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path: root/drivers/net/wireless/iwlwifi/mvm/fw.c
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Diffstat (limited to 'drivers/net/wireless/iwlwifi/mvm/fw.c')
-rw-r--r--drivers/net/wireless/iwlwifi/mvm/fw.c258
1 files changed, 258 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlwifi/mvm/fw.c b/drivers/net/wireless/iwlwifi/mvm/fw.c
index 106edc7..acb402b 100644
--- a/drivers/net/wireless/iwlwifi/mvm/fw.c
+++ b/drivers/net/wireless/iwlwifi/mvm/fw.c
@@ -106,6 +106,244 @@ static int iwl_send_tx_ant_cfg(struct iwl_mvm *mvm, u8 valid_tx_ant)
sizeof(tx_ant_cmd), &tx_ant_cmd);
}
+static void iwl_free_fw_paging(struct iwl_mvm *mvm)
+{
+ int i;
+
+ if (!mvm->fw_paging_db[0].fw_paging_block)
+ return;
+
+ for (i = 0; i < NUM_OF_FW_PAGING_BLOCKS; i++) {
+ if (!mvm->fw_paging_db[i].fw_paging_block) {
+ IWL_DEBUG_FW(mvm,
+ "Paging: block %d already freed, continue to next page\n",
+ i);
+
+ continue;
+ }
+
+ __free_pages(mvm->fw_paging_db[i].fw_paging_block,
+ get_order(mvm->fw_paging_db[i].fw_paging_size));
+ }
+ memset(mvm->fw_paging_db, 0, sizeof(mvm->fw_paging_db));
+}
+
+static int iwl_fill_paging_mem(struct iwl_mvm *mvm, const struct fw_img *image)
+{
+ int sec_idx, idx;
+ u32 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 < IWL_UCODE_SECTION_MAX; sec_idx++) {
+ if (image->sec[sec_idx].offset == PAGING_SEPARATOR_SECTION) {
+ sec_idx++;
+ break;
+ }
+ }
+
+ if (sec_idx >= IWL_UCODE_SECTION_MAX) {
+ IWL_ERR(mvm, "driver didn't find paging image\n");
+ iwl_free_fw_paging(mvm);
+ return -EINVAL;
+ }
+
+ /* copy the CSS block to the dram */
+ IWL_DEBUG_FW(mvm, "Paging: load paging CSS to FW, sec = %d\n",
+ sec_idx);
+
+ memcpy(page_address(mvm->fw_paging_db[0].fw_paging_block),
+ image->sec[sec_idx].data,
+ mvm->fw_paging_db[0].fw_paging_size);
+
+ IWL_DEBUG_FW(mvm,
+ "Paging: copied %d CSS bytes to first block\n",
+ mvm->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 < mvm->num_of_paging_blk; idx++) {
+ memcpy(page_address(mvm->fw_paging_db[idx].fw_paging_block),
+ image->sec[sec_idx].data + offset,
+ mvm->fw_paging_db[idx].fw_paging_size);
+
+ IWL_DEBUG_FW(mvm,
+ "Paging: copied %d paging bytes to block %d\n",
+ mvm->fw_paging_db[idx].fw_paging_size,
+ idx);
+
+ offset += mvm->fw_paging_db[idx].fw_paging_size;
+ }
+
+ /* copy the last paging block */
+ if (mvm->num_of_pages_in_last_blk > 0) {
+ memcpy(page_address(mvm->fw_paging_db[idx].fw_paging_block),
+ image->sec[sec_idx].data + offset,
+ FW_PAGING_SIZE * mvm->num_of_pages_in_last_blk);
+
+ IWL_DEBUG_FW(mvm,
+ "Paging: copied %d pages in the last block %d\n",
+ mvm->num_of_pages_in_last_blk, idx);
+ }
+
+ return 0;
+}
+
+static int iwl_alloc_fw_paging_mem(struct iwl_mvm *mvm,
+ const struct fw_img *image)
+{
+ struct page *block;
+ dma_addr_t phys = 0;
+ int blk_idx = 0;
+ int order, num_of_pages;
+ int dma_enabled;
+
+ if (mvm->fw_paging_db[0].fw_paging_block)
+ return 0;
+
+ dma_enabled = is_device_dma_capable(mvm->trans->dev);
+
+ /* ensure BLOCK_2_EXP_SIZE is power of 2 of PAGING_BLOCK_SIZE */
+ BUILD_BUG_ON(BIT(BLOCK_2_EXP_SIZE) != PAGING_BLOCK_SIZE);
+
+ num_of_pages = image->paging_mem_size / FW_PAGING_SIZE;
+ mvm->num_of_paging_blk = ((num_of_pages - 1) /
+ NUM_OF_PAGE_PER_GROUP) + 1;
+
+ mvm->num_of_pages_in_last_blk =
+ num_of_pages -
+ NUM_OF_PAGE_PER_GROUP * (mvm->num_of_paging_blk - 1);
+
+ IWL_DEBUG_FW(mvm,
+ "Paging: allocating mem for %d paging blocks, each block holds 8 pages, last block holds %d pages\n",
+ mvm->num_of_paging_blk,
+ mvm->num_of_pages_in_last_blk);
+
+ /* allocate block of 4Kbytes for paging CSS */
+ order = get_order(FW_PAGING_SIZE);
+ block = alloc_pages(GFP_KERNEL, order);
+ if (!block) {
+ /* free all the previous pages since we failed */
+ iwl_free_fw_paging(mvm);
+ return -ENOMEM;
+ }
+
+ mvm->fw_paging_db[blk_idx].fw_paging_block = block;
+ mvm->fw_paging_db[blk_idx].fw_paging_size = FW_PAGING_SIZE;
+
+ if (dma_enabled) {
+ phys = dma_map_page(mvm->trans->dev, block, 0,
+ PAGE_SIZE << order, DMA_BIDIRECTIONAL);
+ if (dma_mapping_error(mvm->trans->dev, phys)) {
+ /*
+ * free the previous pages and the current one since
+ * we failed to map_page.
