373 lines
8.8 KiB
C
373 lines
8.8 KiB
C
/*
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* Copyright (c) 2012 Qualcomm Atheros, Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <linux/moduleparam.h>
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#include <linux/if_arp.h>
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#include "wil6210.h"
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/*
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* Due to a hardware issue,
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* one has to read/write to/from NIC in 32-bit chunks;
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* regular memcpy_fromio and siblings will
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* not work on 64-bit platform - it uses 64-bit transactions
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*
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* Force 32-bit transactions to enable NIC on 64-bit platforms
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*
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* To avoid byte swap on big endian host, __raw_{read|write}l
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* should be used - {read|write}l would swap bytes to provide
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* little endian on PCI value in host endianness.
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*/
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void wil_memcpy_fromio_32(void *dst, const volatile void __iomem *src,
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size_t count)
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{
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u32 *d = dst;
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const volatile u32 __iomem *s = src;
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/* size_t is unsigned, if (count%4 != 0) it will wrap */
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for (count += 4; count > 4; count -= 4)
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*d++ = __raw_readl(s++);
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}
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void wil_memcpy_toio_32(volatile void __iomem *dst, const void *src,
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size_t count)
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{
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volatile u32 __iomem *d = dst;
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const u32 *s = src;
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for (count += 4; count > 4; count -= 4)
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__raw_writel(*s++, d++);
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}
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static void _wil6210_disconnect(struct wil6210_priv *wil, void *bssid)
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{
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uint i;
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struct net_device *ndev = wil_to_ndev(wil);
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wil_dbg_misc(wil, "%s()\n", __func__);
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wil_link_off(wil);
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if (test_bit(wil_status_fwconnected, &wil->status)) {
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clear_bit(wil_status_fwconnected, &wil->status);
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cfg80211_disconnected(ndev,
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WLAN_STATUS_UNSPECIFIED_FAILURE,
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NULL, 0, GFP_KERNEL);
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} else if (test_bit(wil_status_fwconnecting, &wil->status)) {
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cfg80211_connect_result(ndev, bssid, NULL, 0, NULL, 0,
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WLAN_STATUS_UNSPECIFIED_FAILURE,
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GFP_KERNEL);
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}
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clear_bit(wil_status_fwconnecting, &wil->status);
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for (i = 0; i < ARRAY_SIZE(wil->vring_tx); i++)
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wil_vring_fini_tx(wil, i);
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clear_bit(wil_status_dontscan, &wil->status);
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}
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static void wil_disconnect_worker(struct work_struct *work)
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{
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struct wil6210_priv *wil = container_of(work,
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struct wil6210_priv, disconnect_worker);
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_wil6210_disconnect(wil, NULL);
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}
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static void wil_connect_timer_fn(ulong x)
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{
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struct wil6210_priv *wil = (void *)x;
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wil_dbg_misc(wil, "Connect timeout\n");
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/* reschedule to thread context - disconnect won't
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* run from atomic context
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*/
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schedule_work(&wil->disconnect_worker);
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}
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static void wil_connect_worker(struct work_struct *work)
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{
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int rc;
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struct wil6210_priv *wil = container_of(work, struct wil6210_priv,
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connect_worker);
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int cid = wil->pending_connect_cid;
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if (cid < 0) {
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wil_err(wil, "No connection pending\n");
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return;
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}
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wil_dbg_wmi(wil, "Configure for connection CID %d\n", cid);
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rc = wil_vring_init_tx(wil, 0, WIL6210_TX_RING_SIZE, cid, 0);
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wil->pending_connect_cid = -1;
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if (rc == 0)
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wil_link_on(wil);
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}
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int wil_priv_init(struct wil6210_priv *wil)
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{
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wil_dbg_misc(wil, "%s()\n", __func__);
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mutex_init(&wil->mutex);
