add dts config

hc

2023-12-06 08f87f769b595151be1afeff53e144f543faa614

 kernel/drivers/usb/core/buffer.c
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@@ -16,6 +16,7 @@
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 #include <linux/io.h>
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 #include <linux/dma-mapping.h>
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 #include <linux/dmapool.h>
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+#include <linux/genalloc.h>
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 #include <linux/usb.h>
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 #include <linux/usb/hcd.h>
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@@ -65,9 +66,7 @@
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 	char		name[16];
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 	int		i, size;
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-	if (!IS_ENABLED(CONFIG_HAS_DMA) ||
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-	    (!is_device_dma_capable(hcd->self.sysdev) &&
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-	     !(hcd->driver->flags & HCD_LOCAL_MEM)))
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+	if (hcd->localmem_pool || !hcd_uses_dma(hcd))
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 		return 0;
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 	for (i = 0; i < HCD_BUFFER_POOLS; i++) {
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@@ -101,12 +100,8 @@
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 		return;
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 	for (i = 0; i < HCD_BUFFER_POOLS; i++) {
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-		struct dma_pool *pool = hcd->pool[i];
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-
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-		if (pool) {
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-			dma_pool_destroy(pool);
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-			hcd->pool[i] = NULL;
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-		}
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+		dma_pool_destroy(hcd->pool[i]);
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+		hcd->pool[i] = NULL;
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 	}
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 }
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@@ -128,10 +123,11 @@
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 	if (size == 0)
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 		return NULL;
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+	if (hcd->localmem_pool)
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+		return gen_pool_dma_alloc(hcd->localmem_pool, size, dma);
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+
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 	/* some USB hosts just use PIO */
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-	if (!IS_ENABLED(CONFIG_HAS_DMA) ||
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-	    (!is_device_dma_capable(bus->sysdev) &&
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-	     !(hcd->driver->flags & HCD_LOCAL_MEM))) {
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+	if (!hcd_uses_dma(hcd)) {
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 		*dma = ~(dma_addr_t) 0;
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 		return kmalloc(size, mem_flags);
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 	}
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@@ -156,9 +152,12 @@
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 	if (!addr)
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 		return;
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-	if (!IS_ENABLED(CONFIG_HAS_DMA) ||
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-	    (!is_device_dma_capable(bus->sysdev) &&
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-	     !(hcd->driver->flags & HCD_LOCAL_MEM))) {
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+	if (hcd->localmem_pool) {
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+		gen_pool_free(hcd->localmem_pool, (unsigned long)addr, size);
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+		return;
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+	}
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+
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+	if (!hcd_uses_dma(hcd)) {
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 		kfree(addr);
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 		return;
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 	}