1 /* $NetBSD: octeon_fpa.c,v 1.8 2020/06/23 05:14:18 simonb Exp $ */ 2 3 /* 4 * Copyright (c) 2007 Internet Initiative Japan, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #undef FPADEBUG 30 31 #include <sys/cdefs.h> 32 __KERNEL_RCSID(0, "$NetBSD: octeon_fpa.c,v 1.8 2020/06/23 05:14:18 simonb Exp $"); 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/types.h> 37 #include <sys/malloc.h> 38 39 #include <sys/bus.h> 40 #include <machine/locore.h> 41 #include <machine/vmparam.h> 42 43 #include <mips/cavium/octeonvar.h> 44 #include <mips/cavium/include/iobusvar.h> 45 #include <mips/cavium/dev/octeon_fpareg.h> 46 #include <mips/cavium/dev/octeon_fpavar.h> 47 48 #ifdef FPADEBUG 49 #define DPRINTF(x) printf x 50 #else 51 #define DPRINTF(x) 52 #endif 53 54 #define _DMA_NSEGS 1 55 #define _DMA_BUFLEN 0x01000000 56 57 /* pool descriptor */ 58 struct octfpa_desc { 59 }; 60 61 struct octfpa_softc { 62 int sc_initialized; 63 64 bus_space_tag_t sc_regt; 65 bus_space_handle_t sc_regh; 66 67 bus_space_tag_t sc_opst; 68 bus_space_handle_t sc_opsh; 69 70 bus_dma_tag_t sc_dmat; 71 72 struct octfpa_desc sc_descs[8]; 73 }; 74 75 void octfpa_bootstrap(struct octeon_config *); 76 void octfpa_reset(void); 77 void octfpa_int_enable(struct octfpa_softc *, int); 78 void octfpa_buf_dma_alloc(struct octfpa_buf *); 79 80 static void octfpa_init(struct octfpa_softc *); 81 #ifdef notyet 82 static uint64_t octfpa_iobdma(struct octfpa_softc *, int, int); 83 #endif 84 85 static struct octfpa_softc octfpa_softc; 86 87 /* ---- global functions */ 88 89 void 90 octfpa_bootstrap(struct octeon_config *mcp) 91 { 92 struct octfpa_softc *sc = &octfpa_softc; 93 94 sc->sc_regt = &mcp->mc_iobus_bust; 95 sc->sc_opst = &mcp->mc_iobus_bust; 96 sc->sc_dmat = &mcp->mc_iobus_dmat; 97 98 octfpa_init(sc); 99 } 100 101 void 102 octfpa_reset(void) 103 { 104 /* XXX */ 105 } 106 107 int 108 octfpa_buf_init(int poolno, size_t size, size_t nelems, struct octfpa_buf **rfb) 109 { 110 struct octfpa_softc *sc = &octfpa_softc; 111 struct octfpa_buf *fb; 112 int nsegs; 113 paddr_t paddr; 114 115 nsegs = 1/* XXX */; 116 fb = malloc(sizeof(*fb) + sizeof(*fb->fb_dma_segs) * nsegs, M_DEVBUF, 117 M_WAITOK | M_ZERO); 118 if (fb == NULL) 119 return 1; 120 fb->fb_poolno = poolno; 121 fb->fb_size = size; 122 fb->fb_nelems = nelems; 123 fb->fb_len = size * nelems; 124 fb->fb_dmat = sc->sc_dmat; 125 fb->fb_dma_segs = (void *)(fb + 1); 126 fb->fb_dma_nsegs = nsegs; 127 128 octfpa_buf_dma_alloc(fb); 129 130 for (paddr = fb->fb_paddr; paddr < fb->fb_paddr + fb->fb_len; 131 paddr += fb->fb_size) 132 octfpa_buf_put_paddr(fb, paddr); 133 134 *rfb = fb; 135 136 return 0; 137 } 138 139 void * 140 octfpa_buf_get(struct octfpa_buf *fb) 141 { 142 paddr_t paddr; 143 vaddr_t addr; 144 145 paddr = octfpa_buf_get_paddr(fb); 146 if (paddr == 0) 147 addr = 0; 148 else 149 addr = fb->fb_addr + (vaddr_t/* XXX */)(paddr - fb->fb_paddr); 150 return (void *)addr; 151 } 152 153 void 154 octfpa_buf_dma_alloc(struct octfpa_buf *fb) 155 { 156 int status; 157 int nsegs; 158 void *va; 159 160 status = bus_dmamap_create(fb->fb_dmat, fb->fb_len, 161 fb->fb_len / PAGE_SIZE, /* # of segments */ 162 fb->fb_len, /* we don't use s/g for FPA buf */ 