PCI/DOE: Rename DOE protocol to feature

DOE r1.1 replaced all occurrences of "protocol" with the term "feature" or
"Data Object Type".  PCIe r6.1 incorporated that change.

Rename the existing terms protocol with feature.

Link: https://lore.kernel.org/r/20250306075211.1855177-1-alistair@alistair23.me
Signed-off-by: Alistair Francis <alistair@alistair23.me>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Lukas Wunner <lukas@wunner.de>

diff --git a/drivers/pci/doe.c b/drivers/pci/doe.c
index 7bd7892c522289885a721a2b2b8d8ce7b4e72a4b..2f36262e76f86d300330bf89fb747fbafc810b4d 100644 (file)
--- a/drivers/pci/doe.c
+++ b/drivers/pci/doe.c
@@ -22,7 +22,7 @@
 
 #include "pci.h"
 
-#define PCI_DOE_PROTOCOL_DISCOVERY 0
+#define PCI_DOE_FEATURE_DISCOVERY 0
 
 /* Timeout of 1 second from 6.30.2 Operation, PCI Spec r6.0 */
 #define PCI_DOE_TIMEOUT HZ
@@ -43,7 +43,7 @@
  *
  * @pdev: PCI device this mailbox belongs to
  * @cap_offset: Capability offset
- * @prots: Array of protocols supported (encoded as long values)
+ * @feats: Array of features supported (encoded as long values)
  * @wq: Wait queue for work item
  * @work_queue: Queue of pci_doe_work items
  * @flags: Bit array of PCI_DOE_FLAG_* flags
@@ -51,14 +51,14 @@
 struct pci_doe_mb {
        struct pci_dev *pdev;
        u16 cap_offset;
-       struct xarray prots;
+       struct xarray feats;
 
        wait_queue_head_t wq;
        struct workqueue_struct *work_queue;
        unsigned long flags;
 };
 
-struct pci_doe_protocol {
+struct pci_doe_feature {
        u16 vid;
        u8 type;
 };
@@ -66,7 +66,7 @@ struct pci_doe_protocol {
 /**
  * struct pci_doe_task - represents a single query/response
  *
- * @prot: DOE Protocol
+ * @feat: DOE Feature
  * @request_pl: The request payload
  * @request_pl_sz: Size of the request payload (bytes)
  * @response_pl: The response payload
@@ -78,7 +78,7 @@ struct pci_doe_protocol {
  * @doe_mb: Used internally by the mailbox
  */
 struct pci_doe_task {
-       struct pci_doe_protocol prot;
+       struct pci_doe_feature feat;
        const __le32 *request_pl;
        size_t request_pl_sz;
        __le32 *response_pl;
@@ -183,8 +183,8 @@ static int pci_doe_send_req(struct pci_doe_mb *doe_mb,
                length = 0;
 
        /* Write DOE Header */
-       val = FIELD_PREP(PCI_DOE_DATA_OBJECT_HEADER_1_VID, task->prot.vid) |
-               FIELD_PREP(PCI_DOE_DATA_OBJECT_HEADER_1_TYPE, task->prot.type);
+       val = FIELD_PREP(PCI_DOE_DATA_OBJECT_HEADER_1_VID, task->feat.vid) |
+               FIELD_PREP(PCI_DOE_DATA_OBJECT_HEADER_1_TYPE, task->feat.type);
        pci_write_config_dword(pdev, offset + PCI_DOE_WRITE, val);
        pci_write_config_dword(pdev, offset + PCI_DOE_WRITE,
                               FIELD_PREP(PCI_DOE_DATA_OBJECT_HEADER_2_LENGTH,
@@ -229,12 +229,12 @@ static int pci_doe_recv_resp(struct pci_doe_mb *doe_mb, struct pci_doe_task *tas
        int i = 0;
        u32 val;
 
-       /* Read the first dword to get the protocol */
+       /* Read the first dword to get the feature */
        pci_read_config_dword(pdev, offset + PCI_DOE_READ, &val);
-       if ((FIELD_GET(PCI_DOE_DATA_OBJECT_HEADER_1_VID, val) != task->prot.vid) ||
-           (FIELD_GET(PCI_DOE_DATA_OBJECT_HEADER_1_TYPE, val) != task->prot.type)) {
-               dev_err_ratelimited(&pdev->dev, "[%x] expected [VID, Protocol] = [%04x, %02x], got [%04x, %02x]\n",
-                                   doe_mb->cap_offset, task->prot.vid, task->prot.type,
+       if ((FIELD_GET(PCI_DOE_DATA_OBJECT_HEADER_1_VID, val) != task->feat.vid) ||
+           (FIELD_GET(PCI_DOE_DATA_OBJECT_HEADER_1_TYPE, val) != task->feat.type)) {
+               dev_err_ratelimited(&pdev->dev, "[%x] expected [VID, Feature] = [%04x, %02x], got [%04x, %02x]\n",
+                                   doe_mb->cap_offset, task->feat.vid, task->feat.type,
                                    FIELD_GET(PCI_DOE_DATA_OBJECT_HEADER_1_VID, val),
                                    FIELD_GET(PCI_DOE_DATA_OBJECT_HEADER_1_TYPE, val));
                return -EIO;
@@ -396,7 +396,7 @@ static void pci_doe_task_complete(struct pci_doe_task *task)
 }
 
