@@ -12,6 +12,7 @@ wil6210-y += debug.o
wil6210-y += rx_reorder.o
wil6210-y += ioctl.o
wil6210-y += fw.o
+wil6210-y += pmc.o
wil6210-$(CONFIG_WIL6210_TRACING) += trace.o
wil6210-y += wil_platform.o
wil6210-y += ethtool.o
@@ -24,6 +24,7 @@
#include "wil6210.h"
#include "wmi.h"
#include "txrx.h"
+#include "pmc.h"
/* Nasty hack. Better have per device instances */
static u32 mem_addr;
@@ -702,6 +703,89 @@ static const struct file_operations fops_back = {
.open = simple_open,
};
+/* pmc control, write:
+ * - "alloc <num descriptors> <descriptor_size>" to allocate PMC
+ * - "free" to release memory allocated for PMC
+ */
+static ssize_t wil_write_pmccfg(struct file *file, const char __user *buf,
+ size_t len, loff_t *ppos)
+{
+ struct wil6210_priv *wil = file->private_data;
+ int rc;
+ char *kbuf = kmalloc(len + 1, GFP_KERNEL);
+ char cmd[9];
+ int num_descs, desc_size;
+
+ if (!kbuf)
+ return -ENOMEM;
+
+ rc = simple_write_to_buffer(kbuf, len, ppos, buf, len);
+ if (rc != len) {
+ kfree(kbuf);
+ return rc >= 0 ? -EIO : rc;
+ }
+
+ kbuf[len] = '\0';
+ rc = sscanf(kbuf, "%8s %d %d", cmd, &num_descs, &desc_size);
+ kfree(kbuf);
+
+ if (rc < 0)
+ return rc;
+
+ if (rc < 1) {
+ wil_err(wil, "pmccfg: no params given\n");
+ return -EINVAL;
+ }
+
+ if (0 == strcmp(cmd, "alloc")) {
+ if (rc != 3) {
+ wil_err(wil, "pmccfg: alloc requires 2 params\n");
+ return -EINVAL;
+ }
+ wil_pmc_alloc(wil, num_descs, desc_size);
+ } else if (0 == strcmp(cmd, "free")) {
+ if (rc != 1) {
+ wil_err(wil, "pmccfg: free does not have any params\n");
+ return -EINVAL;
+ }
+ wil_pmc_free(wil, true);
+ } else {
+ wil_err(wil, "pmccfg: Unrecognized command \"%s\"\n", cmd);
+ return -EINVAL;
+ }
+
+ return len;
+}
+
+static ssize_t wil_read_pmccfg(struct file *file, char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ struct wil6210_priv *wil = file->private_data;
+ char text[256];
+ char help[] = "pmc control, write:\n"
+ " - \"alloc <num descriptors> <descriptor_size>\" to allocate pmc\n"
+ " - \"free\" to free memory allocated for pmc\n";
+
+ sprintf(text, "Last command status: %d\n\n%s",
+ wil_pmc_last_cmd_status(wil),
+ help);
+
+ return simple_read_from_buffer(user_buf, count, ppos, text,
+ strlen(text) + 1);
+}
+
+static const struct file_operations fops_pmccfg = {
+ .read = wil_read_pmccfg,
+ .write = wil_write_pmccfg,
+ .open = simple_open,
+};
+
+static const struct file_operations fops_pmcdata = {
+ .open = simple_open,
+ .read = wil_pmc_read,
+ .llseek = wil_pmc_llseek,
+};
+
/*---tx_mgmt---*/
/* Write mgmt frame to this file to send it */
static ssize_t wil_write_file_txmgmt(struct file *file, const char __user *buf,
@@ -1363,6 +1447,8 @@ static const struct {
