diff options
| -rw-r--r-- | migration/multifd-qpl.c | 328 |
1 files changed, 327 insertions, 1 deletions
diff --git a/migration/multifd-qpl.c b/migration/multifd-qpl.c index 056a68a060..6791a204d5 100644 --- a/migration/multifd-qpl.c +++ b/migration/multifd-qpl.c @@ -9,12 +9,338 @@ * This work is licensed under the terms of the GNU GPL, version 2 or later. * See the COPYING file in the top-level directory. */ + #include "qemu/osdep.h" #include "qemu/module.h" +#include "qapi/error.h" +#include "multifd.h" +#include "qpl/qpl.h" + +typedef struct { + /* the QPL hardware path job */ + qpl_job *job; + /* indicates if fallback to software path is required */ + bool fallback_sw_path; + /* output data from the software path */ + uint8_t *sw_output; + /* output data length from the software path */ + uint32_t sw_output_len; +} QplHwJob; + +typedef struct { + /* array of hardware jobs, the number of jobs equals the number pages */ + QplHwJob *hw_jobs; + /* the QPL software job for the slow path and software fallback */ + qpl_job *sw_job; + /* the number of pages that the QPL needs to process at one time */ + uint32_t page_num; + /* array of compressed page buffers */ + uint8_t *zbuf; + /* array of compressed page lengths */ + uint32_t *zlen; + /* the status of the hardware device */ + bool hw_avail; +} QplData; + +/** + * check_hw_avail: check if IAA hardware is available + * + * If the IAA hardware does not exist or is unavailable, + * the QPL hardware job initialization will fail. + * + * Returns true if IAA hardware is available, otherwise false. + * + * @job_size: indicates the hardware job size if hardware is available + */ +static bool check_hw_avail(uint32_t *job_size) +{ + qpl_path_t path = qpl_path_hardware; + uint32_t size = 0; + qpl_job *job; + + if (qpl_get_job_size(path, &size) != QPL_STS_OK) { + return false; + } + assert(size > 0); + job = g_malloc0(size); + if (qpl_init_job(path, job) != QPL_STS_OK) { + g_free(job); + return false; + } + g_free(job); + *job_size = size; + return true; +} + +/** + * multifd_qpl_free_sw_job: clean up software job + * + * Free the software job resources. + * + * @qpl: pointer to the QplData structure + */ +static void multifd_qpl_free_sw_job(QplData *qpl) +{ + assert(qpl); + if (qpl->sw_job) { + qpl_fini_job(qpl->sw_job); + g_free(qpl->sw_job); + qpl->sw_job = NULL; + } +} + +/** + * multifd_qpl_free_jobs: clean up hardware jobs + * + * Free all hardware job resources. + * + * @qpl: pointer to the QplData structure + */ +static void multifd_qpl_free_hw_job(QplData *qpl) +{ + assert(qpl); + if (qpl->hw_jobs) { + for (int i = 0; i < qpl->page_num; i++) { + qpl_fini_job(qpl->hw_jobs[i].job); + g_free(qpl->hw_jobs[i].job); + qpl->hw_jobs[i].job = NULL; + } + g_free(qpl->hw_jobs); + qpl->hw_jobs = NULL; + } +} + +/** + * multifd_qpl_init_sw_job: initialize a software job + * + * Use the QPL software path to initialize a job + * + * @qpl: pointer to the QplData structure + * @errp: pointer to an error + */ +static int multifd_qpl_init_sw_job(QplData *qpl, Error **errp) +{ + qpl_path_t path = qpl_path_software; + uint32_t size = 0; + qpl_job *job = NULL; + qpl_status status; + + status = qpl_get_job_size(path, &size); + if (status != QPL_STS_OK) { + error_setg(errp, "qpl_get_job_size failed with error %d", status); + return -1; + } + job = g_malloc0(size); + status = qpl_init_job(path, job); + if (status != QPL_STS_OK) { + error_setg(errp, "qpl_init_job failed with error %d", status); + g_free(job); + return -1; + } + qpl->sw_job = job; + return 0; +} + +/** + * multifd_qpl_init_jobs: initialize hardware jobs + * + * Use the QPL hardware path to initialize jobs + * + * @qpl: pointer to the QplData structure + * @size: the size of QPL hardware path job + * @errp: pointer to an error + */ +static void multifd_qpl_init_hw_job(QplData *qpl, uint32_t size, Error **errp) +{ + qpl_path_t path = qpl_path_hardware; + qpl_job *job = NULL; + qpl_status status; + + qpl->hw_jobs = g_new0(QplHwJob, qpl->page_num); + for (int i = 0; i < qpl->page_num; i++) { + job = g_malloc0(size); + status = qpl_init_job(path, job); + /* the job initialization should succeed after check_hw_avail */ + assert(status == QPL_STS_OK); + qpl->hw_jobs[i].job = job; + } +} + +/** + * multifd_qpl_init: initialize QplData structure + * + * Allocate and initialize a QplData structure + * + * Returns a QplData pointer on success or NULL on error + * + * @num: the number of pages + * @size: the page size + * @errp: pointer to an error + */ +static QplData *multifd_qpl_init(uint32_t num, uint32_t size, Error **errp) +{ + uint32_t job_size = 0; + QplData *qpl; + + qpl = g_new0(QplData, 1); + qpl->page_num = num; + if (multifd_qpl_init_sw_job(qpl, errp) != 0) { + g_free(qpl); + return NULL; + } + qpl->hw_avail = check_hw_avail(&job_size); + if (qpl->hw_avail) { + multifd_qpl_init_hw_job(qpl, job_size, errp); + } + qpl->zbuf = g_malloc0(size * num); + qpl->zlen = g_new0(uint32_t, num); + return qpl; +} + +/** + * multifd_qpl_deinit: clean up QplData structure + * + * Free jobs, buffers and the QplData structure + * + * @qpl: pointer to the QplData structure + */ +static void multifd_qpl_deinit(QplData *qpl) +{ + if (qpl) { + multifd_qpl_free_sw_job(qpl); + multifd_qpl_free_hw_job(qpl); + g_free(qpl->zbuf); + g_free(qpl->zlen); + g_free(qpl); + } +} + +/** + * multifd_qpl_send_setup: set up send side + * + * Set up the channel with QPL compression. + * + * Returns 0 on success or -1 on error + * + * @p: Params for the channel being used + * @errp: pointer to an error + */ +static int multifd_qpl_send_setup(MultiFDSendParams *p, Error **errp) +{ + QplData *qpl; + + qpl = multifd_qpl_init(p->page_count, p->page_size, errp); + if (!qpl) { + return -1; + } + p->compress_data = qpl; + + /* + * the 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_qpl_send_cleanup: clean up send side + * + * Close the channel and free memory. + * + * @p: Params for the channel being used + * @errp: pointer to an error + */ +static void multifd_qpl_send_cleanup(MultiFDSendParams *p, Error **errp) +{ + multifd_qpl_deinit(p->compress_data); + p->compress_data = NULL; + g_free(p->iov); + p->iov = NULL; +} + +/** + * multifd_qpl_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 on success or -1 on error + * + * @p: Params for the channel being used + * @errp: pointer to an error + */ +static int multifd_qpl_send_prepare(MultiFDSendParams *p, Error **errp) +{ + /* Implement in next patch */ + return -1; +} + +/** + * multifd_qpl_recv_setup: set up receive side + * + * Create the compressed channel and buffer. + * + * Returns 0 on success or -1 on error + * + * @p: Params for the channel being used + * @errp: pointer to an error + */ +static int multifd_qpl_recv_setup(MultiFDRecvParams *p, Error **errp) +{ + QplData *qpl; + + qpl = multifd_qpl_init(p->page_count, p->page_size, errp); + if (!qpl) { + return -1; + } + p->compress_data = qpl; + return 0; +} + +/** + * multifd_qpl_recv_cleanup: set up receive side + * + * Close the channel and free memory. + * + * @p: Params for the channel being used + */ +static void multifd_qpl_recv_cleanup(MultiFDRecvParams *p) +{ + multifd_qpl_deinit(p->compress_data); + p->compress_data = NULL; +} + +/** + * multifd_qpl_recv: read the data from the channel into actual pages + * + * Read the compressed buffer, and uncompress it into the actual + * pages. + * + * Returns 0 on success or -1 on error + * + * @p: Params for the channel being used + * @errp: pointer to an error + */ +static int multifd_qpl_recv(MultiFDRecvParams *p, Error **errp) +{ + /* Implement in next patch */ + return -1; +} + +static MultiFDMethods multifd_qpl_ops = { + .send_setup = multifd_qpl_send_setup, + .send_cleanup = multifd_qpl_send_cleanup, + .send_prepare = multifd_qpl_send_prepare, + .recv_setup = multifd_qpl_recv_setup, + .recv_cleanup = multifd_qpl_recv_cleanup, + .recv = multifd_qpl_recv, +}; static void multifd_qpl_register(void) { - /* noop */ + multifd_register_ops(MULTIFD_COMPRESSION_QPL, &multifd_qpl_ops); } migration_init(multifd_qpl_register); |