mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-23 15:49:17 +07:00
IB/iser: Centralize iser completion contexts
Introduce iser_comp which centralizes all iser completion related items and is referenced by iser_device and each ib_conn. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Sagi Grimberg
Roland Dreier
parent
aea8f4df6d
commit
bf17554035
@ -213,7 +213,6 @@ struct iser_data_buf {
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/* fwd declarations */
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struct iser_device;
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struct iser_cq_desc;
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struct iscsi_iser_task;
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struct iscsi_endpoint;
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@ -268,20 +267,34 @@ struct iser_conn;
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struct ib_conn;
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struct iscsi_iser_task;
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/**
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* struct iser_comp - iSER completion context
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*
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* @device: pointer to device handle
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* @rx_cq: RX completion queue
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* @tx_cq: TX completion queue
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* @tasklet: Tasklet handle
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* @active_qps: Number of active QPs attached
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* to completion context
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*/
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struct iser_comp {
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struct iser_device *device;
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struct ib_cq *rx_cq;
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struct ib_cq *tx_cq;
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struct tasklet_struct tasklet;
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int active_qps;
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};
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struct iser_device {
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struct ib_device *ib_device;
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struct ib_pd *pd;
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struct ib_device_attr dev_attr;
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struct ib_cq *rx_cq[ISER_MAX_CQ];
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struct ib_cq *tx_cq[ISER_MAX_CQ];
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struct ib_mr *mr;
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struct tasklet_struct cq_tasklet[ISER_MAX_CQ];
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struct ib_event_handler event_handler;
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struct list_head ig_list; /* entry in ig devices list */
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int refcount;
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int cq_active_qps[ISER_MAX_CQ];
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int cqs_used;
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struct iser_cq_desc *cq_desc;
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int comps_used;
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struct iser_comp comps[ISER_MAX_CQ];
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int (*iser_alloc_rdma_reg_res)(struct ib_conn *ib_conn,
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unsigned cmds_max);
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void (*iser_free_rdma_reg_res)(struct ib_conn *ib_conn);
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@ -327,6 +340,7 @@ struct fast_reg_descriptor {
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* @post_send_buf_count: post send counter
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* @rx_wr: receive work request for batch posts
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* @device: reference to iser device
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* @comp: iser completion context
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* @pi_support: Indicate device T10-PI support
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* @lock: protects fmr/fastreg pool
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* @union.fmr:
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@ -345,7 +359,7 @@ struct ib_conn {
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atomic_t post_send_buf_count;
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struct ib_recv_wr rx_wr[ISER_MIN_POSTED_RX];
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struct iser_device *device;
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int cq_index;
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struct iser_comp *comp;
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bool pi_support;
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spinlock_t lock;
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union {
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@ -404,11 +418,6 @@ struct iser_page_vec {
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int data_size;
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};
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struct iser_cq_desc {
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struct iser_device *device;
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int cq_index;
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};
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struct iser_global {
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struct mutex device_list_mutex;/* */
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struct list_head device_list; /* all iSER devices */
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@ -44,7 +44,7 @@
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static void iser_cq_tasklet_fn(unsigned long data);
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static void iser_cq_callback(struct ib_cq *cq, void *cq_context);
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static int iser_drain_tx_cq(struct iser_device *device, int cq_index);
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static int iser_drain_tx_cq(struct iser_comp *comp);
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static void iser_cq_event_callback(struct ib_event *cause, void *context)
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{
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@ -72,7 +72,6 @@ static void iser_event_handler(struct ib_event_handler *handler,
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*/
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static int iser_create_device_ib_res(struct iser_device *device)
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{
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struct iser_cq_desc *cq_desc;
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struct ib_device_attr *dev_attr = &device->dev_attr;
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int ret, i;
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@ -102,51 +101,44 @@ static int iser_create_device_ib_res(struct iser_device *device)
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return -1;
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}
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device->cqs_used = min(ISER_MAX_CQ, device->ib_device->num_comp_vectors);
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device->comps_used = min(ISER_MAX_CQ,
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device->ib_device->num_comp_vectors);
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iser_info("using %d CQs, device %s supports %d vectors\n",
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device->cqs_used, device->ib_device->name,
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device->comps_used, device->ib_device->name,
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device->ib_device->num_comp_vectors);
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device->cq_desc = kmalloc(sizeof(struct iser_cq_desc) * device->cqs_used,
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GFP_KERNEL);
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if (device->cq_desc == NULL)
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goto cq_desc_err;
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cq_desc = device->cq_desc;
