From: Weili Qian qianweili@huawei.com
mainline inclusion from mainline-master commit 38cd3968bf284929162665b002891de5c60d027a category: feature bugzilla: 173981 CVE: NA
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...
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Kunpeng930 hardware supports PF/VF communications. When the device is reset, PF can send message to VF to stop function and restart function.
This patch adjusts the reset interface to support sending message through PF/VF communication.
Signed-off-by: Weili Qian qianweili@huawei.com Signed-off-by: Herbert Xu herbert@gondor.apana.org.au Signed-off-by: Mingqiang Ling lingmingqiang@huawei.com Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- drivers/crypto/hisilicon/qm.c | 140 +++++++++++++++++++++------------- 1 file changed, 89 insertions(+), 51 deletions(-)
diff --git a/drivers/crypto/hisilicon/qm.c b/drivers/crypto/hisilicon/qm.c index 7c1f8ab28f99..4af0650d4b18 100644 --- a/drivers/crypto/hisilicon/qm.c +++ b/drivers/crypto/hisilicon/qm.c @@ -1796,6 +1796,11 @@ static int qm_check_dev_error(struct hisi_qm *qm) (dev_val & (~qm->err_info.dev_ce_mask)); }
+static int qm_wait_vf_prepare_finish(struct hisi_qm *qm) +{ + return 0; +} + static int qm_stop_qp(struct hisi_qp *qp) { return qm_mb(qp->qm, QM_MB_CMD_STOP_QP, 0, qp->qp_id, 0); @@ -3806,14 +3811,27 @@ static int qm_vf_reset_prepare(struct hisi_qm *qm, return ret; }
-static int qm_reset_prepare_ready(struct hisi_qm *qm) +static int qm_try_stop_vfs(struct hisi_qm *qm, enum qm_stop_reason stop_reason) { struct pci_dev *pdev = qm->pdev; - struct hisi_qm *pf_qm = pci_get_drvdata(pci_physfn(pdev)); + int ret; + + if (!qm->vfs_num) + return 0; + + ret = qm_vf_reset_prepare(qm, stop_reason); + if (ret) + pci_err(pdev, "failed to prepare reset, ret = %d.\n", ret); + + return ret; +} + +static int qm_wait_reset_finish(struct hisi_qm *qm) +{ int delay = 0;
/* All reset requests need to be queued for processing */ - while (test_and_set_bit(QM_RESETTING, &pf_qm->misc_ctl)) { + while (test_and_set_bit(QM_RESETTING, &qm->misc_ctl)) { msleep(++delay); if (delay > QM_RESET_WAIT_TIMEOUT) return -EBUSY; @@ -3822,6 +3840,22 @@ static int qm_reset_prepare_ready(struct hisi_qm *qm) return 0; }
+static int qm_reset_prepare_ready(struct hisi_qm *qm) +{ + struct pci_dev *pdev = qm->pdev; + struct hisi_qm *pf_qm = pci_get_drvdata(pci_physfn(pdev)); + + return qm_wait_reset_finish(pf_qm); +} + +static void qm_reset_bit_clear(struct hisi_qm *qm) +{ + struct pci_dev *pdev = qm->pdev; + struct hisi_qm *pf_qm = pci_get_drvdata(pci_physfn(pdev)); + + clear_bit(QM_RESETTING, &pf_qm->misc_ctl); +} + static int qm_controller_reset_prepare(struct hisi_qm *qm) { struct pci_dev *pdev = qm->pdev; @@ -3833,22 +3867,21 @@ static int qm_controller_reset_prepare(struct hisi_qm *qm) return ret; }
- if (qm->vfs_num) { - ret = qm_vf_reset_prepare(qm, QM_SOFT_RESET); - if (ret) { - pci_err(pdev, "Fails to stop VFs!\n"); - clear_bit(QM_RESETTING, &qm->misc_ctl); - return ret; - } - } + ret = qm_try_stop_vfs(qm, QM_SOFT_RESET); + if (ret) + pci_err(pdev, "failed to stop vfs by pf in soft reset.\n");
ret = hisi_qm_stop(qm, QM_SOFT_RESET); if (ret) { pci_err(pdev, "Fails to stop QM!\n"); - clear_bit(QM_RESETTING, &qm->misc_ctl); + qm_reset_bit_clear(qm); return ret; }
