*/
#include "t4_pci_id_tbl.h"
+static uint16_t cxgbe_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
+ uint16_t nb_pkts)
+{
+ struct sge_eth_rxq *rxq = (struct sge_eth_rxq *)rx_queue;
+ unsigned int work_done;
+
+ CXGBE_DEBUG_RX(adapter, "%s: rxq->rspq.cntxt_id = %u; nb_pkts = %d\n",
+ __func__, rxq->rspq.cntxt_id, nb_pkts);
+
+ if (cxgbe_poll(&rxq->rspq, rx_pkts, (unsigned int)nb_pkts, &work_done))
+ dev_err(adapter, "error in cxgbe poll\n");
+
+ CXGBE_DEBUG_RX(adapter, "%s: work_done = %u\n", __func__, work_done);
+ return work_done;
+}
+
+static void cxgbe_dev_info_get(struct rte_eth_dev *eth_dev,
+ struct rte_eth_dev_info *device_info)
+{
+ struct port_info *pi = (struct port_info *)(eth_dev->data->dev_private);
+ struct adapter *adapter = pi->adapter;
+ int max_queues = adapter->sge.max_ethqsets / adapter->params.nports;
+
+ device_info->min_rx_bufsize = 68; /* XXX: Smallest pkt size */
+ device_info->max_rx_pktlen = 1500; /* XXX: For now we support mtu */
+ device_info->max_rx_queues = max_queues;
+ device_info->max_tx_queues = max_queues;
+ device_info->max_mac_addrs = 1;
+ /* XXX: For now we support one MAC/port */
+ device_info->max_vfs = adapter->params.arch.vfcount;
+ device_info->max_vmdq_pools = 0; /* XXX: For now no support for VMDQ */
+
+ device_info->rx_offload_capa = DEV_RX_OFFLOAD_VLAN_STRIP |
+ DEV_RX_OFFLOAD_IPV4_CKSUM |
+ DEV_RX_OFFLOAD_UDP_CKSUM |
+ DEV_RX_OFFLOAD_TCP_CKSUM;
+
+ device_info->tx_offload_capa = DEV_TX_OFFLOAD_VLAN_INSERT |
+ DEV_TX_OFFLOAD_IPV4_CKSUM |
+ DEV_TX_OFFLOAD_UDP_CKSUM |
+ DEV_TX_OFFLOAD_TCP_CKSUM |
+ DEV_TX_OFFLOAD_TCP_TSO;
+
+ device_info->reta_size = pi->rss_size;
+}
+
+static int cxgbe_dev_rx_queue_start(struct rte_eth_dev *eth_dev,
+ uint16_t tx_queue_id);
+static void cxgbe_dev_rx_queue_release(void *q);
+
+static int cxgbe_dev_configure(struct rte_eth_dev *eth_dev)
+{
+ struct port_info *pi = (struct port_info *)(eth_dev->data->dev_private);
+ struct adapter *adapter = pi->adapter;
+ int err;
+
+ CXGBE_FUNC_TRACE();
+
+ if (!(adapter->flags & FW_QUEUE_BOUND)) {
+ err = setup_sge_fwevtq(adapter);
+ if (err)
+ return err;
+ adapter->flags |= FW_QUEUE_BOUND;
+ }
+
+ err = cfg_queue_count(eth_dev);
+ if (err)
+ return err;
+
+ return 0;
+}
+
+static int cxgbe_dev_rx_queue_start(struct rte_eth_dev *eth_dev,
+ uint16_t rx_queue_id)
+{
+ struct port_info *pi = (struct port_info *)(eth_dev->data->dev_private);
+ struct adapter *adap = pi->adapter;
+ struct sge_rspq *q;
+
+ dev_debug(adapter, "%s: pi->port_id = %d; rx_queue_id = %d\n",
+ __func__, pi->port_id, rx_queue_id);
+
+ q = eth_dev->data->rx_queues[rx_queue_id];
+ return t4_sge_eth_rxq_start(adap, q);
+}
+
+static int cxgbe_dev_rx_queue_stop(struct rte_eth_dev *eth_dev,
+ uint16_t rx_queue_id)
+{
+ struct port_info *pi = (struct port_info *)(eth_dev->data->dev_private);
+ struct adapter *adap = pi->adapter;
+ struct sge_rspq *q;
+
+ dev_debug(adapter, "%s: pi->port_id = %d; rx_queue_id = %d\n",
+ __func__, pi->port_id, rx_queue_id);
+
+ q = eth_dev->data->rx_queues[rx_queue_id];
+ return t4_sge_eth_rxq_stop(adap, q);
+}
+
+static int cxgbe_dev_rx_queue_setup(struct rte_eth_dev *eth_dev,
+ uint16_t queue_idx, uint16_t nb_desc,
+ unsigned int socket_id,
+ const struct rte_eth_rxconf *rx_conf,
+ struct rte_mempool *mp)
+{
+ struct port_info *pi = (struct port_info *)(eth_dev->data->dev_private);
+ struct adapter *adapter = pi->adapter;
+ struct sge *s = &adapter->sge;
+ struct sge_eth_rxq *rxq = &s->ethrxq[pi->first_qset + queue_idx];
+ int err = 0;
+ int msi_idx = 0;
+ unsigned int temp_nb_desc;
+
+ RTE_SET_USED(rx_conf);
+
+ dev_debug(adapter, "%s: eth_dev->data->nb_rx_queues = %d; queue_idx = %d; nb_desc = %d; socket_id = %d; mp = %p\n",
+ __func__, eth_dev->data->nb_rx_queues, queue_idx, nb_desc,
+ socket_id, mp);
+
+ /* Free up the existing queue */
+ if (eth_dev->data->rx_queues[queue_idx]) {
+ cxgbe_dev_rx_queue_release(eth_dev->data->rx_queues[queue_idx]);
+ eth_dev->data->rx_queues[queue_idx] = NULL;
+ }
+
+ eth_dev->data->rx_queues[queue_idx] = (void *)rxq;
+
+ /* Sanity Checking
+ *
+ * nb_desc should be > 0 and <= CXGBE_MAX_RING_DESC_SIZE
+ */
+ temp_nb_desc = nb_desc;
+ if (nb_desc < CXGBE_MIN_RING_DESC_SIZE) {
+ dev_warn(adapter, "%s: number of descriptors must be >= %d. Using default [%d]\n",
+ __func__, CXGBE_MIN_RING_DESC_SIZE,
+ CXGBE_DEFAULT_RX_DESC_SIZE);
+ temp_nb_desc = CXGBE_DEFAULT_RX_DESC_SIZE;
+ } else if (nb_desc > CXGBE_MAX_RING_DESC_SIZE) {
+ dev_err(adapter, "%s: number of descriptors must be between %d and %d inclusive. Default [%d]\n",
+ __func__, CXGBE_MIN_RING_DESC_SIZE,
+ CXGBE_MAX_RING_DESC_SIZE, CXGBE_DEFAULT_RX_DESC_SIZE);
+ return -(EINVAL);
+ }
+
+ rxq->rspq.size = temp_nb_desc;
+ if ((&rxq->fl) != NULL)
+ rxq->fl.size = temp_nb_desc;
+
+ err = t4_sge_alloc_rxq(adapter, &rxq->rspq, false, eth_dev, msi_idx,
+ &rxq->fl, t4_ethrx_handler,
+ t4_get_mps_bg_map(adapter, pi->tx_chan), mp,
+ queue_idx, socket_id);
+
+ dev_debug(adapter, "%s: err = %d; port_id = %d; cntxt_id = %u\n",
+ __func__, err, pi->port_id, rxq->rspq.cntxt_id);
+ return err;
+}
+
+static void cxgbe_dev_rx_queue_release(void *q)
+{
+ struct sge_eth_rxq *rxq = (struct sge_eth_rxq *)q;
+ struct sge_rspq *rq = &rxq->rspq;
+
+ if (rq) {
+ struct port_info *pi = (struct port_info *)
+ (rq->eth_dev->data->dev_private);
+ struct adapter *adap = pi->adapter;
+
+ dev_debug(adapter, "%s: pi->port_id = %d; rx_queue_id = %d\n",
+ __func__, pi->port_id, rxq->rspq.cntxt_id);
+
+ t4_sge_eth_rxq_release(adap, rxq);
+ }
+}
+
static struct eth_dev_ops cxgbe_eth_dev_ops = {
+ .dev_configure = cxgbe_dev_configure,
+ .dev_infos_get = cxgbe_dev_info_get,
+ .rx_queue_setup = cxgbe_dev_rx_queue_setup,
+ .rx_queue_start = cxgbe_dev_rx_queue_start,
+ .rx_queue_stop = cxgbe_dev_rx_queue_stop,
+ .rx_queue_release = cxgbe_dev_rx_queue_release,
};
/*
CXGBE_FUNC_TRACE();
eth_dev->dev_ops = &cxgbe_eth_dev_ops;
+ eth_dev->rx_pkt_burst = &cxgbe_recv_pkts;
/* for secondary processes, we don't initialise any further as primary
* has already done this work.
