UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

crypto: qat - detect PFVF collision after ACK 

Detect a PFVF collision between the local and the remote function by
checking if the message on the PFVF CSR has been overwritten.
This is done after the remote function confirms that the message has
been received, by clearing the interrupt bit, or the maximum number of
attempts (ADF_IOV_MSG_ACK_MAX_RETRY) to check the CSR has been exceeded.

Fixes: ed8ccaef52 ("crypto: qat - Add support for SRIOV")
Signed-off-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Co-developed-by: Marco Chiappero <marco.chiappero@intel.com>
Signed-off-by: Marco Chiappero <marco.chiappero@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Giovanni Cabiddu 2021-09-28 12:44:29 +01:00 committed by Herbert Xu
parent cfd6fb45cf
commit 9b768e8a39
1 changed files with 7 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/crypto/qat/qat_common/adf_pf2vf_msg.c
View File

@ -156,6 +156,13 @@ static int __adf_iov_putmsg(struct adf_accel_dev *accel_dev, u32 msg, u8 vf_nr)
val = ADF_CSR_RD(pmisc_bar_addr, pf2vf_offset);
} while ((val & int_bit) && (count++ < ADF_IOV_MSG_ACK_MAX_RETRY));
if (val != msg) {
dev_dbg(&GET_DEV(accel_dev),
"Collision - PFVF CSR overwritten by remote function\n");
ret = -EIO;
goto out;
}
if (val & int_bit) {
dev_dbg(&GET_DEV(accel_dev), "ACK not received from remote\n");
val &= ~int_bit;