You also seem to be missing a leading parenthesis.
Regards,
Luben
On 2021-04-14 9:58 a.m., Luben Tuikov wrote:
> I'll take a look.
>
> For the time being, you don't need parenthesis around != conditional as &&
> has lower
> priority, i.e. the parenthesis are superfluous.
>
> Regards,
> Luben
>
> On 2021-04-14 4:19 a.m., Clements, John wrote:
>> [AMD Official Use Only - Internal Distribution Only]
>>
>> Thank you Luben for re-organizing this source file and fixing those bugs.
>>
>> Please add back support for decimal input parameter values, maybe something
>> like this:
>> + if (sscanf(str, "%*s 0x%llx", &address) != 1) &&
>> (sscanf(str, "%*s %llu", &address) != 1))
>> + return -EINVAL;
>>
>> My concern is that there are tools out there that use that interface, so I
>> wouldn't want any side effects there.
>>
>> Reviewed-by: John Clements <john.cleme...@amd.com>
>>
>> -----Original Message-----
>> From: Tuikov, Luben <luben.tui...@amd.com>
>> Sent: Monday, April 12, 2021 9:15 AM
>> To: amd-gfx@lists.freedesktop.org
>> Cc: Tuikov, Luben <luben.tui...@amd.com>; Deucher, Alexander
>> <alexander.deuc...@amd.com>; Clements, John <john.cleme...@amd.com>; Zhang,
>> Hawking <hawking.zh...@amd.com>
>> Subject: [PATCH] drm/amdgpu: Fix checking return result of retire page
>>
>> * Remove double-sscanf to scan for %llu and
>> 0x%llx, as that is not going to work--the %llu
>> will consume the "0" in "0x" of your input,
>> and a hex value can never be consumed. And just
>> entering a hex number without leading 0x will
>> either be scanned as a string and not match,
>> or the leading decimal portion is scanned
>> which is not correct. Thus remove the first
>> %llu scan and leave only the %llx scan,
>> removing the leading 0x since %llx can scan
>> either.
>>
>> * Fix logic the check of the result of
>> amdgpu_reserve_page_direct()--it is 0
>> on success, and non-zero on error.
>>
>> * Add bad_page_cnt_threshold to debugfs for
>> reporting purposes only--it usually matches the
>> size of EEPROM but may be different depending on
>> module option. Small other improvements.
>>
>> * Improve kernel-doc for the sysfs interface.
>>
>> Cc: Alexander Deucher <alexander.deuc...@amd.com>
>> Cc: John Clements <john.cleme...@amd.com>
>> Cc: Hawking Zhang <hawking.zh...@amd.com>
>> Signed-off-by: Luben Tuikov <luben.tui...@amd.com>
>> ---
>> drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c | 67 ++++++++++++-------------
>> 1 file changed, 32 insertions(+), 35 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
>> index 0541196ae1ed..c4b94b444b90 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
>> @@ -114,7 +114,7 @@ static int amdgpu_reserve_page_direct(struct
>> amdgpu_device *adev, uint64_t addre
>>
>> if (amdgpu_ras_check_bad_page(adev, address)) {
>> dev_warn(adev->dev,
>> - "RAS WARN: 0x%llx has been marked as bad page!\n",
>> + "RAS WARN: 0x%llx has already been marked as bad
>> page!\n",
>> address);
>> return 0;
>> }
>> @@ -228,11 +228,9 @@ static int amdgpu_ras_debugfs_ctrl_parse_data(struct
>> file *f,
>> return -EINVAL;
>>
>> if (op != -1) {
>> -
>> if (op == 3) {
>> - if (sscanf(str, "%*s %llu", &address) != 1)
>> - if (sscanf(str, "%*s 0x%llx", &address) != 1)
>> - return -EINVAL;
>> + if (sscanf(str, "%*s %llx", &address) != 1)
>> + return -EINVAL;
>>
>> data->op = op;
>> data->inject.address = address;
>> @@ -255,11 +253,9 @@ static int amdgpu_ras_debugfs_ctrl_parse_data(struct
>> file *f,
>> data->op = op;
>>
>> if (op == 2) {
>> - if (sscanf(str, "%*s %*s %*s %u %llu %llu",
>> - &sub_block, &address, &value)
>> != 3)
>> - if (sscanf(str, "%*s %*s %*s 0x%x 0x%llx
>> 0x%llx",
>> - &sub_block, &address,
>> &value) != 3)
>> - return -EINVAL;
>> + if (sscanf(str, "%*s %*s %*s %x %llx %llx",
>> + &sub_block, &address, &value) != 3)
>> + return -EINVAL;
>> data->head.sub_block_index = sub_block;
>> data->inject.address = address;
>> data->inject.value = value;
>> @@ -278,7 +274,7 @@ static int amdgpu_ras_debugfs_ctrl_parse_data(struct
>> file *f,
>> /**
>> * DOC: AMDGPU RAS debugfs control interface
>> *
>> - * It accepts struct ras_debug_if who has two members.
