^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * IBM Power Virtual Ethernet Device Driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) IBM Corporation, 2003, 2010
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Authors: Dave Larson <larson1@us.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Santiago Leon <santil@linux.vnet.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Brian King <brking@linux.vnet.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * Robert Jennings <rcj@linux.vnet.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * Anton Blanchard <anton@au.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/dma-mapping.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/netdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/etherdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/skbuff.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/pm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/ethtool.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <linux/in.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <linux/ip.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <linux/ipv6.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <asm/hvcall.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include <linux/atomic.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include <asm/vio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #include <asm/iommu.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #include <asm/firmware.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #include <net/tcp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #include <net/ip6_checksum.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #include "ibmveth.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) static struct kobj_type ktype_veth_pool;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) static const char ibmveth_driver_name[] = "ibmveth";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) static const char ibmveth_driver_string[] = "IBM Power Virtual Ethernet Driver";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #define ibmveth_driver_version "1.06"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) MODULE_AUTHOR("Santiago Leon <santil@linux.vnet.ibm.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) MODULE_DESCRIPTION("IBM Power Virtual Ethernet Driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) MODULE_VERSION(ibmveth_driver_version);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) static unsigned int tx_copybreak __read_mostly = 128;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) module_param(tx_copybreak, uint, 0644);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) MODULE_PARM_DESC(tx_copybreak,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) "Maximum size of packet that is copied to a new buffer on transmit");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) static unsigned int rx_copybreak __read_mostly = 128;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) module_param(rx_copybreak, uint, 0644);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) MODULE_PARM_DESC(rx_copybreak,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) "Maximum size of packet that is copied to a new buffer on receive");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) static unsigned int rx_flush __read_mostly = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) module_param(rx_flush, uint, 0644);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) MODULE_PARM_DESC(rx_flush, "Flush receive buffers before use");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) static bool old_large_send __read_mostly;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) module_param(old_large_send, bool, 0444);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) MODULE_PARM_DESC(old_large_send,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) "Use old large send method on firmware that supports the new method");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) struct ibmveth_stat {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) char name[ETH_GSTRING_LEN];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) int offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) #define IBMVETH_STAT_OFF(stat) offsetof(struct ibmveth_adapter, stat)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) #define IBMVETH_GET_STAT(a, off) *((u64 *)(((unsigned long)(a)) + off))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) static struct ibmveth_stat ibmveth_stats[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) { "replenish_task_cycles", IBMVETH_STAT_OFF(replenish_task_cycles) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) { "replenish_no_mem", IBMVETH_STAT_OFF(replenish_no_mem) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) { "replenish_add_buff_failure",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) IBMVETH_STAT_OFF(replenish_add_buff_failure) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) { "replenish_add_buff_success",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) IBMVETH_STAT_OFF(replenish_add_buff_success) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) { "rx_invalid_buffer", IBMVETH_STAT_OFF(rx_invalid_buffer) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) { "rx_no_buffer", IBMVETH_STAT_OFF(rx_no_buffer) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) { "tx_map_failed", IBMVETH_STAT_OFF(tx_map_failed) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) { "tx_send_failed", IBMVETH_STAT_OFF(tx_send_failed) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) { "fw_enabled_ipv4_csum", IBMVETH_STAT_OFF(fw_ipv4_csum_support) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) { "fw_enabled_ipv6_csum", IBMVETH_STAT_OFF(fw_ipv6_csum_support) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) { "tx_large_packets", IBMVETH_STAT_OFF(tx_large_packets) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) { "rx_large_packets", IBMVETH_STAT_OFF(rx_large_packets) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) { "fw_enabled_large_send", IBMVETH_STAT_OFF(fw_large_send_support) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) /* simple methods of getting data from the current rxq entry */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) static inline u32 ibmveth_rxq_flags(struct ibmveth_adapter *adapter)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) return be32_to_cpu(adapter->rx_queue.queue_addr[adapter->rx_queue.index].flags_off);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) static inline int ibmveth_rxq_toggle(struct ibmveth_adapter *adapter)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_TOGGLE) >>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) IBMVETH_RXQ_TOGGLE_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) return ibmveth_rxq_toggle(adapter) == adapter->rx_queue.toggle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) return ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_VALID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) return ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_OFF_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) static inline int ibmveth_rxq_large_packet(struct ibmveth_adapter *adapter)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) return ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_LRG_PKT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) return be32_to_cpu(adapter->rx_queue.queue_addr[adapter->rx_queue.index].length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) static inline int ibmveth_rxq_csum_good(struct ibmveth_adapter *adapter)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) return ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_CSUM_GOOD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) /* setup the initial settings for a buffer pool */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) static void ibmveth_init_buffer_pool(struct ibmveth_buff_pool *pool,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) u32 pool_index, u32 pool_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) u32 buff_size, u32 pool_active)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) pool->size = pool_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) pool->index = pool_index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) pool->buff_size = buff_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) pool->threshold = pool_size * 7 / 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) pool->active = pool_active;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) /* allocate and setup an buffer pool - called during open */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) static int ibmveth_alloc_buffer_pool(struct ibmveth_buff_pool *pool)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) pool->free_map = kmalloc_array(pool->size, sizeof(u16), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) if (!pool->free_map)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) pool->dma_addr = kcalloc(pool->size, sizeof(dma_addr_t), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) if (!pool->dma_addr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) kfree(pool->free_map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) pool->free_map = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) pool->skbuff = kcalloc(pool->size, sizeof(void *), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) if (!pool->skbuff) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) kfree(pool->dma_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) pool->dma_addr = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) kfree(pool->free_map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) pool->free_map = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) for (i = 0; i < pool->size; ++i)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) pool->free_map[i] = i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) atomic_set(&pool->available, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) pool->producer_index = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) pool->consumer_index = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) static inline void ibmveth_flush_buffer(void *addr, unsigned long length)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) unsigned long offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) for (offset = 0; offset < length; offset += SMP_CACHE_BYTES)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) asm("dcbfl %0,%1" :: "b" (addr), "r" (offset));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) /* replenish the buffers for a pool. note that we don't need to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) * skb_reserve these since they are used for incoming...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) struct ibmveth_buff_pool *pool)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) u32 i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) u32 count = pool->size - atomic_read(&pool->available);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) u32 buffers_added = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) unsigned int free_index, index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) u64 correlator;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) unsigned long lpar_rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) dma_addr_t dma_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) mb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) for (i = 0; i < count; ++i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) union ibmveth_buf_desc desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) skb = netdev_alloc_skb(adapter->netdev, pool->buff_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) if (!skb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) netdev_dbg(adapter->netdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) "replenish: unable to allocate skb\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) adapter->replenish_no_mem++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) free_index = pool->consumer_index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) pool->consumer_index++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) if (pool->consumer_index >= pool->size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) pool->consumer_index = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) index = pool->free_map[free_index];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) BUG_ON(index == IBM_VETH_INVALID_MAP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) BUG_ON(pool->skbuff[index] != NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) dma_addr = dma_map_single(&adapter->vdev->dev, skb->data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) pool->buff_size, DMA_FROM_DEVICE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) if (dma_mapping_error(&adapter->vdev->dev, dma_addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) goto failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) pool->free_map[free_index] = IBM_VETH_INVALID_MAP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) pool->dma_addr[index] = dma_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) pool->skbuff[index] = skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) correlator = ((u64)pool->index << 32) | index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) *(u64 *)skb->data = correlator;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) desc.fields.flags_len = IBMVETH_BUF_VALID | pool->buff_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) desc.fields.address = dma_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) if (rx_flush) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) unsigned int len = min(pool->buff_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) adapter->netdev->mtu +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) IBMVETH_BUFF_OH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) ibmveth_flush_buffer(skb->data, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) desc.desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) if (lpar_rc != H_SUCCESS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) goto failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) buffers_added++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) adapter->replenish_add_buff_success++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) mb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) atomic_add(buffers_added, &(pool->available));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) failure:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) pool->free_map[free_index] = index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) pool->skbuff[index] = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) if (pool->consumer_index == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) pool->consumer_index = pool->size - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) pool->consumer_index--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) if (!dma_mapping_error(&adapter->vdev->dev, dma_addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) dma_unmap_single(&adapter->vdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) pool->dma_addr[index], pool->buff_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) DMA_FROM_DEVICE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) dev_kfree_skb_any(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) adapter->replenish_add_buff_failure++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) mb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) atomic_add(buffers_added, &(pool->available));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) * The final 8 bytes of the buffer list is a counter of frames dropped
