[PATCH v20 02/13] common/zsda: add zsdadev driver

[Hanxiao Li <li.hanxiao@zte.com.cn>]

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Add basic zsdadev init and register PCI probe functions

Signed-off-by: Hanxiao Li <li.hanxiao@zte.com.cn>
---
 MAINTAINERS                       |   3 +
 drivers/common/zsda/meson.build   |  13 ++
 drivers/common/zsda/zsda_device.c | 191 ++++++++++++++++++++++++++++++
 drivers/common/zsda/zsda_device.h |  53 +++++++++
 drivers/meson.build               |   1 +
 5 files changed, 261 insertions(+)
 create mode 100644 drivers/common/zsda/meson.build
 create mode 100644 drivers/common/zsda/zsda_device.c
 create mode 100644 drivers/common/zsda/zsda_device.h

diff --git a/MAINTAINERS b/MAINTAINERS
index c5a703b5c0..0318d7357c 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1268,6 +1268,9 @@ F: drivers/compress/zlib/
 F: doc/guides/compressdevs/zlib.rst
 F: doc/guides/compressdevs/features/zlib.ini
 
+ZTE Storage Data Accelerator(ZSDA)
+M: Hanxiao Li <li.hanxiao@zte.com.cn>
+F: drivers/common/zsda/
 
