v4.19.13 snapshot.
diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c
new file mode 100644
index 0000000..5ab21a1
--- /dev/null
+++ b/drivers/net/ethernet/ibm/ibmvnic.c
@@ -0,0 +1,4907 @@
+/**************************************************************************/
+/* */
+/* IBM System i and System p Virtual NIC Device Driver */
+/* Copyright (C) 2014 IBM Corp. */
+/* Santiago Leon (santi_leon@yahoo.com) */
+/* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */
+/* John Allen (jallen@linux.vnet.ibm.com) */
+/* */
+/* This program is free software; you can redistribute it and/or modify */
+/* it under the terms of the GNU General Public License as published by */
+/* the Free Software Foundation; either version 2 of the License, or */
+/* (at your option) any later version. */
+/* */
+/* This program is distributed in the hope that it will be useful, */
+/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
+/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
+/* GNU General Public License for more details. */
+/* */
+/* You should have received a copy of the GNU General Public License */
+/* along with this program. */
+/* */
+/* This module contains the implementation of a virtual ethernet device */
+/* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */
+/* option of the RS/6000 Platform Architecture to interface with virtual */
+/* ethernet NICs that are presented to the partition by the hypervisor. */
+/* */
+/* Messages are passed between the VNIC driver and the VNIC server using */
+/* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */
+/* issue and receive commands that initiate communication with the server */
+/* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */
+/* are used by the driver to notify the server that a packet is */
+/* ready for transmission or that a buffer has been added to receive a */
+/* packet. Subsequently, sCRQs are used by the server to notify the */
+/* driver that a packet transmission has been completed or that a packet */
+/* has been received and placed in a waiting buffer. */
+/* */
+/* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */
+/* which skbs are DMA mapped and immediately unmapped when the transmit */
+/* or receive has been completed, the VNIC driver is required to use */
+/* "long term mapping". This entails that large, continuous DMA mapped */
+/* buffers are allocated on driver initialization and these buffers are */
+/* then continuously reused to pass skbs to and from the VNIC server. */
+/* */
+/**************************************************************************/
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/completion.h>
+#include <linux/ioport.h>
+#include <linux/dma-mapping.h>
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/mm.h>
+#include <linux/ethtool.h>
+#include <linux/proc_fs.h>
+#include <linux/if_arp.h>
+#include <linux/in.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <linux/irq.h>
+#include <linux/kthread.h>
+#include <linux/seq_file.h>
+#include <linux/interrupt.h>
+#include <net/net_namespace.h>
+#include <asm/hvcall.h>
+#include <linux/atomic.h>
+#include <asm/vio.h>
+#include <asm/iommu.h>
+#include <linux/uaccess.h>
+#include <asm/firmware.h>
+#include <linux/workqueue.h>
+#include <linux/if_vlan.h>
+#include <linux/utsname.h>
+
+#include "ibmvnic.h"
+
+static const char ibmvnic_driver_name[] = "ibmvnic";
+static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
+
+MODULE_AUTHOR("Santiago Leon");
+MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
+
+static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
+static int ibmvnic_remove(struct vio_dev *);
+static void release_sub_crqs(struct ibmvnic_adapter *, bool);
+static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
+static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
+static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
+static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
+static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
+ union sub_crq *sub_crq);
+static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
+static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
+static int enable_scrq_irq(struct ibmvnic_adapter *,
+ struct ibmvnic_sub_crq_queue *);
+static int disable_scrq_irq(struct ibmvnic_adapter *,
+ struct ibmvnic_sub_crq_queue *);
+static int pending_scrq(struct ibmvnic_adapter *,
+ struct ibmvnic_sub_crq_queue *);
+static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
+ struct ibmvnic_sub_crq_queue *);
+static int ibmvnic_poll(struct napi_struct *napi, int data);
+static void send_map_query(struct ibmvnic_adapter *adapter);
+static int send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
+static int send_request_unmap(struct ibmvnic_adapter *, u8);
+static int send_login(struct ibmvnic_adapter *adapter);
+static void send_cap_queries(struct ibmvnic_adapter *adapter);
+static int init_sub_crqs(struct ibmvnic_adapter *);
+static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter);
+static int ibmvnic_init(struct ibmvnic_adapter *);
+static int ibmvnic_reset_init(struct ibmvnic_adapter *);
+static void release_crq_queue(struct ibmvnic_adapter *);
+static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p);
+static int init_crq_queue(struct ibmvnic_adapter *adapter);
+
+struct ibmvnic_stat {
+ char name[ETH_GSTRING_LEN];
+ int offset;
+};
+
+#define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
+ offsetof(struct ibmvnic_statistics, stat))
+#define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off)))
+
+static const struct ibmvnic_stat ibmvnic_stats[] = {
+ {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
+ {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
+ {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
+ {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
+ {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
+ {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
+ {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
+ {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
+ {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
+ {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
+ {"align_errors", IBMVNIC_STAT_OFF(align_errors)},
+ {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
+ {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
+ {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
+ {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
+ {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
+ {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
+ {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
+ {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
+ {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
+ {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
+ {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
+};
+
+static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
+ unsigned long length, unsigned long *number,
+ unsigned long *irq)
+{
+ unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
+ long rc;
+
+ rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
+ *number = retbuf[0];
+ *irq = retbuf[1];
+
+ return rc;
+}
+
+static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
+ struct ibmvnic_long_term_buff *ltb, int size)
+{
+ struct device *dev = &adapter->vdev->dev;
+ int rc;
+
+ ltb->size = size;
+ ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr,
+ GFP_KERNEL);
+
+ if (!ltb->buff) {
+ dev_err(dev, "Couldn't alloc long term buffer\n");
+ return -ENOMEM;
+ }
+ ltb->map_id = adapter->map_id;
+ adapter->map_id++;
+
+ init_completion(&adapter->fw_done);
+ rc = send_request_map(adapter, ltb->addr,
+ ltb->size, ltb->map_id);
+ if (rc) {
+ dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
+ return rc;
+ }
+ wait_for_completion(&adapter->fw_done);
+
+ if (adapter->fw_done_rc) {
+ dev_err(dev, "Couldn't map long term buffer,rc = %d\n",
+ adapter->fw_done_rc);
+ dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
+ return -1;
+ }
+ return 0;
+}
+
+static void free_long_term_buff(struct ibmvnic_adapter *adapter,
+ struct ibmvnic_long_term_buff *ltb)
+{
+ struct device *dev = &adapter->vdev->dev;
+
+ if (!ltb->buff)
+ return;
+
+ if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
+ adapter->reset_reason != VNIC_RESET_MOBILITY)
+ send_request_unmap(adapter, ltb->map_id);
+ dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
+}
+
+static int reset_long_term_buff(struct ibmvnic_adapter *adapter,
+ struct ibmvnic_long_term_buff *ltb)
+{
+ int rc;
+
+ memset(ltb->buff, 0, ltb->size);
+
+ init_completion(&adapter->fw_done);
+ rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
+ if (rc)
+ return rc;
+ wait_for_completion(&adapter->fw_done);
+
+ if (adapter->fw_done_rc) {
+ dev_info(&adapter->vdev->dev,
+ "Reset failed, attempting to free and reallocate buffer\n");
+ free_long_term_buff(adapter, ltb);
+ return alloc_long_term_buff(adapter, ltb, ltb->size);
+ }
+ return 0;
+}
+
+static void deactivate_rx_pools(struct ibmvnic_adapter *adapter)
+{
+ int i;
+
+ for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
+ i++)
+ adapter->rx_pool[i].active = 0;
+}
+
+static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
+ struct ibmvnic_rx_pool *pool)
+{
+ int count = pool->size - atomic_read(&pool->available);
+ struct device *dev = &adapter->vdev->dev;
+ int buffers_added = 0;
+ unsigned long lpar_rc;
+ union sub_crq sub_crq;
+ struct sk_buff *skb;
+ unsigned int offset;
+ dma_addr_t dma_addr;
+ unsigned char *dst;
+ u64 *handle_array;
+ int shift = 0;
+ int index;
+ int i;
+
+ if (!pool->active)
+ return;
+
+ handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
+ be32_to_cpu(adapter->login_rsp_buf->
+ off_rxadd_subcrqs));
+
+ for (i = 0; i < count; ++i) {
+ skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
+ if (!skb) {
+ dev_err(dev, "Couldn't replenish rx buff\n");
+ adapter->replenish_no_mem++;
+ break;
+ }
+
+ index = pool->free_map[pool->next_free];
+
+ if (pool->rx_buff[index].skb)
+ dev_err(dev, "Inconsistent free_map!\n");
+
+ /* Copy the skb to the long term mapped DMA buffer */
+ offset = index * pool->buff_size;
+ dst = pool->long_term_buff.buff + offset;
+ memset(dst, 0, pool->buff_size);
+ dma_addr = pool->long_term_buff.addr + offset;
+ pool->rx_buff[index].data = dst;
+
+ pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
+ pool->rx_buff[index].dma = dma_addr;
+ pool->rx_buff[index].skb = skb;
+ pool->rx_buff[index].pool_index = pool->index;
+ pool->rx_buff[index].size = pool->buff_size;
+
+ memset(&sub_crq, 0, sizeof(sub_crq));
+ sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
+ sub_crq.rx_add.correlator =
+ cpu_to_be64((u64)&pool->rx_buff[index]);
+ sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
+ sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
+
+ /* The length field of the sCRQ is defined to be 24 bits so the
+ * buffer size needs to be left shifted by a byte before it is
+ * converted to big endian to prevent the last byte from being
+ * truncated.
+ */
+#ifdef __LITTLE_ENDIAN__
+ shift = 8;
+#endif
+ sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
+
+ lpar_rc = send_subcrq(adapter, handle_array[pool->index],
+ &sub_crq);
+ if (lpar_rc != H_SUCCESS)
+ goto failure;
+
+ buffers_added++;
+ adapter->replenish_add_buff_success++;
+ pool->next_free = (pool->next_free + 1) % pool->size;
+ }
+ atomic_add(buffers_added, &pool->available);
+ return;
+
+failure:
+ if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED)
+ dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n");
+ pool->free_map[pool->next_free] = index;
+ pool->rx_buff[index].skb = NULL;
+
+ dev_kfree_skb_any(skb);
+ adapter->replenish_add_buff_failure++;
+ atomic_add(buffers_added, &pool->available);
+
+ if (lpar_rc == H_CLOSED || adapter->failover_pending) {
+ /* Disable buffer pool replenishment and report carrier off if
+ * queue is closed or pending failover.
+ * Firmware guarantees that a signal will be sent to the
+ * driver, triggering a reset.
+ */
+ deactivate_rx_pools(adapter);
+ netif_carrier_off(adapter->netdev);
+ }
+}
+
+static void replenish_pools(struct ibmvnic_adapter *adapter)
+{
+ int i;
+
+ adapter->replenish_task_cycles++;
+ for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
+ i++) {
+ if (adapter->rx_pool[i].active)
+ replenish_rx_pool(adapter, &adapter->rx_pool[i]);
+ }
+}
+
+static void release_stats_buffers(struct ibmvnic_adapter *adapter)
+{
+ kfree(adapter->tx_stats_buffers);
+ kfree(adapter->rx_stats_buffers);
+ adapter->tx_stats_buffers = NULL;
+ adapter->rx_stats_buffers = NULL;
+}
+
+static int init_stats_buffers(struct ibmvnic_adapter *adapter)
+{
+ adapter->tx_stats_buffers =
+ kcalloc(IBMVNIC_MAX_QUEUES,
+ sizeof(struct ibmvnic_tx_queue_stats),
+ GFP_KERNEL);
+ if (!adapter->tx_stats_buffers)
+ return -ENOMEM;
+
+ adapter->rx_stats_buffers =
+ kcalloc(IBMVNIC_MAX_QUEUES,
+ sizeof(struct ibmvnic_rx_queue_stats),
+ GFP_KERNEL);
+ if (!adapter->rx_stats_buffers)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static void release_stats_token(struct ibmvnic_adapter *adapter)
+{
+ struct device *dev = &adapter->vdev->dev;
+
+ if (!adapter->stats_token)
+ return;
+
+ dma_unmap_single(dev, adapter->stats_token,
+ sizeof(struct ibmvnic_statistics),
+ DMA_FROM_DEVICE);
+ adapter->stats_token = 0;
+}
+
+static int init_stats_token(struct ibmvnic_adapter *adapter)
+{
+ struct device *dev = &adapter->vdev->dev;
+ dma_addr_t stok;
+
+ stok = dma_map_single(dev, &adapter->stats,
+ sizeof(struct ibmvnic_statistics),
+ DMA_FROM_DEVICE);
+ if (dma_mapping_error(dev, stok)) {
+ dev_err(dev, "Couldn't map stats buffer\n");
+ return -1;
+ }
+
+ adapter->stats_token = stok;
+ netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok);
+ return 0;
+}
+
+static int reset_rx_pools(struct ibmvnic_adapter *adapter)
+{
+ struct ibmvnic_rx_pool *rx_pool;
+ int rx_scrqs;
+ int i, j, rc;
+ u64 *size_array;
+
+ size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
+ be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
+
+ rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
+ for (i = 0; i < rx_scrqs; i++) {
+ rx_pool = &adapter->rx_pool[i];
+
+ netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i);
+
+ if (rx_pool->buff_size != be64_to_cpu(size_array[i])) {
+ free_long_term_buff(adapter, &rx_pool->long_term_buff);
+ rx_pool->buff_size = be64_to_cpu(size_array[i]);
+ alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
+ rx_pool->size *
+ rx_pool->buff_size);
+ } else {
+ rc = reset_long_term_buff(adapter,
+ &rx_pool->long_term_buff);
+ }
+
+ if (rc)
+ return rc;
+
+ for (j = 0; j < rx_pool->size; j++)
+ rx_pool->free_map[j] = j;
+
+ memset(rx_pool->rx_buff, 0,
+ rx_pool->size * sizeof(struct ibmvnic_rx_buff));
+
+ atomic_set(&rx_pool->available, 0);
+ rx_pool->next_alloc = 0;
+ rx_pool->next_free = 0;
+ rx_pool->active = 1;
+ }
+
+ return 0;
+}
+
+static void release_rx_pools(struct ibmvnic_adapter *adapter)
+{
+ struct ibmvnic_rx_pool *rx_pool;
+ int i, j;
+
+ if (!adapter->rx_pool)
+ return;
+
+ for (i = 0; i < adapter->num_active_rx_pools; i++) {
+ rx_pool = &adapter->rx_pool[i];
+
+ netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i);
+
+ kfree(rx_pool->free_map);
+ free_long_term_buff(adapter, &rx_pool->long_term_buff);
+
+ if (!rx_pool->rx_buff)
+ continue;
+
+ for (j = 0; j < rx_pool->size; j++) {
+ if (rx_pool->rx_buff[j].skb) {
+ dev_kfree_skb_any(rx_pool->rx_buff[j].skb);
+ rx_pool->rx_buff[j].skb = NULL;
+ }
+ }
+
+ kfree(rx_pool->rx_buff);
+ }
+
+ kfree(adapter->rx_pool);
+ adapter->rx_pool = NULL;
+ adapter->num_active_rx_pools = 0;
+}
+
+static int init_rx_pools(struct net_device *netdev)
+{
+ struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+ struct device *dev = &adapter->vdev->dev;
+ struct ibmvnic_rx_pool *rx_pool;
+ int rxadd_subcrqs;
+ u64 *size_array;
+ int i, j;
+
+ rxadd_subcrqs =
+ be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
+ size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
+ be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
+
+ adapter->rx_pool = kcalloc(rxadd_subcrqs,
+ sizeof(struct ibmvnic_rx_pool),
+ GFP_KERNEL);
+ if (!adapter->rx_pool) {
+ dev_err(dev, "Failed to allocate rx pools\n");
+ return -1;
+ }
+
+ adapter->num_active_rx_pools = rxadd_subcrqs;
+
+ for (i = 0; i < rxadd_subcrqs; i++) {
+ rx_pool = &adapter->rx_pool[i];
+
+ netdev_dbg(adapter->netdev,
+ "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n",
+ i, adapter->req_rx_add_entries_per_subcrq,
+ be64_to_cpu(size_array[i]));
+
+ rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
+ rx_pool->index = i;
+ rx_pool->buff_size = be64_to_cpu(size_array[i]);
+ rx_pool->active = 1;
+
+ rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
+ GFP_KERNEL);
+ if (!rx_pool->free_map) {
+ release_rx_pools(adapter);
+ return -1;
+ }
+
+ rx_pool->rx_buff = kcalloc(rx_pool->size,