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device->pd = ib_alloc_pd(device->ib_device);
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if (IS_ERR(device->pd))
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goto pd_err;
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for (i = 0; i < device->cqs_used; i++) {
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cq_desc[i].device = device;
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cq_desc[i].cq_index = i;
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for (i = 0; i < device->comps_used; i++) {
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struct iser_comp *comp = &device->comps[i];
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device->rx_cq[i] = ib_create_cq(device->ib_device,
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iser_cq_callback,
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iser_cq_event_callback,
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(void *)&cq_desc[i],
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ISER_MAX_RX_CQ_LEN, i);
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if (IS_ERR(device->rx_cq[i])) {
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device->rx_cq[i] = NULL;
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comp->device = device;
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comp->rx_cq = ib_create_cq(device->ib_device,
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iser_cq_callback,
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iser_cq_event_callback,
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(void *)comp,
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ISER_MAX_RX_CQ_LEN, i);
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if (IS_ERR(comp->rx_cq)) {
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comp->rx_cq = NULL;
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goto cq_err;
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}
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device->tx_cq[i] = ib_create_cq(device->ib_device,
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NULL, iser_cq_event_callback,
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(void *)&cq_desc[i],
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ISER_MAX_TX_CQ_LEN, i);
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if (IS_ERR(device->tx_cq[i])) {
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device->tx_cq[i] = NULL;
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comp->tx_cq = ib_create_cq(device->ib_device, NULL,
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iser_cq_event_callback,
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(void *)comp,
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ISER_MAX_TX_CQ_LEN, i);
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if (IS_ERR(comp->tx_cq)) {
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comp->tx_cq = NULL;
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goto cq_err;
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}
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if (ib_req_notify_cq(device->rx_cq[i], IB_CQ_NEXT_COMP))
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if (ib_req_notify_cq(comp->rx_cq, IB_CQ_NEXT_COMP))
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goto cq_err;
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tasklet_init(&device->cq_tasklet[i],
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iser_cq_tasklet_fn,
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(unsigned long)&cq_desc[i]);
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tasklet_init(&comp->tasklet, iser_cq_tasklet_fn,
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(unsigned long)comp);
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}
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device->mr = ib_get_dma_mr(device->pd, IB_ACCESS_LOCAL_WRITE |
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@ -165,19 +157,19 @@ static int iser_create_device_ib_res(struct iser_device *device)
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handler_err:
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ib_dereg_mr(device->mr);
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dma_mr_err:
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for (i = 0; i < device->cqs_used; i++)
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tasklet_kill(&device->cq_tasklet[i]);
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for (i = 0; i < device->comps_used; i++)
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tasklet_kill(&device->comps[i].tasklet);
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cq_err:
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for (i = 0; i < device->cqs_used; i++) {
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if (device->tx_cq[i])
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ib_destroy_cq(device->tx_cq[i]);
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if (device->rx_cq[i])
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ib_destroy_cq(device->rx_cq[i]);
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for (i = 0; i < device->comps_used; i++) {
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struct iser_comp *comp = &device->comps[i];
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if (comp->tx_cq)
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ib_destroy_cq(comp->tx_cq);
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if (comp->rx_cq)
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ib_destroy_cq(comp->rx_cq);
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}
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ib_dealloc_pd(device->pd);
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pd_err:
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kfree(device->cq_desc);
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cq_desc_err:
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iser_err("failed to allocate an IB resource\n");
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return -1;
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}
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@ -191,20 +183,20 @@ static void iser_free_device_ib_res(struct iser_device *device)
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int i;
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BUG_ON(device->mr == NULL);
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for (i = 0; i < device->cqs_used; i++) {
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tasklet_kill(&device->cq_tasklet[i]);
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(void)ib_destroy_cq(device->tx_cq[i]);
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(void)ib_destroy_cq(device->rx_cq[i]);
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device->tx_cq[i] = NULL;
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device->rx_cq[i] = NULL;
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for (i = 0; i < device->comps_used; i++) {
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struct iser_comp *comp = &device->comps[i];
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tasklet_kill(&comp->tasklet);
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ib_destroy_cq(comp->tx_cq);
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ib_destroy_cq(comp->rx_cq);
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comp->tx_cq = NULL;
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comp->rx_cq = NULL;
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}
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(void)ib_unregister_event_handler(&device->event_handler);
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(void)ib_dereg_mr(device->mr);
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(void)ib_dealloc_pd(device->pd);
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kfree(device->cq_desc);
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device->mr = NULL;
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device->pd = NULL;
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}
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@ -456,19 +448,20 @@ static int iser_create_ib_conn_res(struct ib_conn *ib_conn)
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mutex_lock(&ig.connlist_mutex);
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/* select the CQ with the minimal number of usages */
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for (index = 0; index < device->cqs_used; index++)
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if (device->cq_active_qps[index] <
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device->cq_active_qps[min_index])
