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From: Akhil Goyal <gakhil@marvell.com>
To: <dev@dpdk.org>
CC: <thomas@monjalon.net>, <david.marchand@redhat.com>,
<hemant.agrawal@nxp.com>, <jerinj@marvell.com>, <hkalra@marvell.com>,
<stephen@networkplumber.org>, <sachin.saxena@oss.nxp.com>,
<ferruh.yigit@amd.com>, Akhil Goyal <gakhil@marvell.com>
Subject: [PATCH v6 8/9] raw/cnxk_rvu_lf: support getting BAR addresses
Date: Mon, 28 Oct 2024 16:31:14 +0530
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Added rte_pmd_rvu_lf_bar_get() API to get BAR address
for out of tree drivers to configure hardware.
Signed-off-by: Akhil Goyal <gakhil@marvell.com>
---
doc/guides/rawdevs/cnxk_rvu_lf.rst | 8 +++++++
drivers/raw/cnxk_rvu_lf/cnxk_rvu_lf.c | 24 ++++++++++++++++++++
drivers/raw/cnxk_rvu_lf/cnxk_rvu_lf_driver.h | 18 +++++++++++++++
drivers/raw/cnxk_rvu_lf/version.map | 1 +
4 files changed, 51 insertions(+)
diff --git a/doc/guides/rawdevs/cnxk_rvu_lf.rst b/doc/guides/rawdevs/cnxk_rvu_lf.rst
index 0854c88ac9..708c9410fd 100644
--- a/doc/guides/rawdevs/cnxk_rvu_lf.rst
+++ b/doc/guides/rawdevs/cnxk_rvu_lf.rst
@@ -22,6 +22,7 @@ The RVU LF device implements following features in the rawdev API:
- Register/unregister mailbox callbacks for the other side to process mailboxes.
- Set mailbox message ID range to be used by the driver.
- Process mailbox messages.
+- Get BAR Addresses for the out of tree drivers to configure registers.
Limitations
-----------
@@ -79,3 +80,10 @@ It accepts an opaque pointer of a request and its size which can be defined by u
and provides an opaque pointer for a response and its length.
PF and VF out of tree driver can define its own request and response based on the message id
of the mailbox.
+
+Get BAR addresses
+-----------------
+
+Out of tree drivers can retrieve PCI BAR addresses of the device using the API
+``rte_pmd_rvu_lf_bar_get()``. This helps PF/VF drivers to configure the
+registers of the hardware device.
diff --git a/drivers/raw/cnxk_rvu_lf/cnxk_rvu_lf.c b/drivers/raw/cnxk_rvu_lf/cnxk_rvu_lf.c
index 156b9460c1..3a3971ecd3 100644
--- a/drivers/raw/cnxk_rvu_lf/cnxk_rvu_lf.c
+++ b/drivers/raw/cnxk_rvu_lf/cnxk_rvu_lf.c
@@ -103,6 +103,30 @@ rte_pmd_rvu_lf_irq_unregister(uint8_t dev_id, unsigned int irq,
return roc_rvu_lf_irq_unregister(roc_rvu_lf, irq, (roc_rvu_lf_intr_cb_fn)cb, data);
}
+int
+rte_pmd_rvu_lf_bar_get(uint8_t dev_id, uint8_t bar_num, size_t *va, size_t *mask)
+{
+ struct roc_rvu_lf *roc_rvu_lf;
+ struct rte_rawdev *rawdev;
+
+ rawdev = rte_rawdev_pmd_get_dev(dev_id);
+ if (rawdev == NULL)
+ return -EINVAL;
+
+ roc_rvu_lf = (struct roc_rvu_lf *)rawdev->dev_private;
+
+ if (bar_num > PCI_MAX_RESOURCE ||
+ (roc_rvu_lf->pci_dev->mem_resource[bar_num].addr == NULL)) {
+ *va = 0;
+ *mask = 0;
+ return -ENOTSUP;
+ }
+ *va = (size_t)(roc_rvu_lf->pci_dev->mem_resource[bar_num].addr);
+ *mask = (size_t)(roc_rvu_lf->pci_dev->mem_resource[bar_num].len - 1);
+
+ return 0;
+}
+
uint16_t
rte_pmd_rvu_lf_npa_pf_func_get(void)
{
diff --git a/drivers/raw/cnxk_rvu_lf/cnxk_rvu_lf_driver.h b/drivers/raw/cnxk_rvu_lf/cnxk_rvu_lf_driver.h
index 9c4ede2602..e405831ce1 100644
--- a/drivers/raw/cnxk_rvu_lf/cnxk_rvu_lf_driver.h
+++ b/drivers/raw/cnxk_rvu_lf/cnxk_rvu_lf_driver.h
@@ -193,6 +193,24 @@ __rte_internal
int rte_pmd_rvu_lf_msg_process(uint8_t dev_id, uint16_t vf, uint16_t msg_id,
void *req, uint16_t req_len, void *rsp, uint16_t rsp_len);
+/**
+ * Get BAR addresses for the RVU LF device.
+ *
+ * @param dev_id
+ * device id of RVU LF device
+ * @param bar_num
+ * BAR number for which address is required
+ * @param[out] va
+ * Virtual address of the BAR. 0 if not mapped
+ * @param[out] mask
+ * BAR address mask, 0 if not mapped
+ *
+ * @return
+ * Returns 0 on success, negative error code otherwise
+ */
+__rte_internal
+int rte_pmd_rvu_lf_bar_get(uint8_t dev_id, uint8_t bar_num, size_t *va, size_t *mask);
+
#ifdef __cplusplus
}
#endif
diff --git a/drivers/raw/cnxk_rvu_lf/version.map b/drivers/raw/cnxk_rvu_lf/version.map
index aa974f629e..012f05d1e4 100644
--- a/drivers/raw/cnxk_rvu_lf/version.map
+++ b/drivers/raw/cnxk_rvu_lf/version.map
@@ -1,6 +1,7 @@
INTERNAL {
global:
+ rte_pmd_rvu_lf_bar_get;
rte_pmd_rvu_lf_irq_register;
rte_pmd_rvu_lf_irq_unregister;
rte_pmd_rvu_lf_msg_handler_register;
--
2.25.1