add wifi6 8852be driver

hc

2024-12-19 9370bb92b2d16684ee45cf24e879c93c509162da

 kernel/drivers/gpu/drm/drm_memory.c
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@@ -1,4 +1,4 @@
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-/**
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+/*
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  * \file drm_memory.c
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  * Memory management wrappers for DRM
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  *
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@@ -33,9 +33,16 @@
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  * OTHER DEALINGS IN THE SOFTWARE.
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  */
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-#include <linux/highmem.h>
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 #include <linux/export.h>
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-#include <drm/drmP.h>
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+#include <linux/highmem.h>
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+#include <linux/pci.h>
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+#include <linux/vmalloc.h>
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+#include <xen/xen.h>
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+
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+#include <drm/drm_agpsupport.h>
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+#include <drm/drm_cache.h>
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+#include <drm/drm_device.h>
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+
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 #include "drm_legacy.h"
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 #if IS_ENABLED(CONFIG_AGP)
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@@ -51,7 +58,7 @@
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 #endif
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 static void *agp_remap(unsigned long offset, unsigned long size,
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-		       struct drm_device * dev)
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+		       struct drm_device *dev)
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 {
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 	unsigned long i, num_pages =
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 	    PAGE_ALIGN(size) / PAGE_SIZE;
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@@ -94,26 +101,26 @@
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 }
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 /** Wrapper around agp_free_memory() */
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-void drm_free_agp(struct agp_memory * handle, int pages)
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+void drm_free_agp(struct agp_memory *handle, int pages)
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 {
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 	agp_free_memory(handle);
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 }
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 /** Wrapper around agp_bind_memory() */
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-int drm_bind_agp(struct agp_memory * handle, unsigned int start)
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+int drm_bind_agp(struct agp_memory *handle, unsigned int start)
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 {
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 	return agp_bind_memory(handle, start);
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 }
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 /** Wrapper around agp_unbind_memory() */
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-int drm_unbind_agp(struct agp_memory * handle)
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+int drm_unbind_agp(struct agp_memory *handle)
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 {
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 	return agp_unbind_memory(handle);
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 }
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 #else /*  CONFIG_AGP  */
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 static inline void *agp_remap(unsigned long offset, unsigned long size,
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-			      struct drm_device * dev)
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+			      struct drm_device *dev)
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 {
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 	return NULL;
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 }
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@@ -150,15 +157,34 @@
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 }
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 EXPORT_SYMBOL(drm_legacy_ioremapfree);
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-u64 drm_get_max_iomem(void)
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+bool drm_need_swiotlb(int dma_bits)
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 {
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 	struct resource *tmp;
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 	resource_size_t max_iomem = 0;
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+
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+	/*
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+	 * Xen paravirtual hosts require swiotlb regardless of requested dma
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+	 * transfer size.
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+	 *
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+	 * NOTE: Really, what it requires is use of the dma_alloc_coherent
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+	 *       allocator used in ttm_dma_populate() instead of
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+	 *       ttm_populate_and_map_pages(), which bounce buffers so much in
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+	 *       Xen it leads to swiotlb buffer exhaustion.
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+	 */
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+	if (xen_pv_domain())
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+		return true;
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+
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+	/*
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+	 * Enforce dma_alloc_coherent when memory encryption is active as well
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+	 * for the same reasons as for Xen paravirtual hosts.
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+	 */
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+	if (mem_encrypt_active())
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+		return true;
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 	for (tmp = iomem_resource.child; tmp; tmp = tmp->sibling) {
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 		max_iomem = max(max_iomem,  tmp->end);
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 	}
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-	return max_iomem;
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+	return max_iomem > ((u64)1 << dma_bits);
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 }
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-EXPORT_SYMBOL(drm_get_max_iomem);
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+EXPORT_SYMBOL(drm_need_swiotlb);