>> + * The control interface accepts struct ras_debug_if which has two members.
>> *
>> * First member: ras_debug_if::head or ras_debug_if::inject.
>> *
>> @@ -303,32 +299,33 @@ static int amdgpu_ras_debugfs_ctrl_parse_data(struct
>> file *f,
>> *
>> * How to use the interface?
>> *
>> - * Programs
>> + * Program
>> *
>> * Copy the struct ras_debug_if in your codes and initialize it.
>> * Write the struct to the control node.
>> *
>> - * Shells
>> + * Shell
>> *
>> * .. code-block:: bash
>> *
>> - * echo op block [error [sub_block address value]] > .../ras/ras_ctrl
>> + * echo "disable <block>" > /sys/kernel/debug/dri/<N>/ras/ras_ctrl
>> + * echo "enable <block> <error>" > /sys/kernel/debug/dri/<N>/ras/ras_ctrl
>> + * echo "inject <block> <error> <sub-block> <address> <value> >
>> /sys/kernel/debug/dri/<N>/ras/ras_ctrl
>> *
>> - * Parameters:
>> + * Where N, is the card which you want to affect.
>> *
>> - * op: disable, enable, inject
>> - * disable: only block is needed
>> - * enable: block and error are needed
>> - * inject: error, address, value are needed
>> - * block: umc, sdma, gfx, .........
>> + * "disable" requires only the block.
>> + * "enable" requires the block and error type.
>> + * "inject" requires the block, error type, address, and value.
>> + * The block is one of: umc, sdma, gfx, etc.
>> * see ras_block_string[] for details
>> - * error: ue, ce
>> - * ue: multi_uncorrectable
>> - * ce: single_correctable
>> - * sub_block:
>> - * sub block index, pass 0 if there is no sub block
>> + * The error type is one of: ue, ce, where,
>> + * ue is multi-uncorrectable
>> + * ce is single-correctable
>> + * The sub-block is a the sub-block index, pass 0 if there is no sub-block.
>> + * The address and value are hexadecimal numbers, leading 0x is optional.
>> *
>> - * here are some examples for bash commands:
>> + * For instance,
>> *
>> * .. code-block:: bash
>> *
>> @@ -336,17 +333,17 @@ static int amdgpu_ras_debugfs_ctrl_parse_data(struct
>> file *f,
>> * echo inject umc ce 0 0 0 > /sys/kernel/debug/dri/0/ras/ras_ctrl
>> * echo disable umc > /sys/kernel/debug/dri/0/ras/ras_ctrl
>> *
>> - * How to check the result?
>> + * How to check the result of the operation?
>> *
>> - * For disable/enable, please check ras features at
>> + * To check disable/enable, see "ras" features at,
>> * /sys/class/drm/card[0/1/2...]/device/ras/features
>> *
>> - * For inject, please check corresponding err count at
>> - * /sys/class/drm/card[0/1/2...]/device/ras/[gfx/sdma/...]_err_count
>> + * To check inject, see the corresponding error count at,
>> + * /sys/class/drm/card[0/1/2...]/device/ras/[gfx|sdma|umc|...]_err_count
>> *
>> * .. note::
>> * Operations are only allowed on blocks which are supported.
>> - * Please check ras mask at /sys/module/amdgpu/parameters/ras_mask
>> + * Check the "ras" mask at /sys/module/amdgpu/parameters/ras_mask
>> * to see which blocks support RAS on a particular asic.
>> *
>> */
>> @@ -367,11 +364,9 @@ static ssize_t amdgpu_ras_debugfs_ctrl_write(struct
>> file *f, const char __user *
>> if (ret)
>> return -EINVAL;
>>
>> - if (data.op == 3)
>> - {
>> + if (data.op == 3) {
>> ret = amdgpu_reserve_page_direct(adev, data.inject.address);
>> -
>> - if (ret)
>> + if (!ret)
>> return size;
>> else
>> return ret;
>> @@ -1269,6 +1264,8 @@ static struct dentry
>> *amdgpu_ras_debugfs_create_ctrl_node(struct amdgpu_device *
>> &amdgpu_ras_debugfs_ctrl_ops);
>> debugfs_create_file("ras_eeprom_reset", S_IWUGO | S_IRUGO, dir, adev,
>> &amdgpu_ras_debugfs_eeprom_ops);
>> + debugfs_create_u32("bad_page_cnt_threshold", S_IRUGO, dir,
>> + &con->bad_page_cnt_threshold);
>>
>> /*
>> * After one uncorrectable error happens, usually GPU recovery will
>>
>
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