 DMAdev Drivers
 --------------
diff --git a/drivers/common/zsda/meson.build b/drivers/common/zsda/meson.build
new file mode 100644
index 0000000000..68bc549c27
--- /dev/null
+++ b/drivers/common/zsda/meson.build
@@ -0,0 +1,13 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright(c) 2024 ZTE Corporation
+
+if is_windows
+    build = false
+    reason = 'not supported on Windows'
+    subdir_done()
+endif
+
+deps += ['bus_pci', 'mbuf']
+sources += files(
+		'zsda_device.c',
+		)
diff --git a/drivers/common/zsda/zsda_device.c b/drivers/common/zsda/zsda_device.c
new file mode 100644
index 0000000000..8d691b3bb8
--- /dev/null
+++ b/drivers/common/zsda/zsda_device.c
@@ -0,0 +1,191 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2024 ZTE Corporation
+ */
+
+
+#include <errno.h>
+#include <stdint.h>
+
+#include <rte_bus_pci.h>
+
+#include "zsda_device.h"
+
+/* per-process array of device data */
+struct zsda_device_info zsda_devs[RTE_PMD_ZSDA_MAX_PCI_DEVICES];
+static int zsda_nb_pci_devices;
+
+/*
+ * The set of PCI devices this driver supports
+ */
+static const struct rte_pci_id pci_id_zsda_map[] = {
+	{
+		RTE_PCI_DEVICE(0x1cf2, 0x8050),
+	},
+	{
+		RTE_PCI_DEVICE(0x1cf2, 0x8051),
+	},
+	{.device_id = 0},
+};
+
+static struct zsda_pci_device *
+zsda_pci_get_named_dev(const char *name)
+{
+	unsigned int i;
+
+	if (name == NULL)
+		return NULL;
+
+	for (i = 0; i < RTE_PMD_ZSDA_MAX_PCI_DEVICES; i++) {
+		if (zsda_devs[i].mz &&
+		    (strcmp(((struct zsda_pci_device *)zsda_devs[i].mz->addr)
+				    ->name,
+			    name) == 0))
+			return (struct zsda_pci_device *)zsda_devs[i].mz->addr;
+	}
+
+	return NULL;
+}
+static uint8_t
+zsda_pci_find_free_device_index(void)
+{
+	uint32_t dev_id;
+
+	for (dev_id = 0; dev_id < RTE_PMD_ZSDA_MAX_PCI_DEVICES; dev_id++)
+		if (zsda_devs[dev_id].mz == NULL)
+			break;
+
+	return dev_id & (ZSDA_MAX_DEV - 1);
+}
+
+static struct zsda_pci_device *
+zsda_get_zsda_dev_from_pci_dev(const struct rte_pci_device *pci_dev)
+{
+	char name[ZSDA_DEV_NAME_MAX_LEN];
+
+	rte_pci_device_name(&pci_dev->addr, name, sizeof(name));
+
+	return zsda_pci_get_named_dev(name);
+}
+
+static struct zsda_pci_device *
+zsda_pci_device_allocate(struct rte_pci_device *pci_dev)
+{
+	struct zsda_pci_device *zsda_pci_dev;
+	uint8_t zsda_dev_id;
+	char name[ZSDA_DEV_NAME_MAX_LEN];
+	unsigned int socket_id = rte_socket_id();
+
+	rte_pci_device_name(&pci_dev->addr, name, sizeof(name));
+	snprintf(name + strlen(name), (ZSDA_DEV_NAME_MAX_LEN - strlen(name)),
+		 "_zsda");
+	if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
+		const struct rte_memzone *mz = rte_memzone_lookup(name);
+
+		if (mz == NULL)
+			return NULL;
+		zsda_pci_dev = mz->addr;
+		zsda_devs[zsda_pci_dev->zsda_dev_id].mz = mz;
+		zsda_devs[zsda_pci_dev->zsda_dev_id].pci_dev = pci_dev;
+		zsda_nb_pci_devices++;
+		return zsda_pci_dev;
+	}
+
+	if (zsda_pci_get_named_dev(name) != NULL)
+		return NULL;
+
+	zsda_dev_id = zsda_pci_find_free_device_index();
+
+	if (zsda_dev_id == (RTE_PMD_ZSDA_MAX_PCI_DEVICES - 1))
+		return NULL;
+
+	zsda_devs[zsda_dev_id].mz =
+		rte_memzone_reserve(name, sizeof(struct zsda_pci_device),
+				    (int)(socket_id & 0xfff), 0);
+
+	if (zsda_devs[zsda_dev_id].mz == NULL)
+		return NULL;
+
+	zsda_pci_dev = zsda_devs[zsda_dev_id].mz->addr;
+	memset(zsda_pci_dev, 0, sizeof(*zsda_pci_dev));
+	memcpy(zsda_pci_dev->name, name, ZSDA_DEV_NAME_MAX_LEN);
+	zsda_pci_dev->zsda_dev_id = zsda_dev_id;
+	zsda_pci_dev->pci_dev = pci_dev;
+	zsda_devs[zsda_dev_id].pci_dev = pci_dev;
+
+	zsda_nb_pci_devices++;
+
+	return zsda_pci_dev;
+}
+
+static int
+zsda_pci_device_release(const struct rte_pci_device *pci_dev)
+{
