migration/multifd: Add UADK initialization

Initialize UADK session and allocate buffers required. The actual
compression/decompression will only be done in a subsequent patch.

Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Signed-off-by: Fabiano Rosas <farosas@suse.de>

migration/multifd-uadk.c

@@ -12,9 +12,216 @@
 
 #include "qemu/osdep.h"
 #include "qemu/module.h"
+#include "qapi/error.h"
+#include "migration.h"
+#include "multifd.h"
+#include "options.h"
+#include "uadk/wd_comp.h"
+#include "uadk/wd_sched.h"
+
+struct wd_data {
+    handle_t handle;
+    uint8_t *buf;
+    uint32_t *buf_hdr;
+};
+
+static bool uadk_hw_init(void)
+{
+    char alg[] = "zlib";
+    int ret;
+
+    ret = wd_comp_init2(alg, SCHED_POLICY_RR, TASK_HW);
+    if (ret && ret != -WD_EEXIST) {
+        return false;
+    } else {
+        return true;
+    }
+}
+
+static struct wd_data *multifd_uadk_init_sess(uint32_t count,
+                                              uint32_t page_size,
+                                              bool compress, Error **errp)
+{
+    struct wd_comp_sess_setup ss = {0};
+    struct sched_params param = {0};
+    uint32_t size = count * page_size;
+    struct wd_data *wd;
+
+    if (!uadk_hw_init()) {
+        error_setg(errp, "multifd: UADK hardware not available");
+        return NULL;
+    }
+
+    wd = g_new0(struct wd_data, 1);
+    ss.alg_type = WD_ZLIB;
+    if (compress) {
+        ss.op_type = WD_DIR_COMPRESS;
+        /* Add an additional page for handling output > input */
+        size += page_size;
+    } else {
+        ss.op_type = WD_DIR_DECOMPRESS;
+    }
+
+    /* We use default level 1 compression and 4K window size */
+    param.type = ss.op_type;
+    ss.sched_param = &param;
+
+    wd->handle = wd_comp_alloc_sess(&ss);
+    if (!wd->handle) {
+        error_setg(errp, "multifd: failed wd_comp_alloc_sess");
+        goto out;
+    }
+
+    wd->buf = g_try_malloc(size);
+    if (!wd->buf) {
+        error_setg(errp, "multifd: out of mem for uadk buf");
+        goto out_free_sess;
+    }
+    wd->buf_hdr = g_new0(uint32_t, count);
+    return wd;
+
+out_free_sess:
+    wd_comp_free_sess(wd->handle);
+out:
+    wd_comp_uninit2();
+    g_free(wd);
+    return NULL;
+}
+
+static void multifd_uadk_uninit_sess(struct wd_data *wd)
+{
+    wd_comp_free_sess(wd->handle);
+    wd_comp_uninit2();
+    g_free(wd->buf);
+    g_free(wd->buf_hdr);
+    g_free(wd);
+}
+
+/**
+ * multifd_uadk_send_setup: setup send side
+ *
+ * Returns 0 for success or -1 for error
+ *
+ * @p: Params for the channel that we are using
+ * @errp: pointer to an error
+ */
+static int multifd_uadk_send_setup(MultiFDSendParams *p, Error **errp)
+{
+    struct wd_data *wd;
+
+    wd = multifd_uadk_init_sess(p->page_count, p->page_size, true, errp);
+    if (!wd) {
+        return -1;
+    }
+
+    p->compress_data = wd;
+    assert(p->iov == NULL);
+    /*
+     * Each page will be compressed independently and sent using an IOV. The
+     * additional two IOVs are used to store packet header and compressed data
+     * length
+     */
+
+    p->iov = g_new0(struct iovec, p->page_count + 2);
+    return 0;
+}
+
+/**
+ * multifd_uadk_send_cleanup: cleanup send side
+ *
+ * Close the channel and return memory.
+ *
+ * @p: Params for the channel that we are using
+ * @errp: pointer to an error
+ */
+static void multifd_uadk_send_cleanup(MultiFDSendParams *p, Error **errp)
+{
+    struct wd_data *wd = p->compress_data;
+
+    multifd_uadk_uninit_sess(wd);
+    p->compress_data = NULL;
+}
+
+/**
+ * multifd_uadk_send_prepare: prepare data to be able to send
+ *
+ * Create a compressed buffer with all the pages that we are going to
+ * send.
+ *
+ * Returns 0 for success or -1 for error
+ *
+ * @p: Params for the channel that we are using
+ * @errp: pointer to an error
+ */
+static int multifd_uadk_send_prepare(MultiFDSendParams *p, Error **errp)
+{
+    return -1;
+}
+
+/**
+ * multifd_uadk_recv_setup: setup receive side
+ *
+ * Create the compressed channel and buffer.
+ *
+ * Returns 0 for success or -1 for error
+ *
+ * @p: Params for the channel that we are using
+ * @errp: pointer to an error
+ */
+static int multifd_uadk_recv_setup(MultiFDRecvParams *p, Error **errp)
+{
+    struct wd_data *wd;
+
+    wd = multifd_uadk_init_sess(p->page_count, p->page_size, false, errp);
+    if (!wd) {
+        return -1;
+    }
+    p->compress_data = wd;
+    return 0;
+}
+
+/**
+ * multifd_uadk_recv_cleanup: cleanup receive side
+ *
+ * Close the channel and return memory.
+ *
+ * @p: Params for the channel that we are using
+ */
+static void multifd_uadk_recv_cleanup(MultiFDRecvParams *p)
+{
+    struct wd_data *wd = p->compress_data;
+
+    multifd_uadk_uninit_sess(wd);
+    p->compress_data = NULL;
+}
+
+/**
+ * multifd_uadk_recv: read the data from the channel into actual pages
+ *
+ * Read the compressed buffer, and uncompress it into the actual
+ * pages.
+ *
+ * Returns 0 for success or -1 for error
+ *
+ * @p: Params for the channel that we are using
+ * @errp: pointer to an error
+ */
+static int multifd_uadk_recv(MultiFDRecvParams *p, Error **errp)
+{
+    return -1;
+}
+
+static MultiFDMethods multifd_uadk_ops = {
+    .send_setup = multifd_uadk_send_setup,
+    .send_cleanup = multifd_uadk_send_cleanup,
+    .send_prepare = multifd_uadk_send_prepare,
+    .recv_setup = multifd_uadk_recv_setup,
+    .recv_cleanup = multifd_uadk_recv_cleanup,
+    .recv = multifd_uadk_recv,
+};
 
 static void multifd_uadk_register(void)
 {
-    /* noop for now */
+    multifd_register_ops(MULTIFD_COMPRESSION_UADK, &multifd_uadk_ops);
 }
 migration_init(multifd_uadk_register);