diff options
Diffstat (limited to 'drivers/thunderbolt')
| -rw-r--r-- | drivers/thunderbolt/dma_test.c | 35 | ||||
| -rw-r--r-- | drivers/thunderbolt/domain.c | 24 | ||||
| -rw-r--r-- | drivers/thunderbolt/icm.c | 32 | ||||
| -rw-r--r-- | drivers/thunderbolt/tb.c | 48 | ||||
| -rw-r--r-- | drivers/thunderbolt/tb.h | 16 | ||||
| -rw-r--r-- | drivers/thunderbolt/tunnel.c | 82 | ||||
| -rw-r--r-- | drivers/thunderbolt/tunnel.h | 8 | ||||
| -rw-r--r-- | drivers/thunderbolt/xdomain.c | 139 |
8 files changed, 282 insertions, 102 deletions
diff --git a/drivers/thunderbolt/dma_test.c b/drivers/thunderbolt/dma_test.c index 6debaf5a6604..3bedecb236e0 100644 --- a/drivers/thunderbolt/dma_test.c +++ b/drivers/thunderbolt/dma_test.c @@ -13,7 +13,6 @@ #include <linux/sizes.h> #include <linux/thunderbolt.h> -#define DMA_TEST_HOPID 8 #define DMA_TEST_TX_RING_SIZE 64 #define DMA_TEST_RX_RING_SIZE 256 #define DMA_TEST_FRAME_SIZE SZ_4K @@ -72,7 +71,9 @@ static const char * const dma_test_result_names[] = { * @svc: XDomain service the driver is bound to * @xd: XDomain the service belongs to * @rx_ring: Software ring holding RX frames + * @rx_hopid: HopID used for receiving frames * @tx_ring: Software ring holding TX frames + * @tx_hopid: HopID used for sending fames * @packets_to_send: Number of packets to send * @packets_to_receive: Number of packets to receive * @packets_sent: Actual number of packets sent @@ -92,7 +93,9 @@ struct dma_test { const struct tb_service *svc; struct tb_xdomain *xd; struct tb_ring *rx_ring; + int rx_hopid; struct tb_ring *tx_ring; + int tx_hopid; unsigned int packets_to_send; unsigned int packets_to_receive; unsigned int packets_sent; @@ -119,10 +122,12 @@ static void *dma_test_pattern; static void dma_test_free_rings(struct dma_test *dt) { if (dt->rx_ring) { + tb_xdomain_release_in_hopid(dt->xd, dt->rx_hopid); tb_ring_free(dt->rx_ring); dt->rx_ring = NULL; } if (dt->tx_ring) { + tb_xdomain_release_out_hopid(dt->xd, dt->tx_hopid); tb_ring_free(dt->tx_ring); dt->tx_ring = NULL; } @@ -151,6 +156,14 @@ static int dma_test_start_rings(struct dma_test *dt) dt->tx_ring = ring; e2e_tx_hop = ring->hop; + + ret = tb_xdomain_alloc_out_hopid(xd, -1); + if (ret < 0) { + dma_test_free_rings(dt); + return ret; + } + + dt->tx_hopid = ret; } if (dt->packets_to_receive) { @@ -168,11 +181,19 @@ static int dma_test_start_rings(struct dma_test *dt) } dt->rx_ring = ring; + + ret = tb_xdomain_alloc_in_hopid(xd, -1); + if (ret < 0) { + dma_test_free_rings(dt); + return ret; + } + + dt->rx_hopid = ret; } - ret = tb_xdomain_enable_paths(dt->xd, DMA_TEST_HOPID, + ret = tb_xdomain_enable_paths(dt->xd, dt->tx_hopid, dt->tx_ring ? dt->tx_ring->hop : 0, - DMA_TEST_HOPID, + dt->rx_hopid, dt->rx_ring ? dt->rx_ring->hop : 0); if (ret) { dma_test_free_rings(dt); @@ -189,12 +210,18 @@ static int dma_test_start_rings(struct dma_test *dt) static void dma_test_stop_rings(struct dma_test *dt) { + int ret; + if (dt->rx_ring) tb_ring_stop(dt->rx_ring); if (dt->tx_ring) tb_ring_stop(dt->tx_ring); - if (tb_xdomain_disable_paths(dt->xd)) + ret = tb_xdomain_disable_paths(dt->xd, dt->tx_hopid, + dt->tx_ring ? dt->tx_ring->hop : 0, + dt->rx_hopid, + dt->rx_ring ? dt->rx_ring->hop : 0); + if (ret) dev_warn(&dt->svc->dev, "failed to disable DMA