diff options
| -rw-r--r-- | drivers/infiniband/hw/hfi1/chip.c | 77 | ||||
| -rw-r--r-- | drivers/infiniband/hw/hfi1/chip.h | 1 | ||||
| -rw-r--r-- | drivers/infiniband/hw/hfi1/firmware.c | 63 |
3 files changed, 101 insertions, 40 deletions
diff --git a/drivers/infiniband/hw/hfi1/chip.c b/drivers/infiniband/hw/hfi1/chip.c index 1660a641f4f7..98bcd06c82d7 100644 --- a/drivers/infiniband/hw/hfi1/chip.c +++ b/drivers/infiniband/hw/hfi1/chip.c @@ -6518,12 +6518,11 @@ static void _dc_start(struct hfi1_devdata *dd) if (!dd->dc_shutdown) return; - /* Take the 8051 out of reset */ - write_csr(dd, DC_DC8051_CFG_RST, 0ull); - /* Wait until 8051 is ready */ - if (wait_fm_ready(dd, TIMEOUT_8051_START)) - dd_dev_err(dd, "%s: timeout starting 8051 firmware\n", - __func__); + /* + * Take the 8051 out of reset, wait until 8051 is ready, and set host + * version bit. + */ + release_and_wait_ready_8051_firmware(dd); /* Take away reset for LCB and RX FPE (set in lcb_shutdown). */ write_csr(dd, DCC_CFG_RESET, 0x10); @@ -8591,30 +8590,23 @@ int write_lcb_csr(struct hfi1_devdata *dd, u32 addr, u64 data) } /* + * If the 8051 is in reset mode (dd->dc_shutdown == 1), this function + * will still continue executing. + * * Returns: * < 0 = Linux error, not able to get access * > 0 = 8051 command RETURN_CODE */ -static int do_8051_command( - struct hfi1_devdata *dd, - u32 type, - u64 in_data, - u64 *out_data) +static int _do_8051_command(struct hfi1_devdata *dd, u32 type, u64 in_data, + u64 *out_data) { u64 reg, completed; int return_code; unsigned long timeout; + lockdep_assert_held(&dd->dc8051_lock); hfi1_cdbg(DC8051, "type %d, data 0x%012llx", type, in_data); - mutex_lock(&dd->dc8051_lock); - - /* We can't send any commands to the 8051 if it's in reset */ - if (dd->dc_shutdown) { - return_code = -ENODEV; - goto fail; - } - /* * If an 8051 host command timed out previously, then the 8051 is * stuck. @@ -8715,6 +8707,29 @@ static int do_8051_command( write_csr(dd, DC_DC8051_CFG_HOST_CMD_0, 0); fail: + return return_code; +} + +/* + * Returns: + * < 0 = Linux error, not able to get access + * > 0 = 8051 command RETURN_CODE + */ +static int do_8051_command(struct hfi1_devdata *dd, u32 type, u64 in_data, + u64 *out_data) +{ + int return_code; + + mutex_lock(&dd->dc8051_lock); + /* We can't send any commands to the 8051 if it's in reset */ + if (dd->dc_shutdown) { + return_code = -ENODEV; + goto fail; + } + + return_code = _do_8051_command(dd, type, in_data, out_data); + +fail: mutex_unlock(&dd->dc8051_lock); return return_code; } @@ -8724,16 +8739,17 @@ static int set_physical_link_state(struct hfi1_devdata *dd, u64 state) return do_8051_command(dd, HCMD_CHANGE_PHY_STATE, state, NULL); } -int load_8051_config(struct hfi1_devdata *dd, u8 field_id, - u8 lane_id, u32 config_data) +int _load_8051_config(struct hfi1_devdata *dd, u8 field_id, + u8 lane_id, u32 config_data) { u64 data; int ret; + lockdep_assert_held(&dd->dc8051_lock); data = (u64)field_id << LOAD_DATA_FIELD_ID_SHIFT | (u64)lane_id << LOAD_DATA_LANE_ID_SHIFT | (u64)config_data << LOAD_DATA_DATA_SHIFT; - ret = do_8051_command(dd, HCMD_LOAD_CONFIG_DATA, data, NULL); + ret = _do_8051_command(dd, HCMD_LOAD_CONFIG_DATA, data, NULL); if (ret != HCMD_SUCCESS) { dd_dev_err(dd, "load 8051 config: field id %d, lane %d, err %d\n", @@ -8742,6 +8758,18 @@ int load_8051_config(struct hfi1_devdata *dd, u8 field_id, return ret; } +int load_8051_config(struct hfi1_devdata *dd, u8 field_id, + u8 lane_id, u32 config_data) +{ + int return_code; + + mutex_lock(&dd->dc8051_lock); + return_code = _load_8051_config(dd, field_id, lane_id, config_data); + mutex_unlock(&dd->dc8051_lock); + + return return_code; +} + /* * Read the 8051 firmware "registers". Use the RAM directly. Always * set the