/*- * This file is provided under a dual BSD/GPLv2 license. When using or * redistributing this file, you may do so under either license. * * GPL LICENSE SUMMARY * * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of version 2 of the GNU General Public License as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. * The full GNU General Public License is included in this distribution * in the file called LICENSE.GPL. * * BSD LICENSE * * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include __FBSDID("$FreeBSD$"); /** * @file * @brief This file contains the method implementations required to * translate the SCSI unmap command. */ #if !defined(DISABLE_SATI_UNMAP) #include #include #include #include #include #include #include //****************************************************************************** //* P R I V A T E M E T H O D S //****************************************************************************** /** * @brief This method translates a given number of DSM * requests into DSM blocks based on the devices logical block size * * @return Number of DSM blocks required for the DSM descriptor count */ U32 sati_unmap_calculate_dsm_blocks( SATI_TRANSLATOR_SEQUENCE_T * sequence, U32 dsm_descriptor_count ) { U32 blocks = (dsm_descriptor_count * sizeof(TRIM_PAIR))/sequence->device->logical_block_size; if ((dsm_descriptor_count * sizeof(TRIM_PAIR)) % sequence->device->logical_block_size) { blocks++; } return blocks; } /** * @brief This method performs the SCSI Unmap command translation * functionality. * This includes: * - setting the command register * - setting the device head register * - filling in fields in the SATI_TRANSLATOR_SEQUENCE object. * For more information on the parameters passed to this method, * please reference sati_translate_command(). * * @return Indicate if the method was successfully completed. * @retval SATI_SUCCESS This is returned in all other cases. */ SATI_STATUS sati_unmap_construct( SATI_TRANSLATOR_SEQUENCE_T * sequence, void * scsi_io, void * ata_io, U32 sector_count ) { U8 * h2d_register_fis = sati_cb_get_h2d_register_fis_address(ata_io); U8 * d2h_register_fis = sati_cb_get_d2h_register_fis_address(ata_io); sati_set_ata_command(h2d_register_fis, ATA_DATA_SET_MANAGEMENT); sati_set_ata_features(h2d_register_fis, 0x01); sati_set_ata_sector_count(h2d_register_fis, (U8)sector_count); sati_set_ata_device_head(h2d_register_fis, ATA_DEV_HEAD_REG_LBA_MODE_ENABLE); // Set the completion status since the core will not do that for // the udma fast path. sati_set_ata_status(d2h_register_fis, 0x00); // Set up the direction and protocol for SCIC sequence->data_direction = SATI_DATA_DIRECTION_OUT; sequence->protocol = SAT_PROTOCOL_UDMA_DATA_OUT; // The UNMAP translation will always require a callback // on every response so it can free memory if an error // occurs. sequence->is_translate_response_required = TRUE; ASSERT(sector_count < 0x100); return SATI_SUCCESS; } /** * @brief This method updates the unmap sequence state to the next * unmap descriptor * * @return Indicate if the method was successfully completed. * @retval SATI_SUCCESS This is returned in all other cases. */ SATI_STATUS sati_unmap_load_next_descriptor( SATI_TRANSLATOR_SEQUENCE_T * sequence, void * scsi_io ) { SATI_UNMAP_PROCESSING_STATE_T * unmap_process_state; U32 index; U8 unmap_block_descriptor[16]; unmap_process_state = &sequence->command_specific_data.unmap_process_state; // Load the next descriptor for(index = unmap_process_state->current_unmap_block_descriptor_index; index < unmap_process_state->current_unmap_block_descriptor_index + SATI_UNMAP_SIZEOF_SCSI_UNMAP_BLOCK_DESCRIPTOR; index++) { sati_get_data_byte(sequence, scsi_io, index, &unmap_block_descriptor[index-unmap_process_state->current_unmap_block_descriptor_index]); } // Update the internal state for the next translation pass unmap_process_state->current_lba_count = (unmap_block_descriptor[8] << 24) | (unmap_block_descriptor[9] << 16) | (unmap_block_descriptor[10] << 8) | (unmap_block_descriptor[11]); unmap_process_state->current_lba = ((SATI_LBA)(unmap_block_descriptor[0]) << 56) | ((SATI_LBA)(unmap_block_descriptor[1]) << 48) | ((SATI_LBA)(unmap_block_descriptor[2]) << 40) | ((SATI_LBA)(unmap_block_descriptor[3]) << 32) | ((SATI_LBA)(unmap_block_descriptor[4]) << 24) | ((SATI_LBA)(unmap_block_descriptor[5]) << 16) | ((SATI_LBA)(unmap_block_descriptor[6]) << 8) | ((SATI_LBA)(unmap_block_descriptor[7])); unmap_process_state->next_lba = 0; // Update the index for the next descriptor to translate unmap_process_state->current_unmap_block_descriptor_index += SATI_UNMAP_SIZEOF_SCSI_UNMAP_BLOCK_DESCRIPTOR; return SATI_SUCCESS; } /** * @brief This method determines the max number of blocks of DSM data * that can be satisfied by the device and the SW * * @return Number of blocks supported * @retval Number of blocks supported */ U32 sati_unmap_get_max_buffer_size_in_blocks( SATI_TRANSLATOR_SEQUENCE_T * sequence ) { // Currently this SATI implementation only supports a single // 4k block of memory for the DMA write operation for simplicity // (no need to handle more than one SG element). // Since most run time UNMAP requests use 1K or less buffer space, // there is no performance degradation with only supporting a // single physical page. For best results allocate the maximum // amount of memory the device can handle up to the maximum of 4K. return MIN(SATI_DSM_MAX_BUFFER_SIZE/sequence->device->logical_block_size, sequence->device->max_lba_range_entry_blocks); } /** * @brief This method will be called before starting the first unmap translation * * @return Indicate if the translation was successful. * @retval SATI_SUCCESS This is returned if the command translation was * successful and no further processing. * @retval SATI_COMPLETE - The initial processing was completed successfully * @retval SATI_FAILURE_CHECK_RESPONSE_DATA - Failed the initial processing */ SATI_STATUS sati_unmap_initial_processing( SATI_TRANSLATOR_SEQUENCE_T * sequence, void * scsi_io, void * ata_io ) { SATI_UNMAP_PROCESSING_STATE_T * unmap_process_state; U8 * cdb; U16 unmap_length; U32 descriptor_length; U32 index; U32 max_dsm_blocks; U8 unmap_param_list[8]; unmap_process_state = &sequence->command_specific_data.unmap_process_state; // Set up the sequence type for unmap translation sequence->type = SATI_SEQUENCE_UNMAP; // Make sure the device is TRIM capable if ((sequence->device->capabilities & SATI_DEVICE_CAP_DSM_TRIM_SUPPORT) != SATI_DEVICE_CAP_DSM_TRIM_SUPPORT) { // Can't send TRIM request to device that does not support it sati_scsi_sense_data_construct( sequence, scsi_io, SCSI_STATUS_CHECK_CONDITION, SCSI_SENSE_ILLEGAL_REQUEST, SCSI_ASC_INVALID_FIELD_IN_CDB, SCSI_ASCQ_INVALID_FIELD_IN_CDB ); return SATI_FAILURE_CHECK_RESPONSE_DATA; } // get the amount of data being sent from the cdb cdb = sati_cb_get_cdb_address(scsi_io); unmap_length = (sati_get_cdb_byte(cdb, 7) << 8) | sati_get_cdb_byte(cdb, 8); // If nothing has been requested return success now. if (unmap_length == 0) { // SAT: This is not an error return SATI_SUCCESS; } if (unmap_length < SATI_UNMAP_SIZEOF_SCSI_UNMAP_PARAMETER_LIST) { // Not enough length specified in the CDB