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The actual compression/decompression will only be done in a subsequent patch. Signed-off-by: Shameer Kolothum Reviewed-by: Fabiano Rosas Reviewed-by: Zhangfei Gao Signed-off-by: Fabiano Rosas --- migration/multifd-uadk.c | 209 ++++++++++++++++++++++++++++++++++++++- 1 file changed, 208 insertions(+), 1 deletion(-) diff --git a/migration/multifd-uadk.c b/migration/multifd-uadk.c index c2bb07535b..535411a405 100644 --- a/migration/multifd-uadk.c +++ b/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 = ¶m; + + 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);