[PATCH net-next 6/7] qed: Add support for memory registeration verbs

Yuval Mintz
2016-10-01T19:00:00Z

From: Ram Amrani <Ram.Amrani@caviumnetworks.com>

Add slowpath configuration support for user, dma and memory
regions registration.

Signed-off-by: Ram Amrani <Ram.Amrani@caviumnetworks.com>
Signed-off-by: Yuval Mintz <Yuval.Mintz@caviumnetworks.com>
---
drivers/net/ethernet/qlogic/qed/qed_roce.c | 240 +++++++++++++++++++++++++++++
include/linux/qed/qed_roce_if.h | 6 +
2 files changed, 246 insertions(+)

diff --git a/drivers/net/ethernet/qlogic/qed/qed_roce.c b/drivers/net/ethernet/qlogic/qed/qed_roce.c
index 438a0ba..8b4854d 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_roce.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_roce.c
@@ -689,6 +689,17 @@ struct qed_rdma_device *qed_rdma_query_device(void *rdma_cxt)
return p_hwfn->p_rdma_info->dev;
}

+void qed_rdma_free_tid(void *rdma_cxt, u32 itid)
+{
+ struct qed_hwfn *p_hwfn = (struct qed_hwfn *)rdma_cxt;
+
+ DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "itid = %08x\n", itid);
+
+ spin_lock_bh(&p_hwfn->p_rdma_info->lock);
+ qed_bmap_release_id(p_hwfn, &p_hwfn->p_rdma_info->tid_map, itid);
+ spin_unlock_bh(&p_hwfn->p_rdma_info->lock);
+}
+
int qed_rdma_alloc_tid(void *rdma_cxt, u32 *itid)
{
struct qed_hwfn *p_hwfn = (struct qed_hwfn *)rdma_cxt;
@@ -2300,6 +2311,231 @@ int qed_rdma_modify_qp(void *rdma_cxt,
return rc;
}