+ sizeof(struct ibmvnic_rx_buff),
+ GFP_KERNEL);
+ if (!rx_pool->rx_buff) {
+ dev_err(dev, "Couldn't alloc rx buffers\n");
+ release_rx_pools(adapter);
+ return -1;
+ }
+
+ if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
+ rx_pool->size * rx_pool->buff_size)) {
+ release_rx_pools(adapter);
+ return -1;
+ }
+
+ for (j = 0; j < rx_pool->size; ++j)
+ rx_pool->free_map[j] = j;
+
+ atomic_set(&rx_pool->available, 0);
+ rx_pool->next_alloc = 0;
+ rx_pool->next_free = 0;
+ }
+
+ return 0;
+}
+
+static int reset_one_tx_pool(struct ibmvnic_adapter *adapter,
+ struct ibmvnic_tx_pool *tx_pool)
+{
+ int rc, i;
+
+ rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff);
+ if (rc)
+ return rc;
+
+ memset(tx_pool->tx_buff, 0,
+ tx_pool->num_buffers *
+ sizeof(struct ibmvnic_tx_buff));
+
+ for (i = 0; i < tx_pool->num_buffers; i++)
+ tx_pool->free_map[i] = i;
+
+ tx_pool->consumer_index = 0;
+ tx_pool->producer_index = 0;
+
+ return 0;
+}
+
+static int reset_tx_pools(struct ibmvnic_adapter *adapter)
+{
+ int tx_scrqs;
+ int i, rc;
+
+ tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
+ for (i = 0; i < tx_scrqs; i++) {
+ rc = reset_one_tx_pool(adapter, &adapter->tso_pool[i]);
+ if (rc)
+ return rc;
+ rc = reset_one_tx_pool(adapter, &adapter->tx_pool[i]);
+ if (rc)
+ return rc;
+ }
+
+ return 0;
+}
+
+static void release_vpd_data(struct ibmvnic_adapter *adapter)
+{
+ if (!adapter->vpd)
+ return;
+
+ kfree(adapter->vpd->buff);
+ kfree(adapter->vpd);
+
+ adapter->vpd = NULL;
+}
+
+static void release_one_tx_pool(struct ibmvnic_adapter *adapter,
+ struct ibmvnic_tx_pool *tx_pool)
+{
+ kfree(tx_pool->tx_buff);
+ kfree(tx_pool->free_map);
+ free_long_term_buff(adapter, &tx_pool->long_term_buff);
+}
+
+static void release_tx_pools(struct ibmvnic_adapter *adapter)
+{
+ int i;
+
+ if (!adapter->tx_pool)
+ return;
+
+ for (i = 0; i < adapter->num_active_tx_pools; i++) {
+ release_one_tx_pool(adapter, &adapter->tx_pool[i]);
+ release_one_tx_pool(adapter, &adapter->tso_pool[i]);
+ }
+
+ kfree(adapter->tx_pool);
+ adapter->tx_pool = NULL;
+ kfree(adapter->tso_pool);
+ adapter->tso_pool = NULL;
+ adapter->num_active_tx_pools = 0;
+}
+
+static int init_one_tx_pool(struct net_device *netdev,
+ struct ibmvnic_tx_pool *tx_pool,
+ int num_entries, int buf_size)
+{
+ struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+ int i;
+
+ tx_pool->tx_buff = kcalloc(num_entries,
+ sizeof(struct ibmvnic_tx_buff),
+ GFP_KERNEL);
+ if (!tx_pool->tx_buff)
+ return -1;
+
+ if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
+ num_entries * buf_size))
+ return -1;
+
+ tx_pool->free_map = kcalloc(num_entries, sizeof(int), GFP_KERNEL);
+ if (!tx_pool->free_map)
+ return -1;
+
+ for (i = 0; i < num_entries; i++)
+ tx_pool->free_map[i] = i;
+
+ tx_pool->consumer_index = 0;
+ tx_pool->producer_index = 0;
+ tx_pool->num_buffers = num_entries;
+ tx_pool->buf_size = buf_size;
+
+ return 0;
+}
+
+static int init_tx_pools(struct net_device *netdev)
+{
+ struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+ int tx_subcrqs;
+ int i, rc;
+
+ tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
+ adapter->tx_pool = kcalloc(tx_subcrqs,
+ sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
+ if (!adapter->tx_pool)
+ return -1;
+
+ adapter->tso_pool = kcalloc(tx_subcrqs,
+ sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
+ if (!adapter->tso_pool)
+ return -1;
+
+ adapter->num_active_tx_pools = tx_subcrqs;
+
+ for (i = 0; i < tx_subcrqs; i++) {
+ rc = init_one_tx_pool(netdev, &adapter->tx_pool[i],
+ adapter->req_tx_entries_per_subcrq,
+ adapter->req_mtu + VLAN_HLEN);
+ if (rc) {
+ release_tx_pools(adapter);
+ return rc;
+ }
+
+ init_one_tx_pool(netdev, &adapter->tso_pool[i],
+ IBMVNIC_TSO_BUFS,
+ IBMVNIC_TSO_BUF_SZ);
+ if (rc) {
+ release_tx_pools(adapter);
+ return rc;
+ }
+ }
+
+ return 0;
+}
+
+static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
+{
+ int i;
+
+ if (adapter->napi_enabled)
+ return;
+
+ for (i = 0; i < adapter->req_rx_queues; i++)
+ napi_enable(&adapter->napi[i]);
+
+ adapter->napi_enabled = true;
+}
+
+static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
+{
+ int i;
+
+ if (!adapter->napi_enabled)
+ return;
+
+ for (i = 0; i < adapter->req_rx_queues; i++) {
+ netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i);
+ napi_disable(&adapter->napi[i]);
+ }
+
+ adapter->napi_enabled = false;
+}
+
+static int init_napi(struct ibmvnic_adapter *adapter)
+{
+ int i;
+
+ adapter->napi = kcalloc(adapter->req_rx_queues,
+ sizeof(struct napi_struct), GFP_KERNEL);
+ if (!adapter->napi)
+ return -ENOMEM;
+
+ for (i = 0; i < adapter->req_rx_queues; i++) {
+ netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i);
+ netif_napi_add(adapter->netdev, &adapter->napi[i],
+ ibmvnic_poll, NAPI_POLL_WEIGHT);
+ }
+
+ adapter->num_active_rx_napi = adapter->req_rx_queues;
+ return 0;
+}
+
+static void release_napi(struct ibmvnic_adapter *adapter)
+{
+ int i;
+
+ if (!adapter->napi)
+ return;
+
+ for (i = 0; i < adapter->num_active_rx_napi; i++) {
+ if (&adapter->napi[i]) {
+ netdev_dbg(adapter->netdev,
+ "Releasing napi[%d]\n", i);
+ netif_napi_del(&adapter->napi[i]);
+ }
+ }
+
+ kfree(adapter->napi);
+ adapter->napi = NULL;
+ adapter->num_active_rx_napi = 0;
+ adapter->napi_enabled = false;
+}
+
+static int ibmvnic_login(struct net_device *netdev)
+{
+ struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+ unsigned long timeout = msecs_to_jiffies(30000);
+ int retry_count = 0;
+ bool retry;
+ int rc;
+
+ do {
+ retry = false;
+ if (retry_count > IBMVNIC_MAX_QUEUES) {
+ netdev_warn(netdev, "Login attempts exceeded\n");
+ return -1;
+ }
+
+ adapter->init_done_rc = 0;
+ reinit_completion(&adapter->init_done);
+ rc = send_login(adapter);
+ if (rc) {
+ netdev_warn(netdev, "Unable to login\n");
+ return rc;
+ }
+
+ if (!wait_for_completion_timeout(&adapter->init_done,
+ timeout)) {
+ netdev_warn(netdev, "Login timed out\n");
+ return -1;
+ }
+
+ if (adapter->init_done_rc == PARTIALSUCCESS) {
+ retry_count++;
+ release_sub_crqs(adapter, 1);
+
+ retry = true;
+ netdev_dbg(netdev,
+ "Received partial success, retrying...\n");
+ adapter->init_done_rc = 0;
+ reinit_completion(&adapter->init_done);
+ send_cap_queries(adapter);
+ if (!wait_for_completion_timeout(&adapter->init_done,
+ timeout)) {
+ netdev_warn(netdev,
+ "Capabilities query timed out\n");
+ return -1;
+ }
+
+ rc = init_sub_crqs(adapter);
+ if (rc) {
+ netdev_warn(netdev,
+ "SCRQ initialization failed\n");
+ return -1;
+ }
+
+ rc = init_sub_crq_irqs(adapter);
+ if (rc) {
+ netdev_warn(netdev,
+ "SCRQ irq initialization failed\n");
+ return -1;
+ }
+ } else if (adapter->init_done_rc) {
+ netdev_warn(netdev, "Adapter login failed\n");
+ return -1;
+ }
+ } while (retry);
+
+ /* handle pending MAC address changes after successful login */
+ if (adapter->mac_change_pending) {
+ __ibmvnic_set_mac(netdev, &adapter->desired.mac);
+ adapter->mac_change_pending = false;
+ }
+
+ return 0;
+}
+
+static void release_login_buffer(struct ibmvnic_adapter *adapter)
+{
+ kfree(adapter->login_buf);
+ adapter->login_buf = NULL;
+}
+
+static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter)
+{
+ kfree(adapter->login_rsp_buf);
+ adapter->login_rsp_buf = NULL;
+}
+
+static void release_resources(struct ibmvnic_adapter *adapter)
+{
+ release_vpd_data(adapter);
+
+ release_tx_pools(adapter);
+ release_rx_pools(adapter);
+
+ release_napi(adapter);
+ release_login_rsp_buffer(adapter);
+}
+
+static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
+{
+ struct net_device *netdev = adapter->netdev;
+ unsigned long timeout = msecs_to_jiffies(30000);
+ union ibmvnic_crq crq;
+ bool resend;
+ int rc;
+
+ netdev_dbg(netdev, "setting link state %d\n", link_state);
+
+ memset(&crq, 0, sizeof(crq));
+ crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
+ crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
+ crq.logical_link_state.link_state = link_state;
+
+ do {
+ resend = false;
+
+ reinit_completion(&adapter->init_done);
+ rc = ibmvnic_send_crq(adapter, &crq);
+ if (rc) {
+ netdev_err(netdev, "Failed to set link state\n");
+ return rc;
+ }
+
+ if (!wait_for_completion_timeout(&adapter->init_done,
+ timeout)) {
+ netdev_err(netdev, "timeout setting link state\n");
+ return -1;
+ }
+
+ if (adapter->init_done_rc == 1) {
+ /* Partuial success, delay and re-send */
+ mdelay(1000);
+ resend = true;
+ } else if (adapter->init_done_rc) {
+ netdev_warn(netdev, "Unable to set link state, rc=%d\n",
+ adapter->init_done_rc);
+ return adapter->init_done_rc;
+ }
+ } while (resend);
+
+ return 0;
+}
+
+static int set_real_num_queues(struct net_device *netdev)
+{
+ struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+ int rc;
+
+ netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n",
+ adapter->req_tx_queues, adapter->req_rx_queues);
+
+ rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
+ if (rc) {
+ netdev_err(netdev, "failed to set the number of tx queues\n");
+ return rc;
+ }
+
+ rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
+ if (rc)
+ netdev_err(netdev, "failed to set the number of rx queues\n");
+
+ return rc;
+}
+
+static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter)
+{
+ struct device *dev = &adapter->vdev->dev;
+ union ibmvnic_crq crq;
+ int len = 0;
+ int rc;
+
+ if (adapter->vpd->buff)
+ len = adapter->vpd->len;
+
+ init_completion(&adapter->fw_done);
+ crq.get_vpd_size.first = IBMVNIC_CRQ_CMD;
+ crq.get_vpd_size.cmd = GET_VPD_SIZE;
+ rc = ibmvnic_send_crq(adapter, &crq);
+ if (rc)
+ return rc;
+ wait_for_completion(&adapter->fw_done);
+
+ if (!adapter->vpd->len)
+ return -ENODATA;
+
+ if (!adapter->vpd->buff)
+ adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL);
+ else if (adapter->vpd->len != len)
+ adapter->vpd->buff =
+ krealloc(adapter->vpd->buff,
+ adapter->vpd->len, GFP_KERNEL);
+
+ if (!adapter->vpd->buff) {
+ dev_err(dev, "Could allocate VPD buffer\n");
+ return -ENOMEM;
+ }
+
+ adapter->vpd->dma_addr =
+ dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len,
+ DMA_FROM_DEVICE);
+ if (dma_mapping_error(dev, adapter->vpd->dma_addr)) {
+ dev_err(dev, "Could not map VPD buffer\n");
+ kfree(adapter->vpd->buff);
+ adapter->vpd->buff = NULL;
+ return -ENOMEM;
+ }
+
+ reinit_completion(&adapter->fw_done);
+ crq.get_vpd.first = IBMVNIC_CRQ_CMD;
+ crq.get_vpd.cmd = GET_VPD;
+ crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr);
+ crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len);
+ rc = ibmvnic_send_crq(adapter, &crq);
+ if (rc) {
+ kfree(adapter->vpd->buff);
+ adapter->vpd->buff = NULL;
+ return rc;
+ }
+ wait_for_completion(&adapter->fw_done);
+
+ return 0;
+}
+
+static int init_resources(struct ibmvnic_adapter *adapter)
+{
+ struct net_device *netdev = adapter->netdev;
+ int rc;
+
+ rc = set_real_num_queues(netdev);
+ if (rc)
+ return rc;
+
+ adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL);
+ if (!adapter->vpd)
+ return -ENOMEM;
+
+ /* Vital Product Data (VPD) */
+ rc = ibmvnic_get_vpd(adapter);
+ if (rc) {
+ netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n");
+ return rc;
+ }
+
+ adapter->map_id = 1;
+
+ rc = init_napi(adapter);
+ if (rc)
+ return rc;
+
+ send_map_query(adapter);
+
+ rc = init_rx_pools(netdev);
+ if (rc)
+ return rc;
+
+ rc = init_tx_pools(netdev);
+ return rc;
+}
+
+static int __ibmvnic_open(struct net_device *netdev)
+{
+ struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+ enum vnic_state prev_state = adapter->state;
+ int i, rc;
+
+ adapter->state = VNIC_OPENING;
+ replenish_pools(adapter);
+ ibmvnic_napi_enable(adapter);
+
+ /* We're ready to receive frames, enable the sub-crq interrupts and
+ * set the logical link state to up
+ */
+ for (i = 0; i < adapter->req_rx_queues; i++) {
+ netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i);
+ if (prev_state == VNIC_CLOSED)
+ enable_irq(adapter->rx_scrq[i]->irq);
+ enable_scrq_irq(adapter, adapter->rx_scrq[i]);
+ }
+
+ for (i = 0; i < adapter->req_tx_queues; i++) {
+ netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i);
+ if (prev_state == VNIC_CLOSED)
+ enable_irq(adapter->tx_scrq[i]->irq);
+ enable_scrq_irq(adapter, adapter->tx_scrq[i]);
+ }
+
+ rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
+ if (rc) {
+ for (i = 0; i < adapter->req_rx_queues; i++)
+ napi_disable(&adapter->napi[i]);
+ release_resources(adapter);
+ return rc;
+ }
+
+ netif_tx_start_all_queues(netdev);
+
+ if (prev_state == VNIC_CLOSED) {
+ for (i = 0; i < adapter->req_rx_queues; i++)
+ napi_schedule(&adapter->napi[i]);
+ }
+
+ adapter->state = VNIC_OPEN;
+ return rc;
+}
+
+static int ibmvnic_open(struct net_device *netdev)
+{
+ struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+ int rc;
+
+ /* If device failover is pending, just set device state and return.
+ * Device operation will be handled by reset routine.
+ */
+ if (adapter->failover_pending) {
+ adapter->state = VNIC_OPEN;
+ return 0;
+ }
+
+ if (adapter->state != VNIC_CLOSED) {
+ rc = ibmvnic_login(netdev);
+ if (rc)
+ return rc;
+
+ rc = init_resources(adapter);
+ if (rc) {
+ netdev_err(netdev, "failed to initialize resources\n");
+ release_resources(adapter);
+ return rc;
+ }
+ }
+
+ rc = __ibmvnic_open(netdev);
+ netif_carrier_on(netdev);
+
+ return rc;
+}
+
+static void clean_rx_pools(struct ibmvnic_adapter *adapter)
+{
+ struct ibmvnic_rx_pool *rx_pool;
+ struct ibmvnic_rx_buff *rx_buff;
+ u64 rx_entries;
+ int rx_scrqs;
+ int i, j;
+
+ if (!adapter->rx_pool)
+ return;
+
+ rx_scrqs = adapter->num_active_rx_pools;
+ rx_entries = adapter->req_rx_add_entries_per_subcrq;
+
+ /* Free any remaining skbs in the rx buffer pools */
+ for (i = 0; i < rx_scrqs; i++) {
+ rx_pool = &adapter->rx_pool[i];
+ if (!rx_pool || !rx_pool->rx_buff)
+ continue;
+
+ netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i);
+ for (j = 0; j < rx_entries; j++) {
+ rx_buff = &rx_pool->rx_buff[j];
+ if (rx_buff && rx_buff->skb) {
+ dev_kfree_skb_any(rx_buff->skb);
+ rx_buff->skb = NULL;
+ }
+ }
+ }
+}
+
+static void clean_one_tx_pool(struct ibmvnic_adapter *adapter,
+ struct ibmvnic_tx_pool *tx_pool)
+{
+ struct ibmvnic_tx_buff *tx_buff;
+ u64 tx_entries;
+ int i;
+
+ if (!tx_pool || !tx_pool->tx_buff)
+ return;
+
+ tx_entries = tx_pool->num_buffers;
+
+ for (i = 0; i < tx_entries; i++) {
+ tx_buff = &tx_pool->tx_buff[i];
+ if (tx_buff && tx_buff->skb) {
+ dev_kfree_skb_any(tx_buff->skb);
+ tx_buff->skb = NULL;
+ }
+ }
+}
+
+static void clean_tx_pools(struct ibmvnic_adapter *adapter)
+{
+ int tx_scrqs;
+ int i;
+
+ if (!adapter->tx_pool || !adapter->tso_pool)
+ return;
+
+ tx_scrqs = adapter->num_active_tx_pools;
+
+ /* Free any remaining skbs in the tx buffer pools */
+ for (i = 0; i < tx_scrqs; i++) {
+ netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i);
+ clean_one_tx_pool(adapter, &adapter->tx_pool[i]);
+ clean_one_tx_pool(adapter, &adapter->tso_pool[i]);
+ }
+}
+
+static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter)
+{
+ struct net_device *netdev = adapter->netdev;
+ int i;
+
+ if (adapter->tx_scrq) {
+ for (i = 0; i < adapter->req_tx_queues; i++)
+ if (adapter->tx_scrq[i]->irq) {
+ netdev_dbg(netdev,
+ "Disabling tx_scrq[%d] irq\n", i);
+ disable_scrq_irq(adapter, adapter->tx_scrq[i]);
+ disable_irq(adapter->tx_scrq[i]->irq);
+ }
+ }
+
+ if (adapter->rx_scrq) {
+ for (i = 0; i < adapter->req_rx_queues; i++) {
+ if (adapter->rx_scrq[i]->irq) {
+ netdev_dbg(netdev,
+ "Disabling rx_scrq[%d] irq\n", i);
+ disable_scrq_irq(adapter, adapter->rx_scrq[i]);
+ disable_irq(adapter->rx_scrq[i]->irq);
+ }
+ }
+ }
+}
+
+static void ibmvnic_cleanup(struct net_device *netdev)
+{
+ struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+
+ /* ensure that transmissions are stopped if called by do_reset */
+ if (adapter->resetting)
+ netif_tx_disable(netdev);
+ else
+ netif_tx_stop_all_queues(netdev);
+
+ ibmvnic_napi_disable(adapter);
+ ibmvnic_disable_irqs(adapter);
+
+ clean_rx_pools(adapter);
+ clean_tx_pools(adapter);
+}
+
+static int __ibmvnic_close(struct net_device *netdev)
+{
+ struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+ int rc = 0;
+
+ adapter->state = VNIC_CLOSING;
+ rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
+ if (rc)
+ return rc;
+ adapter->state = VNIC_CLOSED;
+ return 0;
+}
+
+static int ibmvnic_close(struct net_device *netdev)
+{
+ struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+ int rc;
+
+ /* If device failover is pending, just set device state and return.
+ * Device operation will be handled by reset routine.
+ */
+ if (adapter->failover_pending) {
+ adapter->state = VNIC_CLOSED;
+ return 0;
+ }
+
+ rc = __ibmvnic_close(netdev);
+ ibmvnic_cleanup(netdev);
+
+ return rc;
+}
+
+/**
+ * build_hdr_data - creates L2/L3/L4 header data buffer
+ * @hdr_field - bitfield determining needed headers
+ * @skb - socket buffer
+ * @hdr_len - array of header lengths
+ * @tot_len - total length of data
+ *
+ * Reads hdr_field to determine which headers are needed by firmware.
