From 8f3e9f3ea0871a988ec9540a4cde48a20c1cb98b Mon Sep 17 00:00:00 2001 From: "Wei Hu (Xavier)" Date: Wed, 23 Nov 2016 19:41:00 +0000 Subject: [PATCH] IB/hns: Add code for refreshing CQ CI using TPTR This patch added the code for refreshing CQ CI using TPTR in hip06 SoC. We will send a doorbell to hardware for refreshing CQ CI when user succeed to poll a cqe. But it will be failed if the doorbell has been blocked. So hardware will read a special buffer called TPTR to get the lastest CI value when the cq is almost full. This patch support the special CI buffer as follows: a) Alloc the memory for TPTR in the hns_roce_tptr_init function and free it in hns_roce_tptr_free function, these two functions will be called in probe function and in the remove function. b) Add the code for computing offset(every cq need 2 bytes) and write the dma addr to every cq context to notice hardware in the function named hns_roce_v1_write_cqc. c) Add code for mapping TPTR buffer to user space in function named hns_roce_mmap. The mapping distinguish TPTR and UAR of user mode by vm_pgoff(0: UAR, 1: TPTR, others:invaild) in hip06. d) Alloc the code for refreshing CQ CI using TPTR in the function named hns_roce_v1_poll_cq. e) Add some variable definitions to the related structure. Signed-off-by: Wei Hu (Xavier) Signed-off-by: Dongdong Huang(Donald) Signed-off-by: Lijun Ou Signed-off-by: Salil Mehta Signed-off-by: Doug Ledford --- drivers/infiniband/hw/hns/hns_roce_common.h | 2 - drivers/infiniband/hw/hns/hns_roce_cq.c | 9 +++ drivers/infiniband/hw/hns/hns_roce_device.h | 6 +- drivers/infiniband/hw/hns/hns_roce_hw_v1.c | 79 ++++++++++++++++++--- drivers/infiniband/hw/hns/hns_roce_hw_v1.h | 9 +++ drivers/infiniband/hw/hns/hns_roce_main.c | 13 +++- 6 files changed, 103 insertions(+), 15 deletions(-) diff --git a/drivers/infiniband/hw/hns/hns_roce_common.h b/drivers/infiniband/hw/hns/hns_roce_common.h index 297016103aa7..0dcb620e91dd 100644 --- a/drivers/infiniband/hw/hns/hns_roce_common.h +++ b/drivers/infiniband/hw/hns/hns_roce_common.h @@ -253,8 +253,6 @@ #define ROCEE_VENDOR_ID_REG 0x0 #define ROCEE_VENDOR_PART_ID_REG 0x4 -#define ROCEE_HW_VERSION_REG 0x8 - #define ROCEE_SYS_IMAGE_GUID_L_REG 0xC #define ROCEE_SYS_IMAGE_GUID_H_REG 0x10 diff --git a/drivers/infiniband/hw/hns/hns_roce_cq.c b/drivers/infiniband/hw/hns/hns_roce_cq.c index 097365932b09..5dc8d92e79fd 100644 --- a/drivers/infiniband/hw/hns/hns_roce_cq.c +++ b/drivers/infiniband/hw/hns/hns_roce_cq.c @@ -349,6 +349,15 @@ struct ib_cq *hns_roce_ib_create_cq(struct ib_device *ib_dev, goto err_mtt; } + /* + * For the QP created by kernel space, tptr value should be initialized + * to zero; For the QP created by user space, it will cause synchronous + * problems if tptr is set to zero here, so we initialze it in user + * space. + */ + if (!context) + *hr_cq->tptr_addr = 0; + /* Get created cq handler and carry out event */ hr_cq->comp = hns_roce_ib_cq_comp; hr_cq->event = hns_roce_ib_cq_event; diff --git a/drivers/infiniband/hw/hns/hns_roce_device.h b/drivers/infiniband/hw/hns/hns_roce_device.h index 341731553a60..7242b1438873 100644 --- a/drivers/infiniband/hw/hns/hns_roce_device.h +++ b/drivers/infiniband/hw/hns/hns_roce_device.h @@ -37,6 +37,8 @@ #define DRV_NAME "hns_roce" +#define HNS_ROCE_HW_VER1 ('h' << 24 | 'i' << 16 | '0' << 8 | '6') + #define MAC_ADDR_OCTET_NUM 6 #define HNS_ROCE_MAX_MSG_LEN 