Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

10 files changed, 2855 insertions, 0 deletions

diff --git a/drivers/net/ethernet/amd/pds_core/Makefile b/drivers/net/ethernet/amd/pds_core/Makefile
new file mode 100644
index 0000000000..8239742e68
--- /dev/null
+++ b/drivers/net/ethernet/amd/pds_core/Makefile
@@ -0,0 +1,13 @@
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c) 2023 Advanced Micro Devices, Inc.
+
+obj-$(CONFIG_PDS_CORE) := pds_core.o
+
+pds_core-y := main.o \
+	      devlink.o \
+	      auxbus.o \
+	      dev.o \
+	      adminq.o \
+	      core.o \
+	      debugfs.o \
+	      fw.o
diff --git a/drivers/net/ethernet/amd/pds_core/adminq.c b/drivers/net/ethernet/amd/pds_core/adminq.c
new file mode 100644
index 0000000000..5beadabc21
--- /dev/null
+++ b/drivers/net/ethernet/amd/pds_core/adminq.c
@@ -0,0 +1,290 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright(c) 2023 Advanced Micro Devices, Inc */
+
+#include <linux/dynamic_debug.h>
+
+#include "core.h"
+
+struct pdsc_wait_context {
+	struct pdsc_qcq *qcq;
+	struct completion wait_completion;
+};
+
+static int pdsc_process_notifyq(struct pdsc_qcq *qcq)
+{
+	union pds_core_notifyq_comp *comp;
+	struct pdsc *pdsc = qcq->pdsc;
+	struct pdsc_cq *cq = &qcq->cq;
+	struct pdsc_cq_info *cq_info;
+	int nq_work = 0;
+	u64 eid;
+
+	cq_info = &cq->info[cq->tail_idx];
+	comp = cq_info->comp;
+	eid = le64_to_cpu(comp->event.eid);
+	while (eid > pdsc->last_eid) {
+		u16 ecode = le16_to_cpu(comp->event.ecode);
+
+		switch (ecode) {
+		case PDS_EVENT_LINK_CHANGE:
+			dev_info(pdsc->dev, "NotifyQ LINK_CHANGE ecode %d eid %lld\n",
+				 ecode, eid);
+			pdsc_notify(PDS_EVENT_LINK_CHANGE, comp);
+			break;
+
+		case PDS_EVENT_RESET:
+			dev_info(pdsc->dev, "NotifyQ RESET ecode %d eid %lld\n",
+				 ecode, eid);
+			pdsc_notify(PDS_EVENT_RESET, comp);
+			break;
+
+		case PDS_EVENT_XCVR:
+			dev_info(pdsc->dev, "NotifyQ XCVR ecode %d eid %lld\n",
+				 ecode, eid);
+			break;
+
+		default:
+			dev_info(pdsc->dev, "NotifyQ ecode %d eid %lld\n",
+				 ecode, eid);
+			break;
+		}
+
+		pdsc->last_eid = eid;
+		cq->tail_idx = (cq->tail_idx + 1) & (cq->num_descs - 1);
+		cq_info = &cq->info[cq->tail_idx];
+		comp = cq_info->comp;
+		eid = le64_to_cpu(comp->event.eid);
+
+		nq_work++;
+	}
+
+	qcq->accum_work += nq_work;
+
+	return nq_work;
+}
+
+void pdsc_process_adminq(struct pdsc_qcq *qcq)
+{
+	union pds_core_adminq_comp *comp;
+	struct pdsc_queue *q = &qcq->q;
+	struct pdsc *pdsc = qcq->pdsc;
+	struct pdsc_cq *cq = &qcq->cq;
+	struct pdsc_q_info *q_info;
+	unsigned long irqflags;
+	int nq_work = 0;
+	int aq_work = 0;
+	int credits;
+
+	/* Don't process AdminQ when shutting down */
+	if (pdsc->state & BIT_ULL(PDSC_S_STOPPING_DRIVER)) {
+		dev_err(pdsc->dev, "%s: called while PDSC_S_STOPPING_DRIVER\n",
+			__func__);
+		return;
+	}
+
+	/* Check for NotifyQ event */
+	nq_work = pdsc_process_notifyq(&pdsc->notifyqcq);
+
+	/* Check for empty queue, which can happen if the interrupt was
+	 * for a NotifyQ event and there are no new AdminQ completions.
+	 */
+	if (q->tail_idx == q->head_idx)
+		goto credits;
+
+	/* Find the first completion to clean,
+	 * run the callback in the related q_info,
+	 * and continue while we still match done color
+	 */
+	spin_lock_irqsave(&pdsc->adminq_lock, irqflags);
+	comp = cq->info[cq->tail_idx].comp;
+	while (pdsc_color_match(comp->color, cq->done_color)) {
+		q_info = &q->info[q->tail_idx];
+		q->tail_idx = (q->tail_idx + 1) & (q->num_descs - 1);
+
+		/* Copy out the completion data */
+		memcpy(q_info->dest, comp, sizeof(*comp));
+
+		complete_all(&q_info->wc->wait_completion);
+
+		if (cq->tail_idx == cq->num_descs - 1)
+			cq->done_color = !cq->done_color;
+		cq->tail_idx = (cq->tail_idx + 1) & (cq->num_descs - 1);
+		comp = cq->info[cq->tail_idx].comp;
+
+		aq_work++;
+	}
+	spin_unlock_irqrestore(&pdsc->adminq_lock, irqflags);
+
+	qcq->accum_work += aq_work;
+
+credits:
+	/* Return the interrupt credits, one for each completion */
+	credits = nq_work + aq_work;
+	if (credits)
+		pds_core_intr_credits(&pdsc->intr_ctrl[qcq->intx],
+				      credits,
+				      PDS_CORE_INTR_CRED_REARM);
+}
+
+void pdsc_work_thread(struct work_struct *work)
+{
+	struct pdsc_qcq *qcq = container_of(work, struct pdsc_qcq, work);
+
+	pdsc_process_adminq(qcq);
+}
+
+irqreturn_t pdsc_adminq_isr(int irq, void *data)
+{
+	struct pdsc_qcq *qcq = data;
+	struct pdsc *pdsc = qcq->pdsc;
+
+	/* Don't process AdminQ when shutting down */
+	if (pdsc->state & BIT_ULL(PDSC_S_STOPPING_DRIVER)) {
+		dev_err(pdsc->dev, "%s: called while PDSC_S_STOPPING_DRIVER\n",
+			__func__);
+		return IRQ_HANDLED;
+	}
+
+	queue_work(pdsc->wq, &qcq->work);
+	pds_core_intr_mask(&pdsc->intr_ctrl[qcq->intx], PDS_CORE_INTR_MASK_CLEAR);
+
+	return IRQ_HANDLED;
+}
+
+static int __pdsc_adminq_post(struct pdsc *pdsc,
+			      struct pdsc_qcq *qcq,
+			      union pds_core_adminq_cmd *cmd,
+			      union pds_core_adminq_comp *comp,
+			      struct pdsc_wait_context *wc)
+{
+	struct pdsc_queue *q = &qcq->q;
+	struct pdsc_q_info *q_info;
+	unsigned long irqflags;
+	unsigned int avail;
+	int index;
+	int ret;
+
+	spin_lock_irqsave(&pdsc->adminq_lock, irqflags);
+
+	/* Check for space in the queue */
+	avail = q->tail_idx;
+	if (q->head_idx >= avail)
+		avail += q->num_descs - q->head_idx - 1;
+	else
+		avail -= q->head_idx + 1;
+	if (!avail) {
+		ret = -ENOSPC;
+		goto err_out_unlock;
+	}
+
+	/* Check that the FW is running */
+	if (!pdsc_is_fw_running(pdsc)) {
+		u8 fw_status = ioread8(&pdsc->info_regs->fw_status);
+
+		dev_info(pdsc->dev, "%s: post failed - fw not running %#02x:\n",
+			 __func__, fw_status);
+		ret = -ENXIO;
+
+		goto err_out_unlock;
+	}
+
+	/* Post the request */
+	index = q->head_idx;
+	q_info = &q->info[index];
+	q_info->wc = wc;
+	q_info->dest = comp;
+	memcpy(q_info->desc, cmd, sizeof(*cmd));
+
+	dev_dbg(pdsc->dev, "head_idx %d tail_idx %d\n",
+		q->head_idx, q->tail_idx);
+	dev_dbg(pdsc->dev, "post admin queue command:\n");
+	dynamic_hex_dump("cmd ", DUMP_PREFIX_OFFSET, 16, 1,
+			 cmd, sizeof(*cmd), true);
+
+	q->head_idx = (q->head_idx + 1) & (q->num_descs - 1);
+
+	pds_core_dbell_ring(pdsc->kern_dbpage,
+			    q->hw_type, q->dbval | q->head_idx);
+	ret = index;
+
+err_out_unlock:
+	spin_unlock_irqrestore(&pdsc->adminq_lock, irqflags);
+	return ret;
+}
+
+int pdsc_adminq_post(struct pdsc *pdsc,
+		     union pds_core_adminq_cmd *cmd,
+		     union pds_core_adminq_comp *comp,
+		     bool fast_poll)
+{
+	struct pdsc_wait_context wc = {
+		.wait_completion =
+			COMPLETION_INITIALIZER_ONSTACK(wc.wait_completion),
+	};
+	unsigned long poll_interval = 1;
+	unsigned long poll_jiffies;
+	unsigned long time_limit;
+	unsigned long time_start;
+	unsigned long time_done;
+	unsigned long remaining;
+	int err = 0;
+	int index;
+
+	wc.qcq = &pdsc->adminqcq;
+	index = __pdsc_adminq_post(pdsc, &pdsc->adminqcq, cmd, comp, &wc);
+	if (index < 0) {
+		err = index;
+		goto err_out;
+	}
+
+	time_start = jiffies;
+	time_limit = time_start + HZ * pdsc->devcmd_timeout;
+	do {
+		/* Timeslice the actual wait to catch IO errors etc early */
+		poll_jiffies = msecs_to_jiffies(poll_interval);
+		remaining = wait_for_completion_timeout(&wc.wait_completion,
+							poll_jiffies);
+		if (remaining)
+			break;
+
+		if (!pdsc_is_fw_running(pdsc)) {
+			u8 fw_status = ioread8(&pdsc->info_regs->fw_status);
+
+			dev_dbg(pdsc->dev, "%s: post wait failed - fw not running %#02x:\n",
+				__func__, fw_status);
+			err = -ENXIO;
+			break;
+		}
+
+		/* When fast_poll is not requested, prevent aggressive polling
+		 * on failures due to timeouts by doing exponential back off.