paths\n"); dma_test_free_rings(dt); diff --git a/drivers/thunderbolt/domain.c b/drivers/thunderbolt/domain.c index 039486b61b6a..a7d83eec3d15 100644 --- a/drivers/thunderbolt/domain.c +++ b/drivers/thunderbolt/domain.c @@ -791,6 +791,10 @@ int tb_domain_disconnect_pcie_paths(struct tb *tb) * tb_domain_approve_xdomain_paths() - Enable DMA paths for XDomain * @tb: Domain enabling the DMA paths * @xd: XDomain DMA paths are created to + * @transmit_path: HopID we are using to send out packets + * @transmit_ring: DMA ring used to send out packets + * @receive_path: HopID the other end is using to send packets to us + * @receive_ring: DMA ring used to receive packets from @receive_path * * Calls connection manager specific method to enable DMA paths to the * XDomain in question. @@ -799,18 +803,25 @@ int tb_domain_disconnect_pcie_paths(struct tb *tb) * particular returns %-ENOTSUPP if the connection manager * implementation does not support XDomains. */ -int tb_domain_approve_xdomain_paths(struct tb *tb, struct tb_xdomain *xd) +int tb_domain_approve_xdomain_paths(struct tb *tb, struct tb_xdomain *xd, + int transmit_path, int transmit_ring, + int receive_path, int receive_ring) { if (!tb->cm_ops->approve_xdomain_paths) return -ENOTSUPP; - return tb->cm_ops->approve_xdomain_paths(tb, xd); + return tb->cm_ops->approve_xdomain_paths(tb, xd, transmit_path, + transmit_ring, receive_path, receive_ring); } /** * tb_domain_disconnect_xdomain_paths() - Disable DMA paths for XDomain * @tb: Domain disabling the DMA paths * @xd: XDomain whose DMA paths are disconnected + * @transmit_path: HopID we are using to send out packets + * @transmit_ring: DMA ring used to send out packets + * @receive_path: HopID the other end is using to send packets to us + * @receive_ring: DMA ring used to receive packets from @receive_path * * Calls connection manager specific method to disconnect DMA paths to * the XDomain in question. @@ -819,12 +830,15 @@ int tb_domain_approve_xdomain_paths(struct tb *tb, struct tb_xdomain *xd) * particular returns %-ENOTSUPP if the connection manager * implementation does not support XDomains. */ -int tb_domain_disconnect_xdomain_paths(struct tb *tb, struct tb_xdomain *xd) +int tb_domain_disconnect_xdomain_paths(struct tb *tb, struct tb_xdomain *xd, + int transmit_path, int transmit_ring, + int receive_path, int receive_ring) { if (!tb->cm_ops->disconnect_xdomain_paths) return -ENOTSUPP; - return tb->cm_ops->disconnect_xdomain_paths(tb, xd); + return tb->cm_ops->disconnect_xdomain_paths(tb, xd, transmit_path, + transmit_ring, receive_path, receive_ring); } static int disconnect_xdomain(struct device *dev, void *data) @@ -835,7 +849,7 @@ static int disconnect_xdomain(struct device *dev, void *data) xd = tb_to_xdomain(dev); if (xd && xd->tb == tb) - ret = tb_xdomain_disable_paths(xd); + ret = tb_xdomain_disable_all_paths(xd); return ret; } diff --git a/drivers/thunderbolt/icm.c b/drivers/thunderbolt/icm.c index c111b946c64d..2f30b816705a 100644 --- a/drivers/thunderbolt/icm.c +++ b/drivers/thunderbolt/icm.c @@ -557,7 +557,9 @@ static int icm_fr_challenge_switch_key(struct tb *tb, struct tb_switch *sw, return 0; } -static int icm_fr_approve_xdomain_paths(struct tb *tb, struct tb_xdomain *xd) +static int