drivers/scsi/csiostor/csio_hw_t5.c

   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(0) |
  60                           WINDOW(ilog2(MEMWIN_APERTURE) - 10),
  61                           PCIE_MEM_ACCESS_REG(PCIE_MEM_ACCESS_BASE_WIN, win));
  62         csio_rd_reg32(hw,
  63                       PCIE_MEM_ACCESS_REG(PCIE_MEM_ACCESS_BASE_WIN, 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 sysbus_intr_info[] = {
  75                 { RNPP, "RXNP array parity error", -1, 1 },
  76                 { RPCP, "RXPC array parity error", -1, 1 },
  77                 { RCIP, "RXCIF array parity error", -1, 1 },
  78                 { RCCP, "Rx completions control array parity error", -1, 1 },
  79                 { RFTP, "RXFT array parity error", -1, 1 },
  80                 { 0, NULL, 0, 0 }
  81         };
  82         static struct intr_info pcie_port_intr_info[] = {
  83                 { TPCP, "TXPC array parity error", -1, 1 },
  84                 { TNPP, "TXNP array parity error", -1, 1 },
  85                 { TFTP, "TXFT array parity error", -1, 1 },
  86                 { TCAP, "TXCA array parity error", -1, 1 },
  87                 { TCIP, "TXCIF array parity error", -1, 1 },
  88                 { RCAP, "RXCA array parity error", -1, 1 },
  89                 { OTDD, "outbound request TLP discarded", -1, 1 },
  90                 { RDPE, "Rx data parity error", -1, 1 },
  91                 { TDUE, "Tx uncorrectable data error", -1, 1 },
  92                 { 0, NULL, 0, 0 }
  93         };
  94
  95         static struct intr_info pcie_intr_info[] = {
  96                 { MSTGRPPERR, "Master Response Read Queue parity error",
  97                 -1, 1 },
  98                 { MSTTIMEOUTPERR, "Master Timeout FIFO parity error", -1, 1 },
  99                 { MSIXSTIPERR, "MSI-X STI SRAM parity error", -1, 1 },
 100                 { MSIXADDRLPERR, "MSI-X AddrL parity error", -1, 1 },
 101                 { MSIXADDRHPERR, "MSI-X AddrH parity error", -1, 1 },
 102                 { MSIXDATAPERR, "MSI-X data parity error", -1, 1 },
 103                 { MSIXDIPERR, "MSI-X DI parity error", -1, 1 },
 104                 { PIOCPLGRPPERR, "PCI PIO completion Group FIFO parity error",
 105                 -1, 1 },
 106                 { PIOREQGRPPERR, "PCI PIO request Group FIFO parity error",
 107                 -1, 1 },
 108                 { TARTAGPERR, "PCI PCI target tag FIFO parity error", -1, 1 },
 109                 { MSTTAGQPERR, "PCI master tag queue parity error", -1, 1 },
 110                 { CREQPERR, "PCI CMD channel request parity error", -1, 1 },
 111                 { CRSPPERR, "PCI CMD channel response parity error", -1, 1 },
 112                 { DREQWRPERR, "PCI DMA channel write request parity error",
 113                 -1, 1 },
 114                 { DREQPERR, "PCI DMA channel request parity error", -1, 1 },
 115                 { DRSPPERR, "PCI DMA channel response parity error", -1, 1 },
 116                 { HREQWRPERR, "PCI HMA channel count parity error", -1, 1 },
 117                 { HREQPERR, "PCI HMA channel request parity error", -1, 1 },
 118                 { HRSPPERR, "PCI HMA channel response parity error", -1, 1 },
 119                 { CFGSNPPERR, "PCI config snoop FIFO parity error", -1, 1 },
 120                 { FIDPERR, "PCI FID parity error", -1, 1 },
 121                 { VFIDPERR, "PCI INTx clear parity error", -1, 1 },
 122                 { MAGRPPERR, "PCI MA group FIFO parity error", -1, 1 },
 123                 { PIOTAGPERR, "PCI PIO tag parity error", -1, 1 },
 124                 { IPRXHDRGRPPERR, "PCI IP Rx header group parity error",
 125                 -1, 1 },
 126                 { IPRXDATAGRPPERR, "PCI IP Rx data group parity error",
 127                 -1, 1 },
 128                 { RPLPERR, "PCI IP replay buffer parity error", -1, 1 },
 129                 { IPSOTPERR, "PCI IP SOT buffer parity error", -1, 1 },
 130                 { TRGT1GRPPERR, "PCI TRGT1 group FIFOs parity error", -1, 1 },
 131                 { READRSPERR, "Outbound read error", -1, 0 },
 132                 { 0, NULL, 0, 0 }
 133         };
 134
 135         int fat;
 136         fat = csio_handle_intr_status(hw,
 137                                       PCIE_CORE_UTL_SYSTEM_BUS_AGENT_STATUS,
 138                                       sysbus_intr_info) +
 139               csio_handle_intr_status(hw,
 140                                       PCIE_CORE_UTL_PCI_EXPRESS_PORT_STATUS,
 141                                       pcie_port_intr_info) +
 142               csio_handle_intr_status(hw, PCIE_INT_CAUSE, pcie_intr_info);
 143         if (fat)
 144                 csio_hw_fatal_err(hw);
 145 }
 146
 147 /*
 148  * csio_t5_flash_cfg_addr - return the address of the flash configuration file
 149  * @hw: the HW module
 150  *
 151  * Return the address within the flash where the Firmware Configuration
 152  * File is stored.
