#include "gt/intel_gt_mcr.h"
#include "gt/intel_gt_regs.h"
+static void _release_bars(struct pci_dev *pdev)
+{
+ int resno;
+
+ for (resno = PCI_STD_RESOURCES; resno < PCI_STD_RESOURCE_END; resno++) {
+ if (pci_resource_len(pdev, resno))
+ pci_release_resource(pdev, resno);
+ }
+}
+
+static void
+_resize_bar(struct drm_i915_private *i915, int resno, resource_size_t size)
+{
+ struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
+ int bar_size = pci_rebar_bytes_to_size(size);
+ int ret;
+
+ _release_bars(pdev);
+
+ ret = pci_resize_resource(pdev, resno, bar_size);
+ if (ret) {
+ drm_info(&i915->drm, "Failed to resize BAR%d to %dM (%pe)\n",
+ resno, 1 << bar_size, ERR_PTR(ret));
+ return;
+ }
+
+ drm_info(&i915->drm, "BAR%d resized to %dM\n", resno, 1 << bar_size);
+}
+
+#define LMEM_BAR_NUM 2
+static void i915_resize_lmem_bar(struct drm_i915_private *i915, resource_size_t lmem_size)
+{
+ struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
+ struct pci_bus *root = pdev->bus;
+ struct resource *root_res;
+ resource_size_t rebar_size;
+ u32 pci_cmd;
+ int i;
+
+ rebar_size = roundup_pow_of_two(pci_resource_len(pdev, LMEM_BAR_NUM));
+
+ if (rebar_size != roundup_pow_of_two(lmem_size))
+ rebar_size = lmem_size;
+ else
+ return;
+
+ /* Find out if root bus contains 64bit memory addressing */
+ while (root->parent)
+ root = root->parent;
+
+ pci_bus_for_each_resource(root, root_res, i) {
+ if (root_res && root_res->flags & (IORESOURCE_MEM | IORESOURCE_MEM_64) &&
+ root_res->start > 0x100000000ull)
+ break;
+ }
+
+ /* pci_resize_resource will fail anyways */
+ if (!root_res) {
+ drm_info(&i915->drm, "Can't resize LMEM BAR - platform support is missing\n");
+ return;
+ }
+
+ /* First disable PCI memory decoding references */
+ pci_read_config_dword(pdev, PCI_COMMAND, &pci_cmd);
+ pci_write_config_dword(pdev, PCI_COMMAND,
+ pci_cmd & ~PCI_COMMAND_MEMORY);
+
+ _resize_bar(i915, LMEM_BAR_NUM, rebar_size);
+
+ pci_assign_unassigned_bus_resources(pdev->bus);
+ pci_write_config_dword(pdev, PCI_COMMAND, pci_cmd);
+}
+
static int
region_lmem_release(struct intel_memory_region *mem)
{
lmem_size = intel_uncore_read64(&i915->uncore, GEN12_GSMBASE);
}
+ i915_resize_lmem_bar(i915, lmem_size);
+
if (i915->params.lmem_size > 0) {
lmem_size = min_t(resource_size_t, lmem_size,
mul_u32_u32(i915->params.lmem_size, SZ_1M));