wil6210: atomic I/O for the card memory (dba4b74d) · Commits · e / devices / android_kernel_xiaomi_markw

MAINTAINERS

+1 −0

Original line number	Diff line number	Diff line
		@@ -1611,6 +1611,7 @@ L: wil6210@qca.qualcomm.com
		S: Supported
		W: http://wireless.kernel.org/en/users/Drivers/wil6210
		F: drivers/net/wireless/ath/wil6210/
		F: include/uapi/linux/wil6210_uapi.h

		CARL9170 LINUX COMMUNITY WIRELESS DRIVER
		M: Christian Lamparter <chunkeey@googlemail.com>

drivers/net/wireless/ath/wil6210/Makefile

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Original line number	Diff line number	Diff line
		@@ -10,6 +10,7 @@ wil6210-y += interrupt.o
		wil6210-y += txrx.o
		wil6210-y += debug.o
		wil6210-y += rx_reorder.o
		wil6210-y += ioctl.o
		wil6210-y += fw.o
		wil6210-$(CONFIG_WIL6210_TRACING) += trace.o
		wil6210-y += wil_platform.o

drivers/net/wireless/ath/wil6210/ioctl.c

0 → 100644

+173 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (c) 2014 Qualcomm Atheros, Inc.
		*
		* Permission to use, copy, modify, and/or distribute this software for any
		* purpose with or without fee is hereby granted, provided that the above
		* copyright notice and this permission notice appear in all copies.
		*
		* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
		* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
		* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
		* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
		* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
		* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
		* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
		*/

		#include <linux/uaccess.h>

		#include "wil6210.h"
		#include <uapi/linux/wil6210_uapi.h>

		#define wil_hex_dump_ioctl(prefix_str, buf, len) \
		print_hex_dump_debug("DBG[IOC ]" prefix_str, \
		DUMP_PREFIX_OFFSET, 16, 1, buf, len, true)
		#define wil_dbg_ioctl(wil, fmt, arg...) wil_dbg(wil, "DBG[IOC ]" fmt, ##arg)

		static void __iomem wil_ioc_addr(struct wil6210_priv wil, uint32_t addr,
		uint32_t size, enum wil_memio_op op)
		{
		void __iomem *a;
		u32 off;

		switch (op & wil_mmio_addr_mask) {
		case wil_mmio_addr_linker:
		a = wmi_buffer(wil, cpu_to_le32(addr));
		break;
		case wil_mmio_addr_ahb:
		a = wmi_addr(wil, addr);
		break;
		case wil_mmio_addr_bar:
		a = wmi_addr(wil, addr + WIL6210_FW_HOST_OFF);
		break;
		default:
		wil_err(wil, "Unsupported address mode, op = 0x%08x\n", op);
		return NULL;
		}

		off = a - wil->csr;
		if (size >= WIL6210_MEM_SIZE - off) {
		wil_err(wil, "Requested block does not fit into memory: "
		"off = 0x%08x size = 0x%08x\n", off, size);
		return NULL;
		}

		return a;
		}

		static int wil_ioc_memio_dword(struct wil6210_priv wil, void __user data)
		{
		struct wil_memio io;
		void __iomem *a;
		bool need_copy = false;

		if (copy_from_user(&io, data, sizeof(io)))
		return -EFAULT;

		wil_dbg_ioctl(wil, "IO: addr = 0x%08x val = 0x%08x op = 0x%08x\n",
		io.addr, io.val, io.op);

		a = wil_ioc_addr(wil, io.addr, sizeof(u32), io.op);
		if (!a) {
		wil_err(wil, "invalid address 0x%08x, op = 0x%08x\n", io.addr,
		io.op);
		return -EINVAL;
		}
		/* operation */
		switch (io.op & wil_mmio_op_mask) {
		case wil_mmio_read:
		io.val = ioread32(a);
		need_copy = true;
		break;
		case wil_mmio_write:
		iowrite32(io.val, a);
		wmb(); /* make sure write propagated to HW */
		break;
		default:
		wil_err(wil, "Unsupported operation, op = 0x%08x\n", io.op);
		return -EINVAL;
		}

