pds_core: implement pci reset handlers
Implement the callbacks for a nice PCI reset. These get called when a user is nice enough to use the sysfs PCI reset entry, e.g. echo 1 > /sys/bus/pci/devices/0000:2b:00.0/reset Signed-off-by: Shannon Nelson <shannon.nelson@amd.com> Reviewed-by: Brett Creeley <brett.creeley@amd.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -515,7 +515,7 @@ void pdsc_stop(struct pdsc *pdsc)
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PDS_CORE_INTR_MASK_SET);
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}
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static void pdsc_fw_down(struct pdsc *pdsc)
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void pdsc_fw_down(struct pdsc *pdsc)
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{
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union pds_core_notifyq_comp reset_event = {
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.reset.ecode = cpu_to_le16(PDS_EVENT_RESET),
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@ -523,10 +523,13 @@ static void pdsc_fw_down(struct pdsc *pdsc)
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};
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if (test_and_set_bit(PDSC_S_FW_DEAD, &pdsc->state)) {
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dev_err(pdsc->dev, "%s: already happening\n", __func__);
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dev_warn(pdsc->dev, "%s: already happening\n", __func__);
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return;
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}
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if (pdsc->pdev->is_virtfn)
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return;
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/* Notify clients of fw_down */
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if (pdsc->fw_reporter)
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devlink_health_report(pdsc->fw_reporter, "FW down reported", pdsc);
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@ -536,7 +539,7 @@ static void pdsc_fw_down(struct pdsc *pdsc)
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pdsc_teardown(pdsc, PDSC_TEARDOWN_RECOVERY);
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}
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static void pdsc_fw_up(struct pdsc *pdsc)
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void pdsc_fw_up(struct pdsc *pdsc)
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{
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union pds_core_notifyq_comp reset_event = {
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.reset.ecode = cpu_to_le16(PDS_EVENT_RESET),
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@ -549,6 +552,11 @@ static void pdsc_fw_up(struct pdsc *pdsc)
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return;
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}
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if (pdsc->pdev->is_virtfn) {
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clear_bit(PDSC_S_FW_DEAD, &pdsc->state);
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return;
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}
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err = pdsc_setup(pdsc, PDSC_SETUP_RECOVERY);
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if (err)
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goto err_out;
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@ -309,4 +309,8 @@ irqreturn_t pdsc_adminq_isr(int irq, void *data);
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int pdsc_firmware_update(struct pdsc *pdsc, const struct firmware *fw,
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struct netlink_ext_ack *extack);
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void pdsc_fw_down(struct pdsc *pdsc);
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void pdsc_fw_up(struct pdsc *pdsc);
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#endif /* _PDSC_H_ */
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@ -445,12 +445,62 @@ static void pdsc_remove(struct pci_dev *pdev)
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devlink_free(dl);
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}
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static void pdsc_reset_prepare(struct pci_dev *pdev)
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{
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struct pdsc *pdsc = pci_get_drvdata(pdev);
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pdsc_fw_down(pdsc);
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pci_free_irq_vectors(pdev);
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pdsc_unmap_bars(pdsc);
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pci_release_regions(pdev);
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pci_disable_device(pdev);
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}
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static void pdsc_reset_done(struct pci_dev *pdev)
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{
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struct pdsc *pdsc = pci_get_drvdata(pdev);
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struct device *dev = pdsc->dev;
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int err;
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err = pci_enable_device(pdev);
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if (err) {
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dev_err(dev, "Cannot enable PCI device: %pe\n", ERR_PTR(err));
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return;
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}
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pci_set_master(pdev);
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if (!pdev->is_virtfn) {
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pcie_print_link_status(pdsc->pdev);
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err = pci_request_regions(pdsc->pdev, PDS_CORE_DRV_NAME);
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if (err) {
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dev_err(pdsc->dev, "Cannot request PCI regions: %pe\n",
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ERR_PTR(err));
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return;
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}
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err = pdsc_map_bars(pdsc);
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if (err)
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return;
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}
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pdsc_fw_up(pdsc);
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}
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static const struct pci_error_handlers pdsc_err_handler = {
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/* FLR handling */
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.reset_prepare = pdsc_reset_prepare,
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.reset_done = pdsc_reset_done,
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};
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static struct pci_driver pdsc_driver = {
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.name = PDS_CORE_DRV_NAME,
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.id_table = pdsc_id_table,
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.probe = pdsc_probe,
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.remove = pdsc_remove,
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.sriov_configure = pdsc_sriov_configure,
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.err_handler = &pdsc_err_handler,
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};
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void *pdsc_get_pf_struct(struct pci_dev *vf_pdev)
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