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sys/dev/iavf/iavf_sysctls_common.h
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| /* SPDX-License-Identifier: BSD-3-Clause */ | |||||
| /* Copyright (c) 2021, Intel Corporation | |||||
| * All rights reserved. | |||||
| * | |||||
| * Redistribution and use in source and binary forms, with or without | |||||
| * modification, are permitted provided that the following conditions are met: | |||||
| * | |||||
| * 1. Redistributions of source code must retain the above copyright notice, | |||||
| * this list of conditions and the following disclaimer. | |||||
| * | |||||
| * 2. Redistributions in binary form must reproduce the above copyright | |||||
| * notice, this list of conditions and the following disclaimer in the | |||||
| * documentation and/or other materials provided with the distribution. | |||||
| * | |||||
| * 3. Neither the name of the Intel Corporation nor the names of its | |||||
| * contributors may be used to endorse or promote products derived from | |||||
| * this software without specific prior written permission. | |||||
| * | |||||
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |||||
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |||||
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |||||
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | |||||
| * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |||||
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |||||
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |||||
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |||||
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |||||
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |||||
| * POSSIBILITY OF SUCH DAMAGE. | |||||
| */ | |||||
| /*$FreeBSD$*/ | |||||
| /** | |||||
| * @file iavf_sysctls_common.h | |||||
| * @brief Sysctls common to the legacy and iflib drivers | |||||
| * | |||||
| * Contains global sysctl definitions which are shared between the legacy and | |||||
| * iflib driver implementations. | |||||
| */ | |||||
| #ifndef _IAVF_SYSCTLS_COMMON_H_ | |||||
| #define _IAVF_SYSCTLS_COMMON_H_ | |||||
| #include <sys/sysctl.h> | |||||
| /* Root node for tunables */ | |||||
| static SYSCTL_NODE(_hw, OID_AUTO, iavf, CTLFLAG_RD, 0, | |||||
| "IAVF driver parameters"); | |||||
| /** | |||||
| * @var iavf_enable_head_writeback | |||||
| * @brief Sysctl to control Tx descriptor completion method | |||||
| * | |||||
| * Global sysctl value indicating whether to enable the head writeback method | |||||
| * of Tx descriptor completion notification. | |||||
| * | |||||
| * @remark Head writeback has been deprecated and will only work on 700-series | |||||
| * virtual functions only. | |||||
| */ | |||||
| static int iavf_enable_head_writeback = 0; | |||||
| SYSCTL_INT(_hw_iavf, OID_AUTO, enable_head_writeback, CTLFLAG_RDTUN, | |||||
| &iavf_enable_head_writeback, 0, | |||||
| "For detecting last completed TX descriptor by hardware, use value written by HW instead of checking descriptors. For 700 series VFs only."); | |||||
| /** | |||||
| * @var iavf_core_debug_mask | |||||
| * @brief Debug mask for driver messages | |||||
| * | |||||
| * Global sysctl value used to control what set of debug messages are printed. | |||||
| * Used by messages in core driver code. | |||||
| */ | |||||
| static int iavf_core_debug_mask = 0; | |||||
| SYSCTL_INT(_hw_iavf, OID_AUTO, core_debug_mask, CTLFLAG_RDTUN, | |||||
| &iavf_core_debug_mask, 0, | |||||
| "Display debug statements that are printed in non-shared code"); | |||||
| /** | |||||
| * @var iavf_shared_debug_mask | |||||
| * @brief Debug mask for shared code messages | |||||
| * | |||||
| * Global sysctl value used to control what set of debug messages are printed. | |||||
| * Used by messages in shared device logic code. | |||||
| */ | |||||
| static int iavf_shared_debug_mask = 0; | |||||
| SYSCTL_INT(_hw_iavf, OID_AUTO, shared_debug_mask, CTLFLAG_RDTUN, | |||||
| &iavf_shared_debug_mask, 0, | |||||
| "Display debug statements that are printed in shared code"); | |||||
| /** | |||||
| * @var iavf_rx_itr | |||||
| * @brief Rx interrupt throttling rate | |||||
| * | |||||
| * Controls the default interrupt throttling rate for receive interrupts. | |||||
| */ | |||||
| int iavf_rx_itr = IAVF_ITR_8K; | |||||
| SYSCTL_INT(_hw_iavf, OID_AUTO, rx_itr, CTLFLAG_RDTUN, | |||||
| &iavf_rx_itr, 0, "RX Interrupt Rate"); | |||||
| /** | |||||
| * @var iavf_tx_itr | |||||
| * @brief Tx interrupt throttling rate | |||||
| * | |||||
| * Controls the default interrupt throttling rate for transmit interrupts. | |||||
| */ | |||||
| int iavf_tx_itr = IAVF_ITR_4K; | |||||
| SYSCTL_INT(_hw_iavf, OID_AUTO, tx_itr, CTLFLAG_RDTUN, | |||||
| &iavf_tx_itr, 0, "TX Interrupt Rate"); | |||||
| /** | |||||
| * iavf_save_tunables - Sanity check and save off tunable values | |||||
| * @sc: device softc | |||||
| * | |||||
| * @pre "iavf_drv_info.h" is included before this file | |||||
| * @pre dev pointer in sc is valid | |||||
| */ | |||||
| static void | |||||
| iavf_save_tunables(struct iavf_sc *sc) | |||||
| { | |||||
| device_t dev = sc->dev; | |||||
| u16 pci_device_id = pci_get_device(dev); | |||||
| /* Save tunable information */ | |||||
| sc->dbg_mask = (enum iavf_dbg_mask)iavf_core_debug_mask; | |||||
| sc->hw.debug_mask = iavf_shared_debug_mask; | |||||
| if (pci_device_id == IAVF_DEV_ID_VF || | |||||
| pci_device_id == IAVF_DEV_ID_X722_VF) | |||||
| sc->vsi.enable_head_writeback = !!(iavf_enable_head_writeback); | |||||
| else if (iavf_enable_head_writeback) { | |||||
| device_printf(dev, "Head writeback can only be enabled on 700 series Virtual Functions\n"); | |||||
| device_printf(dev, "Using descriptor writeback instead...\n"); | |||||
| sc->vsi.enable_head_writeback = 0; | |||||
| } | |||||
| if (iavf_tx_itr < 0 || iavf_tx_itr > IAVF_MAX_ITR) { | |||||
| device_printf(dev, "Invalid tx_itr value of %d set!\n", | |||||
| iavf_tx_itr); | |||||
| device_printf(dev, "tx_itr must be between %d and %d, " | |||||
| "inclusive\n", | |||||
| 0, IAVF_MAX_ITR); | |||||
| device_printf(dev, "Using default value of %d instead\n", | |||||
| IAVF_ITR_4K); | |||||
| sc->tx_itr = IAVF_ITR_4K; | |||||
| } else | |||||
| sc->tx_itr = iavf_tx_itr; | |||||
| if (iavf_rx_itr < 0 || iavf_rx_itr > IAVF_MAX_ITR) { | |||||
| device_printf(dev, "Invalid rx_itr value of %d set!\n", | |||||
| iavf_rx_itr); | |||||
| device_printf(dev, "rx_itr must be between %d and %d, " | |||||
| "inclusive\n", | |||||
| 0, IAVF_MAX_ITR); | |||||
| device_printf(dev, "Using default value of %d instead\n", | |||||
| IAVF_ITR_8K); | |||||
| sc->rx_itr = IAVF_ITR_8K; | |||||
| } else | |||||
| sc->rx_itr = iavf_rx_itr; | |||||
| } | |||||
| #endif /* _IAVF_SYSCTLS_COMMON_H_ */ | |||||