+ */
+ iwl_free_fw_paging(mvm);
+ return -ENOMEM;
+ }
+ mvm->fw_paging_db[blk_idx].fw_paging_phys = phys;
+ }
+
+ IWL_DEBUG_FW(mvm,
+ "Paging: allocated 4K(CSS) bytes (order %d) for firmware paging.\n",
+ order);
+
+ /*
+ * allocate blocks in dram.
+ * since that CSS allocated in fw_paging_db[0] loop start from index 1
+ */
+ for (blk_idx = 1; blk_idx < mvm->num_of_paging_blk + 1; blk_idx++) {
+ /* allocate block of PAGING_BLOCK_SIZE (32K) */
+ order = get_order(PAGING_BLOCK_SIZE);
+ block = alloc_pages(GFP_KERNEL, order);
+ if (!block) {
+ /* free all the previous pages since we failed */
+ iwl_free_fw_paging(mvm);
+ return -ENOMEM;
+ }
+
+ mvm->fw_paging_db[blk_idx].fw_paging_block = block;
+ mvm->fw_paging_db[blk_idx].fw_paging_size = PAGING_BLOCK_SIZE;
+
+ if (dma_enabled) {
+ phys = dma_map_page(mvm->trans->dev, block, 0,
+ PAGE_SIZE << order,
+ DMA_BIDIRECTIONAL);
+ if (dma_mapping_error(mvm->trans->dev, phys)) {
+ /*
+ * free the previous pages and the current one
+ * since we failed to map_page.
+ */
+ iwl_free_fw_paging(mvm);
+ return -ENOMEM;
+ }
+ mvm->fw_paging_db[blk_idx].fw_paging_phys = phys;
+ }
+
+ IWL_DEBUG_FW(mvm,
+ "Paging: allocated 32K bytes (order %d) for firmware paging.\n",
+ order);
+ }
+
+ return 0;
+}
+
+static int iwl_save_fw_paging(struct iwl_mvm *mvm,
+ const struct fw_img *fw)
+{
+ int ret;
+
+ ret = iwl_alloc_fw_paging_mem(mvm, fw);
+ if (ret)
+ return ret;
+
+ return iwl_fill_paging_mem(mvm, fw);
+}
+
+/* send paging cmd to FW in case CPU2 has paging image */
+static int iwl_send_paging_cmd(struct iwl_mvm *mvm, const struct fw_img *fw)
+{
+ int blk_idx;
+ __le32 dev_phy_addr;
+ struct iwl_fw_paging_cmd fw_paging_cmd = {
+ .flags =
+ cpu_to_le32(PAGING_CMD_IS_SECURED |
+ PAGING_CMD_IS_ENABLED |
+ (mvm->num_of_pages_in_last_blk <<
+ PAGING_CMD_NUM_OF_PAGES_IN_LAST_GRP_POS)),
+ .block_size = cpu_to_le32(BLOCK_2_EXP_SIZE),
+ .block_num = cpu_to_le32(mvm->num_of_paging_blk),
+ };
+
+ /* loop for for all paging blocks + CSS block */
+ for (blk_idx = 0; blk_idx < mvm->num_of_paging_blk + 1; blk_idx++) {
+ dev_phy_addr =
+ cpu_to_le32(mvm->fw_paging_db[blk_idx].fw_paging_phys >>
+ PAGE_2_EXP_SIZE);
+ fw_paging_cmd.device_phy_addr[blk_idx] = dev_phy_addr;
+ }
+
+ return iwl_mvm_send_cmd_pdu(mvm, iwl_cmd_id(FW_PAGING_BLOCK_CMD,
+ IWL_ALWAYS_LONG_GROUP, 0),
+ 0, sizeof(fw_paging_cmd), &fw_paging_cmd);
+}
+
static bool iwl_alive_fn(struct iwl_notif_wait_data *notif_wait,
struct iwl_rx_packet *pkt, void *data)
{
@@ -269,6 +507,26 @@ static int iwl_mvm_load_ucode_wait_alive(struct iwl_mvm *mvm,
iwl_trans_fw_alive(mvm->trans, alive_data.scd_base_addr);
/*
+ * configure and operate fw paging mechanism.
+ * driver configures the paging flow only once, CPU2 paging image
+ * included in the IWL_UCODE_INIT image.
+ */
+ if (fw->paging_mem_size) {
+ ret = iwl_save_fw_paging(mvm, fw);
+ if (ret) {
+ IWL_ERR(mvm, "failed to save the FW paging image\n");
+ return ret;
+ }
+
+ ret = iwl_send_paging_cmd(mvm, fw);
+ if (ret) {
+ IWL_ERR(mvm, "failed to send the paging cmd\n");
+ iwl_free_fw_paging(mvm);
+ return ret;
+ }
+ }
+
+ /*
* Note: all the queues are enabled as part of the interface
* initialization, but in firmware restart scenarios they
* could be stopped, so wake them up. In firmware restart,
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