

 sys/dev/acpi/acpi_mcfg.c |  51 ++++++++++++++++++++++++++++++-----------------
 1 files changed, 32 insertions(+), 19 deletions(-)

diffs (150 lines):

diff -r a44e14f6df7c -r 44621ee11e29 sys/dev/acpi/acpi_mcfg.c
--- a/sys/dev/acpi/acpi_mcfg.c  Wed Oct 17 00:04:06 2018 +0000
+++ b/sys/dev/acpi/acpi_mcfg.c  Wed Oct 17 01:16:23 2018 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: acpi_mcfg.c,v 1.9 2018/10/15 12:46:43 jmcneill Exp $   */
+/*     $NetBSD: acpi_mcfg.c,v 1.10 2018/10/17 01:16:23 jmcneill Exp $  */
 
 /*-
  * Copyright (C) 2015 NONAKA Kimihiro <nonaka%NetBSD.org@localhost>
@@ -28,7 +28,7 @@
 #include "opt_pci.h"
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: acpi_mcfg.c,v 1.9 2018/10/15 12:46:43 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: acpi_mcfg.c,v 1.10 2018/10/17 01:16:23 jmcneill Exp $");
 
 #include <sys/param.h>
 #include <sys/device.h>
@@ -52,9 +52,13 @@
 
 #define        EXTCONF_OFFSET(d, f, r) ((((d) * 8 + (f)) * PCI_EXTCONF_SIZE) + (r))
 
-#define        EXTCONF_SET_VALID(mb, d, f)     ((mb)->valid_devs[(d)] |= __BIT((f)))
-#define        EXTCONF_SET_INVALID(mb, d, f)   ((mb)->valid_devs[(d)] &= ~__BIT((f)))
-#define        EXTCONF_IS_VALID(mb, d, f)      ((mb)->valid_devs[(d)] & __BIT((f)))
+#define        PCIDEV_SET_VALID(mb, d, f)      ((mb)->valid_devs[(d)] |= __BIT((f)))
+#define        PCIDEV_SET_INVALID(mb, d, f)    ((mb)->valid_devs[(d)] &= ~__BIT((f)))
+#define        PCIDEV_IS_VALID(mb, d, f)       ((mb)->valid_devs[(d)] & __BIT((f)))
+
+#define        EXTCONF_SET_VALID(mb, d, f)     ((mb)->valid_extconf[(d)] |= __BIT((f)))
+#define        EXTCONF_SET_INVALID(mb, d, f)   ((mb)->valid_extconf[(d)] &= ~__BIT((f)))
+#define        EXTCONF_IS_VALID(mb, d, f)      ((mb)->valid_extconf[(d)] & __BIT((f)))
 
 struct mcfg_segment {
        uint64_t ms_address;            /* Base address */
@@ -65,6 +69,7 @@
        struct mcfg_bus {
                bus_space_handle_t bsh[32][8];
                uint8_t valid_devs[32];
+               uint8_t valid_extconf[32];
                int valid_ndevs;
                pcitag_t last_probed;
        } *ms_bus;
@@ -489,7 +494,7 @@
                        for (j = last_func; j < end_func; j++) {
                                if (i == last_dev && j == last_func)
                                        continue;
-                               EXTCONF_SET_INVALID(mb, i, j);
+                               PCIDEV_SET_INVALID(mb, i, j);
                        }
                        last_func = 0;
                }
@@ -513,13 +518,14 @@
                    "(cfg[0x%03x]=0x%08x, alias=%s)\n", bus, dev, func,
                    PCI_CONF_SIZE, reg, alias ? "true" : "false");
                EXTCONF_SET_INVALID(mb, dev, func);
-       } else {
-               aprint_debug_dev(acpi_sc->sc_dev,
-                   "MCFG: %03d:%02d:%d: Ok (cfg[0x%03x]=0x%08x)\n",
-                   bus, dev, func, PCI_CONF_SIZE, reg);
-               mb->valid_ndevs++;
        }
 
