Changeset 83fb72e in mainline

Timestamp:

2017-12-20T11:36:13Z (7 years ago)

Author:

Ondřej Hlavatý <aearsis@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

9fd8f14

Parents:

ba2fc2c

git-author:

Ondřej Hlavatý <aearsis@…> (2017-12-20 11:35:57)

git-committer:

Ondřej Hlavatý <aearsis@…> (2017-12-20 11:36:13)

Message:

xhci: allocate all scratchpads in one buffer

Location:

uspace/drv/bus/usb/xhci

Files:

• hc.h (modified) (1 diff)
• scratchpad.c (modified) (3 diffs)

uspace/drv/bus/usb/xhci/hc.h

@@ -71 +71 @@
         dma_buffer_t dcbaa_dma;
         dma_buffer_t scratchpad_array;
-        dma_buffer_t *scratchpad_buffers;
 
         /* Command ring management */

uspace/drv/bus/usb/xhci/scratchpad.c

@@ -37 +37 @@
 #include <usb/debug.h>
 #include "hc.h"
+#include <align.h>
 #include "hw_struct/regs.h"
 #include "scratchpad.h"
@@ -57 +58 @@
                 return EOK;
 
-        if (dma_buffer_alloc(&hc->scratchpad_array, num_bufs * sizeof(uint64_t)))
+        const unsigned array_size = ALIGN_UP(num_bufs * sizeof(uint64_t), PAGE_SIZE);
+        const size_t size = array_size + num_bufs * PAGE_SIZE;
+
+        if (dma_buffer_alloc(&hc->scratchpad_array, size))
                 return ENOMEM;
-        uint64_t *phys_array = hc->scratchpad_array.virt;
+
+        memset(hc->scratchpad_array.virt, 0, size);
+
+        uint64_t phys_begin = hc->scratchpad_array.phys + array_size;
+        uint64_t *array = hc->scratchpad_array.virt;
+
+        for (unsigned i = 0; i < num_bufs; ++i)
+                array[i] = host2xhci(64, phys_begin + i * PAGE_SIZE);
 
         hc->dcbaa[0] = host2xhci(64, hc->scratchpad_array.phys);
-
-        hc->scratchpad_buffers = calloc(num_bufs, sizeof(dma_buffer_t));
-        if (!hc->scratchpad_buffers)
-                goto err_dma;
-
-        for (unsigned i = 0; i < num_bufs; ++i) {
-                dma_buffer_t *cur = &hc->scratchpad_buffers[i];
-                if (dma_buffer_alloc(cur, PAGE_SIZE))
-                        goto err_buffers;
-
-                memset(cur->virt, 0, PAGE_SIZE);
-                phys_array[i] = host2xhci(64, cur->phys);
-        }
-
 
         usb_log_debug2("Allocated %d scratchpad buffers.", num_bufs);
 
         return EOK;
-
-err_buffers:
-        for (unsigned i = 0; i < num_bufs; ++i)
-                dma_buffer_free(&hc->scratchpad_buffers[i]);
-        free(hc->scratchpad_buffers);
-err_dma:
-        hc->dcbaa[0] = 0;
-        dma_buffer_free(&hc->scratchpad_array);
-        return ENOMEM;
 }
 
@@ -100 +88 @@
         hc->dcbaa[0] = 0;
         dma_buffer_free(&hc->scratchpad_array);
-        for (unsigned i = 0; i < num_bufs; ++i)
-                dma_buffer_free(&hc->scratchpad_buffers[i]);
-        free(hc->scratchpad_buffers);
         return;
 }