/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License, Version 1.0 only * (the "License"). You may not use this file except in compliance * with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright 2005 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ #pragma ident "%Z%%M% %I% %E% SMI" /* * s1394_asynch.c * 1394 Services Layer Asynchronous Communications Routines * These routines handle all of the tasks relating to asynch commands */ #include #include #include #include #include #include #include #include #include #include #include #include static void s1394_handle_lock(cmd1394_cmd_t *cmd); static cmd1394_cmd_t *s1394_pending_q_remove(s1394_hal_t *hal); static boolean_t s1394_process_pending_q(s1394_hal_t *hal); static boolean_t s1394_pending_q_helper(s1394_hal_t *hal, cmd1394_cmd_t *cmd); static int s1394_process_split_lock(cmd1394_cmd_t *cmd, cmd1394_cmd_t *target_cmd); static int s1394_finish_split_lock(cmd1394_cmd_t *cmd, cmd1394_cmd_t *target_cmd); /* * s1394_alloc_cmd() * is used to allocate a command for a target or for a HAL. */ int s1394_alloc_cmd(s1394_hal_t *hal, uint_t flags, cmd1394_cmd_t **cmdp) { s1394_cmd_priv_t *s_priv; void *hal_overhead; uint_t cmd_size; int alloc_sleep; TNF_PROBE_0_DEBUG(s1394_alloc_cmd_enter, S1394_TNF_SL_STACK, ""); alloc_sleep = (flags & T1394_ALLOC_CMD_NOSLEEP) ? KM_NOSLEEP : KM_SLEEP; if ((alloc_sleep == KM_SLEEP) && (curthread->t_flag == T_INTR_THREAD)) { TNF_PROBE_1(s1394_alloc_cmd_error, S1394_TNF_SL_ATREQ_ERROR, "", tnf_string, msg, "Tried to sleep in intr context"); TNF_PROBE_0_DEBUG(s1394_alloc_cmd_exit, S1394_TNF_SL_ATREQ_STACK, ""); ASSERT(alloc_sleep != KM_SLEEP); /* fail */ return (DDI_FAILURE); } /* either FCP command or response, but not both */ if ((flags & (T1394_ALLOC_CMD_FCP_COMMAND | T1394_ALLOC_CMD_FCP_RESPONSE)) == (T1394_ALLOC_CMD_FCP_COMMAND | T1394_ALLOC_CMD_FCP_RESPONSE)) { TNF_PROBE_1(s1394_alloc_cmd_error, S1394_TNF_SL_ATREQ_ERROR, "", tnf_string, msg, "Both FCP cmd and resp flags"); TNF_PROBE_0_DEBUG(s1394_alloc_cmd_exit, S1394_TNF_SL_ATREQ_STACK, ""); return (DDI_FAILURE); } *cmdp = kmem_cache_alloc(hal->hal_kmem_cachep, alloc_sleep); if (*cmdp == NULL) { TNF_PROBE_0_DEBUG(s1394_alloc_cmd_exit, S1394_TNF_SL_STACK, ""); return (DDI_FAILURE); } cmd_size = sizeof (cmd1394_cmd_t) + sizeof (s1394_cmd_priv_t) + hal->halinfo.hal_overhead; bzero((void *)*cmdp, cmd_size); (*cmdp)->cmd_version = T1394_VERSION_V1; (*cmdp)->cmd_result = CMD1394_NOSTATUS; /* Get the Services Layer private area */ s_priv = S1394_GET_CMD_PRIV(*cmdp); /* Set extension type */ if (flags & T1394_ALLOC_CMD_FCP_COMMAND) { s1394_fa_init_cmd(s_priv, S1394_FA_TYPE_FCP_CTL); } else if (flags & T1394_ALLOC_CMD_FCP_RESPONSE) { s1394_fa_init_cmd(s_priv, S1394_FA_TYPE_FCP_TGT); } /* Set up the hal_overhead ptr in the hal_cmd_private */ hal_overhead = (uchar_t *)s_priv + sizeof (s1394_cmd_priv_t); s_priv->hal_cmd_private.hal_overhead = (void *)hal_overhead; TNF_PROBE_1_DEBUG(s1394_alloc_cmd, S1394_TNF_SL_STACK, "", tnf_opaque, cmd, *cmdp); /* kstats - number of cmd allocs */ hal->hal_kstats->cmd_alloc++; TNF_PROBE_0_DEBUG(s1394_alloc_cmd_exit, S1394_TNF_SL_STACK, ""); return (DDI_SUCCESS); } /* * s1394_free_cmd() * is used to free a command that had been previously allocated by * s1394_alloc_cmd(). */ int s1394_free_cmd(s1394_hal_t *hal, cmd1394_cmd_t **cmdp) { s1394_cmd_priv_t *s_priv; TNF_PROBE_0_DEBUG(s1394_free_cmd_enter, S1394_TNF_SL_STACK, ""); /* Get the Services Layer private area */ s_priv = S1394_GET_CMD_PRIV(*cmdp); /* Check that command isn't in use */ if (s_priv->cmd_in_use == B_TRUE) { TNF_PROBE_1(s1394_free_cmd_error, S1394_TNF_SL_ERROR, "", tnf_string, msg, "Attempted to free an in-use command"); TNF_PROBE_0_DEBUG(s1394_free_cmd_exit, S1394_TNF_SL_STACK, ""); ASSERT(s_priv->cmd_in_use == B_FALSE); return (DDI_FAILURE); } TNF_PROBE_1_DEBUG(s1394_free_cmd, S1394_TNF_SL_STACK, "", tnf_opaque, cmd, *cmdp); /* kstats - number of cmd allocs */ kmem_cache_free(hal->hal_kmem_cachep, *cmdp); /* Command pointer is set to NULL before returning */ *cmdp = NULL; /* kstats - number of cmd frees */ hal->hal_kstats->cmd_free++; TNF_PROBE_0_DEBUG(s1394_free_cmd_exit, S1394_TNF_SL_STACK, ""); return (DDI_SUCCESS); } /* * s1394_xfer_asynch_command() * is used to send an asynch command down to the HAL. Based upon the type * of command that is being sent, the appropriate HAL function is called. * Command failures are handled be returning an error and/or shutting down * the HAL, depending on the severity of the error. */ int s1394_xfer_asynch_command(s1394_hal_t *hal, cmd1394_cmd_t *cmd, int *err) { s1394_cmd_priv_t *s_priv; h1394_cmd_priv_t *h_priv; s1394_hal_state_t state; dev_info_t *dip; int result_from_hal; int ret; TNF_PROBE_0_DEBUG(s1394_xfer_asynch_command_enter, S1394_TNF_SL_ATREQ_STACK, ""); ASSERT(MUTEX_NOT_HELD(&hal->topology_tree_mutex)); mutex_enter(&hal->topology_tree_mutex); state = hal->hal_state; if (((state != S1394_HAL_NORMAL) && (state != S1394_HAL_RESET)) || (hal->disable_requests_bit == 1)) { *err = s1394_HAL_asynch_error(hal, cmd, state); mutex_exit(&hal->topology_tree_mutex); TNF_PROBE_0_DEBUG(s1394_xfer_asynch_command_exit, S1394_TNF_SL_ATREQ_STACK, ""); return (DDI_FAILURE); } mutex_exit(&hal->topology_tree_mutex); /* Get the Services Layer private area */ s_priv = S1394_GET_CMD_PRIV(cmd); /* Get a pointer to the HAL private struct */ h_priv = (h1394_cmd_priv_t *)&s_priv->hal_cmd_private; /* kstats - number of AT requests sent */ switch (cmd->cmd_type) { case CMD1394_ASYNCH_RD_QUAD: hal->hal_kstats->atreq_quad_rd++; break; case CMD1394_ASYNCH_RD_BLOCK: hal->hal_kstats->atreq_blk_rd++; break; case CMD1394_ASYNCH_WR_QUAD: hal->hal_kstats->atreq_quad_wr++; break; case CMD1394_ASYNCH_WR_BLOCK: hal->hal_kstats->atreq_blk_wr++; hal->hal_kstats->atreq_blk_wr_size += h_priv->mblk.length; break; case CMD1394_ASYNCH_LOCK_32: hal->hal_kstats->atreq_lock32++; break; case CMD1394_ASYNCH_LOCK_64: hal->hal_kstats->atreq_lock64++; break; } switch (s_priv->cmd_priv_xfer_type) { /* Call the HAL's read entry point */ case S1394_CMD_READ: ret = HAL_CALL(hal).read(hal->halinfo.hal_private, (cmd1394_cmd_t *)cmd, (h1394_cmd_priv_t *)&s_priv->hal_cmd_private, &result_from_hal); break; /* Call the HAL's write entry point */ case S1394_CMD_WRITE: ret = HAL_CALL(hal).write(hal->halinfo.hal_private, (cmd1394_cmd_t *)cmd, (h1394_cmd_priv_t *)&s_priv->hal_cmd_private, &result_from_hal); break; /* Call the HAL's lock entry point */ case S1394_CMD_LOCK: ret = HAL_CALL(hal).lock(hal->halinfo.hal_private, (cmd1394_cmd_t *)cmd, (h1394_cmd_priv_t *)&s_priv->hal_cmd_private, &result_from_hal); break; default: *err = CMD1394_EUNKNOWN_ERROR; TNF_PROBE_1(s1394_xfer_asynch_command_error, S1394_TNF_SL_ATREQ_ERROR, "", tnf_string, msg, "Invalid command type specified"); TNF_PROBE_0_DEBUG(s1394_xfer_asynch_command_exit, S1394_TNF_SL_ATREQ_STACK, ""); return (DDI_FAILURE); } TNF_PROBE_0_DEBUG(s1394_xfer_asynch_command_return_from_HAL, S1394_TNF_SL_ATREQ_STACK, ""); if (ret == DDI_FAILURE) { switch (result_from_hal) { case H1394_STATUS_EMPTY_TLABEL: /* Out of TLABELs - Unable to send AT req */ *err = CMD1394_ENO_ATREQ; break; case H1394_STATUS_INVALID_BUSGEN: /* Out of TLABELs - Unable to send AT req */ *err = CMD1394_ESTALE_GENERATION; break; case H1394_STATUS_NOMORE_SPACE: /* No more space on HAL's HW queue */ *err = CMD1394_ENO_ATREQ; break; case H1394_STATUS_INTERNAL_ERROR: dip = hal->halinfo.dip; /* An