#include "t4_msg.h"
#include "cxgbe.h"
+/*
+ * Response queue handler for the FW event queue.
+ */
+static int fwevtq_handler(struct sge_rspq *q, const __be64 *rsp,
+ __rte_unused const struct pkt_gl *gl)
+{
+ u8 opcode = ((const struct rss_header *)rsp)->opcode;
+
+ rsp++; /* skip RSS header */
+
+ /*
+ * FW can send EGR_UPDATEs encapsulated in a CPL_FW4_MSG.
+ */
+ if (unlikely(opcode == CPL_FW4_MSG &&
+ ((const struct cpl_fw4_msg *)rsp)->type ==
+ FW_TYPE_RSSCPL)) {
+ rsp++;
+ opcode = ((const struct rss_header *)rsp)->opcode;
+ rsp++;
+ if (opcode != CPL_SGE_EGR_UPDATE) {
+ dev_err(q->adapter, "unexpected FW4/CPL %#x on FW event queue\n",
+ opcode);
+ goto out;
+ }
+ }
+
+ if (likely(opcode == CPL_SGE_EGR_UPDATE)) {
+ /* do nothing */
+ } else if (opcode == CPL_FW6_MSG || opcode == CPL_FW4_MSG) {
+ const struct cpl_fw6_msg *msg = (const void *)rsp;
+
+ t4_handle_fw_rpl(q->adapter, msg->data);
+ } else {
+ dev_err(adapter, "unexpected CPL %#x on FW event queue\n",
+ opcode);
+ }
+out:
+ return 0;
+}
+
+int setup_sge_fwevtq(struct adapter *adapter)
+{
+ struct sge *s = &adapter->sge;
+ int err = 0;
+ int msi_idx = 0;
+
+ err = t4_sge_alloc_rxq(adapter, &s->fw_evtq, true, adapter->eth_dev,
+ msi_idx, NULL, fwevtq_handler, -1, NULL, 0,
+ rte_socket_id());
+ return err;
+}
+
+static int closest_timer(const struct sge *s, int time)
+{
+ unsigned int i, match = 0;
+ int delta, min_delta = INT_MAX;
+
+ for (i = 0; i < ARRAY_SIZE(s->timer_val); i++) {
+ delta = time - s->timer_val[i];
+ if (delta < 0)
+ delta = -delta;
+ if (delta < min_delta) {
+ min_delta = delta;
+ match = i;
+ }
+ }
+ return match;
+}
+
+static int closest_thres(const struct sge *s, int thres)
+{
+ unsigned int i, match = 0;
+ int delta, min_delta = INT_MAX;
+
+ for (i = 0; i < ARRAY_SIZE(s->counter_val); i++) {
+ delta = thres - s->counter_val[i];
+ if (delta < 0)
+ delta = -delta;
+ if (delta < min_delta) {
+ min_delta = delta;
+ match = i;
+ }
+ }
+ return match;
+}
+
+/**
+ * cxgb4_set_rspq_intr_params - set a queue's interrupt holdoff parameters
+ * @q: the Rx queue
+ * @us: the hold-off time in us, or 0 to disable timer
+ * @cnt: the hold-off packet count, or 0 to disable counter
+ *
+ * Sets an Rx queue's interrupt hold-off time and packet count. At least
+ * one of the two needs to be enabled for the queue to generate interrupts.
+ */
+int cxgb4_set_rspq_intr_params(struct sge_rspq *q, unsigned int us,
+ unsigned int cnt)
+{
+ struct adapter *adap = q->adapter;
+ unsigned int timer_val;
+
+ if (cnt) {
+ int err;
+ u32 v, new_idx;
+
+ new_idx = closest_thres(&adap->sge, cnt);
+ if (q->desc && q->pktcnt_idx != new_idx) {
+ /* the queue has already been created, update it */
+ v = V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_DMAQ) |
+ V_FW_PARAMS_PARAM_X(
+ FW_PARAMS_PARAM_DMAQ_IQ_INTCNTTHRESH) |
+ V_FW_PARAMS_PARAM_YZ(q->cntxt_id);
+ err = t4_set_params(adap, adap->mbox, adap->pf, 0, 1,
+ &v, &new_idx);
+ if (err)
+ return err;
+ }
+ q->pktcnt_idx = new_idx;
+ }
+
+ timer_val = (us == 0) ? X_TIMERREG_RESTART_COUNTER :
+ closest_timer(&adap->sge, us);
+
+ if ((us | cnt) == 0)
+ q->intr_params = V_QINTR_TIMER_IDX(X_TIMERREG_UPDATE_CIDX);
+ else
+ q->intr_params = V_QINTR_TIMER_IDX(timer_val) |
+ V_QINTR_CNT_EN(cnt > 0);
+ return 0;
+}
+
+static inline bool is_x_1g_port(const struct link_config *lc)
+{
+ return ((lc->supported & FW_PORT_CAP_SPEED_1G) != 0);
+}
+
+static inline bool is_x_10g_port(const struct link_config *lc)
+{
+ return ((lc->supported & FW_PORT_CAP_SPEED_10G) != 0 ||
+ (lc->supported & FW_PORT_CAP_SPEED_40G) != 0 ||
+ (lc->supported & FW_PORT_CAP_SPEED_100G) != 0);
+}
+
+inline void init_rspq(struct adapter *adap, struct sge_rspq *q,
+ unsigned int us, unsigned int cnt,
+ unsigned int size, unsigned int iqe_size)
+{
+ q->adapter = adap;
+ cxgb4_set_rspq_intr_params(q, us, cnt);
+ q->iqe_len = iqe_size;
+ q->size = size;
+}
+
+int cfg_queue_count(struct rte_eth_dev *eth_dev)
+{
+ struct port_info *pi = (struct port_info *)(eth_dev->data->dev_private);
+ struct adapter *adap = pi->adapter;
+ struct sge *s = &adap->sge;
+ unsigned int max_queues = s->max_ethqsets / adap->params.nports;
+
+ if ((eth_dev->data->nb_rx_queues < 1) ||
+ (eth_dev->data->nb_tx_queues < 1))
+ return -EINVAL;
+
+ if ((eth_dev->data->nb_rx_queues > max_queues) ||
+ (eth_dev->data->nb_tx_queues > max_queues))
+ return -EINVAL;
+
+ if (eth_dev->data->nb_rx_queues > pi->rss_size)
+ return -EINVAL;
+
+ /* We must configure RSS, since config has changed*/
+ pi->flags &= ~PORT_RSS_DONE;
+
+ pi->n_rx_qsets = eth_dev->data->nb_rx_queues;
+ pi->n_tx_qsets = eth_dev->data->nb_tx_queues;
+
+ return 0;
+}
+
+void cfg_queues(struct rte_eth_dev *eth_dev)
+{
+ struct rte_config *config = rte_eal_get_configuration();
+ struct port_info *pi = (struct port_info *)(eth_dev->data->dev_private);
+ struct adapter *adap = pi->adapter;
+ struct sge *s = &adap->sge;
+ unsigned int i, nb_ports = 0, qidx = 0;
+ unsigned int q_per_port = 0;
+
+ if (!(adap->flags & CFG_QUEUES)) {
+ for_each_port(adap, i) {
+ struct port_info *tpi = adap2pinfo(adap, i);
+
+ nb_ports += (is_x_10g_port(&tpi->link_cfg)) ||
+ is_x_1g_port(&tpi->link_cfg) ? 1 : 0;
+ }
+
+ /*
+ * We default up to # of cores queues per 1G/10G port.