+		 */
+		if (!fast_poll && poll_interval < PDSC_ADMINQ_MAX_POLL_INTERVAL)
+			poll_interval <<= 1;
+	} while (time_before(jiffies, time_limit));
+	time_done = jiffies;
+	dev_dbg(pdsc->dev, "%s: elapsed %d msecs\n",
+		__func__, jiffies_to_msecs(time_done - time_start));
+
+	/* Check the results */
+	if (time_after_eq(time_done, time_limit))
+		err = -ETIMEDOUT;
+
+	dev_dbg(pdsc->dev, "read admin queue completion idx %d:\n", index);
+	dynamic_hex_dump("comp ", DUMP_PREFIX_OFFSET, 16, 1,
+			 comp, sizeof(*comp), true);
+
+	if (remaining && comp->status)
+		err = pdsc_err_to_errno(comp->status);
+
+err_out:
+	if (err) {
+		dev_dbg(pdsc->dev, "%s: opcode %d status %d err %pe\n",
+			__func__, cmd->opcode, comp->status, ERR_PTR(err));
+		if (err == -ENXIO || err == -ETIMEDOUT)
+			queue_work(pdsc->wq, &pdsc->health_work);
+	}
+
+	return err;
+}
+EXPORT_SYMBOL_GPL(pdsc_adminq_post);
diff --git a/drivers/net/ethernet/amd/pds_core/auxbus.c b/drivers/net/ethernet/amd/pds_core/auxbus.c
new file mode 100644
index 0000000000..11c23a7f31
--- /dev/null
+++ b/drivers/net/ethernet/amd/pds_core/auxbus.c
@@ -0,0 +1,254 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright(c) 2023 Advanced Micro Devices, Inc */
+
+#include <linux/pci.h>
+
+#include "core.h"
+#include <linux/pds/pds_auxbus.h>
+
+/**
+ * pds_client_register - Link the client to the firmware
+ * @pf:		ptr to the PF driver's private data struct
+ * @devname:	name that includes service into, e.g. pds_core.vDPA
+ *
+ * Return: positive client ID (ci) on success, or
+ *         negative for error
+ */
+int pds_client_register(struct pdsc *pf, char *devname)
+{
+	union pds_core_adminq_comp comp = {};
+	union pds_core_adminq_cmd cmd = {};
+	int err;
+	u16 ci;
+
+	cmd.client_reg.opcode = PDS_AQ_CMD_CLIENT_REG;
+	strscpy(cmd.client_reg.devname, devname,
+		sizeof(cmd.client_reg.devname));
+
+	err = pdsc_adminq_post(pf, &cmd, &comp, false);
+	if (err) {
+		dev_info(pf->dev, "register dev_name %s with DSC failed, status %d: %pe\n",
+			 devname, comp.status, ERR_PTR(err));
+		return err;
+	}
+
+	ci = le16_to_cpu(comp.client_reg.client_id);
+	if (!ci) {
+		dev_err(pf->dev, "%s: device returned null client_id\n",
+			__func__);
+		return -EIO;
+	}
+
+	dev_dbg(pf->dev, "%s: device returned client_id %d for %s\n",
+		__func__, ci, devname);
+
+	return ci;
+}
+EXPORT_SYMBOL_GPL(pds_client_register);
+
+/**
+ * pds_client_unregister - Unlink the client from the firmware
+ * @pf:		ptr to the PF driver's private data struct
+ * @client_id:	id returned from pds_client_register()
+ *
+ * Return: 0 on success, or
+ *         negative for error
+ */
+int pds_client_unregister(struct pdsc *pf, u16 client_id)
+{
+	union pds_core_adminq_comp comp = {};
+	union pds_core_adminq_cmd cmd = {};
+	int err;
+
+	cmd.client_unreg.opcode = PDS_AQ_CMD_CLIENT_UNREG;
+	cmd.client_unreg.client_id = cpu_to_le16(client_id);
+
+	err = pdsc_adminq_post(pf, &cmd, &comp, false);
+	if (err)
+		dev_info(pf->dev, "unregister client_id %d failed, status %d: %pe\n",
+			 client_id, comp.status, ERR_PTR(err));
+
+	return err;
+}
+EXPORT_SYMBOL_GPL(pds_client_unregister);
+
+/**
+ * pds_client_adminq_cmd - Process an adminq request for the client
+ * @padev:   ptr to the client device
+ * @req:     ptr to buffer with request
+ * @req_len: length of actual struct used for request
+ * @resp:    ptr to buffer where answer is to be copied
+ * @flags:   optional flags from pds_core_adminq_flags
+ *
+ * Return: 0 on success, or
+ *         negative for error
+ *
+ * Client sends pointers to request and response buffers
+ * Core copies request data into pds_core_client_request_cmd
+ * Core sets other fields as needed
+ * Core posts to AdminQ
+ * Core copies completion data into response buffer
+ */
+int pds_client_adminq_cmd(struct pds_auxiliary_dev *padev,
+			  union pds_core_adminq_cmd *req,
+			  size_t req_len,
+			  union pds_core_adminq_comp *resp,
+			  u64 flags)
+{
+	union pds_core_adminq_cmd cmd = {};
+	struct pci_dev *pf_pdev;
+	struct pdsc *pf;
+	size_t cp_len;
+	int err;
+
+	pf_pdev = pci_physfn(padev->vf_pdev);
+	pf = pci_get_drvdata(pf_pdev);
+
+	dev_dbg(pf->dev, "%s: %s opcode %d\n",
+		__func__, dev_name(&padev->aux_dev.dev), req->opcode);
+
+	if (pf->state)
+		return -ENXIO;
+
+	/* Wrap the client's request */
+	cmd.client_request.opcode = PDS_AQ_CMD_CLIENT_CMD;
+	cmd.client_request.client_id = cpu_to_le16(padev->client_id);
+	cp_len = min_t(size_t, req_len, sizeof(cmd.client_request.client_cmd));
+	memcpy(cmd.client_request.client_cmd, req, cp_len);
+
+	err = pdsc_adminq_post(pf, &cmd, resp,
+			       !!(flags & PDS_AQ_FLAG_FASTPOLL));
+	if (err && err != -EAGAIN)
+		dev_info(pf->dev, "client admin cmd failed: %pe\n",
+			 ERR_PTR(err));
+
+	return err;
+}
+EXPORT_SYMBOL_GPL(pds_client_adminq_cmd);
+
+static void pdsc_auxbus_dev_release(struct device *dev)
+{
+	struct pds_auxiliary_dev *padev =
+		container_of(dev, struct pds_auxiliary_dev, aux_dev.dev);
+
+	kfree(padev);
+}
+
+static struct pds_auxiliary_dev *pdsc_auxbus_dev_register(struct pdsc *cf,
+							  struct pdsc *pf,
+							  u16 client_id,
+							  char *name)
+{
+	struct auxiliary_device *aux_dev;
+	struct pds_auxiliary_dev *padev;
+	int err;
+
+	padev = kzalloc(sizeof(*padev), GFP_KERNEL);
+	if (!padev)
+		return ERR_PTR(-ENOMEM);
+
+	padev->vf_pdev = cf->pdev;
+	padev->client_id = client_id;
+
+	aux_dev = &padev->aux_dev;
+	aux_dev->name = name;
+	aux_dev->id = cf->uid;
+	aux_dev->dev.parent = cf->dev;
+	aux_dev->dev.release = pdsc_auxbus_dev_release;
+
+	err = auxiliary_device_init(aux_dev);
+	if (err < 0) {
+		dev_warn(cf->dev, "auxiliary_device_init of %s failed: %pe\n",
+			 name, ERR_PTR(err));
+		goto err_out;
+	}
+
+	err = auxiliary_device_add(aux_dev);
+	if (err) {
+		dev_warn(cf->dev, "auxiliary_device_add of %s failed: %pe\n",
+			 name, ERR_PTR(err));
+		goto err_out_uninit;
+	}
+
+	return padev;
+
+err_out_uninit:
+	auxiliary_device_uninit(aux_dev);
+err_out:
+	kfree(padev);
+	return ERR_PTR(err);
+}
+
+int pdsc_auxbus_dev_del(struct pdsc *cf, struct pdsc *pf)
+{
+	struct pds_auxiliary_dev *padev;
+	int err = 0;
+
+	mutex_lock(&pf->config_lock);
+
+	padev = pf->vfs[cf->vf_id].padev;
+	if (padev) {
+		pds_client_unregister(pf, padev->client_id);
+		auxiliary_device_delete(&padev->aux_dev);
+		auxiliary_device_uninit(&padev->aux_dev);
+		padev->client_id = 0;
+	}
+	pf->vfs[cf->vf_id].padev = NULL;
+
+	mutex_unlock(&pf->config_lock);
+	return err;
+}
+
+int pdsc_auxbus_dev_add(struct pdsc *cf, struct pdsc *pf)
+{
+	struct pds_auxiliary_dev *padev;
+	enum pds_core_vif_types vt;
+	char devname[PDS_DEVNAME_LEN];
+	u16 vt_support;
+	int client_id;
+	int err = 0;
+
+	mutex_lock(&pf->config_lock);
+
+	/* We only support vDPA so far, so it is the only one to
+	 * be verified that it is available in the Core device and
+	 * enabled in the devlink param.  In the future this might
+	 * become a loop for several VIF types.
+	 */
+
+	/* Verify that the type is supported and enabled.  It is not
+	 * an error if there is no auxbus device support for this
+	 * VF, it just means something else needs to happen with it.
+	 */
+	vt = PDS_DEV_TYPE_VDPA;
+	vt_support = !!le16_to_cpu(pf->dev_ident.vif_types[vt]);
+	if (!(vt_support &&
+	      pf->viftype_status[vt].supported &&
+	      pf->viftype_status[vt].enabled))
+		goto out_unlock;
+
+	/* Need to register with FW and get the client_id before
+	 * creating the aux device so that the aux client can run
+	 * adminq commands as part its probe
+	 */
+	snprintf(devname, sizeof(devname), "%s.%s.%d",
+		 PDS_CORE_DRV_NAME, pf->viftype_status[vt].name, cf->uid);
+	client_id = pds_client_register(pf, devname);
+	if (client_id < 0) {
+		err = client_id;
+		goto out_unlock;
+	}
+
+	padev = pdsc_auxbus_dev_register(cf, pf, client_id,
+					 pf->viftype_status[vt].name);
+	if (IS_ERR(padev)) {
+		pds_client_unregister(pf, client_id);
+		err = PTR_ERR(padev);
+		goto out_unlock;
+	}
+	pf->vfs[cf->vf_id].padev = padev;
+
+out_unlock:
+	mutex_unlock(&pf->config_lock);
+	return err;
+}
diff --git a/drivers/net/ethernet/amd/pds_core/core.c b/drivers/net/ethernet/amd/pds_core/core.c
new file mode 100644
index 0000000000..36f9b932b9
--- /dev/null
+++ b/drivers/net/ethernet/amd/pds_core/core.c
@@ -0,0 +1,600 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright(c) 2023 Advanced Micro Devices, Inc */
+
+#include <linux/pci.h>
+#include <linux/vmalloc.h>
+
+#include "core.h"
+
+static BLOCKING_NOTIFIER_HEAD(pds_notify_chain);
+
+int pdsc_register_notify(struct notifier_block *nb)
+{
+	return blocking_notifier_chain_register(&pds_notify_chain, nb);
+}
+EXPORT_SYMBOL_GPL(pdsc_register_notify);
+
+void pdsc_unregister_notify(struct notifier_block *nb)
+{
+	blocking_notifier_chain_unregister(&pds_notify_chain, nb);
+}
+EXPORT_SYMBOL_GPL(pdsc_unregister_notify);
+
+void pdsc_notify(unsigned long event, void *data)
+{
+	blocking_notifier_call_chain(&pds_notify_chain, event, data);
+}
+
+void pdsc_intr_free(struct pdsc *pdsc, int index)
+{
+	struct pdsc_intr_info *intr_info;
+
+	if (index >= pdsc->nintrs || index < 0) {
+		WARN(true, "bad intr index %d\n", index);
+		return;
+	}
+
+	intr_info = &pdsc->intr_info[index];
+	if (!intr_info->vector)
+		return;
+	dev_dbg(pdsc->dev, "%s: idx %d vec %d name %s\n",
+		__func__, index, intr_info->vector, intr_info->name);
+
+	pds_core_intr_mask(&pdsc->intr_ctrl[index], PDS_CORE_INTR_MASK_SET);
+	pds_core_intr_clean(&pdsc->intr_ctrl[index]);
+
+	free_irq(intr_info->vector, intr_info->data);
+
+	memset(intr_info, 0, sizeof(*intr_info));
+}
+
+int pdsc_intr_alloc(struct pdsc *pdsc, char *name,
+		    irq_handler_t handler, void *data)
+{
+	struct pdsc_intr_info *intr_info;
+	unsigned int index;
+	int err;
+
+	/* Find the first available interrupt */
+	for (index = 0; index < pdsc->nintrs; index++)