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) * because there was not a buffer in the buffer list capable of holding
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) * the frame.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) static void ibmveth_update_rx_no_buffer(struct ibmveth_adapter *adapter)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) __be64 *p = adapter->buffer_list_addr + 4096 - 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) adapter->rx_no_buffer = be64_to_cpup(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) /* replenish routine */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) static void ibmveth_replenish_task(struct ibmveth_adapter *adapter)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) adapter->replenish_task_cycles++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) for (i = (IBMVETH_NUM_BUFF_POOLS - 1); i >= 0; i--) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) struct ibmveth_buff_pool *pool = &adapter->rx_buff_pool[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) if (pool->active &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) (atomic_read(&pool->available) < pool->threshold))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) ibmveth_replenish_buffer_pool(adapter, pool);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) ibmveth_update_rx_no_buffer(adapter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) /* empty and free ana buffer pool - also used to do cleanup in error paths */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) struct ibmveth_buff_pool *pool)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) kfree(pool->free_map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) pool->free_map = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) if (pool->skbuff && pool->dma_addr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) for (i = 0; i < pool->size; ++i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) struct sk_buff *skb = pool->skbuff[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) if (skb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) dma_unmap_single(&adapter->vdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) pool->dma_addr[i],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) pool->buff_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) DMA_FROM_DEVICE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) dev_kfree_skb_any(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) pool->skbuff[i] = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) if (pool->dma_addr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) kfree(pool->dma_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) pool->dma_addr = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) if (pool->skbuff) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) kfree(pool->skbuff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) pool->skbuff = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) /* remove a buffer from a pool */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) u64 correlator)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) unsigned int pool = correlator >> 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) unsigned int index = correlator & 0xffffffffUL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) unsigned int free_index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) BUG_ON(index >= adapter->rx_buff_pool[pool].size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) skb = adapter->rx_buff_pool[pool].skbuff[index];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) BUG_ON(skb == NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) adapter->rx_buff_pool[pool].skbuff[index] = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) dma_unmap_single(&adapter->vdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) adapter->rx_buff_pool[pool].dma_addr[index],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) adapter->rx_buff_pool[pool].buff_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) DMA_FROM_DEVICE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) free_index = adapter->rx_buff_pool[pool].producer_index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) adapter->rx_buff_pool[pool].producer_index++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) if (adapter->rx_buff_pool[pool].producer_index >=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) adapter->rx_buff_pool[pool].size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) adapter->rx_buff_pool[pool].producer_index = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) adapter->rx_buff_pool[pool].free_map[free_index] = index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) mb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) atomic_dec(&(adapter->rx_buff_pool[pool].available));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) /* get the current buffer on the rx queue */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) unsigned int pool = correlator >> 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) unsigned int index = correlator & 0xffffffffUL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) BUG_ON(index >= adapter->rx_buff_pool[pool].size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) return adapter->rx_buff_pool[pool].skbuff[index];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) /* recycle the current buffer on the rx queue */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) static int ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) u32 q_index = adapter->rx_queue.index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) unsigned int pool = correlator >> 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) unsigned int index = correlator & 0xffffffffUL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) union ibmveth_buf_desc desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) unsigned long lpar_rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) int ret = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) BUG_ON(index >= adapter->rx_buff_pool[pool].size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) if (!adapter->rx_buff_pool[pool].active) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) ibmveth_rxq_harvest_buffer(adapter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) desc.fields.flags_len = IBMVETH_BUF_VALID |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) adapter->rx_buff_pool[pool].buff_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) if (lpar_rc != H_SUCCESS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) netdev_dbg(adapter->netdev, "h_add_logical_lan_buffer failed "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) "during recycle rc=%ld", lpar_rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) if (++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) adapter->rx_queue.index = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) if (++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) adapter->rx_queue.index = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) static int ibmveth_register_logical_lan(struct ibmveth_adapter *adapter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) union ibmveth_buf_desc rxq_desc, u64 mac_address)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) int rc, try_again = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) * After a kexec the adapter will still be open, so our attempt to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) * open it will fail. So if we get a failure we free the adapter and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) * try again, but only once.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) retry:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) rc = h_register_logical_lan(adapter->vdev->unit_address,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) adapter->buffer_list_dma, rxq_desc.desc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) adapter->filter_list_dma, mac_address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) if (rc != H_SUCCESS && try_again) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) rc = h_free_logical_lan(adapter->vdev->unit_address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) try_again = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) goto retry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) static u64 ibmveth_encode_mac_addr(u8 *mac)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) u64 encoded = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) for (i = 0; i < ETH_ALEN; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) encoded = (encoded << 8) | mac[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) return encoded;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) static int ibmveth_open(struct net_device *netdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) struct ibmveth_adapter *adapter = netdev_priv(netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) u64 mac_address;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) int rxq_entries = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) unsigned long lpar_rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) union ibmveth_buf_desc rxq_desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) struct device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) netdev_dbg(netdev, "open starting\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) napi_enable(&adapter->napi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) for(i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) rxq_entries += adapter->rx_buff_pool[i].size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) rc = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) if (!adapter->buffer_list_addr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) netdev_err(netdev, "unable to allocate list pages\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) if (!adapter->filter_list_addr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) netdev_err(netdev, "unable to allocate filter pages\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) goto out_free_buffer_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) dev = &adapter->vdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) rxq_entries;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) adapter->rx_queue.queue_addr =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) dma_alloc_coherent(dev, adapter->rx_queue.queue_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) &adapter->rx_queue.queue_dma, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) if (!adapter->rx_queue.queue_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) goto out_free_filter_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) adapter->buffer_list_dma = dma_map_single(dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) if (dma_mapping_error(dev, adapter->buffer_list_dma)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) netdev_err(netdev, "unable to map buffer list pages\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) goto out_free_queue_mem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) adapter->filter_list_dma = dma_map_single(dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) if (dma_mapping_error(dev, adapter->filter_list_dma)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) netdev_err(netdev, "unable to map filter list pages\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) goto out_unmap_buffer_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) adapter->rx_queue.index = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) adapter->rx_queue.num_slots = rxq_entries;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) adapter->rx_queue.toggle = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) mac_address = ibmveth_encode_mac_addr(netdev->dev_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) rxq_desc.fields.flags_len = IBMVETH_BUF_VALID |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) adapter->rx_queue.queue_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) rxq_desc.fields.address = adapter->rx_queue.queue_dma;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) netdev_dbg(netdev, "buffer list @ 0x%p\n", adapter->buffer_list_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) netdev_dbg(netdev, "filter list @ 0x%p\n", adapter->filter_list_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) netdev_dbg(netdev, "receive q @ 0x%p\n", adapter->rx_queue.queue_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) lpar_rc = ibmveth_register_logical_lan(adapter, rxq_desc, mac_address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) if (lpar_rc != H_SUCCESS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) netdev_err(netdev, "h_register_logical_lan failed with %ld\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) lpar_rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) netdev_err(netdev, "buffer TCE:0x%llx filter TCE:0x%llx rxq "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) "desc:0x%llx MAC:0x%llx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) adapter->buffer_list_dma,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) adapter->filter_list_dma,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) rxq_desc.desc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) mac_address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) rc = -ENONET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) goto out_unmap_filter_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) if (!adapter->rx_buff_pool[i].active)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) if (ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[i])) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) netdev_err(netdev, "unable to alloc pool\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) adapter->rx_buff_pool[i].active = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) rc = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) goto out_free_buffer_pools;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) netdev_dbg(netdev, "registering irq 0x%x\n", netdev->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) rc = request_irq(netdev->irq, ibmveth_interrupt, 0, netdev->name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) if (rc != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) netdev_err(netdev, "unable to request irq 0x%x, rc %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) netdev->irq, rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) lpar_rc = h_free_logical_lan(adapter->vdev->unit_address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) goto out_free_buffer_pools;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) rc = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) adapter->bounce_buffer =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) kmalloc(netdev->mtu + IBMVETH_BUFF_OH, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) if (!adapter->bounce_buffer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) goto out_free_irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) adapter->bounce_buffer_dma =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) dma_map_single(&adapter->vdev->dev, adapter->bounce_buffer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) netdev->mtu + IBMVETH_BUFF_OH, DMA_BIDIRECTIONAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) if (dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) netdev_err(netdev, "unable to map bounce buffer\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) goto out_free_bounce_buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) netdev_dbg(netdev, "initial replenish cycle\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) ibmveth_interrupt(netdev->irq, netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) netif_start_queue(netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) netdev_dbg(netdev, "open complete\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) out_free_bounce_buffer:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) kfree(adapter->bounce_buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) out_free_irq:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) free_irq(netdev->irq, netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) out_free_buffer_pools:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) while (--i >= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) if (adapter->rx_buff_pool[i].active)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) ibmveth_free_buffer_pool(adapter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) &adapter->rx_buff_pool[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) out_unmap_filter_list:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) dma_unmap_single(dev, adapter->filter_list_dma, 4096,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) DMA_BIDIRECTIONAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) out_unmap_buffer_list:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) dma_unmap_single(dev, adapter->buffer_list_dma, 4096,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) DMA_BIDIRECTIONAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) out_free_queue_mem:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) dma_free_coherent(dev, adapter->rx_queue.queue_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) adapter->rx_queue.queue_addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) adapter->rx_queue.queue_dma);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) out_free_filter_list:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) free_page((unsigned long)adapter->filter_list_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) out_free_buffer_list:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) free_page((unsigned long)adapter->buffer_list_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) napi_disable(&adapter->napi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) static int ibmveth_close(struct net_device *netdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) struct ibmveth_adapter *adapter = netdev_priv(netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) struct device *dev = &adapter->vdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) long lpar_rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) netdev_dbg(netdev, "close starting\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) napi_disable(&adapter->napi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) if (!adapter->pool_config)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) netif_stop_queue(netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) lpar_rc = h_free_logical_lan(adapter->vdev->unit_address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) if (lpar_rc != H_SUCCESS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) netdev_err(netdev, "h_free_logical_lan failed with %lx, "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) "continuing with close\n", lpar_rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) free_irq(netdev->irq, netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) ibmveth_update_rx_no_buffer(adapter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) dma_unmap_single(dev, adapter->buffer_list_dma, 4096,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) DMA_BIDIRECTIONAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) free_page((unsigned long)adapter->buffer_list_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) dma_unmap_single(dev, adapter->filter_list_dma, 4096,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) DMA_BIDIRECTIONAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) free_page((unsigned long)adapter->filter_list_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) dma_free_coherent(dev, adapter->rx_queue.queue_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) adapter->rx_queue.queue_addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) adapter->rx_queue.queue_dma);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) if (adapter->rx_buff_pool[i].active)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) ibmveth_free_buffer_pool(adapter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) &adapter->rx_buff_pool[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) dma_unmap_single(&adapter->vdev->dev, adapter->bounce_buffer_dma,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) adapter->netdev->mtu + IBMVETH_BUFF_OH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) DMA_BIDIRECTIONAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) kfree(adapter->bounce_buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) netdev_dbg(netdev, "close complete\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) static int ibmveth_set_link_ksettings(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) const struct ethtool_link_ksettings *cmd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) struct ibmveth_adapter *adapter = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) return ethtool_virtdev_set_link_ksettings(dev, cmd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) &adapter->speed,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) &adapter->duplex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) static int ibmveth_get_link_ksettings(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) struct ethtool_link_ksettings *cmd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) struct ibmveth_adapter *adapter = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) cmd->base.speed = adapter->speed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) cmd->base.duplex = adapter->duplex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) cmd->base.port = PORT_OTHER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) static void ibmveth_init_link_settings(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) struct ibmveth_adapter *adapter = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) adapter->speed = SPEED_1000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) adapter->duplex = DUPLEX_FULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) static void netdev_get_drvinfo(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) struct ethtool_drvinfo *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) strlcpy(info->driver, ibmveth_driver_name, sizeof(info->driver));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) strlcpy(info->version, ibmveth_driver_version, sizeof(info->version));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) static netdev_features_t ibmveth_fix_features(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) netdev_features_t features)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) * Since the ibmveth firmware interface does not have the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) * concept of separate tx/rx checksum offload enable, if rx
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) * checksum is disabled we also have to disable tx checksum
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) * offload. Once we disable rx checksum offload, we are no
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) * longer allowed to send tx buffers that are not properly
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) * checksummed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) if (!(features & NETIF_F_RXCSUM))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) features &= ~NETIF_F_CSUM_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) return features;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) static int ibmveth_set_csum_offload(struct net_device *dev, u32 data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) struct ibmveth_adapter *adapter = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) unsigned long set_attr, clr_attr, ret_attr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) unsigned long set_attr6, clr_attr6;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) long ret, ret4, ret6;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) int rc1 = 0, rc2 = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) int restart = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) if (netif_running(dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) restart = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) adapter->pool_config = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) ibmveth_close(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) adapter->pool_config = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) set_attr = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) clr_attr = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) set_attr6 = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) clr_attr6 = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) if (data) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) set_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) set_attr6 = IBMVETH_ILLAN_IPV6_TCP_CSUM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) clr_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) clr_attr6 = IBMVETH_ILLAN_IPV6_TCP_CSUM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) ret = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) if (ret == H_SUCCESS &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) (ret_attr & IBMVETH_ILLAN_PADDED_PKT_CSUM)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) ret4 = h_illan_attributes(adapter->vdev->unit_address, clr_attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) set_attr, &ret_attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) if (ret4 != H_SUCCESS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) netdev_err(dev, "unable to change IPv4 checksum "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) "offload settings. %d rc=%ld\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) data, ret4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) h_illan_attributes(adapter->vdev->unit_address,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) set_attr, clr_attr, &ret_attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) if (data == 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) dev->features &= ~NETIF_F_IP_CSUM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) adapter->fw_ipv4_csum_support = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) ret6 = h_illan_attributes(adapter->vdev->unit_address,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) clr_attr6, set_attr6, &ret_attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) if (ret6 != H_SUCCESS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) netdev_err(dev, "unable to change IPv6 checksum "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) "offload settings. %d rc=%ld\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) data, ret6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) h_illan_attributes(adapter->vdev->unit_address,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) set_attr6, clr_attr6, &ret_attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) if (data == 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) dev->features &= ~NETIF_F_IPV6_CSUM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) adapter->fw_ipv6_csum_support = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) if (ret4 == H_SUCCESS || ret6 == H_SUCCESS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) adapter->rx_csum = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) rc1 = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) rc1 = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) netdev_err(dev, "unable to change checksum offload settings."