+       aprint_debug_dev(acpi_sc->sc_dev,
+           "MCFG: %03d:%02d:%d: Ok (cfg[0x%03x]=0x%08x extconf=%c)\n",
+           bus, dev, func, PCI_CONF_SIZE, reg,
+           EXTCONF_IS_VALID(mb, dev, func) ? 'Y' : 'N');
+       mb->valid_ndevs++;
+
        return 0;
 }
 
@@ -587,6 +593,7 @@
 
        /* Probe extended configuration space of all devices. */
        memset(mb->valid_devs, 0xff, sizeof(mb->valid_devs));
+       memset(mb->valid_extconf, 0xff, sizeof(mb->valid_extconf));
        mb->valid_ndevs = 0;
        mb->last_probed = pci_make_tag(pc, bus, 0, 0);
 
@@ -613,7 +620,7 @@
                pci_conf_write(pc, tag, 0x54, reg);
        }
 
-       /* Unmap extended configration space of all dev/func. */
+       /* Unmap configuration space of all dev/func. */
        bus_space_unmap(seg->ms_bst, bsh, ACPIMCFG_SIZE_PER_BUS);
        memset(mb->bsh, 0, sizeof(mb->bsh));
 
@@ -632,15 +639,15 @@
                                /* Don't mark invalid to last probed device. */
                                continue;
                        }
-                       EXTCONF_SET_INVALID(mb, i, j);
+                       PCIDEV_SET_INVALID(mb, i, j);
                }
                last_func = 0;
        }
 
-       /* Map extended configuration space per dev/func. */
+       /* Map configuration space per dev/func. */
        for (i = 0; i < 32; i++) {
                for (j = 0; j < 8; j++) {
-                       if (!EXTCONF_IS_VALID(mb, i, j))
+                       if (!PCIDEV_IS_VALID(mb, i, j))
                                continue;
                        error = bus_space_map(seg->ms_bst,
                            baddr + EXTCONF_OFFSET(i, j, 0), PCI_EXTCONF_SIZE,
@@ -649,7 +656,7 @@
                                /* Unmap all handles when map failed. */
                                do {
                                        while (--j >= 0) {
-                                               if (!EXTCONF_IS_VALID(mb, i, j))
+                                               if (!PCIDEV_IS_VALID(mb, i, j))
                                                        continue;
                                                bus_space_unmap(seg->ms_bst,
                                                    mb->bsh[i][j],
@@ -667,7 +674,7 @@
        aprint_debug_dev(acpi_sc->sc_dev, "MCFG: bus %d: valid devices\n", bus);
        for (i = 0; i < 32; i++) {
                for (j = 0; j < 8; j++) {
-                       if (EXTCONF_IS_VALID(mb, i, j)) {
+                       if (PCIDEV_IS_VALID(mb, i, j)) {
                                aprint_debug_dev(acpi_sc->sc_dev,
                                    "MCFG: %03d:%02d:%d\n", bus, i, j);
                        }
@@ -908,7 +915,11 @@
        }
 
        mb = &seg->ms_bus[bus - seg->ms_bus_start];
-       if (!EXTCONF_IS_VALID(mb, dev, func)) {
+       if (!PCIDEV_IS_VALID(mb, dev, func)) {
+               *data = -1;
+               return EINVAL;
+       }
+       if (!EXTCONF_IS_VALID(mb, dev, func) && reg >= PCI_CONF_SIZE) {
                *data = -1;
                return EINVAL;
        }
@@ -937,7 +948,9 @@
                return ERANGE;
 
        mb = &seg->ms_bus[bus - seg->ms_bus_start];
-       if (!EXTCONF_IS_VALID(mb, dev, func))
+       if (!PCIDEV_IS_VALID(mb, dev, func))
+               return EINVAL;
+       if (!EXTCONF_IS_VALID(mb, dev, func) && reg >= PCI_CONF_SIZE)
                return EINVAL;
 
        mcfg_ops->ao_write(seg->ms_bst, mb->bsh[dev][func], reg, data);