0x80000000 @@ -296,7 +298,7 @@ struct hns_roce_cq { u32 cq_depth; u32 cons_index; void __iomem *cq_db_l; - void __iomem *tptr_addr; + u16 *tptr_addr; unsigned long cqn; u32 vector; atomic_t refcount; @@ -553,6 +555,8 @@ struct hns_roce_dev { int cmd_mod; int loop_idc; + dma_addr_t tptr_dma_addr; /*only for hw v1*/ + u32 tptr_size; /*only for hw v1*/ struct hns_roce_hw *hw; }; diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v1.c b/drivers/infiniband/hw/hns/hns_roce_hw_v1.c index 7f2c26bd6232..957f0de866cd 100644 --- a/drivers/infiniband/hw/hns/hns_roce_hw_v1.c +++ b/drivers/infiniband/hw/hns/hns_roce_hw_v1.c @@ -849,6 +849,45 @@ static void hns_roce_bt_free(struct hns_roce_dev *hr_dev) priv->bt_table.qpc_buf.buf, priv->bt_table.qpc_buf.map); } +static int hns_roce_tptr_init(struct hns_roce_dev *hr_dev) +{ + struct device *dev = &hr_dev->pdev->dev; + struct hns_roce_buf_list *tptr_buf; + struct hns_roce_v1_priv *priv; + + priv = (struct hns_roce_v1_priv *)hr_dev->hw->priv; + tptr_buf = &priv->tptr_table.tptr_buf; + + /* + * This buffer will be used for CQ's tptr(tail pointer), also + * named ci(customer index). Every CQ will use 2 bytes to save + * cqe ci in hip06. Hardware will read this area to get new ci + * when the queue is almost full. + */ + tptr_buf->buf = dma_alloc_coherent(dev, HNS_ROCE_V1_TPTR_BUF_SIZE, + &tptr_buf->map, GFP_KERNEL); + if (!tptr_buf->buf) + return -ENOMEM; + + hr_dev->tptr_dma_addr = tptr_buf->map; + hr_dev->tptr_size = HNS_ROCE_V1_TPTR_BUF_SIZE; + + return 0; +} + +static void hns_roce_tptr_free(struct hns_roce_dev *hr_dev) +{ + struct device *dev = &hr_dev->pdev->dev; + struct hns_roce_buf_list *tptr_buf; + struct hns_roce_v1_priv *priv; + + priv = (struct hns_roce_v1_priv *)hr_dev->hw->priv; + tptr_buf = &priv->tptr_table.tptr_buf; + + dma_free_coherent(dev, HNS_ROCE_V1_TPTR_BUF_SIZE, + tptr_buf->buf, tptr_buf->map); +} + /** * hns_roce_v1_reset - reset RoCE * @hr_dev: RoCE device struct pointer @@ -906,12 +945,11 @@ void hns_roce_v1_profile(struct hns_roce_dev *hr_dev) hr_dev->vendor_id = le32_to_cpu(roce_read(hr_dev, ROCEE_VENDOR_ID_REG)); hr_dev->vendor_part_id = le32_to_cpu(roce_read(hr_dev, ROCEE_VENDOR_PART_ID_REG)); - hr_dev->hw_rev = le32_to_cpu(roce_read(hr_dev, ROCEE_HW_VERSION_REG)); - hr_dev->sys_image_guid = le32_to_cpu(roce_read(hr_dev, ROCEE_SYS_IMAGE_GUID_L_REG)) | ((u64)le32_to_cpu(roce_read(hr_dev, ROCEE_SYS_IMAGE_GUID_H_REG)) << 32); + hr_dev->hw_rev = HNS_ROCE_HW_VER1; caps->num_qps = HNS_ROCE_V1_MAX_QP_NUM; caps->max_wqes = HNS_ROCE_V1_MAX_WQE_NUM; @@ -1009,8 +1047,17 @@ int hns_roce_v1_init(struct hns_roce_dev *hr_dev) goto error_failed_bt_init; } + ret = hns_roce_tptr_init(hr_dev); + if (ret) { + dev_err(dev, "tptr init failed!\n"); + goto error_failed_tptr_init; + } + return 0; +error_failed_tptr_init: + hns_roce_bt_free(hr_dev); + error_failed_bt_init: hns_roce_port_enable(hr_dev, HNS_ROCE_PORT_DOWN); hns_roce_raq_free(hr_dev); @@ -1022,6 +1069,7 @@ error_failed_raq_init: void hns_roce_v1_exit(struct hns_roce_dev *hr_dev) { + hns_roce_tptr_free(hr_dev); hns_roce_bt_free(hr_dev); hns_roce_port_enable(hr_dev, HNS_ROCE_PORT_DOWN); hns_roce_raq_free(hr_dev); @@ -1339,14 +1387,21 @@ void hns_roce_v1_write_cqc(struct hns_roce_dev *hr_dev, dma_addr_t dma_handle, int nent, u32 vector) { struct hns_roce_cq_context *cq_context = NULL; - void __iomem *tptr_addr; + struct