icm_fr_approve_xdomain_paths(struct tb *tb, struct tb_xdomain *xd, + int transmit_path, int transmit_ring, + int receive_path, int receive_ring) { struct icm_fr_pkg_approve_xdomain_response reply; struct icm_fr_pkg_approve_xdomain request; @@ -568,10 +570,10 @@ static int icm_fr_approve_xdomain_paths(struct tb *tb, struct tb_xdomain *xd) request.link_info = xd->depth << ICM_LINK_INFO_DEPTH_SHIFT | xd->link; memcpy(&request.remote_uuid, xd->remote_uuid, sizeof(*xd->remote_uuid)); - request.transmit_path = xd->transmit_path; - request.transmit_ring = xd->transmit_ring; - request.receive_path = xd->receive_path; - request.receive_ring = xd->receive_ring; + request.transmit_path = transmit_path; + request.transmit_ring = transmit_ring; + request.receive_path = receive_path; + request.receive_ring = receive_ring; memset(&reply, 0, sizeof(reply)); ret = icm_request(tb, &request, sizeof(request), &reply, sizeof(reply), @@ -585,7 +587,9 @@ static int icm_fr_approve_xdomain_paths(struct tb *tb, struct tb_xdomain *xd) return 0; } -static int icm_fr_disconnect_xdomain_paths(struct tb *tb, struct tb_xdomain *xd) +static int icm_fr_disconnect_xdomain_paths(struct tb *tb, struct tb_xdomain *xd, + int transmit_path, int transmit_ring, + int receive_path, int receive_ring) { u8 phy_port; u8 cmd; @@ -1122,7 +1126,9 @@ static int icm_tr_challenge_switch_key(struct tb *tb, struct tb_switch *sw, return 0; } -static int icm_tr_approve_xdomain_paths(struct tb *tb, struct tb_xdomain *xd) +static int icm_tr_approve_xdomain_paths(struct tb *tb, struct tb_xdomain *xd, + int transmit_path, int transmit_ring, + int receive_path, int receive_ring) { struct icm_tr_pkg_approve_xdomain_response reply; struct icm_tr_pkg_approve_xdomain request; @@ -1132,10 +1138,10 @@ static int icm_tr_approve_xdomain_paths(struct tb *tb, struct tb_xdomain *xd) request.hdr.code = ICM_APPROVE_XDOMAIN; request.route_hi = upper_32_bits(xd->route); request.route_lo = lower_32_bits(xd->route); - request.transmit_path = xd->transmit_path; - request.transmit_ring = xd->transmit_ring; - request.receive_path = xd->receive_path; - request.receive_ring = xd->receive_ring; + request.transmit_path = transmit_path; + request.transmit_ring = transmit_ring; + request.receive_path = receive_path; + request.receive_ring = receive_ring; memcpy(&request.remote_uuid, xd->remote_uuid, sizeof(*xd->remote_uuid)); memset(&reply, 0, sizeof(reply)); @@ -1176,7 +1182,9 @@ static int icm_tr_xdomain_tear_down(struct tb *tb, struct tb_xdomain *xd, return 0; } -static int icm_tr_disconnect_xdomain_paths(struct tb *tb, struct tb_xdomain *xd) +static int icm_tr_disconnect_xdomain_paths(struct tb *tb, struct tb_xdomain *xd, + int transmit_path, int transmit_ring, + int receive_path, int receive_ring) { int ret; diff --git a/drivers/thunderbolt/tb.c b/drivers/thunderbolt/tb.c index 30e17f7d9e1f..eb15022e4e3e 100644 --- a/drivers/thunderbolt/tb.c +++ b/drivers/thunderbolt/tb.c @@ -1075,7 +1075,9 @@ static int tb_tunnel_pci(struct tb *tb, struct tb_switch *sw) return 0; } -static int tb_approve_xdomain_paths(struct tb *tb, struct tb_xdomain *xd) +static int tb_approve_xdomain_paths(struct tb *tb, struct tb_xdomain *xd, + int transmit_path, int transmit_ring, + int receive_path, int receive_ring) { struct