unexpected error in the HAL */ cmn_err(CE_WARN, HALT_ERROR_MESSAGE, ddi_node_name(dip), ddi_get_instance(dip)); /* Disable the HAL */ s1394_hal_shutdown(hal, B_TRUE); *err = CMD1394_EFATAL_ERROR; break; default: dip = hal->halinfo.dip; /* An unexpected error in the HAL */ cmn_err(CE_WARN, HALT_ERROR_MESSAGE, ddi_node_name(dip), ddi_get_instance(dip)); /* Disable the HAL */ s1394_hal_shutdown(hal, B_TRUE); *err = CMD1394_EFATAL_ERROR; break; } TNF_PROBE_2_DEBUG(s1394_xfer_asynch_command_exit, S1394_TNF_SL_ATREQ_STACK, "", tnf_int, result_from_hal, result_from_hal, tnf_int, err, *err); return (DDI_FAILURE); } /* No errors, return success */ *err = CMD1394_NOSTATUS; TNF_PROBE_0_DEBUG(s1394_xfer_asynch_command_exit, S1394_TNF_SL_ATREQ_STACK, ""); return (DDI_SUCCESS); } /* * s1394_setup_asynch_command() * is used to setup an asynch command to be sent down to the HAL and out * onto the bus. This function handles setting up the destination address * (if necessary), speed, max_payload, putting the command onto the * outstanding Q list, and any other things that must be done prior to * calling the HAL. */ int s1394_setup_asynch_command(s1394_hal_t *hal, s1394_target_t *target, cmd1394_cmd_t *cmd, uint32_t xfer_type, int *err) { s1394_cmd_priv_t *s_priv; h1394_cmd_priv_t *h_priv; uint64_t node; uint32_t from_node; uint32_t to_node; uint32_t bus_capabilities; uint_t current_max_payload; uint_t max_rec; uint_t max_blk; TNF_PROBE_0_DEBUG(s1394_setup_asynch_command_enter, S1394_TNF_SL_ATREQ_STACK, ""); ASSERT(MUTEX_HELD(&hal->topology_tree_mutex)); switch (cmd->cmd_type) { case CMD1394_ASYNCH_RD_QUAD: case CMD1394_ASYNCH_WR_QUAD: case CMD1394_ASYNCH_RD_BLOCK: case CMD1394_ASYNCH_WR_BLOCK: case CMD1394_ASYNCH_LOCK_32: case CMD1394_ASYNCH_LOCK_64: break; default: *err = CMD1394_EINVALID_COMMAND; TNF_PROBE_1(s1394_setup_asynch_command_error, S1394_TNF_SL_ATREQ_ERROR, "", tnf_string, msg, "Invalid command type specified"); TNF_PROBE_0_DEBUG(s1394_setup_asynch_command_exit, S1394_TNF_SL_ATREQ_STACK, ""); return (DDI_FAILURE); } /* Check for potential address roll-over */ if (s1394_address_rollover(cmd) != B_FALSE) { *err = CMD1394_EADDRESS_ERROR; TNF_PROBE_0_DEBUG(s1394_setup_asynch_command_exit, S1394_TNF_SL_ATREQ_STACK, ""); return (DDI_FAILURE); } /* Get the Services Layer private area */ s_priv = S1394_GET_CMD_PRIV(cmd); /* Set up who sent command on which hal */ s_priv->sent_by_target = (s1394_target_t *)target; s_priv->sent_on_hal = (s1394_hal_t *)hal; /* Set up command transfer type */ s_priv->cmd_priv_xfer_type = xfer_type; if (cmd->cmd_options & CMD1394_OVERRIDE_ADDR) { /* Compare the current generation from the HAL struct */ /* to the one given by the target */ /* Speed is to be filled in from speed map */ from_node = IEEE1394_NODE_NUM(hal->node_id); to_node = IEEE1394_ADDR_PHY_ID(cmd->cmd_addr); if (cmd->bus_generation != hal->generation_count) { *err = CMD1394_ESTALE_GENERATION; TNF_PROBE_0_DEBUG(s1394_setup_asynch_command_exit, S1394_TNF_SL_ATREQ_STACK, ""); return (DDI_FAILURE); } } else { /* Set the generation */ cmd->bus_generation = hal->generation_count; /* If not OVERRIDE_ADDR, then target may not be NULL */ ASSERT(target != NULL); rw_enter(&hal->target_list_rwlock, RW_READER); if ((target->target_state & S1394_TARG_GONE) != 0 || target->on_node == NULL) { rw_exit(&hal->target_list_rwlock); *err = CMD1394_EDEVICE_REMOVED; TNF_PROBE_0_DEBUG(s1394_setup_asynch_command_exit, S1394_TNF_SL_ATREQ_STACK, ""); return (DDI_FAILURE); } ASSERT((target->target_state & S1394_TARG_GONE) == 0); node = target->on_node->node_num; rw_exit(&hal->target_list_rwlock); /* Mask in the top 16-bits */ cmd->cmd_addr = (cmd->cmd_addr & IEEE1394_ADDR_OFFSET_MASK); cmd->cmd_addr = (cmd->cmd_addr | (node << IEEE1394_ADDR_PHY_ID_SHIFT)); cmd->cmd_addr = (cmd->cmd_addr | IEEE1394_ADDR_BUS_ID_MASK); /* Speed is to be filled in from speed map */ from_node = IEEE1394_NODE_NUM(hal->node_id); to_node = (uint32_t)node; } /* Get a pointer to the HAL private struct */ h_priv = (h1394_cmd_priv_t *)&s_priv->hal_cmd_private; /* Copy the generation into the HAL's private field */ h_priv->bus_generation = cmd->bus_generation; /* Fill in the nodeID */ cmd->nodeID = (cmd->cmd_addr & IEEE1394_ADDR_NODE_ID_MASK) >> IEEE1394_ADDR_NODE_ID_SHIFT; if (cmd->cmd_options & CMD1394_OVERRIDE_SPEED) { if (cmd->cmd_speed > IEEE1394_S400) { *err = CMD1394_EINVALID_COMMAND; TNF_PROBE_0_DEBUG(s1394_setup_asynch_command_exit, S1394_TNF_SL_ATREQ_STACK, ""); return (DDI_FAILURE); } else { s_priv->hal_cmd_private.speed = (int)cmd->cmd_speed; } } else { /* Speed is to be filled in from speed map */ s_priv->hal_cmd_private.speed = (int)s1394_speed_map_get(hal, from_node, to_node); } /* Is it a block request? */ if ((cmd->cmd_type == CMD1394_ASYNCH_RD_BLOCK) || (cmd->cmd_type == CMD1394_ASYNCH_WR_BLOCK)) { if (cmd->cmd_u.b.data_block == NULL) { *err = CMD1394_ENULL_MBLK; TNF_PROBE_0_DEBUG(s1394_setup_asynch_command_exit, S1394_TNF_SL_ATREQ_STACK, ""); return (DDI_FAILURE); } /* Also need to check for MBLK_TOO_SMALL */ if (s1394_mblk_too_small(cmd) != B_FALSE) { *err = CMD1394_EMBLK_TOO_SMALL; TNF_PROBE_0_DEBUG(s1394_setup_asynch_command_exit, S1394_TNF_SL_ATREQ_STACK, ""); return (DDI_FAILURE); } /* Initialize bytes_transferred to zero */ cmd->cmd_u.b.bytes_transferred = 0; /* Handle the MAX_PAYLOAD size */ if (cmd->cmd_options & CMD1394_OVERRIDE_ADDR) { current_max_payload = 512 << (s_priv->hal_cmd_private.speed); if (hal->topology_tree[to_node].cfgrom) { bus_capabilities = hal->topology_tree[to_node].cfgrom[ IEEE1212_NODE_CAP_QUAD]; max_rec = (bus_capabilities & IEEE1394_BIB_MAXREC_MASK) >> IEEE1394_BIB_MAXREC_SHIFT; } else { max_rec = 0; } if ((max_rec > 0) && (max_rec < 14)) { max_blk = 1 << (max_rec + 1); } else { /* These are either unspecified or reserved */ max_blk = 4; } if (max_blk < current_max_payload) current_max_payload = max_blk; } else { rw_enter(&hal->target_list_rwlock, RW_READER); current_max_payload = target->current_max_payload; rw_exit(&hal->target_list_rwlock); } if (cmd->cmd_options & CMD1394_OVERRIDE_MAX_PAYLOAD) { if (current_max_payload > cmd->cmd_u.b.max_payload) current_max_payload = cmd->cmd_u.b.max_payload; } h_priv->mblk.curr_mblk = cmd->cmd_u.b.data_block; if (cmd->cmd_type == CMD1394_ASYNCH_WR_BLOCK) { h_priv->mblk.curr_offset = cmd->cmd_u.b.data_block->b_rptr; } else { h_priv->mblk.curr_offset = cmd->cmd_u.b.data_block->b_wptr; } if (cmd->cmd_u.b.blk_length > current_max_payload) { h_priv->mblk.length = current_max_payload; s_priv->data_remaining = cmd->cmd_u.b.blk_length; } else { h_priv->mblk.length = cmd->cmd_u.b.blk_length; s_priv->data_remaining = cmd->cmd_u.b.blk_length; } } /* Mark command as being used */ s_priv->cmd_in_use = B_TRUE; /* Put command on the HAL's outstanding request Q */ s1394_insert_q_asynch_cmd(hal, cmd); TNF_PROBE_0_DEBUG(s1394_setup_asynch_command_exit, S1394_TNF_SL_ATREQ_STACK, ""); return (DDI_SUCCESS); } /* * s1394_insert_q_asynch_cmd() * is used to insert a given command structure onto a HAL's outstanding * asynch queue. */ void s1394_insert_q_asynch_cmd(s1394_hal_t *hal, cmd1394_cmd_t *cmd) { s1394_cmd_priv_t *s_priv; s1394_cmd_priv_t *c_priv; cmd1394_cmd_t *temp_cmd; TNF_PROBE_0_DEBUG(s1394_insert_q_asynch_cmd_enter, S1394_TNF_SL_ATREQ_STACK, ""); mutex_enter(&hal->outstanding_q_mutex); /* Get the Services Layer private area */ s_priv = S1394_GET_CMD_PRIV(cmd); /* Is the outstanding request queue empty? */ if ((hal->outstanding_q_head == NULL) && (hal->outstanding_q_tail == NULL)) { hal->outstanding_q_head = (cmd1394_cmd_t *)cmd; hal->outstanding_q_tail = (cmd1394_cmd_t *)cmd; s_priv->cmd_priv_next = (cmd1394_cmd_t *)NULL; s_priv->cmd_priv_prev = (cmd1394_cmd_t *)NULL; } else { s_priv->cmd_priv_next = hal->outstanding_q_head; s_priv->cmd_priv_prev = (cmd1394_cmd_t *)NULL; temp_cmd = (cmd1394_cmd_t *)hal->outstanding_q_head; c_priv = (s1394_cmd_priv_t *)((uchar_t *)temp_cmd + sizeof (cmd1394_cmd_t)); c_priv->cmd_priv_prev = (cmd1394_cmd_t *)cmd; hal->outstanding_q_head = (cmd1394_cmd_t *)cmd; } mutex_exit(&hal->outstanding_q_mutex); TNF_PROBE_0_DEBUG(s1394_insert_q_asynch_cmd_exit, S1394_TNF_SL_ATREQ_STACK, ""); } /* * s1394_remove_q_asynch_cmd() * is used to remove a given command structure from a HAL's outstanding * asynch queue. */ void s1394_remove_q_asynch_cmd(s1394_hal_t *hal, cmd1394_cmd_t *cmd) { s1394_cmd_priv_t *s_priv; s1394_cmd_priv_t *c_priv; cmd1394_cmd_t *prev_cmd; cmd1394_cmd_t *next_cmd; TNF_PROBE_0_DEBUG(s1394_remove_q_asynch_cmd_enter, S1394_TNF_SL_ATREQ_STACK, ""); mutex_enter(&hal->outstanding_q_mutex); /* Get the Services Layer private area */ s_priv = S1394_GET_CMD_PRIV(cmd); prev_cmd = (cmd1394_cmd_t *)s_priv->cmd_priv_prev; next_cmd = (cmd1394_cmd_t *)s_priv->cmd_priv_next; s_priv->cmd_priv_prev = (cmd1394_cmd_t *)NULL; s_priv->cmd_priv_next = (cmd1394_cmd_t *)NULL; if (prev_cmd != NULL) { c_priv = (s1394_cmd_priv_t *)((uchar_t *)prev_cmd + sizeof (cmd1394_cmd_t)); c_priv->cmd_priv_next = (cmd1394_cmd_t *)next_cmd; } else { if (hal->outstanding_q_head == (cmd1394_cmd_t *)cmd) hal->outstanding_q_head = (cmd1394_cmd_t *)next_cmd; } if (next_cmd != NULL) { c_priv = (s1394_cmd_priv_t *)((uchar_t *)next_cmd + sizeof (cmd1394_cmd_t)); c_priv->cmd_priv_prev = (cmd1394_cmd_t *)prev_cmd; } else { if (hal->outstanding_q_tail == (cmd1394_cmd_t *)cmd) hal->outstanding_q_tail = (cmd1394_cmd_t *)prev_cmd; } mutex_exit(&hal->outstanding_q_mutex); TNF_PROBE_0_DEBUG(s1394_remove_q_asynch_cmd_exit, S1394_TNF_SL_ATREQ_STACK, ""); } /* * s1394_atreq_cmd_complete() * is called by h1394_cmd_is_complete() when an AT request has completed. * Based upon a command's completion status, s1394_atreq_cmd_complete() * determines whether to call the target (or unblock), put the command onto * the pending Q to be sent out later, or to resend the command * (multi-part command). */ void s1394_atreq_cmd_complete(s1394_hal_t *hal, cmd1394_cmd_t *req, int status) { s1394_cmd_priv_t *s_priv; h1394_cmd_priv_t *h_priv; dev_info_t *dip; int ret; int cmd_result; int err; TNF_PROBE_0_DEBUG(s1394_atreq_cmd_complete_enter, S1394_TNF_SL_ATREQ_STACK, ""); /* Get the Services Layer private area */ s_priv = S1394_GET_CMD_PRIV(req); /* If not an ack_complete... */ if (status != H1394_CMD_SUCCESS) { /* kstats - number of failure AT responses */ switch (req->cmd_type) { case CMD1394_ASYNCH_RD_QUAD: hal->hal_kstats->atresp_quad_rd_fail++; break; case CMD1394_ASYNCH_RD_BLOCK: hal->hal_kstats->atresp_blk_rd_fail++; break; case CMD1394_ASYNCH_WR_QUAD: hal->hal_kstats->atresp_quad_wr_fail++; break; case CMD1394_ASYNCH_WR_BLOCK: hal->hal_kstats->atresp_blk_wr_fail++; break; case CMD1394_ASYNCH_LOCK_32: hal->hal_kstats->atresp_lock32_fail++; break; case CMD1394_ASYNCH_LOCK_64: hal->hal_kstats->atresp_lock64_fail++; break; } switch (status) { /* evt_missing_ack */ case H1394_CMD_ETIMEOUT: cmd_result = CMD1394_ETIMEOUT; break; /* evt_flushed */ case H1394_CMD_EBUSRESET: /* Move request to pending Q if cancel on */ /* reset is not set */ if (req->cmd_options & CMD1394_CANCEL_ON_BUS_RESET) { cmd_result = CMD1394_EBUSRESET; break; } s1394_remove_q_asynch_cmd(hal, req); s1394_pending_q_insert(hal, req, S1394_PENDING_Q_REAR); TNF_PROBE_0_DEBUG(s1394_atreq_cmd_complete_exit, S1394_TNF_SL_ATREQ_STACK, ""); return; /* ack_busy_X */ /* ack_busy_A */ /* ack_busy_B */ case H1394_CMD_EDEVICE_BUSY: cmd_result = CMD1394_EDEVICE_BUSY; break; /* ack_data_error */ case H1394_CMD_EDATA_ERROR: cmd_result = CMD1394_EDATA_ERROR; break; /* ack_type_error */ case H1394_CMD_ETYPE_ERROR: cmd_result = CMD1394_ETYPE_ERROR; break; /* resp_address_error */ /* ack_address_error */ case H1394_CMD_EADDR_ERROR: cmd_result = CMD1394_EADDRESS_ERROR; break; /* resp_conflict_error */ /* ack_conflict_error */ case H1394_CMD_ERSRC_CONFLICT: cmd_result = CMD1394_ERSRC_CONFLICT; break; /* ack_tardy */ case H1394_CMD_EDEVICE_POWERUP: cmd_result = CMD1394_EDEVICE_BUSY; break; /* device errors (bad tcodes, ACKs, etc...) */ case H1394_CMD_EDEVICE_ERROR: cmd_result = CMD1394_EDEVICE_ERROR; break; /* Unknown error type */ case H1394_CMD_EUNKNOWN_ERROR: cmd_result = CMD1394_EUNKNOWN_ERROR; break; /* Unrecognized error */ default: dip = hal->halinfo.dip; /* An unexpected error in the HAL */ cmn_err(CE_WARN, HALT_ERROR_MESSAGE, ddi_node_name(dip), ddi_get_instance(dip)); /* Disable the HAL */ s1394_hal_shutdown(hal, B_TRUE); TNF_PROBE_2(s1394_atreq_cmd_complete_error, S1394_TNF_SL_ATREQ_ERROR, "", tnf_string, msg, "Unrecognized cmd status code", tnf_int, status, status); TNF_PROBE_0_DEBUG(s1394_atreq_cmd_complete_exit, S1394_TNF_SL_ATREQ_STACK, ""); return; } /* Remove command from the HAL's outstanding request Q */ s1394_remove_q_asynch_cmd(hal, req); s_priv->cmd_in_use = B_FALSE; req->cmd_result = cmd_result; /* Is this a blocking command? */ if (req->cmd_options & CMD1394_BLOCKING) { /* Unblock the waiting command */ mutex_enter(&s_priv->blocking_mutex); s_priv->blocking_flag = B_TRUE; cv_signal(&s_priv->blocking_cv); mutex_exit(&s_priv->blocking_mutex); TNF_PROBE_0_DEBUG(s1394_atreq_cmd_complete_exit, S1394_TNF_SL_ATREQ_STACK, ""); return; } /* Call the target's completion_callback() */ if (req->completion_callback != NULL) { TNF_PROBE_0_DEBUG(s1394_atreq_cmd_complete_do_callback, S1394_TNF_SL_ATREQ_STACK, ""); req->completion_callback(req); } TNF_PROBE_0_DEBUG(s1394_atreq_cmd_complete_exit, S1394_TNF_SL_ATREQ_STACK, ""); return; } /* Successful unless otherwise modified */ err = CMD1394_CMDSUCCESS; if ((req->cmd_type == CMD1394_ASYNCH_RD_BLOCK) || (req->cmd_type == CMD1394_ASYNCH_WR_BLOCK)) { /* Get a pointer to the HAL private struct */ h_priv = (h1394_cmd_priv_t *)&s_priv->hal_cmd_private; /* Update data_remaining */ s_priv->data_remaining -= h_priv->mblk.length; /* Increment bytes_transferred */ req->cmd_u.b.bytes_transferred += h_priv->mblk.length; if (req->cmd_type == CMD1394_ASYNCH_RD_BLOCK) hal->hal_kstats->atreq_blk_rd_size += h_priv->mblk.length; /* Is there still more to send? */ if (s_priv->data_remaining > 0) { /* Setup the new mblk and offset */ h_priv->mblk.curr_mblk = h_priv->mblk.next_mblk; h_priv->mblk.curr_offset = h_priv->mblk.next_offset; /* Update destination address */ if (!