Date: Wed, 31 Aug 2016 23:23:46 +0000 (UTC) From: Navdeep Parhar <np@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r305166 - in head/sys/dev/cxgbe: cxgbei tom Message-ID: <201608312323.u7VNNkZS063197@repo.freebsd.org>
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Author: np Date: Wed Aug 31 23:23:46 2016 New Revision: 305166 URL: https://svnweb.freebsd.org/changeset/base/305166 Log: cxgbe/t4_tom: Add general purpose routines to deal with page pod regions and allocations within them. Switch to these routines to manage the TOE DDP region. Sponsored by: Chelsio Communications Modified: head/sys/dev/cxgbe/cxgbei/cxgbei.c head/sys/dev/cxgbe/tom/t4_ddp.c head/sys/dev/cxgbe/tom/t4_tom.c head/sys/dev/cxgbe/tom/t4_tom.h Modified: head/sys/dev/cxgbe/cxgbei/cxgbei.c ============================================================================== --- head/sys/dev/cxgbe/cxgbei/cxgbei.c Wed Aug 31 22:18:50 2016 (r305165) +++ head/sys/dev/cxgbe/cxgbei/cxgbei.c Wed Aug 31 23:23:46 2016 (r305166) @@ -157,7 +157,6 @@ ulp_mem_io_set_hdr(struct adapter *sc, i idata->len = htonl(dlen); } -#define PPOD_SIZE sizeof(struct pagepod) #define ULPMEM_IDATA_MAX_NPPODS 1 /* 256/PPOD_SIZE */ #define PCIE_MEMWIN_MAX_NPPODS 16 /* 1024/PPOD_SIZE */ Modified: head/sys/dev/cxgbe/tom/t4_ddp.c ============================================================================== --- head/sys/dev/cxgbe/tom/t4_ddp.c Wed Aug 31 22:18:50 2016 (r305165) +++ head/sys/dev/cxgbe/tom/t4_ddp.c Wed Aug 31 23:23:46 2016 (r305166) @@ -85,44 +85,11 @@ static void ddp_complete_all(struct toep static void t4_aio_cancel_active(struct kaiocb *job); static void t4_aio_cancel_queued(struct kaiocb *job); -#define PPOD_SZ(n) ((n) * sizeof(struct pagepod)) -#define PPOD_SIZE (PPOD_SZ(1)) - static TAILQ_HEAD(, pageset) ddp_orphan_pagesets; static struct mtx ddp_orphan_pagesets_lock; static struct task ddp_orphan_task; #define MAX_DDP_BUFFER_SIZE (M_TCB_RX_DDP_BUF0_LEN) -static int -alloc_ppods(struct tom_data *td, int n, u_int *ppod_addr) -{ - vmem_addr_t v; - int rc; - - MPASS(n > 0); - - rc = vmem_alloc(td->ppod_arena, PPOD_SZ(n), M_NOWAIT | M_FIRSTFIT, &v); - *ppod_addr = (u_int)v; - - return (rc); -} - -static void -free_ppods(struct tom_data *td, u_int ppod_addr, int n) -{ - - MPASS(n > 0); - - vmem_free(td->ppod_arena, (vmem_addr_t)ppod_addr, PPOD_SZ(n)); -} - -static inline int -pages_to_nppods(int npages, int ddp_pgsz) -{ - int nsegs = npages * PAGE_SIZE / ddp_pgsz; - - return (howmany(nsegs, PPOD_PAGES)); -} /* * A page set holds information about a buffer used for DDP. The page @@ -147,8 +114,8 @@ free_pageset(struct tom_data *td, struct vm_page_t p; int i; - if (ps->nppods > 0) - free_ppods(td, ps->ppod_addr, ps->nppods); + if (ps->prsv.prsv_nppods > 0) + t4_free_page_pods(&ps->prsv); if (ps->flags & PS_WIRED) { for (i = 0; i < ps->npages; i++) { @@ -483,7 +450,7 @@ mk_update_tcb_for_ddp(struct adapter *sc ulpmc = mk_set_tcb_field_ulp(ulpmc, toep, W_TCB_RX_DDP_BUF0_TAG + db_idx, V_TCB_RX_DDP_BUF0_TAG(M_TCB_RX_DDP_BUF0_TAG), - V_TCB_RX_DDP_BUF0_TAG(ps->tag)); + V_TCB_RX_DDP_BUF0_TAG(ps->prsv.prsv_tag)); /* Update the current offset in the DDP buffer and its total length */ if (db_idx == 0) @@ -879,13 +846,52 @@ calculate_hcf(int n1, int n2) return (b); } +static inline int +pages_to_nppods(int npages, int ddp_page_shift) +{ + + MPASS(ddp_page_shift >= PAGE_SHIFT); + + return (howmany(npages >> (ddp_page_shift - PAGE_SHIFT), PPOD_PAGES)); +} + static int -alloc_page_pods(struct tom_data *td, struct pageset *ps) +alloc_page_pods(struct ppod_region *pr, u_int nppods, u_int pgsz_idx, + struct ppod_reservation *prsv) { - int i, hcf, seglen, idx, ppod, nppods; - u_int ppod_addr; + vmem_addr_t addr; /* relative to start of region */ + + if (vmem_alloc(pr->pr_arena, PPOD_SZ(nppods), M_NOWAIT | M_FIRSTFIT, + &addr) != 0) + return (ENOMEM); + + CTR5(KTR_CXGBE, "%-17s arena %p, addr 0x%08x, nppods %d, pgsz %d", + __func__, pr->pr_arena, (uint32_t)addr & pr->pr_tag_mask, + nppods, 1 << pr->pr_page_shift[pgsz_idx]); + + /* + * The hardware tagmask includes an extra invalid bit but the arena was + * seeded with valid values only. An allocation out of this arena will + * fit inside the tagmask but won't have the invalid bit set. + */ + MPASS((addr & pr->pr_tag_mask) == addr); + MPASS((addr & pr->pr_invalid_bit) == 0); + + prsv->prsv_pr = pr; + prsv->prsv_tag = V_PPOD_PGSZ(pgsz_idx) | addr; + prsv->prsv_nppods = nppods; + + return (0); +} + +int +t4_alloc_page_pods_for_ps(struct ppod_region *pr, struct pageset *ps) +{ + int i, hcf, seglen, idx, nppods; + struct ppod_reservation *prsv = &ps->prsv; - KASSERT(ps->nppods == 0, ("%s: page pods already allocated", __func__)); + KASSERT(prsv->prsv_nppods == 0, + ("%s: page pods already allocated", __func__)); /* * The DDP page size is unrelated to the VM page size. We combine @@ -905,79 +911,85 @@ alloc_page_pods(struct tom_data *td, str } hcf = calculate_hcf(hcf, seglen); - if (hcf < td->ddp_pgsz[1]) { + if (hcf < (1 << pr->pr_page_shift[1])) { idx = 0; goto have_pgsz; /* give up, short circuit */ } } - if (hcf % td->ddp_pgsz[0] != 0) { - /* hmmm. This could only happen when PAGE_SIZE < 4K */ - KASSERT(PAGE_SIZE < 4096, - ("%s: PAGE_SIZE %d, hcf %d", __func__, PAGE_SIZE, hcf)); - CTR3(KTR_CXGBE, "%s: PAGE_SIZE %d, hcf %d", - __func__, PAGE_SIZE, hcf); - return (0); - } - - for (idx = nitems(td->ddp_pgsz) - 1; idx > 0; idx--) { - if (hcf % td->ddp_pgsz[idx] == 0) +#define PR_PAGE_MASK(x) ((1 << pr->pr_page_shift[(x)]) - 1) + MPASS((hcf & PR_PAGE_MASK(0)) == 0); /* PAGE_SIZE is >= 4K everywhere */ + for (idx = nitems(pr->pr_page_shift) - 1; idx > 0; idx--) { + if ((hcf & PR_PAGE_MASK(idx)) == 0) break; } +#undef PR_PAGE_MASK + have_pgsz: MPASS(idx <= M_PPOD_PGSZ); - nppods = pages_to_nppods(ps->npages, td->ddp_pgsz[idx]); - if (alloc_ppods(td, nppods, &ppod_addr) != 0) { - CTR4(KTR_CXGBE, "%s: no pods, nppods %d, npages %d, pgsz %d", - __func__, nppods, ps->npages, td->ddp_pgsz[idx]); + nppods = pages_to_nppods(ps->npages, pr->pr_page_shift[idx]); + if (alloc_page_pods(pr, nppods, idx, prsv) != 0) return (0); - } - - ppod = (ppod_addr - td->ppod_start) / PPOD_SIZE; - ps->tag = V_PPOD_PGSZ(idx) | V_PPOD_TAG(ppod); - ps->ppod_addr = ppod_addr; - ps->nppods = nppods; - - CTR5(KTR_CXGBE, "New page pods. " - "ps %p, ddp_pgsz %d, ppod 0x%x, npages %d, nppods %d", - ps, td->ddp_pgsz[idx], ppod, ps->npages, ps->nppods); + MPASS(prsv->prsv_nppods > 0); return (1); } +void +t4_free_page_pods(struct ppod_reservation *prsv) +{ + struct ppod_region *pr = prsv->prsv_pr; + vmem_addr_t addr; + + MPASS(prsv != NULL); + MPASS(prsv->prsv_nppods != 0); + + addr = prsv->prsv_tag & pr->pr_tag_mask; + MPASS((addr & pr->pr_invalid_bit) == 0); + + CTR4(KTR_CXGBE, "%-17s arena %p, addr 0x%08x, nppods %d", __func__, + pr->pr_arena, addr, prsv->prsv_nppods); + + vmem_free(pr->pr_arena, addr, PPOD_SZ(prsv->prsv_nppods)); + prsv->prsv_nppods = 0; +} + #define NUM_ULP_TX_SC_IMM_PPODS (256 / PPOD_SIZE) -static int -write_page_pods(struct adapter *sc, struct toepcb *toep, struct pageset *ps) +int +t4_write_page_pods_for_ps(struct adapter *sc, struct sge_wrq *wrq, int tid, + struct pageset *ps) { struct wrqe *wr; struct ulp_mem_io *ulpmc; struct ulptx_idata *ulpsc; struct pagepod *ppod; - struct tom_data *td = sc->tom_softc; int i, j, k, n, chunk, len, ddp_pgsz, idx; u_int ppod_addr; uint32_t cmd; + struct ppod_reservation *prsv = &ps->prsv; + struct ppod_region *pr = prsv->prsv_pr; KASSERT(!(ps->flags & PS_PPODS_WRITTEN), ("%s: page pods already written", __func__)); + MPASS(prsv->prsv_nppods > 0); cmd = htobe32(V_ULPTX_CMD(ULP_TX_MEM_WRITE)); if (is_t4(sc)) cmd |= htobe32(F_ULP_MEMIO_ORDER); else cmd |= htobe32(F_T5_ULP_MEMIO_IMM); - ddp_pgsz = td->ddp_pgsz[G_PPOD_PGSZ(ps->tag)]; - ppod_addr = ps->ppod_addr; - for (i = 0; i < ps->nppods; ppod_addr += chunk) { + ddp_pgsz = 1 << pr->pr_page_shift[G_PPOD_PGSZ(prsv->prsv_tag)]; + ppod_addr = pr->pr_start + (prsv->prsv_tag & pr->pr_tag_mask); + for (i = 0; i < prsv->prsv_nppods; ppod_addr += chunk) { /* How many page pods are we writing in this cycle */ - n = min(ps->nppods - i, NUM_ULP_TX_SC_IMM_PPODS); + n = min(prsv->prsv_nppods - i, NUM_ULP_TX_SC_IMM_PPODS); chunk = PPOD_SZ(n); len = roundup2(sizeof(*ulpmc) + sizeof(*ulpsc) + chunk, 16); - wr = alloc_wrqe(len, toep->ctrlq); + wr = alloc_wrqe(len, wrq); if (wr == NULL) return (ENOMEM); /* ok to just bail out */ ulpmc = wrtod(wr); @@ -995,7 +1007,7 @@ write_page_pods(struct adapter *sc, stru ppod = (struct pagepod *)(ulpsc + 1); for (j = 0; j < n; i++, j++, ppod++) { ppod->vld_tid_pgsz_tag_color = htobe64(F_PPOD_VALID | - V_PPOD_TID(toep->tid) | ps->tag); + V_PPOD_TID(tid) | prsv->prsv_tag); ppod->len_offset = htobe64(V_PPOD_LEN(ps->len) | V_PPOD_OFST(ps->offset)); ppod->rsvd = 0; @@ -1053,51 +1065,64 @@ prep_pageset(struct adapter *sc, struct if (!