--- /dev/null
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2018 Netronome Systems, Inc.
+ * All rights reserved.
+ */
+
+#include <assert.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <sys/types.h>
+
+#include <rte_byteorder.h>
+
+#include "nfp_cpp.h"
+#include "nfp_target.h"
+#include "nfp6000/nfp6000.h"
+#include "nfp6000/nfp_xpb.h"
+#include "nfp_nffw.h"
+
+#define NFP_PL_DEVICE_ID 0x00000004
+#define NFP_PL_DEVICE_ID_MASK 0xff
+
+#define NFP6000_ARM_GCSR_SOFTMODEL0 0x00400144
+
+void
+nfp_cpp_priv_set(struct nfp_cpp *cpp, void *priv)
+{
+ cpp->priv = priv;
+}
+
+void *
+nfp_cpp_priv(struct nfp_cpp *cpp)
+{
+ return cpp->priv;
+}
+
+void
+nfp_cpp_model_set(struct nfp_cpp *cpp, uint32_t model)
+{
+ cpp->model = model;
+}
+
+uint32_t
+nfp_cpp_model(struct nfp_cpp *cpp)
+{
+ if (!cpp)
+ return NFP_CPP_MODEL_INVALID;
+
+ if (cpp->model == 0)
+ cpp->model = __nfp_cpp_model_autodetect(cpp);
+
+ return cpp->model;
+}
+
+void
+nfp_cpp_interface_set(struct nfp_cpp *cpp, uint32_t interface)
+{
+ cpp->interface = interface;
+}
+
+int
+nfp_cpp_serial(struct nfp_cpp *cpp, const uint8_t **serial)
+{
+ *serial = cpp->serial;
+ return cpp->serial_len;
+}
+
+int
+nfp_cpp_serial_set(struct nfp_cpp *cpp, const uint8_t *serial,
+ size_t serial_len)
+{
+ if (cpp->serial_len)
+ free(cpp->serial);
+
+ cpp->serial = malloc(serial_len);
+ if (!cpp->serial)
+ return -1;
+
+ memcpy(cpp->serial, serial, serial_len);
+ cpp->serial_len = serial_len;
+
+ return 0;
+}
+
+uint16_t
+nfp_cpp_interface(struct nfp_cpp *cpp)
+{
+ if (!cpp)
+ return NFP_CPP_INTERFACE(NFP_CPP_INTERFACE_TYPE_INVALID, 0, 0);
+
+ return cpp->interface;
+}
+
+void *
+nfp_cpp_area_priv(struct nfp_cpp_area *cpp_area)
+{
+ return &cpp_area[1];
+}
+
+struct nfp_cpp *
+nfp_cpp_area_cpp(struct nfp_cpp_area *cpp_area)
+{
+ return cpp_area->cpp;
+}
+
+const char *
+nfp_cpp_area_name(struct nfp_cpp_area *cpp_area)
+{
+ return cpp_area->name;
+}
+
+/*
+ * nfp_cpp_area_alloc - allocate a new CPP area
+ * @cpp: CPP handle
+ * @dest: CPP id
+ * @address: start address on CPP target
+ * @size: size of area in bytes
+ *
+ * Allocate and initialize a CPP area structure. The area must later
+ * be locked down with an 'acquire' before it can be safely accessed.
+ *
+ * NOTE: @address and @size must be 32-bit aligned values.
+ */
+struct nfp_cpp_area *
+nfp_cpp_area_alloc_with_name(struct nfp_cpp *cpp, uint32_t dest,
+ const char *name, unsigned long long address,
+ unsigned long size)
+{
+ struct nfp_cpp_area *area;
+ uint64_t tmp64 = (uint64_t)address;
+ int tmp, err;
+
+ if (!cpp)
+ return NULL;
+
+ /* CPP bus uses only a 40-bit address */
+ if ((address + size) > (1ULL << 40))
+ return NFP_ERRPTR(EFAULT);
+
+ /* Remap from cpp_island to cpp_target */
+ err = nfp_target_cpp(dest, tmp64, &dest, &tmp64, cpp->imb_cat_table);
+ if (err < 0)
+ return NULL;
+
+ address = (unsigned long long)tmp64;
+
+ if (!name)
+ name = "";
+
+ area = calloc(1, sizeof(*area) + cpp->op->area_priv_size +
+ strlen(name) + 1);
+ if (!area)
+ return NULL;
+
+ area->cpp = cpp;
+ area->name = ((char *)area) + sizeof(*area) + cpp->op->area_priv_size;
+ memcpy(area->name, name, strlen(name) + 1);
+
+ /*
+ * Preserve errno around the call to area_init, since most
+ * implementations will blindly call nfp_target_action_width()for both
+ * read or write modes, and that will set errno to EINVAL.