(req->cmd_options & CMD1394_DISABLE_ADDR_INCREMENT)) { req->cmd_addr += h_priv->mblk.length; } /* * Use the current MAX_PAYLOAD size. This value * doesn't need to be recalculated because we must * be in the same generation on the bus, else we * would have seen a bus reset error. */ if (s_priv->data_remaining < h_priv->mblk.length) { h_priv->mblk.length = s_priv->data_remaining; } /* Send command out again */ ret = s1394_xfer_asynch_command(hal, req, &err); if (ret == DDI_SUCCESS) { TNF_PROBE_0_DEBUG(s1394_atreq_cmd_complete_exit, S1394_TNF_SL_ATREQ_STACK, ""); return; } else if (err == CMD1394_ESTALE_GENERATION) { /* Remove cmd from outstanding request Q */ s1394_remove_q_asynch_cmd(hal, req); s1394_pending_q_insert(hal, req, S1394_PENDING_Q_REAR); TNF_PROBE_0_DEBUG(s1394_atreq_cmd_complete_exit, S1394_TNF_SL_ATREQ_STACK, ""); return; } } } /* Remove command from the HAL's outstanding request Q */ s1394_remove_q_asynch_cmd(hal, req); s_priv->cmd_in_use = B_FALSE; /* Set status */ req->cmd_result = err; /* Is this a blocking command? */ if (req->cmd_options & CMD1394_BLOCKING) { /* Unblock the waiting command */ mutex_enter(&s_priv->blocking_mutex); s_priv->blocking_flag = B_TRUE; cv_signal(&s_priv->blocking_cv); mutex_exit(&s_priv->blocking_mutex); TNF_PROBE_0_DEBUG(s1394_atreq_cmd_complete_exit, S1394_TNF_SL_ATREQ_STACK, ""); return; } /* Set status and call completion_callback() */ if (req->completion_callback != NULL) { TNF_PROBE_0_DEBUG(s1394_atreq_cmd_complete_do_callback, S1394_TNF_SL_ATREQ_STACK, ""); req->completion_callback(req); TNF_PROBE_0_DEBUG(s1394_atreq_cmd_complete_exit, S1394_TNF_SL_ATREQ_STACK, ""); return; } TNF_PROBE_0_DEBUG(s1394_atreq_cmd_complete_exit, S1394_TNF_SL_ATREQ_STACK, ""); } /* * s1394_atresp_cmd_complete() * is similar to s1394_atreq_cmd_complete(). It is also called by * h1394_cmd_is_complete(), but when an AT response has completed. * Again, based upon the command's completion status, * s1394_atresp_cmd_complete() determines whether to call the target or * to simply cleanup the command and return. */ void s1394_atresp_cmd_complete(s1394_hal_t *hal, cmd1394_cmd_t *resp, int status) { s1394_cmd_priv_t *s_priv; h1394_cmd_priv_t *h_priv; dev_info_t *dip; boolean_t valid_addr_blk; int target_status; TNF_PROBE_0_DEBUG(s1394_atresp_cmd_complete_enter, S1394_TNF_SL_ATRESP_STACK, ""); target_status = CMD1394_CMDSUCCESS; /* If not an ack_complete */ if (status != H1394_CMD_SUCCESS) { switch (status) { /* evt_missing_ack */ case H1394_CMD_ETIMEOUT: target_status = CMD1394_ETIMEOUT; break; /* evt_flushed */ case H1394_CMD_EBUSRESET: target_status = CMD1394_EBUSRESET; break; /* ack_busy_X */ /* ack_busy_A */ /* ack_busy_B */ case H1394_CMD_EDEVICE_BUSY: target_status = CMD1394_EDEVICE_BUSY; break; /* ack_data_error */ case H1394_CMD_EDATA_ERROR: target_status = CMD1394_EDATA_ERROR; break; /* ack_type_error */ case H1394_CMD_ETYPE_ERROR: target_status = CMD1394_ETYPE_ERROR; break; /* ack_address_error */ case H1394_CMD_EADDR_ERROR: target_status = CMD1394_EADDRESS_ERROR; break; /* ack_conflict_error */ case H1394_CMD_ERSRC_CONFLICT: target_status = CMD1394_ERSRC_CONFLICT; break; /* ack_tardy */ case H1394_CMD_EDEVICE_POWERUP: target_status = CMD1394_EDEVICE_BUSY; break; /* device errors (bad tcodes, ACKs, etc...) */ case H1394_CMD_EDEVICE_ERROR: target_status = CMD1394_EDEVICE_ERROR; break; /* Unknown error type */ case H1394_CMD_EUNKNOWN_ERROR: target_status = CMD1394_EUNKNOWN_ERROR; break; /* Unrecognized error */ default: dip = hal->halinfo.dip; /* An unexpected error in the HAL */ cmn_err(CE_WARN, HALT_ERROR_MESSAGE, ddi_node_name(dip), ddi_get_instance(dip)); /* Disable the HAL */ s1394_hal_shutdown(hal, B_TRUE); TNF_PROBE_2(s1394_atresp_cmd_complete_error, S1394_TNF_SL_ATRESP_ERROR, "", tnf_string, msg, "Unrecognized cmd status code", tnf_int, status, status); TNF_PROBE_0_DEBUG(s1394_atresp_cmd_complete_exit, S1394_TNF_SL_ATRESP_STACK, ""); return; } } /* Get the Services Layer private area */ s_priv = S1394_GET_CMD_PRIV(resp); /* Get a pointer to the HAL private struct */ h_priv = (h1394_cmd_priv_t *)&s_priv->hal_cmd_private; valid_addr_blk = s_priv->arreq_valid_addr; if (valid_addr_blk == B_TRUE) { /* Set the command status */ resp->cmd_result = target_status; switch (s_priv->cmd_priv_xfer_type) { case S1394_CMD_READ: case S1394_CMD_WRITE: case S1394_CMD_LOCK: if (resp->completion_callback != NULL) { TNF_PROBE_0_DEBUG( s1394_atresp_cmd_complete_do_callback, S1394_TNF_SL_ATRESP_STACK, ""); resp->completion_callback(resp); } break; default: dip = hal->halinfo.dip; /* An unexpected error in the HAL */ cmn_err(CE_WARN, HALT_ERROR_MESSAGE, ddi_node_name(dip), ddi_get_instance(dip)); /* Disable the HAL */ s1394_hal_shutdown(hal, B_TRUE); TNF_PROBE_1(s1394_atresp_cmd_complete_error, S1394_TNF_SL_ATRESP_ERROR, "", tnf_string, msg, "Unrecognized transfer type"); TNF_PROBE_0_DEBUG(s1394_atresp_cmd_complete_exit, S1394_TNF_SL_ATRESP_STACK, ""); return; } } TNF_PROBE_0_DEBUG(s1394_atresp_cmd_complete_call_hal_cmplt, S1394_TNF_SL_ATRESP_STACK, ""); /* Free the command - Pass it back to the HAL */ HAL_CALL(hal).response_complete(hal->halinfo.hal_private, resp, h_priv); TNF_PROBE_1_DEBUG(s1394_atresp_cmd_complete_exit, S1394_TNF_SL_ATRESP_STACK, "", tnf_int, status, target_status); } /* * s1394_send_response() * is used to send a response to an AR request. Depending on whether the * request was a broadcast request, a write to posted write address space, * or some other request, either a response packet is sent, or the command * is returned to the HAL. A return value of DDI_SUCCESS means that the * command has been handled correctly. It was either successfully sent to * the HAL, or, if it was posted_write of broadcast, it was freed up. A * return value of DDI_FAILURE indicates either a serious error, in which * case the HAL is shutdown, or a failure returned by the HAL, in which * case the command is freed up and notice of the failure is returned. */ int s1394_send_response(s1394_hal_t *hal, cmd1394_cmd_t *resp) { s1394_cmd_priv_t *s_priv; h1394_cmd_priv_t *h_priv; dev_info_t *dip; int ret; int result; TNF_PROBE_0_DEBUG(s1394_send_response_enter, S1394_TNF_SL_ATRESP_STACK, ""); /* Get the Services Layer private area */ s_priv = S1394_GET_CMD_PRIV(resp); /* Get a pointer to the HAL private struct */ h_priv = (h1394_cmd_priv_t *)&s_priv->hal_cmd_private; /* * If request was broadcast or a write request to a posted write * address, don't send a response */ if ((resp->broadcast == 1) || ((s_priv->posted_write == B_TRUE) && ((resp->cmd_result == CMD1394_ASYNCH_WR_QUAD) || (resp->cmd_result == CMD1394_ASYNCH_WR_BLOCK)))) { TNF_PROBE_0_DEBUG(s1394_send_response_call_hal_cmplt, S1394_TNF_SL_ATRESP_STACK, ""); /* Free the command - Pass it back to the HAL */ HAL_CALL(hal).response_complete(hal->halinfo.hal_private, resp, h_priv); TNF_PROBE_0_DEBUG(s1394_send_response_exit, S1394_TNF_SL_ATRESP_STACK, ""); return (DDI_SUCCESS); } TNF_PROBE_0_DEBUG(s1394_send_response_call_hal_resp, S1394_TNF_SL_ATRESP_STACK, ""); /* kstats - number of failure responses sent */ if (resp->cmd_result != IEEE1394_RESP_COMPLETE) { switch (resp->cmd_type) { case CMD1394_ASYNCH_RD_QUAD: hal->hal_kstats->arresp_quad_rd_fail++; break; case CMD1394_ASYNCH_RD_BLOCK: hal->hal_kstats->arresp_blk_rd_fail++; break; case CMD1394_ASYNCH_WR_QUAD: hal->hal_kstats->arresp_quad_wr_fail++; break; case CMD1394_ASYNCH_WR_BLOCK: hal->hal_kstats->arresp_blk_wr_fail++; break; case CMD1394_ASYNCH_LOCK_32: hal->hal_kstats->arresp_lock32_fail++; break; case CMD1394_ASYNCH_LOCK_64: hal->hal_kstats->arresp_lock64_fail++; break; } } else { if (resp->cmd_type == CMD1394_ASYNCH_RD_BLOCK) hal->hal_kstats->arreq_blk_rd_size += resp->cmd_u.b.blk_length; } if (resp->cmd_type == CMD1394_ASYNCH_RD_BLOCK) { h_priv->mblk.curr_mblk = resp->cmd_u.b.data_block; h_priv->mblk.curr_offset = resp->cmd_u.b.data_block->b_rptr; h_priv->mblk.length = resp->cmd_u.b.blk_length; } switch (s_priv->cmd_priv_xfer_type) { case S1394_CMD_READ: ret = HAL_CALL(hal).read_response(hal->halinfo.hal_private, resp, h_priv, &result); break; case S1394_CMD_WRITE: ret = HAL_CALL(hal).write_response(hal->halinfo.hal_private, resp, h_priv, &result); break; case