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path: root/drivers/crypto/hisilicon/qm.c
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Diffstat (limited to 'drivers/crypto/hisilicon/qm.c')
-rw-r--r--drivers/crypto/hisilicon/qm.c237
1 files changed, 198 insertions, 39 deletions
diff --git a/drivers/crypto/hisilicon/qm.c b/drivers/crypto/hisilicon/qm.c
index 6527c53b073f..530f23116d7c 100644
--- a/drivers/crypto/hisilicon/qm.c
+++ b/drivers/crypto/hisilicon/qm.c
@@ -180,7 +180,10 @@
#define QM_DBG_TMP_BUF_LEN 22
#define QM_PCI_COMMAND_INVALID ~0
+#define WAIT_PERIOD 20
+#define REMOVE_WAIT_DELAY 10
#define QM_SQE_ADDR_MASK GENMASK(7, 0)
+#define QM_EQ_DEPTH (1024 * 2)
#define QM_MK_CQC_DW3_V1(hop_num, pg_sz, buf_sz, cqe_sz) \
(((hop_num) << QM_CQ_HOP_NUM_SHIFT) | \
@@ -652,7 +655,7 @@ static void qm_work_process(struct work_struct *work)
qp = qm_to_hisi_qp(qm, eqe);
qm_poll_qp(qp, qm);
- if (qm->status.eq_head == QM_Q_DEPTH - 1) {
+ if (qm->status.eq_head == QM_EQ_DEPTH - 1) {
qm->status.eqc_phase = !qm->status.eqc_phase;
eqe = qm->eqe;
qm->status.eq_head = 0;
@@ -661,7 +664,7 @@ static void qm_work_process(struct work_struct *work)
qm->status.eq_head++;
}
- if (eqe_num == QM_Q_DEPTH / 2 - 1) {
+ if (eqe_num == QM_EQ_DEPTH / 2 - 1) {
eqe_num = 0;
qm_db(qm, 0, QM_DOORBELL_CMD_EQ, qm->status.eq_head, 0);
}
@@ -754,7 +757,7 @@ static void qm_init_qp_status(struct hisi_qp *qp)
qp_status->sq_tail = 0;
qp_status->cq_head = 0;
qp_status->cqc_phase = true;
- atomic_set(&qp_status->flags, 0);
+ atomic_set(&qp_status->used, 0);
}
static void qm_vft_data_cfg(struct hisi_qm *qm, enum vft_type type, u32 base,
@@ -1046,17 +1049,7 @@ static int qm_regs_show(struct seq_file *s, void *unused)
return 0;
}
-static int qm_regs_open(struct inode *inode, struct file *file)
-{
- return single_open(file, qm_regs_show, inode->i_private);
-}
-
-static const struct file_operations qm_regs_fops = {
- .owner = THIS_MODULE,
- .open = qm_regs_open,
- .read = seq_read,
- .release = single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(qm_regs);
static ssize_t qm_cmd_read(struct file *filp, char __user *buffer,
size_t count, loff_t *pos)
@@ -1370,7 +1363,13 @@ static int qm_eq_aeq_dump(struct hisi_qm *qm, const char *s,
return -EINVAL;
ret = kstrtou32(s, 0, &xeqe_id);
- if (ret || xeqe_id >= QM_Q_DEPTH) {
+ if (ret)
+ return -EINVAL;
+
+ if (!strcmp(name, "EQE") && xeqe_id >= QM_EQ_DEPTH) {
+ dev_err(dev, "Please input eqe num (0-%d)", QM_EQ_DEPTH - 1);
+ return -EINVAL;
+ } else if (!strcmp(name, "AEQE") && xeqe_id >= QM_Q_DEPTH) {
dev_err(dev, "Please input aeqe num (0-%d)", QM_Q_DEPTH - 1);
return -EINVAL;
}
@@ -1420,17 +1419,18 @@ static int qm_dbg_help(struct hisi_qm *qm, char *s)
static int qm_cmd_write_dump(struct hisi_qm *qm, const char *cmd_buf)
{
struct device *dev = &qm->pdev->dev;
- char *presult, *s;
+ char *presult, *s, *s_tmp;
int ret;
s = kstrdup(cmd_buf, GFP_KERNEL);
if (!s)
return -ENOMEM;
+ s_tmp = s;
presult = strsep(&s, " ");
if (!presult) {
- kfree(s);
- return -EINVAL;
+ ret = -EINVAL;
+ goto err_buffer_free;
}
if (!strcmp(presult, "sqc"))
@@ -1459,7 +1459,8 @@ static int qm_cmd_write_dump(struct hisi_qm *qm, const char *cmd_buf)
if (ret)
dev_info(dev, "Please echo help\n");
- kfree(s);
+err_buffer_free:
+ kfree(s_tmp);
return ret;
}
@@ -1644,7 +1645,7 @@ static void *qm_get_avail_sqe(struct hisi_qp *qp)
struct hisi_qp_status *qp_status = &qp->qp_status;
u16 sq_tail = qp_status->sq_tail;
- if (unlikely(atomic_read(&qp->qp_status.used) == QM_Q_DEPTH))
+ if (unlikely(atomic_read(&qp->qp_status.used) == QM_Q_DEPTH - 1))
return NULL;
return qp->sqe + sq_tail * qp->qm->sqe_size;
@@ -1981,7 +1982,7 @@ int hisi_qp_send(struct hisi_qp *qp, const void *msg)
if (unlikely(atomic_read(&qp->qp_status.flags) == QP_STOP ||
atomic_read(&qp->qm->status.flags) == QM_STOP ||
qp->is_resetting)) {
- dev_info(&qp->qm->pdev->dev, "QP is stopped or resetting\n");
+ dev_info_ratelimited(&qp->qm->pdev->dev, "QP is stopped or resetting\n");
return -EAGAIN;
}
@@ -2215,6 +2216,82 @@ static int qm_alloc_uacce(struct hisi_qm *qm)
}
/**
+ * qm_frozen() - Try to froze QM to cut continuous queue request. If
+ * there is user on the QM, return failure without doing anything.
