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author | Anshuman Khandual <khandual@linux.vnet.ibm.com> | 2014-08-13 14:27:44 +0530 |
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committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2014-08-13 19:01:36 +1000 |
commit | 0a22f85f524f366a3e2ef2af4a3faa0e9cef26ca (patch) | |
tree | 8738d392c6bac1af311c49d64ea30f7ffb714a9f /hw | |
parent | 41534a8beee61413ef302370375f56542b8f029f (diff) | |
download | skiboot-0a22f85f524f366a3e2ef2af4a3faa0e9cef26ca.zip skiboot-0a22f85f524f366a3e2ef2af4a3faa0e9cef26ca.tar.gz skiboot-0a22f85f524f366a3e2ef2af4a3faa0e9cef26ca.tar.bz2 |
dpo: Move the FSP async messagae handling into a separate file
This patch moves the DPO message handling from FSP core code into
a separate file to make it more cleaner and to add OPAL interfaces
in the subsequent patch. It does not change anything functionally.
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'hw')
-rw-r--r-- | hw/fsp/Makefile.inc | 2 | ||||
-rw-r--r-- | hw/fsp/fsp-dpo.c | 94 | ||||
-rw-r--r-- | hw/fsp/fsp.c | 47 |
3 files changed, 95 insertions, 48 deletions
diff --git a/hw/fsp/Makefile.inc b/hw/fsp/Makefile.inc index 95f1f04..d4654d5 100644 --- a/hw/fsp/Makefile.inc +++ b/hw/fsp/Makefile.inc @@ -3,7 +3,7 @@ SUBDIRS += hw/fsp FSP_OBJS = fsp.o fsp-console.o fsp-rtc.o fsp-nvram.o fsp-sysparam.o FSP_OBJS += fsp-surveillance.o fsp-codeupdate.o fsp-sensor.o FSP_OBJS += fsp-diag.o fsp-leds.o fsp-mem-err.o fsp-op-panel.o -FSP_OBJS += fsp-elog-read.o fsp-elog-write.o fsp-epow.o +FSP_OBJS += fsp-elog-read.o fsp-elog-write.o fsp-epow.o fsp-dpo.o FSP_OBJS += fsp-dump.o fsp-mdst-table.o FSP_OBJS += fsp-attn.o FSP = hw/fsp/built-in.o diff --git a/hw/fsp/fsp-dpo.c b/hw/fsp/fsp-dpo.c new file mode 100644 index 0000000..23ab1ba --- /dev/null +++ b/hw/fsp/fsp-dpo.c @@ -0,0 +1,94 @@ +/* Copyright 2013-2014 IBM Corp. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or + * implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +/* + * Handle FSP DPO (Delayed Power Off) event notification + */ +#include <skiboot.h> +#include <console.h> +#include <fsp.h> +#include <device.h> +#include <stdio.h> +#include <opal.h> +#include <opal-msg.h> + +#define PREFIX "FSPDPO: " + +static bool fsp_dpo_pending = false; + +/* Process FSP DPO init message */ +static void fsp_process_dpo(struct fsp_msg *msg) +{ + u32 cmd = FSP_RSP_INIT_DPO; + int rc; + + /* DPO message does not have the correct signatures */ + if ((msg->data.bytes[0] != 0xf4) || (msg->data.bytes[1] != 0x20)) { + printf("DPO: Message signatures did not match\n"); + cmd |= FSP_STATUS_INVALID_CMD; + fsp_queue_msg(fsp_mkmsg(cmd, 0), fsp_freemsg); + return; + } + + /* Sapphire is already in "DPO pending" state */ + if (fsp_dpo_pending) { + printf("DPO: Sapphire is already in DPO pending state\n"); + cmd |= FSP_STATUS_INVALID_DPOSTATE; + fsp_queue_msg(fsp_mkmsg(cmd, 0), fsp_freemsg); + return; + } + + /* Inform the host about DPO */ + rc = opal_queue_msg(OPAL_MSG_DPO, NULL, NULL); + if (rc) { + printf("DPO: OPAL message queuing failed\n"); + return; + } + + /* Acknowledge the FSP on DPO */ + fsp_queue_msg(fsp_mkmsg(cmd, 0), fsp_freemsg); + fsp_dpo_pending = true; + /* + * Sapphire is now in DPO pending state. After first detecting DPO + * condition from Sapphire, the host will have 45 minutes to prepare + * the system for shutdown. The host must