Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 253 insertions, 0 deletions

diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-trans.c b/drivers/net/wireless/intel/iwlwifi/iwl-trans.c
new file mode 100644
index 000000000..b1af9359c
--- /dev/null
+++ b/drivers/net/wireless/intel/iwlwifi/iwl-trans.c
@@ -0,0 +1,253 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
+/*
+ * Copyright (C) 2015 Intel Mobile Communications GmbH
+ * Copyright (C) 2016-2017 Intel Deutschland GmbH
+ * Copyright (C) 2019-2021 Intel Corporation
+ */
+#include <linux/kernel.h>
+#include <linux/bsearch.h>
+
+#include "fw/api/tx.h"
+#include "iwl-trans.h"
+#include "iwl-drv.h"
+#include "iwl-fh.h"
+#include "queue/tx.h"
+#include <linux/dmapool.h>
+#include "fw/api/commands.h"
+
+struct iwl_trans *iwl_trans_alloc(unsigned int priv_size,
+				  struct device *dev,
+				  const struct iwl_trans_ops *ops,
+				  const struct iwl_cfg_trans_params *cfg_trans)
+{
+	struct iwl_trans *trans;
+#ifdef CONFIG_LOCKDEP
+	static struct lock_class_key __key;
+#endif
+
+	trans = devm_kzalloc(dev, sizeof(*trans) + priv_size, GFP_KERNEL);
+	if (!trans)
+		return NULL;
+
+	trans->trans_cfg = cfg_trans;
+
+#ifdef CONFIG_LOCKDEP
+	lockdep_init_map(&trans->sync_cmd_lockdep_map, "sync_cmd_lockdep_map",
+			 &__key, 0);
+#endif
+
+	trans->dev = dev;
+	trans->ops = ops;
+	trans->num_rx_queues = 1;
+
+	WARN_ON(!ops->wait_txq_empty && !ops->wait_tx_queues_empty);
+
+	if (trans->trans_cfg->use_tfh) {
+		trans->txqs.tfd.addr_size = 64;
+		trans->txqs.tfd.max_tbs = IWL_TFH_NUM_TBS;
+		trans->txqs.tfd.size = sizeof(struct iwl_tfh_tfd);
+	} else {
+		trans->txqs.tfd.addr_size = 36;
+		trans->txqs.tfd.max_tbs = IWL_NUM_OF_TBS;
+		trans->txqs.tfd.size = sizeof(struct iwl_tfd);
+	}
+	trans->max_skb_frags = IWL_TRANS_MAX_FRAGS(trans);
+
+	return trans;
+}
+
+int iwl_trans_init(struct iwl_trans *trans)
+{
+	int txcmd_size, txcmd_align;
+
+	if (!trans->trans_cfg->gen2) {
+		txcmd_size = sizeof(struct iwl_tx_cmd);
+		txcmd_align = sizeof(void *);
+	} else if (trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_AX210) {
+		txcmd_size = sizeof(struct iwl_tx_cmd_gen2);
+		txcmd_align = 64;
+	} else {
+		txcmd_size = sizeof(struct iwl_tx_cmd_gen3);
+		txcmd_align = 128;
+	}
+
+	txcmd_size += sizeof(struct iwl_cmd_header);
+	txcmd_size += 36; /* biggest possible 802.11 header */
+
+	/* Ensure device TX cmd cannot reach/cross a page boundary in gen2 */
+	if (WARN_ON(trans->trans_cfg->gen2 && txcmd_size >= txcmd_align))
+		return -EINVAL;
+
+	if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_BZ)
+		trans->txqs.bc_tbl_size =
+			sizeof(struct iwl_gen3_bc_tbl_entry) * TFD_QUEUE_BC_SIZE_GEN3_BZ;
+	else if (trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210)
+		trans->txqs.bc_tbl_size =
+			sizeof(struct iwl_gen3_bc_tbl_entry) * TFD_QUEUE_BC_SIZE_GEN3_AX210;
+	else
+		trans->txqs.bc_tbl_size = sizeof(struct iwlagn_scd_bc_tbl);
+	/*
+	 * For gen2 devices, we use a single allocation for each byte-count
+	 * table, but they're pretty small (1k) so use a DMA pool that we
+	 * allocate here.
