FreeBSD/Linux Kernel Cross Reference
sys/dev/iwm/if_iwm_fw.c

     /*-
      * Based on BSD-licensed source modules in the Linux iwlwifi driver,
      * which were used as the reference documentation for this implementation.
      *
      * Driver version we are currently based off of is
      * Linux 4.7.3 (tag id d7f6728f57e3ecbb7ef34eb7d9f564d514775d75)
      *
      ***********************************************************************
      *
     * 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) 2012 - 2014 Intel Corporation. All rights reserved.
     * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
     * Copyright(c) 2016 Intel Deutschland GmbH
     *
     * 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 Street, Fifth Floor, Boston, MA 02110,
     * USA
     *
     * The full GNU General Public License is included in this distribution
     * in the file called COPYING.
     *
     * Contact Information:
     *  Intel Linux Wireless <linuxwifi@intel.com>
     * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
     *
     * BSD LICENSE
     *
     * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
     * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
     * 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.
     *  * Neither the name Intel Corporation nor the names of its
     *    contributors may be used to endorse or promote products derived
     *    from this software without specific prior written permission.
     *
     * 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 <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    #include "opt_wlan.h"
    #include "opt_iwm.h"
    
    #include <sys/param.h>
    #include <sys/bus.h>
    #include <sys/conf.h>
    #include <sys/endian.h>
    #include <sys/firmware.h>
    #include <sys/kernel.h>
    #include <sys/malloc.h>
    #include <sys/mbuf.h>
    #include <sys/mutex.h>
    #include <sys/module.h>
    #include <sys/proc.h>
    #include <sys/rman.h>
    #include <sys/socket.h>
    #include <sys/sockio.h>
    #include <sys/sysctl.h>
    #include <sys/linker.h>
    
    #include <machine/bus.h>
    #include <machine/endian.h>
    #include <machine/resource.h>
    
   #include <dev/pci/pcivar.h>
   #include <dev/pci/pcireg.h>
   
   #include <net/bpf.h>
   
   #include <net/if.h>
   #include <net/if_var.h>
   #include <net/if_arp.h>
   #include <net/if_dl.h>
   #include <net/if_media.h>
   #include <net/if_types.h>
   
   #include <netinet/in.h>
   #include <netinet/in_systm.h>
   #include <netinet/if_ether.h>
   #include <netinet/ip.h>
   
   #include <net80211/ieee80211_var.h>
   #include <net80211/ieee80211_regdomain.h>
   #include <net80211/ieee80211_ratectl.h>
   #include <net80211/ieee80211_radiotap.h>
   
   #include <dev/iwm/if_iwmreg.h>
   #include <dev/iwm/if_iwmvar.h>
   #include <dev/iwm/if_iwm_debug.h>
   #include <dev/iwm/if_iwm_util.h>
   #include <dev/iwm/if_iwm_fw.h>
   
   void
   iwm_free_fw_paging(struct iwm_softc *sc)
   {
           int i;
   
           if (sc->fw_paging_db[0].fw_paging_block.vaddr == NULL)
                   return;
   
           for (i = 0; i < IWM_NUM_OF_FW_PAGING_BLOCKS; i++) {
                   iwm_dma_contig_free(&sc->fw_paging_db[i].fw_paging_block);
           }
   
           memset(sc->fw_paging_db, 0, sizeof(sc->fw_paging_db));
   }
   
   static int
   iwm_fill_paging_mem(struct iwm_softc *sc, const struct iwm_fw_img *image)
   {
           int sec_idx, idx;
           uint32_t offset = 0;
   
           /*
            * find where is the paging image start point:
            * if CPU2 exist and it's in paging format, then the image looks like:
            * CPU1 sections (2 or more)
            * CPU1_CPU2_SEPARATOR_SECTION delimiter - separate between CPU1 to CPU2
            * CPU2 sections (not paged)
            * PAGING_SEPARATOR_SECTION delimiter - separate between CPU2
            * non paged to CPU2 paging sec
            * CPU2 paging CSS
            * CPU2 paging image (including instruction and data)
            */
           for (sec_idx = 0; sec_idx < IWM_UCODE_SECTION_MAX; sec_idx++) {
                   if (image->sec[sec_idx].offset == IWM_PAGING_SEPARATOR_SECTION) {
                           sec_idx++;
                           break;
                   }
           }
   