+ * @qm: The qm needed to be fronzen.
+ *
+ * This function frozes QM, then we can do SRIOV disabling.
+ */
+static int qm_frozen(struct hisi_qm *qm)
+{
+ down_write(&qm->qps_lock);
+
+ if (qm->is_frozen) {
+ up_write(&qm->qps_lock);
+ return 0;
+ }
+
+ if (!qm->qp_in_used) {
+ qm->qp_in_used = qm->qp_num;
+ qm->is_frozen = true;
+ up_write(&qm->qps_lock);
+ return 0;
+ }
+
+ up_write(&qm->qps_lock);
+
+ return -EBUSY;
+}
+
+static int qm_try_frozen_vfs(struct pci_dev *pdev,
+ struct hisi_qm_list *qm_list)
+{
+ struct hisi_qm *qm, *vf_qm;
+ struct pci_dev *dev;
+ int ret = 0;
+
+ if (!qm_list || !pdev)
+ return -EINVAL;
+
+ /* Try to frozen all the VFs as disable SRIOV */
+ mutex_lock(&qm_list->lock);
+ list_for_each_entry(qm, &qm_list->list, list) {
+ dev = qm->pdev;
+ if (dev == pdev)
+ continue;
+ if (pci_physfn(dev) == pdev) {
+ vf_qm = pci_get_drvdata(dev);
+ ret = qm_frozen(vf_qm);
+ if (ret)
+ goto frozen_fail;
+ }
+ }
+
+frozen_fail:
+ mutex_unlock(&qm_list->lock);
+
+ return ret;
+}
+
+/**
+ * hisi_qm_wait_task_finish() - Wait until the task is finished
+ * when removing the driver.
+ * @qm: The qm needed to wait for the task to finish.
+ * @qm_list: The list of all available devices.
+ */
+void hisi_qm_wait_task_finish(struct hisi_qm *qm, struct hisi_qm_list *qm_list)
+{
+ while (qm_frozen(qm) ||
+ ((qm->fun_type == QM_HW_PF) &&
+ qm_try_frozen_vfs(qm->pdev, qm_list))) {
+ msleep(WAIT_PERIOD);
+ }
+
+ udelay(REMOVE_WAIT_DELAY);
+}
+EXPORT_SYMBOL_GPL(hisi_qm_wait_task_finish);
+
+/**
* hisi_qm_get_free_qp_num() - Get free number of qp in qm.
* @qm: The qm which want to get free qp.
