1 /*
2  * This file is part of the Chelsio FCoE driver for Linux.
3  *
4  * Copyright (c) 2008-2013 Chelsio Communications, Inc. All rights reserved.
5  *
6  * This software is available to you under a choice of one of two
7  * licenses.  You may choose to be licensed under the terms of the GNU
8  * General Public License (GPL) Version 2, available from the file
9  * OpenIB.org BSD license below:
10  *
11  *     Redistribution and use in source and binary forms, with or
12  *     without modification, are permitted provided that the following
13  *     conditions are met:
14  *
15  *      - Redistributions of source code must retain the above
16  *        copyright notice, this list of conditions and the following
17  *        disclaimer.
18  *
19  *      - Redistributions in binary form must reproduce the above
20  *        copyright notice, this list of conditions and the following
21  *        disclaimer in the documentation and/or other materials
22  *        provided with the distribution.
23  *
24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31  * SOFTWARE.
32  */
33 
34 #include "csio_hw.h"
35 #include "csio_init.h"
36 
37 static int
38 csio_t5_set_mem_win(struct csio_hw *hw, uint32_t win)
39 {
40 	u32 mem_win_base;
41 	/*
42 	 * Truncation intentional: we only read the bottom 32-bits of the
43 	 * 64-bit BAR0/BAR1 ...  We use the hardware backdoor mechanism to
44 	 * read BAR0 instead of using pci_resource_start() because we could be
45 	 * operating from within a Virtual Machine which is trapping our
46 	 * accesses to our Configuration Space and we need to set up the PCI-E
47 	 * Memory Window decoders with the actual addresses which will be
48 	 * coming across the PCI-E link.
49 	 */
50 
51 	/* For T5, only relative offset inside the PCIe BAR is passed */
52 	mem_win_base = MEMWIN_BASE;
53 
54 	/*
55 	 * Set up memory window for accessing adapter memory ranges.  (Read
56 	 * back MA register to ensure that changes propagate before we attempt
57 	 * to use the new values.)
58 	 */
59 	csio_wr_reg32(hw, mem_win_base | BIR_V(0) |
60 			  WINDOW_V(ilog2(MEMWIN_APERTURE) - 10),
61 			  PCIE_MEM_ACCESS_REG(PCIE_MEM_ACCESS_BASE_WIN_A, win));
62 	csio_rd_reg32(hw,
63 		      PCIE_MEM_ACCESS_REG(PCIE_MEM_ACCESS_BASE_WIN_A, win));
64 
65 	return 0;
66 }
67 
68 /*
69  * Interrupt handler for the PCIE module.
70  */
71 static void
72 csio_t5_pcie_intr_handler(struct csio_hw *hw)
73 {
74 	static struct intr_info pcie_intr_info[] = {
75 		{ MSTGRPPERR_F, "Master Response Read Queue parity error",
76 		-1, 1 },
77 		{ MSTTIMEOUTPERR_F, "Master Timeout FIFO parity error", -1, 1 },
78 		{ MSIXSTIPERR_F, "MSI-X STI SRAM parity error", -1, 1 },
79 		{ MSIXADDRLPERR_F, "MSI-X AddrL parity error", -1, 1 },
80 		{ MSIXADDRHPERR_F, "MSI-X AddrH parity error", -1, 1 },
81 		{ MSIXDATAPERR_F, "MSI-X data parity error", -1, 1 },
82 		{ MSIXDIPERR_F, "MSI-X DI parity error", -1, 1 },
83 		{ PIOCPLGRPPERR_F, "PCI PIO completion Group FIFO parity error",
84 		-1, 1 },
85 		{ PIOREQGRPPERR_F, "PCI PIO request Group FIFO parity error",
86 		-1, 1 },
87 		{ TARTAGPERR_F, "PCI PCI target tag FIFO parity error", -1, 1 },
88 		{ MSTTAGQPERR_F, "PCI master tag queue parity error", -1, 1 },
89 		{ CREQPERR_F, "PCI CMD channel request parity error", -1, 1 },
90 		{ CRSPPERR_F, "PCI CMD channel response parity error", -1, 1 },
91 		{ DREQWRPERR_F, "PCI DMA channel write request parity error",
92 		-1, 1 },
93 		{ DREQPERR_F, "PCI DMA channel request parity error", -1, 1 },
94 		{ DRSPPERR_F, "PCI DMA channel response parity error", -1, 1 },
95 		{ HREQWRPERR_F, "PCI HMA channel count parity error", -1, 1 },
96 		{ HREQPERR_F, "PCI HMA channel request parity error", -1, 1 },