result, even on error. @@ -8857,13 +8885,14 @@ int write_host_interface_version(struct hfi1_devdata *dd, u8 version) u32 frame; u32 mask; + lockdep_assert_held(&dd->dc8051_lock); mask = (HOST_INTERFACE_VERSION_MASK << HOST_INTERFACE_VERSION_SHIFT); read_8051_config(dd, RESERVED_REGISTERS, GENERAL_CONFIG, &frame); /* Clear, then set field */ frame &= ~mask; frame |= ((u32)version << HOST_INTERFACE_VERSION_SHIFT); - return load_8051_config(dd, RESERVED_REGISTERS, GENERAL_CONFIG, - frame); + return _load_8051_config(dd, RESERVED_REGISTERS, GENERAL_CONFIG, + frame); } void read_misc_status(struct hfi1_devdata *dd, u8 *ver_major, u8 *ver_minor, diff --git a/drivers/infiniband/hw/hfi1/chip.h b/drivers/infiniband/hw/hfi1/chip.h index b8345a60a0fb..579a6c70b93e 100644 --- a/drivers/infiniband/hw/hfi1/chip.h +++ b/drivers/infiniband/hw/hfi1/chip.h @@ -709,6 +709,7 @@ void read_misc_status(struct hfi1_devdata *dd, u8 *ver_major, u8 *ver_minor, u8 *ver_patch); int write_host_interface_version(struct hfi1_devdata *dd, u8 version); void read_guid(struct hfi1_devdata *dd); +int release_and_wait_ready_8051_firmware(struct hfi1_devdata *dd); int wait_fm_ready(struct hfi1_devdata *dd, u32 mstimeout); void set_link_down_reason(struct hfi1_pportdata *ppd, u8 lcl_reason, u8 neigh_reason, u8 rem_reason); diff --git a/drivers/infiniband/hw/hfi1/firmware.c b/drivers/infiniband/hw/hfi1/firmware.c index 9471c4063ebe..dee3c674f33d 100644 --- a/drivers/infiniband/hw/hfi1/firmware.c +++ b/drivers/infiniband/hw/hfi1/firmware.c @@ -971,6 +971,46 @@ int wait_fm_ready(struct hfi1_devdata *dd, u32 mstimeout) } /* + * Clear all reset bits, releasing the 8051. + * Wait for firmware to be ready to accept host requests. + * Then, set host version bit. + * + * This function executes even if the 8051 is in reset mode when + * dd->dc_shutdown == 1. + * + * Expects dd->dc8051_lock to be held. + */ +int release_and_wait_ready_8051_firmware(struct hfi1_devdata *dd) +{ + int ret; + + lockdep_assert_held(&dd->dc8051_lock); + /* clear all reset bits, releasing the 8051 */ + write_csr(dd, DC_DC8051_CFG_RST, 0ull); + + /* + * Wait for firmware to be ready to accept host + * requests. + */ + ret = wait_fm_ready(dd, TIMEOUT_8051_START); + if (ret) { + dd_dev_err(dd, "8051 start timeout, current FW state 0x%x\n", + get_firmware_state(dd)); + return ret; + } + + ret = write_host_interface_version(dd, HOST_INTERFACE_VERSION); + if (ret != HCMD_SUCCESS) { + dd_dev_err(dd, + "Failed to set host interface version, return 0x%x\n", + ret); + return -EIO; + } + + return 0; +} + +/* * Load the 8051 firmware. */ static int load_8051_firmware(struct hfi1_devdata *dd, @@ -1035,31 +1075,22 @@ static int load_8051_firmware(struct hfi1_devdata *dd, if (ret) return ret; - /* clear all reset bits, releasing the 8051 */ - write_csr(dd, DC_DC8051_CFG_RST, 0ull); - /* + * Clear all reset bits, releasing the 8051. * DC reset step 5. Wait for firmware to be ready to accept host * requests. + * Then, set host version bit. */ - ret = wait_fm_ready(dd, TIMEOUT_8051_START); - if (ret) { /* timed out */ - dd_dev_err(dd, "8051 start timeout, current state 0x%x\n", - get_firmware_state(dd)); - return -ETIMEDOUT; - } + mutex_lock(&dd->dc8051_lock); + ret = release_and_wait_ready_8051_firmware(dd); + mutex_unlock(&dd->dc8051_lock); + if (ret) + return ret; read_misc_status(dd, &ver_major, &ver_minor, &ver_patch); dd_dev_info(dd, "8051 firmware version %d.%d.%d\n", (int)ver_major, (int)ver_minor, (int)ver_patch); dd->dc8051_ver = dc8051_ver(ver_major, ver_minor, ver_patch); - ret = write_host_interface_version(dd, HOST_INTERFACE_VERSION); - if (ret != HCMD_SUCCESS) { - dd_dev_err(dd, - "Failed to set host interface version, return 0x%x\n", - ret); - return -EIO; - } return 0; } |