+ */
+ if (nb_ports)
+ q_per_port = (MAX_ETH_QSETS -
+ (adap->params.nports - nb_ports)) /
+ nb_ports;
+
+ if (q_per_port > config->lcore_count)
+ q_per_port = config->lcore_count;
+
+ for_each_port(adap, i) {
+ struct port_info *pi = adap2pinfo(adap, i);
+
+ pi->first_qset = qidx;
+
+ /* Initially n_rx_qsets == n_tx_qsets */
+ pi->n_rx_qsets = (is_x_10g_port(&pi->link_cfg) ||
+ is_x_1g_port(&pi->link_cfg)) ?
+ q_per_port : 1;
+ pi->n_tx_qsets = pi->n_rx_qsets;
+
+ if (pi->n_rx_qsets > pi->rss_size)
+ pi->n_rx_qsets = pi->rss_size;
+
+ qidx += pi->n_rx_qsets;
+ }
+
+ s->max_ethqsets = qidx;
+
+ for (i = 0; i < ARRAY_SIZE(s->ethrxq); i++) {
+ struct sge_eth_rxq *r = &s->ethrxq[i];
+
+ init_rspq(adap, &r->rspq, 0, 0, 1024, 64);
+ r->usembufs = 1;
+ r->fl.size = (r->usembufs ? 1024 : 72);
+ }
+
+ for (i = 0; i < ARRAY_SIZE(s->ethtxq); i++)
+ s->ethtxq[i].q.size = 1024;
+
+ init_rspq(adap, &adap->sge.fw_evtq, 0, 0, 1024, 64);
+ adap->flags |= CFG_QUEUES;
+ }
+}
+
static void setup_memwin(struct adapter *adap)
{
u32 mem_win0_base;
MEMWIN_NIC));
}
+static int init_rss(struct adapter *adap)
+{
+ unsigned int i;
+ int err;
+
+ err = t4_init_rss_mode(adap, adap->mbox);
+ if (err)
+ return err;
+
+ for_each_port(adap, i) {
+ struct port_info *pi = adap2pinfo(adap, i);
+
+ pi->rss = rte_zmalloc(NULL, pi->rss_size, 0);
+ if (!pi->rss)
+ return -ENOMEM;
+ }
+ return 0;
+}
+
static void print_port_info(struct adapter *adap)
{
int i;
pi->port_id, pi->mod_type);
}
+/**
+ * cxgb4_write_rss - write the RSS table for a given port
+ * @pi: the port
+ * @queues: array of queue indices for RSS
+ *
+ * Sets up the portion of the HW RSS table for the port's VI to distribute
+ * packets to the Rx queues in @queues.
+ */
+int cxgb4_write_rss(const struct port_info *pi, const u16 *queues)
+{
+ u16 *rss;
+ int i, err;
+ struct adapter *adapter = pi->adapter;
+ const struct sge_eth_rxq *rxq;
+
+ /* Should never be called before setting up sge eth rx queues */
+ BUG_ON(!(adapter->flags & FULL_INIT_DONE));
+
+ rxq = &adapter->sge.ethrxq[pi->first_qset];
+ rss = rte_zmalloc(NULL, pi->rss_size * sizeof(u16), 0);
+ if (!rss)
+ return -ENOMEM;
+
+ /* map the queue indices to queue ids */
+ for (i = 0; i < pi->rss_size; i++, queues++)
+ rss[i] = rxq[*queues].rspq.abs_id;
+
+ err = t4_config_rss_range(adapter, adapter->pf, pi->viid, 0,
+ pi->rss_size, rss, pi->rss_size);
+ /*
+ * If Tunnel All Lookup isn't specified in the global RSS
+ * Configuration, then we need to specify a default Ingress
+ * Queue for any ingress packets which aren't hashed. We'll
+ * use our first ingress queue ...
+ */
+ if (!err)
+ err = t4_config_vi_rss(adapter, adapter->mbox, pi->viid,
+ F_FW_RSS_VI_CONFIG_CMD_IP6FOURTUPEN |
+ F_FW_RSS_VI_CONFIG_CMD_IP6TWOTUPEN |
+ F_FW_RSS_VI_CONFIG_CMD_IP4FOURTUPEN |
+ F_FW_RSS_VI_CONFIG_CMD_IP4TWOTUPEN |
+ F_FW_RSS_VI_CONFIG_CMD_UDPEN,
+ rss[0]);
+ rte_free(rss);
+ return err;
+}
+
+/**
+ * setup_rss - configure RSS
+ * @adapter: the adapter
+ *
+ * Sets up RSS to distribute packets to multiple receive queues. We
+ * configure the RSS CPU lookup table to distribute to the number of HW
+ * receive queues, and the response queue lookup table to narrow that
+ * down to the response queues actually configured for each port.
+ * We always configure the RSS mapping for all ports since the mapping
+ * table has plenty of entries.
+ */
+int setup_rss(struct port_info *pi)
+{
+ int j, err;
+ struct adapter *adapter = pi->adapter;
+
+ dev_debug(adapter, "%s: pi->rss_size = %u; pi->n_rx_qsets = %u\n",
+ __func__, pi->rss_size, pi->n_rx_qsets);
+
+ if (!pi->flags & PORT_RSS_DONE) {
+ if (adapter->flags & FULL_INIT_DONE) {
+ /* Fill default values with equal distribution */
+ for (j = 0; j < pi->rss_size; j++)
+ pi->rss[j] = j % pi->n_rx_qsets;
+
+ err = cxgb4_write_rss(pi, pi->rss);
+ if (err)
+ return err;
+ pi->flags |= PORT_RSS_DONE;
+ }
+ }
+ return 0;
+}
+
int cxgbe_probe(struct adapter *adapter)
{
struct port_info *pi;
pi->eth_dev->data->dev_private = pi;
pi->eth_dev->driver = adapter->eth_dev->driver;
pi->eth_dev->dev_ops = adapter->eth_dev->dev_ops;
+ pi->eth_dev->rx_pkt_burst = adapter->eth_dev->rx_pkt_burst;
TAILQ_INIT(&pi->eth_dev->link_intr_cbs);
pi->eth_dev->data->mac_addrs = rte_zmalloc(name,
}
}
+ cfg_queues(adapter->eth_dev);
+
print_port_info(adapter);
+ err = init_rss(adapter);
+ if (err)
+ goto out_free;
+
return 0;
out_free:
#include "t4_msg.h"
#include "cxgbe.h"
+/*
+ * Max number of Rx buffers we replenish at a time.