163 PAGE_SIZE, /* OCTEON hates >PAGE_SIZE boundary */ 164 0, &fb->fb_dmah); 165 if (status != 0) 166 panic("%s failed", "bus_dmamap_create"); 167 168 status = bus_dmamem_alloc(fb->fb_dmat, fb->fb_len, 128, 0, 169 fb->fb_dma_segs, fb->fb_dma_nsegs, &nsegs, 0); 170 if (status != 0 || fb->fb_dma_nsegs != nsegs) 171 panic("%s failed", "bus_dmamem_alloc"); 172 173 status = bus_dmamem_map(fb->fb_dmat, fb->fb_dma_segs, fb->fb_dma_nsegs, 174 fb->fb_len, &va, 0); 175 if (status != 0) 176 panic("%s failed", "bus_dmamem_map"); 177 178 status = bus_dmamap_load(fb->fb_dmat, fb->fb_dmah, va, fb->fb_len, 179 NULL, /* kernel */ 180 0); 181 if (status != 0) 182 panic("%s failed", "bus_dmamap_load"); 183 184 fb->fb_addr = (vaddr_t)va; 185 fb->fb_paddr = fb->fb_dma_segs[0].ds_addr; 186 } 187 188 uint64_t 189 octfpa_query(int poolno) 190 { 191 struct octfpa_softc *sc = &octfpa_softc; 192 193 return bus_space_read_8(sc->sc_regt, sc->sc_regh, 194 FPA_QUE0_AVAILABLE_OFFSET + sizeof(uint64_t) * poolno); 195 } 196 197 /* ---- local functions */ 198 199 static inline void octfpa_init_bus(struct octfpa_softc *); 200 static inline void octfpa_init_bus_space(struct octfpa_softc *); 201 static inline void octfpa_init_regs(struct octfpa_softc *); 202 203 void 204 octfpa_init(struct octfpa_softc *sc) 205 { 206 if (sc->sc_initialized != 0) 207 panic("%s: already initialized", __func__); 208 sc->sc_initialized = 1; 209 210 octfpa_init_bus(sc); 211 octfpa_init_regs(sc); 212 } 213 214 void 215 octfpa_init_bus(struct octfpa_softc *sc) 216 { 217 218 octfpa_init_bus_space(sc); 219 } 220 221 void 222 octfpa_init_bus_space(struct octfpa_softc *sc) 223 { 224 int status; 225 226 status = bus_space_map(sc->sc_regt, FPA_BASE, FPA_SIZE, 0, &sc->sc_regh); 227 if (status != 0) 228 panic("can't map %s space", "register"); 229 230 status = bus_space_map(sc->sc_opst, 231 0x0001180028000000ULL/* XXX */, 0x0200/* XXX */, 0, &sc->sc_opsh); 232 if (status != 0) 233 panic("can't map %s space", "operations"); 234 } 235 236 void 237 octfpa_init_regs(struct octfpa_softc *sc) 238 { 239 240 bus_space_write_8(sc->sc_regt, sc->sc_regh, FPA_CTL_STATUS_OFFSET, 241 FPA_CTL_STATUS_ENB); 242 } 243 244 int 245 octfpa_available_fpa_pool(int *available, int pool_no) { 246 struct octfpa_softc *sc = &octfpa_softc; 247 size_t offset; 248 uint64_t tmp; 249 250 switch (pool_no) { 251 case OCTEON_POOL_NO_PKT: 252 offset = FPA_QUE0_AVAILABLE_OFFSET; 253 break; 254 case OCTEON_POOL_NO_WQE: 255 offset = FPA_QUE1_AVAILABLE_OFFSET; 256 break; 257 case OCTEON_POOL_NO_CMD: 258 offset = FPA_QUE2_AVAILABLE_OFFSET; 259 break; 260 case OCTEON_POOL_NO_SG: 261 offset = FPA_QUE3_AVAILABLE_OFFSET; 262 break; 263 case OCTEON_POOL_NO_XXX_4: 264 offset = FPA_QUE4_AVAILABLE_OFFSET; 265 break; 266 case OCTEON_POOL_NO_XXX_5: 267 offset = FPA_QUE5_AVAILABLE_OFFSET; 268 break; 269 case OCTEON_POOL_NO_XXX_6: 270 offset = FPA_QUE6_AVAILABLE_OFFSET; 271 break; 272 case OCTEON_POOL_NO_DUMP: 273 offset = FPA_QUE7_AVAILABLE_OFFSET; 274 break; 275 default: 276 return EINVAL; 277 } 278 tmp = bus_space_read_8(sc->sc_regt, sc->sc_regh, offset); 279 if (available) { 280 *available = (int)(tmp & FPA_QUEX_AVAILABLE_QUE_SIZ); 281 } 282 283 return 0; 284 } 285