sati_scsi_sense_data_construct( sequence, scsi_io, SCSI_STATUS_CHECK_CONDITION, SCSI_SENSE_ILLEGAL_REQUEST, SCSI_ASC_INVALID_FIELD_IN_CDB, SCSI_ASCQ_INVALID_FIELD_IN_CDB ); return SATI_FAILURE_CHECK_RESPONSE_DATA; } sequence->allocation_length = unmap_length; // Get the unmap parameter header for(index = 0; index < SATI_UNMAP_SIZEOF_SCSI_UNMAP_PARAMETER_LIST; index++) { sati_get_data_byte(sequence, scsi_io, index, &unmap_param_list[index]); } descriptor_length = (unmap_param_list[2] << 8) | unmap_param_list[3]; // Check length again if (descriptor_length == 0) { // SAT: This is not an error return SATI_SUCCESS; } if ((U32)(unmap_length - SATI_UNMAP_SIZEOF_SCSI_UNMAP_PARAMETER_LIST) < descriptor_length) { // Not enough length specified in the CDB sati_scsi_sense_data_construct( sequence, scsi_io, SCSI_STATUS_CHECK_CONDITION, SCSI_SENSE_ILLEGAL_REQUEST, SCSI_ASC_INVALID_FIELD_IN_CDB, SCSI_ASCQ_INVALID_FIELD_IN_CDB ); return SATI_FAILURE_CHECK_RESPONSE_DATA; } // Save the maximum unmap block descriptors in this request unmap_process_state->max_unmap_block_descriptors = descriptor_length/SATI_UNMAP_SIZEOF_SCSI_UNMAP_BLOCK_DESCRIPTOR; // Determine the maximum size of the write buffer that will be required // for the translation in terms of number of blocks max_dsm_blocks = sati_unmap_get_max_buffer_size_in_blocks(sequence); // Save the maximum number of DSM descriptors we can send during the translation unmap_process_state->max_lba_range_entries = (max_dsm_blocks*sequence->device->logical_block_size)/sizeof(TRIM_PAIR); // Get the write buffer for the translation sati_cb_allocate_dma_buffer( scsi_io, max_dsm_blocks*sequence->device->logical_block_size, &(unmap_process_state->virtual_unmap_buffer), &(unmap_process_state->physical_unmap_buffer_low), &(unmap_process_state->physical_unmap_buffer_high)); // Makes sure we have a buffer if (unmap_process_state->virtual_unmap_buffer == NULL) { // Resource failure sati_scsi_sense_data_construct( sequence, scsi_io, SCSI_STATUS_BUSY, SCSI_SENSE_NO_SENSE, SCSI_ASC_NO_ADDITIONAL_SENSE, SCSI_ASCQ_NO_ADDITIONAL_SENSE ); return SATI_FAILURE_CHECK_RESPONSE_DATA; } // Get the first SGL entry. This code will only use one 4K page so will // only utilize the first sge. sati_cb_sgl_next_sge(scsi_io, ata_io, NULL, &(unmap_process_state->unmap_buffer_sgl_pair)); // Load the first descriptor to start the translation loop unmap_process_state->current_unmap_block_descriptor_index = SATI_UNMAP_SIZEOF_SCSI_UNMAP_PARAMETER_LIST; sati_unmap_load_next_descriptor(sequence,scsi_io); // Next state will be incomplete since translation // will require a callback and possibly more requests. sequence->state = SATI_SEQUENCE_STATE_INCOMPLETE; return SATI_COMPLETE; } /** * @brief This method will process each unmap sequence. * * @return Indicate if the translation was successful. * @retval SATI_SUCCESS */ SATI_STATUS sati_unmap_process( SATI_TRANSLATOR_SEQUENCE_T * sequence, void * scsi_io, void * ata_io ) { SATI_UNMAP_PROCESSING_STATE_T * unmap_process_state; SATI_LBA dsm_descriptor_lba_count; U32 dsm_descriptor; U32 dsm_bytes; U32 dsm_remainder_bytes; U32 dsm_blocks; U32 max_dsm_blocks; unmap_process_state = &sequence->command_specific_data.unmap_process_state; // Set up the starting address of the buffer for this portion of the translation unmap_process_state->current_dsm_descriptor = unmap_process_state->virtual_unmap_buffer; dsm_descriptor = 0; // Translate as much as we can while ((dsm_descriptor < unmap_process_state->max_lba_range_entries) && (unmap_process_state->current_lba_count > 0)) { // See if the LBA count will fit in to a single descriptor if (unmap_process_state->current_lba_count > SATI_DSM_MAX_SECTOR_COUNT) { // Can't