[v7] net/ice: fix ice dcf control thread crash
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Commit Message
The control thread accesses the hardware resources after the
resources were released, which results in a segment error.
The 'ice-reset' threads are detached, so thread resources cannot be
reclaimed by `pthread_join` calls.
This commit synchronizes the number of "ice-reset" threads by adding a
variable ("vsi_update_thread_num") to the "struct ice_dcf_hw" and
performing an atomic operation on this variable. When releasing HW
resources, we wait for the number of "ice-reset" threads to be reduced
to 0 before releasing the resources.
Fixes: c7e1a1a3bfeb ("net/ice: refactor DCF VLAN handling")
Fixes: 3b3757bda3c3 ("net/ice: get VF hardware index in DCF")
Fixes: 7564d5509611 ("net/ice: add DCF hardware initialization")
Fixes: 0b02c9519432 ("net/ice: handle PF initialization by DCF")
Cc: stable@dpdk.org
Signed-off-by: Ke Zhang <ke1x.zhang@intel.com>
Signed-off-by: Mingjin Ye <mingjinx.ye@intel.com>
---
v2: add pthread_exit() for windows
---
v3: Optimization. It is unsafe for a thread to forcibly exit, which
will cause the spin lock to not be released correctly
---
v4: Safely wait for all event threads to end
---
v5: Spinlock moved to struct ice_dcf_hw
---
v6: Spinlock changed to atomic
---
V7: moving __atomic_fetch_add to the service_handler thread
---
drivers/net/ice/ice_dcf.c | 9 +++++++++
drivers/net/ice/ice_dcf.h | 2 ++
drivers/net/ice/ice_dcf_parent.c | 6 ++++++
3 files changed, 17 insertions(+)
Comments
> -----Original Message-----
> From: Ye, MingjinX <mingjinx.ye@intel.com>
> Sent: Tuesday, April 11, 2023 10:09 AM
> To: dev@dpdk.org
> Cc: Yang, Qiming <qiming.yang@intel.com>; stable@dpdk.org; Zhou, YidingX
> <yidingx.zhou@intel.com>; Ye, MingjinX <mingjinx.ye@intel.com>; Zhang,
> Ke1X <ke1x.zhang@intel.com>; Zhang, Qi Z <qi.z.zhang@intel.com>
> Subject: [PATCH v7] net/ice: fix ice dcf control thread crash
>
> The control thread accesses the hardware resources after the resources were
> released, which results in a segment error.
>
> The 'ice-reset' threads are detached, so thread resources cannot be
> reclaimed by `pthread_join` calls.
>
> This commit synchronizes the number of "ice-reset" threads by adding a
> variable ("vsi_update_thread_num") to the "struct ice_dcf_hw" and
> performing an atomic operation on this variable. When releasing HW
> resources, we wait for the number of "ice-reset" threads to be reduced to 0
> before releasing the resources.
>
> Fixes: c7e1a1a3bfeb ("net/ice: refactor DCF VLAN handling")
> Fixes: 3b3757bda3c3 ("net/ice: get VF hardware index in DCF")
> Fixes: 7564d5509611 ("net/ice: add DCF hardware initialization")
> Fixes: 0b02c9519432 ("net/ice: handle PF initialization by DCF")
> Cc: stable@dpdk.org
>
> Signed-off-by: Ke Zhang <ke1x.zhang@intel.com>
> Signed-off-by: Mingjin Ye <mingjinx.ye@intel.com>
Acked-by: Qi Zhang <qi.z.zhang@intel.com>
Applied to dpdk-next-net-intel.
Thanks
Qi
@@ -32,6 +32,8 @@
#define ICE_DCF_ARQ_MAX_RETRIES 200
#define ICE_DCF_ARQ_CHECK_TIME 2 /* msecs */
+#define ICE_DCF_CHECK_INTERVAL 100 /* 100ms */
+
#define ICE_DCF_VF_RES_BUF_SZ \
(sizeof(struct virtchnl_vf_resource) + \
IAVF_MAX_VF_VSI * sizeof(struct virtchnl_vsi_resource))
@@ -639,6 +641,8 @@ ice_dcf_init_hw(struct rte_eth_dev *eth_dev, struct ice_dcf_hw *hw)
rte_spinlock_init(&hw->vc_cmd_queue_lock);
TAILQ_INIT(&hw->vc_cmd_queue);
+ __atomic_store_n(&hw->vsi_update_thread_num, 0, __ATOMIC_RELAXED);
+
hw->arq_buf = rte_zmalloc("arq_buf", ICE_DCF_AQ_BUF_SZ, 0);
if (hw->arq_buf == NULL) {
PMD_INIT_LOG(ERR, "unable to allocate AdminQ buffer memory");
@@ -760,6 +764,11 @@ ice_dcf_uninit_hw(struct rte_eth_dev *eth_dev, struct ice_dcf_hw *hw)
rte_intr_callback_unregister(intr_handle,
ice_dcf_dev_interrupt_handler, hw);
+ /* Wait for all `ice-thread` threads to exit. */
+ while (__atomic_load_n(&hw->vsi_update_thread_num,
+ __ATOMIC_ACQUIRE) != 0)
+ rte_delay_ms(ICE_DCF_CHECK_INTERVAL);
+
ice_dcf_mode_disable(hw);
iavf_shutdown_adminq(&hw->avf);
@@ -105,6 +105,8 @@ struct ice_dcf_hw {
void (*vc_event_msg_cb)(struct ice_dcf_hw *dcf_hw,
uint8_t *msg, uint16_t msglen);
+ int vsi_update_thread_num;
+
uint8_t *arq_buf;
uint16_t num_vfs;
@@ -124,6 +124,9 @@ ice_dcf_vsi_update_service_handler(void *param)
container_of(hw, struct ice_dcf_adapter, real_hw);
struct ice_adapter *parent_adapter = &adapter->parent;
+ __atomic_fetch_add(&hw->vsi_update_thread_num, 1,
+ __ATOMIC_RELAXED);
+
pthread_detach(pthread_self());
rte_delay_us(ICE_DCF_VSI_UPDATE_SERVICE_INTERVAL);
@@ -154,6 +157,9 @@ ice_dcf_vsi_update_service_handler(void *param)
free(param);
+ __atomic_fetch_sub(&hw->vsi_update_thread_num, 1,
+ __ATOMIC_RELEASE);
+
return NULL;
}