1231437Sluigi/*- 2252869Sdelphij * Copyright (C) 2013 Emulex 3231437Sluigi * All rights reserved. 4231437Sluigi * 5231437Sluigi * Redistribution and use in source and binary forms, with or without 6231437Sluigi * modification, are permitted provided that the following conditions are met: 7231437Sluigi * 8231437Sluigi * 1. Redistributions of source code must retain the above copyright notice, 9231437Sluigi * this list of conditions and the following disclaimer. 10231437Sluigi * 11231437Sluigi * 2. Redistributions in binary form must reproduce the above copyright 12231437Sluigi * notice, this list of conditions and the following disclaimer in the 13231437Sluigi * documentation and/or other materials provided with the distribution. 14231437Sluigi * 15231437Sluigi * 3. Neither the name of the Emulex Corporation nor the names of its 16231437Sluigi * contributors may be used to endorse or promote products derived from 17231437Sluigi * this software without specific prior written permission. 18231437Sluigi * 19231437Sluigi * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 20231437Sluigi * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21231437Sluigi * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22231437Sluigi * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 23231437Sluigi * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24231437Sluigi * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25231437Sluigi * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26231437Sluigi * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27231437Sluigi * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28231437Sluigi * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29231437Sluigi * POSSIBILITY OF SUCH DAMAGE. 30231437Sluigi * 31231437Sluigi * Contact Information: 32231437Sluigi * freebsd-drivers@emulex.com 33231437Sluigi * 34231437Sluigi * Emulex 35231437Sluigi * 3333 Susan Street 36231437Sluigi * Costa Mesa, CA 92626 37231437Sluigi */ 38231437Sluigi 39231437Sluigi/* $FreeBSD$ */ 40231437Sluigi 41231437Sluigi#include "oce_if.h" 42231437Sluigi 43231437Sluigistatic void oce_dma_map_ring(void *arg, 44231437Sluigi bus_dma_segment_t *segs, 45231437Sluigi int nseg, 46231437Sluigi int error); 47231437Sluigi 48231437Sluigi/** 49231437Sluigi * @brief Allocate DMA memory 50231437Sluigi * @param sc software handle to the device 51231437Sluigi * @param size bus size 52231437Sluigi * @param dma dma memory area 53231437Sluigi * @param flags creation flags 54231437Sluigi * @returns 0 on success, error otherwize 55231437Sluigi */ 56231437Sluigiint 57231437Sluigioce_dma_alloc(POCE_SOFTC sc, bus_size_t size, POCE_DMA_MEM dma, int flags) 58231437Sluigi{ 59231437Sluigi int rc; 60231437Sluigi 61231437Sluigi 62231437Sluigi memset(dma, 0, sizeof(OCE_DMA_MEM)); 63231437Sluigi 64231437Sluigi rc = bus_dma_tag_create(bus_get_dma_tag(sc->dev), 65231437Sluigi 8, 0, 66231437Sluigi BUS_SPACE_MAXADDR, 67231437Sluigi BUS_SPACE_MAXADDR, 68231437Sluigi NULL, NULL, 69231437Sluigi size, 1, size, 0, NULL, NULL, &dma->tag); 70231437Sluigi 71231437Sluigi if (rc == 0) { 72231437Sluigi rc = bus_dmamem_alloc(dma->tag, 73231437Sluigi &dma->ptr, 74247880Sdelphij BUS_DMA_NOWAIT | BUS_DMA_COHERENT | 