+	 */
+	if (trans->trans_cfg->gen2) {
+		trans->txqs.bc_pool = dmam_pool_create("iwlwifi:bc", trans->dev,
+						       trans->txqs.bc_tbl_size,
+						       256, 0);
+		if (!trans->txqs.bc_pool)
+			return -ENOMEM;
+	}
+
+	/* Some things must not change even if the config does */
+	WARN_ON(trans->txqs.tfd.addr_size !=
+		(trans->trans_cfg->use_tfh ? 64 : 36));
+
+	snprintf(trans->dev_cmd_pool_name, sizeof(trans->dev_cmd_pool_name),
+		 "iwl_cmd_pool:%s", dev_name(trans->dev));
+	trans->dev_cmd_pool =
+		kmem_cache_create(trans->dev_cmd_pool_name,
+				  txcmd_size, txcmd_align,
+				  SLAB_HWCACHE_ALIGN, NULL);
+	if (!trans->dev_cmd_pool)
+		return -ENOMEM;
+
+	trans->txqs.tso_hdr_page = alloc_percpu(struct iwl_tso_hdr_page);
+	if (!trans->txqs.tso_hdr_page) {
+		kmem_cache_destroy(trans->dev_cmd_pool);
+		return -ENOMEM;
+	}
+
+	/* Initialize the wait queue for commands */
+	init_waitqueue_head(&trans->wait_command_queue);
+
+	return 0;
+}
+
+void iwl_trans_free(struct iwl_trans *trans)
+{
+	int i;
+
+	if (trans->txqs.tso_hdr_page) {
+		for_each_possible_cpu(i) {
+			struct iwl_tso_hdr_page *p =
+				per_cpu_ptr(trans->txqs.tso_hdr_page, i);
+
+			if (p && p->page)
+				__free_page(p->page);
+		}
+
+		free_percpu(trans->txqs.tso_hdr_page);
+	}
+
+	kmem_cache_destroy(trans->dev_cmd_pool);
+}
+
+int iwl_trans_send_cmd(struct iwl_trans *trans, struct iwl_host_cmd *cmd)
+{
+	int ret;
+
+	if (unlikely(!(cmd->flags & CMD_SEND_IN_RFKILL) &&
+		     test_bit(STATUS_RFKILL_OPMODE, &trans->status)))
+		return -ERFKILL;
+
+	/*
+	 * We can't test IWL_MVM_STATUS_IN_D3 in mvm->status because this
+	 * bit is set early in the D3 flow, before we send all the commands
+	 * that configure the firmware for D3 operation (power, patterns, ...)
+	 * and we don't want to flag all those with CMD_SEND_IN_D3.
+	 * So use the system_pm_mode instead. The only command sent after
+	 * we set system_pm_mode is D3_CONFIG_CMD, which we now flag with
+	 * CMD_SEND_IN_D3.
+	 */
+	if (unlikely(trans->system_pm_mode == IWL_PLAT_PM_MODE_D3 &&
+		     !(cmd->flags & CMD_SEND_IN_D3)))
+		return -EHOSTDOWN;
+
+	if (unlikely(test_bit(STATUS_FW_ERROR, &trans->status)))
+		return -EIO;
+
+	if (unlikely(trans->state != IWL_TRANS_FW_ALIVE)) {
+		IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state);
+		return -EIO;
+	}
+
+	if (WARN_ON((cmd->flags & CMD_WANT_ASYNC_CALLBACK) &&
+		    !(cmd->flags & CMD_ASYNC)))
+		return -EINVAL;
+
+	if (!(cmd->flags & CMD_ASYNC))
+		lock_map_acquire_read(&trans->sync_cmd_lockdep_map);
+
+	if (trans->wide_cmd_header && !iwl_cmd_groupid(cmd->id)) {
+		if (cmd->id != REPLY_ERROR)
+			cmd->id = DEF_ID(cmd->id);
+	}
+
+	ret = iwl_trans_txq_send_hcmd(trans, cmd);
+
+	if (!(cmd->flags & CMD_ASYNC))
+		lock_map_release(&trans->sync_cmd_lockdep_map);
+
+	if (WARN_ON((cmd->flags & CMD_WANT_SKB) && !ret && !cmd->resp_pkt))
+		return -EIO;
+
+	return ret;
+}
+IWL_EXPORT_SYMBOL(iwl_trans_send_cmd);
+
+/* Comparator for struct iwl_hcmd_names.
+ * Used in the binary search over a list of host commands.
+ *
+ * @key: command_id that we're looking for.
+ * @elt: struct iwl_hcmd_names candidate for match.
+ *
+ * @return 0 iff equal.
+ */
+static int iwl_hcmd_names_cmp(const void *key, const void *elt)
+{
+	const struct iwl_hcmd_names *name = elt;
+	const u8 *cmd1 = key;
+	u8 cmd2 = name->cmd_id;
+
+	return (*cmd1 - cmd2);
+}
+
+const char *iwl_get_cmd_string(struct iwl_trans *trans, u32 id)
+{
+	u8 grp, cmd;
+	struct iwl_hcmd_names *ret;
+	const struct iwl_hcmd_arr *arr;
+	size_t size = sizeof(struct iwl_hcmd_names);
+
+	grp = iwl_cmd_groupid(id);
+	cmd = iwl_cmd_opcode(id);
+
+	if (!trans->command_groups || grp >= trans->command_groups_size ||
+	    !trans->command_groups[grp].arr)
+		return "UNKNOWN";
+
+	arr = &trans->command_groups[grp];
+	ret = bsearch(&cmd, arr->arr, arr->size, size, iwl_hcmd_names_cmp);
+	if (!ret)
+		return "UNKNOWN";
+	return ret->cmd_name;
+}
+IWL_EXPORT_SYMBOL(iwl_get_cmd_string);
+
+int iwl_cmd_groups_verify_sorted(const struct iwl_trans_config *trans)
+{
+	int i, j;
+	const struct iwl_hcmd_arr *arr;
+
+	for (i = 0; i < trans->command_groups_size; i++) {
+		arr = &trans->command_groups[i];
+		if (!arr->arr)
+			continue;
+		for (j = 0; j < arr->size - 1; j++)
+			if (arr->arr[j].cmd_id > arr->arr[j + 1].cmd_id)
+				return -1;
+	}
+	return 0;
+}
+IWL_EXPORT_SYMBOL(iwl_cmd_groups_verify_sorted);