amazon/ena/ena_com.c

1657 	struct ena_com_phc_info *phc = &ena_dev->phc;
1659 	memset(phc, 0x0, sizeof(*phc));
1662 	phc->virt_addr = dma_alloc_coherent(ena_dev->dmadev,
1663 					    sizeof(*phc->virt_addr),
1664 					    &phc->phys_addr,
1666 	if (unlikely(!phc->virt_addr))
1669 	spin_lock_init(&phc->lock);
1671 	phc->virt_addr->req_id = 0;
1672 	phc->virt_addr->timestamp = 0;
1679 	struct ena_com_phc_info *phc = &ena_dev->phc;
1698 	if (get_feat_resp.u.phc.type != ENA_ADMIN_PHC_TYPE_READLESS) {
1708 	phc->doorbell_offset = get_feat_resp.u.phc.doorbell_offset;
1713 	phc->expire_timeout_usec = (get_feat_resp.u.phc.expire_timeout_usec) ?
1714 				    get_feat_resp.u.phc.expire_timeout_usec :
1720 	phc->block_timeout_usec = (get_feat_resp.u.phc.block_timeout_usec) ?
1721 				   get_feat_resp.u.phc.block_timeout_usec :
1725 	if (phc->expire_timeout_usec > phc->block_timeout_usec)
1726 		phc->expire_timeout_usec = phc->block_timeout_usec;
1732 	set_feat_cmd.u.phc.output_length = sizeof(*phc->virt_addr);
1734 				   &set_feat_cmd.u.phc.output_address,
1735 				   phc->phys_addr);
1757 	phc->active = true;
1765 	struct ena_com_phc_info *phc = &ena_dev->phc;
1769 	if (!phc->virt_addr)
1772 	spin_lock_irqsave(&phc->lock, flags);
1773 	phc->active = false;
1774 	spin_unlock_irqrestore(&phc->lock, flags);
1777 			  sizeof(*phc->virt_addr),
1778 			  phc->virt_addr,
1779 			  phc->phys_addr);
1780 	phc->virt_addr = NULL;
1785 	volatile struct ena_admin_phc_resp *resp = ena_dev->phc.virt_addr;
1787 	struct ena_com_phc_info *phc = &ena_dev->phc;
1793 	if (!phc->active) {
1798 	spin_lock_irqsave(&phc->lock, flags);
1801 	if (unlikely(ktime_compare(phc->system_time, zero_system_time))) {
1803 		block_time = ktime_add_us(phc->system_time, phc->block_timeout_usec);
1806 			phc->stats.phc_skp++;
1814 		if (READ_ONCE(resp->req_id) != phc->req_id) {
1820 				   phc->req_id);
1821 			phc->stats.phc_err_dv++;
1830 				   phc->req_id,
1832 			phc->stats.phc_err_ts += !!(resp->error_flags &
1838 			phc->stats.phc_exp++;
1843 	phc->system_time = ktime_get();
1844 	block_time = ktime_add_us(phc->system_time, phc->block_timeout_usec);
1845 	expire_time = ktime_add_us(phc->system_time, phc->expire_timeout_usec);
1850 	phc->req_id++;
1855 	resp->req_id = phc->req_id + ENA_PHC_REQ_ID_OFFSET;
1858 	writel(phc->req_id, ena_dev->reg_bar + phc->doorbell_offset);
1873 		if (READ_ONCE(resp->req_id) != phc->req_id) {
1898 		phc->stats.phc_cnt++;
1901 		phc->system_time = zero_system_time;
1906 	spin_unlock_irqrestore(&phc->lock, flags);