{"tx_mgmt", S_IWUSR, &fops_txmgmt},
{"wmi_send", S_IWUSR, &fops_wmi},
{"back", S_IRUGO | S_IWUSR, &fops_back},
+ {"pmccfg", S_IRUGO | S_IWUSR, &fops_pmccfg},
+ {"pmcdata", S_IRUGO, &fops_pmcdata},
{"temp", S_IRUGO, &fops_temp},
{"freq", S_IRUGO, &fops_freq},
{"link", S_IRUGO, &fops_link},
@@ -1440,6 +1526,8 @@ int wil6210_debugfs_init(struct wil6210_priv *wil)
if (IS_ERR_OR_NULL(dbg))
return -ENODEV;
+ wil_pmc_init(wil);
+
wil6210_debugfs_init_files(wil, dbg);
wil6210_debugfs_init_isr(wil, dbg);
wil6210_debugfs_init_blobs(wil, dbg);
@@ -1459,4 +1547,9 @@ void wil6210_debugfs_remove(struct wil6210_priv *wil)
{
debugfs_remove_recursive(wil->debug);
wil->debug = NULL;
+
+ /* free pmc memory without sending command to fw, as it will
+ * be reset on the way down anyway
+ */
+ wil_pmc_free(wil, false);
}
new file mode 100644
@@ -0,0 +1,375 @@
+/*
+ * Copyright (c) 2012-2015 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/types.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include "wmi.h"
+#include "wil6210.h"
+#include "txrx.h"
+#include "pmc.h"
+
+struct desc_alloc_info {
+ dma_addr_t pa;
+ void *va;
+};
+
+static int wil_is_pmc_allocated(struct pmc_ctx *pmc)
+{
+ return !!pmc->pring_va;
+}
+
+void wil_pmc_init(struct wil6210_priv *wil)
+{
+ memset(&wil->pmc, 0, sizeof(struct pmc_ctx));
+ mutex_init(&wil->pmc.lock);
+}
+
+/**
+ * Allocate the physical ring (p-ring) and the required
+ * number of descriptors of required size.
+ * Initialize the descriptors as required by pmc dma.
+ * The descriptors' buffers dwords are initialized to hold
+ * dword's serial number in the lsw and reserved value
+ * PCM_DATA_INVALID_DW_VAL in the msw.
+ */
+void wil_pmc_alloc(struct wil6210_priv *wil,
+ int num_descriptors,
+ int descriptor_size)
+{
+ u32 i;
+ struct pmc_ctx *pmc = &wil->pmc;
+ struct device *dev = wil_to_dev(wil);
+ struct wmi_pmc_cmd pmc_cmd = {0};
+
+ mutex_lock(&pmc->lock);
+
+ if (wil_is_pmc_allocated(pmc)) {
+ /* sanity check */
+ wil_err(wil, "%s: ERROR pmc is already allocated\n", __func__);
+ goto no_release_err;
+ }
+
+ pmc->num_descriptors = num_descriptors;
+ pmc->descriptor_size = descriptor_size;
+
+ wil_dbg_misc(wil, "%s: %d descriptors x %d bytes each\n",
+ __func__, num_descriptors, descriptor_size);
+
+ /* allocate descriptors info list in pmc context*/
+ pmc->descriptors = kcalloc(num_descriptors,
+ sizeof(struct desc_alloc_info),
+ GFP_KERNEL);
+ if (!pmc->descriptors) {
+ wil_err(wil, "%s: ERROR allocating pmc skb list\n", __func__);
+ goto no_release_err;
+ }
+
+ wil_dbg_misc(wil,
+ "%s: allocated descriptors info list %p\n",
+ __func__, pmc->descriptors);
+
+ /* Allocate pring buffer and descriptors.