+		if (!pdsc->intr_info[index].vector)
+			break;
+	if (index >= pdsc->nintrs) {
+		dev_warn(pdsc->dev, "%s: no intr, index=%d nintrs=%d\n",
+			 __func__, index, pdsc->nintrs);
+		return -ENOSPC;
+	}
+
+	pds_core_intr_clean_flags(&pdsc->intr_ctrl[index],
+				  PDS_CORE_INTR_CRED_RESET_COALESCE);
+
+	intr_info = &pdsc->intr_info[index];
+
+	intr_info->index = index;
+	intr_info->data = data;
+	strscpy(intr_info->name, name, sizeof(intr_info->name));
+
+	/* Get the OS vector number for the interrupt */
+	err = pci_irq_vector(pdsc->pdev, index);
+	if (err < 0) {
+		dev_err(pdsc->dev, "failed to get intr vector index %d: %pe\n",
+			index, ERR_PTR(err));
+		goto err_out_free_intr;
+	}
+	intr_info->vector = err;
+
+	/* Init the device's intr mask */
+	pds_core_intr_clean(&pdsc->intr_ctrl[index]);
+	pds_core_intr_mask_assert(&pdsc->intr_ctrl[index], 1);
+	pds_core_intr_mask(&pdsc->intr_ctrl[index], PDS_CORE_INTR_MASK_SET);
+
+	/* Register the isr with a name */
+	err = request_irq(intr_info->vector, handler, 0, intr_info->name, data);
+	if (err) {
+		dev_err(pdsc->dev, "failed to get intr irq vector %d: %pe\n",
+			intr_info->vector, ERR_PTR(err));
+		goto err_out_free_intr;
+	}
+
+	return index;
+
+err_out_free_intr:
+	pdsc_intr_free(pdsc, index);
+	return err;
+}
+
+static void pdsc_qcq_intr_free(struct pdsc *pdsc, struct pdsc_qcq *qcq)
+{
+	if (!(qcq->flags & PDS_CORE_QCQ_F_INTR) ||
+	    qcq->intx == PDS_CORE_INTR_INDEX_NOT_ASSIGNED)
+		return;
+
+	pdsc_intr_free(pdsc, qcq->intx);
+	qcq->intx = PDS_CORE_INTR_INDEX_NOT_ASSIGNED;
+}
+
+static int pdsc_qcq_intr_alloc(struct pdsc *pdsc, struct pdsc_qcq *qcq)
+{
+	char name[PDSC_INTR_NAME_MAX_SZ];
+	int index;
+
+	if (!(qcq->flags & PDS_CORE_QCQ_F_INTR)) {
+		qcq->intx = PDS_CORE_INTR_INDEX_NOT_ASSIGNED;
+		return 0;
+	}
+
+	snprintf(name, sizeof(name), "%s-%d-%s",
+		 PDS_CORE_DRV_NAME, pdsc->pdev->bus->number, qcq->q.name);
+	index = pdsc_intr_alloc(pdsc, name, pdsc_adminq_isr, qcq);
+	if (index < 0)
+		return index;
+	qcq->intx = index;
+
+	return 0;
+}
+
+void pdsc_qcq_free(struct pdsc *pdsc, struct pdsc_qcq *qcq)
+{
+	struct device *dev = pdsc->dev;
+
+	if (!(qcq && qcq->pdsc))
+		return;
+
+	pdsc_debugfs_del_qcq(qcq);
+
+	pdsc_qcq_intr_free(pdsc, qcq);
+
+	if (qcq->q_base)
+		dma_free_coherent(dev, qcq->q_size,
+				  qcq->q_base, qcq->q_base_pa);
+
+	if (qcq->cq_base)
+		dma_free_coherent(dev, qcq->cq_size,
+				  qcq->cq_base, qcq->cq_base_pa);
+
+	if (qcq->cq.info)
+		vfree(qcq->cq.info);
+
+	if (qcq->q.info)
+		vfree(qcq->q.info);
+
+	memset(qcq, 0, sizeof(*qcq));
+}
+
+static void pdsc_q_map(struct pdsc_queue *q, void *base, dma_addr_t base_pa)
+{
+	struct pdsc_q_info *cur;
+	unsigned int i;
+
+	q->base = base;
+	q->base_pa = base_pa;
+
+	for (i = 0, cur = q->info; i < q->num_descs; i++, cur++)
+		cur->desc = base + (i * q->desc_size);
+}
+
+static void pdsc_cq_map(struct pdsc_cq *cq, void *base, dma_addr_t base_pa)
+{
+	struct pdsc_cq_info *cur;
+	unsigned int i;
+
+	cq->base = base;
+	cq->base_pa = base_pa;
+
+	for (i = 0, cur = cq->info; i < cq->num_descs; i++, cur++)
+		cur->comp = base + (i * cq->desc_size);
+}
+
+int pdsc_qcq_alloc(struct pdsc *pdsc, unsigned int type, unsigned int index,
+		   const char *name, unsigned int flags, unsigned int num_descs,
+		   unsigned int desc_size, unsigned int cq_desc_size,
+		   unsigned int pid, struct pdsc_qcq *qcq)
+{
+	struct device *dev = pdsc->dev;
+	void *q_base, *cq_base;
+	dma_addr_t cq_base_pa;
+	dma_addr_t q_base_pa;
+	int err;
+
+	qcq->q.info = vcalloc(num_descs, sizeof(*qcq->q.info));
+	if (!qcq->q.info) {
+		err = -ENOMEM;
+		goto err_out;
+	}
+
+	qcq->pdsc = pdsc;
+	qcq->flags = flags;
+	INIT_WORK(&qcq->work, pdsc_work_thread);
+
+	qcq->q.type = type;
+	qcq->q.index = index;
+	qcq->q.num_descs = num_descs;
+	qcq->q.desc_size = desc_size;
+	qcq->q.tail_idx = 0;
+	qcq->q.head_idx = 0;
+	qcq->q.pid = pid;
+	snprintf(qcq->q.name, sizeof(qcq->q.name), "%s%u", name, index);
+
+	err = pdsc_qcq_intr_alloc(pdsc, qcq);
+	if (err)
+		goto err_out_free_q_info;
+
+	qcq->cq.info = vcalloc(num_descs, sizeof(*qcq->cq.info));
+	if (!qcq->cq.info) {
+		err = -ENOMEM;
+		goto err_out_free_irq;
+	}
+
+	qcq->cq.bound_intr = &pdsc->intr_info[qcq->intx];
+	qcq->cq.num_descs = num_descs;
+	qcq->cq.desc_size = cq_desc_size;
+	qcq->cq.tail_idx = 0;
+	qcq->cq.done_color = 1;
+
+	if (flags & PDS_CORE_QCQ_F_NOTIFYQ) {
+		/* q & cq need to be contiguous in case of notifyq */
+		qcq->q_size = PDS_PAGE_SIZE +
+			      ALIGN(num_descs * desc_size, PDS_PAGE_SIZE) +
+			      ALIGN(num_descs * cq_desc_size, PDS_PAGE_SIZE);
+		qcq->q_base = dma_alloc_coherent(dev,
+						 qcq->q_size + qcq->cq_size,
+						 &qcq->q_base_pa,
+						 GFP_KERNEL);
+		if (!qcq->q_base) {
+			err = -ENOMEM;
+			goto err_out_free_cq_info;
+		}
+		q_base = PTR_ALIGN(qcq->q_base, PDS_PAGE_SIZE);
+		q_base_pa = ALIGN(qcq->q_base_pa, PDS_PAGE_SIZE);
+		pdsc_q_map(&qcq->q, q_base, q_base_pa);
+
+		cq_base = PTR_ALIGN(q_base +
+				    ALIGN(num_descs * desc_size, PDS_PAGE_SIZE),
+				    PDS_PAGE_SIZE);
+		cq_base_pa = ALIGN(qcq->q_base_pa +
+				   ALIGN(num_descs * desc_size, PDS_PAGE_SIZE),
+				   PDS_PAGE_SIZE);
+
+	} else {
+		/* q DMA descriptors */
+		qcq->q_size = PDS_PAGE_SIZE + (num_descs * desc_size);
+		qcq->q_base = dma_alloc_coherent(dev, qcq->q_size,
+						 &qcq->q_base_pa,
+						 GFP_KERNEL);
+		if (!qcq->q_base) {
+			err = -ENOMEM;
+			goto err_out_free_cq_info;
+		}
+		q_base = PTR_ALIGN(qcq->q_base, PDS_PAGE_SIZE);
+		q_base_pa = ALIGN(qcq->q_base_pa, PDS_PAGE_SIZE);
+		pdsc_q_map(&qcq->q, q_base, q_base_pa);
+
+		/* cq DMA descriptors */
+		qcq->cq_size = PDS_PAGE_SIZE + (num_descs * cq_desc_size);
+		qcq->cq_base = dma_alloc_coherent(dev, qcq->cq_size,
+						  &qcq->cq_base_pa,
+						  GFP_KERNEL);
+		if (!qcq->cq_base) {
+			err = -ENOMEM;
+			goto err_out_free_q;
+		}
+		cq_base = PTR_ALIGN(qcq->cq_base, PDS_PAGE_SIZE);
+		cq_base_pa = ALIGN(qcq->cq_base_pa, PDS_PAGE_SIZE);
+	}
+
+	pdsc_cq_map(&qcq->cq, cq_base, cq_base_pa);
+	qcq->cq.bound_q = &qcq->q;
+
+	pdsc_debugfs_add_qcq(pdsc, qcq);
+
+	return 0;
+
+err_out_free_q:
+	dma_free_coherent(dev, qcq->q_size, qcq->q_base, qcq->q_base_pa);
+err_out_free_cq_info:
+	vfree(qcq->cq.info);
+err_out_free_irq:
+	pdsc_qcq_intr_free(pdsc, qcq);
+err_out_free_q_info:
+	vfree(qcq->q.info);
+	memset(qcq, 0, sizeof(*qcq));
+err_out:
+	dev_err(dev, "qcq alloc of %s%d failed %d\n", name, index, err);
+	return err;
+}
+
+static int pdsc_core_init(struct pdsc *pdsc)
+{
+	union pds_core_dev_comp comp = {};
+	union pds_core_dev_cmd cmd = {
+		.init.opcode = PDS_CORE_CMD_INIT,
+	};
+	struct pds_core_dev_init_data_out cido;
+	struct pds_core_dev_init_data_in cidi;
+	u32 dbid_count;
+	u32 dbpage_num;
+	size_t sz;
+	int err;
+
+	cidi.adminq_q_base = cpu_to_le64(pdsc->adminqcq.q_base_pa);
+	cidi.adminq_cq_base = cpu_to_le64(pdsc->adminqcq.cq_base_pa);
+	cidi.notifyq_cq_base = cpu_to_le64(pdsc->notifyqcq.cq.base_pa);
+	cidi.flags = cpu_to_le32(PDS_CORE_QINIT_F_IRQ | PDS_CORE_QINIT_F_ENA);
+	cidi.intr_index = cpu_to_le16(pdsc->adminqcq.intx);
+	cidi.adminq_ring_size = ilog2(pdsc->adminqcq.q.num_descs);
+	cidi.notifyq_ring_size = ilog2(pdsc->notifyqcq.q.num_descs);
+
+	mutex_lock(&pdsc->devcmd_lock);
+
+	sz = min_t(size_t, sizeof(cidi), sizeof(pdsc->cmd_regs->data));
+	memcpy_toio(&pdsc->cmd_regs->data, &cidi, sz);
+
+	err = pdsc_devcmd_locked(pdsc, &cmd, &comp, pdsc->devcmd_timeout);
+	if (!err) {
+		sz = min_t(size_t, sizeof(cido), sizeof(pdsc->cmd_regs->data));
+		memcpy_fromio(&cido, &pdsc->cmd_regs->data, sz);
+	}
+
+	mutex_unlock(&pdsc->devcmd_lock);
+	if (err) {
+		dev_err(pdsc->dev, "Device init command failed: %pe\n",
+			ERR_PTR(err));
+		return err;
+	}
+
+	pdsc->hw_index = le32_to_cpu(cido.core_hw_index);
+
+	dbid_count = le32_to_cpu(pdsc->dev_ident.ndbpgs_per_lif);
+	dbpage_num = pdsc->hw_index * dbid_count;
+	pdsc->kern_dbpage = pdsc_map_dbpage(pdsc, dbpage_num);
+	if (!pdsc->kern_dbpage) {
+		dev_err(pdsc->dev, "Cannot map dbpage, aborting\n");
+		return -ENOMEM;
+	}
+
+	pdsc->adminqcq.q.hw_type = cido.adminq_hw_type;
+	pdsc->adminqcq.q.hw_index = le32_to_cpu(cido.adminq_hw_index);
+	pdsc->adminqcq.q.dbval = PDS_CORE_DBELL_QID(pdsc->adminqcq.q.hw_index);
+
+	pdsc->notifyqcq.q.hw_type = cido.notifyq_hw_type;
+	pdsc->notifyqcq.q.hw_index = le32_to_cpu(cido.notifyq_hw_index);
+	pdsc->notifyqcq.q.dbval = PDS_CORE_DBELL_QID(pdsc->notifyqcq.q.hw_index);
+
+	pdsc->last_eid = 0;
+
+	return err;
+}
+
+static struct pdsc_viftype pdsc_viftype_defaults[] = {
+	[PDS_DEV_TYPE_VDPA] = { .name = PDS_DEV_TYPE_VDPA_STR,
+				.vif_id = PDS_DEV_TYPE_VDPA,
+				.dl_id = DEVLINK_PARAM_GENERIC_ID_ENABLE_VNET },
+	[PDS_DEV_TYPE_MAX] = {}
+};
+
+static int pdsc_viftypes_init(struct pdsc *pdsc)
+{
+	enum pds_core_vif_types vt;
+
+	pdsc->viftype_status = kzalloc(sizeof(pdsc_viftype_defaults),
+				       GFP_KERNEL);
+	if (!pdsc->viftype_status)
+		return -ENOMEM;
+
+	for (vt = 0; vt < PDS_DEV_TYPE_MAX; vt++) {
+		bool vt_support;
+
+		if (!pdsc_viftype_defaults[vt].name)
+			continue;
+
+		/* Grab the defaults */
+		pdsc->viftype_status[vt] = pdsc_viftype_defaults[vt];
+
+		/* See what the Core device has for support */
+		vt_support = !!le16_to_cpu(pdsc->dev_ident.vif_types[vt]);
+		dev_dbg(pdsc->dev, "VIF %s is %ssupported\n",
+			pdsc->viftype_status[vt].name,
+			vt_support ? "" : "not ");
+
+		pdsc->viftype_status[vt].supported = vt_support;
+	}
+
+	return 0;
+}
+
+int pdsc_setup(struct pdsc *pdsc, bool init)
+{
+	int numdescs;
+	int err;
+
+	if (init)
+		err = pdsc_dev_init(pdsc);
+	else
+		err = pdsc_dev_reinit(pdsc);
+	if (err)
+		return err;
+
+	/* Scale the descriptor ring length based on number of CPUs and VFs */
+	numdescs = max_t(int, PDSC_ADMINQ_MIN_LENGTH, num_online_cpus());
+	numdescs += 2 * pci_sriov_get_totalvfs(pdsc->pdev);
+	numdescs = roundup_pow_of_two(numdescs);
