Embedding net_device into structures prohibits the usage of flexible arrays in the net_device structure. For more details, see the discussion at [1].
Un-embed the net_devices from struct caam_qi_pcpu_priv by converting them into pointers, and allocating them dynamically. Use the leverage alloc_netdev_dummy() to allocate the net_device object at caam_qi_init(). The free of the device occurs at caam_qi_shutdown(). Link: https://lore.kernel.org/all/20240229225910.79e22...@kernel.org/ [1] Signed-off-by: Breno Leitao <lei...@debian.org> --- PS: Unfortunately due to lack of hardware, this was not tested in real hardware. drivers/crypto/caam/qi.c | 43 ++++++++++++++++++++++++++++++++-------- 1 file changed, 35 insertions(+), 8 deletions(-) diff --git a/drivers/crypto/caam/qi.c b/drivers/crypto/caam/qi.c index 46a083849a8e..0c13ffc81862 100644 --- a/drivers/crypto/caam/qi.c +++ b/drivers/crypto/caam/qi.c @@ -57,7 +57,7 @@ struct caam_napi { */ struct caam_qi_pcpu_priv { struct caam_napi caam_napi; - struct net_device net_dev; + struct net_device *net_dev; struct qman_fq *rsp_fq; } ____cacheline_aligned; @@ -144,7 +144,7 @@ static void caam_fq_ern_cb(struct qman_portal *qm, struct qman_fq *fq, { const struct qm_fd *fd; struct caam_drv_req *drv_req; - struct device *qidev = &(raw_cpu_ptr(&pcpu_qipriv)->net_dev.dev); + struct device *qidev = &(raw_cpu_ptr(&pcpu_qipriv)->net_dev->dev); struct caam_drv_private *priv = dev_get_drvdata(qidev); fd = &msg->ern.fd; @@ -530,6 +530,7 @@ static void caam_qi_shutdown(void *data) if (kill_fq(qidev, per_cpu(pcpu_qipriv.rsp_fq, i))) dev_err(qidev, "Rsp FQ kill failed, cpu: %d\n", i); + free_netdev(pcpu_qipriv.net_dev); } qman_delete_cgr_safe(&priv->cgr); @@ -573,7 +574,7 @@ static enum qman_cb_dqrr_result caam_rsp_fq_dqrr_cb(struct qman_portal *p, struct caam_napi *caam_napi = raw_cpu_ptr(&pcpu_qipriv.caam_napi); struct caam_drv_req *drv_req; const struct qm_fd *fd; - struct device *qidev = &(raw_cpu_ptr(&pcpu_qipriv)->net_dev.dev); + struct device *qidev = &(raw_cpu_ptr(&pcpu_qipriv)->net_dev->dev); struct caam_drv_private *priv = dev_get_drvdata(qidev); u32 status; @@ -718,12 +719,24 @@ static void free_rsp_fqs(void) kfree(per_cpu(pcpu_qipriv.rsp_fq, i)); } +static void free_caam_qi_pcpu_netdev(const cpumask_t *cpus) +{ + struct caam_qi_pcpu_priv *priv; + int i; + + for_each_cpu(i, cpus) { + priv = per_cpu_ptr(&pcpu_qipriv, i); + free_netdev(priv->net_dev); + } +} + int caam_qi_init(struct platform_device *caam_pdev) { int err, i; struct device *ctrldev = &caam_pdev->dev, *qidev; struct caam_drv_private *ctrlpriv; const cpumask_t *cpus = qman_affine_cpus(); + cpumask_t clean_mask; ctrlpriv = dev_get_drvdata(ctrldev); qidev = ctrldev; @@ -743,6 +756,8 @@ int caam_qi_init(struct platform_device *caam_pdev) return err; } + cpumask_clear(&clean_mask); + /* * Enable the NAPI contexts on each of the core which has an affine * portal. @@ -751,10 +766,16 @@ int caam_qi_init(struct platform_device *caam_pdev) struct caam_qi_pcpu_priv *priv = per_cpu_ptr(&pcpu_qipriv, i); struct caam_napi *caam_napi = &priv->caam_napi; struct napi_struct *irqtask = &caam_napi->irqtask; - struct net_device *net_dev = &priv->net_dev; + struct net_device *net_dev; + net_dev = alloc_netdev_dummy(0); + if (!net_dev) { + err = -ENOMEM; + goto fail; + } + cpumask_set_cpu(i, &clean_mask); + priv->net_dev = net_dev; net_dev->dev = *qidev; - INIT_LIST_HEAD(&net_dev->napi_list); netif_napi_add_tx_weight(net_dev, irqtask, caam_qi_poll, CAAM_NAPI_WEIGHT); @@ -766,16 +787,22 @@ int caam_qi_init(struct platform_device *caam_pdev) dma_get_cache_alignment(), 0, NULL); if (!qi_cache) { dev_err(qidev, "Can't allocate CAAM cache\n"); - free_rsp_fqs(); - return -ENOMEM; + err = -ENOMEM; + goto fail2; } caam_debugfs_qi_init(ctrlpriv); err = devm_add_action_or_reset(qidev, caam_qi_shutdown, ctrlpriv); if (err) - return err; + goto fail2; dev_info(qidev, "Linux CAAM Queue I/F driver initialised\n"); return 0; + +fail2: + free_rsp_fqs(); +fail: + free_caam_qi_pcpu_netdev(&clean_mask); + return err; } -- 2.43.0