+ * vring->va should be aligned on its size rounded up to power of 2
+ * This is granted by the dma_alloc_coherent
+ */
+ pmc->pring_va = dma_alloc_coherent(dev,
+ sizeof(struct vring_tx_desc) * num_descriptors,
+ &pmc->pring_pa,
+ GFP_KERNEL);
+
+ wil_dbg_misc(wil,
+ "%s: allocated pring %p. %zd x %d = total %zd bytes\n",
+ __func__,
+ (void *)pmc->pring_pa,
+ sizeof(struct vring_tx_desc),
+ num_descriptors,
+ sizeof(struct vring_tx_desc) * num_descriptors);
+
+ if (!pmc->pring_va) {
+ wil_err(wil, "%s: ERROR allocating pmc pring\n", __func__);
+ goto release_pmc_skb_list;
+ }
+
+ /* initially, all descriptors are SW owned
+ * For Tx, Rx, and PMC, ownership bit is at the same location, thus
+ * we can use any
+ */
+ for (i = 0; i < num_descriptors; i++) {
+ struct vring_tx_desc *_d = &pmc->pring_va[i];
+ struct vring_tx_desc dd, *d = ⅆ
+ int j = 0;
+
+ pmc->descriptors[i].va = dma_alloc_coherent(dev,
+ descriptor_size,
+ &pmc->descriptors[i].pa,
+ GFP_KERNEL);
+
+ if (unlikely(!pmc->descriptors[i].va)) {
+ wil_err(wil,
+ "%s: ERROR allocating pmc descriptor %d",
+ __func__, i);
+ goto release_pmc_skbs;
+ }
+
+ for (j = 0; j < descriptor_size / sizeof(u32); j++) {
+ u32 *p = (u32 *)pmc->descriptors[i].va + j;
+ *p = PCM_DATA_INVALID_DW_VAL | j;
+ }
+
+ /* configure dma descriptor */
+ d->dma.addr.addr_low =
+ cpu_to_le32(lower_32_bits(pmc->descriptors[i].pa));
+ d->dma.addr.addr_high =
+ cpu_to_le16((u16)upper_32_bits(pmc->descriptors[i].pa));
+ d->dma.status = 0; /* 0 = HW_OWNED */
+ d->dma.length = cpu_to_le16(descriptor_size);
+ d->dma.d0 = BIT(9) | RX_DMA_D0_CMD_DMA_IT;
+ *_d = *d;
+ }
+
+ wil_dbg_misc(wil, "%s: allocated successfully\n", __func__);
+
+ pmc_cmd.op = WMI_PMC_ALLOCATE;
+ pmc_cmd.ring_size = cpu_to_le16(pmc->num_descriptors);
+ pmc_cmd.mem_base = cpu_to_le64(pmc->pring_pa);
+
+ wil_dbg_misc(wil, "%s: send WMI_PMC_CMD with ALLOCATE op\n", __func__);
+ pmc->last_cmd_status = wmi_send(wil,
+ WMI_PMC_CMDID,
+ &pmc_cmd,
+ sizeof(pmc_cmd));
+ if (pmc->last_cmd_status) {
+ wil_err(wil,
+ "%s: WMI_PMC_CMD with ALLOCATE op failed with status %d",
+ __func__, pmc->last_cmd_status);
+ goto release_pmc_skbs;
+ }
+
+ mutex_unlock(&pmc->lock);
+
+ return;
+
+release_pmc_skbs:
+ wil_err(wil, "%s: exit on error: Releasing skbs...\n", __func__);
+ for (i = 0; pmc->descriptors[i].va && i < num_descriptors; i++) {
+ dma_free_coherent(dev,
+ descriptor_size,
+ pmc->descriptors[i].va,
+ pmc->descriptors[i].pa);
+
+ pmc->descriptors[i].va = NULL;
+ }
+ wil_err(wil, "%s: exit on error: Releasing pring...\n", __func__);
+
+ dma_free_coherent(dev,
+ sizeof(struct vring_tx_desc) * num_descriptors,
+ pmc->pring_va,
+ pmc->pring_pa);
+
+ pmc->pring_va = NULL;
+
+release_pmc_skb_list:
+ wil_err(wil, "%s: exit on error: Releasing descriptors info list...\n",
+ __func__);
+ kfree(pmc->descriptors);
+ pmc->descriptors = NULL;
+
+no_release_err:
+ pmc->last_cmd_status = -ENOMEM;
+ mutex_unlock(&pmc->lock);
+}
+
+/**
+ * Traverse the p-ring and release all buffers.