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) " %d rc=%ld ret_attr=%lx\n", data, ret,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) ret_attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) if (restart)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) rc2 = ibmveth_open(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) return rc1 ? rc1 : rc2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) static int ibmveth_set_tso(struct net_device *dev, u32 data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) struct ibmveth_adapter *adapter = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) unsigned long set_attr, clr_attr, ret_attr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) long ret1, ret2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) int rc1 = 0, rc2 = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) int restart = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) if (netif_running(dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) restart = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) adapter->pool_config = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) ibmveth_close(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) adapter->pool_config = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) set_attr = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) clr_attr = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) if (data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) set_attr = IBMVETH_ILLAN_LRG_SR_ENABLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) clr_attr = IBMVETH_ILLAN_LRG_SR_ENABLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) ret1 = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) if (ret1 == H_SUCCESS && (ret_attr & IBMVETH_ILLAN_LRG_SND_SUPPORT) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) !old_large_send) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) ret2 = h_illan_attributes(adapter->vdev->unit_address, clr_attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) set_attr, &ret_attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) if (ret2 != H_SUCCESS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) netdev_err(dev, "unable to change tso settings. %d rc=%ld\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) data, ret2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) h_illan_attributes(adapter->vdev->unit_address,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) set_attr, clr_attr, &ret_attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) if (data == 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) dev->features &= ~(NETIF_F_TSO | NETIF_F_TSO6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) rc1 = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) adapter->fw_large_send_support = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) adapter->large_send = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) /* Older firmware version of large send offload does not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) * support tcp6/ipv6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) if (data == 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) dev->features &= ~NETIF_F_TSO6;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) netdev_info(dev, "TSO feature requires all partitions to have updated driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) adapter->large_send = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) if (restart)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) rc2 = ibmveth_open(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) return rc1 ? rc1 : rc2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) static int ibmveth_set_features(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918) netdev_features_t features)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) struct ibmveth_adapter *adapter = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) int rx_csum = !!(features & NETIF_F_RXCSUM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) int large_send = !!(features & (NETIF_F_TSO | NETIF_F_TSO6));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) int rc1 = 0, rc2 = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) if (rx_csum != adapter->rx_csum) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) rc1 = ibmveth_set_csum_offload(dev, rx_csum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) if (rc1 && !adapter->rx_csum)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) dev->features =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) features & ~(NETIF_F_CSUM_MASK |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) NETIF_F_RXCSUM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) if (large_send != adapter->large_send) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) rc2 = ibmveth_set_tso(dev, large_send);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) if (rc2 && !adapter->large_send)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) dev->features =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) features & ~(NETIF_F_TSO | NETIF_F_TSO6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) return rc1 ? rc1 : rc2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) static void ibmveth_get_strings(struct net_device *dev, u32 stringset, u8 *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) if (stringset != ETH_SS_STATS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++, data += ETH_GSTRING_LEN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) memcpy(data, ibmveth_stats[i].name, ETH_GSTRING_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) static int ibmveth_get_sset_count(struct net_device *dev, int sset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) switch (sset) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957) case ETH_SS_STATS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) return ARRAY_SIZE(ibmveth_stats);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) static void ibmveth_get_ethtool_stats(struct net_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) struct ethtool_stats *stats, u64 *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) struct ibmveth_adapter *adapter = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971) data[i] = IBMVETH_GET_STAT(adapter, ibmveth_stats[i].offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974) static const struct ethtool_ops netdev_ethtool_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) .get_drvinfo = netdev_get_drvinfo,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) .get_link = ethtool_op_get_link,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) .get_strings = ibmveth_get_strings,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978) .get_sset_count = ibmveth_get_sset_count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) .get_ethtool_stats = ibmveth_get_ethtool_stats,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) .get_link_ksettings = ibmveth_get_link_ksettings,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981) .set_link_ksettings = ibmveth_set_link_ksettings,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) static int ibmveth_send(struct ibmveth_adapter *adapter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990) union ibmveth_buf_desc *descs, unsigned long mss)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992) unsigned long correlator;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993) unsigned int retry_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994) unsigned long ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997) * The retry count sets a maximum for the number of broadcast and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) * multicast destinations within the system.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000) retry_count = 1024;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001) correlator = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003) ret = h_send_logical_lan(adapter->vdev->unit_address,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) descs[0].desc, descs[1].desc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005) descs[2].desc, descs[3].desc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006) descs[4].desc, descs[5].desc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007) correlator, &correlator, mss,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) adapter->fw_large_send_support);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009) } while ((ret == H_BUSY) && (retry_count--));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011) if (ret != H_SUCCESS && ret != H_DROPPED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012) netdev_err(adapter->netdev, "tx: h_send_logical_lan failed "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) "with rc=%ld\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020) static int ibmveth_is_packet_unsupported(struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021) struct net_device *netdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023) struct ethhdr *ether_header;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026) ether_header = eth_hdr(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028) if (ether_addr_equal(ether_header->h_dest, netdev->dev_addr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) netdev_dbg(netdev, "veth doesn't support loopback packets, dropping packet.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030) netdev->stats.tx_dropped++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031) ret = -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037) static netdev_tx_t ibmveth_start_xmit(struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038) struct net_device *netdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) struct ibmveth_adapter *adapter = netdev_priv(netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041) unsigned int desc_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042) union ibmveth_buf_desc descs[6];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043) int last, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044) int force_bounce = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045) dma_addr_t dma_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046) unsigned long mss = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048) if (ibmveth_is_packet_unsupported(skb, netdev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051) /* veth doesn't handle frag_list, so linearize the skb.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052) * When GRO is enabled SKB's can have frag_list.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054) if (adapter->is_active_trunk &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055) skb_has_frag_list(skb) && __skb_linearize(skb)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056) netdev->stats.tx_dropped++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061) * veth handles a maximum of 6 segments including the header, so
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062) * we have to linearize the skb if there are more than this.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064) if (skb_shinfo(skb)->nr_frags > 5 && __skb_linearize(skb)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065) netdev->stats.tx_dropped++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069) /* veth can't checksum offload UDP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070) if (skb->ip_summed == CHECKSUM_PARTIAL &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071) ((skb->protocol == htons(ETH_P_IP) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072) ip_hdr(skb)->protocol != IPPROTO_TCP) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073) (skb->protocol == htons(ETH_P_IPV6) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074) ipv6_hdr(skb)->nexthdr != IPPROTO_TCP)) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075) skb_checksum_help(skb)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077) netdev_err(netdev, "tx: failed to checksum packet\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078) netdev->stats.tx_dropped++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082) desc_flags = IBMVETH_BUF_VALID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084) if (skb->ip_summed == CHECKSUM_PARTIAL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085) unsigned char *buf = skb_transport_header(skb) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086) skb->csum_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088) desc_flags |= (IBMVETH_BUF_NO_CSUM | IBMVETH_BUF_CSUM_GOOD);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090) /* Need to zero out the checksum */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091) buf[0] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1092) buf[1] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1093)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1094) if (skb_is_gso(skb) && adapter->fw_large_send_support)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1095) desc_flags |= IBMVETH_BUF_LRG_SND;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1096) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1097)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1098) retry_bounce:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1099) memset(descs, 0, sizeof(descs));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1101) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1102) * If a linear packet is below the rx threshold then
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1103) * copy it into the static bounce buffer. This avoids the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1104) * cost of a TCE insert and remove.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1105) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1106) if (force_bounce || (!skb_is_nonlinear(skb) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1107) (skb->len < tx_copybreak))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1108) skb_copy_from_linear_data(skb, adapter->bounce_buffer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1109) skb->len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1111) descs[0].fields.flags_len = desc_flags | skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1112) descs[0].fields.address = adapter->bounce_buffer_dma;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1114) if (ibmveth_send(adapter, descs, 0)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1115) adapter->tx_send_failed++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1116) netdev->stats.tx_dropped++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1117) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1118) netdev->stats.tx_packets++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1119) netdev->stats.tx_bytes += skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1122) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1123) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1125) /* Map the header */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1126) dma_addr = dma_map_single(&adapter->vdev->dev, skb->data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1127) skb_headlen(skb), DMA_TO_DEVICE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1128) if (dma_mapping_error(&adapter->vdev->dev, dma_addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1129) goto map_failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1131) descs[0].fields.flags_len = desc_flags | skb_headlen(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1132) descs[0].fields.address = dma_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1134) /* Map the frags */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1135) for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1136) const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1138) dma_addr = skb_frag_dma_map(&adapter->vdev->dev, frag, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1139) skb_frag_size(frag), DMA_TO_DEVICE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1141) if (dma_mapping_error(&adapter->vdev->dev, dma_addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1142) goto map_failed_frags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1144) descs[i+1].fields.flags_len = desc_flags | skb_frag_size(frag);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1145) descs[i+1].fields.address = dma_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1146) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1148) if (skb->ip_summed == CHECKSUM_PARTIAL && skb_is_gso(skb)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1149) if (adapter->fw_large_send_support) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1150) mss = (unsigned long)skb_shinfo(skb)->gso_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1151) adapter->tx_large_packets++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1152) } else if (!skb_is_gso_v6(skb)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1153) /* Put -1 in the IP checksum to tell phyp it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1154) * is a largesend packet. Put the mss in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1155) * the TCP checksum.