2 * Copyright (c) 2005-2011 Atheros Communications Inc.
3 * Copyright (c) 2011-2017 Qualcomm Atheros, Inc.
5 * Permission to use, copy, modify, and/or distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
21 #include <linux/interrupt.h>
22 #include <linux/mutex.h>
29 * maximum number of bytes that can be
30 * handled atomically by DiagRead/DiagWrite
32 #define DIAG_TRANSFER_LIMIT 2048
42 * PCI-specific Target state
44 * NOTE: Structure is shared between Host software and Target firmware!
46 * Much of this may be of interest to the Host so
47 * HOST_INTEREST->hi_interconnect_state points here
48 * (and all members are 32-bit quantities in order to
49 * facilitate Host access). In particular, Host software is
50 * required to initialize pipe_cfg_addr and svc_to_pipe_map.
53 /* Pipe configuration Target address */
54 /* NB: ce_pipe_config[CE_COUNT] */
57 /* Service to pipe map Target address */
58 /* NB: service_to_pipe[PIPE_TO_CE_MAP_CN] */
61 /* number of MSI interrupts requested */
64 /* number of MSI interrupts granted */
67 /* Message Signalled Interrupt address */
74 * Data for firmware interrupt;
75 * MSI data for other interrupts are
76 * in various SoC registers
80 /* PCIE_PWR_METHOD_* */
81 u32 power_mgmt_method;
83 /* PCIE_CONFIG_FLAG_* */
87 /* PCIE_CONFIG_FLAG definitions */
88 #define PCIE_CONFIG_FLAG_ENABLE_L1 0x0000001
91 struct ath10k_pci_pipe {
92 /* Handle of underlying Copy Engine */
93 struct ath10k_ce_pipe *ce_hdl;
95 /* Our pipe number; facilitiates use of pipe_info ptrs. */
98 /* Convenience back pointer to hif_ce_state. */
99 struct ath10k *hif_ce_state;
103 /* protects compl_free and num_send_allowed */
104 spinlock_t pipe_lock;
107 struct ath10k_pci_supp_chip {
112 enum ath10k_pci_irq_mode {
113 ATH10K_PCI_IRQ_AUTO = 0,
114 ATH10K_PCI_IRQ_LEGACY = 1,
115 ATH10K_PCI_IRQ_MSI = 2,
119 struct pci_dev *pdev;
125 /* Operating interrupt mode */
126 enum ath10k_pci_irq_mode oper_irq_mode;
128 struct ath10k_pci_pipe pipe_info[CE_COUNT_MAX];
130 /* Copy Engine used for Diagnostic Accesses */
131 struct ath10k_ce_pipe *ce_diag;
132 /* For protecting ce_diag */
133 struct mutex ce_diag_mutex;
136 struct timer_list rx_post_retry;
138 /* Due to HW quirks it is recommended to disable ASPM during device
139 * bootup. To do that the original PCI-E Link Control is stored before
140 * device bootup is executed and re-programmed later.
144 /* Protects ps_awake and ps_wake_refcount */
147 /* The device has a special powersave-oriented register. When device is
148 * considered asleep it drains less power and driver is forbidden from
149 * accessing most MMIO registers. If host were to access them without
150 * waking up the device might scribble over host memory or return
151 * 0xdeadbeef readouts.
153 unsigned long ps_wake_refcount;
155 /* Waking up takes some time (up to 2ms in some cases) so it can be bad
156 * for latency. To mitigate this the device isn't immediately allowed
157 * to sleep after all references are undone - instead there's a grace
158 * period after which the powersave register is updated unless some
159 * activity to/from device happened in the meantime.
161 * Also see comments on ATH10K_PCI_SLEEP_GRACE_PERIOD_MSEC.
163 struct timer_list ps_timer;
165 /* MMIO registers are used to communicate with the device. With
166 * intensive traffic accessing powersave register would be a bit
167 * wasteful overhead and would needlessly stall CPU. It is far more
168 * efficient to rely on a variable in RAM and update it only upon
169 * powersave register state changes.
173 /* pci power save, disable for QCA988X and QCA99X0.
174 * Writing 'false' to this variable avoids frequent locking
175 * on MMIO read/write.
