--- /dev/null
+/*
+ * Copyright 2012 Red Hat Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: Ben Skeggs
+ */
+#include <subdev/bios.h>
+#include <subdev/bios/dcb.h>
+
+#include <core/device.h>
+
+u16
+dcb_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
+{
+ struct nvkm_device *device = nv_device(bios);
+ u16 dcb = 0x0000;
+
+ if (device->card_type > NV_04)
+ dcb = nv_ro16(bios, 0x36);
+ if (!dcb) {
+ nv_warn(bios, "DCB table not found\n");
+ return dcb;
+ }
+
+ *ver = nv_ro08(bios, dcb);
+
+ if (*ver >= 0x42) {
+ nv_warn(bios, "DCB version 0x%02x unknown\n", *ver);
+ return 0x0000;
+ } else
+ if (*ver >= 0x30) {
+ if (nv_ro32(bios, dcb + 6) == 0x4edcbdcb) {
+ *hdr = nv_ro08(bios, dcb + 1);
+ *cnt = nv_ro08(bios, dcb + 2);
+ *len = nv_ro08(bios, dcb + 3);
+ return dcb;
+ }
+ } else
+ if (*ver >= 0x20) {
+ if (nv_ro32(bios, dcb + 4) == 0x4edcbdcb) {
+ u16 i2c = nv_ro16(bios, dcb + 2);
+ *hdr = 8;
+ *cnt = (i2c - dcb) / 8;
+ *len = 8;
+ return dcb;
+ }
+ } else
+ if (*ver >= 0x15) {
+ if (!nv_memcmp(bios, dcb - 7, "DEV_REC", 7)) {
+ u16 i2c = nv_ro16(bios, dcb + 2);
+ *hdr = 4;
+ *cnt = (i2c - dcb) / 10;
+ *len = 10;
+ return dcb;
+ }
+ } else {
+ /*
+ * v1.4 (some NV15/16, NV11+) seems the same as v1.5, but
+ * always has the same single (crt) entry, even when tv-out
+ * present, so the conclusion is this version cannot really
+ * be used.
+ *
+ * v1.2 tables (some NV6/10, and NV15+) normally have the
+ * same 5 entries, which are not specific to the card and so
+ * no use.
+ *
+ * v1.2 does have an I2C table that read_dcb_i2c_table can
+ * handle, but cards exist (nv11 in #14821) with a bad i2c
+ * table pointer, so use the indices parsed in
+ * parse_bmp_structure.
+ *
+ * v1.1 (NV5+, maybe some NV4) is entirely unhelpful
+ */
+ nv_warn(bios, "DCB contains no useful data\n");
+ return 0x0000;
+ }
+
+ nv_warn(bios, "DCB header validation failed\n");
+ return 0x0000;
+}
+
+u16
+dcb_outp(struct nvkm_bios *bios, u8 idx, u8 *ver, u8 *len)
+{
+ u8 hdr, cnt;
+ u16 dcb = dcb_table(bios, ver, &hdr, &cnt, len);
+ if (dcb && idx < cnt)
+ return dcb + hdr + (idx * *len);
+ return 0x0000;
+}
+
+static inline u16
+dcb_outp_hasht(struct dcb_output *outp)
+{
+ return (outp->extdev << 8) | (outp->location << 4) | outp->type;
+}
+
+static inline u16
+dcb_outp_hashm(struct dcb_output *outp)
+{
+ return (outp->heads << 8) | (outp->link << 6) | outp->or;
+}
+
+u16
+dcb_outp_parse(struct nvkm_bios *bios, u8 idx, u8 *ver, u8 *len,
+ struct dcb_output *outp)
+{
+ u16 dcb = dcb_outp(bios, idx, ver, len);
+ memset(outp, 0x00, sizeof(*outp));
+ if (dcb) {
+ if (*ver >= 0x20) {
+ u32 conn = nv_ro32(bios, dcb + 0x00);
+ outp->or = (conn & 0x0f000000) >> 24;
+ outp->location = (conn & 0x00300000) >> 20;
+ outp->bus = (conn & 0x000f0000) >> 16;
+ outp->connector = (conn & 0x0000f000) >> 12;
+ outp->heads = (conn & 0x00000f00) >> 8;
+ outp->i2c_index = (conn & 0x000000f0) >> 4;
+ outp->type = (conn & 0x0000000f);
+ outp->link = 0;
+ } else {
+ dcb = 0x0000;
+ }
+
+ if (*ver >= 0x40) {
+ u32 conf = nv_ro32(bios, dcb + 0x04);
+ switch (outp->type) {
+ case DCB_OUTPUT_DP:
+ switch (conf & 0x00e00000) {
+ case 0x00000000:
+ outp->dpconf.link_bw = 0x06;
+ break;
+ case 0x00200000:
+ outp->dpconf.link_bw = 0x0a;
+ break;
+ case 0x00400000:
+ default:
+ outp->dpconf.link_bw = 0x14;
+ break;
+ }
+
+ outp->dpconf.link_nr = (conf & 0x0f000000) >> 24;
+ if (*ver < 0x41) {
+ switch (outp->dpconf.link_nr) {
+ case 0x0f:
+ outp->dpconf.link_nr = 4;
+ break;
+ case 0x03:
+ outp->dpconf.link_nr = 2;
+ break;
+ case 0x01:
+ default:
+ outp->dpconf.link_nr = 1;
+ break;
+ }
+ }
+
+ /* fall-through... */
+ case DCB_OUTPUT_TMDS:
+ case DCB_OUTPUT_LVDS:
+ outp->link = (conf & 0x00000030) >> 4;
+ outp->sorconf.link = outp->link; /*XXX*/
+ outp->extdev = 0x00;
+ if (outp->location != 0)
+ outp->extdev = (conf & 0x0000ff00) >> 8;
+ break;
+ default:
+ break;
+ }
+ }
+
+ outp->hasht = dcb_outp_hasht(outp);
+ outp->hashm = dcb_outp_hashm(outp);
+ }
+ return dcb;
+}
+
+u16
+dcb_outp_match(struct nvkm_bios *bios, u16 type, u16 mask,
+ u8 *ver, u8 *len, struct dcb_output *outp)
+{
+ u16 dcb, idx = 0;
+ while ((dcb = dcb_outp_parse(bios, idx++, ver, len, outp))) {
+ if ((dcb_outp_hasht(outp) & 0x00ff) == (type & 0x00ff)) {
+ if ((dcb_outp_hashm(outp) & mask) == mask)
+ break;
+ }
+ }
+ return dcb;
+}
+
+int
+dcb_outp_foreach(struct nvkm_bios *bios, void *data,
+ int (*exec)(struct nvkm_bios *, void *, int, u16))
+{
+ int ret, idx = -1;
+ u8 ver, len;
+ u16 outp;
+
+ while ((outp = dcb_outp(bios, ++idx, &ver, &len))) {
+ if (nv_ro32(bios, outp) == 0x00000000)
+ break; /* seen on an NV11 with DCB v1.5 */
+ if (nv_ro32(bios, outp) == 0xffffffff)
+ break; /* seen on an NV17 with DCB v2.0 */
+
+ if (nv_ro08(bios, outp) == DCB_OUTPUT_UNUSED)
+ continue;
+ if (nv_ro08(bios, outp) == DCB_OUTPUT_EOL)
+ break;
+
+ ret = exec(bios, data, idx, outp);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
Code Review / kvmfornfv.git / blobdiff