+ * Builds a buffer containing these headers. Saves individual header
+ * lengths and total buffer length to be used to build descriptors.
+ */
+static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
+ int *hdr_len, u8 *hdr_data)
+{
+ int len = 0;
+ u8 *hdr;
+
+ if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb))
+ hdr_len[0] = sizeof(struct vlan_ethhdr);
+ else
+ hdr_len[0] = sizeof(struct ethhdr);
+
+ if (skb->protocol == htons(ETH_P_IP)) {
+ hdr_len[1] = ip_hdr(skb)->ihl * 4;
+ if (ip_hdr(skb)->protocol == IPPROTO_TCP)
+ hdr_len[2] = tcp_hdrlen(skb);
+ else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
+ hdr_len[2] = sizeof(struct udphdr);
+ } else if (skb->protocol == htons(ETH_P_IPV6)) {
+ hdr_len[1] = sizeof(struct ipv6hdr);
+ if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
+ hdr_len[2] = tcp_hdrlen(skb);
+ else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
+ hdr_len[2] = sizeof(struct udphdr);
+ } else if (skb->protocol == htons(ETH_P_ARP)) {
+ hdr_len[1] = arp_hdr_len(skb->dev);
+ hdr_len[2] = 0;
+ }
+
+ memset(hdr_data, 0, 120);
+ if ((hdr_field >> 6) & 1) {
+ hdr = skb_mac_header(skb);
+ memcpy(hdr_data, hdr, hdr_len[0]);
+ len += hdr_len[0];
+ }
+
+ if ((hdr_field >> 5) & 1) {
+ hdr = skb_network_header(skb);
+ memcpy(hdr_data + len, hdr, hdr_len[1]);
+ len += hdr_len[1];
+ }
+
+ if ((hdr_field >> 4) & 1) {
+ hdr = skb_transport_header(skb);
+ memcpy(hdr_data + len, hdr, hdr_len[2]);
+ len += hdr_len[2];
+ }
+ return len;
+}
+
+/**
+ * create_hdr_descs - create header and header extension descriptors
+ * @hdr_field - bitfield determining needed headers
+ * @data - buffer containing header data
+ * @len - length of data buffer
+ * @hdr_len - array of individual header lengths
+ * @scrq_arr - descriptor array
+ *
+ * Creates header and, if needed, header extension descriptors and
+ * places them in a descriptor array, scrq_arr
+ */
+
+static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
+ union sub_crq *scrq_arr)
+{
+ union sub_crq hdr_desc;
+ int tmp_len = len;
+ int num_descs = 0;
+ u8 *data, *cur;
+ int tmp;
+
+ while (tmp_len > 0) {
+ cur = hdr_data + len - tmp_len;
+
+ memset(&hdr_desc, 0, sizeof(hdr_desc));
+ if (cur != hdr_data) {
+ data = hdr_desc.hdr_ext.data;
+ tmp = tmp_len > 29 ? 29 : tmp_len;
+ hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
+ hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
+ hdr_desc.hdr_ext.len = tmp;
+ } else {
+ data = hdr_desc.hdr.data;
+ tmp = tmp_len > 24 ? 24 : tmp_len;
+ hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
+ hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
+ hdr_desc.hdr.len = tmp;
+ hdr_desc.hdr.l2_len = (u8)hdr_len[0];
+ hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
+ hdr_desc.hdr.l4_len = (u8)hdr_len[2];
+ hdr_desc.hdr.flag = hdr_field << 1;
+ }
+ memcpy(data, cur, tmp);
+ tmp_len -= tmp;
+ *scrq_arr = hdr_desc;
+ scrq_arr++;
+ num_descs++;
+ }
+
+ return num_descs;
+}
+
+/**
+ * build_hdr_descs_arr - build a header descriptor array
+ * @skb - socket buffer
+ * @num_entries - number of descriptors to be sent
+ * @subcrq - first TX descriptor
+ * @hdr_field - bit field determining which headers will be sent
+ *
+ * This function will build a TX descriptor array with applicable
+ * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
+ */
+
+static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
+ int *num_entries, u8 hdr_field)
+{
+ int hdr_len[3] = {0, 0, 0};
+ int tot_len;
+ u8 *hdr_data = txbuff->hdr_data;
+
+ tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
+ txbuff->hdr_data);
+ *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
+ txbuff->indir_arr + 1);
+}
+
+static int ibmvnic_xmit_workarounds(struct sk_buff *skb,
+ struct net_device *netdev)
+{
+ /* For some backing devices, mishandling of small packets
+ * can result in a loss of connection or TX stall. Device
+ * architects recommend that no packet should be smaller
+ * than the minimum MTU value provided to the driver, so
+ * pad any packets to that length
+ */
+ if (skb->len < netdev->min_mtu)
+ return skb_put_padto(skb, netdev->min_mtu);
+
+ return 0;
+}
+
+static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
+{
+ struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+ int queue_num = skb_get_queue_mapping(skb);
+ u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
+ struct device *dev = &adapter->vdev->dev;
+ struct ibmvnic_tx_buff *tx_buff = NULL;
+ struct ibmvnic_sub_crq_queue *tx_scrq;
+ struct ibmvnic_tx_pool *tx_pool;
+ unsigned int tx_send_failed = 0;
+ unsigned int tx_map_failed = 0;
+ unsigned int tx_dropped = 0;
+ unsigned int tx_packets = 0;
+ unsigned int tx_bytes = 0;
+ dma_addr_t data_dma_addr;
+ struct netdev_queue *txq;
+ unsigned long lpar_rc;
+ union sub_crq tx_crq;
+ unsigned int offset;
+ int num_entries = 1;
+ unsigned char *dst;
+ u64 *handle_array;
+ int index = 0;
+ u8 proto = 0;
+ int ret = 0;
+
+ if (adapter->resetting) {
+ if (!netif_subqueue_stopped(netdev, skb))
+ netif_stop_subqueue(netdev, queue_num);
+ dev_kfree_skb_any(skb);
+
+ tx_send_failed++;
+ tx_dropped++;
+ ret = NETDEV_TX_OK;
+ goto out;
+ }
+
+ if (ibmvnic_xmit_workarounds(skb, netdev)) {
+ tx_dropped++;
+ tx_send_failed++;
+ ret = NETDEV_TX_OK;
+ goto out;
+ }
+ if (skb_is_gso(skb))
+ tx_pool = &adapter->tso_pool[queue_num];
+ else
+ tx_pool = &adapter->tx_pool[queue_num];
+
+ tx_scrq = adapter->tx_scrq[queue_num];
+ txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
+ handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
+ be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
+
+ index = tx_pool->free_map[tx_pool->consumer_index];
+
+ if (index == IBMVNIC_INVALID_MAP) {
+ dev_kfree_skb_any(skb);
+ tx_send_failed++;
+ tx_dropped++;
+ ret = NETDEV_TX_OK;
+ goto out;
+ }
+
+ tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP;
+
+ offset = index * tx_pool->buf_size;
+ dst = tx_pool->long_term_buff.buff + offset;
+ memset(dst, 0, tx_pool->buf_size);
+ data_dma_addr = tx_pool->long_term_buff.addr + offset;
+
+ if (skb_shinfo(skb)->nr_frags) {
+ int cur, i;
+
+ /* Copy the head */
+ skb_copy_from_linear_data(skb, dst, skb_headlen(skb));
+ cur = skb_headlen(skb);
+
+ /* Copy the frags */
+ for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
+ const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
+
+ memcpy(dst + cur,
+ page_address(skb_frag_page(frag)) +
+ frag->page_offset, skb_frag_size(frag));
+ cur += skb_frag_size(frag);
+ }
+ } else {
+ skb_copy_from_linear_data(skb, dst, skb->len);
+ }
+
+ tx_pool->consumer_index =
+ (tx_pool->consumer_index + 1) % tx_pool->num_buffers;
+
+ tx_buff = &tx_pool->tx_buff[index];
+ tx_buff->skb = skb;
+ tx_buff->data_dma[0] = data_dma_addr;
+ tx_buff->data_len[0] = skb->len;
+ tx_buff->index = index;
+ tx_buff->pool_index = queue_num;
+ tx_buff->last_frag = true;
+
+ memset(&tx_crq, 0, sizeof(tx_crq));
+ tx_crq.v1.first = IBMVNIC_CRQ_CMD;
+ tx_crq.v1.type = IBMVNIC_TX_DESC;
+ tx_crq.v1.n_crq_elem = 1;
+ tx_crq.v1.n_sge = 1;
+ tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
+
+ if (skb_is_gso(skb))
+ tx_crq.v1.correlator =
+ cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK);
+ else
+ tx_crq.v1.correlator = cpu_to_be32(index);
+ tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
+ tx_crq.v1.sge_len = cpu_to_be32(skb->len);
+ tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
+
+ if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) {
+ tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
+ tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
+ }
+
+ if (skb->protocol == htons(ETH_P_IP)) {
+ tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
+ proto = ip_hdr(skb)->protocol;
+ } else if (skb->protocol == htons(ETH_P_IPV6)) {
+ tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
+ proto = ipv6_hdr(skb)->nexthdr;
+ }
+
+ if (proto == IPPROTO_TCP)
+ tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
+ else if (proto == IPPROTO_UDP)
+ tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
+
+ if (skb->ip_summed == CHECKSUM_PARTIAL) {
+ tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
+ hdrs += 2;
+ }
+ if (skb_is_gso(skb)) {
+ tx_crq.v1.flags1 |= IBMVNIC_TX_LSO;
+ tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size);
+ hdrs += 2;
+ }
+ /* determine if l2/3/4 headers are sent to firmware */
+ if ((*hdrs >> 7) & 1) {
+ build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
+ tx_crq.v1.n_crq_elem = num_entries;
+ tx_buff->num_entries = num_entries;
+ tx_buff->indir_arr[0] = tx_crq;
+ tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
+ sizeof(tx_buff->indir_arr),
+ DMA_TO_DEVICE);
+ if (dma_mapping_error(dev, tx_buff->indir_dma)) {
+ dev_kfree_skb_any(skb);
+ tx_buff->skb = NULL;
+ if (!firmware_has_feature(FW_FEATURE_CMO))
+ dev_err(dev, "tx: unable to map descriptor array\n");
+ tx_map_failed++;
+ tx_dropped++;
+ ret = NETDEV_TX_OK;
+ goto tx_err_out;
+ }
+ lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num],
+ (u64)tx_buff->indir_dma,
+ (u64)num_entries);
+ } else {
+ tx_buff->num_entries = num_entries;
+ lpar_rc = send_subcrq(adapter, handle_array[queue_num],
+ &tx_crq);
+ }
+ if (lpar_rc != H_SUCCESS) {
+ if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER)
+ dev_err_ratelimited(dev, "tx: send failed\n");
+ dev_kfree_skb_any(skb);
+ tx_buff->skb = NULL;
+
+ if (lpar_rc == H_CLOSED || adapter->failover_pending) {
+ /* Disable TX and report carrier off if queue is closed
+ * or pending failover.
+ * Firmware guarantees that a signal will be sent to the
+ * driver, triggering a reset or some other action.
+ */
+ netif_tx_stop_all_queues(netdev);
+ netif_carrier_off(netdev);
+ }
+
+ tx_send_failed++;
+ tx_dropped++;
+ ret = NETDEV_TX_OK;
+ goto tx_err_out;
+ }
+
+ if (atomic_add_return(num_entries, &tx_scrq->used)
+ >= adapter->req_tx_entries_per_subcrq) {
+ netdev_dbg(netdev, "Stopping queue %d\n", queue_num);
+ netif_stop_subqueue(netdev, queue_num);
+ }
+
+ tx_packets++;
+ tx_bytes += skb->len;
+ txq->trans_start = jiffies;
+ ret = NETDEV_TX_OK;
+ goto out;
+
+tx_err_out:
+ /* roll back consumer index and map array*/
+ if (tx_pool->consumer_index == 0)
+ tx_pool->consumer_index =
+ tx_pool->num_buffers - 1;
+ else
+ tx_pool->consumer_index--;
+ tx_pool->free_map[tx_pool->consumer_index] = index;
+out:
+ netdev->stats.tx_dropped += tx_dropped;
+ netdev->stats.tx_bytes += tx_bytes;
+ netdev->stats.tx_packets += tx_packets;
+ adapter->tx_send_failed += tx_send_failed;
+ adapter->tx_map_failed += tx_map_failed;
+ adapter->tx_stats_buffers[queue_num].packets += tx_packets;
+ adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
+ adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
+
+ return ret;
+}
+
+static void ibmvnic_set_multi(struct net_device *netdev)
+{
+ struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+ struct netdev_hw_addr *ha;
+ union ibmvnic_crq crq;
+
+ memset(&crq, 0, sizeof(crq));
+ crq.request_capability.first = IBMVNIC_CRQ_CMD;
+ crq.request_capability.cmd = REQUEST_CAPABILITY;
+
+ if (netdev->flags & IFF_PROMISC) {
+ if (!adapter->promisc_supported)
+ return;
+ } else {
+ if (netdev->flags & IFF_ALLMULTI) {
+ /* Accept all multicast */
+ memset(&crq, 0, sizeof(crq));
+ crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
+ crq.multicast_ctrl.cmd = MULTICAST_CTRL;
+ crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
+ ibmvnic_send_crq(adapter, &crq);
+ } else if (netdev_mc_empty(netdev)) {
+ /* Reject all multicast */
+ memset(&crq, 0, sizeof(crq));
+ crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
+ crq.multicast_ctrl.cmd = MULTICAST_CTRL;
+ crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
+ ibmvnic_send_crq(adapter, &crq);
+ } else {
+ /* Accept one or more multicast(s) */
+ netdev_for_each_mc_addr(ha, netdev) {
+ memset(&crq, 0, sizeof(crq));
+ crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
+ crq.multicast_ctrl.cmd = MULTICAST_CTRL;
+ crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
+ ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
+ ha->addr);
+ ibmvnic_send_crq(adapter, &crq);
+ }
+ }
+ }
+}
+
+static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p)
+{
+ struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+ struct sockaddr *addr = p;
+ union ibmvnic_crq crq;
+ int rc;
+
+ if (!is_valid_ether_addr(addr->sa_data))
+ return -EADDRNOTAVAIL;
+
+ memset(&crq, 0, sizeof(crq));
+ crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
+ crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
+ ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data);
+
+ init_completion(&adapter->fw_done);
+ rc = ibmvnic_send_crq(adapter, &crq);
+ if (rc)
+ return rc;
+ wait_for_completion(&adapter->fw_done);
+ /* netdev->dev_addr is changed in handle_change_mac_rsp function */
+ return adapter->fw_done_rc ? -EIO : 0;
+}
+
+static int ibmvnic_set_mac(struct net_device *netdev, void *p)
+{
+ struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+ struct sockaddr *addr = p;
+ int rc;
+
+ if (adapter->state == VNIC_PROBED) {
+ memcpy(&adapter->desired.mac, addr, sizeof(struct sockaddr));
+ adapter->mac_change_pending = true;
+ return 0;
+ }
+
+ rc = __ibmvnic_set_mac(netdev, addr);
+
+ return rc;
+}
+
+/**
+ * do_reset returns zero if we are able to keep processing reset events, or
+ * non-zero if we hit a fatal error and must halt.
+ */
+static int do_reset(struct ibmvnic_adapter *adapter,
+ struct ibmvnic_rwi *rwi, u32 reset_state)
+{
+ u64 old_num_rx_queues, old_num_tx_queues;
+ u64 old_num_rx_slots, old_num_tx_slots;
+ struct net_device *netdev = adapter->netdev;
+ int i, rc;
+
+ netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n",
+ rwi->reset_reason);
+
+ netif_carrier_off(netdev);
+ adapter->reset_reason = rwi->reset_reason;
+
+ old_num_rx_queues = adapter->req_rx_queues;
+ old_num_tx_queues = adapter->req_tx_queues;
+ old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq;
+ old_num_tx_slots = adapter->req_tx_entries_per_subcrq;
+
+ ibmvnic_cleanup(netdev);
+
+ if (adapter->reset_reason != VNIC_RESET_MOBILITY &&
+ adapter->reset_reason != VNIC_RESET_FAILOVER) {
+ rc = __ibmvnic_close(netdev);
+ if (rc)
+ return rc;
+ }
+
+ if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
+ adapter->wait_for_reset) {
+ release_resources(adapter);
+ release_sub_crqs(adapter, 1);
+ release_crq_queue(adapter);
+ }
+
+ if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
+ /* remove the closed state so when we call open it appears
+ * we are coming from the probed state.
+ */
+ adapter->state = VNIC_PROBED;
+
+ if (adapter->wait_for_reset) {
+ rc = init_crq_queue(adapter);
+ } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) {
+ rc = ibmvnic_reenable_crq_queue(adapter);
+ release_sub_crqs(adapter, 1);
+ } else {
+ rc = ibmvnic_reset_crq(adapter);
+ if (!rc)
+ rc = vio_enable_interrupts(adapter->vdev);
+ }
+
+ if (rc) {
+ netdev_err(adapter->netdev,
+ "Couldn't initialize crq. rc=%d\n", rc);
+ return rc;
+ }
+
+ rc = ibmvnic_reset_init(adapter);
+ if (rc)
+ return IBMVNIC_INIT_FAILED;
+
+ /* If the adapter was in PROBE state prior to the reset,
+ * exit here.
+ */
+ if (reset_state == VNIC_PROBED)
+ return 0;
+
+ rc = ibmvnic_login(netdev);
+ if (rc) {
+ adapter->state = reset_state;
+ return rc;
+ }
+
+ if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM ||
+ adapter->wait_for_reset) {
+ rc = init_resources(adapter);
+ if (rc)
+ return rc;
+ } else if (adapter->req_rx_queues != old_num_rx_queues ||
+ adapter->req_tx_queues != old_num_tx_queues ||
+ adapter->req_rx_add_entries_per_subcrq !=
+ old_num_rx_slots ||
+ adapter->req_tx_entries_per_subcrq !=
+ old_num_tx_slots) {
+ release_rx_pools(adapter);
+ release_tx_pools(adapter);
+ release_napi(adapter);
+ release_vpd_data(adapter);
+
+ rc = init_resources(adapter);
+ if (rc)
+ return rc;
+
+ } else {
+ rc = reset_tx_pools(adapter);
+ if (rc)
+ return rc;
+
+ rc = reset_rx_pools(adapter);
+ if (rc)
+ return rc;
+ }
+ ibmvnic_disable_irqs(adapter);
+ }
+ adapter->state = VNIC_CLOSED;
+
+ if (reset_state == VNIC_CLOSED)
+ return 0;
+
+ rc = __ibmvnic_open(netdev);
+ if (rc) {
+ if (list_empty(&adapter->rwi_list))
+ adapter->state = VNIC_CLOSED;
+ else
+ adapter->state = reset_state;
+
+ return 0;
+ }
+
+ /* kick napi */
+ for (i = 0; i < adapter->req_rx_queues; i++)
+ napi_schedule(&adapter->napi[i]);
+
+ if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
+ adapter->reset_reason != VNIC_RESET_CHANGE_PARAM)
+ netdev_notify_peers(netdev);
+
+ netif_carrier_on(netdev);
+
+ return 0;
+}
+
+static int do_hard_reset(struct ibmvnic_adapter *adapter,
+ struct ibmvnic_rwi *rwi, u32 reset_state)
+{
+ struct net_device *netdev = adapter->netdev;
+ int rc;
+
+ netdev_dbg(adapter->netdev, "Hard resetting driver (%d)\n",
+ rwi->reset_reason);
+
+ netif_carrier_off(netdev);
+ adapter->reset_reason = rwi->reset_reason;
+
+ ibmvnic_cleanup(netdev);
+ release_resources(adapter);
+ release_sub_crqs(adapter, 0);
+ release_crq_queue(adapter);
+
+ /* remove the closed state so when we call open it appears
+ * we are coming from the probed state.
