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/*
* Copyright © 2016 Intel Corporation
*
* 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 (including the next
* paragraph) 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 AUTHORS OR COPYRIGHT HOLDERS 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.
*
*/
#include "../i915_selftest.h"
static int intel_fw_table_check(const struct intel_forcewake_range *ranges,
unsigned int num_ranges,
bool is_watertight)
{
unsigned int i;
s32 prev;
for (i = 0, prev = -1; i < num_ranges; i++, ranges++) {
/* Check that the table is watertight */
if (is_watertight && (prev + 1) != (s32)ranges->start) {
pr_err("%s: entry[%d]:(%x, %x) is not watertight to previous (%x)\n",
__func__, i, ranges->start, ranges->end, prev);
return -EINVAL;
}
/* Check that the table never goes backwards */
if (prev >= (s32)ranges->start) {
pr_err("%s: entry[%d]:(%x, %x) is less than the previous (%x)\n",
__func__, i, ranges->start, ranges->end, prev);
return -EINVAL;
}
/* Check that the entry is valid */
if (ranges->start >= ranges->end) {
pr_err("%s: entry[%d]:(%x, %x) has negative length\n",
__func__, i, ranges->start, ranges->end);
return -EINVAL;
}
prev = ranges->end;
}
return 0;
}
static int intel_shadow_table_check(void)
{
struct {
const i915_reg_t *regs;
unsigned int size;
} reg_lists[] = {
{ gen8_shadowed_regs, ARRAY_SIZE(gen8_shadowed_regs) },
{ gen11_shadowed_regs, ARRAY_SIZE(gen11_shadowed_regs) },
};
const i915_reg_t *reg;
unsigned int i, j;
s32 prev;
for (j = 0; j < ARRAY_SIZE(reg_lists); ++j) {
reg = reg_lists[j].regs;
for (i = 0, prev = -1; i < reg_lists[j].size; i++, reg++) {
u32 offset = i915_mmio_reg_offset(*reg);
if (prev >= (s32)offset) {
pr_err("%s: entry[%d]:(%x) is before previous (%x)\n",
__func__, i, offset, prev);
return -EINVAL;
}
prev = offset;
}
}
return 0;
}
int intel_uncore_mock_selftests(void)
{
struct {
const struct intel_forcewake_range *ranges;
unsigned int num_ranges;
bool is_watertight;
} fw[] = {
{ __vlv_fw_ranges, ARRAY_SIZE(__vlv_fw_ranges), false },
{ __chv_fw_ranges, ARRAY_SIZE(__chv_fw_ranges), false },
{ __gen9_fw_ranges, ARRAY_SIZE(__gen9_fw_ranges), true },
{ __gen11_fw_ranges, ARRAY_SIZE(__gen11_fw_ranges), true },
};
int err, i;
for (i = 0; i < ARRAY_SIZE(fw); i++) {
err = intel_fw_table_check(fw[i].ranges,
fw[i].num_ranges,
fw[i].is_watertight);
if (err)
return err;
}
err = intel_shadow_table_check();
if (err)
return err;
return 0;
}
static int intel_uncore_check_forcewake_domains(struct drm_i915_private *dev_priv)
{
#define FW_RANGE 0x40000
unsigned long *valid;
u32 offset;
int err;
if (!HAS_FPGA_DBG_UNCLAIMED(dev_priv) &&
!IS_VALLEYVIEW(dev_priv) &&
!IS_CHERRYVIEW(dev_priv))
return 0;
/*
* This test may lockup the machine or cause GPU hangs afterwards.
*/
if (!IS_ENABLED(CONFIG_DRM_I915_SELFTEST_BROKEN))
return 0;
valid = kcalloc(BITS_TO_LONGS(FW_RANGE), sizeof(*valid),
GFP_KERNEL);
if (!valid)
return -ENOMEM;
intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
check_for_unclaimed_mmio(dev_priv);
for (offset = 0; offset < FW_RANGE; offset += 4) {
i915_reg_t reg = { offset };
(void)I915_READ_FW(reg);
if (!check_for_unclaimed_mmio(dev_priv))
set_bit(offset, valid);
}
intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
err = 0;
for_each_set_bit(offset, valid, FW_RANGE) {
i915_reg_t reg = { offset };
iosf_mbi_punit_acquire();
intel_uncore_forcewake_reset(dev_priv);
iosf_mbi_punit_release();
check_for_unclaimed_mmio(dev_priv);
(void)I915_READ(reg);
if (check_for_unclaimed_mmio(dev_priv)) {
pr_err("Unclaimed mmio read to register 0x%04x\n",
offset);
err = -EINVAL;
}
}
kfree(valid);
return err;
}
int intel_uncore_live_selftests(struct drm_i915_private *i915)
{
int err;
/* Confirm the table we load is still valid */
err = intel_fw_table_check(i915->uncore.fw_domains_table,
i915->uncore.fw_domains_table_entries,
INTEL_GEN(i915) >= 9);
if (err)
return err;
err = intel_uncore_check_forcewake_domains(i915);
if (err)
return err;
return 0;
}
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