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for (index = 0; index < device->comps_used; index++) {
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if (device->comps[index].active_qps <
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device->comps[min_index].active_qps)
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min_index = index;
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device->cq_active_qps[min_index]++;
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ib_conn->cq_index = min_index;
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}
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ib_conn->comp = &device->comps[min_index];
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ib_conn->comp->active_qps++;
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mutex_unlock(&ig.connlist_mutex);
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iser_info("cq index %d used for ib_conn %p\n", min_index, ib_conn);
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init_attr.event_handler = iser_qp_event_callback;
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init_attr.qp_context = (void *)ib_conn;
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init_attr.send_cq = device->tx_cq[min_index];
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init_attr.recv_cq = device->rx_cq[min_index];
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init_attr.send_cq = ib_conn->comp->tx_cq;
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init_attr.recv_cq = ib_conn->comp->rx_cq;
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init_attr.cap.max_recv_wr = ISER_QP_MAX_RECV_DTOS;
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init_attr.cap.max_send_sge = 2;
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init_attr.cap.max_recv_sge = 1;
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@ -604,7 +597,7 @@ static void iser_free_ib_conn_res(struct iser_conn *iser_conn,
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iser_free_rx_descriptors(iser_conn);
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if (ib_conn->qp != NULL) {
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ib_conn->device->cq_active_qps[ib_conn->cq_index]--;
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ib_conn->comp->active_qps--;
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rdma_destroy_qp(ib_conn->cma_id);
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ib_conn->qp = NULL;
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}
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@ -655,14 +648,13 @@ void iser_conn_release(struct iser_conn *iser_conn)
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*/
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static void iser_poll_for_flush_errors(struct ib_conn *ib_conn)
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{
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struct iser_device *device = ib_conn->device;
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int count = 0;
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while (ib_conn->post_recv_buf_count > 0 ||
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atomic_read(&ib_conn->post_send_buf_count) > 0) {
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msleep(100);
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if (atomic_read(&ib_conn->post_send_buf_count) > 0)
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iser_drain_tx_cq(device, ib_conn->cq_index);
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iser_drain_tx_cq(ib_conn->comp);
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count++;
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/* Don't flood with prints */
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@ -1189,9 +1181,9 @@ iser_handle_comp_error(struct iser_tx_desc *desc,
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kmem_cache_free(ig.desc_cache, desc);
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}
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static int iser_drain_tx_cq(struct iser_device *device, int cq_index)
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static int iser_drain_tx_cq(struct iser_comp *comp)
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{
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struct ib_cq *cq = device->tx_cq[cq_index];
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struct ib_cq *cq = comp->tx_cq;
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struct ib_wc wc;
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struct iser_tx_desc *tx_desc;
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struct ib_conn *ib_conn;
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@ -1222,20 +1214,18 @@ static int iser_drain_tx_cq(struct iser_device *device, int cq_index)
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static void iser_cq_tasklet_fn(unsigned long data)
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{
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struct iser_cq_desc *cq_desc = (struct iser_cq_desc *)data;
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struct iser_device *device = cq_desc->device;
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int cq_index = cq_desc->cq_index;
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struct ib_cq *cq = device->rx_cq[cq_index];
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struct ib_wc wc;
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struct iser_rx_desc *desc;
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unsigned long xfer_len;
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struct iser_comp *comp = (struct iser_comp *)data;
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struct ib_cq *cq = comp->rx_cq;
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struct ib_wc wc;
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struct iser_rx_desc *desc;
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unsigned long xfer_len;
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struct ib_conn *ib_conn;
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int completed_tx, completed_rx = 0;
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/* First do tx drain, so in a case where we have rx flushes and a successful
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* tx completion we will still go through completion error handling.
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*/
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completed_tx = iser_drain_tx_cq(device, cq_index);
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completed_tx = iser_drain_tx_cq(comp);
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while (ib_poll_cq(cq, 1, &wc) == 1) {
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desc = (struct iser_rx_desc *) (unsigned long) wc.wr_id;
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@ -1257,7 +1247,7 @@ static void iser_cq_tasklet_fn(unsigned long data)
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}
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completed_rx++;
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if (!(completed_rx & 63))
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completed_tx += iser_drain_tx_cq(device, cq_index);
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completed_tx += iser_drain_tx_cq(comp);
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}
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/* #warning "it is assumed here that arming CQ only once its empty" *
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* " would not cause interrupts to be missed" */
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@ -1268,11 +1258,9 @@ static void iser_cq_tasklet_fn(unsigned long data)
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static void iser_cq_callback(struct ib_cq *cq, void *cq_context)
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{
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struct iser_cq_desc *cq_desc = (struct iser_cq_desc *)cq_context;
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struct iser_device *device = cq_desc->device;
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int cq_index = cq_desc->cq_index;
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struct iser_comp *comp = cq_context;
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tasklet_schedule(&device->cq_tasklet[cq_index]);
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tasklet_schedule(&comp->tasklet);
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}
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u8 iser_check_task_pi_status(struct iscsi_iser_task *iser_task,
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