+ */
+ adapter->state = VNIC_PROBED;
+
+ rc = init_crq_queue(adapter);
+ if (rc) {
+ netdev_err(adapter->netdev,
+ "Couldn't initialize crq. rc=%d\n", rc);
+ return rc;
+ }
+
+ rc = ibmvnic_init(adapter);
+ if (rc)
+ return rc;
+
+ /* If the adapter was in PROBE state prior to the reset,
+ * exit here.
+ */
+ if (reset_state == VNIC_PROBED)
+ return 0;
+
+ rc = ibmvnic_login(netdev);
+ if (rc) {
+ adapter->state = VNIC_PROBED;
+ return 0;
+ }
+
+ rc = init_resources(adapter);
+ if (rc)
+ return rc;
+
+ ibmvnic_disable_irqs(adapter);
+ adapter->state = VNIC_CLOSED;
+
+ if (reset_state == VNIC_CLOSED)
+ return 0;
+
+ rc = __ibmvnic_open(netdev);
+ if (rc) {
+ if (list_empty(&adapter->rwi_list))
+ adapter->state = VNIC_CLOSED;
+ else
+ adapter->state = reset_state;
+
+ return 0;
+ }
+
+ netif_carrier_on(netdev);
+
+ return 0;
+}
+
+static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
+{
+ struct ibmvnic_rwi *rwi;
+
+ mutex_lock(&adapter->rwi_lock);
+
+ if (!list_empty(&adapter->rwi_list)) {
+ rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
+ list);
+ list_del(&rwi->list);
+ } else {
+ rwi = NULL;
+ }
+
+ mutex_unlock(&adapter->rwi_lock);
+ return rwi;
+}
+
+static void free_all_rwi(struct ibmvnic_adapter *adapter)
+{
+ struct ibmvnic_rwi *rwi;
+
+ rwi = get_next_rwi(adapter);
+ while (rwi) {
+ kfree(rwi);
+ rwi = get_next_rwi(adapter);
+ }
+}
+
+static void __ibmvnic_reset(struct work_struct *work)
+{
+ struct ibmvnic_rwi *rwi;
+ struct ibmvnic_adapter *adapter;
+ struct net_device *netdev;
+ bool we_lock_rtnl = false;
+ u32 reset_state;
+ int rc = 0;
+
+ adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
+ netdev = adapter->netdev;
+
+ /* netif_set_real_num_xx_queues needs to take rtnl lock here
+ * unless wait_for_reset is set, in which case the rtnl lock
+ * has already been taken before initializing the reset
+ */
+ if (!adapter->wait_for_reset) {
+ rtnl_lock();
+ we_lock_rtnl = true;
+ }
+ reset_state = adapter->state;
+
+ rwi = get_next_rwi(adapter);
+ while (rwi) {
+ if (adapter->force_reset_recovery) {
+ adapter->force_reset_recovery = false;
+ rc = do_hard_reset(adapter, rwi, reset_state);
+ } else {
+ rc = do_reset(adapter, rwi, reset_state);
+ }
+ kfree(rwi);
+ if (rc && rc != IBMVNIC_INIT_FAILED &&
+ !adapter->force_reset_recovery)
+ break;
+
+ rwi = get_next_rwi(adapter);
+ }
+
+ if (adapter->wait_for_reset) {
+ adapter->wait_for_reset = false;
+ adapter->reset_done_rc = rc;
+ complete(&adapter->reset_done);
+ }
+
+ if (rc) {
+ netdev_dbg(adapter->netdev, "Reset failed\n");
+ free_all_rwi(adapter);
+ }
+
+ adapter->resetting = false;
+ if (we_lock_rtnl)
+ rtnl_unlock();
+}
+
+static int ibmvnic_reset(struct ibmvnic_adapter *adapter,
+ enum ibmvnic_reset_reason reason)
+{
+ struct list_head *entry, *tmp_entry;
+ struct ibmvnic_rwi *rwi, *tmp;
+ struct net_device *netdev = adapter->netdev;
+ int ret;
+
+ if (adapter->state == VNIC_REMOVING ||
+ adapter->state == VNIC_REMOVED ||
+ adapter->failover_pending) {
+ ret = EBUSY;
+ netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n");
+ goto err;
+ }
+
+ if (adapter->state == VNIC_PROBING) {
+ netdev_warn(netdev, "Adapter reset during probe\n");
+ ret = adapter->init_done_rc = EAGAIN;
+ goto err;
+ }
+
+ mutex_lock(&adapter->rwi_lock);
+
+ list_for_each(entry, &adapter->rwi_list) {
+ tmp = list_entry(entry, struct ibmvnic_rwi, list);
+ if (tmp->reset_reason == reason) {
+ netdev_dbg(netdev, "Skipping matching reset\n");
+ mutex_unlock(&adapter->rwi_lock);
+ ret = EBUSY;
+ goto err;
+ }
+ }
+
+ rwi = kzalloc(sizeof(*rwi), GFP_KERNEL);
+ if (!rwi) {
+ mutex_unlock(&adapter->rwi_lock);
+ ibmvnic_close(netdev);
+ ret = ENOMEM;
+ goto err;
+ }
+ /* if we just received a transport event,
+ * flush reset queue and process this reset
+ */
+ if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) {
+ list_for_each_safe(entry, tmp_entry, &adapter->rwi_list)
+ list_del(entry);
+ }
+ rwi->reset_reason = reason;
+ list_add_tail(&rwi->list, &adapter->rwi_list);
+ mutex_unlock(&adapter->rwi_lock);
+ adapter->resetting = true;
+ netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason);
+ schedule_work(&adapter->ibmvnic_reset);
+
+ return 0;
+err:
+ if (adapter->wait_for_reset)
+ adapter->wait_for_reset = false;
+ return -ret;
+}
+
+static void ibmvnic_tx_timeout(struct net_device *dev)
+{
+ struct ibmvnic_adapter *adapter = netdev_priv(dev);
+
+ ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
+}
+
+static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
+ struct ibmvnic_rx_buff *rx_buff)
+{
+ struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
+
+ rx_buff->skb = NULL;
+
+ pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
+ pool->next_alloc = (pool->next_alloc + 1) % pool->size;
+
+ atomic_dec(&pool->available);
+}
+
+static int ibmvnic_poll(struct napi_struct *napi, int budget)
+{
+ struct net_device *netdev = napi->dev;
+ struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+ int scrq_num = (int)(napi - adapter->napi);
+ int frames_processed = 0;
+
+restart_poll:
+ while (frames_processed < budget) {
+ struct sk_buff *skb;
+ struct ibmvnic_rx_buff *rx_buff;
+ union sub_crq *next;
+ u32 length;
+ u16 offset;
+ u8 flags = 0;
+
+ if (unlikely(adapter->resetting &&
+ adapter->reset_reason != VNIC_RESET_NON_FATAL)) {
+ enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
+ napi_complete_done(napi, frames_processed);
+ return frames_processed;
+ }
+
+ if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
+ break;
+ next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
+ rx_buff =
+ (struct ibmvnic_rx_buff *)be64_to_cpu(next->
+ rx_comp.correlator);
+ /* do error checking */
+ if (next->rx_comp.rc) {
+ netdev_dbg(netdev, "rx buffer returned with rc %x\n",
+ be16_to_cpu(next->rx_comp.rc));
+ /* free the entry */
+ next->rx_comp.first = 0;
+ dev_kfree_skb_any(rx_buff->skb);
+ remove_buff_from_pool(adapter, rx_buff);
+ continue;
+ } else if (!rx_buff->skb) {
+ /* free the entry */
+ next->rx_comp.first = 0;
+ remove_buff_from_pool(adapter, rx_buff);
+ continue;
+ }
+
+ length = be32_to_cpu(next->rx_comp.len);
+ offset = be16_to_cpu(next->rx_comp.off_frame_data);
+ flags = next->rx_comp.flags;
+ skb = rx_buff->skb;
+ skb_copy_to_linear_data(skb, rx_buff->data + offset,
+ length);
+
+ /* VLAN Header has been stripped by the system firmware and
+ * needs to be inserted by the driver
+ */
+ if (adapter->rx_vlan_header_insertion &&
+ (flags & IBMVNIC_VLAN_STRIPPED))
+ __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
+ ntohs(next->rx_comp.vlan_tci));
+
+ /* free the entry */
+ next->rx_comp.first = 0;
+ remove_buff_from_pool(adapter, rx_buff);
+
+ skb_put(skb, length);
+ skb->protocol = eth_type_trans(skb, netdev);
+ skb_record_rx_queue(skb, scrq_num);
+
+ if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
+ flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+ }
+
+ length = skb->len;
+ napi_gro_receive(napi, skb); /* send it up */
+ netdev->stats.rx_packets++;
+ netdev->stats.rx_bytes += length;
+ adapter->rx_stats_buffers[scrq_num].packets++;
+ adapter->rx_stats_buffers[scrq_num].bytes += length;
+ frames_processed++;
+ }
+
+ if (adapter->state != VNIC_CLOSING)
+ replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
+
+ if (frames_processed < budget) {
+ enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
+ napi_complete_done(napi, frames_processed);
+ if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
+ napi_reschedule(napi)) {
+ disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
+ goto restart_poll;
+ }
+ }
+ return frames_processed;
+}
+
+static int wait_for_reset(struct ibmvnic_adapter *adapter)
+{
+ int rc, ret;
+
+ adapter->fallback.mtu = adapter->req_mtu;
+ adapter->fallback.rx_queues = adapter->req_rx_queues;
+ adapter->fallback.tx_queues = adapter->req_tx_queues;
+ adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq;
+ adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq;
+
+ init_completion(&adapter->reset_done);
+ adapter->wait_for_reset = true;
+ rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
+ if (rc)
+ return rc;
+ wait_for_completion(&adapter->reset_done);
+
+ ret = 0;
+ if (adapter->reset_done_rc) {
+ ret = -EIO;
+ adapter->desired.mtu = adapter->fallback.mtu;
+ adapter->desired.rx_queues = adapter->fallback.rx_queues;
+ adapter->desired.tx_queues = adapter->fallback.tx_queues;
+ adapter->desired.rx_entries = adapter->fallback.rx_entries;
+ adapter->desired.tx_entries = adapter->fallback.tx_entries;
+
+ init_completion(&adapter->reset_done);
+ adapter->wait_for_reset = true;
+ rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
+ if (rc)
+ return ret;
+ wait_for_completion(&adapter->reset_done);
+ }
+ adapter->wait_for_reset = false;
+
+ return ret;
+}
+
+static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
+{
+ struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+
+ adapter->desired.mtu = new_mtu + ETH_HLEN;
+
+ return wait_for_reset(adapter);
+}
+
+static netdev_features_t ibmvnic_features_check(struct sk_buff *skb,
+ struct net_device *dev,
+ netdev_features_t features)
+{
+ /* Some backing hardware adapters can not
+ * handle packets with a MSS less than 224
+ * or with only one segment.
+ */
+ if (skb_is_gso(skb)) {
+ if (skb_shinfo(skb)->gso_size < 224 ||
+ skb_shinfo(skb)->gso_segs == 1)
+ features &= ~NETIF_F_GSO_MASK;
+ }
+
+ return features;
+}
+
+static const struct net_device_ops ibmvnic_netdev_ops = {
+ .ndo_open = ibmvnic_open,
+ .ndo_stop = ibmvnic_close,
+ .ndo_start_xmit = ibmvnic_xmit,
+ .ndo_set_rx_mode = ibmvnic_set_multi,
+ .ndo_set_mac_address = ibmvnic_set_mac,
+ .ndo_validate_addr = eth_validate_addr,
+ .ndo_tx_timeout = ibmvnic_tx_timeout,
+ .ndo_change_mtu = ibmvnic_change_mtu,
+ .ndo_features_check = ibmvnic_features_check,
+};
+
+/* ethtool functions */
+
+static int ibmvnic_get_link_ksettings(struct net_device *netdev,
+ struct ethtool_link_ksettings *cmd)
+{
+ u32 supported, advertising;
+
+ supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
+ SUPPORTED_FIBRE);
+ advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg |
+ ADVERTISED_FIBRE);
+ cmd->base.speed = SPEED_1000;
+ cmd->base.duplex = DUPLEX_FULL;
+ cmd->base.port = PORT_FIBRE;
+ cmd->base.phy_address = 0;
+ cmd->base.autoneg = AUTONEG_ENABLE;
+
+ ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
+ supported);
+ ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
+ advertising);
+
+ return 0;
+}
+
+static void ibmvnic_get_drvinfo(struct net_device *netdev,
+ struct ethtool_drvinfo *info)
+{
+ struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+
+ strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
+ strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
+ strlcpy(info->fw_version, adapter->fw_version,
+ sizeof(info->fw_version));
+}
+
+static u32 ibmvnic_get_msglevel(struct net_device *netdev)
+{
+ struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+
+ return adapter->msg_enable;
+}
+
+static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
+{
+ struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+
+ adapter->msg_enable = data;
+}
+
+static u32 ibmvnic_get_link(struct net_device *netdev)
+{
+ struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+
+ /* Don't need to send a query because we request a logical link up at
+ * init and then we wait for link state indications
+ */
+ return adapter->logical_link_state;
+}
+
+static void ibmvnic_get_ringparam(struct net_device *netdev,
+ struct ethtool_ringparam *ring)
+{
+ struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+
+ ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
+ ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
+ ring->rx_mini_max_pending = 0;
+ ring->rx_jumbo_max_pending = 0;
+ ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
+ ring->tx_pending = adapter->req_tx_entries_per_subcrq;
+ ring->rx_mini_pending = 0;
+ ring->rx_jumbo_pending = 0;
+}
+
+static int ibmvnic_set_ringparam(struct net_device *netdev,
+ struct ethtool_ringparam *ring)
+{
+ struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+
+ if (ring->rx_pending > adapter->max_rx_add_entries_per_subcrq ||
+ ring->tx_pending > adapter->max_tx_entries_per_subcrq) {
+ netdev_err(netdev, "Invalid request.\n");
+ netdev_err(netdev, "Max tx buffers = %llu\n",
+ adapter->max_rx_add_entries_per_subcrq);
+ netdev_err(netdev, "Max rx buffers = %llu\n",
+ adapter->max_tx_entries_per_subcrq);
+ return -EINVAL;
+ }
+
+ adapter->desired.rx_entries = ring->rx_pending;
+ adapter->desired.tx_entries = ring->tx_pending;
+
+ return wait_for_reset(adapter);
+}
+
+static void ibmvnic_get_channels(struct net_device *netdev,
+ struct ethtool_channels *channels)
+{
+ struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+
+ channels->max_rx = adapter->max_rx_queues;
+ channels->max_tx = adapter->max_tx_queues;
+ channels->max_other = 0;
+ channels->max_combined = 0;
+ channels->rx_count = adapter->req_rx_queues;
+ channels->tx_count = adapter->req_tx_queues;
+ channels->other_count = 0;
+ channels->combined_count = 0;
+}
+
+static int ibmvnic_set_channels(struct net_device *netdev,
+ struct ethtool_channels *channels)
+{
+ struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+
+ adapter->desired.rx_queues = channels->rx_count;
+ adapter->desired.tx_queues = channels->tx_count;
+
+ return wait_for_reset(adapter);
+}
+
+static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
+{
+ struct ibmvnic_adapter *adapter = netdev_priv(dev);
+ int i;
+
+ if (stringset != ETH_SS_STATS)
+ return;
+
+ for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
+ memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
+
+ for (i = 0; i < adapter->req_tx_queues; i++) {
+ snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
+ data += ETH_GSTRING_LEN;
+
+ snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
+ data += ETH_GSTRING_LEN;
+
+ snprintf(data, ETH_GSTRING_LEN, "tx%d_dropped_packets", i);
+ data += ETH_GSTRING_LEN;
+ }
+
+ for (i = 0; i < adapter->req_rx_queues; i++) {
+ snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i);
+ data += ETH_GSTRING_LEN;
+
+ snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i);
+ data += ETH_GSTRING_LEN;
+
+ snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i);
+ data += ETH_GSTRING_LEN;
+ }
+}
+
+static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
+{
+ struct ibmvnic_adapter *adapter = netdev_priv(dev);
+
+ switch (sset) {
+ case ETH_SS_STATS:
+ return ARRAY_SIZE(ibmvnic_stats) +
+ adapter->req_tx_queues * NUM_TX_STATS +
+ adapter->req_rx_queues * NUM_RX_STATS;
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static void ibmvnic_get_ethtool_stats(struct net_device *dev,
+ struct ethtool_stats *stats, u64 *data)
+{
+ struct ibmvnic_adapter *adapter = netdev_priv(dev);
+ union ibmvnic_crq crq;
+ int i, j;
+ int rc;
+
+ memset(&crq, 0, sizeof(crq));
+ crq.request_statistics.first = IBMVNIC_CRQ_CMD;
+ crq.request_statistics.cmd = REQUEST_STATISTICS;
+ crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
+ crq.request_statistics.len =
+ cpu_to_be32(sizeof(struct ibmvnic_statistics));
+
+ /* Wait for data to be written */
+ init_completion(&adapter->stats_done);
+ rc = ibmvnic_send_crq(adapter, &crq);
+ if (rc)
+ return;
+ wait_for_completion(&adapter->stats_done);
+
+ for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
+ data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter,
+ ibmvnic_stats[i].offset));
+
+ for (j = 0; j < adapter->req_tx_queues; j++) {
+ data[i] = adapter->tx_stats_buffers[j].packets;
+ i++;
+ data[i] = adapter->tx_stats_buffers[j].bytes;
+ i++;
+ data[i] = adapter->tx_stats_buffers[j].dropped_packets;
+ i++;
+ }
+
+ for (j = 0; j < adapter->req_rx_queues; j++) {
+ data[i] = adapter->rx_stats_buffers[j].packets;
+ i++;
+ data[i] = adapter->rx_stats_buffers[j].bytes;
+ i++;
+ data[i] = adapter->rx_stats_buffers[j].interrupts;
+ i++;
+ }
+}
+
+static const struct ethtool_ops ibmvnic_ethtool_ops = {
+ .get_drvinfo = ibmvnic_get_drvinfo,
+ .get_msglevel = ibmvnic_get_msglevel,
+ .set_msglevel = ibmvnic_set_msglevel,
+ .get_link = ibmvnic_get_link,
+ .get_ringparam = ibmvnic_get_ringparam,
+ .set_ringparam = ibmvnic_set_ringparam,
+ .get_channels = ibmvnic_get_channels,
+ .set_channels = ibmvnic_set_channels,
+ .get_strings = ibmvnic_get_strings,
+ .get_sset_count = ibmvnic_get_sset_count,
+ .get_ethtool_stats = ibmvnic_get_ethtool_stats,
+ .get_link_ksettings = ibmvnic_get_link_ksettings,
+};
+
+/* Routines for managing CRQs/sCRQs */
+
+static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
+ struct ibmvnic_sub_crq_queue *scrq)
+{
+ int rc;
+
+ if (scrq->irq) {
+ free_irq(scrq->irq, scrq);
+ irq_dispose_mapping(scrq->irq);