179 /* Chip specific pci reset routine used to do a safe reset */
180 int (*pci_soft_reset)(struct ath10k *ar);
182 /* Chip specific pci full reset function */
183 int (*pci_hard_reset)(struct ath10k *ar);
185 /* chip specific methods for converting target CPU virtual address
186 * space to CE address space
188 u32 (*targ_cpu_to_ce_addr)(struct ath10k *ar, u32 addr);
190 /* Keep this entry in the last, memory for struct ath10k_ahb is
191 * allocated (ahb support enabled case) in the continuation of
194 struct ath10k_ahb ahb[0];
197 static inline struct ath10k_pci *ath10k_pci_priv(struct ath10k *ar)
199 return (struct ath10k_pci *)ar->drv_priv;
202 #define ATH10K_PCI_RX_POST_RETRY_MS 50
203 #define ATH_PCI_RESET_WAIT_MAX 10 /* ms */
204 #define PCIE_WAKE_TIMEOUT 30000 /* 30ms */
205 #define PCIE_WAKE_LATE_US 10000 /* 10ms */
209 #define CDC_WAR_MAGIC_STR 0xceef0000
210 #define CDC_WAR_DATA_CE 4
212 /* Wait up to this many Ms for a Diagnostic Access CE operation to complete */
213 #define DIAG_ACCESS_CE_TIMEOUT_US 10000 /* 10 ms */
214 #define DIAG_ACCESS_CE_WAIT_US 50
216 void ath10k_pci_write32(struct ath10k *ar, u32 offset, u32 value);
217 void ath10k_pci_soc_write32(struct ath10k *ar, u32 addr, u32 val);
218 void ath10k_pci_reg_write32(struct ath10k *ar, u32 addr, u32 val);
220 u32 ath10k_pci_read32(struct ath10k *ar, u32 offset);
221 u32 ath10k_pci_soc_read32(struct ath10k *ar, u32 addr);
222 u32 ath10k_pci_reg_read32(struct ath10k *ar, u32 addr);
224 int ath10k_pci_hif_tx_sg(struct ath10k *ar, u8 pipe_id,
225 struct ath10k_hif_sg_item *items, int n_items);
226 int ath10k_pci_hif_diag_read(struct ath10k *ar, u32 address, void *buf,
228 int ath10k_pci_diag_write_mem(struct ath10k *ar, u32 address,
229 const void *data, int nbytes);
230 int ath10k_pci_hif_exchange_bmi_msg(struct ath10k *ar, void *req, u32 req_len,
231 void *resp, u32 *resp_len);
232 int ath10k_pci_hif_map_service_to_pipe(struct ath10k *ar, u16 service_id,
233 u8 *ul_pipe, u8 *dl_pipe);
234 void ath10k_pci_hif_get_default_pipe(struct ath10k *ar, u8 *ul_pipe,
236 void ath10k_pci_hif_send_complete_check(struct ath10k *ar, u8 pipe,
238 u16 ath10k_pci_hif_get_free_queue_number(struct ath10k *ar, u8 pipe);
239 void ath10k_pci_hif_power_down(struct ath10k *ar);
240 int ath10k_pci_alloc_pipes(struct ath10k *ar);
241 void ath10k_pci_free_pipes(struct ath10k *ar);
242 void ath10k_pci_free_pipes(struct ath10k *ar);
243 void ath10k_pci_rx_replenish_retry(struct timer_list *t);
244 void ath10k_pci_ce_deinit(struct ath10k *ar);
245 void ath10k_pci_init_napi(struct ath10k *ar);
246 int ath10k_pci_init_pipes(struct ath10k *ar);
247 int ath10k_pci_init_config(struct ath10k *ar);
248 void ath10k_pci_rx_post(struct ath10k *ar);
249 void ath10k_pci_flush(struct ath10k *ar);
250 void ath10k_pci_enable_legacy_irq(struct ath10k *ar);
251 bool ath10k_pci_irq_pending(struct ath10k *ar);
252 void ath10k_pci_disable_and_clear_legacy_irq(struct ath10k *ar);
253 void ath10k_pci_irq_msi_fw_mask(struct ath10k *ar);
254 int ath10k_pci_wait_for_target_init(struct ath10k *ar);
255 int ath10k_pci_setup_resource(struct ath10k *ar);
256 void ath10k_pci_release_resource(struct ath10k *ar);
258 /* QCA6174 is known to have Tx/Rx issues when SOC_WAKE register is poked too
259 * frequently. To avoid this put SoC to sleep after a very conservative grace
260 * period. Adjust with great care.
262 #define ATH10K_PCI_SLEEP_GRACE_PERIOD_MSEC 60