+ */
+#define MAX_RX_REFILL 16U
+
+#define NOMEM_TMR_IDX (SGE_NTIMERS - 1)
+
/*
* Rx buffer sizes for "usembufs" Free List buffers (one ingress packet
* per mbuf buffer). We currently only support two sizes for 1500- and
RX_LARGE_MTU_BUF = 0x3, /* large MTU buffer */
};
+/**
+ * fl_cap - return the capacity of a free-buffer list
+ * @fl: the FL
+ *
+ * Returns the capacity of a free-buffer list. The capacity is less than
+ * the size because one descriptor needs to be left unpopulated, otherwise
+ * HW will think the FL is empty.
+ */
+static inline unsigned int fl_cap(const struct sge_fl *fl)
+{
+ return fl->size - 8; /* 1 descriptor = 8 buffers */
+}
+
+/**
+ * fl_starving - return whether a Free List is starving.
+ * @adapter: pointer to the adapter
+ * @fl: the Free List
+ *
+ * Tests specified Free List to see whether the number of buffers
+ * available to the hardware has falled below our "starvation"
+ * threshold.
+ */
+static inline bool fl_starving(const struct adapter *adapter,
+ const struct sge_fl *fl)
+{
+ const struct sge *s = &adapter->sge;
+
+ return fl->avail - fl->pend_cred <= s->fl_starve_thres;
+}
+
+static inline unsigned int get_buf_size(struct adapter *adapter,
+ const struct rx_sw_desc *d)
+{
+ struct sge *s = &adapter->sge;
+ unsigned int rx_buf_size_idx = d->dma_addr & RX_BUF_SIZE;
+ unsigned int buf_size;
+
+ switch (rx_buf_size_idx) {
+ case RX_SMALL_PG_BUF:
+ buf_size = PAGE_SIZE;
+ break;
+
+ case RX_LARGE_PG_BUF:
+ buf_size = PAGE_SIZE << s->fl_pg_order;
+ break;
+
+ case RX_SMALL_MTU_BUF:
+ buf_size = FL_MTU_SMALL_BUFSIZE(adapter);
+ break;
+
+ case RX_LARGE_MTU_BUF:
+ buf_size = FL_MTU_LARGE_BUFSIZE(adapter);
+ break;
+
+ default:
+ BUG_ON(1);
+ buf_size = 0; /* deal with bogus compiler warnings */
+ /* NOTREACHED */
+ }
+
+ return buf_size;
+}
+
+/**
+ * free_rx_bufs - free the Rx buffers on an SGE free list
+ * @q: the SGE free list to free buffers from
+ * @n: how many buffers to free
+ *
+ * Release the next @n buffers on an SGE free-buffer Rx queue. The
+ * buffers must be made inaccessible to HW before calling this function.
+ */
+static void free_rx_bufs(struct sge_fl *q, int n)
+{
+ unsigned int cidx = q->cidx;
+ struct rx_sw_desc *d;
+
+ d = &q->sdesc[cidx];
+ while (n--) {
+ if (d->buf) {
+ rte_pktmbuf_free(d->buf);
+ d->buf = NULL;
+ }
+ ++d;
+ if (++cidx == q->size) {
+ cidx = 0;
+ d = q->sdesc;
+ }
+ q->avail--;
+ }
+ q->cidx = cidx;
+}
+
+/**
+ * unmap_rx_buf - unmap the current Rx buffer on an SGE free list
+ * @q: the SGE free list
+ *
+ * Unmap the current buffer on an SGE free-buffer Rx queue. The
+ * buffer must be made inaccessible to HW before calling this function.
+ *
+ * This is similar to @free_rx_bufs above but does not free the buffer.
+ * Do note that the FL still loses any further access to the buffer.
+ */
+static void unmap_rx_buf(struct sge_fl *q)
+{
+ if (++q->cidx == q->size)
+ q->cidx = 0;
+ q->avail--;
+}
+
+static inline void ring_fl_db(struct adapter *adap, struct sge_fl *q)
+{
+ if (q->pend_cred >= 8) {
+ u32 val = adap->params.arch.sge_fl_db;
+
+ if (is_t4(adap->params.chip))
+ val |= V_PIDX(q->pend_cred / 8);
+ else
+ val |= V_PIDX_T5(q->pend_cred / 8);
+
+ /*
+ * Make sure all memory writes to the Free List queue are
+ * committed before we tell the hardware about them.
+ */
+ wmb();
+
+ /*
+ * If we don't have access to the new User Doorbell (T5+), use
+ * the old doorbell mechanism; otherwise use the new BAR2
+ * mechanism.
+ */
+ if (unlikely(!q->bar2_addr)) {
+ t4_write_reg(adap, MYPF_REG(A_SGE_PF_KDOORBELL),
+ val | V_QID(q->cntxt_id));
+ } else {
+ writel(val | V_QID(q->bar2_qid),
+ (void *)((uintptr_t)q->bar2_addr +
+ SGE_UDB_KDOORBELL));
+
+ /*
+ * This Write memory Barrier will force the write to
+ * the User Doorbell area to be flushed.
+ */
+ wmb();
+ }
+ q->pend_cred &= 7;
+ }
+}
+
+static inline struct rte_mbuf *cxgbe_rxmbuf_alloc(struct rte_mempool *mp)
+{
+ struct rte_mbuf *m;
+
+ m = __rte_mbuf_raw_alloc(mp);
+ __rte_mbuf_sanity_check_raw(m, 0);
+ return m;
+}
+
+static inline void set_rx_sw_desc(struct rx_sw_desc *sd, void *buf,
+ dma_addr_t mapping)
+{
+ sd->buf = buf;
+ sd->dma_addr = mapping; /* includes size low bits */
+}
+
+/**
+ * refill_fl_usembufs - refill an SGE Rx buffer ring with mbufs
+ * @adap: the adapter
+ * @q: the ring to refill
+ * @n: the number of new buffers to allocate
+ *
+ * (Re)populate an SGE free-buffer queue with up to @n new packet buffers,
+ * allocated with the supplied gfp flags. The caller must assure that
+ * @n does not exceed the queue's capacity. If afterwards the queue is
+ * found critically low mark it as starving in the bitmap of starving FLs.
+ *
+ * Returns the number of buffers allocated.