+ scrq->irq = 0;
+ }
+
+ memset(scrq->msgs, 0, 4 * PAGE_SIZE);
+ atomic_set(&scrq->used, 0);
+ scrq->cur = 0;
+
+ rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
+ 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
+ return rc;
+}
+
+static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
+{
+ int i, rc;
+
+ for (i = 0; i < adapter->req_tx_queues; i++) {
+ netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
+ rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
+ if (rc)
+ return rc;
+ }
+
+ for (i = 0; i < adapter->req_rx_queues; i++) {
+ netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
+ rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
+ if (rc)
+ return rc;
+ }
+
+ return rc;
+}
+
+static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
+ struct ibmvnic_sub_crq_queue *scrq,
+ bool do_h_free)
+{
+ struct device *dev = &adapter->vdev->dev;
+ long rc;
+
+ netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
+
+ if (do_h_free) {
+ /* Close the sub-crqs */
+ do {
+ rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
+ adapter->vdev->unit_address,
+ scrq->crq_num);
+ } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
+
+ if (rc) {
+ netdev_err(adapter->netdev,
+ "Failed to release sub-CRQ %16lx, rc = %ld\n",
+ scrq->crq_num, rc);
+ }
+ }
+
+ dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
+ DMA_BIDIRECTIONAL);
+ free_pages((unsigned long)scrq->msgs, 2);
+ kfree(scrq);
+}
+
+static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
+ *adapter)
+{
+ struct device *dev = &adapter->vdev->dev;
+ struct ibmvnic_sub_crq_queue *scrq;
+ int rc;
+
+ scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
+ if (!scrq)
+ return NULL;
+
+ scrq->msgs =
+ (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
+ if (!scrq->msgs) {
+ dev_warn(dev, "Couldn't allocate crq queue messages page\n");
+ goto zero_page_failed;
+ }
+
+ scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
+ DMA_BIDIRECTIONAL);
+ if (dma_mapping_error(dev, scrq->msg_token)) {
+ dev_warn(dev, "Couldn't map crq queue messages page\n");
+ goto map_failed;
+ }
+
+ rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
+ 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
+
+ if (rc == H_RESOURCE)
+ rc = ibmvnic_reset_crq(adapter);
+
+ if (rc == H_CLOSED) {
+ dev_warn(dev, "Partner adapter not ready, waiting.\n");
+ } else if (rc) {
+ dev_warn(dev, "Error %d registering sub-crq\n", rc);
+ goto reg_failed;
+ }
+
+ scrq->adapter = adapter;
+ scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
+ spin_lock_init(&scrq->lock);
+
+ netdev_dbg(adapter->netdev,
+ "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
+ scrq->crq_num, scrq->hw_irq, scrq->irq);
+
+ return scrq;
+
+reg_failed:
+ dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
+ DMA_BIDIRECTIONAL);
+map_failed:
+ free_pages((unsigned long)scrq->msgs, 2);
+zero_page_failed:
+ kfree(scrq);
+
+ return NULL;
+}
+
+static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free)
+{
+ int i;
+
+ if (adapter->tx_scrq) {
+ for (i = 0; i < adapter->num_active_tx_scrqs; i++) {
+ if (!adapter->tx_scrq[i])
+ continue;
+
+ netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
+ i);
+ if (adapter->tx_scrq[i]->irq) {
+ free_irq(adapter->tx_scrq[i]->irq,
+ adapter->tx_scrq[i]);
+ irq_dispose_mapping(adapter->tx_scrq[i]->irq);
+ adapter->tx_scrq[i]->irq = 0;
+ }
+
+ release_sub_crq_queue(adapter, adapter->tx_scrq[i],
+ do_h_free);
+ }
+
+ kfree(adapter->tx_scrq);
+ adapter->tx_scrq = NULL;
+ adapter->num_active_tx_scrqs = 0;
+ }
+
+ if (adapter->rx_scrq) {
+ for (i = 0; i < adapter->num_active_rx_scrqs; i++) {
+ if (!adapter->rx_scrq[i])
+ continue;
+
+ netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
+ i);
+ if (adapter->rx_scrq[i]->irq) {
+ free_irq(adapter->rx_scrq[i]->irq,
+ adapter->rx_scrq[i]);
+ irq_dispose_mapping(adapter->rx_scrq[i]->irq);
+ adapter->rx_scrq[i]->irq = 0;
+ }
+
+ release_sub_crq_queue(adapter, adapter->rx_scrq[i],
+ do_h_free);
+ }
+
+ kfree(adapter->rx_scrq);
+ adapter->rx_scrq = NULL;
+ adapter->num_active_rx_scrqs = 0;
+ }
+}
+
+static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
+ struct ibmvnic_sub_crq_queue *scrq)
+{
+ struct device *dev = &adapter->vdev->dev;
+ unsigned long rc;
+
+ rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
+ H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
+ if (rc)
+ dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
+ scrq->hw_irq, rc);
+ return rc;
+}
+
+static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
+ struct ibmvnic_sub_crq_queue *scrq)
+{
+ struct device *dev = &adapter->vdev->dev;
+ unsigned long rc;
+
+ if (scrq->hw_irq > 0x100000000ULL) {
+ dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
+ return 1;
+ }
+
+ if (adapter->resetting &&
+ adapter->reset_reason == VNIC_RESET_MOBILITY) {
+ u64 val = (0xff000000) | scrq->hw_irq;
+
+ rc = plpar_hcall_norets(H_EOI, val);
+ if (rc)
+ dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n",
+ val, rc);
+ }
+
+ rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
+ H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
+ if (rc)
+ dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
+ scrq->hw_irq, rc);
+ return rc;
+}
+
+static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
+ struct ibmvnic_sub_crq_queue *scrq)
+{
+ struct device *dev = &adapter->vdev->dev;
+ struct ibmvnic_tx_pool *tx_pool;
+ struct ibmvnic_tx_buff *txbuff;
+ union sub_crq *next;
+ int index;
+ int i, j;
+ u8 *first;
+
+restart_loop:
+ while (pending_scrq(adapter, scrq)) {
+ unsigned int pool = scrq->pool_index;
+ int num_entries = 0;
+
+ next = ibmvnic_next_scrq(adapter, scrq);
+ for (i = 0; i < next->tx_comp.num_comps; i++) {
+ if (next->tx_comp.rcs[i]) {
+ dev_err(dev, "tx error %x\n",
+ next->tx_comp.rcs[i]);
+ continue;
+ }
+ index = be32_to_cpu(next->tx_comp.correlators[i]);
+ if (index & IBMVNIC_TSO_POOL_MASK) {
+ tx_pool = &adapter->tso_pool[pool];
+ index &= ~IBMVNIC_TSO_POOL_MASK;
+ } else {
+ tx_pool = &adapter->tx_pool[pool];
+ }
+
+ txbuff = &tx_pool->tx_buff[index];
+
+ for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
+ if (!txbuff->data_dma[j])
+ continue;
+
+ txbuff->data_dma[j] = 0;
+ }
+ /* if sub_crq was sent indirectly */
+ first = &txbuff->indir_arr[0].generic.first;
+ if (*first == IBMVNIC_CRQ_CMD) {
+ dma_unmap_single(dev, txbuff->indir_dma,
+ sizeof(txbuff->indir_arr),
+ DMA_TO_DEVICE);
+ *first = 0;
+ }
+
+ if (txbuff->last_frag) {
+ dev_kfree_skb_any(txbuff->skb);
+ txbuff->skb = NULL;
+ }
+
+ num_entries += txbuff->num_entries;
+
+ tx_pool->free_map[tx_pool->producer_index] = index;
+ tx_pool->producer_index =
+ (tx_pool->producer_index + 1) %
+ tx_pool->num_buffers;
+ }
+ /* remove tx_comp scrq*/
+ next->tx_comp.first = 0;
+
+ if (atomic_sub_return(num_entries, &scrq->used) <=
+ (adapter->req_tx_entries_per_subcrq / 2) &&
+ __netif_subqueue_stopped(adapter->netdev,
+ scrq->pool_index)) {
+ netif_wake_subqueue(adapter->netdev, scrq->pool_index);
+ netdev_dbg(adapter->netdev, "Started queue %d\n",
+ scrq->pool_index);
+ }
+ }
+
+ enable_scrq_irq(adapter, scrq);
+
+ if (pending_scrq(adapter, scrq)) {
+ disable_scrq_irq(adapter, scrq);
+ goto restart_loop;
+ }
+
+ return 0;
+}
+
+static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
+{
+ struct ibmvnic_sub_crq_queue *scrq = instance;
+ struct ibmvnic_adapter *adapter = scrq->adapter;
+
+ disable_scrq_irq(adapter, scrq);
+ ibmvnic_complete_tx(adapter, scrq);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
+{
+ struct ibmvnic_sub_crq_queue *scrq = instance;
+ struct ibmvnic_adapter *adapter = scrq->adapter;
+
+ /* When booting a kdump kernel we can hit pending interrupts
+ * prior to completing driver initialization.
+ */
+ if (unlikely(adapter->state != VNIC_OPEN))
+ return IRQ_NONE;
+
+ adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
+
+ if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
+ disable_scrq_irq(adapter, scrq);
+ __napi_schedule(&adapter->napi[scrq->scrq_num]);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
+{
+ struct device *dev = &adapter->vdev->dev;
+ struct ibmvnic_sub_crq_queue *scrq;
+ int i = 0, j = 0;
+ int rc = 0;
+
+ for (i = 0; i < adapter->req_tx_queues; i++) {
+ netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
+ i);
+ scrq = adapter->tx_scrq[i];
+ scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
+
+ if (!scrq->irq) {
+ rc = -EINVAL;
+ dev_err(dev, "Error mapping irq\n");
+ goto req_tx_irq_failed;
+ }
+
+ rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
+ 0, "ibmvnic_tx", scrq);
+
+ if (rc) {
+ dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
+ scrq->irq, rc);
+ irq_dispose_mapping(scrq->irq);
+ goto req_tx_irq_failed;
+ }
+ }
+
+ for (i = 0; i < adapter->req_rx_queues; i++) {
+ netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
+ i);
+ scrq = adapter->rx_scrq[i];
+ scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
+ if (!scrq->irq) {
+ rc = -EINVAL;
+ dev_err(dev, "Error mapping irq\n");
+ goto req_rx_irq_failed;
+ }
+ rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
+ 0, "ibmvnic_rx", scrq);
+ if (rc) {
+ dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
+ scrq->irq, rc);
+ irq_dispose_mapping(scrq->irq);
+ goto req_rx_irq_failed;
+ }
+ }
+ return rc;
+
+req_rx_irq_failed:
+ for (j = 0; j < i; j++) {
+ free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
+ irq_dispose_mapping(adapter->rx_scrq[j]->irq);
+ }
+ i = adapter->req_tx_queues;
+req_tx_irq_failed:
+ for (j = 0; j < i; j++) {
+ free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
+ irq_dispose_mapping(adapter->rx_scrq[j]->irq);
+ }
+ release_sub_crqs(adapter, 1);
+ return rc;
+}
+
+static int init_sub_crqs(struct ibmvnic_adapter *adapter)
+{
+ struct device *dev = &adapter->vdev->dev;
+ struct ibmvnic_sub_crq_queue **allqueues;
+ int registered_queues = 0;
+ int total_queues;
+ int more = 0;
+ int i;
+
+ total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
+
+ allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
+ if (!allqueues)
+ return -1;
+
+ for (i = 0; i < total_queues; i++) {
+ allqueues[i] = init_sub_crq_queue(adapter);
+ if (!allqueues[i]) {
+ dev_warn(dev, "Couldn't allocate all sub-crqs\n");
+ break;
+ }
+ registered_queues++;
+ }
+
+ /* Make sure we were able to register the minimum number of queues */
+ if (registered_queues <
+ adapter->min_tx_queues + adapter->min_rx_queues) {
+ dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
+ goto tx_failed;
+ }
+
+ /* Distribute the failed allocated queues*/
+ for (i = 0; i < total_queues - registered_queues + more ; i++) {
+ netdev_dbg(adapter->netdev, "Reducing number of queues\n");
+ switch (i % 3) {
+ case 0:
+ if (adapter->req_rx_queues > adapter->min_rx_queues)
+ adapter->req_rx_queues--;
+ else
+ more++;
+ break;
+ case 1:
+ if (adapter->req_tx_queues > adapter->min_tx_queues)
+ adapter->req_tx_queues--;
+ else
+ more++;
+ break;
+ }
+ }
+
+ adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
+ sizeof(*adapter->tx_scrq), GFP_KERNEL);
+ if (!adapter->tx_scrq)
+ goto tx_failed;
+
+ for (i = 0; i < adapter->req_tx_queues; i++) {
+ adapter->tx_scrq[i] = allqueues[i];
+ adapter->tx_scrq[i]->pool_index = i;
+ adapter->num_active_tx_scrqs++;
+ }
+
+ adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
+ sizeof(*adapter->rx_scrq), GFP_KERNEL);
+ if (!adapter->rx_scrq)
+ goto rx_failed;
+
+ for (i = 0; i < adapter->req_rx_queues; i++) {
+ adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
+ adapter->rx_scrq[i]->scrq_num = i;
+ adapter->num_active_rx_scrqs++;
+ }
+
+ kfree(allqueues);
+ return 0;
+
+rx_failed:
+ kfree(adapter->tx_scrq);
+ adapter->tx_scrq = NULL;
+tx_failed:
+ for (i = 0; i < registered_queues; i++)
+ release_sub_crq_queue(adapter, allqueues[i], 1);
+ kfree(allqueues);
+ return -1;
+}
+
+static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry)
+{
+ struct device *dev = &adapter->vdev->dev;
+ union ibmvnic_crq crq;
+ int max_entries;
+
+ if (!retry) {
+ /* Sub-CRQ entries are 32 byte long */
+ int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
+
+ if (adapter->min_tx_entries_per_subcrq > entries_page ||
+ adapter->min_rx_add_entries_per_subcrq > entries_page) {
+ dev_err(dev, "Fatal, invalid entries per sub-crq\n");
+ return;
+ }
+
+ if (adapter->desired.mtu)
+ adapter->req_mtu = adapter->desired.mtu;
+ else
+ adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
+
+ if (!adapter->desired.tx_entries)
+ adapter->desired.tx_entries =
+ adapter->max_tx_entries_per_subcrq;
+ if (!adapter->desired.rx_entries)
+ adapter->desired.rx_entries =
+ adapter->max_rx_add_entries_per_subcrq;
+
+ max_entries = IBMVNIC_MAX_LTB_SIZE /
+ (adapter->req_mtu + IBMVNIC_BUFFER_HLEN);
+
+ if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
+ adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) {
+ adapter->desired.tx_entries = max_entries;
+ }
+
+ if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
+ adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) {
+ adapter->desired.rx_entries = max_entries;
+ }
+
+ if (adapter->desired.tx_entries)
+ adapter->req_tx_entries_per_subcrq =
+ adapter->desired.tx_entries;
+ else
+ adapter->req_tx_entries_per_subcrq =
+ adapter->max_tx_entries_per_subcrq;
+
+ if (adapter->desired.rx_entries)
+ adapter->req_rx_add_entries_per_subcrq =
+ adapter->desired.rx_entries;
+ else
+ adapter->req_rx_add_entries_per_subcrq =
+ adapter->max_rx_add_entries_per_subcrq;
+
+ if (adapter->desired.tx_queues)
+ adapter->req_tx_queues =
+ adapter->desired.tx_queues;
+ else
+ adapter->req_tx_queues =
+ adapter->opt_tx_comp_sub_queues;
+
+ if (adapter->desired.rx_queues)
+ adapter->req_rx_queues =
+ adapter->desired.rx_queues;
+ else
+ adapter->req_rx_queues =
+ adapter->opt_rx_comp_queues;
+
+ adapter->req_rx_add_queues = adapter->max_rx_add_queues;
+ }
+
+ memset(&crq, 0, sizeof(crq));
+ crq.request_capability.first = IBMVNIC_CRQ_CMD;
+ crq.request_capability.cmd = REQUEST_CAPABILITY;
+
+ crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
+ crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
+ atomic_inc(&adapter->running_cap_crqs);
+ ibmvnic_send_crq(adapter, &crq);
+
+ crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
+ crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
+ atomic_inc(&adapter->running_cap_crqs);
+ ibmvnic_send_crq(adapter, &crq);
+
+ crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
+ crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
+ atomic_inc(&adapter->running_cap_crqs);
+ ibmvnic_send_crq(adapter, &crq);
+
+ crq.request_capability.capability =
+ cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
+ crq.request_capability.number =
+ cpu_to_be64(adapter->req_tx_entries_per_subcrq);
+ atomic_inc(&adapter->running_cap_crqs);
+ ibmvnic_send_crq(adapter, &crq);
+
+ crq.request_capability.capability =
+ cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
+ crq.request_capability.number =
+ cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
+ atomic_inc(&adapter->running_cap_crqs);
+ ibmvnic_send_crq(adapter, &crq);
+
+ crq.request_capability.capability = cpu_to_be16(REQ_MTU);
+ crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
+ atomic_inc(&adapter->running_cap_crqs);
+ ibmvnic_send_crq(adapter, &crq);
+
+ if (adapter->netdev->flags & IFF_PROMISC) {
+ if (adapter->promisc_supported) {
+ crq.request_capability.capability =
+ cpu_to_be16(PROMISC_REQUESTED);
+ crq.request_capability.number = cpu_to_be64(1);
+ atomic_inc(&adapter->running_cap_crqs);
+ ibmvnic_send_crq(adapter, &crq);
+ }
+ } else {
+ crq.request_capability.capability =
+ cpu_to_be16(PROMISC_REQUESTED);
+ crq.request_capability.number = cpu_to_be64(0);
+ atomic_inc(&adapter->running_cap_crqs);
+ ibmvnic_send_crq(adapter, &crq);
+ }
+}
+
+static int pending_scrq(struct ibmvnic_adapter *adapter,
+ struct ibmvnic_sub_crq_queue *scrq)
+{
+ union sub_crq *entry = &scrq->msgs[scrq->cur];
+
+ if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
+ return 1;
+ else
+ return 0;
+}
+
+static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
+ struct ibmvnic_sub_crq_queue *scrq)
+{
+ union sub_crq *entry;
+ unsigned long flags;
+
+ spin_lock_irqsave(&scrq->lock, flags);
+ entry = &scrq->msgs[scrq->cur];
+ if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
+ if (++scrq->cur == scrq->size)
+ scrq->cur = 0;
+ } else {
+ entry = NULL;
+ }
+ spin_unlock_irqrestore(&scrq->lock, flags);
+
+ return entry;
+}
+
+static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
+{
+ struct ibmvnic_crq_queue *queue = &adapter->crq;
+ union ibmvnic_crq *crq;
+
+ crq = &queue->msgs[queue->cur];
+ if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