+	err = pdsc_qcq_alloc(pdsc, PDS_CORE_QTYPE_ADMINQ, 0, "adminq",
+			     PDS_CORE_QCQ_F_CORE | PDS_CORE_QCQ_F_INTR,
+			     numdescs,
+			     sizeof(union pds_core_adminq_cmd),
+			     sizeof(union pds_core_adminq_comp),
+			     0, &pdsc->adminqcq);
+	if (err)
+		goto err_out_teardown;
+
+	err = pdsc_qcq_alloc(pdsc, PDS_CORE_QTYPE_NOTIFYQ, 0, "notifyq",
+			     PDS_CORE_QCQ_F_NOTIFYQ,
+			     PDSC_NOTIFYQ_LENGTH,
+			     sizeof(struct pds_core_notifyq_cmd),
+			     sizeof(union pds_core_notifyq_comp),
+			     0, &pdsc->notifyqcq);
+	if (err)
+		goto err_out_teardown;
+
+	/* NotifyQ rides on the AdminQ interrupt */
+	pdsc->notifyqcq.intx = pdsc->adminqcq.intx;
+
+	/* Set up the Core with the AdminQ and NotifyQ info */
+	err = pdsc_core_init(pdsc);
+	if (err)
+		goto err_out_teardown;
+
+	/* Set up the VIFs */
+	err = pdsc_viftypes_init(pdsc);
+	if (err)
+		goto err_out_teardown;
+
+	if (init)
+		pdsc_debugfs_add_viftype(pdsc);
+
+	clear_bit(PDSC_S_FW_DEAD, &pdsc->state);
+	return 0;
+
+err_out_teardown:
+	pdsc_teardown(pdsc, init);
+	return err;
+}
+
+void pdsc_teardown(struct pdsc *pdsc, bool removing)
+{
+	int i;
+
+	if (!pdsc->pdev->is_virtfn)
+		pdsc_devcmd_reset(pdsc);
+	pdsc_qcq_free(pdsc, &pdsc->notifyqcq);
+	pdsc_qcq_free(pdsc, &pdsc->adminqcq);
+
+	kfree(pdsc->viftype_status);
+	pdsc->viftype_status = NULL;
+
+	if (pdsc->intr_info) {
+		for (i = 0; i < pdsc->nintrs; i++)
+			pdsc_intr_free(pdsc, i);
+
+		if (removing) {
+			kfree(pdsc->intr_info);
+			pdsc->intr_info = NULL;
+		}
+	}
+
+	if (pdsc->kern_dbpage) {
+		iounmap(pdsc->kern_dbpage);
+		pdsc->kern_dbpage = NULL;
+	}
+
+	set_bit(PDSC_S_FW_DEAD, &pdsc->state);
+}
+
+int pdsc_start(struct pdsc *pdsc)
+{
+	pds_core_intr_mask(&pdsc->intr_ctrl[pdsc->adminqcq.intx],
+			   PDS_CORE_INTR_MASK_CLEAR);
+
+	return 0;
+}
+
+void pdsc_stop(struct pdsc *pdsc)
+{
+	int i;
+
+	if (!pdsc->intr_info)
+		return;
+
+	/* Mask interrupts that are in use */
+	for (i = 0; i < pdsc->nintrs; i++)
+		if (pdsc->intr_info[i].vector)
+			pds_core_intr_mask(&pdsc->intr_ctrl[i],
+					   PDS_CORE_INTR_MASK_SET);
+}
+
+static void pdsc_fw_down(struct pdsc *pdsc)
+{
+	union pds_core_notifyq_comp reset_event = {
+		.reset.ecode = cpu_to_le16(PDS_EVENT_RESET),
+		.reset.state = 0,
+	};
+
+	if (test_and_set_bit(PDSC_S_FW_DEAD, &pdsc->state)) {
+		dev_err(pdsc->dev, "%s: already happening\n", __func__);
+		return;
+	}
+
+	/* Notify clients of fw_down */
+	if (pdsc->fw_reporter)
+		devlink_health_report(pdsc->fw_reporter, "FW down reported", pdsc);
+	pdsc_notify(PDS_EVENT_RESET, &reset_event);
+
+	pdsc_stop(pdsc);
+	pdsc_teardown(pdsc, PDSC_TEARDOWN_RECOVERY);
+}
+
+static void pdsc_fw_up(struct pdsc *pdsc)
+{
+	union pds_core_notifyq_comp reset_event = {
+		.reset.ecode = cpu_to_le16(PDS_EVENT_RESET),
+		.reset.state = 1,
+	};
+	int err;
+
+	if (!test_bit(PDSC_S_FW_DEAD, &pdsc->state)) {
+		dev_err(pdsc->dev, "%s: fw not dead\n", __func__);
+		return;
+	}
+
+	err = pdsc_setup(pdsc, PDSC_SETUP_RECOVERY);
+	if (err)
+		goto err_out;
+
+	err = pdsc_start(pdsc);
+	if (err)
+		goto err_out;
+
+	/* Notify clients of fw_up */
+	pdsc->fw_recoveries++;
+	if (pdsc->fw_reporter)
+		devlink_health_reporter_state_update(pdsc->fw_reporter,
+						     DEVLINK_HEALTH_REPORTER_STATE_HEALTHY);
+	pdsc_notify(PDS_EVENT_RESET, &reset_event);
+
+	return;
+
+err_out:
+	pdsc_teardown(pdsc, PDSC_TEARDOWN_RECOVERY);
+}
+
+void pdsc_health_thread(struct work_struct *work)
+{
+	struct pdsc *pdsc = container_of(work, struct pdsc, health_work);
+	unsigned long mask;
+	bool healthy;
+
+	mutex_lock(&pdsc->config_lock);
+
+	/* Don't do a check when in a transition state */
+	mask = BIT_ULL(PDSC_S_INITING_DRIVER) |
+	       BIT_ULL(PDSC_S_STOPPING_DRIVER);
+	if (pdsc->state & mask)
+		goto out_unlock;
+
+	healthy = pdsc_is_fw_good(pdsc);
+	dev_dbg(pdsc->dev, "%s: health %d fw_status %#02x fw_heartbeat %d\n",
+		__func__, healthy, pdsc->fw_status, pdsc->last_hb);
+
+	if (test_bit(PDSC_S_FW_DEAD, &pdsc->state)) {
+		if (healthy)
+			pdsc_fw_up(pdsc);
+	} else {
+		if (!healthy)
+			pdsc_fw_down(pdsc);
+	}
+
+	pdsc->fw_generation = pdsc->fw_status & PDS_CORE_FW_STS_F_GENERATION;
+
+out_unlock:
+	mutex_unlock(&pdsc->config_lock);
+}
diff --git a/drivers/net/ethernet/amd/pds_core/core.h b/drivers/net/ethernet/amd/pds_core/core.h
new file mode 100644
index 0000000000..b1c1f1007b
--- /dev/null
+++ b/drivers/net/ethernet/amd/pds_core/core.h
@@ -0,0 +1,312 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright(c) 2023 Advanced Micro Devices, Inc */
+
+#ifndef _PDSC_H_
+#define _PDSC_H_
+
+#include <linux/debugfs.h>
+#include <net/devlink.h>
+
+#include <linux/pds/pds_common.h>
+#include <linux/pds/pds_core_if.h>
+#include <linux/pds/pds_adminq.h>
+#include <linux/pds/pds_intr.h>
+
+#define PDSC_DRV_DESCRIPTION	"AMD/Pensando Core Driver"
+
+#define PDSC_WATCHDOG_SECS	5
+#define PDSC_QUEUE_NAME_MAX_SZ  16
+#define PDSC_ADMINQ_MIN_LENGTH	16	/* must be a power of two */
+#define PDSC_NOTIFYQ_LENGTH	64	/* must be a power of two */
+#define PDSC_TEARDOWN_RECOVERY	false
+#define PDSC_TEARDOWN_REMOVING	true
+#define PDSC_SETUP_RECOVERY	false
+#define PDSC_SETUP_INIT		true
+
+struct pdsc_dev_bar {
+	void __iomem *vaddr;
+	phys_addr_t bus_addr;
+	unsigned long len;
+	int res_index;
+};
+
+struct pdsc;
+
+struct pdsc_vf {
+	struct pds_auxiliary_dev *padev;
+	struct pdsc *vf;
+	u16     index;
+	__le16  vif_types[PDS_DEV_TYPE_MAX];
+};
+
+struct pdsc_devinfo {
+	u8 asic_type;
+	u8 asic_rev;
+	char fw_version[PDS_CORE_DEVINFO_FWVERS_BUFLEN + 1];
+	char serial_num[PDS_CORE_DEVINFO_SERIAL_BUFLEN + 1];
+};
+
+struct pdsc_queue {
+	struct pdsc_q_info *info;
+	u64 dbval;
+	u16 head_idx;
+	u16 tail_idx;
+	u8 hw_type;
+	unsigned int index;
+	unsigned int num_descs;
+	u64 dbell_count;
+	u64 features;
+	unsigned int type;
+	unsigned int hw_index;
+	union {
+		void *base;
+		struct pds_core_admin_cmd *adminq;
+	};
+	dma_addr_t base_pa;	/* must be page aligned */
+	unsigned int desc_size;
+	unsigned int pid;
+	char name[PDSC_QUEUE_NAME_MAX_SZ];
+};
+
+#define PDSC_INTR_NAME_MAX_SZ		32
+
+struct pdsc_intr_info {
+	char name[PDSC_INTR_NAME_MAX_SZ];
+	unsigned int index;
+	unsigned int vector;
+	void *data;
+};
+
+struct pdsc_cq_info {
+	void *comp;
+};
+
+struct pdsc_buf_info {
+	struct page *page;
+	dma_addr_t dma_addr;
+	u32 page_offset;
+	u32 len;
+};
+
+struct pdsc_q_info {
+	union {
+		void *desc;
+		struct pdsc_admin_cmd *adminq_desc;
+	};
+	unsigned int bytes;
+	unsigned int nbufs;
+	struct pdsc_buf_info bufs[PDS_CORE_MAX_FRAGS];
+	struct pdsc_wait_context *wc;
+	void *dest;
+};
+
+struct pdsc_cq {
+	struct pdsc_cq_info *info;
+	struct pdsc_queue *bound_q;
+	struct pdsc_intr_info *bound_intr;
+	u16 tail_idx;
+	bool done_color;
+	unsigned int num_descs;
+	unsigned int desc_size;
+	void *base;
+	dma_addr_t base_pa;	/* must be page aligned */
+} ____cacheline_aligned_in_smp;
+
+struct pdsc_qcq {
+	struct pdsc *pdsc;
+	void *q_base;
+	dma_addr_t q_base_pa;	/* might not be page aligned */
+	void *cq_base;
+	dma_addr_t cq_base_pa;	/* might not be page aligned */
+	u32 q_size;
+	u32 cq_size;
+	bool armed;
+	unsigned int flags;
+
+	struct work_struct work;
+	struct pdsc_queue q;
+	struct pdsc_cq cq;
+	int intx;
+
+	u32 accum_work;
+	struct dentry *dentry;
+};
+
+struct pdsc_viftype {
+	char *name;
+	bool supported;
+	bool enabled;
+	int dl_id;
+	int vif_id;
+	struct pds_auxiliary_dev *padev;
+};
+
+/* No state flags set means we are in a steady running state */
+enum pdsc_state_flags {
+	PDSC_S_FW_DEAD,		    /* stopped, wait on startup or recovery */
+	PDSC_S_INITING_DRIVER,	    /* initial startup from probe */
+	PDSC_S_STOPPING_DRIVER,	    /* driver remove */
+
+	/* leave this as last */
+	PDSC_S_STATE_SIZE
+};
+
+struct pdsc {
+	struct pci_dev *pdev;
+	struct dentry *dentry;
+	struct device *dev;
+	struct pdsc_dev_bar bars[PDS_CORE_BARS_MAX];
+	struct pdsc_vf *vfs;
+	int num_vfs;
+	int vf_id;
+	int hw_index;
+	int uid;
+
+	unsigned long state;
+	u8 fw_status;
+	u8 fw_generation;
+	unsigned long last_fw_time;
+	u32 last_hb;
+	struct timer_list wdtimer;
+	unsigned int wdtimer_period;
+	struct work_struct health_work;
+	struct devlink_health_reporter *fw_reporter;
+	u32 fw_recoveries;
+
+	struct pdsc_devinfo dev_info;
+	struct pds_core_dev_identity dev_ident;
+	unsigned int nintrs;
+	struct pdsc_intr_info *intr_info;	/* array of nintrs elements */
+
+	struct workqueue_struct *wq;
+
+	unsigned int devcmd_timeout;
+	struct mutex devcmd_lock;	/* lock for dev_cmd operations */
+	struct mutex config_lock;	/* lock for configuration operations */
+	spinlock_t adminq_lock;		/* lock for adminq operations */
+	struct pds_core_dev_info_regs __iomem *info_regs;
+	struct pds_core_dev_cmd_regs __iomem *cmd_regs;
+	struct pds_core_intr __iomem *intr_ctrl;
+	u64 __iomem *intr_status;
+	u64 __iomem *db_pages;
+	dma_addr_t phy_db_pages;
+	u64 __iomem *kern_dbpage;
+
+	struct pdsc_qcq adminqcq;
+	struct pdsc_qcq notifyqcq;
+	u64 last_eid;
+	struct pdsc_viftype *viftype_status;
+};
+
+/** enum pds_core_dbell_bits - bitwise composition of dbell values.
+ *
+ * @PDS_CORE_DBELL_QID_MASK:	unshifted mask of valid queue id bits.
+ * @PDS_CORE_DBELL_QID_SHIFT:	queue id shift amount in dbell value.
+ * @PDS_CORE_DBELL_QID:		macro to build QID component of dbell value.
+ *
+ * @PDS_CORE_DBELL_RING_MASK:	unshifted mask of valid ring bits.
+ * @PDS_CORE_DBELL_RING_SHIFT:	ring shift amount in dbell value.
+ * @PDS_CORE_DBELL_RING:	macro to build ring component of dbell value.
+ *
+ * @PDS_CORE_DBELL_RING_0:	ring zero dbell component value.
+ * @PDS_CORE_DBELL_RING_1:	ring one dbell component value.
+ * @PDS_CORE_DBELL_RING_2:	ring two dbell component value.
+ * @PDS_CORE_DBELL_RING_3:	ring three dbell component value.
+ *
+ * @PDS_CORE_DBELL_INDEX_MASK:	bit mask of valid index bits, no shift needed.