 static int pci_doe_discovery(struct pci_doe_mb *doe_mb, u8 capver, u8 *index, u16 *vid,
-                            u8 *protocol)
+                            u8 *feature)
 {
        u32 request_pl = FIELD_PREP(PCI_DOE_DATA_OBJECT_DISC_REQ_3_INDEX,
                                    *index) |
@@ -407,7 +407,7 @@ static int pci_doe_discovery(struct pci_doe_mb *doe_mb, u8 capver, u8 *index, u1
        u32 response_pl;
        int rc;
 
-       rc = pci_doe(doe_mb, PCI_VENDOR_ID_PCI_SIG, PCI_DOE_PROTOCOL_DISCOVERY,
+       rc = pci_doe(doe_mb, PCI_VENDOR_ID_PCI_SIG, PCI_DOE_FEATURE_DISCOVERY,
                     &request_pl_le, sizeof(request_pl_le),
                     &response_pl_le, sizeof(response_pl_le));
        if (rc < 0)
@@ -418,7 +418,7 @@ static int pci_doe_discovery(struct pci_doe_mb *doe_mb, u8 capver, u8 *index, u1
 
        response_pl = le32_to_cpu(response_pl_le);
        *vid = FIELD_GET(PCI_DOE_DATA_OBJECT_DISC_RSP_3_VID, response_pl);
-       *protocol = FIELD_GET(PCI_DOE_DATA_OBJECT_DISC_RSP_3_PROTOCOL,
+       *feature = FIELD_GET(PCI_DOE_DATA_OBJECT_DISC_RSP_3_PROTOCOL,
                              response_pl);
        *index = FIELD_GET(PCI_DOE_DATA_OBJECT_DISC_RSP_3_NEXT_INDEX,
                           response_pl);
@@ -426,12 +426,12 @@ static int pci_doe_discovery(struct pci_doe_mb *doe_mb, u8 capver, u8 *index, u1
        return 0;
 }
 
-static void *pci_doe_xa_prot_entry(u16 vid, u8 prot)
+static void *pci_doe_xa_feat_entry(u16 vid, u8 prot)
 {
        return xa_mk_value((vid << 8) | prot);
 }
 
-static int pci_doe_cache_protocols(struct pci_doe_mb *doe_mb)
+static int pci_doe_cache_features(struct pci_doe_mb *doe_mb)
 {
        u8 index = 0;
        u8 xa_idx = 0;
@@ -450,11 +450,11 @@ static int pci_doe_cache_protocols(struct pci_doe_mb *doe_mb)
                        return rc;
 
                pci_dbg(doe_mb->pdev,
-                       "[%x] Found protocol %d vid: %x prot: %x\n",
+                       "[%x] Found feature %d vid: %x prot: %x\n",
                        doe_mb->cap_offset, xa_idx, vid, prot);
 
-               rc = xa_insert(&doe_mb->prots, xa_idx++,
-                              pci_doe_xa_prot_entry(vid, prot), GFP_KERNEL);
+               rc = xa_insert(&doe_mb->feats, xa_idx++,
+                              pci_doe_xa_feat_entry(vid, prot), GFP_KERNEL);
                if (rc)
                        return rc;
        } while (index);
@@ -478,7 +478,7 @@ static void pci_doe_cancel_tasks(struct pci_doe_mb *doe_mb)
  * @pdev: PCI device to create the DOE mailbox for
  * @cap_offset: Offset of the DOE mailbox
  *
- * Create a single mailbox object to manage the mailbox protocol at the
+ * Create a single mailbox object to manage the mailbox feature at the
  * cap_offset specified.
  *
  * RETURNS: created mailbox object on success
@@ -497,7 +497,7 @@ static struct pci_doe_mb *pci_doe_create_mb(struct pci_dev *pdev,
        doe_mb->pdev = pdev;
        doe_mb->cap_offset = cap_offset;
        init_waitqueue_head(&doe_mb->wq);
-       xa_init(&doe_mb->prots);
+       xa_init(&doe_mb->feats);
 
        doe_mb->work_queue = alloc_ordered_workqueue("%s %s DOE [%x]", 0,
                                                dev_bus_name(&pdev->dev),
@@ -520,11 +520,11 @@ static struct pci_doe_mb *pci_doe_create_mb(struct pci_dev *pdev,
 