fit all of the lbas for this descriptor in to // one DSM request. Adjust the current LbaCount and total // remaining for the next descriptor dsm_descriptor_lba_count = SATI_DSM_MAX_SECTOR_COUNT; unmap_process_state->current_lba_count -= SATI_DSM_MAX_SECTOR_COUNT; unmap_process_state->next_lba = unmap_process_state->current_lba + SATI_DSM_MAX_SECTOR_COUNT; } else { // It all fits in to one descriptor dsm_descriptor_lba_count = unmap_process_state->current_lba_count; unmap_process_state->current_lba_count = 0; } // Fill in the ATA DSM descriptor ((PTRIM_PAIR)(unmap_process_state->current_dsm_descriptor))->sector_address = unmap_process_state->current_lba; ((PTRIM_PAIR)(unmap_process_state->current_dsm_descriptor))->sector_count = dsm_descriptor_lba_count; // See if we can move on to the next descriptor if (unmap_process_state->current_lba_count == 0) { // See if there is another descriptor --unmap_process_state->max_unmap_block_descriptors; if (unmap_process_state->max_unmap_block_descriptors > 0) { // Move on to the next descriptor sati_unmap_load_next_descriptor(sequence,scsi_io); } } else { // Move to the next LBA in this descriptor unmap_process_state->current_lba = unmap_process_state->next_lba; } // Make sure the LBA does not exceed 48 bits... ASSERT(unmap_process_state->current_lba <= SATI_DSM_MAX_SECTOR_ADDRESS); // Increment the number of descriptors used and point to the next entry dsm_descriptor++; unmap_process_state->current_dsm_descriptor = (U8 *)(unmap_process_state->current_dsm_descriptor) + sizeof(TRIM_PAIR); } // Calculate number of blocks we have filled in dsm_blocks = sati_unmap_calculate_dsm_blocks(sequence,dsm_descriptor); dsm_bytes = dsm_blocks * sequence->device->logical_block_size; max_dsm_blocks = sati_unmap_get_max_buffer_size_in_blocks(sequence); // The current_dsm_descriptor points to the next location in the buffer // Get the remaining bytes from the last translated descriptor // to the end of the 4k buffer. dsm_remainder_bytes = sequence->device->logical_block_size; dsm_remainder_bytes -= (U32)((POINTER_UINT)unmap_process_state->current_dsm_descriptor & (sequence->device->logical_block_size-1)); // If there was no remainder, the complete buffer was filled in. if (dsm_remainder_bytes != sequence->device->logical_block_size) { // Add on the remaining unfilled blocks dsm_remainder_bytes += (sequence->device->logical_block_size * (max_dsm_blocks - dsm_blocks)); // According to ATA-8, if the DSM buffer is not completely filled with // valid DSM descriptor data, the remaining portion of the // buffer must be filled in with zeros. memset((U8 *)unmap_process_state->current_dsm_descriptor, 0, dsm_remainder_bytes); } // Tell scic to utilize this sgl pair for write DMA processing of // the SCSI UNMAP translation with the total number of bytes for this transfer sati_cb_sge_write(unmap_process_state->unmap_buffer_sgl_pair, unmap_process_state->physical_unmap_buffer_low, unmap_process_state->physical_unmap_buffer_high, dsm_bytes); // Construct the unmap ATA request sati_unmap_construct(sequence, scsi_io, ata_io, dsm_blocks); // Determine sequence next state based on whether there is more translation // to complete if (unmap_process_state->current_lba_count == 0) { // used for completion routine to determine if there is more processing sequence->state = SATI_SEQUENCE_STATE_FINAL; } // This requests has already translated the SGL, have SCIC skip SGL translataion return SATI_SUCCESS_SGL_TRANSLATED; } //****************************************************************************** //* P U B L I C M E T H O D S //****************************************************************************** /** * @brief This method will handle termination of the * SCSI unmap translation and frees previously allocated * dma buffer. * * @return None */ void sati_unmap_terminate( SATI_TRANSLATOR_SEQUENCE_T * sequence, void * scsi_io, void * ata_io ) { SATI_UNMAP_PROCESSING_STATE_T * unmap_process_state; unmap_process_state = &sequence->command_specific_data.unmap_process_state; if (unmap_process_state->virtual_unmap_buffer != NULL) { sati_cb_free_dma_buffer(scsi_io, unmap_process_state->virtual_unmap_buffer); unmap_process_state->virtual_unmap_buffer = NULL; } } /** * @brief This method will translate the SCSI Unmap command * into corresponding ATA commands. Depending upon the capabilities * supported by the target different ATA commands can be selected. * Additionally, in some cases more than a single ATA command may * be required. * * @return Indicate if the command translation succeeded. * @retval SATI_SUCCESS This is returned if the command translation was * successful. * @retval SATI_COMPLETE This is returned if the command translation was * successful and no ATA commands need to be set. * @retval SATI_FAILURE_CHECK_RESPONSE_DATA This value is returned if * sense data has been created as a result of something specified * in the parameter data fields. */ SATI_STATUS sati_unmap_translate_command( SATI_TRANSLATOR_SEQUENCE_T * sequence, void * scsi_io, void * ata_io ) { SATI_STATUS status = SATI_FAILURE_CHECK_RESPONSE_DATA; SATI_UNMAP_PROCESSING_STATE_T * unmap_process_state; unmap_process_state = &sequence->command_specific_data.unmap_process_state; // Determine if this is the first step in the unmap sequence if ( sequence->state == SATI_SEQUENCE_STATE_INITIAL ) { status = sati_unmap_initial_processing(sequence,scsi_io,ata_io); if (status != SATI_COMPLETE) { return status; } } // Translate the next portion of the UNMAP request return sati_unmap_process(sequence, scsi_io, ata_io); } /** * @brief This method will translate the ATA command register FIS * response into an appropriate SCSI response for Unmap. * For more information on the parameters passed to this method, * please reference sati_translate_response(). * * @return Indicate if the response translation succeeded. * @retval SATI_SUCCESS This is returned if the command translation was * successful. * @retval SATI_COMPLETE This is returned if the command translation was * successful and no ATA commands need to be set. * @retval SATI_FAILURE_CHECK_RESPONSE_DATA This value is returned if * sense data has been created as a result of something specified * in the parameter data fields. */ SATI_STATUS sati_unmap_translate_response( SATI_TRANSLATOR_SEQUENCE_T * sequence, void * scsi_io, void * ata_io ) { U8 * register_fis = sati_cb_get_d2h_register_fis_address(ata_io); SATI_UNMAP_PROCESSING_STATE_T * unmap_process_state; SATI_STATUS sati_status = SATI_COMPLETE; unmap_process_state = &sequence->command_specific_data.unmap_process_state; if (sati_get_ata_status(register_fis) & ATA_STATUS_REG_ERROR_BIT) { sequence->state = SATI_SEQUENCE_STATE_FINAL; sati_scsi_sense_data_construct( sequence, scsi_io, SCSI_STATUS_CHECK_CONDITION, SCSI_SENSE_ABORTED_COMMAND, SCSI_ASC_NO_ADDITIONAL_SENSE, SCSI_ASCQ_NO_ADDITIONAL_SENSE ); // All done, terminate the translation sati_unmap_terminate(sequence, scsi_io, ata_io); } else { if (sequence->state != SATI_SEQUENCE_STATE_INCOMPLETE) { // All done, terminate the translation sati_unmap_terminate(sequence, scsi_io, ata_io); } else { // Still translating sati_status = SATI_SEQUENCE_STATE_INCOMPLETE; } } return sati_status; } #endif // !defined(DISABLE_SATI_UNMAP)