S1394_CMD_LOCK: ret = HAL_CALL(hal).lock_response(hal->halinfo.hal_private, resp, h_priv, &result); break; default: dip = hal->halinfo.dip; /* An unexpected error in the HAL */ cmn_err(CE_WARN, HALT_ERROR_MESSAGE, ddi_node_name(dip), ddi_get_instance(dip)); /* Disable the HAL */ s1394_hal_shutdown(hal, B_TRUE); TNF_PROBE_1(s1394_send_response_error, S1394_TNF_SL_ATRESP_ERROR, "", tnf_string, msg, "Unrecognized transfer type"); TNF_PROBE_0_DEBUG(s1394_send_response_exit, S1394_TNF_SL_ATRESP_STACK, ""); return (DDI_FAILURE); } /* Unable to send a response */ if (ret != DDI_SUCCESS) { if (result == H1394_STATUS_INVALID_BUSGEN) { TNF_PROBE_1(s1394_send_response_error, S1394_TNF_SL_ATRESP_ERROR, "", tnf_string, msg, "Invalid generation in response"); } else if (result == H1394_STATUS_NOMORE_SPACE) { TNF_PROBE_1(s1394_send_response_error, S1394_TNF_SL_ATRESP_ERROR, "", tnf_string, msg, "No more space on AT response queue"); } else { TNF_PROBE_1(s1394_send_response_error, S1394_TNF_SL_ATRESP_ERROR, "", tnf_string, msg, "Unknown problem in s1394_send_response"); } TNF_PROBE_0_DEBUG(s1394_send_response_call_hal_cmplt, S1394_TNF_SL_ATRESP_STACK, ""); /* Free the command - Pass it back to the HAL */ HAL_CALL(hal).response_complete(hal->halinfo.hal_private, resp, h_priv); TNF_PROBE_0_DEBUG(s1394_send_response_exit, S1394_TNF_SL_ATRESP_STACK, ""); return (DDI_FAILURE); } TNF_PROBE_0_DEBUG(s1394_send_response_exit, S1394_TNF_SL_ATRESP_STACK, ""); return (DDI_SUCCESS); } /* * s1394_compare_swap() * is used by t1394_lock() to send a lock request. Any of the lock * requests specified explicitly by the 1394 spec will pass thru here, * i.e compare-swap, mask-swap, etc. */ int s1394_compare_swap(s1394_hal_t *hal, s1394_target_t *target, cmd1394_cmd_t *cmd) { s1394_cmd_priv_t *s_priv; s1394_hal_state_t state; int err; int ret; TNF_PROBE_0_DEBUG(s1394_compare_swap_enter, S1394_TNF_SL_ATREQ_STACK, ""); ASSERT(MUTEX_NOT_HELD(&hal->topology_tree_mutex)); /* Lock the topology tree - protect from bus reset */ mutex_enter(&hal->topology_tree_mutex); ret = s1394_setup_asynch_command(hal, target, cmd, S1394_CMD_LOCK, &err); /* Unlock the topology tree */ mutex_exit(&hal->topology_tree_mutex); /* Get the Services Layer private area */ s_priv = S1394_GET_CMD_PRIV(cmd); /* Command has now been put onto the queue! */ if (ret != DDI_SUCCESS) { /* Copy error code into result */ cmd->cmd_result = err; TNF_PROBE_0(s1394_compare_swap_error_in_setup_asynch, S1394_TNF_SL_ATREQ_ERROR, ""); TNF_PROBE_0_DEBUG(s1394_compare_swap_exit, S1394_TNF_SL_ATREQ_STACK, ""); return (DDI_FAILURE); } mutex_enter(&hal->topology_tree_mutex); state = hal->hal_state; /* If this command was sent during a bus reset, */ /* then put it onto the pending Q. */ if (state == S1394_HAL_RESET) { /* Remove cmd from outstanding request Q */ s1394_remove_q_asynch_cmd(hal, cmd); /* Are we on the bus reset event stack? */ if (s1394_on_br_thread(hal) == B_TRUE) { /* Blocking commands are not allowed */ if (cmd->cmd_options & CMD1394_BLOCKING) { mutex_exit(&hal->topology_tree_mutex); s_priv->cmd_in_use = B_FALSE; cmd->cmd_result = CMD1394_EINVALID_CONTEXT; TNF_PROBE_1(s1394_compare_swap_error, S1394_TNF_SL_ATREQ_ERROR, "", tnf_string, msg, "CMD1394_BLOCKING in bus reset ctxt"); TNF_PROBE_0_DEBUG(s1394_compare_swap_exit, S1394_TNF_SL_ATREQ_STACK, ""); return (DDI_FAILURE); } } s1394_pending_q_insert(hal, cmd, S1394_PENDING_Q_FRONT); mutex_exit(&hal->topology_tree_mutex); /* Block (if necessary) */ s1394_block_on_asynch_cmd(cmd); TNF_PROBE_0_DEBUG(t1394_write_exit, S1394_TNF_SL_ATREQ_STACK, ""); return (DDI_SUCCESS); } mutex_exit(&hal->topology_tree_mutex); /* Send the command out */ ret = s1394_xfer_asynch_command(hal, cmd, &err); if (ret != DDI_SUCCESS) { if (err == CMD1394_ESTALE_GENERATION) { /* Remove cmd from outstanding request Q */ s1394_remove_q_asynch_cmd(hal, cmd); s1394_pending_q_insert(hal, cmd, S1394_PENDING_Q_FRONT); /* Block (if necessary) */ s1394_block_on_asynch_cmd(cmd); TNF_PROBE_0_DEBUG(s1394_compare_swap_exit, S1394_TNF_SL_ATREQ_STACK, ""); return (DDI_SUCCESS); } else { /* Remove cmd from outstanding request Q */ s1394_remove_q_asynch_cmd(hal, cmd); s_priv->cmd_in_use = B_FALSE; /* Copy error code into result */ cmd->cmd_result = err; TNF_PROBE_0(s1394_compare_swap_error_in_xfer, S1394_TNF_SL_ATREQ_ERROR, ""); TNF_PROBE_0_DEBUG(s1394_compare_swap_exit, S1394_TNF_SL_ATREQ_STACK, ""); return (DDI_FAILURE); } } else { /* Block (if necessary) */ s1394_block_on_asynch_cmd(cmd); TNF_PROBE_0_DEBUG(s1394_compare_swap_exit, S1394_TNF_SL_ATREQ_STACK, ""); return (DDI_SUCCESS); } } /* * s1394_split_lock_req() * is also used by t1394_lock() to send a lock request. The difference * is that s1394_split_lock_req() is used to send the software supported * lock types, i.e. bit_and, bit_or, etc. These lock requests require * more than one transaction, typically compare-swap's. */ int s1394_split_lock_req(s1394_hal_t *hal, s1394_target_t *target, cmd1394_cmd_t *cmd) { s1394_cmd_priv_t *s_priv; cmd1394_cmd_t *tmp_cmd; TNF_PROBE_0_DEBUG(s1394_split_lock_req_enter, S1394_TNF_SL_ATREQ_STACK, ""); /* Allocate a temporary command */ if (s1394_alloc_cmd(hal, T1394_ALLOC_CMD_NOSLEEP, &tmp_cmd) != DDI_SUCCESS) { cmd->cmd_result = CMD1394_EUNKNOWN_ERROR; TNF_PROBE_0(s1394_split_lock_req_error_alloc_cmd, S1394_TNF_SL_ATREQ_ERROR, ""); TNF_PROBE_0_DEBUG(s1394_split_lock_req_exit, S1394_TNF_SL_ATREQ_STACK, ""); return (DDI_FAILURE); } /* Get the Services Layer private area */ s_priv = S1394_GET_CMD_PRIV(tmp_cmd); tmp_cmd->completion_callback = s1394_handle_lock; tmp_cmd->cmd_callback_arg = (opaque_t)cmd; tmp_cmd->cmd_type = cmd->cmd_type; tmp_cmd->cmd_addr = cmd->cmd_addr; tmp_cmd->cmd_options = cmd->cmd_options; tmp_cmd->bus_generation = cmd->bus_generation; /* The temporary command can not block */ tmp_cmd->cmd_options = tmp_cmd->cmd_options & ~CMD1394_BLOCKING; /* Setup compare-swap with data_value == arg_value (read) */ if (tmp_cmd->cmd_type == CMD1394_ASYNCH_LOCK_32) { tmp_cmd->cmd_u.l32.data_value = 0; tmp_cmd->cmd_u.l32.arg_value = 0; tmp_cmd->cmd_u.l32.lock_type = CMD1394_LOCK_COMPARE_SWAP; s_priv->temp_num_retries = cmd->cmd_u.l32.num_retries; } else { tmp_cmd->cmd_u.l64.data_value = 0; tmp_cmd->cmd_u.l64.arg_value = 0; tmp_cmd->cmd_u.l64.lock_type = CMD1394_LOCK_COMPARE_SWAP; s_priv->temp_num_retries = cmd->cmd_u.l64.num_retries; } /* Initialize lock_req_step */ s_priv->lock_req_step = 0; /* Get the Services Layer private area for the target cmd */ s_priv = S1394_GET_CMD_PRIV(cmd); s_priv->cmd_in_use = B_TRUE; /* Send the request */ if (s1394_compare_swap(hal, target, tmp_cmd) != DDI_SUCCESS) { s_priv->cmd_in_use = B_FALSE; /* Free the temporary command */ if (s1394_free_cmd(hal, &tmp_cmd) != DDI_SUCCESS) cmd->cmd_result = CMD1394_EUNKNOWN_ERROR; TNF_PROBE_0_DEBUG(s1394_split_lock_req_exit, S1394_TNF_SL_ATREQ_STACK, ""); return (DDI_FAILURE); } /* Block (if necessary) */ s1394_block_on_asynch_cmd(cmd); TNF_PROBE_0_DEBUG(s1394_split_lock_req_exit, S1394_TNF_SL_ATREQ_STACK, ""); return (DDI_SUCCESS); } /* * s1394_handle_lock() * is the callback for s1394_split_lock_req(). It does all of the real * work. Based on the specific lock type all necessary manipulation is * performed and another compare swap is sent out. If the transaction * is unsuccessful, it is retried. */ static void s1394_handle_lock(cmd1394_cmd_t *cmd) { s1394_hal_t *to_hal; s1394_target_t *target; s1394_cmd_priv_t *s_priv; cmd1394_cmd_t *target_cmd; uint32_t lock_req_step; int tcmd_result; int ret; TNF_PROBE_0_DEBUG(s1394_handle_lock_enter, S1394_TNF_SL_ATREQ_STACK, ""); /* Get the Services Layer private area */ s_priv = S1394_GET_CMD_PRIV(cmd); lock_req_step = s_priv->lock_req_step; /* Get the target's command */ target_cmd = (cmd1394_cmd_t *)cmd->cmd_callback_arg; /* Get the destination of the command */ to_hal = s_priv->sent_on_hal; lock_req_step_0: /* Is this step 0 completing? */ if (lock_req_step == 0) { /* Was the request successful? */ if (cmd->cmd_result == CMD1394_CMDSUCCESS) { /* Do any math, bit ops, or byte-swapping necessary */ ret = s1394_process_split_lock(cmd, target_cmd); if (ret != DDI_SUCCESS) { tcmd_result = target_cmd->cmd_result; goto lock_req_done; } s_priv->lock_req_step = 1; target = s_priv->sent_by_target; if (s1394_compare_swap(to_hal, target, cmd) != DDI_SUCCESS) { tcmd_result = cmd->cmd_result; goto lock_req_done; } else { TNF_PROBE_0_DEBUG(s1394_handle_lock_exit, S1394_TNF_SL_ATREQ_STACK, ""); return; } } else { /* Command failed for some reason */ tcmd_result = cmd->cmd_result; goto lock_req_done; } } else { /* lock_req_step == 1 */ /* Was the request successful? */ if (cmd->cmd_result == CMD1394_CMDSUCCESS) { /* Do whatever's necessary to finish up the lock */ ret = s1394_finish_split_lock(cmd, target_cmd); if (ret != DDI_SUCCESS) { lock_req_step = 0; goto lock_req_step_0; } else { tcmd_result = cmd->cmd_result; goto lock_req_done; } } else { /* Command failed for some reason */ tcmd_result = cmd->cmd_result; goto lock_req_done; } } lock_req_done: if (s1394_free_cmd(to_hal, &cmd) != DDI_SUCCESS) { TNF_PROBE_0(s1394_handle_lock_error_in_freecmd, S1394_TNF_SL_ATREQ_ERROR, ""); } /* Get the Services Layer private area */ s_priv = S1394_GET_CMD_PRIV(target_cmd); s_priv->cmd_in_use = B_FALSE; target_cmd->cmd_result = tcmd_result; /* Is this a blocking command? */ if (target_cmd->cmd_options & CMD1394_BLOCKING) { /* Unblock the waiting command */ mutex_enter(&s_priv->blocking_mutex); s_priv->blocking_flag = B_TRUE; cv_signal(&s_priv->blocking_cv); mutex_exit(&s_priv->blocking_mutex); TNF_PROBE_0_DEBUG(s1394_handle_lock_exit, S1394_TNF_SL_ATREQ_STACK, ""); return; } /* Call the target's completion_callback() */ if (target_cmd->completion_callback != NULL) target_cmd->completion_callback(target_cmd); TNF_PROBE_0_DEBUG(s1394_handle_lock_exit, S1394_TNF_SL_ATREQ_STACK, ""); } /* * s1394_pending_q_insert() * is used to insert a given command structure onto a HAL's pending queue * for later processing (after the bus reset). All commands returned by * the HAL, are inserted onto the rear of the list (first priority), and * all other commands (from targets during bus reset) are put onto the front. */ void s1394_pending_q_insert(s1394_hal_t *hal, cmd1394_cmd_t *cmd, uint_t flags) { cmd1394_cmd_t *temp_cmd; s1394_cmd_priv_t *s_priv; s1394_cmd_priv_t *c_priv; TNF_PROBE_0_DEBUG(s1394_pending_q_insert_enter, S1394_TNF_SL_ATREQ_STACK, ""); mutex_enter(&hal->pending_q_mutex); /* Get the Services Layer private area */ s_priv = S1394_GET_CMD_PRIV(cmd); /* Is the outstanding request queue empty? */ if ((hal->pending_q_head == NULL) && (hal->pending_q_tail == NULL)) { hal->pending_q_head = (cmd1394_cmd_t *)cmd; hal->pending_q_tail = (cmd1394_cmd_t *)cmd; s_priv->cmd_priv_next = (cmd1394_cmd_t *)NULL; s_priv->cmd_priv_prev = (cmd1394_cmd_t *)NULL; } else if (flags == S1394_PENDING_Q_FRONT) { s_priv->cmd_priv_next = hal->pending_q_head; s_priv->cmd_priv_prev = (cmd1394_cmd_t *)NULL; temp_cmd = (cmd1394_cmd_t *)hal->pending_q_head; c_priv = (s1394_cmd_priv_t *)((uchar_t *)temp_cmd + sizeof (cmd1394_cmd_t)); c_priv->cmd_priv_prev = (cmd1394_cmd_t *)cmd; hal->pending_q_head = (cmd1394_cmd_t *)cmd; } else { s_priv->cmd_priv_prev = hal->pending_q_tail; s_priv->cmd_priv_next = (cmd1394_cmd_t *)NULL; temp_cmd = (cmd1394_cmd_t *)hal->pending_q_tail; c_priv = (s1394_cmd_priv_t *)((uchar_t *)temp_cmd + sizeof (cmd1394_cmd_t)); c_priv->cmd_priv_next = (cmd1394_cmd_t *)cmd; hal->pending_q_tail = (cmd1394_cmd_t *)cmd; } mutex_exit(&hal->pending_q_mutex); /* kstats - number of pending Q insertions */ hal->hal_kstats->pending_q_insert++; TNF_PROBE_0_DEBUG(s1394_pending_q_insert_exit, S1394_TNF_SL_ATREQ_STACK, ""); } /* * s1394_pending_q_remove() * is used to remove a command structure from a HAL's pending queue for * processing. */ static cmd1394_cmd_t * s1394_pending_q_remove(s1394_hal_t *hal) { s1394_cmd_priv_t *s_priv; s1394_cmd_priv_t *c_priv; cmd1394_cmd_t *cmd; cmd1394_cmd_t *prev_cmd; TNF_PROBE_0_DEBUG(s1394_pending_q_remove_enter, S1394_TNF_SL_ATREQ_STACK, ""); mutex_enter(&hal->pending_q_mutex); cmd = (cmd1394_cmd_t *)hal->pending_q_tail; if (cmd == NULL) { mutex_exit(&hal->pending_q_mutex); TNF_PROBE_0_DEBUG(s1394_pending_q_remove_exit, S1394_TNF_SL_ATREQ_STACK, ""); return (NULL); } /* Get the Services Layer private area */ s_priv = S1394_GET_CMD_PRIV(cmd); prev_cmd = (cmd1394_cmd_t *)s_priv->cmd_priv_prev; s_priv->cmd_priv_prev = (cmd1394_cmd_t *)NULL; s_priv->cmd_priv_next = (cmd1394_cmd_t *)NULL; if (prev_cmd != NULL) { c_priv = (s1394_cmd_priv_t *)((uchar_t *)prev_cmd + sizeof (cmd1394_cmd_t)); c_priv->cmd_priv_next = (cmd1394_cmd_t *)NULL; } else { hal->pending_q_head = (cmd1394_cmd_t *)NULL; } hal->pending_q_tail = (cmd1394_cmd_t *)prev_cmd; mutex_exit(&hal->pending_q_mutex); TNF_PROBE_0_DEBUG(s1394_pending_q_remove_exit, S1394_TNF_SL_ATREQ_STACK, ""); return (cmd); } /* * s1394_resend_pending_cmds() * is called when the pending queue is to be flushed. After most of the * bus reset processing is completed, the pending commands are sent/resent. */ void s1394_resend_pending_cmds(s1394_hal_t *hal) { int done; TNF_PROBE_0_DEBUG(s1394_resend_pending_cmds_enter, S1394_TNF_SL_BR_STACK, ""); ASSERT(MUTEX_NOT_HELD(&hal->topology_tree_mutex)); do { done = s1394_process_pending_q(hal); } while (done == B_FALSE); ASSERT(MUTEX_NOT_HELD(&hal->topology_tree_mutex)); TNF_PROBE_0_DEBUG(s1394_resend_pending_cmds_exit, S1394_TNF_SL_BR_STACK, ""); } /* * s1394_process_pending_q() * is called to send/resend the commands on the pending queue. All command * handling can be done here, including notifying the target of failed * commands, etc. If it is necessary to recompute the address, speed, * or max_payload for a command, that can be done here too. And if there * is no reason not to continue sending commands from the pending queue, * then a B_FALSE is returned, else B_TRUE is returned. */ static boolean_t s1394_process_pending_q(s1394_hal_t *hal) { s1394_cmd_priv_t *s_priv; h1394_cmd_priv_t *h_priv; s1394_target_t *target; cmd1394_cmd_t *cmd; uint64_t node; uint32_t from_node; uint32_t to_node; uint_t current_max_payload; int ret; TNF_PROBE_0_DEBUG(s1394_process_pending_q_enter, S1394_TNF_SL_BR_STACK, ""); ASSERT(MUTEX_NOT_HELD(&hal->topology_tree_mutex)); /* Pull a command from the Pending Q */ cmd = s1394_pending_q_remove(hal); if (cmd == NULL) { TNF_PROBE_0_DEBUG(s1394_process_pending_q_exit, S1394_TNF_SL_BR_STACK, ""); return (B_TRUE); } /* Get the Services Layer private area */ s_priv = S1394_GET_CMD_PRIV(cmd); /* Get a pointer to the HAL private struct */ h_priv = (h1394_cmd_priv_t *)&s_priv->hal_cmd_private; if ((cmd->cmd_options & CMD1394_OVERRIDE_ADDR) || (cmd->cmd_options & CMD1394_CANCEL_ON_BUS_RESET)) { if (h_priv->bus_generation == hal->generation_count) { ret = s1394_pending_q_helper(hal, cmd); return (ret); } else { s_priv->cmd_in_use = B_FALSE; cmd->cmd_result = CMD1394_EBUSRESET; /* Is this a blocking command? */ if (cmd->cmd_options & CMD1394_BLOCKING) { /* Unblock the waiting command */ mutex_enter(&s_priv->blocking_mutex); s_priv->blocking_flag = B_TRUE; cv_signal(&s_priv->blocking_cv); mutex_exit(&s_priv->blocking_mutex); TNF_PROBE_0_DEBUG(s1394_process_pending_q_exit, S1394_TNF_SL_BR_STACK, ""); return (B_FALSE); } /* Call the target's completion_callback() */ if (cmd->completion_callback != NULL) { cmd->completion_callback(cmd); } TNF_PROBE_0_DEBUG(s1394_process_pending_q_exit, S1394_TNF_SL_BR_STACK, ""); return (B_FALSE); } } else { if (h_priv->bus_generation == hal->generation_count) { ret = s1394_pending_q_helper(hal, cmd); return (ret); } else { /* Make sure we can get the topology_tree_mutex */ if (s1394_lock_tree(hal) != DDI_SUCCESS) return (B_TRUE); /* Set the generation */ cmd->bus_generation = hal->generation_count; /* Copy the generation into the HAL's private field */ h_priv->bus_generation = cmd->bus_generation; target = s_priv->sent_by_target; /* If not OVERRIDE_ADDR, then target may not be NULL */ ASSERT(target != NULL); rw_enter(&hal->target_list_rwlock, RW_READER); if (((target->target_state & S1394_TARG_GONE) == 0) && (target->on_node != NULL)) { node = target->on_node->node_num; rw_exit(&hal->target_list_rwlock); } else { rw_exit(&hal->target_list_rwlock); s_priv->cmd_in_use = B_FALSE; cmd->cmd_result = CMD1394_EDEVICE_REMOVED; /* Is this a blocking command? */ if (cmd->cmd_options & CMD1394_BLOCKING) { s1394_unlock_tree(hal); /* Unblock the waiting command */ mutex_enter(&s_priv->blocking_mutex); s_priv->blocking_flag = B_TRUE; cv_signal(&s_priv->blocking_cv); mutex_exit(&s_priv->blocking_mutex); TNF_PROBE_0_DEBUG( s1394_process_pending_q_exit, S1394_TNF_SL_BR_STACK, ""); return (B_FALSE); } /* Call the target's completion_callback() */ if (cmd->completion_callback != NULL) { s1394_unlock_tree(hal); cmd->completion_callback(cmd); TNF_PROBE_0_DEBUG( s1394_process_pending_q_exit, S1394_TNF_SL_BR_STACK, ""); return (B_FALSE); } else { s1394_unlock_tree(hal); TNF_PROBE_0_DEBUG( s1394_process_pending_q_exit, S1394_TNF_SL_BR_STACK, ""); return (B_FALSE); } } /* Mask in the top 16-bits */ cmd->cmd_addr = cmd->cmd_addr & IEEE1394_ADDR_OFFSET_MASK; cmd->cmd_addr = cmd->cmd_addr | (node << IEEE1394_ADDR_PHY_ID_SHIFT); cmd->cmd_addr = cmd->cmd_addr | IEEE1394_ADDR_BUS_ID_MASK; /* Speed is to be filled in from speed map */ from_node = IEEE1394_NODE_NUM(hal->node_id); to_node = (uint32_t)node; /* Fill in the nodeID */ cmd->nodeID = (cmd->cmd_addr & IEEE1394_ADDR_NODE_ID_MASK) >> IEEE1394_ADDR_NODE_ID_SHIFT; if (cmd->cmd_options & CMD1394_OVERRIDE_SPEED) { s_priv->hal_cmd_private.speed = (int)cmd->cmd_speed; } else { /* Speed is to be filled in from speed map */ s_priv->hal_cmd_private.speed = (int)s1394_speed_map_get(hal, from_node, to_node); } /* Is it a block request? */ if ((cmd->cmd_type == CMD1394_ASYNCH_RD_BLOCK) || (cmd->cmd_type == CMD1394_ASYNCH_WR_BLOCK)) { /* Get a pointer to the HAL private struct */ h_priv = (h1394_cmd_priv_t *)&s_priv-> hal_cmd_private; /* Handle the MAX_PAYLOAD size */ if (s_priv->sent_by_target != NULL) { current_max_payload = s_priv->sent_by_target-> current_max_payload; } else { current_max_payload = 4; } if (cmd->cmd_options & CMD1394_OVERRIDE_MAX_PAYLOAD) { if (current_max_payload > cmd->cmd_u.b.max_payload) current_max_payload = cmd->cmd_u.b.max_payload; } if (s_priv->data_remaining < current_max_payload) { h_priv->mblk.length = s_priv->data_remaining; } else { h_priv->mblk.length = current_max_payload; } } s1394_unlock_tree(hal); ret = s1394_pending_q_helper(hal, cmd); TNF_PROBE_0_DEBUG(s1394_process_pending_q_exit, S1394_TNF_SL_BR_STACK, ""); return (ret); } } } /* * s1394_pending_q_helper() * is a "helper" function for s1394_process_pending_q(). It attempts to * resend commands, handling error conditions whenever necessary. */ static boolean_t s1394_pending_q_helper(s1394_hal_t *hal, cmd1394_cmd_t *cmd) { s1394_cmd_priv_t *s_priv; int err; int ret; TNF_PROBE_0_DEBUG(s1394_pending_q_helper_enter, S1394_TNF_SL_BR_STACK, ""); ASSERT(MUTEX_NOT_HELD(&hal->topology_tree_mutex)); /* Get the Services Layer private area */ s_priv = S1394_GET_CMD_PRIV(cmd); /* Put cmd on outstanding request Q */ s1394_insert_q_asynch_cmd(hal, cmd); /* Send command out again */ ret = s1394_xfer_asynch_command(hal, cmd, &err); if (ret != DDI_SUCCESS) { if (err == CMD1394_ESTALE_GENERATION) { /* Remove cmd outstanding req Q */ s1394_remove_q_asynch_cmd(hal, cmd); s1394_pending_q_insert(hal, cmd, S1394_PENDING_Q_FRONT); TNF_PROBE_0_DEBUG(s1394_pending_q_helper_exit, S1394_TNF_SL_BR_STACK, ""); return (B_TRUE); } else { /* Remove cmd from outstanding request Q */ s1394_remove_q_asynch_cmd(hal, cmd); s_priv->cmd_in_use = B_FALSE; cmd->cmd_result = err; /* Is this a blocking command? */ if (cmd->cmd_options & CMD1394_BLOCKING) { /* Unblock waiting command */ mutex_enter(&s_priv->blocking_mutex); s_priv->blocking_flag = B_TRUE; cv_signal(&s_priv->blocking_cv); mutex_exit(&s_priv->blocking_mutex); TNF_PROBE_0_DEBUG(s1394_pending_q_helper_exit, S1394_TNF_SL_BR_STACK, ""); return (B_FALSE); } /* Call target completion_callback() */ if (cmd->completion_callback != NULL) { cmd->completion_callback(cmd); TNF_PROBE_0_DEBUG(s1394_pending_q_helper_exit, S1394_TNF_SL_BR_STACK, ""); return (B_FALSE); } else { TNF_PROBE_0_DEBUG(s1394_pending_q_helper_exit, S1394_TNF_SL_BR_STACK, ""); return (B_FALSE); } } } TNF_PROBE_0_DEBUG(s1394_pending_q_helper_exit, S1394_TNF_SL_BR_STACK, ""); return (B_FALSE); } /* * s1394_process_split_lock() * is a "helper" function for the s1394_handle_lock() callback. Its * job is to perform whatever manipulation is required for the given * request. */ static int s1394_process_split_lock(cmd1394_cmd_t *cmd, cmd1394_cmd_t *target_cmd) { uint64_t new_value64; uint64_t data_value64; uint64_t arg_value64; uint64_t old_value64; uint64_t temp_value64; uint32_t new_value32; uint32_t data_value32; uint32_t arg_value32; uint32_t old_value32; uint32_t temp_value32; TNF_PROBE_0_DEBUG(s1394_process_split_lock_enter, S1394_TNF_SL_ATREQ_STACK, ""); if (cmd->cmd_type == CMD1394_ASYNCH_LOCK_32) { old_value32 = cmd->cmd_u.l32.old_value; data_value32 = target_cmd->cmd_u.l32.data_value; arg_value32 = target_cmd->cmd_u.l32.arg_value; /* Lock type specific */ switch (target_cmd->cmd_u.l32.lock_type) { case CMD1394_LOCK_BIT_AND: new_value32 = old_value32 & data_value32; break; case CMD1394_LOCK_BIT_OR: new_value32 = old_value32 | data_value32; break; case CMD1394_LOCK_BIT_XOR: new_value32 = old_value32 ^ data_value32; break; case CMD1394_LOCK_INCREMENT: old_value32 = T1394_DATA32(old_value32); new_value32 = old_value32 + 1; new_value32 = T1394_DATA32(new_value32); old_value32 = T1394_DATA32(old_value32); break; case CMD1394_LOCK_DECREMENT: old_value32 = T1394_DATA32(old_value32); new_value32 = old_value32 - 1; new_value32 = T1394_DATA32(new_value32); old_value32 = T1394_DATA32(old_value32); break; case CMD1394_LOCK_ADD: old_value32 = T1394_DATA32(old_value32); new_value32 = old_value32 + data_value32; new_value32 = T1394_DATA32(new_value32); old_value32 = T1394_DATA32(old_value32); break; case CMD1394_LOCK_SUBTRACT: old_value32 = T1394_DATA32(old_value32); new_value32 = old_value32 - data_value32; new_value32 = T1394_DATA32(new_value32); old_value32 = T1394_DATA32(old_value32); break; case CMD1394_LOCK_THRESH_ADD: old_value32 = T1394_DATA32(old_value32); temp_value32 = (old_value32 + data_value32); if ((temp_value32 >= old_value32) && (temp_value32 <= arg_value32)) { new_value32 = T1394_DATA32(temp_value32); old_value32 = T1394_DATA32(old_value32); } else { /* Failed threshold add */ target_cmd->cmd_u.l32.old_value = T1394_DATA32(cmd->cmd_u.l32.old_value); target_cmd->cmd_result = CMD1394_CMDSUCCESS; TNF_PROBE_0_DEBUG( s1394_process_split_lock_exit, S1394_TNF_SL_ATREQ_STACK, ""); return (DDI_FAILURE); } break; case CMD1394_LOCK_THRESH_SUBTRACT: old_value32 = T1394_DATA32(old_value32); temp_value32 = (old_value32 - data_value32); if ((old_value32 >= data_value32) && (temp_value32 >= arg_value32)) { new_value32 = T1394_DATA32(temp_value32); old_value32 = T1394_DATA32(old_value32); } else { /* Failed threshold subtract */ target_cmd->cmd_u.l32.old_value = T1394_DATA32(cmd->cmd_u.l32.old_value); target_cmd->cmd_result = CMD1394_CMDSUCCESS; TNF_PROBE_0_DEBUG( s1394_process_split_lock_exit, S1394_TNF_SL_ATREQ_STACK, ""); return (DDI_FAILURE); } break; case CMD1394_LOCK_CLIP_ADD: old_value32 = T1394_DATA32(old_value32); temp_value32 = (old_value32 + data_value32); if ((temp_value32 < old_value32) || (temp_value32 > arg_value32)) new_value32 = T1394_DATA32(arg_value32); else new_value32 = T1394_DATA32(temp_value32); old_value32 = T1394_DATA32(old_value32); break; case CMD1394_LOCK_CLIP_SUBTRACT: old_value32 = T1394_DATA32(old_value32); temp_value32 = (old_value32 - data_value32); if ((data_value32 > old_value32) || (temp_value32 < arg_value32)) new_value32 = T1394_DATA32(arg_value32); else new_value32 = T1394_DATA32(temp_value32); old_value32 = T1394_DATA32(old_value32); break; } /* Send compare-swap lock request */ cmd->cmd_u.l32.arg_value = old_value32; cmd->cmd_u.l32.data_value = new_value32; } else { old_value64 = cmd->cmd_u.l64.old_value; data_value64 = target_cmd->cmd_u.l64.data_value; arg_value64 = target_cmd->cmd_u.l64.arg_value; /* Lock type specific */ switch (target_cmd->cmd_u.l64.lock_type) { case CMD1394_LOCK_BIT_AND: new_value64 = old_value64 & data_value64; break; case CMD1394_LOCK_BIT_OR: new_value64 = old_value64 | data_value64; break; case CMD1394_LOCK_BIT_XOR: new_value64 = old_value64 ^ data_value64; break; case CMD1394_LOCK_INCREMENT: old_value64 = T1394_DATA64(old_value64); new_value64 = old_value64 + 1; new_value64 = T1394_DATA64(new_value64); old_value64 = T1394_DATA64(old_value64); break; case CMD1394_LOCK_DECREMENT: old_value64 = T1394_DATA64(old_value64); new_value64 = old_value64 - 1; new_value64 = T1394_DATA64(new_value64); old_value64 = T1394_DATA64(old_value64); break; case CMD1394_LOCK_ADD: old_value64 = T1394_DATA64(old_value64); new_value64 = old_value64 + data_value64; new_value64 = T1394_DATA64(new_value64); old_value64 = T1394_DATA64(old_value64); break; case CMD1394_LOCK_SUBTRACT: old_value64 = T1394_DATA64(old_value64); new_value64 = old_value64 - data_value64; new_value64 = T1394_DATA64(new_value64); old_value64 = T1394_DATA64(old_value64); break; case CMD1394_LOCK_THRESH_ADD: old_value64 = T1394_DATA64(old_value64); temp_value64 = (old_value64 + data_value64); if ((temp_value64 >= old_value64) && (temp_value64 <= arg_value64)) { new_value64 = T1394_DATA64(temp_value64); old_value64 = T1394_DATA64(old_value64); } else { /* Failed threshold add */ target_cmd->cmd_u.l64.old_value = T1394_DATA64(cmd->cmd_u.l64.old_value); target_cmd->cmd_result = CMD1394_CMDSUCCESS; TNF_PROBE_0_DEBUG( s1394_process_split_lock_exit, S1394_TNF_SL_ATREQ_STACK, ""); return (DDI_FAILURE); } break; case CMD1394_LOCK_THRESH_SUBTRACT: old_value64 = T1394_DATA64(old_value64); temp_value64 = (old_value64 - data_value64); if ((old_value64 >= data_value64) && (temp_value64 >= arg_value64)) { new_value64 = T1394_DATA64(temp_value64); old_value64 = T1394_DATA64(old_value64); } else { /* Failed threshold subtract */ target_cmd->cmd_u.l64.old_value = T1394_DATA64(cmd->cmd_u.l64.old_value); target_cmd->cmd_result = CMD1394_CMDSUCCESS; TNF_PROBE_0_DEBUG( s1394_process_split_lock_exit, S1394_TNF_SL_ATREQ_STACK, ""); return (DDI_FAILURE); } break; case CMD1394_LOCK_CLIP_ADD: old_value64 = T1394_DATA64(old_value64); temp_value64 = (old_value64 + data_value64); if ((temp_value64 < old_value64) || (temp_value64 > arg_value64)) new_value64 = T1394_DATA64(arg_value64); else new_value64 = T1394_DATA64(temp_value64); old_value64 = T1394_DATA64(old_value64); break; case CMD1394_LOCK_CLIP_SUBTRACT: old_value64 = T1394_DATA64(old_value64); temp_value64 = (old_value64 - data_value64); if ((data_value64 > old_value64) || (temp_value64 < arg_value64)) new_value64 = T1394_DATA64(arg_value64); else new_value64 = T1394_DATA64(temp_value64); old_value64 = T1394_DATA64(old_value64); break; } /* Send compare-swap lock request */ cmd->cmd_u.l64.arg_value = old_value64; cmd->cmd_u.l64.data_value = new_value64; } TNF_PROBE_0_DEBUG(s1394_process_split_lock_exit, S1394_TNF_SL_ATREQ_STACK, ""); return (DDI_SUCCESS); } /* * s1394_finish_split_lock() * is another "helper" function for the s1394_handle_lock() callback. * Its job is to finish up whatever lock request procesing is necessary. */ static int s1394_finish_split_lock(cmd1394_cmd_t *cmd, cmd1394_cmd_t *target_cmd) { s1394_cmd_priv_t *s_priv; uint64_t tmp_value64; uint32_t tmp_value32; TNF_PROBE_0_DEBUG(s1394_finish_split_lock_enter, S1394_TNF_SL_ATREQ_STACK, ""); /* Get the Services Layer private area */ s_priv = S1394_GET_CMD_PRIV(cmd); if (((cmd->cmd_type == CMD1394_ASYNCH_LOCK_32) && (cmd->cmd_u.l32.old_value == cmd->cmd_u.l32.arg_value)) || ((cmd->cmd_type == CMD1394_ASYNCH_LOCK_64) && (cmd->cmd_u.l64.old_value == cmd->cmd_u.l64.arg_value))) { if (cmd->cmd_type == CMD1394_ASYNCH_LOCK_32) { switch (cmd->cmd_u.l32.lock_type) { case CMD1394_LOCK_INCREMENT: case CMD1394_LOCK_DECREMENT: case CMD1394_LOCK_ADD: case CMD1394_LOCK_SUBTRACT: case CMD1394_LOCK_THRESH_ADD: case CMD1394_LOCK_THRESH_SUBTRACT: case CMD1394_LOCK_CLIP_ADD: case CMD1394_LOCK_CLIP_SUBTRACT: tmp_value32 = cmd->cmd_u.l32.old_value; tmp_value32 = T1394_DATA32(tmp_value32); target_cmd->cmd_u.l32.old_value = tmp_value32; break; default: tmp_value32 = cmd->cmd_u.l32.old_value; target_cmd->cmd_u.l32.old_value = tmp_value32; break; } } else { switch (cmd->cmd_u.l64.lock_type) { case CMD1394_LOCK_INCREMENT: case CMD1394_LOCK_DECREMENT: case CMD1394_LOCK_ADD: case CMD1394_LOCK_SUBTRACT: case CMD1394_LOCK_THRESH_ADD: case CMD1394_LOCK_THRESH_SUBTRACT: case CMD1394_LOCK_CLIP_ADD: case CMD1394_LOCK_CLIP_SUBTRACT: tmp_value64 = cmd->cmd_u.l64.old_value; tmp_value64 = T1394_DATA64(tmp_value64); target_cmd->cmd_u.l64.old_value = tmp_value64; break; default: tmp_value64 = cmd->cmd_u.l64.old_value; target_cmd->cmd_u.l64.old_value = tmp_value64; break; } } /* Set status */ target_cmd->cmd_result = CMD1394_CMDSUCCESS; TNF_PROBE_0_DEBUG(s1394_finish_split_lock_exit, S1394_TNF_SL_ATREQ_STACK, ""); return (DDI_SUCCESS); } else { if (s_priv->temp_num_retries > 0) { /* Decrement retry count */ s_priv->temp_num_retries--; /* Reset lock_req_step */ s_priv->lock_req_step = 0; TNF_PROBE_0_DEBUG(s1394_finish_split_lock_start_over, S1394_TNF_SL_ATREQ_STACK, ""); /* Resend... start at step 0 again */ TNF_PROBE_0_DEBUG(s1394_finish_split_lock_exit, S1394_TNF_SL_ATREQ_STACK, ""); return (DDI_FAILURE); } else { /* Failed... RETRIES_EXCEEDED */ target_cmd->cmd_result = CMD1394_ERETRIES_EXCEEDED; TNF_PROBE_0_DEBUG(s1394_finish_split_lock_exit, S1394_TNF_SL_ATREQ_STACK, ""); return (DDI_SUCCESS); } } }