+int qed_rdma_register_tid(void *rdma_cxt,
+ struct qed_rdma_register_tid_in_params *params)
+{
+ struct qed_hwfn *p_hwfn = (struct qed_hwfn *)rdma_cxt;
+ struct rdma_register_tid_ramrod_data *p_ramrod;
+ struct qed_sp_init_data init_data;
+ struct qed_spq_entry *p_ent;
+ enum rdma_tid_type tid_type;
+ u8 fw_return_code;
+ int rc;
+
+ DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "itid = %08x\n", params->itid);
+
+ /* Get SPQ entry */
+ memset(&init_data, 0, sizeof(init_data));
+ init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
+ init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
+
+ rc = qed_sp_init_request(p_hwfn, &p_ent, RDMA_RAMROD_REGISTER_MR,
+ p_hwfn->p_rdma_info->proto, &init_data);
+ if (rc) {
+ DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "rc = %d\n", rc);
+ return rc;
+ }
+
+ if (p_hwfn->p_rdma_info->last_tid < params->itid)
+ p_hwfn->p_rdma_info->last_tid = params->itid;
+
+ p_ramrod = &p_ent->ramrod.rdma_register_tid;
+
+ p_ramrod->flags = 0;
+ SET_FIELD(p_ramrod->flags,
+ RDMA_REGISTER_TID_RAMROD_DATA_TWO_LEVEL_PBL,
+ params->pbl_two_level);
+
+ SET_FIELD(p_ramrod->flags,
+ RDMA_REGISTER_TID_RAMROD_DATA_ZERO_BASED, params->zbva);
+
+ SET_FIELD(p_ramrod->flags,
+ RDMA_REGISTER_TID_RAMROD_DATA_PHY_MR, params->phy_mr);
+
+ /* Don't initialize D/C field, as it may override other bits. */
+ if (!(params->tid_type == QED_RDMA_TID_FMR) && !(params->dma_mr))
+ SET_FIELD(p_ramrod->flags,
+ RDMA_REGISTER_TID_RAMROD_DATA_PAGE_SIZE_LOG,
+ params->page_size_log - 12);
+
+ SET_FIELD(p_ramrod->flags,
+ RDMA_REGISTER_TID_RAMROD_DATA_MAX_ID,
+ p_hwfn->p_rdma_info->last_tid);
+
+ SET_FIELD(p_ramrod->flags,
+ RDMA_REGISTER_TID_RAMROD_DATA_REMOTE_READ,
+ params->remote_read);
+
+ SET_FIELD(p_ramrod->flags,
+ RDMA_REGISTER_TID_RAMROD_DATA_REMOTE_WRITE,
+ params->remote_write);
+
+ SET_FIELD(p_ramrod->flags,
+ RDMA_REGISTER_TID_RAMROD_DATA_REMOTE_ATOMIC,
+ params->remote_atomic);
+
+ SET_FIELD(p_ramrod->flags,
+ RDMA_REGISTER_TID_RAMROD_DATA_LOCAL_WRITE,
+ params->local_write);
+
+ SET_FIELD(p_ramrod->flags,
+ RDMA_REGISTER_TID_RAMROD_DATA_LOCAL_READ, params->local_read);
+
+ SET_FIELD(p_ramrod->flags,
+ RDMA_REGISTER_TID_RAMROD_DATA_ENABLE_MW_BIND,
+ params->mw_bind);
+
+ SET_FIELD(p_ramrod->flags1,
+ RDMA_REGISTER_TID_RAMROD_DATA_PBL_PAGE_SIZE_LOG,
+ params->pbl_page_size_log - 12);
+
+ SET_FIELD(p_ramrod->flags2,
+ RDMA_REGISTER_TID_RAMROD_DATA_DMA_MR, params->dma_mr);
+
+ switch (params->tid_type) {
+ case QED_RDMA_TID_REGISTERED_MR:
+ tid_type = RDMA_TID_REGISTERED_MR;
+ break;
+ case QED_RDMA_TID_FMR:
+ tid_type = RDMA_TID_FMR;
+ break;
+ case QED_RDMA_TID_MW_TYPE1:
+ tid_type = RDMA_TID_MW_TYPE1;
+ break;
+ case QED_RDMA_TID_MW_TYPE2A:
+ tid_type = RDMA_TID_MW_TYPE2A;
+ break;
+ default:
+ rc = -EINVAL;
+ DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "rc = %d\n", rc);
+ return rc;
+ }
+ SET_FIELD(p_ramrod->flags1,
+ RDMA_REGISTER_TID_RAMROD_DATA_TID_TYPE, tid_type);
+
+ p_ramrod->itid = cpu_to_le32(params->itid);
+ p_ramrod->key = params->key;
+ p_ramrod->pd = cpu_to_le16(params->pd);
+ p_ramrod->length_hi = (u8)(params->length >> 32);
+ p_ramrod->length_lo = DMA_LO_LE(params->length);
+ if (params->zbva) {
+ /* Lower 32 bits of the registered MR address.
+ * In case of zero based MR, will hold FBO
+ */
+ p_ramrod->va.hi = 0;
+ p_ramrod->va.lo = cpu_to_le32(params->fbo);
+ } else {
+ DMA_REGPAIR_LE(p_ramrod->va, params->vaddr);
+ }
+ DMA_REGPAIR_LE(p_ramrod->pbl_base, params->pbl_ptr);
+
+ /* DIF */
+ if (params->dif_enabled) {
+ SET_FIELD(p_ramrod->flags2,
+ RDMA_REGISTER_TID_RAMROD_DATA_DIF_ON_HOST_FLG, 1);
+ DMA_REGPAIR_LE(p_ramrod->dif_error_addr,
+ params->dif_error_addr);
+ DMA_REGPAIR_LE(p_ramrod->dif_runt_addr, params->dif_runt_addr);
+ }
+
+ rc = qed_spq_post(p_hwfn, p_ent, &fw_return_code);
+