+ if (++queue->cur == queue->size)
+ queue->cur = 0;
+ } else {
+ crq = NULL;
+ }
+
+ return crq;
+}
+
+static void print_subcrq_error(struct device *dev, int rc, const char *func)
+{
+ switch (rc) {
+ case H_PARAMETER:
+ dev_warn_ratelimited(dev,
+ "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n",
+ func, rc);
+ break;
+ case H_CLOSED:
+ dev_warn_ratelimited(dev,
+ "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n",
+ func, rc);
+ break;
+ default:
+ dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc);
+ break;
+ }
+}
+
+static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
+ union sub_crq *sub_crq)
+{
+ unsigned int ua = adapter->vdev->unit_address;
+ struct device *dev = &adapter->vdev->dev;
+ u64 *u64_crq = (u64 *)sub_crq;
+ int rc;
+
+ netdev_dbg(adapter->netdev,
+ "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
+ (unsigned long int)cpu_to_be64(remote_handle),
+ (unsigned long int)cpu_to_be64(u64_crq[0]),
+ (unsigned long int)cpu_to_be64(u64_crq[1]),
+ (unsigned long int)cpu_to_be64(u64_crq[2]),
+ (unsigned long int)cpu_to_be64(u64_crq[3]));
+
+ /* Make sure the hypervisor sees the complete request */
+ mb();
+
+ rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
+ cpu_to_be64(remote_handle),
+ cpu_to_be64(u64_crq[0]),
+ cpu_to_be64(u64_crq[1]),
+ cpu_to_be64(u64_crq[2]),
+ cpu_to_be64(u64_crq[3]));
+
+ if (rc)
+ print_subcrq_error(dev, rc, __func__);
+
+ return rc;
+}
+
+static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
+ u64 remote_handle, u64 ioba, u64 num_entries)
+{
+ unsigned int ua = adapter->vdev->unit_address;
+ struct device *dev = &adapter->vdev->dev;
+ int rc;
+
+ /* Make sure the hypervisor sees the complete request */
+ mb();
+ rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
+ cpu_to_be64(remote_handle),
+ ioba, num_entries);
+
+ if (rc)
+ print_subcrq_error(dev, rc, __func__);
+
+ return rc;
+}
+
+static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
+ union ibmvnic_crq *crq)
+{
+ unsigned int ua = adapter->vdev->unit_address;
+ struct device *dev = &adapter->vdev->dev;
+ u64 *u64_crq = (u64 *)crq;
+ int rc;
+
+ netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
+ (unsigned long int)cpu_to_be64(u64_crq[0]),
+ (unsigned long int)cpu_to_be64(u64_crq[1]));
+
+ if (!adapter->crq.active &&
+ crq->generic.first != IBMVNIC_CRQ_INIT_CMD) {
+ dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n");
+ return -EINVAL;
+ }
+
+ /* Make sure the hypervisor sees the complete request */
+ mb();
+
+ rc = plpar_hcall_norets(H_SEND_CRQ, ua,
+ cpu_to_be64(u64_crq[0]),
+ cpu_to_be64(u64_crq[1]));
+
+ if (rc) {
+ if (rc == H_CLOSED) {
+ dev_warn(dev, "CRQ Queue closed\n");
+ if (adapter->resetting)
+ ibmvnic_reset(adapter, VNIC_RESET_FATAL);
+ }
+
+ dev_warn(dev, "Send error (rc=%d)\n", rc);
+ }
+
+ return rc;
+}
+
+static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
+{
+ union ibmvnic_crq crq;
+
+ memset(&crq, 0, sizeof(crq));
+ crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
+ crq.generic.cmd = IBMVNIC_CRQ_INIT;
+ netdev_dbg(adapter->netdev, "Sending CRQ init\n");
+
+ return ibmvnic_send_crq(adapter, &crq);
+}
+
+static int send_version_xchg(struct ibmvnic_adapter *adapter)
+{
+ union ibmvnic_crq crq;
+
+ memset(&crq, 0, sizeof(crq));
+ crq.version_exchange.first = IBMVNIC_CRQ_CMD;
+ crq.version_exchange.cmd = VERSION_EXCHANGE;
+ crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
+
+ return ibmvnic_send_crq(adapter, &crq);
+}
+
+struct vnic_login_client_data {
+ u8 type;
+ __be16 len;
+ char name[];
+} __packed;
+
+static int vnic_client_data_len(struct ibmvnic_adapter *adapter)
+{
+ int len;
+
+ /* Calculate the amount of buffer space needed for the
+ * vnic client data in the login buffer. There are four entries,
+ * OS name, LPAR name, device name, and a null last entry.
+ */
+ len = 4 * sizeof(struct vnic_login_client_data);
+ len += 6; /* "Linux" plus NULL */
+ len += strlen(utsname()->nodename) + 1;
+ len += strlen(adapter->netdev->name) + 1;
+
+ return len;
+}
+
+static void vnic_add_client_data(struct ibmvnic_adapter *adapter,
+ struct vnic_login_client_data *vlcd)
+{
+ const char *os_name = "Linux";
+ int len;
+
+ /* Type 1 - LPAR OS */
+ vlcd->type = 1;
+ len = strlen(os_name) + 1;
+ vlcd->len = cpu_to_be16(len);
+ strncpy(vlcd->name, os_name, len);
+ vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
+
+ /* Type 2 - LPAR name */
+ vlcd->type = 2;
+ len = strlen(utsname()->nodename) + 1;
+ vlcd->len = cpu_to_be16(len);
+ strncpy(vlcd->name, utsname()->nodename, len);
+ vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
+
+ /* Type 3 - device name */
+ vlcd->type = 3;
+ len = strlen(adapter->netdev->name) + 1;
+ vlcd->len = cpu_to_be16(len);
+ strncpy(vlcd->name, adapter->netdev->name, len);
+}
+
+static int send_login(struct ibmvnic_adapter *adapter)
+{
+ struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
+ struct ibmvnic_login_buffer *login_buffer;
+ struct device *dev = &adapter->vdev->dev;
+ dma_addr_t rsp_buffer_token;
+ dma_addr_t buffer_token;
+ size_t rsp_buffer_size;
+ union ibmvnic_crq crq;
+ size_t buffer_size;
+ __be64 *tx_list_p;
+ __be64 *rx_list_p;
+ int client_data_len;
+ struct vnic_login_client_data *vlcd;
+ int i;
+
+ if (!adapter->tx_scrq || !adapter->rx_scrq) {
+ netdev_err(adapter->netdev,
+ "RX or TX queues are not allocated, device login failed\n");
+ return -1;
+ }
+
+ release_login_rsp_buffer(adapter);
+ client_data_len = vnic_client_data_len(adapter);
+
+ buffer_size =
+ sizeof(struct ibmvnic_login_buffer) +
+ sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) +
+ client_data_len;
+
+ login_buffer = kzalloc(buffer_size, GFP_ATOMIC);
+ if (!login_buffer)
+ goto buf_alloc_failed;
+
+ buffer_token = dma_map_single(dev, login_buffer, buffer_size,
+ DMA_TO_DEVICE);
+ if (dma_mapping_error(dev, buffer_token)) {
+ dev_err(dev, "Couldn't map login buffer\n");
+ goto buf_map_failed;
+ }
+
+ rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
+ sizeof(u64) * adapter->req_tx_queues +
+ sizeof(u64) * adapter->req_rx_queues +
+ sizeof(u64) * adapter->req_rx_queues +
+ sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
+
+ login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
+ if (!login_rsp_buffer)
+ goto buf_rsp_alloc_failed;
+
+ rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
+ rsp_buffer_size, DMA_FROM_DEVICE);
+ if (dma_mapping_error(dev, rsp_buffer_token)) {
+ dev_err(dev, "Couldn't map login rsp buffer\n");
+ goto buf_rsp_map_failed;
+ }
+
+ adapter->login_buf = login_buffer;
+ adapter->login_buf_token = buffer_token;
+ adapter->login_buf_sz = buffer_size;
+ adapter->login_rsp_buf = login_rsp_buffer;
+ adapter->login_rsp_buf_token = rsp_buffer_token;
+ adapter->login_rsp_buf_sz = rsp_buffer_size;
+
+ login_buffer->len = cpu_to_be32(buffer_size);
+ login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
+ login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
+ login_buffer->off_txcomp_subcrqs =
+ cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
+ login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
+ login_buffer->off_rxcomp_subcrqs =
+ cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
+ sizeof(u64) * adapter->req_tx_queues);
+ login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
+ login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
+
+ tx_list_p = (__be64 *)((char *)login_buffer +
+ sizeof(struct ibmvnic_login_buffer));
+ rx_list_p = (__be64 *)((char *)login_buffer +
+ sizeof(struct ibmvnic_login_buffer) +
+ sizeof(u64) * adapter->req_tx_queues);
+
+ for (i = 0; i < adapter->req_tx_queues; i++) {
+ if (adapter->tx_scrq[i]) {
+ tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
+ crq_num);
+ }
+ }
+
+ for (i = 0; i < adapter->req_rx_queues; i++) {
+ if (adapter->rx_scrq[i]) {
+ rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
+ crq_num);
+ }
+ }
+
+ /* Insert vNIC login client data */
+ vlcd = (struct vnic_login_client_data *)
+ ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues));
+ login_buffer->client_data_offset =
+ cpu_to_be32((char *)vlcd - (char *)login_buffer);
+ login_buffer->client_data_len = cpu_to_be32(client_data_len);
+
+ vnic_add_client_data(adapter, vlcd);
+
+ netdev_dbg(adapter->netdev, "Login Buffer:\n");
+ for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
+ netdev_dbg(adapter->netdev, "%016lx\n",
+ ((unsigned long int *)(adapter->login_buf))[i]);
+ }
+
+ memset(&crq, 0, sizeof(crq));
+ crq.login.first = IBMVNIC_CRQ_CMD;
+ crq.login.cmd = LOGIN;
+ crq.login.ioba = cpu_to_be32(buffer_token);
+ crq.login.len = cpu_to_be32(buffer_size);
+ ibmvnic_send_crq(adapter, &crq);
+
+ return 0;
+
+buf_rsp_map_failed:
+ kfree(login_rsp_buffer);
+buf_rsp_alloc_failed:
+ dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
+buf_map_failed:
+ kfree(login_buffer);
+buf_alloc_failed:
+ return -1;
+}
+
+static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
+ u32 len, u8 map_id)
+{
+ union ibmvnic_crq crq;
+
+ memset(&crq, 0, sizeof(crq));
+ crq.request_map.first = IBMVNIC_CRQ_CMD;
+ crq.request_map.cmd = REQUEST_MAP;
+ crq.request_map.map_id = map_id;
+ crq.request_map.ioba = cpu_to_be32(addr);
+ crq.request_map.len = cpu_to_be32(len);
+ return ibmvnic_send_crq(adapter, &crq);
+}
+
+static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
+{
+ union ibmvnic_crq crq;
+
+ memset(&crq, 0, sizeof(crq));
+ crq.request_unmap.first = IBMVNIC_CRQ_CMD;
+ crq.request_unmap.cmd = REQUEST_UNMAP;
+ crq.request_unmap.map_id = map_id;
+ return ibmvnic_send_crq(adapter, &crq);
+}
+
+static void send_map_query(struct ibmvnic_adapter *adapter)
+{
+ union ibmvnic_crq crq;
+
+ memset(&crq, 0, sizeof(crq));
+ crq.query_map.first = IBMVNIC_CRQ_CMD;
+ crq.query_map.cmd = QUERY_MAP;
+ ibmvnic_send_crq(adapter, &crq);
+}
+
+/* Send a series of CRQs requesting various capabilities of the VNIC server */
+static void send_cap_queries(struct ibmvnic_adapter *adapter)
+{
+ union ibmvnic_crq crq;
+
+ atomic_set(&adapter->running_cap_crqs, 0);
+ memset(&crq, 0, sizeof(crq));
+ crq.query_capability.first = IBMVNIC_CRQ_CMD;
+ crq.query_capability.cmd = QUERY_CAPABILITY;
+
+ crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
+ atomic_inc(&adapter->running_cap_crqs);
+ ibmvnic_send_crq(adapter, &crq);
+
+ crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
+ atomic_inc(&adapter->running_cap_crqs);
+ ibmvnic_send_crq(adapter, &crq);
+
+ crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
+ atomic_inc(&adapter->running_cap_crqs);
+ ibmvnic_send_crq(adapter, &crq);
+
+ crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
+ atomic_inc(&adapter->running_cap_crqs);
+ ibmvnic_send_crq(adapter, &crq);
+
+ crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
+ atomic_inc(&adapter->running_cap_crqs);
+ ibmvnic_send_crq(adapter, &crq);
+
+ crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
+ atomic_inc(&adapter->running_cap_crqs);
+ ibmvnic_send_crq(adapter, &crq);
+
+ crq.query_capability.capability =
+ cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
+ atomic_inc(&adapter->running_cap_crqs);
+ ibmvnic_send_crq(adapter, &crq);
+
+ crq.query_capability.capability =
+ cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
+ atomic_inc(&adapter->running_cap_crqs);
+ ibmvnic_send_crq(adapter, &crq);
+
+ crq.query_capability.capability =
+ cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
+ atomic_inc(&adapter->running_cap_crqs);
+ ibmvnic_send_crq(adapter, &crq);
+
+ crq.query_capability.capability =
+ cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
+ atomic_inc(&adapter->running_cap_crqs);
+ ibmvnic_send_crq(adapter, &crq);
+
+ crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
+ atomic_inc(&adapter->running_cap_crqs);
+ ibmvnic_send_crq(adapter, &crq);
+
+ crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
+ atomic_inc(&adapter->running_cap_crqs);
+ ibmvnic_send_crq(adapter, &crq);
+
+ crq.query_capability.capability = cpu_to_be16(MIN_MTU);
+ atomic_inc(&adapter->running_cap_crqs);
+ ibmvnic_send_crq(adapter, &crq);
+
+ crq.query_capability.capability = cpu_to_be16(MAX_MTU);
+ atomic_inc(&adapter->running_cap_crqs);
+ ibmvnic_send_crq(adapter, &crq);
+
+ crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
+ atomic_inc(&adapter->running_cap_crqs);
+ ibmvnic_send_crq(adapter, &crq);
+
+ crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
+ atomic_inc(&adapter->running_cap_crqs);
+ ibmvnic_send_crq(adapter, &crq);
+
+ crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
+ atomic_inc(&adapter->running_cap_crqs);
+ ibmvnic_send_crq(adapter, &crq);
+
+ crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
+ atomic_inc(&adapter->running_cap_crqs);
+ ibmvnic_send_crq(adapter, &crq);
+
+ crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
+ atomic_inc(&adapter->running_cap_crqs);
+ ibmvnic_send_crq(adapter, &crq);
+
+ crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
+ atomic_inc(&adapter->running_cap_crqs);
+ ibmvnic_send_crq(adapter, &crq);
+
+ crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
+ atomic_inc(&adapter->running_cap_crqs);
+ ibmvnic_send_crq(adapter, &crq);
+
+ crq.query_capability.capability =
+ cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
+ atomic_inc(&adapter->running_cap_crqs);
+ ibmvnic_send_crq(adapter, &crq);
+
+ crq.query_capability.capability =
+ cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
+ atomic_inc(&adapter->running_cap_crqs);
+ ibmvnic_send_crq(adapter, &crq);
+
+ crq.query_capability.capability =
+ cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
+ atomic_inc(&adapter->running_cap_crqs);
+ ibmvnic_send_crq(adapter, &crq);
+
+ crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
+ atomic_inc(&adapter->running_cap_crqs);
+ ibmvnic_send_crq(adapter, &crq);
+}
+
+static void handle_vpd_size_rsp(union ibmvnic_crq *crq,
+ struct ibmvnic_adapter *adapter)
+{
+ struct device *dev = &adapter->vdev->dev;
+
+ if (crq->get_vpd_size_rsp.rc.code) {
+ dev_err(dev, "Error retrieving VPD size, rc=%x\n",
+ crq->get_vpd_size_rsp.rc.code);
+ complete(&adapter->fw_done);
+ return;
+ }
+
+ adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len);
+ complete(&adapter->fw_done);
+}
+
+static void handle_vpd_rsp(union ibmvnic_crq *crq,
+ struct ibmvnic_adapter *adapter)
+{
+ struct device *dev = &adapter->vdev->dev;
+ unsigned char *substr = NULL;
+ u8 fw_level_len = 0;
+
+ memset(adapter->fw_version, 0, 32);
+
+ dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len,
+ DMA_FROM_DEVICE);
+
+ if (crq->get_vpd_rsp.rc.code) {
+ dev_err(dev, "Error retrieving VPD from device, rc=%x\n",
+ crq->get_vpd_rsp.rc.code);
+ goto complete;
+ }
+
+ /* get the position of the firmware version info
+ * located after the ASCII 'RM' substring in the buffer
+ */
+ substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len);
+ if (!substr) {
+ dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n");
+ goto complete;
+ }
+
+ /* get length of firmware level ASCII substring */
+ if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) {
+ fw_level_len = *(substr + 2);
+ } else {
+ dev_info(dev, "Length of FW substr extrapolated VDP buff\n");
+ goto complete;
+ }
+
+ /* copy firmware version string from vpd into adapter */
+ if ((substr + 3 + fw_level_len) <
+ (adapter->vpd->buff + adapter->vpd->len)) {
+ strncpy((char *)adapter->fw_version, substr + 3, fw_level_len);
+ } else {
+ dev_info(dev, "FW substr extrapolated VPD buff\n");
+ }
+
+complete:
+ if (adapter->fw_version[0] == '\0')
+ strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char));
+ complete(&adapter->fw_done);
+}
+
+static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
+{
+ struct device *dev = &adapter->vdev->dev;
+ struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
+ union ibmvnic_crq crq;
+ int i;
+
+ dma_unmap_single(dev, adapter->ip_offload_tok,
+ sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
+
+ netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
+ for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
+ netdev_dbg(adapter->netdev, "%016lx\n",
+ ((unsigned long int *)(buf))[i]);
+
+ netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
+ netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
+ netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
+ buf->tcp_ipv4_chksum);
+ netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
+ buf->tcp_ipv6_chksum);
+ netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
+ buf->udp_ipv4_chksum);
+ netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
+ buf->udp_ipv6_chksum);
+ netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
+ buf->large_tx_ipv4);
+ netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
