diff options
Diffstat (limited to 'drivers/net/ethernet/chelsio/cxgb4/t4_hw.c')
| -rw-r--r-- | drivers/net/ethernet/chelsio/cxgb4/t4_hw.c | 348 |
1 files changed, 197 insertions, 151 deletions
diff --git a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c index 931478e7bd2..eb5a278e804 100644 --- a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c +++ b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c @@ -1,7 +1,7 @@ /* * This file is part of the Chelsio T4 Ethernet driver for Linux. * - * Copyright (c) 2003-2010 Chelsio Communications, Inc. All rights reserved. + * Copyright (c) 2003-2014 Chelsio Communications, Inc. All rights reserved. * * This software is available to you under a choice of one of two * licenses. You may choose to be licensed under the terms of the GNU @@ -144,6 +144,30 @@ void t4_write_indirect(struct adapter *adap, unsigned int addr_reg, } /* + * Read a 32-bit PCI Configuration Space register via the PCI-E backdoor + * mechanism. This guarantees that we get the real value even if we're + * operating within a Virtual Machine and the Hypervisor is trapping our + * Configuration Space accesses. + */ +void t4_hw_pci_read_cfg4(struct adapter *adap, int reg, u32 *val) +{ + u32 req = ENABLE | FUNCTION(adap->fn) | reg; + + if (is_t4(adap->params.chip)) + req |= F_LOCALCFG; + + t4_write_reg(adap, PCIE_CFG_SPACE_REQ, req); + *val = t4_read_reg(adap, PCIE_CFG_SPACE_DATA); + + /* Reset ENABLE to 0 so reads of PCIE_CFG_SPACE_DATA won't cause a + * Configuration Space read. (None of the other fields matter when + * ENABLE is 0 so a simple register write is easier than a + * read-modify-write via t4_set_reg_field().) + */ + t4_write_reg(adap, PCIE_CFG_SPACE_REQ, 0); +} + +/* * Get the reply to a mailbox command and store it in @rpl in big-endian order. */ static void get_mbox_rpl(struct adapter *adap, __be64 *rpl, int nflit, @@ -389,78 +413,41 @@ int t4_edc_read(struct adapter *adap, int idx, u32 addr, __be32 *data, u64 *ecc) return 0; } -/* - * t4_mem_win_rw - read/write memory through PCIE memory window - * @adap: the adapter - * @addr: address of first byte requested - * @data: MEMWIN0_APERTURE bytes of data containing the requested address - * @dir: direction of transfer 1 => read, 0 => write - * - * Read/write MEMWIN0_APERTURE bytes of data from MC starting at a - * MEMWIN0_APERTURE-byte-aligned address that covers the requested - * address @addr. - */ -static int t4_mem_win_rw(struct adapter *adap, u32 addr, __be32 *data, int dir) -{ - int i; - u32 win_pf = is_t4(adap->params.chip) ? 0 : V_PFNUM(adap->fn); - - /* - * Setup offset into PCIE memory window. Address must be a - * MEMWIN0_APERTURE-byte-aligned address. (Read back MA register to - * ensure that changes propagate before we attempt to use the new - * values.) - */ - t4_write_reg(adap, PCIE_MEM_ACCESS_OFFSET, - (addr & ~(MEMWIN0_APERTURE - 1)) | win_pf); - t4_read_reg(adap, PCIE_MEM_ACCESS_OFFSET); - - /* Collecting data 4 bytes at a time upto MEMWIN0_APERTURE */ - for (i = 0; i < MEMWIN0_APERTURE; i = i+0x4) { - if (dir) - *data++ = (__force __be32) t4_read_reg(adap, - (MEMWIN0_BASE + i)); - else - t4_write_reg(adap, (MEMWIN0_BASE + i), - (__force u32) *data++); - } - - return 0; -} - /** * t4_memory_rw - read/write EDC 0, EDC 1 or MC via PCIE memory window * @adap: the adapter + * @win: PCI-E Memory Window to use * @mtype: memory type: MEM_EDC0, MEM_EDC1 or MEM_MC * @addr: address within indicated memory type * @len: amount of memory to transfer * @buf: host memory