97 		{ HRSPPERR_F, "PCI HMA channel response parity error", -1, 1 },
98 		{ CFGSNPPERR_F, "PCI config snoop FIFO parity error", -1, 1 },
99 		{ FIDPERR_F, "PCI FID parity error", -1, 1 },
100 		{ VFIDPERR_F, "PCI INTx clear parity error", -1, 1 },
101 		{ MAGRPPERR_F, "PCI MA group FIFO parity error", -1, 1 },
102 		{ PIOTAGPERR_F, "PCI PIO tag parity error", -1, 1 },
103 		{ IPRXHDRGRPPERR_F, "PCI IP Rx header group parity error",
104 		-1, 1 },
105 		{ IPRXDATAGRPPERR_F, "PCI IP Rx data group parity error",
106 		-1, 1 },
107 		{ RPLPERR_F, "PCI IP replay buffer parity error", -1, 1 },
108 		{ IPSOTPERR_F, "PCI IP SOT buffer parity error", -1, 1 },
109 		{ TRGT1GRPPERR_F, "PCI TRGT1 group FIFOs parity error", -1, 1 },
110 		{ READRSPERR_F, "Outbound read error", -1, 0 },
111 		{ 0, NULL, 0, 0 }
112 	};
113 
114 	int fat;
115 	fat = csio_handle_intr_status(hw, PCIE_INT_CAUSE_A, pcie_intr_info);
116 	if (fat)
117 		csio_hw_fatal_err(hw);
118 }
119 
120 /*
121  * csio_t5_flash_cfg_addr - return the address of the flash configuration file
122  * @hw: the HW module
123  *
124  * Return the address within the flash where the Firmware Configuration
125  * File is stored.
126  */
127 static unsigned int
128 csio_t5_flash_cfg_addr(struct csio_hw *hw)
129 {
130 	return FLASH_CFG_START;
131 }
132 
133 /*
134  *      csio_t5_mc_read - read from MC through backdoor accesses
135  *      @hw: the hw module
136  *      @idx: index to the register
137  *      @addr: address of first byte requested
138  *      @data: 64 bytes of data containing the requested address
139  *      @ecc: where to store the corresponding 64-bit ECC word
140  *
141  *      Read 64 bytes of data from MC starting at a 64-byte-aligned address
142  *      that covers the requested address @addr.  If @parity is not %NULL it
143  *      is assigned the 64-bit ECC word for the read data.
144  */
145 static int
146 csio_t5_mc_read(struct csio_hw *hw, int idx, uint32_t addr, __be32 *data,
147 		uint64_t *ecc)
148 {
149 	int i;
150 	uint32_t mc_bist_cmd_reg, mc_bist_cmd_addr_reg, mc_bist_cmd_len_reg;
151 	uint32_t mc_bist_data_pattern_reg;
152 
153 	mc_bist_cmd_reg = MC_REG(MC_P_BIST_CMD_A, idx);
154 	mc_bist_cmd_addr_reg = MC_REG(MC_P_BIST_CMD_ADDR_A, idx);
155 	mc_bist_cmd_len_reg = MC_REG(MC_P_BIST_CMD_LEN_A, idx);
156 	mc_bist_data_pattern_reg = MC_REG(MC_P_BIST_DATA_PATTERN_A, idx);
157 
158 	if (csio_rd_reg32(hw, mc_bist_cmd_reg) & START_BIST_F)
159 		return -EBUSY;
160 	csio_wr_reg32(hw, addr & ~0x3fU, mc_bist_cmd_addr_reg);
161 	csio_wr_reg32(hw, 64, mc_bist_cmd_len_reg);
162 	csio_wr_reg32(hw, 0xc, mc_bist_data_pattern_reg);
163 	csio_wr_reg32(hw, BIST_OPCODE_V(1) | START_BIST_F |  BIST_CMD_GAP_V(1),
164 		      mc_bist_cmd_reg);
165 	i = csio_hw_wait_op_done_val(hw, mc_bist_cmd_reg, START_BIST_F,
166 				     0, 10, 1, NULL);
167 	if (i)
168 		return i;
169 
170 #define MC_DATA(i) MC_BIST_STATUS_REG(MC_BIST_STATUS_RDATA_A, i)
171 
172 	for (i = 15; i >= 0; i--)
173 		*data++ = htonl(csio_rd_reg32(hw, MC_DATA(i)));
174 	if (ecc)
175 		*ecc = csio_rd_reg64(hw, MC_DATA(16));
176 #undef MC_DATA
177 	return 0;
178 }
179 
180 /*
181  *      csio_t5_edc_read - read from EDC through backdoor accesses
182  *      @hw: the hw module
183  *      @idx: which EDC to access
184  *      @addr: address of first byte requested
185  *      @data: 64 bytes of data containing the requested address
186  *      @ecc: where to store the corresponding 64-bit ECC word
187  *
188  *      Read 64 bytes of data from EDC starting at a 64-byte-aligned address
189  *      that covers the requested address @addr.  If @parity is not %NULL it
190  *      is assigned the 64-bit ECC word for the read data.