+ */
+ tmp = errno;
+
+ err = cpp->op->area_init(area, dest, address, size);
+ if (err < 0) {
+ free(area);
+ return NULL;
+ }
+
+ /* Restore errno */
+ errno = tmp;
+
+ area->offset = address;
+ area->size = size;
+
+ return area;
+}
+
+struct nfp_cpp_area *
+nfp_cpp_area_alloc(struct nfp_cpp *cpp, uint32_t dest,
+ unsigned long long address, unsigned long size)
+{
+ return nfp_cpp_area_alloc_with_name(cpp, dest, NULL, address, size);
+}
+
+/*
+ * nfp_cpp_area_alloc_acquire - allocate a new CPP area and lock it down
+ *
+ * @cpp: CPP handle
+ * @dest: CPP id
+ * @address: start address on CPP target
+ * @size: size of area
+ *
+ * Allocate and initilizae a CPP area structure, and lock it down so
+ * that it can be accessed directly.
+ *
+ * NOTE: @address and @size must be 32-bit aligned values.
+ *
+ * NOTE: The area must also be 'released' when the structure is freed.
+ */
+struct nfp_cpp_area *
+nfp_cpp_area_alloc_acquire(struct nfp_cpp *cpp, uint32_t destination,
+ unsigned long long address, unsigned long size)
+{
+ struct nfp_cpp_area *area;
+
+ area = nfp_cpp_area_alloc(cpp, destination, address, size);
+ if (!area)
+ return NULL;
+
+ if (nfp_cpp_area_acquire(area)) {
+ nfp_cpp_area_free(area);
+ return NULL;
+ }
+
+ return area;
+}
+
+/*
+ * nfp_cpp_area_free - free up the CPP area
+ * area: CPP area handle
+ *
+ * Frees up memory resources held by the CPP area.
+ */
+void
+nfp_cpp_area_free(struct nfp_cpp_area *area)
+{
+ if (area->cpp->op->area_cleanup)
+ area->cpp->op->area_cleanup(area);
+ free(area);
+}
+
+/*
+ * nfp_cpp_area_release_free - release CPP area and free it
+ * area: CPP area handle
+ *
+ * Releases CPP area and frees up memory resources held by the it.
+ */
+void
+nfp_cpp_area_release_free(struct nfp_cpp_area *area)
+{
+ nfp_cpp_area_release(area);
+ nfp_cpp_area_free(area);
+}
+
+/*
+ * nfp_cpp_area_acquire - lock down a CPP area for access
+ * @area: CPP area handle
+ *
+ * Locks down the CPP area for a potential long term activity. Area
+ * must always be locked down before being accessed.
+ */
+int
+nfp_cpp_area_acquire(struct nfp_cpp_area *area)
+{
+ if (area->cpp->op->area_acquire) {
+ int err = area->cpp->op->area_acquire(area);
+
+ if (err < 0)
+ return -1;
+ }
+
+ return 0;
+}
+
+/*
+ * nfp_cpp_area_release - release a locked down CPP area
+ * @area: CPP area handle
+ *
+ * Releases a previously locked down CPP area.
+ */
+void
+nfp_cpp_area_release(struct nfp_cpp_area *area)
+{
+ if (area->cpp->op->area_release)
+ area->cpp->op->area_release(area);
+}
+
+/*
+ * nfp_cpp_area_iomem() - get IOMEM region for CPP area
+ *
+ * @area: CPP area handle
+ *
+ * Returns an iomem pointer for use with readl()/writel() style operations.
+ *
+ * NOTE: Area must have been locked down with an 'acquire'.
+ *
+ * Return: pointer to the area, or NULL
+ */
+void *
+nfp_cpp_area_iomem(struct nfp_cpp_area *area)
+{
+ void *iomem = NULL;
+
+ if (area->cpp->op->area_iomem)
+ iomem = area->cpp->op->area_iomem(area);
+
+ return iomem;
+}
+
+/*
+ * nfp_cpp_area_read - read data from CPP area
+ *
+ * @area: CPP area handle
+ * @offset: offset into CPP area
+ * @kernel_vaddr: kernel address to put data into
+ * @length: number of bytes to read
+ *
+ * Read data from indicated CPP region.