*
@@ -2282,7 +2359,7 @@ static int hisi_qm_memory_init(struct hisi_qm *qm)
} while (0)
idr_init(&qm->qp_idr);
- qm->qdma.size = QMC_ALIGN(sizeof(struct qm_eqe) * QM_Q_DEPTH) +
+ qm->qdma.size = QMC_ALIGN(sizeof(struct qm_eqe) * QM_EQ_DEPTH) +
QMC_ALIGN(sizeof(struct qm_aeqe) * QM_Q_DEPTH) +
QMC_ALIGN(sizeof(struct qm_sqc) * qm->qp_num) +
QMC_ALIGN(sizeof(struct qm_cqc) * qm->qp_num);
@@ -2292,7 +2369,7 @@ static int hisi_qm_memory_init(struct hisi_qm *qm)
if (!qm->qdma.va)
return -ENOMEM;
- QM_INIT_BUF(qm, eqe, QM_Q_DEPTH);
+ QM_INIT_BUF(qm, eqe, QM_EQ_DEPTH);
QM_INIT_BUF(qm, aeqe, QM_Q_DEPTH);
QM_INIT_BUF(qm, sqc, qm->qp_num);
QM_INIT_BUF(qm, cqc, qm->qp_num);
@@ -2338,6 +2415,7 @@ static void hisi_qm_pre_init(struct hisi_qm *qm)
mutex_init(&qm->mailbox_lock);
init_rwsem(&qm->qps_lock);
qm->qp_in_used = 0;
+ qm->is_frozen = false;
}
/**
@@ -2462,7 +2540,7 @@ static int qm_eq_ctx_cfg(struct hisi_qm *qm)
eqc->base_h = cpu_to_le32(upper_32_bits(qm->eqe_dma));
if (qm->ver == QM_HW_V1)
eqc->dw3 = cpu_to_le32(QM_EQE_AEQE_SIZE);
- eqc->dw6 = cpu_to_le32((QM_Q_DEPTH - 1) | (1 << QM_EQC_PHASE_SHIFT));
+ eqc->dw6 = cpu_to_le32((QM_EQ_DEPTH - 1) | (1 << QM_EQC_PHASE_SHIFT));
ret = qm_mb(qm, QM_MB_CMD_EQC, eqc_dma, 0, 0);
dma_unmap_single(dev, eqc_dma, sizeof(struct qm_eqc), DMA_TO_DEVICE);
kfree(eqc);
@@ -2633,18 +2711,20 @@ static void qm_clear_queues(struct hisi_qm *qm)
/**
* hisi_qm_stop() - Stop a qm.
* @qm: The qm which will be stopped.
+ * @r: The reason to stop qm.
*
* This function stops qm and its qps, then qm can not accept request.
* Related resources are not released at this state, we can use hisi_qm_start
* to let qm start again.
*/
-int hisi_qm_stop(struct hisi_qm *qm)
+int hisi_qm_stop(struct hisi_qm *qm, enum qm_stop_reason r)
{
struct device *dev = &qm->pdev->dev;
int ret = 0;
down_write(&qm->qps_lock);
+ qm->status.stop_reason = r;
if (!qm_avail_state(qm, QM_STOP)) {
ret = -EPERM;
goto err_unlock;
@@ -3081,11 +3161,12 @@ EXPORT_SYMBOL_GPL(hisi_qm_sriov_enable);
/**
* hisi_qm_sriov_disable - disable virtual functions
- * @pdev: the PCI device
+ * @pdev: the PCI device.
+ * @is_frozen: true when all the VFs are frozen.
*
- * Return failure if there are VFs assigned already.
+ * Return failure if there are VFs assigned already or VF is in used.
*/
-int hisi_qm_sriov_disable(struct pci_dev *pdev)
+int hisi_qm_sriov_disable(struct pci_dev *pdev, bool is_frozen)
{
struct hisi_qm *qm = pci_get_drvdata(pdev);
@@ -3094,7 +3175,12 @@ int hisi_qm_sriov_disable(struct pci_dev *pdev)
return -EPERM;
}
- /* remove in hpre_pci_driver will be called to free VF resources */
+ /* While VF is in used, SRIOV cannot be disabled. */
+ if (!is_frozen && qm_try_frozen_vfs(pdev, qm->qm_list)) {
+ pci_err(pdev, "Task is using its VF!\n");
+ return -EBUSY;
+ }
+
pci_disable_sriov(pdev);
return qm_clear_vft_config(qm);
}
@@ -3110,7 +3196,7 @@ EXPORT_SYMBOL_GPL(hisi_qm_sriov_disable);
int hisi_qm_sriov_configure(struct pci_dev *pdev, int num_vfs)
{
if (num_vfs == 0)
- return hisi_qm_sriov_disable(pdev);
+ return hisi_qm_sriov_disable(pdev, 0);
else
return hisi_qm_sriov_enable(pdev, num_vfs);
}
@@ -3290,10 +3376,10 @@ static int qm_set_msi(struct hisi_qm *qm, bool set)
return 0;
}
-static int qm_vf_reset_prepare(struct hisi_qm *qm)
+static int qm_vf_reset_prepare(struct hisi_qm *qm,
+ enum qm_stop_reason stop_reason)
{
struct hisi_qm_list *qm_list = qm->qm_list;
- int stop_reason = qm->status.stop_reason;
struct pci_dev *pdev = qm->pdev;
struct pci_dev *virtfn;
struct hisi_qm *vf_qm;
@@ -3306,8 +3392,10 @@ static int qm_vf_reset_prepare(struct hisi_qm *qm)