+ */
+enum pds_core_dbell_bits {
+	PDS_CORE_DBELL_QID_MASK		= 0xffffff,
+	PDS_CORE_DBELL_QID_SHIFT		= 24,
+
+#define PDS_CORE_DBELL_QID(n) \
+	(((u64)(n) & PDS_CORE_DBELL_QID_MASK) << PDS_CORE_DBELL_QID_SHIFT)
+
+	PDS_CORE_DBELL_RING_MASK		= 0x7,
+	PDS_CORE_DBELL_RING_SHIFT		= 16,
+
+#define PDS_CORE_DBELL_RING(n) \
+	(((u64)(n) & PDS_CORE_DBELL_RING_MASK) << PDS_CORE_DBELL_RING_SHIFT)
+
+	PDS_CORE_DBELL_RING_0		= 0,
+	PDS_CORE_DBELL_RING_1		= PDS_CORE_DBELL_RING(1),
+	PDS_CORE_DBELL_RING_2		= PDS_CORE_DBELL_RING(2),
+	PDS_CORE_DBELL_RING_3		= PDS_CORE_DBELL_RING(3),
+
+	PDS_CORE_DBELL_INDEX_MASK		= 0xffff,
+};
+
+static inline void pds_core_dbell_ring(u64 __iomem *db_page,
+				       enum pds_core_logical_qtype qtype,
+				       u64 val)
+{
+	writeq(val, &db_page[qtype]);
+}
+
+int pdsc_fw_reporter_diagnose(struct devlink_health_reporter *reporter,
+			      struct devlink_fmsg *fmsg,
+			      struct netlink_ext_ack *extack);
+int pdsc_dl_info_get(struct devlink *dl, struct devlink_info_req *req,
+		     struct netlink_ext_ack *extack);
+int pdsc_dl_flash_update(struct devlink *dl,
+			 struct devlink_flash_update_params *params,
+			 struct netlink_ext_ack *extack);
+int pdsc_dl_enable_get(struct devlink *dl, u32 id,
+		       struct devlink_param_gset_ctx *ctx);
+int pdsc_dl_enable_set(struct devlink *dl, u32 id,
+		       struct devlink_param_gset_ctx *ctx);
+int pdsc_dl_enable_validate(struct devlink *dl, u32 id,
+			    union devlink_param_value val,
+			    struct netlink_ext_ack *extack);
+
+void __iomem *pdsc_map_dbpage(struct pdsc *pdsc, int page_num);
+
+void pdsc_debugfs_create(void);
+void pdsc_debugfs_destroy(void);
+void pdsc_debugfs_add_dev(struct pdsc *pdsc);
+void pdsc_debugfs_del_dev(struct pdsc *pdsc);
+void pdsc_debugfs_add_ident(struct pdsc *pdsc);
+void pdsc_debugfs_add_viftype(struct pdsc *pdsc);
+void pdsc_debugfs_add_irqs(struct pdsc *pdsc);
+void pdsc_debugfs_add_qcq(struct pdsc *pdsc, struct pdsc_qcq *qcq);
+void pdsc_debugfs_del_qcq(struct pdsc_qcq *qcq);
+
+int pdsc_err_to_errno(enum pds_core_status_code code);
+bool pdsc_is_fw_running(struct pdsc *pdsc);
+bool pdsc_is_fw_good(struct pdsc *pdsc);
+int pdsc_devcmd(struct pdsc *pdsc, union pds_core_dev_cmd *cmd,
+		union pds_core_dev_comp *comp, int max_seconds);
+int pdsc_devcmd_locked(struct pdsc *pdsc, union pds_core_dev_cmd *cmd,
+		       union pds_core_dev_comp *comp, int max_seconds);
+int pdsc_devcmd_init(struct pdsc *pdsc);
+int pdsc_devcmd_reset(struct pdsc *pdsc);
+int pdsc_dev_reinit(struct pdsc *pdsc);
+int pdsc_dev_init(struct pdsc *pdsc);
+
+int pdsc_intr_alloc(struct pdsc *pdsc, char *name,
+		    irq_handler_t handler, void *data);
+void pdsc_intr_free(struct pdsc *pdsc, int index);
+void pdsc_qcq_free(struct pdsc *pdsc, struct pdsc_qcq *qcq);
+int pdsc_qcq_alloc(struct pdsc *pdsc, unsigned int type, unsigned int index,
+		   const char *name, unsigned int flags, unsigned int num_descs,
+		   unsigned int desc_size, unsigned int cq_desc_size,
+		   unsigned int pid, struct pdsc_qcq *qcq);
+int pdsc_setup(struct pdsc *pdsc, bool init);
+void pdsc_teardown(struct pdsc *pdsc, bool removing);
+int pdsc_start(struct pdsc *pdsc);
+void pdsc_stop(struct pdsc *pdsc);
+void pdsc_health_thread(struct work_struct *work);
+
+int pdsc_register_notify(struct notifier_block *nb);
+void pdsc_unregister_notify(struct notifier_block *nb);
+void pdsc_notify(unsigned long event, void *data);
+int pdsc_auxbus_dev_add(struct pdsc *cf, struct pdsc *pf);
+int pdsc_auxbus_dev_del(struct pdsc *cf, struct pdsc *pf);
+
+void pdsc_process_adminq(struct pdsc_qcq *qcq);
+void pdsc_work_thread(struct work_struct *work);
+irqreturn_t pdsc_adminq_isr(int irq, void *data);
+
+int pdsc_firmware_update(struct pdsc *pdsc, const struct firmware *fw,
+			 struct netlink_ext_ack *extack);
+#endif /* _PDSC_H_ */
diff --git a/drivers/net/ethernet/amd/pds_core/debugfs.c b/drivers/net/ethernet/amd/pds_core/debugfs.c
new file mode 100644
index 0000000000..8ec392299b
--- /dev/null
+++ b/drivers/net/ethernet/amd/pds_core/debugfs.c
@@ -0,0 +1,170 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright(c) 2023 Advanced Micro Devices, Inc */
+
+#include <linux/pci.h>
+
+#include "core.h"
+
+static struct dentry *pdsc_dir;
+
+void pdsc_debugfs_create(void)
+{
+	pdsc_dir = debugfs_create_dir(PDS_CORE_DRV_NAME, NULL);
+}
+
+void pdsc_debugfs_destroy(void)
+{
+	debugfs_remove_recursive(pdsc_dir);
+}
+
+void pdsc_debugfs_add_dev(struct pdsc *pdsc)
+{
+	pdsc->dentry = debugfs_create_dir(pci_name(pdsc->pdev), pdsc_dir);
+
+	debugfs_create_ulong("state", 0400, pdsc->dentry, &pdsc->state);
+}
+
+void pdsc_debugfs_del_dev(struct pdsc *pdsc)
+{
+	debugfs_remove_recursive(pdsc->dentry);
+	pdsc->dentry = NULL;
+}
+
+static int identity_show(struct seq_file *seq, void *v)
+{
+	struct pdsc *pdsc = seq->private;
+	struct pds_core_dev_identity *ident;
+	int vt;
+
+	ident = &pdsc->dev_ident;
+
+	seq_printf(seq, "fw_heartbeat:     0x%x\n",
+		   ioread32(&pdsc->info_regs->fw_heartbeat));
+
+	seq_printf(seq, "nlifs:            %d\n",
+		   le32_to_cpu(ident->nlifs));
+	seq_printf(seq, "nintrs:           %d\n",
+		   le32_to_cpu(ident->nintrs));
+	seq_printf(seq, "ndbpgs_per_lif:   %d\n",
+		   le32_to_cpu(ident->ndbpgs_per_lif));
+	seq_printf(seq, "intr_coal_mult:   %d\n",
+		   le32_to_cpu(ident->intr_coal_mult));
+	seq_printf(seq, "intr_coal_div:    %d\n",
+		   le32_to_cpu(ident->intr_coal_div));
+
+	seq_puts(seq, "vif_types:        ");
+	for (vt = 0; vt < PDS_DEV_TYPE_MAX; vt++)
+		seq_printf(seq, "%d ",
+			   le16_to_cpu(pdsc->dev_ident.vif_types[vt]));
+	seq_puts(seq, "\n");
+
+	return 0;
+}
+DEFINE_SHOW_ATTRIBUTE(identity);
+
+void pdsc_debugfs_add_ident(struct pdsc *pdsc)
+{
+	debugfs_create_file("identity", 0400, pdsc->dentry,
+			    pdsc, &identity_fops);
+}
+
+static int viftype_show(struct seq_file *seq, void *v)
+{
+	struct pdsc *pdsc = seq->private;
+	int vt;
+
+	for (vt = 0; vt < PDS_DEV_TYPE_MAX; vt++) {
+		if (!pdsc->viftype_status[vt].name)
+			continue;
+
+		seq_printf(seq, "%s\t%d supported %d enabled\n",
+			   pdsc->viftype_status[vt].name,
+			   pdsc->viftype_status[vt].supported,
+			   pdsc->viftype_status[vt].enabled);
+	}
+	return 0;
+}
+DEFINE_SHOW_ATTRIBUTE(viftype);
+
+void pdsc_debugfs_add_viftype(struct pdsc *pdsc)
+{
+	debugfs_create_file("viftypes", 0400, pdsc->dentry,
+			    pdsc, &viftype_fops);
+}
+
+static const struct debugfs_reg32 intr_ctrl_regs[] = {
+	{ .name = "coal_init", .offset = 0, },
+	{ .name = "mask", .offset = 4, },
+	{ .name = "credits", .offset = 8, },
+	{ .name = "mask_on_assert", .offset = 12, },
+	{ .name = "coal_timer", .offset = 16, },
+};
+
+void pdsc_debugfs_add_qcq(struct pdsc *pdsc, struct pdsc_qcq *qcq)
+{
+	struct dentry *qcq_dentry, *q_dentry, *cq_dentry;
+	struct dentry *intr_dentry;
+	struct debugfs_regset32 *intr_ctrl_regset;
+	struct pdsc_intr_info *intr = &pdsc->intr_info[qcq->intx];
+	struct pdsc_queue *q = &qcq->q;
+	struct pdsc_cq *cq = &qcq->cq;
+
+	qcq_dentry = debugfs_create_dir(q->name, pdsc->dentry);
+	if (IS_ERR_OR_NULL(qcq_dentry))
+		return;
+	qcq->dentry = qcq_dentry;
+
+	debugfs_create_x64("q_base_pa", 0400, qcq_dentry, &qcq->q_base_pa);
+	debugfs_create_x32("q_size", 0400, qcq_dentry, &qcq->q_size);
+	debugfs_create_x64("cq_base_pa", 0400, qcq_dentry, &qcq->cq_base_pa);
+	debugfs_create_x32("cq_size", 0400, qcq_dentry, &qcq->cq_size);
+	debugfs_create_x32("accum_work", 0400, qcq_dentry, &qcq->accum_work);
+
+	q_dentry = debugfs_create_dir("q", qcq->dentry);
+	if (IS_ERR_OR_NULL(q_dentry))
+		return;
+
+	debugfs_create_u32("index", 0400, q_dentry, &q->index);
+	debugfs_create_u32("num_descs", 0400, q_dentry, &q->num_descs);
+	debugfs_create_u32("desc_size", 0400, q_dentry, &q->desc_size);
+	debugfs_create_u32("pid", 0400, q_dentry, &q->pid);
+
+	debugfs_create_u16("tail", 0400, q_dentry, &q->tail_idx);
+	debugfs_create_u16("head", 0400, q_dentry, &q->head_idx);
+
+	cq_dentry = debugfs_create_dir("cq", qcq->dentry);
+	if (IS_ERR_OR_NULL(cq_dentry))
+		return;
+
+	debugfs_create_x64("base_pa", 0400, cq_dentry, &cq->base_pa);
+	debugfs_create_u32("num_descs", 0400, cq_dentry, &cq->num_descs);
+	debugfs_create_u32("desc_size", 0400, cq_dentry, &cq->desc_size);
+	debugfs_create_bool("done_color", 0400, cq_dentry, &cq->done_color);
+	debugfs_create_u16("tail", 0400, cq_dentry, &cq->tail_idx);
+
+	if (qcq->flags & PDS_CORE_QCQ_F_INTR) {
+		intr_dentry = debugfs_create_dir("intr", qcq->dentry);
+		if (IS_ERR_OR_NULL(intr_dentry))
+			return;
+
+		debugfs_create_u32("index", 0400, intr_dentry, &intr->index);
+		debugfs_create_u32("vector", 0400, intr_dentry, &intr->vector);
+
+		intr_ctrl_regset = kzalloc(sizeof(*intr_ctrl_regset),
+					   GFP_KERNEL);
+		if (!intr_ctrl_regset)
+			return;
+		intr_ctrl_regset->regs = intr_ctrl_regs;
+		intr_ctrl_regset->nregs = ARRAY_SIZE(intr_ctrl_regs);
+		intr_ctrl_regset->base = &pdsc->intr_ctrl[intr->index];
+
+		debugfs_create_regset32("intr_ctrl", 0400, intr_dentry,
+					intr_ctrl_regset);
+	}
+};
+
+void pdsc_debugfs_del_qcq(struct pdsc_qcq *qcq)
+{
+	debugfs_remove_recursive(qcq->dentry);
+	qcq->dentry = NULL;
+}
diff --git a/drivers/net/ethernet/amd/pds_core/dev.c b/drivers/net/ethernet/amd/pds_core/dev.c
new file mode 100644
index 0000000000..eb178728ed
--- /dev/null
+++ b/drivers/net/ethernet/amd/pds_core/dev.c
@@ -0,0 +1,358 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright(c) 2023 Advanced Micro Devices, Inc */
+
+#include <linux/errno.h>
+#include <linux/pci.h>
+#include <linux/utsname.h>
+
+#include "core.h"
+
+int pdsc_err_to_errno(enum pds_core_status_code code)
+{
+	switch (code) {
+	case PDS_RC_SUCCESS:
+		return 0;
+	case PDS_RC_EVERSION:
+	case PDS_RC_EQTYPE:
+	case PDS_RC_EQID:
+	case PDS_RC_EINVAL:
+	case PDS_RC_ENOSUPP:
+		return -EINVAL;
+	case PDS_RC_EPERM:
+		return -EPERM;
+	case PDS_RC_ENOENT:
+		return -ENOENT;
+	case PDS_RC_EAGAIN:
+		return -EAGAIN;
+	case PDS_RC_ENOMEM:
+		return -ENOMEM;
+	case PDS_RC_EFAULT:
+		return -EFAULT;
+	case PDS_RC_EBUSY:
+		return -EBUSY;
+	case PDS_RC_EEXIST:
+		return -EEXIST;
+	case PDS_RC_EVFID:
+		return -ENODEV;
+	case PDS_RC_ECLIENT:
+		return -ECHILD;
+	case PDS_RC_ENOSPC:
+		return -ENOSPC;
+	case PDS_RC_ERANGE:
+		return -ERANGE;
+	case PDS_RC_BAD_ADDR:
+		return -EFAULT;
+	case PDS_RC_EOPCODE:
+	case PDS_RC_EINTR:
+	case PDS_RC_DEV_CMD:
+	case PDS_RC_ERROR:
+	case PDS_RC_ERDMA:
+	case PDS_RC_EIO:
+	default:
+		return -EIO;
+	}
+}
+
+bool pdsc_is_fw_running(struct pdsc *pdsc)
+{
+	pdsc->fw_status = ioread8(&pdsc->info_regs->fw_status);
+	pdsc->last_fw_time = jiffies;
+	pdsc->last_hb = ioread32(&pdsc->info_regs->fw_heartbeat);
+
+	/* Firmware is useful only if the running bit is set and
+	 * fw_status != 0xff (bad PCI read)
+	 */
+	return (pdsc->fw_status != 0xff) &&
+		(pdsc->fw_status & PDS_CORE_FW_STS_F_RUNNING);
+}
+
+bool pdsc_is_fw_good(struct pdsc *pdsc)
+{
+	bool fw_running = pdsc_is_fw_running(pdsc);
+	u8 gen;
+
+	/* Make sure to update the cached fw_status by calling
+	 * pdsc_is_fw_running() before getting the generation
+	 */
+	gen = pdsc->fw_status & PDS_CORE_FW_STS_F_GENERATION;
+
+	return fw_running && gen == pdsc->fw_generation;
+}
+
+static u8 pdsc_devcmd_status(struct pdsc *pdsc)
+{
+	return ioread8(&pdsc->cmd_regs->comp.status);
+}
+
+static bool pdsc_devcmd_done(struct pdsc *pdsc)
+{
+	return ioread32(&pdsc->cmd_regs->done) & PDS_CORE_DEV_CMD_DONE;
+}
+
+static void pdsc_devcmd_dbell(struct pdsc *pdsc)
+{
+	iowrite32(0, &pdsc->cmd_regs->done);
+	iowrite32(1, &pdsc->cmd_regs->doorbell);
+}
+
+static void pdsc_devcmd_clean(struct pdsc *pdsc)
+{
+	iowrite32(0, &pdsc->cmd_regs->doorbell);
+	memset_io(&pdsc->cmd_regs->cmd, 0, sizeof(pdsc->cmd_regs->cmd));
+}
+
+static const char *pdsc_devcmd_str(int opcode)
+{
+	switch (opcode) {
+	case PDS_CORE_CMD_NOP:
+		return "PDS_CORE_CMD_NOP";
+	case PDS_CORE_CMD_IDENTIFY:
+		return "PDS_CORE_CMD_IDENTIFY";
+	case PDS_CORE_CMD_RESET:
+		return "PDS_CORE_CMD_RESET";
+	case PDS_CORE_CMD_INIT:
+		return "PDS_CORE_CMD_INIT";