tb_cm *tcm = tb_priv(tb); struct tb_port *nhi_port, *dst_port; @@ -1087,9 +1089,8 @@ static int tb_approve_xdomain_paths(struct tb *tb, struct tb_xdomain *xd) nhi_port = tb_switch_find_port(tb->root_switch, TB_TYPE_NHI); mutex_lock(&tb->lock); - tunnel = tb_tunnel_alloc_dma(tb, nhi_port, dst_port, xd->transmit_ring, - xd->transmit_path, xd->receive_ring, - xd->receive_path); + tunnel = tb_tunnel_alloc_dma(tb, nhi_port, dst_port, transmit_path, + transmit_ring, receive_path, receive_ring); if (!tunnel) { mutex_unlock(&tb->lock); return -ENOMEM; @@ -1108,29 +1109,40 @@ static int tb_approve_xdomain_paths(struct tb *tb, struct tb_xdomain *xd) return 0; } -static void __tb_disconnect_xdomain_paths(struct tb *tb, struct tb_xdomain *xd) +static void __tb_disconnect_xdomain_paths(struct tb *tb, struct tb_xdomain *xd, + int transmit_path, int transmit_ring, + int receive_path, int receive_ring) { - struct tb_port *dst_port; - struct tb_tunnel *tunnel; + struct tb_cm *tcm = tb_priv(tb); + struct tb_port *nhi_port, *dst_port; + struct tb_tunnel *tunnel, *n; struct tb_switch *sw; sw = tb_to_switch(xd->dev.parent); dst_port = tb_port_at(xd->route, sw); + nhi_port = tb_switch_find_port(tb->root_switch, TB_TYPE_NHI); - /* - * It is possible that the tunnel was already teared down (in - * case of cable disconnect) so it is fine if we cannot find it - * here anymore. - */ - tunnel = tb_find_tunnel(tb, TB_TUNNEL_DMA, NULL, dst_port); - tb_deactivate_and_free_tunnel(tunnel); + list_for_each_entry_safe(tunnel, n, &tcm->tunnel_list, list) { + if (!tb_tunnel_is_dma(tunnel)) + continue; + if (tunnel->src_port != nhi_port || tunnel->dst_port != dst_port) + continue; + + if (tb_tunnel_match_dma(tunnel, transmit_path, transmit_ring, + receive_path, receive_ring)) + tb_deactivate_and_free_tunnel(tunnel); + } } -static int tb_disconnect_xdomain_paths(struct tb *tb, struct tb_xdomain *xd) +static int tb_disconnect_xdomain_paths(struct tb *tb, struct tb_xdomain *xd, + int transmit_path, int transmit_ring, + int receive_path, int receive_ring) { if (!xd->is_unplugged) { mutex_lock(&tb->lock); - __tb_disconnect_xdomain_paths(tb, xd); + __tb_disconnect_xdomain_paths(tb, xd, transmit_path, + transmit_ring, receive_path, + receive_ring); mutex_unlock(&tb->lock); } return 0; @@ -1206,12 +1218,12 @@ static void tb_handle_hotplug(struct work_struct *work) * tb_xdomain_remove() so setting XDomain as * unplugged here prevents deadlock if they call * tb_xdomain_disable_paths(). We will tear down - * the path below. + * all the tunnels below. */ xd->is_unplugged = true; tb_xdomain_remove(xd); port->xdomain = NULL; - __tb_disconnect_xdomain_paths(tb, xd); + __tb_disconnect_xdomain_paths(tb, xd, -1, -1, -1, -1); tb_xdomain_put(xd); tb_port_unconfigure_xdomain(port); } else if (tb_port_is_dpout(port) || tb_port_is_dpin(port)) { diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h index 56f6a3f13678..9790e9f13d2b 100644 --- a/drivers/thunderbolt/tb.h +++ b/drivers/thunderbolt/tb.h @@ -406,8 +406,12 @@ struct tb_cm_ops { int (*challenge_switch_key)(struct tb *tb, struct tb_switch *sw, const u8 *challenge, u8 *response); int (*disconnect_pcie_paths)(struct tb *tb); - int (*approve_xdomain_paths)(struct tb *tb, struct tb_xdomain *xd); - int (*disconnect_xdomain_paths)(struct tb *tb, struct tb_xdomain *xd); + int (*approve_xdomain_paths)(struct tb *tb, struct tb_xdomain *xd, + int transmit_path, int transmit_ring, + int receive_path, int receive_ring); + int (*disconnect_xdomain_paths)(struct tb *tb, struct tb_xdomain *xd, + int transmit_path, int transmit_ring, + int receive_path, int receive_ring); int (*usb4_switch_op)(struct tb_switch *sw, u16 opcode, u32 *metadata, u8 *status, const void *tx_data, size_t tx_data_len, void *rx_data, size_t rx_data_len); @@ -641,8 +645,12 @@ int tb_domain_approve_switch(struct tb *tb, struct tb_switch *sw); int tb_domain_approve_switch_key(struct tb *tb, struct tb_switch *sw); int tb_domain_challenge_switch_key(struct tb *tb, struct tb_switch *sw); int tb_domain_disconnect_pcie_paths(struct tb *tb); -int tb_domain_approve_xdomain_paths(struct tb *tb, struct tb_xdomain *xd); -int tb_domain_disconnect_xdomain_paths(struct tb *tb, struct tb_xdomain *xd); +int tb_domain_approve_xdomain_paths(struct tb *tb, struct tb_xdomain *xd, + int transmit_path, int transmit_ring, + int receive_path, int receive_ring); +int tb_domain_disconnect_xdomain_paths(struct tb *tb, struct tb_xdomain *xd, + int transmit_path, int transmit_ring, + int receive_path, int receive_ring); int tb_domain_disconnect_all_paths(struct tb *tb); static inline struct tb *tb_domain_get(struct tb *tb) diff --git a/drivers/thunderbolt/tunnel.c b/drivers/thunderbolt/tunnel.c index 2e7ec037a73e..e1979bed7146 100644 --- a/drivers/thunderbolt/tunnel.c +++ b/drivers/thunderbolt/tunnel.c @@ -815,28 +815,28 @@ static void tb_dma_init_path(struct tb_path *path, unsigned int efc, u32 credits * @tb: Pointer to the domain structure * @nhi: Host controller port * @dst: Destination null port which the other domain is connected to - * @transmit_ring: NHI ring number used to send packets towards the - * other domain. Set to %0 if TX path is not needed. * @transmit_path: HopID used for transmitting packets - * @receive_ring: NHI ring number used to receive packets from the - * other domain. Set to %0 if RX path is not needed. + * @transmit_ring: NHI ring number used to send packets towards the + * other domain. Set to %-1 if TX path is not needed. * @receive_path: HopID used for receiving packets + * @receive_ring: NHI ring number used to receive packets from the + * other domain. Set to %-1 if RX path is not needed. * * Return: Returns a tb_tunnel on success or NULL on failure. */ struct tb_tunnel *tb_tunnel_alloc_dma(struct tb *tb, struct tb_port *nhi, - struct tb_port *dst, int transmit_ring, - int transmit_path, int receive_ring, - int receive_path) + struct tb_port *dst, int transmit_path, + int transmit_ring, int receive_path, + int receive_ring) { struct tb_tunnel *tunnel; size_t npaths = 0, i = 0; struct tb_path *path; u32 credits; - if (receive_ring) + if (receive_ring > 0) npaths++; - if (transmit_ring) + if (transmit_ring > 0) npaths++; if (WARN_ON(!npaths)) @@ -851,7 +851,7 @@ struct tb_tunnel *tb_tunnel_alloc_dma(struct tb *tb, struct tb_port *nhi, credits = tb_dma_credits(nhi); - if (receive_ring) { + if (receive_ring > 0) { path = tb_path_alloc(tb, dst, receive_path, nhi, receive_ring, 0, "DMA RX"); if (!path) { @@ -862,7 +862,7 @@ struct tb_tunnel *tb_tunnel_alloc_dma(struct tb *tb, struct tb_port *nhi, tunnel->paths[i++] = path; } - if (transmit_ring) { + if (transmit_ring > 0) { path = tb_path_alloc(tb, nhi, transmit_ring, dst, transmit_path, 0, "DMA TX"); if (!path) { @@ -876,6 +876,66 @@ struct tb_tunnel *tb_tunnel_alloc_dma(struct tb *tb, struct tb_port *nhi, return tunnel; } +/** + * tb_tunnel_match_dma() - Match DMA tunnel + * @tunnel: Tunnel to match + * @transmit_path: HopID used for transmitting packets. Pass %-1 to ignore. + * @transmit_ring: NHI ring number used to send packets towards the + * other domain. Pass %-1 to ignore. + * @receive_path: HopID used for receiving packets. Pass %-1 to ignore. + * @receive_ring: NHI ring number used to receive packets from the + * other domain. Pass %-1 to ignore. + * + * This function can be used to match specific DMA tunnel, if there are + * multiple DMA tunnels going through the same XDomain connection. + * Returns true if there is match and false otherwise. + */ +bool tb_tunnel_match_dma(const struct tb_tunnel *tunnel, int transmit_path, + int transmit_ring, int receive_path, int receive_ring) +{ + const struct tb_path *tx_path = NULL, *rx_path = NULL; + int i; + + if (!receive_ring || !transmit_ring) + return false; + + for (i = 0; i < tunnel->npaths; i++) { + const struct tb_path *path = tunnel->paths[i]; + + if (!path) + continue; + + if (tb_port_is_nhi(path->hops[0].in_port)) + tx_path = path; + else if (tb_port_is_nhi(path->hops[path->path_length - 1].out_port)) + rx_path = path; + } + + if (transmit_ring > 0 || transmit_path > 0) { + if (!tx_path) + return false; + if (transmit_ring > 0 && + (tx_path->hops[0].in_hop_index != transmit_ring)) + return false; + if (transmit_path > 0 && + (tx_path->hops[tx_path->path_length - 1].next_hop_index != transmit_path)) + return false; + } + + if (receive_ring > 0 || receive_path > 0) { + if (!rx_path) + return false; + if (receive_path > 0 && + (rx_path->hops[0].in_hop_index != receive_path)) + return false; + if (receive_ring > 0 && + (rx_path->hops[rx_path->path_length - 1].next_hop_index != receive_ring)) + return false; + } + + return true; +} + static int tb_usb3_max_link_rate(struct tb_port *up, struct tb_port *down) { int ret, up_max_rate, down_max_rate; diff --git a/drivers/thunderbolt/tunnel.h b/drivers/thunderbolt/tunnel.h index 1d2a64eb060d..a66994fb4e60 100644 --- a/drivers/thunderbolt/tunnel.h +++ b/drivers/thunderbolt/tunnel.h @@ -70,9 +70,11 @@ struct tb_tunnel *tb_tunnel_alloc_dp(struct tb *tb, struct tb_port *in, struct tb_port *out, int max_up, int max_down); struct tb_tunnel *tb_tunnel_alloc_dma(struct tb *tb, struct tb_port *nhi, - struct tb_port *dst, int transmit_ring, - int transmit_path, int receive_ring, - int receive_path); + struct tb_port *dst, int transmit_path, + int transmit_ring, int receive_path, + int receive_ring); +bool tb_tunnel_match_dma(const struct tb_tunnel *tunnel, int transmit_path, + int transmit_ring, int receive_path, int receive_ring); struct tb_tunnel *tb_tunnel_discover_usb3(struct tb *tb, struct tb_port *down); struct tb_tunnel *tb_tunnel_alloc_usb3(struct tb *tb, struct tb_port *up, struct tb_port *down, int max_up, diff --git a/drivers/thunderbolt/xdomain.c b/drivers/thunderbolt/xdomain.c index ab56757d7c24..b21d99d59412 