buffer - * @dir: direction of transfer 1 => read, 0 => write + * @dir: direction of transfer T4_MEMORY_READ (1) or T4_MEMORY_WRITE (0) * * Reads/writes an [almost] arbitrary memory region in the firmware: the - * firmware memory address, length and host buffer must be aligned on - * 32-bit boudaries. The memory is transferred as a raw byte sequence - * from/to the firmware's memory. If this memory contains data - * structures which contain multi-byte integers, it's the callers - * responsibility to perform appropriate byte order conversions. + * firmware memory address and host buffer must be aligned on 32-bit + * boudaries; the length may be arbitrary. The memory is transferred as + * a raw byte sequence from/to the firmware's memory. If this memory + * contains data structures which contain multi-byte integers, it's the + * caller's responsibility to perform appropriate byte order conversions. */ -static int t4_memory_rw(struct adapter *adap, int mtype, u32 addr, u32 len, - __be32 *buf, int dir) +int t4_memory_rw(struct adapter *adap, int win, int mtype, u32 addr, + u32 len, __be32 *buf, int dir) { - u32 pos, start, end, offset, memoffset; - u32 edc_size, mc_size; - int ret = 0; - __be32 *data; + u32 pos, offset, resid, memoffset; + u32 edc_size, mc_size, win_pf, mem_reg, mem_aperture, mem_base; - /* - * Argument sanity checks ... + /* Argument sanity checks ... */ - if ((addr & 0x3) || (len & 0x3)) + if (addr & 0x3) return -EINVAL; - data = vmalloc(MEMWIN0_APERTURE); - if (!data) - return -ENOMEM; + /* It's convenient to be able to handle lengths which aren't a + * multiple of 32-bits because we often end up transferring files to + * the firmware. So we'll handle that by normalizing the length here + * and then handling any residual transfer at the end. + */ + resid = len & 0x3; + len -= resid; /* Offset into the region of memory which is being accessed * MEM_EDC0 = 0 @@ -481,66 +468,98 @@ static int t4_memory_rw(struct adapter *adap, int mtype, u32 addr, u32 len, /* Determine the PCIE_MEM_ACCESS_OFFSET */ addr = addr + memoffset; - /* - * The underlaying EDC/MC read routines read MEMWIN0_APERTURE bytes - * at a time so we need to round down the start and round up the end. - * We'll start copying out of the first line at (addr - start) a word - * at a time. + /* Each PCI-E Memory Window is programmed with a window size -- or + * "aperture" -- which controls the granularity of its mapping onto + * adapter memory. We need to grab that aperture in order to know + * how to use the specified window. The window is also programmed + * with the base address of the Memory Window in BAR0's address + * space. For T4 this is an absolute PCI-E Bus Address. For T5 + * the address is relative to BAR0. */ - start = addr & ~(MEMWIN0_APERTURE-1); - end = (addr + len + MEMWIN0_APERTURE-1) & ~(MEMWIN0_APERTURE-1); - offset = (addr - start)/sizeof(__be32); + mem_reg = t4_read_reg(adap, + PCIE_MEM_ACCESS_REG(PCIE_MEM_ACCESS_BASE_WIN, + win)); + mem_aperture = 1 << (GET_WINDOW(mem_reg) + 10); + mem_base = GET_PCIEOFST(mem_reg) << 10; + if (is_t4(adap->params.chip)) + mem_base -= adap->t4_bar0; + win_pf = is_t4(adap->params.chip) ? 