From 09b6b14749523e3660b72be2ed91b3c0b852f58f Mon Sep 17 00:00:00 2001 From: "Mintz, Yuval" Date: Thu, 1 Jun 2017 15:29:08 +0300 Subject: [PATCH] qed: Provide auxiliary for getting free VF SB IOV code is very intrusive in its manipulation of the status block database. Add a new auxiliary function to allow the PF to find an available unused status block to configure for a specific VF's MSI-x vector. Signed-off-by: Yuval Mintz Signed-off-by: David S. Miller --- drivers/net/ethernet/qlogic/qed/qed_int.c | 20 ++++++++++++ drivers/net/ethernet/qlogic/qed/qed_int.h | 11 +++++++ drivers/net/ethernet/qlogic/qed/qed_sriov.c | 49 ++++++++++++----------------- 3 files changed, 51 insertions(+), 29 deletions(-) diff --git a/drivers/net/ethernet/qlogic/qed/qed_int.c b/drivers/net/ethernet/qlogic/qed/qed_int.c index a49484a..96eee1e 100644 --- a/drivers/net/ethernet/qlogic/qed/qed_int.c +++ b/drivers/net/ethernet/qlogic/qed/qed_int.c @@ -1412,6 +1412,26 @@ void qed_int_sb_setup(struct qed_hwfn *p_hwfn, sb_info->igu_sb_id, 0, 0); } +struct qed_igu_block *qed_get_igu_free_sb(struct qed_hwfn *p_hwfn, bool b_is_pf) +{ + struct qed_igu_block *p_block; + u16 igu_id; + + for (igu_id = 0; igu_id < QED_MAPPING_MEMORY_SIZE(p_hwfn->cdev); + igu_id++) { + p_block = &p_hwfn->hw_info.p_igu_info->entry[igu_id]; + + if (!(p_block->status & QED_IGU_STATUS_VALID) || + !(p_block->status & QED_IGU_STATUS_FREE)) + continue; + + if (!!(p_block->status & QED_IGU_STATUS_PF) == b_is_pf) + return p_block; + } + + return NULL; +} + static u16 qed_get_pf_igu_sb_id(struct qed_hwfn *p_hwfn, u16 vector_id) { struct qed_igu_block *p_block; diff --git a/drivers/net/ethernet/qlogic/qed/qed_int.h b/drivers/net/ethernet/qlogic/qed/qed_int.h index b55334f..273e73a1 100644 --- a/drivers/net/ethernet/qlogic/qed/qed_int.h +++ b/drivers/net/ethernet/qlogic/qed/qed_int.h @@ -225,6 +225,17 @@ struct qed_igu_info { }; /* TODO Names of function may change... */ +/** + * @brief return a pointer to an unused valid SB + * + * @param p_hwfn + * @param b_is_pf - true iff we want a SB belonging to a PF + * + * @return point to an igu_block, NULL if none is available + */ +struct qed_igu_block *qed_get_igu_free_sb(struct qed_hwfn *p_hwfn, + bool b_is_pf); + void qed_int_igu_init_pure_rt(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt, bool b_set, diff --git a/drivers/net/ethernet/qlogic/qed/qed_sriov.c b/drivers/net/ethernet/qlogic/qed/qed_sriov.c index 62b207a..cb9123b 100644 --- a/drivers/net/ethernet/qlogic/qed/qed_sriov.c +++ b/drivers/net/ethernet/qlogic/qed/qed_sriov.c @@ -868,12 +868,11 @@ static u8 qed_iov_alloc_vf_igu_sbs(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt, struct qed_vf_info *vf, u16 num_rx_queues) { - struct qed_igu_block *igu_blocks; - int qid = 0, igu_id = 0; + struct qed_igu_block *p_block; + struct cau_sb_entry sb_entry; + int qid = 0; u32 val = 0; - igu_blocks = p_hwfn->hw_info.p_igu_info->entry; - if (num_rx_queues > p_hwfn->hw_info.p_igu_info->usage.free_cnt_iov) num_rx_queues = p_hwfn->hw_info.p_igu_info->usage.free_cnt_iov; p_hwfn->hw_info.p_igu_info->usage.free_cnt_iov -= num_rx_queues; @@ -882,31 +881,23 @@ static u8 qed_iov_alloc_vf_igu_sbs(struct qed_hwfn *p_hwfn, SET_FIELD(val, IGU_MAPPING_LINE_VALID, 1); SET_FIELD(val, IGU_MAPPING_LINE_PF_VALID, 0); - while ((qid < num_rx_queues) && - (igu_id < QED_MAPPING_MEMORY_SIZE(p_hwfn->cdev))) { - if (igu_blocks[igu_id].status & QED_IGU_STATUS_FREE) { - struct cau_sb_entry sb_entry; - - vf->igu_sbs[qid] = (u16)igu_id; - igu_blocks[igu_id].status &= ~QED_IGU_STATUS_FREE; - - SET_FIELD(val, IGU_MAPPING_LINE_VECTOR_NUMBER, qid); - - qed_wr(p_hwfn, p_ptt, - IGU_REG_MAPPING_MEMORY + sizeof(u32) * igu_id, - val); - - /* Configure igu sb in CAU which were marked valid */ - qed_init_cau_sb_entry(p_hwfn, &sb_entry, - p_hwfn->rel_pf_id, - vf->abs_vf_id, 1); - qed_dmae_host2grc(p_hwfn, p_ptt, - (u64)(uintptr_t)&sb_entry, - CAU_REG_SB_VAR_MEMORY + - igu_id * sizeof(u64), 2, 0); - qid++; - } - igu_id++; + for (qid = 0; qid < num_rx_queues; qid++) { + p_block = qed_get_igu_free_sb(p_hwfn, false); + vf->igu_sbs[qid] = p_block->igu_sb_id; + p_block->status &= ~QED_IGU_STATUS_FREE; + SET_FIELD(val, IGU_MAPPING_LINE_VECTOR_NUMBER, qid); + + qed_wr(p_hwfn, p_ptt, + IGU_REG_MAPPING_MEMORY + + sizeof(u32) * p_block->igu_sb_id, val); + + /* Configure igu sb in CAU which were marked valid */ + qed_init_cau_sb_entry(p_hwfn, &sb_entry, + p_hwfn->rel_pf_id, vf->abs_vf_id, 1); + qed_dmae_host2grc(p_hwfn, p_ptt, + (u64)(uintptr_t)&sb_entry, + CAU_REG_SB_VAR_MEMORY + + p_block->igu_sb_id * sizeof(u64), 2, 0); } vf->num_sbs = (u8) num_rx_queues; -- 2.7.4