diff options
Diffstat (limited to 'drivers/net/ethernet/amd')
| -rw-r--r-- | drivers/net/ethernet/amd/pds_core/adminq.c | 64 | ||||
| -rw-r--r-- | drivers/net/ethernet/amd/pds_core/auxbus.c | 12 | ||||
| -rw-r--r-- | drivers/net/ethernet/amd/pds_core/core.c | 46 | ||||
| -rw-r--r-- | drivers/net/ethernet/amd/pds_core/core.h | 2 | ||||
| -rw-r--r-- | drivers/net/ethernet/amd/pds_core/debugfs.c | 4 | ||||
| -rw-r--r-- | drivers/net/ethernet/amd/pds_core/dev.c | 16 | ||||
| -rw-r--r-- | drivers/net/ethernet/amd/pds_core/devlink.c | 3 | ||||
| -rw-r--r-- | drivers/net/ethernet/amd/pds_core/fw.c | 3 | ||||
| -rw-r--r-- | drivers/net/ethernet/amd/pds_core/main.c | 32 |
9 files changed, 134 insertions, 48 deletions
diff --git a/drivers/net/ethernet/amd/pds_core/adminq.c b/drivers/net/ethernet/amd/pds_core/adminq.c index 5beadabc2136..ea773cfa0af6 100644 --- a/drivers/net/ethernet/amd/pds_core/adminq.c +++ b/drivers/net/ethernet/amd/pds_core/adminq.c @@ -63,6 +63,15 @@ static int pdsc_process_notifyq(struct pdsc_qcq *qcq) return nq_work; } +static bool pdsc_adminq_inc_if_up(struct pdsc *pdsc) +{ + if (pdsc->state & BIT_ULL(PDSC_S_STOPPING_DRIVER) || + pdsc->state & BIT_ULL(PDSC_S_FW_DEAD)) + return false; + + return refcount_inc_not_zero(&pdsc->adminq_refcnt); +} + void pdsc_process_adminq(struct pdsc_qcq *qcq) { union pds_core_adminq_comp *comp; @@ -75,9 +84,9 @@ void pdsc_process_adminq(struct pdsc_qcq *qcq) int aq_work = 0; int credits; - /* Don't process AdminQ when shutting down */ - if (pdsc->state & BIT_ULL(PDSC_S_STOPPING_DRIVER)) { - dev_err(pdsc->dev, "%s: called while PDSC_S_STOPPING_DRIVER\n", + /* Don't process AdminQ when it's not up */ + if (!pdsc_adminq_inc_if_up(pdsc)) { + dev_err(pdsc->dev, "%s: called while adminq is unavailable\n", __func__); return; } @@ -124,6 +133,7 @@ credits: pds_core_intr_credits(&pdsc->intr_ctrl[qcq->intx], credits, PDS_CORE_INTR_CRED_REARM); + refcount_dec(&pdsc->adminq_refcnt); } void pdsc_work_thread(struct work_struct *work) @@ -135,18 +145,20 @@ void pdsc_work_thread(struct work_struct *work) irqreturn_t pdsc_adminq_isr(int irq, void *data) { - struct pdsc_qcq *qcq = data; - struct pdsc *pdsc = qcq->pdsc; + struct pdsc *pdsc = data; + struct pdsc_qcq *qcq; - /* Don't process AdminQ when shutting down */ - if (pdsc->state & BIT_ULL(PDSC_S_STOPPING_DRIVER)) { - dev_err(pdsc->dev, "%s: called while PDSC_S_STOPPING_DRIVER\n", + /* Don't process AdminQ when it's not up */ + if (!pdsc_adminq_inc_if_up(pdsc)) { + dev_err(pdsc->dev, "%s: called while adminq is unavailable\n", __func__); return IRQ_HANDLED; } + qcq = &pdsc->adminqcq; queue_work(pdsc->wq, &qcq->work); pds_core_intr_mask(&pdsc->intr_ctrl[qcq->intx], PDS_CORE_INTR_MASK_CLEAR); + refcount_dec(&pdsc->adminq_refcnt); return IRQ_HANDLED; } @@ -179,10 +191,16 @@ static int __pdsc_adminq_post(struct pdsc *pdsc, /* Check that the FW is running */ if (!pdsc_is_fw_running(pdsc)) { - u8 fw_status = ioread8(&pdsc->info_regs->fw_status); - - dev_info(pdsc->dev, "%s: post failed - fw not running %#02x:\n", - __func__, fw_status); + if (pdsc->info_regs) { + u8 fw_status = + ioread8(&pdsc->info_regs->fw_status); + + dev_info(pdsc->dev, "%s: post failed - fw not running %#02x:\n", + __func__, fw_status); + } else { + dev_info(pdsc->dev, "%s: post failed - BARs not setup\n", + __func__); + } ret = -ENXIO; goto err_out_unlock; @@ -230,6 +248,12 @@ int pdsc_adminq_post(struct pdsc *pdsc, int err = 0; int index; + if (!pdsc_adminq_inc_if_up(pdsc)) { + dev_dbg(pdsc->dev, "%s: preventing adminq cmd %u\n", + __func__, cmd->opcode); + return -ENXIO; + } + wc.qcq = &pdsc->adminqcq; index = __pdsc_adminq_post(pdsc, &pdsc->adminqcq, cmd, comp, &wc); if (index < 0) { @@ -248,10 +272,16 @@ int pdsc_adminq_post(struct pdsc *pdsc, break; if (!pdsc_is_fw_running(pdsc)) { - u8 fw_status = ioread8(&pdsc->info_regs->fw_status); - - dev_dbg(pdsc->dev, "%s: post wait failed - fw not running %#02x:\n", - __func__, fw_status); + if (pdsc->info_regs) { + u8 fw_status = + ioread8(&pdsc->info_regs->fw_status); + + dev_dbg(pdsc->dev, "%s: post wait failed - fw not running %#02x:\n", + __func__, fw_status); + } else { + dev_dbg(pdsc->dev, "%s: post wait failed - BARs not setup\n", + __func__); + } err = -ENXIO; break; } @@ -285,6 +315,8 @@ err_out: queue_work(pdsc->wq, &pdsc->health_work); } + refcount_dec(&pdsc->adminq_refcnt); + return err; } EXPORT_SYMBOL_GPL(pdsc_adminq_post); diff --git a/drivers/net/ethernet/amd/pds_core/auxbus.c b/drivers/net/ethernet/amd/pds_core/auxbus.c index 11c23a7f3172..fd1a5149c003 100644 --- a/drivers/net/ethernet/amd/pds_core/auxbus.c +++ b/drivers/net/ethernet/amd/pds_core/auxbus.c @@ -160,23 +160,19 @@ static struct pds_auxiliary_dev *pdsc_auxbus_dev_register(struct pdsc *cf, if (err < 0) { dev_warn(cf->dev, "auxiliary_device_init of %s failed: %pe\n", name, ERR_PTR(err)); - goto err_out; + kfree(padev); + return ERR_PTR(err); } err = auxiliary_device_add(aux_dev); if (err) { dev_warn(cf->dev, "auxiliary_device_add of %s failed: %pe\n", name, ERR_PTR(err)); - goto err_out_uninit; + auxiliary_device_uninit(aux_dev); + return ERR_PTR(err); } return padev; - -err_out_uninit: - auxiliary_device_uninit(aux_dev); -err_out: - kfree(padev); - return ERR_PTR(err); } int pdsc_auxbus_dev_del(struct pdsc *cf, struct pdsc *pf) diff --git a/drivers/net/ethernet/amd/pds_core/core.c b/drivers/net/ethernet/amd/pds_core/core.c index 0d2091e9eb28..7658a7286767 100644 --- a/drivers/net/ethernet/amd/pds_core/core.c +++ b/drivers/net/ethernet/amd/pds_core/core.c @@ -125,7 +125,7 @@ static int pdsc_qcq_intr_alloc(struct pdsc *pdsc, struct pdsc_qcq *qcq) snprintf(name, sizeof(name), "%s-%d-%s", PDS_CORE_DRV_NAME, pdsc->pdev->bus->number, qcq->q.name); - index = pdsc_intr_alloc(pdsc, name, pdsc_adminq_isr, qcq); + index = pdsc_intr_alloc(pdsc, name, pdsc_adminq_isr, pdsc); if (index < 0) return index; qcq->intx = index; @@ -404,10 +404,7 @@ int pdsc_setup(struct pdsc *pdsc, bool init) int numdescs; int err; - if (init) - err = pdsc_dev_init(pdsc); - else - err = pdsc_dev_reinit(pdsc); + err = pdsc_dev_init(pdsc); if (err) return err; @@ -450,6 +447,7 @@ int pdsc_setup(struct pdsc *pdsc, bool init) pdsc_debugfs_add_viftype(pdsc); } + refcount_set(&pdsc->adminq_refcnt, 1); clear_bit(PDSC_S_FW_DEAD, &pdsc->state); return 0; @@ -464,6 +462,8 @@ void pdsc_teardown(struct pdsc *pdsc, bool removing) if (!pdsc->pdev->is_virtfn) pdsc_devcmd_reset(pdsc); + if (pdsc->adminqcq.work.func) + cancel_work_sync(&pdsc->adminqcq.work); pdsc_qcq_free(pdsc, &pdsc->notifyqcq); pdsc_qcq_free(pdsc, &pdsc->adminqcq); @@ -476,10 +476,9 @@ void pdsc_teardown(struct pdsc *pdsc, bool removing) for (i = 0; i < pdsc->nintrs; i++) pdsc_intr_free(pdsc, i); - if (removing) { - kfree(pdsc->intr_info); - pdsc->intr_info = NULL; - } + kfree(pdsc->intr_info); + pdsc->intr_info = NULL; + pdsc->nintrs = 0; } if (pdsc->kern_dbpage) { @@ -487,6 +486,7 @@ void pdsc_teardown(struct pdsc *pdsc, bool removing) pdsc->kern_dbpage = NULL; } + pci_free_irq_vectors(pdsc->pdev); set_bit(PDSC_S_FW_DEAD, &pdsc->state); } @@ -512,6 +512,24 @@ void pdsc_stop(struct pdsc *pdsc) PDS_CORE_INTR_MASK_SET); } +static void pdsc_adminq_wait_and_dec_once_unused(struct pdsc *pdsc) +{ + /* The driver initializes the adminq_refcnt to 1 when the adminq is + * allocated and ready for use. Other users/requesters will increment + * the refcnt while in use. If the refcnt is down to 1 then the adminq + * is not in use and the refcnt can be cleared and adminq freed. Before + * calling this function the driver will set PDSC_S_FW_DEAD, which + * prevent subsequent attempts to use the adminq and increment the + * refcnt to fail. This guarantees that this function will eventually + * exit. + */ + while (!refcount_dec_if_one(&pdsc->adminq_refcnt)) { + dev_dbg_ratelimited(pdsc->dev, "%s: adminq in use\n", + __func__); + cpu_relax(); + } +} + void pdsc_fw_down(struct pdsc *pdsc) { union pds_core_notifyq_comp reset_event = { @@ -527,6 +545,8 @@ void pdsc_fw_down(struct pdsc *pdsc) if (pdsc->pdev->is_virtfn) return; + pdsc_adminq_wait_and_dec_once_unused(pdsc); + /* Notify clients of fw_down */ if (pdsc->fw_reporter) devlink_health_report(pdsc->fw_reporter, "FW down reported", pdsc); @@ -577,7 +597,13 @@ err_out: static void pdsc_check_pci_health(struct pdsc *pdsc) { - u8 fw_status = ioread8(&pdsc->info_regs->fw_status); + u8 fw_status; + + /* some sort of teardown already in progress */ + if (!pdsc->info_regs) + return; + + fw_status = ioread8(&pdsc->info_regs->fw_status); /* is PCI broken? */ if (fw_status != PDS_RC_BAD_PCI) diff --git a/drivers/net/ethernet/amd/pds_core/core.h b/drivers/net/ethernet/amd/pds_core/core.h index e35d3e7006bf..110c4b826b22 100644 --- a/drivers/net/ethernet/amd/pds_core/core.h +++ b/drivers/net/ethernet/amd/pds_core/core.h @@ -184,6 +184,7 @@ struct