+ */
+static unsigned int refill_fl_usembufs(struct adapter *adap, struct sge_fl *q,
+ int n)
+{
+ struct sge_eth_rxq *rxq = container_of(q, struct sge_eth_rxq, fl);
+ unsigned int cred = q->avail;
+ __be64 *d = &q->desc[q->pidx];
+ struct rx_sw_desc *sd = &q->sdesc[q->pidx];
+ unsigned int buf_size_idx = RX_SMALL_MTU_BUF;
+
+ while (n--) {
+ struct rte_mbuf *mbuf = cxgbe_rxmbuf_alloc(rxq->rspq.mb_pool);
+ dma_addr_t mapping;
+
+ if (!mbuf) {
+ dev_debug(adap, "%s: mbuf alloc failed\n", __func__);
+ q->alloc_failed++;
+ rxq->rspq.eth_dev->data->rx_mbuf_alloc_failed++;
+ goto out;
+ }
+
+ mbuf->data_off = RTE_PKTMBUF_HEADROOM;
+ mbuf->next = NULL;
+
+ mapping = (dma_addr_t)(mbuf->buf_physaddr + mbuf->data_off);
+
+ mapping |= buf_size_idx;
+ *d++ = cpu_to_be64(mapping);
+ set_rx_sw_desc(sd, mbuf, mapping);
+ sd++;
+
+ q->avail++;
+ if (++q->pidx == q->size) {
+ q->pidx = 0;
+ sd = q->sdesc;
+ d = q->desc;
+ }
+ }
+
+out: cred = q->avail - cred;
+ q->pend_cred += cred;
+ ring_fl_db(adap, q);
+
+ if (unlikely(fl_starving(adap, q))) {
+ /*
+ * Make sure data has been written to free list
+ */
+ wmb();
+ q->low++;
+ }
+
+ return cred;
+}
+
+/**
+ * refill_fl - refill an SGE Rx buffer ring with mbufs
+ * @adap: the adapter
+ * @q: the ring to refill
+ * @n: the number of new buffers to allocate
+ *
+ * (Re)populate an SGE free-buffer queue with up to @n new packet buffers,
+ * allocated with the supplied gfp flags. The caller must assure that
+ * @n does not exceed the queue's capacity. Returns the number of buffers
+ * allocated.
+ */
+static unsigned int refill_fl(struct adapter *adap, struct sge_fl *q, int n)
+{
+ return refill_fl_usembufs(adap, q, n);
+}
+
+static inline void __refill_fl(struct adapter *adap, struct sge_fl *fl)
+{
+ refill_fl(adap, fl, min(MAX_RX_REFILL, fl_cap(fl) - fl->avail));
+}
+
+/**
+ * alloc_ring - allocate resources for an SGE descriptor ring
+ * @dev: the PCI device's core device
+ * @nelem: the number of descriptors
+ * @elem_size: the size of each descriptor
+ * @sw_size: the size of the SW state associated with each ring element
+ * @phys: the physical address of the allocated ring
+ * @metadata: address of the array holding the SW state for the ring
+ * @stat_size: extra space in HW ring for status information
+ * @node: preferred node for memory allocations
+ *
+ * Allocates resources for an SGE descriptor ring, such as Tx queues,
+ * free buffer lists, or response queues. Each SGE ring requires
+ * space for its HW descriptors plus, optionally, space for the SW state
+ * associated with each HW entry (the metadata). The function returns
+ * three values: the virtual address for the HW ring (the return value
+ * of the function), the bus address of the HW ring, and the address
+ * of the SW ring.
+ */
+static void *alloc_ring(size_t nelem, size_t elem_size,
+ size_t sw_size, dma_addr_t *phys, void *metadata,
+ size_t stat_size, __rte_unused uint16_t queue_id,
+ int socket_id, const char *z_name,
+ const char *z_name_sw)
+{
+ size_t len = CXGBE_MAX_RING_DESC_SIZE * elem_size + stat_size;
+ const struct rte_memzone *tz;
+ void *s = NULL;
+
+ dev_debug(adapter, "%s: nelem = %zu; elem_size = %zu; sw_size = %zu; "
+ "stat_size = %zu; queue_id = %u; socket_id = %d; z_name = %s;"
+ " z_name_sw = %s\n", __func__, nelem, elem_size, sw_size,
+ stat_size, queue_id, socket_id, z_name, z_name_sw);
+
+ tz = rte_memzone_lookup(z_name);
+ if (tz) {
+ dev_debug(adapter, "%s: tz exists...returning existing..\n",
+ __func__);
+ goto alloc_sw_ring;
+ }
+
+ /*
+ * Allocate TX/RX ring hardware descriptors. A memzone large enough to
+ * handle the maximum ring size is allocated in order to allow for
+ * resizing in later calls to the queue setup function.
+ */
+ tz = rte_memzone_reserve_aligned(z_name, len, socket_id, 0, 4096);
+ if (!tz)
+ return NULL;
+
+alloc_sw_ring:
+ memset(tz->addr, 0, len);
+ if (sw_size) {
+ s = rte_zmalloc_socket(z_name_sw, nelem * sw_size,
+ RTE_CACHE_LINE_SIZE, socket_id);
+
+ if (!s) {
+ dev_err(adapter, "%s: failed to get sw_ring memory\n",
+ __func__);
+ return NULL;
+ }
+ }
+ if (metadata)
+ *(void **)metadata = s;
+
+ *phys = (uint64_t)tz->phys_addr;
+ return tz->addr;
+}
+
+/**
+ * t4_pktgl_to_mbuf_usembufs - build an mbuf from a packet gather list
+ * @gl: the gather list
+ *
+ * Builds an mbuf from the given packet gather list. Returns the mbuf or
+ * %NULL if mbuf allocation failed.
+ */
+static struct rte_mbuf *t4_pktgl_to_mbuf_usembufs(const struct pkt_gl *gl)
+{
+ /*
+ * If there's only one mbuf fragment, just return that.
+ */
+ if (likely(gl->nfrags == 1))
+ return gl->mbufs[0];
+
+ return NULL;
+}
+
+/**
+ * t4_pktgl_to_mbuf - build an mbuf from a packet gather list
+ * @gl: the gather list
+ *
+ * Builds an mbuf from the given packet gather list. Returns the mbuf or
+ * %NULL if mbuf allocation failed.
+ */
+static struct rte_mbuf *t4_pktgl_to_mbuf(const struct pkt_gl *gl)
+{
+ return t4_pktgl_to_mbuf_usembufs(gl);
+}
+
+#define RTE_MBUF_DATA_DMA_ADDR_DEFAULT(mb) \
+ ((dma_addr_t) ((mb)->buf_physaddr + (mb)->data_off))
+
+/**
+ * t4_ethrx_handler - process an ingress ethernet packet
+ * @q: the response queue that received the packet
+ * @rsp: the response queue descriptor holding the RX_PKT message
+ * @si: the gather list of packet fragments
+ *
+ * Process an ingress ethernet packet and deliver it to the stack.
+ */
+int t4_ethrx_handler(struct sge_rspq *q, const __be64 *rsp,
+ const struct pkt_gl *si)
+{
+ struct rte_mbuf *mbuf;
+ const struct cpl_rx_pkt *pkt;
+ const struct rss_header *rss_hdr;
+ bool csum_ok;
+ struct sge_eth_rxq *rxq = container_of(q, struct sge_eth_rxq, rspq);
+
+ rss_hdr = (const void *)rsp;
+ pkt = (const void *)&rsp[1];
+ csum_ok = pkt->csum_calc && !pkt->err_vec;
+
+ mbuf = t4_pktgl_to_mbuf(si);
+ if (unlikely(!mbuf)) {
+ rxq->stats.rx_drops++;
+ return 0;
+ }
+
+ mbuf->port = pkt->iff;
+ if (pkt->l2info & htonl(F_RXF_IP)) {
+ mbuf->ol_flags |= PKT_RX_IPV4_HDR;
+ if (unlikely(!csum_ok))
+ mbuf->ol_flags |= PKT_RX_IP_CKSUM_BAD;
+
+ if ((pkt->l2info & htonl(F_RXF_UDP | F_RXF_TCP)) && !csum_ok)
+ mbuf->ol_flags |= PKT_RX_L4_CKSUM_BAD;
+ } else if (pkt->l2info & htonl(F_RXF_IP6)) {
+ mbuf->ol_flags |= PKT_RX_IPV6_HDR;
+ }
+
+ mbuf->port = pkt->iff;
+
+ if (!rss_hdr->filter_tid && rss_hdr->hash_type) {
+ mbuf->ol_flags |= PKT_RX_RSS_HASH;
+ mbuf->hash.rss = ntohl(rss_hdr->hash_val);
+ }
+
+ if (pkt->vlan_ex) {
+ mbuf->ol_flags |= PKT_RX_VLAN_PKT;
+ mbuf->vlan_tci = ntohs(pkt->vlan);
+ }
+ rxq->stats.pkts++;
+ rxq->stats.rx_bytes += mbuf->pkt_len;
+
+ return 0;
+}
+
+/**
+ * restore_rx_bufs - put back a packet's Rx buffers
+ * @q: the SGE free list
+ * @frags: number of FL buffers to restore
+ *
+ * Puts back on an FL the Rx buffers. The buffers have already been
+ * unmapped and are left unmapped, we mark them so to prevent further
+ * unmapping attempts.