hns_roce_buf_list *tptr_buf; + struct hns_roce_v1_priv *priv; + dma_addr_t tptr_dma_addr; + int offset; + + priv = (struct hns_roce_v1_priv *)hr_dev->hw->priv; + tptr_buf = &priv->tptr_table.tptr_buf; cq_context = mb_buf; memset(cq_context, 0, sizeof(*cq_context)); - tptr_addr = 0; - hr_dev->priv_addr = tptr_addr; - hr_cq->tptr_addr = tptr_addr; + /* Get the tptr for this CQ. */ + offset = hr_cq->cqn * HNS_ROCE_V1_TPTR_ENTRY_SIZE; + tptr_dma_addr = tptr_buf->map + offset; + hr_cq->tptr_addr = (u16 *)(tptr_buf->buf + offset); /* Register cq_context members */ roce_set_field(cq_context->cqc_byte_4, @@ -1390,10 +1445,10 @@ void hns_roce_v1_write_cqc(struct hns_roce_dev *hr_dev, roce_set_field(cq_context->cqc_byte_20, CQ_CONTEXT_CQC_BYTE_20_CQE_TPTR_ADDR_H_M, CQ_CONTEXT_CQC_BYTE_20_CQE_TPTR_ADDR_H_S, - (u64)tptr_addr >> 44); + tptr_dma_addr >> 44); cq_context->cqc_byte_20 = cpu_to_le32(cq_context->cqc_byte_20); - cq_context->cqe_tptr_addr_l = (u32)((u64)tptr_addr >> 12); + cq_context->cqe_tptr_addr_l = (u32)(tptr_dma_addr >> 12); roce_set_field(cq_context->cqc_byte_32, CQ_CONTEXT_CQC_BYTE_32_CUR_CQE_BA1_H_M, @@ -1659,8 +1714,14 @@ int hns_roce_v1_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc) break; } - if (npolled) + if (npolled) { + *hr_cq->tptr_addr = hr_cq->cons_index & + ((hr_cq->cq_depth << 1) - 1); + + /* Memroy barrier */ + wmb(); hns_roce_v1_cq_set_ci(hr_cq, hr_cq->cons_index); + } spin_unlock_irqrestore(&hr_cq->lock, flags); diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v1.h b/drivers/infiniband/hw/hns/hns_roce_hw_v1.h index 2e1878bf4836..6004c7f39542 100644 --- a/drivers/infiniband/hw/hns/hns_roce_hw_v1.h +++ b/drivers/infiniband/hw/hns/hns_roce_hw_v1.h @@ -104,6 +104,10 @@ #define HNS_ROCE_BT_RSV_BUF_SIZE (1 << 17) +#define HNS_ROCE_V1_TPTR_ENTRY_SIZE 2 +#define HNS_ROCE_V1_TPTR_BUF_SIZE \ + (HNS_ROCE_V1_TPTR_ENTRY_SIZE * HNS_ROCE_V1_MAX_CQ_NUM) + #define HNS_ROCE_ODB_POLL_MODE 0 #define HNS_ROCE_SDB_NORMAL_MODE 0 @@ -983,10 +987,15 @@ struct hns_roce_bt_table { struct hns_roce_buf_list cqc_buf; }; +struct hns_roce_tptr_table { + struct hns_roce_buf_list tptr_buf; +}; + struct hns_roce_v1_priv { struct hns_roce_db_table db_table; struct hns_roce_raq_table raq_table; struct hns_roce_bt_table bt_table; + struct hns_roce_tptr_table tptr_table; }; int hns_dsaf_roce_reset(struct fwnode_handle *dsaf_fwnode, bool dereset); diff --git a/drivers/infiniband/hw/hns/hns_roce_main.c b/drivers/infiniband/hw/hns/hns_roce_main.c index 764e35a54457..67701719bad1 100644 --- a/drivers/infiniband/hw/hns/hns_roce_main.c +++ b/drivers/infiniband/hw/hns/hns_roce_main.c @@ -549,6 +549,8 @@ static int hns_roce_dealloc_ucontext(struct ib_ucontext *ibcontext) static int hns_roce_mmap(struct ib_ucontext *context, struct vm_area_struct *vma) { + struct hns_roce_dev *hr_dev = to_hr_dev(context->device); + if (((vma->vm_end - vma->vm_start) % PAGE_SIZE) != 0) return -EINVAL; @@ -558,10 +560,15 @@ static int hns_roce_mmap(struct ib_ucontext *context, to_hr_ucontext(context)->uar.pfn, PAGE_SIZE, vma->vm_page_prot)) return -EAGAIN; - - } else { + } else if (vma->vm_pgoff == 1 && hr_dev->hw_rev == HNS_ROCE_HW_VER1) { + /* vm_pgoff: 1 -- TPTR */ + if (io_remap_pfn_range(vma, vma->vm_start, + hr_dev->tptr_dma_addr >> PAGE_SHIFT, + hr_dev->tptr_size, + vma->vm_page_prot)) + return -EAGAIN; + } else return -EINVAL; - } return 0; } -- 2.39.5