           /*
            * If paging is enabled there should be at least 2 more sections left
            * (one for CSS and one for Paging data)
            */
           if (sec_idx >= nitems(image->sec) - 1) {
                   device_printf(sc->sc_dev,
                       "Paging: Missing CSS and/or paging sections\n");
                   iwm_free_fw_paging(sc);
                   return EINVAL;
           }
   
           /* copy the CSS block to the dram */
           IWM_DPRINTF(sc, IWM_DEBUG_FW,
                       "Paging: load paging CSS to FW, sec = %d\n",
                       sec_idx);
   
           memcpy(sc->fw_paging_db[0].fw_paging_block.vaddr,
                  image->sec[sec_idx].data,
                  sc->fw_paging_db[0].fw_paging_size);
   
           IWM_DPRINTF(sc, IWM_DEBUG_FW,
                       "Paging: copied %d CSS bytes to first block\n",
                       sc->fw_paging_db[0].fw_paging_size);
   
           sec_idx++;
   
           /*
            * copy the paging blocks to the dram
            * loop index start from 1 since that CSS block already copied to dram
            * and CSS index is 0.
            * loop stop at num_of_paging_blk since that last block is not full.
            */
           for (idx = 1; idx < sc->num_of_paging_blk; idx++) {
                   memcpy(sc->fw_paging_db[idx].fw_paging_block.vaddr,
                          (const char *)image->sec[sec_idx].data + offset,
                          sc->fw_paging_db[idx].fw_paging_size);
   
                   IWM_DPRINTF(sc, IWM_DEBUG_FW,
                               "Paging: copied %d paging bytes to block %d\n",
                               sc->fw_paging_db[idx].fw_paging_size,
                               idx);
   
                   offset += sc->fw_paging_db[idx].fw_paging_size;
           }
   
           /* copy the last paging block */
           if (sc->num_of_pages_in_last_blk > 0) {
                   memcpy(sc->fw_paging_db[idx].fw_paging_block.vaddr,
                          (const char *)image->sec[sec_idx].data + offset,
                          IWM_FW_PAGING_SIZE * sc->num_of_pages_in_last_blk);
   
                   IWM_DPRINTF(sc, IWM_DEBUG_FW,
                               "Paging: copied %d pages in the last block %d\n",
                               sc->num_of_pages_in_last_blk, idx);
           }
   
           return 0;
   }
   
   static int
   iwm_alloc_fw_paging_mem(struct iwm_softc *sc, const struct iwm_fw_img *image)
   {
           int blk_idx = 0;
           int error, num_of_pages;
   
           if (sc->fw_paging_db[0].fw_paging_block.vaddr != NULL) {
                   int i;
                   /* Device got reset, and we setup firmware paging again */
                   for (i = 0; i < sc->num_of_paging_blk + 1; i++) {
                           bus_dmamap_sync(sc->sc_dmat,
                               sc->fw_paging_db[i].fw_paging_block.map,
                               BUS_DMASYNC_POSTWRITE | BUS_DMASYNC_POSTREAD);
                   }
                   return 0;
           }
   
           /* ensure IWM_BLOCK_2_EXP_SIZE is power of 2 of IWM_PAGING_BLOCK_SIZE */
           _Static_assert((1 << IWM_BLOCK_2_EXP_SIZE) == IWM_PAGING_BLOCK_SIZE,
               "IWM_BLOCK_2_EXP_SIZE must be power of 2 of IWM_PAGING_BLOCK_SIZE");
   
           num_of_pages = image->paging_mem_size / IWM_FW_PAGING_SIZE;
           sc->num_of_paging_blk = ((num_of_pages - 1) /
                                       IWM_NUM_OF_PAGE_PER_GROUP) + 1;
   
           sc->num_of_pages_in_last_blk =
                   num_of_pages -
                   IWM_NUM_OF_PAGE_PER_GROUP * (sc->num_of_paging_blk - 1);
   