+ buf->large_tx_ipv6);
+ netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
+ buf->large_rx_ipv4);
+ netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
+ buf->large_rx_ipv6);
+ netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
+ buf->max_ipv4_header_size);
+ netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
+ buf->max_ipv6_header_size);
+ netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
+ buf->max_tcp_header_size);
+ netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
+ buf->max_udp_header_size);
+ netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
+ buf->max_large_tx_size);
+ netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
+ buf->max_large_rx_size);
+ netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
+ buf->ipv6_extension_header);
+ netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
+ buf->tcp_pseudosum_req);
+ netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
+ buf->num_ipv6_ext_headers);
+ netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
+ buf->off_ipv6_ext_headers);
+
+ adapter->ip_offload_ctrl_tok =
+ dma_map_single(dev, &adapter->ip_offload_ctrl,
+ sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE);
+
+ if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
+ dev_err(dev, "Couldn't map ip offload control buffer\n");
+ return;
+ }
+
+ adapter->ip_offload_ctrl.len =
+ cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
+ adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB);
+ adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum;
+ adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum;
+ adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
+ adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum;
+ adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
+ adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum;
+ adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4;
+ adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6;
+
+ /* large_rx disabled for now, additional features needed */
+ adapter->ip_offload_ctrl.large_rx_ipv4 = 0;
+ adapter->ip_offload_ctrl.large_rx_ipv6 = 0;
+
+ adapter->netdev->features = NETIF_F_SG | NETIF_F_GSO;
+
+ if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
+ adapter->netdev->features |= NETIF_F_IP_CSUM;
+
+ if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
+ adapter->netdev->features |= NETIF_F_IPV6_CSUM;
+
+ if ((adapter->netdev->features &
+ (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
+ adapter->netdev->features |= NETIF_F_RXCSUM;
+
+ if (buf->large_tx_ipv4)
+ adapter->netdev->features |= NETIF_F_TSO;
+ if (buf->large_tx_ipv6)
+ adapter->netdev->features |= NETIF_F_TSO6;
+
+ adapter->netdev->hw_features |= adapter->netdev->features;
+
+ memset(&crq, 0, sizeof(crq));
+ crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
+ crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
+ crq.control_ip_offload.len =
+ cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
+ crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
+ ibmvnic_send_crq(adapter, &crq);
+}
+
+static const char *ibmvnic_fw_err_cause(u16 cause)
+{
+ switch (cause) {
+ case ADAPTER_PROBLEM:
+ return "adapter problem";
+ case BUS_PROBLEM:
+ return "bus problem";
+ case FW_PROBLEM:
+ return "firmware problem";
+ case DD_PROBLEM:
+ return "device driver problem";
+ case EEH_RECOVERY:
+ return "EEH recovery";
+ case FW_UPDATED:
+ return "firmware updated";
+ case LOW_MEMORY:
+ return "low Memory";
+ default:
+ return "unknown";
+ }
+}
+
+static void handle_error_indication(union ibmvnic_crq *crq,
+ struct ibmvnic_adapter *adapter)
+{
+ struct device *dev = &adapter->vdev->dev;
+ u16 cause;
+
+ cause = be16_to_cpu(crq->error_indication.error_cause);
+
+ dev_warn_ratelimited(dev,
+ "Firmware reports %serror, cause: %s. Starting recovery...\n",
+ crq->error_indication.flags
+ & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
+ ibmvnic_fw_err_cause(cause));
+
+ if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
+ ibmvnic_reset(adapter, VNIC_RESET_FATAL);
+ else
+ ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
+}
+
+static int handle_change_mac_rsp(union ibmvnic_crq *crq,
+ struct ibmvnic_adapter *adapter)
+{
+ struct net_device *netdev = adapter->netdev;
+ struct device *dev = &adapter->vdev->dev;
+ long rc;
+
+ rc = crq->change_mac_addr_rsp.rc.code;
+ if (rc) {
+ dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
+ goto out;
+ }
+ memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0],
+ ETH_ALEN);
+out:
+ complete(&adapter->fw_done);
+ return rc;
+}
+
+static void handle_request_cap_rsp(union ibmvnic_crq *crq,
+ struct ibmvnic_adapter *adapter)
+{
+ struct device *dev = &adapter->vdev->dev;
+ u64 *req_value;
+ char *name;
+
+ atomic_dec(&adapter->running_cap_crqs);
+ switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
+ case REQ_TX_QUEUES:
+ req_value = &adapter->req_tx_queues;
+ name = "tx";
+ break;
+ case REQ_RX_QUEUES:
+ req_value = &adapter->req_rx_queues;
+ name = "rx";
+ break;
+ case REQ_RX_ADD_QUEUES:
+ req_value = &adapter->req_rx_add_queues;
+ name = "rx_add";
+ break;
+ case REQ_TX_ENTRIES_PER_SUBCRQ:
+ req_value = &adapter->req_tx_entries_per_subcrq;
+ name = "tx_entries_per_subcrq";
+ break;
+ case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
+ req_value = &adapter->req_rx_add_entries_per_subcrq;
+ name = "rx_add_entries_per_subcrq";
+ break;
+ case REQ_MTU:
+ req_value = &adapter->req_mtu;
+ name = "mtu";
+ break;
+ case PROMISC_REQUESTED:
+ req_value = &adapter->promisc;
+ name = "promisc";
+ break;
+ default:
+ dev_err(dev, "Got invalid cap request rsp %d\n",
+ crq->request_capability.capability);
+ return;
+ }
+
+ switch (crq->request_capability_rsp.rc.code) {
+ case SUCCESS:
+ break;
+ case PARTIALSUCCESS:
+ dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
+ *req_value,
+ (long int)be64_to_cpu(crq->request_capability_rsp.
+ number), name);
+
+ if (be16_to_cpu(crq->request_capability_rsp.capability) ==
+ REQ_MTU) {
+ pr_err("mtu of %llu is not supported. Reverting.\n",
+ *req_value);
+ *req_value = adapter->fallback.mtu;
+ } else {
+ *req_value =
+ be64_to_cpu(crq->request_capability_rsp.number);
+ }
+
+ ibmvnic_send_req_caps(adapter, 1);
+ return;
+ default:
+ dev_err(dev, "Error %d in request cap rsp\n",
+ crq->request_capability_rsp.rc.code);
+ return;
+ }
+
+ /* Done receiving requested capabilities, query IP offload support */
+ if (atomic_read(&adapter->running_cap_crqs) == 0) {
+ union ibmvnic_crq newcrq;
+ int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
+ struct ibmvnic_query_ip_offload_buffer *ip_offload_buf =
+ &adapter->ip_offload_buf;
+
+ adapter->wait_capability = false;
+ adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf,
+ buf_sz,
+ DMA_FROM_DEVICE);
+
+ if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
+ if (!firmware_has_feature(FW_FEATURE_CMO))
+ dev_err(dev, "Couldn't map offload buffer\n");
+ return;
+ }
+
+ memset(&newcrq, 0, sizeof(newcrq));
+ newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
+ newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
+ newcrq.query_ip_offload.len = cpu_to_be32(buf_sz);
+ newcrq.query_ip_offload.ioba =
+ cpu_to_be32(adapter->ip_offload_tok);
+
+ ibmvnic_send_crq(adapter, &newcrq);
+ }
+}
+
+static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
+ struct ibmvnic_adapter *adapter)
+{
+ struct device *dev = &adapter->vdev->dev;
+ struct net_device *netdev = adapter->netdev;
+ struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
+ struct ibmvnic_login_buffer *login = adapter->login_buf;
+ int i;
+
+ dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
+ DMA_TO_DEVICE);
+ dma_unmap_single(dev, adapter->login_rsp_buf_token,
+ adapter->login_rsp_buf_sz, DMA_FROM_DEVICE);
+
+ /* If the number of queues requested can't be allocated by the
+ * server, the login response will return with code 1. We will need
+ * to resend the login buffer with fewer queues requested.
+ */
+ if (login_rsp_crq->generic.rc.code) {
+ adapter->init_done_rc = login_rsp_crq->generic.rc.code;
+ complete(&adapter->init_done);
+ return 0;
+ }
+
+ netdev->mtu = adapter->req_mtu - ETH_HLEN;
+
+ netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
+ for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
+ netdev_dbg(adapter->netdev, "%016lx\n",
+ ((unsigned long int *)(adapter->login_rsp_buf))[i]);
+ }
+
+ /* Sanity checks */
+ if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
+ (be32_to_cpu(login->num_rxcomp_subcrqs) *
+ adapter->req_rx_add_queues !=
+ be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
+ dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
+ ibmvnic_remove(adapter->vdev);
+ return -EIO;
+ }
+ release_login_buffer(adapter);
+ complete(&adapter->init_done);
+
+ return 0;
+}
+
+static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
+ struct ibmvnic_adapter *adapter)
+{
+ struct device *dev = &adapter->vdev->dev;
+ long rc;
+
+ rc = crq->request_unmap_rsp.rc.code;
+ if (rc)
+ dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
+}
+
+static void handle_query_map_rsp(union ibmvnic_crq *crq,
+ struct ibmvnic_adapter *adapter)
+{
+ struct net_device *netdev = adapter->netdev;
+ struct device *dev = &adapter->vdev->dev;
+ long rc;
+
+ rc = crq->query_map_rsp.rc.code;
+ if (rc) {
+ dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
+ return;
+ }
+ netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
+ crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
+ crq->query_map_rsp.free_pages);
+}
+
+static void handle_query_cap_rsp(union ibmvnic_crq *crq,
+ struct ibmvnic_adapter *adapter)
+{
+ struct net_device *netdev = adapter->netdev;
+ struct device *dev = &adapter->vdev->dev;
+ long rc;
+
+ atomic_dec(&adapter->running_cap_crqs);
+ netdev_dbg(netdev, "Outstanding queries: %d\n",
+ atomic_read(&adapter->running_cap_crqs));
+ rc = crq->query_capability.rc.code;
+ if (rc) {
+ dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
+ goto out;
+ }
+
+ switch (be16_to_cpu(crq->query_capability.capability)) {
+ case MIN_TX_QUEUES:
+ adapter->min_tx_queues =
+ be64_to_cpu(crq->query_capability.number);
+ netdev_dbg(netdev, "min_tx_queues = %lld\n",
+ adapter->min_tx_queues);
+ break;
+ case MIN_RX_QUEUES:
+ adapter->min_rx_queues =
+ be64_to_cpu(crq->query_capability.number);
+ netdev_dbg(netdev, "min_rx_queues = %lld\n",
+ adapter->min_rx_queues);
+ break;
+ case MIN_RX_ADD_QUEUES:
+ adapter->min_rx_add_queues =
+ be64_to_cpu(crq->query_capability.number);
+ netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
+ adapter->min_rx_add_queues);
+ break;
+ case MAX_TX_QUEUES:
+ adapter->max_tx_queues =
+ be64_to_cpu(crq->query_capability.number);
+ netdev_dbg(netdev, "max_tx_queues = %lld\n",
+ adapter->max_tx_queues);
+ break;
+ case MAX_RX_QUEUES:
+ adapter->max_rx_queues =
+ be64_to_cpu(crq->query_capability.number);
+ netdev_dbg(netdev, "max_rx_queues = %lld\n",
+ adapter->max_rx_queues);
+ break;
+ case MAX_RX_ADD_QUEUES:
+ adapter->max_rx_add_queues =
+ be64_to_cpu(crq->query_capability.number);
+ netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
+ adapter->max_rx_add_queues);
+ break;
+ case MIN_TX_ENTRIES_PER_SUBCRQ:
+ adapter->min_tx_entries_per_subcrq =
+ be64_to_cpu(crq->query_capability.number);
+ netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
+ adapter->min_tx_entries_per_subcrq);
+ break;
+ case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
+ adapter->min_rx_add_entries_per_subcrq =
+ be64_to_cpu(crq->query_capability.number);
+ netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
+ adapter->min_rx_add_entries_per_subcrq);
+ break;
+ case MAX_TX_ENTRIES_PER_SUBCRQ:
+ adapter->max_tx_entries_per_subcrq =
+ be64_to_cpu(crq->query_capability.number);
+ netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
+ adapter->max_tx_entries_per_subcrq);
+ break;
+ case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
+ adapter->max_rx_add_entries_per_subcrq =
+ be64_to_cpu(crq->query_capability.number);
+ netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
+ adapter->max_rx_add_entries_per_subcrq);
+ break;
+ case TCP_IP_OFFLOAD:
+ adapter->tcp_ip_offload =
+ be64_to_cpu(crq->query_capability.number);
+ netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
+ adapter->tcp_ip_offload);
+ break;
+ case PROMISC_SUPPORTED:
+ adapter->promisc_supported =
+ be64_to_cpu(crq->query_capability.number);
+ netdev_dbg(netdev, "promisc_supported = %lld\n",
+ adapter->promisc_supported);
+ break;
+ case MIN_MTU:
+ adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
+ netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
+ netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
+ break;
+ case MAX_MTU:
+ adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
+ netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
+ netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
+ break;
+ case MAX_MULTICAST_FILTERS:
+ adapter->max_multicast_filters =
+ be64_to_cpu(crq->query_capability.number);
+ netdev_dbg(netdev, "max_multicast_filters = %lld\n",
+ adapter->max_multicast_filters);
+ break;
+ case VLAN_HEADER_INSERTION:
+ adapter->vlan_header_insertion =
+ be64_to_cpu(crq->query_capability.number);
+ if (adapter->vlan_header_insertion)
+ netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
+ netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
+ adapter->vlan_header_insertion);
+ break;
+ case RX_VLAN_HEADER_INSERTION:
+ adapter->rx_vlan_header_insertion =
+ be64_to_cpu(crq->query_capability.number);
+ netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
+ adapter->rx_vlan_header_insertion);
+ break;
+ case MAX_TX_SG_ENTRIES:
+ adapter->max_tx_sg_entries =
+ be64_to_cpu(crq->query_capability.number);
+ netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
+ adapter->max_tx_sg_entries);
+ break;
+ case RX_SG_SUPPORTED:
+ adapter->rx_sg_supported =
+ be64_to_cpu(crq->query_capability.number);
+ netdev_dbg(netdev, "rx_sg_supported = %lld\n",
+ adapter->rx_sg_supported);
+ break;
+ case OPT_TX_COMP_SUB_QUEUES:
+ adapter->opt_tx_comp_sub_queues =
+ be64_to_cpu(crq->query_capability.number);
+ netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
+ adapter->opt_tx_comp_sub_queues);
+ break;
+ case OPT_RX_COMP_QUEUES:
+ adapter->opt_rx_comp_queues =
+ be64_to_cpu(crq->query_capability.number);
+ netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
+ adapter->opt_rx_comp_queues);
+ break;
+ case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
+ adapter->opt_rx_bufadd_q_per_rx_comp_q =
+ be64_to_cpu(crq->query_capability.number);
+ netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
+ adapter->opt_rx_bufadd_q_per_rx_comp_q);
+ break;
+ case OPT_TX_ENTRIES_PER_SUBCRQ:
+ adapter->opt_tx_entries_per_subcrq =
+ be64_to_cpu(crq->query_capability.number);
+ netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
+ adapter->opt_tx_entries_per_subcrq);
+ break;
+ case OPT_RXBA_ENTRIES_PER_SUBCRQ:
+ adapter->opt_rxba_entries_per_subcrq =
+ be64_to_cpu(crq->query_capability.number);
+ netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
+ adapter->opt_rxba_entries_per_subcrq);
+ break;
+ case TX_RX_DESC_REQ:
+ adapter->tx_rx_desc_req = crq->query_capability.number;
+ netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
+ adapter->tx_rx_desc_req);
+ break;
+
+ default:
+ netdev_err(netdev, "Got invalid cap rsp %d\n",
+ crq->query_capability.capability);
+ }
+
+out:
+ if (atomic_read(&adapter->running_cap_crqs) == 0) {
+ adapter->wait_capability = false;
+ ibmvnic_send_req_caps(adapter, 0);
+ }
+}
+
+static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
+ struct ibmvnic_adapter *adapter)
+{
+ struct ibmvnic_generic_crq *gen_crq = &crq->generic;
+ struct net_device *netdev = adapter->netdev;
+ struct device *dev = &adapter->vdev->dev;
+ u64 *u64_crq = (u64 *)crq;
+ long rc;
+
+ netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
+ (unsigned long int)cpu_to_be64(u64_crq[0]),
+ (unsigned long int)cpu_to_be64(u64_crq[1]));
+ switch (gen_crq->first) {
+ case IBMVNIC_CRQ_INIT_RSP:
+ switch (gen_crq->cmd) {
+ case IBMVNIC_CRQ_INIT:
+ dev_info(dev, "Partner initialized\n");
+ adapter->from_passive_init = true;
+ adapter->failover_pending = false;
+ if (!completion_done(&adapter->init_done)) {
+ complete(&adapter->init_done);
+ adapter->init_done_rc = -EIO;
+ }
+ ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
+ break;
+ case IBMVNIC_CRQ_INIT_COMPLETE:
+ dev_info(dev, "Partner initialization complete\n");
+ adapter->crq.active = true;
+ send_version_xchg(adapter);
+ break;
+ default:
+ dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
+ }