+ * At the end release the p-ring memory
+ */
+void wil_pmc_free(struct wil6210_priv *wil, int send_pmc_cmd)
+{
+ struct pmc_ctx *pmc = &wil->pmc;
+ struct device *dev = wil_to_dev(wil);
+ struct wmi_pmc_cmd pmc_cmd = {0};
+
+ mutex_lock(&pmc->lock);
+
+ pmc->last_cmd_status = 0;
+
+ if (!wil_is_pmc_allocated(pmc)) {
+ wil_dbg_misc(wil, "%s: Error, can't free - not allocated\n",
+ __func__);
+ pmc->last_cmd_status = -EPERM;
+ mutex_unlock(&pmc->lock);
+ return;
+ }
+
+ if (send_pmc_cmd) {
+ wil_dbg_misc(wil, "%s: send WMI_PMC_CMD with RELEASE op\n",
+ __func__);
+ pmc_cmd.op = WMI_PMC_RELEASE;
+ pmc->last_cmd_status =
+ wmi_send(wil, WMI_PMC_CMDID, &pmc_cmd,
+ sizeof(pmc_cmd));
+ if (pmc->last_cmd_status) {
+ wil_err(wil,
+ "%s WMI_PMC_CMD with RELEASE op failed, status %d",
+ __func__, pmc->last_cmd_status);
+ /* There's nothing we can do with this error.
+ * Normally, it should never occur.
+ * Continue to freeing all memory allocated for pmc.
+ */
+ }
+ }
+
+ if (pmc->pring_va) {
+ size_t buf_size = sizeof(struct vring_tx_desc) *
+ pmc->num_descriptors;
+
+ wil_dbg_misc(wil, "%s: free pring va %p\n",
+ __func__, pmc->pring_va);
+ dma_free_coherent(dev, buf_size, pmc->pring_va, pmc->pring_pa);
+
+ pmc->pring_va = NULL;
+ } else {
+ pmc->last_cmd_status = -ENOENT;
+ }
+
+ if (pmc->descriptors) {
+ int i;
+
+ for (i = 0;
+ pmc->descriptors[i].va && i < pmc->num_descriptors; i++) {
+ dma_free_coherent(dev,
+ pmc->descriptor_size,
+ pmc->descriptors[i].va,
+ pmc->descriptors[i].pa);
+ pmc->descriptors[i].va = NULL;
+ }
+ wil_dbg_misc(wil, "%s: free descriptor info %d/%d\n",
+ __func__, i, pmc->num_descriptors);
+ wil_dbg_misc(wil,
+ "%s: free pmc descriptors info list %p\n",
+ __func__, pmc->descriptors);
+ kfree(pmc->descriptors);
+ pmc->descriptors = NULL;
+ } else {
+ pmc->last_cmd_status = -ENOENT;
+ }
+
+ mutex_unlock(&pmc->lock);
+}
+
+/**
+ * Status of the last operation requested via debugfs: alloc/free/read.
+ * 0 - success or negative errno
+ */
+int wil_pmc_last_cmd_status(struct wil6210_priv *wil)
+{
+ wil_dbg_misc(wil, "%s: status %d\n", __func__,
+ wil->pmc.last_cmd_status);
+
+ return wil->pmc.last_cmd_status;
+}
+
+/**
+ * Read from required position up to the end of current descriptor,
+ * depends on descriptor size configured during alloc request.