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1156) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1157) ip_hdr(skb)->check = 0xffff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1158) tcp_hdr(skb)->check =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1159) cpu_to_be16(skb_shinfo(skb)->gso_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1160) adapter->tx_large_packets++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1161) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1162) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1164) if (ibmveth_send(adapter, descs, mss)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1165) adapter->tx_send_failed++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1166) netdev->stats.tx_dropped++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1167) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1168) netdev->stats.tx_packets++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1169) netdev->stats.tx_bytes += skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1170) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1172) dma_unmap_single(&adapter->vdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1173) descs[0].fields.address,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1174) descs[0].fields.flags_len & IBMVETH_BUF_LEN_MASK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1175) DMA_TO_DEVICE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1177) for (i = 1; i < skb_shinfo(skb)->nr_frags + 1; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1178) dma_unmap_page(&adapter->vdev->dev, descs[i].fields.address,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1179) descs[i].fields.flags_len & IBMVETH_BUF_LEN_MASK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1180) DMA_TO_DEVICE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1182) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1183) dev_consume_skb_any(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1184) return NETDEV_TX_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1186) map_failed_frags:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1187) last = i+1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1188) for (i = 1; i < last; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1189) dma_unmap_page(&adapter->vdev->dev, descs[i].fields.address,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1190) descs[i].fields.flags_len & IBMVETH_BUF_LEN_MASK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1191) DMA_TO_DEVICE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1193) dma_unmap_single(&adapter->vdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1194) descs[0].fields.address,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1195) descs[0].fields.flags_len & IBMVETH_BUF_LEN_MASK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1196) DMA_TO_DEVICE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1197) map_failed:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1198) if (!firmware_has_feature(FW_FEATURE_CMO))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1199) netdev_err(netdev, "tx: unable to map xmit buffer\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1200) adapter->tx_map_failed++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1201) if (skb_linearize(skb)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1202) netdev->stats.tx_dropped++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1203) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1204) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1205) force_bounce = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1206) goto retry_bounce;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1207) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1209) static void ibmveth_rx_mss_helper(struct sk_buff *skb, u16 mss, int lrg_pkt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1210) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1211) struct tcphdr *tcph;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1212) int offset = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1213) int hdr_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1214)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1215) /* only TCP packets will be aggregated */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1216) if (skb->protocol == htons(ETH_P_IP)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1217) struct iphdr *iph = (struct iphdr *)skb->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1219) if (iph->protocol == IPPROTO_TCP) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1220) offset = iph->ihl * 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1221) skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1222) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1223) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1224) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1225) } else if (skb->protocol == htons(ETH_P_IPV6)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1226) struct ipv6hdr *iph6 = (struct ipv6hdr *)skb->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1228) if (iph6->nexthdr == IPPROTO_TCP) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1229) offset = sizeof(struct ipv6hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1230) skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1231) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1232) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1233) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1234) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1235) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1236) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1237) /* if mss is not set through Large Packet bit/mss in rx buffer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1238) * expect that the mss will be written to the tcp header checksum.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1239) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1240) tcph = (struct tcphdr *)(skb->data + offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1241) if (lrg_pkt) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1242) skb_shinfo(skb)->gso_size = mss;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1243) } else if (offset) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1244) skb_shinfo(skb)->gso_size = ntohs(tcph->check);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1245) tcph->check = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1246) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1247)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1248) if (skb_shinfo(skb)->gso_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1249) hdr_len = offset + tcph->doff * 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1250) skb_shinfo(skb)->gso_segs =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1251) DIV_ROUND_UP(skb->len - hdr_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1252) skb_shinfo(skb)->gso_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1253) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1254) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1255)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1256) static void ibmveth_rx_csum_helper(struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1257) struct ibmveth_adapter *adapter)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1258) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1259) struct iphdr *iph = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1260) struct ipv6hdr *iph6 = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1261) __be16 skb_proto = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1262) u16 iphlen = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1263) u16 iph_proto = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1264) u16 tcphdrlen = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1265)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1266) skb_proto = be16_to_cpu(skb->protocol);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1267)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1268) if (skb_proto == ETH_P_IP) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1269) iph = (struct iphdr *)skb->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1270)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1271) /* If the IP checksum is not offloaded and if the packet
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1272) * is large send, the checksum must be rebuilt.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1273) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1274) if (iph->check == 0xffff) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1275) iph->check = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1276) iph->check = ip_fast_csum((unsigned char *)iph,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1277) iph->ihl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1278) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1279)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1280) iphlen = iph->ihl * 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1281) iph_proto = iph->protocol;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1282) } else if (skb_proto == ETH_P_IPV6) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1283) iph6 = (struct ipv6hdr *)skb->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1284) iphlen = sizeof(struct ipv6hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1285) iph_proto = iph6->nexthdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1286) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1287)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1288) /* In OVS environment, when a flow is not cached, specifically for a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1289) * new TCP connection, the first packet information is passed up
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1290) * the user space for finding a flow. During this process, OVS computes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1291) * checksum on the first packet when CHECKSUM_PARTIAL flag is set.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1292) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1293) * Given that we zeroed out TCP checksum field in transmit path
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1294) * (refer ibmveth_start_xmit routine) as we set "no checksum bit",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1295) * OVS computed checksum will be incorrect w/o TCP pseudo checksum
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1296) * in the packet. This leads to OVS dropping the packet and hence
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1297) * TCP retransmissions are seen.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1298) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1299) * So, re-compute TCP pseudo header checksum.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1300) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1301) if (iph_proto == IPPROTO_TCP && adapter->is_active_trunk) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1302) struct tcphdr *tcph = (struct tcphdr *)(skb->data + iphlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1303)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1304) tcphdrlen = skb->len - iphlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1305)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1306) /* Recompute TCP pseudo header checksum */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1307) if (skb_proto == ETH_P_IP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1308) tcph->check = ~csum_tcpudp_magic(iph->saddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1309) iph->daddr, tcphdrlen, iph_proto, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1310) else if (skb_proto == ETH_P_IPV6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1311) tcph->check = ~csum_ipv6_magic(&iph6->saddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1312) &iph6->daddr, tcphdrlen, iph_proto, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1313)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1314) /* Setup SKB fields for checksum offload */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1315) skb_partial_csum_set(skb, iphlen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1316) offsetof(struct tcphdr, check));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1317) skb_reset_network_header(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1318) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1319) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1320)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1321) static int ibmveth_poll(struct napi_struct *napi, int budget)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1322) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1323) struct ibmveth_adapter *adapter =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1324) container_of(napi, struct ibmveth_adapter, napi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1325) struct net_device *netdev = adapter->netdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1326) int frames_processed = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1327) unsigned long lpar_rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1328) u16 mss = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1330) while (frames_processed < budget) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1331) if (!ibmveth_rxq_pending_buffer(adapter))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1332) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1333)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1334) smp_rmb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1335) if (!ibmveth_rxq_buffer_valid(adapter)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1336) wmb(); /* suggested by larson1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1337) adapter->rx_invalid_buffer++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1338) netdev_dbg(netdev, "recycling invalid buffer\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1339) ibmveth_rxq_recycle_buffer(adapter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1340) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1341) struct sk_buff *skb, *new_skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1342) int length = ibmveth_rxq_frame_length(adapter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1343) int offset = ibmveth_rxq_frame_offset(adapter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1344) int csum_good = ibmveth_rxq_csum_good(adapter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1345) int lrg_pkt = ibmveth_rxq_large_packet(adapter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1346) __sum16 iph_check = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1347)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1348) skb = ibmveth_rxq_get_buffer(adapter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1349)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1350) /* if the large packet bit is set in the rx queue
