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linux/drivers/gpu/drm/v3d/v3d_debugfs.c
Eric Anholt 2f20fa8d12 drm/v3d: Skip debugfs dumping GCA on platforms without GCA. 
Fixes an oops reading this debugfs entry on BCM7278.

Signed-off-by: Eric Anholt <eric@anholt.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20180928232126.4332-4-eric@anholt.net
Fixes: 57692c94dc ("drm/v3d: Introduce a new DRM driver for Broadcom V3D V3.x+")
Cc: <stable@vger.kernel.org>
Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com>
2018-10-15 13:10:54 -07:00

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// SPDX-License-Identifier: GPL-2.0+
/* Copyright (C) 2014-2018 Broadcom */
#include <linux/circ_buf.h>
#include <linux/ctype.h>
#include <linux/debugfs.h>
#include <linux/pm_runtime.h>
#include <linux/seq_file.h>
#include <drm/drmP.h>
#include "v3d_drv.h"
#include "v3d_regs.h"
#define REGDEF(reg) { reg, #reg }
struct v3d_reg_def {
u32 reg;
const char *name;
};
static const struct v3d_reg_def v3d_hub_reg_defs[] = {
REGDEF(V3D_HUB_AXICFG),
REGDEF(V3D_HUB_UIFCFG),
REGDEF(V3D_HUB_IDENT0),
REGDEF(V3D_HUB_IDENT1),
REGDEF(V3D_HUB_IDENT2),
REGDEF(V3D_HUB_IDENT3),
REGDEF(V3D_HUB_INT_STS),
REGDEF(V3D_HUB_INT_MSK_STS),
};
static const struct v3d_reg_def v3d_gca_reg_defs[] = {
REGDEF(V3D_GCA_SAFE_SHUTDOWN),
REGDEF(V3D_GCA_SAFE_SHUTDOWN_ACK),
};
static const struct v3d_reg_def v3d_core_reg_defs[] = {
REGDEF(V3D_CTL_IDENT0),
REGDEF(V3D_CTL_IDENT1),
REGDEF(V3D_CTL_IDENT2),
REGDEF(V3D_CTL_MISCCFG),
REGDEF(V3D_CTL_INT_STS),
REGDEF(V3D_CTL_INT_MSK_STS),
REGDEF(V3D_CLE_CT0CS),
REGDEF(V3D_CLE_CT0CA),
REGDEF(V3D_CLE_CT0EA),
REGDEF(V3D_CLE_CT1CS),
REGDEF(V3D_CLE_CT1CA),
REGDEF(V3D_CLE_CT1EA),
REGDEF(V3D_PTB_BPCA),
REGDEF(V3D_PTB_BPCS),
REGDEF(V3D_MMU_CTL),
REGDEF(V3D_MMU_VIO_ADDR),
REGDEF(V3D_GMP_STATUS),
REGDEF(V3D_GMP_CFG),
REGDEF(V3D_GMP_VIO_ADDR),
};
static int v3d_v3d_debugfs_regs(struct seq_file *m, void *unused)
{
struct drm_info_node *node = (struct drm_info_node *)m->private;
struct drm_device *dev = node->minor->dev;
struct v3d_dev *v3d = to_v3d_dev(dev);
int i, core;
for (i = 0; i < ARRAY_SIZE(v3d_hub_reg_defs); i++) {
seq_printf(m, "%s (0x%04x): 0x%08x\n",
v3d_hub_reg_defs[i].name, v3d_hub_reg_defs[i].reg,
V3D_READ(v3d_hub_reg_defs[i].reg));
}
if (v3d->ver < 41) {
for (i = 0; i < ARRAY_SIZE(v3d_gca_reg_defs); i++) {
seq_printf(m, "%s (0x%04x): 0x%08x\n",
v3d_gca_reg_defs[i].name,
v3d_gca_reg_defs[i].reg,
V3D_GCA_READ(v3d_gca_reg_defs[i].reg));
}
}
for (core = 0; core < v3d->cores; core++) {
for (i = 0; i < ARRAY_SIZE(v3d_core_reg_defs); i++) {
seq_printf(m, "core %d %s (0x%04x): 0x%08x\n",
core,
v3d_core_reg_defs[i].name,
v3d_core_reg_defs[i].reg,
V3D_CORE_READ(core,
v3d_core_reg_defs[i].reg));
}
}
return 0;
}
static int v3d_v3d_debugfs_ident(struct seq_file *m, void *unused)
{
struct drm_info_node *node = (struct drm_info_node *)m->private;
struct drm_device *dev = node->minor->dev;
struct v3d_dev *v3d = to_v3d_dev(dev);
u32 ident0, ident1, ident2, ident3, cores;
int ret, core;
ret = pm_runtime_get_sync(v3d->dev);
if (ret < 0)
return ret;
ident0 = V3D_READ(V3D_HUB_IDENT0);
ident1 = V3D_READ(V3D_HUB_IDENT1);
ident2 = V3D_READ(V3D_HUB_IDENT2);
ident3 = V3D_READ(V3D_HUB_IDENT3);
cores = V3D_GET_FIELD(ident1, V3D_HUB_IDENT1_NCORES);
seq_printf(m, "Revision: %d.%d.%d.%d\n",