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mutex_init(&wil->wmi_mutex);
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init_completion(&wil->wmi_ready);
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wil->pending_connect_cid = -1;
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setup_timer(&wil->connect_timer, wil_connect_timer_fn, (ulong)wil);
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INIT_WORK(&wil->connect_worker, wil_connect_worker);
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INIT_WORK(&wil->disconnect_worker, wil_disconnect_worker);
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INIT_WORK(&wil->wmi_event_worker, wmi_event_worker);
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INIT_LIST_HEAD(&wil->pending_wmi_ev);
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spin_lock_init(&wil->wmi_ev_lock);
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wil->wmi_wq = create_singlethread_workqueue(WIL_NAME"_wmi");
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if (!wil->wmi_wq)
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return -EAGAIN;
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wil->wmi_wq_conn = create_singlethread_workqueue(WIL_NAME"_connect");
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if (!wil->wmi_wq_conn) {
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destroy_workqueue(wil->wmi_wq);
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return -EAGAIN;
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}
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return 0;
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}
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void wil6210_disconnect(struct wil6210_priv *wil, void *bssid)
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{
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del_timer_sync(&wil->connect_timer);
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_wil6210_disconnect(wil, bssid);
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}
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void wil_priv_deinit(struct wil6210_priv *wil)
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{
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cancel_work_sync(&wil->disconnect_worker);
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wil6210_disconnect(wil, NULL);
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wmi_event_flush(wil);
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destroy_workqueue(wil->wmi_wq_conn);
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destroy_workqueue(wil->wmi_wq);
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}
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static void wil_target_reset(struct wil6210_priv *wil)
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{
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wil_dbg_misc(wil, "Resetting...\n");
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/* register write */
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#define W(a, v) iowrite32(v, wil->csr + HOSTADDR(a))
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/* register set = read, OR, write */
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#define S(a, v) iowrite32(ioread32(wil->csr + HOSTADDR(a)) | v, \
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wil->csr + HOSTADDR(a))
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/* hpal_perst_from_pad_src_n_mask */
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S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT(6));
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/* car_perst_rst_src_n_mask */
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S(RGF_USER_CLKS_CTL_SW_RST_MASK_0, BIT(7));
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W(RGF_USER_MAC_CPU_0, BIT(1)); /* mac_cpu_man_rst */
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W(RGF_USER_USER_CPU_0, BIT(1)); /* user_cpu_man_rst */
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W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0xFE000000);
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W(RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0x0000003F);
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W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000170);
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W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0xFFE7FC00);
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W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0);
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W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0);
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W(RGF_USER_CLKS_CTL_SW_RST_VEC_1, 0);
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W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
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W(RGF_USER_CLKS_CTL_SW_RST_VEC_3, 0x00000001);
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W(RGF_USER_CLKS_CTL_SW_RST_VEC_2, 0x00000080);
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W(RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
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wil_dbg_misc(wil, "Reset completed\n");
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#undef W
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#undef S
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}
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void wil_mbox_ring_le2cpus(struct wil6210_mbox_ring *r)
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{
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le32_to_cpus(&r->base);
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le16_to_cpus(&r->entry_size);
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le16_to_cpus(&r->size);
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le32_to_cpus(&r->tail);
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le32_to_cpus(&r->head);
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}
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static int wil_wait_for_fw_ready(struct wil6210_priv *wil)
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{
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ulong to = msecs_to_jiffies(1000);
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ulong left = wait_for_completion_timeout(&wil->wmi_ready, to);
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if (0 == left) {
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wil_err(wil, "Firmware not ready\n");
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return -ETIME;
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} else {
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wil_dbg_misc(wil, "FW ready after %d ms\n",
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jiffies_to_msecs(to-left));
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}
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return 0;
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}
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/*
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* We reset all the structures, and we reset the UMAC.
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* After calling this routine, you're expected to reload
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* the firmware.