+ *
+ * This function undoes a series of @unmap_rx_buf calls when we find out
+ * that the current packet can't be processed right away afterall and we
+ * need to come back to it later. This is a very rare event and there's
+ * no effort to make this particularly efficient.
+ */
+static void restore_rx_bufs(struct sge_fl *q, int frags)
+{
+ while (frags--) {
+ if (q->cidx == 0)
+ q->cidx = q->size - 1;
+ else
+ q->cidx--;
+ q->avail++;
+ }
+}
+
+/**
+ * is_new_response - check if a response is newly written
+ * @r: the response descriptor
+ * @q: the response queue
+ *
+ * Returns true if a response descriptor contains a yet unprocessed
+ * response.
+ */
+static inline bool is_new_response(const struct rsp_ctrl *r,
+ const struct sge_rspq *q)
+{
+ return (r->u.type_gen >> S_RSPD_GEN) == q->gen;
+}
+
+#define CXGB4_MSG_AN ((void *)1)
+
+/**
+ * rspq_next - advance to the next entry in a response queue
+ * @q: the queue
+ *
+ * Updates the state of a response queue to advance it to the next entry.
+ */
+static inline void rspq_next(struct sge_rspq *q)
+{
+ q->cur_desc = (const __be64 *)((const char *)q->cur_desc + q->iqe_len);
+ if (unlikely(++q->cidx == q->size)) {
+ q->cidx = 0;
+ q->gen ^= 1;
+ q->cur_desc = q->desc;
+ }
+}
+
+/**
+ * process_responses - process responses from an SGE response queue
+ * @q: the ingress queue to process
+ * @budget: how many responses can be processed in this round
+ * @rx_pkts: mbuf to put the pkts
+ *
+ * Process responses from an SGE response queue up to the supplied budget.
+ * Responses include received packets as well as control messages from FW
+ * or HW.
+ *
+ * Additionally choose the interrupt holdoff time for the next interrupt
+ * on this queue. If the system is under memory shortage use a fairly
+ * long delay to help recovery.
+ */
+static int process_responses(struct sge_rspq *q, int budget,
+ struct rte_mbuf **rx_pkts)
+{
+ int ret = 0, rsp_type;
+ int budget_left = budget;
+ const struct rsp_ctrl *rc;
+ struct sge_eth_rxq *rxq = container_of(q, struct sge_eth_rxq, rspq);
+ struct adapter *adapter = q->adapter;
+
+ while (likely(budget_left)) {
+ rc = (const struct rsp_ctrl *)
+ ((const char *)q->cur_desc + (q->iqe_len - sizeof(*rc)));
+
+ if (!is_new_response(rc, q))
+ break;
+
+ /*
+ * Ensure response has been read
+ */
+ rmb();
+ rsp_type = G_RSPD_TYPE(rc->u.type_gen);
+
+ if (likely(rsp_type == X_RSPD_TYPE_FLBUF)) {
+ struct pkt_gl si;
+ const struct rx_sw_desc *rsd;
+ struct rte_mbuf *pkt = NULL;
+ u32 len = ntohl(rc->pldbuflen_qid), bufsz, frags;
+
+ si.usembufs = rxq->usembufs;
+ /*
+ * In "use mbufs" mode, we don't pack multiple
+ * ingress packets per buffer (mbuf) so we
+ * should _always_ get a "New Buffer" flags
+ * from the SGE. Also, since we hand the
+ * mbuf's up to the host stack for it to
+ * eventually free, we don't release the mbuf's
+ * in the driver (in contrast to the "packed
+ * page" mode where the driver needs to
+ * release its reference on the page buffers).
+ */
+ BUG_ON(!(len & F_RSPD_NEWBUF));
+ len = G_RSPD_LEN(len);
+ si.tot_len = len;
+
+ /* gather packet fragments */
+ for (frags = 0; len; frags++) {
+ rsd = &rxq->fl.sdesc[rxq->fl.cidx];
+ bufsz = min(get_buf_size(adapter, rsd), len);
+ pkt = rsd->buf;
+ pkt->data_len = bufsz;
+ pkt->pkt_len = bufsz;
+ si.mbufs[frags] = pkt;
+ len -= bufsz;
+ unmap_rx_buf(&rxq->fl);
+ }
+
+ si.va = RTE_PTR_ADD(si.mbufs[0]->buf_addr,
+ si.mbufs[0]->data_off);
+ rte_prefetch1(si.va);
+
+ /*
+ * For the "use mbuf" case here, we can end up
+ * chewing through our Free List very rapidly
+ * with one entry per Ingress packet getting
+ * consumed. So if the handler() successfully
+ * consumed the mbuf, check to see if we can
+ * refill the Free List incrementally in the
+ * loop ...
+ */
+ si.nfrags = frags;
+ ret = q->handler(q, q->cur_desc, &si);
+
+ if (unlikely(ret != 0)) {
+ restore_rx_bufs(&rxq->fl, frags);
+ } else {
+ rx_pkts[budget - budget_left] = pkt;
+ if (fl_cap(&rxq->fl) - rxq->fl.avail >= 8)
+ __refill_fl(q->adapter, &rxq->fl);
+ }
+
+ } else if (likely(rsp_type == X_RSPD_TYPE_CPL)) {
+ ret = q->handler(q, q->cur_desc, NULL);
+ } else {
+ ret = q->handler(q, (const __be64 *)rc, CXGB4_MSG_AN);
+ }
+
+ if (unlikely(ret)) {
+ /* couldn't process descriptor, back off for recovery */
+ q->next_intr_params = V_QINTR_TIMER_IDX(NOMEM_TMR_IDX);
+ break;
+ }
+
+ rspq_next(q);
+ budget_left--;
+ }
+
+ /*
+ * If this is a Response Queue with an associated Free List and
+ * there's room for another chunk of new Free List buffer pointers,
+ * refill the Free List.
+ */
+
+ if (q->offset >= 0 && fl_cap(&rxq->fl) - rxq->fl.avail >= 8)
+ __refill_fl(q->adapter, &rxq->fl);
+
+ return budget - budget_left;
+}
+
+int cxgbe_poll(struct sge_rspq *q, struct rte_mbuf **rx_pkts,
+ unsigned int budget, unsigned int *work_done)
+{
+ unsigned int params;
+ u32 val;
+ int err = 0;
+
+ *work_done = process_responses(q, budget, rx_pkts);
+ params = V_QINTR_TIMER_IDX(X_TIMERREG_UPDATE_CIDX);
+ q->next_intr_params = params;
+ val = V_CIDXINC(*work_done) | V_SEINTARM(params);
+
+ if (*work_done) {
+ /*
+ * If we don't have access to the new User GTS (T5+),
+ * use the old doorbell mechanism; otherwise use the new
+ * BAR2 mechanism.