 153  */
 154 static unsigned int
 155 csio_t5_flash_cfg_addr(struct csio_hw *hw)
 156 {
 157         return FLASH_CFG_START;
 158 }
 159
 160 /*
 161  *      csio_t5_mc_read - read from MC through backdoor accesses
 162  *      @hw: the hw module
 163  *      @idx: index to the register
 164  *      @addr: address of first byte requested
 165  *      @data: 64 bytes of data containing the requested address
 166  *      @ecc: where to store the corresponding 64-bit ECC word
 167  *
 168  *      Read 64 bytes of data from MC starting at a 64-byte-aligned address
 169  *      that covers the requested address @addr.  If @parity is not %NULL it
 170  *      is assigned the 64-bit ECC word for the read data.
 171  */
 172 static int
 173 csio_t5_mc_read(struct csio_hw *hw, int idx, uint32_t addr, __be32 *data,
 174                 uint64_t *ecc)
 175 {
 176         int i;
 177         uint32_t mc_bist_cmd_reg, mc_bist_cmd_addr_reg, mc_bist_cmd_len_reg;
 178         uint32_t mc_bist_status_rdata_reg, mc_bist_data_pattern_reg;
 179
 180         mc_bist_cmd_reg = MC_REG(MC_P_BIST_CMD, idx);
 181         mc_bist_cmd_addr_reg = MC_REG(MC_P_BIST_CMD_ADDR, idx);
 182         mc_bist_cmd_len_reg = MC_REG(MC_P_BIST_CMD_LEN, idx);
 183         mc_bist_status_rdata_reg = MC_REG(MC_P_BIST_STATUS_RDATA, idx);
 184         mc_bist_data_pattern_reg = MC_REG(MC_P_BIST_DATA_PATTERN, idx);
 185
 186         if (csio_rd_reg32(hw, mc_bist_cmd_reg) & START_BIST)
 187                 return -EBUSY;
 188         csio_wr_reg32(hw, addr & ~0x3fU, mc_bist_cmd_addr_reg);
 189         csio_wr_reg32(hw, 64, mc_bist_cmd_len_reg);
 190         csio_wr_reg32(hw, 0xc, mc_bist_data_pattern_reg);
 191         csio_wr_reg32(hw, BIST_OPCODE(1) | START_BIST |  BIST_CMD_GAP(1),
 192                       mc_bist_cmd_reg);
 193         i = csio_hw_wait_op_done_val(hw, mc_bist_cmd_reg, START_BIST,
 194                                      0, 10, 1, NULL);
 195         if (i)
 196                 return i;
 197
 198 #define MC_DATA(i) MC_BIST_STATUS_REG(MC_BIST_STATUS_RDATA, i)
 199
 200         for (i = 15; i >= 0; i--)
 201                 *data++ = htonl(csio_rd_reg32(hw, MC_DATA(i)));
 202         if (ecc)
 203                 *ecc = csio_rd_reg64(hw, MC_DATA(16));
 204 #undef MC_DATA
 205         return 0;
 206 }
 207
 208 /*
 209  *      csio_t5_edc_read - read from EDC through backdoor accesses
 210  *      @hw: the hw module
 211  *      @idx: which EDC to access
 212  *      @addr: address of first byte requested
 213  *      @data: 64 bytes of data containing the requested address
 214  *      @ecc: where to store the corresponding 64-bit ECC word
 215  *
 216  *      Read 64 bytes of data from EDC starting at a 64-byte-aligned address
 217  *      that covers the requested address @addr.  If @parity is not %NULL it
 218  *      is assigned the 64-bit ECC word for the read data.
 219  */
 220 static int
 221 csio_t5_edc_read(struct csio_hw *hw, int idx, uint32_t addr, __be32 *data,
 222                 uint64_t *ecc)
 223 {
 224         int i;
 225         uint32_t edc_bist_cmd_reg, edc_bist_cmd_addr_reg, edc_bist_cmd_len_reg;
 226         uint32_t edc_bist_cmd_data_pattern, edc_bist_status_rdata_reg;
 227
 228 /*
 229  * These macro are missing in t4_regs.h file.