100644 --- a/drivers/thunderbolt/xdomain.c +++ b/drivers/thunderbolt/xdomain.c @@ -1295,6 +1295,8 @@ static void tb_xdomain_release(struct device *dev) kfree(xd->local_property_block); tb_property_free_dir(xd->remote_properties); + ida_destroy(&xd->out_hopids); + ida_destroy(&xd->in_hopids); ida_destroy(&xd->service_ids); kfree(xd->local_uuid); @@ -1388,6 +1390,8 @@ struct tb_xdomain *tb_xdomain_alloc(struct tb *tb, struct device *parent, xd->route = route; xd->local_max_hopid = down->config.max_in_hop_id; ida_init(&xd->service_ids); + ida_init(&xd->in_hopids); + ida_init(&xd->out_hopids); mutex_init(&xd->lock); INIT_DELAYED_WORK(&xd->get_uuid_work, tb_xdomain_get_uuid); INIT_DELAYED_WORK(&xd->get_properties_work, tb_xdomain_get_properties); @@ -1553,73 +1557,118 @@ void tb_xdomain_lane_bonding_disable(struct tb_xdomain *xd) EXPORT_SYMBOL_GPL(tb_xdomain_lane_bonding_disable); /** - * tb_xdomain_enable_paths() - Enable DMA paths for XDomain connection + * tb_xdomain_alloc_in_hopid() - Allocate input HopID for tunneling * @xd: XDomain connection - * @transmit_path: HopID of the transmit path the other end is using to - * send packets - * @transmit_ring: DMA ring used to receive packets from the other end - * @receive_path: HopID of the receive path the other end is using to - * receive packets - * @receive_ring: DMA ring used to send packets to the other end - * - * The function enables DMA paths accordingly so that after successful - * return the caller can send and receive packets using high-speed DMA - * path. + * @hopid: Preferred HopID or %-1 for next available * - * Return: %0 in case of success and negative errno in case of error + * Returns allocated HopID or negative errno. Specifically returns + * %-ENOSPC if there are no more available HopIDs. Returned HopID is + * guaranteed to be within range supported by the input lane adapter. + * Call tb_xdomain_release_in_hopid() to release the allocated HopID. */ -int tb_xdomain_enable_paths(struct tb_xdomain *xd, u16 transmit_path, - u16 transmit_ring, u16 receive_path, - u16 receive_ring) +int tb_xdomain_alloc_in_hopid(struct tb_xdomain *xd, int hopid) { - int ret; + if (hopid < 0) + hopid = TB_PATH_MIN_HOPID; + if (hopid < TB_PATH_MIN_HOPID || hopid > xd->local_max_hopid) + return -EINVAL; - mutex_lock(&xd->lock); + return ida_alloc_range(&xd->in_hopids, hopid, xd->local_max_hopid, + GFP_KERNEL); +} +EXPORT_SYMBOL_GPL(tb_xdomain_alloc_in_hopid); - if (xd->transmit_path) { - ret = xd->transmit_path == transmit_path ? 0 : -EBUSY; - goto exit_unlock; - } +/** + * tb_xdomain_alloc_out_hopid() - Allocate output HopID for tunneling + * @xd: XDomain connection + * @hopid: Preferred HopID or %-1 for next available + * + * Returns allocated HopID or negative errno. Specifically returns + * %-ENOSPC if there are no more available HopIDs. Returned HopID is + * guaranteed to be within range supported by the output lane adapter. + * Call tb_xdomain_release_in_hopid() to release the allocated HopID. + */ +int tb_xdomain_alloc_out_hopid(struct tb_xdomain *xd, int hopid) +{ + if (hopid < 0) + hopid = TB_PATH_MIN_HOPID; + if (hopid < TB_PATH_MIN_HOPID || hopid > xd->remote_max_hopid) + return -EINVAL; - xd->transmit_path = transmit_path; - xd->transmit_ring = transmit_ring; - xd->receive_path = receive_path; - xd->receive_ring = receive_ring; + return ida_alloc_range(&xd->out_hopids, hopid, xd->remote_max_hopid, + GFP_KERNEL); +} +EXPORT_SYMBOL_GPL(tb_xdomain_alloc_out_hopid); - ret = tb_domain_approve_xdomain_paths(xd->tb, xd); +/** + * tb_xdomain_release_in_hopid() - Release input HopID + * @xd: XDomain connection + * @hopid: HopID to release + */ +void tb_xdomain_release_in_hopid(struct tb_xdomain *xd, int hopid) +{ + ida_free(&xd->in_hopids, hopid); +} +EXPORT_SYMBOL_GPL(tb_xdomain_release_in_hopid); -exit_unlock: - mutex_unlock(&xd->lock); +/** + * tb_xdomain_release_out_hopid() - Release output HopID + * @xd: XDomain connection + * @hopid: HopID to release + */ +void tb_xdomain_release_out_hopid(struct tb_xdomain *xd, int hopid) +{ + ida_free(&xd->out_hopids, hopid); +} +EXPORT_SYMBOL_GPL(tb_xdomain_release_out_hopid); - return ret; +/** + * tb_xdomain_enable_paths() - Enable DMA paths for XDomain connection + * @xd: XDomain connection + * @transmit_path: HopID we are using to send out packets + * @transmit_ring: DMA ring used to send out packets + * @receive_path: HopID the other end is using to send packets to us + * @receive_ring: DMA ring used to receive packets from @receive_path + * + * The function enables DMA paths accordingly so that after successful + * return the caller can send and receive packets using high-speed DMA + * path. If a transmit or receive path is not needed, pass %-1 for those + * parameters. + * + * Return: %0 in case of success and negative errno in case of error + */ +int tb_xdomain_enable_paths(struct tb_xdomain *xd, int transmit_path, + int transmit_ring, int receive_path, + int receive_ring) +{ + return tb_domain_approve_xdomain_paths(xd->tb, xd, transmit_path, + transmit_ring, receive_path, + receive_ring); } EXPORT_SYMBOL_GPL(tb_xdomain_enable_paths); /** * tb_xdomain_disable_paths() - Disable DMA paths for XDomain connection * @xd: XDomain connection + * @transmit_path: HopID we are using to send out packets + * @transmit_ring: DMA ring used to send out packets + * @receive_path: HopID the other end is using to send packets to us + * @receive_ring: DMA ring used to receive packets from @receive_path * * This does the opposite of tb_xdomain_enable_paths(). After call to - * this the caller is not expected to use the rings anymore. + * this the caller is not expected to use the rings anymore. Passing %-1 + * as path/ring parameter means don't care. Normally the callers should + * pass the same values here as they do when paths are enabled. * * Return: %0 in case of success and negative errno in case of error */ -int tb_xdomain_disable_paths(struct tb_xdomain *xd) +int tb_xdomain_disable_paths(struct tb_xdomain *xd, int transmit_path, + int transmit_ring, int receive_path, + int receive_ring) { - int ret = 0; - - mutex_lock(&xd->lock); - if (xd->transmit_path) { - xd->transmit_path = 0; - xd->transmit_ring = 0; - xd->receive_path = 0; - xd->receive_ring = 0; - - ret = tb_domain_disconnect_xdomain_paths(xd->tb, xd); - } - mutex_unlock(&xd->lock); - - return ret; + return tb_domain_disconnect_xdomain_paths(xd->tb, xd, transmit_path, + transmit_ring, receive_path, + receive_ring); } EXPORT_SYMBOL_GPL(tb_xdomain_disable_paths); |