0 : V_PFNUM(adap->fn); - for (pos = start; pos < end; pos += MEMWIN0_APERTURE, offset = 0) { + /* Calculate our initial PCI-E Memory Window Position and Offset into + * that Window. + */ + pos = addr & ~(mem_aperture-1); + offset = addr - pos; - /* - * If we're writing, copy the data from the caller's memory - * buffer + /* Set up initial PCI-E Memory Window to cover the start of our + * transfer. (Read it back to ensure that changes propagate before we + * attempt to use the new value.) + */ + t4_write_reg(adap, + PCIE_MEM_ACCESS_REG(PCIE_MEM_ACCESS_OFFSET, win), + pos | win_pf); + t4_read_reg(adap, + PCIE_MEM_ACCESS_REG(PCIE_MEM_ACCESS_OFFSET, win)); + + /* Transfer data to/from the adapter as long as there's an integral + * number of 32-bit transfers to complete. + */ + while (len > 0) { + if (dir == T4_MEMORY_READ) + *buf++ = (__force __be32) t4_read_reg(adap, + mem_base + offset); + else + t4_write_reg(adap, mem_base + offset, + (__force u32) *buf++); + offset += sizeof(__be32); + len -= sizeof(__be32); + + /* If we've reached the end of our current window aperture, + * move the PCI-E Memory Window on to the next. Note that + * doing this here after "len" may be 0 allows us to set up + * the PCI-E Memory Window for a possible final residual + * transfer below ... */ - if (!dir) { - /* - * If we're doing a partial write, then we need to do - * a read-modify-write ... - */ - if (offset || len < MEMWIN0_APERTURE) { - ret = t4_mem_win_rw(adap, pos, data, 1); - if (ret) - break; - } - while (offset < (MEMWIN0_APERTURE/sizeof(__be32)) && - len > 0) { - data[offset++] = *buf++; - len -= sizeof(__be32); - } + if (offset == mem_aperture) { + pos += mem_aperture; + offset = 0; + t4_write_reg(adap, + PCIE_MEM_ACCESS_REG(PCIE_MEM_ACCESS_OFFSET, + win), pos | win_pf); + t4_read_reg(adap, + PCIE_MEM_ACCESS_REG(PCIE_MEM_ACCESS_OFFSET, + win)); } - - /* - * Transfer a block of memory and bail if there's an error. - */ - ret = t4_mem_win_rw(adap, pos, data, dir); - if (ret) - break; - - /* - * If we're reading, copy the data into the caller's memory - * buffer. - */ - if (dir) - while (offset < (MEMWIN0_APERTURE/sizeof(__be32)) && - len > 0) { - *buf++ = data[offset++]; - len -= sizeof(__be32); - } } - vfree(data); - return ret; -} + /* If the original transfer had a length which wasn't a multiple of + * 32-bits, now's where we need to finish off the transfer of the + * residual amount. The PCI-E Memory Window has already been moved + * above (if necessary) to cover this final transfer. + */ + if (resid) { + union { + __be32 word; + char byte[4]; + } last; + unsigned char *bp; + int i; + + if (dir == T4_MEMORY_WRITE) { + last.word = (__force __be32) t4_read_reg(adap, + mem_base + offset); + for (bp = (unsigned char *)buf, i = resid; i < 4; i++) + bp[i] = last.byte[i]; + } else { + last.word = *buf; + for (i = resid; i < 4; i++) + last.byte[i] = 0; + t4_write_reg(adap, mem_base + offset, + (__force u32) last.word); + } + } -int t4_memory_write(struct adapter *adap, int mtype, u32 addr, u32 len, - __be32 *buf) -{ - return t4_memory_rw(adap, mtype, addr, len, buf, 0); + return 0; } #define EEPROM_STAT_ADDR 0x7bfc @@ -2505,39 +2524,6 @@ int t4_fwaddrspace_write(struct adapter *adap, unsigned int mbox, } /** - * t4_mem_win_read_len - read memory through PCIE memory window - * @adap: the adapter - * @addr: address of first byte requested aligned on 32b. - * @data: len bytes to hold the data read - * @len: amount of data to read from window. Must be <= - * MEMWIN0_APERATURE after adjusting for 16B for T4 and - * 128B for T5 alignment requirements of the the memory window. - * - * Read len bytes of data from MC starting at @addr. - */ -int t4_mem_win_read_len(struct adapter *adap, u32 addr, __be32 *data, int len) -{ - int i, off; - u32 win_pf = is_t4(adap->params.chip) ? 