 230  */
 231 #define EDC_STRIDE_T5 (EDC_T51_BASE_ADDR - EDC_T50_BASE_ADDR)
 232 #define EDC_REG_T5(reg, idx) (reg + EDC_STRIDE_T5 * idx)
 233
 234         edc_bist_cmd_reg = EDC_REG_T5(EDC_H_BIST_CMD, idx);
 235         edc_bist_cmd_addr_reg = EDC_REG_T5(EDC_H_BIST_CMD_ADDR, idx);
 236         edc_bist_cmd_len_reg = EDC_REG_T5(EDC_H_BIST_CMD_LEN, idx);
 237         edc_bist_cmd_data_pattern = EDC_REG_T5(EDC_H_BIST_DATA_PATTERN, idx);
 238         edc_bist_status_rdata_reg = EDC_REG_T5(EDC_H_BIST_STATUS_RDATA, idx);
 239 #undef EDC_REG_T5
 240 #undef EDC_STRIDE_T5
 241
 242         if (csio_rd_reg32(hw, edc_bist_cmd_reg) & START_BIST)
 243                 return -EBUSY;
 244         csio_wr_reg32(hw, addr & ~0x3fU, edc_bist_cmd_addr_reg);
 245         csio_wr_reg32(hw, 64, edc_bist_cmd_len_reg);
 246         csio_wr_reg32(hw, 0xc, edc_bist_cmd_data_pattern);
 247         csio_wr_reg32(hw, BIST_OPCODE(1) | START_BIST |  BIST_CMD_GAP(1),
 248                       edc_bist_cmd_reg);
 249         i = csio_hw_wait_op_done_val(hw, edc_bist_cmd_reg, START_BIST,
 250                                      0, 10, 1, NULL);
 251         if (i)
 252                 return i;
 253
 254 #define EDC_DATA(i) (EDC_BIST_STATUS_REG(EDC_BIST_STATUS_RDATA, i) + idx)
 255
 256         for (i = 15; i >= 0; i--)
 257                 *data++ = htonl(csio_rd_reg32(hw, EDC_DATA(i)));
 258         if (ecc)
 259                 *ecc = csio_rd_reg64(hw, EDC_DATA(16));
 260 #undef EDC_DATA
 261         return 0;
 262 }
 263
 264 /*
 265  * csio_t5_memory_rw - read/write EDC 0, EDC 1 or MC via PCIE memory window
 266  * @hw: the csio_hw
 267  * @win: PCI-E memory Window to use
 268  * @mtype: memory type: MEM_EDC0, MEM_EDC1, MEM_MC0 (or MEM_MC) or MEM_MC1
 269  * @addr: address within indicated memory type
 270  * @len: amount of memory to transfer
 271  * @buf: host memory buffer
 272  * @dir: direction of transfer 1 => read, 0 => write
 273  *
 274  * Reads/writes an [almost] arbitrary memory region in the firmware: the
 275  * firmware memory address, length and host buffer must be aligned on
 276  * 32-bit boudaries.  The memory is transferred as a raw byte sequence
 277  * from/to the firmware's memory.  If this memory contains data
 278  * structures which contain multi-byte integers, it's the callers
 279  * responsibility to perform appropriate byte order conversions.
 280  */
 281 static int
 282 csio_t5_memory_rw(struct csio_hw *hw, u32 win, int mtype, u32 addr,
 283                 u32 len, uint32_t *buf, int dir)
 284 {
 285         u32 pos, start, offset, memoffset;
 286         u32 edc_size, mc_size, win_pf, mem_reg, mem_aperture, mem_base;
 287
 288         /*
 289          * Argument sanity checks ...
 290          */
 291         if ((addr & 0x3) || (len & 0x3))
 292                 return -EINVAL;
 293
 294         /* Offset into the region of memory which is being accessed
 295          * MEM_EDC0 = 0
 296          * MEM_EDC1 = 1
 297          * MEM_MC   = 2 -- T4
 298          * MEM_MC0  = 2 -- For T5
 299          * MEM_MC1  = 3 -- For T5
 300          */
 301         edc_size  = EDRAM_SIZE_GET(csio_rd_reg32(hw, MA_EDRAM0_BAR));
 302         if (mtype != MEM_MC1)
 303                 memoffset = (mtype * (edc_size * 1024 * 1024));
 304         else {
 305                 mc_size = EXT_MEM_SIZE_GET(csio_rd_reg32(hw,
 306                                                          MA_EXT_MEMORY_BAR));
 307                 memoffset = (MEM_MC0 * edc_size + mc_size) * 1024 * 1024;
 308         }
 309
 310         /* Determine the PCIE_MEM_ACCESS_OFFSET */
 311         addr = addr + memoffset;
 312
 313         /*
 314          * Each PCI-E Memory Window is programmed with a window size -- or
 315          * "aperture" -- which controls the granularity of its mapping onto
 316          * adapter memory.  We need to grab that aperture in order to know
 317          * how to use the specified window.  The window is also programmed
 318          * with the base address of the Memory Window in BAR0's address
 319          * space.  For T4 this is an absolute PCI-E Bus Address.  For T5
 320          * the address is relative to BAR0.
