From 5bd8d53f6fa53eab5433698d1362dae2aa53c1cc Mon Sep 17 00:00:00 2001 From: Victor Zhao Date: Tue, 14 Jun 2022 10:48:11 +0800 Subject: drm/amdgpu: add debugfs amdgpu_reset_level Introduce amdgpu_reset_level debugfs in order to help debug and test specific type of reset. Also helps blocking unwanted type of resets. By default, mode2 reset will not be enabled v2: make this debugfs in adev and use debugfs_create_u32 Signed-off-by: Victor Zhao Acked-by: Andrey Grodzovsky Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c index cb00c7d6f50b..4e54569fa223 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c @@ -1786,6 +1786,8 @@ int amdgpu_debugfs_init(struct amdgpu_device *adev) return PTR_ERR(ent); } + debugfs_create_u32("amdgpu_reset_level", 0600, root, &adev->amdgpu_reset_level_mask); + /* Register debugfs entries for amdgpu_ttm */ amdgpu_ttm_debugfs_init(adev); amdgpu_debugfs_pm_init(adev); -- cgit From 0ad7347a64ac4baec1786810709eebedc5f823d5 Mon Sep 17 00:00:00 2001 From: André Almeida Date: Wed, 10 Aug 2022 20:28:55 -0300 Subject: drm/amd: Add detailed GFXOFF stats to debugfs MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Add debugfs interface to log GFXOFF statistics: - Read amdgpu_gfxoff_count to get the total GFXOFF entry count at the time of query since system power-up - Write 1 to amdgpu_gfxoff_residency to start logging, and 0 to stop. Read it to get average GFXOFF residency % multiplied by 100 during the last logging interval. Both features are designed to be keep the values persistent between suspends. Signed-off-by: André Almeida Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c | 168 ++++++++++++++++++++++++++++ 1 file changed, 168 insertions(+) (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c index 4e54569fa223..6066aebf491c 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c @@ -1042,6 +1042,157 @@ err: return r; } +/** + * amdgpu_debugfs_gfxoff_residency_read - Read GFXOFF residency + * + * @f: open file handle + * @buf: User buffer to store read data in + * @size: Number of bytes to read + * @pos: Offset to seek to + * + * Read the last residency value logged. It doesn't auto update, one needs to + * stop logging before getting the current value. + */ +static ssize_t amdgpu_debugfs_gfxoff_residency_read(struct file *f, char __user *buf, + size_t size, loff_t *pos) +{ + struct amdgpu_device *adev = file_inode(f)->i_private; + ssize_t result = 0; + int r; + + if (size & 0x3 || *pos & 0x3) + return -EINVAL; + + r = pm_runtime_get_sync(adev_to_drm(adev)->dev); + if (r < 0) { + pm_runtime_put_autosuspend(adev_to_drm(adev)->dev); + return r; + } + + while (size) { + uint32_t value; + + r = amdgpu_get_gfx_off_residency(adev, &value); + if (r) + goto out; + + r = put_user(value, (uint32_t *)buf); + if (r) + goto out; + + result += 4; + buf += 4; + *pos += 4; + size -= 4; + } + + r = result; +out: + pm_runtime_mark_last_busy(adev_to_drm(adev)->dev); + pm_runtime_put_autosuspend(adev_to_drm(adev)->dev); + + return r; +} + +/** + * amdgpu_debugfs_gfxoff_residency_write - Log GFXOFF Residency + * + * @f: open file handle + * @buf: User buffer to write data from + * @size: Number of bytes to write + * @pos: Offset to seek to + * + * Write a 32-bit non-zero to start logging; write a 32-bit zero to stop + */ +static ssize_t amdgpu_debugfs_gfxoff_residency_write(struct file *f, const char __user *buf, + size_t size, loff_t *pos) +{ + struct amdgpu_device *adev = file_inode(f)->i_private; + ssize_t result = 0; + int r; + + if (size & 0x3 || *pos & 0x3) + return -EINVAL; + + r = pm_runtime_get_sync(adev_to_drm(adev)->dev); + if (r < 0) { + pm_runtime_put_autosuspend(adev_to_drm(adev)->dev); + return r; + } + + while (size) { + u32 value; + + r = get_user(value, (uint32_t *)buf); + if (r) + goto out; + + amdgpu_set_gfx_off_residency(adev, value ? true : false); + + result += 4; + buf += 4; + *pos += 4; + size -= 4; + } + + r = result; +out: + pm_runtime_mark_last_busy(adev_to_drm(adev)->dev); + pm_runtime_put_autosuspend(adev_to_drm(adev)->dev); + + return r; +} + + +/** + * amdgpu_debugfs_gfxoff_count_read - Read GFXOFF entry count + * + * @f: open file handle + * @buf: User buffer to store read data in + * @size: Number of bytes to read + * @pos: Offset to seek to + */ +static ssize_t amdgpu_debugfs_gfxoff_count_read(struct file *f, char __user *buf, + size_t size, loff_t *pos) +{ + struct amdgpu_device *adev = file_inode(f)->i_private; + ssize_t result = 0; + int r; + + if (size & 0x3 || *pos & 0x3) + return -EINVAL; + + r = pm_runtime_get_sync(adev_to_drm(adev)->dev); + if (r < 0) { + pm_runtime_put_autosuspend(adev_to_drm(adev)->dev); + return r; + } + + while (size) { + u64 value = 0; + + r = amdgpu_get_gfx_off_entrycount(adev, &value); + if (r) + goto out; + + r = put_user(value, (u64 *)buf); + if (r) + goto out; + + result += 4; + buf += 4; + *pos += 4; + size -= 4; + } + + r = result; +out: + pm_runtime_mark_last_busy(adev_to_drm(adev)->dev); + pm_runtime_put_autosuspend(adev_to_drm(adev)->dev); + + return r; +} + /** * amdgpu_debugfs_gfxoff_write - Enable/disable GFXOFF * @@ -1249,6 +1400,19 @@ static const struct file_operations amdgpu_debugfs_gfxoff_status_fops = { .llseek = default_llseek }; +static const struct file_operations amdgpu_debugfs_gfxoff_count_fops = { + .owner = THIS_MODULE, + .read = amdgpu_debugfs_gfxoff_count_read, + .llseek = default_llseek +}; + +static const struct file_operations amdgpu_debugfs_gfxoff_residency_fops = { + .owner = THIS_MODULE, + .read = amdgpu_debugfs_gfxoff_residency_read, + .write = amdgpu_debugfs_gfxoff_residency_write, + .llseek = default_llseek +}; + static const struct file_operations *debugfs_regs[] = { &amdgpu_debugfs_regs_fops, &amdgpu_debugfs_regs2_fops, @@ -1261,6 +1425,8 @@ static const struct file_operations *debugfs_regs[] = { &amdgpu_debugfs_gpr_fops, &amdgpu_debugfs_gfxoff_fops, &amdgpu_debugfs_gfxoff_status_fops, + &amdgpu_debugfs_gfxoff_count_fops, + &amdgpu_debugfs_gfxoff_residency_fops, }; static const char *debugfs_regs_names[] = { @@ -1275,6 +1441,8 @@ static const char *debugfs_regs_names[] = { "amdgpu_gpr", "amdgpu_gfxoff", "amdgpu_gfxoff_status", + "amdgpu_gfxoff_count", + "amdgpu_gfxoff_residency", }; /** -- cgit