+	case PDS_CORE_CMD_FW_DOWNLOAD:
+		return "PDS_CORE_CMD_FW_DOWNLOAD";
+	case PDS_CORE_CMD_FW_CONTROL:
+		return "PDS_CORE_CMD_FW_CONTROL";
+	default:
+		return "PDS_CORE_CMD_UNKNOWN";
+	}
+}
+
+static int pdsc_devcmd_wait(struct pdsc *pdsc, u8 opcode, int max_seconds)
+{
+	struct device *dev = pdsc->dev;
+	unsigned long start_time;
+	unsigned long max_wait;
+	unsigned long duration;
+	int timeout = 0;
+	int done = 0;
+	int err = 0;
+	int status;
+
+	start_time = jiffies;
+	max_wait = start_time + (max_seconds * HZ);
+
+	while (!done && !timeout) {
+		done = pdsc_devcmd_done(pdsc);
+		if (done)
+			break;
+
+		timeout = time_after(jiffies, max_wait);
+		if (timeout)
+			break;
+
+		usleep_range(100, 200);
+	}
+	duration = jiffies - start_time;
+
+	if (done && duration > HZ)
+		dev_dbg(dev, "DEVCMD %d %s after %ld secs\n",
+			opcode, pdsc_devcmd_str(opcode), duration / HZ);
+
+	if (!done || timeout) {
+		dev_err(dev, "DEVCMD %d %s timeout, done %d timeout %d max_seconds=%d\n",
+			opcode, pdsc_devcmd_str(opcode), done, timeout,
+			max_seconds);
+		err = -ETIMEDOUT;
+		pdsc_devcmd_clean(pdsc);
+	}
+
+	status = pdsc_devcmd_status(pdsc);
+	err = pdsc_err_to_errno(status);
+	if (err && err != -EAGAIN)
+		dev_err(dev, "DEVCMD %d %s failed, status=%d err %d %pe\n",
+			opcode, pdsc_devcmd_str(opcode), status, err,
+			ERR_PTR(err));
+
+	return err;
+}
+
+int pdsc_devcmd_locked(struct pdsc *pdsc, union pds_core_dev_cmd *cmd,
+		       union pds_core_dev_comp *comp, int max_seconds)
+{
+	int err;
+
+	memcpy_toio(&pdsc->cmd_regs->cmd, cmd, sizeof(*cmd));
+	pdsc_devcmd_dbell(pdsc);
+	err = pdsc_devcmd_wait(pdsc, cmd->opcode, max_seconds);
+	memcpy_fromio(comp, &pdsc->cmd_regs->comp, sizeof(*comp));
+
+	if ((err == -ENXIO || err == -ETIMEDOUT) && pdsc->wq)
+		queue_work(pdsc->wq, &pdsc->health_work);
+
+	return err;
+}
+
+int pdsc_devcmd(struct pdsc *pdsc, union pds_core_dev_cmd *cmd,
+		union pds_core_dev_comp *comp, int max_seconds)
+{
+	int err;
+
+	mutex_lock(&pdsc->devcmd_lock);
+	err = pdsc_devcmd_locked(pdsc, cmd, comp, max_seconds);
+	mutex_unlock(&pdsc->devcmd_lock);
+
+	return err;
+}
+
+int pdsc_devcmd_init(struct pdsc *pdsc)
+{
+	union pds_core_dev_comp comp = {};
+	union pds_core_dev_cmd cmd = {
+		.opcode = PDS_CORE_CMD_INIT,
+	};
+
+	return pdsc_devcmd(pdsc, &cmd, &comp, pdsc->devcmd_timeout);
+}
+
+int pdsc_devcmd_reset(struct pdsc *pdsc)
+{
+	union pds_core_dev_comp comp = {};
+	union pds_core_dev_cmd cmd = {
+		.reset.opcode = PDS_CORE_CMD_RESET,
+	};
+
+	return pdsc_devcmd(pdsc, &cmd, &comp, pdsc->devcmd_timeout);
+}
+
+static int pdsc_devcmd_identify_locked(struct pdsc *pdsc)
+{
+	union pds_core_dev_comp comp = {};
+	union pds_core_dev_cmd cmd = {
+		.identify.opcode = PDS_CORE_CMD_IDENTIFY,
+		.identify.ver = PDS_CORE_IDENTITY_VERSION_1,
+	};
+
+	return pdsc_devcmd_locked(pdsc, &cmd, &comp, pdsc->devcmd_timeout);
+}
+
+static void pdsc_init_devinfo(struct pdsc *pdsc)
+{
+	pdsc->dev_info.asic_type = ioread8(&pdsc->info_regs->asic_type);
+	pdsc->dev_info.asic_rev = ioread8(&pdsc->info_regs->asic_rev);
+	pdsc->fw_generation = PDS_CORE_FW_STS_F_GENERATION &
+			      ioread8(&pdsc->info_regs->fw_status);
+
+	memcpy_fromio(pdsc->dev_info.fw_version,
+		      pdsc->info_regs->fw_version,
+		      PDS_CORE_DEVINFO_FWVERS_BUFLEN);
+	pdsc->dev_info.fw_version[PDS_CORE_DEVINFO_FWVERS_BUFLEN] = 0;
+
+	memcpy_fromio(pdsc->dev_info.serial_num,
+		      pdsc->info_regs->serial_num,
+		      PDS_CORE_DEVINFO_SERIAL_BUFLEN);
+	pdsc->dev_info.serial_num[PDS_CORE_DEVINFO_SERIAL_BUFLEN] = 0;
+
+	dev_dbg(pdsc->dev, "fw_version %s\n", pdsc->dev_info.fw_version);
+}
+
+static int pdsc_identify(struct pdsc *pdsc)
+{
+	struct pds_core_drv_identity drv = {};
+	size_t sz;
+	int err;
+	int n;
+
+	drv.drv_type = cpu_to_le32(PDS_DRIVER_LINUX);
+	/* Catching the return quiets a Wformat-truncation complaint */
+	n = snprintf(drv.driver_ver_str, sizeof(drv.driver_ver_str),
+		     "%s %s", PDS_CORE_DRV_NAME, utsname()->release);
+	if (n > sizeof(drv.driver_ver_str))
+		dev_dbg(pdsc->dev, "release name truncated, don't care\n");
+
+	/* Next let's get some info about the device
+	 * We use the devcmd_lock at this level in order to
+	 * get safe access to the cmd_regs->data before anyone
+	 * else can mess it up
+	 */
+	mutex_lock(&pdsc->devcmd_lock);
+
+	sz = min_t(size_t, sizeof(drv), sizeof(pdsc->cmd_regs->data));
+	memcpy_toio(&pdsc->cmd_regs->data, &drv, sz);
+
+	err = pdsc_devcmd_identify_locked(pdsc);
+	if (!err) {
+		sz = min_t(size_t, sizeof(pdsc->dev_ident),
+			   sizeof(pdsc->cmd_regs->data));
+		memcpy_fromio(&pdsc->dev_ident, &pdsc->cmd_regs->data, sz);
+	}
+	mutex_unlock(&pdsc->devcmd_lock);
+
+	if (err) {
+		dev_err(pdsc->dev, "Cannot identify device: %pe\n",
+			ERR_PTR(err));
+		return err;
+	}
+
+	if (isprint(pdsc->dev_info.fw_version[0]) &&
+	    isascii(pdsc->dev_info.fw_version[0]))
+		dev_info(pdsc->dev, "FW: %.*s\n",
+			 (int)(sizeof(pdsc->dev_info.fw_version) - 1),
+			 pdsc->dev_info.fw_version);
+	else
+		dev_info(pdsc->dev, "FW: (invalid string) 0x%02x 0x%02x 0x%02x 0x%02x ...\n",
+			 (u8)pdsc->dev_info.fw_version[0],
+			 (u8)pdsc->dev_info.fw_version[1],
+			 (u8)pdsc->dev_info.fw_version[2],
+			 (u8)pdsc->dev_info.fw_version[3]);
+
+	return 0;
+}
+
+int pdsc_dev_reinit(struct pdsc *pdsc)
+{
+	pdsc_init_devinfo(pdsc);
+
+	return pdsc_identify(pdsc);
+}
+
+int pdsc_dev_init(struct pdsc *pdsc)
+{
+	unsigned int nintrs;
+	int err;
+
+	/* Initial init and reset of device */
+	pdsc_init_devinfo(pdsc);
+	pdsc->devcmd_timeout = PDS_CORE_DEVCMD_TIMEOUT;
+
+	err = pdsc_devcmd_reset(pdsc);
+	if (err)
+		return err;
+
+	err = pdsc_identify(pdsc);
+	if (err)
+		return err;
+
+	pdsc_debugfs_add_ident(pdsc);
+
+	/* Now we can reserve interrupts */
+	nintrs = le32_to_cpu(pdsc->dev_ident.nintrs);
+	nintrs = min_t(unsigned int, num_online_cpus(), nintrs);
+
+	/* Get intr_info struct array for tracking */
+	pdsc->intr_info = kcalloc(nintrs, sizeof(*pdsc->intr_info), GFP_KERNEL);
+	if (!pdsc->intr_info) {
+		err = -ENOMEM;
+		goto err_out;
+	}
+
+	err = pci_alloc_irq_vectors(pdsc->pdev, nintrs, nintrs, PCI_IRQ_MSIX);
+	if (err != nintrs) {
+		dev_err(pdsc->dev, "Can't get %d intrs from OS: %pe\n",
+			nintrs, ERR_PTR(err));
+		err = -ENOSPC;
+		goto err_out;
+	}
+	pdsc->nintrs = nintrs;
+
+	return 0;
+
+err_out:
+	kfree(pdsc->intr_info);
+	pdsc->intr_info = NULL;
+
+	return err;
+}
diff --git a/drivers/net/ethernet/amd/pds_core/devlink.c b/drivers/net/ethernet/amd/pds_core/devlink.c
new file mode 100644
index 0000000000..d2abf32b93
--- /dev/null
+++ b/drivers/net/ethernet/amd/pds_core/devlink.c
@@ -0,0 +1,186 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright(c) 2023 Advanced Micro Devices, Inc */
+
+#include "core.h"
+#include <linux/pds/pds_auxbus.h>
+
+static struct
+pdsc_viftype *pdsc_dl_find_viftype_by_id(struct pdsc *pdsc,
+					 enum devlink_param_type dl_id)
+{
+	int vt;
+
+	if (!pdsc->viftype_status)
+		return NULL;
+
+	for (vt = 0; vt < PDS_DEV_TYPE_MAX; vt++) {
+		if (pdsc->viftype_status[vt].dl_id == dl_id)
+			return &pdsc->viftype_status[vt];
+	}
+
+	return NULL;
+}
+
+int pdsc_dl_enable_get(struct devlink *dl, u32 id,
+		       struct devlink_param_gset_ctx *ctx)
+{
+	struct pdsc *pdsc = devlink_priv(dl);
+	struct pdsc_viftype *vt_entry;
+
+	vt_entry = pdsc_dl_find_viftype_by_id(pdsc, id);
+	if (!vt_entry)
+		return -ENOENT;
+
+	ctx->val.vbool = vt_entry->enabled;
+
+	return 0;
+}
+
+int pdsc_dl_enable_set(struct devlink *dl, u32 id,
+		       struct devlink_param_gset_ctx *ctx)
+{
+	struct pdsc *pdsc = devlink_priv(dl);
+	struct pdsc_viftype *vt_entry;
+	int err = 0;
+	int vf_id;
+
+	vt_entry = pdsc_dl_find_viftype_by_id(pdsc, id);
+	if (!vt_entry || !vt_entry->supported)
+		return -EOPNOTSUPP;
+
+	if (vt_entry->enabled == ctx->val.vbool)
+		return 0;
+
+	vt_entry->enabled = ctx->val.vbool;
+	for (vf_id = 0; vf_id < pdsc->num_vfs; vf_id++) {
+		struct pdsc *vf = pdsc->vfs[vf_id].vf;
+
+		err = ctx->val.vbool ? pdsc_auxbus_dev_add(vf, pdsc) :
+				       pdsc_auxbus_dev_del(vf, pdsc);
+	}
+
+	return err;
+}
+
+int pdsc_dl_enable_validate(struct devlink *dl, u32 id,
+			    union devlink_param_value val,
+			    struct netlink_ext_ack *extack)
+{
+	struct pdsc *pdsc = devlink_priv(dl);
+	struct pdsc_viftype *vt_entry;
+
+	vt_entry = pdsc_dl_find_viftype_by_id(pdsc, id);
+	if (!vt_entry || !vt_entry->supported)
+		return -EOPNOTSUPP;
+
+	if (!pdsc->viftype_status[vt_entry->vif_id].supported)
+		return -ENODEV;
+
+	return 0;
+}
+
+int pdsc_dl_flash_update(struct devlink *dl,
+			 struct devlink_flash_update_params *params,
+			 struct netlink_ext_ack *extack)
+{
+	struct pdsc *pdsc = devlink_priv(dl);
+
+	return pdsc_firmware_update(pdsc, params->fw, extack);
+}
+
+static char *fw_slotnames[] = {
+	"fw.goldfw",
+	"fw.mainfwa",
+	"fw.mainfwb",
+};
+
+int pdsc_dl_info_get(struct devlink *dl, struct devlink_info_req *req,
+		     struct netlink_ext_ack *extack)
+{
+	union pds_core_dev_cmd cmd = {
+		.fw_control.opcode = PDS_CORE_CMD_FW_CONTROL,
+		.fw_control.oper = PDS_CORE_FW_GET_LIST,
+	};
+	struct pds_core_fw_list_info fw_list;
+	struct pdsc *pdsc = devlink_priv(dl);
+	union pds_core_dev_comp comp;
+	char buf[32];
+	int listlen;
+	int err;
+	int i;
+
+	mutex_lock(&pdsc->devcmd_lock);
+	err = pdsc_devcmd_locked(pdsc, &cmd, &comp, pdsc->devcmd_timeout * 2);
+	memcpy_fromio(&fw_list, pdsc->cmd_regs->data, sizeof(fw_list));
+	mutex_unlock(&pdsc->devcmd_lock);
+	if (err && err != -EIO)
+		return err;
+
+	listlen = fw_list.num_fw_slots;
+	for (i = 0; i < listlen; i++) {
+		if (i < ARRAY_SIZE(fw_slotnames))
+			strscpy(buf, fw_slotnames[i], sizeof(buf));
+		else
+			snprintf(buf, sizeof(buf), "fw.slot_%d", i);
+		err = devlink_info_version_stored_put(req, buf,
+						      fw_list.fw_names[i].fw_version);
+	}
+
+	err = devlink_info_version_running_put(req,
+					       DEVLINK_INFO_VERSION_GENERIC_FW,
+					       pdsc->dev_info.fw_version);
+	if (err)
+		return err;
+
+	snprintf(buf, sizeof(buf), "0x%x", pdsc->dev_info.asic_type);
+	err = devlink_info_version_fixed_put(req,
+					     DEVLINK_INFO_VERSION_GENERIC_ASIC_ID,
+					     buf);
+	if (err)
+		return err;
+
+	snprintf(buf, sizeof(buf), "0x%x", pdsc->dev_info.asic_rev);
+	err = devlink_info_version_fixed_put(req,
+					     DEVLINK_INFO_VERSION_GENERIC_ASIC_REV,
+					     buf);
+	if (err)
+		return err;
+
+	return devlink_info_serial_number_put(req, pdsc->dev_info.serial_num);
+}
+
+int pdsc_fw_reporter_diagnose(struct devlink_health_reporter *reporter,
+			      struct devlink_fmsg *fmsg,
+			      struct netlink_ext_ack *extack)
+{
+	struct pdsc *pdsc = devlink_health_reporter_priv(reporter);
+	int err;
+
+	mutex_lock(&pdsc->config_lock);
+
+	if (test_bit(PDSC_S_FW_DEAD, &pdsc->state))
+		err = devlink_fmsg_string_pair_put(fmsg, "Status", "dead");
+	else if (!pdsc_is_fw_good(pdsc))
+		err = devlink_fmsg_string_pair_put(fmsg, "Status", "unhealthy");
+	else
+		err = devlink_fmsg_string_pair_put(fmsg, "Status", "healthy");
+
+	mutex_unlock(&pdsc->config_lock);
+
+	if (err)
+		return err;
+
+	err = devlink_fmsg_u32_pair_put(fmsg, "State",
+					pdsc->fw_status &
+						~PDS_CORE_FW_STS_F_GENERATION);
+	if (err)
+		return err;
+
+	err = devlink_fmsg_u32_pair_put(fmsg, "Generation",
+					pdsc->fw_generation >> 4);
+	if (err)
+		return err;
+
+	return devlink_fmsg_u32_pair_put(fmsg, "Recoveries",
+					 pdsc->fw_recoveries);
+}
diff --git a/drivers/net/ethernet/amd/pds_core/fw.c b/drivers/net/ethernet/amd/pds_core/fw.c
new file mode 100644
index 0000000000..90a811f387
--- /dev/null
+++ b/drivers/net/ethernet/amd/pds_core/fw.c
@@ -0,0 +1,194 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright(c) 2023 Advanced Micro Devices, Inc */
+
+#include "core.h"
+
+/* The worst case wait for the install activity is about 25 minutes when
+ * installing a new CPLD, which is very seldom.  Normal is about 30-35
+ * seconds.  Since the driver can't tell if a CPLD update will happen we
+ * set the timeout for the ugly case.