pdsc { struct mutex devcmd_lock; /* lock for dev_cmd operations */ struct mutex config_lock; /* lock for configuration operations */ spinlock_t adminq_lock; /* lock for adminq operations */ + refcount_t adminq_refcnt; struct pds_core_dev_info_regs __iomem *info_regs; struct pds_core_dev_cmd_regs __iomem *cmd_regs; struct pds_core_intr __iomem *intr_ctrl; @@ -280,7 +281,6 @@ int pdsc_devcmd_locked(struct pdsc *pdsc, union pds_core_dev_cmd *cmd, union pds_core_dev_comp *comp, int max_seconds); int pdsc_devcmd_init(struct pdsc *pdsc); int pdsc_devcmd_reset(struct pdsc *pdsc); -int pdsc_dev_reinit(struct pdsc *pdsc); int pdsc_dev_init(struct pdsc *pdsc); void pdsc_reset_prepare(struct pci_dev *pdev); diff --git a/drivers/net/ethernet/amd/pds_core/debugfs.c b/drivers/net/ethernet/amd/pds_core/debugfs.c index 8ec392299b7d..4e8579ca1c8c 100644 --- a/drivers/net/ethernet/amd/pds_core/debugfs.c +++ b/drivers/net/ethernet/amd/pds_core/debugfs.c @@ -64,6 +64,10 @@ DEFINE_SHOW_ATTRIBUTE(identity); void pdsc_debugfs_add_ident(struct pdsc *pdsc) { + /* This file will already exist in the reset flow */ + if (debugfs_lookup("identity", pdsc->dentry)) + return; + debugfs_create_file("identity", 0400, pdsc->dentry, pdsc, &identity_fops); } diff --git a/drivers/net/ethernet/amd/pds_core/dev.c b/drivers/net/ethernet/amd/pds_core/dev.c index 31940b857e0e..e65a1632df50 100644 --- a/drivers/net/ethernet/amd/pds_core/dev.c +++ b/drivers/net/ethernet/amd/pds_core/dev.c @@ -57,6 +57,9 @@ int pdsc_err_to_errno(enum pds_core_status_code code) bool pdsc_is_fw_running(struct pdsc *pdsc) { + if (!pdsc->info_regs) + return false; + pdsc->fw_status = ioread8(&pdsc->info_regs->fw_status); pdsc->last_fw_time = jiffies; pdsc->last_hb = ioread32(&pdsc->info_regs->fw_heartbeat); @@ -182,13 +185,17 @@ int pdsc_devcmd_locked(struct pdsc *pdsc, union pds_core_dev_cmd *cmd, { int err; + if (!pdsc->cmd_regs) + return -ENXIO; + memcpy_toio(&pdsc->cmd_regs->cmd, cmd, sizeof(*cmd)); pdsc_devcmd_dbell(pdsc); err = pdsc_devcmd_wait(pdsc, cmd->opcode, max_seconds); - memcpy_fromio(comp, &pdsc->cmd_regs->comp, sizeof(*comp)); if ((err == -ENXIO || err == -ETIMEDOUT) && pdsc->wq) queue_work(pdsc->wq, &pdsc->health_work); + else + memcpy_fromio(comp, &pdsc->cmd_regs->comp, sizeof(*comp)); return err; } @@ -309,13 +316,6 @@ static int pdsc_identify(struct pdsc *pdsc) return 0; } -int pdsc_dev_reinit(struct pdsc *pdsc) -{ - pdsc_init_devinfo(pdsc); - - return pdsc_identify(pdsc); -} - int pdsc_dev_init(struct pdsc *pdsc) { unsigned int nintrs; diff --git a/drivers/net/ethernet/amd/pds_core/devlink.c b/drivers/net/ethernet/amd/pds_core/devlink.c index e9948ea5bbcd..54864f27c87a 100644 --- a/drivers/net/ethernet/amd/pds_core/devlink.c +++ b/drivers/net/ethernet/amd/pds_core/devlink.c @@ -111,7 +111,8 @@ int pdsc_dl_info_get(struct devlink *dl, struct devlink_info_req *req, mutex_lock(&pdsc->devcmd_lock); err = pdsc_devcmd_locked(pdsc, &cmd, &comp, pdsc->devcmd_timeout * 2); - memcpy_fromio(&fw_list, pdsc->cmd_regs->data, sizeof(fw_list)); + if (!err) + memcpy_fromio(&fw_list, pdsc->cmd_regs->data, sizeof(fw_list)); mutex_unlock(&pdsc->devcmd_lock); if (err && err != -EIO) return err; diff --git a/drivers/net/ethernet/amd/pds_core/fw.c b/drivers/net/ethernet/amd/pds_core/fw.c index 90a811f3878a..fa626719e68d 100644 --- a/drivers/net/ethernet/amd/pds_core/fw.c +++ b/drivers/net/ethernet/amd/pds_core/fw.c @@ -107,6 +107,9 @@ int pdsc_firmware_update(struct pdsc *pdsc, const struct firmware *fw, dev_info(pdsc->dev, "Installing firmware\n"); + if (!pdsc->cmd_regs) + return -ENXIO; + dl = priv_to_devlink(pdsc); devlink_flash_update_status_notify(dl, "Preparing to flash", NULL, 0, 0); diff --git a/drivers/net/ethernet/amd/pds_core/main.c b/drivers/net/ethernet/amd/pds_core/main.c index 3080898d7b95..0050c5894563 100644 --- a/drivers/net/ethernet/amd/pds_core/main.c +++ b/drivers/net/ethernet/amd/pds_core/main.c @@ -37,6 +37,11 @@ static void pdsc_unmap_bars(struct pdsc *pdsc) struct pdsc_dev_bar *bars = pdsc->bars; unsigned int i; + pdsc->info_regs = NULL; + pdsc->cmd_regs = NULL; + pdsc->intr_status = NULL; + pdsc->intr_ctrl = NULL; + for (i = 0; i < PDS_CORE_BARS_MAX; i++) { if (bars[i].vaddr) pci_iounmap(pdsc->pdev, bars[i].vaddr); @@ -293,7 +298,7 @@ err_out_stop: err_out_teardown: pdsc_teardown(pdsc, PDSC_TEARDOWN_REMOVING); err_out_unmap_bars: - del_timer_sync(&pdsc->wdtimer); + timer_shutdown_sync(&pdsc->wdtimer); if (pdsc->wq) destroy_workqueue(pdsc->wq); mutex_destroy(&pdsc->config_lock); @@ -420,7 +425,7 @@ static void pdsc_remove(struct pci_dev *pdev) */ pdsc_sriov_configure(pdev, 0); - del_timer_sync(&pdsc->wdtimer); + timer_shutdown_sync(&pdsc->wdtimer); if (pdsc->wq) destroy_workqueue(pdsc->wq); @@ -433,7 +438,6 @@ static void pdsc_remove(struct pci_dev *pdev) mutex_destroy(&pdsc->config_lock); mutex_destroy(&pdsc->devcmd_lock); - pci_free_irq_vectors(pdev); pdsc_unmap_bars(pdsc); pci_release_regions(pdev); } @@ -445,13 +449,32 @@ static void pdsc_remove(struct pci_dev *pdev) devlink_free(dl); } +static void pdsc_stop_health_thread(struct pdsc *pdsc) +{ + if (pdsc->pdev->is_virtfn) + return; + + timer_shutdown_sync(&pdsc->wdtimer); + if (pdsc->health_work.func) + cancel_work_sync(&pdsc->health_work); +} + +static void pdsc_restart_health_thread(struct pdsc *pdsc) +{ + if (pdsc->pdev->is_virtfn) + return; + + timer_setup(&pdsc->wdtimer, pdsc_wdtimer_cb, 0); + mod_timer(&pdsc->wdtimer, jiffies + 1); +} + void pdsc_reset_prepare(struct pci_dev *pdev) { struct pdsc *pdsc = pci_get_drvdata(pdev); + pdsc_stop_health_thread(pdsc); pdsc_fw_down(pdsc); - pci_free_irq_vectors(pdev); pdsc_unmap_bars(pdsc); pci_release_regions(pdev); pci_disable_device(pdev); @@ -486,6 +509,7 @@ void pdsc_reset_done(struct pci_dev *pdev) } pdsc_fw_up(pdsc); + pdsc_restart_health_thread(pdsc); } static const struct pci_error_handlers pdsc_err_handler = { |