[Nouveau] [PATCH v3 1/3] nvbios/power_budget: Add basic power budget parsing
Karol Herbst
karolherbst at gmail.com
Wed Nov 30 19:48:37 UTC 2016
v2: Set entry to 0xff if not found
Add cap entry for ver 0x30 tables
Rework to fix memory leak
v3: More error checks
Simplify check for invalid entries
Signed-off-by: Karol Herbst <karolherbst at gmail.com>
---
.../include/nvkm/subdev/bios/power_budget.h | 25 +++++
drm/nouveau/nvkm/subdev/bios/Kbuild | 1 +
drm/nouveau/nvkm/subdev/bios/power_budget.c | 125 +++++++++++++++++++++
3 files changed, 151 insertions(+)
create mode 100644 drm/nouveau/include/nvkm/subdev/bios/power_budget.h
create mode 100644 drm/nouveau/nvkm/subdev/bios/power_budget.c
diff --git a/drm/nouveau/include/nvkm/subdev/bios/power_budget.h b/drm/nouveau/include/nvkm/subdev/bios/power_budget.h
new file mode 100644
index 00000000..89fd4a7a
--- /dev/null
+++ b/drm/nouveau/include/nvkm/subdev/bios/power_budget.h
@@ -0,0 +1,25 @@
+#ifndef __NVBIOS_POWER_BUDGET_H__
+#define __NVBIOS_POWER_BUDGET_H__
+
+#include <nvkm/subdev/bios.h>
+
+struct nvbios_power_budget_entry {
+ u32 min_w;
+ u32 avg_w;
+ u32 max_w;
+};
+
+struct nvbios_power_budget {
+ u32 offset;
+ u8 hlen;
+ u8 elen;
+ u8 ecount;
+ u8 cap_entry;
+};
+
+int nvbios_power_budget_header(struct nvkm_bios *,
+ struct nvbios_power_budget *);
+int nvbios_power_budget_entry(struct nvkm_bios *, struct nvbios_power_budget *,
+ u8 idx, struct nvbios_power_budget_entry *);
+
+#endif
diff --git a/drm/nouveau/nvkm/subdev/bios/Kbuild b/drm/nouveau/nvkm/subdev/bios/Kbuild
index be57220a..6b4f1e06 100644
--- a/drm/nouveau/nvkm/subdev/bios/Kbuild
+++ b/drm/nouveau/nvkm/subdev/bios/Kbuild
@@ -19,6 +19,7 @@ nvkm-y += nvkm/subdev/bios/pcir.o
nvkm-y += nvkm/subdev/bios/perf.o
nvkm-y += nvkm/subdev/bios/pll.o
nvkm-y += nvkm/subdev/bios/pmu.o
+nvkm-y += nvkm/subdev/bios/power_budget.o
nvkm-y += nvkm/subdev/bios/ramcfg.o
nvkm-y += nvkm/subdev/bios/rammap.o
nvkm-y += nvkm/subdev/bios/shadow.o
diff --git a/drm/nouveau/nvkm/subdev/bios/power_budget.c b/drm/nouveau/nvkm/subdev/bios/power_budget.c
new file mode 100644
index 00000000..04c69095
--- /dev/null
+++ b/drm/nouveau/nvkm/subdev/bios/power_budget.c
@@ -0,0 +1,125 @@
+/*
+ * Copyright 2016 Karol Herbst
+ *
+ * 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: Karol Herbst
+ */
+#include <subdev/bios.h>
+#include <subdev/bios/bit.h>
+#include <subdev/bios/power_budget.h>
+
+static u32
+nvbios_power_budget_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt,
+ u8 *len)
+{
+ struct bit_entry bit_P;
+ u32 power_budget;
+
+ if (bit_entry(bios, 'P', &bit_P) || bit_P.version != 2 ||
+ bit_P.length < 0x2c)
+ return 0;
+
+ power_budget = nvbios_rd32(bios, bit_P.offset + 0x2c);
+ if (!power_budget)
+ return 0;
+
+ *ver = nvbios_rd08(bios, power_budget);
+ switch (*ver) {
+ case 0x10:
+ case 0x20:
+ case 0x30:
+ *hdr = nvbios_rd08(bios, power_budget + 0x1);
+ *len = nvbios_rd08(bios, power_budget + 0x2);
+ *cnt = nvbios_rd08(bios, power_budget + 0x3);
+ return power_budget;
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+int
+nvbios_power_budget_header(struct nvkm_bios *bios,
+ struct nvbios_power_budget *budget)
+{
+ struct nvkm_subdev *subdev = &bios->subdev;
+ u8 ver, hdr, cnt, len, cap_entry;
+ u32 header;
+
+ if (!bios || !budget)
+ return -EINVAL;
+
+ header = nvbios_power_budget_table(bios, &ver, &hdr, &cnt, &len);
+ if (!header || !cnt)
+ return -ENODEV;
+
+ budget->offset = header;
+ budget->hlen = hdr;
+ budget->elen = len;
+ budget->ecount = cnt;
+
+ switch (ver) {
+ case 0x20:
+ cap_entry = nvbios_rd08(bios, header + 0x9);
+ break;
+ case 0x30:
+ cap_entry = nvbios_rd08(bios, header + 0xa);
+ break;
+ default:
+ cap_entry = 0xff;
+ }
+
+ if (cap_entry >= cnt && cap_entry != 0xff) {
+ nvkm_warn(subdev,
+ "invalid cap_entry in power budget table found\n");
+ budget->cap_entry = 0xff;
+ return -EINVAL;
+ }
+
+ budget->cap_entry = cap_entry;
+ return 0;
+}
+
+int
+nvbios_power_budget_entry(struct nvkm_bios *bios,
+ struct nvbios_power_budget *budget,
+ u8 idx, struct nvbios_power_budget_entry *entry)
+{
+ u32 entry_offset;
+
+ if (!bios || !budget || !budget->offset || idx >= budget->ecount
+ || !entry)
+ return -EINVAL;
+
+ entry_offset = budget->offset + budget->hlen + idx * budget->elen;
+
+ if (budget->elen >= 0xe) {
+ entry->min_w = nvbios_rd32(bios, entry_offset + 0x2);
+ entry->avg_w = nvbios_rd32(bios, entry_offset + 0x6);
+ entry->max_w = nvbios_rd32(bios, entry_offset + 0xa);
+ } else {
+ entry->min_w = 0;
+ entry->max_w = nvbios_rd32(bios, entry_offset + 0x2);
+ entry->avg_w = entry->max_w;
+ }
+
+ return 0;
+}
--
2.11.0.rc2
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