[flashrom-gerrit] Change in flashrom[master]: pcidev: Avoid internal programmer relying on pacc global

[Edward O'Callaghan (Code Review)]

Edward O'Callaghan has submitted this change. ( https://review.coreboot.org/c/flashrom/+/59275 )

Change subject: pcidev: Avoid internal programmer relying on pacc global
......................................................................

pcidev: Avoid internal programmer relying on pacc global

Make progress towards the goal of removing pacc from global
state as noted in the FIXME of programmer.h

BUG=b:220950271
TEST=```sudo ./flashrom -p internal --flash-size
<snip>
Found Programmer flash chip "Opaque flash chip" (16384 kB, Programmer-specific) mapped at physical address 0x0000000000000000.
16777216
```

Change-Id: Id83bfd41f785f907e52a65a6689e8c7016fc1b77
Signed-off-by: Edward O'Callaghan 
Reviewed-on: https://review.coreboot.org/c/flashrom/+/59275
Tested-by: build bot (Jenkins) 
Reviewed-by: Nico Huber 
Reviewed-by: Anastasia Klimchuk 
---
M internal.c
M pcidev.c
M programmer.h
3 files changed, 25 insertions(+), 23 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Nico Huber: Looks good to me, approved
  Anastasia Klimchuk: Looks good to me, approved

diff --git a/internal.c b/internal.c
index 995290e..dcb83cd 100644
--- a/internal.c
+++ b/internal.c
@@ -36,58 +36,49 @@

struct pci_dev *pci_dev_find_vendorclass(uint16_t vendor, uint16_t devclass)
 {
-	struct pci_dev *temp;
+	struct pci_dev *temp = NULL;
    struct pci_filter filter;
    uint16_t tmp2;

pci_filter_init(NULL, &filter);
    filter.vendor = vendor;

-	for (temp = pacc->devices; temp; temp = temp->next)
-		if (pci_filter_match(&filter, temp)) {
-			/* Read PCI class */
-			tmp2 = pci_read_word(temp, 0x0a);
-			if (tmp2 == devclass)
-				return temp;
-		}
+	while ((temp = pcidev_scandev(&filter, temp))) {
+		/* Read PCI class */
+		tmp2 = pci_read_word(temp, 0x0a);
+		if (tmp2 == devclass)
+			return temp;
+	}

return NULL;
 }

struct pci_dev *pci_dev_find(uint16_t vendor, uint16_t device)
 {
-	struct pci_dev *temp;
    struct pci_filter filter;

pci_filter_init(NULL, &filter);
    filter.vendor = vendor;
    filter.device = device;

-	for (temp = pacc->devices; temp; temp = temp->next)
-		if (pci_filter_match(&filter, temp))
-			return temp;
-
-	return NULL;
+	return pcidev_scandev(&filter, NULL);
 }

struct pci_dev *pci_card_find(uint16_t vendor, uint16_t device,
    		      uint16_t card_vendor, uint16_t card_device)
 {
-	struct pci_dev *temp;
+	struct pci_dev *temp = NULL;
    struct pci_filter filter;

pci_filter_init(NULL, &filter);
    filter.vendor = vendor;
    filter.device = device;

-	for (temp = pacc->devices; temp; temp = temp->next)
-		if (pci_filter_match(&filter, temp)) {
-			if ((card_vendor ==
-			     pci_read_word(temp, PCI_SUBSYSTEM_VENDOR_ID))
-			    && (card_device ==
-				pci_read_word(temp, PCI_SUBSYSTEM_ID)))
-				return temp;
-		}
+	while ((temp = pcidev_scandev(&filter, temp))) {
+		if ((card_vendor == pci_read_word(temp, PCI_SUBSYSTEM_VENDOR_ID))
+		    && (card_device == pci_read_word(temp, PCI_SUBSYSTEM_ID)))
+			return temp;
+	}

return NULL;
 }
diff --git a/pcidev.c b/pcidev.c
index bd558ed..f323851 100644
--- a/pcidev.c
+++ b/pcidev.c
@@ -148,6 +148,15 @@
    return (uintptr_t)addr;
 }

+struct pci_dev *pcidev_scandev(struct pci_filter *filter, struct pci_dev *start)
+{
+	struct pci_dev *temp;
+	for (temp = start ? start->next : pacc->devices; temp; temp = temp->next)
+		if (pci_filter_match(filter, temp))
+			return temp;
+	return NULL;
+}
+
 static int pcidev_shutdown(void *data)
 {
    if (pacc == NULL) {
diff --git a/programmer.h b/programmer.h
index 08e5e9c..4024966 100644
--- a/programmer.h
+++ b/programmer.h
@@ -117,6 +117,7 @@

#if NEED_PCI == 1
 struct pci_dev;
+struct pci_filter;

/* pcidev.c */
 // FIXME: This needs to be local, not global(?)
@@ -124,6 +125,7 @@
 int pci_init_common(void);
 uintptr_t pcidev_readbar(struct pci_dev *dev, int bar);
 struct pci_dev *pcidev_init(const struct dev_entry *devs, int bar);
+struct pci_dev *pcidev_scandev(struct pci_filter *filter, struct pci_dev *start);
 /* rpci_write_* are reversible writes. The original PCI config space register
  * contents will be restored on shutdown.
  * To clone the pci_dev instances internally, the `pacc` global