+ *
+ * NOTE: @offset and @length must be 32-bit aligned values.
+ *
+ * NOTE: Area must have been locked down with an 'acquire'.
+ */
+int
+nfp_cpp_area_read(struct nfp_cpp_area *area, unsigned long offset,
+ void *kernel_vaddr, size_t length)
+{
+ if ((offset + length) > area->size)
+ return NFP_ERRNO(EFAULT);
+
+ return area->cpp->op->area_read(area, kernel_vaddr, offset, length);
+}
+
+/*
+ * nfp_cpp_area_write - write data to CPP area
+ *
+ * @area: CPP area handle
+ * @offset: offset into CPP area
+ * @kernel_vaddr: kernel address to read data from
+ * @length: number of bytes to write
+ *
+ * Write data to indicated CPP region.
+ *
+ * NOTE: @offset and @length must be 32-bit aligned values.
+ *
+ * NOTE: Area must have been locked down with an 'acquire'.
+ */
+int
+nfp_cpp_area_write(struct nfp_cpp_area *area, unsigned long offset,
+ const void *kernel_vaddr, size_t length)
+{
+ if ((offset + length) > area->size)
+ return NFP_ERRNO(EFAULT);
+
+ return area->cpp->op->area_write(area, kernel_vaddr, offset, length);
+}
+
+void *
+nfp_cpp_area_mapped(struct nfp_cpp_area *area)
+{
+ if (area->cpp->op->area_mapped)
+ return area->cpp->op->area_mapped(area);
+ return NULL;
+}
+
+/*
+ * nfp_cpp_area_check_range - check if address range fits in CPP area
+ *
+ * @area: CPP area handle
+ * @offset: offset into CPP area
+ * @length: size of address range in bytes
+ *
+ * Check if address range fits within CPP area. Return 0 if area fits
+ * or -1 on error.
+ */
+int
+nfp_cpp_area_check_range(struct nfp_cpp_area *area, unsigned long long offset,
+ unsigned long length)
+{
+ if (((offset + length) > area->size))
+ return NFP_ERRNO(EFAULT);
+
+ return 0;
+}
+
+/*
+ * Return the correct CPP address, and fixup xpb_addr as needed,
+ * based upon NFP model.
+ */
+static uint32_t
+nfp_xpb_to_cpp(struct nfp_cpp *cpp, uint32_t *xpb_addr)
+{
+ uint32_t xpb;
+ int island;
+
+ if (!NFP_CPP_MODEL_IS_6000(cpp->model))
+ return 0;
+
+ xpb = NFP_CPP_ID(14, NFP_CPP_ACTION_RW, 0);
+
+ /*
+ * Ensure that non-local XPB accesses go out through the
+ * global XPBM bus.
+ */
+ island = ((*xpb_addr) >> 24) & 0x3f;
+
+ if (!island)
+ return xpb;
+
+ if (island == 1) {
+ /*
+ * Accesses to the ARM Island overlay uses Island 0
+ * Global Bit
+ */
+ (*xpb_addr) &= ~0x7f000000;
+ if (*xpb_addr < 0x60000)
+ *xpb_addr |= (1 << 30);
+ else
+ /* And only non-ARM interfaces use island id = 1 */
+ if (NFP_CPP_INTERFACE_TYPE_of(nfp_cpp_interface(cpp)) !=
+ NFP_CPP_INTERFACE_TYPE_ARM)
+ *xpb_addr |= (1 << 24);
+ } else {
+ (*xpb_addr) |= (1 << 30);
+ }
+
+ return xpb;
+}
+
+int
+nfp_cpp_area_readl(struct nfp_cpp_area *area, unsigned long offset,
+ uint32_t *value)
+{
+ int sz;
+ uint32_t tmp = 0;
+
+ sz = nfp_cpp_area_read(area, offset, &tmp, sizeof(tmp));
+ *value = rte_le_to_cpu_32(tmp);
+
+ return (sz == sizeof(*value)) ? 0 : -1;
+}
+
+int
+nfp_cpp_area_writel(struct nfp_cpp_area *area, unsigned long offset,
+ uint32_t value)
+{
+ int sz;
+
+ value = rte_cpu_to_le_32(value);
+ sz = nfp_cpp_area_write(area, offset, &value, sizeof(value));
+ return (sz == sizeof(value)) ? 0 : -1;
+}
+
+int
+nfp_cpp_area_readq(struct nfp_cpp_area *area, unsigned long offset,
+ uint64_t *value)
+{
+ int sz;
+ uint64_t tmp = 0;
+
+ sz = nfp_cpp_area_read(area, offset, &tmp, sizeof(tmp));
+ *value = rte_le_to_cpu_64(tmp);
+
+ return (sz == sizeof(*value)) ? 0 : -1;
