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author | 2017-11-08 14:15:11 +0000 | |
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committer | 2017-11-08 14:45:54 +0000 | |
commit | 055c52583a2794da8ba1e85a48cce3832372b12f (patch) | |
tree | 8ceb1cb78fbb46a0f341f8ee24feb3c6b5540013 /drivers/net/nfp/nfp_nspu.c | |
parent | f239aed5e674965691846e8ce3f187dd47523689 (diff) |
New upstream version 17.11-rc3
Change-Id: I6a5baa40612fe0c20f30b5fa773a6cbbac63a685
Signed-off-by: Luca Boccassi <luca.boccassi@gmail.com>
Diffstat (limited to 'drivers/net/nfp/nfp_nspu.c')
-rw-r--r-- | drivers/net/nfp/nfp_nspu.c | 623 |
1 files changed, 623 insertions, 0 deletions
diff --git a/drivers/net/nfp/nfp_nspu.c b/drivers/net/nfp/nfp_nspu.c new file mode 100644 index 00000000..6ba940cb --- /dev/null +++ b/drivers/net/nfp/nfp_nspu.c @@ -0,0 +1,623 @@ +#include <stdlib.h> +#include <stdio.h> +#include <string.h> +#include <unistd.h> +#include <sys/types.h> +#include <sys/file.h> +#include <sys/stat.h> +#include <fcntl.h> + +#include <rte_log.h> +#include <rte_byteorder.h> + +#include "nfp_nfpu.h" + +#define CFG_EXP_BAR_ADDR_SZ 1 +#define CFG_EXP_BAR_MAP_TYPE 1 + +#define EXP_BAR_TARGET_SHIFT 23 +#define EXP_BAR_LENGTH_SHIFT 27 /* 0=32, 1=64 bit increment */ +#define EXP_BAR_MAP_TYPE_SHIFT 29 /* Bulk BAR map */ + +/* NFP target for NSP access */ +#define NFP_NSP_TARGET 7 + +/* Expansion BARs for mapping PF vnic BARs */ +#define NFP_NET_PF_CFG_EXP_BAR 6 +#define NFP_NET_PF_HW_QUEUES_EXP_BAR 5 + +/* + * This is an NFP internal address used for configuring properly an NFP + * expansion BAR. + */ +#define MEM_CMD_BASE_ADDR 0x8100000000 + +/* NSP interface registers */ +#define NSP_BASE (MEM_CMD_BASE_ADDR + 0x22100) +#define NSP_STATUS 0x00 +#define NSP_COMMAND 0x08 +#define NSP_BUFFER 0x10 +#define NSP_DEFAULT_BUF 0x18 +#define NSP_DEFAULT_BUF_CFG 0x20 + +#define NSP_MAGIC 0xab10 +#define NSP_STATUS_MAGIC(x) (((x) >> 48) & 0xffff) +#define NSP_STATUS_MAJOR(x) (int)(((x) >> 44) & 0xf) +#define NSP_STATUS_MINOR(x) (int)(((x) >> 32) & 0xfff) + +/* NSP commands */ +#define NSP_CMD_RESET 1 +#define NSP_CMD_FW_LOAD 6 +#define NSP_CMD_READ_ETH_TABLE 7 +#define NSP_CMD_WRITE_ETH_TABLE 8 +#define NSP_CMD_GET_SYMBOL 14 + +#define NSP_BUFFER_CFG_SIZE_MASK (0xff) + +#define NSP_REG_ADDR(d, off, reg) ((uint8_t *)(d)->mem_base + (off) + (reg)) +#define NSP_REG_VAL(p) (*(uint64_t *)(p)) + +/* + * An NFP expansion BAR is configured for allowing access to a specific NFP + * target: + * + * IN: + * desc: struct with basic NSP addresses to work with + * expbar: NFP PF expansion BAR index to configure + * tgt: NFP target to configure access + * addr: NFP target address + * + * OUT: + * pcie_offset: NFP PCI BAR offset to work with + */ +static void +nfp_nspu_mem_bar_cfg(nspu_desc_t *desc, int