diff options
| -rw-r--r-- | drivers/staging/rdma/hfi1/chip.c | 18 | ||||
| -rw-r--r-- | drivers/staging/rdma/hfi1/hfi.h | 4 | ||||
| -rw-r--r-- | drivers/staging/rdma/hfi1/init.c | 28 |
3 files changed, 47 insertions, 3 deletions
diff --git a/drivers/staging/rdma/hfi1/chip.c b/drivers/staging/rdma/hfi1/chip.c index 0b07b364f666..456704e9629a 100644 --- a/drivers/staging/rdma/hfi1/chip.c +++ b/drivers/staging/rdma/hfi1/chip.c @@ -7785,6 +7785,17 @@ void hfi1_rcvctrl(struct hfi1_devdata *dd, unsigned int op, int ctxt) } if (op & HFI1_RCVCTRL_CTXT_DIS) { write_csr(dd, RCV_VL15, 0); + /* + * When receive context is being disabled turn on tail + * update with a dummy tail address and then disable + * receive context. + */ + if (dd->rcvhdrtail_dummy_physaddr) { + write_kctxt_csr(dd, ctxt, RCV_HDR_TAIL_ADDR, + dd->rcvhdrtail_dummy_physaddr); + rcvctrl |= RCV_CTXT_CTRL_TAIL_UPD_SMASK; + } + rcvctrl &= ~RCV_CTXT_CTRL_ENABLE_SMASK; } if (op & HFI1_RCVCTRL_INTRAVAIL_ENB) @@ -7854,10 +7865,11 @@ void hfi1_rcvctrl(struct hfi1_devdata *dd, unsigned int op, int ctxt) if (op & (HFI1_RCVCTRL_TAILUPD_DIS | HFI1_RCVCTRL_CTXT_DIS)) /* * If the context has been disabled and the Tail Update has - * been cleared, clear the RCV_HDR_TAIL_ADDR CSR so - * it doesn't contain an address that is invalid. + * been cleared, set the RCV_HDR_TAIL_ADDR CSR to dummy address + * so it doesn't contain an address that is invalid. */ - write_kctxt_csr(dd, ctxt, RCV_HDR_TAIL_ADDR, 0); + write_kctxt_csr(dd, ctxt, RCV_HDR_TAIL_ADDR, + dd->rcvhdrtail_dummy_physaddr); } u32 hfi1_read_cntrs(struct hfi1_devdata *dd, loff_t pos, char **namep, diff --git a/drivers/staging/rdma/hfi1/hfi.h b/drivers/staging/rdma/hfi1/hfi.h index 70891fbf89b0..1fd12411463c 100644 --- a/drivers/staging/rdma/hfi1/hfi.h +++ b/drivers/staging/rdma/hfi1/hfi.h @@ -1071,6 +1071,10 @@ struct hfi1_devdata { /* Save the enabled LCB error bits */ u64 lcb_err_en; u8 dc_shutdown; + + /* receive context tail dummy address */ + __le64 *rcvhdrtail_dummy_kvaddr; + dma_addr_t rcvhdrtail_dummy_physaddr; }; /* 8051 firmware version helper */ diff --git a/drivers/staging/rdma/hfi1/init.c b/drivers/staging/rdma/hfi1/init.c index 635996742480..c17cef6938fb 100644 --- a/drivers/staging/rdma/hfi1/init.c +++ b/drivers/staging/rdma/hfi1/init.c @@ -692,6 +692,18 @@ int hfi1_init(struct hfi1_devdata *dd, int reinit) if (ret) goto done; + /* allocate dummy tail memory for all receive contexts */ + dd->rcvhdrtail_dummy_kvaddr = dma_zalloc_coherent( + &dd->pcidev->dev, sizeof(u64), + &dd->rcvhdrtail_dummy_physaddr, + GFP_KERNEL); + + if (!dd->rcvhdrtail_dummy_kvaddr) { + dd_dev_err(dd, "cannot allocate dummy tail memory\n"); + ret = -ENOMEM; + goto done; + } + /* dd->rcd can be NULL if early initialization failed */ for (i = 0; dd->rcd && i < dd->first_user_ctxt; ++i) { /* @@ -1267,6 +1279,14 @@ static void cleanup_device_data(struct hfi1_devdata *dd) tmp = dd->rcd; dd->rcd = NULL; spin_unlock_irqrestore(&dd->uctxt_lock, flags); + + if (dd->rcvhdrtail_dummy_kvaddr) { + dma_free_coherent(&dd->pcidev->dev, sizeof(u64), + (void *)dd->rcvhdrtail_dummy_kvaddr, + dd->rcvhdrtail_dummy_physaddr); + dd->rcvhdrtail_dummy_kvaddr = NULL; + } + for (ctxt = 0; tmp && ctxt < dd->num_rcv_contexts; ctxt++) { struct hfi1_ctxtdata *rcd = tmp[ctxt]; @@ -1522,6 +1542,14 @@ int hfi1_create_rcvhdrq(struct hfi1_devdata *dd, struct hfi1_ctxtdata *rcd) reg = (dd->rcvhdrsize & RCV_HDR_SIZE_HDR_SIZE_MASK) << RCV_HDR_SIZE_HDR_SIZE_SHIFT; write_kctxt_csr(dd, rcd->ctxt, RCV_HDR_SIZE, reg); + + /* + * Program dummy tail address for every receive context + * before enabling any receive context + */ + write_kctxt_csr(dd, rcd->ctxt, RCV_HDR_TAIL_ADDR, + dd->rcvhdrtail_dummy_physaddr); + return 0; bail_free: |