1 /* @file mwifiex_pcie.h
2  *
3  * @brief This file contains definitions for PCI-E interface.
4  * driver.
5  *
6  * Copyright 2011-2020 NXP
7  *
8  * This software file (the "File") is distributed by NXP
9  * under the terms of the GNU General Public License Version 2, June 1991
10  * (the "License").  You may use, redistribute and/or modify this File in
11  * accordance with the terms and conditions of the License, a copy of which
12  * is available by writing to the Free Software Foundation, Inc.,
13  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
14  * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
15  *
16  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
17  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
18  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
19  * this warranty disclaimer.
20  */
21 
22 #ifndef	_MWIFIEX_PCIE_H
23 #define	_MWIFIEX_PCIE_H
24 
25 #include    <linux/completion.h>
26 #include    <linux/pci.h>
27 #include    <linux/interrupt.h>
28 
29 #include    "decl.h"
30 #include    "main.h"
31 
32 #define PCIE8766_DEFAULT_FW_NAME "mrvl/pcie8766_uapsta.bin"
33 #define PCIE8897_DEFAULT_FW_NAME "mrvl/pcie8897_uapsta.bin"
34 #define PCIE8897_A0_FW_NAME "mrvl/pcie8897_uapsta_a0.bin"
35 #define PCIE8897_B0_FW_NAME "mrvl/pcie8897_uapsta.bin"
36 #define PCIEUART8997_FW_NAME_V4 "mrvl/pcieuart8997_combo_v4.bin"
37 #define PCIEUSB8997_FW_NAME_V4 "mrvl/pcieusb8997_combo_v4.bin"
38 
39 #define PCIE_VENDOR_ID_MARVELL              (0x11ab)
40 #define PCIE_VENDOR_ID_V2_MARVELL           (0x1b4b)
41 #define PCIE_DEVICE_ID_MARVELL_88W8766P		(0x2b30)
42 #define PCIE_DEVICE_ID_MARVELL_88W8897		(0x2b38)
43 #define PCIE_DEVICE_ID_MARVELL_88W8997		(0x2b42)
44 
45 #define PCIE8897_A0	0x1100
46 #define PCIE8897_B0	0x1200
47 #define PCIE8997_A0	0x10
48 #define PCIE8997_A1	0x11
49 #define CHIP_VER_PCIEUART	0x3
50 #define CHIP_MAGIC_VALUE	0x24
51 
52 /* Constants for Buffer Descriptor (BD) rings */
53 #define MWIFIEX_MAX_TXRX_BD			0x20
54 #define MWIFIEX_TXBD_MASK			0x3F
55 #define MWIFIEX_RXBD_MASK			0x3F
56 
57 #define MWIFIEX_MAX_EVT_BD			0x08
58 #define MWIFIEX_EVTBD_MASK			0x0f
59 
60 /* PCIE INTERNAL REGISTERS */
61 #define PCIE_SCRATCH_0_REG				0xC10
62 #define PCIE_SCRATCH_1_REG				0xC14
63 #define PCIE_CPU_INT_EVENT				0xC18
64 #define PCIE_CPU_INT_STATUS				0xC1C
65 #define PCIE_HOST_INT_STATUS				0xC30
66 #define PCIE_HOST_INT_MASK				0xC34
67 #define PCIE_HOST_INT_STATUS_MASK			0xC3C
68 #define PCIE_SCRATCH_2_REG				0xC40
69 #define PCIE_SCRATCH_3_REG				0xC44
70 #define PCIE_SCRATCH_4_REG				0xCD0
71 #define PCIE_SCRATCH_5_REG				0xCD4
72 #define PCIE_SCRATCH_6_REG				0xCD8
73 #define PCIE_SCRATCH_7_REG				0xCDC
74 #define PCIE_SCRATCH_8_REG				0xCE0
75 #define PCIE_SCRATCH_9_REG				0xCE4
76 #define PCIE_SCRATCH_10_REG				0xCE8
77 #define PCIE_SCRATCH_11_REG				0xCEC
78 #define PCIE_SCRATCH_12_REG				0xCF0
79 #define PCIE_SCRATCH_13_REG				0xCF4
80 #define PCIE_SCRATCH_14_REG				0xCF8
81 #define PCIE_SCRATCH_15_REG				0xCFC
82 #define PCIE_RD_DATA_PTR_Q0_Q1                          0xC08C
83 #define PCIE_WR_DATA_PTR_Q0_Q1                          0xC05C
84 