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1351) * descriptor, the mss will be written by PHYP eight
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1352) * bytes from the start of the rx buffer, which is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1353) * skb->data at this stage
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1354) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1355) if (lrg_pkt) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1356) __be64 *rxmss = (__be64 *)(skb->data + 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1357)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1358) mss = (u16)be64_to_cpu(*rxmss);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1359) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1360)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1361) new_skb = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1362) if (length < rx_copybreak)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1363) new_skb = netdev_alloc_skb(netdev, length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1364)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1365) if (new_skb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1366) skb_copy_to_linear_data(new_skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1367) skb->data + offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1368) length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1369) if (rx_flush)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1370) ibmveth_flush_buffer(skb->data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1371) length + offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1372) if (!ibmveth_rxq_recycle_buffer(adapter))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1373) kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1374) skb = new_skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1375) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1376) ibmveth_rxq_harvest_buffer(adapter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1377) skb_reserve(skb, offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1378) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1379)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1380) skb_put(skb, length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1381) skb->protocol = eth_type_trans(skb, netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1382)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1383) /* PHYP without PLSO support places a -1 in the ip
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1384) * checksum for large send frames.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1385) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1386) if (skb->protocol == cpu_to_be16(ETH_P_IP)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1387) struct iphdr *iph = (struct iphdr *)skb->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1388)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1389) iph_check = iph->check;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1390) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1391)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1392) if ((length > netdev->mtu + ETH_HLEN) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1393) lrg_pkt || iph_check == 0xffff) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1394) ibmveth_rx_mss_helper(skb, mss, lrg_pkt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1395) adapter->rx_large_packets++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1396) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1397)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1398) if (csum_good) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1399) skb->ip_summed = CHECKSUM_UNNECESSARY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1400) ibmveth_rx_csum_helper(skb, adapter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1401) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1402)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1403) napi_gro_receive(napi, skb); /* send it up */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1404)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1405) netdev->stats.rx_packets++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1406) netdev->stats.rx_bytes += length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1407) frames_processed++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1408) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1409) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1410)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1411) ibmveth_replenish_task(adapter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1412)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1413) if (frames_processed < budget) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1414) napi_complete_done(napi, frames_processed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1415)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1416) /* We think we are done - reenable interrupts,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1417) * then check once more to make sure we are done.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1418) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1419) lpar_rc = h_vio_signal(adapter->vdev->unit_address,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1420) VIO_IRQ_ENABLE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1421)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1422) BUG_ON(lpar_rc != H_SUCCESS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1423)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1424) if (ibmveth_rxq_pending_buffer(adapter) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1425) napi_reschedule(napi)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1426) lpar_rc = h_vio_signal(adapter->vdev->unit_address,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1427) VIO_IRQ_DISABLE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1428) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1429) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1430)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1431) return frames_processed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1432) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1433)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1434) static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1435) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1436) struct net_device *netdev = dev_instance;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1437) struct ibmveth_adapter *adapter = netdev_priv(netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1438) unsigned long lpar_rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1439)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1440) if (napi_schedule_prep(&adapter->napi)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1441) lpar_rc = h_vio_signal(adapter->vdev->unit_address,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1442) VIO_IRQ_DISABLE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1443) BUG_ON(lpar_rc != H_SUCCESS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1444) __napi_schedule(&adapter->napi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1445) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1446) return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1447) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1448)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1449) static void ibmveth_set_multicast_list(struct net_device *netdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1450) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1451) struct ibmveth_adapter *adapter = netdev_priv(netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1452) unsigned long lpar_rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1453)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1454) if ((netdev->flags & IFF_PROMISC) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1455) (netdev_mc_count(netdev) > adapter->mcastFilterSize)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1456) lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1457) IbmVethMcastEnableRecv |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1458) IbmVethMcastDisableFiltering,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1459) 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1460) if (lpar_rc != H_SUCCESS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1461) netdev_err(netdev, "h_multicast_ctrl rc=%ld when "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1462) "entering promisc mode\n", lpar_rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1463) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1464) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1465) struct netdev_hw_addr *ha;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1466) /* clear the filter table & disable filtering */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1467) lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1468) IbmVethMcastEnableRecv |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1469) IbmVethMcastDisableFiltering |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1470) IbmVethMcastClearFilterTable,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1471) 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1472) if (lpar_rc != H_SUCCESS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1473) netdev_err(netdev, "h_multicast_ctrl rc=%ld when "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1474) "attempting to clear filter table\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1475) lpar_rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1476) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1477) /* add the addresses to the filter table */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1478) netdev_for_each_mc_addr(ha, netdev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1479) /* add the multicast address to the filter table */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1480) u64 mcast_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1481) mcast_addr = ibmveth_encode_mac_addr(ha->addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1482) lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1483) IbmVethMcastAddFilter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1484) mcast_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1485) if (lpar_rc != H_SUCCESS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1486) netdev_err(netdev, "h_multicast_ctrl rc=%ld "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1487) "when adding an entry to the filter "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1488) "table\n", lpar_rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1489) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1490) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1491)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1492) /* re-enable filtering */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1493) lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1494) IbmVethMcastEnableFiltering,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1495) 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1496) if (lpar_rc != H_SUCCESS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1497) netdev_err(netdev, "h_multicast_ctrl rc=%ld when "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1498) "enabling filtering\n", lpar_rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1499) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1500) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1501) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1502)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1503) static int ibmveth_change_mtu(struct net_device *dev, int new_mtu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1504) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1505) struct ibmveth_adapter *adapter = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1506) struct vio_dev *viodev = adapter->vdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1507) int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1508) int i, rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1509) int need_restart = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1510)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1511) for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1512) if (new_mtu_oh <= adapter->rx_buff_pool[i].buff_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1513) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1514)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1515) if (i == IBMVETH_NUM_BUFF_POOLS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1516) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1517)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1518) /* Deactivate all the buffer pools so that the next loop can activate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1519) only the buffer pools necessary to hold the new MTU */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1520) if (netif_running(adapter->netdev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1521) need_restart = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1522) adapter->pool_config = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1523) ibmveth_close(adapter->netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1524) adapter->pool_config = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1525) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1526)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1527) /* Look for an active buffer pool that can hold the new MTU */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1528) for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1529) adapter->rx_buff_pool[i].active = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1530)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1531) if (new_mtu_oh <= adapter->rx_buff_pool[i].buff_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1532) dev->mtu = new_mtu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1533) vio_cmo_set_dev_desired(viodev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1534) ibmveth_get_desired_dma
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1535) (viodev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1536) if (need_restart) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1537) return ibmveth_open(adapter->netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1538) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1539) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1540) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1541) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1542)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1543) if (need_restart && (rc = ibmveth_open(adapter->netdev)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1544) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1545)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1546) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1547) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1548)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1549) #ifdef CONFIG_NET_POLL_CONTROLLER