191  */
192 static int
193 csio_t5_edc_read(struct csio_hw *hw, int idx, uint32_t addr, __be32 *data,
194 		uint64_t *ecc)
195 {
196 	int i;
197 	uint32_t edc_bist_cmd_reg, edc_bist_cmd_addr_reg, edc_bist_cmd_len_reg;
198 	uint32_t edc_bist_cmd_data_pattern;
199 
200 /*
201  * These macro are missing in t4_regs.h file.
202  */
203 #define EDC_STRIDE_T5 (EDC_T51_BASE_ADDR - EDC_T50_BASE_ADDR)
204 #define EDC_REG_T5(reg, idx) (reg + EDC_STRIDE_T5 * idx)
205 
206 	edc_bist_cmd_reg = EDC_REG_T5(EDC_H_BIST_CMD_A, idx);
207 	edc_bist_cmd_addr_reg = EDC_REG_T5(EDC_H_BIST_CMD_ADDR_A, idx);
208 	edc_bist_cmd_len_reg = EDC_REG_T5(EDC_H_BIST_CMD_LEN_A, idx);
209 	edc_bist_cmd_data_pattern = EDC_REG_T5(EDC_H_BIST_DATA_PATTERN_A, idx);
210 #undef EDC_REG_T5
211 #undef EDC_STRIDE_T5
212 
213 	if (csio_rd_reg32(hw, edc_bist_cmd_reg) & START_BIST_F)
214 		return -EBUSY;
215 	csio_wr_reg32(hw, addr & ~0x3fU, edc_bist_cmd_addr_reg);
216 	csio_wr_reg32(hw, 64, edc_bist_cmd_len_reg);
217 	csio_wr_reg32(hw, 0xc, edc_bist_cmd_data_pattern);
218 	csio_wr_reg32(hw, BIST_OPCODE_V(1) | START_BIST_F |  BIST_CMD_GAP_V(1),
219 		      edc_bist_cmd_reg);
220 	i = csio_hw_wait_op_done_val(hw, edc_bist_cmd_reg, START_BIST_F,
221 				     0, 10, 1, NULL);
222 	if (i)
223 		return i;
224 
225 #define EDC_DATA(i) (EDC_BIST_STATUS_REG(EDC_BIST_STATUS_RDATA_A, i) + idx)
226 
227 	for (i = 15; i >= 0; i--)
228 		*data++ = htonl(csio_rd_reg32(hw, EDC_DATA(i)));
229 	if (ecc)
230 		*ecc = csio_rd_reg64(hw, EDC_DATA(16));
231 #undef EDC_DATA
232 	return 0;
233 }
234 
235 /*
236  * csio_t5_memory_rw - read/write EDC 0, EDC 1 or MC via PCIE memory window
237  * @hw: the csio_hw
238  * @win: PCI-E memory Window to use
239  * @mtype: memory type: MEM_EDC0, MEM_EDC1, MEM_MC0 (or MEM_MC) or MEM_MC1
240  * @addr: address within indicated memory type
241  * @len: amount of memory to transfer
242  * @buf: host memory buffer
243  * @dir: direction of transfer 1 => read, 0 => write
244  *
245  * Reads/writes an [almost] arbitrary memory region in the firmware: the
246  * firmware memory address, length and host buffer must be aligned on
247  * 32-bit boudaries.  The memory is transferred as a raw byte sequence
248  * from/to the firmware's memory.  If this memory contains data
249  * structures which contain multi-byte integers, it's the callers
250  * responsibility to perform appropriate byte order conversions.
251  */
252 static int
253 csio_t5_memory_rw(struct csio_hw *hw, u32 win, int mtype, u32 addr,
254 		u32 len, uint32_t *buf, int dir)
255 {
256 	u32 pos, start, offset, memoffset;
257 	u32 edc_size, mc_size, win_pf, mem_reg, mem_aperture, mem_base;
258 
259 	/*
260 	 * Argument sanity checks ...