75247880Sdelphij BUS_DMA_ZERO, 76231437Sluigi &dma->map); 77231437Sluigi } 78231437Sluigi 79231437Sluigi dma->paddr = 0; 80231437Sluigi if (rc == 0) { 81231437Sluigi rc = bus_dmamap_load(dma->tag, 82231437Sluigi dma->map, 83231437Sluigi dma->ptr, 84231437Sluigi size, 85231437Sluigi oce_dma_map_addr, 86231437Sluigi &dma->paddr, flags | BUS_DMA_NOWAIT); 87231437Sluigi if (dma->paddr == 0) 88231437Sluigi rc = ENXIO; 89231437Sluigi } 90231437Sluigi 91231437Sluigi if (rc != 0) 92231437Sluigi oce_dma_free(sc, dma); 93231437Sluigi 94231437Sluigi return rc; 95231437Sluigi} 96231437Sluigi 97231437Sluigi/** 98231437Sluigi * @brief Free DMA memory 99231437Sluigi * @param sc software handle to the device 100231437Sluigi * @param dma dma area to free 101231437Sluigi */ 102231437Sluigivoid 103231437Sluigioce_dma_free(POCE_SOFTC sc, POCE_DMA_MEM dma) 104231437Sluigi{ 105231437Sluigi if (dma->tag == NULL) 106231437Sluigi return; 107231437Sluigi 108267580Sjhb if (dma->paddr != 0) { 109231437Sluigi bus_dmamap_sync(dma->tag, dma->map, 110231437Sluigi BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 111231437Sluigi bus_dmamap_unload(dma->tag, dma->map); 112267580Sjhb dma->paddr = 0; 113231437Sluigi } 114231437Sluigi 115231437Sluigi if (dma->ptr != NULL) { 116231437Sluigi bus_dmamem_free(dma->tag, dma->ptr, dma->map); 117231437Sluigi dma->ptr = NULL; 118231437Sluigi } 119231437Sluigi 120231437Sluigi bus_dma_tag_destroy(dma->tag); 121231437Sluigi dma->tag = NULL; 122231437Sluigi 123231437Sluigi return; 124231437Sluigi} 125231437Sluigi 126231437Sluigi 127231437Sluigi 128231437Sluigi/** 129231437Sluigi * @brief Map DMA memory segment addresses 130231437Sluigi * @param arg physical address pointer 131231437Sluigi * @param segs dma memory segments 132231437Sluigi * @param nseg number of dma memory segments 133231437Sluigi * @param error if error, zeroes the physical address 134231437Sluigi */ 135231437Sluigivoid 136231437Sluigioce_dma_map_addr(void *arg, bus_dma_segment_t * segs, int nseg, int error) 137231437Sluigi{ 138231437Sluigi bus_addr_t *paddr = arg; 139231437Sluigi 140231437Sluigi if (error) 141231437Sluigi *paddr = 0; 142231437Sluigi else 143231437Sluigi *paddr = segs->ds_addr; 144231437Sluigi} 145231437Sluigi 146231437Sluigi 147231437Sluigi 148231437Sluigi/** 149231437Sluigi * @brief Destroy a ring buffer 150231437Sluigi * @param sc software handle to the device 151231437Sluigi * @param ring ring buffer 152231437Sluigi */ 153231437Sluigi 154231437Sluigivoid 155231437Sluigioce_destroy_ring_buffer(POCE_SOFTC sc, oce_ring_buffer_t *ring) 156231437Sluigi{ 157231437Sluigi oce_dma_free(sc, &ring->dma); 158231437Sluigi free(ring, M_DEVBUF); 159231437Sluigi} 160231437Sluigi 161231437Sluigi 162231437Sluigi 163231437Sluigioce_ring_buffer_t * 164231437Sluigioce_create_ring_buffer(POCE_SOFTC sc, 165231437Sluigi uint32_t q_len, uint32_t item_size) 166231437Sluigi{ 167231437Sluigi uint32_t size = q_len * item_size; 168231437Sluigi int rc; 169231437Sluigi oce_ring_buffer_t *ring; 170231437Sluigi 171231437Sluigi 172231437Sluigi ring = malloc(sizeof(oce_ring_buffer_t), M_DEVBUF, M_NOWAIT | M_ZERO); 173231437Sluigi if (ring == NULL) 174231437Sluigi return NULL; 175231437Sluigi 176231437Sluigi ring->item_size = item_size; 177231437Sluigi ring->num_items = q_len; 178231437Sluigi 179231437Sluigi rc = bus_dma_tag_create(bus_get_dma_tag(sc->dev), 180231437Sluigi 4096, 0, 181231437Sluigi BUS_SPACE_MAXADDR, 182231437Sluigi BUS_SPACE_MAXADDR, 183231437Sluigi NULL, NULL, 184231437Sluigi size, 8, 4096, 0, NULL, NULL, &ring->dma.tag); 185231437Sluigi if (rc) 186231437Sluigi goto fail; 187231437Sluigi 188231437Sluigi 189231437Sluigi rc = bus_dmamem_alloc(ring->dma.tag, 190231437Sluigi &ring->dma.ptr, 191231437Sluigi BUS_DMA_NOWAIT | BUS_DMA_COHERENT, 192231437Sluigi &ring->dma.map); 193231437Sluigi if (rc) 194231437Sluigi goto fail; 195231437Sluigi 196231437Sluigi bzero(ring->dma.ptr, size); 197231437Sluigi bus_dmamap_sync(ring->dma.tag, ring->dma.map, 198231437Sluigi BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 199231437Sluigi ring->dma.paddr = 0; 200231437Sluigi 201231437Sluigi return ring; 202231437Sluigi 203231437Sluigifail: 204231437Sluigi oce_dma_free(sc, &ring->dma); 205231437Sluigi free(ring, M_DEVBUF); 206231437Sluigi ring = NULL; 207231437Sluigi return NULL; 208231437Sluigi} 209231437Sluigi 210231437Sluigi 211231437Sluigi 212231437Sluigistruct _oce_dmamap_paddr_table { 213231437Sluigi uint32_t max_entries; 214231437Sluigi uint32_t num_entries; 215231437Sluigi struct phys_addr *paddrs; 216231437Sluigi}; 217231437Sluigi 218231437Sluigi 219231437Sluigi 220231437Sluigi/** 221231437Sluigi * @brief Map ring buffer 222231437Sluigi * @param arg dma map phyical address table pointer 223231437Sluigi * @param segs dma memory segments 224231437Sluigi * @param nseg number of dma memory segments 225231437Sluigi * @param error maps only if error is 0 226231437Sluigi */ 227231437Sluigistatic void 228231437Sluigioce_dma_map_ring(void *arg, bus_dma_segment_t * segs, int nseg, int error) 229231437Sluigi{ 230231437Sluigi int i; 231231437Sluigi struct _oce_dmamap_paddr_table *dpt = 232231437Sluigi (struct _oce_dmamap_paddr_table *)arg; 233231437Sluigi 234231437Sluigi if (error == 0) { 235231437Sluigi if (nseg <= dpt->max_entries) { 236231437Sluigi for (i = 0; i < nseg; i++) { 237231437Sluigi dpt->paddrs[i].lo = ADDR_LO(segs[i].ds_addr); 238231437Sluigi dpt->paddrs[i].hi = ADDR_HI(segs[i].ds_addr); 239231437Sluigi } 240231437Sluigi dpt->num_entries = nseg; 241231437Sluigi } 242231437Sluigi } 243231437Sluigi} 244231437Sluigi 245231437Sluigi 246231437Sluigi 247231437Sluigi/** 248231437Sluigi * @brief Load bus dma map for a ring buffer 249231437Sluigi * @param ring ring buffer pointer 250231437Sluigi * @param pa_list physical address list 251231437Sluigi * @returns number entries 252231437Sluigi */ 253231437Sluigiuint32_t 254231437Sluigioce_page_list(oce_ring_buffer_t *ring, struct phys_addr *pa_list) 255231437Sluigi{ 256231437Sluigi struct _oce_dmamap_paddr_table dpt; 257231437Sluigi 258231437Sluigi dpt.max_entries = 8; 259231437Sluigi dpt.num_entries = 0; 260231437Sluigi dpt.paddrs = pa_list; 261231437Sluigi 262231437Sluigi bus_dmamap_load(ring->dma.tag, 263231437Sluigi ring->dma.map, 264231437Sluigi ring->dma.ptr, 265231437Sluigi ring->item_size * ring->num_items, 266231437Sluigi oce_dma_map_ring, &dpt, BUS_DMA_NOWAIT); 267231437Sluigi 268231437Sluigi return dpt.num_entries; 269231437Sluigi} 270