common/cnxk: add BPHY IRQ setup

Add support for initializing baseband PHY IRQs. While at it
also add support for reverting back to the default state.

Signed-off-by: Jakub Palider <jpalider@marvell.com>
Signed-off-by: Tomasz Duszynski <tduszynski@marvell.com>
Reviewed-by: Jerin Jacob <jerinj@marvell.com>

drivers/common/cnxk/meson.build

@@ -13,6 +13,7 @@ deps = ['eal', 'pci', 'bus_pci', 'mbuf']
 sources = files(
         'roc_bphy.c',
         'roc_bphy_cgx.c',
+        'roc_bphy_irq.c',
         'roc_dev.c',
         'roc_idev.c',
         'roc_irq.c',

drivers/common/cnxk/roc_bphy_irq.c

@@ -0,0 +1,96 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(C) 2021 Marvell.
+ */
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <unistd.h>
+
+#include "roc_api.h"
+#include "roc_bphy_irq.h"
+
+#define ROC_BPHY_MEMZONE_NAME "roc_bphy_mz"
+#define ROC_BPHY_CTR_DEV_PATH "/dev/otx-bphy-ctr"
+
+#define ROC_BPHY_IOC_MAGIC 0xF3
+#define ROC_BPHY_IOC_GET_BPHY_MAX_IRQ	_IOR(ROC_BPHY_IOC_MAGIC, 3, uint64_t)
+#define ROC_BPHY_IOC_GET_BPHY_BMASK_IRQ _IOR(ROC_BPHY_IOC_MAGIC, 4, uint64_t)
+
+struct roc_bphy_irq_chip *
+roc_bphy_intr_init(void)
+{
+	struct roc_bphy_irq_chip *irq_chip;
+	uint64_t max_irq, i, avail_irqs;
+	int fd, ret;
+
+	fd = open(ROC_BPHY_CTR_DEV_PATH, O_RDWR | O_SYNC);
+	if (fd < 0) {
+		plt_err("Failed to open %s", ROC_BPHY_CTR_DEV_PATH);
+		return NULL;
+	}
+
+	ret = ioctl(fd, ROC_BPHY_IOC_GET_BPHY_MAX_IRQ, &max_irq);
+	if (ret < 0) {
+		plt_err("Failed to get max irq number via ioctl");
+		goto err_ioctl;
+	}
+
+	ret = ioctl(fd, ROC_BPHY_IOC_GET_BPHY_BMASK_IRQ, &avail_irqs);
+	if (ret < 0) {
+		plt_err("Failed to get available irqs bitmask via ioctl");
+		goto err_ioctl;
+	}
+
+	irq_chip = plt_zmalloc(sizeof(*irq_chip), 0);
+	if (irq_chip == NULL) {
+		plt_err("Failed to alloc irq_chip");
+		goto err_alloc_chip;
+	}
+
+	irq_chip->intfd = fd;
+	irq_chip->max_irq = max_irq;
+	irq_chip->avail_irq_bmask = avail_irqs;
+	irq_chip->irq_vecs =
+		plt_zmalloc(irq_chip->max_irq * sizeof(*irq_chip->irq_vecs), 0);
+	if (irq_chip->irq_vecs == NULL) {
+		plt_err("Failed to alloc irq_chip irq_vecs");
+		goto err_alloc_irq;
+	}
+
+	irq_chip->mz_name = plt_zmalloc(strlen(ROC_BPHY_MEMZONE_NAME) + 1, 0);
+	if (irq_chip->mz_name == NULL) {
+		plt_err("Failed to alloc irq_chip name");
+		goto err_alloc_name;
+	}
+	plt_strlcpy(irq_chip->mz_name, ROC_BPHY_MEMZONE_NAME,
+		    strlen(ROC_BPHY_MEMZONE_NAME) + 1);
+
+	for (i = 0; i < irq_chip->max_irq; i++) {
+		irq_chip->irq_vecs[i].fd = -1;
+		irq_chip->irq_vecs[i].handler_cpu = -1;
+	}
+
+	return irq_chip;
+
+err_alloc_name:
+	plt_free(irq_chip->irq_vecs);
+
+err_alloc_irq:
+	plt_free(irq_chip);
+
+err_ioctl:
+err_alloc_chip:
+	close(fd);
+	return NULL;
+}
+
+void
+roc_bphy_intr_fini(struct roc_bphy_irq_chip *irq_chip)
+{
+	if (irq_chip == NULL)
+		return;
+
+	close(irq_chip->intfd);
+	plt_free(irq_chip->mz_name);
+	plt_free(irq_chip->irq_vecs);
+	plt_free(irq_chip);
+}

drivers/common/cnxk/roc_bphy_irq.h

@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(C) 2021 Marvell.
+ */
+
+#ifndef _ROC_BPHY_IRQ_
+#define _ROC_BPHY_IRQ_
+
+struct roc_bphy_irq_vec {
+	int fd;
+	int handler_cpu;
+	void (*handler)(int irq_num, void *isr_data);
+	void *isr_data;
+};
+
+struct roc_bphy_irq_chip {
+	struct roc_bphy_irq_vec *irq_vecs;
+	uint64_t max_irq;
+	uint64_t avail_irq_bmask;
+	int intfd;
+	int n_handlers;
+	char *mz_name;
+};
+
+__roc_api struct roc_bphy_irq_chip *roc_bphy_intr_init(void);
+__roc_api void roc_bphy_intr_fini(struct roc_bphy_irq_chip *irq_chip);
+
+#endif /* _ROC_BPHY_IRQ_ */

drivers/common/cnxk/version.map

@@ -22,6 +22,8 @@ INTERNAL {
 	roc_bphy_cgx_stop_rxtx;
 	roc_bphy_dev_fini;
 	roc_bphy_dev_init;
+	roc_bphy_intr_fini;
+	roc_bphy_intr_init;
 	roc_clk_freq_get;
 	roc_error_msg_get;
 	roc_idev_lmt_base_addr_get;