From 8a4d3444ebfacceb3e1bf4e449a42f9b6345596c Mon Sep 17 00:00:00 2001 From: Mike Marciniszyn Date: Sun, 14 Feb 2016 12:46:01 -0800 Subject: [PATCH] staging/rdma/hfi1: Determine actual operational VLs Use shared credits and dedicated credits for each VL to determine the actual number of operational VLs. Reviewed-by: Mike Marciniszyn Reviewed-by: Dennis Dalessandro Signed-off-by: Jubin John Signed-off-by: Doug Ledford --- drivers/staging/rdma/hfi1/chip.c | 37 +++++++++++++++++++++++++++++-------- drivers/staging/rdma/hfi1/diag.c | 2 +- drivers/staging/rdma/hfi1/hfi.h | 3 ++- 3 files changed, 32 insertions(+), 10 deletions(-) diff --git a/drivers/staging/rdma/hfi1/chip.c b/drivers/staging/rdma/hfi1/chip.c index 36e8e3e..b169e89 100644 --- a/drivers/staging/rdma/hfi1/chip.c +++ b/drivers/staging/rdma/hfi1/chip.c @@ -10305,12 +10305,6 @@ int hfi1_set_ib_cfg(struct hfi1_pportdata *ppd, int which, u32 val) ppd->vls_operational = val; if (!ppd->port) ret = -EINVAL; - else - ret = sdma_map_init( - ppd->dd, - ppd->port - 1, - val, - NULL); } break; /* @@ -10721,12 +10715,15 @@ static void wait_for_vl_status_clear(struct hfi1_devdata *dd, u64 mask, * raise = if the new limit is higher than the current value (may be changed * earlier in the algorithm), set the new limit to the new value */ -int set_buffer_control(struct hfi1_devdata *dd, struct buffer_control *new_bc) +int set_buffer_control(struct hfi1_pportdata *ppd, + struct buffer_control *new_bc) { + struct hfi1_devdata *dd = ppd->dd; u64 changing_mask, ld_mask, stat_mask; int change_count; int i, use_all_mask; int this_shared_changing; + int vl_count = 0, ret; /* * A0: add the variable any_shared_limit_changing below and in the * algorithm above. If removing A0 support, it can be removed. @@ -10878,6 +10875,28 @@ int set_buffer_control(struct hfi1_devdata *dd, struct buffer_control *new_bc) /* bracket the credit change with a total adjustment */ if (new_total < cur_total) set_global_limit(dd, new_total); + + /* + * Determine the actual number of operational VLS using the number of + * dedicated and shared credits for each VL. + */ + if (change_count > 0) { + for (i = 0; i < TXE_NUM_DATA_VL; i++) + if (be16_to_cpu(new_bc->vl[i].dedicated) > 0 || + be16_to_cpu(new_bc->vl[i].shared) > 0) + vl_count++; + ppd->actual_vls_operational = vl_count; + ret = sdma_map_init(dd, ppd->port - 1, vl_count ? + ppd->actual_vls_operational : + ppd->vls_operational, + NULL); + if (ret == 0) + ret = pio_map_init(dd, ppd->port - 1, vl_count ? + ppd->actual_vls_operational : + ppd->vls_operational, NULL); + if (ret) + return ret; + } return 0; } @@ -10969,7 +10988,7 @@ int fm_set_table(struct hfi1_pportdata *ppd, int which, void *t) VL_ARB_LOW_PRIO_TABLE_SIZE, t); break; case FM_TBL_BUFFER_CONTROL: - ret = set_buffer_control(ppd->dd, t); + ret = set_buffer_control(ppd, t); break; case FM_TBL_SC2VLNT: set_sc2vlnt(ppd->dd, t); @@ -13990,6 +14009,7 @@ struct hfi1_devdata *hfi1_init_dd(struct pci_dev *pdev, } ppd->vls_supported = num_vls; ppd->vls_operational = ppd->vls_supported; + ppd->actual_vls_operational = ppd->vls_supported; /* Set the default MTU. */ for (vl = 0; vl < num_vls; vl++) dd->vld[vl].mtu = hfi1_max_mtu; @@ -14074,6 +14094,7 @@ struct hfi1_devdata *hfi1_init_dd(struct pci_dev *pdev, num_vls, dd->chip_sdma_engines); num_vls = dd->chip_sdma_engines; ppd->vls_supported = dd->chip_sdma_engines; + ppd->vls_operational = ppd->vls_supported; } /* diff --git a/drivers/staging/rdma/hfi1/diag.c b/drivers/staging/rdma/hfi1/diag.c index 9523dc1..b8faee0 100644 --- a/drivers/staging/rdma/hfi1/diag.c +++ b/drivers/staging/rdma/hfi1/diag.c @@ -1017,7 +1017,7 @@ static long hfi1_assign_snoop_link_credits(struct hfi1_pportdata *ppd, t.vl[i].dedicated = be_per_vl_credits; t.vl[15].dedicated = cpu_to_be16(vl15_credits); - return set_buffer_control(ppd->dd, &t); + return set_buffer_control(ppd, &t); err_exit: snoop_dbg("port_state = 0x%x, total_credits = %d, vl15_credits = %d", diff --git a/drivers/staging/rdma/hfi1/hfi.h b/drivers/staging/rdma/hfi1/hfi.h index 4d5a18e..e8c4e56 100644 --- a/drivers/staging/rdma/hfi1/hfi.h +++ b/drivers/staging/rdma/hfi1/hfi.h @@ -644,6 +644,7 @@ struct hfi1_pportdata { u16 link_speed_active; u8 vls_supported; u8 vls_operational; + u8 actual_vls_operational; /* LID mask control */ u8 lmc; /* Rx Polarity inversion (compensate for ~tx on partner) */ @@ -1522,7 +1523,7 @@ int snoop_send_pio_handler(struct rvt_qp *qp, struct hfi1_pkt_state *ps, u64 pbc); void snoop_inline_pio_send(struct hfi1_devdata *dd, struct pio_buf *pbuf, u64 pbc, const void *from, size_t count); -int set_buffer_control(struct hfi1_devdata *dd, struct buffer_control *bc); +int set_buffer_control(struct hfi1_pportdata *ppd, struct buffer_control *bc); static inline struct hfi1_devdata *dd_from_ppd(struct hfi1_pportdata *ppd) { -- 2.7.4