        /*
         * The state machine and the mailbox should be in sync now;
-        * Use the mailbox to query protocols.
+        * Use the mailbox to query features.
         */
-       rc = pci_doe_cache_protocols(doe_mb);
+       rc = pci_doe_cache_features(doe_mb);
        if (rc) {
-               pci_err(pdev, "[%x] failed to cache protocols : %d\n",
+               pci_err(pdev, "[%x] failed to cache features : %d\n",
                        doe_mb->cap_offset, rc);
                goto err_cancel;
        }
@@ -533,7 +533,7 @@ static struct pci_doe_mb *pci_doe_create_mb(struct pci_dev *pdev,
 
 err_cancel:
        pci_doe_cancel_tasks(doe_mb);
-       xa_destroy(&doe_mb->prots);
+       xa_destroy(&doe_mb->feats);
 err_destroy_wq:
        destroy_workqueue(doe_mb->work_queue);
 err_free:
@@ -551,31 +551,31 @@ err_free:
 static void pci_doe_destroy_mb(struct pci_doe_mb *doe_mb)
 {
        pci_doe_cancel_tasks(doe_mb);
-       xa_destroy(&doe_mb->prots);
+       xa_destroy(&doe_mb->feats);
        destroy_workqueue(doe_mb->work_queue);
        kfree(doe_mb);
 }
 
 /**
- * pci_doe_supports_prot() - Return if the DOE instance supports the given
- *                          protocol
+ * pci_doe_supports_feat() - Return if the DOE instance supports the given
+ *                          feature
  * @doe_mb: DOE mailbox capability to query
- * @vid: Protocol Vendor ID
- * @type: Protocol type
+ * @vid: Feature Vendor ID
+ * @type: Feature type
  *
- * RETURNS: True if the DOE mailbox supports the protocol specified
+ * RETURNS: True if the DOE mailbox supports the feature specified
  */
-static bool pci_doe_supports_prot(struct pci_doe_mb *doe_mb, u16 vid, u8 type)
+static bool pci_doe_supports_feat(struct pci_doe_mb *doe_mb, u16 vid, u8 type)
 {
        unsigned long index;
        void *entry;
 
-       /* The discovery protocol must always be supported */
-       if (vid == PCI_VENDOR_ID_PCI_SIG && type == PCI_DOE_PROTOCOL_DISCOVERY)
+       /* The discovery feature must always be supported */
+       if (vid == PCI_VENDOR_ID_PCI_SIG && type == PCI_DOE_FEATURE_DISCOVERY)
                return true;
 
-       xa_for_each(&doe_mb->prots, index, entry)
-               if (entry == pci_doe_xa_prot_entry(vid, type))
+       xa_for_each(&doe_mb->feats, index, entry)
+               if (entry == pci_doe_xa_feat_entry(vid, type))
                        return true;
 
        return false;
@@ -603,7 +603,7 @@ static bool pci_doe_supports_prot(struct pci_doe_mb *doe_mb, u16 vid, u8 type)
 static int pci_doe_submit_task(struct pci_doe_mb *doe_mb,
                               struct pci_doe_task *task)
 {
-       if (!pci_doe_supports_prot(doe_mb, task->prot.vid, task->prot.type))
+       if (!pci_doe_supports_feat(doe_mb, task->feat.vid, task->feat.type))
                return -EINVAL;
 
        if (test_bit(PCI_DOE_FLAG_DEAD, &doe_mb->flags))
@@ -649,8 +649,8 @@ int pci_doe(struct pci_doe_mb *doe_mb, u16 vendor, u8 type,
 {
        DECLARE_COMPLETION_ONSTACK(c);
        struct pci_doe_task task = {
-               .prot.vid = vendor,
-               .prot.type = type,
+               .feat.vid = vendor,
+               .feat.type = type,
                .request_pl = request,
                .request_pl_sz = request_sz,
                .response_pl = response,
@@ -675,9 +675,9 @@ EXPORT_SYMBOL_GPL(pci_doe);
  *
  * @pdev: PCI device
  * @vendor: Vendor ID
- * @type: Data Object Type
+ * @prot: Data Object Type
  *
- * Find first DOE mailbox of a PCI device which supports the given protocol.
+ * Find first DOE mailbox of a PCI device which supports the given feature.
  *
  * RETURNS: Pointer to the DOE mailbox or NULL if none was found.
  */
@@ -688,7 +688,7 @@ struct pci_doe_mb *pci_find_doe_mailbox(struct pci_dev *pdev, u16 vendor,
        unsigned long index;
 
        xa_for_each(&pdev->doe_mbs, index, doe_mb)
-               if (pci_doe_supports_prot(doe_mb, vendor, type))
+               if (pci_doe_supports_feat(doe_mb, vendor, type))
                        return doe_mb;
 
        return NULL;