expbar, int tgt, + uint64_t addr, uint64_t *pcie_offset) +{ + uint64_t x, y, barsz; + uint32_t *expbar_ptr; + + barsz = desc->barsz; + + /* + * NFP CPP address to configure. This comes from NFP 6000 + * datasheet document based on Bulk mapping. + */ + x = (addr >> (barsz - 3)) << (21 - (40 - (barsz - 3))); + x |= CFG_EXP_BAR_MAP_TYPE << EXP_BAR_MAP_TYPE_SHIFT; + x |= CFG_EXP_BAR_ADDR_SZ << EXP_BAR_LENGTH_SHIFT; + x |= tgt << EXP_BAR_TARGET_SHIFT; + + /* Getting expansion bar configuration register address */ + expbar_ptr = (uint32_t *)desc->cfg_base; + /* Each physical PCI BAR has 8 NFP expansion BARs */ + expbar_ptr += (desc->pcie_bar * 8) + expbar; + + /* Writing to the expansion BAR register */ + *expbar_ptr = (uint32_t)x; + + /* Getting the pcie offset to work with from userspace */ + y = addr & ((uint64_t)(1 << (barsz - 3)) - 1); + *pcie_offset = y; +} + +/* + * Configuring an expansion bar for accessing NSP userspace interface. This + * function configures always the same expansion bar, which implies access to + * previously configured NFP target is lost. + */ +static void +nspu_xlate(nspu_desc_t *desc, uint64_t addr, uint64_t *pcie_offset) +{ + nfp_nspu_mem_bar_cfg(desc, desc->exp_bar, NFP_NSP_TARGET, addr, + pcie_offset); +} + +int +nfp_nsp_get_abi_version(nspu_desc_t *desc, int *major, int *minor) +{ + uint64_t pcie_offset; + uint64_t nsp_reg; + + nspu_xlate(desc, NSP_BASE, &pcie_offset); + nsp_reg = NSP_REG_VAL(NSP_REG_ADDR(desc, pcie_offset, NSP_STATUS)); + + if (NSP_STATUS_MAGIC(nsp_reg) != NSP_MAGIC) + return -1; + + *major = NSP_STATUS_MAJOR(nsp_reg); + *minor = NSP_STATUS_MINOR(nsp_reg); + + return 0; +} + +int +nfp_nspu_init(nspu_desc_t *desc, int nfp, int pcie_bar, size_t pcie_barsz, + int exp_bar, void *exp_bar_cfg_base, void *exp_bar_mmap) +{ + uint64_t offset, buffaddr; + uint64_t nsp_reg; + + desc->nfp = nfp; + desc->pcie_bar = pcie_bar; + desc->exp_bar = exp_bar; + desc->barsz = pcie_barsz; + desc->windowsz = 1 << (desc->barsz - 3); + desc->cfg_base = exp_bar_cfg_base; + desc->mem_base = exp_bar_mmap; + + nspu_xlate(desc, NSP_BASE, &offset); + + /* + * Other NSPU clients can use other buffers. Let's tell NSPU we use the + * default buffer. + */ + buffaddr = NSP_REG_VAL(NSP_REG_ADDR(desc, offset, NSP_DEFAULT_BUF)); + NSP_REG_VAL(NSP_REG_ADDR(desc, offset, NSP_BUFFER)) = buffaddr; + + /* NFP internal addresses are 40 bits. Clean all other bits here */ + buffaddr = buffaddr & (((uint64_t)1 << 40) - 1); + desc->bufaddr = buffaddr; + + /* Lets get information about the buffer */ + nsp_reg = NSP_REG_VAL(NSP_REG_ADDR(desc, offset, NSP_DEFAULT_BUF_CFG)); + + /* Buffer size comes in MBs. Coversion to bytes */ + desc->buf_size = ((size_t)nsp_reg & NSP_BUFFER_CFG_SIZE_MASK) << 20; + + return 0; +} + +#define NSPU_NFP_BUF(addr, base, off) \ + (*(uint64_t *)((uint8_t *)(addr)->mem_base + ((base) | (off)))) + +#define NSPU_HOST_BUF(base, off) (*(uint64_t *)((uint8_t *)(base) + (off))) + +static int +nspu_buff_write(nspu_desc_t *desc, void *buffer, size_t size) +{ + uint64_t pcie_offset, pcie_window_base, pcie_window_offset; + uint64_t windowsz = desc->windowsz; + uint64_t buffaddr, j, i = 0; + int ret = 0; + + if (size > desc->buf_size) + return -1; + + buffaddr = desc->bufaddr; + windowsz = desc->windowsz; + + while (i < size) { + /* Expansion bar reconfiguration per window size */ + nspu_xlate(desc, buffaddr + i, &pcie_offset); + pcie_window_base = pcie_offset & (~(windowsz - 1)); + pcie_window_offset = pcie_offset & (windowsz - 1); + for (j = pcie_window_offset; ((j < windowsz) && (i < size)); + j += 8) { + NSPU_NFP_BUF(desc, pcie_window_base, j) = + NSPU_HOST_BUF(buffer, i); + i += 8; + } + } + + return ret; +} + +static int +nspu_buff_read(nspu_desc_t *desc, void *buffer, size_t size) +{ + uint64_t pcie_offset, pcie_window_base, pcie_window_offset; + uint64_t windowsz, i = 0, j; + uint64_t buffaddr; + int ret = 0; + + if (size > desc->buf_size) + return -1; + + buffaddr = desc->bufaddr; + windowsz = desc->windowsz; + + while (i < size) { + /* Expansion bar reconfiguration per window size */ + nspu_xlate(desc, buffaddr + i, &pcie_offset); + pcie_window_base = pcie_offset & (~(windowsz - 1)); + pcie_window_offset = pcie_offset & (windowsz - 1); + for (j = pcie_window_offset; ((j < windowsz) && (i < size)); + j += 8) { + NSPU_HOST_BUF(buffer, i) = + NSPU_NFP_BUF(desc, pcie_window_base, j); + i += 8; + } + } + + return ret; +} + +static int +nspu_command(nspu_desc_t *desc, uint16_t cmd, int read, int write, + void *buffer, size_t rsize, size_t wsize) +{ + uint64_t status, cmd_reg; + uint64_t offset; + int retry = 0; + int retries = 120; + int ret = 0; + + /* Same expansion BAR is used for different things */ + nspu_xlate(desc, NSP_BASE, &offset); + + status = NSP_REG_VAL(NSP_REG_ADDR(desc, offset, NSP_STATUS)); + + while ((status & 0x1) && (retry < retries)) { + status = NSP_REG_VAL(NSP_REG_ADDR(desc, offset, NSP_STATUS)); + retry++; + sleep(1); + } + + if (retry == retries) + return -1; + + if (write) { + ret = nspu_buff_write(desc, buffer, wsize); + if (ret) + return ret; + + /* Expansion BAR changes when writing the buffer */ + nspu_xlate(desc, NSP_BASE, &offset); + } + + NSP_REG_VAL(NSP_REG_ADDR(desc, offset, NSP_COMMAND)) = + (uint64_t)wsize << 32 | (uint64_t)cmd << 16 | 1; + + retry = 0; + + cmd_reg = NSP_REG_VAL(NSP_REG_ADDR(desc, offset, NSP_COMMAND)); + while ((cmd_reg & 0x1) && (retry < retries)) { + cmd_reg = NSP_REG_VAL(NSP_REG_ADDR(desc, offset, NSP_COMMAND)); + retry++; + sleep(1); + } + if (retry == retries) + return -1; + + retry = 0; + status = NSP_REG_VAL(NSP_REG_ADDR(desc, offset, NSP_STATUS)); + while ((status & 0x1) && (retry < retries)) { + status = NSP_REG_VAL(NSP_REG_ADDR(desc, offset, NSP_STATUS)); + retry++; + sleep(1); + } + + if (retry == retries) + return -1; + + ret = status & (0xff << 8); + if (ret) + return ret; + + if (read) { + ret = nspu_buff_read(desc, buffer, rsize); + if (ret) + return ret; + } + + return ret; +} + +static int +nfp_fw_reset(nspu_desc_t *nspu_desc) +{ + int res; + + res = nspu_command(nspu_desc, NSP_CMD_RESET, 0, 0, 0, 0, 0); + + if (res < 0) + RTE_LOG(INFO, PMD, "fw reset failed: error %d", res); + + return res; +} + +#define DEFAULT_FW_PATH "/lib/firmware/netronome" +#define DEFAULT_FW_FILENAME "nic_dpdk_default.nffw" + +static int +nfp_fw_upload(nspu_desc_t *nspu_desc) +{ + int fw_f; + char *fw_buf; + char filename[100]; + struct stat file_stat; + off_t fsize, bytes; + ssize_t size; + int ret; + + size = nspu_desc->buf_size; + + sprintf(filename, "%s/%s", DEFAULT_FW_PATH, DEFAULT_FW_FILENAME); + fw_f = open(filename, O_RDONLY); + if (fw_f < 0) { + RTE_LOG(INFO, PMD, "Firmware file %s/%s not found.", + DEFAULT_FW_PATH, DEFAULT_FW_FILENAME); + return -ENOENT; + } + + fstat(fw_f, &file_stat); + + fsize = file_stat.st_size; + RTE_LOG(DEBUG, PMD, "Firmware file with size: %" PRIu64 "\n", + (uint64_t)fsize); + + if (fsize > (off_t)size) { + RTE_LOG(INFO, PMD, "fw file too big: %" PRIu64 + " bytes (%" PRIu64 " max)", + (uint64_t)fsize, (uint64_t)size); + return -EINVAL; + } + + fw_buf = malloc((size_t)size); + if (!fw_buf) { + RTE_LOG(INFO, PMD, "malloc failed for fw buffer"); + return -ENOMEM; + } + memset(fw_buf, 0, size); + + bytes = read(fw_f, fw_buf, fsize); + if (bytes != fsize) { + RTE_LOG(INFO, PMD, "Reading fw to buffer failed.\n" + "Just %" PRIu64 " of %" PRIu64 " bytes read.", + (uint64_t)bytes, (uint64_t)fsize); + free(fw_buf); + return -EIO; + } + + ret = nspu_command(nspu_desc, NSP_CMD_FW_LOAD, 0, 1, fw_buf, 0, bytes); + + free(fw_buf); + + return ret; +} + +/* Firmware symbol descriptor size */ +#define NFP_SYM_DESC_LEN 40 + +#define SYMBOL_DATA(b, off) (*(int64_t *)((b) + (off))) +#define SYMBOL_UDATA(b, off) (*(uint64_t *)((b) + (off))) + +/* Firmware symbols contain information about how to access what they + * represent. It can be as simple as an numeric variable declared at a + * specific NFP memory, but it can also be more complex structures and + * related to specific hardware functionalities or components. Target, + * domain and address allow to create the BAR window for accessing such + * hw object and size defines the length to map. + * + * A vNIC is a network interface implemented inside the NFP and using a + * subset of device PCI BARs. Specific firmware symbols allow to map those + * vNIC bars by host drivers like the NFP PMD. + * + * Accessing what the symbol represents implies to map the