1 /* SPDX-License-Identifier: ISC */ 2 /* 3 * Copyright (c) 2005-2011 Atheros Communications Inc. 4 * Copyright (c) 2011-2017 Qualcomm Atheros, Inc. 5 */ 6 7 #ifndef _PCI_H_ 8 #define _PCI_H_ 9 10 #include <linux/interrupt.h> 11 #include <linux/mutex.h> 12 13 #include "hw.h" 14 #include "ce.h" 15 #include "ahb.h" 16 17 /* 18 * maximum number of bytes that can be 19 * handled atomically by DiagRead/DiagWrite 20 */ 21 #define DIAG_TRANSFER_LIMIT 2048 22 23 struct bmi_xfer { 24 bool tx_done; 25 bool rx_done; 26 bool wait_for_resp; 27 u32 resp_len; 28 }; 29 30 /* 31 * PCI-specific Target state 32 * 33 * NOTE: Structure is shared between Host software and Target firmware! 34 * 35 * Much of this may be of interest to the Host so 36 * HOST_INTEREST->hi_interconnect_state points here 37 * (and all members are 32-bit quantities in order to 38 * facilitate Host access). In particular, Host software is 39 * required to initialize pipe_cfg_addr and svc_to_pipe_map. 40 */ 41 struct pcie_state { 42 /* Pipe configuration Target address */ 43 /* NB: ce_pipe_config[CE_COUNT] */ 44 u32 pipe_cfg_addr; 45 46 /* Service to pipe map Target address */ 47 /* NB: service_to_pipe[PIPE_TO_CE_MAP_CN] */ 48 u32 svc_to_pipe_map; 49 50 /* number of MSI interrupts requested */ 51 u32 msi_requested; 52 53 /* number of MSI interrupts granted */ 54 u32 msi_granted; 55 56 /* Message Signalled Interrupt address */ 57 u32 msi_addr; 58 59 /* Base data */ 60 u32 msi_data; 61 62 /* 63 * Data for firmware interrupt; 64 * MSI data for other interrupts are 65 * in various SoC registers 66 */ 67 u32 msi_fw_intr_data; 68 69 /* PCIE_PWR_METHOD_* */ 70 u32 power_mgmt_method; 71 72 /* PCIE_CONFIG_FLAG_* */ 73 u32 config_flags; 74 }; 75 76 /* PCIE_CONFIG_FLAG definitions */ 77 #define PCIE_CONFIG_FLAG_ENABLE_L1 0x0000001 78 79 /* Per-pipe state. */ 80 struct ath10k_pci_pipe { 81 /* Handle of underlying Copy Engine */ 82 struct ath10k_ce_pipe *ce_hdl; 83 84 /* Our pipe number; facilitates use of pipe_info ptrs. */ 85 u8 pipe_num; 86 87 /* Convenience back pointer to hif_ce_state. */ 88 struct ath10k *hif_ce_state; 89 90 size_t buf_sz; 91 92 /* protects compl_free and num_send_allowed */ 93 spinlock_t pipe_lock; 94 }; 95 96 struct ath10k_pci_supp_chip { 97 u32 dev_id; 98 u32 rev_id; 99 }; 100 101 enum ath10k_pci_irq_mode { 102 ATH10K_PCI_IRQ_AUTO = 0, 103 ATH10K_PCI_IRQ_LEGACY = 1, 104 ATH10K_PCI_IRQ_MSI = 2, 105 }; 106 107 struct ath10k_pci { 108 struct pci_dev *pdev; 109 struct device *dev; 110 struct ath10k *ar; 111 void __iomem *mem; 112 size_t mem_len; 113 114 /* Operating interrupt mode */ 115 enum ath10k_pci_irq_mode oper_irq_mode; 116 117 struct ath10k_pci_pipe pipe_info[CE_COUNT_MAX]; 118 119 /* Copy Engine used for Diagnostic Accesses */ 120 struct ath10k_ce_pipe *ce_diag; 121 /* For protecting ce_diag */ 122 struct mutex ce_diag_mutex; 123 124 struct work_struct dump_work; 125 126 struct ath10k_ce ce; 127 struct timer_list rx_post_retry; 128 129 /* Due to HW quirks it is recommended to disable ASPM during device 130 * bootup. To do that the original PCI-E Link Control is stored before 131 * device bootup is executed and re-programmed later. 132 */ 133 u16 link_ctl; 134 135 /* Protects ps_awake and ps_wake_refcount */ 136 spinlock_t ps_lock; 137 138 /* The device has a special powersave-oriented register. When device is 139 * considered asleep it drains less power and driver is forbidden from 140 * accessing most MMIO registers. If host were to access them without 141 * waking up the device might scribble over host memory or return 142 * 0xdeadbeef readouts. 143 */ 144 unsigned long ps_wake_refcount; 145 146 /* Waking up takes some time (up to 2ms in some cases) so it can be bad 147 * for latency. To mitigate this the device isn't immediately allowed 148 * to sleep after all references are undone - instead there's a grace 149 * period after which the powersave register is updated unless some 150 * activity to/from device happened in the meantime. 