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1550) static void ibmveth_poll_controller(struct net_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1551) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1552) ibmveth_replenish_task(netdev_priv(dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1553) ibmveth_interrupt(dev->irq, dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1554) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1555) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1556)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1557) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1558) * ibmveth_get_desired_dma - Calculate IO memory desired by the driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1559) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1560) * @vdev: struct vio_dev for the device whose desired IO mem is to be returned
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1561) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1562) * Return value:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1563) * Number of bytes of IO data the driver will need to perform well.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1564) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1565) static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1566) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1567) struct net_device *netdev = dev_get_drvdata(&vdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1568) struct ibmveth_adapter *adapter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1569) struct iommu_table *tbl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1570) unsigned long ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1571) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1572) int rxqentries = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1573)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1574) tbl = get_iommu_table_base(&vdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1575)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1576) /* netdev inits at probe time along with the structures we need below*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1577) if (netdev == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1578) return IOMMU_PAGE_ALIGN(IBMVETH_IO_ENTITLEMENT_DEFAULT, tbl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1579)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1580) adapter = netdev_priv(netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1581)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1582) ret = IBMVETH_BUFF_LIST_SIZE + IBMVETH_FILT_LIST_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1583) ret += IOMMU_PAGE_ALIGN(netdev->mtu, tbl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1584)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1585) for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1586) /* add the size of the active receive buffers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1587) if (adapter->rx_buff_pool[i].active)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1588) ret +=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1589) adapter->rx_buff_pool[i].size *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1590) IOMMU_PAGE_ALIGN(adapter->rx_buff_pool[i].
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1591) buff_size, tbl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1592) rxqentries += adapter->rx_buff_pool[i].size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1593) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1594) /* add the size of the receive queue entries */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1595) ret += IOMMU_PAGE_ALIGN(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1596) rxqentries * sizeof(struct ibmveth_rx_q_entry), tbl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1597)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1598) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1599) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1600)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1601) static int ibmveth_set_mac_addr(struct net_device *dev, void *p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1602) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1603) struct ibmveth_adapter *adapter = netdev_priv(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1604) struct sockaddr *addr = p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1605) u64 mac_address;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1606) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1607)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1608) if (!is_valid_ether_addr(addr->sa_data))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1609) return -EADDRNOTAVAIL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1610)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1611) mac_address = ibmveth_encode_mac_addr(addr->sa_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1612) rc = h_change_logical_lan_mac(adapter->vdev->unit_address, mac_address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1613) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1614) netdev_err(adapter->netdev, "h_change_logical_lan_mac failed with rc=%d\n", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1615) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1616) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1617)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1618) ether_addr_copy(dev->dev_addr, addr->sa_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1619)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1620) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1621) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1622)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1623) static const struct net_device_ops ibmveth_netdev_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1624) .ndo_open = ibmveth_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1625) .ndo_stop = ibmveth_close,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1626) .ndo_start_xmit = ibmveth_start_xmit,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1627) .ndo_set_rx_mode = ibmveth_set_multicast_list,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1628) .ndo_do_ioctl = ibmveth_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1629) .ndo_change_mtu = ibmveth_change_mtu,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1630) .ndo_fix_features = ibmveth_fix_features,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1631) .ndo_set_features = ibmveth_set_features,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1632) .ndo_validate_addr = eth_validate_addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1633) .ndo_set_mac_address = ibmveth_set_mac_addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1634) #ifdef CONFIG_NET_POLL_CONTROLLER
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1635) .ndo_poll_controller = ibmveth_poll_controller,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1636) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1637) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1638)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1639) static int ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1640) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1641) int rc, i, mac_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1642) struct net_device *netdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1643) struct ibmveth_adapter *adapter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1644) unsigned char *mac_addr_p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1645) __be32 *mcastFilterSize_p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1646) long ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1647) unsigned long ret_attr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1648)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1649) dev_dbg(&dev->dev, "entering ibmveth_probe for UA 0x%x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1650) dev->unit_address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1651)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1652) mac_addr_p = (unsigned char *)vio_get_attribute(dev, VETH_MAC_ADDR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1653) &mac_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1654) if (!mac_addr_p) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1655) dev_err(&dev->dev, "Can't find VETH_MAC_ADDR attribute\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1656) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1657) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1658) /* Workaround for old/broken pHyp */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1659) if (mac_len == 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1660) mac_addr_p += 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1661) else if (mac_len != 6) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1662) dev_err(&dev->dev, "VETH_MAC_ADDR attribute wrong len %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1663) mac_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1664) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1665) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1666)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1667) mcastFilterSize_p = (__be32 *)vio_get_attribute(dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1668) VETH_MCAST_FILTER_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1669) NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1670) if (!mcastFilterSize_p) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1671) dev_err(&dev->dev, "Can't find VETH_MCAST_FILTER_SIZE "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1672) "attribute\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1673) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1674) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1675)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1676) netdev = alloc_etherdev(sizeof(struct ibmveth_adapter));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1677)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1678) if (!netdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1679) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1680)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1681) adapter = netdev_priv(netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1682) dev_set_drvdata(&dev->dev, netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1683)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1684) adapter->vdev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1685) adapter->netdev = netdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1686) adapter->mcastFilterSize = be32_to_cpu(*mcastFilterSize_p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1687) adapter->pool_config = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1688) ibmveth_init_link_settings(netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1689)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1690) netif_napi_add(netdev, &adapter->napi, ibmveth_poll, 16);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1691)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1692) netdev->irq = dev->irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1693) netdev->netdev_ops = &ibmveth_netdev_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1694) netdev->ethtool_ops = &netdev_ethtool_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1695) SET_NETDEV_DEV(netdev, &dev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1696) netdev->hw_features = NETIF_F_SG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1697) if (vio_get_attribute(dev, "ibm,illan-options", NULL) != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1698) netdev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1699) NETIF_F_RXCSUM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1700) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1701)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1702) netdev->features |= netdev->hw_features;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1703)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1704) ret = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1705)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1706) /* If running older firmware, TSO should not be enabled by default */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1707) if (ret == H_SUCCESS && (ret_attr & IBMVETH_ILLAN_LRG_SND_SUPPORT) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1708) !old_large_send) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1709) netdev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1710) netdev->features |= netdev->hw_features;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1711) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1712) netdev->hw_features |= NETIF_F_TSO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1713) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1714)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1715) adapter->is_active_trunk = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1716) if (ret == H_SUCCESS && (ret_attr & IBMVETH_ILLAN_ACTIVE_TRUNK)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1717) adapter->is_active_trunk = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1718) netdev->hw_features |= NETIF_F_FRAGLIST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1719) netdev->features |= NETIF_F_FRAGLIST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1720) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1721)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1722) netdev->min_mtu = IBMVETH_MIN_MTU;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1723) netdev->max_mtu = ETH_MAX_MTU - IBMVETH_BUFF_OH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1724)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1725) memcpy(netdev->dev_addr, mac_addr_p, ETH_ALEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1726)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1727) if (firmware_has_feature(FW_FEATURE_CMO))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1728) memcpy(pool_count, pool_count_cmo, sizeof(pool_count));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1729)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1730) for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1731) struct kobject *kobj = &adapter->rx_buff_pool[i].kobj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1732) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1733)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1734) ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1735) pool_count[i], pool_size[i],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1736) pool_active[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1737) error = kobject_init_and_add(kobj, &ktype_veth_pool,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1738) &dev->dev.kobj, "pool%d", i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1739) if (!error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1740) kobject_uevent(kobj, KOBJ_ADD);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1741) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1742)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1743) netdev_dbg(netdev, "adapter @ 0x%p\n", adapter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1744) netdev_dbg(netdev, "registering netdev...