From 3afb6f637e8edd68cee35b5c432c176f57fd712f Mon Sep 17 00:00:00 2001 From: Dean Luick Date: Sat, 5 Mar 2016 08:49:39 -0800 Subject: [PATCH] IB/hfi1: Remove ASIC block clear The ASIC block is shared between two HFIs. Individual devices should not initialize registers there. Retain the power-on values. Individual users set registers as needed with one exception. Clear sbus fast mode on "slow" calls. Reviewed-by: Mitko Haralanov Reviewed-by: Easwar Hariharan Signed-off-by: Dean Luick Signed-off-by: Jubin John Signed-off-by: Doug Ledford --- drivers/staging/rdma/hfi1/chip.c | 88 ------------------------------------ drivers/staging/rdma/hfi1/firmware.c | 3 ++ 2 files changed, 3 insertions(+), 88 deletions(-) diff --git a/drivers/staging/rdma/hfi1/chip.c b/drivers/staging/rdma/hfi1/chip.c index 263c882..0874287 100644 --- a/drivers/staging/rdma/hfi1/chip.c +++ b/drivers/staging/rdma/hfi1/chip.c @@ -12934,91 +12934,6 @@ static void reset_cce_csrs(struct hfi1_devdata *dd) write_csr(dd, CCE_INT_COUNTER_ARRAY32 + (8 * i), 0); } -/* set ASIC CSRs to chip reset defaults */ -static void reset_asic_csrs(struct hfi1_devdata *dd) -{ - int i; - - /* - * If the HFIs are shared between separate nodes or VMs, - * then more will need to be done here. One idea is a module - * parameter that returns early, letting the first power-on or - * a known first load do the reset and blocking all others. - */ - - if (!(dd->flags & HFI1_DO_INIT_ASIC)) - return; - - if (dd->icode != ICODE_FPGA_EMULATION) { - /* emulation does not have an SBus - leave these alone */ - /* - * All writes to ASIC_CFG_SBUS_REQUEST do something. - * Notes: - * o The reset is not zero if aimed at the core. See the - * SBus documentation for details. - * o If the SBus firmware has been updated (e.g. by the BIOS), - * will the reset revert that? - */ - /* ASIC_CFG_SBUS_REQUEST leave alone */ - write_csr(dd, ASIC_CFG_SBUS_EXECUTE, 0); - } - /* ASIC_SBUS_RESULT read-only */ - write_csr(dd, ASIC_STS_SBUS_COUNTERS, 0); - for (i = 0; i < ASIC_NUM_SCRATCH; i++) - write_csr(dd, ASIC_CFG_SCRATCH + (8 * i), 0); - write_csr(dd, ASIC_CFG_MUTEX, 0); /* this will clear it */ - - /* We might want to retain this state across FLR if we ever use it */ - write_csr(dd, ASIC_CFG_DRV_STR, 0); - - /* ASIC_CFG_THERM_POLL_EN leave alone */ - /* ASIC_STS_THERM read-only */ - /* ASIC_CFG_RESET leave alone */ - - write_csr(dd, ASIC_PCIE_SD_HOST_CMD, 0); - /* ASIC_PCIE_SD_HOST_STATUS read-only */ - write_csr(dd, ASIC_PCIE_SD_INTRPT_DATA_CODE, 0); - write_csr(dd, ASIC_PCIE_SD_INTRPT_ENABLE, 0); - /* ASIC_PCIE_SD_INTRPT_PROGRESS read-only */ - write_csr(dd, ASIC_PCIE_SD_INTRPT_STATUS, ~0ull); /* clear */ - /* ASIC_HFI0_PCIE_SD_INTRPT_RSPD_DATA read-only */ - /* ASIC_HFI1_PCIE_SD_INTRPT_RSPD_DATA read-only */ - for (i = 0; i < 16; i++) - write_csr(dd, ASIC_PCIE_SD_INTRPT_LIST + (8 * i), 0); - - /* ASIC_GPIO_IN read-only */ - write_csr(dd, ASIC_GPIO_OE, 0); - write_csr(dd, ASIC_GPIO_INVERT, 0); - write_csr(dd, ASIC_GPIO_OUT, 0); - write_csr(dd, ASIC_GPIO_MASK, 0); - /* ASIC_GPIO_STATUS read-only */ - write_csr(dd, ASIC_GPIO_CLEAR, ~0ull); - /* ASIC_GPIO_FORCE leave alone */ - - /* ASIC_QSFP1_IN read-only */ - write_csr(dd, ASIC_QSFP1_OE, 0); - write_csr(dd, ASIC_QSFP1_INVERT, 0); - write_csr(dd, ASIC_QSFP1_OUT, 0); - write_csr(dd, ASIC_QSFP1_MASK, 0); - /* ASIC_QSFP1_STATUS read-only */ - write_csr(dd, ASIC_QSFP1_CLEAR, ~0ull); - /* ASIC_QSFP1_FORCE leave alone */ - - /* ASIC_QSFP2_IN read-only */ - write_csr(dd, ASIC_QSFP2_OE, 0); - write_csr(dd, ASIC_QSFP2_INVERT, 0); - write_csr(dd, ASIC_QSFP2_OUT, 0); - write_csr(dd, ASIC_QSFP2_MASK, 0); - /* ASIC_QSFP2_STATUS read-only */ - write_csr(dd, ASIC_QSFP2_CLEAR, ~0ull); - /* ASIC_QSFP2_FORCE leave alone */ - - write_csr(dd, ASIC_EEP_CTL_STAT, ASIC_EEP_CTL_STAT_RESETCSR); - /* this also writes a NOP command, clearing paging mode */ - write_csr(dd, ASIC_EEP_ADDR_CMD, 0); - write_csr(dd, ASIC_EEP_DATA, 0); -} - /* set MISC CSRs to chip reset defaults */ static void reset_misc_csrs(struct hfi1_devdata *dd) { @@ -13428,14 +13343,11 @@ static void init_chip(struct hfi1_devdata *dd) hfi1_pcie_flr(dd); restore_pci_variables(dd); } - - reset_asic_csrs(dd); } else { dd_dev_info(dd, "Resetting CSRs with writes\n"); reset_cce_csrs(dd); reset_txe_csrs(dd); reset_rxe_csrs(dd); - reset_asic_csrs(dd); reset_misc_csrs(dd); } /* clear the DC reset */ diff --git a/drivers/staging/rdma/hfi1/firmware.c b/drivers/staging/rdma/hfi1/firmware.c index d5befd1..ca4e489 100644 --- a/drivers/staging/rdma/hfi1/firmware.c +++ b/drivers/staging/rdma/hfi1/firmware.c @@ -1170,6 +1170,9 @@ int sbus_request_slow(struct hfi1_devdata *dd, { u64 reg, count = 0; + /* make sure fast mode is clear */ + clear_sbus_fast_mode(dd); + sbus_request(dd, receiver_addr, data_addr, command, data_in); write_csr(dd, ASIC_CFG_SBUS_EXECUTE, ASIC_CFG_SBUS_EXECUTE_EXECUTE_SMASK); -- 2.7.4