		if (need_copy) {
		wil_dbg_ioctl(wil, "IO done: addr = 0x%08x"
		" val = 0x%08x op = 0x%08x\n",
		io.addr, io.val, io.op);
		if (copy_to_user(data, &io, sizeof(io)))
		return -EFAULT;
		}

		return 0;
		}

		static int wil_ioc_memio_block(struct wil6210_priv wil, void __user data)
		{
		struct wil_memio_block io;
		void *block;
		void __iomem *a;
		int rc = 0;

		if (copy_from_user(&io, data, sizeof(io)))
		return -EFAULT;

		wil_dbg_ioctl(wil, "IO: addr = 0x%08x size = 0x%08x op = 0x%08x\n",
		io.addr, io.size, io.op);

		/* size */
		if (io.size % 4) {
		wil_err(wil, "size is not multiple of 4: 0x%08x\n", io.size);
		return -EINVAL;
		}

		a = wil_ioc_addr(wil, io.addr, io.size, io.op);
		if (!a) {
		wil_err(wil, "invalid address 0x%08x, op = 0x%08x\n", io.addr,
		io.op);
		return -EINVAL;
		}

		block = kmalloc(io.size, GFP_USER);
		if (!block)
		return -ENOMEM;

		/* operation */
		switch (io.op & wil_mmio_op_mask) {
		case wil_mmio_read:
		wil_memcpy_fromio_32(block, a, io.size);
		wil_hex_dump_ioctl("Read ", block, io.size);
		if (copy_to_user(io.block, block, io.size)) {
		rc = -EFAULT;
		goto out_free;
		}
		break;
		case wil_mmio_write:
		if (copy_from_user(block, io.block, io.size)) {
		rc = -EFAULT;
		goto out_free;
		}
		wil_memcpy_toio_32(a, block, io.size);
		wmb(); /* make sure write propagated to HW */
		wil_hex_dump_ioctl("Write ", block, io.size);
		break;
		default:
		wil_err(wil, "Unsupported operation, op = 0x%08x\n", io.op);
		rc = -EINVAL;
		break;
		}

		out_free:
		kfree(block);
		return rc;
		}

		int wil_ioctl(struct wil6210_priv wil, void __user data, int cmd)
		{
		switch (cmd) {
		case WIL_IOCTL_MEMIO:
		return wil_ioc_memio_dword(wil, data);
		case WIL_IOCTL_MEMIO_BLOCK:
		return wil_ioc_memio_block(wil, data);
		default:
		wil_dbg_ioctl(wil, "Unsupported IOCTL 0x%04x\n", cmd);
		return -ENOIOCTLCMD;
		}
		}

drivers/net/wireless/ath/wil6210/netdev.c

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Original line number	Diff line number	Diff line
		@@ -52,6 +52,17 @@ static int wil_change_mtu(struct net_device *ndev, int new_mtu)
		return 0;
		}

		static int wil_do_ioctl(struct net_device ndev, struct ifreq ifr, int cmd)
		{
		struct wil6210_priv *wil = ndev_to_wil(ndev);

		int ret = wil_ioctl(wil, ifr->ifr_data, cmd);

		wil_dbg_misc(wil, "ioctl(0x%04x) -> %d\n", cmd, ret);

		return ret;
		}

		static const struct net_device_ops wil_netdev_ops = {
		.ndo_open = wil_open,
		.ndo_stop = wil_stop,
		@@ -59,6 +70,7 @@ static const struct net_device_ops wil_netdev_ops = {
		.ndo_set_mac_address = eth_mac_addr,
		.ndo_validate_addr = eth_validate_addr,
		.ndo_change_mtu = wil_change_mtu,
		.ndo_do_ioctl = wil_do_ioctl,
		};

		static int wil6210_netdev_poll_rx(struct napi_struct *napi, int budget)

drivers/net/wireless/ath/wil6210/wil6210.h

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		@@ -595,5 +595,7 @@ void wil6210_unmask_irq_rx(struct wil6210_priv *wil);

		int wil_iftype_nl2wmi(enum nl80211_iftype type);

		int wil_ioctl(struct wil6210_priv wil, void __user data, int cmd);
		int wil_request_firmware(struct wil6210_priv wil, const char name);

		#endif /* __WIL6210_H__ */