V3D_GET_FIELD(ident1, V3D_HUB_IDENT1_TVER),
V3D_GET_FIELD(ident1, V3D_HUB_IDENT1_REV),
V3D_GET_FIELD(ident3, V3D_HUB_IDENT3_IPREV),
V3D_GET_FIELD(ident3, V3D_HUB_IDENT3_IPIDX));
seq_printf(m, "MMU: %s\n",
(ident2 & V3D_HUB_IDENT2_WITH_MMU) ? "yes" : "no");
seq_printf(m, "TFU: %s\n",
(ident1 & V3D_HUB_IDENT1_WITH_TFU) ? "yes" : "no");
seq_printf(m, "TSY: %s\n",
(ident1 & V3D_HUB_IDENT1_WITH_TSY) ? "yes" : "no");
seq_printf(m, "MSO: %s\n",
(ident1 & V3D_HUB_IDENT1_WITH_MSO) ? "yes" : "no");
seq_printf(m, "L3C: %s (%dkb)\n",
(ident1 & V3D_HUB_IDENT1_WITH_L3C) ? "yes" : "no",
V3D_GET_FIELD(ident2, V3D_HUB_IDENT2_L3C_NKB));
for (core = 0; core < cores; core++) {
u32 misccfg;
u32 nslc, ntmu, qups;
ident0 = V3D_CORE_READ(core, V3D_CTL_IDENT0);
ident1 = V3D_CORE_READ(core, V3D_CTL_IDENT1);
ident2 = V3D_CORE_READ(core, V3D_CTL_IDENT2);
misccfg = V3D_CORE_READ(core, V3D_CTL_MISCCFG);
nslc = V3D_GET_FIELD(ident1, V3D_IDENT1_NSLC);
ntmu = V3D_GET_FIELD(ident1, V3D_IDENT1_NTMU);
qups = V3D_GET_FIELD(ident1, V3D_IDENT1_QUPS);
seq_printf(m, "Core %d:\n", core);
seq_printf(m, " Revision: %d.%d\n",
V3D_GET_FIELD(ident0, V3D_IDENT0_VER),
V3D_GET_FIELD(ident1, V3D_IDENT1_REV));
seq_printf(m, " Slices: %d\n", nslc);
seq_printf(m, " TMUs: %d\n", nslc * ntmu);
seq_printf(m, " QPUs: %d\n", nslc * qups);
seq_printf(m, " Semaphores: %d\n",
V3D_GET_FIELD(ident1, V3D_IDENT1_NSEM));
seq_printf(m, " BCG int: %d\n",
(ident2 & V3D_IDENT2_BCG_INT) != 0);
seq_printf(m, " Override TMU: %d\n",
(misccfg & V3D_MISCCFG_OVRTMUOUT) != 0);
}
pm_runtime_mark_last_busy(v3d->dev);
pm_runtime_put_autosuspend(v3d->dev);
return 0;
}
static int v3d_debugfs_bo_stats(struct seq_file *m, void *unused)
{
struct drm_info_node *node = (struct drm_info_node *)m->private;
struct drm_device *dev = node->minor->dev;
struct v3d_dev *v3d = to_v3d_dev(dev);
mutex_lock(&v3d->bo_lock);
seq_printf(m, "allocated bos: %d\n",
v3d->bo_stats.num_allocated);
seq_printf(m, "allocated bo size (kb): %ld\n",
(long)v3d->bo_stats.pages_allocated << (PAGE_SHIFT - 10));
mutex_unlock(&v3d->bo_lock);
return 0;
}
static int v3d_measure_clock(struct seq_file *m, void *unused)
{
struct drm_info_node *node = (struct drm_info_node *)m->private;
struct drm_device *dev = node->minor->dev;
struct v3d_dev *v3d = to_v3d_dev(dev);
uint32_t cycles;
int core = 0;
int measure_ms = 1000;
if (v3d->ver >= 40) {
V3D_CORE_WRITE(core, V3D_V4_PCTR_0_SRC_0_3,
V3D_SET_FIELD(V3D_PCTR_CYCLE_COUNT,
V3D_PCTR_S0));
V3D_CORE_WRITE(core, V3D_V4_PCTR_0_CLR, 1);
V3D_CORE_WRITE(core, V3D_V4_PCTR_0_EN, 1);
} else {
V3D_CORE_WRITE(core, V3D_V3_PCTR_0_PCTRS0,
V3D_PCTR_CYCLE_COUNT);
V3D_CORE_WRITE(core, V3D_V3_PCTR_0_CLR, 1);
V3D_CORE_WRITE(core, V3D_V3_PCTR_0_EN,
V3D_V3_PCTR_0_EN_ENABLE |
1);
}
msleep(measure_ms);
cycles = V3D_CORE_READ(core, V3D_PCTR_0_PCTR0);
seq_printf(m, "cycles: %d (%d.%d Mhz)\n",
cycles,
cycles / (measure_ms * 1000),
(cycles / (measure_ms * 100)) % 10);
return 0;
}
static const struct drm_info_list v3d_debugfs_list[] = {
{"v3d_ident", v3d_v3d_debugfs_ident, 0},
{"v3d_regs", v3d_v3d_debugfs_regs, 0},
{"measure_clock", v3d_measure_clock, 0},
{"bo_stats", v3d_debugfs_bo_stats, 0},
};
int
v3d_debugfs_init(struct drm_minor *minor)
{
return drm_debugfs_create_files(v3d_debugfs_list,
ARRAY_SIZE(v3d_debugfs_list),
minor->debugfs_root, minor);
}
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