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crypto: qat - disregard spurious PFVF interrupts 

Upon receiving a PFVF message, check if the interrupt bit is set in the
message. If it is not, that means that the interrupt was probably
triggered by a collision. In this case, disregard the message and
re-enable the interrupts.

Fixes: ed8ccaef52 ("crypto: qat - Add support for SRIOV")
Signed-off-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Reviewed-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 12:44:30 +01:00 committed by Herbert Xu
parent 9b768e8a39
commit 18fcba469b
2 changed files with 12 additions and 0 deletions
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6
drivers/crypto/qat/qat_common/adf_pf2vf_msg.c
View File

@ -211,6 +211,11 @@ void adf_vf2pf_req_hndl(struct adf_accel_vf_info *vf_info)
/* Read message from the VF */
msg = ADF_CSR_RD(pmisc_addr, hw_data->get_pf2vf_offset(vf_nr));
if (!(msg & ADF_VF2PF_INT)) {
dev_info(&GET_DEV(accel_dev),
"Spurious VF2PF interrupt, msg %X. Ignored\n", msg);
goto out;
}
/* To ACK, clear the VF2PFINT bit */
msg &= ~ADF_VF2PF_INT;
@ -294,6 +299,7 @@ void adf_vf2pf_req_hndl(struct adf_accel_vf_info *vf_info)
if (resp && adf_iov_putmsg(accel_dev, resp, vf_nr))
dev_err(&GET_DEV(accel_dev), "Failed to send response to VF\n");
out:
/* re-enable interrupt on PF from this VF */
adf_enable_vf2pf_interrupts(accel_dev, (1 << vf_nr));

6
drivers/crypto/qat/qat_common/adf_vf_isr.c
View File

@ -96,6 +96,11 @@ static void adf_pf2vf_bh_handler(void *data)
/* Read the message from PF */
msg = ADF_CSR_RD(pmisc_bar_addr, hw_data->get_pf2vf_offset(0));
if (!(msg & ADF_PF2VF_INT)) {
dev_info(&GET_DEV(accel_dev),
"Spurious PF2VF interrupt, msg %X. Ignored\n", msg);
goto out;
}
if (!(msg & ADF_PF2VF_MSGORIGIN_SYSTEM))
/* Ignore legacy non-system (non-kernel) PF2VF messages */
@ -144,6 +149,7 @@ static void adf_pf2vf_bh_handler(void *data)
msg &= ~ADF_PF2VF_INT;
ADF_CSR_WR(pmisc_bar_addr, hw_data->get_pf2vf_offset(0), msg);
out:
/* Re-enable PF2VF interrupts */
adf_enable_pf2vf_interrupts(accel_dev);
return;