+ */
+ssize_t wil_pmc_read(struct file *filp, char __user *buf, size_t count,
+ loff_t *f_pos)
+{
+ struct wil6210_priv *wil = filp->private_data;
+ struct pmc_ctx *pmc = &wil->pmc;
+ size_t retval = 0;
+ unsigned long long idx;
+ loff_t offset;
+ size_t pmc_size = pmc->descriptor_size * pmc->num_descriptors;
+
+ mutex_lock(&pmc->lock);
+
+ if (!wil_is_pmc_allocated(pmc)) {
+ wil_err(wil, "%s: error, pmc is not allocated!\n", __func__);
+ pmc->last_cmd_status = -EPERM;
+ mutex_unlock(&pmc->lock);
+ return -EPERM;
+ }
+
+ wil_dbg_misc(wil,
+ "%s: size %u, pos %lld\n",
+ __func__, (unsigned)count, *f_pos);
+
+ pmc->last_cmd_status = 0;
+
+ idx = *f_pos;
+ do_div(idx, pmc->descriptor_size);
+ offset = *f_pos - (idx * pmc->descriptor_size);
+
+ if (*f_pos >= pmc_size) {
+ wil_dbg_misc(wil, "%s: reached end of pmc buf: %lld >= %u\n",
+ __func__, *f_pos, (unsigned)pmc_size);
+ pmc->last_cmd_status = -ERANGE;
+ goto out;
+ }
+
+ wil_dbg_misc(wil,
+ "%s: read from pos %lld (descriptor %llu, offset %llu) %zu bytes\n",
+ __func__, *f_pos, idx, offset, count);
+
+ /* if no errors, return the copied byte count */
+ retval = simple_read_from_buffer(buf,
+ count,
+ &offset,
+ pmc->descriptors[idx].va,
+ pmc->descriptor_size);
+ *f_pos += retval;
+out:
+ mutex_unlock(&pmc->lock);
+
+ return retval;
+}
+
+loff_t wil_pmc_llseek(struct file *filp, loff_t off, int whence)
+{
+ loff_t newpos;
+ struct wil6210_priv *wil = filp->private_data;
+ struct pmc_ctx *pmc = &wil->pmc;
+ size_t pmc_size = pmc->descriptor_size * pmc->num_descriptors;
+
+ switch (whence) {
+ case 0: /* SEEK_SET */
+ newpos = off;
+ break;
+
+ case 1: /* SEEK_CUR */
+ newpos = filp->f_pos + off;
+ break;
+
+ case 2: /* SEEK_END */
+ newpos = pmc_size;
+ break;
+
+ default: /* can't happen */
+ return -EINVAL;
+ }
+
+ if (newpos < 0)
+ return -EINVAL;
+ if (newpos > pmc_size)
+ newpos = pmc_size;
+
+ filp->f_pos = newpos;
+
+ return newpos;
+}
new file mode 100644
@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) 2012-2015 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/types.h>
+
+#define PCM_DATA_INVALID_DW_VAL (0xB0BA0000)
+
+void wil_pmc_init(struct wil6210_priv *wil);
+void wil_pmc_alloc(struct wil6210_priv *wil,
+ int num_descriptors, int descriptor_size);
+void wil_pmc_free(struct wil6210_priv *wil, int send_pmc_cmd);
+int wil_pmc_last_cmd_status(struct wil6210_priv *wil);
+ssize_t wil_pmc_read(struct file *, char __user *, size_t, loff_t *);
+loff_t wil_pmc_llseek(struct file *filp, loff_t off, int whence);
@@ -21,6 +21,7 @@
#include <linux/wireless.h>
#include <net/cfg80211.h>
#include <linux/timex.h>
+#include <linux/types.h>
#include "wil_platform.h"
extern bool no_fw_recovery;
@@ -527,6 +528,17 @@ struct wil_probe_client_req {
u8 cid;
};
+struct pmc_ctx {
+ /* alloc, free, and read operations must own the lock */
+ struct mutex lock;
+ struct vring_tx_desc *pring_va;
+ dma_addr_t pring_pa;
+ struct desc_alloc_info *descriptors;
+ int last_cmd_status;
+ int num_descriptors;
+ int descriptor_size;
+};
+
struct wil6210_priv {
struct pci_dev *pdev;
int n_msi;
@@ -611,6 +623,8 @@ struct wil6210_priv {
void *platform_handle;
struct wil_platform_ops platform_ops;
+
+ struct pmc_ctx pmc;
};
#define wil_to_wiphy(i) (i->wdev->wiphy)
@@ -836,6 +836,21 @@ struct wmi_temp_sense_cmd {
} __packed;
/*
+ * WMI_PMC_CMDID
+ */
+enum wmi_pmc_op_e {
+ WMI_PMC_ALLOCATE = 0,
+ WMI_PMC_RELEASE = 1,
+};
+
+struct wmi_pmc_cmd {
+ u8 op; /* enum wmi_pmc_cmd_op_type */
+ u8 reserved;
+ __le16 ring_size;
+ __le64 mem_base;
+} __packed;
+
+/*
* WMI Events
*/