Hello Bean, > >Usage: > >1) To read current configuration descriptor with index X > > (where index X can be 0/1/2/3) : > > cat /config/<device_name>/ufs_config_desc_X > > > >2) To write configuration descriptor with index X : > > echo <config_desc_buf> > /config/<device_name>/ufs_config_desc_X > > > > > I tested on my platform and got these error: > > cat /sys/kernel/config/ff3b0000.ufs/ufs_config_desc_0 > 0x90 0x1 0x0 0x1 0x0 0x1 0x7f 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 > 0x1 0x1 0x0 0x3 0x0 0x0 0x0 0x2 0x1 0xc 0x2 0x0 0x0 0x0 0x0 0x0 > 0x1 0x2 0x0 0x3 0x0 0x0 0x0 0x2 0x1 0xc 0x2 0x0 0x0 0x0 0x0 0x0 > 0x1 0x0 0x0 0x3 0x0 0x0 0x0 0x4 0x1 0xc 0x2 0x0 0x0 0x0 0x0 0x0 > 0x1 0x0 0x0 0x0 0x0 0x0 0x1d 0xc7 0x1 0xc 0x2 0x0 0x0 0x0 0x0 0x0 > 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0xc 0x0 0x0 0x0 0x0 0x0 0x0 > 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0xc 0x0 0x0 0x0 0x0 0x0 0x0 > 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0xc 0x0 0x0 0x0 0x0 0x0 0x0 > 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0xc 0x0 0x0 0x0 0x0 0x0 0x0 > > cat /sys/kernel/config/ff3b0000.ufs/ufs_config_desc_1 > [ 63.631734] ufshcd-hisi ff3b0000.ufs: __ufshcd_query_descriptor: opcode > 0x01 for idn 1 failed, index 1, err = 252 > [ 63.643059] ufshcd-hisi ff3b0000.ufs: __ufshcd_query_descriptor: opcode > 0x01 for idn 1 failed, index 1, err = 252 > [ 63.653602] ufshcd-hisi ff3b0000.ufs: __ufshcd_query_descriptor: opcode > 0x01 for idn 1 failed, index 1, err = 252 This actually does not imply an error, just that your device is currently configured With 4 luns (2 of them are bootluns), as config_desc_0 shows. config_desc_0 also indicate that there are no other config descriptors - the 3rd byte of its header is 0x0. It would be interesting to test however, a write operation with index 0x1 to this device. The current code is trying to override the config descriptor with the new configuration - That is, it reads it first, and then re-writes it. I would expect that this will fail if the you are trying to read descriptor with an index that does not exist. Thanks, Avri > cat /sys/kernel/config/ff3b0000.ufs/ufs_config_desc_2 > [ 77.946097] ufshcd-hisi ff3b0000.ufs: __ufshcd_query_descriptor: opcode > 0x01 for idn 1 failed, index 2, err = 252 > [ 77.957212] ufshcd-hisi ff3b0000.ufs: __ufshcd_query_descriptor: opcode > 0x01 for idn 1 failed, index 2, err = 252 > [ 77.968534] ufshcd-hisi ff3b0000.ufs: __ufshcd_query_descriptor: opcode > 0x01 for idn 1 failed, index 2, err = 252 > cat /sys/kernel/config/ff3b0000.ufs/ufs_config_desc_3 > [ 82.237656] ufshcd-hisi ff3b0000.ufs: __ufshcd_query_descriptor: opcode > 0x01 for idn 1 failed, index 3, err = 252 > [ 82.248374] ufshcd-hisi ff3b0000.ufs: __ufshcd_query_descriptor: opcode > 0x01 for idn 1 failed, index 3, err = 252 > [ 82.259117] ufshcd-hisi ff3b0000.ufs: __ufshcd_query_descriptor: opcode > 0x01 for idn 1 failed, index 3, err = 252
