summaryrefslogtreecommitdiff
path: root/drivers/net/wireless/brcm80211/brcmfmac/firmware.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/net/wireless/brcm80211/brcmfmac/firmware.c')
-rw-r--r--drivers/net/wireless/brcm80211/brcmfmac/firmware.c189
1 files changed, 181 insertions, 8 deletions
diff --git a/drivers/net/wireless/brcm80211/brcmfmac/firmware.c b/drivers/net/wireless/brcm80211/brcmfmac/firmware.c
index 9cb99152ad17..8ff31ffa4a41 100644
--- a/drivers/net/wireless/brcm80211/brcmfmac/firmware.c
+++ b/drivers/net/wireless/brcm80211/brcmfmac/firmware.c
@@ -23,6 +23,10 @@
#include "debug.h"
#include "firmware.h"
+#define BRCMF_FW_MAX_NVRAM_SIZE 64000
+#define BRCMF_FW_NVRAM_DEVPATH_LEN 19 /* devpath0=pcie/1/4/ */
+#define BRCMF_FW_NVRAM_PCIEDEV_LEN 9 /* pcie/1/4/ */
+
char brcmf_firmware_path[BRCMF_FW_PATH_LEN];
module_param_string(firmware_path, brcmf_firmware_path,
BRCMF_FW_PATH_LEN, 0440);
@@ -46,6 +50,8 @@ enum nvram_parser_state {
* @column: current column in line.
* @pos: byte offset in input buffer.
* @entry: start position of key,value entry.
+ * @multi_dev_v1: detect pcie multi device v1 (compressed).
+ * @multi_dev_v2: detect pcie multi device v2.
*/
struct nvram_parser {
enum nvram_parser_state state;
@@ -56,6 +62,8 @@ struct nvram_parser {
u32 column;
u32 pos;
u32 entry;
+ bool multi_dev_v1;
+ bool multi_dev_v2;
};
static bool is_nvram_char(char c)
@@ -108,6 +116,10 @@ static enum nvram_parser_state brcmf_nvram_handle_key(struct nvram_parser *nvp)
st = COMMENT;
else
st = VALUE;
+ if (strncmp(&nvp->fwnv->data[nvp->entry], "devpath", 7) == 0)
+ nvp->multi_dev_v1 = true;
+ if (strncmp(&nvp->fwnv->data[nvp->entry], "pcie/", 5) == 0)
+ nvp->multi_dev_v2 = true;
} else if (!is_nvram_char(c)) {
brcmf_dbg(INFO, "warning: ln=%d:col=%d: '=' expected, skip invalid key entry\n",
nvp->line, nvp->column);
@@ -133,6 +145,8 @@ brcmf_nvram_handle_value(struct nvram_parser *nvp)
ekv = (u8 *)&nvp->fwnv->data[nvp->pos];
skv = (u8 *)&nvp->fwnv->data[nvp->entry];
cplen = ekv - skv;
+ if (nvp->nvram_len + cplen + 1 >= BRCMF_FW_MAX_NVRAM_SIZE)
+ return END;
/* copy to output buffer */
memcpy(&nvp->nvram[nvp->nvram_len], skv, cplen);
nvp->nvram_len += cplen;
@@ -180,10 +194,18 @@ static enum nvram_parser_state
static int brcmf_init_nvram_parser(struct nvram_parser *nvp,
const struct firmware *nv)
{
+ size_t size;
+
memset(nvp, 0, sizeof(*nvp));
nvp->fwnv = nv;
+ /* Limit size to MAX_NVRAM_SIZE, some files contain lot of comment */
+ if (nv->size > BRCMF_FW_MAX_NVRAM_SIZE)
+ size = BRCMF_FW_MAX_NVRAM_SIZE;
+ else
+ size = nv->size;
/* Alloc for extra 0 byte + roundup by 4 + length field */
- nvp->nvram = kzalloc(nv->size + 1 + 3 + sizeof(u32), GFP_KERNEL);
+ size += 1 + 3 + sizeof(u32);
+ nvp->nvram = kzalloc(size, GFP_KERNEL);
if (!nvp->nvram)
return -ENOMEM;
@@ -192,12 +214,136 @@ static int brcmf_init_nvram_parser(struct nvram_parser *nvp,
return 0;
}
+/* brcmf_fw_strip_multi_v1 :Some nvram files contain settings for multiple
+ * devices. Strip it down for one device, use domain_nr/bus_nr to determine
+ * which data is to be returned. v1 is the version where nvram is stored
+ * compressed and "devpath" maps to index for valid entries.