151 * 152 * Also see comments on ATH10K_PCI_SLEEP_GRACE_PERIOD_MSEC. 153 */ 154 struct timer_list ps_timer; 155 156 /* MMIO registers are used to communicate with the device. With 157 * intensive traffic accessing powersave register would be a bit 158 * wasteful overhead and would needlessly stall CPU. It is far more 159 * efficient to rely on a variable in RAM and update it only upon 160 * powersave register state changes. 161 */ 162 bool ps_awake; 163 164 /* pci power save, disable for QCA988X and QCA99X0. 165 * Writing 'false' to this variable avoids frequent locking 166 * on MMIO read/write. 167 */ 168 bool pci_ps; 169 170 /* Chip specific pci reset routine used to do a safe reset */ 171 int (*pci_soft_reset)(struct ath10k *ar); 172 173 /* Chip specific pci full reset function */ 174 int (*pci_hard_reset)(struct ath10k *ar); 175 176 /* chip specific methods for converting target CPU virtual address 177 * space to CE address space 178 */ 179 u32 (*targ_cpu_to_ce_addr)(struct ath10k *ar, u32 addr); 180 181 struct ce_attr *attr; 182 struct ce_pipe_config *pipe_config; 183 struct ce_service_to_pipe *serv_to_pipe; 184 185 /* Keep this entry in the last, memory for struct ath10k_ahb is 186 * allocated (ahb support enabled case) in the continuation of 187 * this struct. 188 */ 189 struct ath10k_ahb ahb[]; 190 191 }; 192 193 static inline struct ath10k_pci *ath10k_pci_priv(struct ath10k *ar) 194 { 195 return (struct ath10k_pci *)ar->drv_priv; 196 } 197 198 #define ATH10K_PCI_RX_POST_RETRY_MS 50 199 #define ATH_PCI_RESET_WAIT_MAX 10 /* ms */ 200 #define PCIE_WAKE_TIMEOUT 30000 /* 30ms */ 201 #define PCIE_WAKE_LATE_US 10000 /* 10ms */ 202 203 #define BAR_NUM 0 204 205 #define CDC_WAR_MAGIC_STR 0xceef0000 206 #define CDC_WAR_DATA_CE 4 207 208 /* Wait up to this many Ms for a Diagnostic Access CE operation to complete */ 209 #define DIAG_ACCESS_CE_TIMEOUT_US 10000 /* 10 ms */ 210 #define DIAG_ACCESS_CE_WAIT_US 50 211 212 void ath10k_pci_write32(struct ath10k *ar, u32 offset, u32 value); 213 void ath10k_pci_soc_write32(struct ath10k *ar, u32 addr, u32 val); 214 void ath10k_pci_reg_write32(struct ath10k *ar, u32 addr, u32 val); 215 216 u32 ath10k_pci_read32(struct ath10k *ar, u32 offset); 217 u32 ath10k_pci_soc_read32(struct ath10k *ar, u32 addr); 218 u32 ath10k_pci_reg_read32(struct ath10k *ar, u32 addr); 219 220 int ath10k_pci_hif_tx_sg(struct ath10k *ar, u8 pipe_id, 221 struct ath10k_hif_sg_item *items, int n_items); 222 int ath10k_pci_hif_diag_read(struct ath10k *ar, u32 address, void *buf, 223 size_t buf_len); 224 int ath10k_pci_diag_write_mem(struct ath10k *ar, u32 address, 225 const void *data, int nbytes); 226 int ath10k_pci_hif_exchange_bmi_msg(struct ath10k *ar, void *req, u32 req_len, 227 void *resp, u32 *resp_len); 228 int ath10k_pci_hif_map_service_to_pipe(struct ath10k *ar, u16 service_id, 229 u8 *ul_pipe, u8 *dl_pipe); 230 void ath10k_pci_hif_get_default_pipe(struct ath10k *ar, u8 *ul_pipe, 231 u8 *dl_pipe); 232 void ath10k_pci_hif_send_complete_check(struct ath10k *ar, u8 pipe, 233 int force); 234 u16 ath10k_pci_hif_get_free_queue_number(struct ath10k *ar, u8 pipe); 235 void ath10k_pci_hif_power_down(struct ath10k *ar); 236 int ath10k_pci_alloc_pipes(struct ath10k *ar); 237 void ath10k_pci_free_pipes(struct ath10k *ar); 238 void ath10k_pci_rx_replenish_retry(struct timer_list *t); 239 void ath10k_pci_ce_deinit(struct ath10k *ar); 240 void ath10k_pci_init_napi(struct ath10k *ar); 241 int ath10k_pci_init_pipes(struct ath10k *ar); 242 int ath10k_pci_init_config(struct ath10k *ar); 243 void ath10k_pci_rx_post(struct ath10k *ar); 244 void ath10k_pci_flush(struct ath10k *ar); 245 void ath10k_pci_enable_legacy_irq(struct ath10k *ar); 246 bool ath10k_pci_irq_pending(struct ath10k *ar); 247 void ath10k_pci_disable_and_clear_legacy_irq(struct ath10k *ar); 248 void ath10k_pci_irq_msi_fw_mask(struct ath10k *ar); 249 int ath10k_pci_wait_for_target_init(struct ath10k *ar); 250 int ath10k_pci_setup_resource(struct ath10k *ar); 251 void ath10k_pci_release_resource(struct ath10k *ar); 252 253 /* QCA6174 is known to have Tx/Rx issues when SOC_WAKE register is poked too 254 * frequently. To avoid this put SoC to sleep after a very conservative grace 255 * period. Adjust with great care. 256 */ 257 #define ATH10K_PCI_SLEEP_GRACE_PERIOD_MSEC 60 258 259 #endif /* _PCI_H_ */ 260