0 : V_PFNUM(adap->fn); - - /* Align on a 2KB boundary. - */ - off = addr & MEMWIN0_APERTURE; - if ((addr & 3) || (len + off) > MEMWIN0_APERTURE) - return -EINVAL; - - t4_write_reg(adap, PCIE_MEM_ACCESS_OFFSET, - (addr & ~MEMWIN0_APERTURE) | win_pf); - t4_read_reg(adap, PCIE_MEM_ACCESS_OFFSET); - - for (i = 0; i < len; i += 4) - *data++ = (__force __be32) t4_read_reg(adap, - (MEMWIN0_BASE + off + i)); - - return 0; -} - -/** * t4_mdio_rd - read a PHY register through MDIO * @adap: the adapter * @mbox: mailbox to use for the FW command @@ -3175,6 +3161,46 @@ int t4_query_params(struct adapter *adap, unsigned int mbox, unsigned int pf, } /** + * t4_set_params_nosleep - sets FW or device parameters + * @adap: the adapter + * @mbox: mailbox to use for the FW command + * @pf: the PF + * @vf: the VF + * @nparams: the number of parameters + * @params: the parameter names + * @val: the parameter values + * + * Does not ever sleep + * Sets the value of FW or device parameters. Up to 7 parameters can be + * specified at once. + */ +int t4_set_params_nosleep(struct adapter *adap, unsigned int mbox, + unsigned int pf, unsigned int vf, + unsigned int nparams, const u32 *params, + const u32 *val) +{ + struct fw_params_cmd c; + __be32 *p = &c.param[0].mnem; + + if (nparams > 7) + return -EINVAL; + + memset(&c, 0, sizeof(c)); + c.op_to_vfn = cpu_to_be32(FW_CMD_OP(FW_PARAMS_CMD) | + FW_CMD_REQUEST | FW_CMD_WRITE | + FW_PARAMS_CMD_PFN(pf) | + FW_PARAMS_CMD_VFN(vf)); + c.retval_len16 = cpu_to_be32(FW_LEN16(c)); + + while (nparams--) { + *p++ = cpu_to_be32(*params++); + *p++ = cpu_to_be32(*val++); + } + + return t4_wr_mbox_ns(adap, mbox, &c, sizeof(c), NULL); +} + +/** * t4_set_params - sets FW or device parameters * @adap: the adapter * @mbox: mailbox to use for the FW command @@ -3499,6 +3525,33 @@ int t4_set_addr_hash(struct adapter *adap, unsigned int mbox, unsigned int viid, } /** + * t4_enable_vi_params - enable/disable a virtual interface + * @adap: the adapter + * @mbox: mailbox to use for the FW command + * @viid: the VI id + * @rx_en: 1=enable Rx, 0=disable Rx + * @tx_en: 1=enable Tx, 0=disable Tx + * @dcb_en: 1=enable delivery of Data Center Bridging messages. + * + * Enables/disables a virtual interface. Note that setting DCB Enable + * only makes sense when enabling a Virtual Interface ... + */ +int t4_enable_vi_params(struct adapter *adap, unsigned int mbox, + unsigned int viid, bool rx_en, bool tx_en, bool dcb_en) +{ + struct fw_vi_enable_cmd c; + + memset(&c, 0, sizeof(c)); + c.op_to_viid = htonl(FW_CMD_OP(FW_VI_ENABLE_CMD) | FW_CMD_REQUEST | + FW_CMD_EXEC | FW_VI_ENABLE_CMD_VIID(viid)); + + c.ien_to_len16 = htonl(FW_VI_ENABLE_CMD_IEN(rx_en) | + FW_VI_ENABLE_CMD_EEN(tx_en) | FW_LEN16(c) | + FW_VI_ENABLE_CMD_DCB_INFO(dcb_en)); + return t4_wr_mbox(adap, mbox, &c, sizeof(c), NULL); +} + +/** * t4_enable_vi - enable/disable a virtual interface * @adap: the adapter * @mbox: mailbox to use for the FW command @@ -3511,14 +3564,7 @@ int t4_set_addr_hash(struct adapter *adap, unsigned int mbox, unsigned int viid, int t4_enable_vi(struct adapter *adap, unsigned int mbox, unsigned int viid, bool rx_en, bool tx_en) { - struct fw_vi_enable_cmd c; - - memset(&c, 0, sizeof(c)); - c.op_to_viid = htonl(FW_CMD_OP(FW_VI_ENABLE_CMD) | FW_CMD_REQUEST | - FW_CMD_EXEC | FW_VI_ENABLE_CMD_VIID(viid)); - c.ien_to_len16 = htonl(FW_VI_ENABLE_CMD_IEN(rx_en) | - FW_VI_ENABLE_CMD_EEN(tx_en) | FW_LEN16(c)); - return t4_wr_mbox(adap, mbox, &c, sizeof(c), NULL); + return t4_enable_vi_params(adap, mbox, viid, rx_en, tx_en, 0); } /** |