+ ret = qm_wait_vf_prepare_finish(qm); + if (ret) + pci_err(pdev, "failed to stop by vfs in soft reset!\n"); + clear_bit(QM_RST_SCHED, &qm->misc_ctl);
return 0; @@ -3983,6 +4016,27 @@ static int qm_vf_reset_done(struct hisi_qm *qm) return ret; }
+static int qm_try_start_vfs(struct hisi_qm *qm) +{ + struct pci_dev *pdev = qm->pdev; + int ret; + + if (!qm->vfs_num) + return 0; + + ret = qm_vf_q_assign(qm, qm->vfs_num); + if (ret) { + pci_err(pdev, "failed to assign VFs, ret = %d.\n", ret); + return ret; + } + + ret = qm_vf_reset_done(qm); + if (ret) + pci_warn(pdev, "failed to start vfs, ret = %d.\n", ret); + + return ret; +} + static int qm_dev_hw_init(struct hisi_qm *qm) { return qm->err_ini->hw_init(qm); @@ -4082,23 +4136,17 @@ static int qm_controller_reset_done(struct hisi_qm *qm) return ret; }
- if (qm->vfs_num) { - ret = qm_vf_q_assign(qm, qm->vfs_num); - if (ret) { - pci_err(pdev, "Failed to assign queue!\n"); - return ret; - } - } + ret = qm_try_start_vfs(qm); + if (ret) + pci_err(pdev, "failed to start vfs by pf in soft reset.\n");
- ret = qm_vf_reset_done(qm); - if (ret) { - pci_err(pdev, "Failed to start VFs!\n"); - return -EPERM; - } + ret = qm_wait_vf_prepare_finish(qm); + if (ret) + pci_err(pdev, "failed to start by vfs in soft reset!\n");
qm_restart_done(qm);
- clear_bit(QM_RESETTING, &qm->misc_ctl); + qm_reset_bit_clear(qm);
return 0; } @@ -4119,13 +4167,13 @@ static int qm_controller_reset(struct hisi_qm *qm) ret = qm_soft_reset(qm); if (ret) { pci_err(pdev, "Controller reset failed (%d)\n", ret); - clear_bit(QM_RESETTING, &qm->misc_ctl); + qm_reset_bit_clear(qm); return ret; }
ret = qm_controller_reset_done(qm); if (ret) { - clear_bit(QM_RESETTING, &qm->misc_ctl); + qm_reset_bit_clear(qm); return ret; }
@@ -4187,14 +4235,9 @@ void hisi_qm_reset_prepare(struct pci_dev *pdev) return; }
- if (qm->vfs_num) { - ret = qm_vf_reset_prepare(qm, QM_FLR); - if (ret) { - pci_err(pdev, "Failed to prepare reset, ret = %d.\n", - ret); - return; - } - } + ret = qm_try_stop_vfs(qm, QM_SOFT_RESET); + if (ret) + pci_err(pdev, "failed to stop vfs by pf in FLR.\n");
ret = hisi_qm_stop(qm, QM_FLR); if (ret) { @@ -4202,6 +4245,10 @@ void hisi_qm_reset_prepare(struct pci_dev *pdev) return; }
+ ret = qm_wait_vf_prepare_finish(qm); + if (ret) + pci_err(pdev, "failed to stop by vfs in FLR!\n"); + pci_info(pdev, "FLR resetting...\n"); } EXPORT_SYMBOL_GPL(hisi_qm_reset_prepare); @@ -4243,28 +4290,19 @@ void hisi_qm_reset_done(struct pci_dev *pdev) goto flr_done; }
- if (qm->fun_type == QM_HW_PF) { - if (!qm->vfs_num) - goto flr_done; - - ret = qm_vf_q_assign(qm, qm->vfs_num); - if (ret) { - pci_err(pdev, "Failed to assign VFs, ret = %d.\n", ret); - goto flr_done; - } + ret = qm_try_start_vfs(qm); + if (ret) + pci_err(pdev, "failed to start vfs by pf in FLR.\n");
- ret = qm_vf_reset_done(qm); - if (ret) { - pci_err(pdev, "Failed to start VFs, ret = %d.\n", ret); - goto flr_done; - } - } + ret = qm_wait_vf_prepare_finish(qm); + if (ret) + pci_err(pdev, "failed to start by vfs in FLR!\n");
flr_done: if (qm_flr_reset_complete(pdev)) pci_info(pdev, "FLR reset complete\n");
- clear_bit(QM_RESETTING, &pf_qm->misc_ctl); + qm_reset_bit_clear(qm); } EXPORT_SYMBOL_GPL(hisi_qm_reset_done);