+ */
+ if (unlikely(!q->bar2_addr))
+ t4_write_reg(q->adapter, MYPF_REG(A_SGE_PF_GTS),
+ val | V_INGRESSQID((u32)q->cntxt_id));
+ else {
+ writel(val | V_INGRESSQID(q->bar2_qid),
+ (void *)((uintptr_t)q->bar2_addr +
+ SGE_UDB_GTS));
+ /*
+ * This Write memory Barrier will force the write to
+ * the User Doorbell area to be flushed.
+ */
+ wmb();
+ }
+ }
+
+ return err;
+}
+
+/**
+ * bar2_address - return the BAR2 address for an SGE Queue's Registers
+ * @adapter: the adapter
+ * @qid: the SGE Queue ID
+ * @qtype: the SGE Queue Type (Egress or Ingress)
+ * @pbar2_qid: BAR2 Queue ID or 0 for Queue ID inferred SGE Queues
+ *
+ * Returns the BAR2 address for the SGE Queue Registers associated with
+ * @qid. If BAR2 SGE Registers aren't available, returns NULL. Also
+ * returns the BAR2 Queue ID to be used with writes to the BAR2 SGE
+ * Queue Registers. If the BAR2 Queue ID is 0, then "Inferred Queue ID"
+ * Registers are supported (e.g. the Write Combining Doorbell Buffer).
+ */
+static void __iomem *bar2_address(struct adapter *adapter, unsigned int qid,
+ enum t4_bar2_qtype qtype,
+ unsigned int *pbar2_qid)
+{
+ u64 bar2_qoffset;
+ int ret;
+
+ ret = t4_bar2_sge_qregs(adapter, qid, qtype, &bar2_qoffset, pbar2_qid);
+ if (ret)
+ return NULL;
+
+ return adapter->bar2 + bar2_qoffset;
+}
+
+int t4_sge_eth_rxq_start(struct adapter *adap, struct sge_rspq *rq)
+{
+ struct sge_eth_rxq *rxq = container_of(rq, struct sge_eth_rxq, rspq);
+ unsigned int fl_id = rxq->fl.size ? rxq->fl.cntxt_id : 0xffff;
+
+ return t4_iq_start_stop(adap, adap->mbox, true, adap->pf, 0,
+ rq->cntxt_id, fl_id, 0xffff);
+}
+
+int t4_sge_eth_rxq_stop(struct adapter *adap, struct sge_rspq *rq)
+{
+ struct sge_eth_rxq *rxq = container_of(rq, struct sge_eth_rxq, rspq);
+ unsigned int fl_id = rxq->fl.size ? rxq->fl.cntxt_id : 0xffff;
+
+ return t4_iq_start_stop(adap, adap->mbox, false, adap->pf, 0,
+ rq->cntxt_id, fl_id, 0xffff);
+}
+
+/*
+ * @intr_idx: MSI/MSI-X vector if >=0, -(absolute qid + 1) if < 0
+ * @cong: < 0 -> no congestion feedback, >= 0 -> congestion channel map
+ */
+int t4_sge_alloc_rxq(struct adapter *adap, struct sge_rspq *iq, bool fwevtq,
+ struct rte_eth_dev *eth_dev, int intr_idx,
+ struct sge_fl *fl, rspq_handler_t hnd, int cong,
+ struct rte_mempool *mp, int queue_id, int socket_id)
+{
+ int ret, flsz = 0;
+ struct fw_iq_cmd c;
+ struct sge *s = &adap->sge;
+ struct port_info *pi = (struct port_info *)(eth_dev->data->dev_private);
+ char z_name[RTE_MEMZONE_NAMESIZE];
+ char z_name_sw[RTE_MEMZONE_NAMESIZE];
+ unsigned int nb_refill;
+
+ /* Size needs to be multiple of 16, including status entry. */
+ iq->size = roundup(iq->size, 16);
+
+ snprintf(z_name, sizeof(z_name), "%s_%s_%d_%d",
+ eth_dev->driver->pci_drv.name, fwevtq ? "fwq_ring" : "rx_ring",
+ eth_dev->data->port_id, queue_id);
+ snprintf(z_name_sw, sizeof(z_name_sw), "%s_sw_ring", z_name);
+
+ iq->desc = alloc_ring(iq->size, iq->iqe_len, 0, &iq->phys_addr, NULL, 0,
+ queue_id, socket_id, z_name, z_name_sw);
+ if (!iq->desc)
+ return -ENOMEM;
+
+ memset(&c, 0, sizeof(c));
+ c.op_to_vfn = htonl(V_FW_CMD_OP(FW_IQ_CMD) | F_FW_CMD_REQUEST |
+ F_FW_CMD_WRITE | F_FW_CMD_EXEC |
+ V_FW_IQ_CMD_PFN(adap->pf) | V_FW_IQ_CMD_VFN(0));
+ c.alloc_to_len16 = htonl(F_FW_IQ_CMD_ALLOC | F_FW_IQ_CMD_IQSTART |
+ (sizeof(c) / 16));
+ c.type_to_iqandstindex =
+ htonl(V_FW_IQ_CMD_TYPE(FW_IQ_TYPE_FL_INT_CAP) |
+ V_FW_IQ_CMD_IQASYNCH(fwevtq) |
+ V_FW_IQ_CMD_VIID(pi->viid) |
+ V_FW_IQ_CMD_IQANDST(intr_idx < 0) |
+ V_FW_IQ_CMD_IQANUD(X_UPDATEDELIVERY_INTERRUPT) |
+ V_FW_IQ_CMD_IQANDSTINDEX(intr_idx >= 0 ? intr_idx :
+ -intr_idx - 1));
+ c.iqdroprss_to_iqesize =
+ htons(V_FW_IQ_CMD_IQPCIECH(pi->tx_chan) |
+ F_FW_IQ_CMD_IQGTSMODE |
+ V_FW_IQ_CMD_IQINTCNTTHRESH(iq->pktcnt_idx) |
+ V_FW_IQ_CMD_IQESIZE(ilog2(iq->iqe_len) - 4));
+ c.iqsize = htons(iq->size);
+ c.iqaddr = cpu_to_be64(iq->phys_addr);
+ if (cong >= 0)
+ c.iqns_to_fl0congen = htonl(F_FW_IQ_CMD_IQFLINTCONGEN);
+
+ if (fl) {
+ struct sge_eth_rxq *rxq = container_of(fl, struct sge_eth_rxq,
+ fl);
+ enum chip_type chip = CHELSIO_CHIP_VERSION(adap->params.chip);
+
+ /*
+ * Allocate the ring for the hardware free list (with space
+ * for its status page) along with the associated software
+ * descriptor ring. The free list size needs to be a multiple
+ * of the Egress Queue Unit and at least 2 Egress Units larger
+ * than the SGE's Egress Congrestion Threshold
+ * (fl_starve_thres - 1).