85 #define CPU_INTR_DNLD_RDY				BIT(0)
86 #define CPU_INTR_DOOR_BELL				BIT(1)
87 #define CPU_INTR_SLEEP_CFM_DONE			BIT(2)
88 #define CPU_INTR_RESET					BIT(3)
89 #define CPU_INTR_EVENT_DONE				BIT(5)
90 
91 #define HOST_INTR_DNLD_DONE				BIT(0)
92 #define HOST_INTR_UPLD_RDY				BIT(1)
93 #define HOST_INTR_CMD_DONE				BIT(2)
94 #define HOST_INTR_EVENT_RDY				BIT(3)
95 #define HOST_INTR_MASK					(HOST_INTR_DNLD_DONE | \
96 							 HOST_INTR_UPLD_RDY  | \
97 							 HOST_INTR_CMD_DONE  | \
98 							 HOST_INTR_EVENT_RDY)
99 
100 #define MWIFIEX_BD_FLAG_ROLLOVER_IND			BIT(7)
101 #define MWIFIEX_BD_FLAG_FIRST_DESC			BIT(0)
102 #define MWIFIEX_BD_FLAG_LAST_DESC			BIT(1)
103 #define MWIFIEX_BD_FLAG_SOP				BIT(0)
104 #define MWIFIEX_BD_FLAG_EOP				BIT(1)
105 #define MWIFIEX_BD_FLAG_XS_SOP				BIT(2)
106 #define MWIFIEX_BD_FLAG_XS_EOP				BIT(3)
107 #define MWIFIEX_BD_FLAG_EVT_ROLLOVER_IND		BIT(7)
108 #define MWIFIEX_BD_FLAG_RX_ROLLOVER_IND			BIT(10)
109 #define MWIFIEX_BD_FLAG_TX_START_PTR			BIT(16)
110 #define MWIFIEX_BD_FLAG_TX_ROLLOVER_IND			BIT(26)
111 
112 /* Max retry number of command write */
113 #define MAX_WRITE_IOMEM_RETRY				2
114 /* Define PCIE block size for firmware download */
115 #define MWIFIEX_PCIE_BLOCK_SIZE_FW_DNLD		256
116 /* FW awake cookie after FW ready */
117 #define FW_AWAKE_COOKIE						(0xAA55AA55)
118 #define MWIFIEX_DEF_SLEEP_COOKIE			0xBEEFBEEF
119 #define MWIFIEX_SLEEP_COOKIE_SIZE			4
120 #define MWIFIEX_MAX_DELAY_COUNT				100
121 
122 #define MWIFIEX_PCIE_FLR_HAPPENS 0xFEDCBABA
123 
124 struct mwifiex_pcie_card_reg {
125 	u16 cmd_addr_lo;
126 	u16 cmd_addr_hi;
127 	u16 fw_status;
128 	u16 cmd_size;
129 	u16 cmdrsp_addr_lo;
130 	u16 cmdrsp_addr_hi;
131 	u16 tx_rdptr;
132 	u16 tx_wrptr;
133 	u16 rx_rdptr;
134 	u16 rx_wrptr;
135 	u16 evt_rdptr;
136 	u16 evt_wrptr;
137 	u16 drv_rdy;
138 	u16 tx_start_ptr;
139 	u32 tx_mask;
140 	u32 tx_wrap_mask;
141 	u32 rx_mask;
142 	u32 rx_wrap_mask;
143 	u32 tx_rollover_ind;
144 	u32 rx_rollover_ind;
145 	u32 evt_rollover_ind;
146 	u8 ring_flag_sop;
147 	u8 ring_flag_eop;
148 	u8 ring_flag_xs_sop;
149 	u8 ring_flag_xs_eop;
150 	u32 ring_tx_start_ptr;
151 	u8 pfu_enabled;
152 	u8 sleep_cookie;
153 	u16 fw_dump_ctrl;
154 	u16 fw_dump_start;
155 	u16 fw_dump_end;
156 	u8 fw_dump_host_ready;
157 	u8 fw_dump_read_done;
158 	u8 msix_support;
159 };
160 
161 struct mwifiex_pcie_device {
162 	const struct mwifiex_pcie_card_reg *reg;
163 	u16 blksz_fw_dl;
164 	u16 tx_buf_size;
165 	bool can_dump_fw;
166 	struct memory_type_mapping *mem_type_mapping_tbl;
167 	u8 num_mem_types;
168 	bool can_ext_scan;
169 };
170 
171 struct mwifiex_evt_buf_desc {
172 	u64 paddr;
173 	u16 len;
174 	u16 flags;
175 } __packed;
176 
177 struct mwifiex_pcie_buf_desc {
178 	u64 paddr;
179 	u16 len;
180 	u16 flags;
181 } __packed;
182 
183 struct mwifiex_pfu_buf_desc {
184 	u16 flags;
185 	u16 offset;
186 	u16 frag_len;
187 	u16 len;
188 	u64 paddr;
189 	u32 reserved;
190 } __packed;
191 
192 #define MWIFIEX_NUM_MSIX_VECTORS   4
193 
194 struct mwifiex_msix_context {
195 	struct pci_dev *dev;
196 	u16 msg_id;
197 };
198 
199 struct pcie_service_card {
200 	struct pci_dev *dev;
201 	struct mwifiex_adapter *adapter;