+ return;
+ case IBMVNIC_CRQ_XPORT_EVENT:
+ netif_carrier_off(netdev);
+ adapter->crq.active = false;
+ if (adapter->resetting)
+ adapter->force_reset_recovery = true;
+ if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
+ dev_info(dev, "Migrated, re-enabling adapter\n");
+ ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
+ } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
+ dev_info(dev, "Backing device failover detected\n");
+ adapter->failover_pending = true;
+ } else {
+ /* The adapter lost the connection */
+ dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
+ gen_crq->cmd);
+ ibmvnic_reset(adapter, VNIC_RESET_FATAL);
+ }
+ return;
+ case IBMVNIC_CRQ_CMD_RSP:
+ break;
+ default:
+ dev_err(dev, "Got an invalid msg type 0x%02x\n",
+ gen_crq->first);
+ return;
+ }
+
+ switch (gen_crq->cmd) {
+ case VERSION_EXCHANGE_RSP:
+ rc = crq->version_exchange_rsp.rc.code;
+ if (rc) {
+ dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
+ break;
+ }
+ dev_info(dev, "Partner protocol version is %d\n",
+ crq->version_exchange_rsp.version);
+ if (be16_to_cpu(crq->version_exchange_rsp.version) <
+ ibmvnic_version)
+ ibmvnic_version =
+ be16_to_cpu(crq->version_exchange_rsp.version);
+ send_cap_queries(adapter);
+ break;
+ case QUERY_CAPABILITY_RSP:
+ handle_query_cap_rsp(crq, adapter);
+ break;
+ case QUERY_MAP_RSP:
+ handle_query_map_rsp(crq, adapter);
+ break;
+ case REQUEST_MAP_RSP:
+ adapter->fw_done_rc = crq->request_map_rsp.rc.code;
+ complete(&adapter->fw_done);
+ break;
+ case REQUEST_UNMAP_RSP:
+ handle_request_unmap_rsp(crq, adapter);
+ break;
+ case REQUEST_CAPABILITY_RSP:
+ handle_request_cap_rsp(crq, adapter);
+ break;
+ case LOGIN_RSP:
+ netdev_dbg(netdev, "Got Login Response\n");
+ handle_login_rsp(crq, adapter);
+ break;
+ case LOGICAL_LINK_STATE_RSP:
+ netdev_dbg(netdev,
+ "Got Logical Link State Response, state: %d rc: %d\n",
+ crq->logical_link_state_rsp.link_state,
+ crq->logical_link_state_rsp.rc.code);
+ adapter->logical_link_state =
+ crq->logical_link_state_rsp.link_state;
+ adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
+ complete(&adapter->init_done);
+ break;
+ case LINK_STATE_INDICATION:
+ netdev_dbg(netdev, "Got Logical Link State Indication\n");
+ adapter->phys_link_state =
+ crq->link_state_indication.phys_link_state;
+ adapter->logical_link_state =
+ crq->link_state_indication.logical_link_state;
+ break;
+ case CHANGE_MAC_ADDR_RSP:
+ netdev_dbg(netdev, "Got MAC address change Response\n");
+ adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter);
+ break;
+ case ERROR_INDICATION:
+ netdev_dbg(netdev, "Got Error Indication\n");
+ handle_error_indication(crq, adapter);
+ break;
+ case REQUEST_STATISTICS_RSP:
+ netdev_dbg(netdev, "Got Statistics Response\n");
+ complete(&adapter->stats_done);
+ break;
+ case QUERY_IP_OFFLOAD_RSP:
+ netdev_dbg(netdev, "Got Query IP offload Response\n");
+ handle_query_ip_offload_rsp(adapter);
+ break;
+ case MULTICAST_CTRL_RSP:
+ netdev_dbg(netdev, "Got multicast control Response\n");
+ break;
+ case CONTROL_IP_OFFLOAD_RSP:
+ netdev_dbg(netdev, "Got Control IP offload Response\n");
+ dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
+ sizeof(adapter->ip_offload_ctrl),
+ DMA_TO_DEVICE);
+ complete(&adapter->init_done);
+ break;
+ case COLLECT_FW_TRACE_RSP:
+ netdev_dbg(netdev, "Got Collect firmware trace Response\n");
+ complete(&adapter->fw_done);
+ break;
+ case GET_VPD_SIZE_RSP:
+ handle_vpd_size_rsp(crq, adapter);
+ break;
+ case GET_VPD_RSP:
+ handle_vpd_rsp(crq, adapter);
+ break;
+ default:
+ netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
+ gen_crq->cmd);
+ }
+}
+
+static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
+{
+ struct ibmvnic_adapter *adapter = instance;
+
+ tasklet_schedule(&adapter->tasklet);
+ return IRQ_HANDLED;
+}
+
+static void ibmvnic_tasklet(void *data)
+{
+ struct ibmvnic_adapter *adapter = data;
+ struct ibmvnic_crq_queue *queue = &adapter->crq;
+ union ibmvnic_crq *crq;
+ unsigned long flags;
+ bool done = false;
+
+ spin_lock_irqsave(&queue->lock, flags);
+ while (!done) {
+ /* Pull all the valid messages off the CRQ */
+ while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
+ ibmvnic_handle_crq(crq, adapter);
+ crq->generic.first = 0;
+ }
+
+ /* remain in tasklet until all
+ * capabilities responses are received
+ */
+ if (!adapter->wait_capability)
+ done = true;
+ }
+ /* if capabilities CRQ's were sent in this tasklet, the following
+ * tasklet must wait until all responses are received
+ */
+ if (atomic_read(&adapter->running_cap_crqs) != 0)
+ adapter->wait_capability = true;
+ spin_unlock_irqrestore(&queue->lock, flags);
+}
+
+static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
+{
+ struct vio_dev *vdev = adapter->vdev;
+ int rc;
+
+ do {
+ rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
+ } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
+
+ if (rc)
+ dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
+
+ return rc;
+}
+
+static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
+{
+ struct ibmvnic_crq_queue *crq = &adapter->crq;
+ struct device *dev = &adapter->vdev->dev;
+ struct vio_dev *vdev = adapter->vdev;
+ int rc;
+
+ /* Close the CRQ */
+ do {
+ rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
+ } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
+
+ /* Clean out the queue */
+ memset(crq->msgs, 0, PAGE_SIZE);
+ crq->cur = 0;
+ crq->active = false;
+
+ /* And re-open it again */
+ rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
+ crq->msg_token, PAGE_SIZE);
+
+ if (rc == H_CLOSED)
+ /* Adapter is good, but other end is not ready */
+ dev_warn(dev, "Partner adapter not ready\n");
+ else if (rc != 0)
+ dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
+
+ return rc;
+}
+
+static void release_crq_queue(struct ibmvnic_adapter *adapter)
+{
+ struct ibmvnic_crq_queue *crq = &adapter->crq;
+ struct vio_dev *vdev = adapter->vdev;
+ long rc;
+
+ if (!crq->msgs)
+ return;
+
+ netdev_dbg(adapter->netdev, "Releasing CRQ\n");
+ free_irq(vdev->irq, adapter);
+ tasklet_kill(&adapter->tasklet);
+ do {
+ rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
+ } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
+
+ dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
+ DMA_BIDIRECTIONAL);
+ free_page((unsigned long)crq->msgs);
+ crq->msgs = NULL;
+ crq->active = false;
+}
+
+static int init_crq_queue(struct ibmvnic_adapter *adapter)
+{
+ struct ibmvnic_crq_queue *crq = &adapter->crq;
+ struct device *dev = &adapter->vdev->dev;
+ struct vio_dev *vdev = adapter->vdev;
+ int rc, retrc = -ENOMEM;
+
+ if (crq->msgs)
+ return 0;
+
+ crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
+ /* Should we allocate more than one page? */
+
+ if (!crq->msgs)
+ return -ENOMEM;
+
+ crq->size = PAGE_SIZE / sizeof(*crq->msgs);
+ crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
+ DMA_BIDIRECTIONAL);
+ if (dma_mapping_error(dev, crq->msg_token))
+ goto map_failed;
+
+ rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
+ crq->msg_token, PAGE_SIZE);
+
+ if (rc == H_RESOURCE)
+ /* maybe kexecing and resource is busy. try a reset */
+ rc = ibmvnic_reset_crq(adapter);
+ retrc = rc;
+
+ if (rc == H_CLOSED) {
+ dev_warn(dev, "Partner adapter not ready\n");
+ } else if (rc) {
+ dev_warn(dev, "Error %d opening adapter\n", rc);
+ goto reg_crq_failed;
+ }
+
+ retrc = 0;
+
+ tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet,
+ (unsigned long)adapter);
+
+ netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
+ rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME,
+ adapter);
+ if (rc) {
+ dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
+ vdev->irq, rc);
+ goto req_irq_failed;
+ }
+
+ rc = vio_enable_interrupts(vdev);
+ if (rc) {
+ dev_err(dev, "Error %d enabling interrupts\n", rc);
+ goto req_irq_failed;
+ }
+
+ crq->cur = 0;
+ spin_lock_init(&crq->lock);
+
+ return retrc;
+
+req_irq_failed:
+ tasklet_kill(&adapter->tasklet);
+ do {
+ rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
+ } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
+reg_crq_failed:
+ dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
+map_failed:
+ free_page((unsigned long)crq->msgs);
+ crq->msgs = NULL;
+ return retrc;
+}
+
+static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter)
+{
+ struct device *dev = &adapter->vdev->dev;
+ unsigned long timeout = msecs_to_jiffies(30000);
+ u64 old_num_rx_queues, old_num_tx_queues;
+ int rc;
+
+ adapter->from_passive_init = false;
+
+ old_num_rx_queues = adapter->req_rx_queues;
+ old_num_tx_queues = adapter->req_tx_queues;
+
+ init_completion(&adapter->init_done);
+ adapter->init_done_rc = 0;
+ ibmvnic_send_crq_init(adapter);
+ if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
+ dev_err(dev, "Initialization sequence timed out\n");
+ return -1;
+ }
+
+ if (adapter->init_done_rc) {
+ release_crq_queue(adapter);
+ return adapter->init_done_rc;
+ }
+
+ if (adapter->from_passive_init) {
+ adapter->state = VNIC_OPEN;
+ adapter->from_passive_init = false;
+ return -1;
+ }
+
+ if (adapter->resetting && !adapter->wait_for_reset &&
+ adapter->reset_reason != VNIC_RESET_MOBILITY) {
+ if (adapter->req_rx_queues != old_num_rx_queues ||
+ adapter->req_tx_queues != old_num_tx_queues) {
+ release_sub_crqs(adapter, 0);
+ rc = init_sub_crqs(adapter);
+ } else {
+ rc = reset_sub_crq_queues(adapter);
+ }
+ } else {
+ rc = init_sub_crqs(adapter);
+ }
+
+ if (rc) {
+ dev_err(dev, "Initialization of sub crqs failed\n");
+ release_crq_queue(adapter);
+ return rc;
+ }
+
+ rc = init_sub_crq_irqs(adapter);
+ if (rc) {
+ dev_err(dev, "Failed to initialize sub crq irqs\n");
+ release_crq_queue(adapter);
+ }
+
+ return rc;
+}
+
+static int ibmvnic_init(struct ibmvnic_adapter *adapter)
+{
+ struct device *dev = &adapter->vdev->dev;
+ unsigned long timeout = msecs_to_jiffies(30000);
+ int rc;
+
+ adapter->from_passive_init = false;
+
+ init_completion(&adapter->init_done);
+ adapter->init_done_rc = 0;
+ ibmvnic_send_crq_init(adapter);
+ if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
+ dev_err(dev, "Initialization sequence timed out\n");
+ return -1;
+ }
+
+ if (adapter->init_done_rc) {
+ release_crq_queue(adapter);
+ return adapter->init_done_rc;
+ }
+
+ if (adapter->from_passive_init) {
+ adapter->state = VNIC_OPEN;
+ adapter->from_passive_init = false;
+ return -1;
+ }
+
+ rc = init_sub_crqs(adapter);
+ if (rc) {
+ dev_err(dev, "Initialization of sub crqs failed\n");
+ release_crq_queue(adapter);
+ return rc;
+ }
+
+ rc = init_sub_crq_irqs(adapter);
+ if (rc) {
+ dev_err(dev, "Failed to initialize sub crq irqs\n");
+ release_crq_queue(adapter);
+ }
+
+ return rc;
+}
+
+static struct device_attribute dev_attr_failover;
+
+static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
+{
+ struct ibmvnic_adapter *adapter;
+ struct net_device *netdev;
+ unsigned char *mac_addr_p;
+ int rc;
+
+ dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
+ dev->unit_address);
+
+ mac_addr_p = (unsigned char *)vio_get_attribute(dev,
+ VETH_MAC_ADDR, NULL);
+ if (!mac_addr_p) {
+ dev_err(&dev->dev,
+ "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
+ __FILE__, __LINE__);
+ return 0;
+ }
+
+ netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
+ IBMVNIC_MAX_QUEUES);
+ if (!netdev)
+ return -ENOMEM;
+
+ adapter = netdev_priv(netdev);
+ adapter->state = VNIC_PROBING;
+ dev_set_drvdata(&dev->dev, netdev);
+ adapter->vdev = dev;
+ adapter->netdev = netdev;
+
+ ether_addr_copy(adapter->mac_addr, mac_addr_p);
+ ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
+ netdev->irq = dev->irq;
+ netdev->netdev_ops = &ibmvnic_netdev_ops;
+ netdev->ethtool_ops = &ibmvnic_ethtool_ops;
+ SET_NETDEV_DEV(netdev, &dev->dev);
+
+ spin_lock_init(&adapter->stats_lock);
+
+ INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
+ INIT_LIST_HEAD(&adapter->rwi_list);
+ mutex_init(&adapter->rwi_lock);
+ adapter->resetting = false;
+
+ adapter->mac_change_pending = false;
+
+ do {
+ rc = init_crq_queue(adapter);
+ if (rc) {
+ dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n",
+ rc);
+ goto ibmvnic_init_fail;
+ }
+
+ rc = ibmvnic_init(adapter);
+ if (rc && rc != EAGAIN)
+ goto ibmvnic_init_fail;
+ } while (rc == EAGAIN);
+
+ rc = init_stats_buffers(adapter);
+ if (rc)
+ goto ibmvnic_init_fail;
+
+ rc = init_stats_token(adapter);
+ if (rc)
+ goto ibmvnic_stats_fail;
+
+ netdev->mtu = adapter->req_mtu - ETH_HLEN;
+ netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
+ netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
+
+ rc = device_create_file(&dev->dev, &dev_attr_failover);
+ if (rc)
+ goto ibmvnic_dev_file_err;
+
+ netif_carrier_off(netdev);
+ rc = register_netdev(netdev);
+ if (rc) {
+ dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
+ goto ibmvnic_register_fail;
+ }
+ dev_info(&dev->dev, "ibmvnic registered\n");
+
+ adapter->state = VNIC_PROBED;
+
+ adapter->wait_for_reset = false;
+
+ return 0;
+
+ibmvnic_register_fail:
+ device_remove_file(&dev->dev, &dev_attr_failover);
+
+ibmvnic_dev_file_err:
+ release_stats_token(adapter);
+
+ibmvnic_stats_fail:
+ release_stats_buffers(adapter);
+
+ibmvnic_init_fail:
+ release_sub_crqs(adapter, 1);
+ release_crq_queue(adapter);
+ free_netdev(netdev);
+
+ return rc;
+}
+
+static int ibmvnic_remove(struct vio_dev *dev)
+{
+ struct net_device *netdev = dev_get_drvdata(&dev->dev);
+ struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+
+ adapter->state = VNIC_REMOVING;
+ rtnl_lock();
+ unregister_netdevice(netdev);
+
+ release_resources(adapter);
+ release_sub_crqs(adapter, 1);
+ release_crq_queue(adapter);
+
+ release_stats_token(adapter);
+ release_stats_buffers(adapter);
+
+ adapter->state = VNIC_REMOVED;
+
+ rtnl_unlock();
+ device_remove_file(&dev->dev, &dev_attr_failover);
+ free_netdev(netdev);
+ dev_set_drvdata(&dev->dev, NULL);
+
+ return 0;
+}
+
+static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct net_device *netdev = dev_get_drvdata(dev);
+ struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+ unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
+ __be64 session_token;
+ long rc;
+
+ if (!sysfs_streq(buf, "1"))
+ return -EINVAL;
+
+ rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
+ H_GET_SESSION_TOKEN, 0, 0, 0);
+ if (rc) {
+ netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
+ rc);
+ return -EINVAL;
+ }
+
+ session_token = (__be64)retbuf[0];
+ netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
+ be64_to_cpu(session_token));
+ rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
+ H_SESSION_ERR_DETECTED, session_token, 0, 0);
+ if (rc) {
+ netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
+ rc);
+ return -EINVAL;
+ }
+
+ return count;
+}
+
+static DEVICE_ATTR_WO(failover);
+
+static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
+{
+ struct net_device *netdev = dev_get_drvdata(&vdev->dev);
+ struct ibmvnic_adapter *adapter;
+ struct iommu_table *tbl;
+ unsigned long ret = 0;
+ int i;
+
+ tbl = get_iommu_table_base(&vdev->dev);
+
+ /* netdev inits at probe time along with the structures we need below*/
+ if (!netdev)
+ return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
+
+ adapter = netdev_priv(netdev);
+
+ ret += PAGE_SIZE; /* the crq message queue */
+ ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
+
+ for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
+ ret += 4 * PAGE_SIZE; /* the scrq message queue */
+
+ for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
+ i++)
+ ret += adapter->rx_pool[i].size *
+ IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
+
+ return ret;
+}
+
+static int ibmvnic_resume(struct device *dev)
+{
+ struct net_device *netdev = dev_get_drvdata(dev);
+ struct ibmvnic_adapter *adapter = netdev_priv(netdev);
+
+ if (adapter->state != VNIC_OPEN)
+ return 0;
+
+ tasklet_schedule(&adapter->tasklet);
+
+ return 0;
+}
+
+static const struct vio_device_id ibmvnic_device_table[] = {
+ {"network", "IBM,vnic"},
+ {"", "" }
+};
+MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
+
+static const struct dev_pm_ops ibmvnic_pm_ops = {
+ .resume = ibmvnic_resume
+};
+
+static struct vio_driver ibmvnic_driver = {
+ .id_table = ibmvnic_device_table,
+ .probe = ibmvnic_probe,
+ .remove = ibmvnic_remove,
+ .get_desired_dma = ibmvnic_get_desired_dma,
+ .name = ibmvnic_driver_name,
+ .pm = &ibmvnic_pm_ops,
+};
+
+/* module functions */
+static int __init ibmvnic_module_init(void)
+{
+ pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
+ IBMVNIC_DRIVER_VERSION);
+
+ return vio_register_driver(&ibmvnic_driver);
+}
+
+static void __exit ibmvnic_module_exit(void)
+{
+ vio_unregister_driver(&ibmvnic_driver);
+}
+
+module_init(ibmvnic_module_init);
+module_exit(ibmvnic_module_exit);