+}
+
+int
+nfp_cpp_area_writeq(struct nfp_cpp_area *area, unsigned long offset,
+ uint64_t value)
+{
+ int sz;
+
+ value = rte_cpu_to_le_64(value);
+ sz = nfp_cpp_area_write(area, offset, &value, sizeof(value));
+
+ return (sz == sizeof(value)) ? 0 : -1;
+}
+
+int
+nfp_cpp_readl(struct nfp_cpp *cpp, uint32_t cpp_id, unsigned long long address,
+ uint32_t *value)
+{
+ int sz;
+ uint32_t tmp;
+
+ sz = nfp_cpp_read(cpp, cpp_id, address, &tmp, sizeof(tmp));
+ *value = rte_le_to_cpu_32(tmp);
+
+ return (sz == sizeof(*value)) ? 0 : -1;
+}
+
+int
+nfp_cpp_writel(struct nfp_cpp *cpp, uint32_t cpp_id, unsigned long long address,
+ uint32_t value)
+{
+ int sz;
+
+ value = rte_cpu_to_le_32(value);
+ sz = nfp_cpp_write(cpp, cpp_id, address, &value, sizeof(value));
+
+ return (sz == sizeof(value)) ? 0 : -1;
+}
+
+int
+nfp_cpp_readq(struct nfp_cpp *cpp, uint32_t cpp_id, unsigned long long address,
+ uint64_t *value)
+{
+ int sz;
+ uint64_t tmp;
+
+ sz = nfp_cpp_read(cpp, cpp_id, address, &tmp, sizeof(tmp));
+ *value = rte_le_to_cpu_64(tmp);
+
+ return (sz == sizeof(*value)) ? 0 : -1;
+}
+
+int
+nfp_cpp_writeq(struct nfp_cpp *cpp, uint32_t cpp_id, unsigned long long address,
+ uint64_t value)
+{
+ int sz;
+
+ value = rte_cpu_to_le_64(value);
+ sz = nfp_cpp_write(cpp, cpp_id, address, &value, sizeof(value));
+
+ return (sz == sizeof(value)) ? 0 : -1;
+}
+
+int
+nfp_xpb_writel(struct nfp_cpp *cpp, uint32_t xpb_addr, uint32_t value)
+{
+ uint32_t cpp_dest;
+
+ cpp_dest = nfp_xpb_to_cpp(cpp, &xpb_addr);
+
+ return nfp_cpp_writel(cpp, cpp_dest, xpb_addr, value);
+}
+
+int
+nfp_xpb_readl(struct nfp_cpp *cpp, uint32_t xpb_addr, uint32_t *value)
+{
+ uint32_t cpp_dest;
+
+ cpp_dest = nfp_xpb_to_cpp(cpp, &xpb_addr);
+
+ return nfp_cpp_readl(cpp, cpp_dest, xpb_addr, value);
+}
+
+static struct nfp_cpp *
+nfp_cpp_alloc(const char *devname, int driver_lock_needed)
+{
+ const struct nfp_cpp_operations *ops;
+ struct nfp_cpp *cpp;
+ int err;
+
+ ops = nfp_cpp_transport_operations();
+
+ if (!ops || !ops->init)
+ return NFP_ERRPTR(EINVAL);
+
+ cpp = calloc(1, sizeof(*cpp));
+ if (!cpp)
+ return NULL;
+
+ cpp->op = ops;
+ cpp->driver_lock_needed = driver_lock_needed;
+
+ if (cpp->op->init) {
+ err = cpp->op->init(cpp, devname);
+ if (err < 0) {
+ free(cpp);
+ return NULL;
+ }
+ }
+
+ if (NFP_CPP_MODEL_IS_6000(nfp_cpp_model(cpp))) {
+ uint32_t xpbaddr;
+ size_t tgt;
+
+ for (tgt = 0; tgt < ARRAY_SIZE(cpp->imb_cat_table); tgt++) {
+ /* Hardcoded XPB IMB Base, island 0 */
+ xpbaddr = 0x000a0000 + (tgt * 4);
+ err = nfp_xpb_readl(cpp, xpbaddr,
+ (uint32_t *)&cpp->imb_cat_table[tgt]);
+ if (err < 0) {
+ free(cpp);
+ return NULL;
+ }
+ }
+ }
+
+ return cpp;
+}
+
+/*
+ * nfp_cpp_free - free the CPP handle
+ * @cpp: CPP handle
+ */
+void
+nfp_cpp_free(struct nfp_cpp *cpp)
+{
+ if (cpp->op && cpp->op->free)
+ cpp->op->free(cpp);
+
+ if (cpp->serial_len)
+ free(cpp->serial);
+
+ free(cpp);
+}
+
+struct nfp_cpp *
+nfp_cpp_from_device_name(const char *devname, int driver_lock_needed)
+{
+ return nfp_cpp_alloc(devname, driver_lock_needed);
+}
+
+/*
+ * Modify bits of a 32-bit value from the XPB bus
+ *
+ * @param cpp NFP CPP device handle
+ * @param xpb_tgt XPB target and address
+ * @param mask mask of bits to alter
+ * @param value value to modify
+ *
+ * @return 0 on success, or -1 on failure (and set errno accordingly).