202 	struct mwifiex_pcie_device pcie;
203 	struct completion fw_done;
204 
205 	u8 txbd_flush;
206 	u32 txbd_wrptr;
207 	u32 txbd_rdptr;
208 	u32 txbd_ring_size;
209 	u8 *txbd_ring_vbase;
210 	dma_addr_t txbd_ring_pbase;
211 	void *txbd_ring[MWIFIEX_MAX_TXRX_BD];
212 	struct sk_buff *tx_buf_list[MWIFIEX_MAX_TXRX_BD];
213 
214 	u32 rxbd_wrptr;
215 	u32 rxbd_rdptr;
216 	u32 rxbd_ring_size;
217 	u8 *rxbd_ring_vbase;
218 	dma_addr_t rxbd_ring_pbase;
219 	void *rxbd_ring[MWIFIEX_MAX_TXRX_BD];
220 	struct sk_buff *rx_buf_list[MWIFIEX_MAX_TXRX_BD];
221 
222 	u32 evtbd_wrptr;
223 	u32 evtbd_rdptr;
224 	u32 evtbd_ring_size;
225 	u8 *evtbd_ring_vbase;
226 	dma_addr_t evtbd_ring_pbase;
227 	void *evtbd_ring[MWIFIEX_MAX_EVT_BD];
228 	struct sk_buff *evt_buf_list[MWIFIEX_MAX_EVT_BD];
229 
230 	struct sk_buff *cmd_buf;
231 	struct sk_buff *cmdrsp_buf;
232 	u8 *sleep_cookie_vbase;
233 	dma_addr_t sleep_cookie_pbase;
234 	void __iomem *pci_mmap;
235 	void __iomem *pci_mmap1;
236 	int msi_enable;
237 	int msix_enable;
238 #ifdef CONFIG_PCI
239 	struct msix_entry msix_entries[MWIFIEX_NUM_MSIX_VECTORS];
240 #endif
241 	struct mwifiex_msix_context msix_ctx[MWIFIEX_NUM_MSIX_VECTORS];
242 	struct mwifiex_msix_context share_irq_ctx;
243 	struct work_struct work;
244 	unsigned long work_flags;
245 
246 	bool pci_reset_ongoing;
247 	unsigned long quirks;
248 };
249 
250 static inline int
mwifiex_pcie_txbd_empty(struct pcie_service_card * card,u32 rdptr)251 mwifiex_pcie_txbd_empty(struct pcie_service_card *card, u32 rdptr)
252 {
253 	const struct mwifiex_pcie_card_reg *reg = card->pcie.reg;
254 
255 	switch (card->dev->device) {
256 	case PCIE_DEVICE_ID_MARVELL_88W8766P:
257 		if (((card->txbd_wrptr & reg->tx_mask) ==
258 		     (rdptr & reg->tx_mask)) &&
259 		    ((card->txbd_wrptr & reg->tx_rollover_ind) !=
260 		     (rdptr & reg->tx_rollover_ind)))
261 			return 1;
262 		break;
263 	case PCIE_DEVICE_ID_MARVELL_88W8897:
264 	case PCIE_DEVICE_ID_MARVELL_88W8997:
265 		if (((card->txbd_wrptr & reg->tx_mask) ==
266 		     (rdptr & reg->tx_mask)) &&
267 		    ((card->txbd_wrptr & reg->tx_rollover_ind) ==
268 			(rdptr & reg->tx_rollover_ind)))
269 			return 1;
270 		break;
271 	}
272 
273 	return 0;
274 }
275 
276 static inline int
mwifiex_pcie_txbd_not_full(struct pcie_service_card * card)277 mwifiex_pcie_txbd_not_full(struct pcie_service_card *card)
278 {
279 	const struct mwifiex_pcie_card_reg *reg = card->pcie.reg;
280 
281 	switch (card->dev->device) {
282 	case PCIE_DEVICE_ID_MARVELL_88W8766P:
283 		if (((card->txbd_wrptr & reg->tx_mask) !=
284 		     (card->txbd_rdptr & reg->tx_mask)) ||
285 		    ((card->txbd_wrptr & reg->tx_rollover_ind) !=
286 		     (card->txbd_rdptr & reg->tx_rollover_ind)))
287 			return 1;
288 		break;
289 	case PCIE_DEVICE_ID_MARVELL_88W8897:
290 	case PCIE_DEVICE_ID_MARVELL_88W8997:
291 		if (((card->txbd_wrptr & reg->tx_mask) !=
292 		     (card->txbd_rdptr & reg->tx_mask)) ||
293 		    ((card->txbd_wrptr & reg->tx_rollover_ind) ==
294 		     (card->txbd_rdptr & reg->tx_rollover_ind)))
295 			return 1;
296 		break;
297 	}
298 
299 	return 0;
300 }
301 
302 #endif /* _MWIFIEX_PCIE_H */
303