+	struct zsda_pci_device *zsda_pci_dev;
+	struct zsda_device_info *inst;
+	char name[ZSDA_DEV_NAME_MAX_LEN];
+
+	if (pci_dev == NULL)
+		return -EINVAL;
+
+	rte_pci_device_name(&pci_dev->addr, name, sizeof(name));
+
+	snprintf(name + strlen(name),
+		 ZSDA_DEV_NAME_MAX_LEN - (strlen(name) - 1), "_zsda");
+	zsda_pci_dev = zsda_pci_get_named_dev(name);
+	if (zsda_pci_dev != NULL) {
+		inst = &zsda_devs[zsda_pci_dev->zsda_dev_id];
+
+		if (rte_eal_process_type() == RTE_PROC_PRIMARY)
+			rte_memzone_free(inst->mz);
+
+		memset(inst, 0, sizeof(struct zsda_device_info));
+		zsda_nb_pci_devices--;
+	}
+	return 0;
+}
+
+static int
+zsda_pci_dev_destroy(const struct rte_pci_device *pci_dev)
+{
+	return zsda_pci_device_release(pci_dev);
+}
+
+static int
+zsda_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
+	       struct rte_pci_device *pci_dev)
+{
+	int ret = 0;
+	struct zsda_pci_device *zsda_pci_dev;
+
+	zsda_pci_dev = zsda_pci_device_allocate(pci_dev);
+	if (zsda_pci_dev == NULL)
+		return -ENODEV;
+
+	return ret;
+}
+
+static int
+zsda_pci_remove(struct rte_pci_device *pci_dev)
+{
+	struct zsda_pci_device *zsda_pci_dev;
+
+	if (pci_dev == NULL)
+		return -EINVAL;
+
+	zsda_pci_dev = zsda_get_zsda_dev_from_pci_dev(pci_dev);
+	if (zsda_pci_dev == NULL)
+		return 0;
+
+	return zsda_pci_dev_destroy(pci_dev);
+}
+
+static struct rte_pci_driver rte_zsda_pmd = {
+	.id_table = pci_id_zsda_map,
+	.drv_flags = RTE_PCI_DRV_NEED_MAPPING,
+	.probe = zsda_pci_probe,
+	.remove = zsda_pci_remove };
+
+RTE_PMD_REGISTER_PCI(ZSDA_PCI_NAME, rte_zsda_pmd);
+RTE_PMD_REGISTER_PCI_TABLE(ZSDA_PCI_NAME, pci_id_zsda_map);
+RTE_PMD_REGISTER_KMOD_DEP(ZSDA_PCI_NAME,
+			  "* igb_uio | uio_pci_generic | vfio-pci");
diff --git a/drivers/common/zsda/zsda_device.h b/drivers/common/zsda/zsda_device.h
new file mode 100644
index 0000000000..33a7fb0d9c
--- /dev/null
+++ b/drivers/common/zsda/zsda_device.h
@@ -0,0 +1,53 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2024 ZTE Corporation
+ */
+
+#ifndef _ZSDA_DEVICE_H_
+#define _ZSDA_DEVICE_H_
+
+#include <rte_memzone.h>
+#include "bus_pci_driver.h"
+
+#define MAX_QPS_ON_FUNCTION		128
+#define ZSDA_DEV_NAME_MAX_LEN	64
+#define ZSDA_MAX_SERVICES (0)
+#define ZSDA_MAX_DEV RTE_PMD_ZSDA_MAX_PCI_DEVICES
+
+struct zsda_device_info {
+	const struct rte_memzone *mz;
+	/**< mz to store the：  struct zsda_pci_device ,    so it can be
+	 * shared across processes
+	 */
+
+	struct rte_pci_device *pci_dev;
+};
+
+extern struct zsda_device_info zsda_devs[];
+
+struct zsda_qp_hw_data {
+	bool used;
+
+	uint8_t tx_ring_num;
+	uint8_t rx_ring_num;
+	uint16_t tx_msg_size;
+	uint16_t rx_msg_size;
+};
+
+struct zsda_qp_hw {
+	struct zsda_qp_hw_data data[MAX_QPS_ON_FUNCTION];
+};
+
+struct zsda_pci_device {
+	/* Data used by all services */
+	char name[ZSDA_DEV_NAME_MAX_LEN];
+	/**< Name of zsda pci device */
+	uint8_t zsda_dev_id;
+	/**< Id of device instance for this zsda pci device */
+
+	struct rte_pci_device *pci_dev;
+
+	struct zsda_qp_hw zsda_hw_qps[ZSDA_MAX_SERVICES];
+	uint16_t zsda_qp_hw_num[ZSDA_MAX_SERVICES];
+};
+
+#endif /* _ZSDA_DEVICE_H_ */
diff --git a/drivers/meson.build b/drivers/meson.build
index 66931d4241..cdbd3b1c17 100644
--- a/drivers/meson.build
+++ b/drivers/meson.build
@@ -17,6 +17,7 @@ subdirs = [
         'common/nitrox',  # depends on bus.
         'common/qat',     # depends on bus.
         'common/sfc_efx', # depends on bus.
+        'common/zsda',    # depends on bus.
         'mempool',        # depends on common and bus.
         'dma',            # depends on common and bus.
         'net',            # depends on common, bus, mempool
-- 
2.27.0

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