+ */
+#define PDSC_FW_INSTALL_TIMEOUT	(25 * 60)
+#define PDSC_FW_SELECT_TIMEOUT	30
+
+/* Number of periodic log updates during fw file download */
+#define PDSC_FW_INTERVAL_FRACTION	32
+
+static int pdsc_devcmd_fw_download_locked(struct pdsc *pdsc, u64 addr,
+					  u32 offset, u32 length)
+{
+	union pds_core_dev_cmd cmd = {
+		.fw_download.opcode = PDS_CORE_CMD_FW_DOWNLOAD,
+		.fw_download.offset = cpu_to_le32(offset),
+		.fw_download.addr = cpu_to_le64(addr),
+		.fw_download.length = cpu_to_le32(length),
+	};
+	union pds_core_dev_comp comp;
+
+	return pdsc_devcmd_locked(pdsc, &cmd, &comp, pdsc->devcmd_timeout);
+}
+
+static int pdsc_devcmd_fw_install(struct pdsc *pdsc)
+{
+	union pds_core_dev_cmd cmd = {
+		.fw_control.opcode = PDS_CORE_CMD_FW_CONTROL,
+		.fw_control.oper = PDS_CORE_FW_INSTALL_ASYNC
+	};
+	union pds_core_dev_comp comp;
+	int err;
+
+	err = pdsc_devcmd(pdsc, &cmd, &comp, pdsc->devcmd_timeout);
+	if (err < 0)
+		return err;
+
+	return comp.fw_control.slot;
+}
+
+static int pdsc_devcmd_fw_activate(struct pdsc *pdsc,
+				   enum pds_core_fw_slot slot)
+{
+	union pds_core_dev_cmd cmd = {
+		.fw_control.opcode = PDS_CORE_CMD_FW_CONTROL,
+		.fw_control.oper = PDS_CORE_FW_ACTIVATE_ASYNC,
+		.fw_control.slot = slot
+	};
+	union pds_core_dev_comp comp;
+
+	return pdsc_devcmd(pdsc, &cmd, &comp, pdsc->devcmd_timeout);
+}
+
+static int pdsc_fw_status_long_wait(struct pdsc *pdsc,
+				    const char *label,
+				    unsigned long timeout,
+				    u8 fw_cmd,
+				    struct netlink_ext_ack *extack)
+{
+	union pds_core_dev_cmd cmd = {
+		.fw_control.opcode = PDS_CORE_CMD_FW_CONTROL,
+		.fw_control.oper = fw_cmd,
+	};
+	union pds_core_dev_comp comp;
+	unsigned long start_time;
+	unsigned long end_time;
+	int err;
+
+	/* Ping on the status of the long running async install
+	 * command.  We get EAGAIN while the command is still
+	 * running, else we get the final command status.
+	 */
+	start_time = jiffies;
+	end_time = start_time + (timeout * HZ);
+	do {
+		err = pdsc_devcmd(pdsc, &cmd, &comp, pdsc->devcmd_timeout);
+		msleep(20);
+	} while (time_before(jiffies, end_time) &&
+		 (err == -EAGAIN || err == -ETIMEDOUT));
+
+	if (err == -EAGAIN || err == -ETIMEDOUT) {
+		NL_SET_ERR_MSG_MOD(extack, "Firmware wait timed out");
+		dev_err(pdsc->dev, "DEV_CMD firmware wait %s timed out\n",
+			label);
+	} else if (err) {
+		NL_SET_ERR_MSG_MOD(extack, "Firmware wait failed");
+	}
+
+	return err;
+}
+
+int pdsc_firmware_update(struct pdsc *pdsc, const struct firmware *fw,
+			 struct netlink_ext_ack *extack)
+{
+	u32 buf_sz, copy_sz, offset;
+	struct devlink *dl;
+	int next_interval;
+	u64 data_addr;
+	int err = 0;
+	int fw_slot;
+
+	dev_info(pdsc->dev, "Installing firmware\n");
+
+	dl = priv_to_devlink(pdsc);
+	devlink_flash_update_status_notify(dl, "Preparing to flash",
+					   NULL, 0, 0);
+
+	buf_sz = sizeof(pdsc->cmd_regs->data);
+
+	dev_dbg(pdsc->dev,
+		"downloading firmware - size %d part_sz %d nparts %lu\n",
+		(int)fw->size, buf_sz, DIV_ROUND_UP(fw->size, buf_sz));
+
+	offset = 0;
+	next_interval = 0;
+	data_addr = offsetof(struct pds_core_dev_cmd_regs, data);
+	while (offset < fw->size) {
+		if (offset >= next_interval) {
+			devlink_flash_update_status_notify(dl, "Downloading",
+							   NULL, offset,
+							   fw->size);
+			next_interval = offset +
+					(fw->size / PDSC_FW_INTERVAL_FRACTION);
+		}
+
+		copy_sz = min_t(unsigned int, buf_sz, fw->size - offset);
+		mutex_lock(&pdsc->devcmd_lock);
+		memcpy_toio(&pdsc->cmd_regs->data, fw->data + offset, copy_sz);
+		err = pdsc_devcmd_fw_download_locked(pdsc, data_addr,
+						     offset, copy_sz);
+		mutex_unlock(&pdsc->devcmd_lock);
+		if (err) {
+			dev_err(pdsc->dev,
+				"download failed offset 0x%x addr 0x%llx len 0x%x: %pe\n",
+				offset, data_addr, copy_sz, ERR_PTR(err));
+			NL_SET_ERR_MSG_MOD(extack, "Segment download failed");
+			goto err_out;
+		}
+		offset += copy_sz;
+	}
+	devlink_flash_update_status_notify(dl, "Downloading", NULL,
+					   fw->size, fw->size);
+
+	devlink_flash_update_timeout_notify(dl, "Installing", NULL,
+					    PDSC_FW_INSTALL_TIMEOUT);
+
+	fw_slot = pdsc_devcmd_fw_install(pdsc);
+	if (fw_slot < 0) {
+		err = fw_slot;
+		dev_err(pdsc->dev, "install failed: %pe\n", ERR_PTR(err));
+		NL_SET_ERR_MSG_MOD(extack, "Failed to start firmware install");
+		goto err_out;
+	}
+
+	err = pdsc_fw_status_long_wait(pdsc, "Installing",
+				       PDSC_FW_INSTALL_TIMEOUT,
+				       PDS_CORE_FW_INSTALL_STATUS,
+				       extack);
+	if (err)
+		goto err_out;
+
+	devlink_flash_update_timeout_notify(dl, "Selecting", NULL,
+					    PDSC_FW_SELECT_TIMEOUT);
+
+	err = pdsc_devcmd_fw_activate(pdsc, fw_slot);
+	if (err) {
+		NL_SET_ERR_MSG_MOD(extack, "Failed to start firmware select");
+		goto err_out;
+	}
+
+	err = pdsc_fw_status_long_wait(pdsc, "Selecting",
+				       PDSC_FW_SELECT_TIMEOUT,
+				       PDS_CORE_FW_ACTIVATE_STATUS,
+				       extack);
+	if (err)
+		goto err_out;
+
+	dev_info(pdsc->dev, "Firmware update completed, slot %d\n", fw_slot);
+
+err_out:
+	if (err)
+		devlink_flash_update_status_notify(dl, "Flash failed",
+						   NULL, 0, 0);
+	else
+		devlink_flash_update_status_notify(dl, "Flash done",
+						   NULL, 0, 0);
+	return err;
+}
diff --git a/drivers/net/ethernet/amd/pds_core/main.c b/drivers/net/ethernet/amd/pds_core/main.c
new file mode 100644
index 0000000000..3a45bf474a
--- /dev/null
+++ b/drivers/net/ethernet/amd/pds_core/main.c
@@ -0,0 +1,478 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright(c) 2023 Advanced Micro Devices, Inc */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/pci.h>
+
+#include <linux/pds/pds_common.h>
+
+#include "core.h"
+
+MODULE_DESCRIPTION(PDSC_DRV_DESCRIPTION);
+MODULE_AUTHOR("Advanced Micro Devices, Inc");
+MODULE_LICENSE("GPL");
+
+/* Supported devices */
+static const struct pci_device_id pdsc_id_table[] = {
+	{ PCI_VDEVICE(PENSANDO, PCI_DEVICE_ID_PENSANDO_CORE_PF) },
+	{ PCI_VDEVICE(PENSANDO, PCI_DEVICE_ID_PENSANDO_VDPA_VF) },
+	{ 0, }	/* end of table */
+};
+MODULE_DEVICE_TABLE(pci, pdsc_id_table);
+
+static void pdsc_wdtimer_cb(struct timer_list *t)
+{
+	struct pdsc *pdsc = from_timer(pdsc, t, wdtimer);
+
+	dev_dbg(pdsc->dev, "%s: jiffies %ld\n", __func__, jiffies);
+	mod_timer(&pdsc->wdtimer,
+		  round_jiffies(jiffies + pdsc->wdtimer_period));
+
+	queue_work(pdsc->wq, &pdsc->health_work);
+}
+
+static void pdsc_unmap_bars(struct pdsc *pdsc)
+{
+	struct pdsc_dev_bar *bars = pdsc->bars;
+	unsigned int i;
+
+	for (i = 0; i < PDS_CORE_BARS_MAX; i++) {
+		if (bars[i].vaddr)
+			pci_iounmap(pdsc->pdev, bars[i].vaddr);
+	}
+}
+
+static int pdsc_map_bars(struct pdsc *pdsc)
+{
+	struct pdsc_dev_bar *bar = pdsc->bars;
+	struct pci_dev *pdev = pdsc->pdev;
+	struct device *dev = pdsc->dev;
+	struct pdsc_dev_bar *bars;
+	unsigned int i, j;
+	int num_bars = 0;
+	int err;
+	u32 sig;
+
+	bars = pdsc->bars;
+
+	/* Since the PCI interface in the hardware is configurable,
+	 * we need to poke into all the bars to find the set we're
+	 * expecting.