261 	 */
262 	if ((addr & 0x3) || (len & 0x3))
263 		return -EINVAL;
264 
265 	/* Offset into the region of memory which is being accessed
266 	 * MEM_EDC0 = 0
267 	 * MEM_EDC1 = 1
268 	 * MEM_MC   = 2 -- T4
269 	 * MEM_MC0  = 2 -- For T5
270 	 * MEM_MC1  = 3 -- For T5
271 	 */
272 	edc_size  = EDRAM0_SIZE_G(csio_rd_reg32(hw, MA_EDRAM0_BAR_A));
273 	if (mtype != MEM_MC1)
274 		memoffset = (mtype * (edc_size * 1024 * 1024));
275 	else {
276 		mc_size = EXT_MEM_SIZE_G(csio_rd_reg32(hw,
277 						       MA_EXT_MEMORY_BAR_A));
278 		memoffset = (MEM_MC0 * edc_size + mc_size) * 1024 * 1024;
279 	}
280 
281 	/* Determine the PCIE_MEM_ACCESS_OFFSET */
282 	addr = addr + memoffset;
283 
284 	/*
285 	 * Each PCI-E Memory Window is programmed with a window size -- or
286 	 * "aperture" -- which controls the granularity of its mapping onto
287 	 * adapter memory.  We need to grab that aperture in order to know
288 	 * how to use the specified window.  The window is also programmed
289 	 * with the base address of the Memory Window in BAR0's address
290 	 * space.  For T4 this is an absolute PCI-E Bus Address.  For T5
291 	 * the address is relative to BAR0.
292 	 */
293 	mem_reg = csio_rd_reg32(hw,
294 			PCIE_MEM_ACCESS_REG(PCIE_MEM_ACCESS_BASE_WIN_A, win));
295 	mem_aperture = 1 << (WINDOW_V(mem_reg) + 10);
296 	mem_base = PCIEOFST_G(mem_reg) << 10;
297 
298 	start = addr & ~(mem_aperture-1);
299 	offset = addr - start;
300 	win_pf = PFNUM_V(hw->pfn);
301 
302 	csio_dbg(hw, "csio_t5_memory_rw: mem_reg: 0x%x, mem_aperture: 0x%x\n",
303 		 mem_reg, mem_aperture);
304 	csio_dbg(hw, "csio_t5_memory_rw: mem_base: 0x%x, mem_offset: 0x%x\n",
305 		 mem_base, memoffset);
306 	csio_dbg(hw, "csio_t5_memory_rw: start:0x%x, offset:0x%x, win_pf:%d\n",
307 		 start, offset, win_pf);
308 	csio_dbg(hw, "csio_t5_memory_rw: mtype: %d, addr: 0x%x, len: %d\n",
309 		 mtype, addr, len);
310 
311 	for (pos = start; len > 0; pos += mem_aperture, offset = 0) {
312 		/*
313 		 * Move PCI-E Memory Window to our current transfer
314 		 * position.  Read it back to ensure that changes propagate
315 		 * before we attempt to use the new value.
316 		 */
317 		csio_wr_reg32(hw, pos | win_pf,
318 			PCIE_MEM_ACCESS_REG(PCIE_MEM_ACCESS_OFFSET_A, win));
319 		csio_rd_reg32(hw,
320 			PCIE_MEM_ACCESS_REG(PCIE_MEM_ACCESS_OFFSET_A, win));
321 
322 		while (offset < mem_aperture && len > 0) {
323 			if (dir)
324 				*buf++ = csio_rd_reg32(hw, mem_base + offset);
325 			else
326 				csio_wr_reg32(hw, *buf++, mem_base + offset);
327 
328 			offset += sizeof(__be32);
329 			len -= sizeof(__be32);
330 		}
331 	}
332 	return 0;
333 }
334 
335 /*
336  * csio_t5_dfs_create_ext_mem - setup debugfs for MC0 or MC1 to read the values
337  * @hw: the csio_hw
338  *
339  * This function creates files in the debugfs with external memory region
340  * MC0 & MC1.
341  */
342 static void
343 csio_t5_dfs_create_ext_mem(struct csio_hw *hw)
344 {
345 	u32 size;
346 	int i = csio_rd_reg32(hw, MA_TARGET_MEM_ENABLE_A);
347 
348 	if (i & EXT_MEM_ENABLE_F) {
349 		size = csio_rd_reg32(hw, MA_EXT_MEMORY_BAR_A);
350 		csio_add_debugfs_mem(hw, "mc0", MEM_MC0,
351 				     EXT_MEM_SIZE_G(size));
352 	}
353 	if (i & EXT_MEM1_ENABLE_F) {
354 		size = csio_rd_reg32(hw, MA_EXT_MEMORY1_BAR_A);
355 		csio_add_debugfs_mem(hw, "mc1", MEM_MC1,
356 				     EXT_MEM_SIZE_G(size));
357 	}
358 }
359 
360 /* T5 adapter specific function */
361 struct csio_hw_chip_ops t5_ops = {
362 	.chip_set_mem_win		= csio_t5_set_mem_win,
363 	.chip_pcie_intr_handler		= csio_t5_pcie_intr_handler,
364 	.chip_flash_cfg_addr		= csio_t5_flash_cfg_addr,
365 	.chip_mc_read			= csio_t5_mc_read,
366 	.chip_edc_read			= csio_t5_edc_read,
367 	.chip_memory_rw			= csio_t5_memory_rw,
368 	.chip_dfs_create_ext_mem	= csio_t5_dfs_create_ext_mem,
369 };
370