take all necessary actions + * required in that regard and at the end shutdown itself. The host + * shutdown sequence eventually will make the call OPAL_CEC_POWER_DOWN + * which in turn ask the FSP to shutdown the CEC. If the FSP does not + * receive the cec power down command from Sapphire within 45 minutes, + * it will assume that the host and the Sapphire has processed the DPO + * sequence successfully and hence force power off the system. + */ +} + +/* Handle DPO sub-command from FSP */ +static bool fsp_dpo_message(u32 cmd_sub_mod, struct fsp_msg *msg) +{ + if (cmd_sub_mod == FSP_CMD_INIT_DPO) { + printf(PREFIX "SP initiated Delayed Power Off (DPO)\n"); + fsp_process_dpo(msg); + } + return false; +} + +static struct fsp_client fsp_dpo_client = { + .message = fsp_dpo_message, +}; + +void fsp_dpo_init(void) +{ + fsp_register_client(&fsp_dpo_client, FSP_MCLASS_SERVICE); + printf(PREFIX "FSP DPO support initialized\n"); +} diff --git a/hw/fsp/fsp.c b/hw/fsp/fsp.c index 2189bbb..57cba31 100644 --- a/hw/fsp/fsp.c +++ b/hw/fsp/fsp.c @@ -100,9 +100,6 @@ static u64 fsp_hir_timeout; #define FSP_CRITICAL_OP_TIMEOUT 128 #define FSP_DRCR_CLEAR_TIMEOUT 128 -/* DPO pending state */ -static bool fsp_dpo_pending = false; - /* * We keep track on last logged values for some things to print only on * value changes, but also to releive pressure on the tracer which @@ -1123,7 +1120,6 @@ static bool fsp_local_command(u32 cmd_sub_mod, struct fsp_msg *msg) { u32 cmd = 0; u32 rsp_data = 0; - int rc; switch(cmd_sub_mod) { case FSP_CMD_CONTINUE_IPL: @@ -1184,49 +1180,6 @@ static bool fsp_local_command(u32 cmd_sub_mod, struct fsp_msg *msg) fsp_repost_queued_msgs_post_rr(); } return true; - case FSP_CMD_INIT_DPO: - printf("FSP: SP initiated DPO (Delayed Power Off)\n"); - cmd = FSP_RSP_INIT_DPO; - - /* DPO message does not have the correct signatures */ - if ((msg->data.bytes[0] != 0xf4) || (msg->data.bytes[1] != 0x20)) { - printf("DPO: Message signatures did not match\n"); - cmd |= FSP_STATUS_INVALID_CMD; - fsp_queue_msg(fsp_mkmsg(cmd, 0), fsp_freemsg); - return false; - } - - /* Sapphire is already in "DPO pending" state */ - if (fsp_dpo_pending) { - printf("DPO: Sapphire is already in DPO pending state\n"); - cmd |= FSP_STATUS_INVALID_DPOSTATE; - fsp_queue_msg(fsp_mkmsg(cmd, 0), fsp_freemsg); - return false; - } - - /* Inform the host about DPO */ - rc = opal_queue_msg(OPAL_MSG_DPO, NULL, NULL); - if (rc) { - printf("DPO: OPAL message queuing failed\n"); - return false; - } - - /* Acknowledge the FSP on DPO */ - fsp_queue_msg(fsp_mkmsg(cmd, 0), fsp_freemsg); - fsp_dpo_pending = true; - - /* - * Sapphire is now in DPO pending state. After first detecting DPO - * condition from Sapphire, the host will have 45 minutes to prepare - * the system for shutdown. The host must take all necessary actions - * required in that regard and at the end shutdown itself. The host - * shutdown sequence eventually will make the call OPAL_CEC_POWER_DOWN - * which in turn ask the FSP to shutdown the CEC. If the FSP does not - * receive the cec power down command from Sapphire within 45 minutes, - * it will assume that the host and the Sapphire has processed the DPO - * sequence successfully and hence force power off the system. - */ - return true; case FSP_CMD_CLOSE_HMC_INTF: /* Close the HMC interface */ /* Though Sapphire does not support a HMC connection, the FSP |