+ */
+static void brcmf_fw_strip_multi_v1(struct nvram_parser *nvp, u16 domain_nr,
+ u16 bus_nr)
+{
+ u32 i, j;
+ bool found;
+ u8 *nvram;
+ u8 id;
+
+ nvram = kzalloc(nvp->nvram_len + 1 + 3 + sizeof(u32), GFP_KERNEL);
+ if (!nvram)
+ goto fail;
+
+ /* min length: devpath0=pcie/1/4/ + 0:x=y */
+ if (nvp->nvram_len < BRCMF_FW_NVRAM_DEVPATH_LEN + 6)
+ goto fail;
+
+ /* First search for the devpathX and see if it is the configuration
+ * for domain_nr/bus_nr. Search complete nvp
+ */
+ found = false;
+ i = 0;
+ while (i < nvp->nvram_len - BRCMF_FW_NVRAM_DEVPATH_LEN) {
+ /* Format: devpathX=pcie/Y/Z/
+ * Y = domain_nr, Z = bus_nr, X = virtual ID
+ */
+ if ((strncmp(&nvp->nvram[i], "devpath", 7) == 0) &&
+ (strncmp(&nvp->nvram[i + 8], "=pcie/", 6) == 0)) {
+ if (((nvp->nvram[i + 14] - '0') == domain_nr) &&
+ ((nvp->nvram[i + 16] - '0') == bus_nr)) {
+ id = nvp->nvram[i + 7] - '0';
+ found = true;
+ break;
+ }
+ }
+ while (nvp->nvram[i] != 0)
+ i++;
+ i++;
+ }
+ if (!found)
+ goto fail;
+
+ /* Now copy all valid entries, release old nvram and assign new one */
+ i = 0;
+ j = 0;
+ while (i < nvp->nvram_len) {
+ if ((nvp->nvram[i] - '0' == id) && (nvp->nvram[i + 1] == ':')) {
+ i += 2;
+ while (nvp->nvram[i] != 0) {
+ nvram[j] = nvp->nvram[i];
+ i++;
+ j++;
+ }
+ nvram[j] = 0;
+ j++;
+ }
+ while (nvp->nvram[i] != 0)
+ i++;
+ i++;
+ }
+ kfree(nvp->nvram);
+ nvp->nvram = nvram;
+ nvp->nvram_len = j;
+ return;
+
+fail:
+ kfree(nvram);
+ nvp->nvram_len = 0;
+}
+
+/* brcmf_fw_strip_multi_v2 :Some nvram files contain settings for multiple
+ * devices. Strip it down for one device, use domain_nr/bus_nr to determine
+ * which data is to be returned. v2 is the version where nvram is stored
+ * uncompressed, all relevant valid entries are identified by
+ * pcie/domain_nr/bus_nr:
+ */
+static void brcmf_fw_strip_multi_v2(struct nvram_parser *nvp, u16 domain_nr,
+ u16 bus_nr)
+{
+ u32 i, j;
+ u8 *nvram;
+
+ nvram = kzalloc(nvp->nvram_len + 1 + 3 + sizeof(u32), GFP_KERNEL);
+ if (!nvram)
+ goto fail;
+
+ /* Copy all valid entries, release old nvram and assign new one.
+ * Valid entries are of type pcie/X/Y/ where X = domain_nr and
+ * Y = bus_nr.
