[PATCH v2 05/25] pci: pci-uclass: Dynamically allocate the PCI regions

[Stefan Roese]

Instead of using a fixed length pre-allocated array of regions, this
patch moves to dynamically allocating the regions based on the number
of available regions plus the necessary regions for DRAM banks.

Since MAX_PCI_REGIONS is not needed any more, its removed completely
with this patch.

Signed-off-by: Stefan Roese <s...@denx.de>
Cc: Simon Glass <s...@chromium.org>
Cc: Bin Meng <bmeng...@gmail.com>
Cc: Thierry Reding <tred...@nvidia.com>
Cc: Marek Vasut <marek.vasut+rene...@gmail.com>

---

Changes in v2:
- Split changes in board/renesas/rcar-common/common.c into separate
  patch

Changes in v1:
- New patch, replaces increase of MAX_PCI_REGIONS to 10

 drivers/pci/pci-uclass.c | 14 ++++++++------
 include/pci.h            |  4 +---
 2 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/drivers/pci/pci-uclass.c b/drivers/pci/pci-uclass.c
index 601557a875..337ac137d1 100644
--- a/drivers/pci/pci-uclass.c
+++ b/drivers/pci/pci-uclass.c
@@ -874,6 +874,7 @@ static void decode_regions(struct pci_controller *hose, 
ofnode parent_node,
        struct bd_info *bd = gd->bd;
        int cells_per_record;
        const u32 *prop;
+       int max_regions;
        int len;
        int i;
 
@@ -893,7 +894,13 @@ static void decode_regions(struct pci_controller *hose, 
ofnode parent_node,
        hose->region_count = 0;
        debug("%s: len=%d, cells_per_record=%d\n", __func__, len,
              cells_per_record);
-       for (i = 0; i < MAX_PCI_REGIONS; i++, len -= cells_per_record) {
+
+       /* Dynamically allocate the regions array */
+       max_regions = len / cells_per_record + CONFIG_NR_DRAM_BANKS;
+       hose->regions = (struct pci_region *)
+               calloc(1, max_regions * sizeof(struct pci_region));
+
+       for (i = 0; i < max_regions; i++, len -= cells_per_record) {
                u64 pci_addr, addr, size;
                int space_code;
                u32 flags;
@@ -943,11 +950,6 @@ static void decode_regions(struct pci_controller *hose, 
ofnode parent_node,
                return;
 
        for (i = 0; i < CONFIG_NR_DRAM_BANKS; ++i) {
-               if (hose->region_count == MAX_PCI_REGIONS) {
-                       pr_err("maximum number of regions parsed, aborting\n");
-                       break;
-               }
-
                if (bd->bi_dram[i].size) {
                        pci_set_region(hose->regions + hose->region_count++,
                                       bd->bi_dram[i].start,
diff --git a/include/pci.h b/include/pci.h
index 2089db9f16..da755af852 100644
--- a/include/pci.h
+++ b/include/pci.h
@@ -590,8 +590,6 @@ extern void pci_cfgfunc_do_nothing(struct pci_controller* 
hose, pci_dev_t dev,
 extern void pci_cfgfunc_config_device(struct pci_controller* hose, pci_dev_t 
dev,
                                      struct pci_config_table *);
 
-#define MAX_PCI_REGIONS                7
-
 #define INDIRECT_TYPE_NO_PCIE_LINK     1
 
 /**
@@ -632,7 +630,7 @@ struct pci_controller {
         * for PCI controllers and a separate UCLASS (or perhaps
         * UCLASS_PCI_GENERIC) is used for bridges.
         */
-       struct pci_region regions[MAX_PCI_REGIONS];
+       struct pci_region *regions;
        int region_count;
 
        struct pci_config_table *config_table;
-- 
2.28.0