access through + * a PCI BAR window. NFP expansion BARs are used in this regard through + * the NSPU interface. + */ +static int +nfp_nspu_set_bar_from_symbl(nspu_desc_t *desc, const char *symbl, + uint32_t expbar, uint64_t *pcie_offset, + ssize_t *size) +{ + int64_t type; + int64_t target; + int64_t domain; + uint64_t addr; + char *sym_buf; + int ret = 0; + + sym_buf = malloc(desc->buf_size); + strncpy(sym_buf, symbl, strlen(symbl)); + ret = nspu_command(desc, NSP_CMD_GET_SYMBOL, 1, 1, sym_buf, + NFP_SYM_DESC_LEN, strlen(symbl)); + if (ret) { + RTE_LOG(DEBUG, PMD, "symbol resolution (%s) failed\n", symbl); + goto clean; + } + + /* Reading symbol information */ + type = SYMBOL_DATA(sym_buf, 0); + target = SYMBOL_DATA(sym_buf, 8); + domain = SYMBOL_DATA(sym_buf, 16); + addr = SYMBOL_UDATA(sym_buf, 24); + *size = (ssize_t)SYMBOL_UDATA(sym_buf, 32); + + if (type != 1) { + RTE_LOG(INFO, PMD, "wrong symbol type\n"); + ret = -EINVAL; + goto clean; + } + if (!(target == 7 || target == -7)) { + RTE_LOG(INFO, PMD, "wrong symbol target\n"); + ret = -EINVAL; + goto clean; + } + if (domain == 8 || domain == 9) { + RTE_LOG(INFO, PMD, "wrong symbol domain\n"); + ret = -EINVAL; + goto clean; + } + + /* Adjusting address based on symbol location */ + if ((domain >= 24) && (domain < 28) && (target == 7)) { + addr = 1ULL << 37 | addr | ((uint64_t)domain & 0x3) << 35; + } else { + addr = 1ULL << 39 | addr | ((uint64_t)domain & 0x3f) << 32; + if (target == -7) + target = 7; + } + + /* Configuring NFP expansion bar for mapping specific PCI BAR window */ + nfp_nspu_mem_bar_cfg(desc, expbar, target, addr, pcie_offset); + + /* This is the PCI BAR offset to use by the host */ + *pcie_offset |= ((expbar & 0x7) << (desc->barsz - 3)); + +clean: + free(sym_buf); + return ret; +} + +int +nfp_nsp_fw_setup(nspu_desc_t *desc, const char *sym, uint64_t *pcie_offset) +{ + ssize_t bar0_sym_size; + + /* If the symbol resolution works, it implies a firmware app + * is already there. + */ + if (!nfp_nspu_set_bar_from_symbl(desc, sym, NFP_NET_PF_CFG_EXP_BAR, + pcie_offset, &bar0_sym_size)) + return 0; + + /* No firmware app detected or not the right one */ + RTE_LOG(INFO, PMD, "No firmware detected. Resetting NFP...\n"); + if (nfp_fw_reset(desc) < 0) { + RTE_LOG(ERR, PMD, "nfp fw reset failed\n"); + return -ENODEV; + } + + RTE_LOG(INFO, PMD, "Reset done.\n"); + RTE_LOG(INFO, PMD, "Uploading firmware...\n"); + + if (nfp_fw_upload(desc) < 0) { + RTE_LOG(ERR, PMD, "nfp fw upload failed\n"); + return -ENODEV; + } + + RTE_LOG(INFO, PMD, "Done.