 321          */
 322         mem_reg = csio_rd_reg32(hw,
 323                         PCIE_MEM_ACCESS_REG(PCIE_MEM_ACCESS_BASE_WIN, win));
 324         mem_aperture = 1 << (WINDOW(mem_reg) + 10);
 325         mem_base = GET_PCIEOFST(mem_reg) << 10;
 326
 327         start = addr & ~(mem_aperture-1);
 328         offset = addr - start;
 329         win_pf = V_PFNUM(hw->pfn);
 330
 331         csio_dbg(hw, "csio_t5_memory_rw: mem_reg: 0x%x, mem_aperture: 0x%x\n",
 332                  mem_reg, mem_aperture);
 333         csio_dbg(hw, "csio_t5_memory_rw: mem_base: 0x%x, mem_offset: 0x%x\n",
 334                  mem_base, memoffset);
 335         csio_dbg(hw, "csio_t5_memory_rw: start:0x%x, offset:0x%x, win_pf:%d\n",
 336                  start, offset, win_pf);
 337         csio_dbg(hw, "csio_t5_memory_rw: mtype: %d, addr: 0x%x, len: %d\n",
 338                  mtype, addr, len);
 339
 340         for (pos = start; len > 0; pos += mem_aperture, offset = 0) {
 341                 /*
 342                  * Move PCI-E Memory Window to our current transfer
 343                  * position.  Read it back to ensure that changes propagate
 344                  * before we attempt to use the new value.
 345                  */
 346                 csio_wr_reg32(hw, pos | win_pf,
 347                         PCIE_MEM_ACCESS_REG(PCIE_MEM_ACCESS_OFFSET, win));
 348                 csio_rd_reg32(hw,
 349                         PCIE_MEM_ACCESS_REG(PCIE_MEM_ACCESS_OFFSET, win));
 350
 351                 while (offset < mem_aperture && len > 0) {
 352                         if (dir)
 353                                 *buf++ = csio_rd_reg32(hw, mem_base + offset);
 354                         else
 355                                 csio_wr_reg32(hw, *buf++, mem_base + offset);
 356
 357                         offset += sizeof(__be32);
 358                         len -= sizeof(__be32);
 359                 }
 360         }
 361         return 0;
 362 }
 363
 364 /*
 365  * csio_t5_dfs_create_ext_mem - setup debugfs for MC0 or MC1 to read the values
 366  * @hw: the csio_hw
 367  *
 368  * This function creates files in the debugfs with external memory region
 369  * MC0 & MC1.
 370  */
 371 static void
 372 csio_t5_dfs_create_ext_mem(struct csio_hw *hw)
 373 {
 374         u32 size;
 375         int i = csio_rd_reg32(hw, MA_TARGET_MEM_ENABLE);
 376         if (i & EXT_MEM_ENABLE) {
 377                 size = csio_rd_reg32(hw, MA_EXT_MEMORY_BAR);
 378                 csio_add_debugfs_mem(hw, "mc0", MEM_MC0,
 379                                      EXT_MEM_SIZE_GET(size));
 380         }
 381         if (i & EXT_MEM1_ENABLE) {
 382                 size = csio_rd_reg32(hw, MA_EXT_MEMORY1_BAR);
 383                 csio_add_debugfs_mem(hw, "mc1", MEM_MC1,
 384                                      EXT_MEM_SIZE_GET(size));
 385         }
 386 }
 387
 388 /* T5 adapter specific function */
 389 struct csio_hw_chip_ops t5_ops = {
 390         .chip_set_mem_win               = csio_t5_set_mem_win,
 391         .chip_pcie_intr_handler         = csio_t5_pcie_intr_handler,
 392         .chip_flash_cfg_addr            = csio_t5_flash_cfg_addr,
 393         .chip_mc_read                   = csio_t5_mc_read,
 394         .chip_edc_read                  = csio_t5_edc_read,
 395         .chip_memory_rw                 = csio_t5_memory_rw,
 396         .chip_dfs_create_ext_mem        = csio_t5_dfs_create_ext_mem,
 397 };