(ps->flags & PS_WIRED)) wire_pageset(ps); - if (ps->nppods == 0 && !alloc_page_pods(td, ps)) { + if (ps->prsv.prsv_nppods == 0 && + !t4_alloc_page_pods_for_ps(&td->pr, ps)) { return (0); } if (!(ps->flags & PS_PPODS_WRITTEN) && - write_page_pods(sc, toep, ps) != 0) { + t4_write_page_pods_for_ps(sc, toep->ctrlq, toep->tid, ps) != 0) { return (0); } return (1); } -void -t4_init_ddp(struct adapter *sc, struct tom_data *td) +int +t4_init_ppod_region(struct ppod_region *pr, struct t4_range *r, u_int psz, + const char *name) { int i; - uint32_t r; - r = t4_read_reg(sc, A_ULP_RX_TDDP_PSZ); - td->ddp_pgsz[0] = 4096 << G_HPZ0(r); - td->ddp_pgsz[1] = 4096 << G_HPZ1(r); - td->ddp_pgsz[2] = 4096 << G_HPZ2(r); - td->ddp_pgsz[3] = 4096 << G_HPZ3(r); + MPASS(pr != NULL); + MPASS(r->size > 0); - /* - * The SGL -> page pod algorithm requires the sizes to be in increasing - * order. - */ - for (i = 1; i < nitems(td->ddp_pgsz); i++) { - if (td->ddp_pgsz[i] <= td->ddp_pgsz[i - 1]) - return; - } + pr->pr_start = r->start; + pr->pr_len = r->size; + pr->pr_page_shift[0] = 12 + G_HPZ0(psz); + pr->pr_page_shift[1] = 12 + G_HPZ1(psz); + pr->pr_page_shift[2] = 12 + G_HPZ2(psz); + pr->pr_page_shift[3] = 12 + G_HPZ3(psz); + + /* The SGL -> page pod algorithm requires the sizes to be in order. */ + for (i = 1; i < nitems(pr->pr_page_shift); i++) { + if (pr->pr_page_shift[i] <= pr->pr_page_shift[i - 1]) + return (ENXIO); + } + + pr->pr_tag_mask = ((1 << fls(r->size)) - 1) & V_PPOD_TAG(M_PPOD_TAG); + pr->pr_alias_mask = V_PPOD_TAG(M_PPOD_TAG) & ~pr->pr_tag_mask; + if (pr->pr_tag_mask == 0 || pr->pr_alias_mask == 0) + return (ENXIO); + pr->pr_alias_shift = fls(pr->pr_tag_mask); + pr->pr_invalid_bit = 1 << (pr->pr_alias_shift - 1); + + pr->pr_arena = vmem_create(name, 0, pr->pr_len, PPOD_SIZE, 0, + M_FIRSTFIT | M_NOWAIT); + if (pr->pr_arena == NULL) + return (ENOMEM); - td->ppod_start = sc->vres.ddp.start; - td->ppod_arena = vmem_create("DDP page pods", sc->vres.ddp.start, - sc->vres.ddp.size, PPOD_SIZE, 512, M_FIRSTFIT | M_NOWAIT); + return (0); } void -t4_uninit_ddp(struct adapter *sc __unused, struct tom_data *td) +t4_free_ppod_region(struct ppod_region *pr) { - if (td->ppod_arena != NULL) { - vmem_destroy(td->ppod_arena); - td->ppod_arena = NULL; - } + MPASS(pr != NULL); + + if (pr->pr_arena) + vmem_destroy(pr->pr_arena); + bzero(pr, sizeof(*pr)); } static int Modified: head/sys/dev/cxgbe/tom/t4_tom.c ============================================================================== --- head/sys/dev/cxgbe/tom/t4_tom.c Wed Aug 31 22:18:50 2016 (r305165) +++ head/sys/dev/cxgbe/tom/t4_tom.c Wed Aug 31 23:23:46 2016 (r305166) @@ -930,7 +930,7 @@ free_tom_data(struct adapter *sc, struct KASSERT(td->lctx_count == 0, ("%s: lctx hash table is not empty.", __func__)); - t4_uninit_ddp(sc, td); + t4_free_ppod_region(&td->pr); destroy_clip_table(sc, td); if (td->listen_mask != 0) @@ -1024,8 +1024,12 @@ t4_tom_activate(struct adapter *sc) if (rc != 0) goto done; - /* DDP page pods and CPL handlers */ - t4_init_ddp(sc, td); + rc = t4_init_ppod_region(&td->pr, &sc->vres.ddp, + t4_read_reg(sc, A_ULP_RX_TDDP_PSZ), "TDDP page pods"); + if (rc != 0) + goto done; + t4_set_reg_field(sc, A_ULP_RX_TDDP_TAGMASK, + V_TDDPTAGMASK(M_TDDPTAGMASK), td->pr.pr_tag_mask); /* CLIP table for IPv6 offload */ init_clip_table(sc, td); Modified: head/sys/dev/cxgbe/tom/t4_tom.h ============================================================================== --- head/sys/dev/cxgbe/tom/t4_tom.h Wed Aug 31 22:18:50 2016 (r305165) +++ head/sys/dev/cxgbe/tom/t4_tom.h Wed Aug 31 23:23:46 2016 (r305166) @@ -51,6 +51,9 @@ #define USE_DDP_RX_FLOW_CONTROL +#define PPOD_SZ(n) ((n) * sizeof(struct pagepod)) +#define PPOD_SIZE (PPOD_SZ(1)) + /* TOE PCB flags */ enum { TPF_ATTACHED = (1 << 0), /* a tcpcb refers to this toepcb */ @@ -83,16 +86,31 @@ struct ofld_tx_sdesc { uint8_t tx_credits; /* firmware tx credits (unit is 16B) */ }; +struct ppod_region { + u_int pr_start; + u_int pr_len; + u_int pr_page_shift[4]; + uint32_t pr_tag_mask; /* hardware tagmask for this region. */ + uint32_t pr_invalid_bit; /* OR with this to invalidate tag. */ + uint32_t pr_alias_mask; /* AND with tag to get alias bits. */ + u_int pr_alias_shift; /* shift this much for first alias bit. */ + vmem_t *pr_arena; +}; + +struct ppod_reservation { + struct ppod_region *prsv_pr; + uint32_t prsv_tag; /* Full tag: pgsz, alias, tag, color */ + u_int prsv_nppods; +}; + struct pageset { TAILQ_ENTRY(pageset) link; vm_page_t *pages; int npages; int flags; - u_int ppod_addr; - int nppods; - uint32_t tag; /* includes color, page pod addr, and DDP page size */ int offset; /* offset in first page */ int len; + struct ppod_reservation prsv; struct vmspace *vm; u_int vm_timestamp; }; @@ -239,9 +257,7 @@ struct tom_data { u_long listen_mask; int lctx_count; /* # of lctx in the hash table */ - u_int ppod_start; - u_int ddp_pgsz[4]; - vmem_t *ppod_arena; + struct ppod_region pr; struct mtx clip_table_lock; struct clip_head clip_table; @@ -346,8 +362,13 @@ void t4_push_pdus(struct adapter *sc, st int do_set_tcb_rpl(struct sge_iq *, const struct rss_header *, struct mbuf *); /* t4_ddp.c */ -void t4_init_ddp(struct adapter *, struct tom_data *); -void t4_uninit_ddp(struct adapter *, struct tom_data *); +int t4_init_ppod_region(struct ppod_region *, struct t4_range *, u_int, + const char *); +void t4_free_ppod_region(struct ppod_region *); +int t4_alloc_page_pods_for_ps(struct ppod_region *, struct pageset *); +int t4_write_page_pods_for_ps(struct adapter *, struct sge_wrq *, int, + struct pageset *); +void t4_free_page_pods(struct ppod_reservation *); int t4_soreceive_ddp(struct socket *, struct sockaddr **, struct uio *, struct mbuf **, struct mbuf **, int *); int t4_aio_queue_ddp(struct socket *, struct kaiocb *);
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