+ */
+int
+nfp_xpb_writelm(struct nfp_cpp *cpp, uint32_t xpb_tgt, uint32_t mask,
+ uint32_t value)
+{
+ int err;
+ uint32_t tmp;
+
+ err = nfp_xpb_readl(cpp, xpb_tgt, &tmp);
+ if (err < 0)
+ return err;
+
+ tmp &= ~mask;
+ tmp |= (mask & value);
+ return nfp_xpb_writel(cpp, xpb_tgt, tmp);
+}
+
+/*
+ * Modify bits of a 32-bit value from the XPB bus
+ *
+ * @param cpp NFP CPP device handle
+ * @param xpb_tgt XPB target and address
+ * @param mask mask of bits to alter
+ * @param value value to monitor for
+ * @param timeout_us maximum number of us to wait (-1 for forever)
+ *
+ * @return >= 0 on success, or -1 on failure (and set errno accordingly).
+ */
+int
+nfp_xpb_waitlm(struct nfp_cpp *cpp, uint32_t xpb_tgt, uint32_t mask,
+ uint32_t value, int timeout_us)
+{
+ uint32_t tmp;
+ int err;
+
+ do {
+ err = nfp_xpb_readl(cpp, xpb_tgt, &tmp);
+ if (err < 0)
+ goto exit;
+
+ if ((tmp & mask) == (value & mask)) {
+ if (timeout_us < 0)
+ timeout_us = 0;
+ break;
+ }
+
+ if (timeout_us < 0)
+ continue;
+
+ timeout_us -= 100;
+ usleep(100);
+ } while (timeout_us >= 0);
+
+ if (timeout_us < 0)
+ err = NFP_ERRNO(ETIMEDOUT);
+ else
+ err = timeout_us;
+
+exit:
+ return err;
+}
+
+/*
+ * nfp_cpp_read - read from CPP target
+ * @cpp: CPP handle
+ * @destination: CPP id
+ * @address: offset into CPP target
+ * @kernel_vaddr: kernel buffer for result
+ * @length: number of bytes to read
+ */
+int
+nfp_cpp_read(struct nfp_cpp *cpp, uint32_t destination,
+ unsigned long long address, void *kernel_vaddr, size_t length)
+{
+ struct nfp_cpp_area *area;
+ int err;
+
+ area = nfp_cpp_area_alloc_acquire(cpp, destination, address, length);
+ if (!area) {
+ printf("Area allocation/acquire failed\n");
+ return -1;
+ }
+
+ err = nfp_cpp_area_read(area, 0, kernel_vaddr, length);
+
+ nfp_cpp_area_release_free(area);
+ return err;
+}
+
+/*
+ * nfp_cpp_write - write to CPP target
+ * @cpp: CPP handle
+ * @destination: CPP id
+ * @address: offset into CPP target
+ * @kernel_vaddr: kernel buffer to read from
+ * @length: number of bytes to write
+ */
+int
+nfp_cpp_write(struct nfp_cpp *cpp, uint32_t destination,
+ unsigned long long address, const void *kernel_vaddr,
+ size_t length)
+{
+ struct nfp_cpp_area *area;
+ int err;
+
+ area = nfp_cpp_area_alloc_acquire(cpp, destination, address, length);
+ if (!area)
+ return -1;
+
+ err = nfp_cpp_area_write(area, 0, kernel_vaddr, length);
+
+ nfp_cpp_area_release_free(area);
+ return err;
+}
+
+/*
+ * nfp_cpp_area_fill - fill a CPP area with a value
+ * @area: CPP area
+ * @offset: offset into CPP area
+ * @value: value to fill with
+ * @length: length of area to fill
+ */
+int