           IWM_DPRINTF(sc, IWM_DEBUG_FW,
                       "Paging: allocating mem for %d paging blocks, each block holds 8 pages, last block holds %d pages\n",
                       sc->num_of_paging_blk,
                       sc->num_of_pages_in_last_blk);
   
           /* allocate block of 4Kbytes for paging CSS */
           error = iwm_dma_contig_alloc(sc->sc_dmat,
               &sc->fw_paging_db[blk_idx].fw_paging_block, IWM_FW_PAGING_SIZE,
               4096);
           if (error) {
                   /* free all the previous pages since we failed */
                   iwm_free_fw_paging(sc);
                   return ENOMEM;
           }
   
           sc->fw_paging_db[blk_idx].fw_paging_size = IWM_FW_PAGING_SIZE;
   
           IWM_DPRINTF(sc, IWM_DEBUG_FW,
                       "Paging: allocated 4K(CSS) bytes for firmware paging.\n");
   
           /*
            * allocate blocks in dram.
            * since that CSS allocated in fw_paging_db[0] loop start from index 1
            */
           for (blk_idx = 1; blk_idx < sc->num_of_paging_blk + 1; blk_idx++) {
                   /* allocate block of IWM_PAGING_BLOCK_SIZE (32K) */
                   /* XXX Use iwm_dma_contig_alloc for allocating */
                   error = iwm_dma_contig_alloc(sc->sc_dmat,
                        &sc->fw_paging_db[blk_idx].fw_paging_block,
                       IWM_PAGING_BLOCK_SIZE, 4096);
                   if (error) {
                           /* free all the previous pages since we failed */
                           iwm_free_fw_paging(sc);
                           return ENOMEM;
                   }
   
                   sc->fw_paging_db[blk_idx].fw_paging_size = IWM_PAGING_BLOCK_SIZE;
   
                   IWM_DPRINTF(sc, IWM_DEBUG_FW,
                               "Paging: allocated 32K bytes for firmware paging.\n");
           }
   
           return 0;
   }
   
   int
   iwm_save_fw_paging(struct iwm_softc *sc, const struct iwm_fw_img *fw)
   {
           int ret;
   
           ret = iwm_alloc_fw_paging_mem(sc, fw);
           if (ret)
                   return ret;
   
           return iwm_fill_paging_mem(sc, fw);
   }
   
   /* send paging cmd to FW in case CPU2 has paging image */
   int
   iwm_send_paging_cmd(struct iwm_softc *sc, const struct iwm_fw_img *fw)
   {
           int blk_idx;
           uint32_t dev_phy_addr;
           struct iwm_fw_paging_cmd fw_paging_cmd = {
                   .flags =
                           htole32(IWM_PAGING_CMD_IS_SECURED |
                                   IWM_PAGING_CMD_IS_ENABLED |
                                   (sc->num_of_pages_in_last_blk <<
                                   IWM_PAGING_CMD_NUM_OF_PAGES_IN_LAST_GRP_POS)),
                   .block_size = htole32(IWM_BLOCK_2_EXP_SIZE),
                   .block_num = htole32(sc->num_of_paging_blk),
           };
   
           /* loop for all paging blocks + CSS block */
           for (blk_idx = 0; blk_idx < sc->num_of_paging_blk + 1; blk_idx++) {
                   dev_phy_addr = htole32(
                       sc->fw_paging_db[blk_idx].fw_paging_block.paddr >>
                       IWM_PAGE_2_EXP_SIZE);
                   fw_paging_cmd.device_phy_addr[blk_idx] = dev_phy_addr;
                   bus_dmamap_sync(sc->sc_dmat,
                       sc->fw_paging_db[blk_idx].fw_paging_block.map,
                       BUS_DMASYNC_PREWRITE | BUS_DMASYNC_PREREAD);
           }
   
           return iwm_send_cmd_pdu(sc, iwm_cmd_id(IWM_FW_PAGING_BLOCK_CMD,
                                                      IWM_ALWAYS_LONG_GROUP, 0),
                                       0, sizeof(fw_paging_cmd), &fw_paging_cmd);
   }

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