+ if (fw_return_code != RDMA_RETURN_OK) {
+ DP_NOTICE(p_hwfn, "fw_return_code = %d\n", fw_return_code);
+ return -EINVAL;
+ }
+
+ DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "Register TID, rc = %d\n", rc);
+ return rc;
+}
+
+int qed_rdma_deregister_tid(void *rdma_cxt, u32 itid)
+{
+ struct qed_hwfn *p_hwfn = (struct qed_hwfn *)rdma_cxt;
+ struct rdma_deregister_tid_ramrod_data *p_ramrod;
+ struct qed_sp_init_data init_data;
+ struct qed_spq_entry *p_ent;
+ struct qed_ptt *p_ptt;
+ u8 fw_return_code;
+ int rc;
+
+ DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "itid = %08x\n", itid);
+
+ /* Get SPQ entry */
+ memset(&init_data, 0, sizeof(init_data));
+ init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
+ init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
+
+ rc = qed_sp_init_request(p_hwfn, &p_ent, RDMA_RAMROD_DEREGISTER_MR,
+ p_hwfn->p_rdma_info->proto, &init_data);
+ if (rc) {
+ DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "rc = %d\n", rc);
+ return rc;
+ }
+
+ p_ramrod = &p_ent->ramrod.rdma_deregister_tid;
+ p_ramrod->itid = cpu_to_le32(itid);
+
+ rc = qed_spq_post(p_hwfn, p_ent, &fw_return_code);
+ if (rc) {
+ DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "rc = %d\n", rc);
+ return rc;
+ }
+
+ if (fw_return_code == RDMA_RETURN_DEREGISTER_MR_BAD_STATE_ERR) {
+ DP_NOTICE(p_hwfn, "fw_return_code = %d\n", fw_return_code);
+ return -EINVAL;
+ } else if (fw_return_code == RDMA_RETURN_NIG_DRAIN_REQ) {
+ /* Bit indicating that the TID is in use and a nig drain is
+ * required before sending the ramrod again
+ */
+ p_ptt = qed_ptt_acquire(p_hwfn);
+ if (!p_ptt) {
+ rc = -EBUSY;
+ DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
+ "Failed to acquire PTT\n");
+ return rc;
+ }
+
+ rc = qed_mcp_drain(p_hwfn, p_ptt);
+ if (rc) {
+ qed_ptt_release(p_hwfn, p_ptt);
+ DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
+ "Drain failed\n");
+ return rc;
+ }
+
+ qed_ptt_release(p_hwfn, p_ptt);
+
+ /* Resend the ramrod */
+ rc = qed_sp_init_request(p_hwfn, &p_ent,
+ RDMA_RAMROD_DEREGISTER_MR,
+ p_hwfn->p_rdma_info->proto,
+ &init_data);
+ if (rc) {
+ DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
+ "Failed to init sp-element\n");
+ return rc;
+ }
+
+ rc = qed_spq_post(p_hwfn, p_ent, &fw_return_code);
+ if (rc) {
+ DP_VERBOSE(p_hwfn, QED_MSG_RDMA,
+ "Ramrod failed\n");
+ return rc;
+ }
+
+ if (fw_return_code != RDMA_RETURN_OK) {
+ DP_NOTICE(p_hwfn, "fw_return_code = %d\n",
+ fw_return_code);
+ return rc;
+ }
+ }
+
+ DP_VERBOSE(p_hwfn, QED_MSG_RDMA, "De-registered TID, rc = %d\n", rc);
+ return rc;
+}
+
static void *qed_rdma_get_rdma_ctx(struct qed_dev *cdev)
{
return QED_LEADING_HWFN(cdev);
@@ -2398,6 +2634,10 @@ static const struct qed_rdma_ops qed_rdma_ops_pass = {
.rdma_modify_qp = &qed_rdma_modify_qp,
.rdma_query_qp = &qed_rdma_query_qp,
.rdma_destroy_qp = &qed_rdma_destroy_qp,
+ .rdma_alloc_tid = &qed_rdma_alloc_tid,
+ .rdma_free_tid = &qed_rdma_free_tid,
+ .rdma_register_tid = &qed_rdma_register_tid,
+ .rdma_deregister_tid = &qed_rdma_deregister_tid,
};

const struct qed_rdma_ops *qed_get_rdma_ops()
diff --git a/include/linux/qed/qed_roce_if.h b/include/linux/qed/qed_roce_if.h
index 02321e3..0b6df6e 100644
--- a/include/linux/qed/qed_roce_if.h
+++ b/include/linux/qed/qed_roce_if.h
@@ -512,6 +512,12 @@ struct qed_rdma_ops {
int (*rdma_query_qp)(void *rdma_cxt, struct qed_rdma_qp *qp,
struct qed_rdma_query_qp_out_params *oparams);
int (*rdma_destroy_qp)(void *rdma_cxt, struct qed_rdma_qp *qp);
+ int
+ (*rdma_register_tid)(void *rdma_cxt,
+ struct qed_rdma_register_tid_in_params *iparams);
+ int (*rdma_deregister_tid)(void *rdma_cxt, u32 itid);
+ int (*rdma_alloc_tid)(void *rdma_cxt, u32 *itid);
+ void (*rdma_free_tid)(void *rdma_cxt, u32 itid);
};

const struct qed_rdma_ops *qed_get_rdma_ops(void);
--
1.9.3