+nfp_cpp_area_fill(struct nfp_cpp_area *area, unsigned long offset,
+ uint32_t value, size_t length)
+{
+ int err;
+ size_t i;
+ uint64_t value64;
+
+ value = rte_cpu_to_le_32(value);
+ value64 = ((uint64_t)value << 32) | value;
+
+ if ((offset + length) > area->size)
+ return NFP_ERRNO(EINVAL);
+
+ if ((area->offset + offset) & 3)
+ return NFP_ERRNO(EINVAL);
+
+ if (((area->offset + offset) & 7) == 4 && length >= 4) {
+ err = nfp_cpp_area_write(area, offset, &value, sizeof(value));
+ if (err < 0)
+ return err;
+ if (err != sizeof(value))
+ return NFP_ERRNO(ENOSPC);
+ offset += sizeof(value);
+ length -= sizeof(value);
+ }
+
+ for (i = 0; (i + sizeof(value)) < length; i += sizeof(value64)) {
+ err =
+ nfp_cpp_area_write(area, offset + i, &value64,
+ sizeof(value64));
+ if (err < 0)
+ return err;
+ if (err != sizeof(value64))
+ return NFP_ERRNO(ENOSPC);
+ }
+
+ if ((i + sizeof(value)) <= length) {
+ err =
+ nfp_cpp_area_write(area, offset + i, &value, sizeof(value));
+ if (err < 0)
+ return err;
+ if (err != sizeof(value))
+ return NFP_ERRNO(ENOSPC);
+ i += sizeof(value);
+ }
+
+ return (int)i;
+}
+
+/*
+ * NOTE: This code should not use nfp_xpb_* functions,
+ * as those are model-specific
+ */
+uint32_t
+__nfp_cpp_model_autodetect(struct nfp_cpp *cpp)
+{
+ uint32_t arm_id = NFP_CPP_ID(NFP_CPP_TARGET_ARM, 0, 0);
+ uint32_t model = 0;
+
+ nfp_cpp_readl(cpp, arm_id, NFP6000_ARM_GCSR_SOFTMODEL0, &model);
+
+ if (NFP_CPP_MODEL_IS_6000(model)) {
+ uint32_t tmp;
+
+ nfp_cpp_model_set(cpp, model);
+
+ /* The PL's PluDeviceID revision code is authoratative */
+ model &= ~0xff;
+ nfp_xpb_readl(cpp, NFP_XPB_DEVICE(1, 1, 16) +
+ NFP_PL_DEVICE_ID, &tmp);
+ model |= (NFP_PL_DEVICE_ID_MASK & tmp) - 0x10;
+ }
+
+ return model;
+}
+
+/*
+ * nfp_cpp_map_area() - Helper function to map an area
+ * @cpp: NFP CPP handler
+ * @domain: CPP domain
+ * @target: CPP target
+ * @addr: CPP address
+ * @size: Size of the area
+ * @area: Area handle (output)
+ *
+ * Map an area of IOMEM access. To undo the effect of this function call
+ * @nfp_cpp_area_release_free(*area).
+ *
+ * Return: Pointer to memory mapped area or ERR_PTR
+ */
+uint8_t *
+nfp_cpp_map_area(struct nfp_cpp *cpp, int domain, int target, uint64_t addr,
+ unsigned long size, struct nfp_cpp_area **area)
+{
+ uint8_t *res;
+ uint32_t dest;
+
+ dest = NFP_CPP_ISLAND_ID(target, NFP_CPP_ACTION_RW, 0, domain);
+
+ *area = nfp_cpp_area_alloc_acquire(cpp, dest, addr, size);
+ if (!*area)
+ goto err_eio;
+
+ res = nfp_cpp_area_iomem(*area);
+ if (!res)
+ goto err_release_free;
+
+ return res;
+
+err_release_free:
+ nfp_cpp_area_release_free(*area);
+err_eio:
+ return NULL;
+}
Code Review / deb_dpdk.git / blobdiff