+	 */
+	for (i = 0, j = 0; i < PDS_CORE_BARS_MAX; i++) {
+		if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
+			continue;
+
+		bars[j].len = pci_resource_len(pdev, i);
+		bars[j].bus_addr = pci_resource_start(pdev, i);
+		bars[j].res_index = i;
+
+		/* only map the whole bar 0 */
+		if (j > 0) {
+			bars[j].vaddr = NULL;
+		} else {
+			bars[j].vaddr = pci_iomap(pdev, i, bars[j].len);
+			if (!bars[j].vaddr) {
+				dev_err(dev, "Cannot map BAR %d, aborting\n", i);
+				return -ENODEV;
+			}
+		}
+
+		j++;
+	}
+	num_bars = j;
+
+	/* BAR0: dev_cmd and interrupts */
+	if (num_bars < 1) {
+		dev_err(dev, "No bars found\n");
+		err = -EFAULT;
+		goto err_out;
+	}
+
+	if (bar->len < PDS_CORE_BAR0_SIZE) {
+		dev_err(dev, "Resource bar size %lu too small\n", bar->len);
+		err = -EFAULT;
+		goto err_out;
+	}
+
+	pdsc->info_regs = bar->vaddr + PDS_CORE_BAR0_DEV_INFO_REGS_OFFSET;
+	pdsc->cmd_regs = bar->vaddr + PDS_CORE_BAR0_DEV_CMD_REGS_OFFSET;
+	pdsc->intr_status = bar->vaddr + PDS_CORE_BAR0_INTR_STATUS_OFFSET;
+	pdsc->intr_ctrl = bar->vaddr + PDS_CORE_BAR0_INTR_CTRL_OFFSET;
+
+	sig = ioread32(&pdsc->info_regs->signature);
+	if (sig != PDS_CORE_DEV_INFO_SIGNATURE) {
+		dev_err(dev, "Incompatible firmware signature %x", sig);
+		err = -EFAULT;
+		goto err_out;
+	}
+
+	/* BAR1: doorbells */
+	bar++;
+	if (num_bars < 2) {
+		dev_err(dev, "Doorbell bar missing\n");
+		err = -EFAULT;
+		goto err_out;
+	}
+
+	pdsc->db_pages = bar->vaddr;
+	pdsc->phy_db_pages = bar->bus_addr;
+
+	return 0;
+
+err_out:
+	pdsc_unmap_bars(pdsc);
+	return err;
+}
+
+void __iomem *pdsc_map_dbpage(struct pdsc *pdsc, int page_num)
+{
+	return pci_iomap_range(pdsc->pdev,
+			       pdsc->bars[PDS_CORE_PCI_BAR_DBELL].res_index,
+			       (u64)page_num << PAGE_SHIFT, PAGE_SIZE);
+}
+
+static int pdsc_sriov_configure(struct pci_dev *pdev, int num_vfs)
+{
+	struct pdsc *pdsc = pci_get_drvdata(pdev);
+	struct device *dev = pdsc->dev;
+	int ret = 0;
+
+	if (num_vfs > 0) {
+		pdsc->vfs = kcalloc(num_vfs, sizeof(struct pdsc_vf),
+				    GFP_KERNEL);
+		if (!pdsc->vfs)
+			return -ENOMEM;
+		pdsc->num_vfs = num_vfs;
+
+		ret = pci_enable_sriov(pdev, num_vfs);
+		if (ret) {
+			dev_err(dev, "Cannot enable SRIOV: %pe\n",
+				ERR_PTR(ret));
+			goto no_vfs;
+		}
+
+		return num_vfs;
+	}
+
+no_vfs:
+	pci_disable_sriov(pdev);
+
+	kfree(pdsc->vfs);
+	pdsc->vfs = NULL;
+	pdsc->num_vfs = 0;
+
+	return ret;
+}
+
+static int pdsc_init_vf(struct pdsc *vf)
+{
+	struct devlink *dl;
+	struct pdsc *pf;
+	int err;
+
+	pf = pdsc_get_pf_struct(vf->pdev);
+	if (IS_ERR_OR_NULL(pf))
+		return PTR_ERR(pf) ?: -1;
+
+	vf->vf_id = pci_iov_vf_id(vf->pdev);
+
+	dl = priv_to_devlink(vf);
+	devl_lock(dl);
+	devl_register(dl);
+	devl_unlock(dl);
+
+	pf->vfs[vf->vf_id].vf = vf;
+	err = pdsc_auxbus_dev_add(vf, pf);
+	if (err) {
+		devl_lock(dl);
+		devl_unregister(dl);
+		devl_unlock(dl);
+	}
+
+	return err;
+}
+
+static const struct devlink_health_reporter_ops pdsc_fw_reporter_ops = {
+	.name = "fw",
+	.diagnose = pdsc_fw_reporter_diagnose,
+};
+
+static const struct devlink_param pdsc_dl_params[] = {
+	DEVLINK_PARAM_GENERIC(ENABLE_VNET,
+			      BIT(DEVLINK_PARAM_CMODE_RUNTIME),
+			      pdsc_dl_enable_get,
+			      pdsc_dl_enable_set,
+			      pdsc_dl_enable_validate),
+};
+
+#define PDSC_WQ_NAME_LEN 24
+
+static int pdsc_init_pf(struct pdsc *pdsc)
+{
+	struct devlink_health_reporter *hr;
+	char wq_name[PDSC_WQ_NAME_LEN];
+	struct devlink *dl;
+	int err;
+
+	pcie_print_link_status(pdsc->pdev);
+
+	err = pci_request_regions(pdsc->pdev, PDS_CORE_DRV_NAME);
+	if (err) {
+		dev_err(pdsc->dev, "Cannot request PCI regions: %pe\n",
+			ERR_PTR(err));
+		return err;
+	}
+
+	err = pdsc_map_bars(pdsc);
+	if (err)
+		goto err_out_release_regions;
+
+	/* General workqueue and timer, but don't start timer yet */
+	snprintf(wq_name, sizeof(wq_name), "%s.%d", PDS_CORE_DRV_NAME, pdsc->uid);
+	pdsc->wq = create_singlethread_workqueue(wq_name);
+	INIT_WORK(&pdsc->health_work, pdsc_health_thread);
+	timer_setup(&pdsc->wdtimer, pdsc_wdtimer_cb, 0);
+	pdsc->wdtimer_period = PDSC_WATCHDOG_SECS * HZ;
+
+	mutex_init(&pdsc->devcmd_lock);
+	mutex_init(&pdsc->config_lock);
+	spin_lock_init(&pdsc->adminq_lock);
+
+	mutex_lock(&pdsc->config_lock);
+	set_bit(PDSC_S_FW_DEAD, &pdsc->state);
+
+	err = pdsc_setup(pdsc, PDSC_SETUP_INIT);
+	if (err) {
+		mutex_unlock(&pdsc->config_lock);
+		goto err_out_unmap_bars;
+	}
+
+	err = pdsc_start(pdsc);
+	if (err) {
+		mutex_unlock(&pdsc->config_lock);
+		goto err_out_teardown;
+	}
+
+	mutex_unlock(&pdsc->config_lock);
+
+	dl = priv_to_devlink(pdsc);
+	devl_lock(dl);
+	err = devl_params_register(dl, pdsc_dl_params,
+				   ARRAY_SIZE(pdsc_dl_params));
+	if (err) {
+		devl_unlock(dl);
+		dev_warn(pdsc->dev, "Failed to register devlink params: %pe\n",
+			 ERR_PTR(err));
+		goto err_out_stop;
+	}
+
+	hr = devl_health_reporter_create(dl, &pdsc_fw_reporter_ops, 0, pdsc);
+	if (IS_ERR(hr)) {
+		devl_unlock(dl);
+		dev_warn(pdsc->dev, "Failed to create fw reporter: %pe\n", hr);
+		err = PTR_ERR(hr);
+		goto err_out_unreg_params;
+	}
+	pdsc->fw_reporter = hr;
+
+	devl_register(dl);
+	devl_unlock(dl);
+
+	/* Lastly, start the health check timer */
+	mod_timer(&pdsc->wdtimer, round_jiffies(jiffies + pdsc->wdtimer_period));
+
+	return 0;
+
+err_out_unreg_params:
+	devlink_params_unregister(dl, pdsc_dl_params,
+				  ARRAY_SIZE(pdsc_dl_params));
+err_out_stop:
+	pdsc_stop(pdsc);
+err_out_teardown:
+	pdsc_teardown(pdsc, PDSC_TEARDOWN_REMOVING);
+err_out_unmap_bars:
+	del_timer_sync(&pdsc->wdtimer);
+	if (pdsc->wq)
+		destroy_workqueue(pdsc->wq);
+	mutex_destroy(&pdsc->config_lock);
+	mutex_destroy(&pdsc->devcmd_lock);
+	pci_free_irq_vectors(pdsc->pdev);
+	pdsc_unmap_bars(pdsc);
+err_out_release_regions:
+	pci_release_regions(pdsc->pdev);
+
+	return err;
+}
+
+static const struct devlink_ops pdsc_dl_ops = {
+	.info_get	= pdsc_dl_info_get,
+	.flash_update	= pdsc_dl_flash_update,
+};
+
+static const struct devlink_ops pdsc_dl_vf_ops = {
+};
+
+static DEFINE_IDA(pdsc_ida);
+
+static int pdsc_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+	struct device *dev = &pdev->dev;
+	const struct devlink_ops *ops;
+	struct devlink *dl;
+	struct pdsc *pdsc;
+	bool is_pf;
+	int err;
+
+	is_pf = !pdev->is_virtfn;
+	ops = is_pf ? &pdsc_dl_ops : &pdsc_dl_vf_ops;
+	dl = devlink_alloc(ops, sizeof(struct pdsc), dev);
+	if (!dl)
+		return -ENOMEM;
+	pdsc = devlink_priv(dl);
+
+	pdsc->pdev = pdev;
+	pdsc->dev = &pdev->dev;
+	set_bit(PDSC_S_INITING_DRIVER, &pdsc->state);
+	pci_set_drvdata(pdev, pdsc);
+	pdsc_debugfs_add_dev(pdsc);
+
+	err = ida_alloc(&pdsc_ida, GFP_KERNEL);
+	if (err < 0) {
+		dev_err(pdsc->dev, "%s: id alloc failed: %pe\n",
+			__func__, ERR_PTR(err));
+		goto err_out_free_devlink;
+	}
+	pdsc->uid = err;
+
+	/* Query system for DMA addressing limitation for the device. */
+	err = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(PDS_CORE_ADDR_LEN));
+	if (err) {
+		dev_err(dev, "Unable to obtain 64-bit DMA for consistent allocations, aborting: %pe\n",
+			ERR_PTR(err));
+		goto err_out_free_ida;
+	}
+
+	err = pci_enable_device(pdev);
+	if (err) {
+		dev_err(dev, "Cannot enable PCI device: %pe\n", ERR_PTR(err));
+		goto err_out_free_ida;
+	}
+	pci_set_master(pdev);
+
+	if (is_pf)
+		err = pdsc_init_pf(pdsc);
+	else
+		err = pdsc_init_vf(pdsc);
+	if (err) {
+		dev_err(dev, "Cannot init device: %pe\n", ERR_PTR(err));
+		goto err_out_disable_device;
+	}
+
+	clear_bit(PDSC_S_INITING_DRIVER, &pdsc->state);
+	return 0;
+
+err_out_disable_device:
+	pci_disable_device(pdev);
+err_out_free_ida:
+	ida_free(&pdsc_ida, pdsc->uid);
+err_out_free_devlink:
+	pdsc_debugfs_del_dev(pdsc);
+	devlink_free(dl);
+
+	return err;
+}
+
+static void pdsc_remove(struct pci_dev *pdev)
+{
+	struct pdsc *pdsc = pci_get_drvdata(pdev);
+	struct devlink *dl;
+
+	/* Unhook the registrations first to be sure there
+	 * are no requests while we're stopping.
+	 */
+	dl = priv_to_devlink(pdsc);
+	devl_lock(dl);
+	devl_unregister(dl);
+	if (!pdev->is_virtfn) {
+		if (pdsc->fw_reporter) {
+			devl_health_reporter_destroy(pdsc->fw_reporter);
+			pdsc->fw_reporter = NULL;
+		}
+		devl_params_unregister(dl, pdsc_dl_params,
+				       ARRAY_SIZE(pdsc_dl_params));
+	}
+	devl_unlock(dl);
+
+	if (pdev->is_virtfn) {
+		struct pdsc *pf;
+
+		pf = pdsc_get_pf_struct(pdsc->pdev);
+		if (!IS_ERR(pf)) {
+			pdsc_auxbus_dev_del(pdsc, pf);
+			pf->vfs[pdsc->vf_id].vf = NULL;
+		}
+	} else {
+		/* Remove the VFs and their aux_bus connections before other
+		 * cleanup so that the clients can use the AdminQ to cleanly
+		 * shut themselves down.
+		 */
+		pdsc_sriov_configure(pdev, 0);
+
+		del_timer_sync(&pdsc->wdtimer);
+		if (pdsc->wq)
+			destroy_workqueue(pdsc->wq);
+
+		mutex_lock(&pdsc->config_lock);
+		set_bit(PDSC_S_STOPPING_DRIVER, &pdsc->state);
+
+		pdsc_stop(pdsc);
+		pdsc_teardown(pdsc, PDSC_TEARDOWN_REMOVING);
+		mutex_unlock(&pdsc->config_lock);
+		mutex_destroy(&pdsc->config_lock);
+		mutex_destroy(&pdsc->devcmd_lock);
+
+		pci_free_irq_vectors(pdev);
+		pdsc_unmap_bars(pdsc);
+		pci_release_regions(pdev);
+	}
+
+	pci_disable_device(pdev);
+
+	ida_free(&pdsc_ida, pdsc->uid);
+	pdsc_debugfs_del_dev(pdsc);
+	devlink_free(dl);
+}
+
+static struct pci_driver pdsc_driver = {
+	.name = PDS_CORE_DRV_NAME,
+	.id_table = pdsc_id_table,
+	.probe = pdsc_probe,
+	.remove = pdsc_remove,
+	.sriov_configure = pdsc_sriov_configure,
+};
+
+void *pdsc_get_pf_struct(struct pci_dev *vf_pdev)
+{
+	return pci_iov_get_pf_drvdata(vf_pdev, &pdsc_driver);
+}
+EXPORT_SYMBOL_GPL(pdsc_get_pf_struct);
+
+static int __init pdsc_init_module(void)
+{
+	if (strcmp(KBUILD_MODNAME, PDS_CORE_DRV_NAME))
+		return -EINVAL;
+
+	pdsc_debugfs_create();
+	return pci_register_driver(&pdsc_driver);
+}
+
+static void __exit pdsc_cleanup_module(void)
+{
+	pci_unregister_driver(&pdsc_driver);
+	pdsc_debugfs_destroy();
+}
+
+module_init(pdsc_init_module);
+module_exit(pdsc_cleanup_module);