\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1745)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1746) ibmveth_set_features(netdev, netdev->features);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1747)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1748) rc = register_netdev(netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1749)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1750) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1751) netdev_dbg(netdev, "failed to register netdev rc=%d\n", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1752) free_netdev(netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1753) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1754) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1755)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1756) netdev_dbg(netdev, "registered\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1757)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1758) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1759) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1760)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1761) static int ibmveth_remove(struct vio_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1762) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1763) struct net_device *netdev = dev_get_drvdata(&dev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1764) struct ibmveth_adapter *adapter = netdev_priv(netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1765) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1766)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1767) for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1768) kobject_put(&adapter->rx_buff_pool[i].kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1769)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1770) unregister_netdev(netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1771)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1772) free_netdev(netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1773) dev_set_drvdata(&dev->dev, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1774)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1775) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1776) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1777)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1778) static struct attribute veth_active_attr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1779) static struct attribute veth_num_attr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1780) static struct attribute veth_size_attr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1781)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1782) static ssize_t veth_pool_show(struct kobject *kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1783) struct attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1784) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1785) struct ibmveth_buff_pool *pool = container_of(kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1786) struct ibmveth_buff_pool,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1787) kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1788)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1789) if (attr == &veth_active_attr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1790) return sprintf(buf, "%d\n", pool->active);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1791) else if (attr == &veth_num_attr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1792) return sprintf(buf, "%d\n", pool->size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1793) else if (attr == &veth_size_attr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1794) return sprintf(buf, "%d\n", pool->buff_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1795) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1796) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1797)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1798) static ssize_t veth_pool_store(struct kobject *kobj, struct attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1799) const char *buf, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1800) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1801) struct ibmveth_buff_pool *pool = container_of(kobj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1802) struct ibmveth_buff_pool,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1803) kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1804) struct net_device *netdev = dev_get_drvdata(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1805) container_of(kobj->parent, struct device, kobj));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1806) struct ibmveth_adapter *adapter = netdev_priv(netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1807) long value = simple_strtol(buf, NULL, 10);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1808) long rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1809)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1810) if (attr == &veth_active_attr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1811) if (value && !pool->active) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1812) if (netif_running(netdev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1813) if (ibmveth_alloc_buffer_pool(pool)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1814) netdev_err(netdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1815) "unable to alloc pool\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1816) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1817) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1818) pool->active = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1819) adapter->pool_config = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1820) ibmveth_close(netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1821) adapter->pool_config = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1822) if ((rc = ibmveth_open(netdev)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1823) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1824) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1825) pool->active = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1826) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1827) } else if (!value && pool->active) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1828) int mtu = netdev->mtu + IBMVETH_BUFF_OH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1829) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1830) /* Make sure there is a buffer pool with buffers that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1831) can hold a packet of the size of the MTU */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1832) for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1833) if (pool == &adapter->rx_buff_pool[i])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1834) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1835) if (!adapter->rx_buff_pool[i].active)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1836) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1837) if (mtu <= adapter->rx_buff_pool[i].buff_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1838) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1839) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1840)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1841) if (i == IBMVETH_NUM_BUFF_POOLS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1842) netdev_err(netdev, "no active pool >= MTU\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1843) return -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1844) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1845)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1846) if (netif_running(netdev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1847) adapter->pool_config = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1848) ibmveth_close(netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1849) pool->active = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1850) adapter->pool_config = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1851) if ((rc = ibmveth_open(netdev)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1852) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1853) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1854) pool->active = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1855) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1856) } else if (attr == &veth_num_attr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1857) if (value <= 0 || value > IBMVETH_MAX_POOL_COUNT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1858) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1859) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1860) if (netif_running(netdev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1861) adapter->pool_config = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1862) ibmveth_close(netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1863) adapter->pool_config = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1864) pool->size = value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1865) if ((rc = ibmveth_open(netdev)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1866) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1867) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1868) pool->size = value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1869) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1870) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1871) } else if (attr == &veth_size_attr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1872) if (value <= IBMVETH_BUFF_OH || value > IBMVETH_MAX_BUF_SIZE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1873) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1874) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1875) if (netif_running(netdev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1876) adapter->pool_config = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1877) ibmveth_close(netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1878) adapter->pool_config = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1879) pool->buff_size = value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1880) if ((rc = ibmveth_open(netdev)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1881) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1882) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1883) pool->buff_size = value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1884) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1885) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1886) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1887)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1888) /* kick the interrupt handler to allocate/deallocate pools */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1889) ibmveth_interrupt(netdev->irq, netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1890) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1891) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1892)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1893)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1894) #define ATTR(_name, _mode) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1895) struct attribute veth_##_name##_attr = { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1896) .name = __stringify(_name), .mode = _mode, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1897) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1898)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1899) static ATTR(active, 0644);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1900) static ATTR(num, 0644);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1901) static ATTR(size, 0644);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1902)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1903) static struct attribute *veth_pool_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1904) &veth_active_attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1905) &veth_num_attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1906) &veth_size_attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1907) NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1908) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1909)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1910) static const struct sysfs_ops veth_pool_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1911) .show = veth_pool_show,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1912) .store = veth_pool_store,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1913) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1914)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1915) static struct kobj_type ktype_veth_pool = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1916) .release = NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1917) .sysfs_ops = &veth_pool_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1918) .default_attrs = veth_pool_attrs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1919) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1920)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1921) static int ibmveth_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1922) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1923) struct net_device *netdev = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1924) ibmveth_interrupt(netdev->irq, netdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1925) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1926) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1927)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1928) static const struct vio_device_id ibmveth_device_table[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1929) { "network", "IBM,l-lan"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1930) { "", "" }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1931) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1932) MODULE_DEVICE_TABLE(vio, ibmveth_device_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1933)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1934) static const struct dev_pm_ops ibmveth_pm_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1935) .resume = ibmveth_resume
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1936) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1937)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1938) static struct vio_driver ibmveth_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1939) .id_table = ibmveth_device_table,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1940) .probe = ibmveth_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1941) .remove = ibmveth_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1942) .get_desired_dma = ibmveth_get_desired_dma,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1943) .name = ibmveth_driver_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1944) .pm = &ibmveth_pm_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1945) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1946)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1947) static int __init ibmveth_module_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1948) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1949) printk(KERN_DEBUG "%s: %s %s\n", ibmveth_driver_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1950) ibmveth_driver_string, ibmveth_driver_version);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1951)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1952) return vio_register_driver(&ibmveth_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1953) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1954)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1955) static void __exit ibmveth_module_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1956) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1957) vio_unregister_driver(&ibmveth_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1958) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1959)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1960) module_init(ibmveth_module_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1961) module_exit(ibmveth_module_exit);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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