continue;
if (pci_physfn(virtfn) == pdev) {
- vf_qm->status.stop_reason = stop_reason;
- ret = hisi_qm_stop(vf_qm);
+ /* save VFs PCIE BAR configuration */
+ pci_save_state(virtfn);
+
+ ret = hisi_qm_stop(vf_qm, stop_reason);
if (ret)
goto stop_fail;
}
@@ -3346,15 +3434,14 @@ static int qm_controller_reset_prepare(struct hisi_qm *qm)
}
if (qm->vfs_num) {
- ret = qm_vf_reset_prepare(qm);
+ ret = qm_vf_reset_prepare(qm, QM_SOFT_RESET);
if (ret) {
pci_err(pdev, "Fails to stop VFs!\n");
return ret;
}
}
- qm->status.stop_reason = QM_SOFT_RESET;
- ret = hisi_qm_stop(qm);
+ ret = hisi_qm_stop(qm, QM_SOFT_RESET);
if (ret) {
pci_err(pdev, "Fails to stop QM!\n");
return ret;
@@ -3471,6 +3558,9 @@ static int qm_vf_reset_done(struct hisi_qm *qm)
continue;
if (pci_physfn(virtfn) == pdev) {
+ /* enable VFs PCIE BAR configuration */
+ pci_restore_state(virtfn);
+
ret = qm_restart(vf_qm);
if (ret)
goto restart_fail;
@@ -3695,7 +3785,7 @@ void hisi_qm_reset_prepare(struct pci_dev *pdev)
}
if (qm->vfs_num) {
- ret = qm_vf_reset_prepare(qm);
+ ret = qm_vf_reset_prepare(qm, QM_FLR);
if (ret) {
pci_err(pdev, "Failed to prepare reset, ret = %d.\n",
ret);
@@ -3703,7 +3793,7 @@ void hisi_qm_reset_prepare(struct pci_dev *pdev)
}
}
- ret = hisi_qm_stop(qm);
+ ret = hisi_qm_stop(qm, QM_FLR);
if (ret) {
pci_err(pdev, "Failed to stop QM, ret = %d.\n", ret);
return;
@@ -3821,6 +3911,23 @@ err_aeq_irq:
return ret;
}
+/**
+ * hisi_qm_dev_shutdown() - Shutdown device.
+ * @pdev: The device will be shutdown.
+ *
+ * This function will stop qm when OS shutdown or rebooting.
+ */
+void hisi_qm_dev_shutdown(struct pci_dev *pdev)
+{
+ struct hisi_qm *qm = pci_get_drvdata(pdev);
+ int ret;
+
+ ret = hisi_qm_stop(qm, QM_NORMAL);
+ if (ret)
+ dev_err(&pdev->dev, "Fail to stop qm in shutdown!\n");
+}
+EXPORT_SYMBOL_GPL(hisi_qm_dev_shutdown);
+
static void hisi_qm_controller_reset(struct work_struct *rst_work)
{
struct hisi_qm *qm = container_of(rst_work, struct hisi_qm, rst_work);
@@ -3834,6 +3941,58 @@ static void hisi_qm_controller_reset(struct work_struct *rst_work)
}
/**
+ * hisi_qm_alg_register() - Register alg to crypto and add qm to qm_list.
+ * @qm: The qm needs add.
+ * @qm_list: The qm list.
+ *
+ * This function adds qm to qm list, and will register algorithm to
+ * crypto when the qm list is empty.
+ */
+int hisi_qm_alg_register(struct hisi_qm *qm, struct hisi_qm_list *qm_list)
+{
+ int flag = 0;
+ int ret = 0;
+
+ mutex_lock(&qm_list->lock);
+ if (list_empty(&qm_list->list))
+ flag = 1;
+ list_add_tail(&qm->list, &qm_list->list);
+ mutex_unlock(&qm_list->lock);
+
+ if (flag) {
+ ret = qm_list->register_to_crypto();
+ if (ret) {
+ mutex_lock(&qm_list->lock);
+ list_del(&qm->list);
+ mutex_unlock(&qm_list->lock);
+ }
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(hisi_qm_alg_register);
+
+/**
+ * hisi_qm_alg_unregister() - Unregister alg from crypto and delete qm from
+ * qm list.
+ * @qm: The qm needs delete.
+ * @qm_list: The qm list.
+ *
+ * This function deletes qm from qm list, and will unregister algorithm
+ * from crypto when the qm list is empty.
+ */
+void hisi_qm_alg_unregister(struct hisi_qm *qm, struct hisi_qm_list *qm_list)
+{
+ mutex_lock(&qm_list->lock);
+ list_del(&qm->list);
+ mutex_unlock(&qm_list->lock);
+
+ if (list_empty(&qm_list->list))
+ qm_list->unregister_from_crypto();
+}
+EXPORT_SYMBOL_GPL(hisi_qm_alg_unregister);
+
+/**
* hisi_qm_init() - Initialize configures about qm.
* @qm: The qm needing init.
*
generated by cgit v1.2.3 (git 2.39.0) at 2025-01-04 21:35:18 +0300