+ */
+ if (fl->size < s->fl_starve_thres - 1 + 2 * 8)
+ fl->size = s->fl_starve_thres - 1 + 2 * 8;
+ fl->size = roundup(fl->size, 8);
+
+ snprintf(z_name, sizeof(z_name), "%s_%s_%d_%d",
+ eth_dev->driver->pci_drv.name,
+ fwevtq ? "fwq_ring" : "fl_ring",
+ eth_dev->data->port_id, queue_id);
+ snprintf(z_name_sw, sizeof(z_name_sw), "%s_sw_ring", z_name);
+
+ fl->desc = alloc_ring(fl->size, sizeof(__be64),
+ sizeof(struct rx_sw_desc),
+ &fl->addr, &fl->sdesc, s->stat_len,
+ queue_id, socket_id, z_name, z_name_sw);
+
+ if (!fl->desc)
+ goto fl_nomem;
+
+ flsz = fl->size / 8 + s->stat_len / sizeof(struct tx_desc);
+ c.iqns_to_fl0congen |=
+ htonl(V_FW_IQ_CMD_FL0HOSTFCMODE(X_HOSTFCMODE_NONE) |
+ (unlikely(rxq->usembufs) ?
+ 0 : F_FW_IQ_CMD_FL0PACKEN) |
+ F_FW_IQ_CMD_FL0FETCHRO | F_FW_IQ_CMD_FL0DATARO |
+ F_FW_IQ_CMD_FL0PADEN);
+ if (cong >= 0)
+ c.iqns_to_fl0congen |=
+ htonl(V_FW_IQ_CMD_FL0CNGCHMAP(cong) |
+ F_FW_IQ_CMD_FL0CONGCIF |
+ F_FW_IQ_CMD_FL0CONGEN);
+
+ /* In T6, for egress queue type FL there is internal overhead
+ * of 16B for header going into FLM module.
+ * Hence maximum allowed burst size will be 448 bytes.
+ */
+ c.fl0dcaen_to_fl0cidxfthresh =
+ htons(V_FW_IQ_CMD_FL0FBMIN(X_FETCHBURSTMIN_64B) |
+ V_FW_IQ_CMD_FL0FBMAX((chip <= CHELSIO_T5) ?
+ X_FETCHBURSTMAX_512B : X_FETCHBURSTMAX_256B));
+ c.fl0size = htons(flsz);
+ c.fl0addr = cpu_to_be64(fl->addr);
+ }
+
+ ret = t4_wr_mbox(adap, adap->mbox, &c, sizeof(c), &c);
+ if (ret)
+ goto err;
+
+ iq->cur_desc = iq->desc;
+ iq->cidx = 0;
+ iq->gen = 1;
+ iq->next_intr_params = iq->intr_params;
+ iq->cntxt_id = ntohs(c.iqid);
+ iq->abs_id = ntohs(c.physiqid);
+ iq->bar2_addr = bar2_address(adap, iq->cntxt_id, T4_BAR2_QTYPE_INGRESS,
+ &iq->bar2_qid);
+ iq->size--; /* subtract status entry */
+ iq->eth_dev = eth_dev;
+ iq->handler = hnd;
+ iq->mb_pool = mp;
+
+ /* set offset to -1 to distinguish ingress queues without FL */
+ iq->offset = fl ? 0 : -1;
+
+ if (fl) {
+ fl->cntxt_id = ntohs(c.fl0id);
+ fl->avail = 0;
+ fl->pend_cred = 0;
+ fl->pidx = 0;
+ fl->cidx = 0;
+ fl->alloc_failed = 0;
+
+ /*
+ * Note, we must initialize the BAR2 Free List User Doorbell
+ * information before refilling the Free List!
+ */
+ fl->bar2_addr = bar2_address(adap, fl->cntxt_id,
+ T4_BAR2_QTYPE_EGRESS,
+ &fl->bar2_qid);
+
+ nb_refill = refill_fl(adap, fl, fl_cap(fl));
+ if (nb_refill != fl_cap(fl)) {
+ ret = -ENOMEM;
+ dev_err(adap, "%s: mbuf alloc failed with error: %d\n",
+ __func__, ret);
+ goto refill_fl_err;
+ }
+ }
+
+ /*
+ * For T5 and later we attempt to set up the Congestion Manager values
+ * of the new RX Ethernet Queue. This should really be handled by
+ * firmware because it's more complex than any host driver wants to
+ * get involved with and it's different per chip and this is almost
+ * certainly wrong. Formware would be wrong as well, but it would be
+ * a lot easier to fix in one place ... For now we do something very
+ * simple (and hopefully less wrong).
+ */
+ if (!is_t4(adap->params.chip) && cong >= 0) {
+ u32 param, val;
+ int i;
+
+ param = (V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_DMAQ) |
+ V_FW_PARAMS_PARAM_X(FW_PARAMS_PARAM_DMAQ_CONM_CTXT) |
+ V_FW_PARAMS_PARAM_YZ(iq->cntxt_id));
+ if (cong == 0) {
+ val = V_CONMCTXT_CNGTPMODE(X_CONMCTXT_CNGTPMODE_QUEUE);
+ } else {
+ val = V_CONMCTXT_CNGTPMODE(
+ X_CONMCTXT_CNGTPMODE_CHANNEL);
+ for (i = 0; i < 4; i++) {
+ if (cong & (1 << i))
+ val |= V_CONMCTXT_CNGCHMAP(1 <<
+ (i << 2));
+ }
+ }
+ ret = t4_set_params(adap, adap->mbox, adap->pf, 0, 1,
+ ¶m, &val);
+ if (ret)
+ dev_warn(adap->pdev_dev, "Failed to set Congestion Manager Context for Ingress Queue %d: %d\n",
+ iq->cntxt_id, -ret);
+ }
+
+ return 0;
+
+refill_fl_err:
+ t4_iq_free(adap, adap->mbox, adap->pf, 0, FW_IQ_TYPE_FL_INT_CAP,
+ iq->cntxt_id, fl ? fl->cntxt_id : 0xffff, 0xffff);
+fl_nomem:
+ ret = -ENOMEM;
+err:
+ iq->cntxt_id = 0;
+ iq->abs_id = 0;
+ if (iq->desc)
+ iq->desc = NULL;
+
+ if (fl && fl->desc) {
+ rte_free(fl->sdesc);
+ fl->cntxt_id = 0;
+ fl->sdesc = NULL;
+ fl->desc = NULL;
+ }
+ return ret;
+}
+
+static void free_rspq_fl(struct adapter *adap, struct sge_rspq *rq,
+ struct sge_fl *fl)
+{
+ unsigned int fl_id = fl ? fl->cntxt_id : 0xffff;
+
+ t4_iq_free(adap, adap->mbox, adap->pf, 0, FW_IQ_TYPE_FL_INT_CAP,
+ rq->cntxt_id, fl_id, 0xffff);
+ rq->cntxt_id = 0;
+ rq->abs_id = 0;
+ rq->desc = NULL;
+
+ if (fl) {
+ free_rx_bufs(fl, fl->avail);
+ rte_free(fl->sdesc);
+ fl->sdesc = NULL;
+ fl->cntxt_id = 0;
+ fl->desc = NULL;
+ }
+}
+
+void t4_sge_eth_rxq_release(struct adapter *adap, struct sge_eth_rxq *rxq)
+{
+ if (rxq->rspq.desc) {
+ t4_sge_eth_rxq_stop(adap, &rxq->rspq);
+ free_rspq_fl(adap, &rxq->rspq, rxq->fl.size ? &rxq->fl : NULL);
+ }
+}
+
/**
* t4_sge_init - initialize SGE
* @adap: the adapter
git.droids-corp.org / dpdk.git / commitdiff