\n"); + + /* Now the symbol should be there */ + if (nfp_nspu_set_bar_from_symbl(desc, sym, NFP_NET_PF_CFG_EXP_BAR, + pcie_offset, &bar0_sym_size)) { + RTE_LOG(ERR, PMD, "nfp PF BAR symbol resolution failed\n"); + return -ENODEV; + } + + return 0; +} + +int +nfp_nsp_map_ctrl_bar(nspu_desc_t *desc, uint64_t *pcie_offset) +{ + ssize_t bar0_sym_size; + + if (nfp_nspu_set_bar_from_symbl(desc, "_pf0_net_bar0", + NFP_NET_PF_CFG_EXP_BAR, + pcie_offset, &bar0_sym_size)) + return -ENODEV; + + return 0; +} + +/* + * This is a hardcoded fixed NFP internal CPP bus address for the hw queues unit + * inside the PCIE island. + */ +#define NFP_CPP_PCIE_QUEUES ((uint64_t)(1ULL << 39) | 0x80000 | \ + ((uint64_t)0x4 & 0x3f) << 32) + +/* Configure a specific NFP expansion bar for accessing the vNIC rx/tx BARs */ +void +nfp_nsp_map_queues_bar(nspu_desc_t *desc, uint64_t *pcie_offset) +{ + nfp_nspu_mem_bar_cfg(desc, NFP_NET_PF_HW_QUEUES_EXP_BAR, 0, + NFP_CPP_PCIE_QUEUES, pcie_offset); + + /* This is the pcie offset to use by the host */ + *pcie_offset |= ((NFP_NET_PF_HW_QUEUES_EXP_BAR & 0x7) << (27 - 3)); +} + +int +nfp_nsp_eth_config(nspu_desc_t *desc, int port, int up) +{ + union eth_table_entry *entries, *entry; + int modified; + int ret, idx; + int i; + + idx = port; + + RTE_LOG(INFO, PMD, "Hw ethernet port %d configure...\n", port); + rte_spinlock_lock(&desc->nsp_lock); + entries = malloc(NSP_ETH_TABLE_SIZE); + if (!entries) { + rte_spinlock_unlock(&desc->nsp_lock); + return -ENOMEM; + } + + ret = nspu_command(desc, NSP_CMD_READ_ETH_TABLE, 1, 0, entries, + NSP_ETH_TABLE_SIZE, 0); + if (ret) { + rte_spinlock_unlock(&desc->nsp_lock); + return ret; + } + + entry = entries; + + for (i = 0; i < NSP_ETH_MAX_COUNT; i++) { + /* ports in use do not appear sequentially in the table */ + if (!(entry->port & NSP_ETH_PORT_LANES_MASK)) { + /* entry not in use */ + entry++; + continue; + } + if (idx == 0) + break; + idx--; + entry++; + } + + if (i == NSP_ETH_MAX_COUNT) { + rte_spinlock_unlock(&desc->nsp_lock); + return -EINVAL; + } + + if (up && !(entry->state & NSP_ETH_STATE_CONFIGURED)) { + entry->control |= NSP_ETH_STATE_CONFIGURED; + modified = 1; + } + + if (!up && (entry->state & NSP_ETH_STATE_CONFIGURED)) { + entry->control &= ~NSP_ETH_STATE_CONFIGURED; + modified = 1; + } + + if (modified) { + ret = nspu_command(desc, NSP_CMD_WRITE_ETH_TABLE, 0, 1, entries, + 0, NSP_ETH_TABLE_SIZE); + if (!ret) + RTE_LOG(INFO, PMD, + "Hw ethernet port %d configure done\n", port); + else + RTE_LOG(INFO, PMD, + "Hw ethernet port %d configure failed\n", port); + } + rte_spinlock_unlock(&desc->nsp_lock); + return ret; +} + +int +nfp_nsp_eth_read_table(nspu_desc_t *desc, union eth_table_entry **table) +{ + int ret; + + RTE_LOG(INFO, PMD, "Reading hw ethernet table...\n"); + /* port 0 allocates the eth table and read it using NSPU */ + *table = malloc(NSP_ETH_TABLE_SIZE); + if (!table) + return -ENOMEM; + + ret = nspu_command(desc, NSP_CMD_READ_ETH_TABLE, 1, 0, *table, + NSP_ETH_TABLE_SIZE, 0); + if (ret) + return ret; + + RTE_LOG(INFO, PMD, "Done\n"); + + return 0; +} |