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*/
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int wil_reset(struct wil6210_priv *wil)
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{
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int rc;
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cancel_work_sync(&wil->disconnect_worker);
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wil6210_disconnect(wil, NULL);
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wil6210_disable_irq(wil);
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wil->status = 0;
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wmi_event_flush(wil);
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flush_workqueue(wil->wmi_wq_conn);
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flush_workqueue(wil->wmi_wq);
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/* TODO: put MAC in reset */
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wil_target_reset(wil);
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/* init after reset */
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wil->pending_connect_cid = -1;
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reinit_completion(&wil->wmi_ready);
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/* TODO: release MAC reset */
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wil6210_enable_irq(wil);
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/* we just started MAC, wait for FW ready */
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rc = wil_wait_for_fw_ready(wil);
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return rc;
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}
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void wil_link_on(struct wil6210_priv *wil)
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{
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struct net_device *ndev = wil_to_ndev(wil);
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wil_dbg_misc(wil, "%s()\n", __func__);
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netif_carrier_on(ndev);
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netif_tx_wake_all_queues(ndev);
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}
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void wil_link_off(struct wil6210_priv *wil)
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{
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struct net_device *ndev = wil_to_ndev(wil);
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wil_dbg_misc(wil, "%s()\n", __func__);
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netif_tx_stop_all_queues(ndev);
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netif_carrier_off(ndev);
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}
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static int __wil_up(struct wil6210_priv *wil)
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{
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struct net_device *ndev = wil_to_ndev(wil);
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struct wireless_dev *wdev = wil->wdev;
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int rc;
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rc = wil_reset(wil);
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if (rc)
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return rc;
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/* Rx VRING. After MAC and beacon */
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rc = wil_rx_init(wil);
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if (rc)
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return rc;
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switch (wdev->iftype) {
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case NL80211_IFTYPE_STATION:
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wil_dbg_misc(wil, "type: STATION\n");
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ndev->type = ARPHRD_ETHER;
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break;
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case NL80211_IFTYPE_AP:
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wil_dbg_misc(wil, "type: AP\n");
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ndev->type = ARPHRD_ETHER;
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break;
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case NL80211_IFTYPE_P2P_CLIENT:
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wil_dbg_misc(wil, "type: P2P_CLIENT\n");
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ndev->type = ARPHRD_ETHER;
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break;
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case NL80211_IFTYPE_P2P_GO:
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wil_dbg_misc(wil, "type: P2P_GO\n");
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ndev->type = ARPHRD_ETHER;
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break;
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case NL80211_IFTYPE_MONITOR:
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wil_dbg_misc(wil, "type: Monitor\n");
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ndev->type = ARPHRD_IEEE80211_RADIOTAP;
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/* ARPHRD_IEEE80211 or ARPHRD_IEEE80211_RADIOTAP ? */
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break;
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default:
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return -EOPNOTSUPP;
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}
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/* MAC address - pre-requisite for other commands */
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wmi_set_mac_address(wil, ndev->dev_addr);
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napi_enable(&wil->napi_rx);
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napi_enable(&wil->napi_tx);
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return 0;
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}
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int wil_up(struct wil6210_priv *wil)
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{
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int rc;
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mutex_lock(&wil->mutex);
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rc = __wil_up(wil);
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mutex_unlock(&wil->mutex);
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return rc;
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}
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static int __wil_down(struct wil6210_priv *wil)
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{
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napi_disable(&wil->napi_rx);
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napi_disable(&wil->napi_tx);
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if (wil->scan_request) {
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cfg80211_scan_done(wil->scan_request, true);
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wil->scan_request = NULL;
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}
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wil6210_disconnect(wil, NULL);
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wil_rx_fini(wil);
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return 0;
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}
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int wil_down(struct wil6210_priv *wil)
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{
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int rc;
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mutex_lock(&wil->mutex);
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rc = __wil_down(wil);
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mutex_unlock(&wil->mutex);
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return rc;
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}
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