+ */
+ i = 0;
+ j = 0;
+ while (i < nvp->nvram_len - BRCMF_FW_NVRAM_PCIEDEV_LEN) {
+ if ((strncmp(&nvp->nvram[i], "pcie/", 5) == 0) &&
+ (nvp->nvram[i + 6] == '/') && (nvp->nvram[i + 8] == '/') &&
+ ((nvp->nvram[i + 5] - '0') == domain_nr) &&
+ ((nvp->nvram[i + 7] - '0') == bus_nr)) {
+ i += BRCMF_FW_NVRAM_PCIEDEV_LEN;
+ while (nvp->nvram[i] != 0) {
+ nvram[j] = nvp->nvram[i];
+ i++;
+ j++;
+ }
+ nvram[j] = 0;
+ j++;
+ }
+ while (nvp->nvram[i] != 0)
+ i++;
+ i++;
+ }
+ kfree(nvp->nvram);
+ nvp->nvram = nvram;
+ nvp->nvram_len = j;
+ return;
+fail:
+ kfree(nvram);
+ nvp->nvram_len = 0;
+}
+
/* brcmf_nvram_strip :Takes a buffer of "<var>=<value>\n" lines read from a fil
* and ending in a NUL. Removes carriage returns, empty lines, comment lines,
* and converts newlines to NULs. Shortens buffer as needed and pads with NULs.
* End of buffer is completed with token identifying length of buffer.
*/
-static void *brcmf_fw_nvram_strip(const struct firmware *nv, u32 *new_length)
+static void *brcmf_fw_nvram_strip(const struct firmware *nv, u32 *new_length,
+ u16 domain_nr, u16 bus_nr)
{
struct nvram_parser nvp;
u32 pad;
@@ -212,6 +358,16 @@ static void *brcmf_fw_nvram_strip(const struct firmware *nv, u32 *new_length)
if (nvp.state == END)
break;
}
+ if (nvp.multi_dev_v1)
+ brcmf_fw_strip_multi_v1(&nvp, domain_nr, bus_nr);
+ else if (nvp.multi_dev_v2)
+ brcmf_fw_strip_multi_v2(&nvp, domain_nr, bus_nr);
+
+ if (nvp.nvram_len == 0) {
+ kfree(nvp.nvram);
+ return NULL;
+ }
+
pad = nvp.nvram_len;
*new_length = roundup(nvp.nvram_len + 1, 4);
while (pad != *new_length) {
@@ -239,6 +395,8 @@ struct brcmf_fw {
u16 flags;
const struct firmware *code;
const char *nvram_name;
+ u16 domain_nr;
+ u16 bus_nr;
void (*done)(struct device *dev, const struct firmware *fw,
void *nvram_image, u32 nvram_len);
};
@@ -254,7 +412,8 @@ static void brcmf_fw_request_nvram_done(const struct firmware *fw, void *ctx)
goto fail;
if (fw) {
- nvram = brcmf_fw_nvram_strip(fw, &nvram_length);
+ nvram = brcmf_fw_nvram_strip(fw, &nvram_length,
+ fwctx->domain_nr, fwctx->bus_nr);
release_firmware(fw);
if (!nvram && !(fwctx->flags & BRCMF_FW_REQ_NV_OPTIONAL))
goto fail;
@@ -309,11 +468,12 @@ fail:
kfree(fwctx);
}
-int brcmf_fw_get_firmwares(struct device *dev, u16 flags,
- const char *code, const char *nvram,
- void (*fw_cb)(struct device *dev,
- const struct firmware *fw,
- void *nvram_image, u32 nvram_len))
+int brcmf_fw_get_firmwares_pcie(struct device *dev, u16 flags,
+ const char *code, const char *nvram,
+ void (*fw_cb)(struct device *dev,
+ const struct firmware *fw,
+ void *nvram_image, u32 nvram_len),
+ u16 domain_nr, u16 bus_nr)
{
struct brcmf_fw *fwctx;
@@ -333,8 +493,21 @@ int brcmf_fw_get_firmwares(struct device *dev, u16 flags,
fwctx->done = fw_cb;
if (flags & BRCMF_FW_REQUEST_NVRAM)
fwctx->nvram_name = nvram;
+ fwctx->domain_nr = domain_nr;
+ fwctx->bus_nr = bus_nr;
return request_firmware_nowait(THIS_MODULE, true, code, dev,
GFP_KERNEL, fwctx,
brcmf_fw_request_code_done);
}
+
+int brcmf_fw_get_firmwares(struct device *dev, u16 flags,
+ const char *code, const char *nvram,
+ void (*fw_cb)(struct device *dev,
+ const struct firmware *fw,
+ void *nvram_image, u32 nvram_len))
+{
+ return brcmf_fw_get_firmwares_pcie(dev, flags, code, nvram, fw_cb, 0,
+ 0);
+}
+
generated by cgit v1.2.3 (git 2.0.4) at 2025-01-30 19:45:36 +0000