From 9370bb92b2d16684ee45cf24e879c93c509162da Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Thu, 19 Dec 2024 01:47:39 +0000
Subject: [PATCH] add wifi6 8852be driver
---
kernel/drivers/usb/core/buffer.c | 70 +++++++++++++++++++++++++++-------
1 files changed, 55 insertions(+), 15 deletions(-)
diff --git a/kernel/drivers/usb/core/buffer.c b/kernel/drivers/usb/core/buffer.c
index 77eef8a..be87387 100644
--- a/kernel/drivers/usb/core/buffer.c
+++ b/kernel/drivers/usb/core/buffer.c
@@ -16,6 +16,7 @@
#include <linux/io.h>
#include <linux/dma-mapping.h>
#include <linux/dmapool.h>
+#include <linux/genalloc.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>
@@ -65,9 +66,7 @@
char name[16];
int i, size;
- if (!IS_ENABLED(CONFIG_HAS_DMA) ||
- (!is_device_dma_capable(hcd->self.sysdev) &&
- !(hcd->driver->flags & HCD_LOCAL_MEM)))
+ if (hcd->localmem_pool || !hcd_uses_dma(hcd))
return 0;
for (i = 0; i < HCD_BUFFER_POOLS; i++) {
@@ -101,12 +100,8 @@
return;
for (i = 0; i < HCD_BUFFER_POOLS; i++) {
- struct dma_pool *pool = hcd->pool[i];
-
- if (pool) {
- dma_pool_destroy(pool);
- hcd->pool[i] = NULL;
- }
+ dma_pool_destroy(hcd->pool[i]);
+ hcd->pool[i] = NULL;
}
}
@@ -128,10 +123,11 @@
if (size == 0)
return NULL;
+ if (hcd->localmem_pool)
+ return gen_pool_dma_alloc(hcd->localmem_pool, size, dma);
+
/* some USB hosts just use PIO */
- if (!IS_ENABLED(CONFIG_HAS_DMA) ||
- (!is_device_dma_capable(bus->sysdev) &&
- !(hcd->driver->flags & HCD_LOCAL_MEM))) {
+ if (!hcd_uses_dma(hcd)) {
*dma = ~(dma_addr_t) 0;
return kmalloc(size, mem_flags);
}
@@ -156,9 +152,12 @@
if (!addr)
return;
- if (!IS_ENABLED(CONFIG_HAS_DMA) ||
- (!is_device_dma_capable(bus->sysdev) &&
- !(hcd->driver->flags & HCD_LOCAL_MEM))) {
+ if (hcd->localmem_pool) {
+ gen_pool_free(hcd->localmem_pool, (unsigned long)addr, size);
+ return;
+ }
+
+ if (!hcd_uses_dma(hcd)) {
kfree(addr);
return;
}
@@ -171,3 +170,44 @@
}
dma_free_coherent(hcd->self.sysdev, size, addr, dma);
}
+
+void *hcd_buffer_alloc_pages(struct usb_hcd *hcd,
+ size_t size, gfp_t mem_flags, dma_addr_t *dma)
+{
+ if (size == 0)
+ return NULL;
+
+ if (hcd->localmem_pool)
+ return gen_pool_dma_alloc_align(hcd->localmem_pool,
+ size, dma, PAGE_SIZE);
+
+ /* some USB hosts just use PIO */
+ if (!hcd_uses_dma(hcd)) {
+ *dma = DMA_MAPPING_ERROR;
+ return (void *)__get_free_pages(mem_flags,
+ get_order(size));
+ }
+
+ return dma_alloc_coherent(hcd->self.sysdev,
+ size, dma, mem_flags);
+}
+
+void hcd_buffer_free_pages(struct usb_hcd *hcd,
+ size_t size, void *addr, dma_addr_t dma)
+{
+ if (!addr)
+ return;
+
+ if (hcd->localmem_pool) {
+ gen_pool_free(hcd->localmem_pool,
+ (unsigned long)addr, size);
+ return;
+ }
+
+ if (!hcd_uses_dma(hcd)) {
+ free_pages((unsigned long)addr, get_order(size));
+ return;
+ }
+
+ dma_free_coherent(hcd->self.sysdev, size, addr, dma);
+}
--
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